Air filtering equipment, air supply equipment, air suspension system and vehicle

Abstract

The invention discloses air filtering equipment, air supply equipment, an air suspension system and a vehicle. The air filtering equipment comprises a shell, an air supply device and an air filter, a drying agent, wherein the drying agent is arranged in the shell; the pressure relief pipe is arranged in the shell, the drying agent is located on the peripheral side of the pressure relief pipe, and deflation airflow enters the pressure relief pipe after passing through the drying agent and is discharged out of the shell. The pressure relief pipe is arranged, the drying agent is arranged on the peripheral side of the pressure relief pipe, the function of taking away moisture in the drying agent in the deflation process is achieved, the situation that a filter shell is additionally arranged in the shell can be avoided, and therefore the air filtering equipment can be simpler in overall structure, the number of parts is reduced, the integration degree is high, and then the cost can be reduced; the reliability of the air filtering equipment is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to an air filtering device, an air supply device, an air suspension system and a vehicle. BACKGROUND

[0002] In the related art, the air filtering device controls the pressure relief valve through the electromagnetic valve and realizes the processes of inflation, deflation and air release of the system, and the filter shell separates the filter element from the shell body to realize that the moisture of the drying agent is taken away through the filter cavity during deflation, thereby increasing the service life of the drying agent. However, the structure of the air filtering device is complex, the manufacturing cost is high, and the reliability is low. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides an air filtering device which realizes the function of taking away the moisture in the drying agent during the air release process, so that the overall structure of the air filtering device is simpler, the number of parts is reduced, the integration is high, the cost is reduced, and the reliability of the air filtering device is improved.

[0004] The present application further provides an air supply device.

[0005] The present application still further provides an air suspension system.

[0006] The present application still further provides a vehicle.

[0007] According to the air filtering device of the present application, the air filtering device comprises a shell body, a drying agent arranged in the shell body, and a pressure relief pipe arranged in the shell body, wherein the drying agent is arranged on the circumferential side of the pressure relief pipe, the air release flow passes through the drying agent and then enters the pressure relief pipe, and is discharged to the outside of the shell body.

[0008] According to the air filtering device of the present application, the pressure relief pipe is arranged, and the drying agent is arranged on the circumferential side of the pressure relief pipe, so that the function of taking away the moisture in the drying agent during the air release process is realized, and the filter shell can be avoided to be additionally arranged in the shell body, so that the overall structure of the air filtering device is simpler, the number of parts is reduced, the integration is high, the cost is reduced, and the reliability of the air filtering device is improved.

[0009] In some examples of the present application, the drying agent is arranged between the shell body and the pressure relief pipe.

[0010] In some examples of the present application, the drying agent is attached to the inner surface of the shell body, and the drying agent is attached to the outer surface of the pressure relief pipe.

[0011] In some examples of the present application, the housing is provided with an air inlet, and the pressure relief pipe is provided with an inlet and an outlet, the inlet is arranged adjacent to the air inlet, and the outlet is in communication with the outside of the housing.

[0012] In some examples of the present application, the air filtering device further comprises a first fixing member, the first fixing member is arranged adjacent to the air inlet, and the desiccant is fixed to a side of the first fixing member away from the air inlet.

[0013] In some examples of the present application, the air filtering device further comprises a second fixing member, the second fixing member is arranged spaced apart from the first fixing member in the axial direction of the housing, and the second fixing member is located on a side of the first fixing member away from the air inlet, and the desiccant is fixed between the first fixing member and the second fixing member.

[0014] In some examples of the present application, the pressure relief pipe is fixed to the first fixing member and the second fixing member.

[0015] In some examples of the present application, a drying cavity for accommodating the desiccant is defined between the first fixing member and the second fixing member, and the drying cavity is in communication with the air inlet.

[0016] In some examples of the present application, a separation cavity is defined between the first fixing member and the housing in the axial direction of the housing, and the separation cavity is in communication with the air inlet, the inlet of the pressure relief pipe, and the drying cavity, respectively.

[0017] In some examples of the present application, the housing comprises a main housing and an end cover, the end cover is arranged on the main housing, and the air inlet is arranged on the end cover.

[0018] In some examples of the present application, the air filtering device further comprises a first elastic member, the first elastic member abuts between the end cover and the first fixing member.

[0019] In some examples of the present application, the housing further comprises a mounting pipe and a return pipe, the outlet is selectively in communication with the mounting pipe, the return pipe is in communication with the mounting pipe, and the return pipe is in communication with the outside of the housing.

[0020] In some examples of the present application, the air filtering device further comprises a pressure relief valve, the pressure relief valve comprises a first sealing member, the first sealing member is fixed in the mounting pipe, and the first sealing member divides the mounting pipe into a first cavity and a second cavity, the first cavity is in communication with the return pipe, and the outlet is selectively in communication with the first cavity.

[0021] In some examples of the present application, the pressure relief valve further comprises a first valve core and a second valve core, the first valve core is connected with the second valve core, the first valve core selectively blocks the outlet, and the second valve core is movably arranged in the second cavity.

[0022] In some examples of the present application, the shell is further provided with an air outlet and an exhaust outlet, the exhaust outlet is in communication with the air outlet, an air inlet cavity is defined between the second valve core and the first sealing element, the shell is provided with a connecting channel, one end of the connecting channel is in communication with the air inlet cavity, and the other end of the connecting channel is connected between the air outlet and the exhaust outlet.

[0023] In some examples of the present application, the air filtering device further comprises a control valve arranged in the connecting channel to control the communication between the air inlet cavity and the exhaust outlet.

[0024] In some examples of the present application, the pressure relief valve further comprises a second elastic element and an adjusting cover, the adjusting cover is arranged on the mounting pipe, the adjusting cover is arranged opposite to the second valve core, and the second elastic element is connected between the second valve core and the adjusting cover.

[0025] In some examples of the present application, the pressure relief valve further comprises a second sealing element, the second sealing element is sealed between the second valve core and the inner wall of the mounting pipe.

[0026] According to the air supply device of the present application, the air filtering device described above is included.

[0027] According to the air suspension system of the present application, the air supply device described above is included.

[0028] According to the vehicle of the present application, the air suspension system described above is included.

[0029] Additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0030] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, taken in conjunction with the following drawings, in which: Figure 1 is a structural schematic diagram of an air filtering device according to an embodiment of the present application; Figure 2 is an exploded view of an air filtering device according to an embodiment of the present application; Figure 3 is a schematic diagram of an air filtering device according to an embodiment of the present application when being inflated; Figure 4 is a schematic view of the air filtering device according to an embodiment of the present application when deflating; Figure 5 is a schematic view of the air filtering device according to an embodiment of the present application when deflating.

[0031] Reference Signs: 1. air filtering device; 10. housing; 11. air inlet; 12. air outlet; 13. main housing; 14. end cover; 15. mounting pipe; 16. return pipe; 160. first cavity; 161. second cavity; 162. air inlet cavity; 17. air outlet; 18. connecting passage; 20. pressure relief pipe; 21. inlet; 22. outlet; 30. first fixing member; 40. second fixing member; 50. first elastic member; 60. pressure relief valve; 61. first valve core; 62. second valve core; 63. second elastic member; 64. adjusting cover; 65. first sealing member; 66. second sealing member; 70. control valve; 80. drying cavity; 90. separation cavity. DETAILED DESCRIPTION

[0032] Embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0033] Reference is made to Figures 1-5 The air filtering device 1 according to an embodiment of the present application is described below.

[0034] As shown in Figures 1-5 , the air filtering device 1 according to an embodiment of the present application comprises a housing 10, a drying agent, and a pressure relief pipe 20. The housing 10 is the main body part of the air filtering device 1, and constitutes the overall external structure of the air filtering device 1. The drying agent can play a drying role, and can dry the gas entering the air filtering device 1. The pressure relief pipe 20 can play a pressure relief role, and can discharge the gas.

[0035] As shown in Figures 2-5 , the drying agent is arranged in the housing 10, the pressure relief pipe 20 is arranged in the housing 10, and the drying agent is located at the side of the pressure relief pipe 20. The deflation gas flow passes through the drying agent and then enters the pressure relief pipe 20, and is discharged to the outside of the housing 10. Specifically, when the air filtering device 1 is ready to deflate, the deflation gas flow first passes through the drying agent, taking away the moisture in the drying agent, and then the deflation gas flow continues to pass into the pressure relief pipe 20 and pass through the pressure relief pipe 20, and is discharged to the outside of the housing 10, thereby increasing the service life of the drying agent.

[0036] Therefore, by arranging the pressure relief pipe 20 and arranging the desiccant on the circumferential side of the pressure relief pipe 20, the function of taking away the moisture in the desiccant during the process of air release is realized, and the additional filter shell in the shell 10 can be avoided, so that the overall structure of the air filtering device 1 is more simple, the number of parts is reduced, the integration is high, and the cost is reduced, and the reliability of the air filtering device 1 is improved.

[0037] Of course, as Figure 5 shown, the desiccant is arranged between the shell 10 and the pressure relief pipe 20. It can be understood that the air release gas flow needs to pass between the shell 10 and the pressure relief pipe 20 before entering the pressure relief pipe 20. Arranging the desiccant between the shell 10 and the pressure relief pipe 20 can ensure the contact between the air release gas flow and the desiccant, so as to take away the moisture in the desiccant and increase the service life of the desiccant.

[0038] Further, the desiccant is attached to the inner surface of the shell 10, and the desiccant is attached to the outer surface of the pressure relief pipe 20. That is, the desiccant is arranged between the inner surface of the shell 10 and the outer surface of the pressure relief pipe 20. First, this can make the arrangement of the desiccant more stable and reliable, and is not easy to shift. In addition, the air release gas flow needs to contact the desiccant, which can increase the contact area between the air release gas flow and the desiccant, so as to better take away the moisture in the desiccant and increase the service life of the desiccant. Moreover, by attaching the desiccant to the inner surface of the shell 10 and the outer surface of the pressure relief pipe 20, the amount of desiccant in the air filtering device 1 is greatly increased, and the filtering effect of the air filtering device 1 is improved.

[0039] As shown in Figures 3-5 , the shell 10 is provided with an air inlet 11 and an air outlet 12, and the pressure relief pipe 20 is arranged along the direction from the air inlet 11 to the air outlet 12. The pressure relief pipe 20 is provided with an inlet 21 and an outlet 22, the inlet 21 is arranged adjacent to the air inlet 11, and the outlet 22 is communicated with the outside of the shell 10. The shell 10 is provided with an air inlet 11 and an air outlet 12, and the gas can enter the shell 10 from the air inlet 11 and be discharged to the outside of the shell 10 from the air outlet 12 during the process of inflation and deflation. During the process of air release, the gas can enter the shell 10 from the air outlet 12 and then be discharged to the outside of the shell 10. The pressure relief pipe 20 is provided with an inlet 21 and an outlet 22, and the inlet 21 is arranged adjacent to the air inlet 11. Therefore, when the air release gas needs to enter the pressure relief pipe 20, it needs to flow from the air outlet 12 to the air inlet 11 first, so that the airflow can pass through the desiccant to take away the moisture on the desiccant, and then enter the pressure relief pipe 20 through the inlet 21. The outlet 22 is communicated with the outside of the shell 10, so that the airflow with the moisture of the desiccant is discharged to the outside of the shell 10, increasing the service life of the desiccant.

[0040] It should be noted that, as Figures 2-5As shown, the air filtering device 1 further comprises a first fixing member 30 and a second fixing member 40, the first fixing member 30 is arranged adjacent to the air inlet 11, the second fixing member 40 is arranged in the axial direction of the shell 10 and is spaced apart from the first fixing member 30, and the second fixing member 40 is located on the side of the first fixing member 30 away from the air inlet 11, that is, the second fixing member 40 is arranged adjacent to the air outlet 12, the desiccant is fixed on the side of the first fixing member 30 away from the air inlet 11, specifically, the desiccant is fixed between the first fixing member 30 and the second fixing member 40, and the pressure relief pipe 20 is fixed on the first fixing member 30 and the second fixing member 40.

[0041] The first fixing member 30 and the second fixing member 40 can be provided with a filter therebetween, which can filter the gas entering the shell 10, and the first fixing member 30 and the second fixing member 40 can also have a fixing function. The first fixing member 30 is arranged adjacent to the air inlet 11, and the second fixing member 40 is arranged adjacent to the air outlet 12. The desiccant is fixed between the first fixing member 30 and the second fixing member 40, and the pressure relief pipe 20 is fixed on the first fixing member 30 and the second fixing member 40. In this way, the desiccant and the pressure relief pipe 20 are arranged in the direction from the air inlet 11 to the air outlet 12, and the desiccant is located on the side of the pressure relief pipe 20. In this way, when the air is released, the airflow can quickly enter the pressure relief pipe 20 after taking away the moisture of the desiccant, thereby ensuring the drying effect of the desiccant.

[0042] According to an optional embodiment of the present application, as Figures 3-5 As shown, a drying cavity 80 is defined between the first fixing member 30 and the second fixing member 40 to accommodate the desiccant, and the drying cavity 80 is in communication with the air inlet 11. That is, in the axial direction of the shell 10, a drying cavity 80 can be formed between the first fixing member 30 and the second fixing member 40, and the desiccant is arranged in the drying cavity 80. In addition, the drying cavity 80 needs to be in communication with the air inlet 11, so that the airflow can enter the drying cavity 80 after passing through the air inlet 11, thereby realizing the air charging process and the air releasing process of the air filtering device 1. The first fixing member 30 can be a filter mesh structure or a structure with air holes.

[0043] Optionally, as Figures 3-5As shown, in the axial direction of the shell 10, the first fixing member 30 and the shell 10 define a separation cavity 90, which is in communication with the air inlet 11, the inlet 21 and the drying cavity 80 respectively. In the axial direction of the shell 10, the separation cavity 90 is also arranged between the first fixing member 30 and the shell 10, so that the air inlet 11, the inlet 21 and the drying cavity 80 can be communicated through the separation cavity 90. When the air filtering device 1 is in the inflation process, the airflow enters the separation cavity 90 from the air inlet 11, and then enters the drying cavity 80. When the air filtering device 1 is in the deflation process, the airflow enters the separation cavity 90 from the air inlet 11, and then part of the airflow enters the drying cavity 80, and the other part of the airflow enters the pressure relief pipe 20 through the inlet 21. When the air filtering device 1 is in the deflation process, the airflow enters the separation cavity 90 from the drying cavity 80, and then enters the pressure relief pipe 20 through the inlet 21. In this way, the inflation process, the deflation process and the deflation process of the air filtering device 1 can be realized.

[0044] In addition, as shown in Figure 1 and Figure 2 The air filtering device 1 further comprises a first elastic member 50, the shell 10 comprises a main shell 13 and an end cover 14, the end cover 14 is arranged on the main shell 13, the air inlet 11 is arranged on the end cover 14, and the first elastic member 50 is abutted between the end cover 14 and the first fixing member 30. The end cover 14 can play the role of cover, and the end cover 14 is covered on the main shell 13, so that the main shell 13 can be sealed, and the air inlet 11 is arranged on the end cover 14, so that the airflow can enter the main shell 13 from the air inlet 11 on the end cover 14. The first elastic member 50 is abutted between the end cover 14 and the first fixing member 30, and after the end cover 14 is covered on the main shell 13, the end cover 14 will press the first elastic member 50, and the first elastic member 50 will press the first fixing member 30, so that the desiccant can be pressed and fixed between the first fixing member 30 and the second fixing member 40. Of course, the first elastic member 50 can also play the role of elastic buffer, avoiding damage to the desiccant when pressing the desiccant.

[0045] Specifically, as shown in Figures 1-5As shown, the housing 10 further comprises a mounting tube 15 and a back gas tube 16, the outlet 22 selectively communicates with the mounting tube 15, the back gas tube 16 communicates with the mounting tube 15, and the back gas tube 80 communicates with the outside of the housing 10. The mounting tube 15 mainly functions as mounting and venting, the back gas tube 80 communicates with the outside of the housing 10, so that the back gas tube 16 can function as discharging gas from the housing 10. The outlet 22 selectively communicates with the mounting tube 15, and the back gas tube 16 communicates with the mounting tube 15, that is, when the air filtering device 1 is in the charging process, the outlet 22 does not communicate with the mounting tube 15, so that the gas in the housing 10 cannot be discharged through the mounting tube 15 and the back gas tube 16, when the air filtering device 1 is in the discharging process and the releasing process, the outlet 22 communicates with the mounting tube 15, so that the gas in the housing 10 can be discharged through the mounting tube 15 and the back gas tube 16.

[0046] According to an optional embodiment of the present application, as Figures 2-5 As shown, the air filtering device 1 further comprises a pressure relief valve 60, the pressure relief valve 60 comprises a first sealing member 65, the first sealing member 65 is fixed in the mounting tube 15, and the first sealing member 65 divides the mounting tube 15 into a first cavity 160 and a second cavity 161, the first cavity 160 communicates with the back gas tube 16, and the outlet 22 selectively communicates with the first cavity 160. The first sealing member 65 is fixed in the mounting tube 15, so that the first sealing member 65 can divide the cavity in the mounting tube 15 into the first cavity 160 and the second cavity 161, the first cavity 160 communicates with the back gas tube 16, when the air filtering device 1 is in the charging process, the outlet 22 does not communicate with the first cavity 160, when the air filtering device 1 is in the discharging and releasing processes, the outlet 22 communicates with the first cavity 160.

[0047] It should be noted that the first sealing member 65 can function as sealing, by using the first sealing member 65 for division, so that the first sealing member 65 can seal between the first cavity 160 and the second cavity 161, so as to avoid the flow of gas between the first cavity 160 and the second cavity 161, thereby ensuring the effectiveness and reliability of the pressure relief valve 60.

[0048] Optionally, as Figures 2-5As shown, the pressure relief valve 60 further comprises a first valve core 61 and a second valve core 62, the first valve core 61 is connected with the second valve core 62, the first valve core 61 selectively blocks the outlet 22, and the second valve core 62 is movably arranged in the second cavity 161. The first valve core 61 can play a blocking role, when the air filtering device 1 is in the charging process, the first valve core 61 blocks the outlet 22, and when the air filtering device 1 is in the deflation and air release process, the first valve core 61 moves away from the outlet 22. Since the first valve core 61 is fixedly connected with the second valve core 62, when the first valve core 61 moves away from the outlet 22, the first valve core 61 and the second valve core 62 move at the same time. Further, the first valve core 61 moves in the first cavity 160, and the second valve core 62 moves in the second cavity 161.

[0049] In addition, as Figures 3-5 shown, the housing 10 is further provided with an exhaust port 17, the exhaust port 17 is in communication with the air outlet 12, and the second valve core 62 and the first sealing element 65 define an air inlet cavity 162 therebetween. The housing 10 is provided with a connecting channel 18, one end of the connecting channel 18 is in communication with the air inlet cavity 162, and the other end of the connecting channel 18 is connected between the air outlet 12 and the exhaust port 17. The housing 10 is further provided with the exhaust port 17, and the exhaust port 17 is in communication with the air outlet 12, so that the airflow can flow between the exhaust port 17 and the air outlet 12. A certain sealing space is left between the second valve core 62 and the first sealing element 65, which is the air inlet cavity 162. One end of the connecting channel 18 is in communication with the air inlet cavity 162, and the other end of the connecting channel 18 is connected between the air outlet 12 and the exhaust port 17. When the air filtering device 1 is in the air release process, the airflow can flow from the exhaust port 17 into the air inlet cavity 162. Since the air pressure in the air inlet cavity 162 increases, the air pressure will push the second valve core 62 to move away from the first sealing element 65. Since the second valve core 62 is connected with the first valve core 61, the second valve core 62 will drive the first valve core 61 to move away from the outlet 22, so that the outlet 22 is in communication with the first cavity 160. The airflow containing the moisture of the desiccant can be discharged to the outside of the housing 10.

[0050] Of course, as Figures 1-5 shown, the air filtering device 1 further comprises a control valve 70, the control valve 70 is arranged in the connecting channel 18 to control the communication between the air inlet cavity 162 and the exhaust port 17. The control valve 70 can play a control role. The control valve 70 is arranged in the connecting channel 18, and when the air filtering device 1 is in the charging and deflation process, the control valve 70 disconnects the communication between the air inlet cavity 162 and the exhaust port 17, so that the airflow cannot flow from the exhaust port 17 into the air inlet cavity 162. When the air filtering device 1 is in the air release process, the control valve 70 connects the air inlet cavity 162 and the exhaust port 17, so that the airflow can flow from the exhaust port 17 into the air inlet cavity 162. The control valve 70 can be an electromagnetic valve.

[0051] Further, as shown in Figures 2-5 the second valve core 62 and the adjusting cover 64, and the second elastic member 63 is connected between the second valve core 62 and the adjusting cover 64. The second elastic member 63 can provide an elastic force, the adjusting cover 64 can play a role of a cover, and the adjusting cover 64 is arranged on the mounting pipe 15, so that the adjusting cover 64 can play a certain sealing role on the mounting pipe 15. The adjusting cover 64 is arranged opposite to the second valve core 62, and the second elastic member 63 is connected between the second valve core 62 and the adjusting cover 64. When the outlet 22 needs to be communicated with the first cavity 160, the second valve core 62 moves towards the adjusting cover 64, the second valve core 62 will press the second elastic member 63, the second elastic member 63 is pressed to store energy, when the outlet 22 does not need to be communicated with the first cavity 160, the force in the direction of the second elastic member 63 of the first valve core 61 and the second valve core 62 is removed, at this time, the second elastic member 63 provides a reverse elastic force of the second valve core 62, pushes the second valve core 62 and the first valve core 61 to move, and restores to the original position, so as to realize the automatic recovery function of the pressure relief valve 60.

[0052] In addition, as shown in Figure 2 the second valve core 62 and the adjusting cover 64, and the second elastic member 63 is connected between the second valve core 62 and the adjusting cover 64. The second elastic member 63 can provide an elastic force, the adjusting cover 64 can play a role of a cover, and the adjusting cover 64 is arranged on the mounting pipe 15, so that the adjusting cover 64 can play a certain sealing role on the mounting pipe 15. The adjusting cover 64 is arranged opposite to the second valve core 62, and the second elastic member 63 is connected between the second valve core 62 and the adjusting cover 64. When the outlet 22 needs to be communicated with the first cavity 160, the second valve core 62 moves towards the adjusting cover 64, the second valve core 62 will press the second elastic member 63, the second elastic member 63 is pressed to store energy, when the outlet 22 does not need to be communicated with the first cavity 160, the force in the direction of the second elastic member 63 of the first valve core 61 and the second valve core 62 is removed, at this time, the second elastic member 63 provides a reverse elastic force of the second valve core 62, pushes the second valve core 62 and the first valve core 61 to move, and restores to the original position, so as to realize the automatic recovery function of the pressure relief valve 60.

[0053] The working principles of the air filtering device 1 in the charging process, the discharging process and the air discharging process will be described in detail below: As shown in Figure 3 the charging process: when the air pump charges the air filtering device 1, the communication between the air outlet 17 and the air outlet 12 and the air inlet cavity 162 is disconnected through the adjusting control valve 70, at this time, the pressure relief valve 60 is in a normally closed state under the elastic force of the second elastic member 63, and the high-pressure gas from the air pump is filled into the air suspension system through the air outlet 12 and the air outlet 17 after being filtered and dried by the filter element.

[0054] As shown in Figure 4As shown, the venting process is as follows: When the exhaust pressure is too high and exceeds the safe pressure range set by the pressure relief valve 60, the force of the high-pressure gas on the first valve core 61 of the pressure relief valve 60 exceeds the elastic force provided by the second elastic element 63 to the second valve core 62. The second elastic element 63 is compressed, and the outlet 22 is connected to the first cavity 160. The high-pressure gas from the air suspension system is discharged into the air pump intake cavity after passing through the filter element, pressure relief pipe 20, first cavity 160 and return pipe 16, and then discharged into the outside atmosphere through the air pump intake pipe.

[0055] like Figure 5 As shown, the deflation process is as follows: When the vehicle's air suspension system deflates, the control valve 70 is adjusted to connect the intake chamber 162 and the exhaust port 17. High-pressure gas enters the intake chamber 162, and the force exerted on the valve core of the pressure relief valve 60 exceeds the elastic force of the second elastic element 63. The outlet 22 is connected to the first chamber 160. The high-pressure gas from the air suspension system passes through the filter element, the pressure relief pipe 20, the first chamber 160, and the return pipe 16 before being discharged into the air pump intake chamber, and then discharged into the outside atmosphere through the air pump intake pipe. During the deflation process, the air filtration device 1 carries the moisture in the desiccant into the outside air through the reverse flow of gas in the filter element (relative to the flow direction of gas during inflation), extending the service life of the desiccant.

[0056] In summary, the air filtration device 1 can integrate functions such as air filtration and drying, air circuit control, and overpressure protection into one unit, reducing the number of parts in the vehicle's air suspension system, making it more convenient to use, simple in structure, and highly reliable.

[0057] An air supply device according to an embodiment of the present invention includes: the air filtration device 1 described in the above embodiments.

[0058] An air suspension system according to an embodiment of the present invention includes: the air supply device described in the above embodiments.

[0059] The vehicle according to an embodiment of the present invention includes: the air suspension system described in the above embodiments.

[0060] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0061] In the description of the application, "a first feature", "a second feature" can include one or more of the features. In the description of the application, the meaning of "a plurality" is two or more. In the description of the application, "over" or "under" a second feature of a first feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. In the description of the application, "over", "above" and "on" a second feature of a first feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is horizontally higher than the second feature.

[0062] In the description of the application, the description referring to the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the description of the application, the illustrative description of the above terms does not necessarily mean the same embodiment or example.

[0063] Although the embodiments of the application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the application, and the scope of the application is defined by the claims and their equivalents.

Claims

1. An air filtration device (1), characterized in that, include: Shell (10); A desiccant is disposed inside the housing (10); Pressure relief pipe (20) is disposed inside the housing (10). The desiccant is located on the periphery of the pressure relief pipe (20). The venting gas flows through the desiccant and enters the pressure relief pipe (20), and is discharged to the outside of the housing (10).

2. The air filtration device (1) according to claim 1, characterized in that, The desiccant is disposed between the housing (10) and the pressure relief pipe (20).

3. The air filtration device (1) according to claim 2, characterized in that, The desiccant is attached to the inner surface of the housing (10) and the desiccant is attached to the outer surface of the pressure relief pipe (20).

4. The air filtration device (1) according to claim 1, characterized in that, The housing (10) is provided with an air inlet (11), and the pressure relief pipe (20) is provided with an inlet (21) and an outlet (22). The inlet (21) is located adjacent to the air inlet (11), and the outlet (22) is connected to the outside of the housing (10).

5. The air filtration device (1) according to claim 4, characterized in that, Also includes: A first fixing member (30) is disposed adjacent to the air inlet (11), and the desiccant is fixed to the side of the first fixing member (30) away from the air inlet (11).

6. The air filtration device (1) according to claim 5, characterized in that, Also includes: The second fixing member (40) is arranged at a distance from the first fixing member (30) in the axial direction of the housing (10), and the second fixing member (40) is located on the side of the first fixing member (30) away from the air inlet (11), and the desiccant is fixed between the first fixing member (30) and the second fixing member (40).

7. The air filtration device (1) according to claim 6, characterized in that, The pressure relief pipe (20) is fixed to the first fixing member (30) and the second fixing member (40).

8. The air filtration device (1) according to claim 6, characterized in that, The first fixing member (30) and the second fixing member (40) define a drying cavity (80) for containing the desiccant, and the drying cavity (80) is connected to the air inlet (11).

9. The air filtration device (1) according to claim 6, characterized in that, In the axial direction of the housing (10), the first fixing member (30) and the housing (10) define a separation cavity (90), which is connected to the air inlet (11), the inlet (21) and the drying cavity (80) respectively.

10. The air filtration device (1) according to claim 5, characterized in that, The housing (10) includes a main housing (13) and an end cap (14), the end cap (14) being disposed on the main housing (13), and the air inlet (11) being disposed on the end cap (14).

11. The air filtration device (1) according to claim 10, characterized in that, Also includes: The first elastic element (50) abuts between the end cap (14) and the first fixing element (30).

12. The air filtration device (1) according to claim 4, characterized in that, The housing (10) further includes an installation pipe (15) and a return pipe (16), wherein the outlet (22) is selectively connected to the installation pipe (15), the return pipe (16) is connected to the installation pipe (15), and the return pipe (16) is connected to the outside of the housing (10).

13. The air filtration device (1) according to claim 12, characterized in that, Also includes: The pressure relief valve (60) includes: a first seal (65) fixed inside the mounting tube (15), and the first seal (65) divides the inside of the mounting tube (15) into a first cavity (160) and a second cavity (161), the first cavity (160) being connected to the return air pipe (16), and the outlet (22) being selectively connected to the first cavity (160).

14. The air filtration device (1) according to claim 13, characterized in that, The pressure relief valve (60) further includes: a first valve core (61) and a second valve core (62), wherein the first valve core (61) is connected to the second valve core (62), the first valve core (61) selectively blocks the outlet (22), and the second valve core (62) is movably disposed in the second cavity (161).

15. The air filtration device (1) according to claim 14, characterized in that, The housing (10) is also provided with an air outlet (12) and an exhaust outlet (17). The exhaust outlet (17) is connected to the air outlet (12). An air inlet chamber (162) is defined between the second valve core (62) and the first sealing element (65). The housing (10) is provided with a connecting channel (18). One end of the connecting channel (18) is connected to the air inlet chamber (162), and the other end of the connecting channel (18) is connected between the air outlet (12) and the exhaust outlet (17).

16. The air filtration device (1) according to claim 15, characterized in that, Also includes: A control valve (70) is disposed in the connection channel (18) to control the communication between the air intake chamber (162) and the exhaust port (17).

17. The air filtration device (1) according to claim 14, characterized in that, The pressure relief valve (60) further includes a second elastic element (63) and an adjustment cover (64). The adjustment cover (64) is disposed on the mounting tube (15) and is disposed opposite to the second valve core (62). The second elastic element (63) is connected between the second valve core (62) and the adjustment cover (64).

18. The air filtration device (1) according to claim 14, characterized in that, The pressure relief valve (60) further includes a second seal (66), which is sealed between the second valve core (62) and the inner wall of the mounting tube (15).

19. An air supply device, characterized in that, include: The air filtration device (1) according to any one of claims 1-18.

20. An air suspension system, characterized in that, include: The air supply device as described in claim 19.

21. A vehicle, characterized in that, include: The air suspension system as described in claim 20.

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