Air filter device with filter self-cleaning function

Abstract

The present invention relates to the technical field of air filtration and treatment, and specifically discloses an air filtration device with a filter screen self-cleaning function, comprising a casing, a coarse filter screen, a filter element, a support plate and a partition plate, wherein the coarse filter screen, the support plate, the partition plate and the filter element are all installed in the casing and distributed from bottom to top, a limited position structure is arranged in the casing, a base is arranged at the bottom end of the casing, an air outlet plate is arranged at the top end of the casing, an exhaust assembly is arranged between the support plate and the coarse filter screen, an air flow regulating assembly is arranged between the support plate and the partition plate, a dust collecting chamber is formed between the support plate, the partition plate and the casing, an open port is arranged on one side of the casing, a pull-out plate is arranged at the open port of the casing, and a dust collecting assembly is arranged on the inner wall of the pull-out plate. The present invention has a suction type automatic cleaning structure for filter screen dust, improves the cleaning efficiency and effect of the coarse filter screen, saves labor costs, and is more convenient to use.

Description

Technical Field

[0001] The invention relates to the technical field of air filtering and processing, and in particular to an air filtering device with a filter self-cleaning function. Background Art

[0002] An air filter is a device that captures dust from gas-solid two-phase flow and purifies the gas through the action of porous filter materials. It purifies the air with low dust content and sends it into the room to ensure the process requirements of the clean room and the air cleanliness in the general air-conditioned room. It is generally used in clean workshops, clean factories, laboratories and clean rooms, or for dust prevention of electronic mechanical communication equipment. General ventilation filters are used to capture and adsorb dust particles of different particle sizes in the air to improve the air quality. In addition to adsorbing dust, chemical filters can also absorb odors. They are also commonly used in biopharmaceuticals, hospitals, airport terminals, human living environments and other places.

[0003] Chinese patent (CN215137987U) discloses an air filter device that is easy to replace and clean the filter, including a base, universal wheels are fixedly installed on the left and right sides of the lower bottom surface of the base, and a brake clamp is movably connected to the upper end of one side of the universal wheel, an air filter body is fixedly installed on the upper surface of the base, and a No. 1 motor is fixedly installed on the left side inside the base.

[0004] However, there are some disadvantages in the above-mentioned related technologies. For example, during the use of some air filtering devices, since the filter is generally cleaned only by a brush head and a driving assembly, some dust is easily pushed into the filter on one side of the air filtering device, resulting in insufficient cleaning effect and insufficient cleaning efficiency. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides an air filtering device with a filter self-cleaning function.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The air filter device with a self-cleaning filter screen function comprises a casing, a coarse filter screen, a filter element, a support plate and a partition, wherein the coarse filter screen, the support plate, the partition and the filter element are all installed in the casing and are distributed from bottom to top, and a limiting structure for fixing the filter element is arranged in the casing, the bottom end of the casing is arranged with a base, the top end of the casing is arranged with an air outlet plate, an exhaust assembly is arranged between the support plate and the coarse filter screen, an air flow adjustment assembly is arranged between the support plate and the partition, a dust collecting chamber is formed between the support plate, the partition and the casing, an opening is arranged on one side of the casing, a pull-out plate is arranged on the opening of the casing, a bent rod is arranged on a side of the pull-out plate away from the casing, a dust collecting assembly is arranged on an inner wall of the pull-out plate, a communicating box seat is arranged on the top end of the base, the top end of the box seat is fixedly connected to the coarse filter screen by bolts, a drainage assembly for cleaning the coarse filter screen is arranged in the box seat, and the drainage assembly is communicated with the dust collecting chamber;

[0008] The airflow adjustment component includes a first drainage tube and a second drainage tube, the first drainage tube is fixed and installed through the top of the support plate, the second drainage tube is slidably sleeved on the outer wall of the first drainage tube, the second drainage tube is penetrated and slidably connected to the partition, the side walls of the second drainage tube and the first drainage tube are each provided with four drainage holes with the same aperture, the distance from the drainage hole to the partition is smaller than the distance to the support plate, a sealing plate is fixedly installed on the top of the second drainage tube, the sealing plate is located above the partition, an electric push rod is fixedly installed on the top of the support plate, the electric push rod is located on the side of the support plate away from the pull-out plate, and the movable end of the electric push rod is fixedly connected to the bottom end of the sealing plate.

[0009] Preferably, the limiting structure includes a mounting plate, which is installed in the casing, and a support sleeve is arranged at the top of the mounting plate, and the support sleeve is arranged in a sleeve-connected manner with the filter element, and two studs are penetrated through the top of the support sleeve, and the studs are threadedly connected with an eccentric disk for pressing the filter element, and two first folding plates are installed on the top of the mounting plate by bolts, and the vertical section of the first folding plate is fixedly connected to the casing by bolts.

[0010] Preferably, two second folding plates are mounted on the bottom end of the support plate by bolts, and the vertical sections of the second folding plates are fixedly connected to the casing by bolts.

[0011] Preferably, the exhaust assembly includes a forward and reverse rotating fan, a square tube is fixedly installed on the bottom end of the support plate, a rubber layer is provided on the bottom end of the square tube, the bottom end of the square tube is fitted with the top end of the box seat, the forward and reverse rotating fan is installed on the bottom end of the support plate, and the coarse filter and the forward and reverse rotating fan are both located in the square tube.

[0012] Preferably, the dust collecting assembly includes a U-shaped side plate, a U-shaped bottom plate and a U-shaped frame, the U-shaped bottom plate is fixedly installed on the bottom end of the U-shaped side plate, the U-shaped frame is fixedly installed on the top end of the U-shaped side plate, the U-shaped bottom plate and the U-shaped frame are both provided with snap-in grooves on the sides facing each other, a fine filter screen is installed between the U-shaped side plate, the U-shaped bottom plate and the U-shaped frame through the snap-in grooves, two air inlet holes are provided on the top end of the U-shaped bottom plate, the air inlet holes match the telescopic tube, the inner wall of the pull-out plate is provided with two convex plates, and the convex plates are fixedly connected to the U-shaped side plates.

[0013] Preferably, the drainage assembly includes an exhaust box, both ends of the exhaust box are provided with interconnected curved pipes, the curved pipes pass through the box seat, the end of the curved pipe away from the exhaust box is connected with a telescopic tube, the top smooth section of the telescopic tube is penetrated and fixedly connected with the support plate, a roller brush is rotatably installed on the top of the exhaust box, the roller brush matches the coarse filter screen, comb teeth are provided in the middle part of the exhaust box, the comb teeth match the bristles of the roller brush, and slide grooves are provided on the opposite sides of the box seat, and the slide grooves match the adjacent curved pipes.

[0014] Preferably, the driving mechanism includes a servo motor, two support rods are installed between the opposite sides of the box seat, a slider is slidably installed between the two support rods, a screw is rotatably installed in the box seat, the screw and the slider are threadedly connected, the servo motor is fixedly installed on one side outer wall of the box seat, the output shaft of the servo motor is fixedly connected to the shaft of the screw through a coupling, and two plug-in blocks are provided at the bottom end of the exhaust box, the plug-in block and the slider are penetrated, and the plug-in block and the slider are fixedly connected by bolts.

[0015] Preferably, the open wall of the housing is provided with a rubber pad matching the pull-out plate, and positioning blocks are fixedly mounted on the inner walls on both sides facing each other, and the positioning blocks are fixedly connected to the pull-out plate by bolts.

[0016] Preferably, a display screen is provided on a side of the housing away from the pull-out plate, and four universal pulleys are provided at the bottom end of the base, and a self-locking structure is provided inside the universal pulleys.

[0017] The beneficial effects of the present invention are:

[0018] 1. By arranging the installation of the drainage component and the airflow adjustment component, the beneficial effect that can be obtained is that when the air filter device is running, the electric push rod drives the sealing plate and the second drainage pipe to move upward synchronously, the second drainage pipe blocks the drainage holes on the first drainage pipe, and the drainage holes on the second drainage pipe are located above the partition plate, the forward and reverse blower draws air outside the casing into the casing, and passes through the box seat, the coarse filter, the square tube, the first drainage pipe in the dust collection chamber, the drainage holes on the second drainage pipe, the filter element and the air outlet plate to discharge the air from the casing in sequence, and when the air filter device cleans the coarse filter ... the drainage holes on the second drainage pipe, the filter element and the air outlet plate to move upward synchronously, the second drainage pipe blocks the drainage holes on the second drainage pipe, the filter element and the air outlet plate to move upward synchronously, the second drainage pipe blocks the drainage holes on the second drainage pipe, the filter element and the air outlet plate to move upward synchronously, the second drainage pipe blocks the drainage holes on the second drainage pipe, the filter element and the air outlet plate to move upward synchronously, the second drainage pipe blocks the drainage holes on the second drainage pipe, the filter element and the air outlet plate to move upward synchronously, the second drainage pipe blocks the drainage holes on the second drainage pipe, the filter element and the air outlet plate to move upward synchronously, the second drainage pipe blocks the drainage holes on the second The drainage pipes move downward synchronously, the drainage holes on the second drainage pipe and the first drainage pipe overlap, and the drainage holes are located below the partition. The forward and reverse rotating fans draw air outside the casing into the casing to reversely flush the filter. The exhaust box is in a negative pressure state, and the airflow carries the dust on the coarse filter into the exhaust box. The airflow flows out from the exhaust box, the bent pipe, the telescopic pipe, the dust collecting component in the dust collecting chamber, the fine filter, the overlapping drainage holes, the first drainage pipe, the square tube and the coarse filter in turn. The dust collecting component collects dust and has an automatic suction cleaning structure for the filter dust, which saves labor costs and is more convenient to use.

[0019] 2. By setting the roller brush and comb teeth, the beneficial effect that can be obtained is that the forward and reverse rotating fans draw the air outside the casing into the casing, reversely flush the filter, the exhaust box is in a negative pressure state, the airflow carries the dust on the coarse filter into the exhaust box, the roller brush rotates to brush the lower surface of the coarse filter, accelerates the separation of dust from the coarse filter, the rotating brushing structure improves the cleaning efficiency of the filter, the comb teeth clean the dust attached to the roller brush, the dust separates from the roller brush and enters the exhaust box, thereby improving the cleaning efficiency and effect of the coarse filter.

[0020] 3. By setting up the dust collecting component, the beneficial effect that can be obtained is that the airflow carries the dust and flows out from the exhaust box, the bent pipe, the telescopic pipe, the dust collecting component in the dust collecting chamber, the fine filter, the overlapping drainage holes, the first drainage pipe, the square pipe and the coarse filter in sequence, and the U-shaped side plate, the U-shaped bottom plate, the U-shaped frame and the fine filter collect the dust. After a certain amount of dust is collected, the pull-out plate is pulled out by holding the bent pipe, and the U-shaped side plate, the U-shaped bottom plate, the U-shaped frame and the fine filter are taken out, and the dust is poured out of the U-shaped frame. It has an automatic dust collection structure, which is convenient for cleaning dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a diagram of the installation structure of the universal pulley in the present invention;

[0024] Figure 3This is a diagram of the installation structure of the electric push rod in the present invention;

[0025] Figure 4 This is a diagram of the installation structure of the partition in the present invention;

[0026] Figure 5 This is a structural diagram of the installation of the filter element in the present invention;

[0027] Figure 6 It is the installation structure diagram of the limiting structure in the present invention;

[0028] Figure 7 This is a diagram of the installation structure of the coarse filter in the present invention;

[0029] Figure 8 This is a diagram of the installation structure of the forward and reverse rotating fan in the present invention;

[0030] Fig. 9 A state diagram of the airflow regulating component during the operation of the filtering device of the present invention;

[0031] Fig.10 It is the installation structure diagram of the box seat in the present invention;

[0032] Fig.11 is a cross-sectional view of the exhaust box in the present invention;

[0033] Fig.12 It is an exploded view of the dust collecting assembly in the present invention.

[0034] Description of reference numerals:

[0035] In the figure: 1, housing; 11, display screen; 12, base; 13, air outlet plate; 14, pull-out plate; 15, bending rod; 16, positioning block; 17, universal pulley; 2, coarse filter; 21, box seat; 22, support rod; 23, slider; 24, screw; 25, servo motor; 3, filter element; 31, mounting plate; 32, support sleeve; 33, stud; 34, eccentric disk; 35, first folding plate; 4, support plate; 41, second folding plate ; 42. Square tube; 43. Forward and reverse fan; 44. First drainage pipe; 45. Second drainage pipe; 46. Sealing plate; 47. Drainage hole; 48. Electric push rod; 5. Partition; 61. Exhaust box; 62. Bend pipe; 63. Telescopic pipe; 64. Roller brush; 65. Comb teeth; 66. Slide groove; 67. Plug-in block; 71. U-shaped side panel; 72. U-shaped bottom plate; 73. U-shaped frame; 74. Fine filter; 75. Air inlet; 76. Convex plate. DETAILED DESCRIPTION

[0036] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are clearly and completely described below in combination with the accompanying drawings and preferred embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0037] In the description of the present application, it should be understood that the orientation or position relationship indicated by "inside", "outside", etc. is based on the orientation or position described in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, a specific orientation structure and operation, and therefore cannot be understood as a limitation on the present application.

[0038] Reference Figure 1-Figure 6 , is an air filtering device with a filter self-cleaning function disclosed by the present invention, comprising a casing 1, a coarse filter 2, a filter element 3, a support plate 4 and a partition 5, the coarse filter 2, the support plate 4, the partition 5 and the filter element 3 are all installed in the casing 1 and are distributed from bottom to top, an open port is provided on one side of the casing 1, a pull-out plate 14 is provided on the open port of the casing 1, a bent rod 15 is provided on the side of the pull-out plate 14 away from the casing 1, a rubber pad matching the pull-out plate 14 is provided on the wall of the open port of the casing 1, positioning blocks 16 are fixedly installed on the inner walls of the casing 1 on both sides facing each other, the positioning blocks 16 are fixedly connected to the pull-out plate 14 by bolts, a display screen 11 is provided on the side of the casing 1 away from the pull-out plate 14, and four universal pulleys are provided at the bottom end of the base 12 17. A self-locking structure is arranged in the universal pulley 17, and a limiting structure for fixing the filter element 3 is arranged in the casing 1. The limiting structure includes a mounting plate 31, and the mounting plate 31 is installed in the casing 1. A support sleeve 32 is arranged at the top of the mounting plate 31. The support sleeve 32 and the filter element 3 are sleeved and have a supporting function. Two studs 33 are penetrated through the top of the support sleeve 32. The studs 33 are threadedly connected with an eccentric disk 34 for pressing the filter element 3. Two first folding plates 35 are installed at the top of the mounting plate 31 by bolts. The vertical section of the first folding plate 35 is fixedly connected to the casing 1 by bolts. The filter element 3 is placed on the top of the mounting plate 31, and the two eccentric disks 34 are respectively rotated on the two studs 33 to fix the filter element 3.

[0039] Reference Figure 2-Figure 4 and Figure 8-Figure 9Two second folding plates 41 are installed at the bottom end of the support plate 4 by bolts, and the vertical section of the second folding plate 41 is fixedly connected to the casing 1 by bolts, which has a supporting function. A base 12 is arranged at the bottom end of the casing 1, which has a supporting function. An air outlet plate 13 is arranged at the top of the casing 1, which has supporting and ventilation functions. An exhaust assembly is arranged between the support plate 4 and the coarse filter 2, and the exhaust assembly includes a forward and reverse fan 43. A square tube 42 is fixedly installed at the bottom end of the support plate 4, and a rubber layer is arranged at the bottom end of the square tube 42. The bottom end of the square tube 42 is fitted with the top end of the box seat 21, and the forward and reverse fan 43 is installed at the bottom end of the support plate 4. The coarse filter 2 and the forward and reverse fan 43 are both located in the square tube 42. The forward and reverse fan 43 has forward and reverse exhaust functions, and the square tube 42 has a current limiting function.

[0040] Reference Figure 2-Figure 4 and Figure 8-Figure 9 An airflow regulating assembly is provided between the support plate 4 and the partition plate 5, and the airflow regulating assembly includes a first drainage tube 44 and a second drainage tube 45. The first drainage tube 44 is fixed and installed through the top of the support plate 4, and the second drainage tube 45 is slidably sleeved on the outer wall of the first drainage tube 44. The second drainage tube 45 is penetrated and slidably connected with the partition plate 5, and has a drainage function. The side walls of the second drainage tube 45 and the first drainage tube 44 are both provided with four drainage holes 47 with the same aperture, and the distance from the drainage hole 47 to the partition plate 5 is smaller than the distance to the support plate 4. A sealing plate 46 is fixedly installed on the top of the second drainage tube 45, and the sealing plate 46 is located above the partition plate 5. An electric The electric push rod 48 is located on the side of the support plate 4 away from the pull-out plate 14. The movable end of the electric push rod 48 is fixedly connected to the bottom end of the sealing plate 46, and has a supporting function. When the air filtering device is running, the electric push rod 48 drives the sealing plate 46 and the second drainage pipe 45 to move upward synchronously. The second drainage pipe 45 blocks the drainage hole 47 on the first drainage pipe 44, and the drainage hole 47 on the second drainage pipe 45 is located above the partition 5. The forward and reverse fan 43 draws air outside the casing 1 into the casing 1, and passes through the box seat 21, the coarse filter 2, the square tube 42, the first drainage pipe 44 in the dust collecting chamber, the drainage hole 47 on the second drainage pipe 45, the filter element 3 and the air outlet plate 13 in sequence to be discharged from the casing 1.

[0041] Reference Figure 1-Figure 4 and Figure 11-Figure 12A dust collecting chamber is formed between the support plate 4, the partition plate 5 and the casing 1, and a dust collecting assembly is provided on the inner wall of the pull-out plate 14. The dust collecting assembly includes a U-shaped side plate 71, a U-shaped bottom plate 72 and a U-shaped frame 73. The U-shaped bottom plate 72 is fixedly installed at the bottom end of the U-shaped side plate 71, and the U-shaped frame 73 is fixedly installed at the top end of the U-shaped side plate 71. A clamping groove is provided on the opposite sides of the U-shaped bottom plate 72 and the U-shaped frame 73. A fine filter screen 74 is installed between the U-shaped side plate 71, the U-shaped bottom plate 72 and the U-shaped frame 73 through the clamping groove. Two air inlet holes 75 are provided on the top of the U-shaped bottom plate 72, and two convex plates 76 are provided on the inner wall of the pull-out plate 14. The convex plate 76 is fixedly connected to the U-shaped side plate 71, and a communicating box seat 21 is provided at the top of the base 12. The top of the box seat 21 is fixedly connected to the coarse filter 2 by bolts. A drainage component for cleaning the coarse filter 2 is provided in the box seat 21. The drainage component is connected to the dust collecting chamber. The drainage component includes an exhaust box 61. Both ends of the exhaust box 61 are provided with a communicating elbow 62. The elbow 62 passes through the box seat 21. The end of the elbow 62 away from the exhaust box 61 is connected to a telescopic tube 63. The smooth section at the top of the telescopic tube 63 passes through and is fixedly connected to the support plate 4. The air inlet 75 matches the telescopic tube 63. The top of the exhaust box 61 A roller brush 64 is rotatably installed at the end, and the roller brush 64 matches the coarse filter 2. A comb tooth 65 is arranged in the middle of the exhaust box 61, and the comb tooth 65 matches the bristles of the roller brush 64. Both sides of the box seat 21 facing each other are provided with a slide groove 66, and the slide groove 66 matches the adjacent curved pipe 62. When the air filter device cleans the coarse filter, the electric push rod 48 drives the sealing plate 46 and the second drainage pipe 45 to move downward synchronously, and the drainage hole 47 on the second drainage pipe 45 and the first drainage pipe 44 coincides, and the drainage hole 47 is located below the partition 5. The forward and reverse blower 43 draws the air outside the casing 1 into the casing 1, and the filter 2 is reversed. The exhaust box 61 is flushed to the negative pressure state, and the airflow carries the dust on the coarse filter 2 into the exhaust box 61, and the airflow flows out from the exhaust box 61, the bent pipe 62, the telescopic pipe 63, the dust collecting assembly in the dust collecting chamber, the fine filter 74, the overlapping drainage holes 47, the first drainage pipe 44, the square tube 42 and the coarse filter 2 in sequence, and the U-shaped side plate 71, the U-shaped bottom plate 72, the U-shaped frame 73 and the fine filter 74 collect the dust. After a certain amount of dust is collected, the pulling plate 14 is pulled out by holding the bent rod 15, and the U-shaped side plate 71, the U-shaped bottom plate 72, the U-shaped frame 73 and the fine filter 74 are taken out to pour the dust out of the U-shaped frame 73.

[0042] Reference Figure 7 and Fig.10A driving mechanism for driving the drainage assembly to slide is provided in the box seat 21, and the driving mechanism includes a servo motor 25. Two support rods 22 are installed between the two opposing sides of the box seat 21, and a slider 23 is slidably installed between the two support rods 22. A screw rod 24 is rotatably installed in the box seat 21, and the screw rod 24 is threadedly connected to the slider 23. The servo motor 25 is fixedly installed on one side outer wall of the box seat 21, and the output shaft of the servo motor 25 is fixedly connected to the shaft body of the screw rod 24 through a coupling. Two plug-in blocks 67 are provided at the bottom end of the exhaust box 61, and the plug-in blocks 67 are connected to the slider. The block 23 is set through, and the plug-in block 67 is fixedly connected to the slider 23 by bolts. The servo motor 25 drives the screw 24 to rotate, driving the slider 23 and the exhaust box 61 to slide synchronously between the two support rods 22. The exhaust box 61 is in a negative pressure state, and the airflow carries the dust on the coarse filter 2 into the exhaust box 61. The roller brush 64 rotates to brush the lower surface of the coarse filter 2 to accelerate the separation of the dust from the coarse filter 2. The comb teeth 65 clean the dust attached to the roller brush 64, and the dust separates from the roller brush 64 and enters the exhaust box 61, thereby improving the cleaning efficiency and effect of the coarse filter 2.

[0043] The working principle and use process of the present invention are as follows: when the air filter device is running, the electric push rod 48 drives the sealing plate 46 and the second drainage pipe 45 to move upward synchronously, the second drainage pipe 45 blocks the drainage hole 47 on the first drainage pipe 44, and the drainage hole 47 on the second drainage pipe 45 is located above the partition 5, the forward and reverse fan 43 draws air outside the casing 1 into the casing 1, and passes through the box seat 21, the coarse filter 2, the square tube 42, the first drainage pipe 44 in the dust collecting chamber, the drainage hole 47 on the second drainage pipe 45, the filter element 3 and the air outlet plate 13 to be discharged from the casing 1 in sequence. When the air filter device cleans the coarse filter, the electric push rod 48 drives the sealing plate 46 and the second drainage pipe 45 to move upward synchronously, the second drainage pipe 45 blocks the drainage hole 47 on the first drainage pipe 44, and the drainage hole 47 on the second drainage pipe 45 is located above the partition 5, the forward and reverse fan 43 draws air outside the casing 1 into the casing 1, and passes through the box seat 21, the coarse filter 2, the square tube 42, the first drainage pipe 44 in the dust collecting chamber, the drainage hole 47 on the second drainage pipe 45, the filter element 3 and the air outlet plate 13 to be discharged from the casing 1 in sequence. 45 moves downward synchronously, the second drainage pipe 45 and the drainage hole 47 on the first drainage pipe 44 overlap, and the drainage hole 47 is located below the partition 5, and the forward and reverse rotating fans 43 draw the air outside the casing 1 into the casing 1, and the airflow flows out from the exhaust box 61, the bent pipe 62, the telescopic pipe 63, the dust collecting assembly in the dust collecting chamber, the fine filter 74, the overlapping drainage holes 47, the first drainage pipe 44, the square tube 42 and the coarse filter 2 in sequence, and the filter 2 is reversely flushed. At the same time, the roller brush 64 rotates to brush the lower surface of the coarse filter 2 to accelerate the separation of dust from the coarse filter 2, and the comb teeth 65 clean the dust attached to the roller brush 64, and the dust separates from the roller brush 64 and enters the exhaust box 61.

[0044] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An air filter device with a filter screen self-cleaning function, comprising a housing (1), a coarse filter screen (2), a filter element (3), a support plate (4) and a partition plate (5), characterized in that: The coarse filter (2), the support plate (4), the partition plate (5) and the filter element (3) are all installed in the casing (1) and are arranged from bottom to top. A limiting structure for fixing the filter element (3) is arranged in the casing (1). A base (12) is arranged at the bottom end of the casing (1). An air outlet plate (13) is arranged at the top end of the casing (1). An air exhaust component is arranged between the support plate (4) and the coarse filter (2). An air flow adjustment component is arranged between the support plate (4) and the partition plate (5). A dust collecting chamber is formed between the support plate (4), the partition plate (5) and the casing (1). The casing (1) An open opening is provided on one side of the housing (1), a pull-out plate (14) is provided on the open opening of the housing (1), a bent rod (15) is provided on the side of the pull-out plate (14) away from the housing (1), a dust collecting assembly is provided on the inner wall of the pull-out plate (14), a box seat (21) is provided at the top end of the base (12), the top end of the box seat (21) is fixedly connected to the coarse filter (2) by bolts, a drainage assembly for cleaning the coarse filter (2) is provided in the box seat (21), the drainage assembly is in communication with the dust collecting chamber, and a driving mechanism for driving the drainage assembly to slide is provided in the box seat (21); The exhaust assembly comprises a forward and reverse rotating fan (43); a square tube (42) is fixedly mounted on the bottom end of the support plate (4); a rubber layer is arranged on the bottom end of the square tube (42); the bottom end of the square tube (42) is fitted with the top end of the box seat (21); the forward and reverse rotating fan (43) is mounted on the bottom end of the support plate (4); and the coarse filter (2) and the forward and reverse rotating fan (43) are both located in the square tube (42); The airflow adjustment component comprises a first drainage tube (44) and a second drainage tube (45), wherein the first drainage tube (44) is fixedly and installed through the top of the support plate (4), the second drainage tube (45) is slidably sleeved on the outer wall of the first drainage tube (44), the second drainage tube (45) is penetrated and slidably connected to the partition (5), the side walls of the second drainage tube (45) and the first drainage tube (44) are both provided with four drainage holes (47) of the same aperture, the distance between the drainage holes (47) and the partition (5) is smaller than the distance between the drainage holes (47) and the support plate (4), a sealing plate (46) is fixedly installed at the top of the second drainage tube (45), the sealing plate (46) is located above the partition (5), an electric push rod (48) is fixedly installed at the top of the support plate (4), the electric push rod (48) is located on the side of the support plate (4) away from the pull-out plate (14), and the movable end of the electric push rod (48) is fixedly connected to the bottom end of the sealing plate (46); The drainage component comprises an exhaust box (61), both ends of the exhaust box (61) are provided with interconnected curved pipes (62), the curved pipes (62) penetrate the box seat (21), one end of the curved pipe (62) away from the exhaust box (61) is connected with a telescopic pipe (63), the top smooth section of the telescopic pipe (63) penetrates and is fixedly connected to the support plate (4), a roller brush (64) is rotatably mounted on the top of the exhaust box (61), the roller brush (64) matches the coarse filter (2), comb teeth (65) are provided in the middle of the exhaust box (61), the comb teeth (65) match the bristles of the roller brush (64), and slide grooves (66) are provided on opposite sides of the box seat (21), the slide grooves (66) match the adjacent curved pipes (62).

2. The air filter device with filter self-cleaning function according to claim 1, characterized in that: The limiting structure comprises a mounting plate (31), the mounting plate (31) being mounted in the casing (1), a support sleeve (32) being arranged at the top end of the mounting plate (31), the support sleeve (32) being sleeve-connected with the filter element (3), two studs (33) being arranged through the top end of the support sleeve (32), the studs (33) being threadedly connected with an eccentric disk (34) for pressing the filter element (3), two first folding plates (35) being mounted at the top end of the mounting plate (31) by means of bolts, the vertical sections of the first folding plates (35) being fixedly connected to the casing (1) by means of bolts.

3. The air filter device with filter self-cleaning function according to claim 1, characterized in that: Two second folding plates (41) are mounted on the bottom end of the support plate (4) via bolts, and the vertical sections of the second folding plates (41) are fixedly connected to the housing (1) via bolts.

4. The air filter device with filter self-cleaning function according to claim 1, characterized in that: The dust collecting assembly comprises a U-shaped side plate (71), a U-shaped bottom plate (72) and a U-shaped frame (73); the U-shaped bottom plate (72) is fixedly mounted on the bottom end of the U-shaped side plate (71); the U-shaped frame (73) is fixedly mounted on the top end of the U-shaped side plate (71); the U-shaped bottom plate (72) and the U-shaped frame (73) are both provided with a clamping groove on the sides facing each other; a fine filter (74) is installed between the U-shaped side plate (71), the U-shaped bottom plate (72) and the U-shaped frame (73) via the clamping groove; the top end of the U-shaped bottom plate (72) is provided with two air inlet holes (75); the air inlet holes (75) match the telescopic tube (63); the inner wall of the pull-out plate (14) is provided with two convex plates (76); the convex plates (76) are fixedly connected to the U-shaped side plate (71).

5. The air filter device with filter self-cleaning function according to claim 1, characterized in that: The driving mechanism comprises a servo motor (25), two support rods (22) are installed between the two opposing sides of the box seat (21), a slider (23) is slidably installed between the two support rods (22), a screw rod (24) is rotatably installed in the box seat (21), the screw rod (24) and the slider (23) are threadedly connected, the servo motor (25) is fixedly installed on an outer wall of one side of the box seat (21), the output shaft of the servo motor (25) is fixedly connected to the shaft body of the screw rod (24) through a coupling, and two plug-in blocks (67) are provided at the bottom end of the exhaust box (61), the plug-in blocks (67) and the slider (23) are arranged to penetrate each other, and the plug-in blocks (67) and the slider (23) are fixedly connected by bolts.

6. The air filter device with filter self-cleaning function according to claim 1, characterized in that: The open wall of the housing (1) is provided with a rubber pad matching the pull-out plate (14), and positioning blocks (16) are fixedly mounted on the inner walls on both sides facing each other, and the positioning blocks (16) are fixedly connected to the pull-out plate (14) by bolts.

7. The air filter device with filter self-cleaning function according to claim 1, characterized in that: A display screen (11) is provided on a side of the housing (1) away from the drawer plate (14), and four universal pulleys (17) are provided at the bottom end of the base (12), wherein a self-locking structure is provided inside the universal pulleys (17).

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