WO2017190628A1 - Procédé de détection de défaut de vanne à quatre voies, appareil de détection de défaut de vanne à quatre voies et climatiseur - Google Patents

Procédé de détection de défaut de vanne à quatre voies, appareil de détection de défaut de vanne à quatre voies et climatiseur Download PDF

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Publication number
WO2017190628A1
WO2017190628A1 PCT/CN2017/082265 CN2017082265W WO2017190628A1 WO 2017190628 A1 WO2017190628 A1 WO 2017190628A1 CN 2017082265 W CN2017082265 W CN 2017082265W WO 2017190628 A1 WO2017190628 A1 WO 2017190628A1
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Prior art keywords
temperature
air conditioner
heat exchanger
way valve
user
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Ceased
Application number
PCT/CN2017/082265
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English (en)
Chinese (zh)
Inventor
申孟亮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
Guangdong Midea Refrigeration Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from CN201610298345.9A external-priority patent/CN105928278A/zh
Priority claimed from CN201610298344.4A external-priority patent/CN105928150A/zh
Priority claimed from CN201610298391.9A external-priority patent/CN105928279A/zh
Application filed by Midea Group Co Ltd, Guangdong Midea Refrigeration Equipment Co Ltd filed Critical Midea Group Co Ltd
Publication of WO2017190628A1 publication Critical patent/WO2017190628A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems

Definitions

  • the invention relates to the technical field of air conditioners, in particular to a four-way valve fault detecting method, a four-way valve fault detecting device and an air conditioner.
  • the existing cold and warm air conditioners are all switched by the four-way valve for mode switching, and the frequency of use is relatively high, but with the operation of the air conditioner, the air conditioner generates foreign matter, such as: compressor cylinder wear particles, system welding slag, etc.
  • foreign matter such as: compressor cylinder wear particles, system welding slag, etc.
  • most air conditioners are equipped with filters, filters, etc. for isolating foreign objects, some foreign objects cannot be isolated by the filter due to their special position or small diameter. Therefore, such foreign matter is extremely easy.
  • Entering into the four-way valve piston causes the four-way valve to fail without reversing or incompletely reversing.
  • the air conditioner does not work normally, and the maintenance workload is very large.
  • the present invention aims to solve at least one of the technical problems existing in the prior art or related art.
  • the embodiment of the first aspect of the present invention provides a four-way valve fault detection method, including: detecting a temperature of an indoor heat exchanger and a temperature of an indoor environment and a user-set working mode; The temperature of the heat exchanger and the temperature of the indoor environment determine whether the current operating mode of the air conditioner is the same as the working mode set by the user, if the current operating mode of the air conditioner and the user-set work If the mode is different, it is determined that the four-way valve is in the commutation abnormal state, and if the current operation mode of the air conditioner is the same as the operation mode set by the user, it is determined that the four-way valve is in the commutation normal state.
  • the four-way valve fault detecting method can detect the temperature of the indoor heat exchanger and the temperature of the indoor environment and the working mode set by the user, thereby being able to be based on the temperature of the indoor heat exchanger and the indoor
  • the temperature of the environment determines whether the current operating mode of the air conditioner is the same as the working mode set by the user, so that when the current operating mode of the air conditioner is different from the working mode set by the user, it can be determined that the four-way valve is not changed according to the regulations.
  • the four-way valve is in a reversing abnormal state, and then the user can be notified in time to repair the four-way valve.
  • the four-way can be determined.
  • the valve has been reversing according to the regulations, that is, the four-way valve is in the normal state of commutation, so no treatment can be done.
  • the determining according to the temperature of the indoor heat exchanger and the temperature of the indoor environment is: determining whether the temperature of the indoor heat exchanger is greater than or equal to the temperature of the indoor environment and the first preset temperature value.
  • determining if the temperature of the indoor heat exchanger is greater than or equal to a sum of a temperature of the indoor environment and the first preset temperature value, determining a current operating mode of the air conditioner and a working mode set by the user Differently, if the temperature of the indoor heat exchanger is less than the sum of the temperature of the indoor environment and the first preset temperature value, determining that the current operating mode of the air conditioner is the same as the working mode set by the user Wherein the first preset temperature value is greater than or equal to detecting when detecting the temperature of the indoor heat exchanger difference.
  • the process of determining the failure of the four-way valve by using the temperature of the indoor heat exchanger and the temperature of the indoor environment is different, specifically, cooling or pumping in the air conditioner.
  • the indoor heat exchanger is equivalent to an evaporator, in which the refrigerant generates heat after evaporation and heat absorption, and the amount of cold produced can only be transferred to the room through heat transfer. Therefore, the indoor cooling capacity is derived from Indoor heat exchanger, according to the law of energy transmission, the temperature of the indoor heat exchanger must be lower than the indoor ambient temperature.
  • the user-set working mode is the cooling mode or the dehumidification mode
  • the indoor heat exchanger The temperature is still higher than or equal to the indoor ambient temperature, it is inevitable that the current operating mode of the air conditioner is not the cooling mode or the dehumidification mode, that is, the four-way valve is not normally reversing or not completely reversing, and then the four-way can be determined.
  • the valve has a fault, but considering the detection error when detecting the temperature of the indoor heat exchanger, if the user sets the working mode to the cooling mode or the dehumidification mode, if the indoor change The temperature of the device is higher or lower than the indoor ambient temperature, which does not necessarily indicate the abnormality of the four-way valve. Therefore, the four-way valve fault detection method provided by the technical solution appropriately considers the detection of the indoor heat exchanger.
  • the detection error at the temperature prevents the occurrence of false detection due to the temperature detection error, thereby improving the accuracy of the four-way valve failure detection method.
  • the first preset temperature value is greater than or equal to 1 ° C.
  • the failure detection of the four-way valve In the process, only when the temperature of the indoor heat exchanger is higher than 1 °C of the indoor ambient temperature, the four-way valve is not reversing or not completely reversing, so as to avoid the mistake of the four-way valve due to the detection error. Fault detection, which in turn improves the accuracy of four-way valve fault detection.
  • the air conditioner when it is detected that the working mode set by the user is the heating mode, the air conditioner is determined according to the temperature of the indoor heat exchanger and the temperature of the indoor environment. Whether the current operating mode is the same as the working mode set by the user is: determining whether the temperature of the indoor heat exchanger is less than or equal to the sum of the temperature of the indoor environment and the second preset temperature value, If the temperature of the indoor heat exchanger is less than or equal to the sum of the temperature of the indoor environment and the second preset temperature value, determining that the current operating mode of the air conditioner is different from the working mode set by the user, The temperature of the indoor heat exchanger is greater than the sum of the temperature of the indoor environment and the second preset temperature value, determining that the current operating mode of the air conditioner is the same as the working mode set by the user; The second preset temperature value is greater than or equal to a detection error value when detecting the temperature of the indoor heat exchanger.
  • the working mode set by the user when the working mode set by the user is the heating mode, the heat of the indoor environment is derived from the indoor heat exchanger, and therefore, the temperature of the indoor heat exchanger is necessarily higher than the temperature of the indoor environment, and therefore,
  • the working mode set by the user is the heating mode, if the temperature of the indoor heat exchanger is lower than or equal to the indoor ambient temperature, it is inevitable that the current operating mode of the air conditioner is not the heating mode, so that the four-way valve can be determined. If the four-way valve is in an abnormal state, the detection error of the indoor heat exchanger is also considered.
  • the temperature of the heat exchanger is higher or lower than the indoor ambient temperature, which does not necessarily indicate the abnormality of the four-way valve. Therefore, the four-way valve fault detection method provided by the technical solution also appropriately considers the temperature detection.
  • the error can prevent the occurrence of false detection due to the temperature detection error, thereby improving the accuracy of the four-way valve fault detection method.
  • the second preset temperature value is greater than or equal to 1 ° C.
  • the failure detection of the four-way valve is in progress. Only when the temperature of the indoor heat exchanger is lower than 1 °C of the indoor ambient temperature, the four-way valve is not reversing or not completely reversing, so that the fault detection caused by the detection error can be avoided, thereby improving the fourth The accuracy of the valve fault detection.
  • the four-way valve fault detecting method further includes: determining whether a current condition of the air conditioner meets a preset condition; and determining that a current condition of the air conditioner meets a preset In the condition, the step of detecting the temperature of the indoor heat exchanger and the temperature of the indoor environment and the working mode set by the user is performed; wherein the preset condition includes at least one of the following conditions: the running time of the air conditioner is greater than Equivalent to a predetermined running time; the current operating mode of the air conditioner is a non-automatic operating mode; the current operating mode of the air conditioner is a non-supply operating mode; the current operating mode of the air conditioner is a non-defrosting mode, and The air conditioner is separated from the defrosting end time by a preset time.
  • the current condition of the air conditioner is judged, and the fault determination is performed only when the current condition of the air conditioner satisfies the preset condition, thereby preventing misjudgment and further improving the four-way valve failure.
  • the accuracy of the test method is performed only when the current condition of the air conditioner satisfies the preset condition, thereby preventing misjudgment and further improving the four-way valve failure.
  • the air conditioner when the air conditioner is just running, the amount of cooling or the amount of heat generated by the air conditioner is still very small, and therefore, it is insufficient to cause a temperature difference between the indoor heat exchanger and the indoor environment, and therefore, in this case, if The four-way valve failure detecting method is performed on the four-way valve Fault detection is extremely prone to false detection, so that the fault detection of the four-way valve can be improved after the running time of the air conditioner is greater than or equal to the preset time.
  • the air conditioner When the operation mode is the automatic operation mode, since the air conditioner itself adjusts the working mode from time to time, it is not suitable to use the four-way valve failure detection method to detect the failure of the four-way valve at this time, and further, the air conditioner is in the delivery state. In the wind mode, the compressor is not running. At this time, the air conditioner does not perform corresponding cooling or heating. Therefore, there is no temperature difference between the indoor heat exchanger and the indoor environment. Therefore, it is not suitable to use the method for four-way. Valve fault detection.
  • the four-way valve fault detection method to detect the fault of the four-way valve, because the essence of defrosting is to adjust the working mode of the air conditioner to Heating mode, therefore, during the defrosting period or shortly after the defrosting, the temperature of the indoor heat exchanger and the temperature of the indoor environment will change due to the change of the operating mode of the air conditioner. Therefore, It is possible to determine the abnormality of the four-way valve commutation simply based on the difference between the temperature of the indoor heat exchanger and the temperature of the indoor environment.
  • the four-way valve failure detecting method further comprises: after the determining that the four-way valve is in a commutation abnormal state, outputting a four-way valve commutation abnormality signal.
  • an alarm output device such as an alarm device or a display screen
  • it is determined that the four-way valve is in a reversing abnormal state that is, after the reversing or not completely reversing, the sound, light, and text are emitted.
  • Various prompts, etc. in order to prompt the user that the four-way valve of the air conditioner is in an abnormal state, thereby facilitating the user to repair the air conditioner in time, and on the other hand, generating and outputting the four-way valve through the signal output device Abnormal signal, so that the air conditioner automatically repairs the four-way valve according to the received four-way valve reversal abnormal signal.
  • An embodiment of the second aspect of the present invention provides a four-way valve fault detecting method, including: detecting a temperature of an indoor heat exchanger and a temperature of an outdoor heat exchanger and a user-set working mode; according to the indoor heat exchanger And the temperature of the outdoor heat exchanger determines whether the current operating mode of the air conditioner is the same as the operating mode set by the user, if the current operating mode of the air conditioner and the user-set work If the mode is different, it is determined that the four-way valve is in the commutation abnormal state, and if the current operation mode of the air conditioner is the same as the operation mode set by the user, it is determined that the four-way valve is in the commutation normal state.
  • the four-way valve fault detecting method can detect the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger and the working mode set by the user, thereby being able to be based on the temperature of the indoor heat exchanger And the temperature of the outdoor heat exchanger determines whether the current operating mode of the air conditioner is set with the user The working mode is the same, so that when the current operating mode of the air conditioner is different from the working mode set by the user, it can be determined that the four-way valve is not reversing according to the regulation, that is, the four-way valve is in the state of commutation abnormality, and then Timely notify the user to repair the four-way valve.
  • the determining according to the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger The specific process of whether the current operating mode of the air conditioner is the same as the working mode set by the user is: determining whether the temperature of the indoor heat exchanger is greater than or equal to the temperature of the outdoor heat exchanger, if If the temperature of the indoor heat exchanger is greater than or equal to the temperature of the outdoor heat exchanger, it is determined that the current operating mode of the air conditioner is different from the operating mode set by the user, if the temperature of the indoor heat exchanger is less than the The temperature of the outdoor heat exchanger determines that the current operating mode of the air conditioner is the same as the operating mode set by the user.
  • the process of determining the fault of the four-way valve by using the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger is different, specifically, cooling is performed in the air conditioner.
  • the indoor heat exchanger is an evaporator
  • the outdoor heat exchanger is a condenser, so that the refrigerant will continuously evaporate and absorb heat in the indoor heat exchanger and continuously condense heat in the outdoor heat exchanger.
  • the heat in the room is continuously released to the outside to achieve the purpose of cooling mode or dehumidification mode.
  • the temperature of the indoor heat exchanger must be lower than the temperature of the outdoor heat exchanger. Therefore, the working mode set by the user is the cooling mode or pumping.
  • the wet mode if the temperature of the indoor heat exchanger is higher than or equal to the temperature of the outdoor heat exchanger, it is inevitable that the current operating mode of the air conditioner is not the cooling mode or the dehumidification mode, that is, the four-way valve is not normally reversed or If the steering is not completely reversed, it can be determined that the four-way valve has a commutation fault.
  • the determining according to the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger Whether the current operation mode of the air conditioner is the same as the working mode set by the user is: determining whether the temperature of the indoor heat exchanger is less than or equal to the temperature of the outdoor heat exchanger, if the indoor heat exchange If the temperature of the outdoor heat exchanger is less than or equal to the temperature of the outdoor heat exchanger, it is determined that the current operating mode of the air conditioner is different from the working mode set by the user, if the temperature of the indoor heat exchanger is greater than the outdoor heat exchange Device The temperature of the air conditioner is determined to be the same as the operating mode set by the user.
  • the refrigerant in the outdoor heat exchanger evaporates and absorbs heat, and then the heat source is continuously delivered to the indoor heat exchanger, thereby transferring heat through heat transfer. Dissipated into the room, therefore, the temperature of the indoor heat exchanger must be higher than the temperature of the outdoor heat exchanger.
  • the operating mode set by the user is the heating mode
  • the temperature of the indoor heat exchanger is still lower than or equal to the outdoor
  • the temperature of the heat exchanger is inevitable that the current operating mode of the air conditioner is not the heating mode, so that it can be determined that the four-way valve is not reversing or not completely reversing, that is, the four-way valve is in a commutation abnormal state.
  • the four-way valve fault detecting method further includes: determining whether a current condition of the air conditioner meets a preset condition; and determining that a current condition of the air conditioner meets a preset And the step of detecting the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger and the user-set working mode; wherein the preset condition includes at least one of the following conditions: operation of the air conditioner The time is greater than or equal to the predetermined running time; the current operating mode of the air conditioner is a non-automatic operating mode; the current operating mode of the air conditioner is a non-airing operating mode; and the current operating mode of the air conditioner is a non-defrosting mode. And the air conditioner is separated from the defrosting end time by a preset time.
  • the current condition of the air conditioner is judged, and the fault determination is performed only when the current condition of the air conditioner satisfies the preset condition, thereby preventing misjudgment and further improving the four-way valve failure.
  • the accuracy of the test method is performed only when the current condition of the air conditioner satisfies the preset condition, thereby preventing misjudgment and further improving the four-way valve failure.
  • the air conditioner operating mode is the automatic operation mode, since the air conditioner itself adjusts the working mode from time to time, it is not suitable for using the four-way at this time.
  • the valve fault detection method detects the fault of the four-way valve.
  • the air conditioner is in the air supply mode, the compressor is not operated, and the air conditioner does not perform the corresponding cooling mode or heating mode, therefore, the indoor heat exchanger There is also no temperature difference between the outdoor heat exchanger and the outdoor heat exchanger. Therefore, it is not suitable to use this method for fault detection of the four-way valve.
  • the four-way valve failure detecting method further comprises: after the determining that the four-way valve is in a commutation abnormal state, outputting a four-way valve commutation abnormality signal.
  • an alarm output device such as an alarm device or a display screen
  • it is determined that the four-way valve is in a reversing abnormal state that is, after the reversing or not completely reversing, the sound, light, and text are emitted.
  • Various prompts, etc. in order to prompt the user that the four-way valve of the air conditioner is in an abnormal state, thereby facilitating the user to repair the air conditioner in time, and on the other hand, generating and outputting the four-way valve through the signal output device Abnormal signal, so that the air conditioner automatically repairs the four-way valve according to the received four-way valve reversal abnormal signal.
  • An embodiment of the third aspect of the present invention provides a four-way valve fault detecting method, comprising: detecting a temperature of an outdoor heat exchanger and a temperature of an outdoor environment and a user-set working mode; according to the temperature of the outdoor heat exchanger Determining, with the temperature of the outdoor environment, whether the current operating mode of the air conditioner is the same as the working mode set by the user, and if the current operating mode of the air conditioner is different from the working mode set by the user, It is determined that the four-way valve is in the commutation abnormal state, and if the current operation mode of the air conditioner is the same as the operation mode set by the user, it is determined that the four-way valve is in the commutation normal state.
  • the four-way valve fault detecting method can detect the temperature of the outdoor heat exchanger and the temperature of the outdoor environment and the working mode set by the user, thereby being able to be based on the temperature of the outdoor heat exchanger and the outdoor
  • the temperature of the environment determines whether the current operating mode of the air conditioner is the same as the working mode set by the user, so that when the current operating mode of the air conditioner is different from the working mode set by the user, it can be determined that the four-way valve is not changed according to the regulations.
  • the four-way valve is in a reversing abnormal state, and then the user can be notified in time to repair the four-way valve.
  • the four-way can be determined.
  • the valve has been reversing according to the regulations, that is, the four-way valve is in the normal state of commutation, so no treatment can be done.
  • the determining according to the temperature of the outdoor heat exchanger and the temperature of the outdoor environment is: determining whether the temperature of the outdoor heat exchanger is greater than or equal to the temperature of the outdoor environment and the first preset a sum of temperature values, if the temperature of the outdoor heat exchanger is greater than or equal to a sum of a temperature of the outdoor environment and the first preset temperature value, determining a current operating mode of the air conditioner and the user setting Different working modes, if the temperature of the outdoor heat exchanger is less than the sum of the temperature of the outdoor environment and the first preset temperature value, determining a current operating mode of the air conditioner and the user-set The working mode is the same; wherein the first preset temperature value is greater than or equal to a detection error value when detecting the temperature of the outdoor heat exchanger.
  • the air conditioner performs the cooling mode or In the dehumidification mode, the outdoor heat exchanger is equivalent to a condenser, which dissipates the heat in the room to the outdoor environment through the condensation heat of the refrigerant. Therefore, when the temperature of the outdoor heat exchanger is lower than the temperature of the outdoor environment, the air conditioner Only when the cooling mode or the dehumidification mode can be realized, that is, when the air conditioner is in the cooling mode or the dehumidification mode, the temperature of the outdoor heat exchanger must be lower than the outdoor ambient temperature.
  • the working mode set by the user is the cooling mode or the dehumidification mode.
  • the mode if the temperature of the outdoor heat exchanger is higher than or equal to the outdoor ambient temperature, it is inevitable that the current operating mode of the air conditioner is not the cooling mode or the dehumidification mode, that is, the four-way valve is not normally reversing or not completely reversing.
  • the four-way valve has a fault, but considering the detection error when detecting the temperature of the outdoor heat exchanger, therefore, the work set by the user
  • the cooling mode or the dehumidification mode is used, if the temperature of the outdoor heat exchanger is higher or lower than the outdoor ambient temperature, it does not necessarily indicate that the four-way valve is abnormally commutated. Therefore, the four-way provided by the technical solution
  • the valve failure detection method appropriately takes into consideration the detection error when detecting the temperature of the outdoor heat exchanger, thereby preventing the occurrence of a detection error due to the temperature detection error, thereby improving the accuracy of the four-way valve failure detection method.
  • the first preset temperature value is greater than or equal to 1 ° C.
  • the failure detection of the four-way valve In the process, only when the temperature of the outdoor heat exchanger is higher than the outdoor ambient temperature by 1 ° C and above, it can be explained that the four-way valve is not reversing or not completely reversing, thereby avoiding erroneous fault detection due to detection error. In turn, the accuracy of the four-way valve fault detection can be improved.
  • the air conditioner when it is detected that the operating mode set by the user is the heating mode, the air conditioner is determined according to the temperature of the outdoor heat exchanger and the temperature of the outdoor environment. Whether the current operation mode is the same as the working mode set by the user is: determining whether the temperature of the outdoor heat exchanger is less than or equal to the sum of the temperature of the outdoor environment and the second preset temperature value, If the temperature of the outdoor heat exchanger is less than or equal to the sum of the temperature of the outdoor environment and the second preset temperature value, determining that the current operating mode of the air conditioner is different from the working mode set by the user, The temperature of the outdoor heat exchanger is greater than the sum of the temperature of the outdoor environment and the second preset temperature value, determining that the current operating mode of the air conditioner is the same as the working mode set by the user; The second preset temperature value is greater than or equal to a detection error value when detecting the temperature of the outdoor heat exchanger.
  • the outdoor heat exchanger when the working mode set by the user is the heating mode, the outdoor heat exchanger continuously transfers heat to the room through the evaporation heat absorption of the refrigerant, that is, the outdoor heat exchanger continuously draws from the outdoor environment.
  • the heat is such that the temperature of the outdoor heat exchanger is higher than the temperature of the outdoor environment.
  • the operating mode set by the user is the heating mode
  • the temperature of the outdoor heat exchanger is lower than or equal to the outdoor ambient temperature
  • the current operating mode of the air conditioner is not the heating mode, so that it can be determined that the four-way valve is not reversing or not completely reversing, that is, the four-way valve is in an abnormal state, but the detection when detecting the temperature of the outdoor heat exchanger is also considered.
  • the four-way valve fault detection method provided by the technical solution also appropriately considers the error of the temperature detection, thereby preventing the occurrence of detection errors due to the temperature detection error. , Thereby improving the accuracy of the fault detection method of the four-way valve.
  • the second preset temperature value is greater than or equal to 1 ° C.
  • the existing air conditioner when the temperature of the outdoor heat exchanger is detected, there is generally a positive or negative deviation of 1 ° C. Therefore, in the heating mode, the fault detection of the four-way valve is in progress. Only when the temperature of the outdoor heat exchanger is 1 ° C lower than the outdoor ambient temperature and more can the four-way valve not be reversing or not completely reversing, so as to avoid erroneous fault detection due to detection error, and then Improve the accuracy of four-way valve fault detection.
  • the four-way valve fault detecting method further includes: determining whether a current condition of the air conditioner meets a preset condition; and determining that a current condition of the air conditioner meets a preset And the step of detecting the temperature of the outdoor heat exchanger and the temperature of the outdoor environment and the working mode set by the user; wherein the preset condition includes at least one of the following conditions: the running time of the air conditioner is greater than Equal to the predetermined running time; the current operating mode of the air conditioner is non-automatic The current mode of operation of the air conditioner is a non-supply operation mode; the current operation mode of the air conditioner is a non-defrost mode, and the air conditioner is separated from the defrost end time by a preset time.
  • the current condition of the air conditioner is judged, and the fault determination is performed only when the current condition of the air conditioner satisfies the preset condition, thereby preventing misjudgment and further improving the four-way valve failure.
  • the accuracy of the test method is performed only when the current condition of the air conditioner satisfies the preset condition, thereby preventing misjudgment and further improving the four-way valve failure.
  • the air conditioner's operation mode is the automatic operation mode, since the air conditioner itself adjusts the working mode from time to time, it is not suitable for the four-way valve fault detection at this time.
  • the method detects the fault of the four-way valve.
  • the air conditioner when the air conditioner is in the air supply mode, the compressor is not running, and the air conditioner does not perform the corresponding cooling mode or heating mode, therefore, the outdoor heat exchanger and the outdoor environment There is no temperature difference between them, and therefore, it is not suitable to use this method for fault detection of the four-way valve.
  • the four-way valve failure detecting method further comprises: after the determining that the four-way valve is in a commutation abnormal state, outputting a four-way valve commutation abnormality signal.
  • an alarm output device such as an alarm device or a display screen
  • it is determined that the four-way valve is in a reversing abnormal state that is, after the reversing or not completely reversing, the sound, light, and text are emitted.
  • Various prompts, etc. in order to prompt the user that the four-way valve of the air conditioner is in an abnormal state, thereby facilitating the user to repair the air conditioner in time, and on the other hand, generating and outputting the four-way valve through the signal output device Abnormal signal, so that the air conditioner automatically repairs the four-way valve according to the received four-way valve reversal abnormal signal.
  • An embodiment of the fourth aspect of the present invention provides a four-way valve fault detecting apparatus for an air conditioner, comprising: detecting means for detecting a temperature of an indoor heat exchanger and a temperature of an indoor environment and a user setting a working mode, configured to determine, according to a temperature of the indoor heat exchanger and a temperature of the indoor environment, whether a current operating mode of the air conditioner is the same as a working mode set by the user, and When the current operation mode of the air conditioner is different from the operation mode set by the user, it is determined that the four-way valve is in a commutation abnormal state, and when the current operation mode of the air conditioner is the same as the operation mode set by the user, It is determined that the four-way valve is in a commutating normal state.
  • the four-way valve fault detecting device can detect the temperature of the indoor heat exchanger and the temperature of the indoor environment and the working mode set by the user, thereby being able to be based on the temperature of the indoor heat exchanger and the indoor
  • the temperature of the environment determines whether the current operating mode of the air conditioner is the same as the working mode set by the user, so that when the current operating mode of the air conditioner is different from the working mode set by the user, it can be determined that the four-way valve is not changed according to the regulations.
  • the four-way valve is in a reversing abnormal state, and then the user can be notified in time to repair the four-way valve.
  • the four-way can be determined.
  • the valve has been reversing according to the regulations, that is, the four-way valve is in the normal state of commutation, so no treatment can be done.
  • the processing device is configured to determine whether the temperature of the indoor heat exchanger is determined when the detecting device detects that the operating mode set by the user is a cooling mode or a humidifying mode And greater than or equal to a sum of a temperature of the indoor environment and a first preset temperature value, and when the temperature of the indoor heat exchanger is greater than or equal to a sum of a temperature of the indoor environment and the first preset temperature value, determining The current operating mode of the air conditioner is different from the working mode set by the user, and when the temperature of the indoor heat exchanger is less than the sum of the temperature of the indoor environment and the first preset temperature value, The current operating mode of the air conditioner is the same as the working mode set by the user; wherein the first preset temperature value is greater than or equal to a detection error value when detecting the temperature of the indoor heat exchanger.
  • the process of determining the failure of the four-way valve by using the temperature of the indoor heat exchanger and the temperature of the indoor environment is different, specifically, cooling or pumping in the air conditioner.
  • the indoor heat exchanger is equivalent to an evaporator, in which the refrigerant generates heat after evaporation and heat absorption, and the amount of cold produced can only be transferred to the room through heat transfer. Therefore, the indoor cooling capacity is derived from Indoor heat exchanger, according to the law of energy transmission, the temperature of the indoor heat exchanger must be lower than the indoor ambient temperature.
  • the user-set working mode is the cooling mode or the dehumidification mode
  • the indoor heat exchanger The temperature of the air conditioner is higher than or equal to the indoor ambient temperature. It is inevitable that the current operating mode of the air conditioner is not the cooling mode or the dehumidification mode, that is, the four-way valve is not normally reversing or not completely reversing, and thus It can be determined that the four-way valve has a fault, but considering the detection error when detecting the temperature of the indoor heat exchanger, if the operating mode set by the user is the cooling mode or the dehumidification mode, if the temperature of the indoor heat exchanger The higher or lower than the indoor ambient temperature, it does not necessarily explain the four-way valve commutation abnormality. Therefore, the four-way valve fault detection method provided by the technical solution appropriately considers the temperature of the indoor heat exchanger when detecting The detection error can prevent the occurrence of false detection due to the temperature detection error, thereby improving the accuracy of the four-way valve failure detection method.
  • the first preset temperature value is greater than or equal to 1 ° C.
  • the failure detection of the four-way valve In the process, only when the temperature of the indoor heat exchanger is higher than 1 °C of the indoor ambient temperature, the four-way valve is not reversing or not completely reversing, so that the fault detection caused by the detection error can be avoided, and then It can improve the accuracy of four-way valve fault detection.
  • the processing device is configured to determine, when the detecting device detects that the working mode set by the user is a heating mode, whether the temperature of the indoor heat exchanger is less than or equal to Determining the temperature of the indoor environment and the second preset temperature value, and determining that the air conditioner is when the temperature of the indoor heat exchanger is less than or equal to a temperature of the indoor environment and the second preset temperature value
  • the current operation mode of the device is different from the operation mode set by the user, and when the temperature of the indoor heat exchanger is greater than the sum of the temperature of the indoor environment and the second preset temperature value, determining the air conditioner
  • the current operating mode of the device is the same as the working mode set by the user; wherein the second preset temperature value is greater than or equal to a detection error value when detecting the temperature of the indoor heat exchanger.
  • the working mode set by the user when the working mode set by the user is the heating mode, the heat of the indoor environment is derived from the indoor heat exchanger, and therefore, the temperature of the indoor heat exchanger is necessarily higher than the temperature of the indoor environment, and therefore,
  • the working mode set by the user is the heating mode, if the temperature of the indoor heat exchanger is lower than or equal to the indoor ambient temperature, it is inevitable that the current operating mode of the air conditioner is not the heating mode, so that the four-way valve can be determined. If the four-way valve is in an abnormal state, the detection error of the indoor heat exchanger is also considered.
  • the temperature of the heat exchanger is higher or lower than the indoor ambient temperature, which does not necessarily indicate the abnormality of the four-way valve. Therefore, the four-way valve fault detection method provided by the technical solution also appropriately considers the temperature detection. Error, which prevents the occurrence of false detection due to temperature detection errors Health, and thus improve the accuracy of the four-way valve fault detection method.
  • the second preset temperature value is greater than or equal to 1 ° C.
  • the failure detection of the four-way valve is in progress. Only when the temperature of the indoor heat exchanger is lower than 1 °C of the indoor ambient temperature, the four-way valve is not reversing or not completely reversing, so that the fault detection caused by the detection error can be avoided, thereby improving the fourth The accuracy of the valve fault detection.
  • the processing device is further configured to determine whether a current condition of the air conditioner meets a preset condition, and when the current condition of the air conditioner meets a preset condition, the control detecting device detects the indoor heat exchange The temperature of the device and the temperature of the indoor environment and the operating mode set by the user; wherein the preset condition includes at least one of the following conditions: the running time of the air conditioner is greater than or equal to a predetermined running time; the current running of the air conditioner The mode is a non-automatic operation mode; the current operation mode of the air conditioner is a non-supply operation mode; the current operation mode of the air conditioner is a non-defrosting mode, and the air conditioner is separated from the defrost end time by a preset time. .
  • the current condition of the air conditioner is judged, and the fault determination is performed only when the current condition of the air conditioner satisfies the preset condition, thereby preventing misjudgment and further improving the four-way valve failure.
  • the accuracy of the test method Specifically, for example, when the air conditioner is just running, the amount of cooling or the amount of heat generated by the air conditioner is still very small, and therefore, it is insufficient to cause a temperature difference between the indoor heat exchanger and the indoor environment, and therefore, in this case,
  • the four-way valve fault detection method to detect the fault of the four-way valve, it is easy to detect the fault, so that the four-way valve fault detection can be improved after the air conditioner running time is greater than or equal to the preset time.
  • the accuracy of the fault detection method in the same way, when the operation mode of the air conditioner is the automatic operation mode, since the air conditioner itself adjusts the working mode at a time, it is not suitable to use the four-way valve fault detection method at this time.
  • the valve is used for fault detection.
  • the air conditioner when the air conditioner is in the air supply mode, the compressor is not running. At this time, the air conditioner does not perform corresponding cooling or heating. Therefore, there is no temperature between the indoor heat exchanger and the indoor environment. Poor, and therefore, it is not suitable to use this method for fault detection of a four-way valve.
  • the four-way valve fault detection method to detect the fault of the four-way valve, because the essence of defrosting is to adjust the working mode of the air conditioner to Heating mode, therefore, during the defrosting period or shortly after the defrosting, the indoor heat exchanger will be caused by the change of the working mode of the air conditioner. The temperature and the temperature of the indoor environment are changed. Therefore, it is not possible to determine the abnormality of the four-way valve commutation simply based on the difference between the temperature of the indoor heat exchanger and the temperature of the indoor environment.
  • the four-way valve failure detecting device further includes: an output device, configured to output a four-way valve commutation abnormality after the processing device determines that the four-way valve is in a commutation abnormal state signal.
  • an alarm output device such as an alarm device or a display screen
  • it is determined that the four-way valve is in a reversing abnormal state that is, after the reversing or not completely reversing, the sound, light, and text are emitted.
  • Various prompts, etc. in order to prompt the user that the four-way valve of the air conditioner is in an abnormal state, thereby facilitating the user to repair the air conditioner in time, and on the other hand, generating and outputting the four-way valve through the signal output device Abnormal signal, so that the air conditioner automatically repairs the four-way valve according to the received four-way valve reversal abnormal signal.
  • An embodiment of the fifth aspect of the present invention provides a four-way valve fault detecting apparatus for an air conditioner, comprising: detecting means for detecting a temperature of an indoor heat exchanger and a temperature of an outdoor heat exchanger and a user setting a working mode, configured to determine, according to a temperature of the indoor heat exchanger and a temperature of the outdoor heat exchanger, whether a current operating mode of the air conditioner is the same as a working mode set by the user, and When the current operating mode of the air conditioner is different from the working mode set by the user, determining that the four-way valve is in a commutation abnormal state, and that the current operating mode of the air conditioner is opposite to the working mode set by the user At the same time, it is determined that the four-way valve is in a normal commutation state.
  • the four-way valve fault detecting device provided by the embodiment of the fifth aspect of the present invention can detect the temperature of the indoor heat exchanger by detecting the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger and the user-set working mode. And the temperature of the outdoor heat exchanger determines whether the current operating mode of the air conditioner is the same as the working mode set by the user, so that when the current operating mode of the air conditioner is different from the working mode set by the user, the four-way valve can be determined. If the four-way valve is in the direction of commutation abnormality, the user can be notified to the four-way valve in time.
  • the processing device is configured to determine whether the temperature of the indoor heat exchanger is determined when the detecting device detects that the operating mode set by the user is a cooling mode or a humidifying mode Is greater than or equal to the temperature of the outdoor heat exchanger, and the temperature of the indoor heat exchanger is greater than or equal to
  • the temperature of the outdoor heat exchanger is described, it is determined that the current operating mode of the air conditioner is different from the operating mode set by the user, and when the temperature of the indoor heat exchanger is less than the temperature of the outdoor heat exchanger, It is determined that the current operating mode of the air conditioner is the same as the operating mode set by the user.
  • the process of determining the fault of the four-way valve by using the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger is different, specifically, cooling is performed in the air conditioner.
  • the indoor heat exchanger is an evaporator
  • the outdoor heat exchanger is a condenser, so that the refrigerant will continuously evaporate and absorb heat in the indoor heat exchanger and continuously condense heat in the outdoor heat exchanger.
  • the heat in the room is continuously released to the outside to achieve the purpose of cooling mode or dehumidification mode.
  • the temperature of the indoor heat exchanger must be lower than the temperature of the outdoor heat exchanger. Therefore, the working mode set by the user is the cooling mode or pumping.
  • the wet mode if the temperature of the indoor heat exchanger is higher than or equal to the temperature of the outdoor heat exchanger, it is inevitable that the current operating mode of the air conditioner is not the cooling mode or the dehumidification mode, that is, the four-way valve is not normally reversed or If the steering is not completely reversed, it can be determined that the four-way valve has a commutation fault.
  • the processing device is configured to determine, when the detecting device detects that the working mode set by the user is a heating mode, whether the temperature of the indoor heat exchanger is less than or equal to Determining the temperature of the outdoor heat exchanger, and determining that the current operating mode of the air conditioner is different from the operating mode set by the user when the temperature of the indoor heat exchanger is less than or equal to the temperature of the outdoor heat exchanger, And when the temperature of the indoor heat exchanger is greater than the temperature of the outdoor heat exchanger, determining that the current operating mode of the air conditioner is the same as the working mode set by the user.
  • the refrigerant in the outdoor heat exchanger evaporates and absorbs heat, and then the heat source is continuously delivered to the indoor heat exchanger, thereby transferring heat through heat transfer. Dissipated into the room, therefore, the temperature of the indoor heat exchanger must be higher than the temperature of the outdoor heat exchanger.
  • the operating mode set by the user is the heating mode
  • the temperature of the indoor heat exchanger is still lower than or equal to the outdoor
  • the temperature of the heat exchanger is inevitable that the current operating mode of the air conditioner is not the heating mode, so that it can be determined that the four-way valve is not reversing or not completely reversing, that is, the four-way valve is in a commutation abnormal state.
  • the processing device is further configured to determine whether a current condition of the air conditioner meets a preset condition, and when the current condition of the air conditioner meets a preset condition, control
  • the detecting device detects the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger and the working mode set by the user; wherein the preset condition includes at least one of the following conditions: the running time of the air conditioner And greater than or equal to a predetermined running time; the current operating mode of the air conditioner is a non-automatic operating mode; the current operating mode of the air conditioner is a non-airing operating mode; the current operating mode of the air conditioner is a non-defrosting mode, and The air conditioner is separated from the defrosting end time by a preset time.
  • the current condition of the air conditioner is judged, and the fault determination is performed only when the current condition of the air conditioner satisfies the preset condition, thereby preventing misjudgment and further improving the four-way valve failure.
  • the accuracy of the test method Specifically, for example, when the air conditioner is just running, the amount of the cooling mode or the heating mode generated by the air conditioner is still very small, and therefore, it is insufficient to cause a temperature difference between the indoor heat exchanger and the outdoor heat exchanger, and therefore, In this case, if the four-way valve fault detection method is used to detect the fault of the four-way valve, it is easy to detect the error, and then the four-way valve is performed after the running time of the air conditioner is greater than or equal to the preset time.
  • Fault detection can improve the accuracy of the four-way valve fault detection method.
  • the air conditioner's operation mode is the automatic operation mode, since the air conditioner itself adjusts the working mode, it is not suitable for use at this time.
  • the valve detection method detects the fault of the four-way valve.
  • the air conditioner is in the air supply mode, the compressor is not running. At this time, the air conditioner does not perform the corresponding cooling mode or heating mode. Therefore, the indoor heat exchange There is also no temperature difference between the heater and the outdoor heat exchanger, and therefore, it is not suitable to use this method for fault detection of the four-way valve.
  • the four-way valve fault detection method to detect the fault of the four-way valve, because the essence of defrosting is to adjust the working mode of the air conditioner to Heating mode, therefore, during the defrosting period or shortly after the defrosting, the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger change due to the change of the operating mode of the air conditioner, so It is not possible to determine the abnormality of the four-way valve commutation simply based on the temperature difference between the temperature of the indoor heat exchanger and the outdoor heat exchanger.
  • the four-way valve failure detecting device further includes: an output device, configured to output a four-way valve commutation abnormality after the processing device determines that the four-way valve is in a commutation abnormal state signal.
  • an alarm output device such as an alarm device or a display screen
  • it is determined that the four-way valve is in a reversing abnormal state that is, after the reversing or not completely reversing, the sound, light, and text are emitted.
  • Various prompts, etc. in order to prompt the user that the four-way valve of the air conditioner is in an abnormal state, thereby facilitating the user to repair the air conditioner in time, and on the other hand, generating and outputting the four-way valve through the signal output device Abnormal signal, so that the air conditioner can reverse the signal according to the received four-way valve to the four-way The valve is automatically repaired.
  • An embodiment of the sixth aspect of the present invention provides a four-way valve fault detecting apparatus for an air conditioner, comprising: detecting means for detecting the temperature of the outdoor heat exchanger and the temperature of the outdoor environment and the working mode set by the user a processing device, configured to determine, according to a temperature of the outdoor heat exchanger and a temperature of the outdoor environment, whether a current operating mode of the air conditioner is the same as a working mode set by the user, and in the air conditioner When the current operation mode is different from the operation mode set by the user, it is determined that the four-way valve is in a commutation abnormal state, and when the current operation mode of the air conditioner is the same as the operation mode set by the user, the determination is performed.
  • the four-way valve is in a normal state of commutation.
  • the four-way valve fault detecting device can detect the temperature of the outdoor heat exchanger and the outdoor heat source by detecting the temperature of the outdoor heat exchanger and the temperature of the outdoor environment and the working mode set by the user.
  • the temperature of the environment determines whether the current operating mode of the air conditioner is the same as the working mode set by the user, so that when the current operating mode of the air conditioner is different from the working mode set by the user, it can be determined that the four-way valve is not changed according to the regulations.
  • the four-way valve is in a reversing abnormal state, and then the user can be notified in time to repair the four-way valve.
  • the four-way can be determined.
  • the valve has been reversing according to the regulations, that is, the four-way valve is in the normal state of commutation, so no treatment can be done.
  • the processing device is configured to determine whether the temperature of the outdoor heat exchanger is when the detecting device detects that the operating mode set by the user is a cooling mode or a humidifying mode And greater than or equal to a sum of a temperature of the outdoor environment and a first preset temperature value, and determining when the temperature of the outdoor heat exchanger is greater than or equal to a sum of a temperature of the outdoor environment and the first preset temperature value
  • the current operating mode of the air conditioner is different from the working mode set by the user, and when the temperature of the outdoor heat exchanger is less than the sum of the temperature of the outdoor environment and the first preset temperature value,
  • the current operating mode of the air conditioner is the same as the working mode set by the user; wherein the first preset temperature value is greater than or equal to a detection error value when detecting the temperature of the outdoor heat exchanger.
  • the air conditioner performs the cooling mode or In the dehumidification mode
  • the outdoor heat exchanger is equivalent to a condenser, which dissipates the heat in the room to the outdoor environment through the condensation heat of the refrigerant. Therefore, when the temperature of the outdoor heat exchanger is lower than the temperature of the outdoor environment, the air conditioner Only in the cooling mode or dehumidification mode, that is, the air conditioner cooling mode or In the dehumidification mode, the temperature of the outdoor heat exchanger must be lower than the outdoor ambient temperature.
  • the operating mode set by the user is the cooling mode or the dehumidification mode
  • the temperature of the outdoor heat exchanger is higher than or equal to the outdoor temperature Ambient temperature
  • the current operating mode of the air conditioner is not the cooling mode or the dehumidification mode, that is, the four-way valve is not normally reversing or not completely reversing, and then it can be determined that the four-way valve has failed, but considering The detection error when detecting the temperature of the outdoor heat exchanger, therefore, when the operating mode set by the user is the cooling mode or the dehumidification mode, if the temperature of the outdoor heat exchanger is higher or lower than the outdoor ambient temperature, It is not always possible to explain the abnormality of the four-way valve commutation.
  • the four-way valve fault detection method provided by the technical solution appropriately takes into consideration the detection error when detecting the temperature of the outdoor heat exchanger, thereby preventing the temperature detection error from being caused.
  • the occurrence of a detection error occurs, which improves the accuracy of the four-way valve failure detection method.
  • the first preset temperature value is greater than or equal to 1 ° C.
  • the failure detection of the four-way valve In the process, only when the temperature of the outdoor heat exchanger is higher than the outdoor ambient temperature by 1 ° C and above, it can be explained that the four-way valve is not reversing or not completely reversing, thereby avoiding erroneous fault detection due to detection error. In turn, the accuracy of the four-way valve fault detection can be improved.
  • the processing device is configured to determine, when the detecting device detects that the working mode set by the user is a heating mode, whether the temperature of the outdoor heat exchanger is less than or equal to Determining the temperature of the outdoor environment and the second preset temperature value, and determining that the air conditioner is when the temperature of the outdoor heat exchanger is less than or equal to a temperature of the outdoor environment and the second preset temperature value
  • the current operating mode of the device is different from the working mode set by the user, and when the temperature of the outdoor heat exchanger is greater than the sum of the temperature of the outdoor environment and the second preset temperature value, determining the air conditioner
  • the current operating mode of the device is the same as the working mode set by the user; wherein the second preset temperature value is greater than or equal to a detection error value when detecting the temperature of the outdoor heat exchanger.
  • the outdoor heat exchanger when the working mode set by the user is the heating mode, the outdoor heat exchanger continuously transfers heat to the room through the evaporation heat absorption of the refrigerant, that is, the outdoor heat exchanger continuously draws from the outdoor environment.
  • the heat is such that the temperature of the outdoor heat exchanger is higher than the temperature of the outdoor environment.
  • the four-way valve when the operating mode set by the user is the heating mode, if the temperature of the outdoor heat exchanger is lower than or equal to the outdoor ambient temperature, it is inevitable that The current operating mode of the air conditioner is not the heating mode, so that the four-way valve can be determined
  • the second preset temperature value is greater than or equal to 1 ° C.
  • the existing air conditioner when the temperature of the outdoor heat exchanger is detected, there is generally a positive or negative deviation of 1 ° C. Therefore, in the heating mode, the fault detection of the four-way valve is in progress. Only when the temperature of the outdoor heat exchanger is 1 ° C lower than the outdoor ambient temperature and more can the four-way valve not be reversing or not completely reversing, so as to avoid erroneous fault detection due to detection error, and then Improve the accuracy of four-way valve fault detection.
  • the processing device is further configured to determine whether the current condition of the air conditioner meets a preset condition, and when the current condition of the air conditioner meets the preset condition, the control detecting device detects the outdoor heat exchange The temperature of the device and the temperature of the outdoor environment and the operating mode set by the user; wherein the preset condition comprises at least one of the following conditions: the running time of the air conditioner is greater than or equal to a predetermined running time; the current running of the air conditioner The mode is a non-automatic operation mode; the current operation mode of the air conditioner is a non-supply operation mode; the current operation mode of the air conditioner is a non-defrosting mode, and the air conditioner is separated from the defrost end time by a preset time. .
  • the current condition of the air conditioner is judged, and the fault determination is performed only when the current condition of the air conditioner satisfies the preset condition, thereby preventing misjudgment and further improving the four-way valve failure.
  • the accuracy of the test method is performed only when the current condition of the air conditioner satisfies the preset condition, thereby preventing misjudgment and further improving the four-way valve failure.
  • the air conditioner's operation mode is the automatic operation mode, since the air conditioner itself adjusts the working mode from time to time, it is not suitable for the four-way valve fault detection at this time.
  • the method detects the fault of the four-way valve.
  • the air conditioner is in the air supply mode, the compressor is not running, and the air conditioner is The corresponding cooling mode or heating mode is not performed, so there is no temperature difference between the outdoor heat exchanger and the outdoor environment, and therefore, it is not suitable to use the method for fault detection of the four-way valve.
  • the four-way valve failure detecting device further includes: an output device, configured to output a four-way valve commutation abnormality after the processing device determines that the four-way valve is in a commutation abnormal state signal.
  • an alarm output device such as an alarm device or a display screen
  • it is determined that the four-way valve is in a reversing abnormal state that is, after the reversing or not completely reversing, the sound, light, and text are emitted.
  • Various prompts, etc. in order to prompt the user that the four-way valve of the air conditioner is in an abnormal state, thereby facilitating the user to repair the air conditioner in time, and on the other hand, generating and outputting the four-way valve through the signal output device Abnormal signal, so that the air conditioner automatically repairs the four-way valve according to the received four-way valve reversal abnormal signal.
  • An embodiment of the seventh aspect of the present invention provides an air conditioner comprising the four-way valve fault detecting apparatus according to any one of the fourth aspect, the fifth aspect, and the sixth aspect.
  • the air conditioner provided by the embodiment of the seventh aspect of the present invention includes the four-way valve fault detecting device provided by any of the above embodiments, and therefore has the beneficial effects of the four-way valve fault detecting device provided by any of the above embodiments. I will not repeat them here.
  • FIG. 1 is a flow chart showing a four-way valve failure detecting method according to an embodiment of the present invention
  • FIG. 2 is a flow chart showing another flow of a four-way valve failure detecting method according to an embodiment of the present invention
  • FIG. 3 is a schematic flow chart showing a four-way valve failure detecting method according to an embodiment of the present invention.
  • FIG. 4 is a flow chart showing a four-way valve failure detecting method according to another embodiment of the present invention.
  • FIG. 5 is a flow chart showing another flow of a four-way valve failure detecting method according to another embodiment of the present invention.
  • FIG. 6 is a schematic flow chart showing another method of detecting a four-way valve fault according to another embodiment of the present invention.
  • FIG. 7 is a flow chart showing a four-way valve failure detecting method according to still another embodiment of the present invention.
  • FIG. 8 is a flow chart showing another flow of a four-way valve failure detecting method according to still another embodiment of the present invention.
  • FIG. 9 is a flow chart showing still another flow of a four-way valve failure detecting method according to still another embodiment of the present invention.
  • Figure 10 is a block diagram showing the structure of a four-way valve malfunctioning device according to an embodiment of the present invention.
  • Figure 11 is a block diagram showing the structure of a four-way valve malfunctioning device according to another embodiment of the present invention.
  • Figure 12 is a block diagram showing the structure of a four-way valve malfunctioning device according to still another embodiment of the present invention.
  • Figure 13 is a block diagram showing the structure of an air conditioner according to an embodiment of the present invention.
  • Figure 14 is a block diagram showing the structure of an air conditioner according to another embodiment of the present invention.
  • Fig. 15 is a block diagram showing the structure of an air conditioner according to still another embodiment of the present invention.
  • a four-way valve fault detection method in accordance with some embodiments of the present invention is described below with reference to FIG.
  • the embodiment of the first aspect of the present invention provides a method for detecting a four-way valve fault, as shown in FIG. 1 , comprising: step 102, detecting a temperature of an indoor heat exchanger and a temperature of an indoor environment and a working mode set by a user; Step 104: Determine, according to the temperature of the indoor heat exchanger and the temperature of the indoor environment, whether the current operating mode of the air conditioner is the same as the working mode set by the user, if the current operating mode of the air conditioner Different from the working mode set by the user, determining that the four-way valve is in a commutation abnormal state, if the current operating mode of the air conditioner is the same as the working mode set by the user, determining that the four-way valve is in Switch to normal state.
  • the four-way valve fault detecting method can detect the temperature of the indoor heat exchanger and the temperature of the indoor environment and the working mode set by the user, thereby being able to be based on the temperature of the indoor heat exchanger and the indoor
  • the temperature of the environment determines whether the current operating mode of the air conditioner is the same as the working mode set by the user, so that when the current operating mode of the air conditioner is different from the working mode set by the user, it can be determined that the four-way valve is not changed according to the regulations.
  • the four-way valve is in a reversing abnormal state, and then the user can be notified in time to repair the four-way valve.
  • the four-way can be determined.
  • the valve has been reversing according to the regulations, that is, the four-way valve is in the normal state of commutation, so no treatment can be done.
  • the determining according to the temperature of the indoor heat exchanger and the temperature of the indoor environment is: determining whether the temperature of the indoor heat exchanger is greater than or equal to the temperature of the indoor environment and the first preset temperature value.
  • determining if the temperature of the indoor heat exchanger is greater than or equal to a sum of a temperature of the indoor environment and the first preset temperature value, determining a current operating mode of the air conditioner and a working mode set by the user Differently, if the temperature of the indoor heat exchanger is less than the sum of the temperature of the indoor environment and the first preset temperature value, determining that the current operating mode of the air conditioner is the same as the working mode set by the user Wherein the first preset temperature value is greater than or equal to detecting when detecting the temperature of the indoor heat exchanger difference.
  • the process of determining the failure of the four-way valve by using the temperature of the indoor heat exchanger and the temperature of the indoor environment is different, specifically, cooling or pumping in the air conditioner.
  • the indoor heat exchanger is equivalent to an evaporator, in which the refrigerant generates heat after evaporation and heat absorption, and the amount of cold produced can only be transferred to the room through heat transfer. Therefore, the indoor cooling capacity is derived from Indoor heat exchanger, according to the law of energy transmission, the temperature of the indoor heat exchanger must be lower than the indoor ambient temperature.
  • the user-set working mode is the cooling mode or the dehumidification mode
  • the indoor heat exchanger The temperature is still higher than or equal to the indoor ambient temperature, it is inevitable that the current operating mode of the air conditioner is not the cooling mode or the dehumidification mode, that is, the four-way valve is not normally reversing or not completely reversing, and then the four-way can be determined.
  • the valve has a fault, but considering the detection error when detecting the temperature of the indoor heat exchanger, if the user sets the working mode to the cooling mode or the dehumidification mode, if the indoor change The temperature of the device is higher or lower than the indoor ambient temperature, which does not necessarily indicate the abnormality of the four-way valve. Therefore, the four-way valve fault detection method provided by the technical solution appropriately considers the detection of the indoor heat exchanger.
  • the detection error at the temperature prevents the occurrence of false detection due to the temperature detection error, thereby improving the accuracy of the four-way valve failure detection method.
  • the first preset temperature value is greater than or equal to 1 ° C.
  • the failure detection of the four-way valve In the process, only when the temperature of the indoor heat exchanger is higher than 1 °C of the indoor ambient temperature, the four-way valve is not reversing or not completely reversing, so that the fault detection caused by the detection error can be avoided, and then It can improve the accuracy of four-way valve fault detection.
  • the air conditioner when it is detected that the working mode set by the user is the heating mode, the air conditioner is determined according to the temperature of the indoor heat exchanger and the temperature of the indoor environment. Whether the current operating mode is the same as the working mode set by the user is: determining whether the temperature of the indoor heat exchanger is less than or equal to the sum of the temperature of the indoor environment and the second preset temperature value, If the temperature of the indoor heat exchanger is less than or equal to the sum of the temperature of the indoor environment and the second preset temperature value, determining that the current operating mode of the air conditioner is different from the working mode set by the user, The temperature of the indoor heat exchanger is greater than the sum of the temperature of the indoor environment and the second preset temperature value, determining that the current operating mode of the air conditioner is the same as the working mode set by the user; The second preset temperature value is greater than or equal to a detection error value when detecting the temperature of the indoor heat exchanger.
  • the working mode set by the user when the working mode set by the user is the heating mode, the heat of the indoor environment is derived from the indoor heat exchanger, and therefore, the temperature of the indoor heat exchanger is necessarily higher than the temperature of the indoor environment, and therefore,
  • the working mode set by the user is the heating mode, if the temperature of the indoor heat exchanger is lower than or equal to the indoor ambient temperature, it is inevitable that the current operating mode of the air conditioner is not the heating mode, so that the four-way valve can be determined. If the four-way valve is in an abnormal state, the detection error of the indoor heat exchanger is also considered.
  • the temperature of the heat exchanger is higher or lower than the indoor ambient temperature, which does not necessarily indicate the abnormality of the four-way valve. Therefore, the four-way valve fault detection method provided by the technical solution also appropriately considers the temperature detection.
  • the error can prevent the occurrence of false detection due to the temperature detection error, thereby improving the accuracy of the four-way valve fault detection method.
  • the second preset temperature value is greater than or equal to 1 ° C.
  • the failure detection of the four-way valve is in progress. Only when the temperature of the indoor heat exchanger is lower than 1 °C of the indoor ambient temperature, the four-way valve is not reversing or not completely reversing, so that the fault detection caused by the detection error can be avoided, thereby improving the fourth The accuracy of the valve fault detection.
  • the four-way valve fault detecting method further includes: determining whether a current condition of the air conditioner meets a preset condition; and determining that a current condition of the air conditioner meets a preset In the condition, the step of detecting the temperature of the indoor heat exchanger and the temperature of the indoor environment and the working mode set by the user is performed; wherein the preset condition includes at least one of the following conditions: the running time of the air conditioner is greater than Equivalent to a predetermined running time; the current operating mode of the air conditioner is a non-automatic operating mode; the current operating mode of the air conditioner is a non-supply operating mode; the current operating mode of the air conditioner is a non-defrosting mode, and The air conditioner is separated from the defrosting end time by a preset time.
  • the four-way valve fault detection method is as shown in FIG. 2, and includes:
  • Step 202 Determine whether the current condition of the air conditioner meets the preset condition, and when the current condition that the air conditioner is located meets the preset condition, perform step 204, and vice versa, where the air conditioner is located. When the current condition does not meet the preset condition, the four-way valve is not detected for failure.
  • Step 204 detecting the temperature of the indoor heat exchanger and the temperature of the indoor environment and the working mode set by the user. formula.
  • Step 206 Determine, according to the temperature of the indoor heat exchanger and the temperature of the indoor environment, whether the current operating mode of the air conditioner is the same as the working mode set by the user, if the current operating mode of the air conditioner Different from the working mode set by the user, it is determined that the four-way valve is in a commutation abnormal state, and vice versa, if the current operating mode of the air conditioner is the same as the working mode set by the user, determining the four-way The valve is in the normal state of commutation and ends the fault detection of the four-way valve.
  • the technical solution judges the current condition of the air conditioner, and only determines whether the current condition of the air conditioner meets the preset condition, thereby preventing the misjudgment, thereby improving the fault detection method of the four-way valve. accuracy. Specifically, for example, when the air conditioner is just running, the amount of cooling or the amount of heat generated by the air conditioner is still very small, and therefore, it is insufficient to cause a temperature difference between the indoor heat exchanger and the indoor environment, and therefore, in this case, By using the four-way valve fault detection method to detect the fault of the four-way valve, it is easy to detect the fault, so that the four-way valve fault detection can be improved after the air conditioner running time is greater than or equal to the preset time.
  • the accuracy of the fault detection method in the same way, when the operation mode of the air conditioner is the automatic operation mode, since the air conditioner itself adjusts the working mode at a time, it is not suitable to use the four-way valve fault detection method at this time.
  • the valve is used for fault detection.
  • the air conditioner when the air conditioner is in the air supply mode, the compressor is not running. At this time, the air conditioner does not perform corresponding cooling or heating. Therefore, there is no temperature between the indoor heat exchanger and the indoor environment. Poor, and therefore, it is not suitable to use this method for fault detection of a four-way valve.
  • the four-way valve fault detection method to detect the fault of the four-way valve, because the essence of defrosting is to adjust the working mode of the air conditioner to Heating mode, therefore, during the defrosting period or shortly after the defrosting, the temperature of the indoor heat exchanger and the temperature of the indoor environment will change due to the change of the operating mode of the air conditioner. Therefore, It is possible to determine the abnormality of the four-way valve commutation simply based on the difference between the temperature of the indoor heat exchanger and the temperature of the indoor environment.
  • the four-way valve failure detecting method further comprises: after the determining that the four-way valve is in a commutation abnormal state, outputting a four-way valve commutation abnormality signal.
  • the four-way valve is in a reversing abnormal state, that is, after the reversing or not completely reversing, the sound, light, and text are emitted.
  • Various prompts, etc. in order to prompt the user that the four-way valve of the air conditioner is in an abnormal state, thereby facilitating the user to repair the air conditioner in time, and on the other hand, generating and transmitting through the signal output device.
  • the four-way valve reverses the abnormal signal, so that the air conditioner automatically repairs the four-way valve according to the received four-way valve reverse abnormal signal.
  • Step 301 determining whether the current condition of the air conditioner meets a preset condition. The process proceeds to step 302. If not, the determination is directly ended. In step 302, the temperature of the indoor heat exchanger and the temperature of the indoor environment and the working mode set by the user are detected. If the working mode set by the user is detected as the cooling mode or pumping In the wet mode, go to step 303.
  • step 304 determines whether the temperature T2 of the indoor heat exchanger is greater than or equal to the temperature T1 of the indoor environment and the first pre- Set the sum of the temperature values a ° C, if T2 ⁇ T1 + a ° C, then go to step 305, if T2 ⁇ T1 + a ° C, then go to step 306;
  • Step 304 determine whether the indoor heat exchanger temperature T2 is less than or equal to the indoor environment If the temperature T1 is equal to the second preset temperature value b ° C, if T2 ⁇ T1 + b ° C, then go to step 305, if T2 > T1 + b ° C, then go to step 306; step 305, determine that the four-way valve is changing To the abnormal state, and output four Valve switches an abnormality signal, and then ends the determination; step 306, it is determined to change the four-way valve is in a normal
  • the preset condition includes at least one of the following conditions: the running time of the air conditioner is greater than or equal to a predetermined running time; the current operating mode of the air conditioner is a non-automatic operating mode; the current state of the air conditioner The operation mode is a non-supply operation mode; the current operation mode of the air conditioner is a non-defrosting mode, and the air conditioner is separated from the defrost end time by a preset time.
  • the first preset temperature value a and the second preset temperature value b may be selected to be 1 ° C, when the user-set working mode is the heating mode, if detected
  • the indoor ambient temperature T1 is 15 °C
  • the indoor heat exchanger temperature T2 is 15.5 °C, that is, T2 ⁇ T1 + 1 ° C. It is considered that the four-way valve has no normal commutation or incomplete reversal, that is, the four-way valve is in the commutation abnormality. State, at this time, the temperature difference of 0.5 degrees Celsius may be the sampling deviation of the system.
  • the temperature T2 of the indoor heat exchanger is greater than the indoor ambient temperature T1
  • the four-way valve is not normally commutated or not completely reversing because, If the four-way valve is normally reversed, the temperature of the indoor heat exchanger should be much larger than the indoor ambient temperature.
  • step 305 after determining that the four-way valve is in the reversing abnormal state, the four-way valve can be automatically repaired by an alarm device or the like, or by the abnormal signal output device to control the four-way valve maintenance device in the air conditioner. .
  • the embodiment of the second aspect of the present invention provides a four-way valve fault detecting method, as shown in FIG. 4, comprising: step 402, detecting the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger and the user-set work. a mode; step 404, determining, according to the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger, whether the current operating mode of the air conditioner is the same as the working mode set by the user, if the air conditioner Determining that the four-way valve is in a commutation abnormal state, and determining that the current operation mode of the air conditioner is the same as the operation mode set by the user, and determining that the current operation mode is different from the operation mode set by the user.
  • the four-way valve is in a normal commutation state.
  • the four-way valve fault detecting method can detect the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger and the working mode set by the user, thereby being able to be based on the temperature of the indoor heat exchanger And the temperature of the outdoor heat exchanger determines whether the current operating mode of the air conditioner is the same as the working mode set by the user, so that when the current operating mode of the air conditioner is different from the working mode set by the user, the four-way valve can be determined. If the four-way valve is in the direction of commutation abnormality, the user can be notified to the four-way valve in time.
  • the determining according to the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger The specific process of whether the current operating mode of the air conditioner is the same as the working mode set by the user is: determining whether the temperature of the indoor heat exchanger is greater than or equal to the temperature of the outdoor heat exchanger, if If the temperature of the indoor heat exchanger is greater than or equal to the temperature of the outdoor heat exchanger, it is determined that the current operating mode of the air conditioner is different from the operating mode set by the user, if the temperature of the indoor heat exchanger is less than the The temperature of the outdoor heat exchanger determines that the current operating mode of the air conditioner is the same as the operating mode set by the user.
  • the process of determining the fault of the four-way valve by using the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger is different, specifically, cooling is performed in the air conditioner.
  • the indoor heat exchanger is an evaporator
  • the outdoor heat exchanger is a condenser, so that the refrigerant will continuously evaporate and absorb heat in the indoor heat exchanger and continuously condense heat in the outdoor heat exchanger.
  • the heat in the room is continuously released to the outside to achieve the purpose of cooling mode or dehumidification mode. Therefore, according to the law of energy transfer, indoor heat exchangers are used in air conditioner cooling mode or dehumidification mode.
  • the temperature must be lower than the temperature of the outdoor heat exchanger. Therefore, if the operating mode set by the user is the cooling mode or the dehumidification mode, if the temperature of the indoor heat exchanger is higher than or equal to the temperature of the outdoor heat exchanger, It is inevitable that the current operating mode of the air conditioner is not the cooling mode or the dehumidification mode, that is, the four-way valve is not normally reversing or not completely reversing, and then it can be determined that the four-way valve has a commutation fault.
  • the determining according to the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger Whether the current operation mode of the air conditioner is the same as the working mode set by the user is: determining whether the temperature of the indoor heat exchanger is less than or equal to the temperature of the outdoor heat exchanger, if the indoor heat exchange If the temperature of the outdoor heat exchanger is less than or equal to the temperature of the outdoor heat exchanger, it is determined that the current operating mode of the air conditioner is different from the working mode set by the user, if the temperature of the indoor heat exchanger is greater than the outdoor heat exchange The temperature of the device determines that the current operating mode of the air conditioner is the same as the operating mode set by the user.
  • the refrigerant in the outdoor heat exchanger evaporates and absorbs heat, and then the heat source is continuously delivered to the indoor heat exchanger, thereby transferring heat through heat transfer. Dissipated into the room, therefore, the temperature of the indoor heat exchanger must be higher than the temperature of the outdoor heat exchanger.
  • the operating mode set by the user is the heating mode
  • the temperature of the indoor heat exchanger is still lower than or equal to the outdoor
  • the temperature of the heat exchanger is inevitable that the current operating mode of the air conditioner is not the heating mode, so that it can be determined that the four-way valve is not reversing or not completely reversing, that is, the four-way valve is in a commutation abnormal state.
  • the four-way valve fault detecting method further includes: determining whether a current condition of the air conditioner meets a preset condition; and determining that a current condition of the air conditioner meets a preset And the step of detecting the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger and the user-set working mode; wherein the preset condition includes at least one of the following conditions: operation of the air conditioner The time is greater than or equal to the predetermined running time; the current operating mode of the air conditioner is a non-automatic operating mode; the current operating mode of the air conditioner is a non-airing operating mode; and the current operating mode of the air conditioner is a non-defrosting mode. And the air conditioner is separated from the defrosting end time by a preset time.
  • the four-way valve fault detection method is as shown in FIG. 5, and includes:
  • Step 502 Determine whether the current condition of the air conditioner meets the preset condition, and when the current condition of the air conditioner meets the preset condition, perform step 504, and vice versa, where the air conditioner is located. When the current condition does not meet the preset condition, the four-way valve is not detected for failure.
  • Step 504 detecting the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger and the user-set work mode.
  • Step 506 determining, according to the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger, whether the current operating mode of the air conditioner is the same as the working mode set by the user, if the current state of the air conditioner If the operation mode is different from the operation mode set by the user, it is determined that the four-way valve is in a commutation abnormal state, and vice versa, if the current operation mode of the air conditioner is the same as the operation mode set by the user, The four-way valve is in the normal state of commutation and ends the fault detection of the four-way valve.
  • the technical solution judges the current condition of the air conditioner, and only determines whether the current condition of the air conditioner meets the preset condition, thereby preventing the misjudgment, thereby improving the fault detection method of the four-way valve. accuracy. Specifically, for example, when the air conditioner is just running, the amount of the cooling mode or the heating mode generated by the air conditioner is still very small, and therefore, it is insufficient to cause a temperature difference between the indoor heat exchanger and the outdoor heat exchanger, and therefore, In this case, if the four-way valve fault detection method is used to detect the fault of the four-way valve, it is easy to detect the fault, and then the fault of the four-way valve is performed after the running time of the air conditioner is greater than or equal to the preset time.
  • the detection can improve the accuracy of the four-way valve fault detection method.
  • the air conditioner operating mode is the automatic operation mode, since the air conditioner itself adjusts the working mode from time to time, it is not suitable for using the four-way at this time.
  • the valve fault detection method detects the fault of the four-way valve.
  • the air conditioner is in the air supply mode, the compressor is not operated, and the air conditioner does not perform the corresponding cooling mode or heating mode, therefore, the indoor heat exchanger There is also no temperature difference between the outdoor heat exchanger and the outdoor heat exchanger. Therefore, it is not suitable to use this method for fault detection of the four-way valve.
  • the four-way valve fault detection method to detect the fault of the four-way valve, because the essence of defrosting is to adjust the working mode of the air conditioner to Heating mode, therefore, during the defrosting period or shortly after the defrosting, the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger change due to the change of the operating mode of the air conditioner, so It is not possible to determine the abnormality of the four-way valve commutation simply based on the temperature difference between the indoor heat exchanger and the outdoor heat exchanger.
  • the four-way valve failure detecting method further comprises: after the determining that the four-way valve is in a commutation abnormal state, outputting a four-way valve commutation abnormality signal.
  • the four-way valve is in a reversing abnormal state, that is, after the reversing or not completely reversing, the sound, light, and text are emitted.
  • Various prompts, etc. in order to prompt the user that the four-way valve of the air conditioner is in an abnormal state, thereby facilitating the user to repair the air conditioner in time, and on the other hand, generating and transmitting through the signal output device.
  • the four-way valve reverses the abnormal signal, so that the air conditioner automatically repairs the four-way valve according to the received four-way valve reverse abnormal signal.
  • Step 601 Determine whether the current condition of the air conditioner meets a preset condition, if the step is satisfied 602, if not satisfied, directly end the determination; step 602, detecting the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger and the user-set working mode, if the user-set working mode is detected as the cooling mode or dehumidification If the mode is changed to step 603, if it is detected that the working mode set by the user is the heating mode, then go to step 604; step 603, determine whether the temperature T1 of the indoor heat exchanger is greater than or equal to the temperature T2 of the outdoor heat exchanger, if T1 ⁇ T2, then go to step 605, if T1 ⁇ T2, go to step 606; step 604, determine whether the temperature T1 of the indoor heat exchanger is less than or equal to the temperature T2 of the outdoor heat exchanger,
  • the preset condition includes at least one of the following conditions: an operating time of the air conditioner is greater than or equal to a predetermined running time; a current operating mode of the air conditioner is a non-automatic operating mode; a current state of the air conditioner The operation mode is a non-supply operation mode; the current operation mode of the air conditioner is a non-defrosting mode, and the air conditioner is separated from the defrost end time by a preset time.
  • step 604 specifically, for example, when the operating mode set by the user is the heating mode, if the temperature T1 of the indoor heat exchanger is 15 ° C, the temperature T2 of the outdoor heat exchanger is 16 ° C, that is, T1 ⁇ T2, it is considered that the four-way valve does not change normally or not completely, that is, the four-way valve is in the abnormal state of commutation, because if the four-way valve is normally reversed, the temperature of the indoor heat exchanger should be greater than the outdoor heat exchanger. temperature.
  • step 605 after determining that the four-way valve is in the commutation abnormal state, the four-way valve can be automatically repaired by an alarm device or the like, or by the abnormal signal output device to control the four-way valve maintenance device in the air conditioner. .
  • the embodiment of the third aspect of the present invention provides a four-way valve fault detection method, as shown in FIG. 7, comprising: step 702, detecting the temperature of the outdoor heat exchanger and the temperature of the outdoor environment and the working mode set by the user; Step 704, determining, according to the temperature of the outdoor heat exchanger and the temperature of the outdoor environment, whether the current operating mode of the air conditioner is the same as the working mode set by the user, if the current operating mode of the air conditioner Different from the working mode set by the user, it is determined that the four-way valve is in the direction of commutation abnormality If the current operating mode of the air conditioner is the same as the working mode set by the user, it is determined that the four-way valve is in a normal commutation state.
  • the four-way valve fault detecting method can detect the temperature of the outdoor heat exchanger and the temperature of the outdoor environment and the working mode set by the user, thereby being able to be based on the temperature of the outdoor heat exchanger and the outdoor
  • the temperature of the environment determines whether the current operating mode of the air conditioner is the same as the working mode set by the user, so that when the current operating mode of the air conditioner is different from the working mode set by the user, it can be determined that the four-way valve is not changed according to the regulations.
  • the four-way valve is in a reversing abnormal state, and then the user can be notified in time to repair the four-way valve.
  • the four-way can be determined.
  • the valve has been reversing according to the regulations, that is, the four-way valve is in the normal state of commutation, so no treatment can be done.
  • the determining according to the temperature of the outdoor heat exchanger and the temperature of the outdoor environment is: determining whether the temperature of the outdoor heat exchanger is greater than or equal to the temperature of the outdoor environment and the first preset temperature value.
  • determining if the temperature of the outdoor heat exchanger is greater than or equal to a sum of a temperature of the outdoor environment and the first preset temperature value, determining a current operating mode of the air conditioner and a working mode set by the user Differently, if the temperature of the outdoor heat exchanger is less than the sum of the temperature of the outdoor environment and the first preset temperature value, determining that the current operating mode of the air conditioner is the same as the working mode set by the user Wherein the first preset temperature value is greater than or equal to a detection error value when detecting the temperature of the outdoor heat exchanger.
  • the air conditioner performs the cooling mode or In the dehumidification mode, the outdoor heat exchanger is equivalent to a condenser, which dissipates the heat in the room to the outdoor environment through the condensation heat of the refrigerant. Therefore, when the temperature of the outdoor heat exchanger is lower than the temperature of the outdoor environment, the air conditioner Only when the cooling mode or the dehumidification mode can be realized, that is, when the air conditioner is in the cooling mode or the dehumidification mode, the temperature of the outdoor heat exchanger must be lower than the outdoor ambient temperature.
  • the working mode set by the user is the cooling mode or the dehumidification mode.
  • the mode if the temperature of the outdoor heat exchanger is higher than or equal to the outdoor ambient temperature, it is inevitable that the current operating mode of the air conditioner is not the cooling mode or the dehumidification mode, that is, the four-way valve is not normally reversing or not completely reversing. , then you can determine that the four-way valve has failed, but consider The detection error when detecting the temperature of the outdoor heat exchanger, therefore, when the operating mode set by the user is the cooling mode or the dehumidification mode, if the temperature of the outdoor heat exchanger is higher or lower than the outdoor ambient temperature, It does not necessarily explain the abnormality of the four-way valve commutation.
  • the four-way valve fault detection method provided by the technical solution appropriately takes into consideration the detection error when detecting the temperature of the outdoor heat exchanger, thereby preventing the temperature detection error.
  • the occurrence of detection errors occurs, which improves the accuracy of the four-way valve fault detection method.
  • the first preset temperature value is greater than or equal to 1 ° C.
  • the failure detection of the four-way valve In the process, only when the temperature of the outdoor heat exchanger is higher than the outdoor ambient temperature by 1 ° C and above, it can be explained that the four-way valve is not reversing or not completely reversing, thereby avoiding erroneous fault detection due to detection error. In turn, the accuracy of the four-way valve fault detection can be improved.
  • the air conditioner when it is detected that the operating mode set by the user is the heating mode, the air conditioner is determined according to the temperature of the outdoor heat exchanger and the temperature of the outdoor environment. Whether the current operation mode is the same as the working mode set by the user is: determining whether the temperature of the outdoor heat exchanger is less than or equal to the sum of the temperature of the outdoor environment and the second preset temperature value, If the temperature of the outdoor heat exchanger is less than or equal to the sum of the temperature of the outdoor environment and the second preset temperature value, determining that the current operating mode of the air conditioner is different from the working mode set by the user, The temperature of the outdoor heat exchanger is greater than the sum of the temperature of the outdoor environment and the second preset temperature value, determining that the current operating mode of the air conditioner is the same as the working mode set by the user; The second preset temperature value is greater than or equal to a detection error value when detecting the temperature of the outdoor heat exchanger.
  • the outdoor heat exchanger when the working mode set by the user is the heating mode, the outdoor heat exchanger continuously transfers heat to the room through the evaporation heat absorption of the refrigerant, that is, the outdoor heat exchanger continuously draws from the outdoor environment.
  • the heat is such that the temperature of the outdoor heat exchanger is higher than the temperature of the outdoor environment.
  • the operating mode set by the user is the heating mode
  • the temperature of the outdoor heat exchanger is lower than or equal to the outdoor ambient temperature
  • the current operating mode of the air conditioner is not the heating mode, so that it can be determined that the four-way valve is not reversing or not completely reversing, that is, the four-way valve is in an abnormal state, but the detection when detecting the temperature of the outdoor heat exchanger is also considered.
  • the four-way valve fault detection method provided by the technical solution also appropriately considers the error of the temperature detection, thereby preventing the occurrence of a detection error due to the temperature detection error, thereby improving the four-way valve failure detection. The accuracy of the method.
  • the second preset temperature value is greater than or equal to 1 ° C.
  • the existing air conditioner when the temperature of the outdoor heat exchanger is detected, there is generally a positive or negative deviation of 1 ° C. Therefore, in the heating mode, the fault detection of the four-way valve is in progress. Only when the temperature of the outdoor heat exchanger is 1 ° C lower than the outdoor ambient temperature and more can the four-way valve not be reversing or not completely reversing, so as to avoid erroneous fault detection due to detection error, and then Improve the accuracy of four-way valve fault detection.
  • the four-way valve fault detecting method further includes: determining whether a current condition of the air conditioner meets a preset condition; and determining that a current condition of the air conditioner meets a preset And the step of detecting the temperature of the outdoor heat exchanger and the temperature of the outdoor environment and the working mode set by the user; wherein the preset condition includes at least one of the following conditions: the running time of the air conditioner is greater than Equivalent to a predetermined running time; the current operating mode of the air conditioner is a non-automatic operating mode; the current operating mode of the air conditioner is a non-supply operating mode; the current operating mode of the air conditioner is a non-defrosting mode, and The air conditioner is separated from the defrosting end time by a preset time.
  • the four-way valve fault detection method is as shown in FIG. 8 and includes:
  • Step 802 Determine whether the current condition of the air conditioner meets the preset condition, and when the current condition of the air conditioner meets the preset condition, perform step 804, and vice versa, where the air conditioner is located. When the current condition does not meet the preset condition, the four-way valve is not detected for failure.
  • step 804 the temperature of the outdoor heat exchanger and the temperature of the outdoor environment and the working mode set by the user are detected.
  • Step 806 determining, according to the temperature of the outdoor heat exchanger and the temperature of the outdoor environment, whether the current operating mode of the air conditioner is the same as the working mode set by the user, if the current operating mode of the air conditioner Different from the working mode set by the user, it is determined that the four-way valve is in a commutation abnormal state, and vice versa, if the current operating mode of the air conditioner is the same as the working mode set by the user, determining the four-way The valve is in the normal state of commutation and ends the fault detection of the four-way valve.
  • the technical solution judges the current condition of the air conditioner, and only judges the fault when the current condition of the air conditioner meets the preset condition, thereby preventing misjudgment, thereby improving the four-way The accuracy of the valve fault detection method.
  • the amount of the cooling mode or the heating mode generated by the air conditioner is still very small, and therefore, it is insufficient to cause a temperature difference between the outdoor heat exchanger and the outdoor environment, and therefore, in this case
  • the four-way valve fault detection method is used to detect the fault of the four-way valve, it is easy to detect the fault, so that the fault detection of the four-way valve can be improved after the running time of the air conditioner is greater than or equal to the preset time.
  • the accuracy of the four-way valve fault detection method is similar.
  • the air conditioner's operation mode is the automatic operation mode, since the air conditioner itself adjusts the working mode from time to time, it is not suitable for the four-way valve fault detection at this time.
  • the method detects the fault of the four-way valve.
  • the air conditioner is in the air supply mode, the compressor is not running, and the air conditioner does not perform the corresponding cooling mode or heating mode, therefore, the outdoor heat exchanger and the outdoor environment There is no temperature difference between them, and therefore, it is not suitable to use this method for fault detection of the four-way valve.
  • the four-way valve failure detecting method further comprises: after the determining that the four-way valve is in a commutation abnormal state, outputting a four-way valve commutation abnormality signal.
  • an alarm output device such as an alarm device or a display screen
  • it is determined that the four-way valve is in a reversing abnormal state that is, after the reversing or not completely reversing, the sound, light, and text are emitted.
  • Various prompts, etc. in order to prompt the user that the four-way valve of the air conditioner is in an abnormal state, thereby facilitating the user to repair the air conditioner in time, and on the other hand, generating and outputting the four-way valve through the signal output device Abnormal signal, so that the air conditioner automatically repairs the four-way valve according to the received four-way valve reversal abnormal signal.
  • Step 901 determining whether the current condition of the air conditioner meets a preset condition, if the step is satisfied 902, if not satisfied, directly end the determination; step 902, detecting the temperature of the outdoor heat exchanger and the temperature of the outdoor environment and the user-set working mode, if it is detected that the user-set working mode is the cooling mode or the dehumidification mode, Then, in step 903, if it is detected that the working mode set by the user is the heating mode, then go to step 904; step 903, determine whether the temperature T2 of the outdoor heat exchanger is large.
  • step 904 determine outdoor Whether the temperature T2 of the heat exchanger is less than or equal to the sum of the temperature T1 of the outdoor environment and the second preset temperature value b ° C, if T2 ⁇ T1 + b ° C, then go to step 905, if T2 > T1 + b ° C, then the step 906; Step 905, determining that the four-way valve is in the commutation abnormal state, and outputting the four-way valve commutation abnormality signal, and then ending the determination; in step 906, determining that the four-way valve is in the normal commutation state, and then ending the determination.
  • the preset condition includes at least one of the following conditions: the running time of the air conditioner is greater than or equal to the predetermined running time; the current operating mode of the air conditioner is a non-automatic running mode; the current state of the air conditioner The operation mode is a non-supply operation mode; the current operation mode of the air conditioner is a non-defrosting mode, and the air conditioner is separated from the defrost end time by a preset time.
  • the first preset temperature value a and the second preset temperature value b may be selected to be 1 ° C, and when the user-set working mode is the heating mode, if detected
  • the outdoor ambient temperature T1 is 7 ° C
  • the outdoor heat exchanger temperature T2 is 7.5 ° C, that is, T2 ⁇ T1 + 1 ° C, it is considered that the four-way valve has no normal commutation or incomplete reversal, that is, the four-way valve is in the commutation abnormality.
  • the temperature difference of 0.5 degrees Celsius may be the sampling deviation of the system.
  • the temperature T2 of the outdoor heat exchanger is greater than the outdoor ambient temperature T1
  • the four-way valve is not normally commutated or not completely reversing because, If the four-way valve is normally reversed, the temperature of the outdoor heat exchanger should be much larger than the outdoor ambient temperature.
  • step 905 after determining that the four-way valve is in the reversing abnormal state, the four-way valve can be automatically repaired by an alarm device or the like, or by the abnormal signal output device to control the four-way valve maintenance device in the air conditioner. .
  • FIG. 10 is a block diagram showing the structure of a four-way valve failure detecting device 10 according to an embodiment of the present invention.
  • an embodiment of the fourth aspect of the present invention provides a four-way valve failure detecting device 10 for an air conditioner, comprising: a detecting device 102 for detecting the temperature of an indoor heat exchanger and an indoor environment. And a working mode set by the user; the processing device 104 is configured to determine, according to the temperature of the indoor heat exchanger and the temperature of the indoor environment, whether the current operating mode of the air conditioner is working with the user The mode is the same, and when the current operating mode of the air conditioner is different from the working mode set by the user, determining that the four-way valve is in a commutating abnormal state, and in the current operating mode of the air conditioner and the user setting When the predetermined working mode is the same, it is determined that the four-way valve is in the normal state of commutation.
  • the four-way valve fault detecting device 10 can detect the temperature of the indoor heat exchanger and the temperature of the indoor environment and the working mode set by the user, thereby being able to be based on the temperature of the indoor heat exchanger and
  • the temperature of the indoor environment determines whether the current operating mode of the air conditioner is the same as the working mode set by the user, so that when the current operating mode of the air conditioner is different from the working mode set by the user, it can be determined that the four-way valve is not in accordance with the regulations.
  • the reversing direction that is, the four-way valve is in the state of reversing abnormality, and then the user can be notified in time to repair the four-way valve.
  • the four can be judged.
  • the valve has been reversing according to the regulations, that is, the four-way valve is in the normal state of commutation, so no treatment can be done.
  • the processing device 104 is configured to determine the indoor heat exchanger when the detecting device 102 detects that the working mode set by the user is a cooling mode or a humidifying mode. Whether the temperature is greater than or equal to the sum of the temperature of the indoor environment and the first preset temperature value, and when the temperature of the indoor heat exchanger is greater than or equal to the sum of the temperature of the indoor environment and the first preset temperature value Determining that the current operating mode of the air conditioner is different from the operating mode set by the user, and when the temperature of the indoor heat exchanger is less than the sum of the temperature of the indoor environment and the first preset temperature value Determining that the current operating mode of the air conditioner is the same as the operating mode set by the user; wherein the first preset temperature value is greater than or equal to a detection error value when detecting the temperature of the indoor heat exchanger.
  • the process of determining the failure of the four-way valve by using the temperature of the indoor heat exchanger and the temperature of the indoor environment is different, specifically, cooling or pumping in the air conditioner.
  • the indoor heat exchanger is equivalent to an evaporator, in which the refrigerant generates heat after evaporation and heat absorption, and the amount of cold produced can only be transferred to the room through heat transfer. Therefore, the indoor cooling capacity is derived from Indoor heat exchanger, according to the law of energy transmission, the temperature of the indoor heat exchanger must be lower than the indoor ambient temperature.
  • the user-set working mode is the cooling mode or the dehumidification mode
  • the indoor heat exchanger The temperature is still higher than or equal to the indoor ambient temperature, it is inevitable that the current operating mode of the air conditioner is not the cooling mode or the dehumidification mode, that is, the four-way valve is not normally reversing or not completely reversing, and then the four-way can be determined.
  • the valve has a fault, but considering the detection error when detecting the temperature of the indoor heat exchanger, if the user sets the working mode to the cooling mode or the dehumidification mode, if the indoor change The temperature of the device is higher or lower than the indoor ambient temperature, which does not necessarily indicate the abnormality of the four-way valve.
  • the four-way valve fault detection method provided by the technical solution appropriately considers the detection of the indoor heat exchanger. Detection error at temperature, which prevents the occurrence of false detection due to temperature detection errors Health, and thus improve the accuracy of the four-way valve fault detection method.
  • the first preset temperature value is greater than or equal to 1 ° C.
  • the failure detection of the four-way valve In the process, only when the temperature of the indoor heat exchanger is higher than 1 °C of the indoor ambient temperature, the four-way valve is not reversing or not completely reversing, so that the fault detection caused by the detection error can be avoided, and then It can improve the accuracy of four-way valve fault detection.
  • the processing device 104 is configured to determine whether the temperature of the indoor heat exchanger is less than when the detecting device 102 detects that the operating mode set by the user is the heating mode. And a sum of a temperature of the indoor environment and a second preset temperature value, and when the temperature of the indoor heat exchanger is less than or equal to a sum of a temperature of the indoor environment and the second preset temperature value, The current operating mode of the air conditioner is different from the working mode set by the user, and when the temperature of the indoor heat exchanger is greater than the sum of the temperature of the indoor environment and the second preset temperature value, The current operating mode of the air conditioner is the same as the working mode set by the user; wherein the second preset temperature value is greater than or equal to a detection error value when detecting the temperature of the indoor heat exchanger.
  • the working mode set by the user when the working mode set by the user is the heating mode, the heat of the indoor environment is derived from the indoor heat exchanger, and therefore, the temperature of the indoor heat exchanger is necessarily higher than the temperature of the indoor environment, and therefore,
  • the working mode set by the user is the heating mode, if the temperature of the indoor heat exchanger is lower than or equal to the indoor ambient temperature, it is inevitable that the current operating mode of the air conditioner is not the heating mode, so that the four-way valve can be determined. If the four-way valve is in an abnormal state, the detection error of the indoor heat exchanger is also considered.
  • the temperature of the heat exchanger is higher or lower than the indoor ambient temperature, which does not necessarily indicate the abnormality of the four-way valve. Therefore, the four-way valve fault detection method provided by the technical solution also appropriately considers the temperature detection.
  • the error can prevent the occurrence of false detection due to the temperature detection error, thereby improving the accuracy of the four-way valve fault detection method.
  • the second preset temperature value is greater than or equal to 1 ° C.
  • the failure detection of the four-way valve is in progress. Only when the temperature of the indoor heat exchanger is lower than 1 °C of the indoor ambient temperature, the four-way valve is not changed. The direction of the four-way valve fault detection can be improved by avoiding faulty fault detection due to detection error.
  • the processing device 104 is further configured to determine whether the current condition of the air conditioner meets a preset condition, and when the current condition of the air conditioner meets the preset condition, the control detects
  • the device 102 detects the temperature of the indoor heat exchanger and the temperature of the indoor environment and the working mode set by the user; wherein the preset condition includes at least one of the following conditions: the running time of the air conditioner is greater than or equal to the predetermined running time;
  • the current operating mode of the air conditioner is a non-automatic operation mode; the current operating mode of the air conditioner is a non-supply operation mode; the current operation mode of the air conditioner is a non-defrosting mode, and the air conditioner is defrosted
  • the end time is greater than the preset time.
  • the current condition of the air conditioner is judged, and the fault determination is performed only when the current condition of the air conditioner satisfies the preset condition, thereby preventing misjudgment and further improving the four-way valve failure.
  • the accuracy of the test method Specifically, for example, when the air conditioner is just running, the amount of cooling or the amount of heat generated by the air conditioner is still very small, and therefore, it is insufficient to cause a temperature difference between the indoor heat exchanger and the indoor environment, and therefore, in this case,
  • the four-way valve fault detection method to detect the fault of the four-way valve, it is easy to detect the fault, so that the four-way valve fault detection can be improved after the air conditioner running time is greater than or equal to the preset time.
  • the accuracy of the fault detection method in the same way, when the operation mode of the air conditioner is the automatic operation mode, since the air conditioner itself adjusts the working mode at a time, it is not suitable to use the four-way valve fault detection method at this time.
  • the valve is used for fault detection.
  • the air conditioner when the air conditioner is in the air supply mode, the compressor is not running. At this time, the air conditioner does not perform corresponding cooling or heating. Therefore, there is no temperature between the indoor heat exchanger and the indoor environment. Poor, and therefore, it is not suitable to use this method for fault detection of a four-way valve.
  • the four-way valve fault detection method to detect the fault of the four-way valve, because the essence of defrosting is to adjust the working mode of the air conditioner to Heating mode, therefore, during the defrosting period or shortly after the defrosting, the temperature of the indoor heat exchanger and the temperature of the indoor environment will change due to the change of the operating mode of the air conditioner. Therefore, It is possible to determine the abnormality of the four-way valve commutation simply based on the difference between the temperature of the indoor heat exchanger and the temperature of the indoor environment.
  • the four-way valve failure detecting device 10 further includes: an output device 106, configured to determine, at the processing device 104, that the four-way valve is in a commutation abnormality After the state, the four-way valve commutation abnormality signal is output.
  • an alarm output device such as an alarm device or a display screen
  • it is determined that the four-way valve is in a reversing abnormal state that is, after the reversing or not completely reversing, the sound, light, and text are emitted.
  • Various prompts, etc. in order to prompt the user that the four-way valve of the air conditioner is in an abnormal state, thereby facilitating the user to repair the air conditioner in time, and on the other hand, generating and outputting the four-way valve through the signal output device Abnormal signal, so that the air conditioner automatically repairs the four-way valve according to the received four-way valve reversal abnormal signal.
  • Fig. 11 is a block diagram showing the structure of a four-way valve failure detecting device 11 according to an embodiment of the present invention.
  • the embodiment of the second aspect of the present invention provides a four-way valve fault detecting device 11 for an air conditioner, comprising: detecting device 112 for detecting temperature and outdoor heat exchange of an indoor heat exchanger The temperature of the device and the operating mode set by the user; the processing device 114 is configured to determine, according to the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger, whether the current operating mode of the air conditioner is related to the user The set working mode is the same, and when the current operating mode of the air conditioner is different from the working mode set by the user, determining that the four-way valve is in a commutating abnormal state, and in the current operating mode of the air conditioner When the working mode set by the user is the same, it is determined that the four-way valve is in a normal state of commutation.
  • the four-way valve fault detecting device 11 can detect the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger and the working mode set by the user, thereby being The temperature and the temperature of the outdoor heat exchanger determine whether the current operating mode of the air conditioner is the same as the working mode set by the user, so that when the current operating mode of the air conditioner is different from the working mode set by the user, the four-way valve can be determined.
  • the reversing direction is not in accordance with the regulations, that is, the four-way valve is in the state of reversing abnormality, and then the user can be notified in time to repair the four-way valve.
  • the processing device 114 is configured to determine the indoor heat exchanger when the detecting device 112 detects that the working mode set by the user is a cooling mode or a dehumidifying mode. Whether the temperature is greater than or equal to the temperature of the outdoor heat exchanger, and determining the current operating mode of the air conditioner and the user setting when the temperature of the indoor heat exchanger is greater than or equal to the temperature of the outdoor heat exchanger The working mode is different, and when the temperature of the indoor heat exchanger is less than the temperature of the outdoor heat exchanger, it is determined that the current operating mode of the air conditioner is the same as the working mode set by the user.
  • the process of determining the fault of the four-way valve by using the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger is different, specifically, cooling is performed in the air conditioner.
  • the indoor heat exchanger is an evaporator
  • the outdoor heat exchanger is a condenser, so that the refrigerant will continuously evaporate and absorb heat in the indoor heat exchanger and continuously condense heat in the outdoor heat exchanger.
  • the heat in the room is continuously released to the outside to achieve the purpose of cooling mode or dehumidification mode.
  • the temperature of the indoor heat exchanger must be lower than the temperature of the outdoor heat exchanger. Therefore, the working mode set by the user is the cooling mode or pumping.
  • the wet mode if the temperature of the indoor heat exchanger is higher than or equal to the temperature of the outdoor heat exchanger, it is inevitable that the current operating mode of the air conditioner is not the cooling mode or the dehumidification mode, that is, the four-way valve is not normally reversed or If the steering is not completely reversed, it can be determined that the four-way valve has a commutation fault.
  • the processing device 114 is configured to determine whether the temperature of the indoor heat exchanger is less than when the detecting device 112 detects that the working mode set by the user is the heating mode. Is equal to the temperature of the outdoor heat exchanger, and when the temperature of the indoor heat exchanger is less than or equal to the temperature of the outdoor heat exchanger, determining a current operating mode of the air conditioner and a working mode set by the user Differently, when the temperature of the indoor heat exchanger is greater than the temperature of the outdoor heat exchanger, it is determined that the current operating mode of the air conditioner is the same as the working mode set by the user.
  • the refrigerant in the outdoor heat exchanger evaporates and absorbs heat, and then the heat source is continuously delivered to the indoor heat exchanger, thereby transferring heat through heat transfer. Dissipated into the room, therefore, the temperature of the indoor heat exchanger must be higher than the temperature of the outdoor heat exchanger.
  • the operating mode set by the user is the heating mode
  • the temperature of the indoor heat exchanger is still lower than or equal to the outdoor
  • the temperature of the heat exchanger is inevitable that the current operating mode of the air conditioner is not the heating mode, so that it can be determined that the four-way valve is not reversing or not completely reversing, that is, the four-way valve is in a commutation abnormal state.
  • the processing device 114 is further configured to determine whether the current condition of the air conditioner meets a preset condition, and when the current condition of the air conditioner meets the preset condition, the control detects
  • the device 112 detects the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger and the operating mode set by the user; wherein the preset condition includes at least one of the following conditions: the running time of the air conditioner is greater than or equal to the predetermined running time
  • the current operating mode of the air conditioner is a non-automatic operation mode; the current operating mode of the air conditioner is a non-supply operation mode; the current operation mode of the air conditioner is a non-defrosting mode, and the air conditioner distance
  • the defrosting end time is greater than the preset time.
  • the current condition of the air conditioner is judged, and the fault determination is performed only when the current condition of the air conditioner satisfies the preset condition, thereby preventing misjudgment and further improving the four-way valve failure.
  • the accuracy of the test method is performed only when the current condition of the air conditioner satisfies the preset condition, thereby preventing misjudgment and further improving the four-way valve failure.
  • the air conditioner operating mode is the automatic operation mode, since the air conditioner itself adjusts the working mode from time to time, it is not suitable for using the four-way at this time.
  • the valve fault detection method detects the fault of the four-way valve.
  • the air conditioner is in the air supply mode, the compressor is not operated, and the air conditioner does not perform the corresponding cooling mode or heating mode, therefore, the indoor heat exchanger There is also no temperature difference between the outdoor heat exchanger and the outdoor heat exchanger. Therefore, it is not suitable to use this method for fault detection of the four-way valve.
  • the four-way valve fault detection method to detect the fault of the four-way valve, because the essence of defrosting is to adjust the working mode of the air conditioner to Heating mode, therefore, during the defrosting period or shortly after the defrosting, the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger change due to the change of the operating mode of the air conditioner, so It is not possible to determine the abnormality of the four-way valve commutation simply based on the temperature difference between the indoor heat exchanger and the outdoor heat exchanger.
  • the four-way valve failure detecting device 11 further includes: an output device 116, configured to determine, at the processing device 114, that the four-way valve is in a commutation abnormality After the state, the four-way valve commutation abnormality signal is output.
  • an alarm output device such as an alarm device or a display screen
  • it is determined that the four-way valve is in a reversing abnormal state that is, after the reversing or not completely reversing, the sound, light, and text are emitted.
  • Various prompts, etc. in order to prompt the user that the four-way valve of the air conditioner is in an abnormal state, thereby facilitating the user to repair the air conditioner in time, and on the other hand, generating and outputting the four-way valve through the signal output device Abnormal signal, so that the air conditioner automatically repairs the four-way valve according to the received four-way valve reversal abnormal signal.
  • Fig. 12 is a block diagram showing the structure of a four-way valve failure detecting device 12 according to an embodiment of the present invention.
  • an embodiment of the sixth aspect of the present invention provides a four-way valve failure detecting device 12 for an air conditioner, comprising: detecting device 122 for detecting the temperature of an outdoor heat exchanger and an outdoor environment. And a working mode set by the user; the processing device 124 is configured to determine, according to the temperature of the outdoor heat exchanger and the temperature of the outdoor environment, whether the current operating mode of the air conditioner is working with the user The mode is the same, and when the current operating mode of the air conditioner is different from the working mode set by the user, determining that the four-way valve is in a commutating abnormal state, and in the current operating mode of the air conditioner and the user setting When the predetermined working mode is the same, it is determined that the four-way valve is in the normal state of commutation.
  • the four-way valve fault detecting device 12 can detect the temperature of the outdoor heat exchanger and the temperature of the outdoor environment and the working mode set by the user, thereby being able to be based on the temperature of the outdoor heat exchanger and
  • the temperature of the outdoor environment determines whether the current operating mode of the air conditioner is the same as the working mode set by the user, so that when the current operating mode of the air conditioner is different from the working mode set by the user, it can be determined that the four-way valve is not in accordance with the regulations.
  • the reversing direction that is, the four-way valve is in the state of reversing abnormality, and then the user can be notified in time to repair the four-way valve.
  • the four can be judged.
  • the valve has been reversing according to the regulations, that is, the four-way valve is in the normal state of commutation, so no treatment can be done.
  • the processing device 124 is configured to determine the outdoor heat exchanger when the detecting device 122 detects that the working mode set by the user is a cooling mode or a humidifying mode. Whether the temperature is greater than or equal to the sum of the temperature of the outdoor environment and the first preset temperature value, and when the temperature of the outdoor heat exchanger is greater than or equal to the sum of the temperature of the outdoor environment and the first preset temperature value Determining that the current operating mode of the air conditioner is different from the operating mode set by the user, and when the temperature of the outdoor heat exchanger is less than the sum of the temperature of the outdoor environment and the first preset temperature value Determining that the current operating mode of the air conditioner is the same as the operating mode set by the user; wherein the first preset temperature value is greater than or equal to a detection error value when detecting the temperature of the outdoor heat exchanger.
  • the air conditioner performs the cooling mode or
  • the outdoor heat exchanger is equivalent to a condenser, which dissipates the heat in the room to the outdoor environment through the condensation heat of the refrigerant.
  • the air conditioner Only when the cooling mode or the dehumidification mode can be realized, that is, when the air conditioner is in the cooling mode or the dehumidification mode, the temperature of the outdoor heat exchanger must be lower than the outdoor ambient temperature, and therefore, the user setting
  • the working mode is the cooling mode or the dehumidification mode
  • the temperature of the outdoor heat exchanger is higher than or equal to the outdoor ambient temperature, it is inevitable that the current operating mode of the air conditioner is not the cooling mode or the dehumidification mode, that is, the four-way valve.
  • the four-way valve may be faulty, but the detection error when detecting the temperature of the outdoor heat exchanger is taken into consideration. Therefore, the operating mode set by the user is the cooling mode or In the dehumidification mode, if the temperature of the outdoor heat exchanger is higher or lower than the outdoor ambient temperature, it does not necessarily indicate that the four-way valve is abnormally commutated. Therefore, the four-way valve fault detection method provided by the technical solution is appropriate.
  • the detection error when detecting the temperature of the outdoor heat exchanger is considered, thereby preventing the occurrence of a detection error due to the temperature detection error, thereby improving the accuracy of the four-way valve failure detection method.
  • the first preset temperature value is greater than or equal to 1 ° C.
  • the failure detection of the four-way valve In the process, only when the temperature of the outdoor heat exchanger is higher than the outdoor ambient temperature by 1 ° C and above, it can be explained that the four-way valve is not reversing or not completely reversing, thereby avoiding erroneous fault detection due to detection error. In turn, the accuracy of the four-way valve fault detection can be improved.
  • the processing device 124 is configured to determine whether the temperature of the outdoor heat exchanger is less than when the detecting device 122 detects that the operating mode set by the user is the heating mode. And a sum equal to a temperature of the outdoor environment and a second preset temperature value, and when the temperature of the outdoor heat exchanger is less than or equal to a sum of a temperature of the outdoor environment and the second preset temperature value, The current operating mode of the air conditioner is different from the working mode set by the user, and when the temperature of the outdoor heat exchanger is greater than the sum of the temperature of the outdoor environment and the second preset temperature value, The current operating mode of the air conditioner is the same as the working mode set by the user; wherein the second preset temperature value is greater than or equal to a detection error value when detecting the temperature of the outdoor heat exchanger.
  • the outdoor heat exchanger when the working mode set by the user is the heating mode, the outdoor heat exchanger continuously transfers heat to the room through the evaporation heat absorption of the refrigerant, that is, the outdoor heat exchanger continuously draws from the outdoor environment.
  • the heat is such that the temperature of the outdoor heat exchanger is higher than the temperature of the outdoor environment. Therefore, when the operating mode set by the user is the heating mode, if the temperature of the outdoor heat exchanger is lower than or equal to the outdoor ambient temperature, it is inevitable that The current operating mode of the air conditioner is not the heating mode, so that it can be determined that the four-way valve is not reversing or not completely reversing, that is, the four-way valve is in an abnormal state, but also considering the detection of the outdoor heat exchanger.
  • the four-way valve fault detection method provided by the technical solution also appropriately considers the error of temperature detection, thereby preventing the occurrence of detection error due to the temperature detection error, thereby improving the detection of the four-way valve failure. The accuracy of the method.
  • the second preset temperature value is greater than or equal to 1 ° C.
  • the existing air conditioner when the temperature of the outdoor heat exchanger is detected, there is generally a positive or negative deviation of 1 ° C. Therefore, in the heating mode, the fault detection of the four-way valve is in progress. Only when the temperature of the outdoor heat exchanger is 1 ° C lower than the outdoor ambient temperature and more can the four-way valve not be reversing or not completely reversing, so as to avoid erroneous fault detection due to detection error, and then Improve the accuracy of four-way valve fault detection.
  • the processing device 124 is further configured to determine whether the current condition that the air conditioner is in the current condition meets the preset condition, and control the detection when the current condition of the air conditioner meets the preset condition
  • the device 122 detects the temperature of the outdoor heat exchanger and the temperature of the outdoor environment and the working mode set by the user; wherein the preset condition includes at least one of the following conditions: the running time of the air conditioner is greater than or equal to the predetermined running time;
  • the current operating mode of the air conditioner is a non-automatic operation mode; the current operating mode of the air conditioner is a non-supply operation mode; the current operation mode of the air conditioner is a non-defrosting mode, and the air conditioner is defrosted
  • the end time is greater than the preset time.
  • the current condition of the air conditioner is judged, and the fault determination is performed only when the current condition of the air conditioner satisfies the preset condition, thereby preventing misjudgment and further improving the four-way valve failure.
  • the accuracy of the test method is performed only when the current condition of the air conditioner satisfies the preset condition, thereby preventing misjudgment and further improving the four-way valve failure.
  • the air conditioner's operation mode is the automatic operation mode, since the air conditioner itself adjusts the working mode from time to time, it is not suitable for the four-way valve fault detection at this time.
  • the method detects the fault of the four-way valve.
  • the air conditioner when the air conditioner is in the air supply mode, the compressor is not running, and the air conditioner does not perform the corresponding cooling mode or heating mode, therefore, the outdoor heat exchanger and the outdoor environment There is no temperature difference between them, and therefore, it is not suitable to use this method for fault detection of the four-way valve.
  • the four-way valve fault detection method to detect the fault of the four-way valve, because the essence of defrosting is to adjust the working mode of the air conditioner to the heating mode, therefore, During the defrosting period or shortly after the defrosting, the temperature of the outdoor heat exchanger and the temperature of the outdoor environment may change due to the change of the operating mode of the air conditioner. Therefore, it is not possible to simply change according to the outdoor. The difference between the temperature of the heater and the temperature of the outdoor environment determines that the four-way valve is abnormally commutated.
  • the four-way valve failure detecting device 12 further includes: an output device 126, configured to determine, at the processing device 124, that the four-way valve is in a commutation abnormality After the state, the four-way valve commutation abnormality signal is output.
  • an alarm output device such as an alarm device or a display screen
  • it is determined that the four-way valve is in a reversing abnormal state that is, after the reversing or not completely reversing, the sound, light, and text are emitted.
  • Various prompts, etc. in order to prompt the user that the four-way valve of the air conditioner is in an abnormal state, thereby facilitating the user to repair the air conditioner in time, and on the other hand, generating and outputting the four-way valve through the signal output device Abnormal signal, so that the air conditioner automatically repairs the four-way valve according to the received four-way valve reversal abnormal signal.
  • an embodiment of a seventh aspect of the present invention provides an air conditioner, as shown in FIG. 13 , including the four-way valve fault detecting apparatus 10 provided by any one of the fourth aspects, or As shown in FIG. 14, the four-way valve fault detecting device 11 provided by any one of the fifth aspects, or as shown in FIG. 15, includes the four-way valve fault detecting device 12 provided in any one of the sixth aspects. .
  • the air conditioner provided by the embodiment of the seventh aspect of the present invention includes the four-way valve fault detecting device 10 according to any one of the fourth aspects, or the four-way valve fault detecting according to any one of the fifth aspects
  • the beneficial effects of the fault detecting device will not be described here.
  • the description of the terms “one embodiment”, “some embodiments”, “specific embodiments” and the like means that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in the present invention. At least one embodiment or example.
  • the schematic representation of the above terms does not necessarily refer to the same embodiment or example.
  • the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

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Abstract

La présente invention concerne un procédé de détection de défaut de vanne à quatre voies, un appareil de détection de défaut de vanne à quatre voies et un climatiseur, le procédé de détection comprenant la détection d'une température d'échangeur de chaleur intérieur et d'environnement intérieur, ou la détection d'une température d'échangeur de chaleur intérieur et d'échangeur de chaleur extérieur, ou la détection d'une température d'échangeur de chaleur extérieur et d'environnement extérieur, et d'un mode de fonctionnement défini par un utilisateur (102); sur la base des températures détectées, la détermination si le mode de fonctionnement actuel du climatiseur est le même que le mode de fonctionnement défini par l'utilisateur, et si ce n'est pas le même, la détermination que la vanne à quatre voies est dans un état de commutation anormal, et si c'est le même, la détermination que la vanne à quatre voies est dans un état de commutation normal (104).
PCT/CN2017/082265 2016-05-05 2017-04-27 Procédé de détection de défaut de vanne à quatre voies, appareil de détection de défaut de vanne à quatre voies et climatiseur Ceased WO2017190628A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CN201610298345.9A CN105928278A (zh) 2016-05-05 2016-05-05 四通阀故障检测方法、四通阀故障检测装置及空调器
CN201610298344.4A CN105928150A (zh) 2016-05-05 2016-05-05 四通阀故障检测方法、四通阀故障检测装置及空调器
CN201610298391.9A CN105928279A (zh) 2016-05-05 2016-05-05 四通阀故障检测方法、四通阀故障检测装置及空调器
CN201610298345.9 2016-05-05
CN201610298391.9 2016-05-05
CN201610298344.4 2016-05-05

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WO2017190628A1 true WO2017190628A1 (fr) 2017-11-09

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110044009A (zh) * 2019-04-25 2019-07-23 宁波奥克斯电气股份有限公司 一种四通阀切换故障检测方法、装置及空调器
CN110411057A (zh) * 2019-08-14 2019-11-05 珠海格力电器股份有限公司 一种四通阀换向的监控方法、监控装置及空调系统
CN114183883A (zh) * 2021-12-09 2022-03-15 珠海格力电器股份有限公司 四通阀的检测方法及空调
CN115264748A (zh) * 2022-06-24 2022-11-01 青岛海尔空调器有限总公司 空调故障检测方法、装置、空调及电子设备
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CN110411057A (zh) * 2019-08-14 2019-11-05 珠海格力电器股份有限公司 一种四通阀换向的监控方法、监控装置及空调系统
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