Air supply device, suspension air supply system and vehicle

Abstract

The utility model belongs to the technical field of vehicle suspensions, and relates to an air supply device, a suspension air supply system and a vehicle. The air supply device comprises a first air storage tank, a second air storage tank, a switch module and an air spring connecting end, one end of the switch module is connected with the first air storage tank and the second air storage tank, and the other end of the switch module is connected with the air spring connecting end; the switch module is used for controlling connection and disconnection between the first air storage tank and / or the second air storage tank and the air spring connecting end. The air supply device can reduce the requirement for space when the air storage tank is arranged on the vehicle.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle suspension, and in particular relates to an air supply device, a suspension air supply system and a vehicle. Background Art

[0002] Existing air suspension systems mostly use a single air tank to supply air to multiple air springs to achieve the lifting of each air spring.

[0003] However, since the air suspension system has only one air tank, in order to ensure effective air supply to multiple air springs, the air tank needs to have a larger volume. Accordingly, a larger air tank installation space needs to be reserved on the vehicle body, resulting in low space utilization of the vehicle body. Utility Model Content

[0004] The technical problem to be solved by the utility model is: to provide an air supply device, a suspension air supply system and a vehicle in view of the technical problem that the existing air suspension system makes the space utilization rate of the vehicle body low.

[0005] In order to solve the above technical problems, on the one hand, an embodiment of the utility model provides an air supply device, including a first air tank, a second air tank, a switch module and an air spring connecting end, one end of the switch module is connected to the first air tank and the second air tank, and the other end of the switch module is connected to the air spring connecting end; the switch module is used to control the on and off between the first air tank and / or the second air tank and the air spring connecting end.

[0006] According to the air supply device of the embodiment of the utility model, two air tanks (the first air tank and the second air tank) are provided at the same time, and the switch module is used to control the on-off between the first air tank and / or the second air tank and the air spring connection end, so that the air spring can be supplied with air through one of the two air tanks or through both air tanks at the same time, thereby realizing the rapid lifting of the air spring. When the air spring needs to be deflated after the lifting is completed, the gas in the air spring can enter one of the two air tanks, or enter both air tanks at the same time, thereby realizing the recovery of the gas. Since the air supply device is provided with two air tanks, the volume of a single air tank can be reduced, so that the space requirement for the air tank when arranged on the vehicle is reduced, thereby increasing the space utilization rate of the vehicle body.

[0007] Optionally, a plurality of air spring connection ends are provided, and the plurality of air spring connection ends are connected to the other end of the switch module.

[0008] Optionally, the air supply device further comprises an air compressor, an air inlet of the air compressor is used to connect external air or high-pressure gas, and an air outlet of the air compressor is connected to the first air storage tank and / or the second air storage tank.

[0009] Optionally, the air supply device further comprises an electric motor, and the electric motor is electrically connected to the air compressor.

[0010] Optionally, the gas supply device further comprises a gas dryer, the gas outlet of the air compressor is connected to the gas inlet of the gas dryer, and the gas outlet of the gas dryer is connected to the first gas storage tank and / or the second gas storage tank. The air passage of the gas dryer is connected between the gas outlet of the air compressor and the third pipeline.

[0011] Optionally, the air supply device further includes a first pipeline, and the other end of the switch module and the connecting end of the air spring are respectively connected to the first pipeline.

[0012] Optionally, the switch module includes a first valve and a second valve, the first valve is connected between the first gas storage tank and the first pipeline, and the first valve can connect the first gas storage tank and the first pipeline when it is opened;

[0013] The second valve is connected between the second gas storage tank and the first pipeline, and when the second valve is opened, the second gas storage tank can be connected to the first pipeline.

[0014] Optionally, the first valve and the second valve are integrated into one.

[0015] Optionally, the air supply device also includes a third pipeline, which is connected between the air outlet of the air compressor and the first pipeline. The second valve is connected between the second air storage tank and the third pipeline. When the second valve is opened, the second air storage tank can be connected to the third pipeline.

[0016] Optionally, a third valve is provided between the third pipeline and the first pipeline, and when the third valve is opened, the first pipeline can be connected to the third pipeline.

[0017] Optionally, the gas supply device further includes a fourth pipeline, the fourth pipeline is connected to the first pipeline, the first valve is connected between the first gas tank and the fourth pipeline, and the first valve can connect the first gas tank and the fourth pipeline when it is opened.

[0018] Optionally, a fourth valve is provided between the fourth pipeline and the first pipeline, and when the fourth valve is opened, the first pipeline can be connected to the fourth pipeline.

[0019] Optionally, the air supply device further includes a first air inlet end and / or a second air inlet end, the air inlet of the air compressor is connected to the first air inlet end; the second air inlet end is connected to the air inlet of the air compressor and the first air storage tank;

[0020] The first air inlet end is used for externally connecting air, and the second air inlet end is used for externally connecting high-pressure gas.

[0021] Optionally, the first air inlet end includes an air filter and a first one-way valve, the air inlet of the air filter is used to connect external air, the air inlet of the first one-way valve is connected to the air outlet of the air filter, and the air outlet of the first one-way valve is connected to the air inlet of the air compressor.

[0022] Optionally, the second air inlet end includes a second one-way valve, the air inlet of the second one-way valve is used to connect to external high-pressure gas, and the air outlet of the second one-way valve is connected to the air inlet of the air compressor and the first air storage tank.

[0023] Optionally, the air supply device further includes a second pipeline, and the second pipeline is connected between the air outlet of the first one-way valve and the air inlet of the air compressor.

[0024] Optionally, the gas supply device further includes a fifth pipeline, a gas outlet and a sixth valve, and the fifth pipeline is connected between the fourth pipeline and the second pipeline;

[0025] A fifth valve is provided between the fifth pipeline and the fourth pipeline, and when the fifth valve is opened, the fourth pipeline can be connected to the fifth pipeline;

[0026] The sixth valve is connected between the gas outlet and the third pipeline, and when the sixth valve is opened, the gas outlet is connected to the third pipeline;

[0027] The gas outlet is used for discharging the gas in the gas supply device.

[0028] Optionally, the air supply device further includes a seventh valve, wherein the seventh valve is connected between the air spring connection end and the first pipeline, and when the seventh valve is opened, the air spring connection end can be connected to the first pipeline.

[0029] Optionally, the gas supply device further includes a pressure sensor, and the pressure sensor is used to detect the pressure in the first pipeline.

[0030] On the other hand, an embodiment of the utility model provides a suspension air supply system, which includes the above-mentioned air supply device.

[0031] On the other hand, an embodiment of the utility model provides a vehicle, which includes the above-mentioned air supply device or the above-mentioned suspension air supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of an air supply device provided in one embodiment of the utility model.

[0033] The reference numerals in the specification are as follows:

[0034] 1. First air storage tank; 2. Second air storage tank; 3. Air spring connection end; 4. First pipeline; 5. First valve; 6. Second valve; 7. Electric motor; 8. Air compressor; 9. Second pipeline; 10. Third pipeline; 11. Air filter; 12. First non-return valve; 13. Gas dryer; 14. Fourth pipeline; 15. Third valve; 16. Fourth valve; 17. Fifth pipeline; 18. Fifth valve; 19. Second non-return valve; 20. Air outlet; 21. Sixth valve; 22. Pressure sensor; 23. Seventh valve. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0036] like Figure 1 As shown, the air supply device provided by the embodiment of the utility model comprises a first air tank 1, a second air tank 2, an air spring connection end 3 and a switch module, one end of the switch module is connected to the first air tank 1 and the second air tank 2, and the other end of the switch module is connected to the air spring connection end 3. The switch module is used to control the connection between the first air tank 1 and / or the second air tank 2 and the air spring connection end 3.

[0037] When the first air storage tank 1 and / or the second air storage tank 2 are connected to the air spring connecting end 3 , the first air storage tank 1 and the second air storage tank 2 can supply air to the air spring connecting end 3 and can also recover the gas in the air spring connecting end 3 .

[0038] The air supply device provided in the embodiment of the utility model is provided with two air tanks (the first air tank 1 and the second air tank 2) at the same time, and the switch module is used to control the on-off between the first air tank 1 and / or the second air tank 2 and the air spring connection end 3, so that when the gas capacity in a single air tank is sufficient, the air spring at the air spring connection end 3 can be supplied with air through one of the two air tanks, and when the gas capacity in the two air tanks is small, the air spring can be supplied with air through the two air tanks at the same time, so as to realize the rapid lifting of the air spring. When the air spring needs to be deflated after the lifting is completed, the gas in the air spring can enter one of the two air tanks, or enter both air tanks at the same time, so as to realize the recovery of the gas. Since the air supply device is provided with two air tanks, the volume of a single air tank can be reduced, so that the space requirement for the arrangement of the air tank on the vehicle is reduced, and the space utilization rate of the vehicle body is increased.

[0039] In one embodiment, if Figure 1 As shown, the air supply device also includes a first pipeline 4, and the other end of the switch module and the air spring connecting end 3 are respectively connected to the first pipeline 4, so that the first gas storage tank 1 and the second gas storage tank 2 can supply gas to the air spring connecting end 3 through the first pipeline 4, and can also recover the gas in the air spring connecting end 3 through the first pipeline 4.

[0040] In one embodiment, if Figure 1 As shown, the switch module is integrated with a first valve 5 and a second valve 6. The first valve 5 is arranged between the first gas tank 1 and the first pipeline 4. When the first valve 5 is opened, the first gas tank 1 can be connected to the first pipeline 4. The second valve 6 is arranged between the second gas tank 2 and the first pipeline 4. When the second valve 6 is opened, the second gas tank 2 can be connected to the first pipeline 4, and the air spring connection end 3 is connected to the first pipeline 4.

[0041] In other embodiments not shown in the figures, the first valve and the second valve may also be provided separately.

[0042] In one embodiment, if Figure 1 As shown, the air supply device further includes a first air inlet end, a motor 7, an air compressor 8, a second pipeline 9, and a third pipeline 10. The motor 7 is electrically connected to the air compressor 8. The second pipeline 9 is connected between the air inlet of the air compressor 8 and the first air inlet end. The third pipeline 10 is connected between the air outlet of the air compressor 8 and the first pipeline 4. The second air storage tank 2 is connected to the third pipeline 10 via the second valve 6. The first air inlet end is used to connect to external air.

[0043] The motor 7 drives the air compressor 8 to open, so that the air entering the air supply device from the first air inlet end can be compressed by the air compressor 8, and the compressed high-pressure gas can enter the first pipeline 4 through the third pipeline 10, and can enter the second air storage tank 2 and / or the air spring. It can be understood that if the high-pressure gas can enter the second air storage tank 2, the second valve 6 needs to be opened.

[0044] In one embodiment, if Figure 1 As shown, the first air inlet end includes an air filter 11 and a first one-way valve 12, the air inlet of the air filter 11 is used to connect external air, the air inlet of the first one-way valve 12 is connected to the air outlet of the air filter 11, and the air outlet of the first one-way valve 12 is connected to the second pipeline 9 to ensure that the air entering from the air filter 11 can be unidirectionally transported to the air compressor 8 for compression.

[0045] In one embodiment, if Figure 1 As shown, the gas supply device also includes a gas dryer 13, the gas outlet of the air compressor 8 is connected to the gas inlet of the gas dryer 13, and the gas outlet of the gas dryer 13 is connected to the first gas storage tank 1 and / or the second gas storage tank 2. Specifically, the air passage of the gas dryer 13 is connected between the gas outlet of the air compressor 8 and the third pipeline 10 to dry the high-pressure gas compressed by the air compressor 8 and remove moisture in the high-pressure gas.

[0046] In one embodiment, if Figure 1 As shown, the gas supply device also includes a fourth pipeline 14, which is connected to the first pipeline 4, and the first valve 5 is arranged between the first gas storage tank 1 and the fourth pipeline 14. When the first valve 5 is opened, the first gas storage tank 1 can be connected to the fourth pipeline 14, and then through the connection between the fourth pipeline 14 and the first pipeline 4, the first gas storage tank 1 can be connected to the first pipeline 4.

[0047] In one embodiment, if Figure 1 As shown, a third valve 15 is provided between the third pipeline 10 and the first pipeline 4 to control the communication state between the third pipeline 10 and the first pipeline 4. It can be understood that when the third valve 15 is opened, the third pipeline 10 is connected to the first pipeline 4; when the third valve 15 is closed, the third pipeline 10 is disconnected from the first pipeline 4.

[0048] A fourth valve 16 is provided between the fourth pipeline 14 and the first pipeline 4 to control the communication state between the fourth pipeline 14 and the first pipeline 4. It can be understood that when the fourth valve 16 is opened, the fourth pipeline 14 is connected to the first pipeline 4; when the fourth valve 16 is closed, the fourth pipeline 14 is disconnected from the first pipeline 4.

[0049] In one embodiment, if Figure 1 As shown, the air supply device also includes a fifth pipeline 17, and the fifth pipeline 17 is connected between the fourth pipeline 14 and the second pipeline 9, so that the high-pressure gas in the fourth pipeline 14 can enter the second pipeline 9 and then enter the air compressor 8 for secondary compression.

[0050] In one embodiment, if Figure 1 As shown, a fifth valve 18 is provided between the fifth pipeline 17 and the fourth pipeline 14 to control the communication state between the fifth pipeline 17 and the fourth pipeline 14. It can be understood that when the fifth valve 18 is opened, the fifth pipeline 17 is connected to the fourth pipeline 14; when the fifth valve 18 is closed, the fifth pipeline 17 is disconnected from the fourth pipeline 14.

[0051] In one embodiment, if Figure 1 As shown, the air supply device further includes a second air inlet end, which is connected to the air inlet of the air compressor 8 and the first air storage tank 1. Specifically, the second air inlet end can be connected to the fourth pipeline 14. The second air inlet end is used to connect high-pressure gas.

[0052] Furthermore, the second air inlet end includes a second one-way valve 19, the air inlet of the second one-way valve 19 is used to connect to external high-pressure gas, and the air outlet of the second one-way valve 19 is connected to the fourth pipeline 14, so that the high-pressure gas can enter the fourth pipeline 14 in one direction through the second one-way valve 19 for gas supply.

[0053] In one embodiment, if Figure 1 As shown, the gas supply device further includes a gas outlet 20 and a sixth valve 21, wherein the sixth valve 21 is disposed between the gas outlet 20 and the third pipeline 10, and the sixth valve 21 can control the connection state between the gas outlet 20 and the third pipeline 10. It can be understood that when the sixth valve 21 is opened, the gas outlet 20 is connected to the third pipeline 10, so that the gas in the third pipeline 10 can be discharged through the gas outlet 20; when the sixth valve 21 is closed, the gas outlet 20 is disconnected from the third pipeline 10.

[0054] In one embodiment, if Figure 1As shown, the gas supply device further includes a pressure sensor 22 , and the pressure sensor 22 is used to detect the pressure in the first pipeline 4 in real time.

[0055] In one embodiment, if Figure 1 As shown, the air supply device also includes a seventh valve 23, which is arranged between the air spring connecting end 3 and the first pipeline 4. When the seventh valve 23 is opened, the air spring connecting end 3 can be connected to the first pipeline 4, so that high-pressure gas can enter the air spring through the first pipeline 4.

[0056] In one embodiment, if Figure 1 As shown, the air spring connection ends 3 are provided in plurality, the seventh valves 23 are provided in plurality, and the plurality of air spring connection ends 3 and the plurality of seventh valves 23 are provided in one-to-one correspondence.

[0057] In one embodiment, the first valve 5 , the second valve 6 , the third valve 15 , the fourth valve 16 , the fifth valve 18 , the sixth valve 21 and the seventh valve 23 are all solenoid valves.

[0058] The working principle of the air supply device provided by the embodiment of the utility model is as follows:

[0059] (1) During the process of external gas inflating the first gas storage tank 1 through the air compressor 8, the air filter 11 and the first one-way valve 12 are opened, and the external gas enters the air compressor 8 through the second pipeline 9. The third valve 15, the fourth valve 16 and the first valve 5 are opened, so that the high-pressure gas output by the air compressor 8 enters the first gas storage tank 1 along the third pipeline 10 and the fourth pipeline 14. The pressure sensor 7 detects the real-time pressure. After the gas storage is completed, the valves are closed. It should be noted that during this process, the second valve 6 can also be opened at the same time to allow the high-pressure gas to enter the second gas storage tank 2.

[0060] (2) The high-pressure gas in the first air tank 1 is used to directly inflate the air spring at the air spring connection end 3 to achieve lifting. During this process, the fourth valve 16, the first valve 5 and the seventh valves 23 are opened, so that the high-pressure gas in the first air tank 1 enters into each air spring along the fourth pipeline 14 and the first pipeline 4 to complete the vehicle lifting. It should be noted that during this process, the second valve 6 can also be opened at the same time, so that the high-pressure gas in the second air tank 2 can inflate the air spring to achieve lifting. In addition, during this process, the compressed gas in the first air tank 1 and the second air tank 2 will not enter the air compressor 8 or the gas dryer 13.

[0061] (3) The external gas directly inflates the air spring through the air compressor 8 to complete the vehicle lifting. During this process, the air filter 11 and the first one-way valve 12 are opened, and the external gas enters the air compressor 8 through the second pipeline 9. The third valve 15 and each seventh valve 23 are opened, so that the high-pressure gas output by the air compressor 8 enters each air spring along the third pipeline 10, the first pipeline 4 and the air spring connection end 3 to complete the vehicle lifting.

[0062] (4) External high-pressure gas inflates each gas tank. The second one-way valve 19, the first valve 5 and the fourth valve 16 are opened, and the first gas tank 1 is filled with gas to the set pressure through real-time detection by the pressure sensor 7. After that, the first valve 5 is closed, and the seventh valves 23 are opened synchronously. After the air spring is lifted, the seventh valves 23 are closed, and the second valve 6 and the third valve 15 are opened to complete the gas storage in the second gas tank 2.

[0063] (5) Direct deflation of the air spring. In this process, the seventh valves 23 are opened respectively, and the fourth valve 16, the fifth valve 18 and the sixth valve 21 are opened synchronously, so that the exhaust is completed from the air outlet 20. It should be noted that the third valve 15 remains closed during the process, so that the high-pressure gas can all flow through the drying box 5, so that the drying box 5 can take out the moisture in the high-pressure gas.

[0064] (6) The air spring is exhausted and pressurized, that is, the high-pressure gas in the air spring enters the air storage tank again after being pressurized, so as to directly supply gas during the next operation. In this process, the fourth valve 16 and the fifth valve 18 are opened, the seventh valves 23 are opened synchronously, and the second valve 6 is opened, so that the depressurized gas of the air spring enters the second air storage tank 2 through the seventh valve 23, the fourth valve, the fifth valve 18 and the second valve 6 in sequence, completing the pressurized storage of the residual pressure gas of the air spring.

[0065] (7) The exhaust gas of the air spring is directly recovered and stored in the air tank. The internal pressure of the air spring and the pressure of each air tank are read by the pressure sensor 22. When the pressure value of the air spring is greater than the pressure of a certain air tank, the corresponding valve is directly opened to store the high-pressure gas in a lower-pressure air tank.

[0066] (8) Reading the system pressure: Open the valve to connect the gas path so that the pressure sensor 22 can obtain the corresponding pressure.

[0067] (9) The residual pressure gas in the first air tank 1 is pressurized and lifted quickly. The residual pressure gas remaining in the first air tank 1 after lifting passes through the fourth valve 16 and the fifth valve 18 to the air compressor 8 for further pressurization, and then the air spring is lifted, shortening the external air source pressurization time. It should be noted that during this process, the second valve 6 is closed and the second air tank 2 is disconnected.

[0068] (10) The first air storage tank 1 is pressurized to store the residual pressure. The first valve 5, the fourth valve 16 and the seventh valve 23 are opened. The first air storage tank 1 first supplies air to the air spring to complete the lifting. After the lifting, the fifth valve 18 is opened. The residual pressure gas can be pressurized by the air compressor 8 and then stored in the second air storage tank 2, so as to realize the utilization of the residual pressure gas and complete energy recovery.

[0069] The air supply device provided by the embodiment of the utility model has the following advantages:

[0070] (1) Since the air supply device provided in the embodiment of the utility model reduces the process of direct pressurization of the external air source, it can reduce the adverse effects caused by the accumulation of external air in the system. At the same time, it can improve the reliability of the rectification system and the response speed of the system lifting, shorten the use time of the air compressor 8, extend the life cycle of the overall system, and reduce the use cost.

[0071] (2) The air supply device provided in the embodiment of the utility model not only realizes the recompression of the low-pressure gas in the air tank and completes the rapid response pressurization of the air spring at the air spring connection end 3, but also realizes the recycling of the residual energy of the high-pressure gas in the air spring and the recycling of the low-pressure gas in the system, thereby achieving the effect of reducing energy consumption and reducing noise.

[0072] (3) Two gas tanks can reduce the volume of a single gas tank, thereby reducing the space required for arranging the gas tanks on the vehicle and increasing the space utilization of the vehicle body.

[0073] The suspension air supply system provided by the embodiment of the utility model comprises the air supply device provided by the above embodiment.

[0074] The vehicle provided in the embodiment of the utility model comprises the air supply device provided in the above embodiment or the suspension air supply system provided in the above embodiment.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas supply device, characterized in that: The invention comprises a first gas storage tank (1), a second gas storage tank (2), a switch module and an air spring connection end (3); one end of the switch module is connected to the first gas storage tank (1) and the second gas storage tank (2), and the other end of the switch module is connected to the air spring connection end (3); the switch module is used to control the connection between the first gas storage tank (1) and / or the second gas storage tank (2) and the air spring connection end (3).

2. The air supply device according to claim 1, characterized in that: A plurality of the air spring connection ends (3) are provided, and the plurality of the air spring connection ends (3) are connected to the other end of the switch module.

3. The gas supply device according to claim 1, characterized in that: The air supply device further comprises an air compressor (8), the air inlet of the air compressor (8) being used for externally connecting air or high-pressure gas, and the air outlet of the air compressor (8) being connected to the first air storage tank (1) and / or the second air storage tank (2).

4. The air supply device according to claim 3, characterized in that: The air supply device also includes an electric motor (7), and the electric motor (7) is electrically connected to the air compressor (8).

5. The air supply device according to claim 3, characterized in that: The gas supply device further comprises a gas dryer (13), the gas outlet of the air compressor (8) is connected to the gas inlet of the gas dryer (13), and the gas outlet of the gas dryer (13) is connected to the first gas storage tank (1) and / or the second gas storage tank (2).

6. The gas supply device according to claim 3, characterized in that: The air supply device also includes a first pipeline (4), and the other end of the switch module and the air spring connection end (3) are respectively connected to the first pipeline (4).

7. The air supply device according to claim 6, characterized in that: The switch module comprises a first valve (5) and a second valve (6); the first valve (5) is connected between the first gas storage tank (1) and the first pipeline (4); when the first valve (5) is opened, the first gas storage tank (1) and the first pipeline (4) can be connected; The second valve (6) is connected between the second gas storage tank (2) and the first pipeline (4), and when the second valve (6) is opened, the second gas storage tank (2) and the first pipeline (4) can be connected.

8. The air supply device according to claim 7, characterized in that: The first valve (5) and the second valve (6) are integrated into one body.

9. The air supply device according to claim 7, characterized in that: The air supply device further comprises a third pipeline (10), wherein the third pipeline (10) is connected between the air outlet of the air compressor (8) and the first pipeline (4), and the second valve (6) is connected between the second air storage tank (2) and the third pipeline (10), and when the second valve (6) is opened, the second air storage tank (2) and the third pipeline (10) can be connected.

10. The air supply device according to claim 9, characterized in that: A third valve (15) is provided between the third pipeline (10) and the first pipeline (4); when the third valve (15) is opened, the first pipeline (4) and the third pipeline (10) can be connected.

11. The air supply device according to claim 9, characterized in that: The gas supply device further comprises a fourth pipeline (14), the fourth pipeline (14) being in communication with the first pipeline (4), the first valve (5) being connected between the first gas storage tank (1) and the fourth pipeline (14), and the first valve (5) being able to connect the first gas storage tank (1) with the fourth pipeline (14) when the first valve (5) is opened.

12. The air supply device according to claim 11, characterized in that: A fourth valve (16) is provided between the fourth pipeline (14) and the first pipeline (4); when the fourth valve (16) is opened, the first pipeline (4) and the fourth pipeline (14) can be connected.

13. The air supply device according to claim 11, characterized in that: The air supply device further comprises a first air inlet end and / or a second air inlet end, the air inlet of the air compressor (8) being connected to the first air inlet end; the second air inlet end being connected to the air inlet of the air compressor (8) and the first air storage tank (1); the first air inlet end being used for external air connection, and the second air inlet end being used for external high-pressure gas connection.

14. The air supply device according to claim 13, characterized in that: The first air inlet end comprises an air filter (11) and a first one-way valve (12); the air inlet of the air filter (11) is used to connect external air; the air inlet of the first one-way valve (12) is connected to the air outlet of the air filter (11); and the air outlet of the first one-way valve (12) is connected to the air inlet of the air compressor (8).

15. The air supply device according to claim 13, characterized in that: The second air inlet end comprises a second one-way valve (19), the air inlet of the second one-way valve (19) is used to connect external high-pressure gas, and the air outlet of the second one-way valve (19) is connected to the air inlet of the air compressor (8) and the first air storage tank (1).

16. The air supply device according to claim 14, characterized in that: The air supply device further comprises a second pipeline (9), wherein the second pipeline (9) is connected between the air outlet of the first one-way valve (12) and the air inlet of the air compressor (8).

17. The air supply device according to claim 16, characterized in that: The gas supply device further comprises a fifth pipeline (17), a gas outlet (20) and a sixth valve (21), wherein the fifth pipeline (17) is connected between the fourth pipeline (14) and the second pipeline (9); A fifth valve (18) is provided between the fifth pipeline (17) and the fourth pipeline (14), and when the fifth valve (18) is opened, the fourth pipeline (14) and the fifth pipeline (17) can be connected. The sixth valve (21) is connected between the gas outlet end (20) and the third pipeline (10), and when the sixth valve (21) is opened, the gas outlet end (20) and the third pipeline (10) can be connected; The gas outlet end (20) is used for discharging the gas in the gas supply device.

18. The air supply device according to claim 6, characterized in that: The air supply device further comprises a seventh valve (23), wherein the seventh valve (23) is connected between the air spring connection end (3) and the first pipeline (4), and when the seventh valve (23) is opened, the air spring connection end (3) and the first pipeline (4) can be connected.

19. The air supply device according to claim 6, characterized in that: The gas supply device further comprises a pressure sensor (22), wherein the pressure sensor (22) is used to detect the pressure in the first pipeline (4).

20. A suspension air supply system, characterized in that: It comprises an air suspension and the air supply device according to any one of claims 1-19.

21. A vehicle, characterized in that: It comprises the air supply device according to any one of claims 1 to 19 or the suspension air supply system according to claim 20.

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