WO2020101117A1 - Climatiseur et procédé de fonctionnement associé - Google Patents

Climatiseur et procédé de fonctionnement associé Download PDF

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Publication number
WO2020101117A1
WO2020101117A1 PCT/KR2019/001875 KR2019001875W WO2020101117A1 WO 2020101117 A1 WO2020101117 A1 WO 2020101117A1 KR 2019001875 W KR2019001875 W KR 2019001875W WO 2020101117 A1 WO2020101117 A1 WO 2020101117A1
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WO
WIPO (PCT)
Prior art keywords
frequency
time zone
temperature
switching frequency
time
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2019/001875
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English (en)
Korean (ko)
Inventor
정영수
김민규
안병하
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.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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.)
Filing date
Publication date
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of WO2020101117A1 publication Critical patent/WO2020101117A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • 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
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
    • H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
    • H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2130/00—Control inputs relating to environmental factors not covered by group F24F2110/00
    • F24F2130/20—Sunlight
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states

Definitions

  • the present invention relates to an air conditioner and an operation method thereof, and more particularly, to an air conditioner for reducing noise and an operation method thereof.
  • Inverters are used to obtain alternating current by interrupting direct current according to the on and off of the switch. Specifically, the inverter is used to drive an electric motor used in a compressor, fan, or the like of an air conditioner, or to drive a motor of an electric vehicle.
  • the inverter can vary the switching frequency (or carrier frequency) to drive the motor at any speed, and the switch is turned on and off according to the switching frequency. At this time, noise may be generated by switching on and off.
  • the noise prevention device intends to minimize noise due to the switching frequency by converting the switching frequency to a fan noise frequency of a relatively high energy outdoor fan.
  • the present invention is to provide an air conditioner and a method of operating the same to reduce noise generated when a plurality of switches for driving a motor are turned on and off, and to minimize heat generated when a plurality of switches are turned on and off. .
  • An air conditioner and an operation method thereof minimizes heat generation by lowering switching frequencies controlling a plurality of switches during the daytime, and reducing noise by increasing switching frequencies controlling a plurality of switches during the nighttime. Can be.
  • the air conditioner and its operation method according to an embodiment of the present invention can monitor the heat generation amount by sensing the temperature of the PCB while controlling the switching frequency high for noise reduction.
  • the switching frequency is lowered during the daytime to minimize heat generation, thereby increasing the efficiency, and at the night time, the switching frequency is higher than the audible frequency to minimize noise, thereby minimizing user inconvenience caused by noise.
  • the present invention has the advantage of minimizing damage to the device due to overheating by monitoring the amount of heat generated by a plurality of switches and adjusting the switching frequency.
  • FIG. 1 is a circuit diagram of a power converter of an air conditioner according to an embodiment of the present invention.
  • FIG. 2 is a graph showing efficiency according to a switching frequency according to an embodiment of the present invention.
  • FIG. 3 is a control block diagram of an air conditioner according to an embodiment of the present invention.
  • FIG. 4 is a flowchart illustrating an operation method of an air conditioner according to an embodiment of the present invention.
  • FIG. 5 is a flowchart illustrating a method of performing time zone judgment operation according to a first embodiment of the present invention.
  • FIG. 6 is a flowchart illustrating a method of performing time zone judgment driving according to a second embodiment of the present invention.
  • FIG. 7 is a flowchart illustrating a method of performing time zone judgment driving according to a third embodiment of the present invention.
  • FIG. 1 is a circuit diagram of a power converter of an air conditioner according to an embodiment of the present invention.
  • the power converter 100 shown in FIG. 1 includes a power input unit 1 that receives external power, a converter 2 that converts an AC voltage input from the outside into a DC voltage, and a DC output from the converter 2 It may include a DC link capacitor (3) for smoothing the voltage, and an inverter (10) for switching the output of the DC link capacitor (3) and supplying it to the load (4).
  • the power converter as shown in FIG. 1 is not limited to an air conditioner, and is applicable to electronic devices such as an electric vehicle, and the embodiment of the present invention is not limited to an air conditioner, and a power source such as an electric vehicle It can be applied to all of the electronic devices including the conversion device 100.
  • the power input unit 1 may receive an external three-phase AC voltage.
  • the converter 2 may be connected to the power input unit 1 and receive an AC voltage from the power input unit 1 to rectify the DC voltage.
  • the converter 2 may include at least one of a rectifier, a boost converter, and a reactor according to an embodiment.
  • the DC link capacitor 3 may be connected in parallel between the output terminal of the converter 2 and the input terminal of the inverter 10.
  • the inverter 10 may have one end connected in parallel to the DC link capacitor 3 and the other end connected to the load 4.
  • the load 4 may include a motor of an air conditioner compressor, a motor of an air conditioner outdoor fan, and the like.
  • the inverter 10 may convert the DC voltage smoothed from the DC link capacitor 3 into an AC voltage and supply it to the load 4.
  • the inverter 10 may include a plurality of switches 11 and a driver 12 for turning on and off each of the plurality of switches 11.
  • the inverter 10 may include six switches 11, and the driver 12 may individually control each of the six switches 11 to supply an AC voltage to the load 4.
  • the driving unit 12 may turn each of the plurality of switches 11 on or off based on the switching frequency, and the switch 11 may be turned on or off by the control of the driving unit 12.
  • high frequency noise may be generated when the switch 11 is turned on / off.
  • high-frequency noise may occur at a switching frequency and a frequency that is a multiple of the switching frequency (hereinafter, N times frequency).
  • the human audible frequency is limited from about 16 Hz to about 20 kHz, and the lower the switching frequency, the N times the frequency belonging to the audible frequency increases, and accordingly the noise increases.
  • the N times frequency belonging to the audible frequency decreases, thereby reducing high-frequency noise.
  • the PCB may be a substrate on which at least some or all of the at least one switch 11 and the driver 12 are installed.
  • FIG. 2 is a graph showing efficiency according to a switching frequency according to an embodiment of the present invention.
  • the first graph 201 shown in FIG. 2 shows the efficiency when the switching frequency of the compressor is 5 kHz, and the switching frequency of the outdoor fan is 16 kHz, and the second graph 202 has the switching frequency of the compressor is 7 kHz, outdoor The efficiency when the switching frequency of the fan is 16 kHz, and the third graph 203 shows the efficiency when the switching frequency of the compressor is 7 kHz and the switching frequency of the outdoor fan is 20 kHz.
  • the first graph 201 is the efficiency when the switching frequency is the lowest
  • the third graph 203 is the efficiency when the switching frequency is the highest
  • the second graph 202 is the efficiency of the first graph 201. It may be intermediate between the case and the case of the third graph 203.
  • the present invention is to provide a noise reduction device and a noise reduction method for controlling the switching frequency high by using a point that is quieter than the daytime time zone at a night time zone but has a low outside temperature.
  • FIG. 3 is a control block diagram of an air conditioner according to an embodiment of the present invention.
  • the air conditioner includes a plurality of switches 11 connected to a motor, a driving unit 12 for turning on and off each of the plurality of switches 11, a control unit 50 for controlling the driving unit 12, and determining a time zone It may include at least a part or all of the condition determination unit 20 for the, and the PCB temperature sensor 30 for sensing the temperature of the at least one PCB.
  • FIG. 3 is only illustratively illustrated for convenience of explanation, and the air conditioner according to an embodiment of the present invention may further include other components or omit some of them in addition to the components illustrated in FIG. 3. .
  • the condition determining unit 20 may include at least some or all of the optical sensor 21, the outdoor temperature sensor 22, and the time setting unit 23.
  • the condition determination unit 20 may determine the time zone through at least one of the optical sensor 21, the outdoor temperature sensor 22, and the time setting unit 23.
  • the controller 50 may selectively determine whether the current time is a day time zone or the current time is a night time zone through the condition determining unit 20 to selectively perform the night mode or the day mode.
  • control unit 50 may determine the time zone based on the amount of light sensed by the light sensor 21. This will be described later in detail in FIG. 5.
  • the optical sensor 21 may be installed outside the air conditioner.
  • the optical sensor 21 may be installed on the outer surface of the outdoor unit including a motor connected to a plurality of switches (11).
  • the optical sensor 21 may detect the light received from the outside to calculate the amount of light.
  • control unit 50 may determine the time zone based on the outside temperature detected by the outside temperature sensor 22. This will be described later in detail in FIG. 6.
  • the outside temperature sensor 22 may detect the temperature of the outside air.
  • the outdoor temperature sensor 22 may be installed outside the air conditioner, and similarly to the optical sensor 21, it is preferable to be installed on the outer surface of the outdoor unit including a motor connected to a plurality of switches 11.
  • the outside temperature sensor 22 may detect the outside temperature.
  • control unit 50 may determine the time zone through the time setting unit 23, which will be described later in detail in FIG. 7.
  • the time setting unit 23 may include a communication module (not shown) for receiving current time information from an external server, and compare the received current time with a set time range to determine the time zone.
  • the time setting unit 23 may include an input module (not shown) for receiving current time information from a user, and compare the set time range with the inputted current time to determine the time zone.
  • control unit 50 may determine the time zone by using at least two of the optical sensor 21, the outdoor temperature sensor 22, and the time setting unit 23.
  • the PCB temperature sensor 30 may be a temperature sensor installed in a PCB (not shown), and the controller 50 may monitor the amount of heat generated in the PCB through the PCP temperature sensor 30.
  • the control unit 50 may set the switching frequency based on the time zone determined by the condition determining unit 20 or the temperature detected by the PCB temperature sensor 30, and may control the driving unit 12 based on the set frequency. .
  • FIG. 4 is a flowchart illustrating an operation method of an air conditioner according to an embodiment of the present invention.
  • the control unit 50 may perform a time zone judgment operation (S100).
  • the controller 50 may perform a time zone judgment operation to select one of the night mode and the day mode.
  • the control unit 50 may perform a time zone judgment operation to perform a night mode or a day mode.
  • the night mode may be an operation mode for minimizing noise generation.
  • the day mode may be an operation mode for cooling the heated PCB due to heat or high temperature outside air generated during the night mode.
  • the time zone is divided into a day time zone and a night time zone, but this is merely an example for convenience of time.
  • the control unit 50 may be divided into two or more time zones, and control the switching frequency differently according to each time zone.
  • FIG. 5 is a flowchart illustrating a method of performing time zone judgment operation according to a first embodiment of the present invention.
  • the control unit 50 may detect the amount of light through the optical sensor 21 (S111).
  • the optical sensor 21 can detect the amount of light from the outside.
  • the light sensor 21 may detect the light for a predetermined time to calculate the light amount.
  • a predetermined time for sensing light may be adjusted.
  • the time zone determination accuracy when the light sensor 21 detects the light for the first time and calculates the light amount is higher than the time zone determination accuracy when the light sensor detects the light for the second time less than the first time and calculates the light amount.
  • the optical sensor 21 can detect the light for 10 seconds to calculate the amount of light, but this is only an example.
  • the control unit 50 may compare the sensed light amount of the optical sensor 21 with the reference light amount (S113). The control unit 50 may determine the amount of light sensed by the light sensor 21 to the reference light amount and determine the night time zone or day time zone.
  • the reference light amount is a preset value.
  • the reference light amount may be set to change according to seasonal changes.
  • the reference light amount may be adjusted together when a predetermined time for the light sensor 21 to sense light is adjusted.
  • the controller 50 determines the time zone at night (S115), and if the amount of light sensed from the outside exceeds the reference light amount, the controller 50 may determine the daylight time period (S117).
  • control unit 50 automatically estimates the time zone through the optical sensor 21, there is an advantage that the user does not need to input the time zone separately.
  • FIG. 6 is a flowchart illustrating a method of performing time zone judgment driving according to a second embodiment of the present invention.
  • the control unit 50 may sense the outside temperature through the outside temperature sensor 22 (S121).
  • the control unit 50 may compare the outside temperature detected through the outside temperature sensor 22 with the set temperature (S123).
  • the control unit 50 may determine the night time zone or the daytime zone by comparing the outside temperature detected by the outside temperature sensor 22 with the set temperature.
  • the set temperature is a preset temperature value, and may be changed and set according to seasonal changes.
  • the controller 50 may determine the night time zone (S125), and if the outside temperature exceeds the set temperature, the controller 50 may determine the daytime time zone (S127).
  • control unit 50 automatically estimates the time zone through the outside temperature sensor 22, there is an advantage that the user does not need to input the time zone separately.
  • FIG. 7 is a flowchart illustrating a method of performing time zone judgment driving according to a third embodiment of the present invention.
  • the control unit 50 may receive the current time information through the time setting unit 23 (S131).
  • the control unit 50 may determine whether the current time received through the time setting unit 23 falls within the set time range (S133).
  • the control unit 50 may determine the night time zone or day time zone according to whether the current time received through the time setting unit 23 falls within the set time range. In this case, the control unit 50 may set a time range for distinguishing the night time zone from the night time zone in advance.
  • the controller 50 determines the night time zone (S135), and the control unit 50 receives the current time received through the time setting unit 23. If it does not fall within the set time range, it may be determined as a day time period (S137).
  • control unit 50 may preset 20: 00: 00-06: 59: 59 as a night time range, and the control unit 50 may set the current time to 20: 00: 00-06: 59: 59. If it belongs, it can be judged by the night time zone, and if the current time does not belong to 20: 00: 00-06: 59: 59, it can be judged by the day time zone. Meanwhile, the control unit 50 may set 20: 00: 00-06: 59: 59 as a night time range and simultaneously set 07: 00: 00-19: 59: 59 as a daytime time range.
  • control unit 50 automatically estimates the time zone through the time setting unit 23 since the control unit 50 automatically estimates the time zone through the time setting unit 23, there is an advantage that the user does not need to input the time zone separately.
  • FIG. 4 will be described.
  • the controller 50 may determine whether the time zone is night based on the result of performing the time zone determination operation (S200).
  • controller 50 may perform a daytime mode (S300).
  • control unit 50 may set the switching frequency to the first frequency (S400).
  • the control unit 50 may control the driving unit 12 by setting the switching frequency to the first frequency, and perform the time zone determination operation again. At this time, the control unit 50 may set the switching frequency to the first frequency, and perform a time zone determination operation again after a preset period of time has elapsed.
  • the preset cycle time may be 60 minutes, but this is only exemplary.
  • step S200 if the controller 50 determines the time zone as a night time zone, the night mode may be performed (S500).
  • the controller 50 may set the switching frequency to a second frequency higher than the switching frequency in the day mode (S600).
  • control unit 50 may control the switching frequency to the first frequency when the day mode is performed, and the control unit 50 may set the switching frequency to the second frequency higher than the first frequency when the night mode is performed.
  • the controller 50 may determine each of the first frequency and the second frequency in advance.
  • the controller 50 may determine the first frequency and the second frequency such that a quotient of the result of dividing a specific value by a second frequency is less than a quotient of the result of dividing a specific value by a first frequency.
  • the specific value may be the highest frequency of the audible frequency band.
  • a specific value may be 20 kHz.
  • the first frequency when the load 4 is a compressor motor, the first frequency may be 2 kHz to 5 kHz, and the second frequency may be 6 kHz to 12 kHz.
  • the first frequency when the load 4 is an indoor / outdoor fan motor, the first frequency may be 5 kHz to 16 kHz, and the second frequency may be 16 kHz to 24 kHz.
  • the quotient of the result of dividing 20 kHz by the first frequency means the number of N times frequencies in the audible frequency range when the switching frequency is the first frequency
  • the quotient of the result of dividing 20 kHz by the second frequency is the switching frequency.
  • it may mean the number of N times frequencies belonging to the audible frequency range.
  • the quotient of the result of dividing 20 kHz by the first frequency is 4, and when the switching frequency is the first frequency, the number of N times frequencies in the audible frequency range is equal to 4.
  • the second frequency is 10 kHz
  • the share of the result of dividing 20 kHz by the second frequency is 2
  • the switching frequency is the second frequency
  • the number of N times frequencies belonging to the audible frequency range is equal to 2.
  • the first and second frequencies are determined such that the quotient of the result obtained by dividing 20 kHz by the second frequency is less than the quotient by dividing the 20 kHz by the first frequency, the number of N times frequencies belonging to the audible frequency decreases in the night mode. Therefore, there is an effect of reducing noise.
  • the temperature of the PCB may be monitored through the PCP sensor 30 to minimize damage caused by overheating.
  • the controller 50 may compare the sensing temperature of the PCB temperature sensor 30 with the reference temperature (S700).
  • the controller 50 may return to step S100 to perform the time zone determination operation again.
  • the controller 50 may return to step S400 to perform the night mode again.
  • the control unit 50 may continuously monitor the temperature of the PCB temperature sensor 30 while maintaining the switching frequency at the second frequency. Accordingly, even if the time zone is changed from night to daytime, the switching frequency is maintained at the second frequency while the PCB is not overheated, thereby minimizing the occurrence of noise even during the daytime.
  • step S700 the controller 50 may perform step S300 when the detected temperature of the PCB temperature sensor 30 exceeds the reference temperature.
  • the controller 50 may switch from the night mode to the day mode, and convert the switching frequency from the second frequency to the first frequency.
  • a high switching frequency prevents overheating of the PCB, and has the advantage of minimizing the possibility of burnout.
  • the control unit 50 may block the execution of the night mode within a set time. Specifically, when the switching frequency is converted from the second frequency to the first frequency based on the temperature of the PCB, the control unit 50 may block a case where the switching frequency is set again in the second time period within a set time. The controller 50 may set the switching frequency as the first frequency based on the temperature of the PCB, and then perform the time zone determination operation within the set time to maintain the switching frequency at the first frequency even when determined in the second time zone.
  • the setting time may be 60 minutes, but this is only exemplary.
  • control unit 50 minimizes the case in which the switching frequency is set to the second frequency before the heat of the PCB is released after converting the switching frequency from the second frequency to the first frequency to prevent overheating of the PCB. , It has the advantage of effectively minimizing the case where the PCB is overheated.
  • FIG. 8 is a spectrum of an audio signal around the air conditioner when the switching frequency is 5 kHz
  • FIG. 9 is a spectrum of an audio signal around the air conditioner when the switching frequency is 10 kHz.
  • the switching frequency is 5 kHz
  • the area in the spectrum of the audio signal is wider than the area in the spectrum of the audio signal when the switching frequency is 10 kHz.
  • the noise level is 10 kHz. It can be seen that it is larger than the noise level in the case of. In this way, the noise reduction effect can be confirmed by increasing the switching frequency.
  • the switching frequency is controlled at high levels without distinction between daytime and nighttime, noise can be reduced all the time, but because the PCB can be burned out and burned out, switching is done only at nighttime in consideration of the fact that there are more living noises than daytime.
  • By increasing the frequency there is an advantage of minimizing heat generation problems and securing product reliability.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

La présente invention concerne un climatiseur permettant de réduire le bruit et un procédé de fonctionnement associé, le climatiseur comprenant : un moteur ; une pluralité de commutateurs connectés au moteur ; une partie d'entraînement destiné à activer ou à désactiver chaque commutateur, parmi la pluralité de commutateurs, en fonction d'une fréquence de commutation ; et une partie de commande destinée à commander de façon variable la fréquence de commutation en fonction d'une plage horaire.
PCT/KR2019/001875 2018-11-13 2019-02-15 Climatiseur et procédé de fonctionnement associé Ceased WO2020101117A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2018-0138833 2018-11-13
KR1020180138833A KR102186423B1 (ko) 2018-11-13 2018-11-13 공기조화기 및 그의 동작 방법

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WO2020101117A1 true WO2020101117A1 (fr) 2020-05-22

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KR102795889B1 (ko) * 2021-02-08 2025-04-17 현대자동차주식회사 차량용 충전 장치 및 그 충전 방법
CN119737669A (zh) * 2024-11-12 2025-04-01 珠海格力电器股份有限公司 一种空调控制方法、装置、系统、电子设备及空调

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