EP3680578B1 - Système de pompe à chaleur et climatiseur - Google Patents

Système de pompe à chaleur et climatiseur Download PDF

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Publication number
EP3680578B1
EP3680578B1 EP19801655.2A EP19801655A EP3680578B1 EP 3680578 B1 EP3680578 B1 EP 3680578B1 EP 19801655 A EP19801655 A EP 19801655A EP 3680578 B1 EP3680578 B1 EP 3680578B1
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EP
European Patent Office
Prior art keywords
valve
valve port
heat exchanger
heating
heat
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.)
Active
Application number
EP19801655.2A
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German (de)
English (en)
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EP3680578A1 (fr
EP3680578A4 (fr
Inventor
Bin Luo
Kun Yang
Lei Zhan
Shuqing Liu
Zhijun TAN
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.)
GD Midea Heating and Ventilating Equipment Co Ltd
Hefei Midea Heating and Ventilating Equipment Co Ltd
Original Assignee
GD Midea Heating and Ventilating Equipment Co Ltd
Hefei Midea Heating and Ventilating Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by GD Midea Heating and Ventilating Equipment Co Ltd, Hefei Midea Heating and Ventilating Equipment Co Ltd filed Critical GD Midea Heating and Ventilating Equipment Co Ltd
Publication of EP3680578A1 publication Critical patent/EP3680578A1/fr
Publication of EP3680578A4 publication Critical patent/EP3680578A4/fr
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Publication of EP3680578B1 publication Critical patent/EP3680578B1/fr
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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
    • 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
    • F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F25B47/022—Defrosting cycles hot gas defrosting
    • F25B47/025—Defrosting cycles hot gas defrosting by reversing the 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
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02742—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using two four-way valves
    • 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
    • F25B2347/00—Details for preventing or removing deposits or corrosion
    • F25B2347/02—Details of defrosting cycles
    • F25B2347/023—Set point defrosting
    • 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—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/19—Pumping down refrigerant from one part of the cycle to another part of the cycle, e.g. when the cycle is changed from cooling to heating, or before a defrost cycle is started
    • 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
    • F25B2500/26—Problems to be solved characterised by the startup of the refrigeration cycle

Definitions

  • the present invention relates to a technical field of air conditioners, and particularly to a heat pump system and an air conditioner having the same.
  • the refrigerant absorbs heat from the outdoor side through the outdoor heat exchanger, then increases its pressure and temperature through the compressor, and discharges the heat from the outdoor side into the room to achieve a heating effect.
  • the outdoor temperature is low, the refrigerant in the outdoor heat exchanger needs to have a temperature lower than the temperature of the outdoor air so as to absorb the heat of the outdoor air, such that the outdoor heat exchanger will frost in the heating mode, and the defrosting is required after frosting, so as to ensure that the system can run safely and efficiently.
  • the existing heat pump system needs to absorb heat from the indoor side during the defrosting process, such that the indoor temperature decreases, and the indoor unit cannot heat normally. Further, when the outdoor unit resumes the heating mode, it takes a while to switch and start the compressor to heat the refrigerant system gradually, thus reducing the operating energy efficiency.
  • the existing heat pump system needs to operate at low frequency for a long time, so as to vaporize the liquid refrigerant in the compressor, reduce the refrigerant content in the refrigeration oil returned by the oil separator, and hence increase the content of the refrigeration oil in the compressor to the safe concentration. After the content of the refrigeration oil reaches the safe concentration, the heat pump system can operate normally. This process lasts for a long time. Thus, the indoor unit still has not blown out hot air even ten minutes after the start-up, and hence the start-up speed is slow.
  • the air conditioning system comprises a compressor, a reversing assembly, an outdoor heat exchanger, an indoor heat exchanger, a heat storage tank, a heat pipe, a first valve body, a second valve body, a first branch, a second branch, a third valve body and a fourth valve body, wherein the heat storage tank is used for storing headheat; one end of the heat pipe is arranged on a position close to the compressor, and the other end of the heat pipe extends into the heat storage tank; the first valve body is arranged between the outdoor heat exchanger and a second valve port and the second valve body; the second valve body is arranged between the indoor heat exchanger and the third valve body a third valve port; the first branch is connected in parallel with the first valve body, and a part of the first branch is located in the heat storage tank; the second branch is connected in parallel with the second valve body, and a part of the second branch is located in
  • the main objective of the present disclosure is to provide a heat pump system, which is intended to achieve a defrosting without stopping an indoor unit, so as to improve the operating energy efficiency and the indoor heating comfort, while ensuring the normal heating of the indoor unit.
  • heat is supplied to the low-temperature gas-liquid mixed refrigerant discharged from the compressor, and the liquid refrigerant contained in the refrigeration oil discharged from the compressor is evaporated as soon as possible, so as to rapidly reduce the refrigerant content in the refrigeration oil returned by the oil separator, so that the concentration of the refrigeration oil in the compressor is quickly increased to a safe level, thus reducing the time from the start-up to the high frequency operation of the compressor and increasing the start-up speed of the system.
  • the present invention provides a heat pump system as defined in independent claim 1.
  • the switching device includes a first four-way valve and a second four-way valve connected in series, the first four-way valve includes first to fourth valve ports, the second four-way valve includes fifth to eighth valve ports, the compressor assembly is communicated with the first valve port, the outdoor heat exchanger is communicated with the eighth valve port, the heating and heat accumulation device has a first end communicated with the fourth valve port and a second end communicated with the fifth valve port, the indoor heat exchanger is communicated with the second valve port and the sixth valve port, the third valve port and the seventh valve port are both communicated with a suction end of the compressor assembly.
  • the first valve port of the first four-way valve is communicated with the fourth valve port of the first four-way valve
  • the fifth valve port of the second four-way valve is communicated with the sixth valve port, the seventh valve port and the eighth valve port of the second four-way valve, respectively.
  • the first valve port of the first four-way valve is communicated with the second valve port of the first four-way valve
  • the seventh valve port of the second four-way valve is communicated with the eighth valve port of the second four-way valve.
  • the first valve port of the first four-way valve is communicated with the second valve port, the third valve port and the fourth valve port of the first four-way valve, respectively, and the fifth valve port of the second four-way valve is communicated with the eighth valve port of the second four-way valve.
  • the switching device also includes a first solenoid valve, and the first solenoid valve is arranged between the sixth valve port and the indoor heat exchanger.
  • the heat pump system also includes a first check valve, and the first check valve is connected between the outdoor heat exchanger and the heating and heat accumulation device.
  • the heat pump system also includes a throttling device, and the throttling device has a first end communicated with the heating and heat accumulation device and a second end communicated with the fifth valve port and the first check valve.
  • the heat pump system also includes a second check valve, and the second check valve is connected between the second valve port and the indoor heat exchanger.
  • the heat pump system also has a refrigeration mode under the switch of the switching device, and in the refrigeration mode, the first valve port of the first four-way valve is communicated with the fourth valve port of the first four-way valve, the fifth valve port of the second four-way valve is communicated with the eighth valve port, the sixth valve port and the seventh valve port of the second four-way valve, respectively.
  • the heating and heat accumulation device includes a second solenoid valve and a heat exchanger, and the heat exchanger is connected in series with the second solenoid valve and communicated with the switching device.
  • the heating and heat accumulation device further includes a heating assembly and/or a heat accumulation assembly arranged to an outer wall of the heat exchanger.
  • the heating assembly is configured as an exogenous heater; and/or the heat accumulation assembly is configured as a heat accumulator.
  • the present disclosure also provides an air conditioner, which includes a heat pump system.
  • the heat pump system includes a compressor assembly, an outdoor heat exchanger and an indoor heat exchanger.
  • the heat pump system further includes a heating and heat accumulation device and a switching device.
  • the compressor assembly, the switching device, the outdoor heat exchanger and the indoor heat exchanger are connected in sequence to form a refrigerating circuit.
  • the heating and heat accumulation device is connected in series with the switching device.
  • the heat pump system has a first heating mode, a second heating mode and a defrosting mode under the switch of the switching device.
  • a refrigerant discharged out of the compressor assembly enters the indoor heat exchanger and the outdoor heat exchanger in sequence after passing through the switching device and the heating and heat accumulation device, and flows back to the compressor assembly.
  • the refrigerant discharged out of the compressor assembly enters the indoor heat exchanger and the outdoor heat exchanger in sequence after passing through the switching device, and flows back to the compressor assembly.
  • the refrigerant discharged out of the compressor assembly enters the indoor heat exchanger and the outdoor heat exchanger in sequence after passing through the switching device, and the refrigerant flowing out of the outdoor heat exchanger flows back to the compressor assembly after passing through the heating and heat accumulation device.
  • the heat pump system in the technical solution of the present invention in the first heating mode, the refrigerant discharged out of the compressor assembly enters the indoor heat exchanger and the outdoor heat exchanger in sequence after passing through the switching device and the heating and heat accumulation device, and flows back to the compressor assembly.
  • the heat pump system can be switched between the first heating mode and the second heating mode.
  • the refrigerant discharged out of the compressor assembly enters the indoor heat exchanger and the outdoor heat exchanger in sequence after passing through the switching device, and flows back to the compressor assemble. In this process, the normal heating of the heat pump system is ensured.
  • the refrigerant with a high temperature and a high pressure discharged out of the compressor assembly is partially condensed in the indoor heat exchanger, and then flows to the outdoor heat exchanger to defrost the outdoor heat exchanger.
  • the refrigerant flowing out of the outdoor heat exchanger absorbs heat and evaporates through the heating and heat accumulation device, and flows back to the compressor assembly, thus achieving the defrosting without stopping the heating.
  • the indoor temperature keeps not to be reduced, thus improving the operating energy efficiency and the heating comfort of the heat pump system.
  • the heat pump system provided by the present disclosure uses the switching device to switch the different modes of the refrigerant discharged out of the compressor assembly.
  • the heating and heat accumulation device is used to allow the heat pump system to realize the defrosting without stopping the heating while heating, thus improving the operating energy efficiency and the heating comfort of the heat pump system.
  • first and second are used herein for purposes of description and are not intended to indicate or imply relative importance or significance or to imply the number of indicated technical features.
  • the feature defined with “first” and “second” may indicate or imply to comprise one or more of this feature.
  • the technical solutions of the various embodiments may be combined with one another, but must be based on that those skilled in the art can achieve the combination. When the combination of the technical solutions is contradictory or impossible to implement, it should be considered that the combination of the technical solutions does not exist, and is not covered by the protection scope of the present disclosure.
  • the present invention provides a heat pump system 100.
  • the heat pump system 100 includes a compressor assembly 10, an outdoor heat exchanger 20, an indoor heat exchanger 30, a heating and heat accumulation device 50 and a switching device 40.
  • the compressor assembly 10, the switching device 40, the outdoor heat exchanger 20 and the indoor heat exchanger 30 are connected in sequence to form a refrigerating circuit.
  • the heating and heat accumulation device 50 and the switching device 40 are arranged in series.
  • the heat pump system 100 has a first heating mode, a second heating mode and a defrosting mode under switching of the switching device 40.
  • the first heating mode the refrigerant discharged from the compressor assembly 10 enters the indoor heat exchanger 30 and the outdoor heat exchanger 20 in sequence via passing through the witching device 40 and the heating and heat accumulation device 50, and flows back to the compressor assembly 10.
  • the second heating mode the refrigerant discharged from the compressor assembly 10 enters the indoor heat exchanger 30 and the outdoor heat exchanger 20 in sequence via passing through the switching device 40, and flows back to the compressor assembly.
  • the refrigerant discharged from the compressor assembly 10 enters the indoor heat exchanger 30 and the outdoor heat exchanger 20 in sequence via passing through the switching device 40, and the refrigerant flowing out of the outdoor heat exchanger 20 flows back to the compressor assembly 10 via passing through the heating and heat accumulation device 50.
  • the compressor assembly 10 includes a compressor 11 and a liquid separator 12 connected in series, the compressor assembly 10 has an exhaust port 111 and a liquid returning port 112, the exhaust port 111 is provided to the compressor 11, the liquid returning port 112 is provided to the liquid separator 12, and the exhaust port 111 of the compressor 11 is connected with the switching device 40 for discharging a superheated steam with a high temperature and a high pressure.
  • the heat pump system 100 includes the first heating mode, the second heating mode and the defrosting mode under the switching of the switching device 40. It can be understood that, when the heat pump system 100 is in the first heating mode, the refrigerant is discharged out of the exhaust port 111 of the compressor 11, passes through the switching device 40 and the heating and heat accumulation device 50, enters the indoor heat exchanger 30 and the outdoor heat exchanger 20 in sequence, flows back to the liquid separator 12 through the liquid returning port 112, and flows into the compressor 11 again.
  • the refrigerant is further heated by the heating and heat accumulation device 50, such that the refrigerant still has a high temperature after releasing heat in the indoor heat exchanger 30, and allows the outdoor heat exchanger 20 not to be frosted when absorbing heat in the outdoor heat exchanger 20, thus improving an operating energy efficiency of the whole heat pump system 100, and increasing a start-up speed.
  • the heat pump system 100 After being normally started up to operate, the heat pump system 100 is switched by the switching device 40 to the second heating mode, and the second heating mode is a normal heating mode.
  • the heat pump system 100 When the heat pump system 100 is in the second heating mode, the refrigerant is discharged out of the exhaust port 111 of the compressor 11, enters the indoor heat exchanger 30 and the outdoor heat exchanger 20 in sequence via passing through the switching device 40, flows back to the liquid separator 12 through the liquid returning port 112, and flows into the compressor 11 again.
  • the refrigerant with the high temperature and the high pressure discharged out of the exhaust port 111 of the compressor 11 releases heat in the indoor heat exchanger 30, so as to increase a temperature of an indoor environment, and absorbs heat in the outdoor heat exchanger 20, so as to realize a normal pure heating mode.
  • the heat pump system 100 may also be switched between the first heating mode and the second heating mode.
  • the refrigerant When the heat pump system 100 defrosts in the defrosting mode, the refrigerant is discharged out of the exhaust port 111 of the compressor 11, further partially condensed in the indoor heat exchanger 30, and then flows to the outdoor heat exchanger 20 to defrost the outdoor heat exchanger 20.
  • the refrigerant flowing out of the outdoor heat exchanger 20 absorbs heat and evaporates through heating and heat accumulation device 40, further flows back to the liquid separator 12 through the liquid returning port 112, and flows into the compressor 11 again, so as to realize the defrosting without stopping the heating.
  • the indoor temperature keeps not to be decreased, so as to improve the operating energy efficiency and the heating comfort of the heat pump system 100.
  • the switching device 40 is used to switch different modes of the refrigerant discharged from the compressor assembly 10, and the heating and heat accumulation device 40 allows the heat pump system 100 to defrost without stopping the heating while heating, thus improving the operating energy efficiency and the heating comfort of the system.
  • the switching device 40 includes a first four-way valve 41 and a second four-way valve 42 connected in series.
  • the first four-way valve 41 has a first valve port A1, a second valve port B1, a third valve port C1 and a fourth valve port D1.
  • the second four-way valve 42 has a fifth valve port A2, a sixth valve port B2, a seventh valve port C2 and an eighth valve port D2.
  • the compressor assembly 10 is communicated with the first valve port A1, the outdoor heat exchanger 20 is communicated with the eighth valve port D2, the heating and heat accumulation device 50 has a first end communicated with the fourth valve port D1 and a second end communicated with the fifth valve port A2, the indoor heat exchanger 30 is communicated with the second valve port B1 and the sixth valve port B2, and the third valve port C1 and the seventh valve port C2 are both communicated with a suction end of the compressor assembly 10.
  • the heat pump system 100 of the present disclosure can achieve the switch of different modes by switching the valve ports of the first four-way valve 41 and the second four-way valve 42, and also the heating and heat accumulation device 50 is used to cooperate with the different modes, such that the heat pump system 100 can achieve the quick start-up, the normal heating, the defrosting without stopping the heating, and other functions, thus improving the operating energy efficiency and the heating comfort of the system.
  • the first valve port A1 of the first four-way valve 41 is communicated with the fourth valve port D1 of the first four-way valve 41
  • the fifth valve port A2 of the second four-way valve 42 is communicated with the sixth valve port B2, the seventh valve port C2 and the eighth valve port D2 of the second four-way valve 42, respectively.
  • the refrigerant discharged out of the exhaust port 111 of the compressor 11 passes through the first valve port A1 and the fourth valve port D1 of the first four-way valve 41, then is further heated by the heating and heat accumulation device 50, and enters the indoor heat exchanger 30 to release heat after passing through the fifth valve port A2 and the sixth valve port B2 of the second four-way valve 42.
  • the refrigerant still has a high temperature, and absorbs heat in the outdoor heat exchanger 20. Then, the refrigerant flows out of the eighth valve port D2 and the seventh valve port C2 of the second four-way valve 42, further flows back to the liquid separator 12 through the liquid returning port 112, and flows into the compressor 11 again. Since the refrigerant of the high temperature absorbs heat in the outdoor heat exchanger 20, the outdoor heat exchanger 20 will not be frosted, thus improving the operating energy efficiency of the whole heat pump system 100, and increasing the start-up speed.
  • the first valve port A1 of the first four-way valve 41 is communicated with the second valve port B1 of the first four-way valve 41, and the seventh valve port C2 of the second four-way valve 42 is communicated with the eighth valve port D2 of the second four-way valve 42.
  • the refrigerant discharged out of the exhaust port 111 of the compressor 11 passes through the first valve port A1 and the second valve port B1 of the first four-way valve 41, enters the indoor heat exchanger 30 to release heat, so as to increase a temperature in an indoor environment, further absorbs heat in the outdoor heat exchanger 20, then flows out of the eighth valve port D2 and the seventh valve port C2 of the second four-way valve 42, back to the liquid separator 12 through the liquid returning port 112, and further into the compressor 11 again, thus realizing the normal pure heating mode.
  • the first valve port A1 of the first four-way valve 41 is communicated with the second valve port B1
  • the fifth valve port A2 of the second four-way valve 42 is communicated with the eighth valve port D2 of the second four-way valve 42.
  • the refrigerant discharged out of the exhaust port 111 of the compressor 11 passes through the first valve port A1 and the second valve port B1 of the first four-way valve 41, enters the indoor heat exchanger 30 to release heat, so as to increase the temperature in the indoor environment, further absorbs heat in the outdoor heat exchanger 20, then flows out of the eighth valve port D2 and the fifth valve port A2 of the second four-way valve 42, further absorbs heat and evaporates through the heating and heat accumulation device 40, and flows back to the liquid separator 12 through the liquid returning port 112, and further into the compressor 11 again.
  • the heat pump system 100 achieves the defrosting without stopping the heating, such that the indoor temperature keeps not to be decreased during the defrosting, thus improving the operating energy efficiency and the heating comfort of the heat pump system 100.
  • the heat pump system 100 also has a refrigeration mode under the switch of the switching device 40, i.e. a normal refrigeration mode of the heat pump system 100.
  • a refrigeration mode under the switch of the switching device 40, i.e. a normal refrigeration mode of the heat pump system 100.
  • the first valve port A1 of the first four-way valve 41 is communicated with the fourth valve port D1 of the first four-way valve 41
  • the fifth valve port A2 of the second four-way valve 42 is communicated with the eighth valve port D2, the sixth valve port B2 and the seventh valve port C2 of the second four-way valve 42, respectively.
  • the refrigerant discharged out of the exhaust port 111 of the compressor 11 passes through the first valve port A1 and the fourth valve port D1 of the first four-way valve 41, and further through the heating and heat accumulation device 40.
  • the heating and heat accumulation device 40 absorbs and stores a part of heat of the refrigerant with the high temperature and the high pressure.
  • the refrigerant further flows into the outdoor heat exchanger 20 to release heat through the fifth valve port A2 and the eighth valve port D2 of the second four-way valve 42, also absorbs heat in the indoor heat exchanger 30, so as to reduce the temperature in the indoor environment, and flows out of the sixth valve port B2 and the seventh valve port C2 of the second four-way valve 42, back to the liquid separator 12 through the liquid returning port 112, and into the compressor 11 again.
  • the switching device 40 further includes a first solenoid valve 43, and the first solenoid valve 43 is arranged between the sixth valve port B2 and the indoor heat exchanger 30. It can be understood that, by providing the first solenoid valve 43, it is convenient for the first solenoid valve 43 to cooperate with the second four-way valve 42 when the switching device 40 switches the different modes, thus realizing the direct switch of the different modes smoothly.
  • the heat pump system 100 further includes a throttling device 70 and a first check valve 60, the first check valve 60 is connected between the outdoor heat exchanger 20 and the heating and heat accumulation device 50, the throttling device 70 has a first end communicated with the heating and heat accumulation device 50, and a second end communicated with the fifth valve port A2 and the first check valve 60.
  • the throttling device 70 is an electronic expansion valve or an capillary tube.
  • the heat pump system 100 further includes a second check valve 80, and the second check valve 80 is connected between the second valve port B1 and the indoor heat exchanger 30.
  • the throttling device 70 and the first solenoid valve 43 are open, the first check valve 60 and the second check valve 80 are closed, the first valve port A1 and the fourth valve port D1 of the first four-way valve 41 communicates the exhaust port 111 of the compressor 11 with the heating and heat accumulation device 50, the fifth valve port A2 and the sixth valve port B2 of the second four-way valve 42 communicates the heating and heat accumulation device 50 with the first solenoid valve 43 and the indoor heat exchanger 30.
  • the gaseous refrigerant with the high pressure discharged out of the exhaust port 111 of the compressor 11 is heated in the heating and heat accumulation device 50 (or is condensed to release a part of heat to the heating and heat accumulation device 50), and then is carried to the indoor heat exchanger 30 to release heat through the first solenoid valve 43.
  • the liquid refrigerant flowing out of the indoor heat exchanger 30 absorbs heat and evaporates into the gaseous refrigerant in the outdoor heat exchanger 20, and flows out of the eighth valve port D2 and the seventh valve port C2 of the second four-way valve 42, back to the liquid separator 12 through the liquid returning port 112, and further into the compressor 11 again.
  • the throttling device 70, the first solenoid valve 43 and the first check valve 60 are closed, the second check valve 80 is open, and the first valve port A1 and the second valve port B1 of the first four-way valve 41 communicate the exhaust port 111 of the compressor 11 with the second check valve 80 and the indoor heat exchanger 30.
  • the gaseous refrigerant with the high pressure discharged out of the exhaust port 111 of the compressor 11 flows to the indoor heat exchanger 30 to release heat through the first four-way valve 41 and the second check valve 80, so as to increase the temperature in the indoor environment.
  • the liquid refrigerant with the high pressure absorbs heat and evaporates into the gaseous refrigerant in the outdoor heat exchanger 20, and flows out of the eighth valve port D2 and the seventh valve port C2 of the second four-way valve 42, back to the liquid separator 12 through the liquid returning port 112, and into the compressor 11 again, thus achieving the normal pure heating mode.
  • the throttling device 70, the first check valve 60 and the second check valve 80 are open, the first solenoid valve 43 is closed, and the first valve port A1 and the second valve port B1 of the first four-way valve 41 communicate the exhaust port 111 of the compressor 11 with the second check valve 80 and the indoor heat exchanger 30.
  • the gaseous refrigerant with the high pressure discharged out of the exhaust port 111 of the compressor 11 flows to the indoor heat exchanger 30 to release heat through the first four-way valve 41 and the second check valve 80, so as to increase the temperature in the indoor environment.
  • the refrigerant continues to be condensed to release heat in the outdoor heat exchanger 20, so as to allow the frost formed on the outdoor heat exchanger 20 to thaw.
  • the generated liquid refrigerant passes through the first check valve 60 and the throttling device 70, absorbs heat and evaporates while passing through the heating and heat accumulation device 40, and flows back to the liquid separator 12 through the liquid returning port 112 after passing through the fourth valve port D1 and the third valve port C1 of the first four-way valve 41, and further into the compressor 11 again, such that the heat pump system 100 achieves the defrosting without stopping the heating.
  • the indoor temperature keeps not to be decreased, thus improving the operating energy efficiency and the heating comfort of the heat pump system 100.
  • the refrigerant flows from the outdoor heat exchanger 20 to the heating and heat accumulation device 40 via two flow paths.
  • the refrigerant flows from the outdoor heat exchanger 20 to the heating and heat accumulation device 40 via the first check valve 60 and the throttling device 70.
  • the refrigerant flows from the outdoor heat exchanger 20 to the heating and heat accumulation device 40 via the eighth valve port D2 and the fifth valve port A2 of the second four-way valve 42, and the throttling device 70.
  • the refrigerant due to influences on the two flow paths by the pressure, the refrigerant generally flows to the heating and heat accumulation device 40 in the first path, while the second four-way valve 42 is out of action temporarily.
  • the throttling device 70 and the first check valve 60 are open, the first check valve 60 and the second check valve 80 are closed, the first valve port A1 and the fourth valve port D1 of the first four-way valve 41 communicate the exhaust port 111 of the compressor 11 with the heating and heat accumulation device 50, the fifth valve port A2 and the eighth valve port D2 of the second four-way valve 42 communicate the heating and heat accumulation device 50 with the outdoor heat exchanger 20, and the sixth valve port B2 and the seventh valve port C2 of the second four-way valve 42 communicate the indoor heat exchanger 30 with the liquid returning port 112 of the liquid separator 12.
  • the gaseous refrigerant with the high pressure discharged out of the exhaust port 111 of the compressor 11 passes through the first four-way valve 41, the throttling device 70 and the second four-way valve 42, then flows into the outdoor heat exchanger 20 to be condensed into the liquid refrigerant with the high pressure, further flows into the indoor heat exchanger 30 to be throttled and evaporated into the gaseous refrigerant with the low pressure, and flows out of the sixth valve port B2 and the seventh valve port C2 of the second four-way valve 42, back to the liquid separator 12 through the liquid returning port 112, and into the compressor 11 again, thus reducing the temperature in the indoor environment.
  • the heating and heat accumulation device 50 includes a second solenoid valve, a heat exchanger 52 and a heating assembly 51, the heating assembly 51 is arranged to an outer wall of the heat exchanger 52, and the heat exchanger 52 is connected in series with the second solenoid valve and communicated with the switching device 40.
  • the second solenoid valve is configured to control operations states of the heat exchanger and the heating assembly 51.
  • the heating assembly 51 may be an exogenous heater, and the exogenous heater may be an electric heating member or a gas heating member.
  • the heating assembly 51 is preferably configured as the electric heating member, and the electric heating member is attached to the outer wall of the heat exchanger 52.
  • the electric heating member is controlled by the second solenoid valve, so as to heat the outer wall of the heat exchanger 52, such that the refrigerant can achieve a heat exchange by the heat exchanger 52 when passing through the heat exchanger 52.
  • the heating and heat accumulation device 50 includes a second solenoid valve, a heat exchanger 52 and a heat accumulation assembly (not illustrated), the heat accumulation assembly may be arranged to an outer wall of the heat exchanger 52, and the heat exchanger 52 is connected in series with the second solenoid valve and communicated with the switching device 40.
  • the second solenoid valve is configured to control an operation state of the heat exchanger
  • the heat accumulation assembly may be a heat accumulator.
  • the heat accumulator may use heat accumulation materials for heat exchange.
  • the accumulation materials may be phase-change materials or sensible heat and heat accumulation materials, which is not limited herein.
  • the heat accumulation assembly preferably uses a heat accumulation sheet made of the heat accumulation materials, and the heat accumulation sheet is arranged to the outer wall of the heat exchanger 52.
  • the heat accumulation sheet accumulates heat by the heat exchanger 52.
  • the heat accumulated in the heat accumulation sheet is used to evaporate the liquid refrigerant with the low temperature when the liquid refrigerant with the low temperature returns to the compressor, so as to reduce the refrigerant content in the refrigeration oil returned from the liquid separator 12, and hence to increase the refrigeration oil content in the compressor to a safe concentration, thereby achieving a normal operation.
  • the time from the start-up to the high-frequency operation of the compressor is reduced, and the start-up speed of the system is increased.
  • the heating and heat accumulation device 50 includes a second solenoid valve, a heat exchanger 52, a heating assembly 51 and a heat accumulation assembly (not illustrated), the heating assembly 51 and the heat accumulation assembly are arranged to an outer wall of the heat exchanger 52 and spaced apart from each other, and the heat exchanger 52 is connected in series with the second solenoid valve and communicated with the switching device 40.
  • the second solenoid valve is configured to control operation states of the heat exchanger and the heating assembly 51.
  • the heating assembly 51 may be an exogenous heater, and the exogenous heater may be an electric heating member or a gas heating member.
  • the heat accumulation assembly may be a heat accumulator.
  • the heat accumulator may use heat accumulation materials for heat exchange.
  • the accumulation materials may be phase-change materials or sensible heat and heat accumulation materials, which is not limited herein.
  • the heating assembly 51 is preferably configured as the electric heating member, and the electric heating member is attached to the outer wall of the heat exchanger 52.
  • the electric heating member is controlled by the second solenoid valve, so as to heat the outer wall of the heat exchanger 52, such that the refrigerant can achieve a heat exchange by the heat exchanger 52 when passing through the heat exchanger 52.
  • the heat accumulation assembly preferably uses a heat accumulation sheet made of the heat accumulation materials, and the heat accumulation sheet is arranged to the outer wall of the heat exchanger 52.
  • the heat accumulation sheet also accumulates heat by the heat exchanger 52.
  • the heat accumulation sheet also accumulates heat by the heat exchanger 52.
  • the heat accumulated in the heat accumulation sheet is used to evaporate the liquid refrigerant with the low temperature when the liquid refrigerant with the low temperature returns to the compressor, so as to reduce the refrigerant content in the refrigeration oil returned from the liquid separator 12, and hence to increase the refrigeration oil content in the compressor to a safe concentration, thereby achieving a normal operation.
  • the time from the start-up to the high-frequency operation of the compressor is reduced, and the start-up speed of the system is increased.
  • the present invention also provides an air conditioner, and the air conditioner includes a heat pump system 100.
  • the air conditioner includes a heat pump system 100.
  • Specific structures of the heat pump system can refer to the above embodiments. Since a control method not according to the invention for the heat pump system uses all the technical solutions of all the above embodiments, the control method for the heat pump system at least has all the significant effects resulted from the technical solutions of the above embodiments, which thus will not be repeated herein.
  • the air conditioner of the present invention includes the heat pump system 100.
  • the heat pump system 100 uses the switching device 40 to switch the different modes of the refrigerant discharged from the compressor assembly 10, and also uses the heating and heat accumulation device 50 to cooperate with the switching device 40, such that the heat pump system 100 can achieve the defrosting without stopping the heating while heating, thus improving the operating energy efficiency and the heating comfort of the air conditioner.

Claims (7)

  1. Système de pompe à chaleur (100) comprenant un ensemble de compresseur (10), un échangeur de chaleur externe (20) et un échangeur de chaleur interne (30), dans lequel le système de pompe à chaleur comprend en outre un dispositif de chauffage et d'accumulation de chaleur (50) ainsi qu'un dispositif de commutation (40), l'ensemble de compresseur (10), le dispositif de commutation (40), l'échangeur de chaleur externe (20) et l'échangeur de chaleur interne (30) sont raccordés en séquence pour former un circuit réfrigérant, et le dispositif de chauffage et d'accumulation de chaleur (50) est raccordé en série au dispositif de commutation (40),
    dans lequel le système de pompe à chaleur présente un premier mode de chauffage, un deuxième mode de chauffage et un mode de dégivrage commutés par le dispositif de commutation ;
    dans lequel le système de pompe à chaleur est configuré de telle façon que pendant le fonctionnement dans le premier mode de chauffage, un réfrigérant déchargé hors de l'ensemble de compresseur (10) entre dans l'échangeur de chaleur interne (30) et l'échangeur de chaleur externe (20) en séquence après avoir traversé le dispositif de commutation (40) et le dispositif de chauffage et d'accumulation de chaleur (50), et revient vers l'ensemble de compresseur (10) ; dans le deuxième mode de chauffage, le réfrigérant déchargé hors de l'ensemble de compresseur (10) entre dans l'échangeur de chaleur interne (30) et l'échangeur de chaleur externe (20) en séquence après avoir traversé le dispositif de commutation (40), et revient vers l'ensemble de compresseur (10) ; dans le mode de dégivrage, le réfrigérant déchargé hors de l'ensemble de compresseur (10) entre dans l'échangeur de chaleur interne (30) et l'échangeur de chaleur externe (20) en séquence après avoir traversé le dispositif de commutation (40), et le réfrigérant s'écoulant hors de l'échangeur de chaleur externe (20) revient vers l'ensemble de compresseur (10) après avoir traversé le dispositif de chauffage et d'accumulation de chaleur (50),
    caractérisé en ce que le dispositif de commutation (40) comprend une première soupape à quatre voies (41) et une deuxième soupape à quatre voies (42) raccordées en série, la première soupape à quatre voies (41) comprend des premier à quatrième orifices de soupape (A1, B1, C1, D1), la deuxième soupape à quatre voies (42) comprend des cinquième à huitième orifices de soupape (A2, B2, C2, D2), l'ensemble de compresseur (10) est en communication avec le premier orifice de soupape (A1), l'échangeur de chaleur externe (20) est en communication avec le huitième orifice de soupape (D2), le dispositif de chauffage et d'accumulation de chaleur (50) présente une première extrémité en communication avec le quatrième orifice de soupape (D1) et une deuxième extrémité en communication avec le cinquième orifice de soupape (A2), l'échangeur de chaleur interne (30) présente une première extrémité en communication avec le deuxième orifice de soupape (B1) et le sixième orifice de soupape (B2) et une deuxième extrémité en communication avec l'échangeur de chaleur externe (20), le troisième orifice de soupape (C1) et le septième orifice de soupape (C2) sont tous deux en communication avec une extrémité d'aspiration de l'ensemble de compresseur (10) ;
    dans lequel le dispositif de commutation (40) est configuré de telle façon que pendant le fonctionnement dans le premier mode de chauffage, le premier orifice de soupape (A1) de la première soupape à quatre voies (41) est en communication avec le quatrième orifice de soupape (D1) de la première soupape à quatre voies (41), et le cinquième orifice de soupape (A2) de la deuxième soupape à quatre voies (42) est en communication avec le sixième orifice de soupape (B2), le septième orifice de soupape (C2) est en communication avec le huitième orifice de soupape (D2) de la deuxième soupape à quatre voies (42), respectivement ;
    dans le deuxième mode de chauffage, le premier orifice de soupape (A1) de la première soupape à quatre voies (41) est en communication avec le deuxième orifice de soupape (B1) de la première soupape à quatre voies (41), et le septième orifice de soupape (C2) de la deuxième soupape à quatre voies (42) est en communication avec le huitième orifice de soupape (D2) de la deuxième soupape à quatre voies (42), respectivement ;
    dans le mode de dégivrage, le premier orifice de soupape (A1) de la première soupape à quatre voies (41) est en communication avec le deuxième orifice de soupape (B1), le troisième orifice de soupape (C1) est en communication avec le quatrième orifice de soupape (D1) de la première soupape à quatre voies (41), respectivement, et le cinquième orifice de soupape (A2) de la deuxième soupape à quatre voies (42) est en communication avec le huitième orifice de soupape (D2) de la deuxième soupape à quatre voies (42),
    dans lequel le dispositif de commutation (40) comprend en outre une première soupape solénoïde (43), et la première soupape solénoïde (43) est disposée entre le sixième orifice de soupape (B2) et le côté de l'échangeur de chaleur interne (30) raccordé au deuxième orifice de soupape (B1),
    dans lequel le système de pompe à chaleur comprend en outre une deuxième soupape de retenue (80), et la deuxième soupape de retenue (80) est raccordée entre le deuxième orifice de soupape (B1) et l'échangeur de chaleur interne (30).
  2. Système de pompe à chaleur selon la revendication 1, dans lequel le système de pompe à chaleur comprend en outre une première soupape de retenue (60), et la première soupape de retenue (60) est raccordée entre l'échangeur de chaleur externe (20) et le dispositif de chauffage et d'accumulation de chaleur (50).
  3. Système de pompe à chaleur selon la revendication 2, dans lequel le système de pompe à chaleur comprend en outre un dispositif d'étranglement (70), et le dispositif d'étranglement (70) présente une première extrémité en communication avec le dispositif de chauffage et d'accumulation de chaleur (50) et une deuxième extrémité en communication avec le cinquième orifice de soupape (A2) et la première soupape de retenue (60).
  4. Système de pompe à chaleur selon l'une quelconque des revendications 1 à 3, dans lequel le système de pompe à chaleur présente en outre un mode de réfrigération commuté par le dispositif de commutation (40), et
    dans lequel le dispositif de commutation (40) est configuré de telle façon que pendant le fonctionnement dans le mode de réfrigération, le premier orifice de soupape (A1) de la première soupape à quatre voies (41) est en communication avec le quatrième orifice de soupape (D1) de la première soupape à quatre voies (41), le cinquième orifice de soupape (A2) de la deuxième soupape à quatre voies (42) est en communication avec le huitième orifice de soupape (D2), et le sixième orifice de soupape (B2) est en communication avec le septième orifice de soupape (C2) de la deuxième soupape à quatre voies (42), respectivement.
  5. Système de pompe à chaleur selon l'une quelconque des revendications 1 à 4, dans lequel le dispositif de chauffage et d'accumulation de chaleur (50) comprend une deuxième soupape solénoïde et un échangeur de chaleur (52), et l'échangeur de chaleur (52) est raccordé en série à la deuxième soupape solénoïde et en communication avec le dispositif de commutation (40) ;
    le dispositif de chauffage et d'accumulation de chaleur (50) comprend en outre un ensemble de chauffage (51) et/ou un ensemble d'accumulation de chaleur disposé(s) sur une paroi extérieure de l'échangeur de chaleur (52).
  6. Système de pompe à chaleur selon la revendication 5, dans lequel l'ensemble de chauffage (51) est configuré comme un chauffage exogène ; et/ou
    l'ensemble d'accumulation de chaleur est configuré comme un accumulateur de chaleur.
  7. Climatisation comprenant un système de pompe à chaleur (100) selon l'une quelconque des revendications 1 à 6.
EP19801655.2A 2018-10-24 2019-05-30 Système de pompe à chaleur et climatiseur Active EP3680578B1 (fr)

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CN111780465A (zh) * 2020-06-22 2020-10-16 上海爱斯达克汽车空调系统有限公司 无需停机的电动汽车热泵除霜系统及其运行方法
CN115076966A (zh) * 2021-03-15 2022-09-20 广东美的暖通设备有限公司 空调器的控制方法及装置
CN113587469B (zh) * 2021-08-02 2022-11-15 珠海格力节能环保制冷技术研究中心有限公司 一种温控系统的控制装置、方法和温控系统
CN114110846B (zh) * 2021-11-23 2023-05-02 珠海格力电器股份有限公司 一种蓄能热泵系统及其控制方法

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CN103791569B (zh) * 2012-10-30 2016-10-05 珠海格力电器股份有限公司 热泵式空调系统
CN203964489U (zh) * 2014-07-01 2014-11-26 珠海格力电器股份有限公司 空调热泵系统
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