Compressed air supply device for air suspension system

Abstract

The utility model relates to the technical field of vehicles, and provides a compressed air supply device for an air suspension system. The compressed air supply device for the air suspension system comprises a compressor, a first pipeline and a first valve. The compressor comprises a first-stage compression mechanism and a second-stage compression mechanism; an air inlet of the first-stage compression mechanism is communicated with an air outlet of the air storage tank, and an air outlet of the first-stage compression mechanism is communicated between an air outlet of the second-stage compression mechanism and an air inlet of the air spring; an air outlet of the second-stage compression mechanism is communicated with an air inlet of the air spring; one end of the first pipeline is communicated with an air outlet of the first-stage compression mechanism, and the other end of the first pipeline is communicated with an air inlet of the second-stage compression mechanism; the first valve is arranged on the first pipeline and can be closed when the air storage tank is in an air outlet state. Compared with the prior art, the suspension height of the vehicle is increased quickly; the technical problem that in the prior art, the vehicle suspension height is increased slowly is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a compressed air supply device for an air suspension system and a vehicle. Background Art

[0002] Gas suspension system usually refers to a suspension method that uses air springs as spring elements in the suspension system of a car. The gas suspension system can adjust the suspension height and hardness of the vehicle to provide a more comfortable ride and better handling performance.

[0003] The gas suspension system of the prior art may include an air spring, a compressor and an air tank. The compressor is usually a multi-stage compression mechanism, for example, a two-stage compression mechanism, which includes a first-stage compression mechanism and a second-stage compression mechanism connected in series. The first-stage compression mechanism is responsible for initial compression, and the second-stage compression mechanism performs secondary compression on the basis of the first-stage compression mechanism. That is, the task of the first-stage compression mechanism is to compress the gas to an intermediate pressure, and then transfer the gas of the intermediate pressure to the second-stage compression mechanism, which further compresses the gas to the required pressure; the air tank is used to store the gas compressed by the compressor. When the suspension height of the vehicle needs to be quickly increased, the stored gas in the air tank will be released, and after release, it will be compressed by the second-stage compression mechanism of the compressor, and then enter the air spring after compression, causing the air spring to expand, thereby quickly increasing the suspension height of the vehicle.

[0004] However, since the gas stored in the gas tank has been compressed by the compressor and has a relatively high pressure, when the vehicle's suspension height needs to be quickly increased, if the gas stored in the gas tank is still compressed by the second-stage compression mechanism to increase the pressure, the second-stage compression mechanism's compression chamber (or second-stage compression chamber) will cause the second-stage compression mechanism to affect the speed at which the gas enters the air spring, thereby causing the vehicle's suspension height to increase more slowly. Summary of the invention

[0005] The invention provides a compressed air supply device for an air suspension system, which is used to solve the technical problem of slow increase in vehicle suspension height in the prior art.

[0006] The present invention provides a compressed air supply device for an air suspension system, comprising a compressor, a first pipeline and a first valve; the compressor comprises a first-stage compression mechanism and a second-stage compression mechanism; the air inlet of the first-stage compression mechanism is connected to the air outlet of an air storage tank, and the air outlet of the first-stage compression mechanism is connected between the air outlet of the second-stage compression mechanism and the air inlet of an air spring; the air outlet of the second-stage compression mechanism is connected to the air inlet of the air spring; one end of the first pipeline is connected to the air outlet of the first-stage compression mechanism, and the other end of the first pipeline is connected to the air inlet of the second-stage compression mechanism; the first valve is arranged on the first pipeline, and the first valve can be closed when the air storage tank is in the air outlet state.

[0007] According to one embodiment of the present invention, the first-stage compression mechanism has a first air inlet and a second air inlet; the second air inlet is connected to the atmosphere; the compressed air supply device for the air suspension system also includes a second pipeline and a second valve; one end of the second pipeline is connected to the air outlet of the air tank, and the other end of the second pipeline is connected to the first air inlet; the second valve is arranged in the second pipeline; in the first state, the first valve is closed and the second valve is opened; in the second state, the first valve is opened and the second valve is closed.

[0008] According to one embodiment of the present invention, a third pipeline is further included, and the air outlet of the first-stage compression mechanism is connected between the air outlet of the second-stage compression mechanism and the air inlet of the air spring through the third pipeline.

[0009] According to one embodiment of the present invention, the third valve is further included, which is arranged in the third pipeline; in the first state, the first valve is closed, and the second valve and the third valve are opened.

[0010] According to one embodiment of the present invention, the third valve is a one-way valve, which can connect the air outlet of the first-stage compression mechanism to the air inlet of the air spring.

[0011] According to one embodiment of the present invention, it also includes a gas drying unit, which has a drying chamber containing a moisture adsorbent, a drying chamber inlet and a drying chamber outlet; the drying chamber inlet is connected to the drying chamber outlet through the drying chamber; the compressed air supply device for the air suspension system also includes a fourth pipeline, one end of the fourth pipeline is connected to the air outlet of the second-stage compression mechanism, and the other end of the fourth pipeline is connected to the air inlet of the air spring; the other end of the third pipeline is connected to the fourth pipeline; the gas drying unit is arranged in the fourth pipeline and is located between the air outlet of the second-stage compression mechanism and the air spring.

[0012] According to one embodiment of the present invention, it also includes a multi-way pipe fitting, which has an inlet end, a first outlet end and a second outlet end; the other end of the fourth pipeline is connected to the inlet end of the multi-way pipe fitting; the first outlet end is connected to the air inlet of the air spring; and the second outlet end is connected to the air inlet of the air tank.

[0013] According to one embodiment of the present invention, it also includes a fourth valve and a fifth valve; the fourth valve is arranged between the first outlet end and the air inlet of the air spring; the fifth valve is arranged between the second outlet end and the air inlet of the air tank; in the first state, the first valve and the fifth valve are closed, and the second valve, the third valve and the fourth valve are opened; in the second state, the first valve and the fifth valve are opened, and the second valve, the third valve and the fourth valve are closed.

[0014] According to one embodiment of the present invention, it also includes a pressure sensor and a controller; the pressure sensor is arranged on the air spring to detect the air pressure in the air spring; the controller is electrically connected to the pressure sensor, the second valve, the fourth valve and the fifth valve.

[0015] The characteristics and advantages of the compressed air supply device for the air suspension system of the present invention are:

[0016] When the gas tank is in the gas outlet state, that is, when the suspension height of the vehicle needs to be quickly increased, the gas in the gas tank will flow into the first-stage compression mechanism. After the gas flows into the first-stage compression mechanism, the gas will be compressed, and the compressed gas will be divided into two paths, the first path and the second path. The first path flows toward the second-stage compression mechanism, and the second path flows toward the air spring. Since the first valve is closed when the gas tank is in the gas outlet state, the first path is interrupted and not conducted, and the gas can only flow to the air spring from the second path; since the gas stored in the gas tank only passes through the first-stage compression mechanism and does not pass through the second-stage compression mechanism, and the first-stage compression mechanism The volume of the first-stage compression chamber of the compression mechanism is larger than the volume of the second-stage compression chamber of the second-stage compression mechanism. Therefore, every time the motor rotates one circle, the volume of the gas in the air tank compressed by the first-stage compression chamber is larger than the volume of the gas in the air tank compressed by the second-stage compression chamber. That is, the speed of using the first-stage compression chamber to compress the gas in the air tank to inflate the air spring is faster than the speed of using the second-stage compression chamber to compress the gas in the air tank to inflate the air spring. Compared with the prior art, the speed at which the gas enters the air spring is faster. Therefore, the vehicle suspension height is increased faster. This solves the technical problem of the slow increase in the vehicle suspension height in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of an embodiment of a compressed air supply device for an air suspension system according to the present invention.

[0019] Figure 21 is a schematic diagram of another embodiment of a compressed air supply device for an air suspension system according to the present invention in a first state.

[0020] Figure 3 Schematic diagram of another embodiment of the compressed air supply device for an air suspension system according to the present invention in a second state.

[0021] Reference numerals:

[0022] 110. compressor; 111. first-stage compression mechanism; 1110. second air inlet; 112. second-stage compression mechanism; 120. first pipeline; 130. first valve; 140. second pipeline; 150. second valve; 160. third pipeline; 170. third valve; 180. gas drying unit; 190. fourth pipeline; 191. multi-way pipe fitting; 192. fourth valve; 193. fifth valve; 194. pressure sensor; 195. gas storage tank; 196. air spring. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present embodiment.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this embodiment, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In this embodiment, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like 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 or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0027] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] Figures 1 to 3 The compressed air supply device (or air compression system) for an air suspension system provided by the present invention is shown. As can be seen from the figure, the compressed air supply device for an air suspension system of the present invention includes a compressor 110, a first pipeline 120 and a first valve 130; the compressor 110 includes a first-stage compression mechanism 111 and a second-stage compression mechanism 112; the air inlet of the first-stage compression mechanism 111 is connected to the air outlet of the air storage tank 195, and the air outlet of the first-stage compression mechanism 111 is connected between the air outlet of the second-stage compression mechanism 112 and the air inlet of the air spring 196; the air outlet of the second-stage compression mechanism 112 is connected to the air inlet of the air spring 196; one end of the first pipeline 120 is connected to the air outlet of the first-stage compression mechanism 111, and the other end of the first pipeline 120 is connected to the air inlet of the second-stage compression mechanism 112; the first valve 130 is arranged on the first pipeline 120, and the first valve 130 can be closed when the air storage tank 195 is in the outlet state.

[0029] In a specific implementation, when the gas storage tank 195 is in the gas outlet state, that is, when the suspension height of the vehicle needs to be quickly increased, the gas in the gas storage tank 195 will flow into the first-stage compression mechanism 111. After the gas flows into the first-stage compression mechanism 111, the gas will be compressed, and the compressed gas will be divided into two paths, namely the first path and the second path. The first path flows toward the second-stage compression mechanism 112, and the second path flows toward the air spring 196. Since the first valve 130 is closed when the gas storage tank 195 is in the gas outlet state, the first path is interrupted and is not connected, and the gas can only flow from the second path to the air spring 196; since the gas stored in the gas storage tank 195 only passes through the first-stage compression mechanism 111, and does not pass through the second-stage compression mechanism 1 12, and the volume of the first-stage compression chamber of the first-stage compression mechanism 111 is larger than the volume of the second-stage compression chamber of the second-stage compression mechanism 112, therefore, for each rotation of the motor, the volume of the gas in the air tank 195 compressed by the first-stage compression chamber is larger than the volume of the gas in the air tank 195 compressed by the second-stage compression chamber, that is, the speed of using the first-stage compression chamber to compress the gas in the air tank 195 to inflate the air spring 196 is larger than the speed of using the second-stage compression chamber to compress the gas in the air tank 195 to inflate the air spring 196, compared with the prior art, the speed at which the gas enters the air spring 196 is faster, therefore, the vehicle suspension height is increased faster, thereby solving the technical problem of the slow increase in the vehicle suspension height in the prior art.

[0030] In the present embodiment, the first-stage compression mechanism 111 and the second-stage compression mechanism 112 are each equivalent to a compressor 110, and the first-stage compression mechanism 111 and the second-stage compression mechanism 112 each include a cavity; when the compressor is working, it generally inhales air first and then compresses air. When inhaling air, the cavity is called an intake cavity, and when compressing air, the cavity is called a compression cavity. For ease of understanding and description, the compression cavity of the first-stage compression mechanism 111 can be called a first-stage compression cavity. Similarly, the compression cavity of the second-stage compression mechanism 112 can be called a second-stage compression cavity. The compressor 110 can reduce the volume of the gas entering it through mechanical movement, and at the same time increase the pressure of the gas.

[0031] According to one embodiment of the present invention, the first-stage compression mechanism 111 has a first air inlet and a second air inlet 1110; the second air inlet 1110 is connected to the atmosphere; the compressed air supply device for the air suspension system also includes a second pipeline 140 and a second valve 150; one end of the second pipeline 140 is connected to the air outlet of the air storage tank 195; the other end of the second pipeline 140 is connected to the first air inlet; the second valve 150 is arranged on the second pipeline 140; in the first state, the first valve 130 is closed and the second valve 150 is opened; in the second state, the first valve 130 is opened and the second valve 150 is closed.

[0032] In specific implementation, the first state may correspond to a working condition where the suspension height of the vehicle needs to be increased quickly; the second state may correspond to a working condition where the suspension height of the vehicle needs to be increased slowly; Figure 2 As shown, in the first state, the first valve 130 is closed and the second valve 150 is opened, so that the gas in the gas storage tank 195 flows out from the gas outlet of the gas storage tank 195, passes through the second pipeline 140 and flows into the first-stage compression mechanism 111 through the first gas inlet. After the gas flows into the first-stage compression mechanism 111, the gas will be compressed, and the compressed gas will be divided into two paths, namely the first path and the second path. The first path flows toward the second-stage compression mechanism 112, and the second path flows toward the air spring 196. Since the first valve 130 is closed in the gas outlet state of the gas storage tank 195, the first path is interrupted and not connected, and the gas can only flow from the second path to the air spring 196; since the gas stored in the gas storage tank 195 only passes through the first The first-stage compression mechanism 111 does not pass through the second-stage compression mechanism 112, and the volume of the first-stage compression chamber of the first-stage compression mechanism 111 is larger than the volume of the second-stage compression chamber of the second-stage compression mechanism 112. Therefore, for each rotation of the motor, the volume of the gas in the air tank 195 compressed by the first-stage compression chamber is larger than the volume of the gas in the air tank 195 compressed by the second-stage compression chamber. That is, the speed of using the first-stage compression chamber to compress the gas in the air tank 195 to inflate the air spring 196 is greater than the speed of using the second-stage compression chamber to compress the gas in the air tank 195 to inflate the air spring 196. Compared with the prior art, the speed at which the gas enters the air spring 196 is faster, so the vehicle suspension height is increased faster; Figure 3 As shown, in the second state, the first valve 130 is opened and the second valve 150 is closed, so that the second pipeline 140 is not conductive, and the gas in the air tank 195 will not flow from the air outlet of the air tank 195 through the second pipeline 140 and into the first-stage compression mechanism 111 through the first air inlet, while the gas in the atmosphere will enter the first-stage compression mechanism 111 through the second air inlet 1110, and will be divided into two paths after entering, one of the two paths flows toward the air spring 196, and the other of the two paths flows to the second compressor 110 for further compression, and then flows toward the air spring 196 after being further compressed by the second compressor 110.

[0033] According to one embodiment of the present invention, the compressed air supply device for the air suspension system of the present invention may also include a third pipeline 160, and the air outlet of the first-stage compression mechanism 111 is connected between the air outlet of the second-stage compression mechanism 112 and the air inlet of the air spring 196 through the third pipeline 160.

[0034] According to one embodiment of the present invention, the compressed air supply device for an air suspension system of the present invention may further include a third valve 170, which is arranged in the third pipeline 160; in the first state, the first valve 130 is closed, and the second valve 150 and the third valve 170 are opened.

[0035] In specific implementation, the first state may correspond to a working condition where the suspension height of the vehicle needs to be quickly increased. In the first state, the first valve 130 is closed, and the second valve 150 and the third valve 170 are opened. As a result, the gas in the gas tank 195 flows out from the gas outlet of the gas tank 195 and flows into the first-stage compression mechanism 111 through the first gas inlet. After the gas flows into the first-stage compression mechanism 111, the gas will be compressed. The compressed gas will be divided into two paths, namely the first path and the second path. The first path flows toward the second-stage compression mechanism 112 through the first pipeline 120, and the second path flows toward the air spring 196 through the third pipeline 160. Since the first valve 130 is closed in the gas outlet state of the gas tank 195, the first path is interrupted and not conductive, and the gas can only flow from the second path through the third pipeline 160 to the air spring 196. Air spring 196; since the gas stored in the air tank 195 only passes through the first-stage compression mechanism 111 and does not pass through the second-stage compression mechanism 112, and the volume of the first-stage compression chamber of the first-stage compression mechanism 111 is larger than the volume of the second-stage compression chamber of the second-stage compression mechanism 112, therefore, for every rotation of the motor, the volume of the gas in the air tank 195 compressed by the first-stage compression chamber is larger than the volume of the gas in the air tank 195 compressed by the second-stage compression chamber, that is, the speed of using the first-stage compression chamber to compress the gas in the air tank 195 to inflate the air spring 196 is greater than the speed of using the second-stage compression chamber to compress the gas in the air tank 195 to inflate the air spring 196. Compared with the prior art, the speed at which the gas enters the air spring 196 is faster, and therefore, the vehicle suspension height is increased faster.

[0036] According to one embodiment of the present invention, the third valve 170 is a one-way valve, which can connect the air outlet of the first-stage compression mechanism 111 to the air inlet of the air spring 196 .

[0037] In specific implementation, the above-mentioned structural setting can prevent gas from flowing from the air spring 196 to the first-stage compression mechanism 111 through the third pipeline 160.

[0038] According to one embodiment of the present invention, the compressed air supply device for an air suspension system of the present invention may further include a gas drying unit 180, having a drying chamber containing a moisture adsorbent, a drying chamber inlet and a drying chamber outlet; the drying chamber inlet is connected to the drying chamber outlet through the drying chamber; the compressed air supply device for an air suspension system also includes a fourth pipeline 190, one end of the fourth pipeline 190 is connected to the air outlet of the second-stage compression mechanism 112, and the other end of the fourth pipeline 190 is connected to the air inlet of the air spring 196; the other end of the third pipeline 160 is connected to the fourth pipeline 190; the gas drying unit 180 is arranged in the fourth pipeline 190, and is located between the air outlet of the second-stage compression mechanism 112 and the air spring 196.

[0039] In a specific implementation, since humid gas may have an adverse effect on the air spring 196 , the gas may be dried by the gas drying unit 180 before the gas flows into the air spring 196 .

[0040] According to one embodiment of the present invention, the compressed air supply device for an air suspension system of the present invention may also include a multi-way pipe fitting 191, the multi-way pipe fitting 191 having an inlet end, a first outlet end and a second outlet end; the other end of the fourth pipeline 190 is connected to the inlet end of the multi-way pipe fitting 191; the first outlet end is connected to the air inlet of the air spring 196; and the second outlet end is connected to the air inlet of the air tank 195.

[0041] According to one embodiment of the present invention, the compressed air supply device for an air suspension system of the present invention may also include a fourth valve 192 and a fifth valve 193; the fourth valve 192 is arranged between the first outlet end and the air inlet of the air spring 196; the fifth valve 193 is arranged between the second outlet end and the air inlet of the air tank 195; in the first state, the first valve 130 and the fifth valve 193 are closed, and the second valve 150, the third valve 170 and the fourth valve 192 are opened; in the second state, the first valve 130 and the fifth valve 193 are opened, and the second valve 150, the third valve 170 and the fourth valve 192 are closed.

[0042] In a specific implementation, the fourth valve 192 and the fifth valve 193 are opened or closed to control whether the air spring 196 and the air storage tank 195 are intake air.

[0043] According to one embodiment of the present invention, the compressed air supply device for the air suspension system of the present invention may also include a pressure sensor 194 and a controller; the pressure sensor 194 is arranged on the air spring 196 for detecting the air pressure in the air spring 196; the controller is electrically connected to the pressure sensor 194, the second valve 150, the fourth valve 192 and the fifth valve 193.

[0044] In a specific implementation, the controller can control the first valve 130 to the fifth valve 193 according to the air pressure value in the air spring 196 detected by the pressure sensor 194 to improve the control efficiency and reduce physical labor.

[0045] In this embodiment, the first valve 130 and the third valve 170 may be existing pneumatic valves; the second valve 150 , the fourth valve 192 , and the fifth valve 193 may be existing solenoid valves.

[0046] The present invention also provides a car, comprising the compressed air supply device for an air suspension system of the above embodiment. The specific structure, working principle and beneficial effects of the compressed air supply device for an air suspension system are the same as those of the above embodiment, and will not be repeated here.

[0047] 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 conjunction with the embodiment or mode are included in at least one embodiment or mode of the embodiment 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 any one or more embodiments or modes in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or modes described in this specification and the features of the different embodiments or modes, without contradiction.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A compressed air supply device for an air suspension system, characterized in that: It comprises a compressor (110), a first pipeline (120) and a first valve (130); The compressor (110) comprises a first-stage compression mechanism (111) and a second-stage compression mechanism (112); an air inlet of the first-stage compression mechanism (111) is connected to an air outlet of an air storage tank (195); an air outlet of the first-stage compression mechanism (111) is connected between an air outlet of the second-stage compression mechanism (112) and an air inlet of an air spring (196); and an air outlet of the second-stage compression mechanism (112) is connected to an air inlet of the air spring (196); One end of the first pipeline (120) is connected to the air outlet of the first-stage compression mechanism (111), and the other end of the first pipeline (120) is connected to the air inlet of the second-stage compression mechanism (112); The first valve (130) is arranged on the first pipeline (120), and the first valve (130) can be closed when the gas storage tank (195) is in a gas outlet state.

2. The compressed air supply device for an air suspension system according to claim 1, characterized in that: The first-stage compression mechanism (111) has a first air inlet and a second air inlet (1110); The second air inlet (1110) is connected to the atmosphere; The compressed air supply device for the air suspension system also includes a second pipeline (140) and a second valve (150); One end of the second pipeline (140) is connected to the air outlet of the air storage tank (195), and the other end of the second pipeline (140) is connected to the first air inlet; The second valve (150) is disposed on the second pipeline (140); In a first state, the first valve (130) is closed and the second valve (150) is opened; In the second state, the first valve (130) is open and the second valve (150) is closed.

3. The compressed air supply device for an air suspension system according to claim 2, characterized in that: It also includes a third pipeline (160), and the air outlet of the first-stage compression mechanism (111) is connected to the air outlet of the second-stage compression mechanism (112) and the air inlet of the air spring (196) through the third pipeline (160).

4. The compressed air supply device for an air suspension system according to claim 3, characterized in that: It also includes a third valve (170) disposed on the third pipeline (160); In the first state, the first valve (130) is closed, and the second valve (150) and the third valve (170) are opened.

5. The compressed air supply device for an air suspension system according to claim 4, characterized in that: The third valve (170) is a one-way valve, which can connect the air outlet of the first-stage compression mechanism (111) to the air inlet of the air spring (196).

6. The compressed air supply device for an air suspension system according to claim 4, characterized in that: It also includes a gas drying unit (180) having a drying chamber containing a moisture adsorbent, a drying chamber inlet, and a drying chamber outlet; the drying chamber inlet is connected to the drying chamber outlet through the drying chamber; The compressed air supply device for the air suspension system further comprises a fourth pipeline (190), one end of the fourth pipeline (190) is connected to the air outlet of the second-stage compression mechanism (112), and the other end of the fourth pipeline (190) is connected to the air inlet of the air spring (196); The other end of the third pipeline (160) is connected to the fourth pipeline (190); The gas drying unit (180) is arranged in the fourth pipeline (190) and is located between the gas outlet of the second-stage compression mechanism (112) and the air spring (196).

7. The compressed air supply device for an air suspension system according to claim 6, characterized in that: Also included is a multi-way pipe member (191), wherein the multi-way pipe member (191) has an inlet end, a first outlet end, and a second outlet end; The other end of the fourth pipeline (190) is connected to the inlet end of the multi-way pipe member (191); The first outlet end is connected to the air inlet of the air spring (196); The second outlet end is connected to the air inlet of the air storage tank (195).

8. The compressed air supply device for an air suspension system according to claim 7, characterized in that: Also includes a fourth valve (192) and a fifth valve (193); The fourth valve (192) is disposed between the first outlet end and the air inlet of the air spring (196); The fifth valve (193) is disposed between the second outlet end and the air inlet of the air storage tank (195); In the first state, the first valve (130) and the fifth valve (193) are closed, and the second valve (150), the third valve (170) and the fourth valve (192) are opened; In the second state, the first valve (130) and the fifth valve (193) are opened, and the second valve (150), the third valve (170) and the fourth valve (192) are closed.

9. The compressed air supply device for an air suspension system according to claim 8, characterized in that: Also included is a pressure sensor (194) and a controller; The pressure sensor (194) is disposed on the air spring (196) and is used to detect the air pressure in the air spring (196); The controller is electrically connected to the pressure sensor (194), the second valve (150), the fourth valve (192) and the fifth valve (193).

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