Integrated heat management system with hot gas bypass

Abstract

The invention relates to an integrated heat management system with a hot gas bypass, and belongs to the technical field of heat management, and the integrated heat management system with the hot gas bypass comprises a refrigerant side integration module and a water side integration module which are integrated into a whole. The refrigerant side and the water side are integrated together, the integration degree is improved, the occupied space is reduced, the production efficiency is improved, the two electromagnetic valves, the four electronic expansion valves and the two one-way valves are used, the ultra-low-temperature compressor hot gas bypass function can be achieved, and passengers are heated. According to the invention, PTC is not used, the use environment temperature of the system can be reduced to-25 DEG C to-30 DEG C, the cost of the system can be reduced, and the weight of the system can be reduced.

Description

Technical Field

[0001] The present disclosure belongs to the field of thermal management technology, and in particular relates to an integrated thermal management system with hot gas bypass. Background Art

[0002] The heat pump system is standard for mid-to-high-end electric vehicles. A heat pump system with waste heat recovery that uses R134a refrigerant can reduce the operating temperature of the heat pump air conditioner to -15°C, but it cannot meet the needs of lower temperatures and still requires the use of PTC (Positive Temperature Coefficient, which means positive temperature coefficient and refers to semiconductor materials or components with a large positive temperature coefficient).

[0003] Therefore, it is necessary to provide a new integrated thermal management system with hot gas bypass to solve the above technical problems. Summary of the invention

[0004] The purpose of the present disclosure is to provide an integrated thermal management system with hot gas bypass in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] An integrated thermal management system with hot gas bypass, comprising a refrigerant side integrated module and a water side integrated module;

[0007] The refrigerant side integrated module includes an electric compressor, a built-in condenser, an external heat exchanger, an evaporator and a gas-liquid separator which are sequentially connected to form a ring loop, and also includes a battery cooler connected in parallel with the evaporator and between the external heat exchanger and the gas-liquid separator;

[0008] The water-side integrated module includes an eight-way water valve, a low-temperature radiator, a motor water pump, a motor electronic control, a battery and a battery water pump. The two ends of the low-temperature radiator are respectively connected to the first interface and the second interface on the eight-way water valve; the third interface on the eight-way water valve is connected to the water inlet of the motor water pump, the water outlet of the motor water pump is connected to one end of the motor electronic control, and the other end of the motor electronic control is connected to the fourth interface on the eight-way water valve; the two ends of the battery are respectively connected to the fifth interface and the sixth interface on the eight-way water valve; the water inlet of the battery water pump is connected to the seventh interface on the eight-way water valve, the water outlet of the battery water pump is connected to the battery cooler, and the eighth interface on the eight-way water valve is connected to the battery cooler.

[0009] As a further optimization solution of the present disclosure, a heat pump electronic expansion valve is provided between the external heat exchanger and the built-in condenser, and a first one-way valve is provided between the external heat exchanger and the battery cooler.

[0010] As a further optimization solution of the present disclosure, a first solenoid valve is provided on a side of the built-in condenser close to the external heat exchanger, and the first solenoid valve is connected in parallel with the heat pump electronic expansion valve, the external heat exchanger, and the first one-way valve.

[0011] As a further optimization scheme of the present disclosure, an evaporator electronic expansion valve is provided on the side of the evaporator close to the external heat exchanger, and a third one-way valve is provided on the side of the evaporator close to the gas-liquid separator; a battery cooler electronic expansion valve is provided on the side of the battery cooler close to the external heat exchanger; a branch line consisting of the battery cooler and the battery cooler electronic expansion valve is connected in parallel with a branch line consisting of the evaporator, the evaporator electronic expansion valve and the third one-way valve.

[0012] As a further optimization scheme of the present disclosure, a connection point of a branch is set on the pipeline between the external heat exchanger and the first one-way valve, and another connection point of the branch is set on the pipeline between the electric compressor and the built-in condenser. A bypass electronic expansion valve, a second one-way valve and a second solenoid valve are sequentially arranged on the branch, and the bypass electronic expansion valve is located between the electric compressor and the second one-way valve.

[0013] As a further optimization solution of the present disclosure, the water-side integrated module also includes an antifreeze tank, and the water outlet of the low-temperature radiator is connected to the antifreeze tank.

[0014] As a further optimization solution of the present disclosure, the pipeline between the motor water pump and the third interface on the eight-way water valve is connected to the first water outlet of the antifreeze tank.

[0015] As a further optimization solution of the present disclosure, the battery water pump and the pipeline between the seventh interface on the eight-way water valve are connected to the second water outlet of the antifreeze tank.

[0016] The beneficial effects of the present disclosure are:

[0017] The present invention integrates the refrigerant side and the water side together, improves the integration level, reduces the occupied space, and improves the production efficiency. By using two solenoid valves, four electronic expansion valves and two one-way valves, the hot gas bypass function of the compressor at an extremely low temperature can be realized to heat the passengers. Without using PTC, the heating temperature of the system can be reduced to -25°C to -30°C, reducing the cost and weight of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present disclosure;

[0019] Figure 2 is a schematic diagram of the system status of mode 1 in the embodiment of the present disclosure;

[0020] Figure 3 is a schematic diagram of the system status of mode 2 in the embodiment of the present disclosure;

[0021] Figure 4 is a schematic diagram of the system status of mode 3 in the embodiment of the present disclosure;

[0022] Figure 5 is a schematic diagram of a system state of mode 4 in an embodiment of the present disclosure;

[0023] Figure 6 is a schematic diagram of a system state of mode 5 in an embodiment of the present disclosure;

[0024] Figure 7 is a schematic diagram of a system state of mode 6 in an embodiment of the present disclosure;

[0025] Figure 8 is a schematic diagram of the system status of mode 7 in an embodiment of the present disclosure;

[0026] Fig. 9 is a schematic diagram of a system state of mode eight in an embodiment of the present disclosure;

[0027] Fig.10 is a schematic diagram of a system state of mode nine in an embodiment of the present disclosure;

[0028] Fig.11 is a schematic diagram of a system state of mode 10 in an embodiment of the present disclosure;

[0029] Fig.12 is a schematic diagram of a system state of mode 11 in an embodiment of the present disclosure;

[0030] Fig.13 is a schematic diagram of a system state of mode 12 in an embodiment of the present disclosure;

[0031] Fig.14 3 is a schematic diagram of the system status of mode thirteen in the embodiment of the present disclosure.

[0032] In the figure: 1. electric compressor; 2. built-in condenser; 3. evaporator; 4. external heat exchanger; 5. low-temperature radiator; 6. eight-way water valve; 7. motor water pump; 8. battery cooler; 9. gas-liquid separator; 10. bypass electronic expansion valve; 11. first solenoid valve; 12. heat pump electronic expansion valve; 13. first non-return valve; 14. battery cooler electronic expansion valve; 15. second solenoid valve; 16. second non-return valve; 17. third non-return valve; 18. evaporator electronic expansion valve; 19. battery water pump; 20. motor electronic control; 21. battery. DETAILED DESCRIPTION

[0033] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0034] like Figure 1 As shown, an integrated thermal management system with hot gas bypass includes a refrigerant side integrated module and a water side integrated module;

[0035] The refrigerant side integrated module includes an electric compressor 1, a built-in condenser 2, an external heat exchanger 4, an evaporator 3 and a gas-liquid separator 9 which are sequentially connected to form a ring loop, and also includes a battery cooler 8 connected in parallel with the evaporator 3 and between the external heat exchanger 4 and the gas-liquid separator 9;

[0036] The water-side integrated module includes an eight-way water valve 6, a low-temperature radiator 5, a motor water pump 7, a motor electronic control 20, a battery 21 and a battery water pump 19, wherein the two ends of the low-temperature radiator 5 are respectively connected to the first interface and the second interface on the eight-way water valve 6; the third interface on the eight-way water valve 6 is connected to the water inlet of the motor water pump 7, the water outlet of the motor water pump 7 is connected to one end of the motor electronic control 20, and the other end of the motor electronic control 20 is connected to the fourth interface on the eight-way water valve 6; the two ends of the battery 21 are respectively connected to the fifth interface and the sixth interface on the eight-way water valve 6; the water inlet of the battery water pump 19 is connected to the seventh interface on the eight-way water valve 6, the water outlet of the battery water pump 19 is connected to the battery cooler 8, and the eighth interface on the eight-way water valve 6 is connected to the battery cooler 8.

[0037] A heat pump electronic expansion valve 12 is provided between the external heat exchanger 4 and the built-in condenser 2 , and a first non-return valve 13 is provided between the external heat exchanger 4 and the battery cooler 8 .

[0038] A first solenoid valve 11 is disposed on a side of the built-in condenser 2 close to the external heat exchanger 4 . The first solenoid valve 11 is connected in parallel with the heat pump electronic expansion valve 12 , the external heat exchanger 4 , and the first one-way valve 13 .

[0039] An evaporator electronic expansion valve 18 is provided on the side of the evaporator 3 close to the external heat exchanger 4, and a third one-way valve 17 is provided on the side of the evaporator 3 close to the gas-liquid separator 9; a battery cooler electronic expansion valve 14 is provided on the side of the battery cooler 8 close to the external heat exchanger 4; a branch line composed of the battery cooler 8 and the battery cooler electronic expansion valve 14 is connected in parallel with a branch line composed of the evaporator 3, the evaporator electronic expansion valve 18 and the third one-way valve 17.

[0040] A connection point of a branch is set on the pipeline between the external heat exchanger 4 and the first one-way valve 13, and another connection point of the branch is set on the pipeline between the electric compressor 1 and the built-in condenser 2. A bypass electronic expansion valve 10, a second one-way valve 16 and a second solenoid valve 15 are sequentially arranged on the branch, and the bypass electronic expansion valve 10 is located between the electric compressor 1 and the second one-way valve 16.

[0041] The water-side integrated module also includes an antifreeze tank, and the water outlet of the low-temperature radiator 5 is connected to the antifreeze tank. The pipeline between the motor water pump 7 and the third interface on the eight-way water valve 6 is connected to the first water outlet of the antifreeze tank. The pipeline between the battery water pump 19 and the seventh interface on the eight-way water valve 6 is connected to the second water outlet of the antifreeze tank.

[0042] Mode 1: High temperature passenger compartment cooling and battery cooling, such as Figure 2 As shown, the mode description:

[0043] The refrigerant is discharged from the electric compressor 1, and the heat pump electronic expansion valve 12 is fully opened, condensing in the external heat exchanger 4 to release heat. It passes through the evaporator electronic expansion valve 18 and the evaporator 3, evaporates and absorbs heat in the evaporator 3 to cool the passenger air; it passes through the battery cooler electronic expansion valve 14 and the battery cooler 8 to cool the battery coolant.

[0044] Water side: The antifreeze is discharged through the motor water pump 7 and passes through the motor electronic control 20 to cool the motor electronic control 20. The antifreeze enters the low-temperature radiator 5 through the eight-way water valve 6 to release heat into the atmosphere. The antifreeze is discharged through the motor water pump 7 and passes through the battery cooler 8. The cold source of the air conditioner is used to reduce the temperature of the antifreeze. The eight-way water valve 6 allows the low-temperature antifreeze to enter the battery 21 to cool the battery 21.

[0045] Mode 2: Medium temperature passenger compartment dehumidification Ⅰ, such as Figure 3 As shown, the mode description:

[0046] The refrigerant is discharged from the electric compressor 1 and releases heat through the built-in condenser 2. The heat pump electronic expansion valve 12 is fully opened. After passing through the evaporator electronic expansion valve 18, the voltage refrigerant evaporates and absorbs heat in the evaporator 3, achieving cooling and dehumidification of the air in the passenger compartment. The evaporator 3 and the built-in condenser 2 are used in combination to achieve cooling and dehumidification of the air side, heat the air, and reduce the possibility of fogging of the vehicle windshield.

[0047] Mode 3: Medium temperature passenger compartment dehumidification II, such as Figure 4 As shown, the mode description:

[0048] The refrigerant is discharged from the electric compressor 1 and releases heat through the built-in condenser 2. The heat pump electronic expansion valve 12 is fully opened. After passing through the evaporator electronic expansion valve 18, the voltage refrigerant evaporates and absorbs heat in the evaporator 3, achieving cooling and dehumidification of the air in the passenger compartment. At the same time, the refrigerant passes through the battery cooler 8 and can absorb heat on the water side.

[0049] The evaporator 3 and the built-in condenser 2 are used in combination to achieve cooling and dehumidification on the air side and heat the air. Compared with mode 2, the air outlet temperature is higher.

[0050] Mode 4: Medium temperature passenger compartment dehumidification III, such as Figure 5 As shown, the mode description:

[0051] The refrigerant is discharged from the electric compressor 1 and passes through the built-in condenser 2 to complete the heating of the air. The heated air is blown to the windshield, increasing the temperature of the glass surface and reducing the probability of fogging of the windshield. After passing through the first solenoid valve 11 and the evaporator electronic expansion valve 18, the refrigerant evaporates and absorbs heat in the evaporator 3, condensing the moisture in the air into liquid water, reducing the humidity of the air. After passing through the heat pump electronic expansion valve 12, the other refrigerant enters the external heat exchanger 4, where the refrigerant evaporates and absorbs the heat of the air. After the two routes merge, they pass through the gas-liquid separator 9 and finally return to the electric compressor 1.

[0052] Mode 5: Low temperature water source heat pump (heat pump motor waste heat recovery and environmental heat absorption), such as Figure 6 As shown, the mode description:

[0053] The refrigerant is discharged from the electric compressor 1, passes through the built-in condenser 2, and releases heat to the passenger compartment. After passing through the first solenoid valve 11 and the battery cooler electronic expansion valve 14, the refrigerant absorbs heat in the evaporator of the battery cooler 8, absorbs the heat transferred from the air by the low-temperature radiator 5 and the waste heat in the motor electronic control 20. Finally, the refrigerant returns to the electric compressor 1 through the gas-liquid separator 9.

[0054] Mode 6: Low temperature water source heat pump (motor waste heat recovery), such as Figure 7 As shown, the mode description:

[0055] The refrigerant is discharged from the electric compressor 1 and passes through the built-in condenser 2 to complete the heating of the air. The heated air is blown into the passenger compartment to heat the passenger compartment. After passing through the first solenoid valve 11 and the battery cooler electronic expansion valve 14, the refrigerant evaporates and absorbs heat in the battery cooler 8, absorbing the heat of the motor. Finally, the refrigerant passes through the gas-liquid separator 9 and returns to the electric compressor 1. In the water circuit, the antifreeze is discharged from the motor water pump 7 and enters the motor electronic control 20. The heat of the motor electronic control 20 is released into the antifreeze. After passing through the eight-way water valve 6, it passes through the battery water pump 19 and enters the battery cooler 8. In the battery cooler 8, the heat is released to the low-pressure gaseous refrigerant.

[0056] Mode 7: Low temperature water source heat pump (battery & motor waste heat recovery), such as Figure 8 As shown, the mode description:

[0057] The refrigerant is discharged from the electric compressor 1 and passes through the built-in condenser 2 to complete the heating of the air. The heated air is blown into the passenger compartment to heat the passenger compartment. After passing through the first solenoid valve 11 and the battery cooler electronic expansion valve 14, the refrigerant evaporates and absorbs heat in the battery cooler 8, absorbing the heat of the motor. Finally, the refrigerant passes through the gas-liquid separator 9 and returns to the electric compressor 1. In the water circuit, the antifreeze is discharged from the motor water pump 7 and enters the motor electronic control 20. The heat of the motor electronic control 20 is released into the antifreeze, and then enters the battery 21 after passing through the eight-way water valve 6. The heat of the battery 21 is transferred to the antifreeze, and then continues to pass through the battery water pump 19 and enters the battery cooler 8. In the battery cooler 8, the heat is released to the low-pressure gaseous refrigerant.

[0058] Mode 8: Low temperature water source heat pump (heat pump environment absorbs heat) + battery heating (motor stall || reduced efficiency heating battery), such as Fig. 9 As shown, the mode description:

[0059] The refrigerant is discharged from the electric compressor 1 and passes through the built-in condenser 2 to complete the heating of the air. The heated air is blown to the passenger compartment to heat the passenger compartment. After passing through the first solenoid valve 11 and the battery cooler electronic expansion valve 14, the refrigerant evaporates and absorbs heat in the battery cooler 8, absorbing the heat of the antifreeze. Finally, the refrigerant passes through the gas-liquid separator 9 and returns to the electric compressor 1.

[0060] In the first water branch, the low-temperature radiator 5 absorbs heat from the air and then passes through the battery water pump 19 to enter the battery cooler 8, where the heat is released to the low-pressure gaseous refrigerant.

[0061] The second water branch allows the motor electronic control 20 to be in a low-efficiency working range, and the electrical energy is converted into thermal energy, thereby heating the antifreeze. The higher antifreeze flows into the battery 21, thereby heating the battery 21, and continues to flow into the fifth interface of the eight-way water valve 6, flows out from the third interface, and flows into the motor water pump 7.

[0062] Mode 9: Low temperature air source heat pump + motor waste heat || stall heating battery, such as Fig.10 As shown, the mode description:

[0063] The refrigerant is discharged from the electric compressor 1, passes through the built-in condenser 2, completes the heating of the air, and blows the heated air into the passenger compartment to heat the passenger compartment. After the heat pump electronic expansion valve 12 throttles and reduces the pressure, the refrigerant evaporates and absorbs heat in the external heat exchanger 4, absorbing heat from the air. Finally, the refrigerant passes through the gas-liquid separator 9 and returns to the electric compressor 1.

[0064] The water circuit allows the motor electronic control 20 to be in a low-efficiency working range, and the electrical energy is converted into thermal energy, thereby heating the antifreeze. The higher antifreeze flows into the battery 21, thereby heating the battery 21, and continues to flow into the fifth interface of the eight-way water valve 6, flows out from the third interface, and flows into the motor water pump 7.

[0065] Mode 10: Low temperature air source heat pump + motor heat storage, such as Fig.11 As shown, the mode description:

[0066] The refrigerant is discharged from the electric compressor 1, passes through the built-in condenser 2, completes the heating of the air, and blows the heated air into the passenger compartment to heat the passenger compartment. After the heat pump electronic expansion valve 12 throttles and reduces the pressure, the refrigerant evaporates and absorbs heat in the external heat exchanger 4, absorbing heat from the air. Finally, the refrigerant passes through the gas-liquid separator 9 and returns to the electric compressor 1.

[0067] In the water circuit, the antifreeze is discharged from the motor water pump 7 and passes through the motor electronic control 20, which puts it in a low-efficiency working range, converting electrical energy into thermal energy, but not actively releasing heat to the refrigerant, and storing the heat. The antifreeze continues to flow into the fourth interface of the eight-way water valve 6, flows out from the seventh interface, flows into the battery water pump 19, and flows into the battery cooler 8, and does not actively release heat to the refrigerant in the battery cooler 8. The antifreeze continues to flow into the eighth interface of the eight-way water valve 6, and then flows out from the third interface and enters the inlet of the motor water pump 7.

[0068] Mode 11: Low temperature dual source heat pump, such as Fig.12 As shown, the mode description:

[0069] The refrigerant is discharged from the electric compressor 1, passes through the built-in condenser 2, heats the air, and the heated air is blown into the passenger compartment to heat the passenger compartment. After passing through the first solenoid valve 11 and the battery cooler electronic expansion valve 14, the refrigerant evaporates and absorbs heat in the battery cooler 8, absorbing the heat generated by the motor from the antifreeze. Another refrigerant passes through the heat pump electronic expansion valve 12, throttles and reduces pressure, and evaporates and absorbs air heat when passing through the external heat exchanger 4. The two refrigerant routes merge and pass through the gas-liquid separator 9 and return to the electric compressor 1. In the water circuit, the antifreeze is discharged from the motor water pump 7 and enters the motor electronic control 20. The heat of the motor electronic control 20 is transferred to the antifreeze. After passing through the eight-way water valve 6, it passes through the battery water pump 19 and enters the battery cooler 8. In the battery cooler 8, the heat is released to the low-pressure gaseous refrigerant.

[0070] Mode 12: Extremely low temperature hot gas bypass + motor efficiency reduction || stalled rotor heating battery, such as Fig.13 As shown, the mode description:

[0071] The refrigerant is discharged from the electric compressor 1 and releases heat to the passenger compartment through the built-in condenser 2. The pressure difference between the exhaust and intake of the electric compressor is achieved through the first solenoid valve 11 and the battery cooler electronic expansion valve 14.

[0072] The other refrigerant flows through the bypass electronic expansion valve 10 to achieve sufficient refrigerant flow. The two refrigerants merge into the gas-liquid separator 9 and finally return to the air intake of the electric compressor 1. This mode does not depend on the ambient temperature and can heat the passenger compartment at -25°C.

[0073] On the water side, the motor and electronic control 20 operates in the efficiency range to heat the flowing antifreeze liquid, thereby heating the battery 21.

[0074] Mode 13: Filling mode and battery LTR cooling, such as Fig.14 As shown, the mode description:

[0075] After the vehicle is off the assembly line, all the parts on the water side are filled with air. The system needs to be evacuated first, and then antifreeze is added. Because it is not completely vacuumed, each component still contains some air. After adding antifreeze, the motor water pump 7, motor electronic control 20, eight-way water valve 6, battery 21, battery water pump 19, battery cooler 8, and low-temperature radiator 5 are connected in series to circulate the system and exhaust the air in the system. In addition, this mode is also used to replenish antifreeze.

[0076] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present disclosure. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure.

Claims

1. An integrated thermal management system with hot gas bypass, characterized in that: It includes a refrigerant side integrated module and a water side integrated module; The refrigerant-side integrated module comprises an electric compressor (1), a built-in condenser (2), an external heat exchanger (4), an evaporator (3) and a gas-liquid separator (9) which are sequentially connected to form a ring loop, and also comprises a battery cooler (8) which is connected in parallel with the evaporator (3) and between the external heat exchanger (4) and the gas-liquid separator (9); The water-side integrated module comprises an eight-way water valve (6), a low-temperature radiator (5), a motor water pump (7), a motor electronic control (20), a battery (21) and a battery water pump (19); two ends of the low-temperature radiator (5) are respectively connected to a first interface and a second interface on the eight-way water valve (6); a third interface on the eight-way water valve (6) is connected to a water inlet of the motor water pump (7); a water outlet of the motor water pump (7) is connected to one end of the motor electronic control (20); The other end of the motor electronic control (20) is connected to the fourth interface on the eight-way water valve (6); the two ends of the battery (21) are respectively connected to the fifth interface and the sixth interface on the eight-way water valve (6); the water inlet of the battery water pump (19) is connected to the seventh interface on the eight-way water valve (6), the water outlet of the battery water pump (19) is connected to the battery cooler (8), and the eighth interface on the eight-way water valve (6) is connected to the battery cooler (8).

2. An integrated thermal management system with hot gas bypass according to claim 1, characterized in that: A heat pump electronic expansion valve (12) is provided between the external heat exchanger (4) and the built-in condenser (2), and a first one-way valve (13) is provided between the external heat exchanger (4) and the battery cooler (8).

3. An integrated thermal management system with hot gas bypass according to claim 2, characterized in that: A first solenoid valve (11) is provided on a side of the built-in condenser (2) close to the external heat exchanger (4); the first solenoid valve (11) is connected in parallel with the heat pump electronic expansion valve (12), the external heat exchanger (4), and the first one-way valve (13).

4. The integrated thermal management system with hot gas bypass according to claim 3, characterized in that: An evaporator electronic expansion valve (18) is provided on a side of the evaporator (3) close to the external heat exchanger (4), and a third one-way valve (17) is provided on a side of the evaporator (3) close to the gas-liquid separator (9); a battery cooler electronic expansion valve (14) is provided on a side of the battery cooler (8) close to the external heat exchanger (4); a branch line formed by the battery cooler (8) and the battery cooler electronic expansion valve (14) is connected in parallel with a branch line formed by the evaporator (3), the evaporator electronic expansion valve (18) and the third one-way valve (17).

5. The integrated thermal management system with hot gas bypass according to claim 4, characterized in that: A connection point of a branch is set on the pipeline between the external heat exchanger (4) and the first non-return valve (13), and another connection point of the branch is set on the pipeline between the electric compressor (1) and the built-in condenser (2). A bypass electronic expansion valve (10), a second non-return valve (16) and a second solenoid valve (15) are sequentially arranged on the branch. The bypass electronic expansion valve (10) is located between the electric compressor (1) and the second non-return valve (16).

6. An integrated thermal management system with hot gas bypass according to claim 5, characterized in that: The water-side integrated module also includes an antifreeze tank, and the water outlet of the low-temperature radiator (5) is connected to the antifreeze tank.

7. An integrated thermal management system with hot gas bypass according to claim 6, characterized in that: The pipeline between the motor water pump (7) and the third interface on the eight-way water valve (6) is connected to the first water outlet of the antifreeze liquid tank.

8. An integrated thermal management system with hot gas bypass according to claim 7, characterized in that: The pipeline between the battery water pump (19) and the seventh interface on the eight-way water valve (6) is connected to the second water outlet of the antifreeze liquid tank.

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