Air filter

Abstract

The utility model belongs to the technical field of filters, and particularly relates to an air filter which comprises a movable base, a filter body is fixedly mounted at the upper end of the movable base, a filter plate is fixedly mounted on the inner side of the filter body, a movable plate is arranged on the side of the filter surface of the filter plate, and an extrusion mechanism is arranged on the inner side of the movable plate. Mounting mechanisms are symmetrically arranged on the inner side of the extrusion mechanism, a cleaning brush is movably mounted on the inner side of the extrusion mechanism through the mounting mechanisms, and a limiting mechanism is fixedly mounted on the outer side of the extrusion mechanism. By adopting the structure, the mounting frame slides on the inner side of the mounting groove of the movable plate through the end part, and meanwhile, the mounting frame is connected with the connecting rod sleeved with the spring, so that the brush surface of the cleaning brush on the mounting frame is better attached to the filtering surface of the filtering plate under the action of the limiting block; and the cleaning effect is not easily influenced by aging and abrasion.

Description

Technical Field

[0001] The utility model belongs to the technical field of filters, and in particular relates to an air filter. Background Art

[0002] An air purifier is mainly composed of two parts: a filter element and a shell. The basic requirements are high filtration efficiency, low flow resistance and long-term continuous use to reduce the cost of later consumables.

[0003] For example, Chinese utility model patent publication number CN216223405U discloses an air filter, including a filter body, a cleaning mechanism is arranged inside the filter body, a dust collecting assembly is arranged on the front of the filter body, and a movable mechanism is arranged at the bottom of the filter body.

[0004] The above-mentioned air filter still has certain deficiencies in actual use and operation. For example, the motor drives the screw rod to rotate, so that the horizontal plate connected to the outer thread slides, and the cleaning brush on the horizontal plate can clean the filter surface of the filter plate to make the filter filter efficiently. However, in actual use, since the cleaning brush is fixedly installed on the horizontal plate, it is inconvenient to replace it with the aging of the cleaning brush and the wear of the filter plate. In addition, the loss of the cleaning brush will also affect the contact effect between the brush surface and the filter plate, resulting in the brush part of the cleaning brush being unable to better stick to the filter surface of the filter plate for cleaning in the later use. Utility Model Content

[0005] The utility model aims to provide an air filter, aiming to solve one of the technical problems existing in the prior art.

[0006] To achieve the above-mentioned purpose, an air filter provided by an embodiment of the utility model comprises a movable base, a filter body is fixedly mounted on the upper end of the movable base, a filter plate is fixedly mounted on the inner side of the filter body, a movable plate is arranged on the side of the filter surface of the filter plate, a squeezing mechanism is arranged on the inner side of the movable plate, a mounting mechanism is symmetrically arranged on the inner side of the squeezing mechanism, a cleaning brush is movably mounted on the inner side of the squeezing mechanism through the mounting mechanism, and a limiting mechanism is fixedly mounted on the outer side of the squeezing mechanism;

[0007] Wherein, the squeezing mechanism comprises a mounting frame and a mounting slot; the mounting slot is arranged on a side of the movable plate facing the filter surface of the filter plate, the side of the mounting frame away from the filter plate is slidably connected to the inner side of the mounting slot, the mounting mechanism is symmetrically arranged on the upper side of the mounting frame, the cleaning brush is plugged into the inner side of the upper end of the mounting frame, a connecting rod is symmetrically fixedly installed on the side of the mounting frame away from the cleaning brush, a spring is sleeved on one end of the connecting rod close to the mounting frame, the end of the connecting rod away from the mounting frame slides through the movable plate to be fixedly installed with a limited block, and the limiting mechanism is arranged on the side of the mounting frame facing the mounting slot;

[0008] Wherein, the limiting mechanism includes a rectangular rod; one end of the rectangular rod is fixedly connected to the side of the mounting frame away from the cleaning brush, the other end of the rectangular rod slides through the movable plate and is fixedly installed with a pull handle, a limiting hole is provided at the upper end of the rectangular rod, and a second hand-tightening bolt is threadedly connected to the upper end of the movable plate, and the screw end of the second hand-tightening bolt is used to adapt and be inserted into the limiting hole.

[0009] Optionally, a slide groove is provided on a side of the mounting frame close to the cleaning brush, and a slider is provided on a side of the cleaning brush close to the mounting frame, and the cleaning brush is adapted to be inserted into the slide groove of the mounting frame through the slider.

[0010] Optionally, the mounting mechanism includes a first connecting block and a second connecting block; the first connecting block is fixedly connected to the upper end of the mounting frame, the second connecting block is fixedly connected to the upper end of the cleaning brush, and a first hand-tightening bolt is provided on the inner side of the first connecting block, and the screw end of the first hand-tightening bolt passes through the first connecting block and is screwed to the second connecting block.

[0011] Optionally, a through hole is opened on the inner side of the first connecting block, and the screw end of the first hand-tightening bolt passes through the through hole and is screwed to the threaded hole on the second connecting block.

[0012] Optionally, at least one limiting groove is provided on both opposite sides of the installation groove, and at least one sliding block is provided on both opposite ends of the installation frame, and each sliding block is slidably connected in one of the limiting grooves.

[0013] Optionally, a screw hole is provided on the inner side of the upper end of the movable plate, and the screw end of the second hand-tightening bolt is threadedly connected in the screw hole.

[0014] Optionally, a slot is provided on the inner side of the filter body, a collection box is plugged into the inner side of the slot, and the collection box is arranged below the filter surface of the filter plate.

[0015] Optionally, both ends of the filter body are provided with an air inlet hood and an air outlet hood, and the air inlet hood and the air outlet hood both correspond to the filter surface of the filter plate.

[0016] Optionally, one side of the air inlet hood and the air outlet hood are hinged to the outer side wall of one side of the filter body through a hinge, and the other side of the air inlet hood and the air outlet hood are detachably screwed to the outer side wall of the other side of the filter body through screws.

[0017] Compared with the prior art, the above one or more technical solutions in the air filter provided by the embodiment of the utility model have at least one of the following technical effects:

[0018] 1. The elasticity of the spring drives the brush surface of the cleaning brush on the mounting frame to be in close contact with the filter surface of the filter plate. Even if the bristles of the cleaning brush become shorter due to wear, the cleaning brush moves forward driven by the elasticity of the spring and always keeps in contact with the filter surface of the filter plate, thus achieving a good cleaning effect.

[0019] 2. When the cleaning brush needs to be replaced, you only need to use the handle to pull the rectangular rod so that the rectangular rod drives the mounting frame to slide toward one side of the movable plate. At this time, the spring is compressed, and then the second hand-tightening bolt is rotated so that the screw end of the second hand-tightening bolt is inserted into the limiting hole on the rectangular rod for limiting. In this way, the mounting frame with the cleaning brush no longer contacts the filter surface of the filter plate, making it convenient to disassemble the cleaning brush on the mounting frame.

[0020] 3. When disassembling, you only need to operate the first hand-tightening bolt at the first connecting block of the mounting frame to separate the first hand-tightening bolt from the second connecting block on the cleaning brush, and then pull the cleaning brush out from the sliding slot of the mounting frame from bottom to top, so that the cleaning brush can be easily disassembled and maintained. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is a schematic structural diagram of the air filter of the utility model.

[0023] Figure 2 It is a structural schematic diagram of the filter body of the utility model.

[0024] Figure 3 This is a schematic diagram of the first partial structure of the air filter of the utility model.

[0025] Figure 4 This is a second partial structural schematic diagram of the air filter of the utility model.

[0026] Among them, the reference numerals in the figure are:

[0027] 1. Mobile base; 2. Filter body; 3. Filter plate; 4. Movable plate; 41. Screw sleeve; 42. Slide hole; 5. Slot; 6. Collection box; 10. Cleaning brush; 11. Slide groove; 12. Screw hole; 13. Through hole; 14. Limiting groove; 15. Inlet cover; 16. Outlet cover;

[0028] 7. Extrusion mechanism; 701. Mounting frame; 702. Limiting block; 703. Connecting rod; 704. Mounting slot; 705. Spring; 706. Sliding block;

[0029] 8. Installation mechanism; 801. First connection block; 802. Second connection block; 803. First hand-tightening bolt;

[0030] 9. Limiting mechanism; 901. Pull handle; 902. Rectangular rod; 903. Second hand tightening bolt; 904. Limiting hole. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0032] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0034] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0035] In one embodiment of the present invention, referring to Figure 1-Figure 4, an air filter is provided, comprising a mobile base 1.

[0036] Among them, a filter body 2 is fixedly installed on the upper end of the movable base 1, a filter plate 3 is fixedly installed on the inner side of the filter body 2, a movable plate 4 is provided on the side of the filter surface of the filter plate 3, an extrusion mechanism 7 is provided on the inner side of the movable plate 4, a mounting mechanism 8 is symmetrically provided on the inner side of the extrusion mechanism 7, a cleaning brush 10 is movably installed on the inner side of the extrusion mechanism 7 through the mounting mechanism 8, and a limiting mechanism 9 is fixedly installed on the outer side of the extrusion mechanism 7.

[0037] Among them, an air inlet hood 15 and an air outlet hood 16 are respectively provided at both ends of the filter body 2, and the air inlet hood 15 and the air outlet hood 16 correspond to the filter surface of the filter plate 3, which is convenient for the filter plate 3 to filter the air entering it. One side of the air inlet hood 15 and the air outlet hood 16 are hinged to the outer side wall of one side of the filter body 2 through a hinge, and the other side of the air inlet hood 15 and the air outlet hood 16 are detachably screwed to the outer side wall of the other side of the filter body 2 through screws, which is convenient for opening the air inlet hood 15 and the air outlet hood 16 to maintain the interior of the filter body 2.

[0038] The two ends of the movable plate 4 are respectively provided with a screw sleeve 41 (for example, a nut) and a slide hole 42, one inner side of the filter body 2 is rotatably connected with a transmission screw, the other inner side of the filter body 2 is provided with a slide bar, and the transmission screw is vertically arranged, the screw sleeve 41 is threadedly connected to the transmission screw, and the slide hole 42 is slidably connected to the slide bar. The transmission screw is driven to rotate by a driving motor, thereby driving the screw sleeve to move up and down along the transmission screw, and then driving the movable plate 4 to move up and down.

[0039] Among them, the extrusion mechanism 7 includes a mounting frame 701 and a mounting groove 704; the mounting groove 704 is opened on the side of the movable plate 4 facing the filter surface of the filter plate 3, and the side of the mounting frame 701 away from the filter plate 3 is slidably connected to the inner side of the mounting groove 704, and the mounting mechanism 8 is symmetrically arranged on the upper side of the mounting frame 701, and the cleaning brush 10 is inserted into the inner side of the upper end of the mounting frame 701, and the side of the mounting frame 701 away from the cleaning brush 10 is symmetrically fixed with a connecting rod 703, and the end of the connecting rod 703 close to the mounting frame 701 is sleeved with a spring 705, and the end of the connecting rod 703 away from the mounting frame 701 slides through the movable plate 4 to fix the limited block 702.

[0040] Among them, the limiting mechanism 9 is arranged on the side of the mounting frame 701 facing the mounting groove 704, and the mounting frame 701 slides on the inner side of the mounting groove 704 of the movable plate 4 through the end portion. At the same time, the mounting frame 701 is connected to a connecting rod 703 with a spring 705. The spring 705 elastically drives the brush surface of the cleaning brush 10 on the mounting frame 701 to be tightly attached to the filtering surface of the filter plate 3. Even if the bristles of the cleaning brush become shorter due to wear, the cleaning brush is driven forward by the elasticity of the spring 705 to always keep in contact with the filtering surface of the filter plate 3, thereby improving the cleaning effect of the cleaning brush.

[0041] Among them, the limiting mechanism 9 includes a rectangular rod 902; one end of the rectangular rod 902 is fixedly connected to the side of the mounting frame 701 away from the cleaning brush 10, and the other end of the rectangular rod 902 slides through the movable plate 4 and is fixedly installed with a handle 901. A limiting hole 904 is provided at the upper end of the rectangular rod 902, and a second hand-tightening bolt 903 is threadedly connected to the upper end of the movable plate 4, and the screw end of the second hand-tightening bolt 903 is used to adapt and be inserted into the limiting hole 904.

[0042] Compared with the prior art, the above one or more technical solutions in the air filter provided by the embodiment of the utility model have at least one of the following technical effects:

[0043] The elasticity of the spring drives the brush surface of the cleaning brush on the mounting frame to be in close contact with the filtering surface of the filter plate. Even if the bristles of the cleaning brush become shorter due to wear, the cleaning brush moves forward driven by the elasticity of the spring and always keeps in contact with the filtering surface of the filter plate, thereby improving the cleaning effect of the cleaning brush.

[0044] When the cleaning brush needs to be replaced, it is only necessary to use the handle to pull the rectangular rod so that the rectangular rod drives the mounting bracket to slide toward one side of the movable plate. At this time, the spring is compressed, and then the second hand-tightening bolt is rotated so that the screw end of the second hand-tightening bolt is inserted into the limiting hole on the rectangular rod for limiting position, so that the mounting bracket with the cleaning brush can no longer contact the filter surface of the filter plate, thereby facilitating the removal of the cleaning brush from the mounting bracket.

[0045] When disassembling, you only need to operate the first hand-tightening bolt at the first connecting block of the mounting frame to separate the first hand-tightening bolt from the second connecting block on the cleaning brush, and then pull the cleaning brush out from the sliding slot of the mounting frame from bottom to top, so that the cleaning brush can be easily disassembled and maintained.

[0046] In another embodiment of the present invention, the mounting mechanism 8 includes a first connecting block 801 and a second connecting block 802; the first connecting block 801 is fixedly connected to the upper end of the mounting frame 701, and the second connecting block 802 is fixedly connected to the upper end of the cleaning brush 10. A first hand-tightening bolt 803 is provided on the inner side of the first connecting block 801, and the screw end of the first hand-tightening bolt 803 passes through the first connecting block 801 and is screwed to the second connecting block 802; when the cleaning brush 10 needs to be replaced, it is only necessary to use the handle to pull the rectangular rod 902, so that the rectangular rod 902 drives the mounting frame 701 to slide toward one side of the movable plate 4, at which time the spring 705 is compressed and then rotated. After the second hand-tightening bolt 903 is tightened, the screw end of the second hand-tightening bolt 903 is inserted into the limiting hole 904 on the rectangular rod 902 for limiting, so that the cleaning brush 10 on the mounting bracket 701 is no longer in contact with the filter surface of the filter plate 3, thereby facilitating the removal of the cleaning brush 10 from the mounting bracket 701. During the disassembly process, it is only necessary to operate the first hand-tightening bolt 803 at the first connecting block 801 of the mounting bracket 701 to separate the first hand-tightening bolt 803 from the second connecting block 802 on the cleaning brush 10, and then pull the cleaning brush 10 out from the slide slot 11 of the mounting bracket 701 from bottom to top, thereby facilitating the disassembly and maintenance of the cleaning brush 10.

[0047] In another embodiment of the present invention, reference Figure 3 A slide groove 11 is provided on one side of the mounting frame 701 close to the cleaning brush 10, and a slider is provided on one side of the cleaning brush 10 close to the mounting frame 701. The cleaning brush 10 is inserted into the slide groove 11 of the mounting frame 701 through the slider, so that the cleaning brush 10 is conveniently positioned and installed on the mounting frame 701; the side grooves of the slide groove 11 can limit the slider of the cleaning brush 10, so that the cleaning brush 10 can only be loaded into the slide groove 11 from top to bottom or taken out from bottom to top.

[0048] In another embodiment of the present invention, reference Figure 4 A through hole 13 is opened on the inner side of the first connecting block 801, and the screw end of the first hand-tightening bolt 803 passes through the through hole 13 and is screwed to the threaded hole on the second connecting block 802 to fix the first connecting block 801 and the second connecting block 802.

[0049] In another embodiment of the present invention, reference Figure 3 At least one limiting groove 14 is provided on both opposite sides of the installation groove 704, and at least one sliding block 706 is provided on both opposite ends of the installation frame 701. Each sliding block 706 is slidably connected in a limiting groove 14, so that the installation groove 704 slides in the limiting groove 14, which is convenient for limiting the installation frame 701.

[0050] In another embodiment of the present invention, reference Figure 3A screw hole 12 is provided on the inner side of the upper end of the movable plate 4, and the screw end of the second hand-tightening bolt 903 is threadedly connected to the screw hole 12. The screw hole 12 on the movable plate 4 is used to facilitate the second hand-tightening bolt 903 to be threadedly connected to the movable plate 4, so that the screw end of the second hand-tightening bolt 903 is adapted and plugged into the limiting hole 904 on the rectangular rod 902; during use, the second hand-tightening bolt 903 does not contact the limiting hole 904, and the second hand-tightening bolt 903 is only inserted into the limiting hole 904 for limiting when the cleaning brush 10 is disassembled.

[0051] In another embodiment of the present invention, reference Figure 2 A slot 5 is provided on the inner side of the filter body 2, a collection box 6 is inserted into the inner side of the slot 5, and the collection box 6 is arranged below the filter surface of the filter plate 3. The dust can be conveniently collected by inserting the collection box 6 into the slot 5 in the filter body 2.

[0052] The use principle and advantages of the air filter of this utility model:

[0053] During use, the driving motor drives the transmission screw to rotate, thereby driving the screw sleeve to move up and down along the transmission screw, and then driving the cleaning brush 10 on the movable plate 4 to move up and down. When moving up and down, the bristles of the cleaning brush 10 are close to the filtering surface of the filter plate 3, thereby cleaning the filtering surface of the filter plate 3; at the same time, the spring 705 elastically drives the brush surface of the cleaning brush 10 on the mounting frame 701 to be close to the filtering surface of the filter plate 3. Even if the bristles of the cleaning brush become shorter due to wear, the cleaning brush is driven forward by the elasticity of the spring 705 to always keep in contact with the filtering surface of the filter plate 3, thereby improving the cleaning effect of the cleaning brush.

[0054] When the cleaning brush 10 needs to be replaced, it is only necessary to use the handle to pull the rectangular rod 902 so that the rectangular rod 902 drives the mounting bracket 701 to slide toward the side of the movable plate 4. At this time, the spring 705 is compressed. Then, the second hand-tightening bolt 903 is rotated so that the screw end of the second hand-tightening bolt 903 is inserted into the limiting hole 904 on the rectangular rod 902 for limiting. In this way, the mounting bracket 701 with the cleaning brush 10 can no longer contact the filter surface of the filter plate 3. Then, the first hand-tightening bolt 803 at the first connecting block 801 of the mounting bracket 701 is operated to separate the first hand-tightening bolt 803 from the second connecting block 802 on the cleaning brush 10. Then, the cleaning brush 10 can be pulled out from the slide slot 11 of the mounting bracket 701 from bottom to top.

[0055] The rest of this embodiment is the same as the first embodiment. The features not explained in this embodiment are all based on the explanations in the first embodiment and will not be described in detail here.

[0056] The above content is a further detailed description of the utility model in combination with specific preferred implementation methods, and it cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, its architecture can be flexible and can derive a series of products. Just making a few simple deductions or substitutions should be regarded as belonging to the patent protection scope of the utility model determined by the submitted claims.

Claims

1. An air filter, comprising a mobile base, characterized in that: A filter body is fixedly mounted on the upper end of the movable base, a filter plate is fixedly mounted on the inner side of the filter body, a movable plate is arranged on the side of the filter surface of the filter plate, a squeezing mechanism is arranged on the inner side of the movable plate, a mounting mechanism is symmetrically arranged on the inner side of the squeezing mechanism, a cleaning brush is movably mounted on the inner side of the squeezing mechanism through the mounting mechanism, and a limiting mechanism is fixedly mounted on the outer side of the squeezing mechanism; Wherein, the squeezing mechanism comprises a mounting frame and a mounting slot; the mounting slot is arranged on a side of the movable plate facing the filter surface of the filter plate, the side of the mounting frame away from the filter plate is slidably connected to the inner side of the mounting slot, the mounting mechanism is symmetrically arranged on the upper side of the mounting frame, the cleaning brush is plugged into the inner side of the upper end of the mounting frame, a connecting rod is symmetrically fixedly installed on the side of the mounting frame away from the cleaning brush, a spring is sleeved on one end of the connecting rod close to the mounting frame, the end of the connecting rod away from the mounting frame slides through the movable plate to be fixedly installed with a limited block, and the limiting mechanism is arranged on the side of the mounting frame facing the mounting slot; Wherein, the limiting mechanism includes a rectangular rod; one end of the rectangular rod is fixedly connected to the side of the mounting frame away from the cleaning brush, the other end of the rectangular rod slides through the movable plate and is fixedly installed with a pull handle, a limiting hole is provided at the upper end of the rectangular rod, and a second hand-tightening bolt is threadedly connected to the upper end of the movable plate, and the screw end of the second hand-tightening bolt is used to adapt and be inserted into the limiting hole.

2. The air filter according to claim 1, characterized in that: A slide groove is provided on one side of the mounting frame close to the cleaning brush, and a slider is provided on one side of the cleaning brush close to the mounting frame. The cleaning brush is adapted to be inserted into the slide groove of the mounting frame through the slider.

3. The air filter according to claim 1, characterized in that: The mounting mechanism includes a first connecting block and a second connecting block; the first connecting block is fixedly connected to the upper end of the mounting frame, the second connecting block is fixedly connected to the upper end of the cleaning brush, a first hand-tightening bolt is provided on the inner side of the first connecting block, and the screw end of the first hand-tightening bolt passes through the first connecting block and is screwed to the second connecting block.

4. The air filter according to claim 3, characterized in that: A through hole is provided on the inner side of the first connection block, and the screw end of the first hand-tightened bolt passes through the through hole and is screwed to the threaded hole on the second connection block.

5. The air filter according to claim 1, characterized in that: At least one limiting groove is disposed on both opposite sides of the installation groove, and at least one sliding block is disposed on both opposite ends of the installation frame, and each sliding block is slidably connected in one of the limiting grooves.

6. The air filter according to claim 1, characterized in that: A screw hole is provided on the inner side of the upper end of the movable plate, and the screw rod end of the second hand-tightening bolt is threadedly connected in the screw hole.

7. The air filter according to claim 1, characterized in that: A slot is provided on the inner side of the filter body, a collecting box is plugged into the inner side of the slot, and the collecting box is arranged below the filter surface of the filter plate.

8. The air filter according to claim 1, characterized in that: An air inlet hood and an air outlet hood are provided at both ends of the filter body, and the air inlet hood and the air outlet hood correspond to the filter surface of the filter plate.

9. The air filter according to claim 8, characterized in that: One side of the air inlet hood and the air outlet hood are both hinged to one side outer wall of the filter body through hinges, and the other side of the air inlet hood and the air outlet hood are detachably screwed to the other side outer wall of the filter body through screws.

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