Thermal management system

Abstract

The application discloses a kind of heat management systems, belong to heat management technical field, this heat management system includes first refrigerant circuit, second refrigerant circuit, first heat exchange piece, second heat exchange piece and valve assembly.First refrigerant circuit includes compressor, and battery module is provided on first refrigerant circuit;Second refrigerant circuit includes first fluorine pump, and first power module is provided on second refrigerant circuit;First heat exchange piece includes first refrigerant flow channel, second refrigerant flow channel and first heat exchange part, and first refrigerant flow channel is connected in series on second refrigerant circuit;Second heat exchange piece includes third refrigerant flow channel and second heat exchange part, and third refrigerant flow channel is connected in series on first refrigerant circuit;Valve assembly is connected with first refrigerant circuit, second refrigerant flow channel respectively, for controlling the on-off of first refrigerant circuit and second refrigerant flow channel.By valve assembly switching single-source heat pump mode and double-source heat pump mode, recycling first power module waste heat, improve the energy efficiency of heat management system.

Description

Technical Field

[0001] This application relates to the field of thermal management technology, and more particularly to a thermal management system. Background Technology

[0002] Thermal management systems play a crucial role in energy storage, power electronics, and new energy vehicles, primarily used for temperature control of heat-generating components such as battery modules and power modules to ensure safe and stable system operation. With the increasing integration of systems, higher demands are being placed on the miniaturization, high energy efficiency, and low cost of thermal management systems.

[0003] In the thermal management system, there is a lack of effective heat source coordination between the refrigerant circuit where the compressor is located and the refrigerant circuit where the power module is located. Summary of the Invention

[0004] This application provides a thermal management system designed to address the technical problem of a lack of effective heat source coordination between the refrigerant circuit where the compressor is located and the refrigerant circuit where the power module is located.

[0005] To achieve the above objectives, the thermal management system disclosed in this application includes: A first refrigerant circuit, the first refrigerant circuit includes a compressor, and a battery module is provided on the first refrigerant circuit; The second refrigerant circuit includes a first refrigerant pump and a first power module is provided on the second refrigerant circuit. The first heat exchanger includes a first refrigerant channel, a second refrigerant channel, and a first heat exchange section. The first heat exchange section is used to exchange heat between the external medium and the medium in the first refrigerant channel and the second refrigerant channel. The first refrigerant channel is connected in series with the second refrigerant circuit. The second heat exchanger has a third refrigerant channel and a second heat exchange section for mutual heat exchange. The second heat exchange section is used to exchange heat between the external medium and the medium in the third refrigerant channel. The third refrigerant channel is connected in series with the first refrigerant circuit. A valve assembly is connected to the first refrigerant circuit and the second refrigerant channel respectively, and is used to control the opening and closing of the first refrigerant circuit and the second refrigerant channel to realize the switching between single-source heat pump mode and dual-source heat pump mode.

[0006] In some embodiments, the second refrigerant circuit is further provided with a second power module.

[0007] In some embodiments, a second power module is further provided on the circuit connecting the second refrigerant channel and the valve assembly.

[0008] In some embodiments, the second refrigerant circuit includes a main circuit and a first branch circuit, wherein the first branch circuit is connected in parallel to the main circuit; The main circuit is connected to the valve assembly. The first power module is located on the main circuit, and the second power module is located on the first branch circuit. The second power module is connected in parallel with the first power module.

[0009] In some embodiments, the first refrigerant circuit further includes a four-way reversing valve and an expansion valve; The thermal management system also includes: A first bypass passage, one end of which is connected to the inlet end of the four-way reversing valve, and the other end of which is connected to the outlet end of the four-way reversing valve. The second bypass passage has one end connected to the inlet end of the expansion valve and the other end connected to the outlet end of the expansion valve.

[0010] In some embodiments, the thermal management system further includes: The third bypass passage has one end connected to the inlet end of the third refrigerant channel and the other end connected to the outlet end of the third refrigerant channel. A heating element is disposed on the third bypass passage.

[0011] In some embodiments, the second refrigerant circuit further includes a second branch, which is connected in parallel with the main circuit and the first branch, respectively. One end of the second branch is connected to the inlet end of the first refrigerant pump, and the other end of the second branch is connected to the valve assembly.

[0012] In some embodiments, the thermal management system further includes: A fourth bypass passage, one end of which is connected to the inlet of the first refrigerant channel, and the other end of which is connected to the outlet of the first refrigerant channel.

[0013] In some embodiments, the thermal management system further includes a heating element disposed on the second bypass passage.

[0014] In some embodiments, a second fluorine pump is also provided on the second bypass passage.

[0015] In some embodiments, a second fluorine pump is also provided on the first bypass passage.

[0016] In some embodiments, the second refrigerant circuit includes a first circuit and a second circuit, both of which are connected to the valve assembly. The first circuit is provided with a first power module and a second power module, and the second circuit is provided with a first refrigerant pump.

[0017] In some embodiments, the thermal management system includes an integration module that integrates the expansion valve and the valve assembly.

[0018] In some embodiments, the thermal management system further includes a heat exchanger assembly and a refrigerant pipe assembly, wherein the heat exchanger assembly includes at least one first heat exchanger and at least one second heat exchanger; The first refrigerant flow channel and the second refrigerant flow channel of at least one of the first heat exchangers are both connected to the refrigerant pipe assembly, and the third refrigerant flow channel of at least one of the second heat exchangers is connected to the refrigerant pipe assembly; The number of integrated modules is multiple, and the multiple integrated modules are connected in parallel to the refrigerant pipe group.

[0019] The thermal management system disclosed in this application controls the on / off state of the first refrigerant circuit and the second refrigerant channel through a valve assembly, enabling flexible switching between single-source and dual-source heat pump modes. In single-source heat pump mode, the system utilizes only ambient air as the evaporator-side heat source to heat the battery module, resulting in a simple structure and convenient control. In dual-source heat pump mode, the valve assembly connects the first refrigerant circuit and the second refrigerant channel, allowing the low-temperature refrigerant in the first refrigerant circuit to flow through the second and third refrigerant channels. While flowing through the second refrigerant channel, it absorbs waste heat generated by the operation of the first power module in the second refrigerant circuit, thus simultaneously utilizing ambient air and power module waste heat as evaporator-side heat sources. Waste heat utilization can be achieved through the on / off control of the valve assembly, improving the energy efficiency ratio in heat pump mode while reducing energy waste caused by direct discharge of power module waste heat. This solves the problem of difficulty in simultaneously utilizing air and power module waste heat as evaporator-side heat sources in heat pump mode.

[0020] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0023] Figure 1 This is a schematic diagram of the piping layout of the thermal management system according to an embodiment of this application; Figure 2 This is a schematic diagram of the piping layout of a thermal management system according to another embodiment of this application; Figure 3 This is a schematic diagram of the piping layout of a thermal management system according to another embodiment of this application; Figure 4 This is a schematic diagram of the piping layout of a thermal management system according to another embodiment of this application; Figure 5 This is a schematic diagram of the piping layout of a thermal management system according to another embodiment of this application; Figure 6 This is a schematic diagram of the piping layout of a thermal management system according to another embodiment of this application; Figure 7 This is a schematic diagram of the piping layout of a thermal management system according to another embodiment of this application; Figure 8 This is a schematic diagram of the piping layout of a thermal management system according to another embodiment of this application; Figure 9 This is a schematic diagram of the piping layout of a thermal management system according to another embodiment of this application; Figure 10 This is a schematic diagram of the piping layout of a thermal management system according to another embodiment of this application; Figure 11 This is a schematic diagram of the piping layout of a thermal management system according to another embodiment of this application; Figure 12 This is a schematic diagram of the piping layout of a thermal management system according to another embodiment of this application; Figure 13 This is a schematic diagram of the piping layout of a thermal management system according to another embodiment of this application; Figure 14 This is a schematic diagram of the piping layout of a thermal management system according to another embodiment of this application; Figure 15 This is a schematic diagram of the piping layout of a thermal management system according to another embodiment of this application; Figure 16 This is a schematic diagram of the piping layout of a thermal management system according to another embodiment of this application; Figure 17 This is a schematic diagram of the piping layout of a thermal management system according to another embodiment of this application.

[0024] Explanation of reference numerals in the attached figures: 100. First refrigerant circuit; 101. Compressor; 102. Battery module; 103. Four-way reversing valve; 104. Expansion valve; 110. First bypass passage; 111. Fourth valve; 112. Second refrigerant pump; 120. Second bypass passage; 121. Fifth valve; 105. Sixth valve; 130. Third bypass passage; 131. Seventh valve; 106. Eighth valve; 132. Heating element; 140. Fourth bypass passage; 141. Ninth valve; 142. Tenth valve; 200, Second refrigerant circuit; 201, First refrigerant pump; 202, First power module; 203, Second power module; 210, Main circuit; 220, First branch circuit; 211, First valve; 221, Second valve; 230, Second branch circuit; 231, Third valve; 240, First circuit; 250, Second circuit; 300, First heat exchanger; 310, First refrigerant flow channel; 320, Second refrigerant flow channel; 330, First heat exchange section; 400. Second heat exchanger; 410. Third refrigerant flow channel; 420. Second heat exchange section; 500. Valve assembly; 10. Integrated module; 20. Heat exchanger assembly; 30. Refrigerant piping assembly. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0026] In the description of this application, "multiple" means two or more, and "at least one" can mean one, two, or more, unless otherwise explicitly specified. Terms such as "first," "second," and "third" are used for convenience of description and are not intended to imply any order of importance between components or embodiments. It should be noted that the first power module 202 in this application can refer to a charging module, and the second power module 203 can refer to a power conversion module.

[0027] Thermal management systems play a crucial role in energy storage, power electronics, and new energy vehicles, primarily used for temperature control of heat-generating components such as battery module 102 and power module to ensure safe and stable system operation. With increasing system integration, higher demands are placed on the miniaturization, high energy efficiency, and low cost of thermal management systems. In this particular thermal management system, there is a lack of effective heat source coordination between the refrigerant circuit containing compressor 101 and the refrigerant circuit containing the power module.

[0028] In view of this, embodiments of this application provide a thermal management system aimed at solving at least one of the above-mentioned technical problems.

[0029] Please see Figure 1 The thermal management system in this embodiment includes a first refrigerant circuit 100, a second refrigerant circuit 200, a first heat exchanger 300, a second heat exchanger 400, and a valve assembly 500. The first refrigerant circuit 100 includes a compressor 101 and a battery module 102. The first refrigerant circuit 100 constitutes a circulation system with the compressor 101 as its power core, used for thermal management of the battery module 102. The second refrigerant circuit 200 includes a first refrigerant pump 201 and a first power module 202. The second refrigerant circuit 200 constitutes another independent circulation system. The second refrigerant circuit 200 utilizes the first refrigerant pump 201 to drive refrigerant flow, mainly used to absorb waste heat generated during the operation of the first power module 202.

[0030] The first heat exchanger 300 includes a first refrigerant channel 310, a second refrigerant channel 320, and a first heat exchange section 330. The first heat exchange section 330 is used to exchange heat between the external medium and the medium in the first refrigerant channel 310 and the second refrigerant channel 320. The first refrigerant channel 310 is connected in series with the second refrigerant circuit 200. The first heat exchanger 300 integrates two independent refrigerant channels internally. The first refrigerant channel 310 is integrated into the second refrigerant circuit 200, so that when the refrigerant in the second refrigerant circuit 200 flows through the first refrigerant channel 310, it can exchange heat with the outside air. The heat carried by the refrigerant can be released into the environment, or the refrigerant can absorb heat from the environment.

[0031] The second heat exchanger 400 includes a third refrigerant channel 410 and a second heat exchange section 420. The second heat exchange section 420 is used to exchange heat between the external medium and the medium in the third refrigerant channel 410. The third refrigerant channel 410 is connected in series with the first refrigerant circuit 100. The second heat exchanger 400 is a dual-medium heat exchange device, in which the third refrigerant channel 410 is integrated into the first refrigerant circuit 100. This allows the refrigerant in the first refrigerant circuit 100 to exchange heat with the outside air when flowing through the third refrigerant channel 410. The heat carried by the refrigerant can be released into the environment, or the refrigerant can absorb heat from the environment.

[0032] Valve assembly 500 is connected to both the first refrigerant circuit 100 and the second refrigerant flow channel 320, and is used to control the on / off state of the first refrigerant circuit 100 and the second refrigerant flow channel 320 to achieve switching between single-source heat pump mode and dual-source heat pump mode. As a key flow direction control node, the connection relationship of valve assembly 500 determines whether refrigerant in the first refrigerant circuit 100 can flow into the second refrigerant flow channel 320. By controlling this on / off relationship, the system can flexibly switch the heat source.

[0033] When valve assembly 500 disconnects the first refrigerant circuit 100 from the second refrigerant flow channel 320, the high-temperature, high-pressure gaseous refrigerant discharged from compressor 101 flows through the four-way reversing valve 103 and then through the battery module 102. It condenses and releases heat at the battery module 102, thus heating the module and converting the refrigerant into liquid refrigerant. The liquid refrigerant, after being throttled by expansion valve 104, flows through the third refrigerant flow channel 410, absorbs heat from the ambient air, and evaporates into gaseous refrigerant. It then flows through the four-way reversing valve 103 again and finally returns to compressor 101. In this mode, the heat source on the evaporation side of the first refrigerant circuit 100 comes only from the ambient air (single-source heat pump mode).

[0034] Please see Figure 5 When valve assembly 500 connects the first refrigerant circuit 100 and the second refrigerant channel 320, the high-temperature, high-pressure gaseous refrigerant discharged from compressor 101 flows through the four-way reversing valve 103 and then through the battery module 102. It condenses and releases heat at the battery module 102 to heat it, thus transforming the refrigerant into liquid refrigerant. After being throttled by expansion valve 104, the liquid refrigerant flows through the second refrigerant channel 320 and the third refrigerant channel 410. The refrigerant flowing through the second refrigerant channel 320 absorbs heat from the ambient air, and the refrigerant flowing through the third refrigerant channel 410 further absorbs heat from the ambient air and evaporates into gaseous refrigerant. In this mode, the heat source on the evaporation side of the first refrigerant circuit 100 still comes only from the ambient air (single-source heat pump mode).

[0035] Please see Figure 6 When valve assembly 500 connects the first refrigerant circuit 100 and the second refrigerant channel 320, both the first refrigerant circuit 100 and the second refrigerant circuit 200 operate simultaneously. In the second refrigerant circuit 200, the first refrigerant pump 201 is activated, driving the refrigerant to circulate. The refrigerant flows through the first power module 202, absorbing the waste heat generated during the operation of the first power module 202, thus increasing its temperature. The refrigerant flowing through the first refrigerant channel 310 can transfer heat to the low-temperature refrigerant in the second refrigerant channel 320.

[0036] In the first refrigerant circuit 100, the high-temperature, high-pressure gaseous refrigerant discharged from the compressor 101 flows into the battery module 102 after passing through the four-way reversing valve 103. At the battery module 102, it condenses and releases heat to heat the module, transforming into a liquid refrigerant. This liquid refrigerant is then throttled by the expansion valve 104 and flows into the second refrigerant channel 320 via the valve assembly 500. In the second refrigerant channel 320, the refrigerant absorbs heat through evaporation from the refrigerant in the first refrigerant channel 310 and also absorbs heat from the ambient air. Subsequently, the refrigerant flows through the third refrigerant channel 410, continuing to absorb heat from the ambient air, and finally returns to the compressor 101 via the four-way reversing valve 103. In this mode, the evaporation-side heat source of the first refrigerant circuit 100 comes from the ambient air and the first power module 202 (dual-source heat pump mode).

[0037] The valve assembly 500 controls the on / off state of the first refrigerant circuit 100 and the second refrigerant channel 320, enabling flexible switching between multiple modes. In single heat source mode, the system utilizes ambient air as the evaporator-side heat source to heat the battery module 102, resulting in a simple structure and convenient control. In dual heat source mode, while utilizing ambient air as a heat source, the system can also introduce waste heat generated during the operation of the first power module 202 into the evaporator side of the first refrigerant circuit 100, allowing the evaporator side to simultaneously receive heat from both the air source and the power module's waste heat, thus improving the energy efficiency ratio in heat pump mode. This solution eliminates the need for an additional independent heat source recovery device; waste heat utilization can be achieved solely through the on / off control of the valve assembly 500. It improves system energy efficiency while controlling cost and integration, solving the problem of simultaneously utilizing both air source and power module waste heat as evaporator-side heat sources in heat pump mode.

[0038] In some embodiments, the housing of the first heat exchanger 300 has a first refrigerant flow channel 310 and a second refrigerant flow channel 320 formed inside, and the housing is made of a thermally conductive material. The first heat exchange section 330 can be a fan, which forces the external air to flow and exchange heat with the housing surface forming the first and second refrigerant flow channels 310 and 320, thereby achieving heat exchange between the external air and the medium in the flow channels. To enhance the heat exchange effect on the air side, heat dissipation fins can be provided on the outer surface of the housing to increase the heat exchange area.

[0039] The structure of the second heat exchange section 420 is the same as that of the first heat exchange section 330, and will not be described again here.

[0040] Please see Figure 2 , Figure 3 and Figure 4In some embodiments, a second power module 203 is also provided on the second refrigerant circuit 200. The second power module 203 has similar thermal characteristics to the first power module 202 and also generates waste heat during operation, which needs to be dissipated through refrigerant circulation. By placing the second power module 203 on the second refrigerant circuit 200, the refrigerant driven by the first refrigerant pump 201 can simultaneously or selectively cool both the first power module 202 and the second power module 203. The second power module 203 can be connected in series or in parallel on the second refrigerant circuit 200.

[0041] By adding a second power module 203 to the second refrigerant circuit 200, the thermal management system can simultaneously manage the heat dissipation needs of multiple power modules, improving the system's integration and applicability. Especially for applications such as energy storage systems or integrated energy storage and charging units that contain multiple power modules, this setup enables integrated thermal management of multiple heat sources without adding independent heat dissipation circuits.

[0042] Please see Figure 3 In some embodiments, a second power module 203 is also provided on the circuit connecting the second refrigerant channel 320 and the valve assembly 500. When the second refrigerant circuit 200 and the second refrigerant channel 320 are connected in series, the first refrigerant pump 201 drives the refrigerant to flow through the second refrigerant channel 320, the second power module 203, the first power module 202, and the first refrigerant channel 310. The refrigerant flows through the second power module 203, absorbing the waste heat generated during its operation, and its temperature rises. The refrigerant flows through the first power module 202, absorbing its waste heat, and its temperature rises further. The refrigerant flows through the first refrigerant channel 310, exchanging heat with the outside air, and the refrigerant cools down. This connection state is suitable for scenarios where two power modules operate simultaneously and both need to dissipate heat through the air side, in which case the waste heat generated by both power modules is discharged into the environment.

[0043] In some embodiments, the second power module 203 may be a power conversion module, such as an energy storage converter. The first power module 202 may be a charging module, and the two are connected in parallel. Please refer to [link to relevant documentation]. Figure 6 When the first refrigerant circuit 100 and the second refrigerant channel 320 are connected in series, the first refrigerant pump 201 drives the refrigerant to flow through the first power module 202 and the first refrigerant channel 310. In this connected state, the refrigerant in the second refrigerant circuit 200 exchanges heat with the ambient air as it flows through the first refrigerant channel 310, causing its temperature to decrease. (See also...) Figure 7 When the first refrigerant circuit 100 and the second refrigerant channel 320 are connected in series, the first refrigerant pump 201 drives the refrigerant to flow through the second power module 203 and the first refrigerant channel 310. In this connected state, the refrigerant in the second refrigerant circuit 200 exchanges heat with the external ambient air as it flows through the first refrigerant channel 310, and its temperature decreases.

[0044] When battery module 102 does not require heating, the waste heat from both power modules dissipates to the ambient air, achieving normal heat dissipation. When battery module 102 requires heating, one of the first power module 202 and the second power module 203 can maintain air-side heat dissipation, while the waste heat from the other is recovered for heating battery module 102. Alternatively, the waste heat from both the first power module 202 and the second power module 203 can be recovered for heating battery module 102.

[0045] For example, in the scenario of an integrated energy storage and charging device, the first power module 202 can be a charging module, and the second power module 203 can be an energy storage converter. Since the charging module operates independently of the energy storage battery and the energy storage converter, that is, when the energy storage battery needs to be heated, the energy storage converter does not work (except for the energy storage converter generating reactive heat). Therefore, focusing on the energy storage and charging scenario, the charging module has heat recovery characteristics.

[0046] Please see Figure 4 As shown, in some embodiments, the second refrigerant circuit 200 includes a main circuit 210 and a first branch circuit 220, with the first branch circuit 220 connected in parallel to the main circuit 210; the main circuit 210 is connected to the valve assembly 500; a first power module 202 is disposed on the main circuit 210; a second power module 203 is disposed on the first branch circuit 220; and the second power module 203 is connected in parallel with the first power module 202.

[0047] It is understandable that one or more valves can be installed on the second refrigerant circuit 200 to control the connection between the main circuit 210 and the first branch circuit 220.

[0048] In some embodiments, a first valve 211 is provided on the main circuit 210, and a second valve 221 is provided on the first branch circuit 220, with the first valve 211 and the second valve 221 connected in parallel. Specifically, the first valve 211 and the second valve 221 can be solenoid valves, shut-off valves, or other valves with on / off control functions. By setting the first branch circuit 220 and the main circuit 210 in parallel, and providing the first valve 211 and the second valve 221 on each branch circuit respectively, the system can independently control the flow of refrigerant through each power module according to the operating status of the first power module 202 and the second power module 203. The above configuration can reduce the ineffective power consumption of the first refrigerant pump 201 when some power modules are working, ensure balanced heat dissipation when multiple power modules are working simultaneously, and improve overall energy efficiency by utilizing the hardware reuse of the first heat exchanger 300 between the two circuits.

[0049] Please see Figure 7As shown, in compression mode, only the second power module 203 (power conversion module) works, while the first power module 202 (charging module) does not work. The first refrigerant pump 201 (refrigerant pump) is turned on, the compressor 101 is turned on, the expansion valve 104 is turned on, the second valve 221 is turned on, and the first valve 211 is turned off.

[0050] In the second refrigerant circuit 200, the first refrigerant pump 201 drives the refrigerant to flow through the second power module 203, absorbing the waste heat generated during the operation of the second power module 203. The refrigerant then flows through the first refrigerant channel 310, exchanging heat with the ambient air, thus cooling down. In the first refrigerant circuit 100, the high-temperature, high-pressure gaseous refrigerant discharged from the compressor 101 flows through the four-way reversing valve 103, through the third refrigerant channel 410 and the second refrigerant channel 320, exchanging heat with the ambient air. The refrigerant condenses and releases heat, transforming into a high-temperature, high-pressure liquid refrigerant. This liquid refrigerant is then throttled by the expansion valve 104, becoming a low-temperature, low-pressure refrigerant, which flows into the battery module 102. There, it evaporates and absorbs heat to cool the battery module 102, transforming into a gaseous refrigerant, which finally returns to the compressor 101 via the four-way reversing valve 103. The refrigerant only cools the second power module 203, which is in operation and requires heat dissipation. This reduces unnecessary flow and pressure loss of the refrigerant in the non-operating power modules, thereby reducing the energy consumption of the first refrigerant pump 201 and improving the system's operating efficiency under partial load conditions. Through the control of the valve assembly 500, the system ensures that the high-temperature, high-pressure gaseous refrigerant in the first refrigerant circuit 100, after condensing in the third refrigerant channel 410, further flows through the second refrigerant channel 320, utilizing the idle heat exchange capacity of the first heat exchanger 300 to continue releasing heat to the ambient air. This process increases the condensation area of ​​the refrigerant in the first refrigerant circuit 100, reduces the condensation temperature and pressure, thereby reducing the power consumption of the compressor 101 and improving the system's energy efficiency ratio.

[0051] Under intermediate ambient temperature conditions, the fan corresponding to the second heat exchanger 400 can even be shut down, allowing the condensation and heat release of the refrigerant in the first refrigerant circuit 100 to be completed entirely through the first heat exchanger 300. In this state, the first heat exchanger 300 simultaneously undertakes the dual tasks of cooling the power module in the second refrigerant circuit 200 and condensing the refrigerant in the first refrigerant circuit 100. This achieves coordinated operation of the same heat exchanger in two independent circuits and maximizes the utilization of hardware resources, solving the problem of increased volume and cost associated with configuring a separate large-capacity heat exchanger for the first refrigerant circuit 100.

[0052] In some scenarios, especially under low compression load conditions, the first refrigerant circuit 100 can dissipate heat solely through the second heat exchanger 400. The first heat exchanger 300 in this application employs a three-channel heat exchanger, which has two refrigerant channels and a fan. Two sets of fins are provided on the outer side of the housing forming the two refrigerant channels, with one set of fins corresponding to each refrigerant channel. When only one refrigerant channel is operating, the fins of the other refrigerant channel can also provide heat exchange to the operating refrigerant channel side, allowing more air to exchange heat with one refrigerant channel, thereby superimposing the heat exchange effect.

[0053] Please see Figure 8 As shown, in another compression mode, both the first power module 202 (charging module) and the second power module 203 (power conversion module) are operational. The first refrigerant pump 201 is turned on, the compressor 101 is turned on, the expansion valve 104 is turned on, the second valve 221 is turned on, and the first valve 211 is turned on.

[0054] In the second refrigerant circuit 200, the first refrigerant pump 201 drives the refrigerant to split into two paths: one path flows through the first power module 202 to absorb its waste heat, and the other path flows through the second power module 203 to absorb its waste heat. After the two refrigerant paths merge, they flow through the second refrigerant channel 320 and the first refrigerant channel 310, exchanging heat with the external ambient air, thus cooling the refrigerant.

[0055] In the first refrigerant circuit 100, the high-temperature, high-pressure gaseous refrigerant discharged from the compressor 101 flows through the three-way reversing valve 103 and then through the third refrigerant channel 410. At the second heat exchanger 400, it condenses and releases heat to the ambient air, transforming into a high-temperature, high-pressure liquid refrigerant. This liquid refrigerant is then throttled by the expansion valve 104, becoming a low-temperature, low-pressure refrigerant. It flows into the battery module 102, where it evaporates and absorbs heat to cool the module. The refrigerant then transforms into a gaseous refrigerant and finally returns to the compressor 101 via the four-way reversing valve 103.

[0056] By providing independent refrigerant flow to each of the two power modules, the impact of the exhaust temperature of the upstream power module on the heat dissipation of the downstream power module in a series arrangement is reduced, resulting in more uniform heat dissipation when both power modules are operating simultaneously. Furthermore, the parallel design of the two power modules reduces the flow path length and refrigerant pump pressure when each power module operates independently.

[0057] Please see Figure 9As shown, in some embodiments, the first refrigerant circuit 100 further includes a four-way reversing valve 103 and an expansion valve 104; the thermal management system further includes a first bypass passage 110, a second bypass passage 120, and a sixth valve 105. One end of the first bypass passage 110 is connected to the inlet end of the four-way reversing valve 103, and the other end of the first bypass passage 110 is connected to the outlet end of the four-way reversing valve 103. The first bypass passage 110 is used to bypass the compressor 101 when the compressor 101 is stopped, so that the refrigerant in the first refrigerant circuit 100 flows around the compressor 101. A fourth valve 111 is provided on the first bypass passage 110. One end of the second bypass passage 120 is connected to the inlet end of the expansion valve 104, and the other end of the second bypass passage 120 is connected to the outlet end of the expansion valve 104. The second bypass passage 120 is used to bypass the expansion valve 104 when the compressor 101 is stopped, so that the refrigerant in the first refrigerant circuit 100 flows around the expansion valve 104. A fifth valve 121 is provided on the second bypass passage 120. A sixth valve 105 is provided on the first refrigerant circuit 100 and is connected in parallel with the first bypass passage 110.

[0058] When the fourth valve 111 is open, the sixth valve 105 is closed, the expansion valve 104 is closed, and the fifth valve 121 is open, the system operates in natural cooling mode. The refrigerant in the first refrigerant circuit 100 does not flow through the throttling channels of the four-way reversing valve 103, compressor 101, and expansion valve 104; that is, the four-way reversing valve 103, compressor 101, and expansion valve 104 are bypassed. The valve assembly 500 controls the first refrigerant circuit 100, the second refrigerant circuit 200, and the second refrigerant flow channel 320 to be connected in series. The first refrigerant pump 201 drives the refrigerant to flow through the first power module 202, the second power module 203, the valve assembly 500, the battery module 102, the third refrigerant flow channel 410, the second refrigerant flow channel 320, and the first refrigerant flow channel 310. This mode enables the first refrigerant pump 201 to simultaneously provide cooling circulation for both the battery module 102 and the power module when the compressor 101 is not operating. As the refrigerant flows through the third refrigerant channel 410, the second refrigerant channel 320, and the first refrigerant channel 310, it exchanges heat with the ambient air to release heat from the battery module 102, the first power module 202, and the second power module 203 to the external environment, or to recover heat from the first power module 202 and the second power module 203 to heat the battery module 102. When the ambient temperature is low or the system heat load is small, the cooling requirements can be met without starting the compressor 101, thus reducing system energy consumption.

[0059] In some embodiments, the sixth valve 105, the fourth valve 111, and the fifth valve 121 may be replaced by a valve assembly for selectively controlling the first refrigerant pump 201 or the compressor 101 to provide circulating power for the refrigerant in the first refrigerant circuit 100.

[0060] Please see Figure 10 As shown, in some embodiments, the thermal management system further includes a third bypass passage 130, an eighth valve 106, and a heating element 132. One end of the third bypass passage 130 is connected to the inlet end of the third refrigerant flow channel 410, and the other end of the third bypass passage 130 is connected to the outlet end of the third refrigerant flow channel 410. The third bypass passage 130 is used to bypass the second heat exchanger 400, so that the refrigerant in the first refrigerant circuit 100 flows around the third refrigerant flow channel 410. A seventh valve 131 is provided on the third bypass passage 130. The eighth valve 106 is provided on the first refrigerant circuit 100 and is arranged in parallel with the third bypass passage 130. The heating element 132 is provided on the third bypass passage 130. When the eighth valve 106 is open and the seventh valve 131 is closed, the refrigerant flows through the third refrigerant flow channel 410 and exchanges heat with the external ambient air. When the eighth valve 106 is closed and the seventh valve 131 is open, the refrigerant flows through the third bypass passage 130 and is heated by the heating element 132. When the ambient temperature is too low and the refrigerant flowing through the third refrigerant channel 410 cannot obtain sufficient heat from the outside air, the heating element 132 provides an independent heat source for the refrigerant in the first refrigerant circuit 100. This setting ensures that the heat pump mode can still provide heating capacity for the battery module 102 under extreme low temperature conditions, widening the environmental adaptability temperature range of the system and benefiting the size and cost of the control system.

[0061] In some embodiments, the seventh valve 131 and the eighth valve 106 can be replaced by a valve assembly, as long as the valve assembly can selectively control the refrigerant flow through the heating element 132 or the third refrigerant flow channel 410.

[0062] Please see Figure 10 As shown, in some embodiments, the second refrigerant circuit 200 further includes a second branch 230, which is connected in parallel with the main circuit 210 and the first branch 220. One end of the second branch 230 is connected to the inlet of the first refrigerant pump 201, and the other end is connected to the valve assembly 500. A third valve 231 is provided on the second branch 230. Combined with the aforementioned third bypass passage 130 and heating element 132, in the low-temperature heating mode, the eighth valve 106 is closed, the seventh valve 131 is open, the sixth valve 105 is closed, the fourth valve 111 is open, the fifth valve 121 is open, the expansion valve 104 is closed, the first valve 211 and the second valve 221 are closed, and the third valve 231 is open. The valve assembly 500 controls the first refrigerant circuit 100, the second refrigerant circuit 200, and the second refrigerant flow channel 320 to be connected in series. The first refrigerant pump 201 drives the refrigerant to flow through the second branch 230, the second bypass passage 120, the battery module 102, the first bypass passage 110, the third bypass passage 130, and the second refrigerant flow channel 320. The refrigerant is heated by the heating element 132 when it flows through the third bypass passage 130.

[0063] In low-temperature heating mode, by closing the first valve 211 and the second valve 221 and opening the third valve 231, the refrigerant driven by the first refrigerant pump 201 flows through the second branch 230. Simultaneously, the compressor 101 and the expansion valve 104 are shut down. This mode is particularly suitable for battery preheating or insulation in extremely low-temperature environments, where there is insufficient air heat source and the charging module is not operating. Insulation of the energy storage system requires the use of the heating element 132. Since the first valve 211 and the second valve 221 are closed, the refrigerant does not flow through the power module branch, and all the heat from the heating element 132 is used to heat the battery module 102, improving heating efficiency.

[0064] Please see Figure 11 As shown, the thermal management system also includes a fourth bypass passage 140, a ninth valve 141, and a tenth valve 142. One end of the fourth bypass passage 140 is connected to the inlet of the first refrigerant flow channel 310, and the other end is connected to the outlet of the first refrigerant flow channel 310. The fourth bypass passage 140 is used to bypass the first refrigerant flow channel 310, so that the refrigerant in the second refrigerant circuit 200 flows around the first refrigerant flow channel 310. The ninth valve 141 is disposed on the fourth bypass passage 140. The tenth valve 142 is disposed on the main circuit 210 and is disposed in parallel with the fourth bypass passage 140. In the low-temperature heating mode, by closing the tenth valve 142 and opening the ninth valve 141, the refrigerant driven by the first refrigerant pump 201 flows through the fourth bypass passage 140, and the refrigerant does not flow through the first refrigerant flow channel 310, thereby preventing heat exchange with the outside air. At this time, the refrigerant no longer exchanges heat with the external ambient air. When the refrigerant flows through the first heat exchanger 300 in a low-temperature environment, it will not dissipate the heat it carries to the outside environment, thereby reducing heat loss along the way. This allows the heat generated by the heating element 132 and the waste heat generated by the power module to be retained and transferred to the battery module 102 to the maximum extent, thus improving the heat utilization efficiency in the low-temperature heating mode.

[0065] Meanwhile, since the refrigerant no longer flows through the first refrigerant channel 310, the flow path of the system is shortened and the friction resistance is reduced. The first fluorine pump 201 can provide a larger circulation flow rate at the same speed, or the operating power of the first fluorine pump 201 can be reduced under the same flow rate requirement, thereby reducing pump power loss and further improving the overall energy efficiency of the system under low temperature conditions.

[0066] Under conditions where the ambient temperature is high and heating of the battery module 102 is not required, the refrigerant can flow normally through the first refrigerant channel 310 by closing the ninth valve 141 and opening the tenth valve 142, allowing heat exchange with the outside air and achieving normal heat dissipation of the power module. Please refer to [link / reference]. Figure 12As shown, in some embodiments, the thermal management system further includes a heating element 132, which is disposed on the second bypass passage 120. This arrangement shortens the flow path of the refrigerant in the low-temperature heating mode. Since the heating element 132 is directly disposed on the second bypass passage 120, the refrigerant does not need to flow through the third bypass passage 130, resulting in a more compact flow path and reduced flow resistance. Simultaneously, it simplifies the structural layout of the bypass pipeline. Integrating the heating element 132 into the second bypass passage 120 eliminates the need for a separate third bypass passage 130 and a seventh valve 131 for the heating element 132, reducing the number of pipeline connection points, welded joints, and valves, lowering system complexity and manufacturing costs, and also reducing potential leakage points, improving the system's sealing reliability and long-term operational stability. This also facilitates faster heat transfer from the heating element 132 to the battery module 102. In low-temperature heating mode, the refrigerant is heated by the heating element 132 and then flows directly to the battery module 102. This results in the shortest path, the least heat loss, and a faster heating response, enabling the battery module 102 to be heated to the appropriate operating temperature more quickly.

[0067] Please see Figure 13 As shown, in some embodiments, a second refrigerant pump 112 is also provided on the second bypass passage 120. Under low-temperature conditions, the flow resistance inside the system pipelines and heat exchangers increases accordingly. Relying solely on the first refrigerant pump 201 may be insufficient to maintain a sufficient refrigerant circulation flow, resulting in the heat generated by the heating element 132 not being transferred to the battery module 102 in a timely and sufficient manner. The introduction of the second refrigerant pump 112 provides auxiliary power for the refrigerant circulation, forming a series pressurization with the first refrigerant pump 201 to overcome the flow resistance at low temperatures, ensuring stable circulation of the refrigerant and heat transfer efficiency in the series circuit. At the same time, it improves the system's heating capacity and response speed under extreme low-temperature conditions. In addition, in low-temperature heating mode or air-cooling mode, the second refrigerant pump 112 provides circulation power for the refrigerant in the first refrigerant circuit 100. The pressurization effect of the second refrigerant pump 112 allows the refrigerant to flow through the heating element 132 and the battery module 102 at a higher flow rate. This enhances convective heat transfer between the surface of the heating element 132 and the refrigerant, improving the heat transfer efficiency of the heating element 132. Furthermore, it shortens the time it takes for the refrigerant to carry heat to the battery module 102, enabling the battery module 102 to heat up more quickly. Please refer to [link / reference]. Figure 14As shown, in some embodiments, a second refrigerant pump 112 is also provided on the first bypass passage 110. By providing the second refrigerant pump 112 on the first bypass passage 110, when the fourth valve 111 is open and the sixth valve 105 is closed, connecting the first bypass passage 110, the second refrigerant pump 112 is connected in series with the first bypass passage 110 to the first refrigerant circuit 100. In the low-temperature heating mode, the first refrigerant pump 201 drives the refrigerant to circulate, while the second refrigerant pump 112 is turned on, providing additional circulation power for the refrigerant in the first refrigerant circuit 100. Due to the increased viscosity and flow resistance of the refrigerant in low-temperature environments, it may be difficult to ensure sufficient refrigerant flow rate by relying solely on the first refrigerant pump 201. The introduction of the second refrigerant pump 112 enhances the circulation driving force of the refrigerant in the series circuit, ensuring that the refrigerant flows through the second refrigerant channel 320, the third bypass passage 130, the first bypass passage 110, and the battery module 102, ensuring that the heat generated by the heating element 132 can be effectively transferred to the battery module 102.

[0068] In some embodiments, when the first fluorine pump 201 and the second fluorine pump 112 are present simultaneously, if one of them fails, the other can still maintain the basic cycle of its circuit, thereby improving the redundancy and reliability of the system.

[0069] Please see Figure 15 As shown, in some embodiments, the second refrigerant circuit 200 includes a first circuit 240 and a second circuit 250. Both the first circuit 240 and the second circuit 250 are connected to the valve assembly 500. The first circuit 240 is equipped with a first power module 202 and a second power module 203, and the second circuit 250 is equipped with a first refrigerant pump 201. By controlling the on / off state of the valve assembly 500, the first circuit 240 and the second circuit 250 can be connected in series or operate independently. When the system operates in dual heat source mode, the valve assembly 500 connects the first refrigerant circuit 100 and the second refrigerant flow channel 320, and simultaneously connects the first circuit 240 and the second circuit 250 in series. This arrangement allows the circulating power provided by the first refrigerant pump 201 to simultaneously serve the first circuit 240 and the second circuit 250, eliminating the need for a separate drive unit for each power module and reducing the number of system components. Meanwhile, the first power module 202 and the second power module 203 are connected in series or in parallel on the first circuit 240. The refrigerant flows through the two power modules to absorb waste heat, which helps to increase the temperature rise of the refrigerant. Thus, in the dual heat source mode, a higher temperature heat source is provided to the first refrigerant circuit 100, thereby improving the energy efficiency of the heat pump system.

[0070] Furthermore, the division between the first circuit 240 and the second circuit 250 allows the system to flexibly select the circuits participating in the circulation based on operating conditions. For example, in low-temperature heating mode, when heat dissipation of the power module is not required, the valve assembly 500 can control the connection between only the second circuit 250 and the first refrigerant circuit 100, allowing the first refrigerant pump 201 to drive the refrigerant circulation in the first refrigerant circuit 100 independently, without introducing refrigerant into the first circuit 240 where the power module is located. This arrangement reduces heat loss and flow resistance generated when the refrigerant flows through the power module, ensuring that all the heat generated by the heating element 132 is used to heat the battery module 102, improving heating efficiency in low-temperature heating mode, and simultaneously reducing the power consumption of the first refrigerant pump 201.

[0071] Please see Figure 16 As shown, in some embodiments, the thermal management system includes an integrated module 10, which integrates an expansion valve 104 and a valve assembly 500. The integrated module 10 may also integrate a fourth valve 111, a fifth valve 121, a sixth valve 105, a seventh valve 131, and an eighth valve 106. This arrangement achieves a structurally integrated layout of multiple fluid control elements, reducing the number of connecting pipes and joints between valve bodies and lowering the friction loss and leakage risk of the refrigerant during transmission. The integration of valve bodies helps reduce the overall size and weight of the thermal management system and increases the system's power density. The integrated module 10 can be pre-assembled and tested as an independent standard component, simplifying the system assembly process and improving production efficiency and maintenance convenience.

[0072] Please see Figure 17 As shown, in some embodiments, the thermal management system further includes a heat exchanger assembly 20 and a refrigerant pipe assembly 30. The heat exchanger assembly 20 includes at least one first heat exchanger 300 and at least one second heat exchanger 400. The first refrigerant flow channel 310 and the second refrigerant flow channel 320 of the at least one first heat exchanger 300 are both connected to the refrigerant pipe assembly 30, and the third refrigerant flow channel 410 of the at least one second heat exchanger 400 is connected to the refrigerant pipe assembly 30. There are multiple integrated modules 10, which are connected in parallel to the refrigerant pipe assembly 30. Specifically, the first power module 202, the second power module 203, and the battery module 102 are all connected to the refrigerant pipe assembly 30 through their respective pipes. Each integrated module 10 is connected to a compressor 101. By setting up the refrigerant pipe group 30 as a common refrigerant distribution and collection hub, and connecting multiple integrated modules 10 in parallel to the refrigerant pipe group 30, and also connecting the first heat exchanger 300 and the second heat exchanger 400 in the heat exchanger group 20 to the refrigerant pipe group 30, a modular parallel layout suitable for large-scale energy storage systems or distributed thermal management scenarios is formed.

[0073] The above configuration enables flexible expansion of system capacity. Based on actual heat dissipation requirements and the number of managed devices, an appropriate number of integrated modules 10 can be connected in parallel to the refrigerant piping group 30. Each integrated module 10 independently controls its connected compressor 101 and valves. Multiple modules work collaboratively to meet the thermal management needs of systems of different sizes, eliminating the need to redesign the entire thermal management system for each project. Simultaneously, it improves system redundancy and reliability. When one integrated module 10 or its connected compressor 101 fails, the remaining integrated modules 10 can continue to operate, maintaining basic heat dissipation or heating capacity, preventing a single point of failure from paralyzing the entire thermal management system and enhancing system operational reliability.

[0074] The above configuration also optimizes the refrigerant distribution path in large systems. By uniformly connecting the parallel modules and multiple heat exchangers in the heat exchanger assembly 20 through the refrigerant pipe assembly 30, each integrated module 10 shares the same heat exchanger assembly 20. The heat or cooling generated by multiple modules can be collected through the refrigerant pipe assembly 30 and centrally dissipated or extracted from the heat exchanger assembly 20, eliminating the need for a separate heat exchanger for each integrated module 10, thus reducing size and cost. Each integrated module 10, heat exchanger assembly 20, power module, and battery module 102 are all connected to standard interfaces on the refrigerant pipe assembly 30 via piping. During on-site construction, only the connection between the module and the refrigerant pipe assembly 30 needs to be completed, reducing the workload of on-site welding and piping. This also facilitates subsequent maintenance or replacement of individual integrated modules 10 without affecting the overall system piping structure.

[0075] In some embodiments, the integration module 10 may also integrate the compressor 101.

[0076] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0077] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0078] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A thermal management system, characterized in that, include: A first refrigerant circuit (100) includes a compressor (101) and a battery module (102) is provided on the first refrigerant circuit (100). The second refrigerant circuit (200) includes a first fluorine pump (201) and a first power module (202) is provided on the second refrigerant circuit (200). The first heat exchanger (300) includes a first refrigerant channel (310), a second refrigerant channel (320), and a first heat exchange section (330). The first heat exchange section (330) is used to exchange heat between the external medium and the medium in the first refrigerant channel (310) and the second refrigerant channel (320). The first refrigerant channel (310) is connected in series with the second refrigerant circuit (200). The second heat exchanger (400) has a third refrigerant channel (410) and a second heat exchange section (420) for mutual heat exchange. The second heat exchange section (420) is used to exchange heat between the external medium and the medium in the third refrigerant channel (410). The third refrigerant channel (410) is connected in series with the first refrigerant circuit (100). A valve assembly (500) is connected to the first refrigerant circuit (100) and the second refrigerant channel (320) respectively, and is used to control the opening and closing of the first refrigerant circuit (100) and the second refrigerant channel (320) to realize the switching between single-source heat pump mode and dual-source heat pump mode.

2. The thermal management system according to claim 1, characterized in that, The second refrigerant circuit (200) is also equipped with a second power module (203).

3. The thermal management system according to claim 1, characterized in that, A second power module (203) is also provided on the circuit connecting the second refrigerant flow channel (320) and the valve assembly (500).

4. The thermal management system according to claim 2, characterized in that, The second refrigerant circuit (200) includes a main circuit (210) and a first branch circuit (220), wherein the first branch circuit (220) is connected in parallel to the main circuit (210); The main road (210) is connected to the valve assembly (500), the first power module (202) is disposed on the main road (210), the second power module (203) is disposed on the first branch road (220), and the second power module (203) is connected in parallel with the first power module (202).

5. The thermal management system according to claim 4, characterized in that, The first refrigerant circuit (100) also includes a four-way reversing valve (103) and an expansion valve (104). The thermal management system also includes: A first bypass passage (110) is connected at one end to the inlet end of the four-way reversing valve (103), and at the other end to the outlet end of the four-way reversing valve (103). The second bypass passage (120) has one end connected to the inlet end of the expansion valve (104) and the other end connected to the outlet end of the expansion valve (104).

6. The thermal management system according to claim 5, characterized in that, The thermal management system also includes: The third bypass passage (130) has one end connected to the inlet end of the third refrigerant channel (410) and the other end connected to the outlet end of the third refrigerant channel (410). A heating element (132) is disposed on the third bypass passage (130).

7. The thermal management system according to claim 6, characterized in that, The second refrigerant circuit (200) also includes a second branch (230), which is connected in parallel with the main circuit (210) and the first branch (220). One end of the second branch (230) is connected to the inlet end of the first fluorine pump (201), and the other end of the second branch (230) is connected to the valve assembly (500).

8. The thermal management system according to claim 4, characterized in that, The thermal management system also includes: A fourth bypass passage (140) is provided, one end of which is connected to the inlet of the first refrigerant channel (310), and the other end of which is connected to the outlet of the first refrigerant channel (310).

9. The thermal management system according to claim 5, characterized in that, The thermal management system further includes a heating element (132) disposed on the second bypass passage (120).

10. The thermal management system according to claim 9, characterized in that, A second fluorine pump (112) is also provided on the second bypass passage (120).

11. The thermal management system according to claim 6 or 7, characterized in that, A second fluorine pump (112) is also provided on the first bypass passage (110).

12. The thermal management system according to claim 6, characterized in that, The second refrigerant circuit (200) includes a first circuit (240) and a second circuit (250). Both the first circuit (240) and the second circuit (250) are connected to the valve assembly (500). The first circuit (240) is provided with a first power module (202) and a second power module (203), and the second circuit (250) is provided with a first fluorine pump (201).

13. The thermal management system according to claim 12, characterized in that, The thermal management system includes an integrated module (10) which integrates the expansion valve (104) and the valve assembly (500).

14. The thermal management system according to claim 13, characterized in that, The thermal management system further includes a heat exchanger assembly (20) and a refrigerant pipe assembly (30), wherein the heat exchanger assembly (20) includes at least one first heat exchanger (300) and at least one second heat exchanger (400). At least one of the first heat exchanger (300) has its first refrigerant flow channel (310) and second refrigerant flow channel (320) connected to the refrigerant pipe assembly (30), and at least one of the second heat exchanger (400) has its third refrigerant flow channel (410) connected to the refrigerant pipe assembly (30). The number of integrated modules (10) is multiple, and the multiple integrated modules (10) are connected in parallel to the refrigerant pipe group (30).

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