Air filter for environmental protection

Abstract

The invention relates to the field of air filters, in particular to an air filter for environmental protection, which comprises a filter element top cover placed on a support ring arranged on the inner wall of a shell, an outer filter element and an inner filter element arranged at the top of the filter element top cover, and a plurality of ash discharge holes formed in the filter element top cover; the multiple brush rods are vertically arranged on the inner wall of the bottom of the shell, and the inner wall and the outer wall of the outer filter element and the inner wall and the outer wall of the inner filter element make contact with bristles of the brush rods; the power mechanism is arranged in the upper cover, drives the filter element top cover to rotate, controls the opening and closing of the ash discharge hole and the air outlet pipe and forms upward airflow in the shell, a filter plate is arranged in an opening in the top of the upper cover, a sealing cover is arranged on the opening, and an exhaust pipe is arranged on the sealing cover. According to the air filter, the outer filter element and the inner filter element can be fully cleaned, blockage of the outer filter element and the inner filter element cannot be aggravated, and dust or foreign matter cleaned from the outer filter element and the inner filter element is finally gathered in the upper cover and cannot be discharged into the surrounding environment.

Description

Technical Field

[0001] This invention relates to the field of air filter technology, and more particularly to an air filter for environmental protection. Background Technology

[0002] An air filter is a type of filter, also called an air cartridge, air purifier, or filter element. Air filters remove dust and sand particles from the air, providing clean air to other equipment or components.

[0003] Chinese patent CN112957831B discloses a sterilization and purification air filter, including an inner cylinder, a filter paper core, an upper end cover, a lower end cover, an outer filter cylinder, a cylindrical shell, a scraping unit, and a discharge unit. This patent addresses the problems existing in current air filters, such as: after a period of use, the filter paper becomes covered with dust particles and impurities, which clog the filter paper and reduce its air filtration efficiency; the process of replacing the air filter is cumbersome; and the current air filter has a short lifespan.

[0004] However, the above-mentioned publicly available solutions have the following shortcomings: the cleaning effect of cleaning the inner and outer surfaces of the filter element by the up-and-down moving scraper ring is poor, and the clogging of the filter element is easily aggravated by squeezing. In addition, the dust is discharged through the bottom and enters the air, which can easily re-enter the filter and pollute the surrounding environment. Summary of the Invention

[0005] The purpose of this invention is to address the problems in the prior art where the filter element has poor self-cleaning effect and the dust cleaned off enters the surrounding environment, and to propose an air filter for environmental protection.

[0006] The technical solution of the present invention: An air filter for environmental protection, comprising a housing, an air inlet pipe disposed on the housing, an air outlet pipe disposed at the bottom of the housing, and a top cover disposed on the top of the housing; further comprising: The filter element top cover is placed on the support ring set on the inner wall of the outer shell. The top of the filter element top cover is equipped with an outer filter element and an inner filter element. Multiple ash discharge holes are set on the filter element top cover. Multiple brush rods are vertically mounted on the inner wall of the bottom of the housing. The inner and outer walls of the outer filter element and the inner and outer walls of the inner filter element are in contact with the bristles of the brush rod. The power mechanism is located inside the top cover, which drives the filter element top cover to rotate, controls the opening and closing of the ash discharge hole and the air outlet pipe, and forms an upward airflow inside the outer shell. The filter plate is installed in the opening at the top of the top cover, and a sealing cover is installed on the opening. An exhaust pipe is installed on the sealing cover.

[0007] Preferably, the outer shell is barrel-shaped, with the top cover fastened to the top of the outer shell, and the top cover and the outer shell are connected by multiple snap-fits.

[0008] Preferably, multiple ash discharge holes are distributed along the circumferential direction on the inner side of the inner filter element, between the inner filter element and the outer filter element, and on the outer side of the outer filter element.

[0009] Preferably, multiple connecting rods are vertically arranged inside the top cover, and a limiting ring is provided at the bottom of the connecting rod, with the bottom of the limiting ring contacting the top of the filter element top cover.

[0010] Preferably, the power mechanism includes a rotating assembly that drives the filter element top cover to rotate, a dust discharge assembly that closes or opens the dust discharge hole, a gas outlet sealing assembly that closes or opens the gas outlet pipe, and a blower assembly that generates an upward airflow inside the housing.

[0011] Preferably, the ash discharge assembly includes a box body disposed inside the top cover, a pressure ring lifting device disposed inside the box body, and a pressure ring disposed at the bottom of the telescopic rod of the pressure ring lifting device, the pressure ring pressing against the top cover of the filter element and sealing the ash discharge hole.

[0012] Preferably, the rotating assembly includes a housing disposed within the upper cover, a lower annular gear ring disposed on the top surface of the filter element top cover, a motor disposed within the housing, and a lower gear disposed on the output shaft of the motor, the lower gear meshing with teeth on the outer circumferential surface of the lower annular gear ring.

[0013] Preferably, the blower assembly includes two cylindrical bodies vertically penetrating the top cover of the filter element, a fan blade disposed on the outer wall of the cylindrical body and located below the top cover of the filter element, an upper annular gear ring rotatably disposed on the housing, an upper gear disposed on the motor output shaft, a follower gear rotatably disposed inside the housing, and a cylindrical gear disposed on the outer wall of the cylindrical body; teeth are provided on both the inner and outer walls of the upper annular gear ring, the follower gear meshes with the upper gear and the teeth on the outer wall of the upper annular gear ring simultaneously, and the cylindrical gear meshes with the teeth on the inner wall of the upper annular gear ring.

[0014] Preferably, the vent sealing assembly includes multiple springs disposed on the inner wall of the bottom of the outer casing, an exhaust pressure plate disposed on top of the springs, a rotating ring rotatably disposed on top of the exhaust pressure plate, two connecting rods vertically disposed on the rotating ring and passing through the cylinder, a flat plate disposed on top of the connecting rods, a pressure plate lifting device disposed inside the box, and a lifting pressure plate disposed at the bottom of the telescopic end of the pressure plate lifting device, the lifting pressure plate contacting the top of the flat plate.

[0015] Compared with existing technologies, this invention has the following beneficial technical effects: By having the brush rod contact the inner and outer walls of the outer and inner filter elements, and through the rotation of the outer and inner filter elements, the invention can thoroughly clean them without exacerbating clogging. Dust or foreign objects cleaned from the outer and inner filter elements ultimately accumulate inside the top cover and are not released into the surrounding environment, thus helping to maintain a clean environment. Cleaning the dust inside the top cover is also simple; just remove the top cover. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention; Figure 2 for Figure 1 Exploded view; Figure 3 This is a schematic diagram of the internal structure of the outer shell; Figure 4 This is a schematic diagram of the structure of the outer and inner filter elements; Figure 5 This is a schematic diagram of the internal structure of the box; Figure 6 for Figure 5 A schematic diagram of the structure after removing the outer and inner filter elements.

[0017] Reference numerals: 1. Outer shell; 2. Inlet pipe; 3. Outlet pipe; 4. Connecting flange; 5. Outer filter element; 6. Inner filter element; 7. Filter element top cover; 8. Support ring; 9. Top cover; 10. Sealing cover; 11. Exhaust pipe; 12. Filter plate; 13. Buckle; 14. Connecting rod; 15. Limiting ring; 16. Bearing; 17. Brush rod; 18. Ash discharge hole; 19. Spring; 20. Exhaust pressure plate; 21. Rotating ring; 22. Connecting rod; 23. Flat plate; 24. Lifting pressure plate; 25. Pressure plate lifting device; 26. Cylinder; 27. Fan blade; 28. Pressure ring; 29. ​​Pressure ring lifting device; 30. Lower annular gear ring; 31. Motor; 32. Lower gear; 33. Upper gear; 34. Follower gear; 35. Upper annular gear ring; 36. Cylinder gear; 37. Box body; 38. Annular guide rail. Detailed Implementation

[0018] Example 1, as Figures 1-4 As shown, the present invention proposes an air filter for environmental protection, comprising a housing 1, an inlet pipe 2 disposed on the housing 1, an outlet pipe 3 disposed at the bottom of the housing 1, and a top cover 9 disposed on the top of the housing 1. The housing 1 is barrel-shaped, and the top cover 9 is fastened to the top of the housing 1. The top cover 9 and the housing 1 are connected by multiple snap fasteners 13. To facilitate connection of the outlet pipe 3 to other air-using equipment, a connecting flange 4 is provided at the end of the outlet pipe 3. The inlet pipe 2 is located at the head position on the periphery of the housing 1, and the diameter of the inlet pipe 2 is smaller than the diameter of the outlet pipe 3; it also includes: The filter element top cover 7 is placed on the support ring 8 set on the inner wall of the outer shell 1. Multiple connecting rods 14 are vertically arranged inside the top cover 9. A limiting ring 15 is set at the bottom of the connecting rod 14. The bottom of the limiting ring 15 contacts the top of the filter element top cover 7. In order to reduce the rotational resistance of the filter element top cover 7, a bearing 16 is set on the outer peripheral wall of the filter element top cover 7. The outer wall of the bearing 16 contacts the inner peripheral wall of the outer shell 1. Multiple balls are set along the circumferential direction at the bottom of the limiting ring 15 and the top of the support ring 8. The balls roll in contact with the filter element top cover 7. An outer filter element 5 and an inner filter element 6 are set on the top of the filter element top cover 7. Multiple ash discharge holes 18 are set on the filter element top cover 7. Multiple ash discharge holes 18 are distributed along the circumferential direction on the inner side of the inner filter element 6, between the inner filter element 6 and the outer filter element 5, and on the outer side of the outer filter element 5. Multiple brush rods 17 are vertically arranged on the inner wall of the bottom of the outer casing 1. The inner and outer walls of the outer filter element 5 and the inner and outer walls of the inner filter element 6 are in contact with the bristles of the brush rods 17. In this embodiment, three brush rods 17 are provided. The three brush rods 17 are located on the inner side of the inner filter element 6, between the inner filter element 6 and the outer filter element 5, and on the outer side of the outer filter element 5, respectively. It should be noted that the bristles on the brush rod 17 located between the inner filter element 6 and the outer filter element 5 are in contact with both the outer wall of the inner filter element 6 and the inner wall of the outer filter element 5. The power mechanism is located inside the top cover 9, which drives the filter element top cover 7 to rotate, controls the opening and closing of the ash discharge hole 18 and the air outlet pipe 3, and forms an upward airflow inside the outer shell 1. The top opening of the top cover 9 is equipped with a filter plate 12, and a sealing cover 10 is provided on the opening. An exhaust pipe 11 is provided on the sealing cover 10. During self-cleaning, the power structure drives the outer filter element 5 and the inner filter element 6 to rotate. During rotation, the outer filter element 5 and the inner filter element 6 come into full contact with the bristles on the brush rod 17. The bristles can insert into the gaps between the outer filter element 5 and the inner filter element 6, which can thoroughly clean the outer filter element 5 and the inner filter element 6 without aggravating the clogging of the outer filter element 5 and the inner filter element 6. The dust discharged from the outer filter element 5 and the inner filter element 6 enters the upper cover 9 through the dust discharge hole 18 under the rising airflow and is blocked by the filter plate 12. The upward airflow is discharged through the exhaust pipe 11, ensuring that dust will not be discharged into the surrounding environment in the self-cleaning state, and the exhaust pipe 3 does not exhaust outward, thereby preventing dust from entering other equipment.

[0019] Example 2, as Figures 3-6 As shown, this invention proposes an air filter for environmental protection. Compared with Embodiment 1, this embodiment details the structure of the ash removal component and the rotating component.

[0020] The power mechanism includes a rotating assembly that drives the filter element top cover 7 to rotate, a dust discharge assembly that closes or opens the dust discharge hole 18, a gas outlet sealing assembly that closes or opens the gas outlet pipe 3, and a blower assembly that generates an upward airflow inside the housing 1.

[0021] The ash discharge assembly includes a housing 37 housed inside the top cover 9, a pressure ring lifting device 29 housed inside the housing 37, and a pressure ring 28 located at the bottom of the telescopic rod of the pressure ring lifting device 29. The pressure ring 28 presses against the filter element top cover 7 and seals the ash discharge hole 18. The pressure ring lifting device 29 is an electric push rod. The telescopic rod of the pressure ring lifting device 29 passes through the bottom of the housing 37. A sliding seal, such as a sealing ring, is provided between the telescopic rod and the housing 37 to prevent ash from entering the housing 37. For easy maintenance, the housing 37 is provided with an openable maintenance cover with two handles. When self-cleaning is required, the pressure ring lifting device 29 moves the pressure ring 28 upward slightly, allowing the upward airflow to pass through the ash discharge hole 18.

[0022] The rotating assembly includes a housing 37 disposed within the upper cover 9, a lower annular gear ring 30 disposed on the top surface of the filter element top cover 7, a motor 31 disposed within the housing 37, and a lower gear 32 disposed on the output shaft of the motor 31, the lower gear 32 meshing with the teeth on the outer circumferential surface of the lower annular gear ring 30.

[0023] Example 3, as Figures 5-6 As shown, this invention proposes an air filter for environmental protection. Compared with Embodiment 2, this embodiment details the structure of the blower assembly and the air outlet sealing assembly.

[0024] The blower assembly includes two cylindrical bodies 26 vertically mounted on the top cover 7 of the filter element, fan blades 27 mounted on the outer wall of the cylindrical bodies 26 and located below the top cover 7 of the filter element, an upper annular gear ring 35 rotatably mounted on a housing 37, an upper gear 33 mounted on the output shaft of the motor 31, a follower gear 34 rotatably mounted inside the housing 37, and a cylindrical gear 36 mounted on the outer wall of the cylindrical bodies 26; the upper annular gear ring 35 has teeth on both its inner and outer walls, and the follower gear 34 simultaneously meshes with the upper gear 33. The teeth on the outer wall of the upper annular gear ring 35 mesh with the teeth on the inner wall of the cylindrical gear ring 36; an annular guide rail 38 is provided on the box body 37, and an annular plate that cooperates with the annular guide rail 38 is provided on the outer wall of the upper annular gear ring 35; during the rotation of the filter element top cover 7, the upper annular gear ring 35 rotates in the opposite direction, and the rotation of the cylinder 26 is accelerated by the meshing of the upper annular gear ring 35 and the cylindrical gear ring 36, and then the fan blades 27 blow air upward to form an upward airflow.

[0025] The vent sealing assembly includes multiple springs 19 mounted on the inner wall of the bottom of the outer casing 1, an exhaust pressure plate 20 mounted on top of the springs 19, a rotating ring 21 rotatably mounted on top of the exhaust pressure plate 20, two connecting rods 22 vertically mounted on the rotating ring 21 and passing through the cylinder 26, a flat plate 23 mounted on top of the connecting rods 22, a pressure plate lifting device 25 mounted inside the housing 37, and a lifting pressure plate 24 mounted at the bottom of the telescopic end of the pressure plate lifting device 25, with the lifting pressure plate 24 in contact with the top of the flat plate 23. To reduce rotational resistance, multiple ball bearings are mounted on the top of the flat plate 23, and the ball bearings roll in contact with the bottom of the lifting pressure plate 24. The pressure plate lifting device 25 is an electric push rod. During self-cleaning, the pressure plate lifting device 25 drives the lifting pressure plate 24 to move downward, and then pushes the exhaust pressure plate 20 downward through the flat plate 23, connecting rods 22, and rotating ring 21 to press the top of the vent pipe 3 to complete the seal of the vent pipe 3.

[0026] In addition, a control system is installed inside the housing 37. The control system is connected to the pressure ring lifting device 29, the pressure plate lifting device 25, and the motor 31. A conduit is installed on the top cover 9. The conduit is sealed after wiring to prevent air leakage. The control system is wirelessly connected to a remote terminal. The self-cleaning time interval is set through the control system.

[0027] In summary, when the present invention is in use, the gas enters the outer casing 1 from the inlet pipe 2, passes through the outer filter element 5 and the inner filter element 6 in sequence, and is discharged from the outlet pipe 3. The filter holes of the outer filter element 5 are larger than those of the inner filter element 6. After a period of use, dust or foreign objects will accumulate on the inner and outer walls of both the outer filter element 5 and the inner filter element 6. Self-cleaning can be performed periodically or remotely. During self-cleaning, the pressure plate lifting device 25 first extends downward and seals the top of the exhaust pipe 3 through the exhaust pressure plate 20, preventing it from venting downward. Then, the pressure ring lifting device 29 retracts upward, causing the pressure ring 28 to move upward and expose the dust discharge hole 18. Next, the motor 31 starts and drives the outer filter element 5 and the inner filter element 6 to rotate through the filter element top cover 7. During the rotation of the outer filter element 5 and the inner filter element 6, they come into contact with the brush on the brush rod 17 to remove dust. At the same time, the rotation of the fan blade 27 generates an upward airflow. The dust that has been removed passes through the dust discharge hole 18 and is blocked by the filter plate 12. Finally, the dust or foreign objects removed from the outer filter element 5 and the inner filter element 6 accumulate in the top cover 9. After a long period of use, the top cover 9 can be removed for dust cleaning.

[0028] In this invention, the brush rod 17 contacts the inner and outer walls of the outer filter element 5 and the inner filter element 6. The rotation of the outer and inner filter elements 5 and 6 effectively cleans them without exacerbating clogging. Dust or foreign objects cleaned from the outer and inner filter elements 5 and 6 ultimately accumulate inside the upper cover 9 and are not released into the surrounding environment, thus helping to maintain a clean environment. Cleaning the dust inside the upper cover 9 is also simple; just remove the upper cover 9.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. An air filter for environmental protection, comprising a housing (1), an air inlet pipe (2) disposed on the housing (1), an air outlet pipe (3) disposed at the bottom of the housing (1), and a top cover (9) disposed at the top of the housing (1); characterized in that, Also includes: The filter element top cover (7) is placed on the support ring (8) set on the inner wall of the outer shell (1). The top of the filter element top cover (7) is provided with an outer filter element (5) and an inner filter element (6). Multiple ash discharge holes (18) are provided on the filter element top cover (7). The brush rod (17) is vertically set on the inner wall of the bottom of the outer casing (1) and multiple of them are set. The inner and outer walls of the outer filter element (5) and the inner and outer walls of the inner filter element (6) are in contact with the bristles of the brush rod (17). The power mechanism is located inside the top cover (9) to drive the filter element top cover (7) to rotate, control the opening and closing of the ash discharge hole (18) and the air outlet pipe (3), and form an upward airflow inside the outer shell (1). The filter plate (12) is installed in the top opening of the top cover (9), and the sealing cover (10) is installed on the opening. The exhaust pipe (11) is installed on the sealing cover (10).

2. The air filter for environmental protection according to claim 1, characterized in that, The outer shell (1) is barrel-shaped, and the top cover (9) is fastened to the top of the outer shell (1). The top cover (9) and the outer shell (1) are connected by multiple buckles (13).

3. The air filter for environmental protection according to claim 1, characterized in that, Multiple ash discharge holes (18) are distributed along the circumferential direction on the inner side of the inner filter element (6), between the inner filter element (6) and the outer filter element (5), and on the outer side of the outer filter element (5).

4. The air filter for environmental protection according to claim 1, characterized in that, Multiple connecting rods (14) are vertically arranged inside the top cover (9). A limiting ring (15) is set at the bottom of the connecting rod (14). The bottom of the limiting ring (15) contacts the top of the filter element top cover (7).

5. The air filter for environmental protection according to claim 1, characterized in that, The power mechanism includes a rotating assembly that drives the filter element top cover (7) to rotate, a dust discharge assembly that closes or opens the dust discharge hole (18), an air outlet sealing assembly that closes or opens the air outlet pipe (3), and a blower assembly that generates an upward airflow inside the housing (1).

6. The air filter for environmental protection according to claim 5, characterized in that, The ash discharge assembly includes a box (37) set inside the top cover (9), a pressure ring lifting device (29) set inside the box (37), and a pressure ring (28) set at the bottom of the telescopic rod of the pressure ring lifting device (29). The pressure ring (28) presses on the filter element top cover (7) and closes the ash discharge hole (18).

7. The air filter for environmental protection according to claim 5, characterized in that, The rotating assembly includes a housing (37) disposed inside the upper cover (9), a lower annular gear ring (30) disposed on the top surface of the filter element top cover (7), a motor (31) disposed inside the housing (37), and a lower gear (32) disposed on the output shaft of the motor (31), the lower gear (32) meshing with the teeth on the outer circumferential surface of the lower annular gear ring (30).

8. The air filter for environmental protection according to claim 7, characterized in that, The blower assembly includes two cylindrical bodies (26) vertically mounted on the filter element top cover (7), a fan blade (27) mounted on the outer wall of the cylindrical body (26) and located below the filter element top cover (7), an upper annular gear ring (35) rotatably mounted on the box body (37), an upper gear (33) mounted on the output shaft of the motor (31), a follower gear (34) rotatably mounted inside the box body (37), and a cylindrical gear (36) mounted on the outer wall of the cylindrical body (26). Teeth are provided on both the inner and outer walls of the upper annular gear ring (35), the follower gear (34) meshes with the upper gear (33) and the teeth on the outer wall of the upper annular gear ring (35) at the same time, and the cylindrical gear (36) meshes with the teeth on the inner wall of the upper annular gear ring (35).

9. The air filter for environmental protection according to claim 8, characterized in that, The vent sealing assembly includes multiple springs (19) disposed on the inner wall of the bottom of the outer shell (1), an exhaust pressure plate (20) disposed on the top of the springs (19), a rotating ring (21) rotatably disposed on the top of the exhaust pressure plate (20), two connecting rods (22) vertically disposed on the rotating ring (21) and passing through the cylinder (26), a flat plate (23) disposed on the top of the connecting rods (22), a pressure plate lifting device (25) disposed in the box body (37), and a lifting pressure plate (24) disposed at the bottom of the telescopic end of the pressure plate lifting device (25), the lifting pressure plate (24) contacting the top of the flat plate (23).

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