Heat management system for waste heat utilization

Abstract

The present application relates to the field of new energy vehicle thermal management technology, provide a kind of heat management system of waste heat utilization, including waste heat source, first heat exchanger, condenser and evaporator, first heat exchanger is connected with waste heat source, for absorbing the heat transferred by waste heat source;Condenser and first heat exchanger are connected with first injection line and second injection line in parallel, first injection line is provided with first injector, and second injection line is provided with second injector;Evaporator and condenser are connected with heat absorption line, for absorbing the heat of evaporator, and heat recovery line is arranged between evaporator and condenser, for returning the heat of evaporator to condenser;The heat management system provided by the present application utilizes double-injector coupling to carry out the heat conversion of waste heat, converts thermal energy into kinetic energy, improves refrigeration effect, and realizes the step-by-step utilization of energy.

Description

Technical Field

[0001] This invention relates to the field of thermal management technology for new energy vehicles, and in particular to a thermal management system for waste heat utilization. Background Technology

[0002] Currently, electric vehicles are entering a phase of rapid development, and users have increasingly higher requirements for the lifespan of electric vehicles, the comfort of passenger cabin cooling and heating, and the overall driving range. Compared to traditional gasoline vehicles, vehicles powered by fuel cells and other similar energy sources are more sensitive to temperature and have higher energy consumption in their thermal management systems.

[0003] Existing thermal management systems can effectively regulate the temperature of each subsystem, but they lack unified planning for the energy of the entire vehicle, resulting in low efficiency and waste of usable waste heat, which greatly restricts the vehicle's range. Summary of the Invention

[0004] This invention provides a waste heat utilization thermal management system to solve the problems of high energy consumption and greenhouse effect of working fluid in the thermal management of new energy transportation vehicles in the prior art. It realizes the conversion of thermal energy into kinetic energy by utilizing waste heat and a dual-injector coupling system, thereby improving the cooling effect and realizing the cascade utilization of energy.

[0005] This invention provides a waste heat utilization thermal management system, comprising:

[0006] Waste heat source;

[0007] The first heat exchanger is connected to the waste heat source and is used to absorb the heat transferred by the waste heat source.

[0008] A condenser, wherein a first injection pipe and a second injection pipe are connected in parallel between the condenser and the first heat exchanger, wherein a first injector is provided in the first injection pipe and a second injector is provided in the second injection pipe;

[0009] An evaporator is provided, and a heat absorption pipe is connected between the evaporator and the condenser to absorb heat from the evaporator. A heat return pipe is also provided between the evaporator and the condenser to return the heat from the evaporator to the condenser.

[0010] The waste heat utilization thermal management system provided by the present invention further includes a waste heat recovery circulation loop, in which a circulation medium flows, and the waste heat recovery circulation loop includes an external radiator and a booster pump. The waste heat source, the first heat exchanger, the external radiator and the booster pump are sequentially connected to form a closed loop.

[0011] According to the waste heat utilization thermal management system provided by the present invention, the intermediate outlet of the condenser is connected to the injection inlet of the second ejector via a pipeline.

[0012] The waste heat utilization thermal management system provided by the present invention includes a second heat exchanger, a first outlet of the second heat exchanger connected to the inlet of the condenser, a first inlet of the second heat exchanger connected to the first injection pipeline, a second inlet of the second heat exchanger connected to the second injection pipeline, and a second outlet of the second heat exchanger connected to the inlet of the first heat exchanger via a pipeline.

[0013] According to the waste heat utilization thermal management system provided by the present invention, a third heat exchanger is provided in the heat absorption pipeline. The first inlet of the third heat exchanger is connected to the outlet of the condenser through a pipeline. The first outlet of the third heat exchanger is connected to the inlet of the evaporator through a pipeline. The outlet of the evaporator is connected to the second inlet of the third heat exchanger through a pipeline. The second outlet of the third heat exchanger is connected to the regenerative pipeline.

[0014] According to the waste heat utilization thermal management system provided by the present invention, an expansion valve is provided in the pipeline between the first outlet of the third heat exchanger and the inlet of the evaporator.

[0015] According to the waste heat utilization thermal management system provided by the present invention, the regenerative pipeline includes a first branch, which is connected between the second outlet of the third heat exchanger and the injection inlet of the first ejector, and a one-way valve is provided in the first branch.

[0016] According to the waste heat utilization thermal management system provided by the present invention, the regenerative pipeline further includes a second branch, which is connected between the second outlet of the third heat exchanger and the first inlet of the second heat exchanger, and a compressor is provided in the second branch.

[0017] According to the waste heat utilization thermal management system provided by the present invention, the regenerative pipeline further includes a third branch, which is connected between the outlet of the first ejector and the first inlet of the second heat exchanger, and a compressor is provided on the third branch.

[0018] According to the waste heat utilization thermal management system provided by the present invention, an in-vehicle heat exchanger is connected in parallel between the first heat exchanger and the external radiator, a first valve is provided in the pipeline where the in-vehicle heat exchanger is located, and a second valve is provided in the pipeline between the first heat exchanger and the external radiator.

[0019] The present invention provides a waste heat utilization thermal management system that uses recovered waste heat as part or all of the power to drive a hybrid jet refrigeration cycle, and can use the recovered waste heat to directly heat the vehicle, which greatly reduces the energy consumption of the thermal management system and achieves precise utilization of energy of different grades. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the thermal management system provided in an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the working mode of the compressor parallel auxiliary of the thermal management system provided in an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of the working mode of the compressor series auxiliary in the thermal management system provided in an embodiment of the present invention;

[0024] Figure 4 A schematic diagram of the pure ejector working mode of the thermal management system provided in an embodiment of the present invention;

[0025] Figure 5 A schematic diagram of the pure compressor operating mode of the thermal management system provided in an embodiment of the present invention;

[0026] Figure 6 One of the structural schematic diagrams of the waste heat recovery loop in the pure compressor working mode of the thermal management system provided in an embodiment of the present invention;

[0027] Figure 7 This is the second schematic diagram of the waste heat recovery loop in the pure compressor operating mode of the thermal management system provided in this embodiment of the invention.

[0028] Figure label:

[0029] 1. Waste heat source; 2. First heat exchanger; 3. Condenser; 4. First ejector; 5. Second ejector; 6. Expansion valve; 7. Evaporator; 8. Second heat exchanger; 9. Third heat exchanger; 10. Compressor; 11. Check valve; 12. External radiator; 13. Water pump; 14. Internal heat exchanger; 15. First valve; 16. Second valve; 17. First solenoid valve; 18. Second solenoid valve; 19. Third solenoid valve; 20. Fourth solenoid valve; 21. Fifth solenoid valve; 22. First branch; 23. Second branch; 24. Third branch. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0031] The following is combined Figures 1 to 7 A waste heat utilization thermal management system provided in an embodiment of the present invention is described.

[0032] This embodiment provides a waste heat utilization thermal management system, including: waste heat source 1, first heat exchanger 2, condenser 3 and evaporator 7. The waste heat source 1 can be different types of equipment or devices, such as fuel cells.

[0033] The first heat exchanger 2 is connected to the waste heat source 1 to absorb the heat transferred by the waste heat source 1; the condenser 3 is connected in parallel with the first heat exchanger 2 by a first injection pipe and a second injection pipe, the first injection pipe is equipped with a first ejector 4 and the second injection pipe is equipped with a second ejector 5; the evaporator 7 is connected to the condenser 3 by a heat absorption pipe to absorb the heat of the evaporator 7, and the evaporator 7 is equipped with a heat return pipe to the condenser 3 to return the heat of the evaporator 7 to the condenser 3.

[0034] In this embodiment, the intermediate outlet of the condenser 3 is connected to the injection inlet of the second ejector 5 via a pipeline.

[0035] Reference Figures 1 to 5 In this embodiment, a second heat exchanger 8 is also included. The first outlet of the second heat exchanger 8 is connected to the inlet of the condenser 3, the first inlet of the second heat exchanger 8 is connected to the first injection pipe, the second inlet of the second heat exchanger 8 is connected to the second injection pipe, and the second outlet of the second heat exchanger 8 is connected to the inlet of the first heat exchanger 2 through a pipe.

[0036] Furthermore, a third heat exchanger 9 is installed in the heat absorption pipeline. The first inlet of the third heat exchanger 9 is connected to the outlet of the condenser 3 via a pipeline, the first outlet of the third heat exchanger 9 is connected to the inlet of the evaporator 7 via a pipeline, the outlet of the evaporator 7 is connected to the second inlet of the third heat exchanger 9 via a pipeline, and the second outlet of the third heat exchanger 9 is connected to the regenerative pipeline. An expansion valve 6 is installed in the pipeline between the first outlet of the third heat exchanger 9 and the inlet of the evaporator 7.

[0037] In some embodiments, a parallel auxiliary operation mode of compressor 10 is adopted. The regenerative pipeline includes a first branch 22 and a second branch 23. The first branch 22 is connected between the second outlet of the third heat exchanger 9 and the injection inlet of the first ejector 4, and a one-way valve 11 is provided in the first branch 22. The second branch 23 is connected between the second outlet of the third heat exchanger 9 and the first inlet of the second heat exchanger 8, and a compressor 10 is provided in the second branch 23.

[0038] like Figure 2 As shown, compressor 10 and first ejector 4 are coupled in parallel. In the refrigeration cycle, the high-temperature, high-pressure gas, such as refrigerant, supplied by second heat exchanger 8 to condenser 3 exchanges heat with condenser 3, liquefying the gas into liquid refrigerant. The refrigerant then enters third heat exchanger 9 for further subcooling to reduce its enthalpy. After being throttled by expansion valve 6, the refrigerant enters evaporator 7 to absorb heat, reducing the heat of the air surrounding evaporator 7. Afterward, the refrigerant enters third heat exchanger 9, is heated, and then splits into two paths, entering first branch 22 and second branch 23 respectively. The refrigerant entering first branch 22 enters first ejector 4 through the ejector inlet and mixes with the mainstream fluid (refrigerant) flowing out of first heat exchanger 2. It then mixes with the high-temperature, high-pressure gaseous refrigerant discharged by compressor 10 in second branch 23. Both then sequentially enter second heat exchanger 8 and condenser 3, forming the refrigeration cycle.

[0039] In addition, the two-phase refrigerant flowing out of the middle outlet of the condenser 3 enters the second ejector 5 through the ejector inlet of the second ejector 5, mixes with the mainstream fluid flowing through the second ejector 5, and then flows into the second heat exchanger 8 to absorb heat. Then it returns to the first heat exchanger 2 through the pipeline between the second outlet of the second heat exchanger 8 and the inlet of the first heat exchanger 2. After absorbing waste heat and increasing the enthalpy value, it re-enters the first ejector pipeline and the second ejector pipeline as the mainstream fluid.

[0040] With this configuration, by setting up a second heat exchanger 8, the high-temperature fluid flowing out of the first injection pipe can heat the fluid coming out of the second injection pipe in the second heat exchanger 8, thereby increasing the enthalpy of the fluid returning to the first heat exchanger 2 through the second heat exchanger 8, and increasing the enthalpy of the fluid flowing from the first heat exchanger 2 to the first injection pipe and the second injection pipe, thus improving the ejection effect of the two ejectors.

[0041] In this embodiment, a waste heat recovery circulation loop is also included. A circulation medium flows in the waste heat recovery circulation loop. The waste heat recovery circulation loop includes an external radiator 12 and a booster pump. The waste heat source 1, the first heat exchanger 2, the external radiator 12 and the booster pump are connected in sequence to form a closed loop. The booster pump, such as a water pump 13, serves as the circulation power for the circulation medium.

[0042] like Figure 2 , Figure 3 , Figure 4 As shown, for the process of heating by waste heat recovery, if it is necessary to dissipate heat from the waste heat source 1, such as a fuel cell, the circulating medium absorbs heat from the waste heat source 1, exchanges heat with the mainstream fluid (refrigerant) in the first heat exchanger 2, releases heat and flows into the external heat exchanger, and then returns to the waste heat source 1 after being pressurized by the water pump 13, forming a closed loop.

[0043] In other embodiments, a series-assisted operation mode of compressor 10 is adopted. The regenerative pipeline includes a first branch 22 and a third branch 24. The first branch 22 is connected between the second outlet of the third heat exchanger 9 and the injection inlet of the first ejector 4, and a one-way valve 11 is provided in the first branch 22. The third branch 24 is connected between the outlet of the first ejector 4 and the first inlet of the second heat exchanger 8, and a compressor 10 is provided on the third branch 24.

[0044] like Figure 3 As shown, compressor 10 is coupled in series with first ejector 4. In the refrigeration cycle, the high-temperature, high-pressure gas, such as refrigerant, supplied by second heat exchanger 8 to condenser 3 exchanges heat with condenser 3, liquefying the gas into liquid refrigerant. The refrigerant then enters third heat exchanger 9 for further subcooling to reduce its enthalpy. After being throttled by expansion valve 6, the refrigerant enters evaporator 7 to absorb heat, reducing the heat of the air surrounding evaporator 7. Afterward, the refrigerant enters third heat exchanger 9, is heated, and then enters first branch 22, passing through first ejector 4 and then third branch 24 before entering second heat exchanger 8. During this process, the refrigerant entering first branch 22 enters first ejector 4 through the ejector inlet and mixes with the mainstream fluid flowing out of first heat exchanger 2. It then enters compressor 10 in third branch 24, where it is discharged as high-temperature, high-pressure gaseous refrigerant. This gas first enters second heat exchanger 8 to release heat, and then enters condenser 3 to exchange heat with the air, thus forming the refrigeration cycle.

[0045] In addition, the two-phase refrigerant flowing out of the middle outlet of the condenser 3 enters the second ejector 5 through the ejector inlet of the second ejector 5, mixes with the mainstream fluid flowing through the second ejector 5, and then flows into the second heat exchanger 8 to absorb heat. Then it returns to the first heat exchanger 2 through the pipeline between the second outlet of the second heat exchanger 8 and the inlet of the first heat exchanger 2. After absorbing waste heat and increasing the enthalpy value, it re-enters the first ejector pipeline and the second ejector pipeline as the mainstream fluid.

[0046] With this configuration, by setting up a second heat exchanger 8, the high-temperature fluid flowing out of the first injection pipe can heat the fluid coming out of the second injection pipe in the second heat exchanger 8, thereby increasing the enthalpy of the fluid returning to the first heat exchanger 2 through the second heat exchanger 8, and increasing the enthalpy of the fluid flowing from the first heat exchanger 2 to the first injection pipe and the second injection pipe, thus improving the ejection effect of the two ejectors.

[0047] In other embodiments, a pure ejector operating mode is adopted, and the regenerative pipeline only includes a first branch 22 connecting the second outlet of the third heat exchanger 9 and the ejector inlet of the first ejector 4, and a one-way valve 11 is provided in the first branch 22.

[0048] like Figure 4 As shown, when compressor 10 is not operating, in the refrigeration cycle, the high-temperature, high-pressure gas, such as refrigerant, supplied by the second heat exchanger 8 to the condenser 3 exchanges heat with the condenser 3. The high-temperature, high-pressure gas is liquefied, becoming liquid refrigerant. The refrigerant then enters the third heat exchanger 9 for further subcooling to reduce its enthalpy. After being throttled by the expansion valve 6, the refrigerant enters the evaporator 7 to absorb heat, reducing the heat of the air surrounding the evaporator 7. Subsequently, the refrigerant enters the third heat exchanger 9, is heated, and then enters the regenerative pipeline. After passing through the first ejector 4, it enters the second heat exchanger 8. During this process, the gaseous refrigerant entering the regenerative pipeline enters the first ejector 4 through the ejector inlet and mixes with the mainstream fluid flowing out of the first heat exchanger 2. It then enters the second heat exchanger 8 to release heat and finally enters the condenser 3 to exchange heat with the air, thus forming the refrigeration cycle.

[0049] In addition, the two-phase refrigerant flowing out of the middle outlet of the condenser 3 enters the second ejector 5 through the ejector inlet of the second ejector 5, mixes with the mainstream fluid flowing through the second ejector 5, and then flows into the second heat exchanger 8 to absorb heat. Then it returns to the first heat exchanger 2 through the pipeline between the second outlet of the second heat exchanger 8 and the inlet of the first heat exchanger 2. After absorbing waste heat and increasing the enthalpy value, it re-enters the first ejector pipeline and the second ejector pipeline as the mainstream fluid.

[0050] With this configuration, by setting up a second heat exchanger 8, the high-temperature fluid flowing out of the first injection pipe can heat the fluid coming out of the second injection pipe in the second heat exchanger 8, thereby increasing the enthalpy of the fluid returning to the first heat exchanger 2 through the second heat exchanger 8, and increasing the enthalpy of the fluid flowing from the first heat exchanger 2 to the first injection pipe and the second injection pipe, thus improving the ejection effect of the two ejectors.

[0051] In some embodiments, a pure compressor 10 operating mode is adopted, the first injection pipeline and the second injection pipeline are disconnected, and the regenerative pipeline includes only the second branch 23 connected between the second outlet of the third heat exchanger 9 and the first inlet of the second heat exchanger 8, and the compressor 10 is provided in the second branch 23.

[0052] like Figure 5 As shown, the first ejector 4 and the second ejector 5 are closed, the first and second ejector lines are disconnected, and the connection between the condenser 3 and the second ejector 5 is broken. The liquid refrigerant enters the third heat exchanger 9 for further subcooling to reduce its enthalpy. After that, the refrigerant is throttled by the expansion valve 6 and enters the evaporator 7 to absorb heat, reducing the heat of the air around the evaporator 7. Then, the refrigerant enters the third heat exchanger 9, is heated, and enters the compressor 10 in the second branch 23. The compressor 10 discharges high-temperature and high-pressure gaseous refrigerant, which first enters the second heat exchanger 8 to release heat, and then enters the condenser 3 to exchange heat with the air, forming liquid refrigerant again, which then enters the third heat exchanger 9, thus forming a refrigeration cycle loop.

[0053] In this embodiment, a pure compressor 10 operating mode is adopted. For the waste heat recovery circuit, an in-vehicle heat exchanger 14 is connected in parallel between the first heat exchanger 2 and the external radiator 12. A first valve 15 is installed in the pipeline where the in-vehicle heat exchanger 14 is located, and a second valve 16 is also installed in the pipeline between the first heat exchanger 2 and the external radiator 12. The first valve 15 and the second valve 16 can be solenoid valves. Thus, in the pure compressor 10 operating mode, the process of heating waste heat recovery can realize the heat dissipation of the waste heat source 1, such as the fuel cell, and the function of heating the interior of the vehicle. At this time, the first heat exchanger 2 does not work.

[0054] like Figure 1 and Figure 6 As shown, the pipeline where the in-vehicle heat exchanger 14 is located is connected in parallel with the second valve 16. By closing the first valve 15 and opening the second valve 16, the connection of the in-vehicle heat exchanger 14 is disconnected. After the circulating medium absorbs heat from the waste heat source 1, it flows into the external heat exchanger to dissipate heat to the air. Then, after being pressurized by the water pump 13, it returns to the waste heat source 1, forming a closed loop and realizing the heat dissipation function of the waste heat source 1.

[0055] like Figure 1 and Figure 7 As shown, by closing the second valve 16 and opening the first valve 15, the in-vehicle heat exchanger 14 and the external radiator 12 are connected in series. At this time, the fan of the external radiator 12 does not work. After the circulating medium absorbs heat from the waste heat source 1, it enters the in-vehicle heat exchanger 14, releases heat, and flows into the external heat exchanger. Then, after being pressurized by the water pump 13, it returns to the waste heat source 1, forming a closed loop and realizing the function of circulating heating inside the vehicle.

[0056] This invention provides a waste heat-driven thermal management system, comprising a dual-ejector coupled refrigeration cycle loop and a waste heat recovery cycle loop, wherein, as... Figure 1 As shown, the dual-ejector coupled refrigeration cycle circuit includes a first heat exchanger 2, a first ejector 4, a second ejector 5, a condenser 3, an expansion valve 6, an evaporator 7, five solenoid valves, a one-way valve 11, a second heat exchanger 8, a third heat exchanger 9, and a compressor 10.

[0057] The five solenoid valves are: a first solenoid valve 17 located between the one-way valve 11 and the second outlet of the third heat exchanger 9; a second solenoid valve 18 located between the compressor 10 and the second outlet of the third heat exchanger 9; a third solenoid valve 19 located between the compressor 10 and the first inlet of the second heat exchanger 8; a fourth solenoid valve 20 located between the first ejector 4 and the first inlet of the second heat exchanger 8; and a fifth solenoid valve 21 located between the compressor 10 and the first ejector 4 in the third branch 24. By opening or closing the solenoid valves in different positions, the above-mentioned different operating modes can be achieved. For example, only the fifth solenoid valve can be closed. 21. Open the other four solenoid valves to achieve the parallel auxiliary working mode of compressor 10; close the second solenoid valve 18 and the fourth solenoid valve 20, and open the other three solenoid valves to achieve the series auxiliary working mode of compressor 10; close the second solenoid valve 18, the third solenoid valve 19 and the fifth solenoid valve 21, and open the other two solenoid valves to achieve the pure injector working mode; open the second solenoid valve 18 and the third solenoid valve 19, close the other three solenoid valves, and close the two injectors to achieve the pure compressor 10 working mode. By switching between different working modes, it is possible to better adapt to different operating conditions.

[0058] The waste heat recovery loop of the fuel cell includes the fuel cell, the first heat exchanger 2, the first valve 15, the second valve 16, the in-vehicle heat exchanger 14, the water pump 13 and the external radiator 12. By opening or closing the first valve 15 or the second valve 16, the waste heat can be used to directly heat the vehicle interior, so as to better utilize the low-grade heat source.

[0059] The thermal management system of this invention can realize different working modes of the dual-injector coupled refrigeration cycle loop and the fuel cell waste heat recovery cycle loop by opening or closing different solenoid valves, thereby reducing the overall energy consumption of the thermal management system by maximizing the rational use of energy.

[0060] This invention provides a waste heat utilization thermal management system, including a dual-injector coupled refrigeration cycle loop and a fuel cell waste heat recovery cycle loop. Addressing the issues of high energy consumption in transportation vehicle thermal management and the greenhouse effect of the working fluid, it utilizes the recovered waste heat as part or all of the power to drive a hybrid injection refrigeration cycle, and can directly heat the vehicle using the recovered waste heat, significantly reducing the energy consumption of the thermal management system. It is applicable to various transportation vehicles such as fuel cell buses or ships.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A waste heat utilization thermal management system, characterized in that, include: Waste heat source (1); The first heat exchanger (2) is connected to the waste heat source (1) and is used to absorb the heat transferred by the waste heat source (1); The condenser (3) is connected in parallel with the first heat exchanger (2) by a first injection pipe and a second injection pipe, wherein a first injector (4) is provided in the first injection pipe and a second injector (5) is provided in the second injection pipe. Evaporator (7), a heat absorption pipe is connected between the evaporator (7) and the condenser (3) for absorbing the heat of the evaporator (7), and a heat return pipe is provided between the evaporator (7) and the condenser (3) for returning the heat of the evaporator (7) to the condenser (3). Waste heat recovery circulation loop, in which a circulation medium flows, the waste heat recovery circulation loop includes an external radiator (12) and a booster pump, the waste heat source (1), the first heat exchanger (2), the external radiator (12) and the booster pump are connected in sequence to form a closed loop; The second heat exchanger (8) has its first outlet connected to the inlet of the condenser (3), its first inlet connected to the first injection pipe, its second inlet connected to the second injection pipe, and its second outlet connected to the inlet of the first heat exchanger (2) via a pipe.

2. The waste heat utilization thermal management system according to claim 1, characterized in that, The intermediate outlet of the condenser (3) is connected to the ejector inlet of the second ejector (5) via a pipeline.

3. The waste heat utilization thermal management system according to claim 1, characterized in that, A third heat exchanger (9) is provided in the heat absorption pipeline. The first inlet of the third heat exchanger (9) is connected to the outlet of the condenser (3) through a pipeline. The first outlet of the third heat exchanger (9) is connected to the inlet of the evaporator (7) through a pipeline. The outlet of the evaporator (7) is connected to the second inlet of the third heat exchanger (9) through a pipeline. The second outlet of the third heat exchanger (9) is connected to the heat recovery pipeline.

4. The waste heat utilization thermal management system according to claim 3, characterized in that, An expansion valve (6) is provided in the pipeline between the first outlet of the third heat exchanger (9) and the inlet of the evaporator (7).

5. The waste heat utilization thermal management system according to claim 3, characterized in that, The regenerative pipeline includes a first branch (22), which is connected between the second outlet of the third heat exchanger (9) and the injection inlet of the first ejector (4), and a one-way valve (11) is provided in the first branch (22).

6. The waste heat utilization thermal management system according to claim 5, characterized in that, The regenerative pipeline also includes a second branch (23), which is connected between the second outlet of the third heat exchanger (9) and the first inlet of the second heat exchanger (8), and a compressor (10) is provided in the second branch (23).

7. The waste heat utilization thermal management system according to claim 5, characterized in that, The regenerative pipeline also includes a third branch (24), which is connected between the outlet of the first ejector (4) and the first inlet of the second heat exchanger (8), and a compressor (10) is provided on the third branch (24).

8. The waste heat utilization thermal management system according to claim 1, characterized in that, An in-vehicle heat exchanger (14) is connected in parallel between the first heat exchanger (2) and the external radiator (12). A first valve (15) is installed in the pipeline where the in-vehicle heat exchanger (14) is located, and a second valve (16) is installed in the pipeline between the first heat exchanger (2) and the external radiator (12).

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