Thermal management system of vehicle

Abstract

The utility model relates to a thermal management system of a vehicle, which is characterized in that the thermal management system comprises a refrigerant loop, a multi-way valve (6), a heat exchanger (7) and a heat exchanger (8), a first port (V1) and a fifth port (V5) of the multi-way valve (6), a compressor (1), a third joint (J3), a first heat exchanger (2), a first throttling device (3) and a third heat exchanger (9) are arranged on the first flow path (L1); wherein in the flowing direction of a refrigerant, the compressor (1), the first heat exchanger (2), the first port (V1), the fifth port (V5), the first throttling device (3) and the third heat exchanger (9) are sequentially arranged on the first flow path (L1), and the third joint (J3) is located between the third heat exchanger (9) and the compressor (1).

Description

Technical Field

[0001] The present disclosure relates to a thermal management system for a vehicle. Background Art

[0002] As people pay more and more attention to environmental protection, electric vehicles have been used more and more widely. Electric vehicles achieve endurance and driving by storing electrical energy, so that users can charge and perform other operations directly at home. In order to ensure the safety of the vehicle and a comfortable riding experience, it is necessary to perform thermal management on the power battery and passenger compartment of the vehicle when the temperature is high or low to help the power battery and passenger compartment maintain a suitable temperature. For example, the passenger compartment is kept at a suitable temperature to improve the user's driving experience. The battery should not be kept at a low temperature for a long time to cause meaningless power loss, nor should it be kept at a high temperature for a long time to avoid safety hazards.

[0003] The current thermal management system consists of a large number of components and connecting pipelines, but the thermal management modes that can be realized are relatively few, or extremely complex pipeline connection methods are required to realize more thermal management modes. This is not conducive to cost management, occupies a large space, is not flexible, and provides a low driving experience for users. Utility Model Content

[0004] In view of the above-mentioned drawbacks, the technical problem to be solved by the present invention is how to provide a thermal management system with a simpler structure and conducive to efficient operation of multiple thermal management modes.

[0005] In order to solve the technical problem, the utility model provides a thermal management system for a vehicle, the thermal management system includes a refrigerant circuit, including:

[0006] Multi-way valve;

[0007] a first flow path, wherein the first port and the fifth port of the multi-way valve, a compressor, a third junction, a first heat exchanger, a first throttling device, and a third heat exchanger are disposed on the first flow path;

[0008] Among them, along the flow direction of the refrigerant, the compressor, the first heat exchanger, the first port, the fifth port, the first throttling device and the third heat exchanger are arranged in sequence on the first flow path, and the third junction point is located between the third heat exchanger and the compressor.

[0009] Preferably, the first heat exchanger is a built-in condenser.

[0010] Preferably, the third heat exchanger is an evaporator.

[0011] The built-in condenser can be used to exchange heat with the air introduced from the outside, so that the thermal management system can preheat the evaporator in the water source heat pump mode, thereby improving the thermal efficiency.

[0012] Preferably, the thermal management system further comprises:

[0013] a second flow path on which the second port and the third port of the multi-way valve are disposed, and a second heat exchanger and a second junction are disposed;

[0014] a third flow path, on which the fourth port and the first port of the multi-way valve are provided, and on which the compressor and the first heat exchanger are provided; along the flow direction of the refrigerant, the compressor, the first heat exchanger, the first port, and the fourth port are sequentially arranged on the third flow path; and

[0015] A fourth flow path, wherein a first junction located between the three junctions and the compressor is also provided on the first flow path, one end of the fourth flow path is connected to the second junction, and the other end is connected to the first junction, wherein a second throttling device is provided in the fourth flow path.

[0016] Preferably, the thermal management system also includes a fifth flow path, wherein a seventh junction is arranged upstream of the inlet of the compressor, one end of the fifth flow path is connected to the third junction, and the other end is connected to the inlet of the compressor at the seventh junction, and along the flow direction of the refrigerant, a third throttling device, a fourth heat exchanger and the seventh junction are arranged in sequence on the fifth flow path.

[0017] Preferably, the thermal management system also includes a sixth flow path, wherein a fourth junction between the fifth port and the first throttling device and a sixth junction between the inlet of the compressor and the third junction are arranged on the first flow path, one end of the sixth flow path is connected to the fourth junction, and the other end is connected to the inlet of the compressor at the sixth junction; along the flow direction of the refrigerant, the fourth throttling device, the fifth heat exchanger and the sixth junction are sequentially arranged on the sixth flow path.

[0018] Preferably, the fifth heat exchanger is a direct cooling plate.

[0019] Preferably, the first flow path further includes an internal heat exchanger, and the internal heat exchanger realizes heat exchange between the refrigerant on the inlet side of the compressor and the refrigerant on the outlet side of the compressor.

[0020] Preferably, a stop valve is provided on the first flow path, and the stop valve is located downstream of the third junction and between the compressor.

[0021] Preferably, the shut-off valve, the first junction and the second throttle device are integrally constructed.

[0022] Preferably, the thermal management system further comprises a coolant circuit, comprising:

[0023] Pump device;

[0024] Motor components; and

[0025] The fourth heat exchanger, wherein the coolant circuit exchanges heat with the fifth flow path through the fourth heat exchanger.

[0026] Preferably, the coolant circuit also includes a low-temperature radiator, a fifth junction and a three-way valve, wherein the first valve port and the second valve port of the three-way valve are respectively connected to the first end of the motor assembly and the low-temperature radiator, and the third valve port of the three-way valve is connected to the fifth junction, wherein the fifth junction is located between the pump device and the low-temperature radiator.

[0027] Preferably, the coolant circuit further includes a high-pressure water heater, and the high-pressure water heater is disposed between the second end of the motor assembly and the fifth junction. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram showing a thermal management system according to a first embodiment of the present utility model;

[0029] Figure 2 A schematic diagram showing a thermal management system according to a second embodiment of the present utility model;

[0030] Figure 3 A schematic diagram showing a thermal management system according to a third embodiment of the present invention;

[0031] Figure 4 A schematic diagram showing a thermal management system according to a fourth embodiment of the present invention;

[0032] Figure 5 Show according to Figure 1 Schematic diagram of the air conditioning rapid heating mode of the thermal management system;

[0033] Figure 6 Show according to Figure 1 Schematic diagram of the air conditioning heating / battery heating mode of the thermal management system;

[0034] Figure 7 Show according to Figure 1 Schematic diagram of the motor waste heat utilization mode of the thermal management system;

[0035] Figure 8 Show according to Figure 1Schematic diagram of the battery heating mode of the thermal management system;

[0036] Fig. 9 Show according to Figure 1 Schematic diagram of heat pump mode of thermal management system;

[0037] Fig.10 Show according to Figure 1 Schematic diagram of the water source heat pump mode of the thermal management system;

[0038] Fig.11 Show according to Figure 1 Schematic diagram of heat pump dehumidification mode of thermal management system;

[0039] Fig.12 Show according to Figure 1 Schematic diagram of a simple dehumidification mode of a thermal management system;

[0040] Fig.13 Show according to Figure 1 A schematic diagram of the air conditioning and cooling mode of the thermal management system; and

[0041] Fig.14 Show according to Figure 1 Schematic diagram of the battery direct cooling mode of the thermal management system. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] The "one embodiment" or "embodiment" referred to herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] Reference below Figures 1 to 14Various embodiments of a thermal management system for a vehicle according to an embodiment of the present disclosure are described in detail. The thermal management system according to the present disclosure can be used in new energy vehicles, such as electric vehicles, hybrid vehicles, etc. The thermal management system includes a refrigerant circuit located at the upper part and a coolant circuit located at the lower part. The refrigerant is, for example, Freon, and the coolant is, for example, a mixed liquid of water and ethanol.

[0045] like Figures 1 to 4 As shown, the thermal management system for a vehicle according to the present disclosure includes a multi-way valve 6 having at least five ports and first, second, third, fourth, fifth, and sixth flow paths L1, L2, L3, L4, L5, and L6.

[0046] The multi-way valve 6 shown has a first port V1, a second port V2, a third port V3, a fourth port V4 and a fifth port V5. The present disclosure is not limited to the multi-way valve with five ports. In an embodiment not shown, the multi-way valve may also have more ports.

[0047] The two ends of the first flow path L1 are respectively connected to the first port V1 and the fifth port V5 of the multi-way valve 6. A compressor 1, a third junction point J3, a fourth junction point J4, a sixth junction point J6, a first heat exchanger 2, a first throttling device 3 and a third heat exchanger 9 for compressing the refrigerant into a high-temperature and high-pressure gaseous refrigerant are arranged on the first flow path L1. Along the flow direction of the refrigerant, the first heat exchanger 2, the first throttling device 3 and the third heat exchanger 9 are arranged in sequence on the first flow path L1, and the third junction point J3 is located between the third heat exchanger 9 and the compressor 1. Thus, while realizing the air source heat pump and / or the water source heat pump, the third heat exchanger 9 plays a preheating function. The fourth junction point J4 is located upstream of the first throttling device 3, and the sixth junction point J6 is located downstream of the third heat exchanger 9. The first heat exchanger 2 is configured as a built-in condenser, which can exchange heat with air. The third heat exchanger 9 is configured as an evaporator.

[0048] It should be noted here that the first heat exchanger 2 is arranged in the first flow path L1 in the flow direction of the refrigerant and is arranged downstream of the compressor 1. At the same time, the first heat exchanger 2 is also arranged adjacent to the third heat exchanger 9 as part of the warm core assembly, wherein, in the flow direction of the air, the first heat exchanger 2 is located downstream of the third heat exchanger 9. In order to more clearly show the relationship between the first heat exchanger 2 and other components with reference to the flow direction of the refrigerant and the flow direction of the air, the first heat exchanger 2 is shown in the first flow path L1 and in the warm core assembly 30 which will be described in detail below. In other words, the first heat exchanger 2 in the figure is actually the same component, not two components.

[0049] The two ends of the second flow path L2 are respectively connected to the second port V2 and the third port V3 of the multi-way valve 6. The second heat exchanger 4 and the second junction J2 are arranged on the second flow path L2. The second heat exchanger 4 is configured as an evaporative condenser, which can function as an evaporator or a condenser in different thermal management modes. When the second junction J2 is located between the second heat exchanger 4 and the third port V3 of the multi-way valve 6, the fluid reversing function of the second heat exchanger 4 when switching between the cooling mode and the heat pump mode can be realized, that is, in the cooling mode, the refrigerant flows in from one end of the second heat exchanger 4; in the heat pump mode, the refrigerant flows in from the other end of the second heat exchanger 4. Such a setting can improve the heat exchange performance of the second heat exchanger 4.

[0050] One end of the third flow path L3 is connected to the fourth port V4 of the multi-way valve 6, and the other end is connected to the inlet of the compressor 1. The compressor 1 and the first heat exchanger 2 are arranged on the third flow path L3, and a first check valve A1 is also provided to ensure the flow direction of the refrigerant from the fourth port V4 to the inlet of the first compressor 1. Along the flow direction of the refrigerant, the compressor 1, the first heat exchanger 2, the first port V1, and the fourth port V4 are arranged in sequence on the third flow path L3.

[0051] One end of the fourth flow path L4 is connected to the second junction J2, and the other end is connected to the downstream of the third junction J3. The second throttle device 5 is provided in the fourth flow path L4.

[0052] like Figure 1 , Figure 3 and Figure 4 In the embodiment shown, a first junction J1 and a stop valve 14 are further provided on the first flow path L1. The first junction J1 is located downstream of the third junction J3, the stop valve 14 is located downstream of the first junction J1, the fourth flow path L4 is connected to the first flow path L1 through the first junction J1, and the second throttling device 5 is located between the first junction J1 and the second junction J2.

[0053] like Figure 2 In the embodiment shown, a first three-way valve J1' composed of a shut-off valve and a second throttling device is provided on the first flow path L1 downstream of the third junction J3, and the fourth flow path L4 is connected to the first flow path through the first three-way valve J1'.

[0054] A seventh junction J7 is provided upstream of the inlet of the compressor 1, one end of the fifth flow path L5 is connected to the third junction J3, and the other end is connected to the inlet of the compressor 1 at the seventh junction J7. Along the flow direction of the refrigerant, a third throttling device 7, a fourth heat exchanger 8 and the seventh junction J7 are sequentially provided on the fifth flow path L5. The fourth heat exchanger 8 is configured as a battery cooler, also commonly referred to as a Chiller.

[0055] like Figure 1 and Figure 2 In the embodiment shown, a drying bottle 12 and an internal heat exchanger 13 are also provided in the first flow path L1. The drying bottle 12 is used to separate the gas and liquid of the refrigerant and discharge the liquid refrigerant. The internal heat exchanger 13 is used to achieve heat exchange between the refrigerant at the exhaust end and the refrigerant at the suction end of the compressor 1. The drying bottle 12 is located between the first heat exchanger 2 and the first throttling device 3. A seventh junction J7 is provided in the third flow path L3, and the fifth flow path L5 is connected to the inlet side of the compressor 1 upstream of the internal heat exchanger 13 using the seventh junction J7.

[0056] like Figure 3 and Figure 4 In the embodiment shown, a gas-liquid separator 23 is provided in the first flow path L1. Figure 4 In the embodiment shown, an internal heat exchanger 13' is also provided in the first flow path L1. The internal heat exchanger 13' can be constructed as a plate heat exchanger or a coaxial tube heat exchanger, and includes two heat exchange channels 13a and 13b. For the sake of simplicity of drawing, the two heat exchange channels 13a and 13b are shown separately. The gas-liquid separator 23 is used to achieve gas-liquid separation of the refrigerant and discharge the gaseous refrigerant. The gas-liquid separator 23 is located at the suction end of the compressor 1, so that the low-pressure refrigerant at the suction end of the compressor 1 first passes through the gas-liquid separator 23 and then flows into the compressor 1. The seventh junction J7 is also provided in the third flow path L3, and the fifth flow path L5 is connected to the inlet side of the compressor 1 upstream of the internal heat exchanger 13 by using the seventh junction J7. In addition, a plurality of sensors are also provided on the first flow path L1, which are used to measure the temperature and / or pressure of the refrigerant, such as PT1, PT2, and PT3 provided on the outlet and inlet sides of the internal heat exchanger 13.

[0057] One end of the sixth flow path L6 is connected to the fourth junction J4, and the other end is connected to the inlet of the compressor 1 via the sixth junction J6, wherein the sixth junction J6 is located between the outlet of the third heat exchanger 9 and the third junction J3. Along the flow direction of the refrigerant, the fourth throttling device 11, the fifth heat exchanger 10 and the sixth junction J6 are sequentially arranged on the sixth flow path L6. The fifth heat exchanger 10 is configured as a direct cooling plate, which is used for contact heat exchange with the battery to achieve cooling or heating of the battery.

[0058] The refrigerant circuit also includes a core heater assembly 30, which includes a blower mechanism 21 for accelerating air flow, a third heat exchanger 9 configured as an evaporator, a PTC heater 15, and a first heat exchanger 2 configured as a built-in condenser. As mentioned above, the first heat exchanger 2 is arranged in the first flow path L1 in the flow direction of the refrigerant and is arranged downstream of the compressor 1. At the same time, the first heat exchanger 2 is also arranged adjacent to the third heat exchanger 9 as part of the core heater assembly, wherein the first heat exchanger 2 is located downstream of the third heat exchanger 9 in the flow direction of the air.

[0059] In the air conditioning cooling mode, the air from the external environment is introduced into the warm core assembly 30 by the blower mechanism 21, and passes through the third heat exchanger 9. When the third heat exchanger 9 is working, the refrigerant evaporates and absorbs heat, thereby reducing the air temperature. In the water source heat pump mode, when the first heat exchanger 2, that is, the built-in condenser, is working, the refrigerant compressed and heated by the compressor 1 flows through the first heat exchanger 2 to preheat the third heat exchanger 9, that is, the evaporator. The preheated refrigerant flows into the fourth heat exchanger 8 (Chiller) through the third junction J3, thereby improving the thermal efficiency.

[0060] The thermal management system also includes a coolant circulation, which includes a pump device 16, a high-pressure water heater 17, a motor assembly 18, a fourth heat exchanger 8 and a low-temperature radiator 19. The coolant circuit exchanges heat with the fifth flow path L5 through the fourth heat exchanger 8, so that the heat of the coolant circuit can be transferred to the fifth flow path L5 through the fourth heat exchanger 8. A fifth junction J5 and a second three-way valve 20 are provided in the coolant circuit. The first valve port 201 and the second valve port 202 of the second three-way valve 20 are respectively connected to the first end 181 of the motor assembly 18 and the low-temperature radiator 19, and the third valve port 203 of the second three-way valve 20 is connected to the fifth junction J5, wherein the fifth junction J5 is located between the pump device 16 and the low-temperature radiator 19, so that a bypass flow path 22 for bypassing the low-temperature radiator 19 is formed between the fifth junction J5 and the second three-way valve 20. The high-pressure water heater 17 is provided between the second end 182 of the motor assembly 18 and the fifth junction J5.

[0061] In some embodiments, a second one-way valve A2 is arranged upstream of the sixth junction point J6 and downstream of the third heat exchanger 9, that is, downstream of the evaporator, and a third one-way valve A3 is arranged upstream of the sixth junction point J6 and downstream of the fifth heat exchanger 10 to ensure that the refrigerant does not flow back when the pressure at the third heat exchanger 9 or the fifth heat exchanger 10 is low.

[0062] The following is with the help of Figures 5 to 14 ,by Figure 1 The thermal management system shown is used as a basis to illustrate multiple thermal management modes.

[0063] like Figure 5As shown, the thermal management system is in the air conditioning fast heating mode. This mode is suitable for the case where the external environment is low, such as -5°C. In this mode, the first port V1 and the fifth port V5 of the multi-way valve 6 are connected, and the second port V2 and the third port V3 are not connected. The fourth throttling device 11 is closed, so that the sixth flow path L6 is not connected. The third heat exchanger 9 does not work. With the operation of the second three-way valve 20, the bypass flow path 22 bypasses the low-temperature radiator 19. The stop valve 14 is disconnected, so that the third heat exchanger 9 and the fourth heat exchanger 8 are connected in series. The refrigerant is compressed by the compressor 1 into a high-pressure and high-temperature refrigerant, which has a high temperature of about 90°, for example. The high-temperature and high-pressure refrigerant flows into the multi-way valve 6 through the first heat exchanger 2, that is, the built-in condenser, and flows through the fifth port V5 of the multi-way valve 6 through the drying bottle 12, the internal heat exchanger 13, the fourth junction J4, the first throttling device 3, and the third junction J3 to the fourth heat exchanger 8, that is, Chiller. Here, the first throttling device 3 is fully opened, so that the high-temperature and high-pressure refrigerant is not throttled and expanded, so that it flows through the evaporator 9 in a high-temperature and high-pressure state. In addition, the coolant heated by the high-pressure water heater 17 exchanges heat with the refrigerant at the Chiller, and the refrigerant obtains more heat. Subsequently, the refrigerant flows to the inlet of the compressor 1 via the fifth flow path L5. In the direction of air flow, the built-in condenser 2 is located downstream of the third heat exchanger 9, and the cold air flowing from the external environment into the warm core assembly 30 is heated by the evaporator 9 and the built-in condenser 2 in turn. The heated air is delivered to the passenger compartment of the vehicle, thereby quickly heating the passenger compartment.

[0064] like Figure 6 As shown, the thermal management system is in the air conditioning heating / battery heating mode. In this mode, the first port V1 and the fifth port V5 of the multi-way valve 6 are connected, and the second port V2, the third port V3 and the fourth port V4 are not connected. The stop valve 14 is closed. Figure 5 The modes shown are different. Figure 6 In the mode shown, the first throttling device 3 is disconnected and the fourth throttling device 11 is opened, thereby conducting the sixth flow path L6. The high-temperature and high-pressure refrigerant flows into the multi-way valve 6 through the built-in condenser, that is, the first heat exchanger 2, and flows into the fifth heat exchanger 10 from the fifth port V5 via the fourth junction J4. The fifth heat exchanger 10 serves as a direct cold plate to heat the battery. The refrigerant flowing out of the fifth heat exchanger 10 flows into the fourth heat exchanger 8 through the sixth junction J6 and the third junction J3, where it obtains heat from the coolant circuit, and then returns to the compressor 1 through the fifth flow path L5, the seventh junction J7, and the internal heat exchanger 13. The cold air flowing in from the external environment is heated by the built-in condenser 2. The heated air is delivered to the passenger compartment of the vehicle, thereby heating the passenger compartment.

[0065] like Figure 7As shown, the thermal management system is in the motor waste heat utilization mode. In this mode, the first port V1 and the fifth port V5 of the multi-way valve 6 are connected, and the second port V2, the third port V3 and the fourth port V4 are not connected. The stop valve 14 is closed. The first throttling device 3 is disconnected, and the fourth throttling device 11 is opened, so that the sixth flow path L6 is connected. With the operation of the second three-way valve 20, the bypass flow path 22 bypasses the low-temperature radiator 19. The third heat exchanger 9 does not work. In the motor waste heat utilization mode, the high-pressure water heater 17 does not work, but uses the waste heat of the motor assembly 18 to provide heat to the fourth heat exchanger 8. The high-temperature and high-pressure refrigerant flows into the multi-way valve 6 through the built-in condenser, that is, the first heat exchanger 2, and flows into the fifth heat exchanger 10 from the fifth port V5 via the fourth junction J4. The fifth heat exchanger 10 acts as a direct cooling plate to heat the battery. The refrigerant flowing out of the fifth heat exchanger 10 flows into the fourth heat exchanger 8 through the sixth junction point J6 and the third junction point J3, where it obtains heat from the coolant circuit, wherein, as mentioned above, the heat of the coolant circuit is provided by the motor waste heat, and then returns to the compressor 1 through the fifth flow path L5, the seventh junction point J7, and the internal heat exchanger 13. The cold air flowing in from the external environment is heated by the built-in condenser 2. The heated air is delivered to the passenger compartment of the vehicle, thereby heating the passenger compartment.

[0066] like Figure 8 As shown in FIG. 7 , the thermal management system is in battery heating mode. Figure 8 In the mode shown, the heating core assembly does not work and does not introduce cold air from the external environment. Therefore, the refrigerant flowing through the built-in condenser, that is, the first heat exchanger 2, remains in a high temperature and high pressure state and flows to the fifth heat exchanger 10. The fifth heat exchanger acts as a direct cooling plate to heat the battery.

[0067] like Fig. 9As shown, the thermal management system is in heat pump mode. The heat pump mode is suitable for situations where the outside temperature environment is low, such as -5°C. In this mode, the first port V1 and the fifth port V5 of the multi-way valve 6 are connected, the second port V2 and the fourth port V4 are connected, and the third port V3 is not connected. The first heat exchanger 2, that is, the built-in condenser, works, and the third heat exchanger 9, that is, the evaporator, does not work. The stop valve 14 is disconnected, so that the second heat exchanger 4 and the fourth heat exchanger 8 are connected in parallel, wherein the second heat exchanger 4 constructed as an evaporative condenser acts as an evaporator in this mode. The bypass flow path 22 bypasses the low-temperature radiator 19. The gaseous refrigerant compressed to high temperature and high pressure by the compressor 1 flows into the first heat exchanger 2, and then flows from the fifth port V5 through the multi-way valve 6 to the third junction J3 via the drying bottle 12, the internal heat exchanger 13, the fourth junction J4, and the first throttling device 3. The refrigerant is divided into two branches at the third junction J3, one of which flows into the fourth heat exchanger 8 through the third throttling device 7, and absorbs heat from the coolant circuit at the fourth heat exchanger 8 configured as a chiller, and then flows to the compressor 1 through the seventh junction J7 and the internal heat exchanger 13, thereby realizing the use of the coolant circuit to provide heat, i.e., the so-called water source heat pump. The built-in condenser, i.e., the first heat exchanger 2, preheats the evaporator, so that the refrigerant entering the chiller through the third junction J3 has a higher thermal efficiency. The first one-way valve A1 is opened, allowing the refrigerant of the other branch to flow from the third junction J3 through the first junction J1 through the second throttling device 5 and the second heat exchanger 4 in sequence, and then through the multi-way valve 6 through the seventh junction J7 to the internal heat exchanger 13, and then return to the compressor 1. The second heat exchanger 4 acts as an evaporator here to absorb heat from the external environment. After throttling expansion through the second throttle valve 5, the refrigerant flows to the second heat exchanger 4, where it absorbs heat from the external environment to realize an air source heat pump.

[0068] like Fig.10As shown, the thermal management system is in the water source heat pump mode. In this mode, the first one-way valve A1 is closed, the first port V1 and the fifth port V5 of the multi-way valve 6 are connected, and the second port V2, the third port V3 and the fourth port V4 are not connected. The gaseous refrigerant compressed to high temperature and high pressure by the compressor 1 flows into the first heat exchanger 2, and then flows to the third junction point J3 through the multi-way valve 6 via the fourth junction point J4 and the first throttling device 3, and flows into the fourth heat exchanger 8 through the third throttling device 7 at the third junction point J3, and absorbs heat from the coolant circuit at the fourth heat exchanger 8 configured as a Chiller, and then flows to the compressor 1 via the seventh junction point J7 and the internal heat exchanger 13, thereby realizing a water source heat pump with heat provided by the coolant circuit. In this mode, the evaporator 9 plays a preheating role, and the external air is heated by the evaporator 9 and the first heat exchanger 2 in turn, so that the refrigerant entering the Chiller through the third junction point J3 has a higher thermal efficiency. In the water source heat pump mode, the second three-way valve 20 can be operated as needed to bypass or connect the low-temperature radiator 19.

[0069] like Fig.11 As shown, the thermal management system is in the heat pump dehumidification mode. In this mode, the first port V1 and the fifth port V5 of the multi-way valve 6 are connected, the second port V2 and the fourth port V4 are connected, and the third port V3 is not connected. The first heat exchanger 2, that is, the built-in condenser, is working, and the third heat exchanger 9, that is, the evaporator, is working. The fifth flow path L5 is not connected. The refrigerant is compressed to high temperature and high pressure by the compressor 1 and flows to the first heat exchanger 2, and then flows to the first throttling device 3 through the multi-way valve 6, throttling and expanding at the first throttling device 3, and then evaporates and absorbs heat at the third heat exchanger 9 constructed as an evaporator. Afterwards, the refrigerant flows to the second throttling device 5 via the first junction J1, throttling and expanding at the second throttling device 5, and flows to the second heat exchanger 4. The second heat exchanger 4 plays the role of an evaporator here, absorbing heat from the external environment, thereby realizing a heat pump. In the direction of air flow, the first heat exchanger 2 is located downstream of the third heat exchanger 9. The third heat exchanger 9 acts as an evaporator to absorb heat from the outside air, cool the air, and then precipitate water in the air. The first heat exchanger 2 acts as a built-in condenser to reheat the cooled air to remove moisture.

[0070] like Fig.12As shown, the thermal management system is in a simple dehumidification mode. In this mode, the first port V1 and the second port V2 of the multi-way valve 6 are connected, the third port V3 and the fifth port V5 are connected, and the fourth port V4 is not connected. The second heat exchanger 4 acts as a condenser, the first throttling device 3 works, and the third heat exchanger 9 works. The refrigerant is compressed to high temperature and high pressure by the compressor 1, and then flows into the second heat exchanger 4 through the first port V1 of the multi-way valve 6 and flows out from the second port V2. The second heat exchanger 4 acts as a condenser in this mode, and the refrigerant condenses and releases heat here and flows into the multi-way valve 6 through the third port V3. After that, the refrigerant flows to the first throttling device 3 through the fifth port V5 of the multi-way valve 6, and after throttling and expanding at the first throttling device 3, it evaporates and absorbs heat at the third heat exchanger 9 configured as an evaporator. After that, the refrigerant returns to the compressor 1 via the first junction J1, the stop valve 14, and the internal heat exchanger 13. The air of the external environment is cooled in the third heat exchanger 9, and water in the air is precipitated. The cooled air is reheated by the first heat exchanger 2 and then blown into the vehicle cabin to remove moisture.

[0071] like Fig.13 As shown, the thermal management system is in the air conditioning cooling mode. This mode is suitable for situations where the outside environment temperature is high, for example, the outside temperature is 40°C. In this mode, the first port V1 and the second port V2 of the multi-way valve 6 are connected, the third port V3 and the fifth port V5 are connected, and the fourth port V4 is not connected. The third heat exchanger 9 works as an evaporator. The refrigerant is compressed by the compressor 1 into a high-temperature and high-pressure gaseous refrigerant, and then flows into the multi-way valve 6 through the first heat exchanger 2, and flows into the second heat exchanger 4 through the second port V2 of the multi-way valve 6. The second heat exchanger 4 plays the role of a condenser here, and the high-temperature and high-pressure gaseous refrigerant is cooled into a medium-temperature and high-pressure liquid refrigerant and flows into the multi-way valve 6 through the third port V3. Subsequently, the refrigerant passes through the fifth port V5 of the multi-way valve 6, passes through the drying bottle 12, and the internal heat exchanger 13 to the first throttling device 3. The refrigerant is throttled and expanded at the first throttling device 3 to become a gas-liquid two-phase refrigerant, and evaporates and absorbs heat at the third heat exchanger 9. The air from the external environment is introduced by the blowing mechanism 21, and the third heat exchanger 9 evaporates and absorbs heat there, thereby cooling the air. The cooled air is blown into the vehicle cabin to achieve air conditioning and cooling.

[0072] like Fig.14As shown, the thermal management system is in the battery direct cooling mode. In this mode, the first port V1 and the second port V2 of the multi-way valve 6 are connected, the third port V3 and the fifth port V5 are connected, and the fourth port V4 is not connected. The first throttling device 3 is disconnected, and the fourth throttling device 11 is opened, so that the sixth flow path L6 is connected, wherein the fourth heat exchanger 8 constructed as a direct cooling plate is working. The refrigerant is compressed by the compressor 1 into a high-temperature and high-pressure gaseous refrigerant, and then flows into the multi-way valve 6 through the first heat exchanger 2, and then flows into the second heat exchanger 4 through the second port V2 of the multi-way valve 6. The second heat exchanger 4 plays the role of a condenser here, and the high-temperature and high-pressure gaseous refrigerant is cooled into a medium-temperature and high-pressure liquid refrigerant and flows into the multi-way valve 6 through the third port V3. Subsequently, the refrigerant flows to the fourth throttling device 11 through the fifth port V5 of the multi-way valve 6 through the drying bottle 12, the internal heat exchanger 13, and the fourth junction J4. The refrigerant is throttled and expanded into a gas-liquid two-phase refrigerant at the fourth throttling device 11, and evaporates and absorbs heat at the fourth heat exchanger 8, thereby cooling the battery. The refrigerant after absorbing heat flows into the internal heat exchanger 13 through the sixth junction point J6, the third junction point J3, the first junction point J1, and the stop valve 14, where it undergoes heat exchange, and then returns to the compressor 1.

Claims

1. A thermal management system for a vehicle, characterized in that: The thermal management system includes a refrigerant circuit, including: Multi-way valve (6); a first flow path (L1), on which are provided a first port (V1) and a fifth port (V5) of the multi-way valve (6), a compressor (1), a third junction (J3), a first heat exchanger (2), a first throttling device (3) and a third heat exchanger (9); Wherein, along the flow direction of the refrigerant, the compressor (1), the first heat exchanger (2), the first port (V1), the fifth port (V5), the first throttling device (3) and the third heat exchanger (9) are arranged in sequence on the first flow path (L1), and the third junction point (J3) is located between the third heat exchanger (9) and the compressor (1).

2. The thermal management system according to claim 1, characterized in that: The first heat exchanger (2) is a built-in condenser.

3. The thermal management system according to claim 2, characterized in that: The third heat exchanger (9) is an evaporator.

4. The thermal management system according to claim 1, characterized in that: The thermal management system further comprises: a second flow path (L2), on which the second port (V2) and the third port (V3) of the multi-way valve (6) are provided, and a second heat exchanger (4) and a second junction (J2) are provided; a third flow path (L3), on which the fourth port (V4) of the multi-way valve (6) and the first port (V1) are provided, and on which the compressor (1) and the first heat exchanger (2) are provided; along the flow direction of the refrigerant, the compressor (1), the first heat exchanger (2), the first port (V1), and the fourth port (V4) are sequentially arranged on the third flow path (L3); and A fourth flow path (L4), wherein a first junction (J1) located between the third junction (J3) and the compressor (1) is also provided on the first flow path (L1), one end of the fourth flow path (L4) is connected to the second junction (J2), and the other end is connected to the first junction (J1), wherein a second throttling device (5) is provided in the fourth flow path (L4).

5. The thermal management system according to claim 1, characterized in that: The thermal management system also includes a fifth flow path (L5), wherein a seventh junction (J7) is arranged upstream of the inlet of the compressor (1), one end of the fifth flow path (L5) is connected to the third junction (J3), and the other end is connected to the inlet of the compressor (1) at the seventh junction (J7), and along the flow direction of the refrigerant, a third throttling device (7), a fourth heat exchanger (8) and a seventh junction (J7) are arranged in sequence on the fifth flow path (L5).

6. The thermal management system according to claim 1, characterized in that: The thermal management system also includes a sixth flow path (L6), wherein a fourth junction (J4) located between the fifth port (V5) and the first throttling device (3) and a sixth junction (J6) located between the inlet of the compressor (1) and the third junction (J3) are provided on the first flow path (L1), one end of the sixth flow path (L6) is connected to the fourth junction (J4), and the other end is connected to the inlet of the compressor (1) at the sixth junction (J6); along the flow direction of the refrigerant, a fourth throttling device (11), a fifth heat exchanger (10) and a sixth junction (J6) are sequentially provided on the sixth flow path (L6).

7. The thermal management system according to claim 6, characterized in that: The fifth heat exchanger (10) is a direct cooling plate.

8. The thermal management system according to claim 1, characterized in that: The first flow path (L1) further includes an internal heat exchanger (13), and the internal heat exchanger (13) realizes heat exchange between the refrigerant on the inlet side of the compressor (1) and the refrigerant on the outlet side of the compressor (1).

9. The thermal management system according to claim 4, characterized in that: A stop valve (14) is provided on the first flow path (L1), and the stop valve (14) is located downstream of the third junction (J3) and between the compressor (1).

10. The thermal management system according to claim 9, characterized in that: The shut-off valve (14), the first junction (J1) and the second throttle device (5) are integrally constructed.

11. The thermal management system according to claim 5, characterized in that: The thermal management system also includes a coolant circuit, including: Pump device (16); a motor assembly (18); and The fourth heat exchanger (8), wherein the coolant circuit exchanges heat with the fifth flow path (L5) through the fourth heat exchanger (8).

12. The thermal management system according to claim 11, characterized in that: The coolant circuit also includes a low-temperature radiator (19), a fifth junction (J5) and a three-way valve (20), wherein a first valve port (201) and a second valve port (202) of the three-way valve (20) are respectively connected to a first end (181) of the motor assembly (18) and the low-temperature radiator (19), and a third valve port (203) of the three-way valve (20) is connected to the fifth junction (J5), wherein the fifth junction (J5) is located between the pump device (16) and the low-temperature radiator (19).

13. The thermal management system according to claim 12, characterized in that: The coolant circuit further includes a high-pressure water heater (17), which is disposed between the second end (182) of the motor assembly (18) and the fifth junction (J5).

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