Self-cleaning air filter

Abstract

Air inlet holes are formed in the surface of the air filter, the self-cleaning air filter comprises a cleaning device, the cleaning device comprises a cleaning frame arranged outside the air filter in a sleeving mode, the cleaning frame is detachably provided with a cleaning brush, and bristles of the cleaning brush abut against the outer wall of the air filter. The cleaning device comprises a driving assembly in transmission connection with the cleaning frame, and the driving assembly drives the cleaning frame to drive the cleaning brush to rotate in the circumferential direction of the air filter so as to brush off sundries at the air inlet holes. In the rotating process of the cleaning frame, the cleaning brush is driven to rotate around the outer wall of the air filter in the circumferential direction, sundries attached to the air inlet holes in the outer wall are cleaned, the situation that the sundries block the air inlet holes is avoided, the cleaning brush conducts cleaning work in the working process of the air filter, the air inlet holes are kept not blocked in the working process of the air filter, and the service life of the air filter is prolonged. The air filter can work stably and reliably, manual cleaning is not needed, the work efficiency can be improved, and potential safety hazards existing in manual operation are avoided.

Description

Technical Field

[0001] The present application belongs to the technical field of air filters, and in particular relates to a self-cleaning air filter. Background Art

[0002] When harvesting, the high temperature and dry environment coupled with the vehicle's rapid forward motion can stir up debris such as lint, weeds, and broken straw. If dust, sand, and other impurities in the air enter the engine cylinders and burn, they will accelerate engine wear, reducing its service life or even causing serious damage. Therefore, during harvesting, an air filter is required to absorb and filter debris from the environment, trapping it on the filter surface to prevent it from entering the engine cylinders. However, this absorbed debris can quickly clog the air filter's air inlet holes and become difficult to clean.

[0003] In order to solve the problem of blockage of the air inlet holes on the surface of the air filter, the existing method is to manually clean the debris attached to the surface of the air filter after the surface of the air filter is blocked. When the working environment is harsh, the air filter needs to be manually cleaned every ten to twenty minutes, and the operation is frequent. In addition, the air filters of some vehicles are not easily accessible, and it is necessary to step over high-temperature parts such as the exhaust system or climb the entire vehicle with a ladder. The cleaning process is relatively dangerous and seriously affects work efficiency. Utility Model Content

[0004] The present application provides a self-cleaning air filter, which solves the problem that debris attached to the surface of the air filter causes blockage of the air inlet holes, affects the use effect, and is inconvenient to remove the debris on the surface of the air filter.

[0005] The technical solutions adopted in this application are:

[0006] A self-cleaning air filter, wherein an air inlet hole is provided on the surface of the air filter, and comprises a cleaning device, wherein the cleaning device comprises a cleaning frame which is sleeved on the outside of the air filter, and the cleaning frame is detachably provided with a cleaning brush, and the bristles of the cleaning brush abut against the outer wall of the air filter, and the cleaning device comprises a driving assembly which is transmission-connected to the cleaning frame, and the driving assembly drives the cleaning frame to drive the cleaning brush to rotate along the circumference of the air filter to brush off debris at the air inlet hole.

[0007] In a preferred embodiment of a self-cleaning air filter, the outer wall of the air filter is provided with a debris removal portion. The debris removal portion comprises a stripper for scraping a cleaning brush and a shedding area located to one side of the stripper, without an air inlet. After being scraped by the stripper, the cleaning brush moves to the shedding area, where debris is removed from the cleaning brush. In a preferred embodiment of a self-cleaning air filter, the stripper comprises a vertically arranged stripping plate, the vertical projection of the stripping plate at least partially overlapping that of the cleaning brush.

[0008] In a preferred implementation of the self-cleaning air filter, at least two peeling plates are provided, and at least two peeling plates are axially staggered.

[0009] In a preferred implementation of the self-cleaning air filter, the cleaning frame is provided with a limiting groove, the cleaning brush is provided with a limiting block adapted to the limiting groove, and the limiting block is connected to the limiting groove so that the cleaning brush is engaged with the cleaning frame.

[0010] In a preferred implementation of a self-cleaning air filter, the drive assembly includes a drive motor, a drive gear connected to the drive motor, a driven gear plate connected to the drive gear, the driven gear plate is fixed to the cleaning frame, and the bottom of the drive motor is fixed to the top of the air filter.

[0011] In a preferred implementation of the self-cleaning air filter, the cleaning device includes a positioning guide wheel of a position-limiting cleaning frame, the cleaning frame is provided with a mounting opening for mounting the positioning guide wheel, and the positioning guide wheel abuts against an outer wall of the air filter.

[0012] In a preferred implementation of the self-cleaning air filter, a plurality of cleaning brushes are provided along the circumference of the cleaning frame, and positioning guide wheels are provided above and below each cleaning brush.

[0013] In a preferred implementation of the self-cleaning air filter, the air filter is provided with an air avoidance channel, and a power supply line connected to the drive motor is provided in the air avoidance channel for driving the motor to operate.

[0014] In a preferred implementation of a self-cleaning air filter, a first opening is provided at the top of the air filter for the power supply line to pass through, and a second opening is provided at the bottom of the air filter for the power supply line to pass through. The first opening and the second opening are connected to form an air avoidance channel.

[0015] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0016] (1) In the prior art, a plurality of air inlet holes are arranged on the outer wall of the air filter, and a cleaning rack is set on the outer wall of the air filter. During the rotation of the cleaning rack, the cleaning brush connected thereto is driven to rotate circumferentially around the outer wall of the air filter, thereby cleaning the debris attached to the air inlet holes on the outer wall and causing the debris to fall from the outer wall of the air filter, thereby preventing the debris from clogging the air inlet holes on the surface of the air filter. The cleaning rack and the cleaning brush simultaneously clean the surface of the air filter during the operation of the air filter, which is beneficial for keeping the air inlet holes of the air filter from being blocked during the operation, thereby ensuring the stable and reliable operation of the air filter, and eliminating the need for manual cleaning of the air filter, thereby improving the working efficiency of the air filter and the cleaning efficiency of the air filter, and avoiding the safety hazards of manual operation.

[0017] In addition, the cleaning brush is detachably connected to the cleaning rack. On the one hand, long-term use of the cleaning brush may cause the bristles to wear, and the detachable connection makes it easy to replace the cleaning brush. On the other hand, long-term use of the cleaning brush will inevitably cause dirt on the surface of the cleaning brush due to the particularity of the working environment. The detachable connection makes it easy to disassemble and clean the cleaning brush.

[0018] In addition, the cleaning frame can be removed from the outside of the air filter, making it easy to clean or replace the cleaning frame, and to assemble the cleaning frame and cleaning brush. It also makes it easy to inspect and repair the air filter.

[0019] (2) When the self-cleaning device rotates, the debris attached to the surface of the air filter is gradually removed by the cleaning brush when it is swept by the cleaning brush. The remaining debris attached to the cleaning brush is forced to fall off by the stripper when the cleaning brush rotates to the debris peeling part. This process has a pulling and peeling effect on the debris attached to the cleaning brush. In addition, when the cleaning brush passes through the stripper, the cleaning brush will be blocked and rebound, making it easier for the debris to fall off. At the same time, the design of the shedding area eliminates the air inlet holes on the surface of the air filter. The surface of the shedding area is smooth and there is no air suction, which greatly ensures that the peeled debris will not be adsorbed again, thereby improving the shedding effect.

[0020] (3) Two stripping plates are arranged in an axially staggered manner. Preferably, the arrangement of the stripping plates is related to the rotation direction of the self-cleaning device. Along the rotation direction of the cleaning brush, the cleaning brush passes through the two stripping plates arranged from top to bottom, and the debris on the surface of the cleaning brush is removed by the blocking of the stripping plates. The stripper can be set as a flexible stripping plate to allow the cleaning brush to pass through the stripper smoothly and complete the rebound action, ensuring that the rotation process of the cleaning brush is continuous and stable.

[0021] (4) The relative position between the cleaning frame and the air filter is limited by the positioning guide wheel. The detachable cleaning brush is fixed on the cleaning frame. The relative position of the cleaning brush and the air filter surface is accurately controlled by the positioning guide wheel to ensure the normal operation of the cleaning work and the debris removal device. The driven gear plate is connected to the cleaning frame and the drive motor, driving the cleaning frame to rotate with the drive motor. In addition to having the gear transmission function, the driven gear plate indirectly fixes the cleaning frame because the drive motor is connected to the air filter. The driven gear plate is separated between the cleaning frame and the drive motor to avoid the drive motor directly connecting to the cleaning frame and causing collision with the cleaning frame during rotation, thereby protecting the drive motor.

[0022] (5) An air-avoidance channel is set up inside the air filter for laying the power supply line. On the one hand, it can protect the power supply line and avoid the line being exposed and damaged. On the other hand, the power supply line can be laid as short as possible to facilitate operation and connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 This is a schematic structural diagram of a self-cleaning cavity filter in one embodiment of the present utility model;

[0025] Figure 2 This is a schematic structural diagram of a cleaning rack in one embodiment of the present utility model;

[0026] Figure 3 This is an exploded view of a driving device in one embodiment of the present utility model;

[0027] Figure 4 This is an exploded view of a cleaning device in one embodiment of the present invention;

[0028] Figure 5 This is a structural diagram of a driven gear plate in one embodiment of the present utility model;

[0029] Figure 6 This is a schematic diagram of the bottom connection of the driven gear plate in one embodiment of the present utility model;

[0030] Figure 7 This is a schematic structural diagram of an air filter in one embodiment of the present utility model;

[0031] Figure 8 for Figure 7 AA section view;

[0032] Figure 9 for Figure 7 BB cross-sectional view;

[0033] Figure 10 for Figure 9 A magnified view of part I.

[0034] Description of reference numerals:

[0035] 1-air filter, 101-air inlet, 2-cleaning frame, 3-cleaning brush, 4-drive motor, 5-drive gear, 6-driven gear plate, 7-bolt, 8-sleeve, 9-stripper, 91-stripping plate, 10-shedding area, 11-positioning guide wheel, 12-installation port, 13-assembly port, 14-power supply line, 15-first opening, 16-second opening, 17-air avoidance channel, 18-guide wheel shaft, 19-positioning nut, 20-gasket. DETAILED DESCRIPTION

[0036] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0037] The following description sets forth many specific details to facilitate a thorough understanding of the present application. However, the present application may also be implemented in other ways than those described herein, and therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features of each embodiment may be combined with each other unless there is a conflict.

[0038] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present application.

[0039] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0041] The present application provides a self-cleaning air filter. Figures 1 to 10 As shown, an air inlet hole 101 is provided on the surface of the air filter 1, and includes a cleaning device. The cleaning device includes a cleaning frame 2 which is mounted on the outside of the air filter 1. The cleaning frame 2 is detachably provided with a cleaning brush 3. The bristles of the cleaning brush 3 abut against the outer wall of the air filter 1. The cleaning device includes a driving assembly which is transmission-connected to the cleaning frame 2. The driving assembly drives the cleaning frame 2 to drive the cleaning brush 3 to rotate circumferentially along the air filter 1 to brush off debris at the air inlet hole 101.

[0042] In the prior art, a plurality of air inlet holes 101 are arranged on the outer wall of the air filter 1, and a cleaning rack 2 is set on the outer wall of the air filter 1. During the rotation of the cleaning rack 2, the cleaning brush 3 connected thereto is driven to rotate circumferentially around the outer wall of the air filter 1, and the debris attached to the air inlet holes 101 on the outer wall is cleaned, so that the debris falls from the outer wall of the air filter 1, and the air inlet holes 101 on the surface of the air filter 1 are prevented from being blocked by the debris. The cleaning rack 2 and the cleaning brush 3 simultaneously clean the surface of the air filter 1 during the operation of the air filter 1, which is beneficial to keep the air inlet holes 101 of the air filter 1 from being blocked during the operation, thereby ensuring the stable and reliable operation of the air filter 1, and there is no need to manually clean the air filter 1, which is beneficial to improving the working efficiency and cleaning efficiency of the air filter 1, and avoiding the safety hazards of manual operation.

[0043] In addition, the cleaning brush 3 is provided with a detachable connection to the cleaning frame 2. On the one hand, long-term use of the cleaning brush 3 may cause the bristles to wear, and the detachable connection makes it easy to replace the cleaning brush 3. On the other hand, long-term use of the cleaning brush 3 will inevitably cause dirt on the surface of the cleaning brush 3 due to the particularity of the working environment, and the detachable connection makes it easy to disassemble and clean the cleaning brush 3.

[0044] The cleaning rack 2 can also be removed from the outside of the air filter 1, making it easier to clean or replace the cleaning rack 2 and to assemble the cleaning rack 2 with the cleaning brush 3. This also facilitates inspection and repair of the air filter 1. Furthermore, the detachable cleaning rack 2 and cleaning brush 3 of the present application solution reduce replacement costs. Furthermore, cleaning the air filter 1 helps ensure the stable use of the air filter 1 and reduces the replacement cost of the air filter 1. Furthermore, manual cleaning is not required, eliminating the need to consider the space and convenience required for manual cleaning, and the air filter 1 can be arranged according to the actual installation space.

[0045] In one embodiment, Figure 1 、 Figure 4 、 Figure 7 As shown, the outer wall of the air filter 1 is provided with a debris peeling portion, which includes a stripper 9 for scraping the cleaning brush 3 and a peeling area 10 located on one side of the stripper 9 without an air inlet hole 101. After being scraped by the stripper 9, the cleaning brush 3 moves to the peeling area 10 so that the debris falls off from the cleaning brush 3 in the peeling area 10.

[0046] As the self-cleaning device rotates, debris attached to the surface of the air filter 1 is gradually removed as it is swept by the cleaning brush 3. The remaining debris adhering to the cleaning brush 3 is forcibly removed by the stripper 9 when the cleaning brush 3 rotates to the debris peeling section. This process has a pulling and peeling effect on the debris attached to the cleaning brush 3. Furthermore, when the cleaning brush 3 passes through the stripper 9, it is blocked and rebounds, making it easier for the debris to fall off. The design of the shedding area 10 also eliminates the air inlet 101 on the surface of the air filter 1. The smooth surface of the shedding area 10 eliminates air suction, greatly ensuring that the peeled debris is not adsorbed again, thereby improving the shedding effect.

[0047] Furthermore, the stripper 9 includes a stripping plate 91 arranged vertically, and the stripping plate 91 at least partially overlaps with the vertical projection of the cleaning brush 3. This ensures that the stripping plate 91 can contact the cleaning brush 3 during the rotation process of the cleaning brush 3 to strip away debris from the cleaning brush 3.

[0048] Preferably, at least two stripping plates 91 are provided, and at least two stripping plates 91 are axially staggered.

[0049] Two stripping plates 91 are axially offset. Preferably, the stripping plates 91 are positioned relative to the rotation direction of the self-cleaning device. Along the rotation direction of the cleaning brush 3, the cleaning brush 3 passes through the two stripping plates 91 arranged from top to bottom, and debris on the surface of the cleaning brush 3 is removed by the stripping plates 91. The stripper 9 can be configured as a flexible stripping plate 91 to allow the cleaning brush 3 to pass through the stripper 9 smoothly and complete the rebound action, ensuring that the rotation process of the cleaning brush 3 is continuous and stable.

[0050] In one embodiment, the cleaning rack 2 is provided with a retaining groove, and the cleaning brush 3 is provided with a retaining block adapted to fit within the retaining groove. The retaining block is connected to the retaining groove to secure the cleaning brush 3 to the cleaning rack 2. The retaining groove and retaining block engagement are simple and stable. The retaining groove and retaining block are not shown in the figures; this connection is not a commonly used method for detachable connection and can be configured by a technician based on actual installation conditions.

[0051] It is also understandable that the cleaning brush 3 and the cleaning frame 2 may be assembled using other detachable connection methods in the prior art.

[0052] In one embodiment, Figures 3 to 6 As shown, the drive assembly includes a drive motor 4, a drive gear 5 connected to the drive motor 4, a driven gear plate 6 connected to the drive gear 5, the driven gear plate 6 is fixed to the cleaning frame 2, and the bottom of the drive motor 4 is fixed to the top of the air filter 1.

[0053] like Figure 4As shown, the cleaning frame 2 is constrained by the bolts 7 and the shaft sleeve 8 to achieve a limited connection with the driving device, so that the cleaning frame 2 is coaxial with the driving motor 4 and can only make circumferential rotational motion along the air filter 1. A gasket 20 is provided between the bolts 7 and the shaft sleeve 8. The driven gear plate 6 is connected to the top of the cleaning frame 2 through a positioning nut 19. The driving gear 5 and the driving motor 4 are located below the driven gear plate 6. The top of the air filter 1 is provided with an assembly port 13 for installing the driving motor 4.

[0054] Furthermore, if Figure 2 、 Figure 3 As shown, the cleaning device includes a positioning guide wheel 11 that limits the cleaning frame 2. The cleaning frame 2 is provided with a mounting opening 12 for mounting the positioning guide wheel 11, and the positioning guide wheel 11 abuts against the outer wall of the air filter 1.

[0055] The cleaning frame 2 is positioned relative to the air filter 1 by means of a positioning guide wheel 11. The detachable cleaning brush 3 is fixed to the cleaning frame 2. The relative position of the cleaning brush 3 and the air filter surface is accurately controlled by the positioning guide wheel 11 to ensure the normal operation of the cleaning work and the debris removal device. The driven gear plate 6 is connected to the cleaning frame 2 and the drive motor 4, driving the cleaning frame 2 to rotate with the drive motor 4. In addition to having a gear transmission function, the driven gear plate 6 indirectly fixes the cleaning frame 2 because the drive motor 4 is connected to the air filter 1. The driven gear plate 6 is separated between the cleaning frame 2 and the drive motor 4 to prevent the drive motor 4 from directly connecting to the cleaning frame 2 and colliding with the cleaning frame 2 during rotation, thereby protecting the drive motor 4.

[0056] Preferably, multiple cleaning brushes 3 are provided along the circumference of the cleaning frame 2, and positioning guide wheels 11 are provided above and below each cleaning brush 3. Positioning guide wheels 11 are fixed to the cleaning frame 2 via guide wheel shafts 18. The provision of multiple cleaning brushes 3 allows for a higher frequency of debris removal from the outer surface of the air filter 1 during rotation. The provision of positioning guide wheels 11 above and below each cleaning brush 3 not only helps maintain accurate positioning between the upper and lower ends of the cleaning brush 3 and the air filter 1, but also helps ensure the synchronization of the overall rotation of the cleaning brush 3, thereby maintaining the smoothness and stability of the rotation of the cleaning frame 2 and the cleaning brush 3.

[0057] In one embodiment, Figures 7 to 10 As shown, the air filter 1 is provided with an air avoidance channel 17 , and a power supply line 14 connected to the drive motor 4 is provided in the air avoidance channel 17 for the drive motor 4 to operate.

[0058] Furthermore, a first opening 15 is provided at the top of the air filter 1 for the power supply line 14 to pass through, and a second opening 16 is provided at the bottom of the air filter 1 for the power supply line 14 to pass through. The first opening 15 and the second opening 16 are connected to form an air avoidance channel 17.

[0059] An air avoidance channel 17 is provided inside the air filter 1 for laying the power supply line 14. On the one hand, the power supply line 14 is protected to avoid line exposure and loss. On the other hand, the power supply line 14 can be laid as short as possible for easy operation and connection.

[0060] In addition, if Figure 4 、 Figure 8 As shown, the assembly opening 13 for installing the drive motor 4 is communicated with the air avoidance channel 17 to facilitate the laying of the power supply line 14 and to achieve the limiting and protection effects for the power supply line 14 .

[0061] It should be noted that the cleaning device can operate according to a preset controller program or under active human control, and its control mode can be automatic or manual. When the engine is started, the controller begins to read vehicle and engine signals in real time to determine the operating condition and control the self-cleaning function. The purpose of automatic control is to identify the coolant temperature and intake air temperature to determine the radiator blockage level, compare the corresponding cleaning frequencies of the two single variables, and execute the higher cleaning frequency level. Because higher water temperature and intake air temperature are believed to increase the speed of radiator blockage and cause temperature rise, the rate of debris adhesion to the surface of air filter 1 is also faster, and a higher cleaning frequency is required.

[0062] The control principle is to reduce the frequency of the self-cleaning function as much as possible to reduce power (fuel) consumption and extend the service life of the cleaning brush 3. Therefore, different cleaning frequencies are designed according to the speed of adsorbing debris under the operating conditions of the entire vehicle.

[0063] Furthermore, the self-cleaning function can be turned on or off depending on the working conditions. For example, during transitions, when harvesting is no longer in progress and vehicle speeds are high, debris is significantly reduced and adhesion is minimized. Therefore, the self-cleaning function can be disabled to reduce power consumption and extend the life of the cleaning brush 3. Furthermore, to avoid extreme environments, a function that can be manually activated as needed is designed. Preferably, manual control takes priority over automatic control.

[0064] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0065] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0066] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included within the scope of the claims of the present application.

Claims

1. A self-cleaning air filter, wherein the air filter (1) is provided with an air inlet hole (101) on its surface, characterized in that: The invention comprises a cleaning device, wherein the cleaning device comprises a cleaning frame (2) sleeved on the outside of the air filter (1), the cleaning frame (2) is detachably provided with a cleaning brush (3), the bristles of the cleaning brush (3) abut against the outer wall of the air filter (1), and the cleaning device comprises a driving component connected to the cleaning frame (2), the driving component drives the cleaning frame (2) to drive the cleaning brush (3) to rotate along the circumference of the air filter (1) to brush off the debris at the air inlet (101).

2. A self-cleaning air filter according to claim 1, characterized in that: The outer wall of the air filter (1) is provided with a debris peeling portion, the debris peeling portion comprising a stripper (9) for scraping the cleaning brush (3) and a shedding area (10) located on one side of the stripper (9) and not provided with the air inlet hole (101); the cleaning brush (3) is scraped by the stripper (9) and moves to the shedding area (10) so that debris falls off the cleaning brush (3) in the shedding area (10).

3. A self-cleaning air filter according to claim 2, characterized in that: The stripper (9) comprises a stripping plate (91) arranged in a vertical direction, wherein the stripping plate (91) at least partially overlaps with a vertical projection of the cleaning brush (3).

4. A self-cleaning air filter according to claim 3, characterized in that: At least two stripping plates (91) are provided, and at least two of the stripping plates (91) are axially staggered.

5. The self-cleaning air filter according to claim 1, characterized in that: The cleaning frame (2) is provided with a limiting groove, and the cleaning brush (3) is provided with a limiting block adapted to the limiting groove, wherein the limiting block is connected to the limiting groove so that the cleaning brush (3) is engaged with the cleaning frame (2).

6. The self-cleaning air filter according to claim 1, characterized in that: The driving assembly comprises a driving motor (4), a driving gear (5) drivingly connected to the driving motor (4), and a driven gear plate (6) drivingly connected to the driving gear (5); the driven gear plate (6) is fixed to the cleaning frame (2); and the bottom of the driving motor (4) is fixed to the top of the air filter (1).

7. The self-cleaning air filter according to claim 1, characterized in that: The cleaning device comprises a positioning guide wheel (11) for limiting the position of the cleaning frame (2); the cleaning frame (2) is provided with a mounting opening (12) for mounting the positioning guide wheel (11), and the positioning guide wheel (11) abuts against the outer wall of the air filter (1).

8. The self-cleaning air filter according to claim 7, characterized in that: A plurality of cleaning brushes (3) are provided along the circumference of the cleaning frame (2), and the positioning guide wheel (11) is provided above and below each cleaning brush (3).

9. The self-cleaning air filter according to claim 6, characterized in that: The air filter (1) is provided with an air avoidance channel (17), and a power supply line (14) connected to the drive motor (4) is provided in the air avoidance channel (17) for the operation of the drive motor (4).

10. A self-cleaning air filter (1) according to claim 9, characterized in that: The top of the air filter (1) is provided with a first opening (15) for allowing the power supply line (14) to pass through, and the bottom of the air filter (1) is provided with a second opening (16) for allowing the power supply line (14) to pass through, and the first opening (15) and the second opening (16) are connected to form the air avoidance channel (17).

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