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

Abstract

The invention provides a temperature control system, an electric automobile 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 a refrigerant and comprises a compressor, an indoor heat exchanger and an outdoor heat exchanger which are circularly communicated. 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. The refrigerant in the first channel is used for exchanging heat with the secondary refrigerant in the second channel and the secondary refrigerant in the third channel. The electrically-driven temperature control assembly comprises an electrically-driven heat exchange module connected with the second channel in series and used for exchanging heat with an electrically-driven system. The battery temperature control assembly comprises a battery heat exchange module connected with the third channel in series and used for exchanging heat with the battery assembly. According to the temperature control system, the electric automobile and the control method of the temperature control system, the size and weight of the system are reduced, waste heat is fully utilized, and energy consumption is reduced.

Description

Technical Field

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

[0002] The existing automobile air conditioning system refrigerates the vehicle body by circulating the refrigerant through the compressor, outdoor heat exchanger, outdoor fan, throttle valve, indoor heat exchanger, indoor fan, etc. The cooling of the vehicle electric drive system is achieved by circulating the coolant through the water pump, water tank, heat exchanger, fan, etc. The two systems operate independently. The vehicle battery thermal management system is also either independently set up or integrated into the air conditioning system, and a heat exchanger is connected in parallel with the indoor heat exchanger to dissipate the battery coolant.

[0003] In the process of realizing this application, the inventor found that there are at least the following problems in the prior art: the existing automobile air conditioning system, the cooling system of the vehicle electric drive system and the vehicle battery thermal management system include two or three independent systems, and each system is relatively independent, which not only takes up more vehicle body space, but also increases the weight of the system and the vehicle. In addition, there is no organic combination between the various systems, so that the heat of the electric drive system and the battery assembly cannot be utilized. For example, if the indoor heat exchanger is connected in parallel with a heat exchanger to dissipate heat from the battery assembly, the heat dissipation of the battery assembly cannot be achieved in the indoor heating mode. Summary of the invention

[0004] Based on this, the present application provides a temperature control system, an electric vehicle and a control method for the temperature control system to improve the problems in the prior art that the system waste heat cannot be utilized and the battery components cannot be cooled during indoor heating.

[0005] To achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a temperature control system, including an indoor temperature control component, an electric drive temperature control component, a battery temperature control component, and a heat recovery component;

[0007] The indoor temperature control assembly is used to circulate refrigerant, and includes a compressor, an indoor heat exchanger and an outdoor heat exchanger that are cyclically connected to realize a heating cycle;

[0008] The heat recovery component includes a heat recovery heat exchanger, a first expansion valve and a second expansion valve, and 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, and the other end is connected to one end of the first channel, and the other end of the first channel is connected to the air intake 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 to one end of the first channel, and the other end of the first channel is connected to the air intake port of the compressor; the refrigerant in the first channel is used to exchange heat with the secondary coolant in the second channel and the third channel respectively;

[0009] The electric drive temperature control component includes an electric drive heat exchange module, which is connected in series with the second channel and can be used to exchange heat with the electric drive system;

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

[0011] In one embodiment, the indoor temperature control component further includes a gas-liquid separator and a four-way reversing valve, and the four-way reversing valve includes a first interface, a second interface, a third interface and a fourth interface; the outlet of the gas-liquid separator is connected to the air intake of the compressor, the inlet of the gas-liquid separator is connected to the fourth interface and the first channel, and the exhaust port of the compressor is connected to the first interface;

[0012] The indoor temperature control component also includes the indoor heat exchanger, the third expansion valve, the drying filter and the outdoor heat exchanger connected in series in sequence; one port of the indoor heat exchanger is connected to the third interface, and one port of the outdoor heat exchanger is connected to the second interface.

[0013] In one embodiment, 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 to 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 drying filter and the third expansion valve.

[0014] In one embodiment, the electric drive temperature control component also includes a first circulation pump, the outlet of the first circulation pump is connected to the inlet of the electric drive temperature control module, the inlet of the first circulation pump is connected to the outlet of the second channel, and the outlet of the electric drive temperature control module is connected to the inlet of the second channel.

[0015] In one embodiment, the electric drive temperature control component also includes an electric drive radiator and a control valve. The electric drive radiator and the second channel are connected in parallel. The control valve is used to control the coolant flowing out of the electric drive heat exchange module to flow into the second channel or into the electric drive radiator.

[0016] In one embodiment, the battery temperature control assembly also includes a second circulation pump, the outlet of the battery heat exchange module is connected to the inlet of the third channel, the inlet of the battery heat exchange module is connected to the outlet of the second circulation pump, and the inlet of the second circulation pump is connected to the outlet of the third channel.

[0017] In one embodiment, the temperature control system also includes 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, an embodiment of the present application provides an electric vehicle, comprising the temperature control system as described above.

[0019] In a third aspect, an embodiment of the present application provides a control method for a temperature control system, which is applied to the temperature control system as described above, wherein the electric drive temperature control component further includes a first circulation pump, an electric drive radiator and a control valve, the first circulation pump and the electric drive heat exchange module are connected in series, and the electric drive radiator and the second channel are connected in parallel;

[0020] The temperature control system includes an electric drive temperature control component control step and a battery temperature control component control step in the indoor heating mode.

[0021] The electric drive temperature control component control steps include:

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

[0023] S11, real-time detection of the actual outlet water temperature T12 of the electric drive heat exchange module, and judging whether T12>T13 is established,

[0024] If so, control the control valve to make the coolant flowing out of the electric drive heat exchange module flow into the electric drive radiator, turn on the outdoor fan and the first circulation pump; determine whether the battery temperature control component is in working state, if so, keep the current state unchanged; if not, close the first expansion valve;

[0025] If not, it is determined whether the indoor temperature control component is turned on. If so, the control valve is controlled to allow the coolant flowing out of the electric drive heat exchange module to flow into the second channel, the first circulation pump and the first expansion valve are turned on, and the second expansion valve is closed; if not, it is determined whether the battery temperature control component is in a working state. If so, the first circulation pump is closed; if not, the first expansion valve and the first circulation pump are closed;

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

[0027] The battery temperature control component control steps include:

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

[0029] S21, real-time detection of the actual outlet water temperature T22 of the battery heat exchange module, and judging whether T22>T23 is established,

[0030] If yes, then determine whether the indoor temperature control component is turned on, if yes, then turn on the first expansion valve and the second circulation pump, and turn off the second expansion valve; if no, then turn on the compressor, the first expansion valve and the second circulation pump, and turn off the second expansion valve;

[0031] If not, determining whether the electric drive temperature control component exchanges heat through the second channel, and if so, turning off the second circulation pump; if not, turning off the first expansion valve, the second expansion valve and the second circulation pump;

[0032] S22. Repeat step S21 until the temperature control system exits the heating mode.

[0033] In one embodiment, the temperature control system includes an electric drive temperature control component control step and a battery temperature control component control step in the indoor cooling mode.

[0034] The control steps of the electric drive temperature control component include:

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

[0036] S31, real-time detection of the actual outlet water temperature T32 of the electric drive heat exchange module is performed to determine whether T32>T33 is established. If so, the control valve is controlled to allow the coolant flowing out of the electric drive heat exchange module to flow into the electric drive radiator, and the outdoor fan and the first circulation pump are turned on; if not, the first circulation pump and the outdoor fan are turned off;

[0037] S32, repeating step S31 until the electric drive system is turned off;

[0038] The battery temperature control component control steps include:

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

[0040] S41, real-time detection of the actual outlet water temperature T42 of the battery heat exchange module to determine whether T42>T43 is established.

[0041] If yes, then determine whether the indoor temperature control component is turned on, if yes, then turn on the second expansion valve and the second circulation pump, and turn off the first expansion valve; if no, then turn on the compressor, the second expansion valve and the second circulation pump, and turn off the first expansion valve;

[0042] If not, closing the second circulation pump and the second expansion valve;

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

[0044] The present application has at least the following beneficial effects: the temperature control system provided by the present application organically combines the indoor temperature control component, the electric drive temperature control component and the battery temperature control component, reducing the overall volume and weight of the system, and by setting a heat recovery component, in the indoor heating mode, by opening the first expansion valve, the heat of the electric drive system and the battery component can be recovered, which can increase the refrigerant temperature at the compressor inlet, thereby reducing the compression volume of the compressor, improving the energy efficiency ratio of the compressor, and thus reducing energy consumption, effectively extending the endurance of the electric vehicle, and also realizing the heat dissipation of the battery component during indoor heating. In addition, the battery temperature control component can operate relatively independently from the indoor temperature control component without affecting each other.

[0045] In summary, the present application can improve the problems in the prior art that the waste heat of the system cannot be utilized and the battery components cannot be cooled during indoor heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 Schematic diagram of the structure of a temperature control system according to an embodiment of the present application.

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

[0048] Figure 3 for Figure 1 Schematic diagram of liquid flow in the temperature control system in indoor heating mode (when T12>T13).

[0049] Figure 4 for Figure 1 Schematic diagram of liquid flow direction of the temperature control system in indoor heating mode (when T12≤T13).

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

[0051] Figure 6 for Figure 1 Schematic diagram of liquid flow in the temperature control system in defrost mode (when T12≤T13).

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

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

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

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

[0056] Fig.11 This is a flow chart of the control steps of the electric drive temperature control component of the temperature control system in the indoor cooling mode of an embodiment of the present application.

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

[0058] Note: Figures 3 to 6 In the figure, the solid arrow indicates the flow direction of the refrigerant, the solid hollow arrow indicates the flow direction of the coolant of the electric drive temperature control component, and the dotted hollow arrow indicates the flow direction of the coolant of the battery temperature control component.

[0059] The meanings of the symbols in the accompanying 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. Dry filter; 17. Outdoor heat exchanger; 171. Outdoor fan; 18. Pressure sensor; 19. Condensation temperature detection device;

[0061] 20. Electric drive temperature control component; 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 the present application is further elaborated in detail below in conjunction with the accompanying drawings and specific embodiments of the specification.

[0065] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those 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" used herein includes any and all combinations of one or more related listed items.

[0066] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0067] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to 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 to circulate the refrigerant, and includes a compressor 11, an indoor heat exchanger 14, and an outdoor heat exchanger 17 that are cyclically connected. It can be understood that the compressor 11, the indoor heat exchanger 14, and the outdoor heat exchanger 17 that are cyclically connected refer to: the exhaust port of the compressor 11 is connected to one end of the indoor heat exchanger 14, the other end of the indoor heat exchanger 14 is connected to one end of the outdoor heat exchanger 17, and the other end of the outdoor heat exchanger 17 is connected to the air intake port of the compressor 11 to realize the heating cycle.

[0070] The heat recovery assembly 40 includes a heat recovery heat exchanger 41, a first expansion valve 42 and a second expansion valve 43. The heat recovery heat exchanger 41 includes 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, and the other end of the first expansion valve 42 is connected to one end of the first channel 411, and the other end of the first channel 411 is connected to the air intake 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, and the other end of the second expansion valve 43 is connected to one end of the first channel 411, and the other end of the first channel 411 is connected to the air intake of the compressor 11. The refrigerant in the first channel 411 is used to exchange heat with the refrigerant in the second channel 412 and the third channel 413 respectively. The heat recovery heat exchanger 41 in this embodiment is a three-channel plate exchanger, that is, the first channel 411 can exchange heat with the second channel 412 and the third channel 413 respectively.

[0071] The electric drive temperature control component 20 includes an electric drive heat exchange module 21, which is connected in series with the second channel 412 for exchanging heat with the electric drive system, which includes the motor and electric control components of the electric vehicle.

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

[0073] Specifically, in this embodiment, the indoor temperature control component 10 also includes a gas-liquid separator 12 and a four-way reversing valve 13, and the four-way reversing valve 13 includes 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 to the air intake of the compressor 11, the inlet of the gas-liquid separator 12 is respectively connected to the fourth interface 134 and the first channel 411, and the exhaust port of the compressor 11 is connected to the first interface 131. It can be understood that one end of the first expansion valve 42 and the second expansion valve 43 are respectively connected to one end of the first channel 411, and the other end of the first channel 411 is connected to the inlet of the gas-liquid separator 12, so that the refrigerant in the first channel 411 can flow back to the compressor 11.

[0074] The indoor temperature control component 10 also includes an indoor heat exchanger 14, a third expansion valve 15, a filter dryer 16 and an outdoor heat exchanger 17 connected in series. One port of the indoor heat exchanger 14 is connected to the third interface 133, and one port of the outdoor heat exchanger 17 is connected to the second interface 132. It can be understood that when heating, the first interface 131 and the third interface 133 are connected, and the second interface 132 and the fourth interface 134 are connected. When cooling, the first interface 131 and the second interface 132 are connected, and the third interface 133 and the fourth interface 134 are connected. In this embodiment, another port of the indoor heat exchanger 14 is connected to the first expansion valve 42 and the third expansion valve 15 respectively, and another port of the outdoor heat exchanger 17 is connected to one end of the filter dryer 16, and the other end of the filter dryer 16 is connected to 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 this embodiment can respectively adopt coil heat exchangers, and the indoor heat exchanger 14 is correspondingly provided with an indoor fan 141, which is used to increase the air flow rate at the indoor heat exchanger 14 to achieve forced convection heat exchange, and the outdoor heat exchanger 17 is correspondingly provided with an outdoor fan 171. It can be understood that the fan can be arranged on the air outlet side or the air inlet side of the heat exchanger to improve the heat exchange effect of the heat exchanger by forced convection heat exchange. In order to improve the operation accuracy and stability of the indoor temperature control component 10, a pressure detection device can also be arranged, for example, a pressure sensor 18 can be arranged on the pipeline on the inlet side of the compressor 11 (that is, the air intake side of the compressor 11), and a pressure sensor 18 can also be arranged on the pipeline on the outlet side of the compressor 11 (that is, the exhaust side of the compressor 11). An indoor temperature detection device can also be arranged near the indoor heat exchanger 14, and the indoor temperature detection device can be, for example, a temperature sensor.

[0076] When the indoor temperature control assembly 10 of this embodiment is in operation, the compressor 11 and the third expansion valve 15 need to be kept open. Figure 3 and Figure 4As shown, when the indoor heating mode is operated, first, the first interface 131 and the third interface 133 of the four-way reversing valve 13 are connected, and 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, and enters the indoor heat exchanger 14 after passing through the first interface 131 and the third interface 133 of the four-way reversing valve 13, and exchanges heat with the indoor gas through the forced convection of the indoor fan 141. The indoor gas is heated, and the refrigerant releases heat and condenses into medium-temperature and high-pressure liquid refrigerant. After throttling by the third expansion valve 15, the refrigerant enters the outdoor heat exchanger 17 through the drying filter 16. The refrigerant in the outdoor heat exchanger 17 exchanges heat with the outdoor air through the forced convection of the outdoor fan 171, absorbs heat and evaporates to form a low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant enters the gas-liquid separator 12 through the second interface 132 and the fourth interface 134, and then returns to the compressor 11, completing a heating cycle. like Figure 5 As shown, when the indoor cooling mode is operated, first, the first interface 131 and the second interface 132 of the four-way reversing valve 13 are connected, and the third interface 133 and the fourth interface 134 are connected. The low-temperature and low-pressure gaseous refrigerant is compressed into high-temperature and high-pressure steam by the compressor 11, and enters the outdoor heat exchanger 17 after passing through the first interface 131 and the second interface 132 of the four-way reversing valve 13, and exchanges heat with the outdoor gas through the forced convection of the outdoor fan 171. The refrigerant releases heat and condenses into medium-temperature and high-pressure liquid refrigerant. After passing through the drying filter 16, it enters the indoor heat exchanger 14 after throttling by the third expansion valve 15. The refrigerant in the indoor heat exchanger 14 exchanges heat with the indoor air through the forced convection of the indoor fan 141, and the indoor gas is cooled. The refrigerant absorbs heat and evaporates to form a low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant enters the gas-liquid separator 12 through the third interface 133 and the fourth interface 134 and returns to the compressor 11, completing a refrigeration cycle.

[0077] like Figure 1 and Figure 2 As shown, the heat recovery heat exchanger 41 of the heat recovery assembly 40 of this 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 in series with the first expansion valve 42 through a pipeline, and the inlet of the first channel 411 is also connected 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 drying filter 16 and the third expansion valve 15.

[0078] The electric drive temperature control assembly 20 of this embodiment also includes a first circulation pump 22, an electric drive radiator 23 and a control valve 24. The outlet of the first circulation pump 22 is connected to the inlet of the electric drive temperature control module, the inlet of the first circulation pump 22 is connected to the outlet of the second channel 412, and the outlet of the electric drive temperature control module is connected to the inlet of the second channel 412. The coolant in the second channel 412 is used to realize the waste heat recovery function when exchanging heat with the refrigerant in the first channel 411. In the indoor heating mode, the refrigerant temperature 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, and thus reducing energy consumption. At the same time, the heating effect of the compressor 11 is enhanced. The control valve 24 in this embodiment can be an electric three-way valve, which includes 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, the second outlet is connected to the inlet of the electric drive radiator 23, and the outlet of the electric drive radiator 23 is connected to the inlet of the first circulation pump 22, that is, the electric drive radiator 23 and the second channel 412 are connected in parallel. The control valve 24 is used to control the coolant flowing out of the electric drive heat exchange module 21 to flow into the second channel 412 or into the electric drive radiator 23. The setting of the electric drive radiator 23 is to meet the heat dissipation requirements 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 radiator 23 and the outdoor heat exchanger 17 can be integrated. At the same time, the two can also share the outdoor fan 171, reducing the number of fans used, thereby reducing 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 radiator 23 to achieve forced convection heat exchange.

[0079] In some embodiments, the electric drive temperature control assembly 20 may further include a first expansion water tank 25 connected to the first circulation 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 circulation pump 22 and the outlet of the second channel 412. The first expansion water tank 25 can supplement the coolant of the system of the electric drive temperature control assembly 20 before the first circulation pump 22 discharges water, and can also play a role in exhausting gas after the electric drive heat exchange module 21 discharges liquid.

[0080] In order to improve the degree of automation of the temperature control system, a first water temperature detection device 26 can also be set. For example, a temperature sensor can be set on the pipeline between the outlet of the electric drive heat exchange module 21 and the inlet of the control valve 24 to detect the temperature of the coolant 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. 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, such as 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 turned on, 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 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 further 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 further 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, and 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 supplement the coolant of the system of the battery temperature control assembly 30 before the second circulation pump 32 discharges water, and can also play a role in exhausting gas after the battery heat exchange module 31 discharges liquid.

[0083] In order to improve the degree of automation of the temperature control system, a second water temperature detection device 34 can also be set. For example, a temperature sensor can be set on the pipeline between the outlet of the battery heat exchange module 31 and the inlet of the third channel 413 to detect the temperature of the coolant flowing out of the outlet of the battery heat exchange module 31.

[0084] The preset water outlet temperature T3 of the battery heat exchange module 31 can be set, and the actual water outlet temperature T2 of the battery heat exchange module 31 can be detected in real time by the second water temperature detection device 34. When T2>T3, the heat recovery heat exchanger 41 is required to dissipate heat from the battery assembly. There are three situations at this time, such as Figure 3 and 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 turned on, the first expansion valve 42 and the second circulation pump 32 are turned on, and the second expansion valve 43 is closed. The coolant in the third channel 413 and the refrigerant in the first channel 411 are heat exchanged to achieve cooling of the battery assembly. At this time, the flow direction of the refrigerant is the same as the flow direction when the heat of the electric drive system is recovered through the second channel 412, and no further description is given; Figure 5 As shown, when the indoor temperature control component 10 executes the indoor cooling mode and the compressor 11 and the third expansion valve 15 are both turned on, the second expansion valve 43 and the second circulation pump 32 are turned on, and the first expansion valve 42 is closed. The coolant in the third channel 413 and the refrigerant in the first channel 411 are heat exchanged to achieve cooling of the battery assembly. 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 passes through the third expansion valve 15 and enters the indoor heat exchanger 14, and the second path passes through the second expansion valve 43 and enters the first channel 411 of the heat recovery heat exchanger 41. The refrigerant flowing out of the heat recovery heat exchanger 41 merges with the first path of refrigerant and returns to the compressor 11. There is another situation that the indoor temperature control component 10 is not started (the compressor 11 and the third expansion valve 15 are both closed). At this time, the battery temperature control component 30 can be started separately, the compressor 11, the second circulation 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 circulation 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, after the refrigerant flows out of the exhaust port of the compressor 11, it 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 sequence, and then flows back to the compressor 11 (or the refrigerant flows out of the exhaust port of the compressor 11, passes through the indoor heat exchanger 14, the first expansion valve 42, the first channel 411 and the gas-liquid separator 12 in sequence, and then flows back to the compressor 11). When T2≤T3, it is not necessary to dissipate heat from the battery assembly through the heat recovery heat exchanger 41.

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

[0086] The embodiment of the present application also provides a control method of a temperature control system, which is applied to the temperature control system of the above embodiment. The indoor temperature control component 10 of the temperature control system includes 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 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 heating mode, the four-way reversing valve 13 will switch to the first interface 131 and the third interface 133 being connected, and the second interface 132 and the fourth interface 134 being connected.

[0088] like Figure 7 As shown, the control steps of the indoor temperature control component 10 include:

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

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

[0091] S51, using the indoor temperature detection device to detect the actual indoor temperature T51 in real time, and determine whether T50>T51 is established,

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

[0093] If not, determine whether the battery temperature control component 30 is turned on. If not, turn off the compressor 11, the third expansion valve 15, the indoor fan 141 and the outdoor fan 171. If so, turn off the third expansion valve 15 and the outdoor fan 171.

[0094] This step is to determine whether the actual indoor temperature T51 is lower than the indoor preset temperature T50. If it is lower than the indoor preset temperature T50, the indoor temperature needs to be heated. If it is not lower than the indoor preset temperature T50, there is no need to heat the indoor temperature, and the indoor temperature control component 10 can be kept in standby mode.

[0095] Here, the standard for judging whether the indoor temperature control component 10 is turned on is that both the compressor 11 and the third expansion valve 15 are turned on. When T50≤T51, if the battery temperature control component 30 is in the on state (the second circulation pump 32 is in the on state, which can be judged as the battery temperature control component 30 is in the on state), there is no need to turn off the compressor 11, only turn off the outdoor fan 171, and keep the third expansion valve 15 in the closed state, but the first expansion valve 42 can be opened, so that the refrigerant flowing out of the indoor heat exchanger 14 enters the first channel 411 through the first expansion valve 42 to exchange heat with the coolant in the third channel 413, thereby cooling the battery component.

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

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

[0098] like Figure 8 As shown, the control steps of the electric drive temperature control component 20 include:

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

[0100] S11, real-time detection of the actual outlet water temperature T12 of the electric drive heat exchange module 21, and judging whether T12>T13 is established.

[0101] If yes, the control valve 24 is controlled to make the coolant 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 circulation pump 22 are turned on; it is determined whether the battery temperature control component 30 is in working state, if yes, the current state is kept unchanged; if not, the first expansion valve 42 is closed;

[0102] If not, determine whether the indoor temperature control component 10 is turned on. If so, control the control valve 24 to allow the refrigerant flowing out of the electric drive heat exchange module 21 to flow into the second channel 412, turn on the first circulation pump 22 and the first expansion valve 42, and close the second expansion valve 43; if not, determine whether the battery temperature control component 30 is in working state. If so, turn off the first circulation pump 22; if not, turn off the first expansion valve 42 and the first circulation pump 22.

[0103] This step is that when T12>T13, it means that the heat dissipation demand of the electric drive system is relatively high at this time. It can be considered that the heat recovery heat exchanger 41 cannot meet its heat dissipation demand, and the electric drive radiator 23 is needed 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 connected (the first outlet is cut off), so that the coolant 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 circulation pump 22 are turned on at the same time. At this time, it is also necessary to determine whether the battery temperature control component 30 is in working state (the second circulation pump 32 is turned on to determine whether the battery temperature control component 30 is in working state). If the battery temperature control component 30 is in working state, then keep the current state without adjustment; if the battery temperature control component 30 is not in working state, then it is necessary to close the first expansion valve 42 and close the inlet and the first outlet of the control valve 24.

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

[0105] like Fig. 9 As shown, the control steps of the battery temperature control component 30 include:

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

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

[0108] If yes, it is determined whether the indoor temperature control component 10 is turned on. If yes, the first expansion valve 42 and the second circulation pump 32 are turned on, and the second expansion valve 43 is closed; if no, the compressor 11, the first expansion valve 42 and the second circulation pump 32 are turned on, and the second expansion valve 43 is closed;

[0109] If not, determine whether the electric drive temperature control component 20 exchanges heat through the second channel 412. If so, close the second circulation pump 32; if not, close the first expansion valve 42, the second expansion valve 43 and the second circulation pump 32.

[0110] When T22 > T23, it indicates that the battery module needs to dissipate heat, and the compressor 11 needs to be turned on 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 turned on. If the indoor temperature control component 10 is in the on state, then the compressor 11 is already in the on state at this time, and only the first expansion valve 42 and the second circulation pump 32 need to be turned on. If the indoor temperature control component 10 is not turned on, then the compressor 11 also needs to be turned on at this time. In the indoor heating mode, the second expansion valve 43 also needs to be closed so that the refrigerant can be diverted 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 is not adjusted. At the same time, it is determined 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 open state, it can be determined that the electric drive temperature control component 20 exchanges heat through the second channel 412 to achieve the heat recovery function). At this time, the first expansion valve 42 is kept in the open state, the second expansion valve 43 is kept 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 is kept 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 make its first interface 131 and second interface 132 conduct, and its third interface 133 and fourth interface 134 conduct.

[0114] As Fig.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. Turn on 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 determined whether T60 < T61 holds.

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

[0119] If not, determine whether the battery temperature control component 30 is turned on. If so, close the first expansion valve 42 and keep the second expansion valve 43 open; if not, close the third expansion valve 15 and the compressor 11, and keep the first expansion valve 42 and the second expansion valve 43 closed.

[0120] This step is to determine whether the actual indoor temperature T61 is higher than the indoor preset temperature T60. If it is higher than the indoor preset temperature T60, the indoor temperature needs to be cooled. If it is not higher than the indoor preset temperature T60, the indoor temperature does not need to be cooled.

[0121] S62. Repeat step S61 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 still in the indoor cooling mode, the actual indoor temperature T61 will be detected all the time. As long as it is higher than T60, cooling will be performed, and if it is not higher than T60, cooling will be stopped. When the temperature control system exits the indoor cooling mode, step S61 will also stop, and the actual indoor temperature T61 will no longer be monitored in real time.

[0123] like Fig.11 As shown, the control steps of the electric drive temperature control component 20 include:

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

[0125] S31, real-time detection of the actual outlet water temperature T32 of the electric drive heat exchange module 21 is performed to determine whether T32>T33 is established. If so, the control valve 24 is controlled to allow the refrigerant flowing out of the electric drive heat exchange module 21 to flow into the electric drive radiator 23, and the outdoor fan 171 and the first circulation pump 22 are turned on; if not, the first circulation pump 22 and the outdoor fan 171 are turned off.

[0126] At this time, the indoor temperature control component 10 is in the indoor cooling mode. In this mode, there is no need to recover the heat of the electric drive system. Therefore, it is only necessary to use the electric drive radiator 23 to cool the electric drive heat exchange module 21 when the actual water outlet temperature T32 exceeds the preset water outlet temperature T33 of the electric drive heat exchange module 21. When T32 does not exceed T33, there is no need to cool the refrigerant.

[0127] When T32>T33, the inlet and the second outlet of the control valve 24 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 at the same time, the outdoor fan 171 and the first circulation pump 22 are turned on. When T32≤T33, the first circulation pump 22 and the outdoor fan 171 are turned off, 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 shut down.

[0129] like Fig.12 As shown, the control steps of the battery temperature control component 30 include:

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

[0131] S41, real-time detection of the actual outlet water temperature T42 of the battery heat exchange module 31, and determination of whether T42>T43 is established.

[0132] If yes, it is determined whether the indoor temperature control component 10 is turned on. If yes, the second expansion valve 43 and the second circulation pump 32 are turned on, and the first expansion valve 42 is closed; if no, the compressor 11, the second expansion valve 43 and the second circulation pump 32 are turned on, and the first expansion valve 42 is closed;

[0133] If not, the second circulation pump 32 and the second expansion valve 43 are closed.

[0134] At this time, the indoor temperature control component 10 is in the indoor cooling mode, in which mode the battery component can still be cooled. At the same time, the battery temperature control system can operate independently in either mode. As long as the battery component has a heat dissipation demand, the battery temperature control component 30 can be turned on to cool it. When T42>T43, it means that the temperature of the battery component is high and needs to be cooled. If the indoor temperature control component 10 is turned on at this time, it is only necessary to turn on the second expansion valve 43 and the second circulation pump 32, and keep the first expansion valve 42 closed; if the indoor temperature control component 10 is not turned on, the compressor 11 also needs to be turned on.

[0135] S42. Repeat step S41 until the battery assembly stops working.

[0136] When the temperature control system is in ventilation mode, for the indoor temperature control component 10, it is only necessary to turn on its indoor fan 141 and keep it in standby mode. The control method for the electric drive temperature control component 20 is the same as the control method in the indoor cooling mode, which will not be repeated here. For the control method of the battery temperature control component 30, you can choose the control method in the indoor cooling mode, or you can choose the control method in the indoor heating mode. Both can be implemented. Specifically, you can choose a more reasonable control method according to the temperature conditions of the environment. For example, when the outdoor ambient temperature is high, you can choose the control method in the indoor cooling mode. When the outdoor ambient temperature is low, you can choose the control method in the indoor heating mode. However, at this time, because the indoor temperature control component 10 is in standby mode, the compressor 11 and the third expansion valve 15 are not turned on. Therefore, in the control step, there is no need to consider whether the indoor temperature control component 10 is turned on.

[0137] In the indoor heating mode, the outdoor heat exchanger 17 as an evaporator will be frosted after running for a period of time, and it is necessary to run the defrost mode at intervals to melt and remove the frost layer.

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

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

[0140] S71, detect the actual condensation temperature T5 in real time through the condensation temperature detection device 19, and determine 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 turned on; at this time, the refrigerant flow direction is the same as that in the indoor cooling mode. The defrosting mode runs for more than 5 minutes and ends.

[0142] If not, then end.

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

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

[0145] S81, real-time detection of the actual outlet water temperature T82 of the electric drive heat exchange module 21, and judging whether T82>T83 is established.

[0146] If yes, the control valve 24 is controlled to make the coolant 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 circulation pump 22 are turned on; it is determined whether the battery temperature control component 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, determine whether the indoor temperature control component 10 is turned on. If so, control the control valve 24 to allow the refrigerant flowing out of the electric drive heat exchange module 21 to flow into the second channel 412, turn on the first circulation pump 22 and the second expansion valve 43, and close the first expansion valve 42; if not, determine whether the battery temperature control component 30 is in working state. If so, turn off the first circulation pump 22; if not, turn off the first expansion valve 42 and the first circulation pump 22.

[0148] S82. Repeat step S81 until the temperature control system exits the defrost mode.

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

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

[0151] S91, real-time detection of the actual outlet water temperature T92 of the battery heat exchange module 31, and determination of whether T92>T93 is established.

[0152] If yes, it is determined whether the indoor temperature control component 10 is turned on. If yes, the second expansion valve 43 and the second circulation pump 32 are turned on, and the first expansion valve 42 is closed; if no, the compressor 11, the second expansion valve 43 and the second circulation pump 32 are turned on, and the first expansion valve 42 is closed;

[0153] If not, determine whether the electric drive temperature control component 20 exchanges heat through the second channel 412. If so, close the second circulation pump 32; if not, close the first expansion valve 42, the second expansion valve 43 and the second circulation pump 32.

[0154] S92. Repeat step S91 until the temperature control system exits the defrost mode.

[0155] The system can still achieve normal operation of the electric drive temperature control component 20 and the battery temperature control component 30 in the defrost mode. The control methods of the electric drive temperature control component 20 and the battery temperature control component 30 are the same as those in the indoor cooling mode. At this time, the heat recovered by the heat recovery heat exchanger 41 is helpful to help the air-conditioning system to defrost better.

[0156] It is understandable that the temperature control system provided in the embodiment of the present application also includes a controller, which stores control instructions. When the control instructions are executed by the controller, the above-mentioned control method can be implemented, that is, the temperature control system can be controlled by the controller to operate according to the above-mentioned control method.

[0157] As can be seen from the above, the temperature control system, electric vehicle and control method of the temperature control system provided by the embodiment of the present application can realize the heat dissipation of the battery assembly in various modes such as indoor cooling and indoor heating. In the indoor heating mode, the waste heat recovery of the electric drive system and the battery assembly can be realized, the refrigerant temperature at the compressor inlet is increased, and the compression volume of the compressor is reduced, thereby improving the energy efficiency ratio of the compressor, which is conducive to reducing energy consumption and improving the heating effect of the compressor. It organically combines the indoor temperature control component, the electric drive temperature control component and the battery temperature control component together, reduces the overall volume and weight of the system, and is conducive to extending the endurance of the electric vehicle. And it integrates the outdoor heat exchanger and the electric drive radiator, shares the outdoor fan, further reduces the space occupied by the system, reduces the use of components, and is conducive to reducing the investment cost of the equipment. At the same time, it can meet the heat dissipation requirements of the electric drive system and the battery assembly under various working conditions, and the three systems (indoor temperature control component, electric drive temperature control component and battery temperature control component) are independent of each other, and can work separately without interfering with each other.

[0158] By integrating the electric drive temperature control component and the battery temperature control component into the air conditioning system of the indoor temperature control component, the space occupied by independent systems in the vehicle is reduced, thereby freeing up more space in the vehicle and improving the flexibility of the vehicle's internal layout. The integrated system reduces additional components and pipes, reduces the weight of the vehicle, and helps improve the vehicle's energy efficiency and performance. It also reduces manufacturing and maintenance costs, and the integrated system can reduce material and labor input. The optimization of the system control logic allows the heat of the electric drive system and battery components to be recovered during indoor heating and defrosting modes, improving energy utilization efficiency and further enhancing the system's energy efficiency and comfort. At the same time, the integrated system design improves compatibility with different models, making it easier to apply and promote on a variety of models.

[0159] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0160] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A temperature control system, characterized in that: Including indoor temperature control components, electric drive temperature control components, battery temperature control components and heat recovery components; The indoor temperature control assembly is used to circulate refrigerant, and includes a compressor, an indoor heat exchanger and an outdoor heat exchanger that are cyclically connected to realize a heating cycle; The heat recovery component includes a heat recovery heat exchanger, a first expansion valve and a second expansion valve, and 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, and the other end is connected to one end of the first channel, and the other end of the first channel is connected to the air intake 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 to one end of the first channel, and the other end of the first channel is connected to the air intake port of the compressor; the refrigerant in the first channel is used to exchange heat with the secondary coolant in the second channel and the third channel respectively; The electric drive temperature control component includes an electric drive heat exchange module, which is connected in series with the second channel and can be used to exchange heat with the electric drive system; The battery temperature control assembly includes a battery heat exchange module, which is connected in series with the third channel and can be used to exchange heat with the battery assembly.

2. The temperature control system according to claim 1, characterized in that: The indoor temperature control component further includes a gas-liquid separator and a four-way reversing valve, wherein the four-way reversing valve includes a first interface, a second interface, a third interface and a fourth interface; the outlet of the gas-liquid separator is connected to the air intake port of the compressor, the inlet of the gas-liquid separator is connected to the fourth interface and the first channel, and the exhaust port of the compressor is connected to the first interface; The indoor temperature control component also includes the indoor heat exchanger, the third expansion valve, the drying filter and the outdoor heat exchanger connected in series in sequence; one port of the indoor heat exchanger is connected to the third interface, and one port of the outdoor heat exchanger is connected to the second interface.

3. The temperature control system according to claim 2, characterized in that: 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 to 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 drying filter and the third expansion valve.

4. The temperature control system according to claim 1, characterized in that: The electric drive temperature control component also includes a first circulation pump, the outlet of the first circulation pump is connected to the inlet of the electric drive temperature control module, the inlet of the first circulation pump is connected to the outlet of the second channel, and the outlet of the electric drive temperature control module is connected to the inlet of the second channel.

5. The temperature control system according to claim 4, characterized in that: The electric drive temperature control component also includes an electric drive radiator and a control valve. The electric drive radiator is connected in parallel to the second channel. The control valve is used to control the coolant flowing out of the electric drive heat exchange module to flow into the second channel or into the electric drive radiator.

6. The temperature control system according to claim 1, characterized in that: The battery temperature control assembly also includes a second circulation pump, the outlet of the battery heat exchange module is connected to the inlet of the third channel, the inlet of the battery heat exchange module is connected to the outlet of the second circulation pump, and the inlet of the second circulation pump is connected to the outlet of the third channel.

7. The temperature control system according to claim 1, characterized in that: It also includes 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.

8. An electric vehicle, characterized in that: Comprising a temperature control system as described in any one of claims 1 to 7.

9. A method for controlling a temperature control system, characterized in that: Applicable to the temperature control system according to any one of claims 1 to 7, the electric drive temperature control component further comprises a first circulation pump, an electric drive radiator and a control valve, the first circulation pump and the electric drive heat exchange module are connected in series, and the electric drive radiator and the second channel are connected in parallel; The temperature control system includes an electric drive temperature control component control step and a battery temperature control component control step in the indoor heating mode. The control steps of the electric drive temperature control component include: S10, setting a preset outlet water temperature T13 of the electric drive heat exchange module; S11, real-time detection of the actual outlet water temperature T12 of the electric drive heat exchange module, and judging whether T12>T13 is established, If so, control the control valve to make the coolant flowing out of the electric drive heat exchange module flow into the electric drive radiator, turn on the outdoor fan and the first circulation pump; determine whether the battery temperature control component is in working state, if so, keep the current state unchanged; if not, close the first expansion valve; If not, it is determined whether the indoor temperature control component is turned on. If so, the control valve is controlled to allow the coolant flowing out of the electric drive heat exchange module to flow into the second channel, the first circulation pump and the first expansion valve are turned on, and the second expansion valve is closed; if not, it is determined whether the battery temperature control component is in a working state. If so, the first circulation pump is closed; if not, the first expansion valve and the first circulation pump are closed; S12, repeating step S11 until the temperature control system exits the heating mode; The battery temperature control component control steps include: S20, setting a preset water outlet temperature T23 of the battery heat exchange module; S21, real-time detection of the actual outlet water temperature T22 of the battery heat exchange module, and judging whether T22>T23 is established, If yes, then determine whether the indoor temperature control component is turned on, if yes, then turn on the first expansion valve and the second circulation pump, and turn off the second expansion valve; if no, then turn on the compressor, the first expansion valve and the second circulation pump, and turn off the second expansion valve; If not, determining whether the electric drive temperature control component exchanges heat through the second channel, and if so, turning off the second circulation pump; if not, turning off the first expansion valve, the second expansion valve and the second circulation pump; S22. Repeat step S21 until the temperature control system exits the heating mode.

10. The control method of the temperature control system according to claim 9, characterized in that: The temperature control system includes an electric drive temperature control component control step and a battery temperature control component control step in the indoor cooling mode. The electric drive temperature control component control steps include: S30, setting a preset water outlet temperature T33 of the electric drive heat exchange module; S31, real-time detection of the actual outlet water temperature T32 of the electric drive heat exchange module is performed to determine whether T32>T33 is established. If so, the control valve is controlled to allow the coolant flowing out of the electric drive heat exchange module to flow into the electric drive radiator, and the outdoor fan and the first circulation pump are turned on; if not, the first circulation pump and the outdoor fan are turned off; S32, repeating step S31 until the electric drive system is turned off; The battery temperature control component control steps include: S40, setting a preset water outlet temperature T43 of the battery heat exchange module; S41, real-time detection of the actual outlet water temperature T42 of the battery heat exchange module to determine whether T42>T43 is established. If yes, then determine whether the indoor temperature control component is turned on, if yes, then turn on the second expansion valve and the second circulation pump, and turn off the first expansion valve; if no, then turn on the compressor, the second expansion valve and the second circulation pump, and turn off the first expansion valve; If not, closing the second circulation pump and the second expansion valve; S42. Repeat step S41 until the battery assembly stops working.

Images