WO2021093228A1 - Système de pompe à chaleur et son procédé de commande - Google Patents

Système de pompe à chaleur et son procédé de commande Download PDF

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Publication number
WO2021093228A1
WO2021093228A1 PCT/CN2020/078069 CN2020078069W WO2021093228A1 WO 2021093228 A1 WO2021093228 A1 WO 2021093228A1 CN 2020078069 W CN2020078069 W CN 2020078069W WO 2021093228 A1 WO2021093228 A1 WO 2021093228A1
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Prior art keywords
refrigerant
heat exchanger
temperature
pump system
heat pump
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PCT/CN2020/078069
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English (en)
Chinese (zh)
Inventor
程威
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广东美的暖通设备有限公司
美的集团股份有限公司
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Publication of WO2021093228A1 publication Critical patent/WO2021093228A1/fr

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    • 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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • 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
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/008—Refrigerant heaters
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/31—Low ambient temperatures
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures

Definitions

  • This application relates to the technical field of refrigeration equipment, and in particular to a heat pump system and a control method of the heat pump system.
  • the refrigerant absorbs heat from the outdoor air through the outdoor heat exchanger, and then increases the pressure and temperature through the compressor, and transfers the heat from the outdoor side to the room to achieve the heating effect.
  • the lower the outdoor temperature the less heat that can be transported from the outside to the room, and the worse the heating effect of the indoor air conditioner; and the refrigerant in the outdoor heat exchanger needs to absorb outdoor air.
  • the temperature needs to be lowered to the temperature of the outdoor air, which will cause the outdoor heat exchanger to frost in the heating mode. After frost, defrost is required to ensure the continuous and stable operation of the system.
  • the unit when the unit is heating and starting at low temperature, due to the high solubility of oil in the refrigerant at low temperature, it also requires a long-term preheating of the compressor to increase the temperature of the refrigerant discharged from the compressor and ensure that the refrigerant and oil are carried out in the oil. Efficient separation, the oil returns to the compressor through the oil, and the refrigerant goes to the indoor side for condensation and heat release, so as to ensure the reliability of the compressor while taking into account the indoor heating effect.
  • the heating source of the refrigerant heater can use various heating methods such as thick film heating, PTC electric heating, and electromagnetic heating. Faster, if the temperature is not well controlled, it may have a failure effect on the oil and other components in the system.
  • the present application provides a control method of a heat pump system.
  • the control method of the heat pump system has the advantages of good stability and high safety.
  • the present application provides a heat pump system, which has the advantages of good stability and high safety.
  • the heat pump system includes: a compressor, the compressor having an exhaust port; an oil separator, the oil separator having an oil inlet; a refrigerant heater, the refrigerant The heater has a refrigerant inlet and a refrigerant outlet, the refrigerant inlet is in communication with the exhaust port, the refrigerant outlet is in communication with the oil inlet, and a temperature sensor for detecting the temperature of the refrigerant heater; a controller, the The controller is in communication connection with the temperature sensor; the outdoor ambient temperature is set to T0, and in the heating mode, the temperature at the refrigerant heater is preset to T,
  • the control method includes:
  • the refrigerant heater is connected between the compressor and the oil separator, and the compressor and the refrigerant heater are controlled to start according to the outdoor ambient temperature.
  • the refrigerant heater is turned on, and the compressor does not need to be preheated, and it starts directly at high frequency, which can speed up the heat pump system startup speed, speed up the indoor temperature rise, and improve the heating effect;
  • the refrigerant heater is turned on, which can increase the exhaust temperature, quickly defrost and shorten the defrosting time.
  • the real-time temperature detected by the temperature sensor is Ti, and the preset standard deviation value between T and Ti is ⁇ T;
  • the heating power of the refrigerant heater is P1;
  • the heating power of the refrigerant heater is P2, where P1 is greater than P2.
  • the heat pump system includes a timing unit for calculating the heating time of the refrigerant heater
  • the heating time of the refrigerant heater is t, and the control method includes:
  • the real-time cycle determines the relationship between the temperature at the refrigerant heat exchanger and T. If the time for the temperature at the refrigerant heat exchanger to reach T is greater than t, when the heating time of the refrigerant heater is t, the refrigerant heater Stop heating.
  • the temperature at the refrigerant heat exchanger is preset to T1
  • the real-time temperature detected by the temperature sensor is Ti, and the preset standard deviation between T1 and Ti is ⁇ T1;
  • the heating power of the refrigerant heater is P3;
  • the heating power of the refrigerant heater is P4, where P3 is greater than P4.
  • the heat pump system includes a timing unit for calculating the heating time of the refrigerant heater
  • the heating time length of the refrigerant heater is preset to be t, and the control method includes:
  • the real-time cycle determines the relationship between the temperature at the refrigerant heat exchanger and T1. If the time for the temperature at the refrigerant heat exchanger to reach T1 is longer than t, the refrigerant heater stops heating.
  • the compressor startup mode is divided into high-frequency startup and low-frequency startup,
  • the compressor When the outdoor ambient temperature is less than T0, the compressor is started at a high frequency.
  • the refrigerant heater includes: a microchannel heat exchanger; a heat conduction plate, the heat conduction plate is arranged on one side of the microchannel heat exchanger; a first heat insulation plate, the first partition The heat plate is arranged on the side of the heat conducting plate away from the microchannel heat exchanger; the electromagnetic heating coil is located on the side of the first heat insulation plate away from the microchannel heat exchanger .
  • the refrigerant heater further includes: a second heat insulation plate, and the second heat insulation plate is arranged on the other side of the microchannel heat exchanger.
  • the heat pump system includes: a compressor with an exhaust port and a return port; an oil separator with an oil inlet and an oil outlet; a refrigerant heater for heating the refrigerant
  • the device has a refrigerant inlet and a refrigerant outlet, the refrigerant inlet is in communication with the exhaust port, the refrigerant outlet is in communication with the oil inlet, a four-way valve, the four-way valve has a first valve port and a second valve port , A third valve port and a fourth valve port, the first valve port is in communication with the air return port, and the second valve port is in communication with the oil outlet,
  • the first valve port When the heat pump system is in the cooling mode, the first valve port is in communication with the fourth valve port, and the second valve port is in communication with the third valve port; when the heat pump system is in the heating mode , The first valve port is in communication with the third valve port, and the second valve port is in communication with the fourth valve port; an outdoor heat exchanger, one end of the outdoor heat exchanger is connected to the third valve Mouth connected
  • An indoor heat exchanger one end of the indoor heat exchanger communicates with the other end of the outdoor heat exchanger, and the other end of the indoor heat exchanger communicates with the fourth valve port; used to detect heating of the refrigerant
  • a temperature sensor for the temperature of the device a controller, which is communicatively connected with the temperature sensor.
  • the refrigerant heater by connecting the refrigerant heater between the compressor and the oil separator, the refrigerant on the exhaust side can be heated.
  • the refrigerant heater is turned on.
  • the compressor does not need to be preheated and is directly started with high frequency, which can speed up the heat pump system startup speed, speed up the indoor temperature rise, and improve the heating effect; at the same time, during the defrosting period, the refrigerant heater is turned on, which can increase the exhaust temperature and quickly melt Frost, shorten the defrosting time.
  • the heat pump system further includes an enthalpy-increasing branch and a plate heat exchanger, the plate heat exchanger is connected between the outdoor heat exchanger and the indoor heat exchanger, the plate heat exchanger It is in communication with the outdoor heat exchanger and the indoor heat exchanger, one end of the enthalpy increasing branch is in communication with the plate heat exchanger, and the other end of the enthalpy increasing branch is in communication with the compressor.
  • Fig. 1 is a schematic diagram of a partial structure of a heat pump system according to an embodiment of the present application, in which the dashed line is an enthalpy increasing branch;
  • Figure 2 is an exploded view of the refrigerant heater of the heat pump system according to an embodiment of the present application
  • Fig. 3 is a schematic structural diagram of a refrigerant heater of a heat pump system according to an embodiment of the present application
  • Fig. 4 is a flowchart of a control method of a heat pump system according to an embodiment of the present application
  • Fig. 5 is a flowchart of a control method of a heat pump system according to an embodiment of the present application.
  • Compressor 110 exhaust port 111, return port 112,
  • Oil separator 120 oil inlet 121, oil outlet 122,
  • Refrigerant heater 130 refrigerant inlet 131, refrigerant outlet 132, micro-channel heat exchanger 133, heat conducting plate 134, first heat insulation plate 135, electromagnetic heating coil 136, second heat insulation plate 137, thermostat 138,
  • valve 140 Four-way valve 140, first valve port 141, second valve port 142, third valve port 143, fourth valve port 144,
  • Outdoor heat exchanger 151 temperature sensor 153,
  • the heat pump system 100 includes: a compressor 110, an oil separator 120, a refrigerant heater 130, a four-way valve 140, an outdoor heat exchanger 151, an indoor heat exchanger, a controller, and A temperature sensor 153 for detecting the temperature of the refrigerant heater 130.
  • the compressor 110 has an exhaust port 111 and a return port 112
  • the oil separator 120 has an oil inlet 121 and an oil outlet 122
  • the refrigerant heater 130 has a refrigerant inlet 131 and a refrigerant outlet 132.
  • the refrigerant inlet 131 communicates with the exhaust port 111
  • the refrigerant outlet 132 communicates with the oil inlet 121.
  • the refrigerant heater 130 is connected between the compressor 110 and the oil separator 120, and can heat the refrigerant on the exhaust side.
  • the ambient temperature around the compressor is relatively low under the condition of low temperature heating.
  • the compressor is in the starting state of the freezer, and the starting capacity of the freezer increases slowly.
  • the air temperature is not enough to carry the refrigerated oil out of the oil separator; in addition, in the case of low temperature heating, the defrosting speed is slow.
  • the compressor 110 When heating is started when the ambient temperature is low in winter, that is, the heat pump system 100 is in a low temperature heating start state, by adding a refrigerant heater 130 on the discharge side of the compressor 110, the refrigerant heater 130 is turned on and compressed
  • the compressor 110 does not need to be preheated, and the compressor 110 can quickly reach the heating start condition, or directly start at high frequency (for example, the start frequency of the compressor 110 can be directly adjusted from 10 Hz to 100 Hz, and this start method is called high frequency start), This can speed up the start-up speed of the heat pump system 100, speed up the indoor temperature rise, and improve the heating effect; in addition, during the defrosting period, the refrigerant heater 130 is turned on, and the heat pump system 100 can quickly heat to increase the exhaust temperature and quickly melt Frost shortens the defrosting time, and the defrosting process is not affected by the ambient temperature.
  • the four-way valve 140 has a first valve port 141, a second valve port 142, a third valve port 143, and a fourth valve port 144.
  • the first valve port 141 communicates with the return port 112, and the second valve port 142 communicates with the oil outlet 122.
  • the first valve port 141 is in communication with the fourth valve port 144, and the second valve port 142 is in communication with the third valve port 143;
  • the first valve port 141 It communicates with the third valve port 143, and the second valve port 142 communicates with the fourth valve port 144.
  • one end of the outdoor heat exchanger 151 communicates with the third valve port 143, one end of the indoor heat exchanger communicates with the other end of the outdoor heat exchanger 151, and the other end of the indoor heat exchanger communicates with the fourth valve port. 144 connected.
  • the controller communicates with the temperature sensor 153. It should be noted that the controller can control the heat pump system 100 according to the temperature information detected by the temperature sensor 153.
  • the heat pump system 100 When the heat pump system 100 operates in the heating mode, the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 110 is heated by the refrigerant heater 130, and the temperature is further increased. It enters the indoor heat exchanger through the four-way valve 140, and is forced by the fan to condense on the indoor side.
  • the condensed liquid refrigerant passes through the electronic expansion valve of the indoor unit, and after throttling through the electronic expansion valve of the outdoor unit, the pressure and temperature are reduced, and then forced convection through the outdoor heat exchanger 151 to absorb the heat in the outdoor environment into a low-temperature and low-pressure gaseous refrigerant It passes through the four-way valve 140, the low pressure tank 159 and then returns to the compressor 110 to complete the entire cycle.
  • the refrigerant heater 130 by connecting the refrigerant heater 130 between the compressor 110 and the oil separator 120, the refrigerant on the exhaust side can be heated.
  • the refrigerant heater 130 is turned on, the compressor 110 does not need to be preheated, and it is directly started at high frequency, which can speed up the startup speed of the heat pump system 100, speed up the indoor temperature rise, and improve the heating effect; at the same time, during the defrosting period, the refrigerant heater 130 is turned on , Can increase the exhaust temperature, quickly defrost and shorten the defrost time.
  • the heat pump system 100 may further include an enthalpy increasing branch 156 (shown by the dashed line in FIG. 1) and a plate heat exchanger 157.
  • the plate heat exchanger 157 is connected between the outdoor heat exchanger 151 and the indoor heat exchanger
  • the plate heat exchanger 157 is connected to the outdoor heat exchanger 151 and the indoor heat exchanger
  • one end of the enthalpy increasing branch 156 is connected to the plate heat exchanger.
  • the heat exchanger 157 is in communication
  • the other end of the enthalpy increasing branch 156 is in communication with the compressor 110.
  • the heat pump system 100 with the enthalpy increasing branch 156 can be optimized. Specifically, when the heat pump system 100 is in the low-temperature heating startup state, the refrigerant heater 130 is turned on, and the compressor 110 does not need to be preheated, and starts directly at high frequency (for example, the startup frequency of the compressor 110 can be directly adjusted from 10 Hz to 100 Hz.
  • the startup method is called high-frequency startup), which can speed up the startup speed of the heat pump system 100, speed up the indoor temperature rise, and improve the heating effect; in addition, during the defrosting period, the refrigerant heater 130 is turned on to increase the exhaust temperature and quickly Defrost, shorten the defrost time.
  • the refrigerant heater 130 may include a microchannel heat exchanger 133, a heat conducting plate 134, a first heat insulation plate 135 and an electromagnetic heating coil 136.
  • the heat conduction plate 134 may be a heat transfer steel plate
  • the heat conduction plate 134 is provided on one side of the microchannel heat exchanger 133
  • the first heat insulation plate 135 is provided on the side of the heat conduction plate 134 away from the microchannel heat exchanger 133.
  • the heating coil 136 is located on the side of the first heat insulation plate 135 away from the microchannel heat exchanger 133.
  • the refrigerant heater 130 may be placed between the compressor 110 and the oil separator 120 of the heat pump system 100, and the refrigerant flows through the refrigerant heater 130 through the microchannel heat exchanger 133.
  • the electromagnetic heating coil 136 is energized, the generated magnetic field causes the heat transfer steel plate to be quickly heated.
  • the heat transfer steel plate and the microchannel heat exchanger 133 can be bonded by thermal grease and fixed with screws. The heat of the heated steel plate is given by the refrigerant. Take it away to heat the refrigerant.
  • the refrigerant heater 130 may further include a second heat insulation plate 137, and the second heat insulation plate 137 is arranged on the other side of the microchannel heat exchanger 133.
  • the heating efficiency of the refrigerant can be improved.
  • the first heat insulation board 135 and the second heat insulation board 137 may be made of heat-insulating materials and have a plate-like structure with heat-insulating properties.
  • the refrigerant heater 130 is electromagnetic heating.
  • the electromagnetic heating components are respectively composed of electromagnetic heating coils, stainless steel plates, micro-channel heat exchangers, insulation cotton and other components.
  • the refrigerant can be heated by controlling the power of electromagnetic heating. heating.
  • the refrigerant heater 130 may further include a power source 158 and a temperature controller 138.
  • the power supply 158 can supply power to the electromagnetic heating coil 136 and the temperature controller 138.
  • the controller can control the on and off of the power supply 158 according to the temperature information detected by the temperature sensor 153, and at the same time, the controller can also control the thermostat 138 according to the temperature information, thereby controlling the heating power of the electromagnetic heating coil 136.
  • the thermostat 138 can be replaced by a fuse, or a series-connected thermostat 138 and a fuse can be used instead.
  • the heat pump system 100 may be the heat pump system 100 as described above.
  • the outdoor ambient temperature is set to T0 (for example, T0 can be 7°C-8°C), and the temperature at the refrigerant heater 130 is preset to T in the heating mode.
  • control method of the heat pump system 100 includes:
  • the refrigerant heater 130 is connected between the compressor 110 and the oil separator 120, and the compressor 110 and the refrigerant heater 130 are controlled to start according to the outdoor ambient temperature.
  • the refrigerant heater 130 is turned on, and the compressor 110 does not need to be preheated, and directly starts at high frequency, which can speed up the start of the heat pump system 100, speed up the indoor temperature rise, and improve the heating effect;
  • the refrigerant heater 130 is turned on, which can increase the exhaust gas temperature, quickly defrost, and shorten the defrosting time.
  • the real-time temperature detected by the temperature sensor 153 is Ti
  • the standard deviation between T and Ti is preset to be ⁇ T: when determining the relationship between the refrigerant heat exchanger and T , When the temperature at the refrigerant heat exchanger is less than or equal to T, and the difference between T and Ti is greater than ⁇ T, the heating power of the refrigerant heater 130 is P1; when the temperature at the refrigerant heat exchanger is less than or equal to T, and T and Ti When the difference between is less than or equal to ⁇ T, the heating power of the refrigerant heater 130 is P2, where P1 is greater than P2.
  • the temperature of the refrigerant can be accurately controlled according to the temperature of the refrigerant heat exchanger, especially in the heating mode, after the heat pump system 100 is started, the indoor temperature rise speed can be accelerated, and the heating effect can be improved.
  • the heat pump system 100 includes a timing unit for calculating the heating duration of the refrigerant heater 130.
  • the heating duration of the refrigerant heater 130 is preset to t, and the control method includes:
  • the real-time cycle determines the relationship between the temperature at the refrigerant heat exchanger and T. If the time for the temperature at the refrigerant heat exchanger to reach T is greater than t, the refrigerant heater 130 stops heating. In this way, it is possible to control whether the refrigerant heater 130 starts heating or whether to stop heating.
  • the preset temperature at the refrigerant heat exchanger is T1.
  • the refrigerant heater 130 is activated: it is determined that the refrigerant exchange The relationship between the temperature at the heat exchanger and T1: if the temperature at the refrigerant heat exchanger is less than or equal to T1, the refrigerant heater 130 stops heating; if the temperature at the refrigerant heat exchanger is greater than T1, the refrigerant heater 130 continues to heat.
  • the real-time temperature detected by the temperature sensor 153 is Ti
  • the preset standard deviation between T1 and Ti is ⁇ T1.
  • the standard deviation value ⁇ T1 is a preset value, which is a value preset by the heat pump system 100, and the standard deviation value ⁇ T1 can be used as reference data for the difference between the preset temperature T1 and the real-time temperature Ti.
  • the heating power of the refrigerant heater 130 is P3;
  • the heating power of the refrigerant heater 130 is P4, where P3 is greater than P4.
  • the heat pump system 100 includes a timing unit for calculating the heating time of the refrigerant heater 130, the heating time of the refrigerant heater 130 is t
  • the control method includes: when the heat pump system 100 is in the defrosting mode, real-time cycle determination The relationship between the temperature at the refrigerant heat exchanger and T1. If the time for the temperature at the refrigerant heat exchanger to reach T1 is longer than t, when the heating time of the refrigerant heater 130 is t, the refrigerant heater 130 stops heating. In other words, the heating time length of the refrigerant heater 130 can be controlled by the timing unit.
  • the timing unit performs timing at the same time. If the difference between T and Ti is less than or equal to ⁇ T1 within the preset time period, the heating power of the refrigerant heater 130 is adjusted; The preset time has arrived, and the difference between T and Ti is greater than ⁇ T1, and the heating power of the refrigerant heater 130 is adjusted.
  • the compressor 110 start mode is divided into high frequency start and low frequency start.
  • the low frequency starts the compressor 110; when the outdoor ambient temperature is less than T0, the high frequency starts the compressor 110.
  • the starting mode of the compressor 110 can be controlled according to the outdoor ambient temperature, so that the heat pump system 100 can be in the heating mode to rapidly increase the indoor temperature.
  • the "high frequency start” and “low frequency start” here are relative start frequencies.
  • the compressor 110 has a first start frequency and a second start frequency, and the first start frequency is greater than the second start frequency, then the compressor When the compressor 110 is started at the first starting frequency, the compressor 110 is started at a high frequency; when the compressor 110 is started at the second starting frequency, the compressor 110 is started at a low frequency.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

L'invention concerne un système de pompe à chaleur (100) et son procédé de commande. Le système de pompe à chaleur (100) comprend un compresseur (110), un séparateur d'huile (120), un dispositif de chauffage à milieu froid (130), un dispositif de commande, et un capteur de température (153) utilisé pour mesurer la température du dispositif de chauffage à milieu froid (130). Le dispositif de chauffage à milieu froid est relié entre le compresseur (110) et le séparateur d'huile (1320). La température ambiante extérieure est définie comme T0, et dans un mode de chauffage, la température au niveau du dispositif de chauffage à milieu froid (130) est prédéfinie comme T. Le procédé de commande pour le système de pompe à chaleur (100) comprend les étapes consistant à : lorsque le système de pompe à chaleur (100) est dans un mode de chauffage, si la température ambiante extérieure est inférieure ou égale à T0, démarrer le compresseur (110), et démarrer le dispositif de chauffage à milieu froid (130) ; et si la température au niveau d'un échangeur de chaleur à milieu froid est inférieure ou égale à T, alors le dispositif de chauffage à milieu froid (130) continue à chauffer.
PCT/CN2020/078069 2019-11-13 2020-03-05 Système de pompe à chaleur et son procédé de commande WO2021093228A1 (fr)

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CN201911108239.XA CN110836551A (zh) 2019-11-13 2019-11-13 热泵系统及热泵系统的控制方法
CN201911108239.X 2019-11-13

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CN110836551A (zh) * 2019-11-13 2020-02-25 广东美的暖通设备有限公司 热泵系统及热泵系统的控制方法
CN114322243B (zh) * 2020-10-10 2024-02-20 广东美的精密模具科技有限公司 空调器及其控制方法和计算机可读存储介质
CN113531820B (zh) * 2021-06-22 2023-03-17 青岛海尔空调器有限总公司 用于空调器压缩机预热的方法、空调器、空调系统

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