A compressed air supply device for operating a vehicle air suspension system

Abstract

The present invention relates to the technical field of air supply equipment, and in particular to a compressed air supply device for operating a vehicle air suspension system, which includes: a compressor having an exhaust end and an intake end; a valve control unit having a first valve port and a second valve port, the first valve port being connected to a second connecting pipe, and when the valve control unit is in an exhaust state, the first valve port and the second valve port are connected; and a deflation unit connected between the second connecting pipe and the external environment. The present invention controls the exhaust state by setting a preset pressure of the valve control unit. When it is in an exhaust state, the second valve port and the first valve port are connected, a part of the high-pressure gas is discharged through the second valve port and drives the exhaust valve to exhaust to the external environment through the fourth valve port, thereby protecting the air-using unit from being damaged by high pressure, and a part of the high-pressure gas is discharged through the second valve port to blow air to the seventh valve port of the pilot valve, and take away the moisture inside it and discharge it to the external environment, thereby preventing the deflation unit from being corroded by moisture.

Description

Technical Field

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

[0002] At present, the compressed air supply device used to operate the vehicle air suspension system mostly contains various valve structures to adjust the supply status of compressed air. However, due to the use environment of the vehicle, a part of the valve structure is always connected to the atmosphere. When in a high humidity environment, there will be water vapor inside the valve structure. The accumulated water vapor is difficult to discharge, resulting in corrosion of the valve structure; in particular, when the ambient temperature reaches zero, the accumulated water vapor will condense into ice, affecting the normal opening of the valve structure. On the one hand, the normal deflation function is affected due to the failure of the valve structure, and on the other hand, the service life of the valve structure is reduced. Summary of the invention

[0003] The present invention provides a compressed air supply device for operating a vehicle air suspension system, which is used to solve the defect that the compressed air supply device in the background art is difficult to discharge the water vapor accumulated in a part of the valve structure, which affects its service life and may cause its failure.

[0004] The present invention provides a compressed air supply device for operating a vehicle air suspension system, comprising:

[0005] A compressor having an exhaust end and an intake end;

[0006] A first connecting pipe connected between the air inlet end and the external environment;

[0007] A second connecting pipe is connected between the exhaust end and the gas using unit;

[0008] The valve control unit has a first valve port and a second valve port, wherein the first valve port is connected to the second connecting pipe; when the valve control unit is in an exhaust state, the second valve port is connected to the first valve port,

[0009] The air release unit is connected between the second connecting pipe and the external environment.

[0010] According to a compressed air supply device for operating a vehicle air suspension system provided by the present invention, the deflation unit comprises:

[0011] an exhaust valve having a fourth valve port, a fifth valve port and a sixth valve port, wherein the fourth valve port is communicated with the second valve port, the fifth valve port is connected to the outlet of the second connecting pipe, and when the exhaust valve is in a deflated state, the fifth valve port is communicated with the sixth valve port, and the sixth valve port is communicated with the atmosphere;

[0012] A pilot valve is connected to the second valve port.

[0013] According to a compressed air supply device for operating a vehicle air suspension system provided by the present invention, when the pressure output by the compressor to the first valve port is greater than a first preset pressure, the second valve port is connected to the first valve port; when the pressure output by the second valve port to the fourth valve port is greater than the second preset pressure, the fifth valve port is connected to the sixth valve port;

[0014] Wherein, the second preset pressure is set to be smaller than the first preset pressure.

[0015] A compressed air supply device for operating a vehicle air suspension system according to the present invention further includes:

[0016] The air drying tank is arranged on the second connecting pipe.

[0017] A compressed air supply device for operating a vehicle air suspension system according to the present invention further includes:

[0018] a third connecting pipe connected between the second connecting pipe and the first valve port;

[0019] a fourth connecting pipe connected between the second connecting pipe and the first valve port;

[0020] The fifth communicating pipe is connected between the second communicating pipe and the fifth valve port.

[0021] According to a compressed air supply device for operating a vehicle air suspension system provided by the present invention, the pilot valve has a seventh valve port, an eighth valve port and a ninth valve port, the seventh valve port is connected to the second valve port, the eighth valve port is connected to the second connecting pipe, and the ninth valve port is connected to the external environment.

[0022] A compressed air supply device for operating a vehicle air suspension system according to the present invention further includes:

[0023] A sixth communicating pipe is connected between the ninth valve port and the first communicating pipe.

[0024] According to a compressed air supply device for operating a vehicle air suspension system provided by the present invention, the valve control unit is a relief valve.

[0025] The present invention provides a compressed air supply device for operating a vehicle air suspension system, which includes: a compressor, a valve control unit, a first connecting pipe, a second connecting pipe and a deflation unit. The compressor has an exhaust end and an intake end; the valve control unit has a first valve port and a second valve port, the first valve port is connected to the second connecting pipe, and when the valve control unit is in an exhaust state, the second valve port is connected to the first valve port; the deflation unit is connected between the second connecting pipe and the external environment. The present invention provides a compressed air supply device for operating a vehicle air suspension system, which controls the exhaust state by setting a first preset pressure of the valve control unit. When it is in an exhaust state, the second valve port and the first valve port are connected. On the one hand, the pressure discharged through the second valve port acts on the fourth valve port, overcomes the second preset pressure, opens the exhaust valve, that is, conducts the fifth valve port and the sixth valve port, and the gas exceeding the first preset pressure is discharged to the external environment through the exhaust valve, thereby protecting the gas unit from being damaged by high-pressure gas. On the other hand, the seventh valve port flowing to the pilot valve through the second valve port is discharged to the external environment through the ninth valve port, and takes away the moisture inside and discharges it to the external environment, thereby preventing the deflation unit from being corroded by moisture. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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.

[0027] Figure 1 It is a structural schematic diagram of a compressed air supply device for operating a vehicle air suspension system provided in one embodiment of the present invention.

[0028] Figure 2 It is a schematic diagram of a compressed air supply device for operating a vehicle air suspension system provided in one embodiment of the present invention when in a first working state.

[0029] Figure 3 It is a schematic diagram of a compressed air supply device for operating a vehicle air suspension system provided in one embodiment of the present invention when in a second working state.

[0030] Figure 4 It is a schematic diagram of a compressed air supply device for operating a vehicle air suspension system provided in one embodiment of the present invention when in a third working state.

[0031] Reference numerals:

[0032] 1: compressor; 2: valve control unit; 21: first valve port; 22: second valve port; 3: exhaust valve; 31: fourth valve port; 32: fifth valve port; 33: sixth valve port; 4: pilot valve; 41: seventh valve port; 42: eighth valve port; 43: ninth valve port; 5: first connecting pipe; 6: second connecting pipe; 7: third connecting pipe; 8: fourth connecting pipe; 9: fifth connecting pipe; 10: sixth connecting pipe; 11: air drying tank; 12: air unit. DETAILED DESCRIPTION

[0033] 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.

[0034] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0035] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0036] 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.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example 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 example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0038] Combine the following Figure 1-Figure 4 The invention describes a compressed air supply device for operating a vehicle air suspension system. The compressed air supply device for operating a vehicle air suspension system comprises: a compressor 1, a valve control unit 2, a first connecting pipe 5, a second connecting pipe 6 and an air release unit.

[0039] The compressor 1 has an exhaust end and an intake end, and high-pressure gas is discharged through the exhaust end.

[0040] The first connecting pipe 5 is connected between the air inlet end and the external environment; the second connecting pipe 6 is connected between the air outlet end and the air using unit 12;

[0041] The valve control unit 2 has a first valve port 21 and a second valve port 22. The first valve port 21 is connected to the second connecting pipe 6. When the valve control unit 2 is in the exhaust state, the second valve port 22 is connected to the first valve port 21. The valve control unit 2 can use a relief valve with two valve ports, an air inlet and an exhaust port. The connection state of the second valve port 22 and the first valve port 21 is controlled according to the gas pressure introduced into the first valve port 21. Therefore, the valve control unit 2 has an exhaust state and a non-exhaust state. When the pressure of the first valve port 21 is greater than the preset pressure, the second valve port 22 is connected to the first valve port 21. When the valve control unit 2 is in the exhaust state, the second valve port 22 is connected to the first valve port 21; when the valve control unit 2 is in the non-exhaust state, the second valve port 22 is disconnected from the first valve port 21.

[0042] The deflation unit is connected between the second connecting pipe 6 and the external environment. When the valve control unit 2 is in the exhaust state, that is, the second valve port 22 is connected to the first valve port 21, a part of the high-pressure gas discharged through the second valve port 22 drives the exhaust valve 3 to exhaust to the external environment through the fourth valve port 31, thereby protecting the gas unit 12 from being damaged by high pressure, and another part of the high-pressure gas discharged through the second valve port 22 blows the seventh valve port 41 of the pilot valve 4 to take away the moisture in the deflation unit and prevent the deflation unit from being corroded by moisture. Generally, the air release unit and the valve control unit 2 in this embodiment can adopt a valve structure, and the maximum pressure of the gas unit 12 is controlled by the first preset pressure of the valve control unit 2. When the maximum pressure in the gas unit 12 is greater than or equal to the first preset pressure of the valve control unit 2, under the action of the gas pressure of the first valve port 21, the connection between the second valve port 22 and the first valve port 21 is controlled. On the one hand, the pressure discharged through the second valve port 22 acts on the fourth valve port 31, overcomes the second preset pressure, opens the exhaust valve 3, that is, connects the fifth valve port 32 and the sixth valve port 33, and the gas exceeding the first preset pressure passes through the exhaust valve 3 and is discharged to the external environment, thereby protecting the gas unit 12 from being damaged by high-pressure gas. On the other hand, it flows through the second valve port 22 to the seventh valve port 41 of the pilot valve 4 and is discharged to the external environment through the ninth valve port 43. By blowing air into the valve structure, moisture inside the valve structure is taken away to avoid moisture corrosion. Furthermore, because the valve control unit 2 adopts the form of an overflow valve, which only allows airflow greater than a certain pressure to pass through, the airflow can better carry away the moisture in the valve structure, thereby avoiding valve structure failure and improving the safety and stability of the valve structure.

[0043] The present invention provides a compressed air supply device for operating a vehicle air suspension system, which includes: a compressor 1, a valve control unit 2, a first connecting pipe 5, a second connecting pipe 6 and a deflation unit. The compressor 1 has an exhaust end and an intake end; the first connecting pipe 5 is connected between the intake end and the external environment; the second connecting pipe 6 is connected between the exhaust end and the air-using unit 12; the valve control unit 2 has a first valve port 21 and a second valve port 22, the first valve port 21 is connected to the second connecting pipe 6, and when the valve control unit 2 is in the exhaust state, the second valve port 22 is connected to the first valve port 21; the deflation unit is connected between the second connecting pipe 6 and the external environment. The present invention provides a compressed air supply device for operating a vehicle air suspension system, which controls the exhaust state by setting a valve control unit 2. When it is in the exhaust state, the second valve port 22 and the first valve port 21 are connected, and the air flow is discharged through the second valve port 22 to the seventh valve port 41 of the pilot valve 4 and then to the external environment through the ninth valve port 43, taking away the moisture inside, thereby preventing the degassing unit from being corroded by moisture, and further preventing the pilot valve 4 from freezing.

[0044] In one embodiment of the present invention, the deflation unit includes: an exhaust valve 3 and a pilot valve 4. The exhaust valve 3 has a fourth valve port 31, a fifth valve port 32 and a sixth valve port 33. The fourth valve port 31 is connected to the second valve port 22, and the fifth valve port 32 is connected to the outlet of the second connecting pipe. When the exhaust valve 3 is in the deflation state, the fifth valve port 32 is connected to the sixth valve port 33, and the sixth valve port 33 is connected to the atmosphere; the pilot valve 4 is connected to the second valve port 22. Specifically, the deflation unit is composed of the exhaust valve 3 and the pilot valve 4, which are connected to each other, that is, the "pilot exhaust valve" described in the art. The gas discharged from the second valve port 22 passes through the pilot valve 4 to take away the moisture inside the pilot valve 4, so as to prevent the deflation unit from being corroded by moisture, and then prevent the pilot valve 4 from freezing. In this state, the air flow direction (indicated by the arrow direction) is as follows: Figure 2 The first working state shown; if, before the second valve port 22 is exhausted, the pilot valve 4 has a problem of affecting its exhaust state due to ice or other phenomena, and the gas cannot be discharged from the pilot valve 4, at this time, the exhaust valve 3 is in a deflated state, so that the fifth valve port 32 is connected to the sixth valve port 33, and part or all of the gas exhausted from the second valve port 22 enters the exhaust valve 3 through the fourth valve port 31, and connects the fifth valve port 32 and the sixth valve port 33, and the gas exhausted by the compressor 1 is discharged to the atmosphere through the fifth valve port 32 and the sixth valve port 33. Even when the pilot valve 4 fails, only part of the gas can be discharged or the gas cannot be discharged at all, it does not affect the exhaust state of the overall equipment. In this state, the air flow direction (indicated by the arrow direction) is as follows Figure 3 The second working state is shown.

[0045] When the above embodiment is implemented, if there is no icing in the pilot valve 4, it can be opened normally. When the valve control unit 2 is in the exhaust state, the airflow can bring out the moisture inside it through the pilot valve 4, so as to avoid the pilot valve 4 from being corroded by moisture and iced, and ensure its dry state; if the pilot valve 4 has ice inside due to its internal water vapor and is in a cold environment, it will affect the normal opening of the pilot valve 4 and cannot be exhausted normally. Therefore, when the valve control unit 2 is in the exhaust state, the airflow cannot pass through the pilot valve 4 and can only be discharged from the exhaust valve 3. When the exhaust valve 3 is in the exhaust state, the fifth valve port 32 and the sixth valve port 33 are connected. At this time, the gas exhausted by the compressor 1 can be directly discharged into the atmosphere through the fifth valve port 32 and the sixth valve port 33 without passing through the pilot valve 4. Even if the pilot valve 4 cannot exhaust, it will not affect the normal exhaust of the compressor 1 by the exhaust valve 3.

[0046] In one embodiment of the present invention, when the compressor 1 outputs a pressure greater than the first preset pressure to the first valve port 21, the first preset pressure may generally be 20 bar (to ensure that the gas unit 12 is not damaged by high pressure), and the second valve port 22 is connected to the first valve port 21; when the second valve port 22 outputs a pressure greater than the second preset pressure to the fourth valve port 31, the second preset pressure may generally be 2 bar (only serves to overcome the spring force of the exhaust valve 3, thereby opening the exhaust valve 3 and achieving exhaust), and the fifth valve port 32 is connected to the sixth valve port 33; wherein, the second preset pressure is set to be lower than the first preset pressure. In this embodiment, the valve control unit 2 adopts the overflow valve form. When the first valve port 21 is subjected to the air pressure greater than the first preset pressure, the movable part in the first valve port 21 is driven to connect the second valve port 22 with the first valve port 21, so that the airflow output by the compressor 1 passes through the first valve port 21 and the second valve port 22, and a part of it passes through the fourth valve port 31 of the exhaust valve 3 to overcome the second preset pressure to connect the fifth valve port 32 and the sixth valve port 33 of the exhaust valve 3, and a part of it is discharged to the external environment through the seventh valve port 41 and the ninth valve port 43 of the pilot valve 4. It should be understood that, according to the actual situation, the overflow valve is selected to ensure that the second valve port 22 and the first valve port 21 can be connected, and the fifth valve port 32 and the sixth valve port 33 can be connected under a specific pressure value.

[0047] During the specific implementation of the above embodiment, since the fourth valve port 31 receives the gas from the second valve port 22 , the second preset pressure should be smaller than the first preset pressure.

[0048] In the specific implementation of the above embodiment, when the pressure output by the compressor 1 to the first valve port 21 is less than or equal to the first preset pressure, the exhaust of the compressor 1 cannot drive the valve control unit 2 to operate, and the gas output by the compressor 1 is not transmitted through the valve control unit 2 and the air release unit, and all the gas output by the compressor 1 is delivered to the gas using unit 12, that is, Figure 4 The third working state is shown.

[0049] During the specific implementation of this embodiment, gas is input into the compressor 1 through the first connecting pipe 5. When the pressure of the gas discharged from the compressor 1 is less than or equal to the first preset pressure, the compressor 1 does not need to be exhausted, and the second valve port 22 and the first valve port 21 are disconnected. At this time, the gas discharged from the compressor 1 is transported to the gas consumption unit 12 through the second connecting pipe 6.

[0050] In one embodiment of the present invention, the compressed air supply device for operating the vehicle air suspension system also includes: an air drying tank 11, which is arranged on the second connecting pipe 6. The air drying tank 11 dries the gas output by the compressor 1 to ensure that the air unit 12 uses dry gas to avoid damage.

[0051] In one embodiment of the present invention, the compressed air supply device for operating the vehicle air suspension system further includes: a third connecting pipe 7, a fourth connecting pipe 8 and a fifth connecting pipe 9. The third connecting pipe 7 is connected between the second connecting pipe 6 and the first valve port 21; the fourth connecting pipe 8 is connected between the second connecting pipe 6 and the first valve port 21; and the fifth connecting pipe 9 is connected between the second connecting pipe 6 and the fifth valve port 32. In the specific implementation of this embodiment, the third connecting pipe 7, the fourth connecting pipe 8 and the fifth connecting pipe 9 are connected in parallel to the second connecting pipe 6, so that the first valve port 21 and the fifth valve port 32 can both receive the exhaust gas of the compressor 1.

[0052] In one embodiment of the present invention, the pilot valve 4 has a seventh valve port 41, an eighth valve port 42 and a ninth valve port 43, the seventh valve port 41 is connected to the second valve port 22, the eighth valve port 42 is connected to the gas unit 12, and the ninth valve port 43 is connected to the atmosphere. Specifically, the pilot valve 4 receives exhaust gas from the second valve port 22, and discharges it to the atmosphere through the seventh valve port 41 and the ninth valve port 43 in sequence.

[0053] In one embodiment of the present invention, the compressed air supply device for operating the vehicle air suspension system also includes: a sixth connecting pipe 10, the sixth connecting pipe 10 is connected between the ninth valve port 43 and the first connecting pipe 5, and the gas discharged from the ninth valve port 43 is discharged into the atmosphere through the sixth connecting pipe 10.

[0054] In one embodiment of the present invention, the valve control unit 2 is a relief valve.

[0055] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, i.e., may be located in one place, or may be distributed over multiple units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment. Those of ordinary skill in the art may understand and implement the present invention without creative effort.

[0056] 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 operating a vehicle air suspension system, characterized in that include: A compressor (1) having an exhaust end and an intake end; A first connecting pipe (5), connected between the air inlet end and the external environment; A second connecting pipe (6) connected between the exhaust end and the gas using unit (12); A valve control unit (2) having a first valve port (21) and a second valve port (22), wherein the first valve port (21) is in communication with the second communication pipe (6), and when the valve control unit (2) is in an exhaust state, the second valve port (22) is in communication with the first valve port (21); A degassing unit connected between the second connecting pipe (6) and the external environment; The deflation unit comprises: an exhaust valve (3), comprising a fourth valve port (31), a fifth valve port (32) and a sixth valve port (33), wherein the fourth valve port (31) is in communication with the second valve port (22), the fifth valve port (32) is connected to the outlet of the second connecting pipe (6), and when the exhaust valve (3) is in a deflated state, the fifth valve port (32) is in communication with the sixth valve port (33), and the sixth valve port (33) is in communication with the atmosphere; A pilot valve (4) connected to the second valve port (22); The gas discharged from the second valve port (22) passes through the pilot valve (4) to remove moisture inside the pilot valve (4), thereby preventing the degassing unit from being corroded by moisture, and further preventing the pilot valve (4) from freezing; If, before the second valve port (22) is exhausted, the pilot valve (4) has a problem of affecting its exhaust state due to icing, and the gas cannot be discharged from the pilot valve (4), then the exhaust valve (3) is in a deflated state, so that the fifth valve port (32) is connected to the sixth valve port (33), and part or all of the gas exhausted from the second valve port (22) enters the exhaust valve (3) through the fourth valve port (31), and connects the fifth valve port (32) and the sixth valve port (33), and the gas exhausted from the compressor (1) is discharged to the atmosphere through the fifth valve port (32) and the sixth valve port (33). Even if the pilot valve (4) fails and can only partially discharge the gas or cannot discharge the gas at all, the exhaust state of the entire equipment is not affected; When the pressure output by the compressor (1) to the first valve port (21) is greater than a first preset pressure, the second valve port (22) is connected to the first valve port (21); when the pressure output by the second valve port (22) to the fourth valve port (31) is greater than the second preset pressure, the fifth valve port (32) is connected to the sixth valve port (33); Wherein, the second preset pressure is set to be lower than the first preset pressure; The pilot valve (4) has a seventh valve port (41), an eighth valve port (42) and a ninth valve port (43); the seventh valve port (41) is connected to the second valve port (22); the eighth valve port (42) is connected to the second connecting pipe (6); and the ninth valve port (43) is connected to the external environment.

2. A compressed air supply device for operating a vehicle air suspension system according to claim 1, characterized in that: Also includes: An air drying tank (11) is arranged on the second connecting pipe (6).

3. A compressed air supply device for operating a vehicle air suspension system according to claim 1, characterized in that: Also includes: a third connecting pipe (7), connected between the second connecting pipe (6) and the first valve port (21), and used for driving the movable part in the first valve port (21) to move; a fourth connecting pipe (8) connected between the second connecting pipe (6) and the first valve port (21); The fifth connecting pipe (9) is connected between the second connecting pipe (6) and the fifth valve port (32).

4. A compressed air supply device for operating a vehicle air suspension system according to claim 1, characterized in that: Also includes: A sixth connecting pipe (10), the sixth connecting pipe (10) being connected between the ninth valve port (43) and the first connecting pipe (5).

5. A compressed air supply device for operating a vehicle air suspension system according to any one of claims 1 to 4, characterized in that: The valve control unit (2) is a relief valve.

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