A filter self-cleaning ventilation device

Abstract

The present invention relates to the technical field of self-cleaning filter screens, and discloses a self-cleaning filter screen ventilation device, comprising a ventilation duct, wherein a protective plate is arranged at the air inlet of the ventilation duct, a guide frame is arranged at the air outlet of the ventilation duct, a plurality of guide plates are arranged on the guide frame, a fan and a plurality of filter screens are installed in the ventilation duct, a plurality of detection plates are arranged on both sides of each filter screen, a detection compartment is fixedly installed on the ventilation duct, and each detection plate is rotatably installed in the ventilation duct. In this ventilation device, the detection plates are used to detect the air volume on both sides of the filter screen. When the filter screen works normally, the detection plates on both sides thereof are rotated by the wind force, and drive the connecting block and the connecting rod to overcome the elastic force of the first torsion spring to rotate, so that the magnetic block at the end of the push rod contacts the magnetic plate. When the filter screen is dirty, its air volume decreases, and there will be a difference in the rotation amount of the detection plates on both sides. The elastic force of the first torsion spring causes the detection plate on one side to reverse, and drives the magnetic block on one side to break away from the attraction of the magnetic plate, indicating that the filter screen needs to be cleaned.

Description

Technical Field

[0001] The invention relates to the technical field of filter self-cleaning, in particular to a filter self-cleaning ventilation device. Background Art

[0002] Ventilation equipment is a general term for various facilities used in buildings to complete ventilation work. Its main function is to deliver enough fresh air to the indoor space so that the indoor air meets the hygiene requirements and the needs of the production process. The basic principle of ventilation equipment to generate airflow is to use an electric motor to drive the fan to rotate, so that the fan rotates and generates the required air flow, sucks the air into the equipment, and transports the air to the space that needs ventilation through pipes or air outlets. At the same time, the ventilation equipment is also equipped with a filter device to remove pollutants such as particulate matter, dust, and harmful gases in the air. The filter device can intercept particulate matter of different sizes layer by layer to ensure the cleanliness of the output air. Some advanced ventilation equipment also uses electrostatic dust removal, activated carbon adsorption and other technologies to further improve the air purification effect;

[0003] The filter device in the ventilation equipment usually includes multiple layers of filters, which can filter pollutants in the air step by step. After working for a long time, more pollutants will adhere to the surface of the filter, and these pollutants need to be cleaned in time to ensure the filtering effect of the filter. The existing cleaning method is usually manual disassembly and cleaning, or regular cleaning by a self-cleaning device. The amount of pollutants in the air may be different in different seasons. For example, there may be more catkins in the air in spring. When the self-cleaning device is used to clean the filter regularly, it may not be possible to clean it in time according to the degree of dirtiness of the filter. In addition, since different filters have different diameters of pollutants filtered in the ventilation equipment, their degree of dirtiness is also different. If all filters are cleaned uniformly, some filters may be cleaned too frequently and their filtering effect will be affected to a certain extent. For this reason, we propose a self-cleaning ventilation device with filters. Summary of the invention

[0004] The object of the present invention is to provide a self-cleaning ventilation device with a filter screen to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a filter self-cleaning ventilation device, comprising a ventilation duct, a protective plate is arranged at the air inlet of the ventilation duct, a guide frame is arranged at the air outlet thereof, a plurality of guide plates are arranged on the guide frame, a fan and a plurality of filters are fixedly installed in the ventilation duct, a plurality of detection plates are arranged on both sides of each of the filters, a detection chamber is fixedly installed on the ventilation duct, each of the detection plates is rotatably installed in the ventilation duct, and one end of each detection plate is inserted into the detection chamber, and one end of each detection plate is fixedly installed There are connecting blocks, each of which is fixedly connected to the inner wall of the detection chamber with a first torsion spring, each of which is fixedly installed with a plurality of connecting rods, the number of connecting rods on the connecting block corresponds to the number of filter screens on both sides of the connecting block, and a push rod is rotatably installed at one end of each connecting rod, and a plurality of limiting rings for limiting the push rod are fixed on the inner wall of the detection chamber, and the limiting rings correspond to the push rods one-to-one, and a magnetic block is fixedly installed at one end of each push rod, and a plurality of magnetic plates matching the magnetic blocks are fixedly installed in the detection chamber, and the magnetic plates correspond to the filter screens one-to-one;

[0006] A device bin is fixedly installed on the ventilation duct, a vacuum cleaner is fixedly installed on the device bin, a plurality of cylinders are fixedly installed in the device bin, the cylinders correspond to the filters one by one, a dust suction port used in conjunction with the vacuum cleaner is fixedly installed at the output end of each cylinder, and a cover plate is provided on the ventilation duct below each dust suction port.

[0007] Preferably, a guide groove is provided on the ventilation duct on one side of each filter, an adjusting bin is fixedly installed on the ventilation duct, a plurality of guide bins for collecting the airflow in the guide groove are fixedly installed on the inner wall of the adjusting bin, the guide bins correspond to the guide grooves one by one, a dust blowing port is also fixedly installed on the output end of each cylinder, a flexible air duct is fixedly connected between each dust blowing port and the corresponding guide bin, and a cover plate is also provided on the ventilation duct below each dust blowing port.

[0008] Preferably, a plurality of collecting plates for guiding the airflow into the guide groove are fixedly installed in the ventilation duct, and a wind shield plate for blocking the airflow from entering the guide groove is slidably installed on each of the collecting plates. The collecting plates and the wind shield plates correspond to the guide grooves one by one, and limiting blocks are fixedly installed on the upper and lower ends of each of the wind shields, and a sliding groove for guiding the limiting blocks is provided on the upper and lower ends of each of the collecting plates. The ventilation duct is provided with a plurality of limiting grooves for limiting the upper and lower ends of the wind shield.

[0009] Preferably, a first spring is fixedly mounted on each of the dust suction ports, a first wedge block is fixedly mounted on the upper end of each of the first springs, a plurality of guide grooves for limiting the first wedge blocks are arranged on the inner wall of the device bin, the guide grooves correspond one-to-one to the first wedge blocks, a second wedge block matching with the first wedge block is arranged below each of the first wedge blocks, and the lower end of each of the second wedge blocks is rotatably connected to the corresponding wind shield plate.

[0010] Preferably, a guide block is fixedly mounted on each of the second wedge-shaped blocks, and a plurality of slide rails for limiting the guide block are fixedly mounted on the inner wall of the adjustment bin, the slide rails correspond one-to-one to the guide blocks, and a second spring is fixedly connected between each of the second wedge-shaped blocks and the inner wall of the adjustment bin.

[0011] Preferably, adjustment grooves are provided on both sides of the guide frame, and transmission wheels are fixedly installed at both ends of each guide plate. Each transmission wheel is rotatably installed in the corresponding adjustment groove. The transmission wheels are connected by a transmission belt. A plurality of elastic blocks are fixedly installed at the lower end of each transmission belt, and a card slot for limiting the elastic block is provided at the bottom of each adjustment groove.

[0012] Preferably, a plurality of elastic strips are fixedly installed around the guide frame and the protective plate, and snap-in strips matching with the elastic strips are fixedly installed around the air outlet and the air inlet of the ventilation duct.

[0013] Preferably, each of the dust suction ports and each of the dust blowing ports are respectively located on both sides of the corresponding filter screen, and the height of the dust blowing ports is smaller than the height of the dust suction ports.

[0014] Preferably, a plurality of splitter plates for evenly dividing the airflow are fixedly installed in each of the dust blowing ports.

[0015] Preferably, a plurality of second torsion springs for resetting the cover plates are fixedly connected between one end of each cover plate and the ventilation duct.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention utilizes detection plates to detect the air volume on both sides of the filter. When the filter works normally, the detection plates on both sides are rotated by the wind force, and drive the connecting block and the connecting rod to overcome the elastic force of the first torsion spring to rotate, so that the magnetic block at the end of the push rod contacts the magnetic plate. When the filter is dirty, its air volume decreases, and there will be a difference in the rotation amount of the detection plates on both sides. The elastic force of the first torsion spring causes one side of the detection plate to reverse, and drives one side of the magnetic block to break away from the attraction of the magnetic plate. At this time, it indicates that the filter needs to be cleaned, and the vacuum cleaner will be controlled to clean the filter through the corresponding dust suction port.

[0018] 2. The present invention utilizes the first wedge block to be driven down when the dust suction port is lowered, and through the cooperation of the first wedge block and the second wedge block, the wind shield plate moves along the slide groove on the collecting plate, so that part of the airflow in the ventilation duct can pass through the guide groove, the guide bin and the branch pipe, and be discharged from the dust blowing port, and the cylinder drives the dust blowing port and the dust suction port to descend synchronously. Through the cooperation of the dust suction port and the dust blowing port, the cleaning efficiency and cleaning effect are improved, the air volume at the cleaning location is increased, and the influence of the airflow in the ventilation duct on the cleaning process is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall side structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the fan structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the guide plate structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the card slot structure of the present invention;

[0024] Figure 6 This is a schematic diagram of the internal structure of the ventilation duct of the present invention;

[0025] Figure 7 This is a schematic diagram of the internal structure of the detection chamber of the present invention;

[0026] Figure 8 This is a schematic diagram of the cover plate structure of the present invention;

[0027] Fig. 9 This is a schematic diagram of the internal structure of the device bin of the present invention;

[0028] Fig.10 This is a schematic diagram of the internal structure of the regulating chamber of the present invention;

[0029] Fig.11 This is a schematic diagram of the structure of the diverter plate of the present invention;

[0030] Fig.12 This is a schematic diagram of the air duct structure of the present invention;

[0031] Fig.13 This is a schematic diagram of the structure of the diversion chamber of the present invention;

[0032] Fig.14 It is a schematic diagram of the guide groove structure of the present invention.

[0033] In the figure: 1-ventilation duct; 2-protection plate; 3-guide frame; 4-guide plate; 5-drive wheel; 6-drive belt; 7-elastic block; 8-adjustment slot; 9-card slot; 10-elastic strip; 11-card strip; 12-fan; 13-filter; 14-detection plate; 15-detection chamber; 16-connecting block; 17-first torsion spring; 18-connecting rod; 19-push rod; 20-limiting ring; 21-magnetic block; 22-magnetic plate; 23-cover plate; 24-second torsion spring ; 25-vacuum cleaner; 26-device compartment; 27-cylinder; 28-dust suction port; 29-dust blowing port; 30-dividing plate; 31-adjusting compartment; 32-collecting plate; 33-wind shield; 34-guide groove; 35-guide compartment; 36-air duct; 37-first spring; 38-guide groove; 39-first wedge block; 40-second wedge block; 41-second spring; 42-guide block; 43-slide rail; 44-limiting block; 45-slide groove; 46-limiting groove. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-14The present invention provides a technical solution: a filter self-cleaning ventilation device, comprising a ventilation duct 1, a protective plate 2 is arranged at the air inlet of the ventilation duct 1, a guide frame 3 is arranged at the air outlet thereof, a plurality of guide plates 4 are arranged on the guide frame 3, and adjustment grooves 8 are arranged on both sides of the guide frame 3. Transmission wheels 5 are fixedly installed at both ends of each guide plate 4, and each transmission wheel 5 is rotatably installed in the corresponding adjustment groove 8. The transmission wheels 5 are connected by transmission belts 6. A plurality of elastic blocks 7 are fixedly installed at the lower end of each transmission belt 6. A card slot 9 for limiting the elastic block 7 is arranged at the bottom of each adjustment groove 8. By adjusting the angle of the guide plate 4, the direction of the exhaust airflow in the ventilation duct 1 can be controlled. When one of the guide plates 4 is rotated, , all the transmission wheels 5 are driven to rotate through the transmission belt 6, so that all the guide plates 4 rotate synchronously. At the same time, the elastic block 7 is limited by the card slot 9, so that the transmission belt 6 and the transmission wheel 5 will not move due to the gravity of the guide plate 4. Several elastic strips 10 are fixedly installed around the guide frame 3 and the protective plate 2. The ventilation duct 1 is fixedly equipped with a clamping strip 11 that matches the elastic strip 10 around the air outlet and the air inlet. The protective plate 2 and the guide frame 3 are fixed on the ventilation duct 1. A fan 12 and several filters 13 are fixedly installed in the ventilation duct 1. When the fan 12 rotates, the external air is sucked into the ventilation duct 1 and discharged into the room after being filtered by the filter 13.

[0036] A plurality of detection plates 14 are arranged on both sides of each filter screen 13, a detection chamber 15 is fixedly installed on the ventilation duct 1, each detection plate 14 is rotatably installed in the ventilation duct 1, and one end thereof is inserted into the detection chamber 15, a connecting block 16 is fixedly installed at one end of each detection plate 14, a first torsion spring 17 is fixedly connected between each connecting block 16 and the inner wall of the detection chamber 15, a plurality of connecting rods 18 are fixedly installed on each connecting block 16, the number of connecting rods 18 on the connecting block 16 corresponds to the number of filters 13 on both sides of the connecting block 16, a push rod 19 is rotatably installed at one end of each connecting rod 18, a plurality of limiting rings 20 for limiting the push rod 19 are fixed on the inner wall of the detection chamber 15, and the limiting ring 20 and the push rod 19 are fixedly installed on the inner wall of the detection chamber 15. The rods 19 correspond one by one, and a magnetic block 21 is fixedly installed at one end of each push rod 19. Several magnetic plates 22 that match the magnetic block 21 are fixedly installed in the detection chamber 15. The magnetic plates 22 correspond one by one to the filter screens 13. When the fan 12 is working, the external air is sucked into the ventilation duct 1. The wind force causes the detection plate 14 to rotate, and drives the end connecting block 16 to rotate, so that the first torsion spring 17 rotates and stores force, and at the same time drives the corresponding end of the connecting rod 18 to rotate. The push rod 19 is limited by the limiting ring 20. When one end of the connecting rod 18 rotates, the push rod 19 will drive the end magnetic block 21 to move toward the corresponding magnetic plate 22, and make the magnetic block 21 close to the magnetic plate 22. When all the filters 13 are well ventilated and do not need to be cleaned , all detection plates 14 will rotate, and all magnetic blocks 21 will be close to the corresponding magnetic plates 22. When there is too much dust on the filter 13 and it needs to be cleaned, the rotation amplitude of the detection plate 14 on one side will be reduced by the wind force, and the elastic force of the first torsion spring 17 will drive one end of the connecting rod 18 to reverse, and make the push rod 19 drive the magnetic block 21 at its end to release the contact with the magnetic plate 22. Since there is a certain magnetic attraction between the magnetic plate 22 and the magnetic block 21, only when a certain amount of dust accumulates on the filter 13 and its ventilation volume is reduced to a certain extent, the detection plate 14 is subjected to the wind force and the magnetic attraction between the magnetic plate 22 and the magnetic block 21 is less than the elastic force of the first torsion spring 17, the magnetic block 21 and the magnetic plate 22 will no longer contact. 2 The filter 13 corresponding to the filter 13 needs to be cleaned. A device bin 26 is fixedly installed on the ventilation duct 1, and a dust collector 25 is fixedly installed on the device bin 26. A plurality of cylinders 27 are fixedly installed in the device bin 26. The cylinders 27 correspond to the filter 13 one by one. A dust suction port 28 used in conjunction with the dust collector 25 is fixedly installed at the output end of each cylinder 27. A cover plate 23 is provided on the ventilation duct 1 below each dust suction port 28. When a magnetic block 21 leaves the magnetic plate 22, the corresponding cylinder 27 above the filter 13 will work and drive the dust suction port 28 to descend. At the same time, the dust collector 25 works to remove dust and impurities accumulated on the filter 13 through the corresponding dust suction port 28, so as to clean the filter 13.

[0037] A guide groove 34 is provided on the ventilation duct 1 on one side of each filter screen 13, an adjustment bin 31 is fixedly installed on the ventilation duct 1, and a plurality of guide bins 35 for collecting the airflow in the guide groove 34 are fixedly installed on the inner wall of the adjustment bin 31, and the guide bins 35 correspond to the guide grooves 34 one by one. A dust blowing port 29 is also fixedly installed on the output end of each cylinder 27, and a plurality of splitter plates 30 for evenly dividing the airflow are fixedly installed in each dust blowing port 29, and a flexible air duct 36 is fixedly connected between each dust blowing port 29 and the corresponding guide bin 35, and a cover plate 23 is also provided on the ventilation duct 1 below each dust blowing port 29, and a plurality of second torsion springs 24 for resetting the cover plate 23 are fixedly connected between one end of each cover plate 23 and the ventilation duct 1, When the dust suction port 28 and the dust blowing port 29 are lowered, they support the cover plate 23 and make it rotate, and the second torsion spring 24 will rotate and store force. When the cylinder 27 drives the dust suction port 28 and the dust blowing port 29 to retract, the elastic force of the second torsion spring 24 resets the cover plate 23 to prevent the airflow in the ventilation duct 1 from entering the device bin 26. Each dust suction port 28 and each dust blowing port 29 are respectively located on both sides of the corresponding filter screen 13 to increase the dust suction air volume at the filter screen 13, improve the cleaning effect and cleaning efficiency, and the height of the dust blowing port 29 is smaller than the height of the dust suction port 28 to prevent the dust blowing port 29 from blowing too large an area of ​​dust and impurities and the dust suction port 28 cannot collect them in time. A plurality of collecting plates 32 for guiding the airflow into the guide groove 34 are fixedly installed in the ventilation duct 1, and each collecting plate 32 has a plurality of collecting plates 32 for guiding the airflow into the guide groove 34. A windshield 33 is slidably installed on each of the windshields 33 for blocking the airflow from entering the guide groove 34. The collecting plates 32 and the windshields 33 correspond to the guide grooves 34 one by one. Limit blocks 44 are fixedly installed on the upper and lower ends of each windshield 33. A sliding groove 45 for guiding the limit block 44 is provided on the upper and lower ends of each collecting plate 32. A plurality of limit grooves 46 for limiting the upper and lower ends of the windshield 33 are provided on the ventilation duct 1. A first spring 37 is fixedly installed on each dust suction port 28. A first wedge block 39 is fixedly installed on the upper end of each first spring 37. A plurality of guide grooves 38 for limiting the first wedge block 39 are provided on the inner wall of the device bin 26. The guide grooves 38 correspond to the first wedge blocks 39 one by one. Each first wedge block 39 is fixedly installed on the upper end of each dust suction port 28. A second wedge block 40 is provided below the block 39 to match it. The lower end of each second wedge block 40 is rotatably connected to the corresponding wind deflector 33. A guide block 42 is fixedly installed on each second wedge block 40. A plurality of slide rails 43 for limiting the guide block 42 are fixedly installed on the inner wall of the adjustment bin 31. The slide rails 43 correspond to the guide blocks 42 one by one. A second spring 41 is fixedly connected between each second wedge block 40 and the inner wall of the adjustment bin 31. When the dust suction port 28 descends, the first spring 37 and the first wedge block 39 thereon will be driven to move downward along the guide groove 38. The inclined surface of the first wedge block 39 cooperates with the inclined surface of the second wedge block 40, so that the second wedge block 40 moves laterally along the slide rail 43 and the second spring 41 is compressed.The first spring 37 is continuously stretched as the dust suction port 28 is continuously lowered and the second spring 41 is continuously compressed, and the second wedge block 40 drives the wind shield 33 to move laterally along the limit groove 46. At the same time, the limit block 44 is limited by the slide groove 45, so that the wind shield 33 is deflected while moving laterally, so that a part of the airflow in the ventilation duct 1 is collected by the collecting plate 32 and enters the guide bin 35 through the guide groove 34, and is transmitted to the dust blowing port 29 through the air duct 36, and then the airflow is evenly distributed through the diversion plate 30. The dust is blown out from the dust blowing port 29 in all directions. At the same time, the dust blowing port 29 is driven by the cylinder 27 to move up and down synchronously with the dust suction port 28. The cleaning effect is better through the cooperation between the dust blowing port 29 and the dust suction port 28. When the cylinder 27 drives the dust suction port 28 and the dust blowing port 29 to retract, the first spring 37 is constantly restored and finally drives the first wedge block 39 to reset. The second wedge block 40 will be reset by the elastic force of the second spring 41, and drive the wind shield 33 to reset, preventing the airflow from entering the guide chamber 35, so that the dust blowing port 29 no longer blows out gas.

[0038] Specifically, first, the protective plate 2 and the guide frame 3 are fixed on the ventilation duct 1 by limiting the elastic strip 10 through the clamping strip 11, and then the fan 12 is started. When the fan 12 rotates, the external air is sucked into the ventilation duct 1 and discharged into the room after being filtered by the filter screen 13. When one of the guide plates 4 is rotated, all the transmission wheels 5 are driven to rotate through the transmission belt 6, so that all the guide plates 4 rotate synchronously. At the same time, the elastic block 7 is limited by the clamping slot 9, so that the transmission belt 6 and the transmission wheel 5 will not move due to the gravity of the guide plate 4. By adjusting the angle of the guide plate 4, the direction of the exhaust air flow in the ventilation duct 1 can be controlled. When the fan 12 is working, the wind force causes the detection plate 14 to rotate, and drives its end connection block 16 to rotate, so that the first torsion spring 17 rotates to store force, and at the same time drives one end of the corresponding connecting rod 18 to rotate. Through the limit ring 20 to limit the push rod 19, when one end of the connecting rod 18 rotates, the push rod 19 will drive its end magnetic block 21 to move toward the corresponding magnetic plate 22, and make the magnetic block 21 close to the magnetic plate 22. When all the filter screens 13 are well ventilated and do not need to be cleaned, all the detection plates 14 will rotate, and make all the magnetic blocks 21 close to the corresponding magnetic plates 22. When there is too much dust on the filter screen 13 and it needs to be cleaned, the rotation amplitude of the detection plate 14 on one side will be reduced by the wind force, and the elastic force of the first torsion spring 17 will drive one end of the connecting rod 18 to reverse, and make the push rod 19 drive its end magnetic block 21 to release the contact with the magnetic plate 22. Since there is a certain magnetic field between the magnetic plate 22 and the magnetic block 21 Suction, only when a certain amount of dust accumulates on the filter 13 and its ventilation volume is reduced to a certain extent, the detection plate 14 is subjected to the wind force plus the magnetic attraction between the magnetic plate 22 and the magnetic block 21 is less than the elastic force of the first torsion spring 17, the magnetic block 21 and the magnetic plate 22 will no longer contact, indicating that the filter 13 corresponding to the magnetic plate 22 needs to be cleaned. When a magnetic block 21 leaves the magnetic plate 22, the corresponding cylinder 27 above the filter 13 will work and drive the dust suction port 28 to descend. At the same time, the vacuum cleaner 25 works to remove the dust and impurities accumulated on the filter 13 through the corresponding dust suction port 28 to clean the filter 13. When the dust suction port 28 descends, it will drive the first spring 37 and the first wedge block 39 thereon to move downward along the guide groove 38. The first wedge block 39 The inclined surface cooperates with the inclined surface of the second wedge block 40, so that the second wedge block 40 moves laterally along the slide rail 43 and the second spring 41 is compressed. The first spring 37 is continuously stretched as the dust suction port 28 continues to descend and the second spring 41 is continuously compressed. The second wedge block 40 will drive the wind shield plate 33 to move laterally along the limiting groove 46. At the same time, the limiting block 44 is limited by the slide groove 45, so that the wind shield plate 33 is deflected while moving laterally, so that a part of the airflow in the ventilation duct 1 is collected by the collecting plate 32 and enters the guide bin 35 through the guide groove 34, and is transmitted to the dust blowing port 29 through the air duct 36. Then, the airflow is diverted by the diverter plate 30, so that the airflow can be evenly blown out from all directions in the dust blowing port 29. At the same time, the dust blowing port 29 is driven by the cylinder 27.It moves up and down synchronously with the dust suction port 28. The cleaning effect is better through the cooperation of the dust blowing port 29 and the dust suction port 28. When the dust suction port 28 and the dust blowing port 29 are lowered, they support the cover plate 23 and make it rotate. The second torsion spring 24 will rotate and store force. When the cylinder 27 drives the dust suction port 28 and the dust blowing port 29 to retract, the elastic force of the second torsion spring 24 resets the cover plate 23 to prevent the airflow in the ventilation duct 1 from entering the device bin 26. When the cylinder 27 drives the dust suction port 28 and the dust blowing port 29 to retract, the first spring 37 is constantly restored and finally drives the first wedge block 39 to reset. The second wedge block 40 will be reset by the elastic force of the second spring 41, and drive the windshield 33 to reset, preventing the airflow from entering the guide bin 35, so that the dust blowing port 29 no longer blows out gas.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-cleaning filter ventilation device, comprising a ventilation duct (1), characterized in that: The ventilation duct (1) is provided with a protective plate (2) at the air inlet, and a guide frame (3) is provided at the air outlet. The guide frame (3) is provided with a plurality of guide plates (4). A fan (12) and a plurality of filters (13) are fixedly installed in the ventilation duct (1). A plurality of detection plates (14) are provided on both sides of each of the filters (13). A detection chamber (15) is fixedly installed on the ventilation duct (1). Each of the detection plates (14) is rotatably installed in the ventilation duct (1), and one end of each of the detection plates (14) is inserted into the detection chamber (15). A connecting block (16) is fixedly installed at one end of each of the detection plates (14). Each of the connecting blocks (16) is fixedly connected to the inner wall of the detection chamber (15). a torsion spring (17), a plurality of connecting rods (18) being fixedly mounted on each of the connecting blocks (16), the number of the connecting rods (18) on the connecting blocks (16) corresponding to the number of the filter screens (13) on both sides of the connecting blocks (16), a push rod (19) being rotatably mounted on one end of each of the connecting rods (18), a plurality of limiting rings (20) for limiting the push rods (19) being fixed on the inner wall of the detection chamber (15), the limiting rings (20) corresponding one-to-one with the push rods (19), a magnetic block (21) being fixedly mounted on one end of each of the push rods (19), a plurality of magnetic plates (22) matching the magnetic blocks (21) being fixedly mounted in the detection chamber (15), the magnetic plates (22) corresponding one-to-one with the filter screens (13); A device bin (26) is fixedly mounted on the ventilation duct (1), a dust collector (25) is fixedly mounted on the device bin (26), a plurality of cylinders (27) are fixedly mounted in the device bin (26), the cylinders (27) correspond to the filter screens (13) one by one, a dust suction port (28) for use with the dust collector (25) is fixedly mounted on the output end of each of the cylinders (27), and a cover plate (23) is provided on the ventilation duct (1) below each of the dust suction ports (28).

2. A self-cleaning filter ventilation device according to claim 1, characterized in that: A guide groove (34) is provided on the ventilation duct (1) on one side of each filter screen (13); an adjustment chamber (31) is fixedly mounted on the ventilation duct (1); a plurality of guide chambers (35) for collecting airflow in the guide groove (34) are fixedly mounted on the inner wall of the adjustment chamber (31); the guide chambers (35) correspond to the guide grooves (34) in a one-to-one manner; a dust blowing port (29) is also fixedly mounted on the output end of each cylinder (27); a flexible air duct (36) is fixedly connected between each dust blowing port (29) and the corresponding guide chamber (35); and a cover plate (23) is also provided on the ventilation duct (1) below each dust blowing port (29).

3. A filter self-cleaning ventilation device according to claim 2, characterized in that: A plurality of current collecting plates (32) for guiding airflow into the guide groove (34) are fixedly installed in the ventilation duct (1); a windshield plate (33) for blocking airflow from entering the guide groove (34) is slidably installed on each of the current collecting plates (32); the current collecting plates (32) and the windshield plates (33) correspond to the guide groove (34) in a one-to-one manner; a limiting block (44) is fixedly installed at both upper and lower ends of each of the windshield plates (33); a sliding groove (45) for guiding the limiting block (44) is provided at both upper and lower ends of each of the current collecting plates (32); and a plurality of limiting grooves (46) for limiting the upper and lower ends of the windshield plates (33) are provided on the ventilation duct (1).

4. A self-cleaning filter ventilation device according to claim 3, characterized in that: A first spring (37) is fixedly mounted on each of the suction ports (28); a first wedge block (39) is fixedly mounted on the upper end of each of the first springs (37); a plurality of guide grooves (38) for limiting the first wedge blocks (39) are arranged on the inner wall of the device bin (26); the guide grooves (38) correspond one to one with the first wedge blocks (39); a second wedge block (40) matching with the first wedge block (39) is arranged below each of the first wedge blocks (39); and a lower end of each of the second wedge blocks (40) is rotatably connected to a corresponding windshield plate (33).

5. A self-cleaning filter ventilation device according to claim 4, characterized in that: A guide block (42) is fixedly mounted on each of the second wedge-shaped blocks (40), and a plurality of slide rails (43) for limiting the guide block (42) are fixedly mounted on the inner wall of the adjustment chamber (31), wherein the slide rails (43) correspond to the guide blocks (42) one by one, and a second spring (41) is fixedly connected between each of the second wedge-shaped blocks (40) and the inner wall of the adjustment chamber (31).

6. The filter self-cleaning ventilation device according to claim 1, characterized in that: Adjustment grooves (8) are provided on both sides of the guide frame (3), transmission wheels (5) are fixedly mounted on both ends of each guide plate (4), each transmission wheel (5) is rotatably mounted in a corresponding adjustment groove (8), the transmission wheels (5) are connected to each other through a transmission belt (6), a plurality of elastic blocks (7) are fixedly mounted on the lower end of each transmission belt (6), and a clamping groove (9) for limiting the elastic block (7) is provided at the bottom of each adjustment groove (8).

7. A self-cleaning filter ventilation device according to claim 6, characterized in that: A plurality of elastic strips (10) are fixedly mounted around the guide frame (3) and the protective plate (2), and snap-on strips (11) matching the elastic strips (10) are fixedly mounted around the air outlet and the air inlet of the ventilation duct (1).

8. The filter self-cleaning ventilation device according to claim 2, characterized in that: Each of the dust suction ports (28) and each of the dust blowing ports (29) are respectively located on two sides of the corresponding filter screen (13), and the height of the dust blowing ports (29) is smaller than the height of the dust suction ports (28).

9. A self-cleaning filter ventilation device according to claim 8, characterized in that: A plurality of flow divider plates (30) for evenly dividing the airflow are fixedly installed in each of the dust blowing ports (29).

10. The filter self-cleaning ventilation device according to claim 1, characterized in that: A plurality of second torsion springs (24) for resetting the cover plate (23) are fixedly connected between one end of each cover plate (23) and the ventilation duct (1).

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