WO2021036115A1 - Système de réfrigération - Google Patents

Système de réfrigération Download PDF

Info

Publication number
WO2021036115A1
WO2021036115A1 PCT/CN2019/126803 CN2019126803W WO2021036115A1 WO 2021036115 A1 WO2021036115 A1 WO 2021036115A1 CN 2019126803 W CN2019126803 W CN 2019126803W WO 2021036115 A1 WO2021036115 A1 WO 2021036115A1
Authority
WO
WIPO (PCT)
Prior art keywords
evaporator
refrigeration device
refrigeration
communication
refrigeration system
Prior art date
Application number
PCT/CN2019/126803
Other languages
English (en)
Chinese (zh)
Inventor
刘华
韩鹏
齐方成
何汝龙
王铭坤
刘畅
卢起彪
孙哲
Original Assignee
珠海格力电器股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 珠海格力电器股份有限公司 filed Critical 珠海格力电器股份有限公司
Publication of WO2021036115A1 publication Critical patent/WO2021036115A1/fr

Links

Images

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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
    • 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

Definitions

  • the present disclosure relates to the field of heat exchange technology, and in particular to a refrigeration system.
  • Refrigerator is a kind of refrigeration equipment that keeps a constant low temperature, and it is also a kind of civilian product that keeps food or other items in a constant low temperature and cold state.
  • Refrigerators generally have refrigeration and freezing functions, and their refrigeration and freezing functions are realized by a refrigeration system, which generally includes a compressor, a condenser, a throttling mechanism, and an evaporator. Refrigerators require different cooling capacity under the refrigeration function and the freezing function (that is, the refrigeration load carried by the compressor of the refrigeration system is different under the refrigeration function and the freezing function).
  • the load provided by the compressor of the traditional refrigeration system cannot meet the requirements of both the refrigeration function and the refrigeration function at the same time.
  • the compressor is generally selected according to the lowest temperature working condition (the load required by the compressor and the refrigeration function is completely Matching, but greater than the load required by the refrigeration function), the selected compressor has a large discharge capacity, and the comprehensive power consumption of the refrigeration system is large, which causes a waste of resources.
  • a refrigeration system including:
  • a multi-stage compressor including at least two stages of compression parts connected in sequence;
  • the first refrigeration device has a first intake end and a first exhaust end, the first exhaust end is connected between any two stages of the compression part; the first intake end and the any two stages In the compression section, the exhaust port of the high-level compression section is communicated with, or is connected with the exhaust port of the high-level compression section higher than that of the high-level compression section;
  • the second refrigeration device has a second intake end and a second exhaust end, the second intake end is in communication with the exhaust port of the compression part of the highest stage, and the second exhaust end is connected to the lowest stage.
  • the return air port of the compression part is connected;
  • the bypass mechanism is arranged between the first exhaust end and the air return port of the compression part at the lowest stage;
  • the bypass mechanism is turned on when the first refrigeration device is working and the second refrigeration device is stopped. At this time, the low-stage compression part of the multi-stage compressor is idling, so that the load provided by the multi-stage compressor is the same as the first refrigeration unit. The load required by the device is matched, which avoids the excessive load provided by the multi-stage compressor and reduces the waste of resources.
  • the bypass mechanism includes a first communication line and a first valve, and the first communication line is connected to one of the first exhaust end and the return port of the compression part at the lowest stage.
  • the first valve is assembled on the first communication pipeline for controlling the on-off of the first communication pipeline.
  • the first refrigeration device includes a condenser, a first throttling mechanism, and a first evaporator that are connected in sequence, and the inlet end of the condenser forms the first refrigeration device of the first refrigeration device.
  • An intake end, and the exhaust end of the first evaporator forms the first exhaust end of the first refrigeration device.
  • the refrigeration system further includes a parallel mechanism, one end of the parallel mechanism is connected between the first throttle mechanism and the first evaporator, and the other end is connected to the first evaporator. Connected to the same position of the multi-stage compressor;
  • the parallel mechanism includes a second communication pipeline and a second valve, one end of the second communication pipeline is connected between the first throttle mechanism and the first evaporator, The other end is in communication with the multi-stage compressor, and the second valve is assembled on the second communication pipeline for controlling the on-off of the second communication pipeline.
  • the first refrigeration device further includes a first regenerator for the first refrigerant flowing from the first evaporator to the multi-stage compressor, and The second refrigerant flowing to the first evaporator exchanges heat in the first throttle mechanism or after being throttled by the first throttle mechanism.
  • the second refrigeration device and the first refrigeration device share the condenser;
  • the second refrigeration device further includes a second throttling mechanism and a second evaporator, the condenser,
  • the second throttling mechanism and the second evaporator are connected in sequence, the inlet end of the condenser forms the second inlet end of the second refrigeration device, and the exhaust of the second evaporator The end forms the second exhaust end of the second refrigeration device.
  • the refrigeration system further includes a parallel mechanism, one end of the parallel mechanism is connected between the first throttle mechanism and the first evaporator, and the other end is connected to the first evaporator. Connected to the same position of the multi-stage compressor;
  • One end of the second throttling mechanism is in communication with the first evaporator and the parallel mechanism, and the other end of the second throttling mechanism is in communication with the second evaporator;
  • the refrigeration system further includes a third communication pipeline and a third valve, and the third communication pipeline communicates with the first evaporator and the parallel mechanism and the second throttle Between the mechanisms, the third valve is assembled on the third communication pipeline to control the on-off of the third communication pipeline.
  • the refrigeration system further includes a gas-liquid separation mechanism, the gas-liquid separation mechanism is connected between the first evaporator and the parallel mechanism and the multi-stage compressor, and the first The second throttling mechanism is in communication with the first evaporator and the parallel mechanism through the gas-liquid separation mechanism, the gas-liquid separation mechanism is in communication with the multi-stage compressor, and the gas-liquid separation mechanism The liquid outlet end is in communication with the second throttling mechanism.
  • the second refrigeration device further includes a second regenerator for the third refrigerant flowing from the second evaporator to the multi-stage compressor, and the third refrigerant flowing from the second evaporator to the multi-stage compressor.
  • the fourth refrigerant that flows to the second evaporator after being throttled by the second throttling mechanism or through the second throttling mechanism exchanges heat.
  • Fig. 1 is a schematic diagram of a refrigeration system provided by an embodiment of the disclosure
  • Fig. 2 is a schematic diagram of the refrigeration system shown in Fig. 1 when both the first refrigeration device and the second refrigeration device are working;
  • Fig. 3 is a schematic diagram of the refrigeration system shown in Fig. 1 when the second refrigeration device is working and the first refrigeration device is shut down;
  • Fig. 4 is a schematic diagram of the refrigeration system shown in Fig. 1 when the first refrigeration device is working and the second refrigeration device is shut down.
  • Refrigeration system 100 Multi-stage compressor 10 First compression part 11 Second compression part 12 Condenser 21 First throttling mechanism 22 First evaporator 23 First regenerator 24 Fourth communication pipeline 25 Fifth communication pipeline 26 First fan 27 Second fan 28 Second throttling mechanism 31 Second evaporator 32 Second regenerator 33 Sixth communicating pipeline 34 Seventh communicating pipeline 35 Fourth valve 36 Third fan 37 Bypass mechanism 40 One connecting pipeline 41 First valve 42 Parallel mechanism 50 Second connecting pipeline 51 Second valve 52 Third connecting pipeline 60 Third valve 70 Gas-liquid separation mechanism 80
  • an embodiment of the present disclosure provides a refrigeration system 100.
  • the refrigeration system 100 is applied to a refrigerator. It is understandable that in some other embodiments, the refrigeration system 100 can also be applied to other refrigeration equipment, which is not limited herein.
  • the refrigeration system 100 includes a multi-stage compressor 10 and a first refrigeration device (not shown).
  • the first refrigeration device has a first intake end (not shown) and a first exhaust end (not shown).
  • the high-temperature and high-pressure gas formed after compression by the compressor 10 enters the first refrigeration device from the first intake end, and flows back to the multi-stage compressor 10 from the first exhaust end after the refrigeration cycle to be compressed again.
  • the refrigeration system 100 also includes a second refrigeration device (not shown).
  • the second refrigeration device has a second intake end and a second exhaust end.
  • the high-temperature and high-pressure gas compressed by the multi-stage compressor 10 is compressed from the second intake
  • the end enters the first refrigeration device, and after the refrigeration cycle, it flows back from the second exhaust end to the multi-stage compressor 10 for compression again.
  • the first refrigeration device is used to realize the refrigeration function of the refrigerator
  • the second refrigeration device is used to realize the freezing function of the refrigerator. Therefore, the evaporation temperature provided by the second refrigeration device is lower than the evaporation temperature provided by the first refrigeration device, so that the first refrigeration device
  • the device and the second refrigeration device respectively meet the requirements of the refrigerating function and the freezing function of the refrigerator.
  • the multi-stage compressor 10 includes at least two-stage compression parts, and the at least two-stage compression parts are sequentially communicated with each other.
  • the first exhaust end of the first refrigeration device is connected between any two-stage compression section, and the first intake end of the first refrigeration device is connected with the exhaust port of the high-level compression section of any two-stage compression section mentioned above, or the first
  • the first intake end of the refrigeration device is in communication with the exhaust port of the compression section higher in level than the high-level compression section of any two-stage compression section described above.
  • the second intake end of the second refrigeration device is communicated with the exhaust port of the highest-stage compression part, and the second exhaust port of the second refrigeration device is communicated with the return air port of the lowest-stage compression part.
  • the evaporation temperature provided by the second refrigeration device can be lower than the evaporation temperature provided by the first refrigeration device, so that the second refrigeration device meets the freezing function requirements of the refrigerator, and the first refrigeration device meets the refrigeration function requirements of the refrigerator;
  • the intake and exhaust ends of the first refrigeration device and the second refrigeration device are respectively communicated with different compression parts of the multi-stage compressor 10, so that the load provided by the multi-stage compressor 10 can be compared with the first refrigeration device and the second refrigeration device.
  • the load required by the two refrigeration devices is matched, and the multi-stage compressor 10 has a higher working effect, thereby reducing the waste of resources.
  • first refrigeration device and second refrigeration device can work at the same time or separately, that is, when the refrigeration system 100 is applied to a refrigerator, the refrigerator can realize the refrigeration function or the freezing function alone, or realize the refrigeration at the same time. Function and freezing function.
  • the multi-stage compressor 10 is a two-stage compressor.
  • the multi-stage compressor 10 includes two compression parts, namely, a first compression part 11 and a second compression part 12. It is higher than the level of the first compression part 11.
  • the first exhaust end of the first refrigeration device is connected between the first compression part 11 and the second compression part 12, and the first intake end of the first refrigeration device is communicated with the exhaust port of the second compression part 12.
  • the second exhaust end of the second refrigeration device is in communication with the air return port of the first compression section 11, and the second intake end of the second refrigeration device is in communication with the exhaust port of the second compression section 12.
  • the multi-stage compressor 10 may also be a three-stage or more than three-stage compressor, which is not limited herein.
  • the multi-stage compressor 10 is a two-stage compressor as an example.
  • the multi-stage compressor 10 includes two compression parts, namely a first compression part 11 and a second compression part. 12.
  • the level of the second compression part 12 is higher than the level of the first compression part 11.
  • the refrigeration system 100 further includes a bypass mechanism 40 provided between the first exhaust end of the first refrigeration device and the air return port of the first compression part 11. Specifically, when the first refrigeration device is working and the second refrigeration device is stopped, the bypass mechanism 40 is turned on.
  • the bypass mechanism 40 Since the bypass mechanism 40 is turned on when the first refrigeration device is working and the second refrigeration device is stopped, the first exhaust end of the first refrigeration device is not only in communication with the first compression part 11 and the second compression part 12 at this time. , And the first exhaust end communicates with the air return port of the first compression part 11 through the bypass mechanism 40, so that the pressure of the air inlet and the air outlet of the first compression part 12 are equal, and the first compression part 11 is idling at this time, so The load provided by the multi-stage compressor 10 is matched with the load required by the first refrigeration device, thereby avoiding the waste of resources.
  • the bypass mechanism 40 includes a first communication pipe 41 and a first valve 42, and the first communication pipe 41 is connected to the first exhaust end of the first refrigeration device and the air return port of the first compression part 11.
  • the first valve 42 is assembled on the first communication line 41 and used to control the on and off of the first communication line 41. In this way, the opening and closing of the bypass mechanism 40 can be controlled by operating the first valve 42.
  • the first valve 42 is an automatic valve. Understandably, in some other embodiments, the first valve 42 may also be a manual valve, which is not limited here.
  • the first refrigeration device includes a condenser 21, a first throttling mechanism 22, and a first evaporator 23 that are connected in sequence, and the intake end of the condenser 21 forms the first refrigeration device.
  • An intake end, and the exhaust end of the first evaporator 23 forms the first exhaust end of the first refrigeration device.
  • the high-temperature and high-pressure gaseous refrigerant After being condensed by the condenser 21, the high-temperature and high-pressure gaseous refrigerant will It becomes a liquid refrigerant of normal temperature and high pressure.
  • the refrigerant After being condensed, the refrigerant enters the first throttle mechanism 22 (capillary tube, thermal expansion valve or electronic expansion valve, etc.). Through the throttling and decompression of the first throttle mechanism 22, the pressure of the refrigerant is reduced.
  • the resulting low-temperature and low-pressure liquid refrigerant finally enters the first evaporator 23, where it absorbs heat and evaporates into a low-temperature and low-pressure gaseous refrigerant, and then is sucked into the multi-stage compressor 10, and the cycle repeats.
  • the first refrigeration device further includes a first heat regenerator 24, which is used for the first refrigerant flowing from the first evaporator 23 to the multi-stage compressor 10, and the first refrigerant flowing through the first throttle mechanism 22
  • the second refrigerant flowing into the first evaporator 23 after being throttled by the first throttle mechanism 22 exchanges heat.
  • the first refrigeration device further includes a fourth communication pipe 25 and a fifth communication pipe 26, the fourth communication pipe 25 is connected between the condenser 21 and the first evaporator 23, and the first throttle mechanism 22 It is arranged on the fourth communication pipe 25, and the fifth communication pipe 26 communicates between the first evaporator 23 and the multi-stage compressor 10.
  • the first throttle mechanism 22 is disposed in the first regenerator 24, and the fifth communication pipe 26 passes through the first regenerator 24.
  • the first refrigerant flowing in the fifth communication pipe 26 exchanges heat with the second refrigerant flowing in the first throttle mechanism 22, thereby increasing the temperature of the refrigerant flowing to the multi-stage compressor 10, thereby increasing The superheat of the refrigerant entering the multi-stage compressor 10 avoids liquid back in the multi-stage compressor 10; and the second refrigerant flowing in the first throttle mechanism 22 and the first refrigerant flowing in the fifth communication pipe 26
  • the heat exchange reduces the temperature of the refrigerant flowing into the first evaporator 23, thereby increasing the degree of subcooling of the refrigerant entering the first evaporator 23.
  • the part of the fourth communication pipe 25 between the first throttling mechanism 22 and the first evaporator 23 can be arranged to pass through the first regenerator 24.
  • the second refrigerant throttled by the first throttle mechanism 22 exchanges heat with the first refrigerant flowing in the fifth communication pipe 26.
  • the first refrigeration device further includes a first fan 27 and a second fan 28.
  • the first fan 27 is arranged around the condenser 21 for heat dissipation of the condenser 21, and the second fan 28 is arranged at the first fan.
  • the evaporator 23 is used to accelerate the flow of cold air.
  • the refrigeration system 100 further includes a parallel mechanism 50.
  • One end of the parallel mechanism 50 is connected between the first throttle mechanism 22 and the first evaporator 23, and the other end is connected to the first evaporator 23 in a multi-stage compression. The same location of machine 10. More specifically, when the second refrigeration device is working and the first refrigeration device is shut down, the parallel mechanism 50 is turned on.
  • the parallel mechanism 50 When the second refrigeration device is working and the first refrigeration device is shut down, the parallel mechanism 50 is turned on. At this time, the refrigerant formed after being throttled by the first throttle mechanism 22 of the first refrigeration device enters the multi-stage compressor from the parallel mechanism 50 10 supplements air, thereby improving the efficiency of the multi-stage compressor 10 when working.
  • the parallel mechanism 50 includes a second communication pipe 51 and a second valve 52.
  • One end of the second communication pipe 51 is connected between the first throttling mechanism 22 and the first evaporator 23, and the other end is connected to the multi-stage compressor.
  • the machine 10 is in communication, and the second valve 52 is assembled on the second communication pipeline 51 to control the on and off of the second communication pipeline 51. In this way, the on-off of the parallel mechanism 50 can be controlled by operating the second valve 52.
  • the second valve 52 is an automatic valve. Understandably, in some other embodiments, the second valve 52 may also be a manual valve, which is not limited here.
  • the second refrigeration device and the first refrigeration device share the same condenser 21. Understandably, in other embodiments, the second refrigeration device and the first refrigeration device may also use different condensers 21.
  • the second refrigeration device further includes a second throttling mechanism 31 and a second evaporator 32.
  • the condenser 21, the second throttling mechanism 31, and the second evaporator 32 are connected in sequence, and the intake end of the condenser 21 forms a second evaporator.
  • the second intake end of the second refrigeration device and the exhaust end of the second evaporator 32 form the second exhaust end of the second refrigeration device.
  • the high-temperature and high-pressure gaseous refrigerant After being condensed by the condenser 21, the high-temperature and high-pressure gaseous refrigerant will It becomes a liquid refrigerant of normal temperature and high pressure. After being condensed, the refrigerant enters the second throttling mechanism 31. Through the throttling and decompression of the second throttling mechanism 31, the pressure of the refrigerant decreases, and the resulting low-temperature and low-pressure liquid refrigerant finally enters In the second evaporator 32, the second evaporator 32 absorbs heat and evaporates into a low-temperature and low-pressure gaseous refrigerant, and then sucks into the multi-stage compressor 10, and so on.
  • one end of the second throttling mechanism 31 is in communication with the first evaporator 23 and the parallel mechanism 50, and the other end of the second throttling mechanism 31 is in communication with the second evaporator 32.
  • the second throttling mechanism 31 is connected to the first throttling mechanism 22 through the parallel mechanism 50, thereby realizing the secondary throttling of the second refrigeration device, and
  • part of the gas flows back to the multi-stage compressor 10 through the parallel mechanism 50 for supplementary gas; and when the first refrigeration device and the second refrigeration device are working at the same time, part of the gas flowing out of the first evaporator 23 passes through
  • the second throttling mechanism 31 flows back to the air return port of the first compression part 11 after the second throttling, and partly flows back directly between the first compression part 11 and the second compression part 12, which meets the refrigeration and freezing requirements of the refrigerator.
  • the refrigeration system 100 further includes a third communication pipe 60 and a third valve 70, and the third communication pipe 60 is connected between the first evaporator 23 and the parallel mechanism 50 and the second throttle mechanism 31,
  • the third valve 70 is assembled on the third communication line 60 to control the on and off of the third communication line 60.
  • the operation of the second refrigeration device can be easily controlled. For example, when the third valve 70 is opened, the second refrigeration device stops, and when the third valve 70 is opened, the second refrigeration device operates.
  • the third valve 70 is an automatic valve. Understandably, in some other embodiments, the third valve 70 may also be a manual valve, which is not limited here.
  • the refrigeration system 100 further includes a gas-liquid separation mechanism 80.
  • the gas-liquid separation mechanism 80 is connected between the first evaporator 23 and the parallel mechanism 50 and the multi-stage compressor 10, and the second throttle mechanism 31 passes through the gas-liquid separation mechanism.
  • the separation mechanism 80 communicates with the first evaporator 23 and the parallel mechanism 50, the gas outlet of the gas-liquid separation mechanism 80 communicates with the multi-stage compressor 10, and the liquid outlet of the gas-liquid separation mechanism 80 communicates with the second throttle mechanism 31.
  • the fourth communication pipeline 25 includes a first communication section and a second communication section.
  • the first communication section is connected between the first evaporator 23 and the gas-liquid separation mechanism 80, and the second communication section is connected with the gas-liquid separation mechanism. Between the air outlet end of 80 and the multi-stage compressor 10, the second communication section passes through the first regenerator 24 to exchange heat.
  • the first communication pipe 41 of the bypass mechanism 40 communicates with the second communication section.
  • One end of the second communication pipe 51 is connected between the first throttle mechanism 22 and the first evaporator 23, and the other end passes through the first communication section. It communicates with the inlet end of the gas-liquid separation mechanism 80.
  • the third communication pipe 60 communicates between the liquid outlet end of the gas-liquid separation mechanism 80 and the second throttle mechanism 31.
  • the gas-liquid separation mechanism 80 can be a flash tank or a gas-liquid separator, which is not limited here.
  • the second refrigeration device also includes a second heat regenerator 33.
  • the second heat regenerator 33 is used for the third refrigerant flowing from the second evaporator 32 to the multi-stage compressor 10, and the third refrigerant flowing in the second throttling mechanism 31 or passing through The fourth refrigerant flowing to the second evaporator 32 after being throttled by the second throttle mechanism 31 exchanges heat.
  • the second refrigeration device further includes a sixth communication pipe 34, which communicates between the second evaporator 32 and the multi-stage compressor 10, and the second throttling mechanism 31 is provided in the second heat recovery unit.
  • the sixth connecting pipe 34 passes through the second regenerator 33.
  • the third refrigerant flowing in the sixth communication pipe 34 exchanges heat with the fourth refrigerant flowing in the second throttle mechanism 31, thereby increasing the temperature of the refrigerant flowing to the multi-stage compressor 10, thereby increasing the temperature of the refrigerant flowing into the multi-stage compressor 10
  • the superheat of the refrigerant in the multi-stage compressor 10 avoids liquid back in the multi-stage compressor 10; and the fourth refrigerant flowing in the second throttle mechanism 31 is exchanged with the third refrigerant flowing in the sixth communication pipe 34 Heat, thereby reducing the temperature of the refrigerant flowing into the second evaporator 32, thereby increasing the degree of subcooling of the refrigerant entering the second evaporator 32.
  • the second refrigeration device further includes a seventh communication pipe 35, which communicates between the second throttling mechanism 31 and the second evaporator 32, and the seventh communication pipe 35 is connected between the second throttle mechanism 31 and the second evaporator 32.
  • the communication pipe 35 passes through the second heat regenerator 33, at this time, the fourth refrigerant throttling by the second throttling mechanism 31 exchanges heat with the third refrigerant flowing in the sixth communication pipe 34.
  • the second refrigeration device further includes a fourth valve 36, the fourth valve 36 is assembled on the sixth communication pipeline 34, and the first communication pipeline 41 of the bypass mechanism 40 is connected to the sixth communication pipeline 34 through the sixth communication pipeline 34.
  • the air return port of the first compression part 11 is in communication, and the communication place between the first communication pipe 41 and the sixth communication pipe 34 is located downstream of the fourth valve 36, which can control the on and off of the second refrigeration device.
  • the second refrigeration device further includes a third fan 37 which is arranged around the second evaporator 32 for accelerating the flow of cold air.
  • the working principle of the refrigeration system 100 provided by the embodiment of the present disclosure is as follows:
  • the control bypass mechanism 40 and the parallel mechanism 50 are both disconnected.
  • the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust port of the second compression part 12 of the multi-stage compressor 10 enters the condenser 21 and is condensed Heat is released in the condenser 21.
  • the high-temperature and high-pressure gaseous refrigerant will become a normal-temperature and high-pressure liquid refrigerant.
  • the refrigerant enters the first throttle mechanism 22 after being condensed, and is reduced by the first throttle mechanism 22.
  • the gas refrigerant enters the gas-liquid separation mechanism 80 for gas-liquid separation.
  • the saturated water vapor formed after the separation passes through the first regenerator 24 and then enters the multi-stage compressor from between the first compression part 11 and the second compression part 12 10. Realize the function of refrigeration; the saturated water formed after separation is throttled again by the second throttling mechanism 31 and then enters the second evaporator 32 to evaporate.
  • the low-temperature and low-pressure gaseous refrigerant formed by the evaporation passes through the second heat regenerator 33 to exchange heat from The air return port of the first compression part 11 enters the multi-stage compressor 10.
  • the first refrigeration device is controlled to stop, the parallel mechanism 50 is turned on, and the bypass mechanism 40 is disconnected.
  • the high temperature and high pressure gaseous refrigerant discharged from the exhaust port of the second compression part 12 of the multi-stage compressor 10 enters the condensation In the condenser 21, the heat is released in the condenser 21.
  • the high-temperature and high-pressure gaseous refrigerant will become a normal-temperature and high-pressure liquid refrigerant.
  • the refrigerant enters the first throttling mechanism 22 after being condensed, and passes through the first section.
  • the flow mechanism 22 is throttled and reduced, and the pressure of the refrigerant is reduced.
  • the resulting low-temperature and low-pressure liquid refrigerant passes through the parallel mechanism 50 and enters the gas-liquid separation mechanism 80 for gas-liquid separation.
  • the saturated water vapor formed after separation undergoes the first reheating After the heat exchange, the evaporator 24 is used for supplementing air from the space between the first compression part 11 and the second compression part 12; the saturated water formed after separation is throttled again by the second throttling mechanism 31 and then enters the second evaporator 32 to evaporate and evaporate.
  • the formed low-temperature and low-pressure gaseous refrigerant passes through the second heat regenerator 33 and then enters the multi-stage compressor 10 from the air return port of the first compression part 11.
  • the second refrigeration device is controlled to stop, the parallel mechanism 50 is disconnected, and the bypass mechanism 40 is turned on.
  • the high temperature and high pressure gaseous refrigerant discharged from the exhaust port of the second compression part 12 of the multi-stage compressor 10 enters the condensation In the condenser 21, the heat is released in the condenser 21.
  • the high-temperature and high-pressure gaseous refrigerant will become a normal-temperature and high-pressure liquid refrigerant.
  • the refrigerant enters the first throttling mechanism 22 after being condensed, and passes through the first section. The throttling and decompression of the flow mechanism 22 reduces the pressure of the refrigerant.
  • the resulting low-temperature and low-pressure liquid refrigerant finally enters the first evaporator 23, where it absorbs heat and evaporates into a low-temperature and low-pressure gaseous refrigerant.
  • the gas refrigerant flowing out of the first evaporator 23 enters the gas-liquid separation mechanism 80 for gas-liquid separation, and the saturated water vapor formed after separation enters the first compression part 11 and the second compression part after heat exchange through the first regenerator 24
  • part of it enters the multi-stage compressor 10 from the return port of the first compression part 11 through the bypass mechanism 40.
  • the pressure of the air inlet and the air outlet of the first compression part 11 are equal, so that the first compression is realized.
  • the part 11 is idling to realize the refrigeration function.
  • the load provided by the multi-stage compressor 10 matches the load required by the refrigeration function, which improves the work efficiency; the saturated water formed after separation is discharged to the outside.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

L'invention concerne un système de réfrigération (100) comprenant : un compresseur multi-niveau (10) comprenant au moins deux niveaux de parties de compression en communication séquentielle ; un premier dispositif de réfrigération doté d'une première extrémité d'entrée de gaz et d'une première extrémité d'évacuation de gaz, la première extrémité d'évacuation de gaz communiquant avec les parties de compression à deux niveaux quelconques, la première extrémité d'entrée de gaz communiquant avec une ouverture d'évacuation de gaz de la partie de compression de niveau supérieur des parties de compression à deux niveaux quelconques ou communiquant avec une ouverture d'évacuation de gaz d'une partie de compression à un niveau supérieur à la partie de compression de niveau supérieur ; un second dispositif de réfrigération muni d'une seconde extrémité d'entrée de gaz et d'une seconde extrémité d'évacuation de gaz, la seconde extrémité d'entrée de gaz communiquant avec une ouverture d'évacuation de gaz de la partie de compression au niveau le plus haut, et la seconde extrémité d'évacuation de gaz communiquant avec une ouverture de retour de gaz de la partie de compression au niveau le plus bas ; et un mécanisme de dérivation (40) disposé entre la première extrémité d'évacuation de gaz et l'ouverture de retour de gaz de la partie de compression au niveau le plus bas. Lorsque le premier dispositif de réfrigération fonctionne et que le second dispositif de réfrigération s'arrête de fonctionner, le mécanisme de dérivation (40) est mis sous tension et la partie de compression à un niveau inférieur dans le compresseur multi-niveau est au ralenti de sorte qu'une charge fournie par le compresseur corresponde à une charge requise par le premier dispositif de réfrigération, ce qui permet de réduire l'utilisation inefficace de ressources.
PCT/CN2019/126803 2019-08-26 2019-12-20 Système de réfrigération WO2021036115A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910790697.XA CN110411047A (zh) 2019-08-26 2019-08-26 制冷系统
CN201910790697.X 2019-08-26

Publications (1)

Publication Number Publication Date
WO2021036115A1 true WO2021036115A1 (fr) 2021-03-04

Family

ID=68368621

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/126803 WO2021036115A1 (fr) 2019-08-26 2019-12-20 Système de réfrigération

Country Status (2)

Country Link
CN (1) CN110411047A (fr)
WO (1) WO2021036115A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110411047A (zh) * 2019-08-26 2019-11-05 珠海格力电器股份有限公司 制冷系统
CN111121342B (zh) * 2019-12-31 2021-11-05 青岛海信日立空调系统有限公司 热泵系统

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003254661A (ja) * 2002-02-27 2003-09-10 Toshiba Corp 冷蔵庫
JP2005134080A (ja) * 2003-10-31 2005-05-26 Toshiba Corp 冷蔵庫
CN101970953A (zh) * 2008-01-17 2011-02-09 开利公司 二氧化碳制冷剂蒸汽压缩系统
KR20150089228A (ko) * 2014-01-27 2015-08-05 엘지전자 주식회사 냉장고
CN105466061A (zh) * 2015-12-29 2016-04-06 西安交通大学 一种两级压缩冰箱系统及其工作方法
WO2016117946A1 (fr) * 2015-01-23 2016-07-28 Lg Electronics Inc. Appareil à cycle de refroidissement pour réfrigérateur
CN106471322A (zh) * 2014-07-21 2017-03-01 Lg电子株式会社 冰箱及其控制方法
CN108800393A (zh) * 2018-08-07 2018-11-13 珠海格力电器股份有限公司 空调系统
CN110411047A (zh) * 2019-08-26 2019-11-05 珠海格力电器股份有限公司 制冷系统

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003254661A (ja) * 2002-02-27 2003-09-10 Toshiba Corp 冷蔵庫
JP2005134080A (ja) * 2003-10-31 2005-05-26 Toshiba Corp 冷蔵庫
CN101970953A (zh) * 2008-01-17 2011-02-09 开利公司 二氧化碳制冷剂蒸汽压缩系统
KR20150089228A (ko) * 2014-01-27 2015-08-05 엘지전자 주식회사 냉장고
CN106471322A (zh) * 2014-07-21 2017-03-01 Lg电子株式会社 冰箱及其控制方法
WO2016117946A1 (fr) * 2015-01-23 2016-07-28 Lg Electronics Inc. Appareil à cycle de refroidissement pour réfrigérateur
CN105466061A (zh) * 2015-12-29 2016-04-06 西安交通大学 一种两级压缩冰箱系统及其工作方法
CN108800393A (zh) * 2018-08-07 2018-11-13 珠海格力电器股份有限公司 空调系统
CN110411047A (zh) * 2019-08-26 2019-11-05 珠海格力电器股份有限公司 制冷系统

Also Published As

Publication number Publication date
CN110411047A (zh) 2019-11-05

Similar Documents

Publication Publication Date Title
RU2660234C2 (ru) Холодильный аппарат
US9347697B2 (en) Air conditioner and control method thereof
CN110332635B (zh) 一种双级压缩多补气制冷热泵系统、控制方法和空调器
CN107178833B (zh) 热回收外机系统和空调系统
CN108759138B (zh) 二次节流中间不完全冷却制冷系统的运行方法及系统
WO2018121425A1 (fr) Système de réfrigération utilisant des évaporateurs doubles connectés en parallèle et en série, et son procédé de commande
WO2016000656A1 (fr) Système de climatisation
EP3364128B1 (fr) Système de commande d'unité pompe à chaleur
CA3066275C (fr) Unite exterieure d'injection de vapeur amelioree ayant deux tubes et systeme a divisions multiples
CN105423656A (zh) 制冷系统及其控制方法
WO2021036115A1 (fr) Système de réfrigération
JP2010078164A (ja) 冷凍空調装置
CN108800393B (zh) 空调系统
CN108759139B (zh) 具有中温蒸发器的一次节流中间不完全冷却的制冷系统
WO2021057137A1 (fr) Système de réfrigération et stockage réfrigéré
JP6253370B2 (ja) 冷凍サイクル装置
JP2010078165A (ja) 冷凍空調装置
CN210425610U (zh) 制冷系统
CN108240722B (zh) 一种多循环变流量制冷系统
CN108088008B (zh) 一种多联机热回收系统及空气调节装置
US11892214B2 (en) Outdoor unit and heat pump system
WO2018074370A1 (fr) Système de réfrigération et unité intérieure
CN215951838U (zh) 制冷系统及家用电器
CN112361634B (zh) 双级压缩制冷系统、制冷控制方法及制冷设备
CN214250176U (zh) 具有深冷冻功能的制冷系统

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19942972

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19942972

Country of ref document: EP

Kind code of ref document: A1