A temperature control system based on compressor self-generated heat

Abstract

The present application provides a temperature control system based on compressor self-generated heat, comprising a compressor, a water-cooled condenser, a gas-liquid separator, a solenoid valve, a first expansion valve, a second expansion valve, an outdoor heat exchanger, a first water pump, a three-way proportional valve, a heater core, and a battery temperature control device; the gas-liquid separator, the compressor, and the first input end of the water-cooled condenser are connected in sequence, the first output end of the water-cooled condenser is connected to the gas-liquid separator via the solenoid valve and the first expansion valve, and the flow rate when the first expansion valve is fully open is the same as when the solenoid valve is open; the second expansion valve is connected to the outdoor heat exchanger, and the second expansion valve and the outdoor heat exchanger are connected in parallel at both ends of the solenoid valve; the second output end of the water-cooled condenser is connected to the first end of the three-way proportional valve via the first water pump, and the second and third ends of the three-way proportional valve are connected to the second input end of the water-cooled condenser via the heater core and the battery temperature control device, respectively. The system provided in the present application can utilize the self-generated heat of the compressor for temperature control.

Description

Technical Field

[0001] The present disclosure generally relates to the technical field of electric vehicles, and more particularly to a temperature control system based on compressor self-generated heat. Background Art

[0002] With the development of electric vehicles, the number of electric vehicles has gradually increased. The power source of electric vehicles is the on-board battery. The on-board battery not only serves as the power source for electric vehicles to drive, but also serves as the power source for heating the passenger compartment of electric vehicles. This significantly reduces the battery's endurance. At the same time, low battery temperature will also lead to a decrease in endurance.

[0003] To address the issue of poor battery life in electric vehicles, existing technologies use a compressor to compress refrigerant to heat the battery and passenger compartment. A bypass valve is typically installed at the compressor's exhaust port to deliver high-temperature refrigerant to the compressor's air inlet. This improves compressor efficiency by increasing the density and mass flow of the refrigerant at the compressor inlet. However, the bypass valve requires control of the refrigerant flow through a regulating valve at the front end of the condenser, making it difficult to control the refrigerant temperature at the compressor inlet. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a temperature control system based on compressor self-generated heat to solve the above-mentioned problems.

[0005] The present application provides a temperature control system based on compressor self-generated heat, comprising a compressor, a water-cooled condenser, a gas-liquid separator, a solenoid valve, a first expansion valve, a second expansion valve, an outdoor heat exchanger, a first water pump, a three-way proportional valve, a heater core, and a battery temperature control device;

[0006] The output end of the gas-liquid separator, the compressor, and the first input end of the water-cooled condenser are connected in sequence, and the first output end of the water-cooled condenser is connected to the input end of the gas-liquid separator through the solenoid valve and the first expansion valve in sequence; the flow rate when the first expansion valve is fully opened is the same as that when the solenoid valve is open;

[0007] The output end of the second expansion valve is connected to the input end of the outdoor heat exchanger, and the second expansion valve and the outdoor heat exchanger are connected in parallel at both ends of the solenoid valve;

[0008] The second output end of the water-cooled condenser is connected to the first end of the three-way proportional valve through the first water pump, the second end of the three-way proportional valve is connected to the input end of the heater core, the third end of the three-way proportional valve is connected to the first input end of the battery temperature control device, the output end of the heater core is connected to the second input end of the water-cooled condenser, and the first output end of the battery temperature control device is connected to the second input end of the water-cooled condenser.

[0009] According to the technical solution provided in the embodiment of the present application, it also includes a third expansion valve, and the output end of the solenoid valve is also connected to the second input end of the battery temperature control device through the third expansion valve, and the second output end of the battery temperature control device is connected to the input end of the gas-liquid separator.

[0010] According to the technical solution provided in the embodiment of the present application, it also includes a fourth expansion valve and an evaporator, and the output end of the solenoid valve is also connected to the input end of the gas-liquid separator through the fourth expansion valve and the evaporator in sequence.

[0011] According to the technical solution provided in the embodiment of the present application, the input end and output end of the gas-liquid separator are respectively provided with a first temperature and pressure sensor and a second temperature and pressure sensor, and the first output end of the water-cooled condenser is provided with a third temperature and pressure sensor.

[0012] According to the technical solution provided in the embodiment of the present application, including a self-generated heating mode, when in the self-generated heating mode, the solenoid valve, the first expansion valve and the first water pump are turned on, the second expansion valve, the third expansion valve and the fourth expansion valve are closed, and the conductance between the first end and the second end, and the first end and the third end of the three-way proportional valve is adjusted to a set ratio.

[0013] According to the technical solution provided in the embodiment of the present application, including a passenger compartment heating mode, when in the passenger compartment heating mode, the solenoid valve, the third expansion valve and the fourth expansion valve are closed, the first expansion valve is fully open, the second expansion valve and the first water pump are turned on, and the three-way proportional valve is adjusted to the first end and the second end being connected and the first end and the third end being closed.

[0014] According to the technical solution provided in the embodiment of the present application, including a battery heating mode, when in the battery heating mode, the solenoid valve, the third expansion valve and the fourth expansion valve are closed, the first expansion valve is fully open, the second expansion valve and the first water pump are turned on, and the three-way proportional valve is adjusted to the first end and the third end being connected and the first end and the second end being closed.

[0015] According to the technical solution provided in the embodiment of the present application, including a heating and dehumidification mode, when in the heating and dehumidification mode, the solenoid valve, the third expansion valve and the evaporator are opened, and the first expansion valve, the second expansion valve, the fourth expansion valve and the first water pump are closed.

[0016] According to the technical solution provided in the embodiment of the present application, including a passenger compartment cooling mode, when in the passenger compartment cooling mode, the solenoid valve, the first expansion valve, the third expansion valve and the first water pump are closed, and the second expansion valve, the fourth expansion valve and the evaporator are opened.

[0017] According to the technical solution provided in the embodiment of the present application, including a battery cooling mode, when in the battery cooling mode, the solenoid valve, the first expansion valve, the fourth expansion valve and the first water pump are closed, and the second expansion valve, the third expansion valve and the battery temperature control device are opened.

[0018] Compared with the prior art, the present application has the following beneficial effects: by directly connecting the output end of the compressor to the input end of the water-cooled condenser, and connecting the water-cooled condenser and the gas-liquid separator through the solenoid valve and the first expansion valve, the high-temperature and high-pressure liquid refrigerant compressed by the compressor directly enters the water-cooled condenser to release heat, and then flows back to the gas-liquid separator through the solenoid valve and the first expansion valve in sequence. The refrigerant is not diverted, so there is no need to regulate the refrigerant entering the water-cooled condenser and flowing back to the gas-liquid separator. The high-temperature refrigerant can directly increase the density and mass flow of the refrigerant at the input end of the compressor, thereby improving the working efficiency of the compressor, thereby generating more heat and realizing self-heating of the compressor; the refrigerant is vaporized by the throttling effect of the first expansion valve, thereby avoiding the phenomenon of liquid accumulation in the gas-liquid separator, and the flow rate of the first expansion valve when fully open is the same as that of the solenoid valve. When the first expansion valve does not need to be throttled, the first expansion valve can be used as a solenoid valve; the heat released by the refrigerant can be used to heat the heater core and the battery temperature control device through the cooperation of the compressor and the three-way proportional valve, thereby heating the passenger compartment and the battery. The temperature control system provided in the present application has the advantages of effectively improving the working efficiency of the compressor and heating the passenger compartment and the battery through the heat generated by the compressor itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0020] Figure 1 This is a schematic diagram of the principle of cooperation between a compressor and a bypass valve in the prior art;

[0021] Figure 2 This is a schematic diagram of the structure of the temperature control system based on compressor self-generated heat provided in this application.

[0022] Figure numbers: 1. Compressor; 2. Water-cooled condenser; 3. Gas-liquid separator; 4. Solenoid valve; 5. First expansion valve; 6. Second expansion valve; 7. Outdoor heat exchanger; 8. First water pump; 9. Three-way proportional valve; 10. Warm air core; 11. Battery temperature control device; 12. Third expansion valve; 13. Fourth expansion valve; 14. Evaporator; 15. First temperature and pressure sensor; 16. Second temperature and pressure sensor; 17. Third temperature and pressure sensor; 18. On-board battery; 19. Second water pump; 20. Powertrain control device. DETAILED DESCRIPTION

[0023] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0024] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] like Figure 1 As shown, in the prior art, the compressor exhaust port is connected to a bypass branch, which is provided with a bypass valve. When the bypass valve is opened, part of the refrigerant discharged from the compressor enters the water-cooled condenser, and the other part returns directly to the gas-liquid separator through the bypass branch, and then to the compressor intake port. The bypass branch is mainly used to solve the heating problem in a low-temperature environment. When the ambient temperature is low, if there is no bypass branch, the refrigerant needs to pass through the outdoor heat exchanger or evaporator or battery temperature control device to return to the gas-liquid separator. Regardless of which path it returns, the refrigerant temperature will drop, which will in turn lead to a lower temperature of the refrigerant inhaled by the compressor, a low compressor suction density, a low refrigerant flow rate, and a high compressor exhaust temperature. Increasing the compressor speed will lead to a lower suction pressure, so the compressor speed can only be limited. If there is a bypass branch, the temperature of the compressed inlet refrigerant can be increased, thereby increasing the refrigerant density and mass flow rate, and the compressor can move to a higher speed, increasing the system heating capacity.

[0026] In the prior art, since the refrigerant discharged from the compressor is divided into two parts and the two parts affect each other, it is difficult to adjust the refrigerant flow of the two parts, and thus the accuracy of temperature control cannot be guaranteed. Therefore, there is an urgent need to provide a temperature control system to solve the above problems.

[0027] Please refer to Figure 2 , the present application provides a temperature control system based on compressor self-generated heat, including a compressor 1, a water-cooled condenser 2, a gas-liquid separator 3, a solenoid valve 4, a first expansion valve 5, a second expansion valve 6, an outdoor heat exchanger 7, a first water pump 8, a three-way proportional valve 9, a heater core 10 and a battery temperature control device 11;

[0028] The output end of the gas-liquid separator 3, the compressor 1, and the first input end of the water-cooled condenser 2 are connected in sequence, and the first output end of the water-cooled condenser 2 is connected to the input end of the gas-liquid separator 3 through the solenoid valve 4 and the first expansion valve 5 in sequence; the flow rate when the first expansion valve 5 is fully opened is the same as that when the solenoid valve 4 is open;

[0029] The output end of the second expansion valve 6 is connected to the input end of the outdoor heat exchanger 7, and the second expansion valve 6 and the outdoor heat exchanger 7 are connected in parallel at both ends of the solenoid valve 4;

[0030] The second output end of the water-cooled condenser 2 is connected to the first end of the three-way proportional valve 9 through the first water pump 8, the second end of the three-way proportional valve 9 is connected to the input end of the heater core 10, the third end of the three-way proportional valve 9 is connected to the first input end of the battery temperature control device 11, the output end of the heater core 10 is connected to the second input end of the water-cooled condenser 2, and the first output end of the battery temperature control device 11 is connected to the second input end of the water-cooled condenser 2.

[0031] Specifically, the temperature control system based on compressor self-generated heat includes a refrigerant side and a water side, wherein the components on the refrigerant side are connected as follows:

[0032] The output end of the gas-liquid separator 3 is connected to the input end of the compressor 1 through a refrigerant pipeline, the output end of the compressor 1 is connected to the refrigerant inlet (i.e., the first input end) of the water-cooled condenser 2 through a refrigerant pipeline, the refrigerant outlet (i.e., the first output end) of the water-cooled condenser 2 is connected to the input end of the solenoid valve 4 through a refrigerant pipeline, the output end of the solenoid valve 4 is connected to the input end of the first expansion valve 5 through a refrigerant pipeline, the output end of the first expansion valve 5 is connected to the input end of the gas-liquid separator 3 through a refrigerant pipeline, thereby realizing refrigerant circulation; the first The input end of the second expansion valve 6 is connected to the refrigerant pipeline between the water-cooled condenser 2 and the solenoid valve 4, and the output end of the second expansion valve 6 is connected to the input end of the outdoor heat exchanger 7. The output end of the outdoor heat exchanger 7 is connected to the refrigerant pipeline between the solenoid valve 4 and the first expansion valve 5. The first expansion valve 5 and the second expansion valve 6 are electronic expansion valves, and the first expansion valve 5 is a large-diameter expansion valve. When the first expansion valve 5 is not fully open, it can be used for refrigerant throttling. When the first expansion valve 5 is fully open, the function of the first expansion valve 5 is the same as that of the solenoid valve 4.

[0033] The device connections on the waterway side are:

[0034] The water outlet of the water-cooled condenser 2 is connected to the input end of the first water pump 8 through a water pipeline, and the output end of the first water pump 8 is connected to the first end of the three-way proportional valve 9 through a water pipeline. The second end and the third end of the three-way proportional valve 9 are respectively connected to the passenger compartment heating pipeline and the battery heating pipeline, wherein the passenger compartment heating pipeline includes the heater core 10, the second end of the three-way proportional valve 9 is connected to the input end of the heater core 10 through a water pipeline, and the output end of the heater core 10 is connected to the water inlet of the water-cooled condenser 2 through a water pipeline. The battery heating pipeline includes the battery temperature regulating device 11. The third end of the three-way proportional valve 9 is connected to the water input end of the battery temperature regulating device 11 through a water pipeline. The water output end of the battery temperature regulating device 11 is connected to the second input end of the water-cooled condenser 2 through a water pipeline. The battery temperature regulating device 11 also includes another water input end and another water output end. The other water output end is connected to the other water input end through a second water pump 19, an on-board battery 18 and a powertrain control device 20 in sequence.

[0035] Working process: On the refrigerant side, the compressor 1 absorbs refrigerant from the gas-liquid separator 3 during operation and pressurizes the refrigerant to a high-temperature and high-pressure liquid form. The high-temperature and high-pressure liquid refrigerant releases heat in the water-cooled condenser 2, and its temperature drops. Although the temperature drops, it still maintains a high-temperature and high-pressure liquid form. Then, it passes through the solenoid valve 4 and the first expansion valve 5 and returns to the gas-liquid separator 3, completing the refrigerant circulation. On the waterway side, the heat released by the high-temperature and high-pressure liquid refrigerant is transferred to the waterway side of the water-cooled condenser 2, thereby heating the circulating water. The first water pump 8 is turned on to promote the circulation of the circulating water on the waterway side. By adjusting the opening ratio of the second end and the third end of the three-way proportional valve 9, the circulating water flow in the passenger heating pipeline and the battery heating pipeline is adjusted. The circulating water in the passenger heating pipeline heats the passenger compartment through the heater core 10, and the circulating water in the battery heating pipeline indirectly heats the battery by heating the circulating water in another waterway of the battery temperature control device 11.

[0036] Working principle: On the refrigerant side, the high-pressure liquid refrigerant after being cooled by the water-cooled condenser 2 passes through the solenoid valve 4 and the first expansion valve 5 in turn and flows back to the gas-liquid separator 3. Although the temperature of the reflux refrigerant is reduced, it is still relatively high temperature, which is used to increase the temperature of the refrigerant sucked into the input end of the compressor 1, increase the density and mass flow of the refrigerant, and thus enable the compressor 1 to work at a higher speed, increase the heating capacity of the system, and adjust the temperature by the self-generation of heat by the compressor 1; since the first expansion valve 5 is a large-diameter expansion valve, through the throttling effect of the first expansion valve 5, the high-pressure liquid refrigerant becomes a low-pressure gaseous refrigerant after passing through the first expansion valve 5 and then flows back to the gas-liquid separator 3, avoiding liquid accumulation in the gas-liquid separator 3; on the waterway side, the heat generated by the self-generation of heat by the compressor 1 is combined with the proportional adjustment effect of the three-way proportional valve 9 on the circulating water, so that the temperature of the passenger compartment and the battery can be controlled respectively.

[0037] Furthermore, a third expansion valve 12 is included, and the output end of the solenoid valve 4 is also connected to the second input end of the battery temperature control device 11 through the third expansion valve 12, and the second output end of the battery temperature control device 11 is connected to the input end of the gas-liquid separator 3.

[0038] Specifically, the third expansion valve 12 is an electronic expansion valve. Its input is connected to the refrigerant pipeline between the solenoid valve 4 and the first expansion valve 5. Its output is connected to the refrigerant input of the battery thermostat 11 via the refrigerant pipeline. The refrigerant output of the battery thermostat 11 is connected to the input of the gas-liquid separator 3. Opening the third expansion valve 12 allows low-temperature refrigerant, which has undergone heat exchange in the outdoor heat exchanger 7, to be introduced into the battery thermostat 11. The low-temperature refrigerant absorbs heat in the battery thermostat 11, thereby lowering the temperature of the circulating water in the water path of the second water pump 19 and cooling the batteries.

[0039] Furthermore, it also includes a fourth expansion valve 13 and an evaporator 14 , and the output end of the solenoid valve 4 is connected to the input end of the gas-liquid separator 3 through the fourth expansion valve 13 and the evaporator 14 in sequence.

[0040] Specifically, the fourth expansion valve 13 is an electronic expansion valve. The input end of the fourth expansion valve 13 is connected to the refrigerant pipeline between the solenoid valve 4 and the first expansion valve 5. The output end of the fourth expansion valve 13 is connected to the input end of the evaporator 14 via the refrigerant pipeline. The output end of the evaporator 14 is connected to the input end of the gas-liquid separator 3 via the refrigerant pipeline. By opening the fourth expansion valve 13, the low-temperature refrigerant after heat exchange in the outdoor heat exchanger 7 is introduced into the evaporator 14. The refrigerant evaporates and absorbs heat in the evaporator 14, thereby cooling the passenger compartment.

[0041] Furthermore, the input end and the output end of the gas-liquid separator 3 are respectively provided with a first temperature and pressure sensor 15 and a second temperature and pressure sensor 16 , and the first output end of the water-cooled condenser 2 is provided with a third temperature and pressure sensor 17 .

[0042] The temperature control system based on compressor self-generated heat provided in this embodiment includes the following six modes: self-generated heat mode, passenger compartment heating mode, battery heating mode, heating and dehumidification mode, passenger compartment cooling mode, and battery cooling mode;

[0043] When in the self-generated heating mode, the solenoid valve 4, the first expansion valve 5 and the first water pump 8 are opened, the second expansion valve 6, the third expansion valve 12 and the fourth expansion valve 13 are closed, and the conductance between the first end and the second end, and the first end and the third end of the three-way proportional valve 9 is adjusted to a set ratio.

[0044] Specifically, in the self-generated heating mode, the refrigerant flow path is as follows: from the gas-liquid separator 3 to the compressor 1, then through the compressor 1 to the water-cooled condenser 2, and then through the solenoid valve 4 and the first expansion valve 5 to return to the gas-liquid separator 3. The circulating water flow path is as follows: from the water-cooled condenser 2 to the first water pump 8, after passing through the first water pump 8, a portion of it returns to the water-cooled condenser 2 through the heater core 10, and the other portion returns to the water-cooled condenser 2 through the battery temperature control device 11. In the self-generated heating mode, the first expansion valve 5 is not fully open. The opening of the first expansion valve 5 is adjusted in real time to ensure that as much gaseous refrigerant as possible returns to the gas-liquid separator 3.

[0045] When in the passenger compartment heating mode, the solenoid valve 4, the third expansion valve 12 and the fourth expansion valve 13 are closed, the first expansion valve 5 is fully open, the second expansion valve 6 and the first water pump 8 are turned on, and the three-way proportional valve 9 is adjusted so that the first end and the second end are connected and the first end and the third end are closed.

[0046] Specifically, in the passenger compartment heating mode, the refrigerant flows from the gas-liquid separator 3 to the compressor 1, then through the second expansion valve 6 to the outdoor heat exchanger 7, and then through the first expansion valve 5 to return to the gas-liquid separator 3. The circulating water flows from the water-cooled condenser 2 to the first water pump 8, then through the three-way proportional valve 9, then through the three-way proportional valve 9 to the heater core 10, and finally back to the water-cooled condenser 2. In the passenger compartment heating mode, the first expansion valve 5 is fully open, maintaining the same flow rate as the solenoid valve 4.

[0047] When in the battery heating mode, the solenoid valve 4, the third expansion valve 12 and the fourth expansion valve 13 are closed, the first expansion valve 5 is fully open, the second expansion valve 6 and the first water pump 8 are turned on, and the three-way proportional valve 9 is adjusted so that the first end and the third end are connected and the first end and the second end are closed.

[0048] Specifically, in the battery heating mode, the refrigerant flows from the gas-liquid separator 3 to the compressor 1, then through the second expansion valve 6 to the outdoor heat exchanger 7, and then through the first expansion valve 5 to return to the gas-liquid separator 3. The circulating water flows from the water-cooled condenser 2 to the first water pump 8, then through the three-way proportional valve 9, then through the three-way proportional valve 9 to the battery temperature control device 11, and finally back to the water-cooled condenser 2. In the battery heating mode, the first expansion valve 5 is fully open, maintaining the same flow rate as the solenoid valve 4.

[0049] When in the heating and dehumidification mode, the solenoid valve 4 , the third expansion valve 12 , and the evaporator 14 are opened, and the first expansion valve 5 , the second expansion valve 6 , the fourth expansion valve 13 , and the first water pump 8 are closed.

[0050] Specifically, in the heating and dehumidification mode, the refrigerant flow path is: from the gas-liquid separator 3 into the compressor 1, after passing through the compressor 1, it passes through the solenoid valve 4 and the fourth expansion valve 13 in sequence into the evaporator 14, and after passing through the evaporator 14, it flows back to the gas-liquid separator 3; in this mode, the circulating water on the waterway side does not undergo heat exchange.

[0051] When in the passenger compartment cooling mode, the solenoid valve 4 , the first expansion valve 5 , the third expansion valve 12 and the first water pump 8 are closed, and the second expansion valve 6 , the fourth expansion valve 13 and the evaporator 14 are opened.

[0052] Specifically, in the passenger compartment cooling mode, the refrigerant flow path is: from the gas-liquid separator 3 into the compressor 1, after passing through the compressor 1, enter the outdoor heat exchanger 7 through the second expansion valve 6, after passing through the outdoor heat exchanger 7, enter the evaporator 14 through the fourth expansion valve 13, and after passing through the evaporator 14, return to the gas-liquid separator 3; in this mode, the circulating water on the waterway side does not undergo heat exchange.

[0053] When in the battery cooling mode, the solenoid valve 4 , the first expansion valve 5 , the fourth expansion valve 13 and the first water pump 8 are closed, and the second expansion valve 6 , the third expansion valve 12 and the battery temperature control device 11 are opened.

[0054] Specifically, in the battery cooling mode, the refrigerant flow path is: from the gas-liquid separator 3 into the compressor 1, after passing through the compressor 1, enter the outdoor heat exchanger 7 through the second expansion valve 6, after passing through the outdoor heat exchanger 7, enter the battery temperature control device 11 through the third expansion valve 12, and after passing through the battery temperature control device 11, return to the gas-liquid separator 3; on the water side, the circulating water in the pipeline is formed by the battery temperature control device 11, the vehicle battery 18, the second water pump 19 and the powertrain control device to cool the vehicle battery 18.

[0055] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. A temperature control system based on compressor self-generated heat, characterized in that: It includes a compressor (1), a water-cooled condenser (2), a gas-liquid separator (3), a solenoid valve (4), a first expansion valve (5), a second expansion valve (6), an outdoor heat exchanger (7), a first water pump (8), a three-way proportional valve (9), a heater core (10), and a battery temperature control device (11); The output end of the gas-liquid separator (3), the compressor (1) and the first input end of the water-cooled condenser (2) are connected in sequence, and the first output end of the water-cooled condenser (2) is connected to the input end of the gas-liquid separator (3) through the solenoid valve (4) and the first expansion valve (5) in sequence; the flow rate when the first expansion valve (5) is fully opened is the same as the flow rate when the solenoid valve (4) is open; The output end of the second expansion valve (6) is connected to the input end of the outdoor heat exchanger (7), and the second expansion valve (6) and the outdoor heat exchanger (7) are connected in parallel at both ends of the solenoid valve (4); The second output end of the water-cooled condenser (2) is connected to the first end of the three-way proportional valve (9) through the first water pump (8), the second end of the three-way proportional valve (9) is connected to the input end of the heater core (10), the third end of the three-way proportional valve (9) is connected to the first input end of the battery temperature control device (11), the output end of the heater core (10) is connected to the second input end of the water-cooled condenser (2), and the first output end of the battery temperature control device (11) is connected to the second input end of the water-cooled condenser (2); The control system further includes a third expansion valve (12), the output end of the solenoid valve (4) is further connected to the second input end of the battery temperature control device (11) through the third expansion valve (12), and the second output end of the battery temperature control device (11) is connected to the input end of the gas-liquid separator (3); The control system further comprises a fourth expansion valve (13) and an evaporator (14), and the output end of the solenoid valve (4) is connected to the input end of the gas-liquid separator (3) through the fourth expansion valve (13) and the evaporator (14) in sequence; The control system includes a self-generated heating mode. When in the self-generated heating mode, the solenoid valve (4), the first expansion valve (5) and the first water pump (8) are opened, the second expansion valve (6), the third expansion valve (12) and the fourth expansion valve (13) are closed, and the conductance between the first end and the second end, and between the first end and the third end of the three-way proportional valve (9) is adjusted to a set ratio.

2. The temperature control system based on compressor self-generated heat according to claim 1, characterized in that: The input end and the output end of the gas-liquid separator (3) are respectively provided with a first temperature and pressure sensor (15) and a second temperature and pressure sensor (16), and the first output end of the water-cooled condenser (2) is provided with a third temperature and pressure sensor (17).

3. The temperature control system based on compressor self-generated heat according to claim 2, characterized in that: The invention comprises a passenger compartment heating mode. When in the passenger compartment heating mode, the solenoid valve (4), the third expansion valve (12) and the fourth expansion valve (13) are closed, the first expansion valve (5) is fully opened, the second expansion valve (6) and the first water pump (8) are turned on, and the three-way proportional valve (9) is adjusted so that the first end and the second end are connected and the first end and the third end are closed.

4. The temperature control system based on compressor self-generated heat according to claim 2, characterized in that: The invention comprises a battery heating mode. When in the battery heating mode, the solenoid valve (4), the third expansion valve (12) and the fourth expansion valve (13) are closed, the first expansion valve (5) is fully opened, the second expansion valve (6) and the first water pump (8) are turned on, and the three-way proportional valve (9) is adjusted so that the first end and the third end are connected and the first end and the second end are closed.

5. The temperature control system based on compressor self-generated heat according to claim 2, characterized in that: The invention comprises a heating and dehumidification mode. When in the heating and dehumidification mode, the solenoid valve (4), the third expansion valve (12) and the evaporator (14) are opened, and the first expansion valve (5), the second expansion valve (6), the fourth expansion valve (13) and the first water pump (8) are closed.

6. The temperature control system based on compressor self-generated heat according to claim 2, characterized in that: The invention comprises a passenger compartment cooling mode. When in the passenger compartment cooling mode, the solenoid valve (4), the first expansion valve (5), the third expansion valve (12) and the first water pump (8) are closed, and the second expansion valve (6), the fourth expansion valve (13) and the evaporator (14) are opened.

7. The temperature control system based on compressor self-generated heat according to claim 2, characterized in that: The invention comprises a battery cooling mode. When in the battery cooling mode, the solenoid valve (4), the first expansion valve (5), the fourth expansion valve (13) and the first water pump (8) are closed, and the second expansion valve (6), the third expansion valve (12) and the battery temperature regulating device (11) are opened.

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