Multi-layer filter element structure for air purifier

Abstract

The utility model provides a multilayer filter element structure for an air purifier, which relates to the technical field of filter elements and comprises a base, an outer filter screen, a fine filter screen and an activated carbon filter screen, the outer filter screen consists of a first screen plate and a second screen plate, and the bottom ends of the first screen plate and the second screen plate are fixed on the base through bolts. The cleaning device is arranged on the outer surface of the base, the cleaning device comprises the servo motor, the two shaft rods and the brush rod, the outer filter screen is divided into the first screen plate and the second screen plate, and when the filter element is used, the first screen plate and the second screen plate are separated from each other; a servo motor on a base is operated to control two sliding rods to drive a brush rod to move on the surfaces of a first net plate and a second net plate, impurities attached to the surfaces of the first net plate and the second net plate can be cleaned into a groove rod to be collected, and the groove rod can be conveniently disassembled to clean the interior of the groove rod by taking down the first net plate. The whole filter element does not need to be disassembled, so that the times of stopping the air purifier to clean the filter element are greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of filter elements, in particular to a multi-layer filter element structure for an air purifier. Background Art

[0002] The filter element is the main component of the air purifier. The multi-layer filter element mainly includes the pre-filter element, activated carbon filter element, HEPA filter element, etc. Each layer of the filter element has its specific function. After these filter elements have been used for a period of time, the filtering effect will gradually decrease and need to be replaced in time.

[0003] When the multi-layer filter element structure is in use, a large number of large particles of impurities, such as hair, fiber, etc., are usually adhered to the surface of the outermost outer filter. The impurities attached to the outer filter surface will affect the rate at which air enters the air purifier. This causes the air purifier to be frequently disassembled after the filter element is installed inside the air purifier to clean the outer filter surface in the filter element, which causes certain inconveniences when using the filter element. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that a large number of large particles of impurities, such as hair, fiber, etc., usually adhere to the surface of the outermost outer filter. The impurities attached to the surface of the outer filter will affect the rate at which air enters the air purifier. This results in the need to frequently disassemble the air purifier after the filter element is installed inside the air purifier to clean the surface of the outer filter element in the filter element, which causes certain inconveniences when using the filter element. A multi-layer filter element structure for an air purifier is proposed to solve the problem that

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a multi-layer filter element structure for an air purifier, including a base, an outer filter screen composed of a first mesh plate and a second mesh plate, a fine filter screen and an activated carbon filter screen, the first mesh plate and the second mesh plate are connected by an auxiliary device to form an outer filter screen, the bottom ends of the first mesh plate and the second mesh plate are fixed to the base by bolts, and the outer surface of the base is provided with a cleaning device that can clean the surface of the first mesh plate and the second mesh plate.

[0006] The effect achieved by the above components is: when installing the filter element structure, the first mesh plate and the second mesh plate are connected through an auxiliary device, and then the bottom ends of the first mesh plate and the second mesh plate are connected to the base through bolts, and then the fine filter is placed above the base and inside the outer filter, and finally the activated carbon filter is placed inside the fine filter so that the top end is placed on the top of the outer filter.

[0007] Preferably, the cleaning device includes a servo motor, two shafts and a brush rod, the servo motor is arranged on the surface of the base, and the output end of the servo motor is fixedly connected to a half gear; the two shafts rotate respectively on both sides of the inner wall of the base, and the top end of the shaft is fixedly connected to a flat gear, the outer surface of the flat gear is meshed with the outer surface of the half gear, and the shaft can be driven to rotate by the flat gear driven by the half gear, and the bottom end of the shaft is fixedly connected to a sliding rod, and the rotation of the shaft drives the sliding rod to move inside the base, and the outer surface of the shaft is provided with a coil spring, which is used to limit the angle of the shaft, and sliding grooves are opened on both sides of the bottom end of the inner wall of the base, and the sliding rod moves inside the sliding groove, and the end of the sliding rod away from the rotating shaft is fixedly connected to two brush rods, and when the first mesh plate and the second mesh plate are installed on the base, the two brush rods are respectively located on the inner and outer sides of the first mesh plate or the second mesh plate.

[0008] The effects achieved by the above components are as follows: by setting a cleaning device, when the filter element is used, the suction fan arranged inside the air purifier is located at the top of the filter element, and air is drawn into the filter element. The air passes through the outer filter composed of the first mesh plate and the second mesh plate and enters the fine filter. The outer filter is used to filter large particles of impurities such as fluff in the air, and then the fine particles in the air are filtered through the fine filter. The air then passes through the activated carbon filter, and the odor and harmful gases in the air are adsorbed by the activated carbon filter. Finally, the air is moved to the top through the inside of the activated carbon filter and output. When the air purifier is used for a period of time, the servo motor can be operated. The machine drives the half gear to rotate through the servo motor. When the half gear rotates, it will move to one side of the flat gear at the top of the two shafts in turn and mesh with the outer surface of the flat gear, driving the flat gear and the shaft to rotate. The shaft drives the sliding rod to move in one direction on the inner wall of the slide groove, so that the two brush rods on the outer surface of the sliding rod sweep the surface of the first mesh plate or the second mesh plate to clean the impurities attached to the surface of the first mesh plate or the second mesh plate. After the half gear moves away from the outer surface of the flat gear, the coil spring returns to its original state and drives the shaft and the sliding rod to rotate in the original direction, so that the brush rod swings back and forth on the surface of the first mesh plate or the second mesh plate for cleaning.

[0009] Preferably, the cleaning device further comprises a plurality of groove rods, and magnetic stickers which can be attracted to each other are arranged on one side of the groove rods and the outer surface of the brush rods.

[0010] The effect achieved by the above components is: when installing the filter element, a groove rod can be respectively attached to the outer surface of the brush rod through a magnetic patch on the outside of the two brush rods. When the brush rod moves on the surface of the first mesh plate or the second mesh plate for cleaning, the groove rod can collect the large particles of impurities cleaned by the brush rod. The first mesh plate and the second mesh plate can be separated by an auxiliary device, and the groove rod on the surface of the brush rod can be removed for cleaning without removing the filter element as a whole.

[0011] Preferably, a stopper is fixedly connected to the bottom end of the inner wall of the slot rod, and the stopper is located on the outward side of the inner wall of the slot rod.

[0012] The effect achieved by the above components is that the large particles of impurities entering the interior of the slot rod can be blocked by setting the stopper, thereby preventing the impurities from escaping from the interior of the slot rod as much as possible.

[0013] Preferably, the auxiliary device includes a plurality of L-shaped blocks and U-shaped blocks, the L-shaped blocks are fixed at the four corners of one side of the first mesh plate, the U-shaped blocks are fixed at the four corners of the outer surface of the second mesh plate, the inner wall of the U-shaped block is slidably connected with a round rod, the outer surface of the round rod is provided with a spring, the spring is used to limit the position of the round rod outside the U-shaped block, the outer surface of the second mesh plate is provided with a plurality of through grooves, the through grooves are located on the outer surface of the second mesh plate near the U-shaped block.

[0014] The effect achieved by the above components is: when connecting the first mesh plate and the second mesh plate, align the two end positions of the first mesh plate and the second mesh plate and move the first mesh plate toward the second mesh plate. When the first mesh plate approaches the second mesh plate, the L-shaped blocks on the outer surface will enter the through groove on the outer surface of the second mesh plate and contact one end of the round rod. Continuing to push the first mesh plate will cause the round rod to slide on the inner wall of the U-shaped block and compress the spring. Then the L-shaped block passes through the through groove, and the two ends of the first mesh plate are fitted together. The spring pushes the round rod back to its original position on the side of the L-shaped block away from one end of the first mesh plate, thereby limiting the position of the L-shaped block inside the through groove and connecting the first mesh plate and the second mesh plate.

[0015] Preferably, the edge of one side of the top end of the L-shaped block is a bevel, and the edge of one side of the top end of the round rod close to the through groove is a bevel.

[0016] The effect achieved by the above components is: by setting the top side of the L-shaped block and the edge of the top of the round rod close to the through slot as inclined surfaces, it is easier to push the round rod to move to the other side of the round rod when the L-shaped block passes through the through slot and contacts the outer surface of the round rod.

[0017] Preferably, a protrusion is fixedly connected to the bottom end of the round rod, and the protrusion protrudes from one side of the U-shaped block.

[0018] The effect achieved by the above components is: when the first mesh plate and the second mesh plate need to be removed, the protrusions at the bottom ends of the round rods are pulled to control the round rods to move away from the L-shaped blocks, and then the first mesh plate is pulled away from the second mesh plate to make the L-shaped blocks disengage from the through grooves.

[0019] Compared with the prior art, the advantages and positive effects of the utility model are:

[0020] In the utility model, a cleaning device is provided, and the outer filter screen is divided into a first mesh plate and a second mesh plate. When the filter element is in use, the servo motor on the operating base controls the two sliding rods to drive the brush rod to move on the surfaces of the first mesh plate and the second mesh plate. Impurities attached to the surfaces of the first mesh plate and the second mesh plate can be cleaned and collected inside the groove rod. The first mesh plate can be removed to conveniently remove the groove rod for cleaning the inside of the groove rod, and there is no need to remove the filter element as a whole, which greatly reduces the number of times the air purifier needs to be shut down to clean the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0022] Figure 2 It is an exploded schematic diagram of the three-dimensional structure of the utility model;

[0023] Figure 3 It is a schematic diagram of a partial cross-section of the three-dimensional structure of the base of the utility model;

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the first mesh plate of the utility model;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the second mesh plate of the utility model;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the sliding rod of the utility model;

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the slot rod of the utility model.

[0028] Legend: 1. Base; 2. Cleaning device; 3. Auxiliary device; 4. First mesh plate; 5. Second mesh plate; 6. Fine filter; 7. Activated carbon filter; 21. Servo motor; 22. Half gear; 23. Slide groove; 24. Shaft rod; 25. Flat gear; 26. Coil spring; 27. Sliding rod; 28. Brush rod; 29. ​​Slot rod; 210. Stop block; 31. L-shaped block; 32. Through groove; 33. U-shaped block; 34. Round rod; 35. Spring; 36. Bump. DETAILED DESCRIPTION

[0029] Embodiment 1, as Figure 1-2As shown, a multi-layer filter element structure for an air purifier includes a base 1, an outer filter screen composed of a first mesh plate 4 and a second mesh plate 5, a fine filter screen 6 and an activated carbon filter screen 7. The first mesh plate 4 and the second mesh plate 5 are connected by an auxiliary device 3 to form an outer filter screen. The bottom ends of the first mesh plate 4 and the second mesh plate 5 are fixed to the base 1 by bolts. The outer surface of the base 1 is provided with a cleaning device 2 for cleaning the surface of the first mesh plate 4 and the second mesh plate 5. When installing the filter element structure, the first mesh plate 4 and the second mesh plate 5 are connected by the auxiliary device 3, and then the bottom ends of the first mesh plate 4 and the second mesh plate 5 are connected to the base 1 by bolts, and then the fine filter screen 6 is placed above the base 1 and located inside the outer filter screen. Finally, the activated carbon filter screen 7 is placed inside the fine filter screen 6 so that the top end is placed on the top end of the outer filter screen.

[0030] Reference Figure 1 , Figure 2 , Figure 3 and Figure 6As shown, in this embodiment: the cleaning device 2 includes a servo motor 21, two shafts 24 and a brush rod 28, the servo motor 21 is arranged on the surface of the base 1, and the output end of the servo motor 21 is fixedly connected to a half gear 22; the two shafts 24 rotate on both sides of the inner wall of the base 1 respectively, and the top of the shaft 24 is fixedly connected to a flat gear 25, and the outer surface of the flat gear 25 is meshed with the outer surface of the half gear 22. The flat gear 25 is driven to rotate by the half gear 22, and the shaft 24 can be driven to rotate. The bottom end of the shaft 24 is fixedly connected to a sliding rod 27, and the rotation of the shaft 24 drives the sliding rod 27 in the base 1 The outer surface of the shaft 24 is provided with a coil spring 26, and the coil spring 26 is used to limit the angle of the shaft 24. Slide grooves 23 are provided on both sides of the bottom end of the inner wall of the base 1. The sliding rod 27 moves inside the slide groove 23. The end of the sliding rod 27 away from the rotating shaft is fixedly connected with two brush rods 28. When the first mesh plate 4 and the second mesh plate 5 are installed on the base 1, the two brush rods 28 are respectively located on the inner and outer sides of the first mesh plate 4 or the second mesh plate 5. By setting the cleaning device 2, when the filter element is used, the suction fan arranged inside the air purifier is located at the top of the filter element to draw air into the filter element. The air passes through the first mesh plate 4 and the second mesh plate 5. The outer filter composed of the plate 4 and the second mesh plate 5 enters the fine filter 6, and the large particles of impurities such as fluff in the air are filtered through the outer filter, and then the fine particles in the air are filtered through the fine filter 6, and then the air passes through the activated carbon filter 7, and the odor and harmful gases in the air are adsorbed by the activated carbon filter 7, and finally the air moves to the top through the inside of the activated carbon filter 7. When the air purifier is used for a period of time, the servo motor 21 can be operated, and the half gear 22 is driven to rotate by the servo motor 21. When the half gear 22 rotates, it will move to the side of the flat gear 25 at the top of the two shafts 24 in sequence. It meshes with the outer surface of the flat gear 25, driving the flat gear 25 and the shaft 24 to rotate, and the sliding rod 27 is driven by the shaft 24 to move in one direction on the inner wall of the slide groove 23, so that the two brush rods 28 on the outer surface of the sliding rod 27 clean the surface of the first mesh plate 4 or the second mesh plate 5 and sweep away the impurities attached to the surface of the first mesh plate 4 or the second mesh plate 5. After the half gear 22 moves away from the outer surface of the flat gear 25, the coil spring 26 returns to its original state and drives the shaft 24 and the sliding rod 27 to rotate in the original direction, so that the brush rod 28 swings back and forth on the surface of the first mesh plate 4 or the second mesh plate 5 for cleaning.

[0031] Reference Figure 2 , Figure 3 and Figure 6 as well as Figure 7As shown, in this embodiment: the cleaning device 2 also includes a plurality of groove rods 29, and magnetic patches that can be attracted to each other are provided on one side of the groove rod 29 and the outer surface of the brush rod 28. When the filter element is installed, one groove rod 29 can be respectively attracted to the outer surface of the brush rod 28 through the magnetic patches on the outer side of the two brush rods 28. When the brush rod 28 moves on the surface of the first mesh plate 4 or the second mesh plate 5 for cleaning, the large particles of impurities cleaned by the brush rod 28 can be collected through the groove rod 29. The first mesh plate 4 and the second mesh plate 5 can be separated by the auxiliary device 3, and the groove rod 29 on the surface of the brush rod 28 can be removed for cleaning, without the need to remove the filter element as a whole. The bottom end of the inner wall of the groove rod 29 is fixedly connected with a stopper 210, and the stopper 210 is located at the groove rod On the outward side of the inner wall 29, a stopper 210 is provided to block large particles of impurities entering the interior of the slot rod 29, thereby preventing impurities from escaping from the interior of the slot rod 29 as much as possible. By providing a cleaning device 2, the outer filter screen is divided into a first mesh plate 4 and a second mesh plate 5. When the filter element is in use, the servo motor 21 on the operating base 1 controls the two sliding rods 27 to drive the brush rod 28 to move on the surfaces of the first mesh plate 4 and the second mesh plate 5. Impurities attached to the surfaces of the first mesh plate 4 and the second mesh plate 5 can be cleaned and collected inside the slot rod 29. The first mesh plate 4 can be removed to facilitate the removal of the slot rod 29 for cleaning the interior of the slot rod 29. There is no need to remove the filter element as a whole, which greatly reduces the number of times the air purifier needs to be shut down to clean the filter element.

[0032] Reference Figure 1-5 As shown, in this embodiment: the auxiliary device 3 includes a plurality of L-shaped blocks 31 and U-shaped blocks 33, the L-shaped blocks 31 are fixed at the four corners of one side of the first mesh plate 4, the U-shaped blocks 33 are fixed at the four corners of the outer surface of the second mesh plate 5, the inner wall of the U-shaped block 33 is slidably connected with a round rod 34, the outer surface of the round rod 34 is provided with a spring 35, the spring 35 is used to limit the position of the round rod 34 outside the U-shaped block 33, the outer surface of the second mesh plate 5 is provided with a plurality of through grooves 32, the through grooves 32 are located on the outer surface of the second mesh plate 5 near the U-shaped blocks 33, when the first mesh plate 4 and the second mesh plate 5 are connected, the two ends of the first mesh plate 4 and the second mesh plate 5 are aligned and moved The first mesh plate 4 is moved toward the second mesh plate 5. When the first mesh plate 4 approaches the second mesh plate 5, the L-shaped blocks 31 on the outer surface will enter the through groove 32 on the outer surface of the second mesh plate 5 and contact one end of the round rod 34. Continuing to push the first mesh plate 4 will make the round rod 34 slide on the inner wall of the U-shaped block 33 and compress the spring 35. Then the L-shaped block 31 passes through the through groove 32, and the two ends of the first mesh plate 4 and the second mesh plate 5 fit together. The spring 35 pushes the round rod 34 back to its original position, which is located on the side of the L-shaped block 31 away from one end of the first mesh plate 4, thereby limiting the position of the L-shaped block 31 inside the through groove 32 and connecting the first mesh plate 4 and the second mesh plate 5.

[0033] Reference Figure 4 and Figure 5As shown, in the present embodiment: the edge of one side of the top end of the L-shaped block 31 is a bevel, and the edge of one side of the top end of the round rod 34 close to the through groove 32 is a bevel. By setting the top side of the L-shaped block 31 and the edge of one side of the top end of the round rod 34 close to the through groove 32 as bevels, it is easier to push the round rod 34 to move into the other side of the round rod 34 when the L-shaped block 31 passes through the through groove 32 and contacts the outer surface of the round rod 34. The bottom end of the round rod 34 is fixedly connected with a protrusion 36, and the protrusion 36 protrudes from one side of the U-shaped block 33. When the first mesh plate 4 and the second mesh plate 5 need to be removed, the protrusion 36 is pulled at the bottom end of each round rod 34 to control the round rod 34 to move away from the L-shaped block 31, and then the first mesh plate 4 is pulled to move away from the second mesh plate 5 to make the L-shaped block 31 disengage from the through groove 32.

[0034] Working principle:

[0035] S1. When installing the filter element structure, first align the two ends of the first mesh plate 4 and the second mesh plate 5 and move the first mesh plate 4 toward the second mesh plate 5. When the first mesh plate 4 is close to the second mesh plate 5, the L-shaped blocks 31 on the outer surface will enter the through groove 32 on the outer surface of the second mesh plate 5 and contact one end of the round rod 34. Continuing to push the first mesh plate 4 will make the round rod 34 slide on the inner wall of the U-shaped block 33 and compress the spring 35. Then the L-shaped block 31 passes through the through groove 32, and the two ends of the first mesh plate 4 and the second mesh plate 5 fit together. The spring 35 pushes the round rod 34 returns to its original position, located on the side of the L-shaped block 31 away from one end of the first mesh plate 4, limits the position of the L-shaped block 31 inside the through groove 32, connects the first mesh plate 4 and the second mesh plate 5, then connects the bottom ends of the first mesh plate 4 and the second mesh plate 5 to the base 1 through bolts, and adsorbs a slot rod 29 on the outer side of the two brush rods 28 through magnetic stickers on the outer surface of the brush rod 28, then puts the fine filter 6 above the base 1 and inside the outer filter, and finally places the activated carbon filter 7 inside the fine filter 6 so that the top end is placed on the top of the outer filter;

[0036] S2. When using the filter element, the suction fan arranged inside the air purifier is located at the top of the filter element, and draws air into the filter element. The air passes through the outer filter composed of the first mesh plate 4 and the second mesh plate 5 and enters the fine filter 6. The large particles such as fluff in the air are filtered through the outer filter, and then the fine particles in the air are filtered through the fine filter 6. The air then passes through the activated carbon filter 7, and the odor and harmful gases in the air are adsorbed through the activated carbon filter 7. Finally, the air moves to the top through the inside of the activated carbon filter 7 for output. When the air purifier is used for a period of time, the servo motor 21 can be operated, and the servo motor 21 drives the half gear 22 to rotate. When the half gear 22 rotates, it will move to one side of the flat gear 25 at the top of the two shafts 24 in turn and mesh with the outer surface of the flat gear 25, driving the flat gear 25 and the shaft 24 to rotate, and the shaft 24 drives the sliding rod 27 to the inner wall of the slide groove 23. Move in one direction so that the two brush rods 28 on the outer surface of the sliding rod 27 sweep the surface of the first mesh plate 4 or the second mesh plate 5 to clean the impurities attached to the surface of the first mesh plate 4 or the second mesh plate 5. After the half gear 22 is away from the outer surface of the flat gear 25, the coil spring 26 returns to its original state and drives the shaft rod 24 and the sliding rod 27 to rotate in the original direction, so that the brush rod 28 swings back and forth on the surface of the first mesh plate 4 or the second mesh plate 5 for cleaning, and the large particles of impurities cleaned by the brush rod 28 are collected by the groove rod 29, and the protrusion 36 at the bottom end of each round rod 34 is pulled to control the round rod 34 to move away from the L-shaped block 31, and then the first mesh plate 4 is pulled away from the second mesh plate 5 to make the L-shaped block 31 disengage from the through groove 32, so that the first mesh plate 4 can be removed from one side of the second mesh plate 5, and then the groove rods 29 on both sides of the brush rod 28 are removed to clean the inside of the groove rod 29.

[0037] The above is only a preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model. In the description of the utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood by specific circumstances.

Claims

1. A multi-layer filter element structure for an air purifier, comprising a base (1), an outer filter screen composed of a first mesh plate (4) and a second mesh plate (5), a fine filter screen (6) and an activated carbon filter screen (7), characterized in that: The first mesh plate (4) and the second mesh plate (5) are connected via an auxiliary device (3) to form an external filter screen; the bottom ends of the first mesh plate (4) and the second mesh plate (5) are fixed to a base (1) via bolts; and a cleaning device (2) is provided on the outer surface of the base (1) for cleaning the surface of the first mesh plate (4) and the second mesh plate (5).

2. The multi-layer filter element structure for an air purifier according to claim 1, characterized in that: The cleaning device (2) comprises a servo motor (21), two shafts (24) and a brush rod (28); the servo motor (21) is arranged on the surface of the base (1); the output end of the servo motor (21) is fixedly connected to a half gear (22); the two shafts (24) rotate on both sides of the inner wall of the base (1); the top of the shaft (24) is fixedly connected to a flat gear (25); the outer surface of the flat gear (25) is meshed with the outer surface of the half gear (22); the flat gear (25) is driven to rotate by the half gear (22), and the shaft (24) can be driven to rotate; the bottom end of the shaft (24) is fixedly connected to a sliding rod (25); 7), the shaft (24) rotates to drive the sliding rod (27) to move inside the base (1), the outer surface of the shaft (24) is provided with a coil spring (26), the coil spring (26) is used to limit the angle of the shaft (24), the bottom end of the inner wall of the base (1) is provided with sliding grooves (23) on both sides, the sliding rod (27) moves inside the sliding grooves (23), and the end of the sliding rod (27) away from the rotating shaft is fixedly connected to two brush rods (28), when the first mesh plate (4) and the second mesh plate (5) are installed on the base (1), the two brush rods (28) are respectively located on the inner and outer sides of the first mesh plate (4) or the second mesh plate (5).

3. The multi-layer filter element structure for an air purifier according to claim 2, characterized in that: The cleaning device (2) further comprises a plurality of groove rods (29), and magnetic stickers capable of being attracted to each other are provided on one side of the groove rods (29) and on the outer surface of the brush rods (28).

4. The multi-layer filter element structure for an air purifier according to claim 3, characterized in that: A stopper (210) is fixedly connected to the bottom end of the inner wall of the slot rod (29), and the stopper (210) is located on the outward side of the inner wall of the slot rod (29).

5. The multi-layer filter element structure for an air purifier according to claim 4, characterized in that: The auxiliary device (3) comprises a plurality of L-shaped blocks (31) and U-shaped blocks (33); the L-shaped blocks (31) are fixed at four corners of one side of the first mesh plate (4); the U-shaped blocks (33) are fixed at four corners of the outer surface of the second mesh plate (5); a round rod (34) is slidably connected to the inner wall of the U-shaped block (33); a spring (35) is provided on the outer surface of the round rod (34); the spring (35) is used to limit the position of the round rod (34) outside the U-shaped block (33); and a plurality of through grooves (32) are provided on the outer surface of the second mesh plate (5); the through grooves (32) are located on the outer surface of the second mesh plate (5) near the U-shaped blocks (33).

6. The multi-layer filter element structure for an air purifier according to claim 5, characterized in that: The top edge of the L-shaped block (31) is a bevel, and the top edge of the round rod (34) close to the through groove (32) is a bevel.

7. The multi-layer filter element structure for an air purifier according to claim 6, characterized in that: A protrusion (36) is fixedly connected to the bottom end of the round rod (34), and the protrusion (36) protrudes from one side of the U-shaped block (33).

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