Filtering assembly
The compact filtering assembly for air suspension systems addresses size and cost issues by integrating a bidirectional valve system and desiccant unit to filter particles and moisture efficiently, improving vehicle stability and performance.
Patent Information
- Application Number
- PCT/CN2024/109359
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2026-02-05
Smart Images

Figure CN2024109359_05022026_PF_FP_ABST
Abstract
Description
Filtering AssemblyTechnical Field
[0001] Embodiments relate to a filtering assembly, and more specifically a filtering assembly for an air intake end of an air suspension system.Background Art
[0002] In the field of new energy vehicles, air suspension systems have been given more and more attention. First of all, the air suspension system is mainly composed of an air spring and a shock absorber, and changes height, damping and shock absorption effect of the vehicle by adjusting inflation and deflation of the air spring, so as to improve driving comfort and handling stability of the vehicle.
[0003] Since new energy vehicles use batteries as energy storage devices, the weight of the whole vehicle is unevenly distributed, which has unfavorable impact on driving stability of the vehicle. The air suspension system can adjust the height and damping effect, so that the vehicle can maintain a stable driving attitude under different load conditions, and effectively improve the driving comfort of new energy vehicles.
[0004] Cruising range of new energy vehicles is one of the most concerned issues for consumers. The life of the battery directly affects the mileage of the vehicle. The air suspension system can reduce the shock and vibration generated by the vehicle during driving by optimizing the vehicle height and shock absorption effect, thereby reducing the damage to the battery and prolonging its service life. In addition, by reducing the vehicle height, the air resistance can also be reduced, and the range of new energy vehicles can be improved.
[0005] With the continuous development of new energy vehicle technology, more and more high-performance vehicles have emerged. These vehicles require stable handling at high speeds. The air suspension system can improve the handling stability of the vehicle by adjusting the damping effect and height, so that the driver can control the vehicle more stably at high speeds.
[0006] Different drivers have different needs for driving experience of their vehicles. The air suspension system can be adjusted in height and damping effect to meet individual needs of the driver. For example, some drivers want to lower vehicle body at high speeds to improve stability; others want to raise the vehicle body when driving in urban areas to make it easier to pass low road obstacles. The air suspension system can be flexibly adapted to these individual requirements.
[0007] To sum up, the air suspension system plays an extremely important role in the field of new energy vehicles. Most of air intake end sealing assemblies of compressors of existing air suspension systems have segmented structure, which are connected in series by hoses. This design usually has large overall size, is relatively space-consuming in layout, and is relatively expensive to manufacture.
[0008] To this end, it is desirable to develop an air intake end filtering assembly of a compressor of an air suspension system, which has small overall size, is relatively space-saving in layout, and is relatively cheap to manufacture.Summary
[0009] An object of the present disclosure is to provide a filtering assembly, which has small overall size, is relatively space-saving in layout, and is relatively cheap to manufacture.
[0010] In one aspect, a filtering assembly is provided. The filtering assembly comprises an upper housing, a lower housing securable to the upper housing, a filter sealing plate securable to the upper housing to define a filter space therebetween, a filter element disposed within the filter space, a bidirectional valve plate securable to the lower housing, the bidirectional valve plate comprising a first mounting hole, a second mounting hole, at least one first air hole around the first mounting hole, and at least one second air hole around the second mounting hole, a first umbrella valve mounted to the first mounting hole in a first mounting direction, and configured to selectively open and close the at least one first air hole, and a second umbrella valve mounted to the second mounting hole in a second mounting direction opposite to the first mounting direction, and configured to selectively open and close the at least one second air hole.
[0011] The filtering assembly may further comprise a sound absorbing medium disposed between the filter sealing plate and the bidirectional valve plate.
[0012] The filtering assembly may further comprise a desiccant unit disposed in the lower housing, a desiccant sealing cover disposed on top of the desiccant unit and comprising a plurality of vent holes extending through the desiccant sealing cover in an axial direction of the filtering assembly, and a compression spring disposed between the bidirectional valve plate and the desiccant sealing cover.
[0013] The filtering assembly may further comprise a first filter pad disposed between the desiccant sealing cover and the desiccant unit.
[0014] The filtering assembly may further comprise a second filter pad disposed between an end of the desiccant unit opposite to the first filter pad and the lower housing.
[0015] The filter sealing plate may comprise a filter element mounting boss configured to receive a corresponding recess of the filter element, the filter element mounting boss having an annular cross-section with an outer diameter smaller than that of the filter sealing plate, extending in an axial direction of the filtering assembly, and defining a central opening for air flow therethough.
[0016] The filter sealing plate may further comprise a sealing plate welding rib extending around an outer circumference of the filter sealing plate in the same direction as the filter element mounting boss, the sealing plate welding rib being configured to be welded to the upper housing to secure the filter sealing plate to the upper housing.
[0017] The filter sealing plate may further comprise a plurality of sealing plate mounting bosses distributed around an outer circumference of the filter sealing plate and extending radially outward from the outer circumference of the filter sealing plate, and the upper housing may comprise a plurality of sealing plate mounting buckles equal in number to the plurality of sealing plate mounting bosses and aligned circumferentially with the plurality of sealing plate mounting bosses, the plurality of sealing plate mounting buckles being configured to receive the plurality of sealing plate mounting bosses, respectively, to secure the filter sealing plate to the upper housing.
[0018] The bidirectional valve plate may further comprise a first valve accommodating recess receiving a first umbrella portion of the first umbrella valve, and a second valve accommodating recess receiving a second umbrella portion of the second umbrella valve.
[0019] The bidirectional valve plate may further comprise a valve plate welding rib extending around an outer circumference of the bidirectional valve plate in an axial direction of the filtering assembly, the valve plate welding rib being configured to be welded to the lower housing to secure the bidirectional valve plate to the lower housing.
[0020] The bidirectional valve plate may further comprise a plurality of valve plate mounting bosses distributed around an outer circumference of the bidirectional valve plate and extending radially outward from the outer circumference of the bidirectional valve plate, and the lower housing may comprise a plurality of valve plate mounting buckles equal in number to the plurality of valve plate mounting bosses and aligned circumferentially with the plurality of valve plate mounting bosses, the plurality of valve plate mounting buckles being configured to receive the plurality of valve plate mounting bosses, respectively, to secure the bidirectional valve plate to the lower housing.
[0021] The bidirectional valve plate may further comprise a plurality of spring seats each extending in an axial direction of the filtering assembly, the plurality of spring seats being configured to hold the compression spring.
[0022] By means of the sound absorbing medium, noise during air intake mode and exhaust mode can be greatly attenuated.
[0023] By means of the desiccant unit, the moisture in air pumped in during air intake mode will be removed, so as to prevent damage of the air suspension system.
[0024] By means of the compression spring, the position of the desiccant sealing cover can be adjusted freely, so that the volume expansion caused by heat adsorption of desiccant can be released, so as to avoid damaging the lower housing. At the same time, the compression spring prevents excessive movement space for the desiccant due to shaking, desiccant volume decrease caused by temperature reduction, and so on, thereby preventing wear of the desiccant and generation of fine desiccant powder.
[0025] By means of the first filter pad and / or optional second filter pad, fine desiccant powder will be prevented from entering downstream components, so as to avoid wearing and clogging thereof.
[0026] By means of the design of bidirectional valve, when the filtering assembly is in neither air intake mode nor exhaust mode, both the first umbrella valve and the second umbrella valve are closed, thus the desiccant unit is in an isolated state from the outer environment, thereby lengthening the useful life of the desiccant unit.
[0027] Further areas of applicability of the present disclosure will become apparent from the detailed description, the claims and the drawings. The detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the disclosure.Brief Description of Drawings
[0028] The present disclosure will become more fully understood from the detailed description and the accompanying drawings.
[0029] Fig. 1 is a schematic cross-sectional view of a portion of a filtering assembly according to embodiments.
[0030] Fig. 2 is a schematic top view of a bidirectional valve plate of the filtering assembly according to embodiments, wherein the bidirectional valve plate can be secured to a lower housing by snapping engagement.
[0031] Fig. 3 is a schematic bottom view of a filter sealing plate of the filtering assembly according to embodiments, wherein the filter sealing plate can be secured to an upper housing by snapping engagement.
[0032] Fig. 4 is a schematic bottom perspective view of the bidirectional valve plate of Fig. 2.
[0033] Fig. 5 is a schematic top perspective view of the bidirectional valve plate of Fig. 2.
[0034] Fig. 6 is a schematic bottom perspective view of the bidirectional valve plate of Fig. 2, wherein a first umbrella valve and a second umbrella valve are mounted to the bidirectional valve plate.
[0035] Fig. 7 is a schematic top perspective view of the bidirectional valve plate of Fig. 2, wherein a first umbrella valve and a second umbrella valve are mounted to the bidirectional valve plate.
[0036] Fig. 8 is a schematic bottom perspective view of the filter sealing plate of Fig. 3.
[0037] Fig. 9 is a schematic top perspective view of the filter sealing plate of Fig. 3.
[0038] Fig. 10 is a schematic perspective view of a first umbrella valve of the filtering assembly according to embodiments.
[0039] Fig. 11 is a schematic perspective view of a second umbrella valve of the filtering assembly according to embodiments.
[0040] Fig. 12 is a schematic cross-sectional view of a portion of a filtering assembly according to other embodiments.
[0041] Fig. 13 is a schematic bottom perspective view of the bidirectional valve plate of the filtering assembly of Fig. 12.
[0042] Fig. 14 is a schematic top perspective view of the bidirectional valve plate of the filtering assembly of Fig. 12.
[0043] Fig. 15 is a schematic bottom perspective view of the bidirectional valve plate of the filtering assembly of Fig. 12, wherein a first umbrella valve and a second umbrella valve are mounted to the bidirectional valve plate.
[0044] Fig. 16 is a schematic top perspective view of the bidirectional valve plate of the filtering assembly of Fig. 12, wherein a first umbrella valve and a second umbrella valve are mounted to the bidirectional valve plate.
[0045] Fig. 17 is a schematic bottom perspective view of the filter sealing plate of the filtering assembly of Fig. 12.
[0046] Fig. 18 is a schematic top perspective view of the filter sealing plate of the filtering assembly of Fig. 12.
[0047] Fig. 19 is a schematic cross-sectional view of a portion of the filtering assembly, showing air flow path through the filtering assembly when the filtering assembly is in air intake mode.
[0048] Fig. 20 is a schematic cross-sectional view of a portion of the filtering assembly, showing air flow path through the filtering assembly when the filtering assembly is in exhaust mode.Description of Embodiments
[0049] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features. Additionally, the drawings are generally schematic and not necessarily to scale. Some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present disclosure.
[0050] Certain terminology may be used in the following description for the purpose of reference only, and thus are not intended to be limiting. For example, terms such as “above” and “below” refer to directions in the drawings to which reference is made. Terms such as “front” , “back” , “fore” , “aft” , “left” , “right” , “rear” , “side” , “upward” , “downward” , “horizontal” , “vertical” , “top” , and “bottom” , etc., describe the orientation and / or location of portions of the components or elements within a consistent but arbitrary frame of reference, which is made clear by reference to the text and the associated drawings describing the components or elements under discussion.
[0051] Furthermore, terms such as “first” , “second” , “third” , and so on may be used to describe separate components. Such terminologies are used descriptively for the figures, and do not represent limitations on the scope of the disclosure, as defined by the appended claims.
[0052] Referring now to the drawings, wherein like reference numbers refer to like features throughout the several views. Fig. 1 is a schematic cross-sectional view of a portion of a filtering assembly 100 according to embodiments. According to one example, the filtering assembly 100 may be used in an air intake end of a compressor of an air suspension system. As understood by those skilled in the art, the filtering assembly 100 may be applied to any other suitable applications, without departing the scope of the disclosure.
[0053] According to one example, the filtering assembly 100 may comprise: an upper housing 1; a lower housing 2 secured to the upper housing 1; a filter sealing plate 4 secured to the upper housing 1 to define a filter space 61 therebetween; a filter element 3 disposed within the filter space 61; a bidirectional valve plate 5 secured to the lower housing 2; a first umbrella valve 7 and a second umbrella valve 57 mounted to the bidirectional valve plate 5 in opposite directions. The filter element 3 is configured to filter out particles from air pumped in during air intake mode, so as to prevent damage of the air suspension system.
[0054] According to one example, the lower housing 2 may be provided with mounting threads 12 at outer circumference of the upper end of the lower housing 2. Thus, the lower housing 2 can be secured to the upper housing 1 by thread engagement of the mount threads 12 of the lower housing 2 and corresponding threads (not labeled) of the upper housing 1. As understood by those skilled in the art, the lower housing 2 can be secured to the upper housing 1 by any other suitable method, without departing the scope of the disclosure.
[0055] According to one example, the filtering assembly 100 may further comprise a sound absorbing medium 6 disposed between the filter sealing plate 4 and the bidirectional valve plate 5. The sound absorbing medium 6 is configured to attenuate noise during air intake mode and exhaust mode. According to one example, the sound absorbing medium 6 may be formed from sponge. As understood by those skilled in the art, the sound absorbing medium 6 may be formed from any other suitable material, without departing the scope of the disclosure. According to one example, the space between the filter sealing plate 4 and the bidirectional valve plate 5 and the material of sound absorbing medium 6 may be adjusted for different silencing requirements.
[0056] According to one example, the filtering assembly 100 may further comprise a desiccant unit 11 disposed in the lower housing 2, and a desiccant sealing cover 9 disposed on top of the desiccant unit 11. The desiccant sealing cover 9 is provided with a plurality of vent holes 91 extending through the desiccant sealing cover 9 in an axial direction of the filtering assembly 100. The desiccant unit 11 is configured to absorb the moisture in air pumped in during air intake mode, so as to prevent damage of the air suspension system.
[0057] According to one example, the filtering assembly 100 may further comprise a compression spring 8 disposed between the bidirectional valve plate 5 and the desiccant sealing cover 9. The compression spring 8 is configured to apply pressure to desiccant sealing cover 9 against the bidirectional valve plate 5, to facilitate the desiccant sealing cover 9 to keep desiccant of the desiccant unit 11 in a pre-pressed state, so as to avoid excessive movement space for the desiccant due to shaking, desiccant volume decrease caused by temperature reduction, and so on, thereby preventing wear of the desiccant and generation of fine desiccant powder. At the same time, due to the existence of the compression spring 8, the position of the desiccant sealing cover 9 can be adjusted freely, so that the volume expansion caused by heat adsorption of desiccant 11 can be released, so as to avoid damaging the lower housing 2.
[0058] According to one example, the filtering assembly 100 may further comprise a first filter pad 10 disposed between the desiccant sealing cover 9 and the desiccant unit 11. The first filter pad 10 is configured to prevent fine desiccant powder from entering upstream components such as sound absorbing medium 6 and the bidirectional valve plate 5, so as to avoid wearing and clogging thereof.
[0059] According to one example, the filtering assembly 100 may further comprise a second filter pad (not shown) disposed between an end of the desiccant unit 11 opposite to the first filter pad 10 and the lower housing 2. The second filter pad is configured to prevent fine desiccant powder from entering downstream components, so as to avoid wearing and clogging thereof.
[0060] Fig. 2 is a schematic top view of a bidirectional valve plate 5 of the filtering assembly 100 according to embodiments, wherein the bidirectional valve plate 5 can be secured to a lower housing 2 by snapping engagement. Fig. 4 is a schematic bottom perspective view of the bidirectional valve plate 5 of Fig. 2. Fig. 5 is a schematic top perspective view of the bidirectional valve plate 5 of Fig. 2. Fig. 6 is a schematic bottom perspective view of the bidirectional valve plate 5 of Fig. 2, wherein a first umbrella valve 7 and a second umbrella valve 57 are mounted to the bidirectional valve plate 5. Fig. 7 is a schematic top perspective view of the bidirectional valve plate 5 of Fig. 2, wherein a first umbrella valve 7 and a second umbrella valve 57 are mounted to the bidirectional valve plate 5. Fig. 10 is a schematic perspective view of a first umbrella valve 7 of the filtering assembly 100 according to embodiments. Fig. 11 is a schematic perspective view of a second umbrella valve 57 of the filtering assembly 100 according to embodiments.
[0061] According to one example, the bidirectional valve plate 5 may comprise a first mounting hole 22, a second mounting hole 52, a first valve accommodating recess 54 for receiving a first umbrella portion 55 of the first umbrella valve 7, a second valve accommodating recess 53 for receiving a second umbrella portion 56 of the second umbrella valve 57, at least one first air hole 21 around the first mounting hole 22, and at least one second air hole 51 around the second mounting hole 52. A first umbrella valve 7 is mounted to the first mounting hole 22 in a first mounting direction (i.e., vertically upward in Fig. 1) , and configured to selectively open and close the at least one first air hole 21. A second umbrella valve 57 is mounted to the second mounting hole 52 in a second mounting direction (i.e., vertically downward in Fig. 1) opposite to the first mounting direction, and configured to selectively open and close the at least one second air hole 51.
[0062] According to one example, the first umbrella valve 7 may comprise a first umbrella portion 55 and a first mounting portion 23. The first umbrella portion 55 is seated in the first valve accommodating recess 54 and is configured to selectively open and close the at least one first air hole 21. The first mounting portion 23 is configured to be fit into the first mounting hole 22 of the bidirectional valve plate 5. As understood by those skilled in the art, the first umbrella valve 7 may utilize any other suitable structure, without departing the scope of the disclosure.
[0063] According to one example, the second umbrella valve 57 may comprise a second umbrella portion 56 and a second mounting portion 58. The second umbrella portion 56 is seated in the second valve accommodating recess 53 and is configured to selectively open and close the at least one second air hole 51. The second mounting portion 58 is configured to be fit into the second mounting hole 52 of the bidirectional valve plate 5. As understood by those skilled in the art, the second umbrella valve 57 may utilize any other suitable structure, without departing the scope of the disclosure.
[0064] According to one example, the first umbrella valve 7 and the second umbrella valve 57 hav e the same structure. As understood by those skilled in the art, the first umbrella valve 7 and the second umbrella valve 57 may have different structure, as long as the first umbrella valve 7 and the second umbrella valve 57can selectively open and close the at least one first air hole 21 and the at least one second air hole 51,respectively, without departing the scope of the disclosure.
[0065] According to one example, the bidirectional valve plate 5 may be provided with a plurality of spring seats 20. Each spring seat 20 extends in an axial direction of the filtering assembly 100. The plurality of spring seats 20 are located on an imaginary circle which has a diameter equal to the inner diameter of the compression spring 8, and are configured to hold the compression spring 8. According to one example, the bidirectional valve plate 5 may be provided with four spring seats 20. As understood by those skilled in the art, the bidirectional valve plate 5 may be provided with any other suitable number of spring seats 20, such as 3, 5, 6, etc., without departing the scope of the disclosure.
[0066] According to one example, the bidirectional valve plate 5 may be provided with a plurality of valve plate mounting bosses 16 distributed around outer circumference of the bidirectional valve plate 5 and extending radially outward from the outer circumference of the bidirectional valve plate 5. According to one example, the lower housing 2 is provided with a plurality of valve plate mounting buckles 15 which are equal in number to the plurality of valve plate mounting bosses 16 and which are aligned circumferentially with the plurality of valve plate mounting bosses 16. The plurality of valve plate mounting buckles 15 are configured to receive respective one of the plurality of valve plate mounting bosses 16, so as to secure the bidirectional valve plate 5 to the lower housing 2. When the plurality of valve plate mounting bosses 16 are positioned in respective valve plate mounting buckles 15 and the bidirectional valve plate 5 is rotated in a locked direction A (clockwise) relative to the lower housing 2, the bidirectional valve plate 5 is secured to the lower housing 2. If the bidirectional valve plate 5 is to be removed from the lower housing 2, one only need to rotate the bidirectional valve plate 5 in an unlocked direction A (anticlockwise) relative to the lower housing 2. Snapping engagement of the valve plate mounting buckles 15 and the valve plate mounting bosses 16 provides a cheap and easy way to secure the bidirectional valve plate 5 to the lower housing 2.
[0067] According to one example, the bidirectional valve plate 5 may be provided with four valve plate mounting bosses 16 and the lower housing 2 may be provided with four valve plate mounting buckles 15. As understood by those skilled in the art, the number of the valve plate mounting bosses 16 and the valve plate mounting buckles 15 may be any other suitable number, such as 2, 3, 5, 6, etc., without departing the scope of the disclosure.
[0068] Fig. 3 is a schematic bottom view of a filter sealing plate 4 of the filtering assembly 100 according to embodiments, wherein the filter sealing plate 4 can be secured to the upper housing 1 by snapping engagement. Fig. 8 is a schematic bottom perspective view of the filter sealing plate 4 of Fig. 3. Fig. 9 is a schematic top perspective view of the filter sealing plate 4 of Fig. 3.
[0069] According to one example, the filter sealing plate 4may be provided with a plurality of sealing plate mounting bosses 14distributed around outer circumference of the filter sealing plate 4 and extending radially outward from the outer circumference of the filter sealing plate 4. According to one example, the upper housing 1 is provided with a plurality of sealing plate mounting buckles 13 which are equal in number to the plurality of sealing plate mounting bosses 14 and which are aligned circumferentially with the plurality of sealing plate mounting bosses 14. The plurality of sealing plate mounting buckles 13 are configured to receive respective one of the plurality of sealing plate mounting bosses 14, so as to secure the filter sealing plate 4 to the upper housing 1. When the plurality of sealing plate mounting bosses 14 are positioned in respective sealing plate mounting buckles 13 and the filter sealing plate 4 is rotated in a locked direction A (clockwise) relative to the upper housing 1, the filter sealing plate 4 is secured to the upper housing 1. If the filter sealing plate 4 is to be removed from the upper housing 1, one only need to rotate the filter sealing plate 4 in an unlocked direction A (anticlockwise) relative to the upper housing 1. Snapping engagement of the sealing plate mounting bosses 14 and sealing plate mounting buckles 13 provides a cheap and easy way to secure the filter sealing plate 4 to the upper housing 1.
[0070] According to one example, the filter sealing plate 4 may be provided with four sealing plate mounting bosses 14 and the upper housing 1 may be provided with four sealing plate mounting buckles 13. As understood by those skilled in the art, the number of the sealing plate mounting bosses 14 and the sealing plate mounting buckles 13 may be any other suitable number, such as 2, 3, 5, 6, etc., without departing the scope of the disclosure.
[0071] According to one example, the filter sealing plate 4 may be provided with a filter element mounting boss 24 for receiving corresponding recess of the filter element 3. According to one example, the filter element mounting boss 24 has an annular cross-section for receiving recess of an annular filter element. As understood by those skilled in the art, the filter element mounting boss 24 may be any other suitable shape for receiving any other suitable shaped filter element, without departing the scope of the disclosure. The filter element mounting boss 24 has an outer diameter smaller than that of the filter sealing plate 4, extends in an axial direction of the filtering assembly 100, and defines a central opening 41 for air flow therethough.
[0072] Fig. 12 is a schematic cross-sectional view of a portion of a filtering assembly 100 according to other embodiments. According to one example, the filtering assembly 100 may comprise: an upper housing 1; a lower housing 2 secured to the upper housing 1; a filter sealing plate 4 secured to the upper housing 1 to define a filter space 61 therebetween; a filter element 3 disposed within the filter space 61; a bidirectional valve plate 5 secured to the lower housing 2; a first umbrella valve 7 and a second umbrella valve 57 mounted to the bidirectional valve plate 5 in opposite directions. The filter element 3 is configured to filter out particles from air pumped in during air intake mode, so as to prevent damage of the air suspension system.
[0073] According to one example, the lower housing 2 may be provided with welding rib 17 extending around outer circumference of the upper end of the lower housing 2. Thus, the lower housing 2 can be secured to the upper housing 1 by welding. According to one example, the lower housing 2 can be secured to the upper housing 1 by ultrasonic soldering. As understood by those skilled in the art, the lower housing 2 can be secured to the upper housing 1 by any other suitable welding method, without departing the scope of the disclosure.
[0074] According to one example, the filtering assembly 100 may further comprise a sound absorbing medium 6 disposed between the filter sealing plate 4 and the bidirectional valve plate 5. The sound absorbing medium 6 is configured to attenuate noise during air intake mode and exhaust mode.
[0075] According to one example, the filtering assembly 100 may further comprise a desiccant unit 11 disposed in the lower housing 2, and a desiccant sealing cover 9 disposed on top of the desiccant unit 11. The desiccant sealing cover 9 is provided with a plurality of vent holes 91 extending through the desiccant sealing cover 9 in an axial direction of the filtering assembly 100. The desiccant unit 11 is configured to absorb the moisture in air pumped in during air intake mode, so as to prevent damage of the air suspension system.
[0076] According to one example, the filtering assembly 100 may further comprise a compression spring 8 disposed between the bidirectional valve plate 5 and the desiccant sealing cover 9. The compression spring 8 is configured to apply pressure to desiccant sealing cover 9 against the bidirectional valve plate 5, to facilitate the desiccant sealing cover 9 to keep desiccant of the desiccant unit 11 in a pre-pressed state, so as to avoid excessive movement space for the desiccant due to shaking, desiccant volume decrease caused by temperature reduction, and so on, thereby preventing wear of the desiccant and generation of fine desiccant powder. At the same time, due to the existence of the compression spring 8, the position of the desiccant sealing cover 9 can be adjusted freely, so that the volume expansion caused by heat adsorption of desiccant 11 can be released, so as to avoid damaging the lower housing 2.
[0077] According to one example, the filtering assembly 100 may further comprise a first filter pad 10 disposed between the desiccant sealing cover 9 and the desiccant unit 11. The first filter pad 10 is configured to prevent fine desiccant powder from entering upstream components such as sound absorbing medium 6 and the bidirectional valve plate 5, so as to avoid wearing and clogging thereof.
[0078] According to one example, the filtering assembly 100 may further comprise a second filter pad (not shown) disposed between an end of the desiccant unit 11 opposite to the first filter pad 10 and the lower housing 2. The second filter pad is configured to prevent fine desiccant powder from entering downstream components, so as to avoid wearing and clogging thereof.
[0079] Fig. 13 is a schematic bottom perspective view of the bidirectional valve plate 5 of the filtering assembly 100 of Fig. 12. Fig. 14 is a schematic top perspective view of the bidirectional valve plate 5 of the filtering assembly 100 of Fig. 12. Fig. 15 is a schematic bottom perspective view of the bidirectional valve plate 5 of the filtering assembly 100 of Fig. 12, wherein a first umbrella valve 7 and a second umbrella valve 57 are mounted to the bidirectional valve plate 5. Fig. 16 is a schematic top perspective view of the bidirectional valve plate 5 of the filtering assembly 100 of Fig. 12, wherein a first umbrella valve 7 and a second umbrella valve 57 are mou nted to the bidirectional valve plate 5.
[0080] According to one example, the bidirectional valve plate 5 may be provided with a valve plate welding rib 18 extending around outer circumference of the bidirectional valve plate 5 in an axial direction of the filtering assembly 100. The valve plate welding rib 18 is configured to be welded to the lower housing 2, so as to secure the bidirectional valve plate 5 to the lower housing 2. According to one example, the bidirectional valve plate 5 can be secured to the lower housing 2 by ultrasonic soldering. As understood by those skilled in the art, the bidirectional valve plate 5 can be secured to the lower housing 2 by any other suitable welding method, without departing the scope of the disclosure.
[0081] The other structure of the bidirectional valve plate 5 shown in Fig. 13-Fig. 16 is the same as the bidirectional valve plate 5 shown in Fig. 4-Fig. 7, and thus the description about the bidirectional valve plate 5 shown in Fig. 4-Fig. 7 also applies to the bidirectional valve plate 5 shown in Fig. 13-Fig. 16.
[0082] Fig. 17 is a schematic bottom perspective view of the filter sealing plate 4 of the filtering assembly 100 of Fig. 12. Fig. 18 is a schematic top perspective view of the filter sealing plate 4 of the filtering assembly 100 of Fig. 12.
[0083] According to one example, the filter sealing plate 4 may be provided with a sealing plate welding rib 17 extending around outer circumference of the filter sealing plate 4 in the same direction as the filter element mounting boss 24. The sealing plate welding rib 17 is configured to be welded to the upper housing 1, so as to secure the filter sealing plate 4 to the upper housing 1. According to one example, the filter sealing plate 4 can be secured to the upper housing 1 by ultrasonic soldering. As understood by those skilled in the art, the filter sealing plate 4 can be secured to the upper housing 1 by any other suitable welding method, without departing the scope of the disclosure.
[0084] The other structure of the filter sealing plate 4 shown in Fig. 17-Fig. 18 is the same as the filter sealing plate 4 shown in Fig. 8-Fig. 9, and thus the description about the filter sealing plate 4 shown in Fig. 8-Fig. 9 also applies to the filter sealing plate 4 shown in Fig. 17-Fig. 18.
[0085] Fig. 19 is a schematic cross-sectional view of a portion of the filtering assembly 100, showing air flow path through the filtering assembly 100 when the filtering assembly 100 is in air intake mode. Air is suctioned from outer environment, flows through the filter element 3, the central opening 41 of the filter element mounting boss 24, and the sound absorbing medium 6. The first umbrella valve 7 is open and the second umbrella valve 57 is closed. Then the air flows through the at least one first air hole 21, the plurality of vent holes 91 of the desiccant sealing cover 9, the first filter pad 10, and the desiccant unit 11, and then flows to the air inlet end of the compressor.
[0086] Fig. 20 is a schematic cross-sectional view of a portion of the filtering assembly 100, showing air flow path through the filtering assembly 100 when the filtering assembly 100 is in exhaust mode. Air is exhausted from the air inlet end of the compressor, flows through the desiccant unit 11, the first filter pad 10, and the plurality of vent holes 91 of the desiccant sealing cover 9. The first umbrella valve 7 is closed and the second umbrella valve 57 is open. Then the air flows through the at least one second air hole 51, the sound absorbing medium 6, the central opening 41 of the filter element mounting boss 24, and the filter element 3, and then flows to the outer environment.
[0087] When the filtering assembly 100 is in neither air intake mode nor exhaust mode, both the first umbrella valve 7 and the second umbrella valve 57 are closed, thus the desiccant unit 11 is in an isolated state from the outer environment, thereby lengthening the useful life of the desiccant unit 11.
[0088] Aspects of the present disclosure have been described in detail with reference to the illustrated embodiments; those skilled in the art will recognize, however, that many modifications may be made thereto without departing from the scope of the present disclosure. The present disclosure is not limited to the precise construction and compositions disclosed herein; any and all modifications, changes, and variations apparent from the foregoing descriptions are within the scope of the disclosure as defined by the appended claims. Moreover, the present concepts expressly include any and all combinations and subcombinations of the preceding elements and features.
Claims
1.Afiltering assembly (100) comprising:an upper housing (1) ;a lower housing (2) securable to the upper housing (1) ;a filter sealing plate (4) securable to the upper housing (1) to define a filter space (61) therebetween;a filter element (3) disposed within the filter space (61) ;a bidirectional valve plate (5) securable to the lower housing (2) , the bidirectional valve plate (5) comprising a first mounting hole (22) , asecond mounting hole (52) , at least one first air hole (21) around the first mounting hole (22) , and at least one second air hole (51) around the second mounting hole (52) ;a first umbrella valve (7) mounted to the first mounting hole (22) in a first mounting direction, and configured to selectively open and close the at least one first air hole (21) ; anda second umbrella valve (57) mounted to the second mounting hole (52) in a second mounting direction opposite to the first mounting direction, and configured to selectively open and close the at least one second air hole (51) .2.The filtering assembly (100) according to claim 1, wherein the filtering assembly (100) further comprises a sound absorbing medium (6) disposed between the filter sealing plate (4) and the bidirectional valve plate (5) .3.The filtering assembly (100) according to claim 1, wherein the filtering assembly (100) further comprises:a desiccant unit (11) disposed in the lower housing (2) ;a desiccant sealing cover (9) disposed on top of the desiccant unit (11) and comprising a plurality of vent holes (91) extending through the desiccant sealing cover (9)in an axial direction of the filtering assembly (100) ; anda compression spring (8) disposed between the bidirectional valve plate (5) and the desiccant sealing cover (9) .4.The filtering assembly (100) according to claim 3, wherein the filtering assembly (100) further comprises a first filter pad (10) disposed between the desiccant sealing cover (9) and the desiccant unit (11) .5.The filtering assembly (100) according to claim 4, wherein the filtering assembly (100) further comprises a second filter pad disposed between an end of the desiccant unit (11) opposite to the first filter pad (10) and the lower housing (2) .6.The filtering assembly (100) according to claim 1, wherein the filter sealing plate (4) comprises a filter element mounting boss (24) configured to receive a corresponding recess of the filter element (3) , the filter element mounting boss (24) having an annular cross-section with an outer diameter smaller than that of the filter sealing plate (4) , extending in an axial direction of the filtering assembly (100) , and defining a central opening (41) for air flow therethough.7.The filtering assembly (100) according to claim 6, wherein the filter sealing plate (4) further comprises a sealing plate welding rib (17) extending around an outer circumference of the filter sealing plate (4) in the same direction as the filter element mounting boss (24) , the sealing plate welding rib (17) being configured to be welded to the upper housing (1) to secure the filter sealing plate (4) to the upper housing (1) .8.The filtering assembly (100) according to claim 6, wherein the filter sealing plate (4) further comprises a plurality of sealing plate mounting bosses (14) distributed around an outer circumference of the filter sealing plate (4) and extending radially outward from the outer circumference of the filter sealing plate (4) , andwherein the upper housing (1) comprises a plurality of sealing plate mounting buckles (13) equal in number to the plurality of sealing plate mounting bosses (14) and aligned circumferentially with the plurality of sealing plate mounting bosses (14) , the plurality of sealing plate mounting buckles (13) being configured to receive the plurality of sealing plate mounting bosses (14) , respectively, to secure the filter sealing plate (4) to the upper housing (1) .9.The filtering assembly (100) according to claim 1, wherein the bidirectional valve plate (5) further comprises:a first valve accommodating recess (54) receiving a first umbrella portion (55) of the first umbrella valve (7) ; anda second valve accommodating recess (53) receiving a second umbrella portion (56) of the second umbrella valve (57) .10.The filtering assembly (100) according to claim 1, wherein the bidirectional valve plate (5) further comprises a valve plate welding rib (18) extending around an outer circumference of the bidirectional valve plate (5) in an axial direction of the filtering assembly (100) , the valve plate welding rib (18) being configured to be welded to the lower housing (2) to secure the bidirectional valve plate (5) to the lower housing (2) .11.The filtering assembly (100) according to claim 1, wherein the bidirectional valve plate (5) further comprises a plurality of valve plate mounting bosses (16) distributed around an outer circumference of the bidirectional valve plate (5) and extending radially outward from the outer circumference of the bidirectional valve plate (5) , andwherein the lower housing (2) comprises a plurality of valve plate mounting buckles (15) equal in number to the plurality of valve plate mounting bosses (16) and aligned circumferentially with the plurality of valve plate mounting bosses (16) , the plurality of valve plate mounting buckles (15) being configured to receive the plurality ofvalve plate mounting bosses (16) , respectively, to secure the bidirectional valve plate (5) to the lower housing (2) .12.The filtering assembly (100) according to claim 3, wherein the bidirectional valve plate (5) further comprises a plurality of spring seats (20) each extending in the axial direction of the filtering assembly (100) , the plurality of spring seats (20) being configured to hold the compression spring (8) .
Citation Information
Patent Citations
Drying filter
CN105737465A
Air filter housing for an internal combustion engine
DE10332453B4
Air filter for combustion engine
EP2305992A2
Adsorbent system
US20230091907A1
Air pumping system for an automotive seat
US5893609A