Air purifier with filter element capable of being replaced quickly

By designing quickly replacing structures, cleaning structures, and disassembly structures in the air purifier, the filter element replacement, poor cleaning effect, and disassembly of negative ion generators have been solved, and a more efficient filter element replacement, cleaning and disassembly process.

CN119367898AActive Publication Date: 2025-01-28ZHEJIANG HONGDA PURIFICATION TECH CO LTD

Patent Information

Application Number
CN202411859365.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-17
Publication Date
2025-01-28
Estimated Expiration
2044-12-17

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    Figure CN119367898A_ABST
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Abstract

The air purifier comprises a machine body, a self-locking roller is fixedly mounted on the outer side of the lower end of the machine body, an air outlet pipe is fixedly mounted on the middle side of the left end of the machine body, and a fan is arranged in the air outlet pipe; the quick replacement structure is mounted in the middle of the machine body and is used for replacing the filter cartridge; the dismounting structure is fixedly mounted on the left side of the interior of the machine body and used for dismounting air vitamins; and the cleaning structure is mounted at the right end of the machine body and used for cleaning the air filter screen. The quick replacement structure comprises a fixing seat, the fixing seat is fixedly installed on the lower side of the interior of the machine body, and a first spring is arranged in the fixing seat. According to the air purifier with the rapidly-replaced filter element, the filter element can be conveniently and rapidly replaced, the filter screen can be conveniently cleaned, and the negative-ion generator can be conveniently disassembled.
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Description

Technical Field

[0001] The invention relates to the technical field of air purifiers, and in particular to an air purifier with a quick-replaceable filter element. Background Art

[0002] An air purifier is a device that can absorb, decompose or transform various air pollutants. Its main purpose is to improve air cleanliness. Air purifiers are widely used in homes, offices, hotels, hospitals and other places. They can effectively remove pollutants such as PM2.5, dust, pollen, odor, formaldehyde, bacteria and allergens. During the use of the air purifier, a quick replacement structure is required to replace the filter element, thereby improving the use effect of the air purifier. For example: China Patent Authorization Announcement No. CN103566696B discloses an air purifier, including a closed box, a primary filter, an electrostatic precipitator, a dust collection bucket, a negative ion generator, and an electric control box. The upper part of the closed box is provided with an air inlet, the lower part of the closed box is provided with an air outlet, a fan is provided in the air outlet, the fan is connected to the electric control box, the primary filter, the electrostatic precipitator, the dust collection bucket, and the negative ion generator are arranged in the closed box from top to bottom, the primary filter is located below the air inlet, the outer wall of the dust collection bucket is tightly connected to the inner wall of the closed box, a membrane filter element is provided in the dust collection bucket, a certain distance is formed between the outer wall of the membrane filter element and the inner wall of the dust collection bucket to form a dust collection area, a membrane center pipe is provided inside the membrane filter element, the bottom of the membrane center pipe is connected to the air outlet, and the negative ion generator is located at the air outlet. The present invention can efficiently remove dust in the air and improve air quality.

[0003] China's patent authorization announcement number CN109351086B discloses a large air purifier, including a housing, an air inlet vortex fan, an air outlet vortex fan, a filter heating component and a control board, the control board is mounted on the housing; a baffle wall is formed in the housing to divide the housing into a processing chamber and a clean air chamber, and the housing is formed with an air inlet connected to the processing chamber and an air outlet connected to the clean air chamber; the processing chamber is equipped with an air inlet vortex fan, and the clean air chamber is equipped with an air outlet vortex fan; the filter heating component is movably fixed in the housing and penetrates the baffle wall, so that the processing chamber and the clean air chamber are connected; the filter heating component includes a filter cartridge and a heating element in the filter cartridge, and the heating element is connected to the control board; the filter cartridge is made of high temperature resistant filter material; and a dust collecting inclined plate for guiding the rolling direction of dust is fixed in the processing chamber. The present invention adopts high temperature resistant filter material to make a filter element, and the filter element is sterilized at high temperature by the heating element, so as to achieve continuous and efficient sterilization and drying treatment, so that the attached dust falls off, the filtering efficiency and durability of the filter element are maintained, and the frequent replacement and cleaning of the filter cartridge is avoided.

[0004] The above-mentioned prior art solutions have the following defects: When the filter element is replaced quickly, it is replaced by the snap connection between the filter element and the machine body. In actual use, the filter element is replaced quickly by the snap connection between the filter element and the machine body. No limit structure is set when the filter element is used, which will cause the filter element to shake. Ordinary air purifiers are not effective in cleaning the filter, which affects the effectiveness of the air purifier; The disassembly of the negative ion generator is not convenient enough, therefore, the present invention provides an air purifier with a quick filter replacement to solve the above-mentioned problem. Summary of the invention

[0005] The object of the present invention is to provide an air purifier with a quick filter element replacement, so as to solve the problem proposed in the above background technology that the filter element is quickly replaced by replacing it through the snap-fit ​​connection between the filter element and the machine body. In actual use, the filter element is quickly replaced by the snap-fit ​​connection between the filter element and the machine body. No limiting structure is set during the use of the filter element, which will cause the filter element to shake. Ordinary air purifiers have poor cleaning effect on the filter, which affects the use effect of the air purifier and the problem that the disassembly of the negative ion generator is not convenient enough.

[0006] To achieve the above object, the present invention provides the following technical solution: an air purifier with a filter element that can be quickly replaced, comprising a body, a self-locking roller is fixedly installed on the outer side of the lower end of the body, an air outlet pipe is fixedly installed on the middle side of the left end of the body, and a fan is arranged inside the air outlet pipe; Also includes: A quick replacement structure, which is installed in the middle of the machine body and is used to replace the filter cartridge; A disassembly structure, which is fixedly mounted on the left side of the interior of the machine body and is used for disassembling the air vitamins; A cleaning structure is installed at the right end of the machine body and is used for cleaning the air filter.

[0007] Preferably, the quick-change structure includes a fixed seat, which is fixedly installed on the lower inner side of the body, and a first spring is arranged inside the fixed seat, and a moving block is fixedly installed on the inner side of the first spring, and a clamping block is fixedly installed on the inner side of the moving block, the inner side of the clamping block is movably connected with a fixed cylinder, and a filter element is fixedly installed on the upper side of the fixed cylinder, and a fixed rod is movably connected to the outer side of the upper end of the fixed cylinder, a connecting spring is fixedly arranged in the middle part of the upper end of the body, and a limiting plate is fixedly installed on the inner side of the connecting spring.

[0008] Preferably, the moving blocks are connected to the machine body in a sliding manner, and the moving blocks are distributed at equal angles with respect to the center point of the fixing seat.

[0009] Preferably, the cleaning structure includes a fixed plate, which is fixedly installed on the outer side of the right end of the body, and a limiting block is fixedly installed on the inner rear side of the fixed plate, and a cylinder is fixedly arranged on the inner front side of the fixed plate, and a movable frame is fixedly installed on the lower side of the cylinder, and bristles are fixedly installed on the rear side of the movable frame, a connecting filter is movably connected to the middle side of the right end of the body, and a moving rod is fixedly installed on the outer side of the middle part of the connecting filter, and a connecting plate is fixedly installed on the outer side of the left end of the moving rod, and the inner right side of the connecting plate is movably connected to the moving rod, the left side of the moving rod is movably connected to a connecting block, and the outer side of the connecting block is movably connected to the limiting rod, and a second spring is fixedly arranged on the outer side of the right end of the limiting rod.

[0010] Preferably, the moving rod and the mounting block are connected by threads, and the moving rod and the connecting block are connected by a bearing.

[0011] Preferably, the connection block and the limiting rod are connected in a fitting manner, and the limiting rod is symmetrically distributed up and down about the center line of the connection plate.

[0012] Preferably, the disassembly structure includes a fixed block, which is fixedly installed on the left side of the interior of the body, and a third spring is fixedly arranged on the right side of the interior of the fixed block, and a connecting rod is fixedly installed on the left side of the third spring, and the left side of the connecting rod is movably connected to a connecting block, the middle side of the connecting block is movably connected to a mounting rod, and a negative ion generator is fixedly installed on the right side of the connecting block.

[0013] Preferably, the connecting rod and the fixing block are connected in a sliding manner, and the connecting rod and the connecting block are connected in a snap-fit ​​manner.

[0014] Preferably, the connecting block and the fixing block are connected by snap-fitting, and the vertical cross-section of the connecting block is an "L"-shaped structure.

[0015] Preferably, the limit plate and the filter element are connected by snap-fitting, and the filter element and the fixing rod are connected by threads.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the air purifier with quick filter replacement is convenient for quick replacement of the filter element, convenient for cleaning the filter screen, and convenient for disassembly of the negative ion generator; The fixing rod is threadedly connected to the outer side of the upper end of the filter element by rotating the fixing rod, so that the fixing rod slides upward on the outer side of the filter element, thereby separating the fixing rod from the upper end of the body, and then pulling the limit plate outward to make the limit plate slide outward on the upper end of the body, so that the limit plate drives the connecting spring to be compressed, thereby separating the limit plate from the outer side of the upper end of the filter element, and pulling the filter element upward to make the filter element drive the fixing cylinder to slide upward, thereby separating the fixing cylinder from the inner side of the clamping block, and then the first spring drives the moving block to slide inward, so that the fixing cylinder is separated from the inside of the fixing seat, so that the filter element can be quickly replaced; By starting the cylinder, the cylinder drives the moving frame to slide on the inner side of the fixed plate, so that the moving frame slides on the front side of the limit block, and then the moving frame drives the brush to slide on the right side of the connecting filter, so that the brush cleans the dust on the right side of the connecting filter, which is convenient for cleaning the connecting filter; By rotating the mounting rod, the mounting rod is threadedly connected to the left end of the connecting block, so that the mounting rod slides upward at the left end of the connecting block, and then the mounting rod is separated on the left side inside the fixed block, and then the negative ion generator is pulled upward, so that the negative ion generator drives the connecting block to slide upward inside the fixed block, so that the connecting block pushes the connecting rod to slide to the right, and then the connecting rod drives the third spring to be compressed, so that the connecting rod is separated on the right side of the lower end of the connecting block, so that the connecting block is separated inside the fixed block, and then the negative ion generator is separated on the right side of the fixed block, so that the negative ion generator is convenient for disassembly of the negative ion generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall cross-sectional structure of the connection between the machine body and the self-locking roller of the present invention; Figure 2 For the present invention Figure 1 The enlarged structural diagram at A in the middle; Figure 3 For the present invention Figure 1 The enlarged structural diagram at B in the middle; Figure 4 For the present invention Figure 1 The enlarged structural diagram at C in the middle; Figure 5 The present invention is a schematic diagram of the overall cross-sectional structure of the body and the connection filter connected; Figure 6 It is a schematic diagram of the overall cross-sectional structure of the connection between the fixing seat and the filter element of the present invention; Figure 7 This is a schematic diagram of the overall cross-sectional structure of the connection between the filter element and the body of the present invention; Figure 8 This is a schematic diagram of the explosion structure of the mobile frame and the fixed plate connected to each other in the present invention; Fig. 9 This is a schematic diagram of the explosion structure of the mounting block and the moving rod connected to the present invention; Fig.10 It is a schematic diagram of the explosion structure of the fixed block and the connecting block of the present invention.

[0018] In the figure: 1. body; 2. self-locking roller; 3. air outlet duct; 4. fan; 5. fixed seat; 6. first spring; 7. moving block; 8. clamping block; 9. fixed cylinder; 10. filter element; 11. negative ion generator; 12. connecting filter; 13. fixing plate; 14. limiting block; 15. moving frame; 16. mounting block; 17. moving rod; 18. connecting block; 19. limiting rod; 20. second spring; 21. fixing block; 22. third spring; 23. connecting rod; 24. connecting block; 25. mounting rod; 26. connecting spring; 27. limiting plate; 28. fixing rod; 29. ​​bristles; 30. cylinder; 31. connecting plate. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-10 The present invention provides a technical solution: an air purifier with a quick filter element replacement, comprising: a self-locking roller 2 is fixedly installed on the outer side of the lower end of the body 1, and an air outlet pipe 3 is fixedly installed on the middle side of the left end of the body 1, and a fan 4 is arranged inside the air outlet pipe 3, and the fan 4 is started to draw air on the right side of the body 1 into the inside of the body 1 for purification, and the purified air is discharged through the air outlet pipe 3; A quick-change structure is installed in the middle of the body 1 and is used to replace the filter cartridge. The quick-change structure is rotated to separate the quick-change structure at the upper end of the body 1, so as to facilitate the replacement of the filter cartridge. The disassembly structure is fixedly mounted on the left side of the interior of the machine body 1 and is used to disassemble the air vitamin. The disassembly structure is rotated to connect the disassembly structure on the left side of the interior of the machine body 1, so as to facilitate the disassembly of the air vitamin. The cleaning structure is installed at the right end of the body 1 and is used to clean the air filter. The cleaning structure is started to clean the air filter on the right side of the body 1.

[0021] When using the air purifier with quick filter replacement, the specific Figure 1 , Figure 4 and Figure 5 In the invention, the quick-change structure includes a fixed seat 5, which is fixedly installed on the lower side of the inner part of the body 1, and a first spring 6 is arranged inside the fixed seat 5, and a moving block 7 is fixedly installed on the inner side of the first spring 6, and a clamping block 8 is fixedly installed on the inner side of the moving block 7, and a fixed cylinder 9 is movably connected to the inner side of the clamping block 8, and a filter element 10 is fixedly installed on the upper side of the fixed cylinder 9, and a fixed rod 28 is movably connected to the outer side of the upper end of the fixed cylinder 9, and a connecting spring 26 is fixedly arranged on the middle part of the upper end of the body 1, and a limiting plate 27 is fixedly installed on the inner side of the connecting spring 26, the moving block 7 is connected to the body 1 in a sliding manner, and the moving block 7 is distributed at equal angles with respect to the center point of the fixed seat 5, the limiting plate 27 is connected to the filter element 10 in a snap-fit ​​manner, and the filter element 10 is connected to the fixing rod The fixing rod 28 is connected by a thread, and the fixing rod 28 is rotated so that the fixing rod 28 is threadedly connected to the outer side of the upper end of the filter element 10, so that the fixing rod 28 slides upward on the outer side of the filter element 10, and then the fixing rod 28 is separated from the upper end of the body 1, and then the limiting plate 27 is pulled outward to make the limiting plate 27 slide outward on the upper end of the body 1, so that the limiting plate 27 drives the connecting spring 26 to be compressed, and then the limiting plate 27 is separated from the outer side of the upper end of the filter element 10, and the filter element 10 is pulled upward to make the filter element 10 drive the fixing cylinder 9 to slide upward, so that the fixing cylinder 9 is separated from the inner side of the clamping block 8, and then the first spring 6 drives the moving block 7 to slide inward, so that the fixing cylinder 9 is separated from the inside of the fixing seat 5, which is convenient for quick replacement of the filter element 10; Specific as Figure 3 , Figure 6 , Figure 7 , Figure 8 and Fig. 9In the embodiment, the cleaning structure includes a fixed plate 13, which is fixedly mounted on the right end outer side of the machine body 1, and a limit block 14 is fixedly mounted on the inner rear side of the fixed plate 13, and a cylinder 30 is fixedly arranged on the inner front side of the fixed plate 13, and a movable frame 15 is fixedly mounted on the lower side of the cylinder 30, and a brush 29 is fixedly mounted on the rear side of the movable frame 15, and a filter screen 12 is movably connected to the middle side of the right end of the machine body 1, and a movable rod 17 is fixedly mounted on the middle outer side of the connected filter screen 12, and the left side of the movable rod 17 is fixedly mounted on the left side of the movable rod 17. A connecting plate 31 is fixedly installed on the outer side of the end, and a moving rod 17 is movably connected to the right side of the inner side of the connecting plate 31, and a connecting block 18 is movably connected to the left side of the moving rod 17, and a limiting rod 19 is movably connected to the outer side of the connecting block 18, and a second spring 20 is fixedly arranged on the outer side of the right end of the limiting rod 19, the moving rod 17 is connected to the mounting block 16 in a threaded manner, and the moving rod 17 is connected to the connecting block 18 through a bearing, and the connecting block 18 is connected to the limiting rod 19 in a fitting manner. The limit rod 19 is symmetrically distributed up and down about the center line of the connecting plate 31 to start the cylinder 30, so that the cylinder 30 drives the moving frame 15 to slide on the inner side of the fixed plate 13, so that the moving frame 15 slides on the front side of the limit block 14, and then the moving frame 15 drives the brush 29 to slide on the right side of the connecting filter 12, so that the brush 29 cleans the dust on the right side of the connecting filter 12, which is convenient for cleaning the connecting filter 12, and the moving rod 17 is rotated to make the moving rod 17 threadedly connected to the inside of the mounting block 16 The connecting block 18 connected to the moving rod 17 through the bearing slides to the right inside the connecting plate 31, and then the second spring 20 drives the limiting rod 19 to slide inward inside the connecting plate 31, so that the limiting rod 19 is separated on the right side inside the machine body 1, and then the mounting block 16 is pulled, so that the mounting block 16 drives the connecting filter 12 to separate on the middle side of the right end of the machine body 1, so that the mounting block 16 drives the connecting plate 31 to separate on the right side of the machine body 1, so that the connecting filter 12 is conveniently replaced; Specific as Figure 1 , Figure 2 and Fig.10In the embodiment, the disassembly structure includes a fixed block 21, which is fixedly installed on the left side of the interior of the machine body 1, and a third spring 22 is fixedly arranged on the right side of the interior of the fixed block 21, and a connecting rod 23 is fixedly installed on the left side of the third spring 22, and a connecting block 24 is movably connected to the left side of the connecting rod 23, and a mounting rod 25 is movably connected to the middle side of the connecting block 24, and a negative ion generator 11 is fixedly installed on the right side of the connecting block 24, the connecting rod 23 and the fixed block 21 are connected in a sliding manner, and the connecting rod 23 and the connecting block 24 are connected in a snap-fit ​​manner, the connecting block 24 and the fixed block 21 are connected in a snap-fit ​​manner, and the vertical cross-section of the connecting block 24 is an "L"-shaped structure, and the rotating mounting rod 25 , so that the mounting rod 25 is threadedly connected to the left end of the connecting block 24, so that the mounting rod 25 slides upward at the left end of the connecting block 24, and then the mounting rod 25 is separated on the left side of the interior of the fixed block 21, and then the negative ion generator 11 is pulled upward, so that the negative ion generator 11 drives the connecting block 24 to slide upward inside the fixed block 21, so that the connecting block 24 pushes the connecting rod 23 to slide to the right, and then the connecting rod 23 drives the third spring 22 to be compressed, so that the connecting rod 23 is separated on the right side of the lower end of the connecting block 24, so that the connecting block 24 is separated inside the fixed block 21, and then the negative ion generator 11 is separated on the right side of the fixed block 21, which is convenient for disassembling the negative ion generator 11.

[0022] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0023] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air purifier with a filter element that can be quickly replaced, comprising a body (1), a self-locking roller (2) being fixedly mounted on the outer side of the lower end of the body (1), an air outlet pipe (3) being fixedly mounted on the middle side of the left end of the body (1), and a fan (4) being arranged inside the air outlet pipe (3); It is characterized in that Also includes: A quick replacement structure, which is installed in the middle of the body (1) and is used to replace the filter cartridge; A disassembly structure, the disassembly structure is fixedly mounted on the left side of the interior of the machine body (1) and is used for disassembling the air vitamins; A cleaning structure is installed at the right end of the machine body (1) and is used to clean the air filter.

2. The air purifier with quick filter replacement according to claim 1, characterized in that: The quick-change structure comprises a fixed seat (5), the fixed seat (5) being fixedly mounted on the lower side of the interior of the body (1), a first spring (6) being arranged inside the fixed seat (5), a moving block (7) being fixedly mounted on the inner side of the first spring (6), a clamping block (8) being fixedly mounted on the inner side of the moving block (7), a fixed cylinder (9) being movably connected to the inner side of the clamping block (8), a filter element (10) being fixedly mounted on the upper side of the fixed cylinder (9), a fixed rod (28) being movably connected to the outer side of the upper end of the fixed cylinder (9), a connecting spring (26) being fixedly mounted on the middle part of the upper end of the body (1), and a limiting plate (27) being fixedly mounted on the inner side of the connecting spring (26).

3. The air purifier with quick filter replacement according to claim 2, characterized in that: The moving block (7) is connected to the machine body (1) in a sliding manner, and the moving blocks (7) are distributed at equal angles with respect to the center point of the fixed seat (5).

4. The air purifier with quick filter replacement according to claim 1, characterized in that: The cleaning structure comprises a fixed plate (13), which is fixedly mounted on the right end outer side of the machine body (1), and a limit block (14) is fixedly mounted on the inner rear side of the fixed plate (13), and a cylinder (30) is fixedly arranged on the inner front side of the fixed plate (13), and a movable frame (15) is fixedly mounted on the lower side of the cylinder (30), and bristles (29) are fixedly mounted on the rear side of the movable frame (15), and a connecting filter (12) is movably connected to the middle side of the right end of the machine body (1), and a movable rod (17) is fixedly mounted on the middle outer side of the connecting filter (12), and a connecting plate (31) is fixedly mounted on the left end outer side of the movable rod (17), and the inner right side of the connecting plate (31) is movably connected to the movable rod (17), and the left side of the movable rod (17) is movably connected to the connecting block (18), and the outer side of the connecting block (18) is movably connected to the limit rod (19), and a second spring (20) is fixedly mounted on the right end outer side of the limit rod (19).

5. The air purifier with quick filter replacement according to claim 4, characterized in that: The moving rod (17) and the mounting block (16) are connected in a threaded manner, and the moving rod (17) and the connecting block (18) are connected via a bearing.

6. The air purifier with quick filter replacement according to claim 5, characterized in that: The connection block (18) and the limiting rod (19) are connected in a fitting manner, and the limiting rod (19) is symmetrically distributed up and down about the center line of the connection plate (31).

7. The air purifier with quick filter replacement according to claim 1, characterized in that: The disassembly structure comprises a fixed block (21), the fixed block (21) being fixedly mounted on the left side of the interior of the machine body (1), a third spring (22) being fixedly arranged on the right side of the interior of the fixed block (21), a connecting rod (23) being fixedly mounted on the left side of the third spring (22), a connecting block (24) being movably connected to the left side of the connecting rod (23), a mounting rod (25) being movably connected to the middle side of the connecting block (24), and a negative ion generator (11) being fixedly mounted on the right side of the connecting block (24).

8. The air purifier with quick filter replacement according to claim 7, characterized in that: The connecting rod (23) and the fixed block (21) are connected in a sliding manner, and the connecting rod (23) and the connecting block (24) are connected in a snap-fit ​​manner.

9. The air purifier with quick filter replacement according to claim 8, characterized in that: The connecting block (24) and the fixing block (21) are connected in a snap-fit ​​manner, and the vertical cross-section of the connecting block (24) is an "L"-shaped structure.

10. The air purifier with quick filter replacement according to claim 2, characterized in that: The limiting plate (27) and the filter element (10) are connected in a snap-fit ​​manner, and the filter element (10) and the fixing rod (28) are connected in a threaded manner.

Citation Information

Patent Citations

  • an air purifier

    CN103566696B

  • A large air purifier

    CN109351086B

  • Air purifier set with rapid and efficient purification function

    CN112503685A

  • Industrial environment-friendly equipment for biological pollutants

    CN211245902U

  • Filter capable of quickly replacing filter element

    CN221412390U

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