Air filter and vehicle

Abstract

The utility model provides an air filter and a vehicle. The air filter comprises a filter shell and a filtering part arranged in the filter shell. The filter shell comprises an air inlet cavity with an air inlet, an air outlet cavity with an air outlet and a transition cavity communicated with the air inlet cavity and the air outlet cavity. The filter part comprises a frame body arranged on the filter shell, and a first filter element and a second filter element which are arranged on the frame body, the first filter element is positioned at the communication part of the air inlet cavity and the transition cavity, and the second filter element is positioned at the communication part of the air outlet cavity and the transition cavity. According to the air filter, the first filter element is arranged at the communication position of the air inlet cavity and the transition cavity, and the second filter element is arranged at the communication position of the air outlet cavity and the transition cavity, so that air enters the air inlet cavity from the air inlet, then is subjected to primary filtration through the first filter element, and is subjected to secondary filtration through the second filter element after flowing through the transition cavity; the air filtering effect is favorably improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle parts technology, and in particular to an air filter; at the same time, this utility model also relates to a vehicle equipped with the air filter. Background Technology

[0002] Air filters in vehicles are used to filter solid impurities such as dust, pollen, and sand from the air. For vehicles using hydrogen fuel cells, the filtration requirements for air filters are even higher, as they remove particulate matter such as dust, as well as air pollutants such as SO2, NOx, and NH3. Current air filters typically have a single filter element that performs both coarse and fine filtration functions. This not only results in poor filtration efficiency but also a low dust holding capacity, leading to a short lifespan and increased replacement and maintenance costs. Utility Model Content

[0003] In view of this, the present invention aims to provide an air filter to improve the air filtration effect.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] An air filter includes a filter housing and a filter section disposed within the filter housing;

[0006] The filter housing includes an air inlet chamber with an air inlet, an air outlet chamber with an air outlet, and a transition chamber connecting the air inlet chamber and the air outlet chamber.

[0007] The filtration unit includes a frame disposed on the filter housing, and a first filter element and a second filter element disposed on the frame. The first filter element is located at the communication between the air inlet chamber and the transition chamber, and the second filter element is located at the communication between the air outlet chamber and the transition chamber.

[0008] Furthermore, the filter housing includes an upper housing and a lower housing that are fastened together, the transition cavity is located in the upper housing, and the air inlet cavity and the air outlet cavity are both located in the lower housing; the frame is made of foamed material and is sandwiched between the upper housing and the lower housing, and is used to seal the gap between them.

[0009] Furthermore, the frame is provided with a boss that protrudes outward along its circumference, and the frame rests on the lower housing through the boss.

[0010] Furthermore, the first filter element and the second filter element are located on the same side of the frame.

[0011] Furthermore, the frame has a first mounting hole and a second mounting hole arranged adjacent to each other; the top end of the first filter element is inserted into the first mounting hole and connected to the side wall of the first mounting hole, and the top end of the second filter element is inserted into the second mounting hole and connected to the side wall of the second mounting hole.

[0012] Furthermore, the frame has a first annular protrusion disposed along the edge of the first mounting hole, the first annular protrusion being located on top of the first filter element and connected to the first filter element; and / or, the frame has a second annular protrusion disposed along the edge of the second mounting hole, the second annular protrusion being located on top of the second filter element and connected to the second filter element.

[0013] Furthermore, the filter housing is provided with a sound-absorbing part located within the transition cavity.

[0014] Furthermore, the first filter element is an activated carbon filter element; the second filter element is a paper filter element.

[0015] Furthermore, the activated carbon filter element includes an activated carbon layer and coarse filter layers disposed on both sides of the activated carbon layer.

[0016] Compared with the prior art, this utility model has the following advantages:

[0017] The air filter of this utility model, by placing the first filter element at the connection between the air inlet chamber and the transition chamber, and the second filter element at the connection between the air outlet chamber and the transition chamber, allows air to undergo primary filtration by the first filter element after entering the air inlet chamber, and then undergo secondary filtration by the second filter element after flowing through the transition chamber. This not only effectively ensures the filtration effect of the air, but also allows the first filter element to have a lower filtration precision, which can increase its dust holding capacity, thereby extending the service life of the filter part, especially the first filter element, and thus helping to reduce the maintenance and replacement costs of the filter part.

[0018] Secondly, the upper and lower housings facilitate the formation of the filter housing. The transition chamber is located on the upper housing, while the inlet and outlet chambers are located on the lower housing. This allows air to enter the transition chamber from bottom to top, effectively trapping impurities below the first filter element and causing them to fall to the bottom of the inlet chamber. This reduces impurity adhesion to the first filter element, extending its lifespan. It also optimizes the internal space of the filter housing, making the arrangement of chambers and filter elements more compact and orderly. The polyurethane frame provides good elasticity, ensuring a good seal between the upper and lower housings. The frame is mounted on the lower housing via bosses, facilitating the installation and positioning of the filter unit on the lower housing and ensuring a good seal between the frame and the upper and lower housings. Placing the first and second filter elements on the same side of the frame reduces the overall thickness of the filter unit, minimizing its space requirements and facilitating its layout and manufacturing.

[0019] Furthermore, the top of the first filter element is inserted into the first mounting hole and connected to the side wall of the first mounting hole, while the top of the second filter element is inserted into the second mounting hole and connected to the side wall of the second mounting hole. This facilitates the connection between the first and second filter elements and the frame. The first annular protrusion is connected to the top of the first filter element, which strengthens the fixation of the first filter element to the frame and provides better connection stability, preventing the first filter element from being pushed off the frame by air. Similarly, the second annular protrusion is connected to the top of the second filter element, which also improves the connection between the second filter element and the frame and prevents the second filter element from being pushed off the frame by air. By providing a sound-absorbing part in the transition cavity, the noise of the air filter is reduced.

[0020] Furthermore, activated carbon filters are beneficial for improving primary air filtration, and their technology is mature and easy to design and implement. Paper filters facilitate secondary air filtration and can block impurities, preventing them from flowing out of the air outlet. The combination of activated carbon and paper filters improves air filtration efficiency and reduces maintenance costs for the filter system. Activated carbon filters have coarse filter layers on both sides of the activated carbon layer. Compared to existing technologies that combine coarse and fine filter layers, this increases the dust holding capacity of the activated carbon filter and extends its service life.

[0021] In addition, another objective of this utility model is to provide a vehicle equipped with an air filter as described above.

[0022] The vehicle described in this utility model, by setting the air filter as described above, helps to reduce the maintenance and replacement costs of the filter section and has a high filtration effect. Attached Figure Description

[0023] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0024] Figure 1 This is a disassembly diagram of the air filter described in Embodiment 1 of this utility model;

[0025] Figure 2 This is a schematic diagram of the air filter described in Embodiment 1 of this utility model from one perspective.

[0026] Figure 3 This is a schematic diagram of the air filter described in Embodiment 1 of this utility model from another perspective;

[0027] Figure 4 for Figure 3 Sectional view along direction AA in the middle;

[0028] Figure 5 This is a schematic diagram of the filter section and lower housing in the assembled state according to Embodiment 1 of this utility model;

[0029] Figure 6 This is a schematic diagram of the lower shell structure according to Embodiment 1 of this utility model;

[0030] Figure 7 This is a schematic diagram of the upper shell structure according to Embodiment 1 of this utility model;

[0031] Figure 8 This is a schematic diagram of the filter section according to Embodiment 1 of this utility model;

[0032] Figure 9 This is a schematic diagram of the frame structure described in Embodiment 1 of this utility model.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100. Filter housing; 200. Inlet chamber; 300. Transition chamber; 400. Outlet chamber; 500. Filter section;

[0035] 1. Upper housing; 2. Lower housing; 3. Second filter element; 4. Frame; 5. First filter element;

[0036] 101. Top frame; 102. Top reinforcing rib; 103. Second protruding ring; 104. Top connecting block; 105. Reinforcing protrusion; 1051. Groove; 106. Third protruding ring;

[0037] 201. Shell body; 202. Partition; 203. Air inlet; 204. Air outlet; 205. Lower frame; 206. Lower reinforcing rib; 207. Lower connecting block; 208. Reinforcing recess; 209. First convex ring;

[0038] 401, Body; 4011, Boss; 4012, First mounting hole; 4013, Second mounting hole; 4014, First annular protrusion; 4015, Second annular protrusion; 402, Separator beam. Detailed Implementation

[0039] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0040] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., 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 utility model 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 utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0042] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0043] Example 1

[0044] This embodiment relates to an air filter to solve the problems of poor filtration effect and high maintenance cost of existing air filters.

[0045] In terms of overall structure, the air filter described in this embodiment includes a filter housing 100 and a filter section 500 disposed within the filter housing 100. The filter housing 100 includes an air inlet chamber 200 with an air inlet 203, an air outlet chamber 400 with an air outlet 204, and a transition chamber 300 connecting the air inlet chamber 200 and the air outlet chamber 400. The filter section 500 includes a frame 4 disposed on the filter housing 100, and a first filter element 5 and a second filter element 3 disposed on the frame 4. The first filter element 5 is located at the connection between the air inlet chamber 200 and the transition chamber 300, and the second filter element 3 is located at the connection between the air outlet chamber 400 and the transition chamber 300.

[0046] The air filter described in this embodiment, by placing the first filter element 5 at the connection between the air inlet chamber 200 and the transition chamber 300, and placing the second filter element 3 at the connection between the air outlet chamber 400 and the transition chamber 300, allows air entering the air inlet chamber 200 from the air inlet 203 to undergo primary filtration through the first filter element 5, and then undergo secondary filtration through the second filter element 3 after flowing through the transition chamber 300. This not only effectively ensures the filtration effect of the air, but also allows the first filter element 5 to have a lower filtration precision, increasing its dust holding capacity, thereby extending the service life of the filter unit 500, especially the first filter element 5, and thus reducing the maintenance and replacement costs of the filter unit 500. Furthermore, by placing both the first filter element 5 and the second filter element 3 on the frame 4, it is convenient to install and remove the entire filter unit 500, and also convenient to maintain the filter unit 500.

[0047] Based on the above overview, an exemplary structure of the air filter described in this embodiment is as follows: Figures 1 to 4 As shown in the figure. In a preferred embodiment, the filter housing 100 includes an upper housing 1 and a lower housing 2 that are snapped together. A transition cavity 300 is disposed within the upper housing 1, and an air inlet cavity 200 and an air outlet cavity 400 are both disposed within the lower housing 2. A frame 4 is made of foamed material and is sandwiched between the upper housing 1 and the lower housing 2, serving to seal the gap between them.

[0048] In this embodiment, the upper housing 1 and the lower housing 2 are used to form the filter housing 100. The transition cavity 300 is disposed on the upper housing 1, and the air inlet cavity 200 and the air outlet cavity 400 are disposed on the lower housing 2. This allows air to enter the transition cavity 300 from bottom to top, which not only helps to block impurities below the first filter element 5, but also allows the impurities to fall to the bottom of the air inlet cavity 200 under their own gravity, thus reducing the adhesion of impurities on the first filter element 5 and extending the service life of the first filter element 5.

[0049] Furthermore, the arrangement of the inner cavities of the upper housing 1 and the lower housing 2 helps to optimize the utilization of the internal space of the filter, making the arrangement of each cavity and filter element more compact and orderly. The frame 4, made of foamed material, has good elasticity, which not only meets the arrangement of the filter section 500, but also helps to ensure the sealing effect between the upper housing 1 and the lower housing 2. In this embodiment, the frame 4 is preferably made of polyurethane.

[0050] An exemplary structure of the lower housing 2 is as follows: Figure 6 As shown, the lower housing 2 includes a housing body 201 with a cavity, and a partition 202 disposed within the housing body 201. The top of the cavity is open, and the cavity is divided by the partition 202 into an air intake cavity 200 on one side and an air outlet cavity 400 on the other side. The opening is further divided by the partition 202 into a first connecting port for connecting the air intake cavity 200 and the transition cavity 300, and a second connecting port for connecting the air outlet cavity 400 and the transition cavity 300. The connection between the air intake cavity 200 and the transition cavity 300 is specifically at the first connecting port, and the connection between the air outlet cavity 400 and the transition cavity 300 is specifically at the second connecting port.

[0051] In this embodiment, the partition 202 is preferably integrally formed with the shell body 201 to ensure a good seal between the air inlet chamber 200 and the air outlet chamber 400, and to improve the connection strength and assembly efficiency between the partition 202 and the shell body 201. Of course, the shell body 201 and the partition 202 can also be processed separately and then installed together, as long as the usage requirements are met.

[0052] As a feasible arrangement, both the air inlet chamber 200 and the air outlet chamber 400 have rectangular cross-sections. The air inlet 203 is located at the bottom of the air inlet chamber 200, corresponding to one side of the lower housing 2 in the width direction, and the air outlet 204 is located at the bottom of the air outlet chamber 400, corresponding to one end of the lower housing 2. Of course, in specific implementations, the cross-sectional shapes of the air inlet chamber 200 and the air outlet chamber 400, as well as the positions and orientations of the air inlet 203 and the air outlet 204, can be adaptively adjusted according to usage requirements.

[0053] As a preferred implementation method, combined with Figure 5 , Figure 8 and Figure 9 As shown, the frame 4 is provided with a boss 4011 that protrudes outward along its circumference, and the frame 4 is mounted on the lower housing 2 through the boss 4011. This not only facilitates the installation and positioning of the filter part 500 on the lower housing 2 and improves the installation convenience of the frame 4, but also helps to ensure the sealing effect between the upper housing 1 and the lower housing 2 by the frame 4.

[0054] In this embodiment, the first filter element 5 and the second filter element 3 are preferably located on the same side of the frame 4. This not only reduces the overall thickness of the filter section 500 and its space occupation, thus facilitating its arrangement and implementation, but also makes it easier to process and shape. Figure 8 and Figure 9 As shown, both the first filter element 5 and the second filter element 3 are located on the lower side of the frame 4. This arrangement ensures that when the protrusion 4011 on the frame 4 overlaps the top of the lower housing 2, the first filter element 5 is positioned on top of the air inlet chamber 200, and the second filter element 3 is positioned on top of the air outlet chamber 400. The first filter element 5 and the second filter element 3 are spaced apart, forming an insertion space between them for the top of the partition 202 to be inserted. This allows the first filter element 5 and the second filter element 3 to be positioned on opposite sides of the partition 202 in the installed state. The partition 202 also provides support for the filter section 500.

[0055] Reference Figure 9 As shown, the frame 4 has a first mounting hole 4012 and a second mounting hole 4013 arranged adjacent to each other. The top end of the first filter element 5 is inserted into the first mounting hole 4012 and connected to the side wall of the first mounting hole 4012, and the top end of the second filter element 3 is inserted into the second mounting hole 4013 and connected to the side wall of the second mounting hole 4013. This arrangement, where the top end of the first filter element 5 is inserted into the first mounting hole 4012 and connected to the side wall of the first mounting hole 4012, and the top end of the second filter element 3 is inserted into the second mounting hole 4013 and connected to the side wall of the second mounting hole 4013, facilitates the connection between the first filter element 5 and the second filter element 3 and the frame 4, and also ensures a proper airflow path.

[0056] To further enhance the connection strength between the frame 4, the first filter element 5, and the second filter element 3, the frame 4 has a first annular protrusion 4014 along the edge of the first mounting hole 4012. The first annular protrusion 4014 is located on top of the first filter element 5 and connected to it. The frame 4 also has a second annular protrusion 4015 along the edge of the second mounting hole 4013. The second annular protrusion 4015 is located on top of the second filter element 3 and connected to it. Connecting the first annular protrusion 4014 to the top of the first filter element 5 strengthens the fixation of the first filter element 5 to the frame 4 and provides better connection stability, preventing the first filter element 5 from being pushed off the frame 4 by air. Similarly, connecting the second annular protrusion 4015 to the top of the second filter element 3 also improves the connection stability between the second filter element 3 and the frame 4, preventing the second filter element 3 from being pushed off the frame 4 by air.

[0057] Reference Figure 9As shown, the frame 4 of this embodiment includes a body 401 with mounting holes inside, and a partition beam 402 provided on the body 401. The partition beam 402 is provided corresponding to the partition plate 202 and divides the mounting holes into the first mounting hole 4012 and the second mounting hole 4013. The portions of the first annular protrusion 4014 and the second annular protrusion 4015 located on the partition beam 402 can be integrated (that is, the protrusions on the partition beam 402 constitute both a part of the first annular protrusion 4014 and a part of the second annular protrusion 4015). This allows the first annular protrusion 4014 and the second annular protrusion 4015 to share some structures, thereby simplifying the structure of the frame 4. Of course, two protrusions can also be provided on the partition beam 402, in which case one protrusion constitutes a part of the first annular protrusion 4014 and the other protrusion constitutes a part of the second annular protrusion 4015.

[0058] In a preferred embodiment, after the first filter element 5 and the second filter element 3 are formed separately, their tops are placed into the mold used to form the frame 4. As the frame 4 is formed, the frame 4, the first filter element 5, and the second filter element 3 are connected together, which improves processing efficiency and provides high connection strength. To further extend the service life of the filter section 500, in this embodiment, the area of ​​the first filter element 5 is larger than the area of ​​the second filter element 3. Specifically, the cross-sectional area at the connection between the air inlet chamber 200 and the transition chamber 300 is larger than the cross-sectional area at the connection between the air outlet chamber 400 and the transition chamber 300. Correspondingly, the area of ​​the first mounting hole 4012 is larger than the area of ​​the second mounting hole 4013.

[0059] Thus, when the air filter is working, because the first filter element 5 has a larger area, it can accept a larger flow of air in the initial stage, allowing the air to pass through its surface in a relatively dispersed manner for preliminary filtration. The air that has passed through the first filter element 5 for preliminary filtration then flows to the second filter element 3 for fine filtration, thereby ensuring the filtration effect of the filter section 500.

[0060] To ensure a proper seal between the upper housing 1 and the lower housing 2, such as Figures 4 to 7 As shown, a lower frame 205 is provided on the outer edge of the top of the lower housing 2, which is circumferentially protruding. The boss 4011 of the frame 4 is specifically placed on the lower frame 205, and a first protruding ring 209 is provided on the top of the lower frame 205, which is upwardly protruding and arranged along its own circumference. The first protruding ring 209 is located outside the boss 4011.

[0061] An upper frame 101 protruding outward in the circumferential direction is provided at the bottom edge of the upper housing 1, and a second protruding ring 103 protruding downward and arranged circumferentially at the bottom of the upper frame 101. The second protruding ring 103 is located inside the boss 4011 relative to the first protruding ring 209, and as the upper frame 101 and lower frame 205 are engaged, the bottom end of the second protruding ring 103 abuts against a portion of the first annular protrusion 4014 and the second annular protrusion 4015. An annular mounting cavity is formed between the upper frame 101, the second protruding ring 103, the lower frame 205, and the first protruding ring 209. The boss 4011 is sandwiched between the upper frame 101 and the lower frame 205 and fills the mounting cavity, thereby achieving a seal between the upper housing 1 and the lower housing 2.

[0062] Furthermore, a third protruding ring 106 located outside the second protruding ring 103 can be provided inside the upper frame 101. When the upper housing 1 and the lower housing 2 are in the snap-fit ​​state, the third protruding ring 106 abuts against the outside of the first protruding ring 209. That is, the first protruding ring 209 and the boss 4011 are located between the second protruding ring 103 and the third protruding ring 106, which helps to improve the connection effect between the upper frame 101 and the lower frame 205.

[0063] In this embodiment, the upper housing 1 and the lower housing 2 are detachably connected, which facilitates the maintenance or replacement of the filter section 500. As a possible implementation, such as... Figure 6 and Figure 7 As shown, a plurality of lower connecting blocks 207 are provided circumferentially spaced around the outer periphery of the lower frame 205, and each lower connecting block 207 has a threaded hole. Corresponding to each lower connecting block 207, a plurality of upper connecting blocks 104 are provided around the outer periphery of the upper frame 101, and each upper connecting block 104 has a through hole. Connecting components, such as bolts, can pass through the through holes and be screwed into the corresponding threaded holes, thereby connecting the upper housing 1 and the lower housing 2 together. As the connecting components are tightened, the frame 4 is compressed and filled into the mounting cavity to ensure the sealing between the upper housing 1 and the lower housing 2, thereby improving the air filtration effect.

[0064] like Figure 6 and Figure 7 As shown, a plurality of upper reinforcing ribs 102 may be provided between the top of the upper frame 101 and the outer peripheral wall of the upper shell 1, with the plurality of upper reinforcing ribs 102 spaced apart circumferentially along the upper frame 101. A plurality of lower reinforcing ribs 206 may be provided between the bottom of the lower frame 205 and the outer peripheral wall of the lower shell 2, with the plurality of lower reinforcing ribs 206 spaced apart circumferentially along the lower frame 205. The structure of the upper reinforcing ribs 102 and the lower reinforcing ribs 206 is simple, easy to arrange and implement, and beneficial to improving the structural strength at the connection between the upper shell 1 and the lower shell 2.

[0065] In this embodiment, the first filter element 5 is an activated carbon filter element, and the second filter element 3 is a paper filter element. The activated carbon filter element is beneficial for improving the primary filtration effect on larger air impurities and is easy to implement. The paper filter element is beneficial for achieving secondary filtration of smaller air impurities and can block impurities, thereby preventing them from flowing out of the air outlet 204. The combination of the activated carbon filter element and the paper filter element improves the filtration effect on air impurities and reduces the maintenance cost of the filter unit 500.

[0066] Existing activated carbon filter elements include an activated carbon layer, a coarse filter layer located on the windward side of the activated carbon layer, and a fine filter layer located on the leeward side of the activated carbon layer. The pore size of the coarse filter layer typically ranges from 300 to 1000 micrometers, while the pore size of the fine filter layer typically ranges from 30 to 45 micrometers. This results in a lower dust holding capacity for the activated carbon filter element, leading to a shorter service life.

[0067] The activated carbon filter element in this embodiment includes an activated carbon layer and coarse filter layers disposed on both sides of the activated carbon layer. The activated carbon filter element has coarse filter layers on both sides of the activated carbon layer. In this embodiment, by also providing a coarse filter layer on the leeward side of the activated carbon filter element, compared to the prior art scheme of providing a fine filter layer on the leeward side, it is beneficial to increase the dust holding capacity of the first filter element 5, thereby extending the service life of the first filter element 5. Compared to the scheme of combining coarse and fine filter layers, it is beneficial to increase the dust holding capacity of the activated carbon filter element and also to extend the service life of the activated carbon filter element.

[0068] The overall structure of the activated carbon filter element in this embodiment is roughly the same as that of the activated carbon filter element in the prior art. The difference is that a coarse filter layer is provided on both sides of the activated carbon layer in this embodiment. The specific structure can be improved by referring to the existing structure, and the coarse filter layer is usually made of non-woven fabric.

[0069] in addition, Figure 3 The diagram only shows the overall framework of the paper filter element. In this embodiment, the paper filter element serves two purposes: firstly, it effectively removes small-diameter particulate impurities from the air, and secondly, it prevents activated carbon detached from the activated carbon filter element from flowing into the next component, thus providing a safety protection function. Furthermore, the paper filter element increases the filtration area, thereby improving the filtration effect of the second filter element 3. Moreover, the paper filter element is a commonly used structure in the art, readily available, and easy to design and implement.

[0070] In this embodiment, a sound-absorbing part located within the transition cavity 300 may also be provided on the filter housing 100. By providing a sound-absorbing part within the transition cavity 300, the noise of the air filter is reduced, and the air within the transition cavity 300 is relatively clean, making the sound-absorbing part less prone to contamination, thus ensuring the performance of the sound-absorbing part.

[0071] In a preferred embodiment, the sound-absorbing part is specifically disposed on the top wall of the transition cavity 300. The sound-absorbing part can be made of sound-absorbing cotton, which has a simple structure, is easy to arrange and implement, and has a good noise reduction effect. By placing the sound-absorbing cotton inside the transition cavity 300, even if the fibers of the sound-absorbing cotton fall off, they can be blocked by the second filter element 3, preventing the fibers from flowing into the next component. Of course, the specific position of the sound-absorbing part within the transition cavity 300 can be adaptively adjusted according to usage requirements.

[0072] To further enhance the structural strength of the filter housing 100, such as Figure 2 As shown, a reinforcing protrusion 105 can also be provided on the top of the upper housing 1, extending along the length of the upper housing 1. The number of reinforcing protrusions 105 can be two as shown in the figure, or can be increased or decreased according to usage requirements. Figure 6 As shown, a plurality of reinforcing recesses 208 are provided on the outer periphery of the bottom of the lower housing 2, which are recessed inward. The cooperation of the plurality of reinforcing recesses 208 also helps to improve the structural strength of the lower housing 2, and the structure of the reinforcing recesses 208 is simple and easy to process and form.

[0073] In addition, such as Figure 7 As shown, each reinforcing protrusion 105 is also provided with a groove 1051 that communicates with the transition cavity 300, and the groove 1051 extends along the length direction of the reinforcing protrusion 105. The groove 1051 here can also be used to coat the adhesive, so as to facilitate the bonding of the sound-absorbing cotton to the top wall of the transition cavity 300, and has good connection strength.

[0074] In this embodiment, the air filter, when in use, follows the airflow path as follows: Figure 4 As shown by the arrow, the air flowing in from the air inlet 203 first flows through the first filter element 5 for primary filtration from bottom to top and then flows into the transition chamber 300. After that, it flows through the second filter element 3 for secondary filtration from top to bottom and then flows into the air outlet chamber 400. Finally, it is discharged through the air outlet 204.

[0075] The air filter in this embodiment, through the cooperation of the first filter element 5 and the second filter element 3, can achieve two-stage filtration of air, which not only improves the filtration effect but also extends the service life of the filter section 500, especially the first filter element 5. Furthermore, by mounting the first filter element 5 and the second filter element 3 on the same frame 4, the installation efficiency of the filter section 500 is improved, and the filter section 500 is easily accessible, thus facilitating maintenance or replacement of the first filter element 5 and the second filter element 3.

[0076] Example 2

[0077] This embodiment relates to a vehicle equipped with an air filter as described above.

[0078] The vehicle described in this embodiment can be, for example, a new energy vehicle equipped with a hydrogen fuel cell. In this case, by installing the aforementioned air filter, the cleanliness of the air flowing into the air compressor and fuel cell stack is improved, and foreign objects are prevented from entering the air compressor and fuel cell stack, thus providing a better protective effect. In addition, installing the aforementioned air filter also helps to reduce the maintenance and replacement costs of the filter section 500.

[0079] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An air cleaner characterized in that: it comprises a filter housing (100) and a filter part (500) arranged in the filter housing (100); the filter housing (100) comprises an air inlet cavity (200) with an air inlet (203), an air outlet cavity (400) with an air outlet (204), and a transition cavity (300) connecting the air inlet cavity (200) and the air outlet cavity (400); the filter part (500) comprises a frame (4) arranged on the filter housing (100), and a first filter element (5) and a second filter element (3) arranged on the frame (4), the first filter element (5) being located at the connection between the air inlet cavity (200) and the transition cavity (300), and the second filter element (3) being located at the connection between the air outlet cavity (400) and the transition cavity (300).

2. The air cleaner according to claim 1, characterized in that: the filter housing (100) comprises an upper housing (1) and a lower housing (2) connected by snap fit, the transition cavity (300) is arranged in the upper housing (1), and the air inlet cavity (200) and the air outlet cavity (400) are both arranged in the lower housing (2); the frame (4) is made of foamed material, and is clamped between the upper housing (1) and the lower housing (2) to seal the gap therebetween.

3. The air cleaner according to claim 2, characterized in that: the frame (4) is provided with a boss (4011) protruding outward along the circumference thereof, and the frame (4) is arranged on the lower housing (2) by the boss (4011).

4. The air cleaner according to claim 1, characterized in that: the first filter element (5) and the second filter element (3) are arranged on the same side of the frame (4).

5. The air cleaner according to claim 1, characterized in that: the frame (4) has a first mounting hole (4012) and a second mounting hole (4013) arranged adjacently; the top end of the first filter element (5) is inserted into the first mounting hole (4012) and connected with the side wall of the first mounting hole (4012), and the top end of the second filter element (3) is inserted into the second mounting hole (4013) and connected with the side wall of the second mounting hole (4013).

6. The air cleaner according to claim 5, characterized in that: the frame (4) has a first annular protrusion (4014) arranged along the edge of the first mounting hole (4012), the first annular protrusion (4014) being located on the top of the first filter element (5) and connected with the first filter element (5); and / or the frame (4) has a second annular protrusion (4015) arranged along the edge of the second mounting hole (4013), the second annular protrusion being located on the top of the second filter element (3) and connected with the second filter element (3).

7. The air cleaner according to claim 1, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The filter housing (100) is provided with a sound absorption part in the transition cavity (300).

8. The air filter according to any one of claims 1 to 7, characterized in that: The first filter element (5) is an activated carbon filter element. The second filter element (3) is a paper filter element.

9. The air filter according to claim 8, characterized in that: The activated carbon filter element comprises an activated carbon layer and coarse filter layers arranged on both sides of the activated carbon layer.

10. A vehicle, characterized in that: The vehicle is provided with the air filter according to any one of claims 1 to 9.

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