Aerocar waste heat refrigerating system

Abstract

The invention relates to the technical field of automobile heat management systems, in particular to a hovercar waste heat refrigerating system which comprises an air supply compressor. An outlet of the evaporator communicates with an air suction port of the air supply compressor; the evaporator is communicated with the passenger compartment; an inlet of the condenser is communicated with an exhaust port of the air supply compressor; an inlet of the expansion work recovery device is communicated with an outlet of the condenser, the expansion work recovery device is provided with a high-pressure side outlet and a low-pressure side outlet, the high-pressure side outlet is communicated with an inlet of the evaporator, and the low-pressure side outlet is communicated with an air supply port of the air supply compressor to form circulation; and the expansion work recovery device is connected with the waste heat module. Through the expansion work recovery device, the work consumption of the compressor can be effectively reduced, the circulation efficiency is improved, and the system energy consumption is reduced; and in addition, a quasi-two-stage compression cycle framework is constructed, through the medium-pressure air supply design of the air supply compressor, the pressure ratio limitation of a traditional single-stage compression system is broken through, the variable working condition adaptive capacity is improved, and the refrigeration requirements of variable working conditions of the hovercar are effectively met.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive thermal management systems, and particularly to a waste heat refrigeration system for a flying car. Background Art

[0002] As a disruptive technology that combines ground transportation and low-altitude flight, a flying car is regarded as an innovative carrier for solving urban traffic congestion and constructing a three-dimensional transportation network, and has become a strategic emerging industry that major world science and technology powers are competing to layout.

[0003] The heat generation intensity of the power system of a flying car (such as a hydrogen fuel cell, a high-density battery) far exceeds that of traditional aircraft. Moreover, under complex working conditions such as vertical takeoff and landing, high-speed cruising, etc., the battery, electric drive system, and the environment of the passenger cabin face extreme temperature fluctuations, seriously affecting flight safety and component life. As the cold and heat source center of the thermal management system, refrigeration / heat pump is one of the core technologies of a flying car, which is crucial for ensuring passenger safety and comfort, improving flight performance and efficiency, and adapting to complex and changeable application scenarios.

[0004] However, the thermal management system of the refrigeration / heat pump cycle in the prior art is difficult to cope with the strong time-varying heat load impact caused by the instantaneous jump of the discharge power from cruise flight to takeoff and landing, and there is a problem of large load fluctuations under variable working conditions. Summary of the Invention

[0005] The present invention provides a waste heat refrigeration system for a flying car to solve the defect of large load fluctuations under variable working conditions in the prior art and achieve the improvement of the adaptability to variable working conditions.

[0006] The present invention provides a waste heat refrigeration system for a flying car, comprising: A gas injection compressor; An evaporator, the outlet of the evaporator is communicated with the suction port of the gas injection compressor; and the evaporator is communicated with the passenger cabin; A condenser, the inlet of the condenser is communicated with the discharge port of the gas injection compressor; An expansion work recovery device, the inlet is communicated with the outlet of the condenser, the expansion work recovery device has a high-pressure side outlet and a low-pressure side outlet, the high-pressure side outlet is communicated with the inlet of the evaporator, the low-pressure side outlet is communicated with the gas injection port of the gas injection compressor to form a cycle; and the expansion work recovery device is connected with the waste heat module.

[0007] According to a waste heat refrigeration system for a flying car provided by the present invention, the expansion work recovery device includes a gas supplement evaporator, a first ejector, a second ejector, a first expansion valve, a second expansion valve, and a steam generator. The gas supplement port of the gas supplement compressor is connected to the outlet of the first ejector; the outlet of the steam generator is connected to the working fluid inlet of the first ejector and the working fluid inlet of the second ejector, and the inlet of the steam generator is connected to the outlet of the second ejector; the entrainment fluid inlet of the second ejector is connected to the outlet of the condenser; the inlet of the first expansion valve is connected to the outlet of the condenser, the inlet of the gas supplement evaporator is connected to the outlet of the first expansion valve, the saturated liquid outlet of the gas supplement evaporator is connected to the inlet of the second expansion valve, the saturated gas outlet of the gas supplement evaporator is connected to the entrainment fluid inlet of the first ejector, and the outlet of the second expansion valve is connected to the inlet of the evaporator; both the gas supplement evaporator and the steam generator are connected to the waste heat module.

[0008] According to a waste heat refrigeration system for a flying car provided by the present invention, the expansion work recovery device further includes a third ejector. The entrainment fluid inlet of the third ejector is communicated with the exhaust port of the gas supplement compressor, the working fluid inlet of the third ejector is communicated with the outlet of the steam generator, and the outlet of the third ejector is communicated with the inlet of the condenser.

[0009] According to a waste heat refrigeration system for a flying car provided by the present invention, the expansion work recovery device includes a first ejector, a second ejector, a second expansion valve, a steam generator, an intermediate heat exchanger, a third expansion valve, and a waste heat exchanger. The gas supplement port of the gas supplement compressor is connected to the outlet of the first ejector, and the exhaust port of the gas supplement compressor is connected to the inlet of the condenser; the outlet of the steam generator is connected to the working fluid inlet of the first ejector and the working fluid inlet of the second ejector, and the inlet of the steam generator is connected to the outlet of the second ejector; the entrainment fluid inlet of the second ejector is connected to the outlet of the condenser; the high-pressure side inlet of the intermediate heat exchanger is connected to the outlet of the condenser, the high-pressure side outlet of the intermediate heat exchanger is connected to the second expansion valve, the low-pressure side inlet of the intermediate heat exchanger is connected to the third expansion valve, the low-pressure side outlet of the intermediate heat exchanger is connected to the waste heat exchanger, and the outlet of the waste heat exchanger is connected to the entrainment fluid inlet of the first ejector; both the waste heat exchanger and the steam generator are connected to the waste heat module.

[0010] According to a waste heat refrigeration system for a flying car provided by the present invention, the expansion work recovery device includes a gas supplement evaporator, a first ejector, a first expansion valve, a second expansion valve, a steam generator, a third ejector, and a refrigerant pump. The gas supplement port of the gas supplement compressor is connected to the outlet of the first ejector, and the exhaust port of the gas supplement compressor is connected to the entrained fluid inlet of the third ejector; the outlet of the third ejector is connected to the inlet of the condenser; the outlet of the steam generator is connected to the working fluid inlet of the first ejector and the working fluid inlet of the third ejector, and the inlet of the steam generator is connected to the outlet of the refrigerant pump; the inlets of the refrigerant pump and the first expansion valve are both connected to the outlet of the condenser; the inlet of the gas supplement evaporator is connected to the outlet of the first expansion valve, the saturated liquid outlet of the gas supplement evaporator is connected to the inlet of the second expansion valve, and the saturated gas outlet of the gas supplement evaporator is connected to the entrained fluid inlet of the first ejector; both the gas supplement evaporator and the steam generator are connected to the waste heat module.

[0011] According to a waste heat refrigeration system for a flying car provided by the present invention, the waste heat module includes a battery cold plate, and the gas supplement evaporator includes: A flash tank; A coiled pipe disposed inside the flash tank, and the coiled pipe is connected to the battery cold plate.

[0012] According to a waste heat refrigeration system for a flying car provided by the present invention, the waste heat module includes a waste heat source, and the steam generator is connected to the waste heat source.

[0013] According to a waste heat refrigeration system for a flying car provided by the present invention, the waste heat source includes an electric motor or a fuel cell.

[0014] According to a waste heat refrigeration system for a flying car provided by the present invention, the waste heat module includes a battery cold plate, and the waste heat exchanger is connected to the battery cold plate.

[0015] According to a waste heat refrigeration system for a flying car provided by the present invention, the waste heat module includes a battery cold plate, and the gas supplement evaporator is connected to the battery cold plate.

[0016] The waste heat refrigeration system of the flying car provided by the present invention forms a cycle by connecting the outlet of the evaporator to the suction port of the gas injection compressor, connecting the evaporator to the passenger cabin, connecting the inlet of the condenser to the discharge port of the gas injection compressor, connecting the inlet of the expansion work recovery device to the outlet of the condenser, connecting the high-pressure side outlet of the expansion work recovery device to the inlet of the evaporator, and connecting the low-pressure side outlet to the gas injection port of the gas injection compressor. The expansion work recovery device is connected to the waste heat module and can achieve heat exchange. Through the expansion work recovery device, the power consumption of the compressor can be effectively reduced, the cycle efficiency can be improved, and the system energy consumption can be reduced. In addition, a quasi-two-stage compression cycle architecture is constructed. Through the medium-pressure gas injection design of the gas injection compressor, the pressure ratio limit of the traditional single-stage compression system is broken, the variable condition adaptability is improved, and the refrigeration requirements of the flying car under various working conditions can be effectively met. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of the first embodiment of the waste heat refrigeration system of the flying car provided by the present invention.

[0019] Figure 2 It is a pressure-enthalpy diagram of the first embodiment of the waste heat refrigeration system of the flying car provided by the present invention.

[0020] Figure 3 It is a schematic structural diagram of the second embodiment of the waste heat refrigeration system of the flying car provided by the present invention.

[0021] Figure 4 It is a schematic structural diagram of the third embodiment of the waste heat refrigeration system of the flying car provided by the present invention.

[0022] Figure 5 It is a schematic structural diagram of the fourth embodiment of the waste heat refrigeration system of the flying car provided by the present invention.

[0023] REFERENCE NUMERALS: 1. Gas injection compressor; 2. Condenser; 3. Evaporator; 4. Gas injection evaporator; 5. First ejector; 6. Second ejector; 7. First expansion valve; 8. Second expansion valve; 9. Steam generator; 10. Waste heat source; 11. Battery cold plate; 12. Intermediate heat exchanger; 13. Third expansion valve; 14. Third ejector; 15. Refrigerant pump; 16. Waste heat heat exchanger. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of 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 thus should not be construed as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0026] The following will be combined with Figures 1 - 5 The waste heat refrigeration system of the flying car of the present invention will be described. It includes a gas replenishing compressor 1, a condenser 2, an evaporator 3 and an expansion work recovery device. The outlet of the evaporator 3 is communicated with the suction port of the gas replenishing compressor 1; and the evaporator 3 is communicated with the passenger cabin, and the refrigeration effect on the passenger cabin is achieved through the evaporator 3. The inlet of the condenser 2 is communicated with the exhaust port of the gas replenishing compressor 1. The inlet of the expansion work recovery device is communicated with the outlet of the condenser 2. The expansion work recovery device has a high-pressure side outlet and a low-pressure side outlet. The high-pressure side outlet is communicated with the inlet of the evaporator 3, and the low-pressure side outlet is communicated with the gas replenishing port of the gas replenishing compressor 1 to form a cycle. The expansion work recovery device is connected to the waste heat module.

[0027] In the embodiments of the present invention, through the expansion work recovery device, the power consumption of the compressor is effectively reduced, the cycle efficiency is improved, and the system energy consumption is reduced; in addition, a quasi-two-stage compression cycle architecture is constructed. Through the medium-pressure gas replenishing design of the gas replenishing compressor 1, the pressure ratio limit of the traditional single-stage compression system is broken through, the variable working condition adaptation ability is improved, and the refrigeration requirements of the flying car under various variable working conditions can be effectively met.

[0028] As Figure 1As shown, in some feasible embodiments of the present invention, the expansion recovery device includes a gas-feeding evaporator 4, a first ejector 5, a second ejector 6, a first expansion valve 7, a second expansion valve 8, and a steam generator 9, and the waste heat module includes a waste heat source 10 and a battery cold plate 11. The gas-feeding port of the gas-feeding compressor 1 is connected to the outlet of the first ejector 5, and the exhaust port of the gas-feeding compressor 1 is connected to the inlet of the condenser 2; the outlet of the steam generator 9 is connected to the working fluid inlets of the first ejector 5 and the second ejector 6, and the inlet of the steam generator 9 is connected to the outlet of the second ejector 6; the entrainment fluid inlet of the second ejector 6 is connected to the outlet of the condenser 2; the inlet of the first expansion valve 7 is connected to the outlet of the condenser 2, the inlet of the gas-feeding evaporator 4 is connected to the outlet of the first expansion valve 7, the saturated liquid outlet of the gas-feeding evaporator 4 is connected to the inlet of the second expansion valve 8, the saturated gas outlet of the gas-feeding evaporator 4 is connected to the entrainment fluid inlet of the first ejector 5, and the outlet of the second expansion valve 8 is connected to the inlet of the evaporator 3.

[0029] Among them, the gas-feeding evaporator 4 exchanges heat with the battery cold plate 11 to dissipate heat from the battery cold plate 11, thereby realizing temperature control of the battery.

[0030] By exchanging heat between the steam generator 9 and the waste heat source 10, heat is dissipated from the waste heat source 10, thereby realizing temperature control of the waste heat source 10.

[0031] In this embodiment, the first ejector 5 and the second ejector 6 are used as the expansion work recovery device, which effectively reduces the power consumption of the compressor, improves the cycle efficiency, and reduces the system energy consumption. Moreover, this embodiment adopts a multi-stage temperature zone coupling heat exchange technology, and through the synergistic effect of the evaporator 3 and the gas-feeding evaporator 4, precise matching and dynamic matching of the cooling capacity in different temperature zones are realized.

[0032] Such as Figure 2As shown in the figure, the working fluid circulation process of the waste heat refrigeration system of the flying car provided in the above embodiments is described. The exhaust gas of the gas replenishing compressor 1 (state point A) becomes a subcooled liquid (state point B) after heat release and condensation in the condenser 2. Subsequently, it is divided into two parts. One part serves as the entrainment fluid of the second ejector 6, mixes with the working fluid of the second ejector 6 to boost the pressure (state point M), enters the steam generator 9 to exchange heat with the waste heat source 10 to become a high-temperature and high-pressure gas (state point L), and serves as the working fluid of the first ejector 5 and the second ejector 6. The other part passes through the first expansion valve 7 (state point C) and enters the gas replenishing evaporator 4 to exchange heat with the battery cold plate 11 (state point D). In the gas replenishing evaporator 4, the saturated gas and the saturated liquid are separated. The saturated gas (state point F) serves as the entrainment fluid and enters the first ejector 5, mixes with the working fluid to boost the pressure, and then enters the gas replenishing port of the gas replenishing compressor 1 (state point K). The saturated liquid (state point E) is further depressurized through the second expansion valve 8 (state point G), and then enters the evaporator 3 to absorb heat and become a low-temperature and low-pressure gas (state point H), enters the suction port of the gas replenishing compressor 1, is compressed to an intermediate pressure (state point I), and then mixes with the gas replenishing gas (state point J), and then continues to be compressed to the exhaust pressure (state point A) to complete the cycle.

[0033] As Figure 3 shown, furthermore, on the basis of the above embodiments, the embodiment of the present invention further includes a third ejector 14. The entrainment fluid inlet of the third ejector 14 is communicated with the exhaust port of the gas replenishing compressor 1, and the outlet of the third ejector 14 is communicated with the inlet of the condenser 2; and the outlet of the steam generator 9 is connected to the working fluid inlet of the third ejector 14.

[0034] In the above embodiments, the exhaust gas of the gas replenishing compressor 1 first enters the third ejector 14, serves as the entrainment fluid to mix with the working fluid to boost the pressure, and then passes through the condenser 2 for heat release and condensation, and is divided into two parts. One part serves as the entrainment fluid of the second ejector 6, mixes with the second ejector 6 to boost the pressure, and then enters the steam generator 9 to exchange heat with the waste heat source 10 to become a high-temperature and high-pressure gas, and serves as the working fluid of the first ejector 5, the second ejector 6 and the third ejector 14. The other part passes through the first expansion valve 7 and enters the gas replenishing evaporator 4 to exchange heat with the battery cold plate 11. In the gas replenishing evaporator 4, the saturated gas and the saturated liquid are separated. The saturated gas serves as the entrainment fluid and enters the first ejector 5, mixes with the working fluid to boost the pressure, and then enters the gas replenishing port of the gas replenishing compressor 1. The saturated liquid is further depressurized through the second expansion valve 8, and then enters the evaporator 3 to absorb heat and become a low-temperature and low-pressure gas, enters the suction port of the gas replenishing compressor 1, is compressed to an intermediate pressure, and then mixes with the gas replenishing gas, and then continues to be compressed to the exhaust pressure to complete the cycle.

[0035] As Figure 4As shown, in some other feasible embodiments of the present invention, the expansion work recovery device includes a first ejector 5, a second ejector 6, a second expansion valve 8, a steam generator 9, an intermediate heat exchanger 12, a third expansion valve 13, and a waste heat exchanger 16. The gas supplement port of the gas supplement compressor 1 is connected to the outlet of the first ejector 5, and the exhaust port of the gas supplement compressor 1 is connected to the inlet of the condenser 2. The outlet of the steam generator 9 is connected to the working fluid inlets of the first ejector 5 and the second ejector 6, and the inlet of the steam generator 9 is connected to the outlet of the second ejector 6. The entrainment fluid inlet of the second ejector 6 is connected to the outlet of the condenser 2. The high-pressure side inlet of the intermediate heat exchanger 12 is connected to the outlet of the condenser 2, the high-pressure side outlet of the intermediate heat exchanger 12 is connected to the second expansion valve 8, the low-pressure side inlet of the intermediate heat exchanger 12 is connected to the third expansion valve 13, the low-pressure side outlet of the intermediate heat exchanger 12 is connected to the waste heat exchanger 16, and the outlet of the waste heat exchanger 16 is connected to the entrainment fluid inlet of the first ejector 5.

[0036] In the above embodiments, the exhaust gas of the gas supplement compressor 1 is divided into three parts after heat release and condensation in the condenser 2. The first part is used as the entrainment fluid of the second ejector 6, which is mixed with the second ejector 6 to boost the pressure and then enters the steam generator 9 to exchange heat with the waste heat source 10 to become a high-temperature and high-pressure gas, serving as the working fluid of the first ejector 5 and the second ejector 6. The second part enters the low-pressure side of the intermediate heat exchanger 12 after passing through the third expansion valve 13, exchanges heat with the high-pressure side and then enters the heat exchanger, absorbs the heat of the battery cold plate 11, and then enters the first ejector 5 as the entrainment fluid. After being mixed with the working fluid to boost the pressure, it enters the gas supplement port of the gas supplement compressor 1. The third part enters the high-pressure side of the intermediate heat exchanger 12, releases heat to the low-pressure side and then passes through the second expansion valve 8, and then enters the evaporator 3 to absorb heat, becoming a low-temperature and low-pressure gas and entering the suction port of the gas supplement compressor 1. It is compressed to the intermediate pressure and then mixed with the gas supplement gas, and then continues to be compressed to the exhaust pressure to complete the cycle.

[0037] Specifically, in the above embodiments, the waste heat module includes a battery cold plate, and the waste heat exchanger 16 is connected to the battery cold plate 11.

[0038] As Figure 5As shown in the figure, in another embodiment of the present invention, the expansion work recovery device includes a gas supplement evaporator 4, a first ejector 5, a first expansion valve 7, a second expansion valve 8, a steam generator 9, a third ejector 14, and a refrigerant pump 15. The gas supplement port of the gas supplement compressor 1 is connected to the outlet of the first ejector 5, and the exhaust port of the gas supplement compressor 1 is connected to the entrained fluid inlet of the third ejector 14; the outlet of the third ejector 14 is connected to the inlet of the condenser 2; the outlet of the steam generator 9 is connected to the working fluid inlet of the first ejector 5 and the working fluid inlet of the third ejector 14, and the inlet of the steam generator 9 is connected to the outlet of the refrigerant pump 15; the inlets of the refrigerant pump 15 and the first expansion valve 7 are both connected to the outlet of the condenser 2; the inlet of the gas supplement evaporator 4 is connected to the outlet of the first expansion valve 7, the saturated liquid outlet of the gas supplement evaporator 4 is connected to the inlet of the second expansion valve 8, and the saturated gas outlet of the gas supplement evaporator 4 is connected to the entrained fluid inlet of the first ejector 5.

[0039] In the above embodiment, the exhaust gas of the gas supplement compressor 1 first enters the third ejector 14, mixes with the working fluid as the entrained fluid to boost the pressure, and then releases heat and condenses through the condenser 2. It is divided into two parts. One part is boosted by the refrigerant pump 15 and then enters the steam generator 9 to exchange heat with the waste heat source 10 to become a high-temperature and high-pressure gas, serving as the working fluid of the first ejector 5 and the third ejector 14. The other part passes through the first expansion valve 7 and then enters the gas supplement evaporator 4 to exchange heat with the battery cold plate 11. In the gas supplement evaporator 4, the saturated gas and the saturated liquid are separated. The saturated gas enters the first ejector 5 as the entrained fluid, mixes with the working fluid to boost the pressure, and then enters the gas supplement port of the gas supplement compressor 1. The saturated liquid is further depressurized through the second expansion valve 8, and then enters the evaporator 3 to absorb heat, becoming a low-temperature and low-pressure gas and entering the suction port of the gas supplement compressor 1. It is compressed to the intermediate pressure and then mixed with the gas supplement gas, and then continues to be compressed to the exhaust pressure to complete the cycle.

[0040] More specifically, the gas supplement evaporator 4 includes a flash tank and a coil. The coil is arranged inside the flash tank and is connected to the battery cold plate 11.

[0041] The waste heat source 10 is usually a device that generates high temperature in a new energy vehicle, such as an electric motor or a fuel cell.

[0042] In summary, the waste heat refrigeration system for flying cars provided by the present invention uses multiple ejectors as the expansion work recovery device, effectively reducing the power consumption of the compressor, improving the cycle efficiency, and reducing the system energy consumption. It adopts a multi-stage temperature zone coupling heat exchange technology, and through the synergistic effect of the evaporator 3 and the gas supplement evaporator 4, realizes the precise matching and dynamic distribution of the cooling capacity in different temperature zones. In addition, a quasi-secondary compression cycle architecture is constructed. Through the medium-pressure gas supplement design of the gas supplement compressor 1, the pressure ratio limit of the traditional single-stage compression system is broken, the variable working condition adaptability is improved, and the refrigeration demand of the flying car with variable working conditions can be effectively met.

[0043] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or mode are included in at least one embodiment or mode of the embodiments of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or modes. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or modes described in this specification and the features of different embodiments or modes.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. And these modifications or replacements 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 refrigeration system for a flying car, characterized in that, Comprising: An air-compressing compressor (1); An evaporator (3), the outlet of the evaporator (3) being in communication with the suction port of the air-compressing compressor (1); and the evaporator (3) being in communication with the occupant compartment; A condenser (2), the inlet of the condenser (2) being in communication with the discharge port of the air-compressing compressor (1); An expansion work recovery device, the inlet of which is in communication with the outlet of the condenser (2), the expansion work recovery device having a high-pressure side outlet and a low-pressure side outlet, the high-pressure side outlet being in communication with the inlet of the evaporator (3), the low-pressure side outlet being in communication with the air make-up port of the air-compressing compressor (1) to form a cycle; and the expansion work recovery device being connected to a waste heat module.

2. The waste heat refrigeration system of the flying car according to claim 1, characterized in that The expansion recovery device comprises an air make-up evaporator (4), a first ejector (5), a second ejector (6), a first expansion valve (7), a second expansion valve (8) and a steam generator (9), the air make-up port of the air-compressing compressor (1) being connected to the outlet of the first ejector (5); the outlet of the steam generator (9) being connected to the working fluid inlet of the first ejector (5) and the working fluid inlet of the second ejector (6), the inlet of the steam generator (9) being connected to the outlet of the second ejector (6); the entrained fluid inlet of the second ejector (6) being connected to the outlet of the condenser (2); the inlet of the first expansion valve (7) being connected to the outlet of the condenser (2), the inlet of the air make-up evaporator (4) being connected to the outlet of the first expansion valve (7), the saturated liquid outlet of the air make-up evaporator (4) being connected to the inlet of the second expansion valve (8), the saturated gas outlet of the air make-up evaporator (4) being connected to the entrained fluid inlet of the first ejector (5), the outlet of the second expansion valve (8) being connected to the inlet of the evaporator (3); the air make-up evaporator (4) and the steam generator (9) are both connected to the waste heat module.

3. The waste heat refrigeration system of the flying car according to claim 2, characterized in that, The expansion work recovery device further comprises a third ejector (14), the entrained fluid inlet of the third ejector (14) being in communication with the discharge port of the air-compressing compressor (1), the working fluid inlet of the third ejector (14) being in communication with the outlet of the steam generator (9), and the outlet of the third ejector (14) being in communication with the inlet of the condenser (2).

4. The waste heat refrigeration system of the flying car according to claim 1, wherein, The expansion work recovery device includes a first ejector (5), a second ejector (6), a second expansion valve (8), a steam generator (9), an intermediate heat exchanger (12), a third expansion valve (13), and a waste heat exchanger (16). The gas supply port of the gas supply compressor (1) is connected to the outlet of the first ejector (5), and the exhaust port of the gas supply compressor (1) is connected to the inlet of the condenser (2). The outlet of the steam generator (9) is connected to the working fluid inlet of the first ejector (5) and the working fluid inlet of the second ejector (6), and the inlet of the steam generator (9) is connected to the outlet of the second ejector (6). The entrainment fluid inlet of the second ejector (6) is connected to the outlet of the condenser (2). The high-pressure side inlet of the intermediate heat exchanger (12) is connected to the outlet of the condenser (2), the high-pressure side outlet of the intermediate heat exchanger (12) is connected to the second expansion valve (8), the low-pressure side inlet of the intermediate heat exchanger (12) is connected to the third expansion valve (13), the low-pressure side outlet of the intermediate heat exchanger (12) is connected to the waste heat exchanger (16), and the outlet of the waste heat exchanger (16) is connected to the entrainment fluid inlet of the first ejector (5). Both the waste heat exchanger (16) and the steam generator (9) are connected to the waste heat module.

5. The waste heat refrigeration system of the flying car according to claim 1, characterized in that, The expansion work recovery device includes a gas supply evaporator (4), a first ejector (5), a first expansion valve (7), a second expansion valve (8), a steam generator (9), a third ejector (14), and a refrigerant pump (15). The gas supply port of the gas supply compressor (1) is connected to the outlet of the first ejector (5), and the exhaust port of the gas supply compressor (1) is connected to the entrainment fluid inlet of the third ejector (14). The outlet of the third ejector (14) is connected to the inlet of the condenser (2). The outlet of the steam generator (9) is connected to the working fluid inlet of the first ejector (5) and the working fluid inlet of the third ejector (14), and the inlet of the steam generator (9) is connected to the outlet of the refrigerant pump (15). The inlet of the refrigerant pump (15) and the inlet of the first expansion valve (7) are both connected to the outlet of the condenser (2). The inlet of the gas supply evaporator (4) is connected to the outlet of the first expansion valve (7), the saturated liquid outlet of the gas supply evaporator (4) is connected to the inlet of the second expansion valve (8), and the saturated gas outlet of the gas supply evaporator (4) is connected to the entrainment fluid inlet of the first ejector (5). Both the gas supply evaporator (4) and the steam generator (9) are connected to the waste heat module.

6. The waste heat refrigeration system for a flying car according to any one of claims 2, 3, and 5, characterized in that, The waste heat module includes a battery cold plate. The gas supply evaporator (4) includes: A flash tank; A coiled pipe disposed inside the flash tank and connected to the battery cold plate.

7. The waste heat refrigeration system of a flying car according to any one of claims 2-5, characterized in that, The waste heat module includes a waste heat source (10), and the steam generator (9) is connected to the waste heat source (10).

8. The waste heat refrigeration system of the flying car according to claim 7, characterized in that, The waste heat source (10) includes an electric motor or a fuel cell.

9. The waste heat refrigeration system of the flying car according to claim 4, characterized in that, The waste heat module includes a battery cold plate (11), and the waste heat exchanger (16) is connected to the battery cold plate (11).

10. The waste heat refrigeration system for a flying car according to any one of claims 2, 3, and 5, characterized in that The waste heat module includes a battery cold plate (11), and the gas replenishing evaporator (4) is connected to the battery cold plate (11).

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