An indirect thermal management system based on hot water recirculation

Abstract

The utility model belongs to the field of heat management technology discloses an indirect heat management system based on hot water backflow, this heat management system includes compressor, high pressure water heat exchanger, low pressure water heat exchanger, PTC heater and first three -way valve, through increasing first three -way valve connecting pipeline between high pressure water heat exchanger and low pressure water heat exchanger, the working medium after PTC heater heating enters low pressure water heat exchanger through first three -way valve, thereby make the evaporation pressure of the working medium that enters compressor under extremely low temperature environment improve, avoid the forced shutdown of compressor due to the evaporation pressure below the protection threshold of compressor, make compressor still can keep the stability of operation in extremely low temperature environment. And, only through increasing first three -way valve and introducing the working medium after PTC heater heating into low pressure water heat exchanger, can realize the improvement of evaporation pressure, make the whole heat management system simple structure, low in cost, high stability.

Description

Technical Field

[0001] This utility model relates to the field of thermal management technology, and in particular to an indirect thermal management system based on hot water recirculation. Background Technology

[0002] In low-temperature environments, the refrigerant's evaporation temperature in the evaporator decreases, causing a sharp drop in evaporation pressure (i.e., compressor suction pressure). Once the evaporation pressure falls below the compressor's protection threshold, the compressor will be forced to shut down. Furthermore, excessively low evaporation pressure not only triggers compressor shutdown but also causes a chain reaction of heating capacity loss. In extremely cold regions, the loss of cabin heating may jeopardize passenger safety. If the refrigeration cycle fails to operate, the battery pack may experience a decrease in charging rate due to low temperatures, and frequent compressor starts and stops will shorten the compressor's lifespan.

[0003] Currently, electric auxiliary heating (PTC) heating is commonly used to alleviate this problem. However, adding a PTC heater to a low-pressure water heat exchanger or low-pressure pipeline directly increases the temperature of the working medium. While this increases the evaporation pressure, it consumes additional electrical energy, and simply supplementing heat at the low-pressure end reduces the heating rate. Furthermore, the use of cascade heat pumps in some high-end models increases system complexity and cost.

[0004] Therefore, there is an urgent need to propose an indirect thermal management system based on hot water recirculation to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an indirect thermal management system based on hot water recirculation to solve the problem of compressors being forced to shut down due to excessively low evaporation pressure in extremely low temperature environments, and to achieve the effect of simple structure, low cost and stable operation of the entire thermal management system.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An indirect thermal management system based on hot water recirculation includes:

[0008] The compressor, the high-pressure water heat exchanger, and the low-pressure water heat exchanger are connected. The outlet of the compressor is connected to the first inlet of the high-pressure water heat exchanger, the first outlet of the high-pressure water heat exchanger is connected to the first inlet of the low-pressure water heat exchanger, and the first outlet of the low-pressure water heat exchanger is connected to the inlet of the compressor.

[0009] The PTC heater has its inlet connected to the second outlet of the high-pressure water heat exchanger.

[0010] The first three-way valve has its outlet connected to the second inlet of the low-pressure water heat exchanger, its first inlet connected to the outlet of the PTC heater, and its second inlet connected to the second outlet of the low-pressure water heat exchanger.

[0011] As a preferred embodiment, the indirect heat management system based on hot water recirculation also includes a liquid storage tank, the inlet of which is connected to the first outlet of the high-pressure water heat exchanger, and the outlet of which is connected to the first inlet of the low-pressure water heat exchanger.

[0012] Preferably, the indirect heat management system based on hot water recirculation also includes an expansion valve, the inlet of which is connected to the outlet of the storage tank, and the outlet of which is connected to the first inlet of the low-pressure water heat exchanger.

[0013] As a preferred embodiment, the indirect thermal management system based on hot water recirculation also includes a cold core, the inlet of which is connected to the second outlet of the low-pressure water heat exchanger, and the outlet of which is connected to the second inlet of the first three-way valve.

[0014] As a preferred option, the indirect thermal management system based on hot water recirculation also includes a blower, which is positioned opposite to the cold core.

[0015] As a preferred embodiment, the indirect heat management system based on hot water recirculation also includes a heating core and a second three-way valve. The inlet of the heating core is connected to the outlet of the PTC heater, the outlet of the heating core is connected to the inlet of the second three-way valve, and the first outlet of the second three-way valve is connected to the second inlet of the high-pressure water heat exchanger.

[0016] As a preferred embodiment, the indirect thermal management system based on hot water recirculation also includes a low-temperature radiator, a cooling fan, and a ten-way valve. The inlet of the low-temperature radiator is connected to the second outlet of the second three-way valve through the ten-way valve, and the outlet of the low-temperature radiator is connected to the second inlet of the low-pressure water heat exchanger through the first three-way valve. The cooling fan is arranged opposite to the low-temperature radiator.

[0017] As a preferred embodiment, the indirect thermal management system based on hot water recirculation also includes a one-way valve, the outlet of which is connected to the first inlet of the first three-way valve.

[0018] As a preferred embodiment, the indirect thermal management system based on hot water recirculation also includes a motor assembly and a third three-way valve. The inlet of the motor assembly is connected to the outlet of the low-temperature radiator, the outlet of the motor assembly is connected to the first inlet of the third three-way valve, the outlet of the third three-way valve is connected to the ten-way valve, and the second inlet of the third three-way valve is connected to the outlet of the low-temperature radiator.

[0019] Preferably, the indirect thermal management system based on hot water recirculation also includes a battery assembly. The inlet of the battery assembly is connected to the second outlet of the high-pressure water heat exchanger via a ten-way valve, and the outlet of the battery assembly is connected to the second inlet of the low-pressure water heat exchanger via a ten-way valve.

[0020] The beneficial effects of this utility model are:

[0021] This invention provides an indirect thermal management system based on hot water recirculation, comprising a compressor, a high-pressure water heat exchanger, a low-pressure water heat exchanger, a PTC heater, and a first three-way valve. By adding a first three-way valve connecting pipeline between the high-pressure and low-pressure water heat exchangers, the working medium heated by the PTC heater enters the low-pressure water heat exchanger through the first three-way valve. This increases the evaporation pressure of the working medium entering the compressor in extremely low-temperature environments, preventing the compressor from being forcibly shut down due to the evaporation pressure falling below the compressor's protection threshold, thus ensuring the compressor maintains operational stability in extremely low-temperature environments. Furthermore, the entire thermal management system achieves an increase in the evaporation pressure on the low-pressure side of the compressor simply by adding a first three-way valve to introduce the working medium heated by the PTC heater into the low-pressure water heat exchanger, resulting in a simple structure, low cost, and high stability for the entire thermal management system. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the thermal management system provided in this embodiment;

[0023] Figure 2 This is a schematic diagram of the working principle of the heating mode of the thermal management system under extremely low temperature environment provided in this embodiment;

[0024] Figure 3 This is a schematic diagram illustrating the working principle of the heating mode of the thermal management system in a low-temperature environment provided in this embodiment.

[0025] Figure 4 This is a schematic diagram of the working principle of the thermal management system in cooling mode provided in this embodiment.

[0026] In the picture:

[0027] 101. Compressor; 102. High-pressure water heat exchanger; 103. Liquid receiver; 104. Low-pressure water heat exchanger; 105. PTC heater; 106. First three-way valve; 107. Expansion valve; 108. Cooling core; 109. Blower; 110. Warming core; 111. Second three-way valve; 112. Low-temperature radiator; 113. Cooling fan; 114. Ten-way valve; 115. Check valve; 116. Motor assembly; 117. Third three-way valve; 119. Battery assembly; 120. Cooling core water pump; 121. Electric water pump; 122. Battery water pump; 123. Fourth three-way valve. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not the entire structure.

[0029] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0032] This embodiment provides an indirect thermal management system based on hot water recirculation to solve the problem of compressors being forced to shut down due to excessively low evaporation pressure in extremely low temperature environments, and achieves the effect of simple structure, low cost and stable operation of the entire thermal management system.

[0033] Specifically, such as Figure 1As shown, an indirect thermal management system based on hot water recirculation includes a compressor 101, a high-pressure water heat exchanger 102, a low-pressure water heat exchanger 104, a PTC heater 105, and a first three-way valve 106. The outlet of the compressor 101 is connected to the first inlet of the high-pressure water heat exchanger 102, the first outlet of the high-pressure water heat exchanger 102 is connected to the first inlet of the low-pressure water heat exchanger 104, and the first outlet of the low-pressure water heat exchanger 104 is connected to the inlet of the compressor 101. The inlet of the PTC heater 105 is connected to the second outlet of the high-pressure water heat exchanger 102. The outlet of the first three-way valve 106 is connected to the second inlet of the low-pressure water heat exchanger 104, the first inlet of the first three-way valve 106 is connected to the outlet of the PTC heater 105, and the second inlet of the first three-way valve 106 is connected to the second outlet of the low-pressure water heat exchanger 104.

[0034] By adding a first three-way valve 106 connecting pipeline between the high-pressure water heat exchanger 102 and the low-pressure water heat exchanger 104, the working medium heated by the PTC heater 105 enters the low-pressure water heat exchanger 104 through the first three-way valve 106. This increases the evaporation pressure of the working medium entering the compressor 101 in extremely low-temperature environments, preventing the compressor 101 from being forcibly shut down due to the evaporation pressure falling below the protection threshold, thus ensuring the compressor 101 maintains operational stability in extremely low-temperature environments. Furthermore, in the entire thermal management system, simply adding the first three-way valve 106 to introduce the working medium heated by the PTC heater 105 into the low-pressure water heat exchanger 104 achieves the increase of the evaporation pressure on the low-pressure side of the compressor 101, resulting in a simple structure, low cost, and high stability for the entire thermal management system. It should be noted that the low-pressure water heat exchanger 104 refers to the heat exchanger located on the low-pressure side of the compressor 101, and the high-pressure water heat exchanger 102 refers to the heat exchanger located on the high-pressure side of the compressor 101.

[0035] Furthermore, the indirect thermal management system based on hot water recirculation also includes a liquid storage tank 103. The inlet of the liquid storage tank 103 is connected to the first outlet of the high-pressure water heat exchanger 102, and the outlet of the liquid storage tank 103 is connected to the first inlet of the low-pressure water heat exchanger 104. The liquid storage tank 103 stores and replenishes the working medium (such as coolant or refrigerant), and also serves to buffer pressure, separate gas and liquid, and exhaust gas, ensuring the stable operation of the thermal management system.

[0036] Furthermore, the indirect thermal management system based on hot water recirculation also includes an expansion valve 107. The inlet of the expansion valve 107 is connected to the outlet of the liquid storage tank 103, and the outlet of the expansion valve 107 is connected to the first inlet of the low-pressure water heat exchanger 104. During the basic circulation of the working medium, the expansion valve 107 throttles and reduces the pressure, causing the working medium to change from a liquid state to a gas-liquid mixture state, thereby achieving efficient heat exchange with water in the low-pressure water heat exchanger 104 and thus realizing refrigeration.

[0037] Optionally, the indirect thermal management system based on hot water recirculation also includes a cold core 108. The inlet of the cold core 108 is connected to the second outlet of the low-pressure water heat exchanger 104, and the outlet of the cold core 108 is connected to the second inlet of the first three-way valve 106. Through heat exchange between the low-temperature medium (such as coolant) in the internal flow channel of the cold core 108 and the external high-temperature fluid (such as air), heat is absorbed to reduce the fluid temperature and achieve heat dissipation or cooling function.

[0038] Furthermore, the indirect thermal management system based on hot water recirculation also includes a cold core water pump 120. The inlet of the cold core water pump 120 is connected to the outlet of the cold core 108, and the outlet of the cold core water pump 120 is connected to the second inlet of the first three-way valve 106. The cold core water pump 120 provides power to drive the flow of the working medium, ensuring that the working medium after heat exchange in the cold core 108 enters the first three-way valve 106 with a stable flow rate and pressure, thereby realizing the distribution control and circulation power maintenance of the working medium in the subsequent pipeline.

[0039] Furthermore, the indirect thermal management system based on hot water recirculation also includes a blower 109, which forces air flow to accelerate the heat exchange between the air and the cold core 108, improves the refrigeration efficiency, regulates the temperature of the working medium in the thermal management system, and thus achieves the regulation of the evaporation pressure.

[0040] Optionally, the indirect thermal management system based on hot water recirculation also includes a heating core 110 and a second three-way valve 111. The inlet of the heating core 110 is connected to the outlet of the PTC heater 105, and the outlet of the heating core 110 is connected to the inlet of the second three-way valve 111. The first outlet of the second three-way valve 111 is connected to the second inlet of the high-pressure water heat exchanger 102. Heat is released by the high-temperature working medium (such as coolant) inside the heating core 110 exchanging heat with the air to meet the heating requirements of the thermal management system in low-temperature environments.

[0041] Furthermore, the indirect thermal management system based on hot water recirculation also includes an electric water pump 121. The inlet of the electric water pump 121 is connected to the outlet of the heating core 110, and the outlet of the electric water pump 121 is connected to the second inlet of the high-pressure water heat exchanger 102. The electric water pump 121 actively drives the high-temperature working medium to ensure that the working medium enters the high-pressure water heat exchanger 102 at a suitable flow rate and pressure, thereby enhancing the heat exchange efficiency with the heat exchange medium and maintaining the circulation stability of the working medium in the thermal management system.

[0042] Furthermore, the indirect thermal management system based on hot water recirculation also includes a low-temperature radiator 112, a cooling fan 113, and a ten-way valve 114. The inlet of the low-temperature radiator 112 is connected to the first outlet of the ten-way valve 114, and the outlet of the low-temperature radiator 112 is connected to the first inlet of the first three-way valve 106. The first inlet (port a) of the ten-way valve 114 is connected to the second outlet of the second three-way valve 111. The cooling fan 113 is positioned opposite to the low-temperature radiator 112. The low-temperature radiator 112 facilitates heat exchange between the air and the coolant, dissipating the heat carried by the coolant to the outside. The fan, through forced airflow, enhances the heat exchange efficiency between the air and the low-temperature radiator 112, accelerating the cooling speed of the coolant to maintain system stability. It should be noted that the multi-channel switching of the ten-way valve 114 flexibly controls the flow direction and distribution of the working medium in different loops, achieving precise thermal regulation under complex operating conditions and improving the overall energy efficiency of the thermal management system. This is a commonly used technical method and will not be elaborated further here.

[0043] Furthermore, the indirect thermal management system based on hot water recirculation also includes a fourth three-way valve 123. The inlet of the fourth three-way valve 123 is connected to the second outlet of the low-pressure water heat exchanger 104, the first outlet of the fourth three-way valve 123 is connected to the inlet of the cold core 108, and the second outlet of the fourth three-way valve 123 is connected to the second inlet (f port) of the ten-way valve 114. The working medium flowing out of the second outlet of the low-pressure water heat exchanger 104 is divided into two parts by the fourth three-way valve 123. One part enters the cold core 108, and the other part enters the ten-way valve 114. The working medium is regulated by the ten-way valve 114.

[0044] Optionally, the indirect thermal management system based on hot water recirculation also includes a one-way valve 115, the outlet of which is connected to the first inlet of the first three-way valve 106 to prevent the working medium in the first three-way valve 106 from recirculating through the first inlet of the first three-way valve 106 and affecting the circulation stability of the thermal management system.

[0045] Optionally, the indirect thermal management system based on hot water recirculation also includes a motor assembly 116 and a third three-way valve 117. The inlet of the motor assembly 116 is connected to the outlet of the low-temperature radiator 112. The lower-temperature working medium (such as coolant) after passing through the low-temperature radiator 112 enters the motor assembly 116 to provide cooling for the motor, thereby realizing heat transfer and temperature control within the motor. The outlet of the motor assembly 116 is connected to the first inlet of the third three-way valve 117, the outlet of the third three-way valve 117 is connected to the third inlet (j port) of the ten-way valve 114, and the second inlet of the third three-way valve 117 is connected to the outlet of the low-temperature radiator 112. It should be noted that when the second inlet of the third three-way valve 117 is connected to the low-temperature radiator 112, the working medium does not flow through the motor assembly 116. This is a commonly used technical means in the field and will not be elaborated further here.

[0046] Optionally, the indirect thermal management system based on hot water recirculation also includes a battery assembly 119. The inlet of the battery assembly 119 is connected to the second outlet of the high-pressure water heat exchanger 102 through a ten-way valve 114, and the outlet of the battery assembly 119 is connected to the second inlet of the low-pressure water heat exchanger 104 through a ten-way valve 114. Through heat transfer between the battery pack and the heat exchange medium (such as coolant or air), the temperature of the battery assembly 119 during charging and discharging is regulated to ensure that it operates within a suitable temperature range to guarantee performance and lifespan.

[0047] Furthermore, the indirect thermal management system based on hot water recirculation also includes a battery water pump 122. The battery water pump 122 receives the working medium regulated by the ten-way valve 114. The outlet of the battery water pump 122 is connected to the inlet of the battery assembly 119. The battery water pump 122 drives the circulation of the working medium to remove the heat generated by the battery assembly 119 in a timely manner. The flow rate of the working medium delivered to the battery assembly 119 can be regulated to achieve precise control of the temperature of the battery assembly 119.

[0048] The different operating modes of the indirect thermal management system based on hot water recirculation provided in this embodiment are as follows:

[0049] Heating mode

[0050] like Figures 2 to 3 As shown, the low-pressure superheated gas drawn in from the suction port of compressor 101 is compressed and discharged by compressor 101 into a high-temperature, high-pressure gaseous refrigerant, which then flows into high-pressure water heat exchanger 102. In high-pressure water heat exchanger 102, it exchanges heat with coolant, and then the coolant flows to the heater core 110 and battery assembly 119 to release heat. The refrigerant first passes through the liquid receiver 103 and then is throttled by expansion valve 107 before flowing into low-pressure water heat exchanger 104. Low-pressure water heat exchanger 104 exchanges heat with the coolant absorbed from the environment and the electric drive, turning the refrigerant into a superheated gas, which then flows into the suction port of compressor 101 to enter the next cycle.

[0051] At extremely low ambient temperatures, the battery assembly 119 has no residual heat, and the evaporation pressure on the low-pressure side of the compressor 101 is very low, preventing the compressor 101 from starting normally. At this time, turning on the PTC heater 105 allows high-temperature water to flow through the first three-way valve 106, raising the water temperature on the low-pressure side, allowing the compressor 101 to start normally. If the high-temperature water temperature is too high, the first three-way valve 106 can be proportionally adjusted to reduce the flow rate of high-temperature water into the low-pressure water heat exchanger 104, preventing excessively high low pressure. As the temperature of the battery assembly 119 rises, the PTC heater 105 and the first three-way valve 106 can be gradually turned off. The battery assembly 119 dissipates heat through a self-circulating loop.

[0052] Cooling mode

[0053] like Figure 4 As shown, the low-pressure superheated gas drawn in from the suction port of compressor 101 is compressed and discharged by compressor 101. The high-temperature, high-pressure gaseous refrigerant flows through high-pressure water heat exchanger 102, where it exchanges heat with the coolant dissipating heat to the environment through low-temperature radiator 112 and cooling fan 113. After exchanging heat, it flows to liquid storage tank 103, and then, after being throttled by expansion valve 107, it enters low-pressure water heat exchanger 104. There, the coolant and refrigerant, after absorbing heat from cold core 108, exchange heat again. The superheated refrigerant then merges and flows back into the suction port of compressor 101 to begin the next cycle. The motor assembly 116 dissipates heat through low-temperature radiator 112.

[0054] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An indirect thermal management system based on hot water recirculation, characterized in that, include: The compressor (101), the high-pressure water heat exchanger (102), and the low-pressure water heat exchanger (104) are connected. The outlet of the compressor (101) is connected to the first inlet of the high-pressure water heat exchanger (102), the first outlet of the high-pressure water heat exchanger (102) is connected to the first inlet of the low-pressure water heat exchanger (104), and the first outlet of the low-pressure water heat exchanger (104) is connected to the inlet of the compressor (101). PTC heater (105), the inlet of which is connected to the second outlet of the high-pressure water heat exchanger (102); The first three-way valve (106) has its outlet connected to the second inlet of the low-pressure water heat exchanger (104), its first inlet connected to the outlet of the PTC heater (105), and its second inlet connected to the second outlet of the low-pressure water heat exchanger (104).

2. The indirect thermal management system based on hot water recirculation according to claim 1, characterized in that, The indirect heat management system based on hot water recirculation also includes a storage tank (103), the inlet of which is connected to the first outlet of the high-pressure water heat exchanger (102), and the outlet of which is connected to the first inlet of the low-pressure water heat exchanger (104).

3. The indirect thermal management system based on hot water recirculation according to claim 2, characterized in that, The indirect heat management system based on hot water recirculation also includes an expansion valve (107), the inlet of which is connected to the outlet of the liquid storage tank (103), and the outlet of which is connected to the first inlet of the low-pressure water heat exchanger (104).

4. The indirect thermal management system based on hot water recirculation according to claim 1, characterized in that, The indirect heat management system based on hot water recirculation also includes a cold core (108), the inlet of which is connected to the second outlet of the low-pressure water heat exchanger (104), and the outlet of which is connected to the second inlet of the first three-way valve (106).

5. The indirect thermal management system based on hot water recirculation according to claim 4, characterized in that, The indirect thermal management system based on hot water recirculation also includes a blower (109), which is arranged opposite to the cold core (108).

6. The indirect thermal management system based on hot water recirculation according to claim 1, characterized in that, The indirect heat management system based on hot water recirculation also includes a heating core (110) and a second three-way valve (111). The inlet of the heating core (110) is connected to the outlet of the PTC heater (105), the outlet of the heating core (110) is connected to the inlet of the second three-way valve (111), and the first outlet of the second three-way valve (111) is connected to the second inlet of the high-pressure water heat exchanger (102).

7. The indirect thermal management system based on hot water recirculation according to claim 6, characterized in that, The indirect thermal management system based on hot water recirculation also includes a low-temperature radiator (112), a cooling fan (113), and a ten-way valve (114). The inlet of the low-temperature radiator (112) is connected to the second outlet of the second three-way valve (111) through the ten-way valve (114), and the outlet of the low-temperature radiator (112) is connected to the second inlet of the low-pressure water heat exchanger (104) through the first three-way valve (106). The cooling fan (113) is arranged opposite to the low-temperature radiator (112).

8. The indirect thermal management system based on hot water recirculation according to claim 7, characterized in that, The indirect heat management system based on hot water recirculation also includes a one-way valve (115), the outlet of which is connected to the first inlet of the first three-way valve (106).

9. The indirect thermal management system based on hot water recirculation according to claim 7, characterized in that, The indirect thermal management system based on hot water recirculation also includes a motor assembly (116) and a third three-way valve (117). The inlet of the motor assembly (116) is connected to the outlet of the low-temperature radiator (112), the outlet of the motor assembly (116) is connected to the first inlet of the third three-way valve (117), the outlet of the third three-way valve (117) is connected to the ten-way valve (114), and the second inlet of the third three-way valve (117) is connected to the outlet of the low-temperature radiator (112).

10. The indirect thermal management system based on hot water recirculation according to claim 9, characterized in that, The indirect thermal management system based on hot water recirculation also includes a battery assembly (119). The inlet of the battery assembly (119) is connected to the second outlet of the high-pressure water heat exchanger (102) through the ten-way valve (114), and the outlet of the battery assembly (119) is connected to the second inlet of the low-pressure water heat exchanger (104) through the ten-way valve (114).

Images