Air cleaner and method of assembling and disassembling air cleaner

Abstract

The invention provides an air filter and a method for assembling and disassembling the air filter, the air filter comprises a shell, the shell is provided with a first circulation port and two second circulation ports, to-be-filtered air enters the shell from the first circulation port, flows out of the two second circulation ports after being filtered by the air filter, and then flows out of the shell from the first circulation port; or the to-be-filtered air enters the shell from the two second circulation openings, is filtered by the air filter and then flows out from the first circulation opening; the first filter element unit comprises a hollow cylindrical structure and is provided with a first open end and a first closed end, the second filter element unit comprises a hollow cylindrical structure and is provided with a second open end and a second closed end, and the first closed end and the second closed end are oppositely arranged in the shell; and the first open end portion and the second open end portion are disposed opposite to each other to face opposite directions. According to the air filter, a better sealing effect is achieved, and the filter element units are convenient to disassemble and assemble during maintenance.

Description

Technical Field

[0001] The present invention relates to the field of filters, and more particularly, to an air filter and a method for assembling and disassembling the air filter. Background Art

[0002] Existing air filters are generally designed to install a single filter element unit in a housing. Two air outlets are usually provided at both ends of the single filter element unit to supply air to the engine simultaneously. This kind of air filter is inconvenient for users to operate when installing and disassembling the filter element unit. Summary of the Invention

[0003] The present invention aims to provide an air filter that is convenient for disassembling the filter element unit and a method for assembling and disassembling the air filter.

[0004] According to one aspect of the present invention, there is provided an air filter, comprising: a housing having a first flow port and two second flow ports; the air to be filtered enters the housing through the first flow port and flows out through the two second flow ports after being filtered by the air filter, or the air to be filtered enters the housing through the two second flow ports and flows out through the first flow port after being filtered by the air filter; a first filter element unit including a hollow cylindrical structure having a first open end and a first closed end; a second filter element unit including a hollow cylindrical structure having a second open end and a second closed end; wherein the first closed end and the second closed end are disposed facing each other in the housing, and the first open end and the second open end are disposed opposite to each other and face opposite directions.

[0005] In an exemplary embodiment, the housing has a long cylindrical shape, and the two second flow ports are respectively disposed at both ends of the long cylindrical shape of the housing. The two second flow ports are respectively a first-side second flow port and a second-side second flow port; wherein the first open end of the first filter element unit leads to the first-side second flow port, and the second open end of the second filter element unit leads to the second-side second flow port.

[0006] In an exemplary embodiment, the first flow port includes two separate first flow ports, namely a first-side first flow port and a second-side first flow port. The first-side first flow port communicates with the outer periphery of the cylindrical structure of the first filter element unit, and the second-side first flow port communicates with the outer periphery of the cylindrical structure of the second filter element unit.

[0007] In an exemplary embodiment, the first filter element unit includes: one or more filter element bodies made of a filter material, each filter element body being a hollow cylindrical structure extending along an axial direction and having a first end and a second end; a first end cap located at the first open end, the first end cap supporting and connecting the first end; and a second end cap located at the first closed end, the second end cap supporting and connecting the second end; wherein the first end cap and the second end cap are adapted to be assembled with the housing to fix the first filter element unit; and the second filter element unit has a structure that is mirror-symmetrical to the first filter element unit.

[0008] In an exemplary embodiment, a groove is provided on the outer peripheral edge of the first end cap, wherein a protrusion is provided at a position of the housing corresponding to the groove, and the shape of the groove is configured to match the shape of the protrusion for positioning the first filter element unit.

[0009] In an exemplary embodiment, a window is provided on the outer peripheral edge of the second end cap, wherein a hook-shaped member is provided at a position of the housing corresponding to the window, and the shape of the window is configured to match the shape of the hook-shaped member for fixing the first filter element unit.

[0010] In an exemplary embodiment, the hook-shaped member includes a vertical portion and a horizontal hook portion extending from the vertical portion in a direction away from the first filter element unit, the horizontal hook portion being capable of being inserted into the window. The housing is further provided with a locking boss, and the locking boss is provided in a region on one side of the hook-shaped member. After the first filter element unit is installed in the housing, the hook-shaped member and the locking boss cooperate to fix the first filter element unit. Moreover, the dimension of the window in the vertical direction is greater than the dimension of the horizontal hook portion in the vertical direction, so that when disassembling the first filter element unit, the second end cap can be lifted a certain distance to enable the bottom of the first filter element unit to cross over the locking boss.

[0011] In an exemplary embodiment, the first filter element unit includes four filter element bodies, each of the filter element bodies having the same shape, and the first end cap having: an end cap base portion on which four through holes are formed, the four through holes being respectively in communication with the hollow interiors of the four filter element bodies; a sealing edge extending away from the filter element body along the axial direction of the filter element body from the surface of the end cap base portion, and the sealing edge having a closed annular shape to surround the four through holes; and a sealing ring, the sealing ring being an integral structure including a first sealing portion and a second sealing portion extending radially and perpendicularly from the first sealing portion, the first sealing portion being fixed to the outer peripheral surface of the sealing edge, and the second sealing portion being fixed to the surface of the end cap base portion, wherein a first protrusion having a toothed cross section is formed on the first sealing portion, the first protrusion being inclined in the direction of the end cap base portion as a whole; and wherein a second protrusion having a semi-circular cross section is formed on the second sealing portion, the second protrusion protruding in the direction away from the end cap base portion.

[0012] In an exemplary embodiment, the air filter further includes a mounting box cover installed between the first filter element unit and the second filter element unit, one side of the mounting box cover abutting against the first closed end portion, and the other side of the mounting box cover abutting against the second closed end portion.

[0013] According to another aspect of the present invention, there is provided a method for assembling and disassembling an air filter, the method including the following assembling steps: a first step of providing a housing of the air filter, the interior of the housing being provided with a protrusion, a hook-shaped member, and a locking boss provided on one side of the hook-shaped member; a second step of providing a first filter element unit having one or more filter element bodies and first and second end caps respectively provided at two ends of the filter element body, a groove being provided on the outer peripheral edge of the first end cap, and a window being provided on the outer peripheral edge of the second end cap; a third step of placing the first filter element unit into the inner space of the housing such that the first filter element unit moves a distance along the axial direction toward the region of the housing for receiving the first end cap, such that the groove is snapped together with the protrusion, and such that the hook-shaped member is inserted into the window; a fourth step of providing and installing a second filter element unit in the same manner as the second step and the third step; and a fifth step of inserting the mounting box cover between the first filter element unit and the second filter element unit.

[0014] In an exemplary embodiment, the method further includes the following disassembly steps: a sixth step of removing the installation box cover from between the first filter element unit and the second filter element unit; a seventh step of lifting the second end cover of the first filter element unit by a certain distance so that the bottom of the first filter element unit crosses the locking boss, and then moving the first filter element unit along the axial direction away from the area of the housing that receives the first end cover by a certain distance, so that the groove is disengaged from the protrusion and the hook-shaped member is disengaged from the window, thereby removing the first filter element unit from the internal space of the housing; an eighth step of removing the second filter element unit in the same manner as the seventh step.

[0015] In summary, the air filter and the method for assembling and disassembling the air filter according to the present invention can achieve the following beneficial technical effects superior to the prior art:

[0016] First, during the later maintenance of the air filter, it is more conducive to the disassembly and assembly of the filter element unit, and is very convenient to operate.

[0017] Second, the filter element unit can achieve radial sealing in the sealing structure, which is more reliable than end face sealing and realizes a better sealing effect.

[0018] Third, the structure of the air filter can be a dual-intake system, and there is no air flow between the two filter element units, which is more conducive to sealing. Especially when the air filter is used in a vehicle, there is no need for air intake between the two filter element units in the housing. Therefore, this dual-intake system is very suitable for the field of vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions thereof of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0020] Figure 1 is a schematic perspective view of a filter element unit for an air filter according to an exemplary embodiment of the present invention.

[0021] Figure 2 is a schematic perspective view of a housing of an air filter according to an exemplary embodiment of the present invention.

[0022] Figure 3 is a schematic cross-sectional view of an air filter according to an exemplary embodiment of the present invention.

[0023] Figure 4 is a schematic front view of an air filter according to an exemplary embodiment of the present invention.

[0024] Figure 5 is a schematic partial cross-sectional view of an air filter according to an exemplary embodiment of the present invention.

[0025] Figure 6 is a schematic front view of an air filter according to an exemplary embodiment of the present invention. For clarity, some components are removed.

[0026] Figure 7 is according to along Figure 6 schematic partial cross-sectional view taken along line B - B.

[0027] Figure 8 is a schematic front view of an air filter according to an exemplary embodiment of the present invention. For clarity, some components are removed, showing an intermediate state during the process of removing the filter element unit.

[0028] Figure 9 is according to along Figure 8 schematic partial cross-sectional view taken along line C - C.

[0029] Figure 10 is a schematic front view of an air filter according to an exemplary embodiment of the present invention. For clarity, some components are removed, showing the state where the filter element unit has been removed.

[0030] Figure 11 is Figure 3 a locally enlarged view at circle A of

[0031] showing the sealing structure of the first end cap.

[0032] 10, the first filter element unit

[0033] 11, the first open end

[0034] 12, the first closed end

[0035] 15, the groove

[0036] 16, the window

[0037] 17, the filter element body

[0038] 18, the first end cap

[0039] 181, the end cap base

[0040] 182, the through hole

[0041] 183, the sealing edge

[0042] 184, the sealing ring

[0043] 185, the first protrusion

[0044] 186. Second protruding part

[0045] 187. Reinforcing rib

[0046] 19. Second end cap

[0047] 20. Second filter element unit

[0048] 21. Second open end

[0049] 22. Second closed end

[0050] 30. Housing

[0051] 301. First first flow port on the first side

[0052] 302. First first flow port on the second side

[0053] 31. Second first flow port on the first side

[0054] 32. Second first flow port on the second side

[0055] 33. Latching boss

[0056] 34. Side cover plate

[0057] 35. Mounting fitting

[0058] 36. First end of the housing

[0059] 37. Protrusion

[0060] 38. Second end of the housing

[0061] 39. Hook-shaped part

[0062] 40. Mounting box cover Detailed implementation manners

[0063] Next, the technical solutions in the embodiments of the present application will be described in detail with reference to the accompanying drawings in the embodiments of the present application.

[0064] First, refer to Figure 1 , which shows a filter element unit for an air filter according to the present invention, also called the first filter element unit 10. This filter element unit is adapted to be installed in the housing 30 of the air filter. Figure 2 The structure of the housing 30 is shown in Figure 1 . The first filter element unit 10 in the implementation manner in

[0065] Refer toFigure 1 The first end cap 18 is disposed at the first end portion of each filter element body 17 to support and connect the first end portions of all the filter element bodies 17. The first end cap 18 includes a sealing edge 183 surrounding the first end portion. The sealing edge 183 is in the shape of a parallelogram, and each of the four corners of the parallelogram shape is an acute angle or an obtuse angle, rather than in the form of a right angle. The second end cap 19 may be disposed at the second end portion of each filter element body 17 to support and connect the second end portion. The first end cap 18 and the second end cap 19 are adapted to be assembled with the housing 30 to fix the first filter element unit 10. Figure 3 The second filter element unit 20 shown in

[0066] Simultaneously referring to Figure 1 and Figure 11 ,the first end cap 18 has: an end cap base 181, on which one or more through holes 182 are formed (specifically, four through holes, the number of which is the same as the number of the filter element bodies 17). Each through hole 182 is respectively communicated with the hollow interior of a corresponding filter element body 17; a sealing edge 183, which extends away from the filter element body 17 along the axial direction of the filter element body 17 from the surface of the end cap base 181, and the sealing edge 183 has a closed annular shape to surround all the through holes 182; and a sealing ring 184, as shown in Figure 11 ,the sealing ring 184 is an integral structure, including a first sealing portion and a second sealing portion that extends radially and perpendicularly from the first sealing portion. The first sealing portion is fixed to the outer peripheral surface of the sealing edge 183, and the second sealing portion is fixed to the surface of the end cap base 181.

[0067] Referring to Figure 11 ,a first protrusion 185 with a toothed cross-section is formed on the first sealing portion. The first protrusion 185 is inclined as a whole in the direction of the end cap base 181, which can improve the sealing performance. In addition, a second protrusion 186 with a semi-circular cross-section is formed on the second sealing portion. The second protrusion 186 protrudes in the direction away from the end cap base 181. It should be noted here that the sealing ring 184 is vulcanized or glued to the sealing edge 183, and an interference fit is achieved through the sealing structure formed by the specific shapes of the first protrusion 185 and the second protrusion 186 to ensure the reliability of the seal.

[0068] Referring to Figure 1 ,the first end cap 18 is open to communicate with the air outlet of the air filter for outputting the filtered clean air. This air outlet can be the Figure 2 first side second air outlet 31 of the housing in Figure 2From this perspective, it can also be referred to as the second left-side circulation port, so that clean air is conveyed to the second first-side circulation port 31 through the first end cap 18, and the second end cap 19 is closed. The closed structure of the second end cap 19 of the present invention is beneficial to the sealing of the air filter, and in cooperation with the sealing structure provided on the first end cap 18, the air filter of the present invention achieves a sealing effect significantly superior to that of the prior art filters. Obviously, in a specific usage scenario, the second first-side circulation port 31 can also be used as an air inlet.

[0069] Referring to Figure 1 , a groove 15 is provided on the outer peripheral edge of the first end cap 18. Referring to Figure 2 , a protrusion 37 is provided at a position of the housing 30 corresponding to the groove 15. The shape of the groove 15 is configured to match the shape of the protrusion 37 for positioning the filter element unit. The feature of the cooperation between the groove 15 and the protrusion 37 can prevent the incorrect installation of the filter element unit. Assuming that the filter element unit is installed with the wrong left-right direction, the presence of the protrusion 37 will cause the filter element unit not to be clamped in place, thus reminding the user of incorrect operation.

[0070] Referring to Figure 1 , a window 16 is provided on the outer peripheral edge of the second end cap 19. Referring to Figure 2 , a hook-shaped member 39 is provided at a position of the housing 30 corresponding to the window 16. The shape of the window 16 is configured to match the shape of the hook-shaped member 39 for fixing the filter element unit.

[0071] Referring to Figure 2 and Figure 5 , the hook-shaped member 39 includes a vertical portion and a horizontal hook portion extending from the vertical portion in a direction away from the first filter element unit 10. The horizontal hook portion can be inserted into the window 16. Referring to Figure 5 , the housing 30 is further provided with a locking boss 33. The locking boss 33 is provided in an area on one side of the hook-shaped member 39. When the first filter element unit 10 is installed in the housing 30, the hook-shaped member 39 and the locking boss 33 cooperate to fix the first filter element unit 10. The dimension of the window 16 in the vertical direction is greater than the dimension of the horizontal hook portion in the vertical direction, so that when the first filter element unit 10 is disassembled, the second end cap 19 can be lifted a certain distance to enable the bottom of the first filter element unit 10 to cross over the locking boss 33.

[0072] Referring to Figure 1 , along the axial direction of the filter element body 17, the position of the groove 15 and the position of the window 16 are generally aligned with each other. This positional relationship is beneficial to the positioning of the filter element unit during installation and the stability after installation.

[0073] Referring to Figure 1, each of the four filter elements 17 has the same shape. Four through holes 182 are formed in the end cap base 181. The four through holes 182 are respectively communicated with the hollow interiors of the four filter elements 17. And a plurality of reinforcing ribs 187 extending from the center of the end cap base 181 to the sealing edge 183 are formed on the surface of the end cap base 181. Specifically, there are four reinforcing ribs 187. The reinforcing ribs 187 are located in the area between the four through holes 182. In particular, there is one reinforcing rib 187 between every two through holes 182. In addition, preferably, in the central area of the end cap base 181, there are also four auxiliary ribs. The four auxiliary ribs are in the shape of a closed quadrilateral. One end of each auxiliary rib is connected to one reinforcing rib 187, and the other end is connected to another reinforcing rib. The arrangement of the reinforcing ribs and the auxiliary ribs can play a role in strengthening the support.

[0074] Referring to Figure 3 , an air filter of the present invention is shown. The air filter includes a housing 30 ( Figure 2 shown in). The air filter further includes a first filter element unit 10 and a second filter element unit 20 installed in the housing 30. The air filter may further include an installation box cover 40 installed between the first filter element unit 10 and the second filter element unit 20. One side of the installation box cover 40 abuts against the first closed end 12 of the first filter element unit 10, and the other side of the installation box cover 40 abuts against the second closed end 22 of the second filter element unit 20. The installation box cover 40 has a cooperative relationship with the sealing structure including the sealing edge 183 and the sealing ring 184 at the first end cap 18, which can better ensure the good sealing performance of the filter element unit.

[0075] Referring to Figure 5 , the locking boss 33 on the housing 30 can limit the movement of the filter element unit before the installation box cover 40 is installed. Therefore, the first function of the design that the installation box cover 40 is inserted between the two filter element units is to prevent the filter element unit from moving. Another function is to push the sealing ring 184 to fit tightly with the corresponding position of the housing to ensure the sealing performance.

[0076] Referring to Figure 5 , it should be noted that when the installation box cover 40 is opened, there will be a frictional force with the first filter element unit 10 and the second filter element unit 20, which will easily drive these two filter element units to lift and damage the filter element units. The function of the hook-shaped member 39 can effectively hook the corresponding filter element unit to prevent the filter element unit from moving.

[0077] Referring to Figure 2 and Figure 4, the housing 30 has a first flow port and two second flow ports. The air to be filtered enters the housing 30 through the first flow port, and after being filtered by the air filter, it flows out from the two second flow ports (specifically, the first-side second flow port 31 and the second-side second flow port 32), or the air to be filtered enters the housing 30 through the two second flow ports, and after being filtered by the air filter, it flows out from the first flow port.

[0078] The first filter element unit 10 includes a hollow cylindrical structure having a first open end 11 and a first closed end 12. The second filter element unit 20 includes a hollow cylindrical structure having a second open end 21 and a second closed end 22. The first closed end 12 and the second closed end 22 are arranged facing each other in the housing 30, and the first open end 11 and the second open end 21 are arranged opposite to each other to face opposite directions.

[0079] Referring to Figure 2 and Figure 4 , the housing 30 can be in the shape of a long cylinder, and the first-side second flow port 31 and the second-side second flow port 32 are respectively arranged at both ends of the long-cylindrical shape of the housing 30. The central axes of the first-side second flow port 31 and the second-side second flow port 32 are parallel to the central axis of the housing 30. The first open end 11 of the first filter element unit 10 leads to the first-side second flow port 31, and the second open end 21 of the second filter element unit 20 leads to the second-side second flow port 32.

[0080] Referring to Figure 2 , the above-mentioned first flow port can include two separate first flow ports, namely the first-side first flow port 301 and the second-side first flow port 302. The first-side first flow port 301 communicates with the outer periphery of the cylindrical structure of the first filter element unit 10, and the second-side first flow port 302 communicates with the outer periphery of the cylindrical structure of the second filter element unit 20. Of course, it can be understood that the number of the first flow ports can be only one. Through the first-side first flow port 301 and the second-side first flow port 302, the air to be filtered can be separately introduced into the dirty-side regions inside the first filter element unit 10 and the second filter element unit 20, for example.

[0081] The present invention provides a method for assembling and disassembling an air filter, and the method may include the following assembling steps: The first step is to provide a housing 30 of the air filter, and a protrusion 37, a hook-shaped member 39, and a locking boss 33 provided on one side of the hook-shaped member 39 are arranged inside the housing; The second step is to provide a first filter element unit 10, which has one or more filter element bodies 17, and a first end cap 18 and a second end cap 19 respectively arranged at two ends of the filter element body 17. A groove 15 is arranged on the outer peripheral edge of the first end cap 18, and a window 16 is arranged on the outer peripheral edge of the second end cap 19; The third step is to place the first filter element unit 10 into the inner space of the housing 30, so that the first filter element unit 10 moves a certain distance along the axial direction towards the area of the housing for receiving the first end cap 18, so that the groove 15 is snapped together with the protrusion 37, and the hook-shaped member 39 is inserted into the window 16; The fourth step is to provide and install a second filter element unit 20 in the same manner as the second step and the third step; And the fifth step is to insert the installation box cover 40 between the first filter element unit 10 and the second filter element unit 20.

[0082] The following will refer to Figures 4 to 10 , and describe the steps of the method for disassembling the air filter of the present invention. Starting from the state shown in Figure 4 , first disassemble the side cover plate 34 shown in Figure 4 . Then perform the sixth step of the solution of the present invention. Referring to Figure 5 , take out the installation box cover 40 from between the first filter element unit 10 and the second filter element unit 20.

[0083] Referring to Figure 6 and Figure 7 , perform the seventh step. Lift the second end cap 19 of the first filter element unit 10 a certain distance, for example, lift it by 2 mm, so that the bottom of the first filter element unit 10 crosses over the locking boss 33 ( Figure 7 shown), and then referring to Figure 8 and Figure 9 , move the first filter element unit 10 a certain distance along the axial direction away from the area of the housing for receiving the first end cap 18, for example, move it by 11 mm, so that the groove 15 is disengaged from the protrusion 37, and the hook-shaped member 39 is disengaged from the window 16 (simultaneously referring to Figure 9 and Figure 5 this step can be easily understood), thereby taking out the first filter element unit 10 from the inner space of the housing 30 ( Figure 10 shows the taken-out state); The eighth step is to take out the second filter element unit 20 in the same manner as the seventh step.

[0084] The air filter of the present invention can be applied to various occasions. For example, it can be installed in the engine compartment of a vehicle.

[0085] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An air filter, characterized in that, The air filter includes: A housing (30) having a first flow port and two second flow ports. The air to be filtered enters the housing (30) through the first flow port, and after being filtered by the air filter, flows out through the two second flow ports, or the air to be filtered enters the housing (30) through the two second flow ports, and after being filtered by the air filter, flows out through the first flow port; A first filter element unit (10) including a hollow cylindrical structure having a first open end (11) and a first closed end (12); A second filter element unit (20) including a hollow cylindrical structure having a second open end (21) and a second closed end (22); Wherein, the first closed end (12) and the second closed end (22) are arranged facing each other in the housing (30), and the first open end (11) and the second open end (21) are arranged opposite to each other to face opposite directions.

2. The air filter according to claim 1, characterized in that, The housing (30) is in the shape of a long cylinder, and the two second flow ports are respectively arranged at both ends of the long cylindrical shape of the housing (30). The two second flow ports are respectively a first-side second flow port (31) and a second-side second flow port (32); Wherein, the first open end (11) of the first filter element unit (10) leads to the first-side second flow port (31), and the second open end (21) of the second filter element unit (20) leads to the second-side second flow port (32).

3. The air filter according to claim 1, characterized in that, The first flow port includes two separate first flow ports, namely a first-side first flow port (301) and a second-side first flow port (302). The first-side first flow port (301) communicates with the outer periphery of the cylindrical structure of the first filter element unit (10), and the second-side first flow port (302) communicates with the outer periphery of the cylindrical structure of the second filter element unit (20).

4. The air filter according to claim 1, wherein The first filter element unit (10) includes: One or more filter element bodies (17) made of a filtering material. Each filter element body (17) is a hollow cylindrical structure extending along the axial direction and having a first end and a second end; A first end cap (18) located at the first open end (11), the first end cap (18) supporting and connecting the first end; and A second end cap (19) located at the first closed end (12), the second end cap (19) supporting and connecting the second end; Wherein, the first end cap (18) and the second end cap (19) are adapted to be assembled with the housing (30) to fix the first filter element unit (10); And, the second filter element unit (20) has a structure mirror-symmetrical to that of the first filter element unit (10).

5. The air filter according to claim 4, wherein A groove (15) is provided on the outer peripheral edge of the first end cap (18), Wherein, a protrusion (37) is provided at a position of the housing (30) corresponding to the groove (15), and the shape of the groove (15) is configured to match the shape of the protrusion (37) for positioning the first filter element unit (10).

6. The air filter according to claim 4 or 5, characterized in that a window (16) is provided on the outer peripheral edge of the second end cap (19), wherein, a hook-shaped member (39) is provided at a position of the housing (30) corresponding to the window (16), and the shape of the window (16) is configured to match the shape of the hook-shaped member (39) for fixing the first filter element unit (10).

7. The air filter according to claim 6, characterized in that the hook-shaped member (39) includes a vertical portion and a horizontal hook portion extending from the vertical portion in a direction away from the first filter element unit (10), and the horizontal hook portion can be inserted into the window (16), wherein, the housing (30) is further provided with a locking boss (33), the locking boss (33) is provided in an area on one side of the hook-shaped member (39), and after the first filter element unit (10) is installed in the housing (30), the hook-shaped member (39) and the locking boss cooperate to fix the first filter element unit (10), wherein, and the dimension of the window (16) in the vertical direction is greater than the dimension of the horizontal hook portion in the vertical direction, so that when the first filter element unit (10) is disassembled, the second end cap (19) can be lifted a certain distance to make the bottom of the first filter element unit (10) cross over the locking boss (33).

8. The air filter according to claim 4 or 5, characterized in that the first filter element unit (10) includes four filter element bodies, and the shape of each filter element body (17) is the same, and the first end cap (18) has: a cap base (181), four through holes (182) are formed on the cap base (181), and the four through holes (182) are respectively communicated with the hollow interiors of the four filter element bodies (17); a sealing edge (183), the sealing edge (183) extends away from the filter element body (17) along the axial direction of the filter element body (17) from the surface of the cap base (181), and the sealing edge (183) has a closed annular shape to surround the four through holes (182); and a sealing ring (184), the sealing ring (184) is an integral structure, including a first sealing portion and a second sealing portion extending radially perpendicular from the first sealing portion, the first sealing portion is fixed to the outer peripheral surface of the sealing edge (183), and the second sealing portion is fixed to the surface of the cap base (181). Wherein, a first protrusion (185) with a toothed cross-section is formed on the first sealing portion, and the first protrusion (185) is inclined as a whole in the direction of the end cap base (181); and wherein, a second protrusion (186) with a semi-circular cross-section is formed on the second sealing portion, and the second protrusion (186) protrudes in the direction away from the end cap base (181).

9. The air filter according to claim 8, wherein The air filter further includes a mounting box cover (40) installed between the first filter element unit (10) and the second filter element unit (20), one side of the mounting box cover (40) abuts against the first closed end (12), and the other side of the mounting box cover (40) abuts against the second closed end (22).

10. A method for assembling and disassembling an air filter, characterized in that, The method includes the following assembly steps: The first step is to provide a housing (30) of the air filter, and a protrusion (37), a hook-shaped member (39), and a locking boss (33) provided on one side of the hook-shaped member (39) are arranged inside the housing. The second step is to provide a first filter element unit (10), the first filter element unit having one or more filter element bodies (17) and a first end cap (18) and a second end cap (19) respectively provided at two ends of the filter element body (17), a groove (15) is provided on the outer peripheral edge of the first end cap (18), and a window (16) is provided on the outer peripheral edge of the second end cap (19). The third step is to place the first filter element unit (10) into the internal space of the housing (30), such that the first filter element unit (10) moves a distance along the axial direction towards the area of the housing for receiving the first end cap (18), so that the groove (15) is snapped together with the protrusion (37), and the hook-shaped member (39) is inserted into the window (16). The fourth step is to provide and install a second filter element unit (20) in the same manner as the second step and the third step. And The fifth step is to insert the mounting box cover (40) between the first filter element unit (10) and the second filter element unit (20).

11. The method for assembling and disassembling an air filter according to claim 10, characterized in that, The method further includes the following disassembly steps: The sixth step is to remove the mounting box cover (40) from between the first filter element unit (10) and the second filter element unit (20). The seventh step is to lift the second end cap (19) of the first filter element unit (10) by a distance, so that the bottom of the first filter element unit (10) crosses over the locking boss (33), and then move the first filter element unit (10) a distance along the axial direction away from the area of the housing for receiving the first end cap (18), so that the groove (15) is disengaged from the protrusion (37), and the hook-shaped member (39) is disengaged from the window (16), thereby removing the first filter element unit (10) from the internal space of the housing (30). The eighth step is to remove the second filter element unit (20) in the same manner as the seventh step.

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