WO2017202198A1 - Système multi-split et procédé de commande d'élément d'étranglement de chauffage associé - Google Patents

Système multi-split et procédé de commande d'élément d'étranglement de chauffage associé Download PDF

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Publication number
WO2017202198A1
WO2017202198A1 PCT/CN2017/083654 CN2017083654W WO2017202198A1 WO 2017202198 A1 WO2017202198 A1 WO 2017202198A1 CN 2017083654 W CN2017083654 W CN 2017083654W WO 2017202198 A1 WO2017202198 A1 WO 2017202198A1
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WIPO (PCT)
Prior art keywords
compressor
pressure
heating
pressure difference
target
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/CN2017/083654
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English (en)
Chinese (zh)
Inventor
罗彬�
李元阳
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 Heating and Ventilating Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
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Publication date
Application filed by Midea Group Co Ltd, GD Midea Heating and Ventilating Equipment Co Ltd filed Critical Midea Group Co Ltd
Priority to EP17802044.2A priority Critical patent/EP3467390B1/fr
Publication of WO2017202198A1 publication Critical patent/WO2017202198A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
    • 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
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • 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
    • 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
    • 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
    • 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
    • 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
    • F25B2400/00—Component parts or details not otherwise provided for in this subclass
    • F25B2400/23—Separators
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2509—Economiser valves

Definitions

  • the invention relates to the technical field of air conditioners, in particular to a control method of a heating throttling element in a multi-line system and a multi-line system.
  • the multi-line system has four modes: pure cooling, pure heating, main cooling, and main heating.
  • the main cooling mode and the main heating mode can simultaneously utilize the system's condensation heat and evaporation heat to achieve simultaneous cooling and heating, which greatly improves the system energy efficiency.
  • the high-pressure gas of the high-pressure pipe of the outdoor unit enters the heating indoor unit, and after the heating indoor unit releases heat, it expands into a low-pressure gas through the electronic expansion valve and returns to the outdoor unit.
  • the opening degree of the electronic expansion valve will affect the flow rate of the refrigerant entering the heating indoor unit, and also adjust the condensation temperature of the heating indoor unit. The proper opening degree will make the heating indoor unit have both higher refrigerant flow rate and also Higher condensation temperature, which results in higher heat production.
  • an object of the present invention is to provide a control method for a heating throttling element in a multi-line system, which adjusts the opening degree of the heating throttling element by the pressure difference between the high and medium pressures of the flow dividing device, so as to
  • the on-line system not only meets the liquid discharge requirements, but also has good performance and energy efficiency during heating, especially during partial load heating, and improves the user experience.
  • Another object of the present invention is to provide a non-transitory computer readable storage medium.
  • Yet another object of the present invention is to provide a multi-line system.
  • an embodiment of the present invention provides a method for controlling a heating throttle element in a multi-line system, the multi-line system including an outdoor unit, a flow dividing device, and a plurality of indoor units, the outdoor unit including a compressor, the flow dividing device comprising a first heat exchanger, a second heat exchanger and a heating throttle element, an outlet of the first heat exchange flow path of the first heat exchanger and the second heat exchanger An inlet of the first heat exchange passage is in communication, and an outlet of the second heat exchange passage of the second heat exchanger is in communication with an inlet of the second heat exchange passage of the first heat exchanger, A heating throttling element is disposed between an outlet of the first heat exchange passage of the second heat exchanger and an inlet of the second heat exchange passage of the second heat exchanger, the method comprising the steps of: Obtaining a target exhaust pressure of the compressor or a saturation temperature corresponding to the target exhaust pressure; controlling the compressor according to the target exhaust pressure or a saturation temperature corresponding to the target exhaust
  • the target exhaust pressure of the compressor or the saturation temperature corresponding to the target exhaust pressure is acquired, and then corresponding to the target exhaust pressure or the target exhaust pressure.
  • the saturation temperature controls the compressor to stabilize the compressor, and obtains the high pressure and medium pressure of the flow dividing device after the compressor is stably operated, and calculates the pressure difference between the high pressure and the medium pressure, and finally obtains
  • the target pressure difference between the high pressure and the medium pressure of the flow dividing device, and the opening of the heating throttle element is adjusted according to the pressure difference and the target pressure difference, so that the multi-line system is heated, especially It is a part load heating system that not only meets the liquid discharge requirements, but also has good performance and energy efficiency to improve the user experience.
  • adjusting the opening degree of the heating and throttling element according to the pressure difference value and the target pressure difference value comprising: if the pressure difference value is greater than the target pressure difference value And controlling the opening degree of the heating and throttling element; if the pressure difference is smaller than the target pressure difference, the opening degree of the heating and throttling element is controlled.
  • the method further includes: determining whether the pressure difference value is equal to the target pressure difference value, and determining the current state of the compressor Whether the saturation temperature corresponding to the exhaust pressure is greater than or equal to a saturation temperature corresponding to the target exhaust pressure of the compressor, and determining whether the operating frequency of the compressor is greater than or equal to the maximum frequency; if the pressure difference is equal to the target pressure
  • the difference, or the saturation temperature corresponding to the current exhaust pressure of the compressor is greater than or equal to a saturation temperature corresponding to the target exhaust pressure of the compressor, or the operating frequency of the compressor is greater than or equal to the maximum frequency, then controlling The opening of the heating and throttling element remains unchanged.
  • the saturation temperature corresponding to the current exhaust pressure of the compressor is less than the saturation temperature corresponding to the target exhaust pressure of the compressor.
  • the operating frequency of the compressor is less than the maximum frequency, the operating frequency of the compressor is adjusted, and the opening degree of the heating and throttling element is adjusted according to the adjusted operating frequency of the compressor .
  • the multi-line system operates in a heating mode, a main heating mode or a main cooling mode.
  • the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program, the program being implemented by the processor to implement the control method of the heating throttling element in the multi-line system described above .
  • the non-transitory computer readable storage medium of the embodiment of the present invention adjusts the heating throttling element according to the pressure difference between the high and medium pressures of the flow dividing device by performing the above-described control method of the heating throttling element in the multi-line system
  • the degree of opening is such that when the multi-line system is heated, especially when partially loaded, it can meet the liquid discharge requirements, has good performance and energy efficiency, and improves the user experience.
  • another embodiment of the present invention provides a multi-line system, including: an outdoor unit, the outdoor unit includes a compressor, a plurality of indoor units, a flow dividing device, and the flow dividing device includes a first heat exchange a second heat exchanger and a heating and throttling element, wherein an outlet of the first heat exchange passage of the first heat exchanger is in communication with an inlet of the first heat exchange passage of the second heat exchanger, An outlet of the second heat exchange passage of the second heat exchanger is in communication with an inlet of the second heat exchange passage of the first heat exchanger, and the heating throttle element is disposed at the second exchange Between the outlet of the first heat exchange flow path of the heat exchanger and the inlet of the second heat exchange flow path of the second heat exchanger; a control module for obtaining a target exhaust pressure of the compressor Or the saturation temperature corresponding to the target exhaust pressure, and controlling the compressor according to the target exhaust pressure or a saturation temperature corresponding to the target exhaust pressure to stabilize the compressor, and Obtaining the high
  • the control module first acquires the target exhaust pressure of the compressor or the saturation temperature corresponding to the target exhaust pressure, and performs the compressor on the compressor according to the target exhaust pressure or the saturation temperature corresponding to the target exhaust pressure. Control to stabilize the compressor and obtain the high pressure and medium pressure of the flow dividing device after the compressor is stably operated. Then, the control module calculates the pressure difference between the high pressure and the medium pressure, and obtains the high pressure of the flow dividing device.
  • the target pressure difference between the pressure and the medium pressure, and the opening of the heating throttle element according to the pressure difference and the target pressure difference so that the multi-line system is heated, especially the partial load system When it is hot, it can meet the drainage requirements, but also has good performance and energy efficiency.
  • the control module adjusts the opening degree of the heating and throttling element according to the pressure difference value and the target pressure difference value, wherein if the pressure difference is greater than Determining the target pressure difference, the control module performing a small control on the opening of the heating throttle element; if the pressure difference is less than the target pressure difference, the control module is The opening of the thermal throttling element is controlled by an increase.
  • the control module further determines whether the pressure difference is equal to the target pressure difference, and determines the compression. Whether the saturation temperature corresponding to the current exhaust pressure of the machine is greater than or equal to a saturation temperature corresponding to the target exhaust pressure of the compressor, and determining whether the operating frequency of the compressor is greater than or equal to the maximum frequency, and the pressure difference is equal to The target pressure difference, or a saturation temperature corresponding to a current exhaust pressure of the compressor, is greater than or equal to a saturation temperature corresponding to a target exhaust pressure of the compressor, or an operating frequency of the compressor is greater than or equal to the maximum At the frequency, the opening of the heating and throttling element is controlled to remain unchanged.
  • the saturation temperature corresponding to the current exhaust pressure of the compressor is less than the saturation temperature corresponding to the target exhaust pressure of the compressor.
  • the operating frequency of the compressor is less than the maximum frequency, and the control module adjusts the operating frequency of the compressor, and adjusts the opening degree of the heating and throttling element according to the adjusted operating frequency of the compressor.
  • the multi-line system operates in a heating mode, a main heating mode or a main cooling mode.
  • FIG. 1 is a block diagram showing the structure of a multi-line system according to an embodiment of the present invention.
  • FIG. 2 is a flow chart of a method of controlling a heating throttle element in a multiple-line system in accordance with an embodiment of the present invention.
  • FIG. 3 is a flow chart of a method of controlling a heating throttle element in a multiple-line system in accordance with one embodiment of the present invention.
  • outdoor unit 10 a plurality of indoor units 20, a flow dividing device 30, a gas-liquid separator 31, a first heat exchanger 32, a second heat exchanger 33, a first throttle element 34, and a heating throttle element 35.
  • the multi-line system includes an outdoor unit, a flow dividing device, and a plurality of indoor units
  • the outdoor unit includes a compressor
  • the flow dividing device includes a first heat exchanger, a second heat exchanger, and a heating throttle element.
  • An outlet of the first heat exchange passage of the first heat exchanger is in communication with an inlet of the first heat exchange passage of the second heat exchanger, and an outlet of the second heat exchange passage of the second heat exchanger is first exchanged
  • An inlet of the second heat exchange passage of the heat exchanger is in communication
  • the heating throttle element is disposed at an inlet of the first heat exchange passage of the second heat exchanger and an inlet of the second heat exchange passage of the second heat exchanger between.
  • the multi-line system includes an outdoor unit 10 , a plurality of indoor units 20 , and a flow dividing device 30 .
  • the outdoor unit 10 includes a compressor (not specifically shown), and the flow dividing device 30 includes gas and liquid.
  • the separator 31 the first heat exchanger 32, the second heat exchanger 33, the first throttle element 34, and the heating throttle element 35.
  • the first end of the gas-liquid separator 31 is connected to one end of the outdoor unit 10.
  • the second end of the gas-liquid separator 31 is in communication with the inlet of the first heat exchange passage of the first heat exchanger 32, and the first throttle element 34 is disposed at the first heat exchange passage of the first heat exchanger 32.
  • the outlet is between the inlet of the first heat exchange passage of the second heat exchanger 33.
  • the heating throttle element 35 is disposed between the outlet of the first heat exchange passage of the second heat exchanger 33 and the inlet of the second heat exchange passage of the second heat exchanger 33, and the second heat exchanger 33
  • the outlet of the second heat exchange flow path is in communication with the inlet of the second heat exchange flow path of the first heat exchanger 32, and the outlet of the second heat exchange flow path of the first heat exchanger 32 is respectively connected to the other end of the outdoor unit 10
  • One end of the refrigeration indoor unit is connected.
  • Refrigeration indoor unit The other end is in communication with the outlet of the first heat exchange path of the second heat exchanger 33, and the third end of the gas-liquid separator 31 is connected to one end of the heating indoor unit, and the other end of the heating indoor unit is second
  • the inlets of the first heat exchange passages of the heat exchanger 33 are in communication.
  • the first throttle element and the heating throttle element may be electronic expansion valves, and the first heat exchanger and the second heat exchanger may be plate heat exchangers.
  • Tps2 is the middle of the diverting device
  • the opening degree of the heating throttling element is too large, the pressure difference between the inlet and outlet of the heating indoor unit will become large, and the flow rate and flow rate of the refrigerant entering the heating indoor unit will increase, although the heating indoor unit at this time
  • the liquid storage is not easy to occur, but the outlet supercooling degree of the heating indoor unit is too small, and the pre-chamber subcooling degree SCm2 of the heating and throttling element is too small, and there may be gas in front of the valve, resulting in system instability.
  • the opening of the heating throttling element is too large, which will cause the operating frequency of the compressor to increase, the energy efficiency of the system to be lowered, and the high pressure may not rise, and the exhaust superheat of the compressor may be relatively low.
  • the heating element does not have liquid accumulation, the opening of the heating throttling element is relatively small. At this time, the exhaust superheat of the compressor is relatively high, the high pressure is relatively high, and the operating frequency of the compressor is relatively low.
  • FIG. 2 is a flow chart of a method of controlling a heating throttle element in a multiple-line system in accordance with an embodiment of the present invention. As shown in FIG. 2, the control method of the heating throttling element in the multi-line system includes the following steps:
  • the exhaust pressure Pc of the compressor is obtained in real time through a pressure sensor disposed at an exhaust port of the compressor, or is acquired After the exhaust pressure Pc of the compressor, the saturation temperature Tc corresponding to the exhaust pressure is acquired based on the exhaust pressure Pc. Then, according to the exhaust pressure Pc of the compressor (or the saturation temperature Tc corresponding to the exhaust pressure) and the target exhaust pressure Pcs (or the target exhaust pressure) The difference between the saturation temperatures Tcs) is PI (Proportional Integral) adjustment of the operating frequency of the compressor to obtain the new compressor discharge pressure Pc (or exhaust pressure) after the compressor is stably operated.
  • PI Proportional Integral
  • the high pressure Ps1 can be obtained by a pressure sensor disposed at the outlet of the first heat exchange path of the first heat exchanger of the flow dividing device, and the medium pressure Ps2 can be passed through the first change of the second heat exchanger. Pressure sensor detection at the inlet of the heat flow path is obtained.
  • the target pressure difference ⁇ Ps is the pressure difference between the high pressure and the medium pressure of the flow dividing device obtained by the experimental verification, and the target pressure difference ⁇ Ps is generally small. It can guarantee the system refrigerant flow rate and meet the high pressure value.
  • the opening of the heating throttle element is adjusted according to the pressure difference value and the target pressure difference, including: if the pressure difference is greater than the target pressure difference, opening the heating throttle element The degree is controlled by the small adjustment; if the pressure difference is smaller than the target pressure difference, the opening degree of the heating throttle element is controlled.
  • the heating throttle is performed on the premise that the compressor is adjusted to obtain the exhaust pressure Pc of the new compressor (or the saturation temperature Tc corresponding to the exhaust pressure), and the high pressure Ps1 and the intermediate pressure Ps2. From the initial opening degree, the element performs PI adjustment based on the pressure difference ⁇ P between the high pressure pressure Ps1 and the intermediate pressure Ps2 and the target pressure difference ⁇ Ps.
  • ⁇ P ⁇ ⁇ Ps the opening degree of the heating throttle element is increased, and at this time, the exhaust pressure Pc of the compressor (or the saturation temperature Tc corresponding to the exhaust pressure) is lowered, and ⁇ P is increased due to an increase in the flow rate.
  • the method further comprises: determining whether the pressure difference is equal to the target pressure difference, and determining whether the saturation temperature corresponding to the current exhaust pressure of the compressor is And greater than or equal to the saturation temperature corresponding to the target exhaust pressure of the compressor, and determining whether the operating frequency of the compressor is greater than or equal to the maximum frequency; if the pressure difference is equal to the target pressure difference, or the saturation temperature corresponding to the current exhaust pressure of the compressor is greater than When the saturation temperature corresponding to the target exhaust pressure of the compressor is equal, or the operating frequency of the compressor is greater than or equal to the maximum frequency, the opening of the control heating throttle element remains unchanged.
  • the saturation temperature corresponding to the current exhaust pressure of the compressor is less than the saturation temperature corresponding to the target exhaust pressure of the compressor, and the operating frequency of the compressor is less than the maximum frequency, then the compressor The operating frequency is adjusted, and the opening of the heating throttle element is adjusted according to the adjusted operating frequency of the compressor.
  • FIG. 3 is a flowchart of a method of controlling a heating throttle element in a multiple-line system according to a specific example of the present invention.
  • control method of the heating throttling element in the multi-line system may include the following steps:
  • the operating frequency of the compressor is adjusted according to the difference between the exhaust pressure Pc (or the saturation temperature Tc corresponding to the exhaust pressure) and the target exhaust pressure Pcs (or the saturation temperature Tcs corresponding to the target exhaust pressure).
  • a new exhaust pressure Pc (or a saturation temperature Tc corresponding to the exhaust pressure), a high pressure Ps1, and a medium pressure Ps2 are obtained.
  • the heating throttling element is stabilized at the opening, and the system is stable.
  • control method of the heating throttling element in the multi-line system first acquires the target exhaust pressure of the compressor or the saturation temperature corresponding to the target exhaust pressure, and then according to the target exhaust pressure or The saturation temperature corresponding to the target exhaust pressure controls the compressor to stabilize the compressor, and obtains the high pressure and medium pressure of the flow dividing device after the compressor is stably operated, and calculates the pressure between the high pressure and the medium pressure.
  • the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program that, when executed by the processor, implements the control method of the heating throttling element in the multi-line system described above.
  • the non-transitory computer readable storage medium of the embodiment of the present invention adjusts the heating throttling element according to the pressure difference between the high and medium pressures of the flow dividing device by performing the above-described control method of the heating throttling element in the multi-line system
  • the degree of opening is such that when the multi-line system is heated, especially when partially loaded, it can meet the liquid discharge requirements, has good performance and energy efficiency, and improves the user experience.
  • the multi-line system includes an outdoor unit 10, a plurality of indoor units 20, a flow dividing device 30, and a control module (not specifically shown in the drawings).
  • the outdoor unit 10 includes a compressor (not specifically shown), and the flow dividing device 30 includes a first heat exchanger 32, a second heat exchanger 33 and a heating and throttling element 35, the outlet of the first heat exchange passage of the first heat exchanger 32 is in communication with the inlet of the first heat exchange passage of the second heat exchanger 33, and the second exchange
  • the outlet of the second heat exchange passage of the heat exchanger 33 is in communication with the inlet of the second heat exchange passage of the first heat exchanger 32, and the first heat exchange of the heating throttle element 35 at the second heat exchanger 33 is provided.
  • the outlet of the flow path is between the inlet of the second heat exchange flow path of the second heat exchanger 33.
  • control module configured to acquire a target exhaust pressure of the compressor or a saturation temperature corresponding to the target exhaust pressure, and control the compressor according to the target exhaust pressure or a saturation temperature corresponding to the target exhaust pressure to stabilize the compressor Running, and obtaining the high pressure and the intermediate pressure of the flow dividing device 30 after the compressor is stably operated, the control module calculates the pressure difference between the high pressure and the medium pressure, and obtains the high pressure and the medium pressure of the flow dividing device 30.
  • the target pressure difference between the two, and the opening of the heating and throttling element 35 are adjusted according to the pressure difference and the target pressure difference.
  • the target pressure difference is obtained by experimental verification to obtain a pressure difference between the high pressure and the medium pressure of the flow dividing device in the absence of liquid accumulation, and the target pressure difference is generally small to ensure system refrigerant flow. And meet the value of high pressure.
  • the control module adjusts the opening degree of the heating throttle element according to the pressure difference value and the target pressure difference, wherein if the pressure difference is greater than the target pressure difference, the control module controls the heating The opening degree of the throttle element 35 is controlled to be small; if the pressure difference is smaller than the target pressure difference, the control module controls the opening of the heating throttle element 35 to be increased.
  • the control module when the multi-line system heating (including the multi-line system operating in the heating mode, the main heating mode, or the main cooling mode), especially under partial load heating, the control module first passes through the exhaust gas disposed in the compressor.
  • the pressure sensor at the mouth acquires the exhaust pressure Pc of the compressor in real time, or acquires the saturation temperature Tc corresponding to the exhaust pressure based on the exhaust pressure Pc after acquiring the exhaust pressure Pc of the compressor.
  • the control module compares the difference between the exhaust pressure Pc of the compressor (or the saturation temperature Tc corresponding to the exhaust pressure) and the target exhaust pressure Pcs (or the saturation temperature Tcs corresponding to the target exhaust pressure) to the compressor.
  • the operating frequency is subjected to PI adjustment to obtain a new compressor discharge pressure Pc (or a saturation temperature Tc corresponding to the exhaust pressure), and a high pressure pressure Ps1 and an intermediate pressure Ps2 of the flow dividing device 30 after the compressor is stably operated.
  • the high pressure Ps1 can be detected by a pressure sensor disposed at the outlet of the first heat exchange path of the first heat exchanger 32 of the flow dividing device 30, and the medium pressure Ps2 can be passed through the second heat exchanger 33.
  • a pressure sensor at the inlet of the first heat exchange flow path is detected.
  • the control module Under the premise that the compressor is adjusted to obtain the exhaust pressure Pc of the new compressor (or the saturation temperature Tc corresponding to the exhaust pressure), and the high pressure pressure Ps1 and the intermediate pressure Ps2, the control module according to the high pressure Ps1 and the middle
  • the pressure difference ⁇ P between the pressures Ps2 and the target pressure difference ⁇ Ps are PI-adjusted from the initial opening degree by the heating throttle element 35.
  • the control module controls the opening degree of the heating throttle element 35 to be small, at which time the exhaust pressure Pc of the compressor (or the saturation temperature Tc corresponding to the exhaust pressure) rises, and the flow rate decreases, ⁇ P become smaller.
  • the control module controls the opening degree of the heating throttle element 35 to be large, at which time the discharge pressure Pc of the compressor (or the saturation temperature Tc corresponding to the exhaust pressure) is decreased, and ⁇ P is increased due to the flow rate. Become bigger.
  • the control module after the control module adjusts the opening degree of the heating throttle element 35, it also determines Determining whether the pressure difference is equal to the target pressure difference, and determining whether the saturation temperature corresponding to the current exhaust pressure of the compressor is greater than or equal to the saturation temperature corresponding to the target exhaust pressure of the compressor, and determining whether the operating frequency of the compressor is greater than or equal to the maximum Frequency, and when the pressure difference is equal to the target pressure difference, or the saturation temperature corresponding to the current exhaust pressure of the compressor is greater than or equal to the saturation temperature corresponding to the target exhaust pressure of the compressor, or the operating frequency of the compressor is greater than or equal to the maximum frequency
  • the opening of the control heating throttle element 35 remains unchanged.
  • the control module compresses The operating frequency of the machine is adjusted, and the opening degree of the heating throttle element 35 is adjusted according to the operating frequency of the adjusted compressor.
  • the control module first acquires the target exhaust pressure of the compressor or the saturation temperature corresponding to the target exhaust pressure, and performs the compressor on the compressor according to the target exhaust pressure or the saturation temperature corresponding to the target exhaust pressure. Control to stabilize the compressor and obtain the high pressure and medium pressure of the flow dividing device after the compressor is stably operated. Then, the control module calculates the pressure difference between the high pressure and the medium pressure, and obtains the high pressure of the flow dividing device.
  • the target pressure difference between the pressure and the medium pressure, and the opening of the heating throttle element according to the pressure difference and the target pressure difference so that the multi-line system is heated, especially the partial load system When it is hot, it can meet the drainage requirements, but also has good performance and energy efficiency.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” or “second” may include at least one of the features, either explicitly or implicitly.
  • the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.
  • the terms “installation”, “connected”, “connected”, “fixed” and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. , or integrated; can be mechanical or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction of two elements, unless otherwise specified Limited.
  • the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
  • a "computer-readable medium” can be any apparatus that can contain, store, communicate, propagate, or transport a program for use in an instruction execution system, apparatus, or device, or in conjunction with the instruction execution system, apparatus, or device.
  • computer readable media include the following: electrical connections (electronic devices) having one or more wires, portable computer disk cartridges (magnetic devices), random access memory (RAM), Read only memory (ROM), erasable editable read only memory (EPROM or flash memory), fiber optic devices, and portable compact disk read only memory (CDROM).
  • the computer readable medium may even be a paper or other suitable medium on which the program can be printed, as it may be optically scanned, for example by paper or other medium, followed by editing, interpretation or, if appropriate, other suitable The method is processed to obtain the program electronically and then stored in computer memory.
  • portions of the invention may be implemented in hardware, software, firmware or a combination thereof.
  • multiple steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system.
  • a suitable instruction execution system For example, if implemented in hardware and in another embodiment, it can be implemented by any one or combination of the following techniques well known in the art: discrete with logic gates for implementing logic functions on data signals Logic circuits, application specific integrated circuits with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), and the like.

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Abstract

La présente invention concerne un procédé de commande d'un élément d'étranglement de chauffage (35) dans un système multisplit qui comprend : l'obtention d'une pression de décharge de gaz cible d'un compresseur, ou une température de saturation correspondant à la pression de décharge de gaz cible (S1); la commande du compresseur en fonction de la pression de décharge de gaz cible ou de la température de saturation correspondant à la pression de décharge de gaz cible afin de permettre au compresseur de fonctionner de façon stable, l'obtention d'une pression élevée et d'une pression intermédiaire d'un dispositif de dérivation (30) une fois que le fonctionnement du compresseur devient stable, et le calcul d'une différence de pression entre la pression élevée et la pression intermédiaire (S2); et l'obtention d'une différence de pression cible entre la pression élevée et la pression intermédiaire du dispositif de dérivation (30), et l'ajustement d'un degré d'ouverture de l'élément d'étranglement de chauffage (35) en fonction de la différence de pression et de la différence de pression cible. L'invention concerne en outre un système multisplit appliquant le procédé de commande de l'élément d'étranglement de chauffage.
PCT/CN2017/083654 2016-05-23 2017-05-09 Système multi-split et procédé de commande d'élément d'étranglement de chauffage associé Ceased WO2017202198A1 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114061107A (zh) * 2021-12-27 2022-02-18 上海美控智慧建筑有限公司 一种多联机空调系统的控制方法及系统
CN117553414A (zh) * 2022-08-03 2024-02-13 青岛海尔空调电子有限公司 用于控制多联机空调的方法及装置、多联机空调、存储介质
CN119468459A (zh) * 2024-12-24 2025-02-18 青岛海信日立空调系统有限公司 多联机系统

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106016457B (zh) * 2016-05-23 2018-12-18 广东美的暖通设备有限公司 多联机系统及其制热节流元件的控制方法
CN106556113B (zh) * 2016-11-28 2019-07-26 广东美的暖通设备有限公司 多联机系统及其的中压节流元件的控制方法
CN107576110B (zh) * 2017-09-08 2019-12-27 合肥美的暖通设备有限公司 多联机系统及其控制方法和控制装置
CN110360704A (zh) * 2018-04-09 2019-10-22 珠海格力电器股份有限公司 空调连接管压力损耗补偿方法及装置
CN111473466B (zh) * 2020-04-21 2022-03-22 宁波奥克斯电气股份有限公司 一种频率控制方法及空调器
CN111578472B (zh) * 2020-05-29 2022-03-22 广东美的制冷设备有限公司 空调器室外机的控制方法及装置、空调器室外机及空调器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3849467B2 (ja) * 2001-07-11 2006-11-22 松下電器産業株式会社 空気調和機
CN101881498A (zh) * 2009-05-06 2010-11-10 欧威尔空调(中国)有限公司 多联式空调系统的控制方法和系统
JP4888256B2 (ja) * 2007-06-29 2012-02-29 ダイキン工業株式会社 冷凍装置
CN103486700A (zh) * 2012-06-14 2014-01-01 珠海格力电器股份有限公司 一种空调器及其控制方法
CN104266407A (zh) * 2014-10-21 2015-01-07 王仕相 空气源热泵机组
CN106016457A (zh) * 2016-05-23 2016-10-12 广东美的暖通设备有限公司 多联机系统及其制热节流元件的控制方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100220726B1 (ko) * 1997-02-11 1999-09-15 윤종용 멀티 에어콘
JPH1194384A (ja) * 1997-09-26 1999-04-09 Mitsubishi Heavy Ind Ltd 多室形空気調和装置
KR20060030761A (ko) * 2004-10-06 2006-04-11 삼성전자주식회사 다실형 공기조화 시스템 및 그 제어방법
WO2014038059A1 (fr) * 2012-09-07 2014-03-13 三菱電機株式会社 Appareil de climatisation
JP5759080B2 (ja) * 2012-10-01 2015-08-05 三菱電機株式会社 空気調和装置
WO2014054120A1 (fr) * 2012-10-02 2014-04-10 三菱電機株式会社 Appareil de conditionnement d'air
JP6223469B2 (ja) * 2013-12-25 2017-11-01 三菱電機株式会社 空気調和装置
WO2016009488A1 (fr) * 2014-07-14 2016-01-21 三菱電機株式会社 Appareil de climatisation
CN104748430B (zh) * 2015-03-31 2018-02-06 广东美的暖通设备有限公司 多联机系统
CN104896675B (zh) * 2015-06-12 2017-12-08 广东美的暖通设备有限公司 多联机系统的回气过热度测试方法和多联机系统

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3849467B2 (ja) * 2001-07-11 2006-11-22 松下電器産業株式会社 空気調和機
JP4888256B2 (ja) * 2007-06-29 2012-02-29 ダイキン工業株式会社 冷凍装置
CN101881498A (zh) * 2009-05-06 2010-11-10 欧威尔空调(中国)有限公司 多联式空调系统的控制方法和系统
CN103486700A (zh) * 2012-06-14 2014-01-01 珠海格力电器股份有限公司 一种空调器及其控制方法
CN104266407A (zh) * 2014-10-21 2015-01-07 王仕相 空气源热泵机组
CN106016457A (zh) * 2016-05-23 2016-10-12 广东美的暖通设备有限公司 多联机系统及其制热节流元件的控制方法

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114061107A (zh) * 2021-12-27 2022-02-18 上海美控智慧建筑有限公司 一种多联机空调系统的控制方法及系统
CN114061107B (zh) * 2021-12-27 2023-11-28 上海美控智慧建筑有限公司 一种多联机空调系统的控制方法及系统
CN117553414A (zh) * 2022-08-03 2024-02-13 青岛海尔空调电子有限公司 用于控制多联机空调的方法及装置、多联机空调、存储介质
CN119468459A (zh) * 2024-12-24 2025-02-18 青岛海信日立空调系统有限公司 多联机系统
CN119468459B (zh) * 2024-12-24 2025-11-28 青岛海信日立空调系统有限公司 多联机系统

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EP3467390A1 (fr) 2019-04-10

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