A rotatable air filter element and method of manufacturing the same

By designing a combined structure of filter frame, air inlet cover, pressing component and sealing component in the air filter element, the problems of complex installation and poor sealing are solved, and convenient installation and efficient filtration are achieved.

CN116651090BActive Publication Date: 2025-11-04ZHANGJIAGANG DEYIZHOU FILTER EQUIP CO LTD
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Patent Information

Application Number
CN202310579164.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-05-22
Publication Date
2025-11-04
Estimated Expiration
2043-05-22

AI Technical Summary

Technical Problem

Existing rotatable air filter elements are complicated to install and have poor sealing, leading to gas leakage and poor filtration effect.

Method used

A structure including a filter frame, an air inlet cover, a filter element, a pressing component, and a sealing component is designed. The air inlet cover is stably fixed and sealed through components such as threaded connections and elastic compression rods, thereby enhancing the sealing performance.

Benefits of technology

It improves the ease of installation and sealing of the air filter, prevents gas leakage, and enhances the filtration effect.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a rotatable air filter element and a processing method thereof, and relates to the technical field of air filter elements, which comprises a filter frame, the end of the filter frame is fixedly connected with a circular ring block, the inside of the circular ring block is provided with an air inlet cover, the inside of the filter frame is provided with a filter element, the surface of the air inlet cover is fixedly connected with a disc, and the surface of the disc is fixedly connected with a rotating frame. The inside of the circular ring block is provided with the air inlet cover, air flows into the inside of the filter frame through the air inlet cover, is filtered by the filter element, the two air inlet covers are provided with pressing components at the end far from each other, the air inlet cover is fixedly pressed by the pressing component, the inner wall of the circular ring block is in threaded connection with the air inlet cover, so that the air inlet cover can be disassembled and installed, the surface of the air inlet cover is fixedly connected with the rotating frame through the disc, the air inlet cover is conveniently rotated in the inside of the circular ring block through the rotating frame, and the inside of the circular ring block is provided with a sealing component.
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Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air filter element, in particular to a rotatable air filter element and a processing method thereof. BACKGROUND

[0002] With the continuous progress of science and technology and the continuous improvement of economic level, people's environmental protection consciousness is constantly enhanced, the filter equipment develops rapidly, the filter element is to make the polluted water, air clean to the state required by production and life, that is, to make the water, air reach a certain degree of cleanliness, remove the solid particles in the water, air, kill bacteria, filter out harmful chemical components, and the filter elements on the market are various;

[0003] The rotatable air filter element of the prior art is very complex to install, and the sealing performance of the rotatable air filter element is poor. When air is filtered, gas leaks, resulting in poor air filtering effect and inconvenient use. Therefore, a rotatable air filter element and a processing method thereof are provided. SUMMARY

[0004] To solve the above technical problems, the present application provides a rotatable air filter element and a processing method thereof, which comprises a filter frame, the end of the filter frame is fixedly connected with a circular ring block, the inside of the circular ring block is provided with an air inlet cover, the inside of the filter frame is provided with a filter element, the surface of the air inlet cover is fixedly connected with a disc, the surface of the disc is fixedly connected with a rotating frame, and the rotatable air filter element and the processing method thereof further comprise:

[0005] The number of the compression parts is two, one end of the two circular ring blocks away from each other is provided with a compression part, the air inlet cover is arranged at both ends of the filter frame, the gas enters the inside of the filter frame through the air inlet cover, the air is filtered through the filter element, the outer ring of the air inlet cover is in contact with the inner wall of the circular ring block, so as to avoid the air leaking out through the gap between the air inlet cover and the circular ring block, thereby reducing the filtering effect of the filter element, the compression part is located at the outer end of the filter frame, and the compression part is located at the outer end of the filter frame.

[0006] The air inlet cover is provided with a sealing part at one end close to the filter frame, and the sealing part is arranged in the inside of the circular ring block, one end of the air inlet cover away from the disc is provided with an elastic extrusion rod, and the other end of the elastic extrusion rod away from the air inlet cover is in contact with the end of the filter element.

[0007] Further, the pressing component comprises a triangular movable rod, a round hole block, a bent frame, an elastic rod, a cylindrical rod, a movable round frame, a conical block, a round hole, an extension rod, a stress rod and a sealing gasket, the round hole block is fixedly connected with the surface of the air inlet cover, the elastic rod is in sliding connection with the inner wall of the round hole block, the end of the elastic rod away from the round hole block is fixedly connected with the bent frame, a plurality of bent frames are arranged on the surface of the air inlet cover, the end of the bent frame is in contact with the surface of the air inlet cover, so that the air inlet cover is prevented from falling off due to vibration, and the stability between the air inlet cover and the round ring block is further increased, the center end of the triangular movable rod is hinged with the cylindrical rod, the end of the triangular movable rod is hinged with the end of the elastic rod, the inside of the movable round frame is hinged with the surface of the cylindrical rod, the surface of the air inlet cover is provided with a round hole, the stress rod is fixedly connected with the extension rod, and the sealing gasket is in contact with the end of the stress rod.

[0008] The stress rod is in contact with the inner wall of the round hole, and the elastic rod penetrates through the round hole block and extends to the outer end of the round hole block.

[0009] Further, the outer surface of the conical block is adapted to the inner wall of the round hole, the end of the conical block away from the bent frame is in contact with the end of the stress rod, the extension rod extends out of the outer end of the air inlet cover through the round hole, and the sealing gasket is in contact with the inner wall of the round hole.

[0010] Further, the end of the triangular movable rod away from the cylindrical rod is hinged with the end of the elastic rod, the number of the movable round frames is two, and the two movable round frames are symmetrically arranged with the cylindrical rod as the center.

[0011] Further, the sealing component comprises a sealing ring, a positioning frame, a semicircular groove and a semicircular block, the positioning frame is fixedly connected with the inner wall of the round ring block, the sealing ring is in contact with the inner wall of the round ring block, the semicircular block is fixedly connected with the positioning frame, and the semicircular groove is arranged on the surface of the sealing ring.

[0012] Further, the semicircular groove is located at the end of the sealing ring close to the positioning frame, the semicircular block is in contact with the inner wall of the semicircular groove, the sealing ring is in contact with the surface of the positioning frame, and the air inlet cover is in contact with the surface of the sealing ring.

[0013] Further, the number of the extension rods corresponds to that of the semicircular blocks, the extension rods are aligned with the semicircular blocks, and the end of the extension rod away from the stress rod is in contact with the surface of the sealing ring.

[0014] Further, a processing method of a rotatable air filter element comprises the following steps:

[0015] S1: a proper amount of preservative is added to deionized water, a proper amount of amino acid is added after stirring uniformly, and stirring is continued until mixing is uniform;

[0016] S2: In the above mixed solution, a suitable amount of hydrophilic polymer, a suitable amount of salt and a suitable amount of surfactant are added in turn, and stirring and mixing are carried out by heating to about 40 DEG C;

[0017] S3: Further adding a suitable amount of polyamine organic matter, adjusting the pH value of the solution to about 11, and preparing a PM2.5 trapping agent;

[0018] S4: A filter cartridge is made, the filter cartridge is hollow inside, one end is an air inlet end, the other end is an air outlet end, an activated carbon filter element is arranged in the filter cartridge, the prepared PM2.5 trapping agent is sprayed on the surface of the filter element, and the filter element is dried at room temperature after spraying.

[0019] The present application has the beneficial effects:

[0020] The air flows into the inside of the filter frame through the air inlet cover, and is filtered by the filter element, the air inlet cover is provided with a pressing part at the end away from the other air inlet cover, the air inlet cover is extruded and fixed by the pressing part, the air inlet cover is screw-connected with the inner wall of the circular ring block, so that the air inlet cover can be disassembled and installed, the rotary frame is fixedly connected with the surface of the air inlet cover, the rotary frame facilitates the rotation of the air inlet cover in the circular ring block, and the sealing part is arranged in the circular ring block.

[0021] When the air inlet cover is screw-connected in the inside of the circular ring block, the elastic extrusion rod contacts the end of the filter element, the elastic extrusion rod extrudes and fixes the filter element along with the deepening of the air inlet cover, the stability of the filter element in the filter frame is improved, when the air inlet cover is separated from the inner wall of the circular ring block, the filter element moves out of the outer end of the filter frame through the elasticity of the elastic extrusion rod, so that the filter element can be installed and cleaned.

[0022] When the movable circular frame is extruded, the movable circular frame extrudes the cylindrical rod to shrink towards the center of the circular ring block, the triangular movable rod is pulled to shrink through the extrusion of the cylindrical rod, the bending frame is separated from the surface of the air inlet cover through the shrinking of the elastic rod, after the air inlet cover is installed in the inside of the circular ring block, the movable circular frame is reset, the triangular movable rod is expanded through the resetting of the cylindrical rod, the elastic rod pushes the bending frame to move through the expansion of the triangular movable rod, the bending frame contacts the surface of the air inlet cover, the air inlet cover is extruded and fixed, and the air inlet cover is prevented from falling off.

[0023] When the bending frame contacts the surface of the air inlet cover, the conical block is pushed into the inside of the circular hole, the force rod is extruded and pushed to extend the surface contact of the sealing ring, the sealing ring is deformed through the extrusion of the extension rod, the sealing ring is extruded to further increase the sealing property between the sealing ring and the air inlet cover.

[0024] The sealing ring is limited by the positioning frame at the inner ring of the annular block, the end of the sealing ring is in contact with the inner wall of the annular block, and the sealing ring is clamped with the semicircular block through the semicircular groove, so that the sealing ring is very convenient to install in the inner part of the annular block. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a whole structure schematic view of the application;

[0026] Figure 2 It is a whole structure schematic view of the application;

[0027] Figure 3 It is a right view sectional structure schematic view of the filter frame of the application;

[0028] Figure 4 It is a top view sectional structure schematic view of the annular block of the application;

[0029] Figure 5 It is a whole structure schematic view of the elastic extrusion rod of the application;

[0030] Figure 6 It is a whole structure schematic view of the movable circular frame of the application;

[0031] Figure 7 It is an enlarged structure schematic view of A part in the application; Figure 6

[0032] Figure 8 It is a whole structure schematic view of the stress rod of the application;

[0033] Figure 9 It is a whole structure schematic view of the positioning frame of the application;

[0034] Figure 10 It is a whole structure schematic view of the sealing ring of the application.

[0035] 1, filter frame; 2, annular block; 3, air inlet cover; 4, filter core; 5, disc; 6, rotating frame; 7, sealing part; 8, pressing part; 9, elastic extrusion rod; 10, triangular movable rod; 11, round hole block; 12, bent frame; 13, elastic rod; 14, cylindrical rod; 15, movable circular frame; 17, conical block; 18, round hole; 19, extension rod; 20, stress rod; 21, sealing gasket; 30, sealing ring; 31, positioning frame; 32, semicircular groove; 33, semicircular block. DETAILED DESCRIPTION

[0036] ​The application is further described in detail below with the accompanying drawings and specific embodiments. The embodiments of the application are given for illustrative and descriptive purposes only and are not intended to be exhaustive or to limit the application to the forms disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Embodiments are chosen and described in order to provide a better understanding of the principles and applications of the application and to enable others skilled in the art to understand the application in order to design various embodiments with various modifications for particular uses.

[0037] Embodiment 1, please refer to Figures 1-8 The application is a rotatable air filter element and its processing method, comprising a filter frame 1, the end of the filter frame 1 is fixedly connected with a circular block 2, the inside of the circular block 2 is provided with an air inlet cover 3, the inside of the filter frame 1 is provided with a filter element 4, the surface of the air inlet cover 3 is fixedly connected with a disc 5, the surface of the disc 5 is fixedly connected with a rotating frame 6, further comprising:

[0038] The number of the compression components 8 is two, the ends of the two circular blocks 2 away from each other are provided with the compression components 8, the inside of the circular block 2 is provided with the air inlet cover 3, the air will flow into the inside of the filter frame 1 through the air inlet cover 3, the filter element 4 is used for filtering, the ends of the two air inlet covers 3 away from each other are provided with the compression components 8, the air inlet cover 3 is fixed by being extruded by the compression components 8, the air inlet cover 3 is threadedly connected with the inner wall of the circular block 2, so as to dismount and install the air inlet cover 3, the rotating frame 6 is fixedly connected with the disc 5 on the surface of the air inlet cover 3, the rotating frame 6 facilitates the rotation of the air inlet cover 3 in the inside of the circular block 2, the sealing component 7 is arranged in the inside of the circular block 2, the sealing component 7 increases the sealing between the circular block 2 and the air inlet cover 3, the compression component 8 is located at the outer ring end of the air inlet cover 3, and the compression component 8 is located at the outer end of the filter frame 1;

[0039] The end of the air inlet cover 3 close to the filter frame 1 is provided with the sealing component 7, and the sealing component 7 is arranged in the inside of the circular block 2, the end of the air inlet cover 3 away from the disc 5 is provided with the elastic extrusion rod 9, the end of the elastic extrusion rod 9 away from the air inlet cover 3 is in contact with the end of the filter element 4, when the air inlet cover 3 is threadedly connected in the inside of the circular block 2, the elastic extrusion rod 9 will be in contact with the end of the filter element 4, the elastic extrusion rod 9 will extrude and fix the filter element 4 with the deepening of the air inlet cover 3, the stability of the filter element 4 in the inside of the filter frame 1 is improved, when the air inlet cover 3 is separated from the inner wall of the circular block 2, the filter element 4 will move out to the outer end of the filter frame 1 through the elasticity of the elastic extrusion rod 9, so as to install and clean the filter element 4.

[0040] The compression component 8 comprises a triangular movable rod 10, a round hole block 11, a bent frame 12, an elastic rod 13, a cylindrical rod 14, a movable round frame 15, a conical block 17, a round hole 18, an extension rod 19, a stress rod 20 and a sealing gasket 21, the round hole block 11 is fixedly connected with the surface of the air inlet cover 3, the elastic rod 13 is slidably connected with the inner wall of the round hole block 11, the end of the elastic rod 13, away from the round hole block 11, is fixedly connected with the bent frame 12, the conical block 17 is fixedly connected with the end of the bent frame 12, the center end of the triangular movable rod 10 is hinged with the cylindrical rod 14, the end of the triangular movable rod 10 is hinged with the end of the elastic rod 13, the inside of the movable round frame 15 is hinged with the surface of the cylindrical rod 14, the surface of the air inlet cover 3 is provided with the round hole 18, when the movable round frame 15 is extruded, the movable round frame 15 extrudes the cylindrical rod 14 to shrink to the center of the circular ring block 2, the triangular movable rod 10 is pulled to shrink by the extrusion of the cylindrical rod 14, the bent frame 12 is separated from the surface of the air inlet cover 3 by the shrinkage of the elastic rod 13, after the air inlet cover 3 is installed to the inside of the circular ring block 2, the movable round frame 15 is reset, the triangular movable rod 10 is expanded by the reset of the cylindrical rod 14, the elastic rod 13 pushes the bent frame 12 to move by the expansion of the triangular movable rod 10, the bent frame 12 is in contact with the surface of the air inlet cover 3, the air inlet cover 3 is extruded and fixed, so that the air inlet cover 3 is prevented from falling off, the stress rod 20 is fixedly connected with the extension rod 19, and the sealing gasket 21 is in contact with the end of the stress rod 20.

[0041] The stress rod 20 is in contact with the inner wall of the round hole 18, and the elastic rod 13 penetrates through the round hole block 11 and extends to the outer end of the round hole block 11.

[0042] The outer surface of the conical block 17 is adapted to the inner wall of the round hole 18, the end of the conical block 17, away from the bent frame 12, is in contact with the end of the stress rod 20, the extension rod 19 extends out of the outer end of the air inlet cover 3 through the round hole 18, and the sealing gasket 21 is in contact with the inner wall of the round hole 18.

[0043] The end of the triangular movable rod 10, away from the cylindrical rod 14, is hinged with the end of the elastic rod 13, the number of the movable round frames 15 is two, and the two movable round frames 15 are symmetrically arranged with the cylindrical rod 14 as the center.

[0044] A processing method of a rotatable air filter element, comprising the following steps:

[0045] S1: adding an appropriate amount of preservative into deionized water, stirring uniformly, then adding an appropriate amount of amino acid, and continuously stirring until mixed uniformly;

[0046] S2: adding an appropriate amount of hydrophilic polymer, an appropriate amount of salt and an appropriate amount of surfactant into the mixed solution in sequence, and stirring and mixing by heating to about 40 DEG C;

[0047] S3: adding an appropriate amount of polyamine organic matter, adjusting the pH value of the solution to about 11, and preparing a PM2.5 trapping agent.

[0048] S4: making filter cartridge, filter cartridge inside hollow, one end is air inlet end, the other end is air outlet end, filter cartridge is equipped with activated carbon filter element, the prepared PM2.5 capture agent is sprayed on the surface of filter element, and normal temperature drying is carried out after spraying.

[0049] Example 2, the difference characteristics of example 1 are as shown: Figures 9-10 The sealing part 7 includes a sealing ring 30, a positioning frame 31, a semicircular groove 32 and a semicircular block 33, the positioning frame 31 is fixedly connected with the inner wall of the annular block 2, the sealing ring 30 is in contact with the inner wall of the annular block 2, and the semicircular block 33 is fixedly connected with the positioning frame 31.When the bending frame 12 is in contact with the surface of the air inlet cover 3, the conical block 17 is pushed into the inside of the circular hole 18, the stress rod 20 is extruded and pushed to extend the rod 19 to be in contact with the surface of the sealing ring 30, the sealing ring 30 is deformed by the extrusion of the extending rod 19, the sealing ring 30 is extruded to the air inlet cover 3, further increasing the sealing property between the sealing ring and the air inlet cover 3, and the semicircular groove 32 is arranged on the surface of the sealing ring 30.

[0050] The semicircular groove 32 is located at one end of the sealing ring 30 close to the positioning frame 31, the semicircular block 33 is in contact with the inner wall of the semicircular groove 32, the sealing ring 30 is in contact with the surface of the positioning frame 31, and the air inlet cover 3 is in contact with the surface of the sealing ring 30, the sealing ring 30 is limited in the inner ring of the annular block 2 through the positioning frame 31, the end portion of the sealing ring 30 is in contact with the inner wall of the annular block 2, and the sealing ring 30 is clamped with the semicircular block 33 through the semicircular groove 32, so that the sealing ring 30 is very convenient to install in the inside of the annular block 2.

[0051] The extending rod 19 and the semicircular block 33 correspond to each other in number, the extending rod 19 and the semicircular block 33 are aligned with each other, and the end, away from the stress rod 20, of the extending rod 19 is in contact with the surface of the sealing ring 30.

[0052] One specific application of the embodiment is that when the air inlet cover 3 is screwed in the inner part of the ring block 2, the elastic extrusion rod 9 will contact the end of the filter element 4, and the elastic extrusion rod 9 will extrude and fix the filter element 4 as the air inlet cover 3 goes deeper, thereby improving the stability of the filter element 4 in the filter frame 1. When the air inlet cover 3 is separated from the inner wall of the ring block 2, the filter element 4 will move out of the outer end of the filter frame 1 through the elasticity of the elastic extrusion rod 9, so as to install and clean the filter element 4. When the movable circular frame 15 is extruded, the movable circular frame 15 will extrude the cylindrical rod 14 to shrink towards the center of the ring block 2. The triangular movable rod 10 will pull the elastic rod 13 to shrink through the extrusion of the cylindrical rod 14. The bent frame 12 will separate from the surface of the air inlet cover 3 through the shrinkage of the elastic rod 13. After the air inlet cover 3 is installed in the inner part of the ring block 2, the movable circular frame 15 is reset, the triangular movable rod 10 is expanded through the reset of the cylindrical rod 14, the elastic rod 13 pushes the bent frame 12 to move through the expansion of the triangular movable rod 10, the bent frame 12 contacts the surface of the air inlet cover 3, extrudes and fixes the air inlet cover 3, and avoids the air inlet cover 3 from falling off. When the bent frame 12 contacts the surface of the air inlet cover 3, the conical block 17 will be pushed into the inner part of the circular hole 18, the stressed rod 20 is extruded and pushed to extend the rod 19 to contact the surface of the sealing ring 30, the sealing ring 30 is deformed through the extrusion of the extension rod 19, the sealing ring 30 is extruded to further increase the sealing between the sealing ring and the air inlet cover 3, and the sealing ring 30 is limited in the inner ring of the ring block 2 through the positioning frame 31. The end of the sealing ring 30 contacts the inner wall of the ring block 2, and the sealing ring 30 is conveniently installed in the inner part of the ring block 2 through the clamping of the semicircular groove 32 and the semicircular block 33.

[0053] Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art and related fields without creative labor should belong to the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application, such as without special description and limitation, are implemented according to the conventional means in the art.

Claims

1. A rotatable air filter, comprising a filter frame (1), an annular block (2) fixedly connected to the end of the filter frame (1), an air inlet cover (3) disposed inside the annular block (2), a filter element (4) disposed inside the filter frame (1), a disc (5) fixedly connected to the surface of the air inlet cover (3), and a rotating frame (6) fixedly connected to the surface of the disc (5), characterized in that, Also includes: The clamping component (8) is provided in two parts. The clamping component (8) is provided at one end of the two annular blocks (2) that are far apart from each other. The clamping component (8) is located at the outer end of the air inlet cover (3) and at the outer end of the filter frame (1). The sealing component (7) is provided at one end of the air inlet cover (3) near the filter frame (1), and the sealing component (7) is located inside the annular block (2). An elastic compression rod (9) is provided at one end of the air inlet cover (3) away from the disc (5). The end of the elastic compression rod (9) away from the air inlet cover (3) contacts the end of the filter element (4). The pressing component (8) includes a triangular movable rod (10), a round hole block (11), a bent frame (12), a spring rod (13), a cylindrical rod (14), a movable round frame (15), a conical block (17), a round hole (18), an extension rod (19), a force-bearing rod (20), and a sealing gasket (21). The round hole block (11) and the air inlet cover (1) are connected to the filter element (2). 3) The surface is fixedly connected, the spring rod (13) is slidably connected to the inner wall of the round hole block (11), the end of the spring rod (13) away from the round hole block (11) is fixedly connected to the bending frame (12), the conical block (17) is fixedly connected to the end of the bending frame (12), the center end of the triangular movable rod (10) is hinged to the cylindrical rod (14), the end of the triangular movable rod (10) is hinged to the end of the spring rod (13), the interior of the movable round frame (15) is hinged to the surface of the cylindrical rod (14), the surface of the air inlet cover (3) is provided with a round hole (18), the force rod (20) is fixedly connected to the extension rod (19), and the sealing gasket (21) is in contact with the end of the force rod (20); The force-bearing rod (20) contacts the inner wall of the circular hole (18), and the spring rod (13) passes through the circular hole block (11) and extends to the outer end of the circular hole block (11).

2. The rotatable air filter element according to claim 1, characterized in that: The outer surface of the conical block (17) is adapted to the inner wall of the circular hole (18). The end of the conical block (17) away from the bending frame (12) is in contact with the end of the force rod (20). The extension rod (19) extends out of the outer end of the air inlet cover (3) through the circular hole (18). The sealing gasket (21) is in contact with the inner wall of the circular hole (18).

3. A rotatable air filter element according to claim 2, characterized in that: The end of the triangular movable rod (10) away from the cylindrical rod (14) is hinged to the end of the spring rod (13). There are two movable round frames (15), which are respectively located at the corresponding end faces of the cylindrical rod (14).

4. A rotatable air filter element according to claim 3, characterized in that: The sealing component (7) includes a sealing ring (30), a positioning frame (31), a semi-circular groove (32) and a semi-circular block (33). The positioning frame (31) is fixedly connected to the inner wall of the ring block (2). The sealing ring (30) is in contact with the inner wall of the ring block (2). The semi-circular block (33) is fixedly connected to the positioning frame (31). The semi-circular groove (32) is formed on the surface of the sealing ring (30).

5. A rotatable air filter element according to claim 4, characterized in that: The semicircular groove (32) is located at one end of the sealing ring (30) near the positioning frame (31), the semicircular block (33) is in contact with the inner wall of the semicircular groove (32), the sealing ring (30) is in contact with the surface of the positioning frame (31), and the air inlet cover (3) is in contact with the surface of the sealing ring (30).

6. A rotatable air filter element according to claim 5, characterized in that: The number of the extension rods (19) corresponds to the number of the semicircular blocks (33), the extension rods (19) and the semicircular blocks (33) are aligned with each other, and the end of the extension rod (19) away from the force rod (20) is in contact with the surface of the sealing ring (30).

Citation Information

Patent Citations

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