Self-cleaning mechanism of differential rotation type multi-stage air purification filter cartridge

Abstract

The invention discloses a self-cleaning mechanism of a differential rotation type multi-stage air purification filter cartridge, and relates to the technical field of air purification equipment. The device comprises a purification shell, a first filter cartridge is arranged in the purification shell, the surface of the first filter cartridge is sleeved with a second filter cartridge, and the surface of the second filter cartridge is sleeved with a third filter cartridge; a driving assembly is arranged at the top of the purifying shell and comprises a driving motor arranged at the top of the purifying shell and a transmission rod installed at the output end of the driving motor. Through meshing transmission of a sun gear and a planetary gear in the driving assembly, differential rotation of the first filter cartridge and the second filter cartridge is achieved, attached particles are stripped in a layered mode through centrifugal force, the self-cleaning efficiency is remarkably improved, the differential design breaks through a static filtering mode of a traditional filter cartridge, particulate matter deposition inertia can be actively destroyed, and surface dust accumulation of a filter material is reduced; the problem of filtering efficiency attenuation caused by dust accumulation is avoided, the service life of the filter cartridge is prolonged, and the maintenance frequency is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of air purification equipment, and particularly relates to a self-cleaning mechanism for a differential rotation type multi-stage air purification filter cartridge. Background Art

[0002] With the acceleration of industrial development and urbanization, the problem of air pollution has become increasingly severe, and the demand for air purification equipment has increased sharply. The core component of traditional air purification devices is the filter cartridge structure. Its working principle is to intercept particulate matter (such as PM2.5, pollen, dust), harmful gases, and microorganisms in the air through multiple layers of filter media with different pore sizes. In addition to particulate matter, the filter cartridge can also adsorb and decompose harmful gases. During the industrial production process, volatile organic compounds such as formaldehyde and benzene may be released. These harmful gases can not only damage the respiratory tract and nervous system of the human body, but long-term exposure may also cause serious diseases such as cancer. The special filter material in the filter cartridge can react chemically with these harmful gases and convert them into harmless substances, thereby achieving the purpose of purifying the air.

[0003] Existing air purification filter cartridges rely on unidirectional air flow and fixed structures to filter pollutants. When fine particulate matter penetrates the primary filter layer, it will gradually accumulate on the surface layer of the subsequent filter cartridges to form a dense dust accumulation layer. As the dust accumulation increases, the effective filtration area of the filter cartridge decreases, resulting in a sharp rise in the pressure difference. When the pressure difference exceeds the threshold, the entire filter cartridge needs to be replaced, leading to high maintenance costs and significant waste of resources. Therefore, we provide a self-cleaning mechanism for a differential rotation type multi-stage air purification filter cartridge to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a self-cleaning mechanism for a differential rotation type multi-stage air purification filter cartridge. Through the cooperation of a driving component, an adjusting component, and a cleaning component, it solves the problem that in the existing air purification filter cartridge, a dense dust accumulation layer gradually forms on the surface layer of the subsequent filter cartridges. As the dust accumulation increases, the effective filtration area of the filter cartridge decreases, affecting the filtration effect.

[0005] To solve the above technical problems, the present invention is realized through the following technical solutions.

[0006] The present invention relates to a self-cleaning mechanism for a differential rotation type multi-stage air purification filter cartridge, which includes a purification shell. Inside the purification shell, a first filter cartridge is provided. A second filter cartridge is sleeved on the surface of the first filter cartridge, and a third filter cartridge is sleeved on the surface of the second filter cartridge. A driving component is arranged at the top of the purification shell. The driving component includes a driving motor arranged at the top of the purification shell, a transmission rod installed at the output end of the driving motor, a sun gear installed on the surface of the transmission rod, and a planetary gear meshed with one side of the sun gear. The rotation speeds of the first filter cartridge and the second filter cartridge are adjusted through the driving component. A regulating component is arranged at the bottom of the driving motor. The regulating component includes a transmission pipe movably connected to the surface of the transmission rod, a first bevel gear installed on the surface of the transmission pipe, a support pipe movably connected to the surface of the transmission pipe, a second bevel gear installed on the surface of the support pipe, and a third bevel gear meshed between the first bevel gear and the second bevel gear. The rotation direction of the third filter cartridge is adjusted through the regulating component. A cleaning component is arranged inside the purification shell. The cleaning component includes a cleaning brush arranged on one side of the first filter cartridge, the second filter cartridge, and the third filter cartridge. The dust adhered to the surfaces of the first filter cartridge, the second filter cartridge, and the third filter cartridge is cleaned through the cleaning component.

[0007] The present invention is further arranged such that the driving component further includes a rotating shell installed on the surface of the transmission pipe, a movable shaft movably connected inside the planetary gear, and an internal gear ring meshed with one side of the planetary gear. The bottom of the movable shaft is fixedly connected to the inner wall of the rotating shell.

[0008] The present invention is further arranged such that the surface of the internal gear ring is fixedly connected with a mounting shell, the bottom of the mounting shell is fixedly connected with a bottom shell, the bottom shell is fixedly connected with the purification shell, the bottom of the transmission rod is fixedly connected with the first filter cartridge, the bottom of the transmission pipe is fixedly connected with the second filter cartridge, and the bottom of the support pipe is fixedly connected with the third filter cartridge.

[0009] The present invention is further arranged such that the cleaning component further includes a rotating rod installed on one side of the third bevel gear, a cam installed on the surface of the rotating rod, a push plate slidably connected to the bottom of the cam, a moving rod installed on the bottom of the push plate, an air delivery shell installed at the bottom of the purification shell, a gas storage tank installed on one side of the air delivery shell, and a spray head arranged inside the first filter cartridge.

[0010] The present invention is further arranged such that one side of the cleaning brush is fixedly connected with a connecting rod, one side of the connecting rod is fixedly connected with the moving rod, a piston plate is slidably connected inside the air delivery shell, the bottom of the moving rod penetrates through the air delivery shell and is fixedly connected with the piston plate, the bottom of the air delivery shell is respectively communicated with a compressed air inlet pipe and a compressed air exhaust pipe, and one-way valve flaps are installed inside both the compressed air inlet pipe and the compressed air exhaust pipe, and the directions of the two groups of one-way valve flaps are opposite.

[0011] The present invention is further configured such that an air delivery pipe is connected between the compressed exhaust pipe and the gas storage tank. The other side of the gas storage tank is connected with a pressurizing pipe. The other end of the pressurizing pipe penetrates into the purification housing and is connected with a spray head. An electromagnetic valve is sleeved on the surface of the pressurizing pipe.

[0012] The present invention is further configured such that a first spring is sleeved on the surface of the moving rod. A second spring is fixedly connected to the bottom of the piston plate. One end of the first spring is fixedly connected to the purification housing.

[0013] The present invention is further configured such that an air intake pipe is connected to one side of the purification housing. An air exhaust pipe is connected to the bottom of the purification housing.

[0014] The present invention is further configured such that a dust discharge port is formed on one side of the purification housing. A guiding housing is installed on one side of the purification housing. A dust collection box is connected to the bottom of the guiding housing.

[0015] The present invention is further configured such that a shutter is slidably connected inside the dust discharge port. One side of the shutter is fixedly connected to a connecting plate. A fixing screw rod is disposed through the bottom of the connecting plate. The top of the fixing screw rod is threadedly connected to the purification housing. Partition plates are rotatably connected to the surfaces of the second filter cartridge and the third filter cartridge through bearings.

[0016] The present invention has the following beneficial effects.

[0017] 1. Through the meshing transmission between the sun gear and the planetary gears in the driving assembly, the present invention realizes the differential rotation of the first and second filter cartridges, uses centrifugal force to layer and peel off the attached particles, significantly improves the self-cleaning efficiency. The differential design breaks the traditional static filtration mode of the filter cartridge, can actively destroy the deposition inertia of particulate matter, reduce the dust accumulation on the filter material surface, avoid the problem of filtration efficiency attenuation caused by dust accumulation, extend the service life of the filter cartridge and reduce the maintenance frequency.

[0018] 2. In the present invention, through the meshing transmission of the bevel gear set in the adjusting assembly, the third filter cartridge obtains a rotation direction opposite to that of the first and second filter cartridges, forming a dynamic cleaning field. This structure, combined with the synchronous movement of the cleaning brush, can eliminate the phenomenon of directional accumulation of particulate matter, ensure uniform force cleaning on the surfaces of each filter cartridge. At the same time, the driving motor can achieve multi-stage reverse rotation without an additional power source, saves energy compared with the traditional single-stage driving scheme, and has a compact structure suitable for limited installation space.

[0019] Of course, it is not necessary for any product implementing the present invention to achieve all the above advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below.

[0021] Figure 1 It is a three-dimensional view of the self-cleaning mechanism of the differential rotation type multi-stage air purification filter cartridge.

[0022] Figure 2 It is a cross-sectional view of the internal structure of the purification shell in the self-cleaning mechanism of the differential rotation type multi-stage air purification filter cartridge.

[0023] Figure 3 It is a cross-sectional view of the mounting shell, bottom shell and rotating shell in the self-cleaning mechanism of the differential rotation type multi-stage air purification filter cartridge.

[0024] Figure 4 It is a top cross-sectional view of the rotating shell in the self-cleaning mechanism of the differential rotation type multi-stage air purification filter cartridge.

[0025] Figure 5 It is a cross-sectional view of the first filter cartridge in the self-cleaning mechanism of the differential rotation type multi-stage air purification filter cartridge.

[0026] Figure 6 It is a separation schematic diagram of the cleaning brush and the first filter cartridge, second filter cartridge and third filter cartridge in the self-cleaning mechanism of the differential rotation type multi-stage air purification filter cartridge.

[0027] Figure 7 It is a cross-sectional view of the air conveying shell, compressed air inlet pipe and compressed air exhaust pipe in the self-cleaning mechanism of the differential rotation type multi-stage air purification filter cartridge.

[0028] Figure 8 It is a schematic diagram of the downward movement of the baffle in the self-cleaning mechanism of the differential rotation type multi-stage air purification filter cartridge.

[0029] In the attached drawings: 1. Purification shell; 2. First filter cartridge; 3. Second filter cartridge; 4. Third filter cartridge; 5. Driving motor; 6. Transmission rod; 7. Sun gear; 8. Planet gear; 9. Transmission pipe; 10. First bevel gear; 11. Support pipe; 12. Second bevel gear; 13. Third bevel gear; 14. Cleaning brush; 15. Rotating shell; 16. Moving shaft; 17. Internal gear ring; 18. Mounting shell; 19. Bottom shell; 20. Rotating rod; 21. Cam; 22. Push plate; 23. Moving rod; 24. Air conveying shell; 25. Air storage tank; 26. Nozzle; 27. Connecting rod; 28. Piston plate; 29. Compressed air inlet pipe; 30. Compressed air exhaust pipe; 31. Check valve flap; 32. Air transmission pipe; 33. Pressurizing pipe; 34. Solenoid valve; 35. First spring; 36. Second spring; 37. Air inlet pipe; 38. Air exhaust pipe; 39. Dust discharge port; 40. Guide shell; 41. Dust collection box; 42. Baffle; 43. Connecting plate; 44. Fixed screw; 45. Partition plate. Specific implementation manner

[0030] The technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Embodiment

[0031] Please refer to Figures 1 - 8 , the present invention is a self-cleaning mechanism for a differential rotation type multi-stage air purification filter cartridge, including a purification shell 1. A first filter cartridge 2 is arranged inside the purification shell 1. A second filter cartridge 3 is sleeved on the surface of the first filter cartridge 2. A third filter cartridge 4 is sleeved on the surface of the second filter cartridge 3. A driving component is arranged at the top of the purification shell 1. The driving component includes a driving motor 5 arranged at the top of the purification shell 1, a transmission rod 6 installed at the output end of the driving motor 5, a sun gear 7 installed on the surface of the transmission rod 6, and a planetary gear 8 meshed with one side of the sun gear 7. The rotation speeds of the first filter cartridge 2 and the second filter cartridge 3 are adjusted through the driving component. A regulating component is arranged at the bottom of the driving motor 5. The regulating component includes a transmission pipe 9 movably connected to the surface of the transmission rod 6, a first bevel gear 10 installed on the surface of the transmission pipe 9, a support pipe 11 movably connected to the surface of the transmission pipe 9, a second bevel gear 12 installed on the surface of the support pipe 11, and a third bevel gear 13 meshed between the first bevel gear 10 and the second bevel gear 12. The rotation direction of the third filter cartridge 4 is adjusted through the regulating component. A cleaning component is arranged inside the purification shell 1. The cleaning component includes a cleaning brush 14 arranged on one side of the first filter cartridge 2, the second filter cartridge 3, and the third filter cartridge 4. The dust adhered to the surfaces of the first filter cartridge 2, the second filter cartridge 3, and the third filter cartridge 4 is cleaned through the cleaning component.

[0032] Specifically: The third filter cartridge 4, the second filter cartridge 3, and the first filter cartridge 2 are all made of metal filter cartridge materials, and the filter pore diameters of the three groups of filter cartridges are set to decrease in sequence. When the external air enters the purification housing 1 through the air inlet pipe 37, it sequentially enters the third filter cartridge 4, the second filter cartridge 3, and the first filter cartridge 2, and is gradually filtered through the filter holes with sequentially decreasing pore diameters, effectively improving the air purification effect. The sun gear 7 can rotate following the drive rod 6. When the drive rod 6 rotates, it drives the first filter cartridge 2 to rotate. When the sun gear 7 rotates, it drives the three planetary gears 8 to rotate synchronously, enabling the first filter cartridge 2 driven by the drive rod 6 to rotate rapidly, and the second filter cartridge 3 driven by the planetary gears 8 to rotate slowly, maintaining differential rotation of the two filter cartridges. Larger dust particles can be separated through the centrifugal action of rotation. A third bevel gear 13 is meshed between the first bevel gear 10 and the second bevel gear 12, which can make the rotation direction of the second bevel gear 12 opposite to that of the first bevel gear 10 when the first bevel gear 10 rotates, making the rotation directions of the second filter cartridge 3 and the third filter cartridge 4 opposite. Through the design of different rotation speeds and rotation directions of the first filter cartridge 2, the second filter cartridge 3, and the third filter cartridge 4, dust will not adhere to the surface of the cartridge wall regularly, and at the same time, it provides driving force for subsequent cleaning. Embodiment

[0033] Please refer to Figures 1 - 8 , on the basis of Embodiment 1, the drive assembly further includes a rotating housing 15 installed on the surface of the drive pipe 9, a movable shaft 16 movably connected inside the planetary gear 8, an internal gear ring 17 meshed on one side of the planetary gear 8. The bottom of the movable shaft 16 is fixedly connected to the inner wall of the rotating housing 15. The surface of the internal gear ring 17 is fixedly connected with a mounting housing 18. The bottom of the mounting housing 18 is fixedly connected with a bottom housing 19. The bottom of the bottom housing 19 is fixedly connected to the purification housing 1. The bottom of the drive rod 6 is fixedly connected to the first filter cartridge 2. The bottom of the drive pipe 9 is fixedly connected to the second filter cartridge 3. The bottom of the support pipe 11 is fixedly connected to the third filter cartridge 4. The cleaning assembly further includes a rotating rod 20 installed on one side of the third bevel gear 13, a cam 21 installed on the surface of the rotating rod 20, a push plate 22 slidably connected to the bottom of the cam 21, a moving rod 23 installed on the bottom of the push plate 22, an air delivery housing 24 installed on the bottom of the purification housing 1, a gas storage tank 25 installed on one side of the air delivery housing 24, a nozzle 26 arranged inside the first filter cartridge 2. One side of the cleaning brush 14 is fixedly connected with a connecting rod 27, and one side of the connecting rod 27 is fixedly connected to the moving rod 23. A piston plate 28 is slidably connected inside the air delivery housing 24. The bottom of the moving rod 23 penetrates through the air delivery housing 24 and is fixedly connected to the piston plate 28. The bottom of the air delivery housing 24 is respectively communicated with a compressed air inlet pipe 29 and a compressed air outlet pipe 30. One-way valve flaps 31 are installed inside both the compressed air inlet pipe 29 and the compressed air outlet pipe 30, and the directions of the two one-way valve flaps 31 are opposite.

[0034] Specifically: The cleaning brushes 14 are respectively installed on both sides of the connecting rod 27. Brush hairs are installed on the surfaces of the cleaning brushes 14 on both sides. The brush hairs are respectively in contact with the surface of the first filter cylinder 2, the inner wall and the surface of the second filter cylinder 3, and the surface of the third filter cylinder 4 and the inner wall of the purification shell 1. When the three groups of filter cylinders rotate, the positions of the cleaning brushes 14 remain unchanged, and the inner surfaces and outer surfaces of the three groups of filter cylinders can be synchronously cleaned. After the caked dust particles are cleaned, affected by their own weight, they can fall to the top of the partition plate 45 for collection. The surface of the transmission rod 6 is movably connected to the inner wall of the transmission pipe 9 through a bearing. The surface of the transmission pipe 9 is movably connected to the inner wall of the support pipe 11 through a bearing. The surface of the support pipe 11 is movably connected to the inner wall of the purification shell 1 through a bearing. The surface of the rotating rod 20 is movably connected to the inner wall of the bottom shell 19 through a bearing. Embodiment

[0035] Please refer to Figures 1 - 8 , on the basis of Embodiment 1 and Embodiment 2, a gas transmission pipe 32 is connected between the compressed exhaust pipe 30 and the gas storage tank 25. The other side of the gas storage tank 25 is connected with a pressurizing pipe 33. The other end of the pressurizing pipe 33 penetrates into the purification shell 1 and is connected with the nozzle 26. An electromagnetic valve 34 is sleeved on the surface of the pressurizing pipe 33. A first spring 35 is sleeved on the surface of the moving rod 23. A second spring 36 is fixedly connected to the bottom of the piston plate 28. One end of the first spring 35 is fixedly connected to the purification shell 1. An air inlet pipe 37 is connected to one side of the purification shell 1. An air exhaust pipe 38 is connected to the bottom of the purification shell 1. A dust discharge port 39 is opened on one side of the purification shell 1. A guiding shell 40 is installed on one side of the purification shell 1. A dust collection box 41 is connected to the bottom of the guiding shell 40. A baffle 42 is slidably connected inside the dust discharge port 39. One side of the baffle 42 is fixedly connected with a connecting plate 43. A fixing screw 44 is arranged through the bottom of the connecting plate 43. The top of the fixing screw 44 is threadedly connected to the purification shell 1. Partition plates 45 are respectively movably connected to the surfaces of the second filter cylinder 3 and the third filter cylinder 4 through bearings.

[0036] Specifically: The bottom of the cam 21 is slidably connected to the push plate 22. The inside of the air storage tank 25 is used to store compressed gas. The piston plate 28 is slidably connected to the inner wall of the air delivery shell 24. When the piston plate 28 moves, it can compress the gas inside the air delivery shell 24. The compressed air inlet pipe 29 is used to inject external air into the air delivery shell 24. The one-way valve flap 31 can control the gas flow direction of the compressed air inlet pipe 29 and the compressed air exhaust pipe 30, so that external gas can only enter the air delivery shell 24 unidirectionally, and the gas inside the air delivery shell 24 can only enter the compressed air exhaust pipe 30 unidirectionally. The solenoid valve 34 can control the opening and closing of the pressurizing pipe 33. When the solenoid valve 34 is opened, the compressed gas can be sprayed out through the nozzle 26, and the gas is discharged from the inside of the first filter cartridge 2. The high-speed air flow generated by the compressed air impacts the filter holes of the filter cartridge, blowing off the particles and improving the cleaning effect. The first spring 35 and the second spring 36 can elastically reset the moving rod 23. The baffle 42 is used to block the dust outlet 39. After the dust accumulates on the top of the partition plate 45, the baffle 42 can be opened to clean the dust accumulated on the top of the partition plate 45. The fixing screw 44 is used to connect the connecting plate 43 and the purification shell 1, facilitating the fixation of the position of the baffle 42.

[0037] The working principle of the present invention is as follows: When external air enters the purification shell 1 through the air inlet pipe 37, it successively enters the third filter cartridge 4, the second filter cartridge 3, and the first filter cartridge 2, and is gradually filtered through the filter holes with gradually decreasing pore diameters, effectively improving the air purification effect. The filtered air is discharged through the air exhaust pipe 38 to complete the purification and filtration.

[0038] After the surface of the first filter cartridge 2 is covered with dust, the staff can stop the external air delivery, and then start the drive motor 5. The drive motor 5 drives the first filter cartridge 2 to rotate in cooperation with the transmission rod 6. While the transmission rod 6 rotates, it drives the sun gear 7 to rotate. When the sun gear 7 rotates, it drives the planetary gear 8 to rotate around the transmission rod 6 as the axis. The planetary gear 8 drives the rotating shell 15 to rotate in cooperation with the movable shaft 16. The rotating shell 15 drives the second filter cartridge 3 to rotate in cooperation with the transmission pipe 9, so that the two filter cartridges rotate at a differential speed. Larger dust particles can be separated by the centrifugal force of rotation.

[0039] While the transmission pipe 9 rotates, it drives the first bevel gear 10 to rotate. The first bevel gear 10 drives the second bevel gear 12 to rotate in cooperation with the third bevel gear 13. Through the transmission of the third bevel gear 13, the rotation direction of the second bevel gear 12 is opposite to that of the first bevel gear 10. The second bevel gear 12 drives the third filter cartridge 4 to rotate in cooperation with the support pipe 11. When the three filter cartridges rotate, the position of the cleaning brush 14 remains unchanged, and the dust adhering to the surfaces of the three filter cartridges can be cleaned by the cleaning brush 14.

[0040] While the third bevel gear 13 rotates, it drives the rotating rod 20 and the cam 21 to rotate. The cam 21 pushes the push plate 22 to move. The push plate 22 cooperates with the moving rod 23 and the connecting rod 27 to drive the three groups of cleaning brushes 14 to move up and down reciprocally, cleaning the surfaces of the three groups of filter cartridges reciprocally, which can improve the cleaning effect. The caked dust cleaned falls downward under the influence of its own weight and settles on the top of the partition plate 45 for collection.

[0041] While the moving rod 23 moves, it drives the piston plate 28 to move. When the piston plate 28 moves, it compresses the gas inside the air delivery shell 24 and discharges it unidirectionally into the gas storage tank 25 through the compressed exhaust pipe 30 for storage. Then, the solenoid valve 34 can be started to open the pressurizing pipe 33, and the compressed gas is ejected through the nozzle 26, flushing from the inside to the outside of the first filter cartridge 2. The high-speed airflow generated by the compressed air impacts the filter holes of the filter cartridge, blowing off the particles, improving the cleaning effect, enabling the filter cartridge to be reused, and at the same time improving the filtering effect.

[0042] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. Self-cleaning mechanism of a differential rotation type multi-stage air purification filter cartridge, comprising a purification shell (1), characterized in that: Inside the purification shell (1), a first filter cylinder (2) is provided. A second filter cylinder (3) is sleeved on the surface of the first filter cylinder (2), and a third filter cylinder (4) is sleeved on the surface of the second filter cylinder (3). At the top of the purification shell (1), a driving assembly is provided. The driving assembly includes a driving motor (5) arranged at the top of the purification shell (1), a transmission rod (6) installed at the output end of the driving motor (5), a sun gear (7) installed on the surface of the transmission rod (6), and a planetary gear (8) meshed with one side of the sun gear (7). The rotation speeds of the first filter cylinder (2) and the second filter cylinder (3) are adjusted through the driving assembly. At the bottom of the driving motor (5), an adjusting assembly is provided. The adjusting assembly includes a transmission pipe (9) movably connected to the surface of the transmission rod (6), a first bevel gear (10) installed on the surface of the transmission pipe (9), a support pipe (11) movably connected to the surface of the transmission pipe (9), a second bevel gear (12) installed on the surface of the support pipe (11), and a third bevel gear (13) meshed between the first bevel gear (10) and the second bevel gear (12). The rotation direction of the third filter cylinder (4) is adjusted through the adjusting assembly. Inside the purification shell (1), a cleaning assembly is provided. The cleaning assembly includes a cleaning brush (14) arranged on one side of the first filter cylinder (2), the second filter cylinder (3), and the third filter cylinder (4). The dust adhered to the surfaces of the first filter cylinder (2), the second filter cylinder (3), and the third filter cylinder (4) is cleaned through the cleaning assembly.

2. The self-cleaning mechanism of the differential rotation type multi-stage air purification filter cartridge according to claim 1, characterized in that: The driving assembly further includes a rotating shell (15) installed on the surface of the transmission pipe (9), a movable shaft (16) movably connected inside the planetary gear (8), and an internal gear ring (17) meshed with one side of the planetary gear (8). The bottom of the movable shaft (16) is fixedly connected to the inner wall of the rotating shell (15).

3. The self-cleaning mechanism of the differential rotation type multi-stage air purification filter cartridge according to claim 2, wherein: The surface of the internal gear ring (17) is fixedly connected with a mounting shell (18). The bottom of the mounting shell (18) is fixedly connected with a bottom shell (19). The bottom of the bottom shell (19) is fixedly connected to the purification shell (1). The bottom of the transmission rod (6) is fixedly connected to the first filter cylinder (2). The bottom of the transmission pipe (9) is fixedly connected to the second filter cylinder (3). The bottom of the support pipe (11) is fixedly connected to the third filter cylinder (4).

4. The self-cleaning mechanism of the differential rotation type multi-stage air purification filter cartridge according to claim 1, wherein: The cleaning assembly further includes a rotating rod (20) installed on one side of the third bevel gear (13), a cam (21) installed on the surface of the rotating rod (20), a push plate (22) slidably connected to the bottom of the cam (21), a moving rod (23) installed on the bottom of the push plate (22), an air delivery shell (24) installed at the bottom of the purification shell (1), a gas storage tank (25) installed on one side of the air delivery shell (24), and a nozzle (26) arranged inside the first filter cylinder (2).

5. The self-cleaning mechanism of the differential rotation type multi-stage air purification filter cartridge according to claim 4, characterized in that: One side of the cleaning brush (14) is fixedly connected with a connecting rod (27), one side of the connecting rod (27) is fixedly connected with a moving rod (23), a piston plate (28) is slidably connected inside the air delivery shell (24), the bottom of the moving rod (23) penetrates through the air delivery shell (24) and is fixedly connected with the piston plate (28), the bottom of the air delivery shell (24) is respectively communicated with a compressed air inlet pipe (29) and a compressed air exhaust pipe (30), one-way valve flaps (31) are installed inside both the compressed air inlet pipe (29) and the compressed air exhaust pipe (30), and the directions of the two groups of one-way valve flaps (31) are opposite.

6. The self-cleaning mechanism of the differential rotation type multi-stage air purification filter cartridge according to claim 5, characterized in that: A gas transmission pipe (32) is communicated between the compressed air exhaust pipe (30) and the gas storage tank (25), the other side of the gas storage tank (25) is communicated with a pressurizing pipe (33), the other end of the pressurizing pipe (33) penetrates into the purification shell (1) and is communicated with a spray head (26), and an electromagnetic valve (34) is sleeved on the surface of the pressurizing pipe (33).

7. The self-cleaning mechanism of the differential rotation type multi-stage air purification filter cartridge according to claim 5, characterized in that: A first spring (35) is sleeved on the surface of the moving rod (23), a second spring (36) is fixedly connected to the bottom of the piston plate (28), and one end of the first spring (35) is fixedly connected with the purification shell (1).

8. The self-cleaning mechanism of the differential rotation type multi-stage air purification filter cartridge according to claim 1, characterized in that: An air inlet pipe (37) is communicated with one side of the purification shell (1), and an air exhaust pipe (38) is communicated with the bottom of the purification shell (1).

9. The self-cleaning mechanism of the differential rotation type multi-stage air purification filter cartridge according to claim 1, characterized in that: A dust discharge port (39) is formed in one side of the purification shell (1), a guiding shell (40) is installed on one side of the purification shell (1), and a dust collection box (41) is communicated with the bottom of the guiding shell (40).

10. The self-cleaning mechanism of the differential rotation type multi-stage air purification filter cartridge according to claim 9, characterized in that: A baffle (42) is slidably connected inside the dust discharge port (39), one side of the baffle (42) is fixedly connected with a connecting plate (43), a fixing screw rod (44) is arranged through the bottom of the connecting plate (43), the top of the fixing screw rod (44) is threadedly connected with the purification shell (1), and partition plates (45) are rotatably connected to the surfaces of the second filter cartridge (3) and the third filter cartridge (4) through bearings.

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