Self-cleaning filter device

Abstract

This utility model belongs to the technical field of tobacco production equipment and discloses a self-cleaning filter device. The self-cleaning filter device includes a flange, a filter assembly, a drive assembly, and a cleaning assembly. The flange is fixed to one end of the hot air duct with an air inlet. The filter assembly includes a screen cylinder and a support assembly. The support assembly is fixed to the flange, and the screen cylinder is rotatably connected to the support assembly. The output end of the drive assembly is drively connected to the screen cylinder. The cleaning assembly includes a first scraper, which is arranged on the support assembly along the axial direction of the screen cylinder. The first scraper is used to clean the outer peripheral wall of the screen cylinder when the drive assembly drives the screen cylinder to rotate, removing tobacco debris attached to the outer peripheral wall of the screen cylinder, avoiding blockage and reduced air intake efficiency, reducing the labor intensity of operators, improving the convenience of equipment maintenance and operational reliability, and ensuring the continuity of production and the stability of product quality.

Description

Technical Field

[0001] This utility model relates to the field of tobacco production equipment technology, and in particular to a self-cleaning filter device. Background Technology

[0002] The HBD feeder is one of the pieces of equipment in the tobacco production process. The primary feeding hot air duct system, as a core component of the HBD feeder, plays a crucial role in tobacco processing. Under normal operating conditions, the circulating fan in the primary feeding hot air duct system circulates through the hot air duct, forming a stable hot airflow. This ensures that the inside of the drum reaches the required temperature, providing a suitable temperature environment for moisture to fully penetrate the tobacco leaf tissue, thereby guaranteeing the quality of tobacco processing.

[0003] However, during the operation of the HBD feeder, the circulating medium inevitably carries a small amount of tobacco debris into the hot air duct. Some of this debris adheres to the duct walls, butterfly valves, and fan impellers, gradually accumulating over time to form soot. When adjusting the butterfly valve opening, the resistance from the soot makes it difficult to rotate the valve, easily leading to excessive stress on the valve adjustment mechanism, causing deformation or damage to the connecting rod. Secondly, during operation, the accumulated soot may fall off at any time, impacting the high-speed rotating fan impeller, causing damage and impeller imbalance. An unbalanced impeller not only accelerates the wear of core components such as the circulating fan but also increases the operating burden on the frequency converter, reducing the overall stability and service life of the equipment. In addition, because the circulating air duct is usually located at a high position with limited working space, manual cleaning and maintenance are difficult, increasing the complexity and cost of equipment maintenance. Utility Model Content

[0004] The purpose of this invention is to provide a self-cleaning filter device to avoid blockage of hot air ducts and reduced air intake efficiency, reduce the labor intensity of operators, and improve the convenience of equipment maintenance and operational reliability.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A self-cleaning filter device, installed at the air inlet of the hot air duct of the HBD feeder, includes:

[0007] A flange is fixed to the end of the hot air duct where the air inlet is located;

[0008] A filter assembly includes a screen cylinder and a support assembly, wherein the support assembly is fixed to the flange and the screen cylinder is rotatably connected to the support assembly;

[0009] A drive assembly, the output end of which is connected to the screen cylinder via a transmission connection;

[0010] The cleaning component includes a first scraper, which is disposed on the support assembly along the axial direction of the screen cylinder. The first scraper is used to clean the outer peripheral wall of the screen cylinder when the drive assembly drives the screen cylinder to rotate.

[0011] Optionally, the support assembly includes:

[0012] The first mounting bracket includes an annular component and a support component, the annular component being fastened to the flange, and the support component being fixed to the inner side of the annular component;

[0013] The second mounting bracket includes a first rod and a second rod, wherein the first rod is disposed opposite to the annular member, and both ends of the first rod are respectively connected to the annular member through a second rod;

[0014] The two ends of the screen cylinder are rotatably connected to the first rod and the support member, respectively, and each of the second rods is provided with the first scraper.

[0015] Optionally, the filter assembly further includes a rotating shaft that passes through the screen cylinder and is coaxially fixed with the screen cylinder, and the two ends of the rotating shaft are rotatably connected to the first rod and the support member, respectively.

[0016] Optionally, the first rod is provided with a first rotating seat, and the first rotating seat is provided with a first bearing. The support is provided with a second rotating seat, and the second rotating seat is provided with a second bearing. The two ends of the rotating shaft are rotatably connected to the first rotating seat and the second rotating seat respectively through the first bearing and the second bearing.

[0017] Optionally, the bracket assembly further includes a gasket sandwiched between the flange and the annular member.

[0018] Optionally, the first scraper includes:

[0019] Mounting plate, fixed to the second rod;

[0020] The connecting plate and the first cutter head are provided. One end of the connecting plate is connected to the mounting plate, and the other end is connected to the first cutter head. The first cutter head can slide in contact with the outer wall of the screen cylinder.

[0021] Optionally, the screen cylinder includes:

[0022] The cylinder has a hollow cylindrical structure with openings at both ends, and a number of first vent holes are provided on the peripheral wall of the cylinder.

[0023] A first plate is disposed at the first end of the cylinder and fixed to the rotating shaft, and the first plate is provided with a plurality of first ventilation holes.

[0024] The second plate is disposed at the second end of the cylinder and fixed to the rotating shaft. The second plate is provided with a plurality of second vent holes; wherein the diameter of the second vent holes is larger than the diameter of the first vent holes.

[0025] Optionally, the driving component includes:

[0026] A fixing seat is disposed on the bracket assembly;

[0027] A driving component is disposed on the fixed base, and the output end of the driving component is connected to the rotating shaft for transmission.

[0028] Optionally, the drive assembly further includes a protective cover, the drive component is located inside the hot air duct, and the protective cover covers the drive component and is sealed to the fixed base.

[0029] Optionally, the cleaning assembly further includes a second scraper, which is radially disposed on the support assembly along the screen cylinder. The second scraper is capable of cleaning the end face of the screen cylinder away from the flange when the drive assembly drives the screen cylinder to rotate.

[0030] Beneficial effects:

[0031] The self-cleaning filter device provided by this utility model is installed at one end of the hot air duct of the HBD feeder. It can filter tobacco debris, preventing it from entering the hot air duct of the HBD feeder and avoiding the deposition of tobacco residue on the pipe wall, butterfly valve, and fan impeller, effectively extending the service life of the internal components of the hot air duct. Furthermore, when the drive assembly drives the screen cylinder to rotate, the first scraper slides in contact with the outer peripheral wall, cleaning the outer peripheral wall of the screen cylinder and removing tobacco debris adhering to it. This prevents blockage of the hot air duct and reduction in air intake efficiency, reduces the labor intensity of operators, improves the convenience of equipment maintenance and operational reliability, and ensures the continuity of production and the stability of product quality. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the self-cleaning filter device provided by this utility model;

[0033] Figure 2 This is an exploded view of the self-cleaning filter device provided by this utility model;

[0034] Figure 3 This is a structural schematic diagram of the bracket assembly provided by this utility model;

[0035] Figure 4 This is a schematic diagram of the structure of the first scraper provided by this utility model from a first perspective;

[0036] Figure 5This is a schematic diagram of the structure of the first scraper provided by this utility model from a second perspective;

[0037] Figure 6 This is a schematic diagram of the structure of the screen cylinder provided by this utility model;

[0038] Figure 7 This is an exploded view of the drive component provided by this utility model.

[0039] In the picture:

[0040] 100. Flange;

[0041] 210. Screen cylinder; 211. Cylinder body; 2111. First vent hole; 212. First plate; 213. Second plate; 2131. Second vent hole; 220. Support assembly; 221. First mounting bracket; 2211. Annular component; 2212. Support component; 222. Second mounting bracket; 2221. First rod; 22211. First rotating seat; 2222. Second rod; 223. Rotating shaft; 224. Gasket;

[0042] 300. Drive assembly; 310. Mounting bracket; 320. Drive component; 330. Protective cover;

[0043] 410. First scraper; 411. Mounting plate; 412. Connecting plate; 413. First cutter head; 420. Second scraper;

[0044] 510, First fastener; 520, Second fastener; 530, Fourth fastener; 540, Fifth fastener. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0046] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0049] This embodiment provides a self-cleaning filter device, installed at the air inlet of the hot air duct of the HBD feeder, characterized in that, as Figure 1 As shown, the self-cleaning filter device includes a flange 100, a filter assembly, a drive assembly 300, and a cleaning assembly. The flange 100 is fixed to one end of the hot air duct with an air inlet. The filter assembly includes a screen cylinder 210 and a support assembly 220. The support assembly 220 is fixed to the flange 100, and the screen cylinder 210 is rotatably connected to the support assembly 220. The output end of the drive assembly 300 is drively connected to the screen cylinder 210. The drive assembly 300 is used to drive the screen cylinder 210 to rotate around its own axis. The cleaning assembly includes a first scraper 410, which is arranged on the support assembly 220 along the axial direction of the screen cylinder 210. The first scraper 410 is used to clean the outer peripheral wall of the screen cylinder 210 when the drive assembly 300 drives the screen cylinder 210 to rotate, removing tobacco debris attached to the outer peripheral wall of the screen cylinder 210, avoiding blockage and reduced air intake efficiency, reducing the labor intensity of operators, improving the convenience of equipment maintenance and operational reliability, and ensuring the continuity of production and the stability of product quality. Furthermore, the self-cleaning filter device is installed at one end of the hot air duct of the HBD feeder, which can filter tobacco debris and prevent tobacco debris from entering the hot air duct of the HBD feeder, thus avoiding the deposition of soot on the pipe wall, butterfly valve and fan impeller, and effectively extending the service life of the internal components of the hot air duct.

[0050] Optionally, such as Figures 2-3As shown, the bracket assembly 220 includes a first mounting bracket 221 and a second mounting bracket 222. The first mounting bracket 221 includes an annular member 2211 and a support member 2212. The annular member 2211 is fastened to the flange 100, and the support member 2212 is fixed to the inner side of the annular member 2211. The second mounting bracket 222 includes a first rod 2221 and a second rod 2222. The first rod 2221 is arranged opposite to the annular member 2211, and both ends of the first rod 2221 are respectively connected to the annular member 2211 through a second rod 2222. Both ends of the screen cylinder 210 are rotatably connected to the first rod 2221 and the support member 2212 respectively, and each second rod 2222 is provided with a first scraper 410. During the rotation of the screen cylinder 210, the first scraper 410 installed on the second rod 2222 can stably and continuously form sliding contact with the outer peripheral wall of the screen cylinder 210, thereby effectively cleaning it, ensuring the permeability of the screen, preventing the accumulation of tobacco debris and causing blockage, and further improving the self-cleaning ability and operational reliability of the filtration device.

[0051] Optionally, the first member 2221 and the second member 2222 are constructed as an integrally formed structure, which can improve the connection strength between the first member 2221 and the second member 2222, simplify the processing technology, and improve processing efficiency. In other embodiments, the first member 2221 and the second member 2222 can be welded together.

[0052] Optionally, the filter assembly also includes a rotating shaft 223, which passes through the screen cylinder 210 and is fixed coaxially with the screen cylinder 210. The two ends of the rotating shaft 223 are rotatably connected to the first rod 2221 and the support member 2212, respectively, thereby providing stable rotational support for the screen cylinder 210. This design ensures that the screen cylinder 210 can rotate smoothly around its own axis under the action of the drive assembly 300, reducing vibration and eccentricity problems and improving operational reliability.

[0053] Optionally, the first rod 2221 is provided with a first rotating seat 22211, the first rotating seat 22211 is provided with a first bearing, the support member 2212 is provided with a second rotating seat, the second rotating seat is provided with a second bearing, and the two ends of the rotating shaft 223 are rotatably connected to the first rotating seat 22211 and the second rotating seat respectively through the first bearing and the second bearing, which greatly reduces the frictional resistance when the rotating shaft 223 rotates, so that the screen cylinder 210 can achieve stable and efficient rotation with lower energy consumption under the action of the drive component 300, thereby improving the operating efficiency.

[0054] Optionally, such as Figure 2As shown, the support assembly 220 also includes a gasket 224, which is sandwiched between the flange 100 and the annular member 2211. The gasket 224 fills the gap between the flange 100 and the annular member 2211, effectively preventing tobacco debris, dust, moisture, or other external pollutants from entering the hot air duct through the connection, ensuring the cleanliness of the inside of the hot air duct, and reducing the possibility of soot deposition.

[0055] Optionally, the gasket 224 can be a metal gasket 224 or a rubber gasket 224. The rubber gasket 224 can absorb the vibration generated during the operation of the equipment, especially the mechanical vibration generated when the screen cylinder 210 rotates and the drive assembly 300 works, thereby reducing operating noise and improving the working environment.

[0056] Optionally, the flange 100 is welded to the end of the hot air duct. The flange 100, gasket 224, and first mounting bracket 221 are fastened together by the first fastener 510, which facilitates the installation of the self-cleaning filter device at the end of the hot air duct with an air inlet, improving installation efficiency. Specifically, the first fastener 510 is a first screw. Four first screws are welded onto the flange 100, and the four first screws are evenly distributed around the circumference of the flange 100. The annular part 2211 of the first mounting bracket 221 is provided with four first through holes. Each first screw passes through a corresponding first through hole and is threaded to a first nut, thereby fastening the first mounting bracket 221 to the flange 100.

[0057] Optionally, such as Figures 4-5 As shown, the first scraper 410 includes a mounting plate 411, a connecting plate 412, and a first cutter head 413. The mounting plate 411 is fixed to the second rod 2222. One end of the connecting plate 412 is connected to the mounting plate 411, and the other end is connected to the first cutter head 413. The first cutter head 413 can slide in contact with the outer wall of the screen cylinder 210, achieving a highly efficient and continuous cleaning effect, and significantly improving the filtration efficiency, operational reliability, and maintenance convenience of the self-cleaning filter device.

[0058] Optionally, the mounting plate 411 is fastened to the second rod 2222 by the second fastener 520, which can ensure the stability of the connection between the first scraper 410 and the second rod 2222, and facilitate the disassembly and assembly of the second fastener 520.

[0059] Optionally, the mounting plate 411 has a slotted hole, and the second rod 2222 has a threaded hole. The slotted hole can be aligned with the threaded hole. The second fastener 520 is a second screw, which passes through the slotted hole and the threaded hole in sequence and is threadedly connected to the second rod 2222. By setting the slotted hole, the distance between the first cutter head 413 and the screen cylinder 210 can be adjusted to avoid the distance being too large or too small, thus ensuring the cleaning effect of the first cutter head 413.

[0060] Optionally, such as Figure 5 As shown, the mounting plate 411 and the connecting plate 412 form a preset angle α, which can ensure the cleaning effect of the first cutter head 413. The preset angle α is greater than 0° and less than or equal to 180°, and can be 30°, 60°, 90°, 120°, 150°, etc.

[0061] In this embodiment, as Figure 5 As shown, the preset included angle α between the mounting plate 411 and the connecting plate 412 is 105°. The first blade 413 of the first scraper 410 is tilted 15° further on this angle, that is, the included angle β between the extension line of the first scraper 410 and the connecting plate 412 is 15°. The first scraper 410 and the screen cylinder 210 maintain a gap of 0mm-2mm, so that the first blade 413 can smoothly scrape off the tobacco leaves and maintain sufficient strength. Optionally, the distance between the first scraper 410 and the screen cylinder 210 can be 0mm, 0.5mm, 1mm, 1.5mm, 2mm, etc. The value of the included angle β between the first scraper 410 and the extension line of the connecting plate 412 can be set according to actual cleaning needs. For example, the included angle β can be 15°-60°, specifically 15°, 30°, 45°, 60°, etc.

[0062] Optionally, such as Figure 6 As shown, the screen cylinder 210 includes a cylinder body 211, a first plate 212, and a second plate 213. The cylinder body 211 is a hollow cylindrical structure with openings at both ends. A plurality of first ventilation holes 2111 are provided on the peripheral wall of the cylinder body 211. The first plate 212 is located at the first end of the cylinder body 211 and is fixed to the rotating shaft 223. A plurality of first ventilation holes 2111 are provided on the first plate 212. The second plate 213 is located at the second end of the cylinder body 211 and is fixed to the rotating shaft 223. A plurality of second ventilation holes 2131 are provided on the second plate 213. The diameter of the second ventilation holes 2131 is larger than the diameter of the first ventilation holes 2111. The outer peripheral wall of the screen cylinder 210 and the first ventilation holes 2111 on the first plate 212 form a filter layer, which effectively blocks smaller tobacco leaf debris. The second plate 213 has a larger aperture, which helps to reduce the end wind resistance, enhance airflow permeability, thereby optimizing the airflow path and improving the filtration efficiency and overall operating performance of the equipment.

[0063] Optionally, the screen cylinder 210 can be made of 304 stainless steel, which ensures the structural strength of the screen cylinder 210. At the same time, this material is corrosion resistant and can improve the service life of the screen cylinder 210. Specifically, the screen cylinder 210 is cylindrical in shape, with a wall thickness of 2mm. The circumferential surface of the cylinder 211 has a 10mm first vent hole 2111. The distance between the two first vent holes 2111 along the axial direction of the cylinder 211 is 14mm, and the distance between the two first vent holes 2111 along the circumferential direction of the cylinder 211 is 12mm, which is distributed across the entire surface of the cylinder 211.

[0064] Optionally, the first plate 212 is welded to the cylinder 211, and the second plate 213 is detachably connected to the cylinder 211. The first plate 212 is connected by welding, which helps to improve the connection strength between the screen cylinder 210 and the first plate 212. The second plate 213 is detachably connected, which facilitates disassembly and maintenance, and makes it easy to clean internal residual impurities or replace damaged parts, thereby improving the maintainability and ease of use of the device.

[0065] Optionally, the second plate 213 can be fastened to the cylinder 211 by a third fastener, which can be a third screw, to ensure the stability and reliability of the connection between the second plate 213 and the cylinder 211. In other embodiments, the second plate 213 can be fastened to the cylinder 211 by a snap-fit ​​mechanism.

[0066] Optionally, such as Figure 7 As shown, the drive assembly 300 includes a fixed base 310 and a drive member 320. The fixed base 310 is disposed on the support member 2212 of the first mounting frame 221, and the drive member 320 is disposed on the fixed base 310. The output end of the drive member 320 is connected to the rotating shaft 223 for transmission. The drive assembly 300 can drive the rotating shaft 223 to rotate, thereby driving the screen cylinder 210 to rotate. In this embodiment, the drive member 320 is disposed on the side of the first mounting frame 221 away from the screen cylinder 210, so that the drive member 320 is located inside the hot air duct, which can make reasonable use of space and improve the compactness of the self-cleaning filter device.

[0067] Optionally, the drive assembly 300 also includes a protective cover 330. The drive component 320 is located inside the hot air duct, and the protective cover 330 covers the drive component 320 and is sealed to the mounting base 310. The protective cover 330 can effectively isolate the high-temperature airflow inside the hot air duct to prevent it from corroding or damaging the drive component 320, thereby extending the service life of the drive component 320.

[0068] Optionally, the protective cover 330 is generally cup-shaped, with a bent plate at the rim. A through hole is opened on the bent plate, and a fourth fastener 530 is inserted through this hole to fix the protective cover 330 to the support member 2212 of the first mounting bracket 221. In this embodiment, the drive member 320 is a pneumatic geared motor. The protective cover 330 has two clearance holes for an air inlet pipe and an air outlet pipe, respectively. Both the air inlet and outlet pipes are connected to the air inlet and outlet ports of the pneumatic geared motor, providing power to the motor. In this embodiment, the fourth fastener 530 can be a fourth screw. This fourth screw ensures the stability of the connection between the protective cover 330 and the first mounting bracket 221, improving the protection effect on the pneumatic geared motor.

[0069] Optionally, the pneumatic geared motor can be controlled by a PLC controller. Depending on production needs, the pneumatic geared motor can run for 5 seconds and then stop for 90 seconds during the production of the same batch of tobacco leaves. The selected motor type is a pneumatic blade type, model NK-4VA1:15. This model of pneumatic geared motor features variable speed, explosion-proof design, no sparks, no static electricity, no heat generation during operation, no burnout, and can rotate in both directions. It should be noted that the connection circuit and control program between the PLC controller and the pneumatic geared motor are standard techniques in this field and will not be elaborated upon here.

[0070] Optionally, the cleaning assembly also includes a second scraper 420, which is radially disposed on the support assembly 220 along the screen cylinder 210. The second scraper 420 can scrape and clean the end face of the screen cylinder 210 away from the flange 100 during the rotation of the screen cylinder 210, effectively removing tobacco debris or dust attached to the end face, further improving the overall self-cleaning capability of the filter device, preventing the rotational stability or filtration effect from being affected by the accumulation of impurities on the end face, thereby improving the reliability of the device operation and the efficiency of cleaning and maintenance.

[0071] Optionally, the second scraper 420 includes a blade body and a second blade head. The blade body is fastened to the first rod 2221 of the second mounting bracket 222 by a fifth fastener 540. The distance between the second blade head and the end face of its corresponding screen cylinder 210 is 0mm-2mm, specifically 0mm, 0.5mm, 1mm, 1.5mm, 2mm, etc. Maintaining a small gap between the second blade head and the end face of the screen cylinder 210 allows for efficient scraping of end face residue without interfering with rotation.

[0072] In this embodiment, the fifth fastener 540 is the fifth screw, which can ensure that the connection between the second scraper 420 and the first rod 2221 is more stable and reliable.

[0073] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A self-cleaning filter device, installed at the air inlet of the hot air duct of the HBD feeder, characterized in that, include: A flange (100) is fixed to the end of the hot air duct where the air inlet is located; The filter assembly includes a screen cylinder (210) and a support assembly (220), the support assembly (220) being fixed to the flange (100), and the screen cylinder (210) being rotatably connected to the support assembly (220); A drive assembly (300) is provided, the output end of which is connected to the screen cylinder (210) in a transmission manner. The cleaning component includes a first scraper (410) which is disposed on the support assembly (220) along the axial direction of the screen cylinder (210). The first scraper (410) is used to clean the outer peripheral wall of the screen cylinder (210) when the drive assembly (300) drives the screen cylinder (210) to rotate.

2. The self-cleaning filter device according to claim 1, characterized in that, The support assembly (220) includes: The first mounting bracket (221) includes an annular member (2211) and a support member (2212), wherein the annular member (2211) is fastened to the flange (100) and the support member (2212) is fixed to the inner side of the annular member (2211); The second mounting bracket (222) includes a first rod (2221) and a second rod (2222). The first rod (2221) is disposed opposite to the annular member (2211). The two ends of the first rod (2221) are respectively connected to the annular member (2211) through a second rod (2222). The two ends of the screen cylinder (210) are rotatably connected to the first rod (2221) and the support (2212) respectively, and each of the second rods (2222) is provided with the first scraper (410).

3. The self-cleaning filter device according to claim 2, characterized in that, The filter assembly also includes a rotating shaft (223), which passes through the screen cylinder (210) and is coaxially fixed with the screen cylinder (210). The two ends of the rotating shaft (223) are rotatably connected to the first rod (2221) and the support member (2212), respectively.

4. The self-cleaning filter device according to claim 3, characterized in that, The first rod (2221) is provided with a first rotating seat (22211), and a first bearing is provided inside the first rotating seat (22211). The support (2212) is provided with a second rotating seat, and a second bearing is provided inside the second rotating seat. The two ends of the rotating shaft (223) are rotatably connected to the first rotating seat (22211) and the second rotating seat respectively through the first bearing and the second bearing.

5. The self-cleaning filter device according to claim 2, characterized in that, The bracket assembly (220) further includes a gasket (224) sandwiched between the flange (100) and the annular member (2211).

6. The self-cleaning filter device according to claim 2, characterized in that, The first scraper (410) includes: Mounting plate (411) is fixed to the second rod (2222); A connecting plate (412) and a first cutter head (413) are provided. One end of the connecting plate (412) is connected to the mounting plate (411), and the other end is connected to the first cutter head (413). The first cutter head (413) can slide in contact with the outer wall of the screen cylinder (210).

7. The self-cleaning filter device according to claim 3, characterized in that, The screen cylinder (210) includes: The cylindrical body (211) has a hollow cylindrical structure with openings at both ends, and a number of first ventilation holes (2111) are provided on the peripheral wall of the cylindrical body (211). A first plate (212) is disposed at the first end of the cylinder (211) and fixed to the rotating shaft (223). The first plate (212) is provided with a plurality of first ventilation holes (2111). The second plate (213) is disposed at the second end of the cylinder (211) and fixed to the rotating shaft (223). The second plate (213) is provided with a plurality of second vent holes (2131); wherein the diameter of the second vent hole (2131) is larger than the diameter of the first vent hole (2111).

8. The self-cleaning filter device according to claim 3, characterized in that, The drive component (300) includes: A fixing seat (310) is disposed on the bracket assembly (220); A driving component (320) is disposed on the fixed base (310), and the output end of the driving component (320) is connected to the rotating shaft (223) for transmission.

9. The self-cleaning filter device according to claim 8, characterized in that, The drive assembly (300) further includes a protective cover (330), the drive member (320) is located inside the hot air duct, and the protective cover (330) covers the drive member (320) and is sealed to the fixed base (310).

10. The self-cleaning filter device according to any one of claims 1-9, characterized in that, The cleaning assembly further includes a second scraper (420) which is radially disposed on the support assembly (220) along the screen cylinder (210) and is capable of cleaning the end face of the screen cylinder (210) away from the flange (100) when the drive assembly (300) drives the screen cylinder (210) to rotate.

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