阅读说明：本技术 车辆热管理系统 (Vehicle thermal management system ) 是由 何贤 金江峰 王亚苹 钱程 苏建 于 2018-09-10 设计创作，主要内容包括：本发明提供了一种车辆热管理系统,包括：制冷回路,制冷回路包括压缩机、冷凝器和第一换热器,压缩机、冷凝器和第一换热器通过连通管路连通以形成制冷回路；第一换热器用于对动力电池和乘员舱进行制冷。采用本发明提供的技术方案,解决了现有技术中的车辆热管理系统的零部件数量较多的技术问题。(The invention provides a vehicle thermal management system, comprising: the refrigeration system comprises a refrigeration loop, a first heat exchanger, a second heat exchanger and a control circuit, wherein the refrigeration loop comprises a compressor, a condenser and the first heat exchanger, and the compressor, the condenser and the first heat exchanger are communicated through a communication pipeline to form a refrigeration loop; the first heat exchanger is used for refrigerating the power battery and the passenger compartment. By adopting the technical scheme provided by the invention, the technical problem that the number of parts of the vehicle thermal management system in the prior art is large is solved.)

1. A vehicle thermal management system, comprising:

a refrigeration circuit comprising a compressor (10), a condenser (20) and a first heat exchanger (30), the compressor (10), the condenser (20) and the first heat exchanger (30) being in communication by means of a communication line to form the refrigeration circuit;

the first heat exchanger (30) is used for refrigerating the power battery and the passenger compartment.

2. The vehicle thermal management system of claim 1, further comprising:

a first heat exchange loop which utilizes the refrigerant of the first heat exchanger (30) to refrigerate the power battery.

3. The vehicle thermal management system of claim 2, wherein the first heat exchanger (30) is a plate heat exchanger having a refrigerant passage and a heat exchanger passage, one end of the refrigeration circuit being in communication with one end of the refrigerant passage, the other end of the refrigeration circuit being in communication with the other end of the refrigerant passage; the refrigerant channel is used for exchanging heat with the heat exchanger channel so as to refrigerate the heat exchanger in the heat exchanger channel, one end of the first heat exchange loop is communicated with one end of the heat exchanger channel, and the other end of the first heat exchange loop is communicated with the other end of the heat exchanger channel; and the first heat exchange loop is also provided with a first battery cold plate (40) so as to refrigerate the power battery through the first battery cold plate (40).

4. The vehicle thermal management system of claim 3, further comprising:

one end of the second heat exchange loop is communicated with one end of the heat exchanger channel, the other end of the second heat exchange loop is communicated with the other end of the heat exchanger channel, a second heat exchanger (50) is further arranged on the second heat exchange loop, and the second heat exchanger (50) is used for exchanging heat between the heat exchanger in the heat exchanger channel and air in the passenger compartment so as to reduce the temperature in the passenger compartment.

5. The vehicle thermal management system of claim 4, comprising a main circuit on which the heat exchanger passages are disposed, a first branch circuit on which the first battery cold plate (40) is disposed, and a second branch circuit on which the second heat exchanger (50) is disposed; the main path is communicated with the first branch circuit to form the first heat exchange loop, and the main path is communicated with the second branch circuit to form the second heat exchange loop; wherein the main path is further provided with a first heater (60), and the first heater (60) is used for heating the heat exchange agent in the main path.

6. The vehicle thermal management system of claim 5, further comprising a first air blower (70), the first air blower (70) being disposed at the second heat exchanger (50) to blow the heat exchanged air into the passenger compartment.

7. The vehicle thermal management system of claim 5, wherein a first pump body (80) is further disposed on the main road.

8. The vehicle thermal management system of claim 5, further comprising a first valve assembly through which the main circuit is selectively in communication with the first branch and/or the second branch.

9. The vehicle thermal management system of claim 3, further comprising:

one end of the third heat exchange loop is communicated with one end of the refrigerant channel, the other end of the third heat exchange loop is communicated with the other end of the refrigerant channel, a third heat exchanger (100) is further arranged on the third heat exchange loop, and the third heat exchanger (100) is used for exchanging heat between the refrigerant in the refrigerant channel and the air in the passenger compartment so as to reduce the temperature in the passenger compartment.

10. The vehicle thermal management system of claim 9, further comprising a second valve assembly through which the first heat exchanger (30) is selectively in communication with the refrigeration circuit and/or the third heat exchange circuit.

11. The vehicle thermal management system of claim 9, further comprising a second heater (120) disposed on the first heat exchange circuit, wherein the second heater (120) is configured to heat a heat exchange agent circulating in the first heat exchange circuit.

12. The vehicle thermal management system of claim 9, further characterized in that a second pump body (130) is disposed on the first heat exchange circuit.

13. The vehicle thermal management system of claim 9, further comprising a second air mover (140), the second air mover (140) disposed at the third heat exchanger (100) to blow the heat exchanged air into the passenger compartment.

14. The vehicle thermal management system of claim 9, further comprising a third heater (150), the third heater (150) for heating air within the passenger compartment.

15. The vehicle thermal management system according to claim 1, further comprising a duct portion (160), the duct portion (160) including a main duct (161), a first duct branch (162) connected to the main duct (161), and a second duct branch (163) connected to the main duct (161), the first heat exchanger (30) being disposed within the main duct (161), the first duct branch (162) being configured to cool the passenger compartment;

the vehicle thermal management system further comprises a fourth heat exchange loop, a fourth heat exchanger (170) and a second battery cold plate (180) are arranged on the fourth heat exchange loop, and a heat exchange agent of the fourth heat exchanger (170) is used for exchanging heat with cold air in the second air duct branch (163) so as to refrigerate the power battery through the second battery cold plate (180).

16. The vehicle thermal management system of claim 15, wherein the main duct (161) is in selectable communication with the first duct branch (162) and/or the second duct branch (163).

17. The vehicle thermal management system of claim 16, further comprising a damper (290), the damper (290) being movably disposed at an intersection of the main duct (161) and the first and second duct branches (162, 163), the damper (290) having a first blocking position blocking the first duct branch (162), a second blocking position blocking the second duct, and an escape position communicating the main duct (161) with both the first and second duct branches (162, 163).

18. The vehicle thermal management system of claim 15, further comprising a fourth heater (270) disposed on the fourth heat exchange circuit, wherein the fourth heater (270) is configured to heat a heat exchange agent in the fourth heat exchange circuit.

19. The vehicle thermal management system of claim 15, further comprising a third pump body (190) disposed on the fourth heat exchange circuit.

20. The vehicle thermal management system according to claim 15, characterized in that a fifth heater (200) is arranged at an air outlet of the first duct branch (162), and the fifth heater (200) is used for heating air in the passenger compartment.

21. The vehicle thermal management system of claim 16, wherein a third fan (210) is disposed within the main duct (161) to blow air within the main duct (161) toward the first duct branch (162) and/or the second duct branch (163).

Technical Field

The invention relates to the technical field of new energy electric automobiles, in particular to a vehicle thermal management system.

Background

At present, for a pure electric vehicle, a heavy truck and a light truck in the prior art, two independent refrigeration systems are generally adopted to be independently controlled so as to respectively control the cooling and heating of a cab and the cooling and heating of a power battery. The single control mode is simple, but has high cost, more parts and low energy utilization rate.

Disclosure of Invention

The invention mainly aims to provide a vehicle thermal management system to solve the technical problem that the number of parts of the vehicle thermal management system in the prior art is large.

In order to achieve the above object, the present invention provides a vehicle thermal management system including: the refrigeration system comprises a refrigeration loop, a first heat exchanger, a second heat exchanger and a control circuit, wherein the refrigeration loop comprises a compressor, a condenser and the first heat exchanger, and the compressor, the condenser and the first heat exchanger are communicated through a communication pipeline to form a refrigeration loop; the first heat exchanger is used for refrigerating the power battery and the passenger compartment.

Further, the vehicle thermal management system further comprises: and the first heat exchange loop utilizes the refrigerant of the first heat exchanger to refrigerate the power battery.

Furthermore, the first heat exchanger is a plate heat exchanger, the plate heat exchanger is provided with a refrigerant channel and a heat exchange agent channel, one end of the refrigeration loop is communicated with one end of the refrigerant channel, and the other end of the refrigeration loop is communicated with the other end of the refrigerant channel; the refrigerant channel is used for exchanging heat with the heat exchanger channel so as to refrigerate the heat exchanger in the heat exchanger channel, one end of the first heat exchange loop is communicated with one end of the heat exchanger channel, and the other end of the first heat exchange loop is communicated with the other end of the heat exchanger channel; still be provided with first battery cold drawing on the first heat transfer circuit to refrigerate power battery through first battery cold drawing.

Further, the vehicle thermal management system further comprises: and one end of the second heat exchange loop is communicated with one end of the heat exchanger channel, the other end of the second heat exchange loop is communicated with the other end of the heat exchanger channel, a second heat exchanger is further arranged on the second heat exchange loop, and the second heat exchanger is used for exchanging heat between the heat exchanger in the heat exchanger channel and air in the passenger cabin so as to reduce the temperature in the passenger cabin.

The vehicle thermal management system further comprises a main road, a first branch road and a second branch road, wherein the heat exchanger channel is arranged on the main road, the first branch road is provided with a first battery cold plate, and the second branch road is provided with a second heat exchanger; the main path is communicated with the first branch circuit to form a first heat exchange loop, and the main path is communicated with the second branch circuit to form a second heat exchange loop; the main path is also provided with a first heater, and the first heater is used for heating the heat exchange agent in the main path.

Further, the vehicle thermal management system also comprises a first fan, and the first fan is arranged at the second heat exchanger to blow the air after heat exchange to the passenger compartment.

Further, still be provided with first pump body on the main road.

Further, the vehicle thermal management system also includes a first valve assembly through which the main circuit is selectively in communication with the first branch circuit and/or the second branch circuit.

Further, the vehicle thermal management system further comprises: and one end of the third heat exchange loop is communicated with one end of the refrigerant channel, the other end of the third heat exchange loop is communicated with the other end of the refrigerant channel, a third heat exchanger is further arranged on the third heat exchange loop, and the third heat exchanger is used for exchanging heat between the refrigerant in the refrigerant channel and the air in the passenger cabin so as to reduce the temperature in the passenger cabin.

Further, the vehicle thermal management system also includes a second valve assembly through which the first heat exchanger is selectively in communication with the refrigeration circuit and/or the third heat exchange circuit.

Furthermore, a second heater is arranged on the first heat exchange loop and used for heating the heat exchange agent circulating in the first heat exchange loop.

Further, a second pump body is arranged on the first heat exchange loop.

The vehicle thermal management system is further characterized by further comprising a second fan, wherein the second fan is arranged at the third heat exchanger to blow the air subjected to heat exchange to the passenger compartment.

Further, the vehicle thermal management system also comprises a third heater, and the third heater is used for heating air in the passenger compartment.

The vehicle heat management system further comprises an air duct part, the air duct part comprises a main air duct, a first air duct branch connected with the main air duct and a second air duct branch connected with the main air duct, the first heat exchanger is arranged in the main air duct, and the first air duct branch is used for refrigerating the passenger compartment; the vehicle heat management system further comprises a fourth heat exchange loop, a fourth heat exchanger and a second battery cold plate are arranged on the fourth heat exchange loop, and a heat exchange agent of the fourth heat exchanger is used for exchanging heat with cold air in the second air duct branch so as to refrigerate the power battery through the second battery cold plate.

Further, the main duct is selectively communicated with the first duct branch and/or the second duct branch.

The vehicle heat management system further comprises an air door, the air door is movably arranged at the position of the intersection of the main air duct and the first air duct branch and the second air duct branch, and the air door is provided with a first blocking position for blocking the first air duct branch, a second blocking position for blocking the second air duct and an avoiding position for enabling the main air duct to be communicated with the first air duct branch and the second air duct branch.

Further, a fourth heater is further arranged on the fourth heat exchange loop, and the fourth heater is used for heating the heat exchange agent in the fourth heat exchange loop.

Further, a third pump body is arranged on the fourth heat exchange loop.

Further, a fifth heater is arranged at an air outlet of the first air duct branch, and the fifth heater is used for heating air in the passenger compartment.

Further, a third fan is arranged in the main air duct to blow air in the main air duct to the first air duct branch and/or the second air duct branch.

By applying the technical scheme of the invention, the power battery and the passenger compartment can be refrigerated through the first heat exchanger of the same refrigeration loop, and compared with the condition that two sets of independent heat management systems are needed to refrigerate the battery and the passenger compartment respectively in the prior art, the vehicle heat management system of the invention shares the same refrigeration loop, thereby reducing the number of parts. Therefore, the vehicle thermal management system provided by the invention can solve the technical problem that the number of parts of the vehicle thermal management system in the prior art is large.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural diagram illustrating a vehicle thermal management system according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a vehicle thermal management system according to a second embodiment of the invention;

FIG. 3 is a schematic structural diagram of a vehicle thermal management system according to a third embodiment of the invention;

FIG. 4 is a schematic structural diagram of a vehicle thermal management system according to a fourth embodiment of the invention;

FIG. 5 is a schematic structural diagram of a vehicle thermal management system according to a fifth embodiment of the invention;

fig. 6 shows a schematic structural diagram of a vehicle thermal management system according to a sixth embodiment of the invention.

Wherein the figures include the following reference numerals:

10. a compressor; 20. a condenser; 30. a first heat exchanger; 40. a first battery cold plate; 50. a second heat exchanger; 60. a first heater; 70. a first fan; 80. a first pump body; 91. a first valve; 92. a second valve; 93. a third valve; 100. a third heat exchanger; 111. a fourth valve; 112. a fifth valve; 113. a sixth valve; 114. a seventh valve; 120. a second heater; 130. a second pump body; 140. a second fan; 150. a third heater; 160. an air duct portion; 161. a main air duct; 162. a first air duct branch; 163. a second duct branch; 170. a fourth heat exchanger; 180. a second battery cold plate; 190. a third pump body; 200. fifth heating device; 210. a third fan; 220. an electromagnetic three-way valve; 230. an H-shaped thermostatic expansion valve; 240. a condensing fan; 250. an electronic expansion valve; 260. a reservoir; 270. a fourth heater; 280. a fourth fan; 290. a damper.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in FIG. 1, a vehicle thermal management system is provided according to one embodiment of the present invention and includes a refrigeration circuit. The refrigeration circuit comprises a compressor 10, a condenser 20 and a first heat exchanger 30, wherein the compressor 10, the condenser 20 and the first heat exchanger 30 are communicated through a communication pipeline to form the refrigeration circuit. The first heat exchanger 30 is used to cool the power battery and the passenger compartment. Specifically, the vehicle thermal management system in this embodiment further includes an expansion valve and a condensing fan 240. The expansion valve is an H-type thermostatic expansion valve 230 to throttle the refrigerant in the refrigeration circuit. Wherein, the condensing fan 240 is disposed at the condenser 20 to perform heat exchange and refrigeration better. The first heat exchanger 30 may be a plate heat exchanger.

By adopting the vehicle heat management system provided by the first embodiment of the invention, the power battery and the passenger compartment can be refrigerated through the first heat exchanger 30 of the same refrigeration loop, and compared with the prior art that two sets of independent heat management systems are needed to refrigerate the battery and the passenger compartment respectively, the vehicle heat management system provided by the invention shares the same refrigeration loop, so that the number of parts is reduced. Therefore, the vehicle thermal management system provided by the invention can solve the technical problem that the thermal management system in the prior art has more parts. Meanwhile, the vehicle thermal management system provided by the invention saves the installation space, reduces the overall cost and has a compact structure.

Specifically, the vehicle thermal management system in this embodiment further includes a first heat exchange loop, and the first heat exchange loop uses the refrigerant of the first heat exchanger 30 to cool the power battery.

In the present embodiment, the first heat exchanger 30 is a plate heat exchanger having a refrigerant passage and a heat exchanger passage, one end of the refrigeration circuit communicates with one end of the refrigerant passage, and the other end of the refrigeration circuit communicates with the other end of the refrigerant passage. The refrigerant channel is used for exchanging heat with the heat exchanger channel so as to refrigerate the heat exchanger in the heat exchanger channel, one end of the first heat exchange loop is communicated with one end of the heat exchanger channel, and the other end of the first heat exchange loop is communicated with the other end of the heat exchanger channel. The first heat exchange loop is also provided with a first battery cold plate 40 so as to refrigerate the power battery through the first battery cold plate 40. The heat exchanger in this embodiment may be an antifreeze.

Specifically, the vehicle thermal management system further comprises a second heat exchange loop, one end of the second heat exchange loop is communicated with one end of the heat exchanger channel, and the other end of the second heat exchange loop is communicated with the other end of the heat exchanger channel. The second heat exchange circuit is further provided with a second heat exchanger 50, and the second heat exchanger 50 is used for exchanging heat between the heat exchange agent in the heat exchange agent channel and air in the passenger compartment so as to reduce the temperature in the passenger compartment. The second heat exchanger 50 may be a water heat exchanger.

Specifically, the vehicle thermal management system in this embodiment includes a main route, a first branch route, and a second branch route. The heat exchanger channel is arranged on the main path, a first battery cold plate 40 is arranged on the first branch path, and a second heat exchanger 50 is arranged on the second branch path. The main path is communicated with the first branch circuit to form a first heat exchange loop, and the main path is communicated with the second branch circuit to form a second heat exchange loop. Wherein, the main path is further provided with a first heater 60, and the first heater 60 is used for heating the heat exchange agent in the main path. The first heater 60 is a PTC water heating heater. When the power battery or the passenger compartment is refrigerated, the controller controls the refrigeration loop to work, and the first heater 60 does not work. When the power battery or the passenger compartment needs to be heated, the refrigeration loop stops working, the controller controls the first heater 60 to be started, the first heater 60 works to heat the heat exchange agent in the main path, and part of the heat exchange agent heated by the first heater 60 enters the first branch and flows through the first battery cold plate 40 to heat the power battery; another portion of the heat transfer agent heated by the heater enters the second branch, flows through the second heat exchanger 50, and exchanges heat with the air in the passenger compartment to raise the temperature in the passenger compartment.

To better deliver the heat exchanged air into the passenger compartment, the vehicle thermal management system in this embodiment further includes a first air blower 70. Specifically, the first fan 70 is disposed at the second heat exchanger 50 to blow air heat-exchanged by the second heat exchanger 50 into the passenger compartment.

In this embodiment, a first pump 80 is further disposed on the main path to provide circulation power for the heat exchanger in the pipeline. The first pump body 80 in this embodiment may be an electronic water pump.

The vehicle thermal management system in this embodiment further includes a first valve assembly through which the main circuit is selectively in communication with the first branch, or with the second branch, or with both the first branch and the second branch. When the power battery needs to be cooled or heated, the main path is communicated with the first branch path through the first valve assembly; when the air in the passenger cabin needs to be cooled or heated, the main path is communicated with the second branch path through the first valve assembly; when the power battery and the air in the passenger cabin need to be cooled or heated simultaneously, the main path is communicated with the first branch and the second branch through the first valve assembly.

Specifically, the first valve assembly includes a first valve 91, a second valve 92, and a third valve 93. Wherein, first valve 91 is the three-way valve, and first valve 91 is two, and the main road has two intercommunications with first branch road and second branch road, and two first valves 91 correspond and set up in two intercommunications. The second valve 92 is arranged on the first branch, the third valve 93 is arranged on the second branch, and the second valve 92 and the third valve 93 are both water valves. When cooling of the battery cold plate is not required, the second valve 92 may be closed; when cooling of the passenger compartment is not required, the third valve 93 may be closed.

As shown in fig. 2, a vehicle thermal management system according to a second embodiment of the present invention includes an electromagnetic three-way valve 220, where the electromagnetic three-way valve 220 belongs to a four-position three-way valve. The main path has two communication points with the first branch path and the second branch path, and the three-way electromagnetic valve 220 may be disposed at any one of the two communication points, and the three-way electromagnetic valve 220 replaces the first valve assembly in the first embodiment.

In both the first embodiment and the second embodiment, the heat exchange agent is used for carrying out cold or heat so as to cool or heat the power battery or the passenger compartment.

As shown in fig. 3, a vehicle thermal management system is provided in the third embodiment of the present invention, and the vehicle thermal management system in the third embodiment further includes a third heat exchange loop. One end of the third heat exchange loop is communicated with one end of the refrigerant channel, and the other end of the third heat exchange loop is communicated with the other end of the refrigerant channel. The third heat exchange circuit is further provided with a third heat exchanger 100, and the third heat exchanger 100 is used for exchanging heat between the refrigerant in the refrigerant channel and the air in the passenger cabin to reduce the temperature in the passenger cabin. Specifically, the third heat exchanger 100 may be an evaporator.

Specifically, the vehicle thermal management system in this embodiment further includes a second valve assembly, and the first heat exchanger 30 is selectively communicated with the refrigeration circuit, the third heat exchange circuit, or both the refrigeration circuit and the third heat exchange circuit through the second valve assembly.

The second valve assembly in this embodiment includes a fourth valve 111, a fifth valve 112, a sixth valve 113, and a seventh valve 114. Specifically, the third heat exchange circuit and the refrigeration circuit have two communicating positions, the fourth valve 111 and the fifth valve 112 are respectively arranged at the two communicating positions, wherein the fourth valve 111 is an electromagnetic valve, the fifth valve 112 is a three-way valve, the sixth valve 113 is arranged on a pipeline between the first heat exchanger 30 and the communicating position where the three-way valve is arranged, the seventh valve 114 is arranged on the third heat exchange circuit, and the sixth valve 113 and the seventh valve 114 are both electromagnetic valves. When the power battery does not need to be cooled or heated, the sixth valve 113 can be closed; the seventh valve 114 may be closed when cooling or heating of the passenger compartment is not required.

In order to heat the power battery, a second heater 120 is further disposed on the first heat exchange loop in this embodiment. The second heater 120 is configured to heat a heat exchanger circulating in the first heat exchange loop, and the heated heat exchanger flows through the first battery cold plate 40 and heats the power battery. When the power battery needs to be heated, the controller controls the refrigeration loop to be out of operation. When the power battery needs to be refrigerated, the controller controls the second heater 120 not to work; when the power battery needs to be heated, the controller controls the refrigeration loop not to work, and controls the second heater 120 to work so as to heat the heat exchanger in the first heat exchange loop.

In order to facilitate the circulation of the heat exchange agent in the first heat exchange loop, in this embodiment, a second pump body 130 is further disposed on the first heat exchange loop. The second pump body 130 in this embodiment may be an electronic water pump.

The vehicle thermal management system in the present embodiment further includes a second fan 140, and the second fan 140 is disposed at the third heat exchanger 100 to blow the heat-exchanged air into the passenger compartment.

In order to heat the passenger compartment, the vehicle thermal management system in this embodiment further includes a third heater 150, and the third heater 150 is used for heating air at the air outlet of the passenger compartment.

By adopting the vehicle thermal management system provided by the embodiment, a part of refrigerant in the refrigeration loop enters the first heat exchanger 30 and enters the first heat exchange loop to refrigerate the heat exchange agent, and finally, the power battery is refrigerated through the battery cold plate; another portion of the air refrigerant in the refrigeration circuit will enter the third heat exchange circuit, and the refrigerant in the third heat exchange circuit will be cooled by the third heat exchanger 100 and the air in the passenger compartment.

As shown in fig. 4, a vehicle thermal management system according to a fourth embodiment of the present invention includes an electromagnetic three-way valve 220. The electromagnetic three-way valve 220 is a four-way three-way valve, and the electromagnetic three-way valve 220 is provided at the position where the fifth valve 112 in the second embodiment is provided, and the electromagnetic valves replace the fifth valve 112, the sixth valve 113, and the seventh valve 114 in the third embodiment.

As shown in fig. 5, a fifth embodiment of the present invention provides a vehicle thermal management system, where the vehicle thermal management system in this embodiment includes an electronic expansion valve 250, and the electronic expansion valve 250 is disposed on a refrigeration circuit. The electronic expansion valve 250 in this embodiment replaces the thermostatic expansion valve in the fourth embodiment. Therefore, the heat exchange amount of the first heat exchanger 30 and the heat exchange amount of the third heat exchanger 100 can be accurately controlled, and the phenomena of narrow refrigerant flow adjusting range, low adjusting speed and poor energy efficiency under different working conditions are avoided. In the fifth embodiment, two fourth valves 111 are provided, the two fourth valves 111 are respectively provided at two communication positions of the third heat exchange circuit and the refrigeration circuit, and the refrigeration circuit of the fifth embodiment is further provided with an accumulator 260.

As shown in fig. 6, a sixth embodiment of the present invention provides a vehicle thermal management system, which further includes an air duct portion 160, where the air duct portion 160 includes a main air duct 161, a first air duct branch 162 connected to the main air duct 161, and a second air duct branch 163 connected to the main air duct 161. The first heat exchanger 30 is disposed in the main duct 161, and the first duct branch 162 is used for cooling the passenger compartment. The vehicle thermal management system further comprises a fourth heat exchange loop, a fourth heat exchanger 170 and a second battery cold plate 180 are arranged on the fourth heat exchange loop, and a heat exchanger of the fourth heat exchanger 170 is used for exchanging heat with cold air in the second air duct branch 163 to refrigerate the power battery through the second battery cold plate 180. A fourth fan 280 is also provided at the fourth heat exchanger 170.

In this embodiment, the main duct 161 may selectively communicate with the first duct branch 162, the second duct branch 163, or both the first duct branch 162 and the second duct branch 163. When only the passenger compartment needs to be refrigerated, the main air duct 161 is communicated with the first air duct branch 162; when only the power battery needs to be refrigerated, the main air duct 161 is communicated with the second air duct branch 163; when the passenger compartment and the power battery need to be cooled simultaneously, the main air duct 161 is communicated with both the first air duct branch 162 and the second air duct branch 163.

Specifically, the vehicle thermal management system further includes a damper 290, the damper 290 is movably disposed at a crossing position of the main air duct 161 and the first air duct branch 162 and the second air duct branch 163, and the damper 290 has a first blocking position for blocking the first air duct branch 162, a second blocking position for blocking the second air duct, and an avoiding position for enabling the main air duct 161 to communicate with both the first air duct branch 162 and the second air duct branch 163. The damper 290 in this embodiment may be an electric damper, which is located at the AB position when the power battery does not need to be cooled; when the passenger compartment does not need to be refrigerated, the electric air door is in the AC position; when the power battery and the passenger compartment need to be cooled simultaneously, the electric air door is in the AD position.

Specifically, a fourth heater 270 is further disposed on the fourth heat exchange loop in this embodiment, and the fourth heater 270 is used for heating the heat exchange agent in the fourth heat exchange loop. The fourth heater 270 in this embodiment may be a plumbing PTC.

In order to facilitate the circulation of the heat exchange agent in the fourth heat exchange loop, a third pump 190 is further disposed on the fourth heat exchange loop in this embodiment. Specifically, the third pump body 190 may be an electric water pump.

In the present embodiment, a fifth heater 200 is disposed at the air outlet of the first duct branch 162, and the fifth heater 200 is used for heating the air in the passenger compartment. The fifth heater 200 in this embodiment may be a wind-heated PTC.

Specifically, the third fan 210 is disposed in the main air duct 161, and the third fan 210 can blow air in the main air duct 161 to the first air duct branch 162, the second air duct branch 163, or the first air duct branch 162 and the second air duct branch 163.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the thermal management system provided by the invention has the advantages of compact structure, few parts and low cost. The heat management system in the prior art is 2 units, but the heat management system provided by the invention only needs 1 unit, so that the space is saved, the weight of the product is reduced, and the units are light and small.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.