CN220517929U - Refrigerating circuit of air conditioning system of electric automobile - Google Patents
Refrigerating circuit of air conditioning system of electric automobile Download PDFInfo
- Publication number
- CN220517929U CN220517929U CN202322118345.4U CN202322118345U CN220517929U CN 220517929 U CN220517929 U CN 220517929U CN 202322118345 U CN202322118345 U CN 202322118345U CN 220517929 U CN220517929 U CN 220517929U
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- interface
- tee joint
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- pipe part
- air conditioning
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 34
- 239000003507 refrigerant Substances 0.000 claims abstract description 44
- 230000005484 gravity Effects 0.000 claims abstract description 22
- 238000005057 refrigeration Methods 0.000 claims description 41
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Air-Conditioning For Vehicles (AREA)
Abstract
The utility model provides an electric automobile air conditioning system refrigerating circuit, includes passenger cabin refrigerating circuit and power battery refrigerating circuit, passenger cabin refrigerating circuit includes the evaporimeter, power battery refrigerating circuit includes battery heat exchanger, electric automobile air conditioning system refrigerating circuit still includes evaporimeter export pipeline, battery heat exchanger export pipeline and tee bend device, evaporimeter export pipeline battery heat exchanger export pipeline with the compressor return air pipeline respectively with tee bend device intercommunication, tee bend device set up in the direction of height in the evaporimeter export pipeline battery heat exchanger export pipeline's below, the evaporimeter export pipeline with refrigerant in the battery heat exchanger export pipeline can enter under the action of gravity in the tee bend device.
Description
Technical Field
The utility model relates to the technical field of electric automobile air conditioning systems, in particular to a refrigerating circuit of an electric automobile air conditioning system.
Background
An air conditioning system (hereinafter referred to as a system) of an electric automobile generally comprises two refrigeration loops, namely a passenger cabin refrigeration loop and a power battery refrigeration loop, wherein an electric compressor and refrigerating oil of the electric compressor in the system are important parts of the system operation, and the electric compressor and the refrigerating oil participate in the operation of the passenger cabin refrigeration loop and the power battery refrigeration loop.
The electric compressor refrigerating oil has the functions of lubrication, sealing and cooling, and flows in different refrigerating circuits according to different working conditions, and in the running process of the system, one part of refrigerating oil can return to the electric compressor, and the other part of refrigerating oil can remain in the refrigerating circuit of the system. Based on the trend arrangement of the air conditioner pipelines, under the working condition that the passenger cabin refrigeration circuit or the power battery refrigeration circuit operates independently, the refrigerating oil is likely to not smoothly return to the electric compressor, but is retained in the refrigeration circuit, and excessive residues in the refrigeration circuit of the system can influence the operation effect of the air conditioner and the service life of the electric compressor.
Disclosure of Invention
The utility model provides an electric automobile air conditioning system refrigerating circuit capable of enabling a refrigerant to naturally flow back to an electric compressor under the action of gravity, comprising a passenger cabin refrigerating circuit and a power battery refrigerating circuit, wherein the passenger cabin refrigerating circuit comprises an evaporator, the power battery refrigerating circuit comprises a battery heat exchanger, the electric automobile air conditioning system refrigerating circuit further comprises an evaporator outlet pipeline, a battery heat exchanger outlet pipeline and a tee joint device, the evaporator outlet pipeline, the battery heat exchanger outlet pipeline and a compressor return air pipeline are respectively communicated with the tee joint device, the tee joint device is arranged below the evaporator outlet pipeline and the battery heat exchanger outlet pipeline in the height direction, and the refrigerant in the evaporator outlet pipeline and the battery heat exchanger outlet pipeline can enter the tee joint device under the action of gravity.
Further, the compressor return air pipeline is arranged below the three-way device in the height direction, and the refrigerant in the three-way device can enter the compressor return air pipeline under the action of gravity.
Further, the evaporator outlet pipeline comprises a first interface, a second interface and a first pipe part, wherein the first interface is communicated with the evaporator in the air conditioning cabinet, the second interface is communicated with the tee joint device, the first pipe part is communicated with the first interface and the second interface, the first pipe part is used for accommodating the refrigerant flowing from the first interface to the second interface, and the height of the first pipe part is gradually reduced from the joint of the first pipe part and the first interface to the joint of the first pipe part and the second interface.
Further, the battery heat exchanger outlet pipeline comprises a third interface, a fourth interface and a second pipe part, wherein the third interface is communicated with the battery heat exchanger, the fourth interface is communicated with the tee joint device, the second pipe part is used for being communicated with the third interface and the fourth interface, the second pipe part is used for containing and flowing to the fourth interface through the third interface, and the height of the second pipe part is gradually reduced from the joint of the second pipe part and the third interface to the joint of the second pipe part and the fourth interface.
Further, the compressor return air pipeline comprises a fifth interface, a sixth interface and a third pipe part, wherein the fifth interface is communicated with the three-way device, the sixth interface is communicated with the electric compressor, the third pipe part is used for containing and flowing the refrigerant flowing to the sixth interface from the fifth interface, and the height of the third pipe part is gradually reduced from the joint of the third pipe part and the fifth interface to the joint of the third pipe part and the sixth interface.
Further, the tee device comprises a first tee interface, a second tee interface and a third tee interface which are communicated with each other, the first tee interface is communicated with the second interface, the second tee interface is communicated with the fourth interface, the third tee interface is communicated with the fifth interface, the tee device is used for accommodating and passing the refrigerant flowing from the first tee interface and/or the second tee interface to the third tee interface, and the first tee interface and the second tee interface are higher than the third tee interface in the height direction.
Further, the third tee joint is arranged below a connecting line of the first tee joint and the second tee joint in the height direction.
Further, the tee joint device further comprises a straight pipe portion and a branch pipe portion which are integrally formed, the first tee joint connector and the third tee joint connector are respectively arranged on the two opposite end portions of the straight pipe portion, the second tee joint connector is arranged on one end portion of the branch pipe portion, the other end portion of the branch pipe portion is communicated with the middle portion of the straight pipe portion, and the straight pipe portion is connected with one section of the first tee joint connector and the branch pipe portion to form an included angle smaller than 180 degrees.
Further, the end portion of the branch pipe portion, which communicates with the straight pipe portion, is disposed below a connection line of the first three-way joint and the second three-way joint in the height direction.
Further, the straight pipe portion and the branch pipe portion are arranged in the vertical direction.
According to the refrigerating circuit of the air conditioning system of the electric automobile, provided by the utility model, through designing the outlet pipelines of the refrigerating circuit of the passenger cabin and the refrigerating circuit of the power battery, the refrigerant of the electric compressor can naturally flow back to the electric compressor under the action of gravity under the refrigerating working condition of the passenger cabin and the refrigerating working condition of the power battery, so that the problem of retention in the refrigerant circuit is avoided. The reasonable oil return design of the refrigerating circuit of the air conditioning system of the electric automobile reduces the abrasion of the electric compressor and improves the service life and the system performance of the electric compressor.
Drawings
Fig. 1 is a schematic diagram of a refrigeration circuit of an air conditioning system of an electric vehicle.
Fig. 2 is a schematic view of a three-way device according to the present utility model.
Detailed Description
In order to further describe the technical means and effects adopted by the present utility model to achieve the preset purpose, the following detailed description of the present utility model is given with reference to the accompanying drawings and preferred embodiments.
The terms first, second, third, fourth and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Referring to fig. 1, the electric vehicle air conditioning system refrigeration circuit of the present utility model is suitable for an electric vehicle, and the electric vehicle air conditioning system of the present utility model includes a passenger cabin refrigeration circuit and a power battery refrigeration circuit, wherein the passenger cabin refrigeration circuit at least includes an electric compressor, a condenser, an air conditioning pipeline, an evaporator and an expansion valve, the power battery refrigeration circuit at least includes an electric compressor, a condenser, an air conditioning pipeline and a battery heat exchanger, and the electric compressor participates in the operation of the passenger cabin refrigeration circuit and/or the power battery refrigeration circuit. The refrigerating loop of the air conditioning system of the electric automobile comprises an evaporator outlet pipeline 1, a battery heat exchanger outlet pipeline 2 and a three-way device 3, wherein the evaporator outlet pipeline 1, the battery heat exchanger outlet pipeline 2 and a compressor return air pipeline 4 are respectively communicated with the three-way device 3, the three-way device 3 is arranged below the evaporator outlet pipeline 1 and the battery heat exchanger outlet pipeline 2 in the height direction, and the refrigerant in the evaporator outlet pipeline 1 and the battery heat exchanger outlet pipeline 2 can enter the three-way device 3 under the action of gravity. Specifically, in this embodiment, the refrigerant is a mixture of refrigerating oil and refrigerant of the electric compressor, and when the system is operated independently for the passenger cabin refrigeration circuit, that is, the passenger cabin refrigeration working condition, the refrigerant flows in the passenger cabin refrigeration circuit, and flows into the electric compressor through the evaporator outlet pipeline 1 and the three-way device 3 in sequence; when the system is operated independently for the power battery refrigerating loop, namely under the power battery refrigerating working condition, the refrigerant flows in the power battery refrigerating loop and flows into the electric compressor through the battery heat exchanger outlet pipeline 2 and the three-way device 3 in sequence; when the system is operated simultaneously for the passenger cabin refrigeration circuit and the power battery refrigeration circuit, the refrigerant flows in the passenger cabin refrigeration circuit and the power battery refrigeration circuit and flows into the electric compressor through the three-way device 3 by being summarized to the evaporator outlet pipeline 1 and the battery heat exchanger outlet pipeline 2 respectively.
Further, the evaporator outlet pipeline 1 comprises a first connector 11, a second connector 12 and a first pipe part 13, the first connector 11 is communicated with the evaporator in the air conditioning cabinet, the second connector 12 is communicated with the three-way device 3, the first pipe part 13 is communicated with the first connector 11 and the second connector 12, the first pipe part 13 is used for containing the refrigerant flowing from the first connector 11 to the second connector 12, and the height of the first pipe part 13 is gradually reduced from the connection part of the first pipe part and the first connector 11 to the connection part of the first pipe part and the second connector 12. Specifically, in the present embodiment, the first port 11 is disposed above the second port 12 in the height direction and is higher than the junction between the first port 11 and the first pipe portion 13, and as will be understood, the refrigerant entering the first port 11 flows to the second port 12 through the first pipe portion 13 under the action of gravity, and the downstream pipes are not higher than the first pipe portion 13 of the upstream pipe, so that the refrigerant can flow from the first port 11 to the second port 12 under the action of gravity without being retained in the first pipe portion 13, thereby avoiding the refrigerant remaining in the evaporator outlet pipe 1.
Similarly, the battery heat exchanger outlet line 2 comprises a third port 21, a fourth port 22 and a second pipe portion 23, the third port 21 is communicated with the battery heat exchanger, the fourth port 22 is communicated with the three-way device 3, the second pipe portion 23 is used for communicating the third port 21 and the fourth port 22, the second pipe portion 23 is used for containing and passing the refrigerant flowing from the third port 21 to the fourth port 22, and the height of the second pipe portion 23 is gradually reduced from the connection position of the second pipe portion and the third port 21 to the connection position of the second pipe portion and the fourth port 22. Specifically, in the present embodiment, the third port 21 is disposed above the fourth port 22 in the height direction and higher than the junction between the third port 21 and the second pipe portion 23, and as will be understood, the refrigerant entering the third port 21 flows to the fourth port 22 through the second pipe portion 23 under the action of gravity, and the downstream pipes are not higher than the second pipe portion 23 of the upstream pipe, so that the refrigerant can flow from the third port 21 to the fourth port 22 under the action of gravity without stagnating in the second pipe portion 23, thereby avoiding the refrigerant remaining in the battery heat exchanger outlet pipe 2.
Further, the refrigerating circuit of the air conditioning system of the electric automobile further comprises a compressor return air pipeline 4, the compressor return air pipeline 4 is arranged below the three-way device 3 in the height direction, and the refrigerant in the three-way device 3 can enter the compressor return air pipeline 4 under the action of gravity. Specifically, in the present embodiment, the compressor return line 4 includes the fifth port 41, the sixth port 42 and the third pipe portion 43, the fifth port 41 communicates with the three-way device 3, the sixth port 42 communicates with the electric compressor, the third pipe portion 43 is for accommodating and passing the refrigerant flowing from the fifth port 41 to the sixth port 42, the height of the third pipe portion 43 is gradually reduced from the connection thereof with the fifth port 41 to the connection thereof with the sixth port 42, the fifth port 41 is disposed above the sixth port 42 in the height direction and higher than the connection of the fifth port 41 with the third pipe portion 43, it is easy to understand that the refrigerant entering the fifth port 41 flows to the sixth port 42 via the third pipe portion 43 under the action of gravity, none of the downstream pipes is higher than in the third pipe portion 43 of the upstream pipe line, and the refrigerant can flow from the fifth port 41 to the sixth port 42 under the action of gravity and finally enter the electric compressor.
Further, the three-way device 3 comprises a first three-way joint 31, a second three-way joint 32 and a third three-way joint 33 which are communicated with each other, the first three-way joint 31 is communicated with the second joint 12, the second three-way joint 32 is communicated with the fourth joint 22, the third three-way joint 33 is communicated with the fifth joint 41, the three-way device 3 is used for containing and passing the refrigerant flowing to the third three-way joint 33 from the first three-way joint 31 and/or the second three-way joint 32, and the first three-way joint 31 and the second three-way joint 32 are higher than the third three-way joint 33 in the height direction. Specifically, in the present embodiment, the third three-way joint 33 is disposed below the line connecting the first three-way joint 31 and the second three-way joint 32 in the height direction, and the three-way device 3 thus disposed can prevent the refrigerant entering the three-way device 3 from flowing back into the three-way device 3 through the first three-way joint 31 and/or the second three-way joint 32, that is, ensure that the refrigerant flowing into the three-way device 3 through one of the first three-way joint 31 or the second three-way joint 32 does not flow into the other one of the three-way joint 31 or the second three-way joint 32 under the action of gravity, but rather flows into the third three-way joint 33, thereby avoiding retention of the refrigerant in the three-way device 3. In the preferred embodiment of the present utility model, the first three-way connection 31 and the second three-way connection 32 may be located at the same position in the height direction, while in other embodiments, they may be set according to the actual arrangement of the passenger compartment refrigeration circuit and the power battery refrigeration circuit, at least to satisfy that both are higher than the third three-way connection 33.
Referring to fig. 2, further, the three-way device 3 further includes an integrally formed straight pipe portion 3a and a branch pipe portion 3b, the first three-way joint 31 and the third three-way joint 33 are respectively disposed on two opposite ends of the straight pipe portion 3a, one end of the branch pipe portion 3b is provided with a second three-way joint 32, and the other end of the branch pipe portion 3b is communicated with the middle of the straight pipe portion 3 a. Specifically, in the present embodiment, the end portion of the branch pipe portion 3b communicating with the straight pipe portion 3a is disposed below the line connecting the first three-way joint 31 and the second three-way joint 32 in the height direction, further ensuring that the refrigerant flowing into the three-way device 3 from one of the first three-way joint 31 or the second three-way joint 32 does not flow into the other thereof under the action of gravity, but rather flows into the third three-way joint 33. In particular, the three-way device 3 in the present utility model cannot have a vertically-arranged T-shaped structure, and an included angle smaller than 180 degrees must be formed between the straight pipe portion 3a connected with the first three-way port 31 and the branch pipe portion 3b connected with the second three-way port 32, that is, the first three-way port 31 and the third three-way port 33 cannot be hedged in a straight pipeline, so that the refrigerant is prevented from hedging in the three-way device 3 to affect the refrigerant circulation. In the preferred embodiment of the present utility model, the straight pipe portion 3a and the branch pipe portion 3b are vertically arranged, that is, the three-way device 3 is in an inclined T-shaped structure, while in other embodiments, the three-way device 3 may be arranged according to the actual arrangement of the passenger compartment refrigeration circuit and the power battery refrigeration circuit, so long as the first three-way interface 31 and the second three-way interface 32 are higher than the third three-way interface 33 in the height direction.
Specifically, when the system is operated independently for the passenger cabin refrigeration circuit, namely, the passenger cabin refrigeration working condition, the refrigerant enters the evaporator outlet pipeline 1 from the evaporator through the first connector 11, flows to the second connector 12 through the first pipe part 13 under the action of gravity, enters the three-way device 3 through the second connector 12 and the first three-way connector 31 communicated with the second connector 12, enters the compressor return air pipeline 4 through the third three-way connector 33 and the fifth connector 41 communicated with the third three-way connector 33 under the action of gravity, and finally flows into the electric compressor through the sixth connector 42.
Similarly, when the system is operated independently for the power battery refrigeration circuit, namely, the power battery refrigeration working condition, the refrigerant enters the battery heat exchanger outlet pipeline 2 from the battery heat exchanger through the third port 21, flows to the fourth port 22 through the second pipe part 23 under the action of gravity, enters the three-way device 3 through the fourth port 22 and the second three-way port 32 communicated with the fourth port 22, enters the compressor return pipeline 4 through the third three-way port 33 and the fifth port 41 communicated with the third port 33 under the action of gravity, and finally flows into the electric compressor through the sixth port 42.
In conclusion, the refrigerating circuit of the air conditioning system of the electric automobile enables the refrigerant of the electric compressor to naturally flow back to the electric compressor under the action of gravity under the refrigerating working condition of the passenger cabin and the refrigerating working condition of the power battery by designing the outlet pipelines of the refrigerating circuit of the passenger cabin and the refrigerating circuit of the power battery, so that the problem of retention in the refrigerating circuit of the refrigerant is avoided. The reasonable oil return design of the refrigerating circuit of the air conditioning system of the electric automobile reduces the abrasion of the electric compressor and improves the service life and the system performance of the electric compressor.
The foregoing is merely illustrative embodiments of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present utility model, and the utility model should be covered. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (10)
1. The utility model provides an electric automobile air conditioning system refrigerating circuit, includes passenger cabin refrigerating circuit and power battery refrigerating circuit, passenger cabin refrigerating circuit includes the evaporimeter, power battery refrigerating circuit includes battery heat exchanger, its characterized in that: the refrigerating circuit of the air conditioning system of the electric automobile further comprises an evaporator outlet pipeline (1), a battery heat exchanger outlet pipeline (2) and a three-way device (3), wherein the evaporator outlet pipeline (1), the battery heat exchanger outlet pipeline (2) and a compressor return air pipeline (4) are respectively communicated with the three-way device (3), the three-way device (3) is arranged below the evaporator outlet pipeline (1) and the battery heat exchanger outlet pipeline (2) in the height direction, and the refrigerant in the evaporator outlet pipeline (1) and the battery heat exchanger outlet pipeline (2) can enter the three-way device (3) under the action of gravity.
2. The electric vehicle air conditioning system refrigeration circuit of claim 1, wherein: the compressor return air pipeline (4) is arranged below the three-way device (3) in the height direction, and the refrigerant in the three-way device (3) can enter the compressor return air pipeline (4) under the action of gravity.
3. The electric vehicle air conditioning system refrigeration circuit of claim 2, wherein: the evaporator outlet pipeline (1) comprises a first interface (11), a second interface (12) and a first pipe part (13), wherein the first interface (11) is communicated with an evaporator in an air conditioning cabinet, the second interface (12) is communicated with the tee joint device (3), the first pipe part (13) is communicated with the first interface (11) and the second interface (12), the first pipe part (13) is used for accommodating refrigerant flowing from the first interface (11) to the second interface (12), and the height of the first pipe part (13) is gradually reduced from the joint of the first pipe part and the first interface (11) to the joint of the first pipe part and the second interface (12).
4. The electric vehicle air conditioning system refrigeration circuit of claim 3, wherein: the battery heat exchanger outlet pipeline (2) comprises a third interface (21), a fourth interface (22) and a second pipe part (23), wherein the third interface (21) is communicated with the battery heat exchanger, the fourth interface (22) is communicated with the tee joint device (3), the second pipe part (23) is used for being communicated with the third interface (21) and the fourth interface (22), the second pipe part (23) is used for accommodating and flowing to the refrigerant of the fourth interface (22) through the third interface (21), and the height of the second pipe part (23) is gradually reduced from the joint of the second pipe part and the third interface (21) to the joint of the second pipe part and the fourth interface (22).
5. The electric vehicle air conditioning system refrigeration circuit of claim 4, wherein: the compressor return air pipeline (4) comprises a fifth interface (41), a sixth interface (42) and a third pipe part (43), wherein the fifth interface (41) is communicated with the tee joint device (3), the sixth interface (42) is communicated with the electric compressor, the third pipe part (43) is used for accommodating and flowing to the refrigerant of the sixth interface (42) through the fifth interface (41), and the height of the third pipe part (43) is gradually reduced from the joint of the third pipe part and the fifth interface (41) to the joint of the third pipe part and the sixth interface (42).
6. The electric vehicle air conditioning system refrigeration circuit of claim 5, wherein: the tee joint device (3) comprises a first tee joint interface (31), a second tee joint interface (32) and a third tee joint interface (33) which are communicated with each other, the first tee joint interface (31) is communicated with the second interface (12), the second tee joint interface (32) is communicated with the fourth interface (22), the third tee joint interface (33) is communicated with the fifth interface (41), and the tee joint device (3) is used for accommodating and flowing the refrigerant flowing to the third tee joint interface (33) through the first tee joint interface (31) and/or the second tee joint interface (32), and the first tee joint interface (31) and the second tee joint interface (32) are higher than the third tee joint interface (33) in the height direction.
7. The electric vehicle air conditioning system refrigeration circuit of claim 6, wherein: the third tee joint (33) is arranged below a connecting line of the first tee joint (31) and the second tee joint (32) in the height direction.
8. The electric vehicle air conditioning system refrigeration circuit of claim 6, wherein: the tee joint device (3) further comprises a straight pipe portion (3 a) and a branch pipe portion (3 b) which are integrally formed, the first tee joint interface (31) and the third tee joint interface (33) are respectively arranged on the straight pipe portion (3 a) which is communicated with each other and two opposite end portions, the second tee joint interface (32) is arranged on one end portion of the branch pipe portion (3 b), the other end portion of the branch pipe portion (3 b) is communicated with the middle portion of the straight pipe portion (3 a), and the straight pipe portion (3 a) is connected with one section of the first tee joint interface (31) and the branch pipe portion (3 b) to form an included angle smaller than 180 degrees.
9. The electric vehicle air conditioning system refrigeration circuit of claim 8, wherein: the end of the branch pipe part (3 b) which is communicated with the straight pipe part (3 a) is arranged below a connecting line of the first three-way joint (31) and the second three-way joint (32) in the height direction.
10. The electric vehicle air conditioning system refrigeration circuit of claim 8, wherein: the straight pipe portion (3 a) and the branch pipe portion (3 b) are arranged in the vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322118345.4U CN220517929U (en) | 2023-08-07 | 2023-08-07 | Refrigerating circuit of air conditioning system of electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322118345.4U CN220517929U (en) | 2023-08-07 | 2023-08-07 | Refrigerating circuit of air conditioning system of electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220517929U true CN220517929U (en) | 2024-02-23 |
Family
ID=89938513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322118345.4U Active CN220517929U (en) | 2023-08-07 | 2023-08-07 | Refrigerating circuit of air conditioning system of electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220517929U (en) |
-
2023
- 2023-08-07 CN CN202322118345.4U patent/CN220517929U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
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Denomination of utility model: A refrigeration circuit for an electric vehicle air conditioning system Granted publication date: 20240223 Pledgee: Tongxiang Science and Technology Entrepreneurship Service Center Co.,Ltd. Pledgor: United New Energy Automobile Co.,Ltd. Registration number: Y2024330000709 |