Temperature control system, electric vehicle and control method of temperature control system

Abstract

The application provides a temperature control system, an electric vehicle and a control method of the temperature control system. The temperature control system comprises an indoor temperature control assembly, an electric drive temperature control assembly, a battery temperature control assembly and a heat recovery assembly. The indoor temperature control assembly is used for circulating refrigerant and comprises a compressor, an indoor heat exchanger and an outdoor heat exchanger which are in circulation communication. The heat recovery assembly comprises a heat recovery heat exchanger, a first expansion valve and a second expansion valve. The heat recovery heat exchanger comprises a first channel, a second channel and a third channel. Refrigerant in the first channel is used for heat exchange with cold carrier in the second channel and the third channel respectively. The electric drive temperature control assembly comprises an electric drive heat exchange module which is connected in series with the second channel and is used for heat exchange with an electric drive system. The battery temperature control assembly comprises a battery heat exchange module which is connected in series with the third channel and is used for heat exchange with a battery assembly. The temperature control system, the electric vehicle and the control method of the temperature control system provided by the application reduce the volume and weight of the system, make full use of waste heat and reduce energy consumption.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of temperature control equipment, in particular to a temperature control system, an electric vehicle and a control method of the temperature control system. BACKGROUND

[0002] The existing automobile air conditioning system circulates refrigerant through a compressor, an outdoor heat exchanger, an outdoor fan, a throttle valve, an indoor heat exchanger and an indoor fan to realize refrigeration for a vehicle body. Cooling of an electric drive system of the vehicle is realized by circulating cooling liquid through a water pump, a water tank, a heat exchanger and a fan to cool the electric drive system. The two systems are independently operated. The battery thermal management system of the vehicle is also independently provided or integrated into the air conditioning system.

[0003] In the implementation of the present application, the inventors have found that the existing automobile air conditioning system, the cooling system of the electric drive system of the vehicle and the battery thermal management system of the vehicle include two or three independent systems, which are relatively independently arranged. This not only occupies more space of the vehicle body, but also increases the weight of the system and the vehicle. In addition, the systems are not organically combined, so that the heat of the electric drive system and the battery assembly cannot be utilized. For example, when the indoor heat exchanger is connected in parallel with a heat exchanger to cool the battery assembly, the battery assembly cannot be cooled in the indoor heating mode. SUMMARY

[0004] Therefore, the present application provides a temperature control system, an electric vehicle and a control method of the temperature control system to solve the problems that the system waste heat cannot be utilized and the battery assembly cannot be cooled in the indoor heating mode in the prior art.

[0005] To achieve the above-mentioned purposes, the technical solutions of the embodiments of the present application are as follows:

[0006] In a first aspect, the embodiments of the present application provide a temperature control system, which comprises an indoor temperature control assembly, an electric drive temperature control assembly, a battery temperature control assembly and a heat recovery assembly.

[0007] The indoor temperature control assembly is used for circulating refrigerant and comprises a compressor, an indoor heat exchanger and an outdoor heat exchanger which are connected in circulation to realize heating circulation.

[0008] The heat recovery assembly comprises a heat recovery heat exchanger, a first expansion valve and a second expansion valve, the heat recovery heat exchanger comprises a first channel, a second channel and a third channel; one end of the first expansion valve is connected between the indoor heat exchanger and the outdoor heat exchanger, and the other end is connected with one end of the first channel, the other end of the first channel is connected with the suction port of the compressor; one end of the second expansion valve is connected between the indoor heat exchanger and the outdoor heat exchanger, and the other end is connected with one end of the first channel, the other end of the first channel is connected with the suction port of the compressor; the refrigerant in the first channel is used for heat exchange with the cold carrier in the second channel and the third channel respectively.

[0009] The electric drive temperature control assembly comprises an electric drive heat exchange module, the electric drive heat exchange module is connected in series with the second channel, and can be used for heat exchange with an electric drive system.

[0010] The battery temperature control assembly comprises a battery heat exchange module, the battery heat exchange module is connected in series with the third channel, and can be used for heat exchange with a battery assembly.

[0011] In one of the embodiments, the indoor temperature control assembly further comprises a gas-liquid separator and a four-way reversing valve, the four-way reversing valve comprises a first interface, a second interface, a third interface and a fourth interface; the outlet of the gas-liquid separator is connected with the suction port of the compressor, the inlet of the gas-liquid separator is connected with the fourth interface and the first channel, and the exhaust port of the compressor is connected with the first interface.

[0012] The indoor temperature control assembly further comprises the indoor heat exchanger, a third expansion valve, a dry filter and the outdoor heat exchanger connected in series; one port of the indoor heat exchanger is connected with the third interface, and one port of the outdoor heat exchanger is connected with the second interface.

[0013] In one of the embodiments, the outlet of the first channel is connected to the pipeline between the gas-liquid separator and the fourth interface, the inlet of the first channel is connected with the first expansion valve and the second expansion valve respectively, the inlet of the first expansion valve is connected to the pipeline between the indoor heat exchanger and the third expansion valve, and the inlet of the second expansion valve is connected to the pipeline between the dry filter and the third expansion valve.

[0014] In one of the embodiments, the electric drive temperature control assembly further comprises a first circulating pump, the outlet of the first circulating pump is connected with the inlet of the electric drive heat exchange module, the inlet of the first circulating pump is connected with the outlet of the second channel, and the outlet of the electric drive heat exchange module is connected with the inlet of the second channel.

[0015] In one of the embodiments, the electric drive temperature control assembly further comprises an electric drive radiator and a control valve, the electric drive radiator is connected with the second channel, and the control valve is used to control the flow of the cold carrier out of the electric drive heat exchange module to flow into the second channel or the electric drive radiator.

[0016] In one of the embodiments, the battery temperature control assembly further comprises a second circulating pump, the outlet of the battery heat exchange module is connected with the inlet of the third channel, the inlet of the battery heat exchange module is connected with the outlet of the second circulating pump, and the inlet of the second circulating pump is connected with the outlet of the third channel.

[0017] In one of the embodiments, the temperature control system further comprises an indoor fan and an outdoor fan, the outdoor heat exchanger and the electric drive radiator are integrated, the indoor fan is used to increase the air flow rate at the indoor heat exchanger, and the outdoor fan is used to increase the air flow rate at the outdoor heat exchanger and the electric drive radiator.

[0018] In a second aspect, the embodiments of the present application provide an electric vehicle, comprising the temperature control system as described above.

[0019] In a third aspect, the embodiments of the present application provide a control method of a temperature control system, applied to the temperature control system as described above, the electric drive temperature control assembly further comprises a first circulating pump, an electric drive radiator and a control valve, the first circulating pump and the electric drive heat exchange module are connected in series, and the electric drive radiator is connected with the second channel; the battery temperature control assembly further comprises a second circulating pump.

[0020] The temperature control system in the indoor heating mode comprises an electric drive temperature control assembly control step and a battery temperature control assembly control step,

[0021] The electric drive temperature control assembly control step comprises:

[0022] S10, a preset outlet water temperature T13 of the electric drive heat exchange module is set;

[0023] S11, the actual outlet water temperature T12 of the electric drive heat exchange module is detected in real time, and it is judged whether T12>T13 is established,

[0024] If it is established, the control valve is controlled to make the cold carrier out of the electric drive heat exchange module flow into the electric drive radiator, the outdoor fan and the first circulating pump are turned on, it is judged whether the battery temperature control assembly is in a working state, if yes, the current state is kept unchanged, and if no, the first expansion valve is closed.

[0025] If not, it is judged whether the indoor temperature control component is turned on, if yes, the control valve is controlled to make the refrigerant flowing out of the electric drive heat exchange module flow into the second channel, the first circulating pump and the first expansion valve are turned on, and the second expansion valve is turned off; if not, it is judged whether the battery temperature control component is in working state, if the battery temperature control component is in working state, the first circulating pump is turned off; if the battery temperature control component is not in working state, the first expansion valve and the first circulating pump are turned off;

[0026] S12, the step S11 is repeatedly executed until the temperature control system exits the heating mode;

[0027] The battery temperature control component control step comprises:

[0028] S20, a preset outlet water temperature T23 of the battery heat exchange module is set;

[0029] S21, the actual outlet water temperature T22 of the battery heat exchange module is detected in real time, and it is judged whether T22>T23 is established,

[0030] If yes, it is judged whether the indoor temperature control component is turned on, if yes, the first expansion valve and the second circulating pump are turned on, and the second expansion valve is turned off; if not, the compressor, the first expansion valve and the second circulating pump are turned on, and the second expansion valve is turned off;

[0031] If not, it is judged whether the electric drive temperature control component exchanges heat through the second channel, if yes, the second circulating pump is turned off; if not, the first expansion valve, the second expansion valve and the second circulating pump are turned off;

[0032] S22, the step S21 is repeatedly executed until the temperature control system exits the heating mode.

[0033] In one of the embodiments, the temperature control system in the indoor cooling mode comprises an electric drive temperature control component control step and a battery temperature control component control step,

[0034] The electric drive temperature control component control step comprises:

[0035] S30, a preset outlet water temperature T33 of the electric drive heat exchange module is set;

[0036] S31, the actual outlet water temperature T32 of the electric drive heat exchange module is detected in real time, and it is judged whether T32>T33 is established, if yes, the control valve is controlled to make the refrigerant flowing out of the electric drive heat exchange module flow into the electric drive radiator, and the outdoor fan and the first circulating pump are turned on; if not, the first circulating pump and the outdoor fan are turned off;

[0037] S32, repeat step S31 until the electric drive system is closed;

[0038] The battery temperature control component control step comprises:

[0039] S40, set the preset water outlet temperature T43 of the battery heat exchange module;

[0040] S41, real-time detect the actual water outlet temperature T42 of the battery heat exchange module, and judge whether T42>T43 is established,

[0041] If yes, judge whether the indoor temperature control component is opened, if yes, open the second expansion valve and the second circulating pump, and close the first expansion valve; if no, open the compressor, the second expansion valve and the second circulating pump, and close the first expansion valve;

[0042] If not, close the second circulating pump and the second expansion valve;

[0043] S42, repeat step S41 until the battery assembly stops working.

[0044] The temperature control system provided by the application has the following beneficial effects: the indoor temperature control component, the electric drive temperature control component and the battery temperature control component are organically combined together, the overall volume and weight of the system are reduced, and by setting the heat recovery component, in the indoor heating mode, the heat of the electric drive system and the battery assembly is recovered by opening the first expansion valve, the refrigerant temperature at the inlet of the compressor can be improved, the compression amount of the compressor is reduced, the energy efficiency ratio of the compressor is improved, the energy consumption is reduced, the endurance of the electric vehicle is effectively prolonged, and the heat dissipation of the battery assembly during indoor heating is realized. In addition, the battery temperature control component can be independently operated with the indoor temperature control component without affecting each other.

[0045] In summary, the application can solve the problems of waste heat utilization and battery assembly heat dissipation during indoor heating in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 FIG. 1 is a structural schematic diagram of a temperature control system according to an embodiment of the application.

[0047] Figure 2 FIG. 2 is a structural schematic diagram of a temperature control system according to another embodiment of the application.

[0048] Figure 3 FIG. 3 is a liquid flow direction schematic diagram of the temperature control system of FIG. 1 in the indoor heating mode (T12>T13). Figure 1

[0049] Figure 4 FIG. 4 is a liquid flow direction schematic diagram of the temperature control system of FIG. 2 in the indoor heating mode (T12>T13).​Figure 1 Schematic diagram of liquid flow direction of the temperature control system in the indoor heating mode (T12 > T13).

[0050] Figure 5 For Figure 1 Schematic diagram of liquid flow direction of the temperature control system in the indoor cooling mode (T12 > T13).

[0051] Figure 6 For Figure 1 Schematic diagram of liquid flow direction of the temperature control system in the defrosting mode (T12 > T13).

[0052] Figure 7 Schematic diagram of the flow of the indoor temperature control component control steps of the temperature control system in the indoor heating mode of the embodiment of the present application.

[0053] Figure 8 Schematic diagram of the flow of the electric drive temperature control component control steps of the temperature control system in the indoor heating mode of the embodiment of the present application.

[0054] Figure 9 Schematic diagram of the flow of the battery temperature control component control steps of the temperature control system in the indoor heating mode of the embodiment of the present application.

[0055] Figure 10 Schematic diagram of the flow of the indoor temperature control component control steps of the temperature control system in the indoor cooling mode of the embodiment of the present application.

[0056] Figure 11 Schematic diagram of the flow of the electric drive temperature control component control steps of the temperature control system in the indoor cooling mode of the embodiment of the present application.

[0057] Figure 12 Schematic diagram of the flow of the battery temperature control component control steps of the temperature control system in the indoor cooling mode of the embodiment of the present application.

[0058] Note: in Figures 3 to 6 , the solid arrow indicates the flow direction of the refrigerant, the solid line hollow arrow indicates the flow direction of the electric drive temperature control component, and the dashed line hollow arrow indicates the flow direction of the battery temperature control component.

[0059] The meanings of the various reference numerals in the drawings are as follows:

[0060] 10, indoor temperature control component; 11, compressor; 12, gas-liquid separator; 13, four-way reversing valve; 131, first interface; 132, second interface; 133, third interface; 134, fourth interface; 14, indoor heat exchanger; 141, indoor fan; 15, third expansion valve; 16, drying filter; 17, outdoor heat exchanger; 171, outdoor fan; 18, pressure sensor; 19, condensation temperature detection device;

[0061] 20. Electric drive temperature control assembly; 21. Electric drive heat exchange module; 22. First circulation pump; 23. Electric drive radiator; 24. Control valve; 25. First expansion water tank; 26. First water temperature detection device;

[0062] 30. Battery temperature control assembly; 31. Battery heat exchange module; 32. Second circulation pump; 33. Second expansion water tank; 34. Second water temperature detection device;

[0063] 40. Heat recovery component; 41. Heat recovery heat exchanger; 411. First channel; 412. Second channel; 413. Third channel; 42. First expansion valve; 43. Second expansion valve. DETAILED DESCRIPTION

[0064] The technical solution of this application is further elaborated in detail below with reference to the accompanying drawings and specific embodiments.

[0065] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit the implementation of this application. The term "and / or" as used herein includes any and all combinations of one or more of the relevant listed items.

[0066] In the description of this application, it should be understood that the terms "center," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting this application. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0067] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0068] See also Figure 1 and Figure 2 The temperature control system of the embodiment of the present application includes an indoor temperature control component 10, an electric drive temperature control component 20, a battery temperature control component 30 and a heat recovery component 40.

[0069] The indoor temperature control assembly 10 is used for circulating refrigerant, and comprises a compressor 11, an indoor heat exchanger 14 and an outdoor heat exchanger 17 in circulation connection. It can be understood that the compressor 11, the indoor heat exchanger 14 and the outdoor heat exchanger 17 in circulation connection means that the exhaust port of the compressor 11 is connected with one end of the indoor heat exchanger 14, the other end of the indoor heat exchanger 14 is connected with one end of the outdoor heat exchanger 17, and the other end of the outdoor heat exchanger 17 is connected with the suction port of the compressor 11 to realize a heating cycle.

[0070] The heat recovery assembly 40 comprises a heat recovery heat exchanger 41, a first expansion valve 42 and a second expansion valve 43, the heat recovery heat exchanger 41 comprises a first channel 411, a second channel 412 and a third channel 413; one end of the first expansion valve 42 is connected between the indoor heat exchanger 14 and the outdoor heat exchanger 17, the other end of the first expansion valve 42 is connected with one end of the first channel 411, and the other end of the first channel 411 is connected with the suction port of the compressor 11; one end of the second expansion valve 43 is connected between the indoor heat exchanger 14 and the outdoor heat exchanger 17, the other end of the second expansion valve 43 is connected with one end of the first channel 411, and the other end of the first channel 411 is connected with the suction port of the compressor 11; the refrigerant in the first channel 411 is used for heat exchange with the carrier refrigerant in the second channel 412 and the third channel 413, respectively. The heat recovery heat exchanger 41 in the embodiment is a three-channel plate heat exchanger, that is, the first channel 411 can perform heat exchange with the second channel 412 and the third channel 413, respectively.

[0071] The electric drive temperature control assembly 20 comprises an electric drive heat exchange module 21, the electric drive heat exchange module 21 is connected in series with the second channel 412, and is used for heat exchange with an electric drive system, the electric drive system comprising a motor and an electric control assembly of an electric vehicle.

[0072] The battery temperature control assembly 30 comprises a battery heat exchange module 31, the battery heat exchange module 31 is connected in series with the third channel 413, and is used for heat exchange with a battery assembly, the battery assembly providing power for the electric vehicle.

[0073] Specifically, in the embodiment, the indoor temperature control assembly 10 further comprises a gas-liquid separator 12 and a four-way reversing valve 13, the four-way reversing valve 13 comprises a first interface 131, a second interface 132, a third interface 133 and a fourth interface 134; the outlet of the gas-liquid separator 12 is connected with the suction port of the compressor 11, the inlet of the gas-liquid separator 12 is connected with the fourth interface 134 and the first channel 411, respectively, and the exhaust port of the compressor 11 is connected with the first interface 131. It can be understood that one end of the first expansion valve 42 and one end of the second expansion valve 43 are connected with one end of the first channel 411, respectively, and the other end of the first channel 411 is connected with the inlet of the gas-liquid separator 12, so that the refrigerant in the first channel 411 flows back to the compressor 11.

[0074] The indoor temperature control assembly 10 further comprises an indoor heat exchanger 14, a third expansion valve 15, a drying filter 16 and an outdoor heat exchanger 17 connected in sequence. One port of the indoor heat exchanger 14 is connected with the third interface 133, and one port of the outdoor heat exchanger 17 is connected with the second interface 132. It can be understood that, when heating, the first interface 131 and the third interface 133 are in communication, and the second interface 132 and the fourth interface 134 are in communication; when cooling, the first interface 131 and the second interface 132 are in communication, and the third interface 133 and the fourth interface 134 are in communication. In the embodiment, the other port of the indoor heat exchanger 14 is connected with the first expansion valve 42 and the third expansion valve 15 respectively, the other port of the outdoor heat exchanger 17 is connected with one end of the drying filter 16, and the other end of the drying filter 16 is connected with the second expansion valve 43 and the third expansion valve 15 respectively.

[0075] The indoor heat exchanger 14 and the outdoor heat exchanger 17 of the embodiment can each adopt a coil heat exchanger. An indoor fan 141 is arranged at the indoor heat exchanger 14, and the indoor fan 141 is used to increase the air flow rate at the indoor heat exchanger 14 to achieve forced convection heat exchange. An outdoor fan 171 is arranged at the outdoor heat exchanger 17. It can be understood that, the above-mentioned fan can be arranged at the air outlet side or the air inlet side of the above-mentioned heat exchanger to improve the heat exchange effect of the above-mentioned heat exchanger through forced convection heat exchange. In order to improve the operation accuracy and stability of the indoor temperature control assembly 10, a pressure detection device can also be arranged, for example, a pressure sensor 18 can be arranged on the pipeline at the suction port side of the compressor 11, and a pressure sensor 18 can also be arranged on the pipeline at the exhaust port side of the compressor 11. An indoor temperature detection device can also be arranged near the indoor heat exchanger 14, which can be a temperature sensor.

[0076] When the indoor temperature control assembly 10 is in an operating state, the compressor 11 and the third expansion valve 15 need to be kept open. For example, Figure 3 and Figure 4As shown in the figure, when the indoor heating mode is run, first, the first interface 131 and the third interface 133 of the four-way reversing valve 13 are connected, the second interface 132 and the fourth interface 134 are connected, the low-temperature and low-pressure gaseous refrigerant is compressed into high-temperature and high-pressure steam (or gaseous refrigerant) by the compressor 11, enters the indoor heat exchanger 14 through the first interface 131 and the third interface 133 of the four-way reversing valve 13, exchanges heat with the indoor gas through the forced convection of the indoor fan 141, the indoor gas is heated, and the refrigerant is condensed into medium-temperature and high-pressure liquid refrigerant after releasing heat, enters the outdoor heat exchanger 17 through the third expansion valve 15 after throttling, exchanges heat with the outdoor air through the forced convection of the outdoor fan 171, is evaporated after absorbing heat, and forms low-temperature and low-pressure gaseous refrigerant, which enters the gas-liquid separator 12 through the second interface 132 and the fourth interface 134 and returns to the compressor 11, completing a heating cycle. As shown in the figure, Figure 5 As shown in the figure, when the indoor heating mode is run, first, the first interface 131 and the third interface 133 of the four-way reversing valve 13 are connected, the second interface 132 and the fourth interface 134 are connected, the low-temperature and low-pressure gaseous refrigerant is compressed into high-temperature and high-pressure steam (or gaseous refrigerant) by the compressor 11, enters the indoor heat exchanger 14 through the first interface 131 and the third interface 133 of the four-way reversing valve 13, exchanges heat with the indoor gas through the forced convection of the indoor fan 141, the indoor gas is heated, and the refrigerant is condensed into medium-temperature and high-pressure liquid refrigerant after releasing heat, enters the outdoor heat exchanger 17 through the third expansion valve 15 after throttling, exchanges heat with the outdoor air through the forced convection of the outdoor fan 171, is evaporated after absorbing heat, and forms low-temperature and low-pressure gaseous refrigerant, which enters the gas-liquid separator 12 through the second interface 132 and the fourth interface 134 and returns to the compressor 11, completing a heating cycle. As shown in the figure,

[0077] As shown in the figure, Figure 1 and Figure 2 As shown in the figure, the heat recovery heat exchanger 41 of the heat recovery assembly 40 of the embodiment includes a first channel 411, a second channel 412, and a third channel 413, and the first channel 411 can exchange heat with the second channel 412 and the third channel 413, respectively. The outlet of the first channel 411 is connected to the pipeline between the inlet of the gas-liquid separator 12 and the fourth interface 134 of the four-way reversing valve 13, the inlet of the first channel 411 is connected to the pipeline in series with the first expansion valve 42 through a pipeline, and the inlet of the first channel 411 is also connected to the pipeline in series with the second expansion valve 43 through another pipeline. The inlet of the first expansion valve 42 is connected to the pipeline between the indoor heat exchanger 14 and the third expansion valve 15, and the inlet of the second expansion valve 43 is connected to the pipeline between the dry filter 16 and the third expansion valve 15.

[0078] The electric drive temperature control assembly 20 of the embodiment further comprises a first circulating pump 22, an electric drive heat sink 23 and a control valve 24. The outlet of the first circulating pump 22 is connected to the inlet of the electric drive heat exchange module 21, the inlet of the first circulating pump 22 is connected to the outlet of the second channel 412, and the outlet of the electric drive heat exchange module 21 is connected to the inlet of the second channel 412. The heat exchange between the cold carrier in the second channel 412 and the refrigerant in the first channel 411 is used to realize the waste heat recovery function. In the indoor heating mode, the temperature of the refrigerant at the inlet of the compressor 11 can be increased, thereby reducing the compression amount of the compressor 11, improving the energy efficiency ratio of the compressor 11, reducing the energy consumption, and enhancing the heating effect of the compressor 11. The control valve 24 in the embodiment can be an electric three-way valve. The control valve 24 comprises an inlet and two outlets. The inlet of the control valve 24 is connected to the outlet of the electric drive heat exchange module 21, the first outlet is connected to the inlet of the second channel 412, and the second outlet is connected to the inlet of the electric drive heat sink 23. The outlet of the electric drive heat sink 23 is connected to the inlet of the first circulating pump 22, that is, the electric drive heat sink 23 and the second channel 412 are connected in parallel. The control valve 24 is used to control the cold carrier flowing out of the electric drive heat exchange module 21 to flow into the second channel 412 or the electric drive heat sink 23. The electric drive heat sink 23 is provided to meet the heat dissipation requirement of the electric drive system under different working conditions. In order to make the overall structure of the temperature control system more compact, the electric drive heat sink 23 and the outdoor heat exchanger 17 can be integrally arranged. In addition, the electric drive heat sink 23 and the outdoor heat exchanger 17 can share the outdoor fan 171, thereby reducing the number of fans used, the investment cost and the weight of the whole machine. It can be understood that the outdoor fan 171 is used to increase the air flow rate at the outdoor heat exchanger 17 and the electric drive heat sink 23, so as to realize forced convection heat exchange.

[0079] In some embodiments, the electric drive temperature control assembly 20 can further comprise a first expansion water tank 25 connected in parallel with the first circulating pump 22 and the electric drive heat exchange module 21. The inlet of the first expansion water tank 25 is connected to the pipeline between the inlet of the control valve 24 and the outlet of the electric drive heat exchange module 21, and the outlet of the first expansion water tank 25 is connected to the pipeline between the inlet of the first circulating pump 22 and the outlet of the second channel 412. The first expansion water tank 25 can supplement the cold carrier of the system of the electric drive temperature control assembly 20 before the water outlet of the first circulating pump 22, and can also function as an exhaust after the liquid outlet of the electric drive heat exchange module 21.

[0080] In order to improve the automation degree of the temperature control system, a first water temperature detection device 26 can be arranged, for example, a temperature sensor can be arranged on the pipeline between the outlet of the electric drive heat exchange module 21 and the inlet of the control valve 24, which is used to detect the temperature of the cold carrier flowing out of the outlet of the electric drive heat exchange module 21.

[0081] A preset outlet water temperature T3 of the electric drive heat exchange module 21 can be set, and T3 can be set to 30°C, for example. The outlet water temperature T2 of the electric drive heat exchange module 21 is detected by the first water temperature detection device 26. Figure 3 and Figure 5 As shown, when T2>T3, the electric drive system is cooled by the electric drive radiator 23. At this time, the inlet and the second outlet of the control valve 24 and the first circulation pump 22 are opened to allow the coolant flowing out of the electric drive heat exchange module 21 to flow into the electric drive radiator 23, and the electric drive system is cooled by the electric drive radiator 23; when T2≤T3, there are two cases, as follows: Figure 4 As shown, when the indoor temperature control component 10 executes the indoor heating mode and the compressor 11 and the third expansion valve 15 are both opened, the heat of the electric drive system is recovered through the second channel 412 to improve the energy efficiency ratio of the compressor 11. At this time, the inlet and the first outlet of the control valve 24 need to be opened, that is, the inlet and the first outlet of the control valve 24 are connected (the second outlet is closed), so that the coolant flowing out of the electric drive heat exchange module 21 enters the second channel 412. At the same time, the first circulation pump 22 and the first expansion valve 42 need to be opened to allow the coolant flowing out of the indoor heat exchanger 14 to enter the second channel 412. The refrigerant is divided into two paths, the first path passes through the third expansion valve 15 and the drying filter 16 to enter the outdoor heat exchanger 17, and the second path passes through the first expansion valve 42 to enter the first channel 411, and merges with the first path of refrigerant in front of the gas-liquid separator 12 and then returns to the compressor 11 together; when the indoor temperature control component 10 executes the indoor cooling mode or one of the compressor 11 and the third expansion valve 15 is closed, there is no need to recover the waste heat through the heat recovery heat exchanger 41, but the electric drive system can still be cooled through the electric drive radiator 23 according to actual conditions.

[0082] The battery temperature control assembly 30 of this embodiment also includes a second circulation pump 32. The outlet of the battery heat exchange module 31 is connected to the inlet of the third channel 413. The inlet of the battery heat exchange module 31 is connected to the outlet of the second circulation pump 32, and the inlet of the second circulation pump 32 is connected to the outlet of the third channel 413. The battery temperature control assembly 30 may also include a second expansion water tank 33. The inlet of the second expansion water tank 33 is connected to the pipeline between the outlet of the battery heat exchange module 31 and the inlet of the third channel 413. The outlet of the second expansion water tank 33 is connected to the pipeline between the inlet of the second circulation pump 32 and the outlet of the third channel 413. The second expansion water tank 33 can replenish the coolant in the battery temperature control assembly 30 system before the second circulation pump 32 discharges water, and can also serve as a vent after the battery heat exchange module 31 discharges liquid.

[0083] To improve the degree of automation of the temperature control system, a second water temperature detection device 34 can also be provided, for example, a temperature sensor can be provided on the pipeline between the outlet of the battery heat exchange module 31 and the inlet of the third channel 413, for detecting the temperature of the refrigerant flowing out of the outlet of the battery heat exchange module 31.

[0084] The preset outlet water temperature T3 of the battery heat exchange module 31 can be set, and the actual outlet water temperature T2 of the battery heat exchange module 31 is detected in real time by the second water temperature detection device 34. When T2>T3, the battery assembly needs to be cooled by the heat recovery heat exchanger 41. At this time, there are three cases, as shown in Figure 3 and Figure 4 When the indoor temperature control assembly 10 executes the indoor heating mode and the compressor 11 and the third expansion valve 15 are both opened, the first expansion valve 42 and the second circulating pump 32 are opened, and the second expansion valve 43 is closed, the refrigerant in the third channel 413 and the refrigerant in the first channel 411 are exchanged, and the cooling of the battery assembly is realized. At this time, the flow direction of the refrigerant is the same as that when the heat of the electric drive system is recovered through the second channel 412, and will not be described again; as shown in Figure 5 When the indoor temperature control assembly 10 executes the indoor cooling mode and the compressor 11 and the third expansion valve 15 are both opened, the second expansion valve 43 and the second circulating pump 32 are opened, and the first expansion valve 42 is closed, the refrigerant in the third channel 413 and the refrigerant in the first channel 411 are exchanged, and the cooling of the battery assembly is realized. At this time, the refrigerant flows out of the outdoor heat exchanger 17, passes through the drying filter 16, and is divided into two paths, the first path enters the indoor heat exchanger 14 after passing through the third expansion valve 15, and the second path enters the first channel 411 of the heat recovery heat exchanger 41 after passing through the second expansion valve 43. The refrigerant flowing out of the heat recovery heat exchanger 41 is combined with the first path refrigerant, and then returns to the compressor 11. There is another case when the indoor temperature control assembly 10 is not started (the compressor 11 and the third expansion valve 15 are both closed), at this time, the battery temperature control assembly 30 can be started alone, the compressor 11, the second circulating pump 32 and the second expansion valve 43 are started, and the first expansion valve 42 and the third expansion valve 15 are closed (or the compressor 11, the second circulating pump 32 and the first expansion valve 42 are started, and the second expansion valve 43 and the third expansion valve 15 are closed), at this time, the refrigerant flows out of the exhaust port of the compressor 11, and then passes through the outdoor heat exchanger 17, the drying filter 16, the second expansion valve 43, the first channel 411 and the gas-liquid separator 12 in turn, and then flows back to the compressor 11 (or the refrigerant flows out of the exhaust port of the compressor 11, and then passes through the indoor heat exchanger 14, the first expansion valve 42, the first channel 411 and the gas-liquid separator 12 in turn, and then flows back to the compressor 11). When T2≤T3, the battery assembly does not need to be cooled by the heat recovery heat exchanger 41.

[0085] The embodiment of the present application also provides an electric vehicle comprising the temperature control system.

[0086] The embodiment of the present application also provides a control method of the temperature control system, which is applied to the temperature control system and the indoor temperature control component 10 of the temperature control system comprises an indoor heating mode, an indoor cooling mode and a ventilation mode.

[0087] In the indoor heating mode, the control method of the temperature control system comprises an indoor temperature control component 10 control step, an electric drive temperature control component 20 control step and a battery temperature control component 30 control step.

[0088] As shown in FIG. 1, the indoor temperature control component 10 control step comprises: Figure 7

[0089] S50, setting an indoor preset temperature T50.

[0090] The indoor preset temperature T50 can be set according to actual needs.

[0091] S51, detecting an indoor actual temperature T51 in real time through an indoor temperature detection device and judging whether T50>T51 is established,

[0092] If yes, the indoor temperature control component 10 is started, that is, the compressor 11, the third expansion valve 15, the indoor fan 141 and the outdoor fan 171 are started;

[0093] If no, the battery temperature control component 30 is judged, if no, the compressor 11, the third expansion valve 15, the indoor fan 141 and the outdoor fan 171 are closed, if yes, the third expansion valve 15 and the outdoor fan 171 are closed.

[0094] This step is to judge whether the indoor actual temperature T51 is lower than the indoor preset temperature T50, if yes, heating is needed, if no, the indoor temperature control component 10 is kept in standby state.

[0095] ​The criterion for judging that the indoor temperature control component 10 is turned on is that the compressor 11 and the third expansion valve 15 are both turned on. When T50≤T51, if the battery temperature control component 30 is in the turned-on state (it can be judged that the battery temperature control component 30 is in the turned-on state when the second circulating pump 32 is in the turned-on state), the compressor 11 does not need to be turned off, only the outdoor fan 171 is turned off, the third expansion valve 15 is kept in the closed state, but the first expansion valve 42 can be turned on, so that the refrigerant flowing out of the indoor heat exchanger 14 exchanges heat with the cold carrier in the first passage 411 and the third passage 413 through the first expansion valve 42, thereby realizing the cooling of the battery component.

[0096] When the indoor temperature control component 10 works alone, only the third expansion valve 15 is turned on among the three expansion valves, and the first expansion valve 42 and the second expansion valve 43 are both turned off.

[0097] S52, repeat step S51 until the temperature control system exits the indoor heating mode.

[0098] As shown in FIG. 6, the control steps of the electric drive temperature control component 20 include: Figure 8

[0099] S10, set the preset outlet water temperature T13 of the electric drive heat exchange module 21.

[0100] S11, detect the actual outlet water temperature T12 of the electric drive heat exchange module 21 in real time, and judge whether T12>T13 is established,

[0101] If yes, control the control valve 24 to make the cold carrier flowing out of the electric drive heat exchange module 21 flow into the electric drive radiator 23, turn on the outdoor fan 171 and the first circulating pump 22; judge whether the battery temperature control component 30 is in the working state, if yes, keep the current state unchanged; if no, turn off the first expansion valve 42.

[0102] If no, judge whether the indoor temperature control component 10 is turned on, if yes, control the control valve 24 to make the cold carrier flowing out of the electric drive heat exchange module 21 flow into the second passage 412, turn on the first circulating pump 22 and the first expansion valve 42, and turn off the second expansion valve 43; if no, judge whether the battery temperature control component 30 is in the working state, if yes, turn off the first circulating pump 22; if no, turn off the first expansion valve 42 and the first circulating pump 22.

[0103] ​This step is also when T12>T13, it means that the heat dissipation demand of the electric drive system is higher at this time, and it can be considered that the heat recovery heat exchanger 41 cannot meet its heat dissipation demand, and the electric drive radiator 23 needs to be used to cool the electric drive system. At this time, the inlet and the second outlet of the control valve 24 are opened, that is, the inlet and the second outlet of the control valve 24 are made to be in conduction (the first outlet is cut off), so that the cold carrier flowing out of the electric drive heat exchange module 21 flows into the electric drive radiator 23, and the outdoor fan 171 and the first circulating pump 22 are opened at the same time. At this time, it is also necessary to judge whether the battery temperature control assembly 30 is in the working state (the second circulating pump 32 is opened to judge whether the battery temperature control assembly 30 is in the working state), if the battery temperature control assembly 30 is in the working state, the current state is maintained, and no adjustment is needed; if the battery temperature control assembly 30 is not in the working state, the first expansion valve 42 is closed, and the inlet and the first outlet of the control valve 24 are closed.

[0104] S12, repeat step S11 until the temperature control system exits the heating mode.

[0105] As shown in Figure 9 , the battery temperature control assembly 30 control step includes:

[0106] S20, set the preset outlet water temperature T23 of the battery heat exchange module 31.

[0107] S21, real-time detect the actual outlet water temperature T22 of the battery heat exchange module 31, and judge whether T22>T23 is established,

[0108] If yes, judge whether the indoor temperature control assembly 10 is opened, if yes, open the first expansion valve 42 and the second circulating pump 32, and close the second expansion valve 43; if not, open the compressor 11, the first expansion valve 42 and the second circulating pump 32, and close the second expansion valve 43;

[0109] If not, judge whether the electric drive temperature control assembly 20 exchanges heat through the second channel 412, if yes, close the second circulating pump 32; if not, close the first expansion valve 42, the second expansion valve 43 and the second circulating pump 32.

[0110] When T22 > T23, it indicates that the battery module needs to dissipate heat, and the compressor 11 needs to be started to cool the coolant in the third channel 413 with the refrigerant in the first channel 411, so as to dissipate the heat of the battery module. At this time, it is necessary to determine whether the indoor temperature control component 10 is started. If the indoor temperature control component 10 is in the started state, then the compressor 11 is already in the started state at this time, and only the first expansion valve 42 and the second circulation pump 32 need to be started. If the indoor temperature control component 10 is not started, then the compressor 11 also needs to be started at this time. In the indoor heating mode, the second expansion valve 43 also needs to be closed so that the refrigerant can be split to the heat recovery heat exchanger 41 through the first expansion valve 42 after flowing out of the indoor heat exchanger 14.

[0111] When T22 ≤ T23, it indicates that the temperature of the battery module is not high at this time and heat dissipation is not required. At this time, the opening and closing state of the indoor temperature control component 10 remains unchanged. At the same time, it is judged whether the electric drive temperature control component 20 exchanges heat through the second channel 412 (if the first circulation pump 22, as well as the inlet and the first outlet of the control valve 24 are all in the opened state, it can be judged that the electric drive temperature control component 20 exchanges heat through the second channel 412 to realize the heat recovery function). At this time, the first expansion valve 42 remains in the opened state, the second expansion valve 43 remains in the closed state, and the second circulation pump 32 is closed. If the electric drive temperature control component 20 does not exchange heat through the second channel 412, then the first expansion valve 42 and the second circulation pump 32 are closed, and the second expansion valve 43 remains in the closed state.

[0112] S22. Repeat step S21 until the temperature control system exits the heating mode.

[0113] In the indoor cooling mode, the temperature control system includes the control steps of the indoor temperature control component 10, the control steps of the electric drive temperature control component 20, and the control steps of the battery temperature control component 30. It can be understood that when entering the indoor cooling mode, the four-way reversing valve 13 will switch to conduct its first interface 131 and the second interface 132, and its third interface 133 and the fourth interface 134 will conduct.

[0114] As Figure 10 shown, the control steps of the indoor temperature control component 10 include:

[0115] S60. Set the indoor preset temperature T60.

[0116] The indoor preset temperature T60 can be set as needed.

[0117] S61. Start the indoor fan 141. The indoor fan 141 operates in the ventilation mode, and the actual indoor temperature T61 is detected in real time, and it is judged whether T60 < T61 holds.

[0118] If it holds, start the indoor temperature control component 10.

[0119] If not, it is judged whether the battery temperature control component 30 is turned on. If yes, the first expansion valve 42 is closed, and the second expansion valve 43 is kept in the open state. If not, the third expansion valve 15 and the compressor 11 are closed, and the first expansion valve 42 and the second expansion valve 43 are kept in the closed state.

[0120] This step is to judge whether the actual indoor temperature T61 is higher than the preset indoor temperature T60. If yes, the indoor cooling is needed. If not, the indoor cooling is not needed.

[0121] S62, the step S61 is repeatedly executed until the temperature control system exits the indoor cooling mode.

[0122] This step is to monitor the actual indoor temperature T61 in real time. As long as the temperature control system is in the indoor cooling mode, the actual indoor temperature T61 is detected. If it is higher than T60, the cooling is needed. If it is not higher than T60, the cooling is stopped. When the temperature control system exits the indoor cooling mode, the step S61 is also stopped, and the actual indoor temperature T61 is no longer monitored in real time.

[0123] As shown in FIG. 6, the control steps of the electric drive temperature control component 20 include: Figure 11

[0124] S30, the preset outlet water temperature T33 of the electric drive heat exchange module 21 is set.

[0125] S31, the actual outlet water temperature T32 of the electric drive heat exchange module 21 is detected in real time. It is judged whether T32>T33 is established. If yes, the control valve 24 is controlled to make the cold carrier flowing out of the electric drive heat exchange module 21 flow into the electric drive radiator 23, and the outdoor fan 171 and the first circulating pump 22 are turned on. If not, the first circulating pump 22 and the outdoor fan 171 are closed.

[0126] At this time, the indoor temperature control component 10 is in the indoor cooling mode. In this mode, the heat of the electric drive system does not need to be recovered. Therefore, only when the actual outlet water temperature T32 of the electric drive heat exchange module 21 exceeds the preset outlet water temperature T33 of the electric drive heat exchange module 21, the electric drive radiator 23 is used to cool it. When T32 does not exceed T33, the cold carrier does not need to be cooled.

[0127] When T32>T33, the inlet and the second outlet of the control valve 24 are opened, so that the cold carrier flowing out of the electric drive heat exchange module 21 flows into the electric drive radiator 23. At the same time, the outdoor fan 171 and the first circulating pump 22 are turned on. When T32≤T33, the first circulating pump 22 and the outdoor fan 171 are closed, and the inlet and the second outlet of the control valve 24 are closed.

[0128] ​S32, repeat step S31 until the electric drive system is closed.

[0129] As shown in FIG. 1, the battery temperature control component 30 controls the steps as follows: Figure 12

[0130] S40, set the preset outlet water temperature T43 of the battery heat exchange module 31.

[0131] S41, real-time detect the actual outlet water temperature T42 of the battery heat exchange module 31, and determine whether T42>T43 is true,

[0132] If true, determine whether the indoor temperature control component 10 is on, if yes, open the second expansion valve 43 and the second circulating pump 32, and close the first expansion valve 42; if not, open the compressor 11, the second expansion valve 43 and the second circulating pump 32, and close the first expansion valve 42.

[0133] If not true, close the second circulating pump 32 and the second expansion valve 43.

[0134] At this time, the indoor temperature control component 10 is in the indoor cooling mode, and in this mode, the cooling of the battery component can still be realized, and the battery temperature control system can be operated independently in any mode, and the battery temperature control component 30 can be opened to cool the battery component as long as the battery component needs cooling. When T42>T43, it means that the temperature of the battery component is high, and it needs to be cooled, if the indoor temperature control component 10 is in the on state at this time, only the second expansion valve 43 and the second circulating pump 32 need to be opened, and the first expansion valve 42 is kept closed; if the indoor temperature control component 10 is not on, the compressor 11 also needs to be opened.

[0135] S42, repeat step S41 until the battery component stops working.

[0136] When the temperature control system is in the ventilation mode, only the indoor fan 141 of the indoor temperature control component 10 needs to be opened, and the standby state is maintained. The control method of the electric drive temperature control component 20 is the same as that in the indoor cooling mode, which will not be described here. The control method of the battery temperature control component 30 can select the control method in the indoor cooling mode or the control method in the indoor heating mode, both of which can be realized, and a more reasonable control method can be selected according to the temperature condition of the environment, for example, when the outdoor environment temperature is high, the control method in the indoor cooling mode can be selected, and when the outdoor environment temperature is low, the control method in the indoor heating mode can be selected. At this time, because the indoor temperature control component 10 is in the standby state, the compressor 11 and the third expansion valve 15 are not opened, so in the control step, it is not necessary to consider whether the indoor temperature control component 10 is on.

[0137] ​In the indoor heating mode, the outdoor heat exchanger 17 will be frosted after a period of operation as an evaporator, and needs to run the defrosting mode every interval to melt and remove the frost layer.

[0138] At this time, the control steps of the indoor temperature control assembly 10 include:

[0139] S70, the system enters standby mode, and sets the condensation preset temperature T6, which can be set to 10℃.

[0140] S71, the condensation actual temperature T5 is detected in real time by the condensation temperature detection device 19, and it is judged whether T6>T5 is established,

[0141] If yes, the compressor 11, the third expansion valve 15, the indoor fan 141 and the outdoor fan 171 are started; at this time, the refrigerant flow direction is the same as that in the indoor refrigeration mode. The defrosting mode runs for more than 5 minutes, and ends.

[0142] If not, it ends.

[0143] The control steps of the electric drive temperature control assembly 20 include:

[0144] S80, the preset outlet water temperature T83 of the electric drive heat exchange module 21 is set.

[0145] S81, the actual outlet water temperature T82 of the electric drive heat exchange module 21 is detected in real time, and it is judged whether T82>T83 is established,

[0146] If yes, the control valve 24 is controlled to make the cold carrier flowing out of the electric drive heat exchange module 21 flow into the electric drive radiator 23, the outdoor fan 171 and the first circulating pump 22 are started; it is judged whether the battery temperature control assembly 30 is in working state, if yes, the current state is kept unchanged; if not, the second expansion valve 43 is closed;

[0147] If not, it is judged whether the indoor temperature control assembly 10 is started, if yes, the control valve 24 is controlled to make the cold carrier flowing out of the electric drive heat exchange module 21 flow into the second channel 412, the first circulating pump 22 and the second expansion valve 43 are started, and the first expansion valve 42 is closed; if not, it is judged whether the battery temperature control assembly 30 is in working state, if the battery temperature control assembly 30 is in working state, the first circulating pump 22 is closed; if the battery temperature control assembly 30 is not in working state, the first expansion valve 42 and the first circulating pump 22 are closed.

[0148] S82, step S81 is repeatedly executed until the temperature control system exits the defrosting mode.

[0149] The control steps of the battery temperature control assembly 30 include:

[0150] S90, set the preset outlet water temperature T93 of the battery heat exchange module 31.

[0151] S91, the actual outlet water temperature T92 of the battery heat exchange module 31 is detected in real time, and it is judged whether T92>T93 is established,

[0152] If it is established, it is judged whether the indoor temperature control assembly 10 is opened, if yes, the second expansion valve 43 and the second circulating pump 32 are opened, and the first expansion valve 42 is closed; if not, the compressor 11, the second expansion valve 43 and the second circulating pump 32 are opened, and the first expansion valve 42 is closed;

[0153] If it is not established, it is judged whether the electric drive temperature control assembly 20 exchanges heat through the second channel 412, if yes, the second circulating pump 32 is closed; if not, the first expansion valve 42, the second expansion valve 43 and the second circulating pump 32 are closed.

[0154] S92, the step S91 is repeatedly executed until the temperature control system exits the defrosting mode.

[0155] The system can still realize the normal operation of the electric drive temperature control assembly 20 and the battery temperature control assembly 30 in the defrosting mode, and the control method of the electric drive temperature control assembly 20 and the battery temperature control assembly 30 in the indoor refrigeration mode is the same, at this time, the heat recovered by the heat recovery heat exchanger 41 is beneficial to help the air conditioning system to defrost better.

[0156] It can be understood that the temperature control system provided by the embodiment of the application further includes a controller, and the controller stores control instructions, and when the control instructions are executed by the controller, the above-mentioned control method can be realized, that is, the temperature control system can be controlled to operate according to the above-mentioned control method through the controller.

[0157] As can be seen from the above, the temperature control system, the electric vehicle and the control method of the temperature control system provided by the embodiment of the application can realize heat dissipation of the battery assembly in various modes such as indoor refrigeration and indoor heating, can realize waste heat recovery of the electric drive system and the battery assembly in the indoor heating mode, improve the refrigerant temperature at the compressor inlet, reduce the compression amount of the compressor, thereby improving the energy efficiency ratio of the compressor, which is beneficial to reduce energy consumption and also improves the heating effect of the compressor. It organically combines the indoor temperature control assembly, the electric drive temperature control assembly and the battery temperature control assembly, reduces the overall volume and weight of the system, and is beneficial to prolong the endurance of the electric vehicle. And it integrates the outdoor heat exchanger and the electric drive heat radiator, shares the outdoor fan, further reduces the occupied space of the system, reduces the use of components, and is beneficial to reduce the investment cost of the equipment. At the same time, it can meet the heat dissipation needs of the electric drive system and the battery assembly under various working conditions, and the three systems (indoor temperature control assembly, electric drive temperature control assembly and battery temperature control assembly) are independent of each other and can work independently without interference.

[0158] By integrating the electric drive temperature control components and battery temperature control components into the air conditioning system of the indoor temperature control components, the space occupied by the independent systems in the vehicle is reduced, thereby releasing more space in the vehicle and improving the flexibility of the internal layout of the vehicle. The integrated system reduces additional components and pipes, reduces the weight of the vehicle, and helps to improve the energy efficiency and performance of the vehicle. At the same time, it also reduces the manufacturing and maintenance costs, and the integrated system can reduce the investment of materials and labor. The optimization of the system control logic enables the heat of the electric drive system and the battery components to be recovered during indoor heating and defrosting modes, improving the energy utilization efficiency and further enhancing the energy efficiency and comfort of the system. At the same time, the integrated system design improves the compatibility with different vehicle models, facilitating the application and promotion on various vehicle models.

[0159] It should be noted that in this paper, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "includes a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0160] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A temperature control system, characterized by, The indoor temperature control assembly, the electric drive temperature control assembly, the battery temperature control assembly and the heat recovery assembly are included. The indoor temperature control assembly is used for circulating refrigerant and includes a compressor, an indoor heat exchanger and an outdoor heat exchanger which are connected in circulation to realize a heating cycle. The heat recovery assembly includes a heat recovery heat exchanger, a first expansion valve and a second expansion valve, the heat recovery heat exchanger includes a first channel, a second channel and a third channel, one end of the first expansion valve is connected between the indoor heat exchanger and the outdoor heat exchanger, the other end is connected with one end of the first channel, the other end of the first channel is connected with a suction port of the compressor, one end of the second expansion valve is connected between the indoor heat exchanger and the outdoor heat exchanger, the other end is connected with one end of the first channel, the other end of the first channel is connected with the suction port of the compressor, refrigerant in the first channel is used for heat exchange with the second channel and the third channel respectively. The electric drive temperature control assembly includes an electric drive heat exchange module, the electric drive heat exchange module is connected in series with the second channel and can be used for heat exchange with an electric drive system. The battery temperature control assembly includes a battery heat exchange module, the battery heat exchange module is connected in series with the third channel and can be used for heat exchange with a battery assembly. The indoor temperature control assembly further includes a gas-liquid separator and a four-way reversing valve, the four-way reversing valve includes a first interface, a second interface, a third interface and a fourth interface, an outlet of the gas-liquid separator is connected with a suction port of the compressor, an inlet of the gas-liquid separator is connected with the fourth interface and the first channel, an exhaust port of the compressor is connected with the first interface. The indoor temperature control assembly further includes the indoor heat exchanger, a third expansion valve, a dry filter and the outdoor heat exchanger which are connected in series, one port of the indoor heat exchanger is connected with the third interface, one port of the outdoor heat exchanger is connected with the second interface.

2. The temperature control system of claim 1, wherein, An outlet of the first channel is connected with a pipeline between the gas-liquid separator and the fourth interface, an inlet of the first channel is connected with the first expansion valve and the second expansion valve respectively, an inlet of the first expansion valve is connected with a pipeline between the indoor heat exchanger and the third expansion valve, an inlet of the second expansion valve is connected with a pipeline between the dry filter and the third expansion valve.

3. The temperature control system of claim 1, wherein, The electric drive temperature control assembly further includes a first circulating pump, an outlet of the first circulating pump is connected with an inlet of the electric drive heat exchange module, an inlet of the first circulating pump is connected with an outlet of the second channel, an outlet of the electric drive heat exchange module is connected with an inlet of the second channel.

4. The temperature control system of claim 3, wherein, The electric drive temperature control assembly further includes an electric drive radiator and a control valve, the electric drive radiator is connected with the second channel, the control valve is used for controlling the flow of the cold carrier flowing out of the electric drive heat exchange module to flow into the second channel or the electric drive radiator.

5. The temperature control system of claim 1, wherein, The battery temperature control assembly further includes a second circulating pump, an outlet of the battery heat exchange module is connected with an inlet of the third channel, an inlet of the battery heat exchange module is connected with an outlet of the second circulating pump, an inlet of the second circulating pump is connected with an outlet of the third channel.

6. The temperature control system of claim 4, wherein, Further comprising an indoor fan and an outdoor fan, the outdoor heat exchanger and the electric-driven heat dissipator are integrated, the indoor fan is used to improve the air flow rate at the indoor heat exchanger, and the outdoor fan is used to improve the air flow rate at the outdoor heat exchanger and the electric-driven heat dissipator.

7. An electric vehicle, characterized by The temperature control system according to any one of claims 1 to 6.

8. A control method of a temperature control system, characterized by, The temperature control system according to any one of claims 1 to 6, wherein the electric-driven temperature control assembly further comprises a first circulating pump, an electric-driven heat dissipator and a control valve, the first circulating pump and the electric-driven heat exchanger module are connected in series, the electric-driven heat dissipator and the second channel are connected in parallel; and the battery temperature control assembly further comprises a second circulating pump. The temperature control system in the indoor heating mode comprises an electric-driven temperature control assembly control step and a battery temperature control assembly control step, The electric-driven temperature control assembly control step comprises: S10, setting a preset outlet water temperature T13 of the electric-driven heat exchanger module; S11, detecting the actual outlet water temperature T12 of the electric-driven heat exchanger module in real time, and determining whether T12>T13 is established, If yes, controlling the control valve to make the refrigerant flowing out of the electric-driven heat exchanger module flow into the electric-driven heat dissipator, starting the outdoor fan and the first circulating pump; determining whether the battery temperature control assembly is in working state, if yes, keeping the current state unchanged; if no, closing the first expansion valve; If no, determining whether the indoor temperature control assembly is started, if yes, controlling the control valve to make the refrigerant flowing out of the electric-driven heat exchanger module flow into the second channel, starting the first circulating pump and the first expansion valve, and closing the second expansion valve; if no, determining whether the battery temperature control assembly is in working state, if the battery temperature control assembly is in working state, closing the first circulating pump; if the battery temperature control assembly is not in working state, closing the first expansion valve and the first circulating pump; S12, repeating step S11 until the temperature control system exits the heating mode; The battery temperature control assembly control step comprises: S20, setting a preset outlet water temperature T23 of the battery heat exchanger module; S21, detecting the actual outlet water temperature T22 of the battery heat exchanger module in real time, and determining whether T22>T23 is established, If yes, determining whether the indoor temperature control assembly is started, if yes, starting the first expansion valve and the second circulating pump, and closing the second expansion valve; if no, starting the compressor, the first expansion valve and the second circulating pump, and closing the second expansion valve; If no, determining whether the electric-driven temperature control assembly exchanges heat through the second channel, if yes, closing the second circulating pump; if no, closing the first expansion valve, the second expansion valve and the second circulating pump; S22, repeating step S21 until the temperature control system exits the heating mode.

9. The control method of a temperature control system according to claim 8, wherein The temperature control system in the indoor cooling mode comprises an electric-driven temperature control assembly control step and a battery temperature control assembly control step, The electric-driven temperature control assembly control step comprises: S30, setting a preset outlet water temperature T33 of the electric-driven heat exchanger module; S31, the actual outlet water temperature T32 of the electric drive heat exchange module is detected in real time, it is judged whether T32>T33 is established, if yes, the control valve is controlled to make the cold carrier flowing out of the electric drive heat exchange module flow into the electric drive radiator, the outdoor fan and the first circulating pump are started; if not, the first circulating pump and the outdoor fan are closed; S32, step S31 is repeatedly executed until the electric drive system is closed; The battery temperature control component control step comprises: S40, the preset outlet water temperature T43 of the battery heat exchange module is set; S41, the actual outlet water temperature T42 of the battery heat exchange module is detected in real time, it is judged whether T42>T43 is established, If established, it is judged whether the indoor temperature control component is started, if yes, the second expansion valve and the second circulating pump are started, and the first expansion valve is closed; if not, the compressor, the second expansion valve and the second circulating pump are started, and the first expansion valve is closed; If not established, the second circulating pump and the second expansion valve are closed; S42, step S41 is repeatedly executed until the battery component stops working.

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