Variable-frequency speed regulation control cabinet of centrifugal machine and working method of variable-frequency speed regulation control cabinet

Abstract

The invention belongs to the technical field of centrifugal machine control equipment, and discloses a centrifugal machine frequency conversion speed regulation control cabinet and a working method thereof.The centrifugal machine frequency conversion speed regulation control cabinet comprises a cabinet body, a cabinet door is hinged to one side of the cabinet body, ventilation filter screens are fixedly installed on the two sides of the cabinet body, a cleaning assembly is arranged outside one ventilation filter screen, and a ventilation fan is installed in the cabinet body; the cleaning assembly comprises a brush plate arranged outside the ventilation filter screen, bristles are evenly installed on the side, close to the ventilation filter screen, of the brush plate, connecting shafts are fixedly connected to one sides of the two ends of the brush plate, moving seats are installed at the ends, away from the brush plate, of the two connecting shafts, and the inner wall of one moving seat is in threaded connection with a reciprocating lead screw. In the working process, the ventilation fan is started for ventilation and heat dissipation, meanwhile, the brush plate moves to drive the bristles to move to clean the outer wall of the ventilation filter screen, the interweaving structure of catkin fibers is damaged through physical brushing, the catkin fibers are prevented from being interwoven into a cluster to block the ventilation filter screen, and therefore long-term stable operation of the centrifugal machine frequency conversion speed regulation control cabinet is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of centrifuge control equipment, and in particular relates to a centrifuge variable frequency speed regulation control cabinet and a working method thereof. Background Art

[0002] Centrifuges are key equipment for achieving solid-liquid separation, liquid-liquid separation, or particle classification in the industrial field. The stability and speed regulation accuracy of their drive systems directly affect production efficiency and product quality. With the maturity of variable frequency speed regulation technology, centrifuge variable frequency speed regulation control cabinets have gradually become the mainstream solution in the industry due to their advantages such as high efficiency and energy saving, wide speed regulation range, and fast dynamic response.

[0003] However, in outdoor or complex working conditions (such as around textile factories, areas with flying catkins, and dusty environments), fibrous foreign matter such as catkins and cotton wool are light in texture and have strong fiber interweaving. They are more likely to accumulate at the heat dissipation vents than ordinary dust, forming a dense blocking layer that hinders air circulation, causing the temperature inside the cabinet to rise sharply, which in turn causes the inverter to overheat, accelerate component aging, and even equipment shutdown failure. Summary of the Invention

[0004] The object of the present invention is to provide a centrifuge variable frequency speed control cabinet and a working method thereof, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a centrifuge variable frequency speed control cabinet, comprising a cabinet body, a cabinet door hingedly connected to one side of the cabinet body, ventilation filters fixedly installed on both sides of the cabinet body, a cleaning assembly provided on the outside of one of the ventilation filters, and a ventilation fan installed inside the cabinet body;

[0006] The cleaning assembly includes a brush plate arranged outside the ventilation filter, and bristles are evenly installed on the side of the brush plate close to the ventilation filter. One side of both ends of the brush plate is fixedly connected to a connecting shaft, and the ends of the two connecting shafts away from the brush plate are both installed with a movable seat, and the two movable seats are both slidably mounted on the inner wall of the cabinet, and the inner wall of one of the movable seats is threadedly connected to a reciprocating screw rod;

[0007] A rotating ring is fixedly installed on the outer wall of the ventilation fan, and the top end of the rotating ring is meshed with a first gear, and a first rotating shaft is fixedly installed inside the first gear, one end of the first rotating shaft is fixedly installed with a first bevel gear, one side of the first bevel gear is meshed with a second bevel gear, one side of the second bevel gear is fixedly installed with a second rotating shaft, and an end of the second rotating shaft away from the second bevel gear is fixedly connected to a third bevel gear, and the bottom end of the third bevel gear is meshed with a fourth bevel gear, and the fourth bevel gear is fixedly installed on the top end of the reciprocating screw rod.

[0008] A filter plate is provided on one side of the ventilation fan, and the filter plates are evenly installed on the outer wall of the third rotating shaft in an annular array.

[0009] The third rotating shaft is fixedly installed on one side of the ventilation fan.

[0010] The filter plates are distributed obliquely.

[0011] One end of the connecting shaft is fixedly connected to a first slider, one end of the first slider is slidably mounted with a guide plate, and the guide plate is fixedly mounted on the inner wall of the cabinet;

[0012] The top end of the first slider is fixedly connected to the second slider. The second slider is slidably mounted inside the moving seat. A spring is mounted between the second slider and the moving seat.

[0013] The first sliding block is slidably connected to the movable seat.

[0014] A push plate is provided on one side of the brush plate, a guide rod is provided below the push plate, and the guide rod is fixedly mounted on the side wall of the cabinet.

[0015] A tension spring is installed between the brush plate and the push plate.

[0016] The two ends of the push plate are installed on the outer wall of the connecting shaft, and the connecting shaft and the push plate are slidably connected as a further technical solution of the present invention.

[0017] A method for operating a centrifuge variable frequency speed control cabinet comprises the following steps:

[0018] S1: During operation, the ventilation fan is started for ventilation and heat dissipation. When the ventilation fan is driven, the rotating ring is driven to rotate, the rotation of the rotating ring drives the rotation of the first gear, the rotation of the first gear drives the rotation of the first rotating shaft, the rotation of the first rotating shaft drives the rotation of the first bevel gear, the rotation of the first bevel gear drives the rotation of the second bevel gear, the rotation of the second bevel gear drives the rotation of the second rotating shaft, the rotation of the second rotating shaft drives the rotation of the third bevel gear, the rotation of the third bevel gear drives the rotation of the fourth bevel gear, the rotation of the fourth bevel gear drives the rotation of the reciprocating screw, the rotation of the reciprocating screw drives the movable seat to reciprocate inside the cabinet, the movement of the movable seat drives the movement of the connecting shaft, the movement of the connecting shaft drives the movement of the brush plate, and the movement of the brush plate drives the movement of the brush bristles to clean the outer wall of the ventilation filter;

[0019] S2: When the movable seat slides on the inner wall of the cabinet, the movement of the movable seat drives the movement of the first slider, and the first slider moves laterally during the sliding process guided by the guide plate. At the same time, the movement of the first slider drives the second slider to slide in the inner wall of the movable seat, causing the spring to deform and store elastic potential energy, and through the release of the elastic potential energy, cooperate with the arc surface of the guide plate to make the first slider move back and forth on the side of the guide plate. The movement of the first slider drives the movement of the connecting shaft, and the movement of the connecting shaft drives the movement of the brush plate, and the movement of the brush plate drives the movement of the bristles, so that the bristles move longitudinally and laterally on the surface of the ventilation filter, thereby comprehensively cleaning the surface of the ventilation filter;

[0020] S3: When the brush plate moves downward, it drives the push plate to move. When the push plate moves to the top of the guide rod, it is guided by its inclined surface to move to the side away from the brush plate, thereby actively pushing out pollutants such as catkins and fibers embedded in the bristles. At the same time, the tension spring deforms to store elastic potential energy. When the push plate moves up and separates from the guide rod, the elastic potential energy is released by the tension spring to cause the push plate to move and reset.

[0021] The beneficial effects of the present invention are as follows:

[0022] The transmission gear of the present invention is a gear which is connected to the transmission gear of the present invention and is a gear which is connected to the transmission gear of the present invention; the transmission gear of the gear is connected to the transmission gear of the present invention; the transmission gear of the gear is connected to the transmission gear of the present invention; the transmission gear of the gear is connected to the transmission gear of the present invention;

[0023] 2. The present invention enables the brush plate to move back and forth laterally on the surface of the ventilation filter. When the movable seat slides on the inner wall of the cabinet, the movement of the movable seat drives the movement of the first slider. The first slider is guided by the guide plate to move laterally during the sliding process. At the same time, the movement of the first slider drives the second slider to slide in the inner wall of the movable seat, causing the spring to deform and store elastic potential energy, and through the release of the elastic potential energy, cooperates with the arc surface of the guide plate to make the first slider move back and forth on the side of the guide plate. The movement of the first slider drives the movement of the connecting shaft, and the movement of the connecting shaft drives the movement of the brush plate, and the movement of the brush plate drives the movement of the bristles, so that the bristles move longitudinally and laterally on the surface of the ventilation filter, which helps to improve the comprehensiveness and cleaning effect of the cleaning of the ventilation filter surface.

[0024] 3. The present invention pushes out the catkin fibers inside the bristles by moving the push plate outward. The brush plate moves downward to drive the push plate to move. When the push plate moves to the top of the guide rod, it is guided by the inclined surface to move the push plate to the side away from the brush plate, thereby actively pushing out pollutants such as catkins and fibers embedded in the bristles. This can significantly improve the self-cleaning ability of the brush plate, extend the life of the bristles, and optimize the cleaning efficiency of the ventilation filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0027] Figure 3 For the present invention Figure 2 A schematic diagram of the structure at center A;

[0028] Figure 4 This is a schematic cross-sectional view of the cabinet structure of the present invention;

[0029] Figure 5 This is a structural diagram of the brush plate of the present invention;

[0030] Figure 6 This is a schematic cross-sectional view of the structure of the movable seat of the present invention;

[0031] Figure 7 It is a structural schematic diagram of the push plate of the present invention.

[0032] In the figure: 1. cabinet body; 2. cabinet door; 3. ventilation filter; 4. ventilation fan; 5. rotating ring; 6. first gear; 7. first rotating shaft; 8. first bevel gear; 9. second bevel gear; 10. second rotating shaft; 11. third bevel gear; 12. fourth bevel gear; 13. reciprocating screw; 14. moving seat; 15. connecting shaft; 16. brush plate; 17. bristles; 18. push plate; 19. guide rod; 20. tension spring; 21. first slider; 22. guide plate; 23. second slider; 24. spring; 25. third rotating shaft; 26. filter plate. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0034] like Figures 1 to 7 As shown, in an embodiment of the present invention, a centrifuge variable frequency speed control cabinet includes a cabinet body 1, a cabinet door 2 is hingedly connected to one side of the cabinet body 1, ventilation filters 3 are fixedly installed on both sides of the cabinet body 1, a cleaning component is provided on the outside of one of the ventilation filters 3, and a ventilation fan 4 is installed inside the cabinet body 1;

[0035] The cleaning assembly includes a brush plate 16 arranged on the outside of the ventilation filter 3, and bristles 17 are evenly installed on the side of the brush plate 16 close to the ventilation filter 3. One side of each end of the brush plate 16 is fixedly connected to a connecting shaft 15, and the ends of the two connecting shafts 15 away from the brush plate 16 are both installed with a movable seat 14. The two movable seats 14 are both slidably mounted on the inner wall of the cabinet 1, and the inner wall of one of the movable seats 14 is threadedly connected to a reciprocating screw rod 13;

[0036] A rotating ring 5 is fixedly installed on the outer wall of the ventilation fan 4, and the top of the rotating ring 5 is meshed and connected with the first gear 6. A first rotating shaft 7 is fixedly installed inside the first gear 6. A first bevel gear 8 is fixedly installed on one end of the first rotating shaft 7, and a second bevel gear 9 is meshed and connected to one side of the first bevel gear 8. A second rotating shaft 10 is fixedly installed on one side of the second bevel gear 9, and an end of the second rotating shaft 10 away from the second bevel gear 9 is fixedly connected to the third bevel gear 11. The bottom end of the third bevel gear 11 is meshed and connected with a fourth bevel gear 12, and the fourth bevel gear 12 is fixedly installed on the top of the reciprocating screw 13.

[0037] During operation, the ventilation fan 4 is started for ventilation and heat dissipation. When the ventilation fan 4 is driven, the rotating ring 5 is driven to rotate. The rotation of the rotating ring 5 drives the rotation of the first gear 6. The rotation of the first gear 6 drives the rotation of the first rotating shaft 7. The rotation of the first rotating shaft 7 drives the rotation of the first bevel gear 8. The rotation of the first bevel gear 8 drives the rotation of the second bevel gear 9. The rotation of the second bevel gear 9 drives the rotation of the second rotating shaft 10. The rotation of the second rotating shaft 10 drives the rotation of the third bevel gear 11. The rotation of the third bevel gear 11 drives the rotation of the fourth bevel gear The rotation of the wheel 12 and the fourth bevel gear 12 drives the rotation of the reciprocating screw 13, and the rotation of the reciprocating screw 13 drives the moving seat 14 to move back and forth inside the cabinet 1, and the movement of the moving seat 14 drives the movement of the connecting shaft 15, and the movement of the connecting shaft 15 drives the movement of the brush plate 16, and the movement of the brush plate 16 drives the bristles 17 to move to clean the outer wall of the ventilation filter 3. The interwoven structure of the catkin fibers is destroyed by physical brushing, and the catkin fibers are prevented from being interwoven into a mass to block the ventilation filter 3, thereby ensuring the long-term stable operation of the centrifuge variable frequency speed control cabinet.

[0038] like Figure 4 As shown, a filter plate 26 is provided on one side of the ventilation fan 4 , and the filter plates 26 are evenly installed on the outer wall of the third rotating shaft 25 in an annular array.

[0039] Large particles of pollutants (such as catkins, cotton wool, and dust clumps) are intercepted by the ventilation filter 3, and fine particles (such as fiber debris and oil mist) are intercepted by the filter plate 26 to ensure the cleanliness of the air entering the cabinet 1. The two work together to perform graded filtration: intercepting pollutants of different particle sizes to ensure the reliability and service life of the equipment.

[0040] like Figure 4 As shown, the third rotating shaft 25 is fixedly installed on one side of the ventilation fan 4.

[0041] When the ventilation fan 4 is driven, the third rotating shaft 25 is driven to rotate. The rotation of the third rotating shaft 25 drives the rotation of the filter plate 26, covering the four sides of the air inlet. When the airflow passes through, it is evenly dispersed to the entire surface of the filter plate 26, avoiding local overload and improving the utilization rate and filtration efficiency of the filter plate 26.

[0042] like Figure 4 As shown, the filter plates 26 are arranged obliquely.

[0043] This makes the pollutants more evenly distributed, avoids overload in local areas due to concentrated airflow, and extends the overall life of the filter plate 26.

[0044] like Figure 6 As shown, one end of the connecting shaft 15 is fixedly connected to the first slider 21, and one end of the first slider 21 is slidably mounted with a guide plate 22, which is fixedly mounted on the inner wall of the cabinet 1;

[0045] A second slider 23 is fixedly connected to the top of the first slider 21 . The second slider 23 is slidably mounted inside the moving seat 14 . A spring 24 is mounted between the second slider 23 and the moving seat 14 .

[0046] When the movable seat 14 slides on the inner wall of the cabinet 1, the movement of the movable seat 14 drives the movement of the first slider 21. During the sliding process, the first slider 21 is guided by the guide plate 22 to move horizontally. At the same time, the movement of the first slider 21 drives the second slider 23 to slide in the inner wall of the movable seat 14, causing the spring 24 to deform and store elastic potential energy, and through its release of elastic potential energy, cooperates with the arc surface of the guide plate 22 to make the first slider 21 move back and forth on the side of the guide plate 22. The movement of the first slider 21 drives the movement of the connecting shaft 15, and the movement of the connecting shaft 15 drives the movement of the brush plate 16. The movement of the brush plate 16 drives the movement of the bristles 17, so that the bristles 17 move longitudinally on the surface of the ventilation filter 3 and move horizontally at the same time, which helps to improve the comprehensiveness and cleaning effect of the surface cleaning of the ventilation filter 3.

[0047] like Figure 6 As shown, the first sliding block 21 is slidably connected to the moving seat 14 .

[0048] like Figure 1 、 Figure 2 、 Figure 4 、 Figure 6 and Figure 7 As shown, a push plate 18 is provided on one side of the brush plate 16 , and a guide rod 19 is provided below the push plate 18 . The guide rod 19 is fixedly mounted on the side wall of the cabinet 1 .

[0049] The top of the guide rod 19 is tilted on one side close to the cabinet 1;

[0050] When the brush plate 16 moves downward, it drives the push plate 18 to move. When the push plate 18 moves to the top of the guide rod 19, it is guided by its inclined surface to move the push plate 18 to the side away from the brush plate 16, thereby actively pushing out pollutants such as catkins and fibers embedded in the bristles 17, which can significantly improve the self-cleaning ability of the brush plate 16, extend the life of the bristles 17 and optimize the cleaning efficiency of the ventilation filter 3.

[0051] like Figures 5 to 7 As shown, a tension spring 20 is installed between the brush plate 16 and the push plate 18.

[0052] When the push plate 18 contacts the guide rod 19 and moves toward the side away from the brush plate 16, the tension spring 20 deforms and stores elastic potential energy. When the push plate 18 moves up and separates from the guide rod 19, the elastic potential energy is released by the tension spring 20, causing the push plate 18 to move back to its original position.

[0053] Through holes for the bristles 17 to be embedded are evenly opened inside the push plate 18. The distance that the push plate 18 moves outward is less than the length of the bristles 17, which is convenient for resetting.

[0054] like Figures 5 to 7 As shown, both ends of the push plate 18 are installed on the outer wall of the connecting shaft 15, and the connecting shaft 15 and the push plate 18 are slidably connected.

[0055] A method for operating a centrifuge variable frequency speed control cabinet comprises the following steps:

[0056] S1: During operation, the ventilation fan 4 is started for ventilation and heat dissipation. When the ventilation fan 4 is driven, the rotating ring 5 is driven to rotate. The rotation of the rotating ring 5 drives the rotation of the first gear 6. The rotation of the first gear 6 drives the rotation of the first rotating shaft 7. The rotation of the first rotating shaft 7 drives the rotation of the first bevel gear 8. The rotation of the first bevel gear 8 drives the rotation of the second bevel gear 9. The rotation of the second bevel gear 9 drives the rotation of the second rotating shaft 10. The rotation of the second rotating shaft 10 drives the rotation of the third bevel gear 11. The rotation of the third bevel gear 11 drives the rotation of the fourth bevel gear 12. The rotation of the fourth bevel gear 12 drives the rotation of the reciprocating screw 13. The rotation of the reciprocating screw 13 drives the movable seat 14 to reciprocate inside the cabinet 1. The movement of the movable seat 14 drives the movement of the connecting shaft 15. The movement of the connecting shaft 15 drives the movement of the brush plate 16. The movement of the brush plate 16 drives the bristles 17 to move to clean the outer wall of the ventilation filter 3.

[0057] S2: When the movable seat 14 slides on the inner wall of the cabinet 1, the movement of the movable seat 14 drives the movement of the first slider 21. During the sliding process, the first slider 21 is guided by the guide plate 22 to move laterally. At the same time, the movement of the first slider 21 drives the second slider 23 to slide in the inner wall of the movable seat 14, causing the spring 24 to deform and store elastic potential energy, and through the release of the elastic potential energy, cooperates with the arc surface of the guide plate 22 to make the first slider 21 move back and forth on the side of the guide plate 22. The movement of the first slider 21 drives the movement of the connecting shaft 15. The movement of the connecting shaft 15 drives the movement of the brush plate 16. The movement of the brush plate 16 drives the movement of the bristles 17, so that the bristles 17 move longitudinally and laterally on the surface of the ventilation filter 3, thereby comprehensively cleaning the surface of the ventilation filter 3;

[0058] S3: When the brush plate 16 moves downward, it drives the push plate 18 to move. When the push plate 18 moves to the top of the guide rod 19, it is guided by its inclined surface to move the push plate 18 to the side away from the brush plate 16, thereby actively pushing out pollutants such as catkins and fibers embedded in the bristles 17. At the same time, the tension spring 20 deforms to store elastic potential energy. When the push plate 18 moves upward and separates from the guide rod 19, the elastic potential energy is released by the tension spring 20 to move the push plate 18 back to its original position.

[0059] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A centrifuge variable frequency speed control cabinet, comprising a cabinet body (1), characterized in that: A cabinet door (2) is hingedly connected to one side of the cabinet body (1), ventilation filters (3) are fixedly installed on both sides of the cabinet body (1), a cleaning component is provided on the outside of one of the ventilation filters (3), and a ventilation fan (4) is installed inside the cabinet body (1); The cleaning assembly comprises a brush plate (16) arranged outside the ventilation filter (3), bristles (17) are evenly installed on the side of the brush plate (16) close to the ventilation filter (3), one side of both ends of the brush plate (16) is fixedly connected to a connecting shaft (15), and one end of the two connecting shafts (15) away from the brush plate (16) is installed with a movable seat (14), and the two movable seats (14) are slidably installed on the inner wall of the cabinet (1), and the inner wall of one of the movable seats (14) is threadedly connected to a reciprocating screw rod (13); A rotating ring (5) is fixedly mounted on the outer wall of the ventilation fan (4); the top end of the rotating ring (5) is meshedly connected with a first gear (6); a first rotating shaft (7) is fixedly mounted inside the first gear (6); a first bevel gear (8) is fixedly mounted on one end of the first rotating shaft (7); a second bevel gear (9) is meshedly connected to one side of the first bevel gear (8); a second rotating shaft (10) is fixedly mounted on one side of the second bevel gear (9); a third bevel gear (11) is fixedly connected to one end of the second rotating shaft (10) away from the second bevel gear (9); a fourth bevel gear (12) is meshedly connected to the bottom end of the third bevel gear (11); and the fourth bevel gear (12) is fixedly mounted on the top end of the reciprocating screw (13).

2. A centrifuge variable frequency speed control cabinet according to claim 1, characterized in that: A filter plate (26) is provided on one side of the ventilation fan (4), and the filter plates (26) are evenly installed on the outer wall of the third rotating shaft (25) in an annular array.

3. A centrifuge variable frequency speed control cabinet according to claim 2, characterized in that: The third rotating shaft (25) is fixedly mounted on one side of the ventilation fan (4).

4. A centrifuge variable frequency speed control cabinet according to claim 2, characterized in that: The filter plates (26) are distributed obliquely.

5. The centrifuge variable frequency speed control cabinet according to claim 1, characterized in that: One end of the connecting shaft (15) is fixedly connected to a first slider (21), one end of the first slider (21) is slidably mounted with a guide plate (22), and the guide plate (22) is fixedly mounted on the inner wall of the cabinet (1); The top end of the first slider (21) is fixedly connected to a second slider (23), the second slider (23) is slidably mounted inside the movable seat (14), and a spring (24) is mounted between the second slider (23) and the movable seat (14).

6. A centrifuge variable frequency speed control cabinet according to claim 5, characterized in that: The first sliding block (21) is slidably connected to the movable seat (14).

7. The centrifuge variable frequency speed control cabinet according to claim 1, characterized in that: A push plate (18) is provided on one side of the brush plate (16), a guide rod (19) is provided below the push plate (18), and the guide rod (19) is fixedly mounted on the side wall of the cabinet (1).

8. The centrifuge variable frequency speed control cabinet according to claim 1, characterized in that: A tension spring (20) is installed between the brush plate (16) and the push plate (18).

9. A centrifuge variable frequency speed control cabinet according to claim 8, characterized in that: Both ends of the push plate (18) are mounted on the outer wall of the connecting shaft (15), and the connecting shaft (15) and the push plate (18) are slidably connected.

10. A method for operating a centrifuge variable frequency speed control cabinet, the method being applicable to the centrifuge variable frequency speed control cabinet according to claims 1 to 9, characterized in that: The following steps are involved: S1: When working, the ventilation fan (4) is started to ventilate and dissipate heat. When the ventilation fan (4) is driven, the rotating ring (5) is driven to rotate. The rotation of the rotating ring (5) drives the rotation of the first gear (6). The rotation of the first gear (6) drives the rotation of the first rotating shaft (7). The rotation of the first rotating shaft (7) drives the rotation of the first bevel gear (8). The rotation of the first bevel gear (8) drives the rotation of the second bevel gear (9). The rotation of the second bevel gear (9) drives the rotation of the second rotating shaft (10). The rotation of the second rotating shaft (10) drives the rotation of the first bevel gear (8). The rotation of the three bevel gears (11) drives the rotation of the fourth bevel gear (12), the rotation of the fourth bevel gear (12) drives the rotation of the reciprocating screw (13), the rotation of the reciprocating screw (13) drives the movable seat (14) to move back and forth inside the cabinet (1), the movement of the movable seat (14) drives the movement of the connecting shaft (15), the movement of the connecting shaft (15) drives the movement of the brush plate (16), and the movement of the brush plate (16) drives the movement of the brush bristles (17) to clean the outer wall of the ventilation filter (3); S2: When the movable seat (14) slides on the inner wall of the cabinet (1), the movement of the movable seat (14) drives the movement of the first slider (21). The first slider (21) moves laterally guided by the guide plate (22) during the sliding process. At the same time, the movement of the first slider (21) drives the second slider (23) to slide in the inner wall of the movable seat (14), causing the spring (24) to deform and store elastic potential energy, and releases the elastic potential energy to cooperate with the arc surface of the guide plate (22) to make the first slider (21) move back and forth on the side of the guide plate (22). The movement of the first slider (21) drives the movement of the connecting shaft (15). The movement of the connecting shaft (15) drives the movement of the brush plate (16). The movement of the brush plate (16) drives the movement of the bristles (17), so that the bristles (17) move longitudinally and laterally on the surface of the ventilation filter (3), thereby comprehensively cleaning the surface of the ventilation filter (3); S3: When the brush plate (16) moves downward, it drives the push plate (18) to move. When the push plate (18) moves to the top of the guide rod (19), the push plate (18) is guided by its inclined surface to move to the side away from the brush plate (16), thereby actively pushing out pollutants such as catkins and fibers embedded in the bristles (17). At the same time, the tension spring (20) deforms to store elastic potential energy. When the push plate (18) moves upward and separates from the guide rod (19), the elastic potential energy is released by the tension spring (20) to move the push plate (18) back to its original position.

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