Integrated pneumatic system for vehicle

Abstract

The invention discloses an integrated pneumatic system for a vehicle. The integrated pneumatic system comprises a compression device; the heat exchange equipment is connected to the compression equipment; an air suspension connected to the compression device; the control unit is electrically connected to the compression equipment, the heat exchange equipment and the air suspension; the system is characterized in that the heat exchange equipment uses a medium treated by the compression equipment as a heat exchange medium; and the air suspension takes the medium as a working medium.

Description

Technical Field

[0001] The present invention relates to a pneumatic system, and more particularly to an integrated pneumatic system for a vehicle. Background Art

[0002] Currently, air suspension systems are mainly used to improve the comfort and handling of vehicles. These systems typically include separate compressors and control units to adjust the suspension stiffness. However, separate compressor systems mean higher costs and complexity. In-vehicle refrigerators, which are luxury accessories, usually also use separate compressors and have a different compressor medium from that of the air suspension. This results in increased costs and difficult maintenance. Under certain operating conditions, the performance of the vehicle air conditioner may be insufficient, especially in extreme weather conditions or when fully loaded. Additionally, in-vehicle refrigerators usually only have a refrigeration function and cannot handle situations where cooked food and other items need to be kept at a relatively high temperature (e.g., 50°C) for a long time.

[0003] Meanwhile, the increase in electronic devices in vehicles has made the EMC problem more severe. Noise problems, especially the vibration and noise caused by compressors, have a negative impact on passenger comfort and the overall performance of the vehicle. Integrating these separate modules effectively into the vehicle design is a challenge under the framework of the prior art. Considerations need to be given to spatial configuration, weight distribution, and the interaction between systems. Summary of the Invention

[0004] To solve the above technical problems, the present invention proposes an integrated pneumatic system. The integrated pneumatic system according to the present invention integrates an air suspension, an in-vehicle thermostat, and an auxiliary air conditioner together, with the three systems sharing one compressor and one carbon dioxide medium.

[0005] The present invention discloses an integrated pneumatic system for a vehicle, which includes: a compression device; a heat exchange device connected to the compression device; an air suspension connected to the compression device; a control unit electrically connected to the compression device, the heat exchange device, and the air suspension; characterized in that the heat exchange device uses the medium processed by the compression device as a heat exchange medium; and the air suspension uses the medium as a working medium.

[0006] According to an optional embodiment, the integrated pneumatic system includes: a bypass pipe connecting from the heat exchange device to the air suspension; and a throttle valve disposed in the bypass pipe and electrically connected to the control unit.

[0007] According to an alternative embodiment, the compression device includes: a cavity; a first exhaust valve and a second exhaust valve, both of which are disposed in the cavity and have different exhaust pressures, wherein the exhaust pressure of the second exhaust valve is higher than that of the first exhaust valve; an electric motor, which is connected to the cavity; an inverter, which is electrically connected to the control unit and the electric motor; a low-pressure heat exchange medium pipeline, which is connected from the heat exchange device to the cavity; a low-pressure gas pipeline, which is connected from the air suspension to the first solenoid valve; a high-pressure heat exchange medium pipeline, which is connected from the second exhaust valve to the heat exchange device; a suspension input pipeline, which is connected from the first exhaust valve to the air suspension; a first solenoid valve, which is disposed in the low-pressure heat exchange medium pipeline; a second solenoid valve, which is disposed in the suspension input pipeline; and a first check valve, which is disposed in the low-pressure gas pipeline.

[0008] According to an alternative embodiment, the air suspension includes: a seventh solenoid valve, which is connected to the suspension input pipeline; a suspension gas pipeline, which is connected to the seventh solenoid valve; a plurality of suspension solenoid valves, which are connected to the suspension gas pipeline; a second pressure sensor, which is connected to the suspension gas pipeline between the seventh solenoid valve and the plurality of suspension solenoid valves; a first gas storage tank, which is connected to the suspension gas pipeline between the second pressure sensor and the plurality of suspension solenoid valves; a plurality of suspension devices, one side of which is connected to the corresponding suspension solenoid valve among the plurality of suspension solenoid valves, and the other side of which is connected to the low-pressure gas pipeline; a second gas storage tank, which is disposed in the low-pressure gas pipeline between the first check valve and the plurality of suspension devices; a second check valve, which is disposed in the low-pressure gas pipeline between the second gas storage tank and the plurality of suspension devices; and a third pressure sensor, which is connected to the low-pressure gas pipeline between the first check valve and the second gas storage tank.

[0009] According to an alternative embodiment, the second pressure sensor is configured to measure the pressure of the medium in the suspension gas pipeline and the pressure of the medium in the first gas storage tank; and the third pressure sensor is configured to measure the pressure of the medium connected to the low-pressure gas pipeline and the pressure of the medium in the second gas storage tank.

[0010] According to an alternative embodiment, the control unit is configured to control the compression device according to the pressures measured by the second pressure sensor and the third pressure sensor, such that the pressure of the medium in the first gas storage tank is higher than the pressure of the medium in the second gas storage tank.

[0011] According to an alternative embodiment, the control unit is configured to control the compression device such that the pressure of the medium in the first gas storage tank is higher than the pressure of the medium in the second gas storage tank by at least 5 bar.

[0012] According to an alternative embodiment, the control unit is configured to, during the operation of the air suspension, when the pressures measured by the second pressure sensor and the third pressure sensor are higher than a threshold value, control the second exhaust valve to open, so that the excess medium in the air suspension is compressed by the compression device and then enters the heat exchange device; and the control unit is configured to, during the operation of the air suspension, when the pressures measured by the second pressure sensor and the third pressure sensor are lower than the threshold value, control the first exhaust valve to open, so that the medium from the heat exchange device and the air suspension is compressed in the compression device and then returned to the air suspension.

[0013] According to an alternative embodiment, the heat exchange device is an in-vehicle thermostat and includes: a first pressure sensor disposed in the high-pressure heat exchange medium pipeline; a third solenoid valve connected to the high-pressure heat exchange medium pipeline; an external heat exchanger connected to the third solenoid valve; a fan disposed close to the external heat exchanger; an expansion valve connected to the external heat exchanger; a fourth solenoid valve connected to the expansion valve; a thermostat evaporator connected to the fourth solenoid valve; a gas-liquid separator connected to the thermostat evaporator and the low-pressure heat exchange medium pipeline; a fifth solenoid valve connected to the high-pressure heat exchange medium pipeline between the first pressure sensor and the third solenoid valve; a thermostat heat exchanger connected to the fifth solenoid valve; an expansion valve connected to the thermostat heat exchanger on one side and between the third solenoid valve and the external heat exchanger on the other side; and a sixth solenoid valve connected to the gas-liquid separator on one side and between the external heat exchanger and the expansion valve on the other side.

[0014] According to an alternative embodiment, the heat exchange device includes an auxiliary air conditioner and an in-vehicle thermostat, and further includes: a first pressure sensor disposed in the high-pressure heat exchange medium pipeline; a third solenoid valve connected to the high-pressure heat exchange medium pipeline; an external heat exchanger connected to the third solenoid valve; a fan disposed close to the external heat exchanger; an expansion valve connected to the external heat exchanger; a fourth solenoid valve and an eighth solenoid valve, which are connected in parallel and connected to the expansion valve; a thermostat evaporator disposed in the in-vehicle thermostat and connected to the fourth solenoid valve; an air conditioner evaporator disposed in the auxiliary air conditioner and connected to the eighth solenoid valve; a gas-liquid separator connected to the thermostat evaporator and the low-pressure heat exchange medium pipeline; a fifth solenoid valve and a ninth solenoid valve, which are connected in parallel and connected to the high-pressure heat exchange medium pipeline between the first pressure sensor and the third solenoid valve; an air conditioner heat exchanger disposed in the auxiliary air conditioner and connected to the ninth solenoid valve; a thermostat heat exchanger disposed in the in-vehicle thermostat and connected to the fifth solenoid valve; an expansion valve connected to the air conditioner heat exchanger and the thermostat heat exchanger on one side and between the third solenoid valve and the external heat exchanger on the other side; and a sixth solenoid valve connected to the gas-liquid separator on one side and between the external heat exchanger and the expansion valve on the other side.

[0015] According to an alternative embodiment, the heat exchange device is a vehicle-mounted refrigerator and includes: a first pressure sensor disposed in the high-pressure heat exchange medium pipeline; a third solenoid valve connected to the high-pressure heat exchange medium pipeline; an external heat exchanger connected to the third solenoid valve; a fan disposed close to the external heat exchanger; an expansion valve connected to the external heat exchanger; a fourth solenoid valve connected to the expansion valve; a thermostatic chamber evaporator connected to the fourth solenoid valve; and a gas-liquid separator connected to the thermostatic chamber evaporator and the low-pressure heat exchange medium pipeline.

[0016] According to an alternative embodiment, the heat exchange device includes an auxiliary air conditioner and a vehicle-mounted refrigerator, and further includes: a first pressure sensor disposed in the high-pressure heat exchange medium pipeline; a third solenoid valve connected to the high-pressure heat exchange medium pipeline; an external heat exchanger connected to the third solenoid valve; a fan disposed close to the external heat exchanger; an expansion valve connected to the external heat exchanger; a fourth solenoid valve and an eighth solenoid valve, which are connected in parallel and connected to the expansion valve; a thermostatic chamber evaporator disposed in the vehicle-mounted thermostatic chamber and connected to the fourth solenoid valve; an air conditioner evaporator disposed in the auxiliary air conditioner and connected to the eighth solenoid valve; a gas-liquid separator connected to the thermostatic chamber evaporator and the low-pressure heat exchange medium pipeline; a ninth solenoid valve connected to the high-pressure heat exchange medium pipeline between the first pressure sensor and the third solenoid valve; an air conditioner heat exchanger disposed in the auxiliary air conditioner and connected to the ninth solenoid valve; an expansion valve connected to the air conditioner heat exchanger on one side and connected between the third solenoid valve and the external heat exchanger on the other side; and a sixth solenoid valve connected to the gas-liquid separator on one side and connected between the external heat exchanger and the expansion valve on the other side.

[0017] The integrated pneumatic system according to the present invention uses a vehicle-mounted thermostatic chamber to replace a conventional vehicle-mounted refrigerator, so as to provide heating and heat preservation at a higher temperature in addition to the refrigeration capacity, in order to cope with the situation where items need to be maintained at a relatively high temperature (such as 50°C) for a long time.

[0018] The integrated pneumatic system according to the present invention integrates multiple systems on the vehicle together and shares a compressor, which can effectively reduce costs and volume, and solve the problems of compressor noise and EMC. For example, the vehicle thermostatic chamber / refrigerator system and the vehicle air suspension system can be integrated into a VCU control, thus reducing the number of vehicle controllers.

[0019] In addition, when the vehicle air-conditioning performance is insufficient, the integrated pneumatic system can provide additional cooling or heating performance. The effective recovery of energy is also an important aspect. The carbon dioxide in the air suspension system contains the energy generated by the compression of the compressor, as well as the energy generated by the continuous pressurization of the air spring by the vehicle weight, and these energies can be recovered and utilized by the air-conditioning system. In cold weather, this system can be used as an auxiliary heat pump to improve the heating effect of the air-conditioning system in cold weather. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The foregoing and other aspects of the present invention will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings. It should be noted that the scales of the respective drawings may be different for the purpose of clear illustration, but this will not affect the understanding of the present invention.

[0021] Figure 1 is a schematic diagram of an integrated pneumatic system for a vehicle according to the present invention.

[0022] Figure 2 is a schematic diagram of a compression device of an integrated pneumatic system for a vehicle according to a first embodiment of the present invention.

[0023] Figure 3 is a schematic diagram of an integrated pneumatic system for a vehicle according to a second embodiment of the present invention.

[0024] Figure 4 is a schematic diagram of a compression device of an integrated pneumatic system for a vehicle according to a third embodiment of the present invention.

[0025] Figure 5 is a schematic diagram of a compression device of an integrated pneumatic system for a vehicle according to a fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be completely conveyed to those skilled in the art.

[0027] It should be noted that the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements.

[0028] Figure 1Schematic diagram of an integrated pneumatic system for a vehicle according to a first embodiment of the present invention. As Figure 1 shown, the integrated pneumatic system includes a compression device 100, a heat exchange device 200, an air suspension 300, a bypass pipe 400, a control unit 500, and a throttle valve 29 provided in the bypass pipe 400. Both the heat exchange device 200 and the air suspension 300 are connected to the compression device 100. The bypass pipe 400 is connected from the heat exchange device 200 to the air suspension 300, specifically connected between the low-pressure heat exchange medium pipeline 6 and the suspension input pipeline 12. The heat exchange device 200 uses carbon dioxide processed by the compression device 100 as a heat exchange medium. The air suspension 300 uses carbon dioxide processed by the compression device 100 as a working medium. The control unit 500 is electrically connected to the compression device 100, the heat exchange device 200, the air suspension 300, and the throttle valve 29 to control various solenoid valves in the compression device 100, the heat exchange device 200, and the air suspension 300.

[0029] Figure 2 Schematic diagram of a compression device of an integrated pneumatic system for a vehicle according to the present invention. As Figure 2 shown, the compression device 100 includes a cavity 44, a first exhaust valve 1, a second exhaust valve 2, a motor 3, an inverter 4, a low-pressure heat exchange medium pipeline 6, a low-pressure gas pipeline 7, a first solenoid valve 8, a second solenoid valve 9, a first check valve 10, a high-pressure heat exchange medium pipeline 11, and a suspension input pipeline 12. The first exhaust valve 1 and the second exhaust valve 2 are provided in the cavity 44. The motor 3 is connected to the cavity 44. The inverter 4 is electrically connected to the motor 3. The low-pressure heat exchange medium pipeline 6 is connected from the heat exchange device 200 to the cavity 44. The first solenoid valve 8 is provided in the low-pressure heat exchange medium pipeline 6. The low-pressure gas pipeline 7 is connected from the air suspension 300 to the first solenoid valve 8. The suspension input pipeline 12 is connected from the first exhaust valve 1 to the air suspension 300. The second solenoid valve 9 is provided in the suspension input pipeline 12. The first check valve 10 is provided in the low-pressure gas pipeline 7. The high-pressure heat exchange medium pipeline 11 is connected from the second exhaust valve 2 to the heat exchange device 200.

[0030] In the first embodiment, the heat exchange device 200 is a vehicle-mounted thermostat, and includes a first pressure sensor 13, a third solenoid valve 14, an external heat exchanger 15, a fan 16, an expansion valve 17, a fourth solenoid valve 18, a thermostat evaporator 21, a gas-liquid separator 22, a fifth solenoid valve 23, a thermostat heat exchanger 24, an expansion valve 25, and a sixth solenoid valve 26. The first pressure sensor 13 is disposed in the high-pressure heat exchange medium pipeline 11. The third solenoid valve 14 is connected to the high-pressure heat exchange medium pipeline 11. The external heat exchanger 15 is connected to the third solenoid valve 14. The fan 16 is disposed close to the external heat exchanger 15. The expansion valve 17 is connected to the external heat exchanger 15. The fourth solenoid valve 18 is connected to the expansion valve 17. The thermostat evaporator 21 is connected to the fourth solenoid valve 18. The gas-liquid separator 22 is connected to the thermostat evaporator 21 and the low-pressure heat exchange medium pipeline 6. The fifth solenoid valve 23 is connected to the high-pressure heat exchange medium pipeline 11 between the first pressure sensor 13 and the third solenoid valve 14. The thermostat heat exchanger 24 is connected to the fifth solenoid valve 23. The expansion valve 25 is connected to the thermostat heat exchanger 24 on one side and is connected between the third solenoid valve 14 and the external heat exchanger 15 on the other side. The sixth solenoid valve 26 is connected between the external heat exchanger 15 and the expansion valve 17 on one side and is connected to the gas-liquid separator 22 on the other side.

[0031] As Figure 1As shown, the air suspension 300 includes a plurality of suspension solenoid valves 33, 34, 35, 36, a seventh solenoid valve 30, a second pressure sensor 31, a first air storage tank 32, a plurality of suspension devices 37, 38, 39, 40, a second air storage tank 42, a second check valve 41, and a third pressure sensor 43. The seventh solenoid valve 30 is connected to the suspension input pipeline 12. The suspension gas pipeline 45 is connected to the seventh solenoid valve 30. The plurality of suspension solenoid valves 33, 34, 35, 36 are connected to the suspension gas pipeline 45. The second pressure sensor 31 is connected to the suspension gas pipeline 45 between the seventh solenoid valve 30 and the plurality of suspension solenoid valves 33, 34, 35, 36, and is configured to measure the pressure of the medium in the suspension gas pipeline 45. The first air storage tank 32 is connected to the suspension gas pipeline 45 between the second pressure sensor 31 and the plurality of suspension solenoid valves 33, 34, 35, 36. The second pressure sensor 31 is also configured to measure the pressure of the medium in the first air storage tank 32. The plurality of suspension devices 37, 38, 39, 40 are connected to the corresponding suspension solenoid valves among the plurality of suspension solenoid valves 33, 34, 35, 36 on one side, and are connected to the low-pressure gas pipeline 7 on the other side. The second air storage tank 42 is disposed in the low-pressure gas pipeline 7 between the first check valve 10 and the plurality of suspension devices 37, 38, 39, 40. The second check valve 41 is disposed in the low-pressure gas pipeline 7 between the second air storage tank 42 and the plurality of suspension devices 37, 38, 39, 40. The third pressure sensor 43 is connected to the low-pressure gas pipeline 7 between the first check valve 10 and the second air storage tank 42, and is configured to measure the pressure of the medium in the low-pressure gas pipeline 7 and the pressure of the medium in the second air storage tank 42.

[0032] The inverter 4 starts the motor 3 after receiving the operation signal from the control unit 5. The integrated pneumatic system for a vehicle according to the present invention uses carbon dioxide as the heat exchange medium. Carbon dioxide enters the cavity 44 via the low-pressure heat exchange medium pipeline 6 and the first solenoid valve 8, and is compressed by the motor 3 in the cavity 44. The compressed carbon dioxide is discharged into the high-pressure heat exchange medium pipeline 11 via the second exhaust valve 2. The integrated pneumatic system for a vehicle according to the present invention also uses carbon dioxide as the working medium. Carbon dioxide enters the cavity 44 via the low-pressure gas pipeline 7, the first check valve 10, and the first solenoid valve 8, and is compressed by the motor 3 in the cavity 44. When the second solenoid valve 9 is open, since the exhaust pressure of the second exhaust valve 2 is set to be much higher than the exhaust pressure of the first exhaust valve 1 (for example, the former is about 10 times the latter), the second exhaust valve 2 is equivalent to being closed. At this time, carbon dioxide will only be discharged from the first exhaust valve 1. The compressed carbon dioxide is discharged into the suspension gas pipeline 45 via the first exhaust valve 1.

[0033] When the in-vehicle thermostat refrigerates, carbon dioxide as the heat exchange medium is compressed by the motor 3 in the cavity 44, and then enters the external heat exchanger 15 successively via the second exhaust valve 2, the high-pressure heat exchange medium pipeline 11, the first pressure sensor 13 and the third solenoid valve 14. It is cooled by the fan 16 in the external heat exchanger 15, and then becomes a low-temperature and low-pressure heat exchange medium through the expansion valve 17. At this time, the fourth solenoid valve 18 is opened. The heat exchange medium enters the thermostat evaporator 21 for refrigeration (heat absorption), and then returns to the cavity 44 via the gas-liquid separator 22, the low-pressure heat exchange medium pipeline 6 and the first solenoid valve 8.

[0034] When the in-vehicle thermostat heats up, carbon dioxide as the heat exchange medium is compressed by the motor 3 in the cavity 44, and its temperature rises. It then successively passes through the second exhaust valve 2, the high-pressure heat exchange medium pipeline 11 and the first pressure sensor 13. At this time, the fifth solenoid valve 23 is opened. The heat exchange medium enters the thermostat heat exchanger 24 for heating (heat release), and then enters the external heat exchanger 15 through the expansion valve 25, where it is heated by the fan 16. The heated heat exchange medium returns to the cavity 44 via the sixth solenoid valve 26, the gas-liquid separator 22, the low-pressure heat exchange medium pipeline 6 and the first solenoid valve 8.

[0035] In the following text, the pressure of the medium in the air suspension 300 refers to the pressure of the medium in the suspension gas pipeline 45. When the air suspension 300 is operating, if the pressure of the medium in the air suspension 300 measured by the second pressure sensor 31 is insufficient (e.g., less than the threshold), the controller 500 controls the throttle valve 29 and the seventh solenoid valve 30 to open, so that the medium in the low-pressure heat exchange medium pipeline 6 (e.g., with a pressure of 30 bar) enters the air suspension 300 through the bypass pipeline, via the throttle valve 29 and the seventh solenoid valve 30, and then enters the first air storage tank 32 to increase the pressure of the medium in the air suspension 300. When the vehicle needs to lift the air suspension 300, multiple suspension solenoid valves 33, 34, 35, 36 can be opened separately according to the demand to control the inflation of one or more of the multiple suspension devices 37, 38, 39, 40. When the vehicle needs to lower the air suspension 300, one or more of the multiple suspension devices 37, 38, 39, 40 deflate. When one or more of the multiple suspension devices 37, 38, 39, 40 deflate, the medium is temporarily stored in the second air storage tank 42. It should be noted that to ensure the normal operation of the air suspension 300, the pressure of the medium in the first air storage tank 32 should always be greater than the pressure of the medium in the second air storage tank 42 (e.g., more than 5 bar higher). If the pressures measured by the second pressure sensor 31 and the third pressure sensor 43 are both too high (e.g., higher than the threshold), it means that there is too much medium in the air suspension 300. At this time, the controller 500 controls the second exhaust valve 2 to open, so that the excess medium in the air suspension 300 is compressed by the compression device 100 and then enters the heat exchange device 200. If the pressures measured by the second pressure sensor 31 and the third pressure sensor 43 are both too low (e.g., lower than the threshold), it means that there is too little medium in the air suspension 300. At this time, the controller 500 controls the first exhaust valve 1 to open, so that the medium from the heat exchange device 200 and the air suspension 300 is compressed in the compression device 100 and then returned to the air suspension 300.

[0036] Figure 3Schematic diagram of an integrated pneumatic system for a vehicle according to a second embodiment of the present invention. In the second embodiment, the heat exchange device 200 includes an auxiliary air conditioner and an on-vehicle incubator, and further includes a first pressure sensor 13, a third solenoid valve 14, an external heat exchanger 15, a fan 16, an expansion valve 17, a fourth solenoid valve 18, an eighth solenoid valve 19, an air conditioner evaporator 20, an incubator evaporator 21, a gas-liquid separator 22, a fifth solenoid valve 23, an incubator heat exchanger 24, an expansion valve 25, a sixth solenoid valve 26, a ninth solenoid valve 27, and an air conditioner heat exchanger 28. The first pressure sensor 13 is disposed in the high-pressure heat exchange medium pipeline 11. The third solenoid valve 14 is connected to the high-pressure heat exchange medium pipeline 11. The external heat exchanger 15 is connected to the third solenoid valve 14. The fan 16 is disposed adjacent to the external heat exchanger 15. The expansion valve 17 is connected to the external heat exchanger 15. The fourth solenoid valve 18 and the eighth solenoid valve 19 are connected in parallel and connected to the expansion valve 17. The air conditioner evaporator 20 is disposed in the auxiliary air conditioner and connected to the eighth solenoid valve 19. The incubator evaporator 21 is disposed in the on-vehicle incubator and connected to the fourth solenoid valve 18. The gas-liquid separator 22 is connected to the incubator evaporator 21 and the low-pressure heat exchange medium pipeline 6. The fifth solenoid valve 23 and the ninth solenoid valve 27 are connected in parallel and connected to the high-pressure heat exchange medium pipeline 11 between the first pressure sensor 13 and the third solenoid valve 14. The incubator heat exchanger 24 is disposed in the on-vehicle incubator and connected to the fifth solenoid valve 23. The air conditioner heat exchanger 28 is disposed in the auxiliary air conditioner and connected to the ninth solenoid valve 27. The expansion valve 25 is connected to the air conditioner heat exchanger 28 and the incubator heat exchanger 24 on one side and connected between the third solenoid valve 14 and the external heat exchanger 15 on the other side. The sixth solenoid valve 26 is connected between the external heat exchanger 15 and the expansion valve 17 on one side and connected to the gas-liquid separator 22 on the other side. The configurations of the compression device 100 and the air suspension 300 are the same as those in the first embodiment.

[0037] In the second embodiment, the refrigeration principle of the auxiliary air conditioner is basically the same as that of the vehicle-mounted thermostat in the first embodiment. The difference is that when the auxiliary air conditioner is refrigerating, the eighth solenoid valve 19 is opened. The heat exchange medium enters the air conditioner evaporator 20 through the eighth solenoid valve 19, is refrigerated (absorbs heat) in the air conditioner evaporator 20, and then returns to the cavity 44 through the gas-liquid separator 22, the low-pressure heat exchange medium pipeline 6 and the first solenoid valve 8. The heating principle of the auxiliary air conditioner is basically the same as that of the vehicle-mounted thermostat in the first embodiment. The difference is that when the auxiliary air conditioner is heating, the ninth solenoid valve 27 is opened, the heat exchange medium enters the air conditioner heat exchanger 28 through the ninth solenoid valve 27, is heated (releases heat) in the air conditioner heat exchanger 28, and then enters the external heat exchanger 15 through the expansion valve 25 and is heated by the fan 16 in the external heat exchanger 15. The heated heat exchange medium returns to the cavity 44 through the sixth solenoid valve 26, the gas-liquid separator 22, the low-pressure heat exchange medium pipeline 6 and the first solenoid valve 8. In the second embodiment, the vehicle-mounted thermostat, the auxiliary air conditioner and the air suspension 300 can work simultaneously or can be independently controlled.

[0038] It should be noted that in the integrated pneumatic system for vehicles according to the present invention, the priority of the air suspension 300 is higher than that of the heat exchange device 200, that is, the compression device 100 preferentially ensures that the pressure in the air suspension 300 is within the normal range.

[0039] Figure 4 It is a schematic diagram of the compression device of the integrated pneumatic system for vehicles according to the third embodiment of the present invention. In the third embodiment, the heat exchange device 200 is a vehicle-mounted refrigerator and includes a first pressure sensor 13, a third solenoid valve 14, an external heat exchanger 15, a fan 16, an expansion valve 17, a fourth solenoid valve 18, a thermostat evaporator 21 and a gas-liquid separator 22. The first pressure sensor 13 is arranged in the high-pressure heat exchange medium pipeline 11. The third solenoid valve 14 is connected to the high-pressure heat exchange medium pipeline 11. The external heat exchanger 15 is connected to the third solenoid valve 14. The fan 16 is arranged close to the external heat exchanger 15. The expansion valve 17 is connected to the external heat exchanger 15. The fourth solenoid valve 18 is connected to the expansion valve 17. The thermostat evaporator 21 is connected to the fourth solenoid valve 18. The gas-liquid separator 22 is connected to the thermostat evaporator 21 and the low-pressure heat exchange medium pipeline 6. The configurations of the compression device 100 and the air suspension 300 are the same as those in the first embodiment.

[0040] When the vehicle-mounted refrigerator is refrigerating, carbon dioxide, as the heat exchange medium, is compressed by the motor 3 in the cavity 44, and sequentially enters the external heat exchanger 15 through the second exhaust valve 2, the high-pressure heat exchange medium pipeline 11, the first pressure sensor 13, and the third solenoid valve 14. It is cooled by the fan 16 in the external heat exchanger 15, and then passes through the expansion valve 17 to become a low-temperature and low-pressure heat exchange medium. At this time, the fourth solenoid valve 18 is opened. The heat exchange medium enters the incubator evaporator 21 for refrigeration (heat absorption), and then returns to the cavity 44 through the gas-liquid separator 22, the low-pressure heat exchange medium pipeline 6, and the first solenoid valve 8.

[0041] Figure 5 It is a schematic diagram of a compression device of an integrated pneumatic system for a vehicle according to the fourth embodiment of the present invention. In the fourth embodiment, the heat exchange device 200 includes an auxiliary air conditioner and a vehicle-mounted refrigerator, and further includes a first pressure sensor 13, a third solenoid valve 14, an external heat exchanger 15, a fan 16, an expansion valve 17, a fourth solenoid valve 18, an eighth solenoid valve 19, an air conditioner evaporator 20, an incubator evaporator 21, a gas-liquid separator 22, an expansion valve 25, a sixth solenoid valve 26, a ninth solenoid valve 27, and an air conditioner heat exchanger 28. The first pressure sensor 13 is arranged in the high-pressure heat exchange medium pipeline 11. The third solenoid valve 14 is connected to the high-pressure heat exchange medium pipeline 11. The external heat exchanger 15 is connected to the third solenoid valve 14. The fan 16 is arranged close to the external heat exchanger 15. The expansion valve 17 is connected to the external heat exchanger 15. The fourth solenoid valve 18 and the eighth solenoid valve 19 are connected in parallel and connected to the expansion valve 17. The air conditioner evaporator 20 is arranged in the auxiliary air conditioner and is connected to the eighth solenoid valve 19. The incubator evaporator 21 is arranged in the vehicle-mounted incubator and is connected to the fourth solenoid valve 18. The gas-liquid separator 22 is connected to the incubator evaporator 21 and the low-pressure heat exchange medium pipeline 6. One side of the expansion valve 25 is connected to the air conditioner heat exchanger 28, and the other side is connected between the third solenoid valve 14 and the external heat exchanger 15. One side of the sixth solenoid valve 26 is connected between the external heat exchanger 15 and the expansion valve 17, and the other side is connected to the gas-liquid separator 22. The ninth solenoid valve 27 is connected to the high-pressure heat exchange medium pipeline 11 between the first pressure sensor 13 and the third solenoid valve 14. The air conditioner heat exchanger 28 is arranged in the auxiliary air conditioner and is connected to the ninth solenoid valve 27. The configurations of the compression device 100 and the air suspension 300 are the same as those in the second embodiment.

[0042] In the fourth embodiment, the refrigeration principle of the auxiliary air conditioner is basically the same as that of the vehicle-mounted thermostat in the third embodiment. The difference is that when the auxiliary air conditioner is refrigerating, the eighth solenoid valve 19 is opened. The heat exchange medium enters the air conditioner evaporator 20 through the eighth solenoid valve 19, undergoes refrigeration (absorbs heat) in the air conditioner evaporator 20, and then returns to the cavity 44 through the gas-liquid separator 22, the low-pressure heat exchange medium pipeline 6, and the first solenoid valve 8. The heating principle of the auxiliary air conditioner is basically the same as that of the vehicle-mounted refrigerator in the third embodiment. The difference is that when the auxiliary air conditioner is heating, the ninth solenoid valve 27 is opened, the heat exchange medium enters the air conditioner heat exchanger 28 through the ninth solenoid valve 27, undergoes heating (releases heat) in the air conditioner heat exchanger 28, and then enters the external heat exchanger 15 through the expansion valve 25 and is heated by the fan 16 in the external heat exchanger 15. The heated heat exchange medium returns to the cavity 44 through the sixth solenoid valve 26, the gas-liquid separator 22, the low-pressure heat exchange medium pipeline 6, and the first solenoid valve 8. In the fourth embodiment, the vehicle-mounted refrigerator, the auxiliary air conditioner, and the air suspension 300 can work simultaneously or can be independently controlled.

[0043] In summary, the vehicle-mounted thermostat / refrigerator and the auxiliary air conditioner can use carbon dioxide as the heat exchange medium, and the air suspension can also use carbon dioxide as the working medium. The difference between these two uses lies in the air pressure of carbon dioxide. Therefore, the integrated pneumatic system for vehicles according to the present invention solves the problem of different air pressures by means of a throttle valve. In addition, since the air pressure required by the vehicle-mounted thermostat / refrigerator is significantly higher than that of the air suspension and there is a sufficient air source, borrowing the heat exchange medium of the vehicle-mounted thermostat / refrigerator as the working medium can start the air suspension faster without waiting for the compressor to inflate the air suspension separately. Setting two exhaust valves with different exhaust pressures in the compression device can also ensure the respective pressures of the heat exchange device and the air suspension when using the medium separately. In addition, during the idle time of the air suspension and the vehicle-mounted refrigerator, the compression device can also supplement the heat exchange medium for the auxiliary air conditioner.

[0044] The foregoing description of the embodiments has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the embodiments to the variants described. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to best illustrate the principles and practical applications, so that those skilled in the art can understand the embodiments from various embodiments and various modifications suitable for their intended uses. Within the framework of the embodiments, the above components and features can be combined between different embodiments.

Claims

1. An integrated pneumatic system for a vehicle, comprising: a compression device (100); a heat exchange device (200) connected to the compression device (100); an air suspension (300) connected to the compression device (100); a control unit (500) electrically connected to the compression device (100), the heat exchange device (200) and the air suspension (300); wherein, the heat exchange device (200) uses the medium processed by the compression device (100) as a heat exchange medium; and the air suspension (300) uses the medium as a working medium.

2. The integrated pneumatic system for a vehicle according to claim 1, wherein, the integrated pneumatic system comprises: a bypass pipeline (400) connecting from the heat exchange device (200) to the air suspension (300); and a throttle valve (29) provided in the bypass pipeline (400) and electrically connected to the control unit (500).

3. The integrated pneumatic system for a vehicle according to claim 2, wherein, the compression device (100) comprises: a cavity (44); a first exhaust valve (1) and a second exhaust valve (2) provided in the cavity (44) and having different exhaust pressures, wherein the exhaust pressure of the second exhaust valve (2) is higher than that of the first exhaust valve (1); a motor (3) connected to the cavity (44); an inverter (4) electrically connected to the control unit (500) and the motor (3); a low-pressure heat exchange medium pipeline (6) connecting from the heat exchange device (200) to the cavity (44); a low-pressure gas pipeline (7) connecting from the air suspension (300) to a first solenoid valve (8); a high-pressure heat exchange medium pipeline (11) connecting from the second exhaust valve (2) to the heat exchange device (200); a suspension input pipeline (12) connecting from the first exhaust valve (1) to the air suspension (300); a first solenoid valve (8) provided in the low-pressure heat exchange medium pipeline (6); a second solenoid valve (9) provided in the suspension input pipeline (12); and a first check valve (10) provided in the low-pressure gas pipeline (7).

4. The integrated pneumatic system for a vehicle according to claim 3, wherein, the air suspension (300) comprises: a seventh solenoid valve (30) connected to the suspension input pipeline (12); a suspension gas pipeline (45) connected to the seventh solenoid valve (30); a plurality of suspension solenoid valves (33, 34, 35, 36) connected to the suspension gas pipeline (45); a second pressure sensor (31) connected to the suspension gas pipeline (45) between the seventh solenoid valve (30) and the plurality of suspension solenoid valves (33, 34, 35, 36); a first gas storage tank (32) connected to the suspension gas pipeline (45) between the second pressure sensor (31) and the plurality of suspension solenoid valves (33, 34, 35, 36); A plurality of suspension devices (37, 38, 39, 40), which are connected to corresponding suspension solenoid valves among the plurality of suspension solenoid valves (33, 34, 35, 36) on one side and to a low-pressure gas pipeline (7) on the other side; A second gas storage tank (42), which is arranged in the low-pressure gas pipeline (7) between a first one-way valve (10) and the plurality of suspension devices (37, 38, 39, 40); A second one-way valve (41), which is arranged in the low-pressure gas pipeline (7) between the second gas storage tank (42) and the plurality of suspension devices (37, 38, 39, 40); and A third pressure sensor (43), which is connected to the low-pressure gas pipeline (7) between the first one-way valve (10) and the second gas storage tank (42).

5. The integrated pneumatic system for a vehicle according to claim 4, wherein, The second pressure sensor (31) is configured to measure the pressure of the medium in the suspension gas pipeline (45) and the pressure of the medium in the first gas storage tank (32); And The third pressure sensor (43) is configured to measure the pressure of the medium connected to the low-pressure gas pipeline (7) and the pressure of the medium in the second gas storage tank (42).

6. The integrated pneumatic system for a vehicle according to claim 5, wherein, The control unit (500) is configured to control the compression device (100) according to the pressures measured by the second pressure sensor (31) and the third pressure sensor (43), such that the pressure of the medium in the first gas storage tank (32) is higher than the pressure of the medium in the second gas storage tank (42).

7. The integrated pneumatic system for a vehicle according to claim 6, wherein, The control unit (500) is configured to control the compression device (100), such that the pressure of the medium in the first gas storage tank (32) is higher than the pressure of the medium in the second gas storage tank (42) by at least 5 bar.

8. The integrated pneumatic system for a vehicle according to claim 5, wherein, The control unit (500) is configured to control the second exhaust valve (2) to open during the operation of the air suspension (300) when the pressures measured by the second pressure sensor (31) and the third pressure sensor (43) are higher than a threshold value, such that the excess medium in the air suspension (300) enters the heat exchange device (200) after being compressed by the compression device (100); And The control unit (500) is configured to control the first exhaust valve (1) to open during the operation of the air suspension (300) when the pressures measured by the second pressure sensor (31) and the third pressure sensor (43) are lower than a threshold value, such that the medium from the heat exchange device (200) and the air suspension (300) is compressed in the compression device (100) and then returned to the air suspension (300).

9. The integrated pneumatic system for a vehicle according to claim 3, wherein, The heat exchange device (200) is an on-vehicle thermostat and includes: A first pressure sensor (13), which is arranged in the high-pressure heat exchange medium pipeline (11); A third solenoid valve (14), which is connected to the high-pressure heat exchange medium pipeline (11); An external heat exchanger (15), which is connected to the third solenoid valve (14); A fan (16), which is arranged close to the external heat exchanger (15); An expansion valve (17), which is connected to the external heat exchanger (15); A fourth solenoid valve (18), which is connected to the expansion valve (17); An incubator evaporator (21), which is connected to the fourth solenoid valve (18); A gas-liquid separator (22), which is connected to the incubator evaporator (21) and the low-pressure heat exchange medium pipeline (6); A fifth solenoid valve (23), which is connected to the high-pressure heat exchange medium pipeline (11) between the first pressure sensor (13) and the third solenoid valve (14); An incubator heat exchanger (24), which is connected to the fifth solenoid valve (23); An expansion valve (25), which is connected to the incubator heat exchanger (24) on one side and is connected between the third solenoid valve (14) and the external heat exchanger (15) on the other side; and A sixth solenoid valve (26), which is connected between the external heat exchanger (15) and the expansion valve (17) on one side and is connected to the gas-liquid separator (22) on the other side.

10. The integrated pneumatic system for a vehicle according to claim 3, wherein The heat exchange device (200) includes an auxiliary air conditioner and an on-vehicle incubator, and further includes: A first pressure sensor (13), which is arranged in the high-pressure heat exchange medium pipeline (11); A third solenoid valve (14), which is connected to the high-pressure heat exchange medium pipeline (11); An external heat exchanger (15), which is connected to the third solenoid valve (14); A fan (16), which is arranged close to the external heat exchanger (15); An expansion valve (17), which is connected to the external heat exchanger (15); A fourth solenoid valve (18) and an eighth solenoid valve (19), which are in parallel and are connected to the expansion valve (17); An incubator evaporator (21), which is arranged in the on-vehicle incubator and is connected to the fourth solenoid valve (18); An air conditioner evaporator (20), which is arranged in the auxiliary air conditioner and is connected to the eighth solenoid valve (19); A gas-liquid separator (22), which is connected to the incubator evaporator (21) and the low-pressure heat exchange medium pipeline (6); A fifth solenoid valve (23) and a ninth solenoid valve (27), which are in parallel and are connected to the high-pressure heat exchange medium pipeline (11) between the first pressure sensor (13) and the third solenoid valve (14); An air conditioner heat exchanger (28), which is arranged in the auxiliary air conditioner and is connected to the ninth solenoid valve (27); An incubator heat exchanger (24), which is arranged in the on-vehicle incubator and is connected to the fifth solenoid valve (23); An expansion valve (25), which is connected to the air conditioner heat exchanger (28) and the incubator heat exchanger (24) on one side and is connected between the third solenoid valve (14) and the external heat exchanger (15) on the other side; and A sixth solenoid valve (26), which is connected between the external heat exchanger (15) and the expansion valve (17) on one side and is connected to the gas-liquid separator (22) on the other side.

11. The integrated pneumatic system for a vehicle according to claim 3, wherein The heat exchange device (200) is an on-vehicle refrigerator, and includes: A first pressure sensor (13) disposed in a high-pressure heat exchange medium pipeline (11); A third solenoid valve (14) connected to the high-pressure heat exchange medium pipeline (11); An external heat exchanger (15) connected to the third solenoid valve (14); A fan (16) disposed close to the external heat exchanger (15); An expansion valve (17) connected to the external heat exchanger (15); A fourth solenoid valve (18) connected to the expansion valve (17); An incubator evaporator (21) connected to the fourth solenoid valve (18); and A gas-liquid separator (22) connected to the incubator evaporator (21) and a low-pressure heat exchange medium pipeline (6).

12. The integrated pneumatic system for a vehicle according to claim 3, wherein the heat exchange device (200) includes an auxiliary air conditioner and an in-vehicle refrigerator, and further includes: A first pressure sensor (13) disposed in a high-pressure heat exchange medium pipeline (11); A third solenoid valve (14) connected to the high-pressure heat exchange medium pipeline (11); An external heat exchanger (15) connected to the third solenoid valve (14); A fan (16) disposed close to the external heat exchanger (15); An expansion valve (17) connected to the external heat exchanger (15); A fourth solenoid valve (18) and an eighth solenoid valve (19), which are in parallel and connected to the expansion valve (17); An incubator evaporator (21) disposed in an in-vehicle incubator and connected to the fourth solenoid valve (18); An air conditioner evaporator (20) disposed in the auxiliary air conditioner and connected to the eighth solenoid valve (19); A gas-liquid separator (22) connected to the incubator evaporator (21) and a low-pressure heat exchange medium pipeline (6); A ninth solenoid valve (27) connected to the high-pressure heat exchange medium pipeline (11) between the first pressure sensor (13) and the third solenoid valve (14); An air conditioner heat exchanger (28) disposed in the auxiliary air conditioner and connected to the ninth solenoid valve (27); An expansion valve (25) connected to the air conditioner heat exchanger (28) on one side and connected between the third solenoid valve (14) and the external heat exchanger (15) on the other side; and A sixth solenoid valve (26) connected to the gas-liquid separator (22) on one side and connected between the external heat exchanger (15) and the expansion valve (17) on the other side.

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