Heat pump air conditioning system and vehicle

Abstract

The invention discloses a heat pump air-conditioning system and a vehicle, and the heat pump air-conditioning system comprises an air-conditioning loop which comprises a gas-liquid separator, a compressor, an indoor condenser, an outdoor heat exchanger, an indoor evaporator and a chiller cooler; the first flow channel plate comprises a plurality of flow channels, the plurality of flow channels are arranged in the same plane, and the plurality of flow channels are used for communicating all parts of the air conditioner loop to form a circulation loop; a battery circuit; and an electric drive loop. All the flow channels of the first flow channel plate are arranged in the same plane, the multiple flow channels form the first flow channel plate of a flat structure, communication of refrigerants flowing through the multiple components in an air conditioner loop is achieved through the first flow channel plate, a complex three-dimensional pipeline is converted into a two-dimensional planar flow channel layout, and therefore the heat exchange efficiency is improved. And the space use efficiency is optimized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle thermal management, and particularly relates to a heat pump air conditioning system and a vehicle. BACKGROUND

[0002] In a conventional automobile heat pump system, a heat pump integrated module generally adopts a complex three-dimensional flow channel design. This design achieves medium transmission through a multi-layered staggered, three-dimensional layout of pipe structures. However, this three-dimensional flow channel design has obvious technical bottlenecks. On the one hand, due to its three-dimensional structure, it occupies a large amount of space, making it difficult for the heat pump integrated module to achieve a compact layout in the limited automobile cabin, greatly limiting the rational use of the automobile interior space, and the space utilization rate has been at a low level for a long time. On the other hand, the three-dimensional flow channel has a large number of bends, intersecting pipes and non-smooth transition structures, which greatly hinders the flow of medium in the pipe during operation of the heat pump system, resulting in high pipe flow resistance, and thus affecting the energy efficiency and operation stability of the heat pump system. SUMMARY

[0003] The purpose of the present application is to provide a heat pump air conditioning system and a vehicle to solve the problems of large space occupation, poor energy efficiency and operation stability of the heat pump integrated module, improve the integration degree of the heat pump integrated module, and improve the space utilization rate of the vehicle.

[0004] In a first aspect, the present application provides a heat pump air conditioning system, comprising: an air conditioning circuit, the air conditioning circuit comprising a gas-liquid separator, a compressor, an indoor condenser, an outdoor heat exchanger, an indoor evaporator and a chiller cooler, the chiller cooler comprising a first inlet and a first outlet, an outlet end of the compressor being in communication with an inlet end of the indoor condenser, an outlet end of the indoor condenser being in communication with an inlet end of the outdoor heat exchanger and an inlet end of the indoor evaporator respectively, an outlet end of the outdoor heat exchanger being in communication with an inlet end of the indoor evaporator, the first inlet of the chiller cooler and an inlet end of the gas-liquid separator respectively, an outlet end of the indoor evaporator and the first outlet of the chiller cooler being in communication with the inlet end of the gas-liquid separator, and an outlet end of the gas-liquid separator being in communication with an inlet end of the compressor; a first flow channel plate, the first flow channel plate being provided with a plurality of flow channels, the plurality of flow channels being arranged in the same plane, and the plurality of flow channels being used to communicate each part of the air conditioning circuit to form a circulation loop; A battery circuit comprising a first water pump, a battery pack, an eight-way valve, a water PTC and the chiller cooler connected in sequence, the chiller cooler further comprising a second inlet and a second outlet, the second outlet of the chiller cooler being connected to the inlet end of the water PTC, the outlet end of the water PTC being connected to the inlet end of the battery pack; An electric drive circuit comprising a second water pump, a charging and power supply module, an electric control module, an electric drive module, a low-temperature radiator and the eight-way valve connected in sequence.

[0005] The heat pump air conditioning system as described above, wherein preferably, the first flow channel plate comprises a first flow channel, a second flow channel, a third flow channel, a fourth flow channel, a fifth flow channel, a sixth flow channel, a seventh flow channel, an eighth flow channel, a ninth flow channel and a tenth flow channel, and the first flow channel to the tenth flow channel are arranged in the same plane.

[0006] The heat pump air conditioning system as described above, wherein preferably, a first electronic expansion valve is arranged on the communication pipeline between the indoor condenser and the outdoor heat exchanger, one end of the first flow channel is connected to the outlet end of the indoor condenser, the other end of the first flow channel is connected to the inlet end of the first electronic expansion valve, the outlet end of the first electronic expansion valve is connected to one end of the second flow channel, and the other end of the second flow channel is connected to the inlet end of the outdoor heat exchanger.

[0007] The heat pump air conditioning system as described above, wherein preferably, a one-way valve and a second electronic expansion valve are arranged on the communication pipeline between the outdoor heat exchanger and the indoor evaporator in sequence, the outlet end of the outdoor heat exchanger is connected to one end of the third flow channel, the other end of the third flow channel is connected to the inlet end of the one-way valve, the outlet end of the one-way valve is connected to one end of the fourth flow channel, the other end of the fourth flow channel is connected to the inlet end of the second electronic expansion valve, the outlet end of the second electronic expansion valve is connected to one end of the fifth flow channel, and the other end of the fifth flow channel is connected to the inlet end of the indoor evaporator.

[0008] The heat pump air conditioning system as described above, wherein preferably, the one-way valve and a third electronic expansion valve are arranged on the communication pipeline between the outdoor heat exchanger and the chiller cooler in sequence, the outlet end of the one-way valve is connected to one end of the seventh flow channel, the other end of the seventh flow channel is connected to the inlet end of the third electronic expansion valve, the outlet end of the third electronic expansion valve is connected to one end of the eighth flow channel, the other end of the eighth flow channel is connected to the first inlet of the chiller cooler, the first outlet of the chiller cooler is connected to one end of the ninth flow channel, and the other end of the ninth flow channel is connected to the inlet end of the gas-liquid separator.

[0009] The heat pump air conditioning system as claimed in any one of the preceding claims, wherein the outlet end of the indoor evaporator is in communication with one end of the sixth flow channel, and the other end of the sixth flow channel is in communication with the inlet end of the gas-liquid separator.

[0010] The heat pump air conditioning system as claimed in any one of the preceding claims, wherein a dehumidification valve is arranged on the communication pipeline between the indoor condenser and the indoor evaporator, the inlet end of the dehumidification valve is in communication with the first flow channel, and the outlet end of the dehumidification valve is in communication with the fourth flow channel and the seventh flow channel, respectively.

[0011] The heat pump air conditioning system as claimed in any one of the preceding claims, wherein a heating valve is arranged on the communication pipeline between the outdoor heat exchanger and the gas-liquid separator, the inlet end of the heating valve is in communication with the third flow channel, the outlet end of the heating valve is in communication with one end of the tenth flow channel, and the other end of the tenth flow channel is in communication with the inlet end of the gas-liquid separator.

[0012] The heat pump air conditioning system as claimed in any one of the preceding claims, wherein the heat pump air conditioning system further comprises an integrated valve island, and the first water pump, the second water pump, the eight-way valve, the one-way valve, the heating valve, the dehumidification valve, the first electronic expansion valve, the second electronic expansion valve, and the third electronic expansion valve are integrated on the integrated valve island.

[0013] In a second aspect, the present application provides a vehicle comprising the heat pump air conditioning system as described above.

[0014] Compared with the prior art, all the flow channels on the first flow channel plate of the present application are arranged in the same plane, the plurality of flow channels form a flat first flow channel plate, the communication of the refrigerant flowing between the plurality of components in the air conditioning circuit is realized through the first flow channel plate, the complex three-dimensional pipeline is converted into a two-dimensional planar flow channel layout, and the space utilization efficiency is optimized. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 is a structural schematic diagram of a heat pump air conditioning system provided by an embodiment of the present application; Figure 2 FIG. 2 is a perspective view of an integrated valve island provided by an embodiment of the present application; Figure 3 FIG. 3 is a front view of the integrated valve island provided by an embodiment of the present application; Figure 4 FIG. 4 is a rear view of the integrated valve island provided by an embodiment of the present application; Figure 5 FIG. 5 is a side view of the integrated valve island provided by an embodiment of the present application; Figure 6is a flow schematic diagram of refrigerant in the first flow channel plate in operation mode 1 provided by the embodiment of the present application; Figure 7 is a flow schematic diagram of refrigerant in the first flow channel plate in operation mode 2 provided by the embodiment of the present application; Figure 8 is a flow schematic diagram of refrigerant in the first flow channel plate in operation mode 3 provided by the embodiment of the present application; Figure 9 is a flow schematic diagram of refrigerant in the first flow channel plate in operation mode 4 provided by the embodiment of the present application; Figure 10 is a flow schematic diagram of refrigerant in the first flow channel plate in operation mode 5 provided by the embodiment of the present application; Figure 11 is a flow schematic diagram of refrigerant in the first flow channel plate in operation mode 6 provided by the embodiment of the present application; Figure 12 is a flow schematic diagram of refrigerant in the first flow channel plate in operation mode 7 provided by the embodiment of the present application; Figure 13 is a flow schematic diagram of refrigerant in the first flow channel plate in operation mode 8 provided by the embodiment of the present application.

[0016] BRIEF DESCRIPTION OF DRAWINGS: 100-air conditioning circuit, 200-battery circuit, 300-electric drive circuit; 1-gas-liquid separator, 2-compressor, 3-indoor condenser, 4-outdoor heat exchanger, 41-inlet end of outdoor heat exchanger, 42-outlet end of outdoor heat exchanger, 5-indoor evaporator, 51-inlet end of indoor evaporator, 52-outlet end of indoor evaporator, 6-chiller cooler, 61-first inlet of chiller cooler, 62-first outlet of chiller cooler, 63-second inlet of chiller cooler, 64-second outlet of chiller cooler; 7-first flow channel plate, 71-first flow channel, 72-second flow channel, 73-third flow channel, 74-fourth flow channel, 75-fifth flow channel, 76-sixth flow channel, 77-seventh flow channel, 78-eighth flow channel, 79-ninth flow channel, 710-tenth flow channel; 8-first electronic expansion valve, 9-one-way valve, 10-second electronic expansion valve, 11-third electronic expansion valve, 12-dehumidification valve, 13-heating valve; 14-first water pump, 15-battery pack, 16-eight-way valve, 17-water PTC, 18-second water pump, 19-charging and matching power module, 20-electronic control module, 21-electric drive module, 22-low-temperature radiator; 23-second flow channel plate; 24 - drive backplate; PT1 - first pressure temperature sensor, PT2 - second pressure temperature sensor, PT3 - third pressure temperature sensor; T1 - first temperature sensor, T2 - second temperature sensor, T3 - third temperature sensor, T4 - fourth temperature sensor; P1 - first pressure sensor, P2 - second pressure sensor. DETAILED DESCRIPTION

[0017] The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application only, and cannot be interpreted as a limitation on the present application.

[0018] In a first aspect, with reference to Figures 1 to 5 As shown in the drawings, the present application provides a heat pump air conditioning system, comprising an air conditioning circuit 100 and a first flow channel plate 7, wherein: The air conditioning circuit 100 comprises a gas-liquid separator 1, a compressor 2, an indoor condenser 3, an outdoor heat exchanger 4, an indoor evaporator 5 and a chiller cooler 6, the chiller cooler 6 comprising a first inlet and a first outlet, the outlet end of the compressor 2 being in communication with the inlet end of the indoor condenser 3, the outlet end of the indoor condenser 3 being in communication with the inlet end 41 of the outdoor heat exchanger and the inlet end 51 of the indoor evaporator respectively, the outlet end 42 of the outdoor heat exchanger being in communication with the inlet end 51 of the indoor evaporator, the first inlet 61 of the chiller cooler and the inlet end of the gas-liquid separator 1 respectively, the outlet end 52 of the indoor evaporator and the first outlet 62 of the chiller cooler being in communication with the inlet end of the gas-liquid separator 1, and the outlet end of the gas-liquid separator 1 being in communication with the inlet end of the compressor 2.

[0019] The first flow channel plate 7 is provided with a plurality of flow channels, the plurality of flow channels are arranged in the same plane, and the plurality of flow channels are used to communicate each part of the air conditioning circuit 100 to form a circulation loop. Specifically, with reference to Figure 3 As shown in the drawings, the first flow channel plate 7 comprises a first flow channel 71, a second flow channel 72, a third flow channel 73, a fourth flow channel 74, a fifth flow channel 75, a sixth flow channel 76, a seventh flow channel 77, an eighth flow channel 78, a ninth flow channel 79 and a tenth flow channel 710, and the first flow channel 71 to the tenth flow channel 710 are arranged in the same plane. The first flow channel plate 7 integrates a plurality of flow channels in the same plane, which can realize two-dimensional planar flow channel layout, and the planar flow channel plate has the characteristics of ultra-thin and compact, which can be installed in a way that is more in line with the structure of the car cabin, greatly improving the space utilization rate and providing more possibilities for the layout of other parts of the car and the optimization of the whole vehicle design.

[0020] Meanwhile, the planarized flow channel plate has smooth and regular flow channel paths, reduces the bends, cross-pipes and non-smooth transition structures arranged in the three-dimensional flow channel, makes the medium flow more smoothly in the pipe, can greatly reduce the flow resistance in the pipe when the heat pump air conditioning system is running, is beneficial to reduce the energy consumption, and improves the energy efficiency performance and running stability of the heat pump air conditioning system.

[0021] Referring to Figure 1 and Figure 3 In the embodiments provided in the present application, the first electronic expansion valve 8 is arranged on the communication pipeline of the indoor condenser 3 and the outdoor heat exchanger 4, one end of the first flow channel 71 is in communication with the outlet end of the indoor condenser 3, the other end of the first flow channel 71 is in communication with the inlet end of the first electronic expansion valve 8, the outlet end of the first electronic expansion valve 8 is in communication with one end of the second flow channel 72, and the other end of the second flow channel 72 is in communication with the inlet end 41 of the outdoor heat exchanger.

[0022] The one-way valve 9 and the second electronic expansion valve 10 are arranged in sequence on the communication pipeline of the outdoor heat exchanger 4 and the indoor evaporator 5, the outlet end 42 of the outdoor heat exchanger is in communication with one end of the third flow channel 73, the other end of the third flow channel 73 is in communication with the inlet end of the one-way valve 9, the outlet end of the one-way valve 9 is in communication with one end of the fourth flow channel 74, the other end of the fourth flow channel 74 is in communication with the inlet end of the second electronic expansion valve 10, the outlet end of the second electronic expansion valve 10 is in communication with one end of the fifth flow channel 75, and the other end of the fifth flow channel 75 is in communication with the inlet end 51 of the indoor evaporator.

[0023] The outlet end 52 of the indoor evaporator is in communication with one end of the sixth flow channel 76, and the other end of the sixth flow channel 76 is in communication with the inlet end of the gas-liquid separator 1.

[0024] The one-way valve 9 and the third electronic expansion valve 11 are arranged in sequence on the communication pipeline of the outdoor heat exchanger 4 and the chiller cooler 6, the outlet end of the one-way valve 9 is in communication with one end of the seventh flow channel 77, the other end of the seventh flow channel 77 is in communication with the inlet end of the third electronic expansion valve 11, the outlet end of the third electronic expansion valve 11 is in communication with one end of the eighth flow channel 78, the other end of the eighth flow channel 78 is in communication with the first inlet 61 of the chiller cooler, the first outlet 62 of the chiller cooler is in communication with one end of the ninth flow channel 79, and the other end of the ninth flow channel 79 is in communication with the sixth flow channel 76.

[0025] In a possible implementation manner, referring to Figure 1 and Figure 3As shown, the indoor condenser 3 is provided with a dehumidification valve 12 on the communication pipeline with the indoor evaporator 5. The inlet end of the dehumidification valve 12 is in communication with the first flow channel 71, and the outlet end of the dehumidification valve 12 is in communication with the fourth flow channel 74 and the seventh flow channel 77, respectively. When the passenger compartment needs to be dehumidified, the dehumidification valve 12 can be opened for dehumidification, and the second electronic expansion valve 10 can control the flow of refrigerant entering the indoor evaporator 5 to meet the dehumidification requirement.

[0026] Further, the outdoor heat exchanger 4 is provided with a heating valve 13 on the communication pipeline with the gas-liquid separator 1. The inlet end of the heating valve 13 is in communication with the third flow channel 73, and the outlet end of the heating valve 13 is in communication with one end of the tenth flow channel 710, and the other end of the tenth flow channel 710 is in communication with the inlet end of the gas-liquid separator 1. In the heating mode, the outdoor heat exchanger 4 is used as an outdoor evaporator, and the refrigerant flowing through the outdoor heat exchanger 4 enters the gas-liquid separator 1 after passing through the heating valve 13.

[0027] When the heat pump air conditioning system is in different operating modes, the communication state between the components in the air conditioning circuit 100 and the different flow channels is adjusted to realize the corresponding functions of the heat pump air conditioning system.

[0028] Reference Figure 1 As shown, the heat pump air conditioning system further includes a battery circuit 200 and an electric drive circuit 300, wherein: The battery circuit 200 includes a first water pump 14, a battery pack 15, an eight-way valve 16, a water PTC 17, and a chiller cooler 6. The chiller cooler 6 further includes a second inlet and a second outlet. The second outlet 64 of the chiller cooler is in communication with the inlet end of the water PTC 17. The outlet end of the water PTC 17 is in communication with the inlet end of the battery pack 15. The outlet end of the battery pack 15 is in communication with the inlet end of the first water pump 14. The outlet end of the first water pump 14 is in communication with the eight-way valve 16. The eight-way valve 16 is in communication with the second inlet 63 of the chiller cooler.

[0029] The electric drive circuit 300 includes a second water pump 18, a charging and power distribution module 19, an electric drive module 21, an electric control module 20, and a low-temperature radiator 22, which are sequentially connected in communication, and the eight-way valve 16.

[0030] The battery circuit 200 and the electric drive circuit 300 can be connected in series or in parallel through the eight-way valve 16, and the connection can be set according to the needs of the battery circuit 200 and the electric drive circuit 300. The outlet end of the indoor condenser 3 is provided with a first pressure temperature sensor PT1, which is used to detect the state of the high-pressure liquid refrigerant flowing out of the indoor condenser 3, judge the condensing effect, control the opening degree of the electronic expansion valve, and optimize the system supercooling degree. The outlet end 42 of the outdoor heat exchanger is provided with a second pressure temperature sensor PT2, which is used to detect the state of the refrigerant at the outlet of the outdoor heat exchanger 4 (evaporator in heating mode), judge the evaporation effect, and prevent incomplete evaporation or insufficient suction overheating. The inlet end of the gas-liquid separator 1 is provided with a third pressure temperature sensor PT3, which is used to detect the state of the refrigerant before entering the gas-liquid separator 1, judge the gas-liquid separation effect, and prevent liquid refrigerant from entering the compressor 2 to protect the safe operation of the compressor 2.

[0031] The inlet end of the battery pack 15 is provided with a first temperature sensor T1, which is used to detect the temperature of the cooling liquid entering the battery pack 15, judge whether the cooling system provides sufficient cooling capacity, and prevent the battery from overheating. The outlet end of the battery pack 15 is provided with a second temperature sensor T2, which is used to detect the temperature of the cooling liquid at the outlet of the battery pack 15, evaluate the internal temperature rise of the battery pack 15, and judge the size of the battery thermal load. The outlet end 52 of the indoor evaporator is provided with a third temperature sensor T3, which is used to detect the temperature of the refrigerant flowing out of the indoor evaporator 5, and control the opening degree of the second electronic expansion valve 10 through the monitored temperature to prevent the indoor evaporator 5 from overheating. The first outlet 62 of the chiller cooler is provided with a fourth temperature sensor T4, which is used to detect the temperature of the refrigerant after heat exchange in the chiller cooler 6, so as to accurately control the system supercooling degree.

[0032] The inlet end of the charging and power distribution module 19 is provided with a first pressure sensor P1, which is used to detect the pressure of the cooling liquid entering the charging and power distribution module 19, ensure sufficient cooling liquid flow, and prevent the power module from overheating or insufficient cooling. The outlet end of the electric drive module 21 is provided with a second pressure sensor P2, which is used to detect the pressure of the cooling liquid at the outlet of the electric drive module 21, evaluate the overall flow resistance of the cooling system, and judge whether the cooling liquid circulation is normal.

[0033] In the embodiments provided in the present application, with reference to Figures 2 to 4As shown, the heat pump air conditioning system further comprises an integrated valve island, the first water pump 14, the second water pump 18, the eight-way valve 16, the one-way valve 9, the heating valve 13, the dehumidification valve 12, the first electronic expansion valve 8, the second electronic expansion valve 10, the third electronic expansion valve 11, the first pressure temperature sensor PT1, the second pressure temperature sensor PT2, the third pressure temperature sensor PT3, the first temperature sensor T1, the second temperature sensor T2, the third temperature sensor T3, the fourth temperature sensor T4, the first pressure sensor P1 and the second pressure sensor P2 are all integrated on the integrated valve island.

[0034] The plurality of control elements and sensors in the air conditioning circuit 100, the battery circuit 200 and the electric drive circuit 300 are centrally arranged on the integrated valve island, having high integration and modularization characteristics, reducing assembly difficulty, the integrated valve island is applied to the heat pump air conditioning system, which can reduce the number of connecting pipelines in the system, save layout space and improve the simplicity of the whole vehicle.

[0035] The first flow channel plate 7 is used for communication with each component in the air conditioning circuit 100, belonging to the flow channel plate of the refrigerant side, in the embodiments provided in the present application, referring to Figure 4 and Figure 5 As shown, the heat pump air conditioning system further comprises a second flow channel plate 23, the second flow channel plate 23 is in communication with the components in the battery circuit 200 and the electric drive circuit 300, belonging to the flow channel plate of the cooling liquid side, the second flow channel plate 23 is similar in structure to the first flow channel plate 7, also belonging to the planar flow channel plate, making the flow of the cooling liquid in the battery circuit 200 and the electric drive circuit 300 more smooth, further improving the operation efficiency of the heat pump air conditioning system.

[0036] Referring to Figure 2 and Figure 4 As shown, the first water pump 14 of the battery circuit 200 and the second water pump 18 of the electric drive circuit 300 are respectively arranged on the left and right sides of the second flow channel plate 23, and the eight-way valve 16 is arranged in the middle of the second flow channel plate 23, the heat pump air conditioning system can adjust the valve core of the eight-way valve 16 according to different modes, adjust the flow channel on-off, so as to realize the series connection or parallel connection of the battery circuit 200 and the electric drive circuit 300. The first water pump 14 and the second water pump 18 are arranged separately on the two sides, which can avoid heat accumulation, have a larger air contact area, and improve the heat dissipation capacity of the system to the outside.

[0037] Referring to Figures 2 to 5 As shown, the first flow channel plate 7 is connected with each control element and sensor of the air conditioning circuit 100 on the integrated valve island, the second flow channel plate 23 is connected with each control element and sensor of the battery circuit 200 and the electric drive circuit 300 on the integrated valve island, the first flow channel plate 7 and the second flow channel plate 23 are arranged in different planes, and the two are staggered on the front and rear sides of the integrated valve island, which can reduce the heat conduction between the circuits.

[0038] Referring to Figure 2 As shown in the figure, the heat pump air conditioning system further comprises a driving backboard 24, and the driving modules of the heat pump air conditioning system are integrated on the driving backboard 24, and the integrated domain controller is based on CAN+local Ethernet, function domain controller, SOA service, information security, and is combined with the control of AGS, electronic fan, compressor 2. After the integrated collection and driving of the integrated components in the heat pump air conditioning system, the chip sharing rate can be improved, and the wire harness cost can be reduced.

[0039] Based on the above embodiment, the heat pump air conditioning system of the present application comprises the following eight operating modes: 1. Refrigeration mode (passenger compartment and battery refrigeration) Referring to Figure 6 As shown in the figure, in the refrigeration mode, the system calculates the supercooling degree according to the pressure detected by the third pressure temperature sensor PT3 and the temperature detected by the fourth temperature sensor T4, controls the opening degree of the second electronic expansion valve 10 according to the supercooling degree, and uses the outdoor heat exchanger 4 as a condenser. Part of the refrigerant flowing out of the outdoor heat exchanger 4 passes through the third flow channel 73, the one-way valve 9, the fourth flow channel 74 and the second electronic expansion valve 10 in turn, and the refrigerant after pressure reduction by the second electronic expansion valve 10 enters the indoor evaporator 5 to evaporate and exchange heat through the fifth flow channel 75. After heat exchange, the refrigerant flows through the gas-liquid separator 1 for gas-liquid separation, and the gaseous refrigerant enters the compressor 2 to become high-temperature and high-pressure gas, flows through the indoor condenser 3, and then enters the outdoor heat exchanger 4 through the first flow channel 71, the first electronic expansion valve 8 and the second flow channel 72 in turn, thereby realizing the circulation of the refrigerant of the air conditioning circuit 100. In the refrigeration mode, the dehumidification valve 12 and the heating valve 13 are closed.

[0040] The eight-way valve 16 connects 1-3 and 4-6, and the battery circuit 200 and the electric drive circuit 300 are connected in parallel. Another part of the refrigerant flowing out of the outdoor heat exchanger 4 passes through the third flow channel 73, the one-way valve 9, the seventh flow channel 77, the third electronic expansion valve 11, the eighth flow channel 78, the chiller cooler 6 and the ninth flow channel 79, and then flows back to the gas-liquid separator 1. When the cooling liquid of the battery circuit 200 flows through the chiller cooler 6, it exchanges heat with the refrigerant of the air conditioning circuit 100. The cooled cooling liquid flows to the battery pack 15 to dissipate heat for the battery under the action of the first water pump 14; the electric drive circuit 300 dissipates heat for the charging and power distribution module 19, the electric drive module 21 and the electronic control module 20 through the low-temperature radiator 22.

[0041] 2. Passenger compartment refrigeration + battery LTR heat dissipation Referring to Figure 7 As shown in the figure, the refrigeration of the passenger compartment is the same as the refrigeration mode 1, but the chiller cooler 6 is closed.

[0042] The eight-way valve 16 connects 3-4 and 1-6, the chiller cooler 6 is closed, there is no heat exchange between the battery circuit 200 and the air conditioning circuit 100, the first water pump 14 and the second water pump 18 are driven in series, and the low-temperature radiator 22 simultaneously dissipates heat for the battery pack 15, the charging and power distribution module 19, the electric drive module 21 and the electric control module 20.

[0043] 3. Passenger cabin refrigeration and dehumidification + battery LTR heat dissipation Referring to Figure 8 As shown, part of the refrigerant flowing out of the outdoor heat exchanger 4 passes through the third flow channel 73, the one-way valve 9, the fourth flow channel 74 and the second electronic expansion valve 10 in sequence, the refrigerant after pressure reduction by the second electronic expansion valve 10 enters the indoor evaporator 5 through the fifth flow channel 75 to exchange heat, and the refrigerant after heat exchange flows through the gas-liquid separator 1 for gas-liquid separation, and the gaseous refrigerant enters the compressor 2 to become high-temperature and high-pressure gas, flows through the indoor condenser 3, and then enters the outdoor heat exchanger 4 through the first flow channel 71, the first electronic expansion valve 8 and the second flow channel 72 in sequence, thereby realizing the circulation of the refrigerant of the air conditioning circuit 100. The indoor condenser 3 and the indoor evaporator 5 jointly constitute a dehumidification device, the outdoor heat exchanger 4 functions as a condenser to release heat to the outside, and the dehumidification valve 12 and the heating valve 13 are closed.

[0044] The eight-way valve 16 connects 3-4 and 1-6, the chiller cooler 6 is closed, the first water pump 14 and the second water pump 18 are driven in series, and the low-temperature radiator 22 simultaneously dissipates heat for the battery pack 15, the charging and power distribution module 19, the electric drive module 21 and the electric control module 20.

[0045] 4. Passenger cabin heating and dehumidification + battery LTR heat dissipation Referring to Figure 9 As shown, in the heating mode, the outdoor heat exchanger 4 functions as an evaporator to absorb heat from the outside, part of the refrigerant flowing out of the indoor condenser 3 passes through the first flow channel 71, the first electronic expansion valve 8 and the second flow channel 72 in sequence to enter the outdoor heat exchanger 4, the refrigerant flowing out of the outdoor heat exchanger 4 is divided into two paths through the third flow channel 73, one path passes through the fourth flow channel 74, the indoor evaporator 5 and the sixth flow channel 76 in sequence to flow back to the gas-liquid separator 1, and the other path passes through the third flow channel 73, the heating valve 13 and the tenth flow channel 710 to flow to the gas-liquid separator 1, thereby realizing the heating circulation of the air conditioning circuit 100. The indoor condenser 3 and the indoor evaporator 5 jointly constitute a dehumidification device to reduce air humidity while heating to increase the temperature of the passenger cabin.

[0046] The eight-way valve 16 connects 3-4 and 1-6, the chiller cooler 6 is closed, the first water pump 14 and the second water pump 18 are driven in series, and the low-temperature radiator 22 simultaneously dissipates heat for the battery pack 15, the charging and power distribution module 19, the electric drive module 21 and the electric control module 20.

[0047] 5. Passenger cabin heating and dehumidification (chiller) Referring to Figure 10 As shown, in the passenger cabin chiller mode, heating is performed by the indoor condenser 3, the indoor condenser 3 and the indoor evaporator 5 together constitute a dehumidification device, the first electronic expansion valve 8 is closed, the outdoor heat exchanger 4 does not work, the dehumidification valve 12 is opened, and the heating valve 13 is closed. The refrigerant flowing out of the indoor condenser 3 flows through the first flow channel 71, the dehumidification valve 12, the fourth flow channel 74, the second electronic expansion valve 10 and the fifth flow channel 75 in turn, and then enters the indoor evaporator 5, and then flows back to the gas-liquid separator 1 through the sixth flow channel 76.

[0048] The eight-way valve 16 connects 2-4, 1-5, the battery circuit 200 and the electric drive circuit 300 are connected in series, at this time the low-temperature radiator 22 does not work, only the second water pump 18 is driven, and the heat generated by the charging and power distribution module 19, the electric drive module 21 and the electric control module 20 is used to heat the components of the battery circuit 200.

[0049] 6. Passenger cabin heating Referring to Figure 11 As shown, in the passenger cabin heating mode, heating is performed by the indoor condenser 3, the indoor evaporator 5 does not work, the outdoor heat exchanger 4 works as an evaporator to absorb heat, the dehumidification valve 12 and the heating valve 13 are opened, and the refrigerant flowing out of the indoor condenser 3 is divided into two parts. One part of the refrigerant flows through the first flow channel 71, the first electronic expansion valve 8, the outdoor heat exchanger 4, the third flow channel 73, the heating valve 13 and the tenth flow channel 710, and then flows to the gas-liquid separator 1; the other part of the refrigerant flows through the first flow channel 71, the dehumidification valve 12, the seventh flow channel 77, the third electronic expansion valve 11, the eighth flow channel 78, the chiller cooler 6, and then flows to the gas-liquid separator 1 through the ninth flow channel 79, and the two paths of refrigerant are combined before flowing back to the gas-liquid separator 1, completing a cycle. The refrigerant flowing through the chiller cooler 6 exchanges heat with the battery circuit 200 to heat the low-temperature battery circuit 200.

[0050] The eight-way valve 16 connects 2-4, 1-5, the battery circuit 200 and the electric drive circuit 300 are connected in series, at this time the low-temperature radiator 22 does not work, only the second water pump 18 is driven, and the heat generated by the charging and power distribution module 19, the electric drive module 21 and the electric control module 20 is used to heat the components of the battery circuit 200.

[0051] 7. Passenger cabin heating + battery heating Referring to Figure 12 As shown, the passenger cabin heating is performed by the indoor condenser 3, the indoor evaporator 5 does not work, the dehumidification valve 12 is closed, and the refrigerant flowing through the indoor condenser 3 enters the outdoor heat exchanger 4 through the first flow channel 71, the first electronic expansion valve 8 and the second flow channel 72, and then the refrigerant flowing out of the outdoor heat exchanger 4 flows back to the gas-liquid separator 1 through the third flow channel 73, the heating valve 13 and the tenth flow channel 710, completing a cycle.

[0052] Eight-way valve 16 connects 3-4, 1-5, battery circuit 200 and electric drive circuit 300 are connected in series, driven by first water pump 14 and second water pump 18, low-temperature radiator 22 does not act, heated by water PTC 17 and heat generated by charging and power distribution module 19, electric drive module 21 and electric control module 20 to heat the components of battery circuit 200.

[0053] 8. Defrosting mode Referring to Figure 13 As shown, the passenger compartment is not heat exchanged, the indoor condenser 3 and the indoor evaporator 5 do not act, the refrigerant flows out of the compressor 2 outlet and directly enters the outdoor heat exchanger 4 by the first flow channel 71, the first electronic expansion valve 8 and the second flow channel 72 to defrost the air side of the outdoor heat exchanger 4, the heating valve 13 and the dehumidification valve 12 are closed, and the refrigerant flows out of the outdoor heat exchanger 4 and then flows through the third flow channel 73, the one-way valve 9, the seventh flow channel 77, the eighth flow channel 78, the first inlet 61 of the chiller cooler, the first outlet 62 of the chiller cooler and the ninth flow channel 79 before flowing into the gas-liquid separator 1, completing the cycle.

[0054] Eight-way valve 16 connects 2-4, 1-5, battery circuit 200 and electric drive circuit 300 are connected in series, driven by second water pump 18 only, low-temperature radiator 22 does not act, heated by charging and power distribution module 19, electric drive module 21 and electric control module 20 to heat the components of battery circuit 200.

[0055] In a second aspect, the present application provides a vehicle comprising the aforementioned heat pump air conditioning system. The heat pump air conditioning system uses the first flow channel plate 7 to realize the flow of refrigerant of the air conditioning circuit 100, and uses the second flow channel plate 23 to realize the flow of cooling liquid of the battery circuit 200 and the electric drive circuit 300. Since the first flow channel plate 7 and the second flow channel plate 23 are both planar flow channel plates, and the multiple sensors and control valve pieces of the heat pump air conditioning system are integrated on the integrated valve island, the heat pump air conditioning system can reasonably utilize the space inside the vehicle for layout, improving the space utilization rate. In addition, the arrangement of the first flow channel plate 7 and the second flow channel plate 23 can reduce the flow resistance in each pipeline of the heat pump air conditioning system, has good energy efficiency performance and running stability, and is thus conducive to improving the performance of the vehicle.

[0056] The above describes the structure, features and effects of the present application in detail according to the embodiments shown in the drawings. The above description is only a preferred embodiment of the present application, but the present application is not limited to the embodiments shown in the drawings. Any changes or modifications made in accordance with the concept of the present application, or equivalent embodiments with equivalent changes, are still within the scope of the present application.

Claims

1. A heat pump air conditioning system, characterised in that, The air conditioning circuit comprises a gas-liquid separator, a compressor, an indoor condenser, an outdoor heat exchanger, an indoor evaporator and a chiller cooler, the chiller cooler comprises a first inlet and a first outlet, the outlet end of the compressor is communicated with the inlet end of the indoor condenser, the outlet end of the indoor condenser is respectively communicated with the inlet end of the outdoor heat exchanger and the inlet end of the indoor evaporator, the outlet end of the outdoor heat exchanger is respectively communicated with the inlet end of the indoor evaporator, the first inlet of the chiller cooler and the inlet end of the gas-liquid separator, the outlet end of the indoor evaporator and the first outlet of the chiller cooler are both communicated with the inlet end of the gas-liquid separator, and the outlet end of the gas-liquid separator is communicated with the inlet end of the compressor. A first flow channel plate is provided with a plurality of flow channels, and the plurality of flow channels are arranged in the same plane and used to communicate each part of the air conditioning circuit to form a circulation loop. The battery circuit comprises a first water pump, a battery pack, an eight-way valve, a water PTC and the chiller cooler which are sequentially communicated, the chiller cooler further comprises a second inlet and a second outlet, the second outlet of the chiller cooler is communicated with the inlet end of the water PTC, and the outlet end of the water PTC is communicated with the inlet end of the battery pack. The electric drive circuit comprises a second water pump, a charging and power supply module, an electric control module, an electric drive module, a low-temperature radiator and the eight-way valve which are sequentially communicated. The first flow channel plate comprises a first flow channel, a second flow channel, a third flow channel, a fourth flow channel, a fifth flow channel, a sixth flow channel, a seventh flow channel, an eighth flow channel, a ninth flow channel and a tenth flow channel, and the first flow channel to the tenth flow channel are arranged in the same plane.

2. The heat pump air conditioning system of claim 1, wherein, A first electronic expansion valve is arranged on the communication pipeline between the indoor condenser and the outdoor heat exchanger, one end of the first flow channel is communicated with the outlet end of the indoor condenser, the other end of the first flow channel is communicated with the inlet end of the first electronic expansion valve, the outlet end of the first electronic expansion valve is communicated with one end of the second flow channel, and the other end of the second flow channel is communicated with the inlet end of the outdoor heat exchanger.

3. The heat pump air conditioning system of claim 2, wherein, A one-way valve and a second electronic expansion valve are sequentially arranged on the communication pipeline between the outdoor heat exchanger and the indoor evaporator, the outlet end of the outdoor heat exchanger is communicated with one end of the third flow channel, the other end of the third flow channel is communicated with the inlet end of the one-way valve, the outlet end of the one-way valve is communicated with one end of the fourth flow channel, the other end of the fourth flow channel is communicated with the inlet end of the second electronic expansion valve, the outlet end of the second electronic expansion valve is communicated with one end of the fifth flow channel, and the other end of the fifth flow channel is communicated with the inlet end of the indoor evaporator.

4. The heat pump air conditioning system of claim 3, wherein, ​ 5. The heat pump air conditioning system of claim 4, wherein, The outdoor heat exchanger is sequentially provided with the one-way valve and the third electronic expansion valve on the communication pipeline of the chiller cooler, the outlet end of the one-way valve is communicated with one end of the seventh flow channel, the other end of the seventh flow channel is communicated with the inlet end of the third electronic expansion valve, the outlet end of the third electronic expansion valve is communicated with one end of the eighth flow channel, the other end of the eighth flow channel is communicated with the first inlet of the chiller cooler, the first outlet of the chiller cooler is communicated with one end of the ninth flow channel, and the other end of the ninth flow channel is communicated with the inlet end of the gas-liquid separator.

6. The heat pump air conditioning system of claim 5, wherein, The outlet end of the indoor evaporator is communicated with one end of the sixth flow channel, and the other end of the sixth flow channel is communicated with the inlet end of the gas-liquid separator.

7. The heat pump air conditioning system according to claim 6, wherein The indoor condenser is provided with a dehumidification valve on the communication pipeline of the indoor evaporator, the inlet end of the dehumidification valve is communicated with the first flow channel, and the outlet end of the dehumidification valve is respectively communicated with the fourth flow channel and the seventh flow channel.

8. The heat pump air conditioning system according to claim 7, wherein, The outdoor heat exchanger is provided with a heating valve on the communication pipeline of the gas-liquid separator, the inlet end of the heating valve is communicated with the third flow channel, the outlet end of the heating valve is communicated with one end of the tenth flow channel, and the other end of the tenth flow channel is communicated with the inlet end of the gas-liquid separator.

9. The heat pump air conditioning system of claim 8, wherein, The heat pump air conditioning system further comprises an integrated valve island, and the first water pump, the second water pump, the eight-way valve, the one-way valve, the heating valve, the dehumidification valve, the first electronic expansion valve, the second electronic expansion valve and the third electronic expansion valve are integrated on the integrated valve island.

10. A vehicle characterized by comprising: The heat pump air conditioning system comprises any one of claims 1 to 9. The heat pump air conditioning system comprises any one of claims 1 to 9.

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