An air filter that is easy to install

Abstract

This invention belongs to the field of air filter technology, specifically relating to an easy-to-install air filter. The air filter includes a mounting frame and multiple filter bags. The top of the mounting frame has multiple equidistantly spaced insertion slots. During installation, the top opening of the filter bag is first inserted into the insertion slot. With the help of pre-positioning components, the top opening of the filter bag is pre-fixed in the insertion slot. Then, by manually pulling the four collars on each individual insertion frame, the collars switch from their initial position on the first positioning post to their position outside the corresponding second positioning post. At this time, the steel wire ropes pull the expansion plates. The design of the second weakening part, the third weakening part, and multiple bottom areas of the expansion plate all insert into the insertion bag, thereby causing the two expansion plates to open the top opening of the filter bag to a predetermined size.

Description

Technical Field

[0001] This invention belongs to the field of air filter technology, and specifically relates to an air filter that is easy to install. Background Technology

[0002] Air filters are core components in industrial dust removal, cleanroom, and building air purification systems. Their performance directly affects filtration efficiency, system energy consumption, and operation and maintenance costs. Bag filters are widely used due to their large dust holding capacity and relatively low air resistance.

[0003] In existing technologies, side-mounted bag filters are one of the mainstream structural forms. A typical installation method is as follows: the filter mainly consists of a rigid mounting frame and multiple filter bags arranged side-by-side. During installation, the operator must first manually slip the sewn-on opening at the top of the filter bag onto the outside of an independent insert frame (or "frame" or "keel"). Then, the insert frame with the filter bag inserted is inserted into the slot of the mounting frame. To secure the filter bag and ensure a seal, a separate locking device (such as metal or plastic clamps, pressure strips, etc.) is typically used. Special tools are required to roll, tap, or bolt the connection between adjacent filter bags, thereby pressing the filter bag's opening between the insert frame and the mounting frame.

[0004] Although the above structure solved the basic problem of fixing the filter bag for a certain period of time, its inherent technical defects have become increasingly prominent in actual application and operation and maintenance:

[0005] The installation and disassembly process is cumbersome and maintenance is inefficient: this fixing method relies on additional locking parts and special tools, making installation and disassembly time-consuming and labor-intensive. Especially when replacing filter bags, operators must carefully release the locking parts, which is not only labor-intensive but also poses safety hazards in high or confined space installation locations, greatly reducing equipment maintenance efficiency and increasing downtime and labor costs.

[0006] There is a risk of secondary contamination during disassembly: The most prominent problem is that during disassembly, after the locking parts are removed, the top opening of the filter bag is left unrestrained and open. At this time, a large amount of dust and pollutants accumulated inside the filter bag are easily "blown out" under the influence of gravity and airflow disturbance, directly exposed to the operating environment.

[0007] Poor filter bag working shape affects filtration performance: During the filtration process, due to the lack of effective internal support, the filter bag is usually in a "collapsed" or "wrinkled" state, unable to be evenly expanded to its predetermined optimal working shape. This leads to two negative effects: First, the effective filtration area cannot be fully expanded, and the actual filtration load is concentrated in some areas, resulting in excessively high local air velocity, increased air resistance, and shortened filter bag life; Second, the collapsed bag makes it easier for dust to clump on the inner surface of the bag, making cleaning difficult, thus reducing overall filtration efficiency and system energy efficiency.

[0008] In summary, there is an urgent need in this field for a novel air filter structure that can fundamentally solve the above problems, enabling rapid and tool-based installation and removal of the filter bag. During removal, it can effectively seal the bag opening to prevent dust from escaping, and in the working state, it can automatically or passively expand the filter bag to a predetermined shape to fully utilize its filtration performance.

[0009] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0010] The purpose of this invention is to provide an air filter that is easy to install, thereby solving the problems of the prior art.

[0011] To achieve the above objectives, the present invention provides the following technical solution:

[0012] An easy-to-install air filter includes a mounting frame and multiple filter bags. The top of the mounting frame has multiple equidistantly spaced embedding slots, each containing a movable embedding frame. Each embedding frame has a insertion groove at its top edge, and a pre-positioning element is installed on the inner wall of the insertion groove. The insertion groove is used to insert the top flange of the filter bag, and the pre-positioning element is used to pre-position the top flange. Multiple equidistant insertion pockets are sewn onto both side walls of each filter bag, and each insertion pocket has an opening at its top. A dustproof disassembly / removal component is also included, mounted on the embedding frame. This component, in conjunction with the pre-positioning element, serves two purposes: firstly, to fix the top flange to the embedding frame and simultaneously, to fix the embedding frame within the embedding slot; and secondly, to open or close the bag opening of the filter bag.

[0013] Preferably, the prepositioning includes multiple equally spaced grooves formed around the inner wall of the insertion groove, and each groove has an integrally formed abutment plate at its inner top wall via a first weakening part. The inner bottom wall of the insertion groove has two symmetrically arranged longitudinal baffles and two symmetrically arranged transverse baffles fixedly connected to it.

[0014] Preferably, the transverse baffle and the longitudinal baffle are vertically distributed, and the bottom ends of the pressing plates are inclined and are movably lapped on the inner side surfaces of the transverse baffle or the longitudinal baffle.

[0015] Preferably, the dust-proof disassembly and assembly member includes spreading plates integrally formed on the tops of the two longitudinal baffles through second weakened parts. The two spreading plates are symmetrically arranged, and the vertical cross-sections of the spreading plates are both in an inverted '丿' shape structure. Third weakened parts are respectively arranged at the bends in the middle of the spreading plates.

[0016] Preferably, a plurality of equidistantly arranged lightweight grooves are respectively arranged at the bottom ends of the spreading plates. Arc chamfers are symmetrically arranged in the bottom end regions between every two adjacent lightweight grooves. The bottom end regions are used to be guided and inserted into the insertion pockets by means of the arc chamfers.

[0017] Preferably, first moving channels are respectively penetrated through the two longitudinal baffles. First toothed plates are movably installed in the first moving channels. The back sides of the two first toothed plates facing each other are fixedly connected to the outer sides of the spreading plates through a plurality of equidistantly arranged first elastic pieces. The vertical cross-sections of the first elastic pieces are both in a W-shaped structure. Second elastic pieces with cross-sections in a Z-shaped structure are fixedly connected to the two side edges of the backs of the two first toothed plates. The ends of the two second elastic pieces away from each other are fixedly connected to the outer sides of the longitudinal baffles through connecting pieces.

[0018] Preferably, second moving channels are respectively penetrated through the two transverse baffles. Second toothed plates are movably installed in the second moving channels. The second toothed plates and the first toothed plates are vertically distributed. Two symmetrically arranged third elastic pieces are fixedly connected to the two side edges of the backs of the two second toothed plates facing each other. The cross-sections of the third elastic pieces are both in a Z-shaped structure. Two symmetrically arranged squeezed blocks are fixedly connected to the backs of the two second toothed plates facing each other. Extrusion inclined surfaces are respectively arranged at the ends of the squeezed blocks away from the second toothed plates. The extrusion inclined surfaces are movably lapped on the outer sides of the spreading plates.

[0019] Preferably, the squeezed blocks are respectively located between two symmetrically arranged third elastic pieces. The ends of the squeezed blocks away from the extrusion inclined surfaces slide in moving grooves formed in the inner walls of the second moving channels.

[0020] Preferably, L-shaped positioning blocks are respectively fixedly connected to the bottom ends of the squeezed blocks. The other ends of the L-shaped positioning blocks movably penetrate through positioning frames, and the other ends of the L-shaped positioning blocks are flush with the outer surface of the positioning frames. Positioning ports adapted to be inserted with the other ends of the L-shaped positioning blocks are respectively arranged on the inner walls of the embedding grooves. Guide inclined surfaces are respectively arranged around the openings of each positioning port.

[0021] Preferably, two symmetrically arranged steel wire ropes are fixed to the inclined surfaces of the two opposing sides of the two expansion plates. The other end of each steel wire rope movably passes through the positioning frame and extends to the top of the embedded frame, and is fixed with a collar. In the initial state, each collar is movably sleeved on the outside of the first positioning post. The bottom end of each first positioning post is fixed to the top of the embedded frame. The vertical cross-section of each first positioning post is T-shaped. Between the two first positioning posts on the same side, there are also two symmetrically arranged second positioning posts fixed to the top of the embedded frame. The shapes of the first positioning posts and the second positioning posts are the same.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The air filter of the present invention is easy to install. During installation, the top opening flange of the filter bag is first inserted into the insertion groove. With the help of the pre-positioning component, the top opening flange of the filter bag can be pre-fixed in the insertion groove. In addition, by manually pulling the four collars provided on each individual embedding frame, the collars are switched from the initial fitting state on the first positioning post to the outer side of the second positioning post on the corresponding side. At this time, the wire rope will pull the expansion plate. With the design of the second weakening part, the third weakening part and the multiple bottom areas of the bottom of the expansion plate being inserted into the insertion bag, the two expansion plates will open the top opening of the filter bag to a predetermined size. This setting can passively open the filter bag opening to a predetermined shape to give full play to its filtration function. In terms of performance, during the opening process of the two expansion plates, the first and second spring plates are used to squeeze the two first toothed plates to move away from each other. As a result, the multiple teeth on the opposite side of the two first toothed plates fix the top opening flange of the filter bag. At the same time, the two side walls of the two expansion plates press against the compression slope on the compressed block during the above-mentioned movement, thereby causing the two second toothed plates to move away from each other. As a result, the multiple teeth on the opposite side of the two second toothed plates also fix the top opening flange of the filter bag. This configuration can further fix the top opening flange of the filter bag while opening the filter bag, ensuring the stability of the installation and greatly improving the efficiency of installing and removing the filter bag from the embedded frame.

[0024] (2) While the top opening flange of the filter bag is further fixed, the squeezed block will simultaneously drive the other end of the L-shaped positioning block at the bottom to be inserted into the positioning hole opened in the inner wall of the embedding groove. Thus, while the top opening flange of the filter bag is opened and fixed, the embedding frame can be quickly locked in the embedding groove, further improving the assembly efficiency.

[0025] (3) When disassembling the filter bag, the collar can be switched and placed on the outside of the first positioning post. Under the reverse rebound force of the first spring, the second spring and the third spring, the two expansion plates can automatically close the bag opening of the filter bag by means of the recovery action of the second weakening part and the third weakening part. At the same time, the locking state of the top opening of the filter bag and the locking state of the embedded frame can be removed. Then, when the filter bag is pulled down, the bottom deformation of the two expansion plates can be used to make the bag opening of the filter bag always in the process of being squeezed and closed during the process of being pulled down, so as to ensure that the bag opening can be effectively closed during disassembly to prevent dust from escaping and polluting the environment. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention after a single filter bag has been removed;

[0028] Figure 3 This is a schematic diagram of the unfolded three-dimensional structure of the embedded slot on the mounting frame of the present invention;

[0029] Figure 4 This is a first-view three-dimensional structural diagram of each component on the embedded frame of the present invention;

[0030] Figure 5 This is a second-view three-dimensional structural diagram of each component on the embedded frame of the present invention;

[0031] Figure 6 This is a three-dimensional structural diagram of each component on the embedded frame of the present invention from a third-view perspective;

[0032] Figure 7 This is a schematic diagram of the unfolded vertical cross-section of the embedded frame and its two supporting plates of the present invention.

[0033] Figure 8 This is a three-dimensional bottom view of the components on the support plate of the present invention;

[0034] Figure 9 This is the present invention. Figure 3 A magnified structural diagram at point A;

[0035] Figure 10 This is the present invention. Figure 6 A magnified structural diagram at point B;

[0036] Figure 11 This is the present invention. Figure 4 A magnified structural diagram at point C;

[0037] Figure 12 This is the present invention. Figure 7 A magnified structural diagram at point D;

[0038] Explanation of key figure labels:

[0039] 1. Mounting frame; 11. Embedding slot; 12. Embedding frame; 121. Insertion slot; 122. Groove; 123. First weakening part; 124. Anchor plate; 125. Transverse baffle; 126. Positioning frame; 2. Filter bag; 21. Insertion bag; 3. Dustproof disassembly / assembly component; 31. Longitudinal baffle; 32. Second weakening part; 33. Spreading plate; 331. Third weakening part; 34. Lightweight groove; 35. First spring; 36. 361. First moving channel; 37. Second spring piece; 371. Connecting piece; 38. Steel wire rope; 39. Second toothed plate; 391. Second moving channel; 310. Third spring piece; 311. Pressed block; 3111. Pressing slope; 312. Moving groove; 313. L-shaped positioning block; 314. Positioning port; 3141. Guide slope; 315. Collar; 316. First positioning post; 317. Second positioning post. Detailed Implementation

[0040] The technical solution of this invention patent will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention.

[0041] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] See attached document Figure 1-12An easy-to-install air filter includes an installation frame 1 and multiple filter bags 2. The top of the installation frame 1 has multiple equidistantly arranged embedding slots 11, each embedding frame 12 is movably installed in an embedding slot 11, and an insertion slot 121 is provided at the top edge of the embedding frame 12. A pre-positioning element is installed on the inner wall of the insertion slot 121. The insertion slot 121 is used to insert the top flange of the filter bag 2, and the pre-positioning element is used to pre-position the top flange. Multiple equidistant insertion bags 21 are sewn onto the two side walls of each filter bag 2, and the top of the insertion bag 21 has an opening. A dustproof disassembly component 3 is installed on the embedding frame 12. The dustproof disassembly component 3, together with the pre-positioning element, is used to fix the top flange to the embedding frame 12 and to fix the embedding frame 12 in the embedding slot 11. It is also used to open or close the bag opening of the filter bag 2.

[0044] It is worth noting that the embedded frame 12, including the dustproof disassembly part 3 and the pre-installed part provided on the embedded frame 12, are all made of stainless steel in one piece, which is not easy to rust.

[0045] Furthermore, such as Figure 1-12 As shown, in order to preposition the top opening of the filter bag 2 in the insertion groove 121, the prepositioning includes multiple equally spaced grooves 122 opened around the inner wall of the insertion groove 121. The inner top wall of each groove 122 is integrally formed with a retaining plate 124 through a first weakening part 123. Two symmetrically arranged longitudinal baffles 31 and two symmetrically arranged transverse baffles 125 are fixedly connected to the inner bottom wall of the insertion groove 121. The transverse baffles 125 and the longitudinal baffles 31 are vertically distributed. The bottom ends of the retaining plates 124 are inclined and movably overlap the inner side of the transverse baffles 125 or the longitudinal baffles 31.

[0046] It is worth noting that the bottom of the clamping plate 124 is inclined. When the top opening of the filter bag 2 is turned up and inserted into the insertion groove 121, it will squeeze the clamping plate 124 to deform through the first weakening part 123. With the help of elastic force, the top opening of the filter bag 2 is pre-positioned in the insertion groove 121.

[0047] Furthermore, such as Figure 1-12As shown, in order to be able to expand the opening of the filter bag 2 to a predetermined size state, and at the same time, further lock the flanging of the top opening of the filter bag 2 in the insertion groove 121, and at the same time, fix the embedding frame 12 in the embedding groove 11, a dust-proof disassembly and assembly member 3 is provided, which includes a撑开板 33 integrally formed on the tops of two longitudinal baffles 31 through a second weakened portion 32. The two撑开板 33 are symmetrically arranged. The vertical cross-sections of the撑开板 33 are both in an inverted '丿' shape structure. Third weakened portions 331 are formed by bending in the middle of the撑开板 33. Multiple equally spaced lightweight grooves 34 are provided at the bottom ends of the撑开板 33. Symmetrically arranged arc chamfers are provided in the bottom end regions between every two adjacent lightweight grooves 34. The bottom end regions are used to guide and insert into the insertion pocket 21 by means of the arc chamfers. First moving channels 361 are penetrated through both of the two longitudinal baffles 31. First tooth plates 36 are movably installed in the first moving channels 361. On the back sides of the opposite sides of the two first tooth plates 36, they are fixedly connected to the outside of the撑开板 33 through a plurality of equally spaced first elastic pieces 35. The vertical cross-sections of the first elastic pieces 35 are both in a W-shaped structure. On the back sides of the two sides of the edges of the two first tooth plates 36, second elastic pieces 37 with cross-sections in a Z-shaped structure are fixedly connected. The opposite ends of the two second elastic pieces 37 are fixedly connected to the outside of the longitudinal baffle 31 through connecting pieces 371. Second moving channels 391 are penetrated through both of the two transverse baffles 125. Second tooth plates 39 are movably installed in the second moving channels 391. The second tooth plates 39 and the first tooth plates 36 are vertically distributed. On the back sides of the opposite sides of the two second tooth plates 39, two symmetrically arranged third elastic pieces 310 are fixedly connected. The cross-sections of the third elastic pieces 310 are both in a Z-shaped structure. On the back sides of the opposite sides of the two second tooth plates 39, two symmetrically arranged squeezed blocks 311 are fixedly connected. On the ends of the squeezed blocks 311 far from the second tooth plates 39, extrusion inclined surfaces 3111 are provided. The extrusion inclined surfaces 3111 are movably lapped on the outside of the撑开板 33. The squeezed blocks 311 are both located between two symmetrically arranged third elastic pieces 310. On the ends of the squeezed blocks 311 far from the extrusion inclined surfaces 3111, they slide in the moving grooves 312 provided on the inner walls of the second moving channels 391. L-shaped positioning blocks 313 are fixedly connected to the bottom ends of the squeezed blocks 311. The other ends of the L-shaped positioning blocks 313 movably penetrate through the positioning frame 126. The other ends of the L-shaped positioning blocks 313 are flush with the outer surface of the positioning frame 126. Positioning ports 314 adapted to be inserted with the other ends of the L-shaped positioning blocks 313 are provided on the inner walls of the embedding grooves 11. Guide inclined surfaces 3141 are provided around the openings of each positioning port 314. On the inclined surfaces on the opposite sides of the two撑开板 33, two symmetrically arranged steel wire ropes 38 are fixedly connected. The other ends of the steel wire ropes 38 movably penetrate through the positioning frame 126, and then movably extend to the tops of the embedding frame 12, and are fixedly connected with collar rings 315. The collar rings 315 are initially movably sleeved on the outside of the first positioning columns 316.The bottom ends of the first positioning posts 316 are all fixed to the top end of the embedded frame 12. The vertical cross-section of each first positioning post 316 is T-shaped. Between each pair of first positioning posts 316 on the same side, there are two symmetrically arranged second positioning posts 317 fixed to the top end of the embedded frame 12. The shapes of the first positioning posts 316 and the second positioning posts 317 are identical.

[0048] It is worth noting that the wire rope 38 is made of stainless steel, which is not easy to rust. In addition, when the two expansion plates 33 move away from each other, the second weakening part 32 deforms first, and then the third weakening part 331 deforms immediately afterward. The third weakening part 331, together with the design of the bottom end of the expansion plate 33 being inserted into the insertion bag 21, quickly opens the bag opening of the filter bag 2 to a fixed size.

[0049] The two compressed blocks 311 can extend to positions close to the longitudinal baffle 31 at opposite ends, in the attached Figure 7 As can be seen, this prevents the deformation of the spreading plate 33 from detaching from the outer end face of the compressed block 311;

[0050] The guide slope 3141 is designed to facilitate the quick insertion of the other end of the L-shaped positioning block 313 into the positioning port 314.

[0051] The design of the first spring plate 35 in conjunction with the second spring plate 37 means that its return elastic force is necessarily greater than that of the third spring plate 310. This makes it less likely for the two side walls of the expansion plate 33 to get stuck between the two squeezed blocks 311, thereby causing the two expansion plates 33 to rebound quickly and close the bag opening of the filter bag 2.

[0052] A pre-set gap exists between the first positioning post 316 and the second positioning post 317. This gap ensures that when the collar 315 switches from the first positioning post 316 to the outside of the second positioning post 317, the wire rope 38 pulls the spreading plate 33 to move. Additionally, the top protrusions of the first positioning post 316 and the second positioning post 317 have chamfered edges on their top and bottom surfaces. Figure 12 As can be seen, this design is intended to allow the collar 315 to be quickly fitted onto or removed from the first positioning post 316 and the second positioning post 317.

[0053] In actual use, during installation, the top opening flange of the filter bag 2 is first inserted into the insertion groove 121. With the help of the pre-positioning component, the top opening flange of the filter bag 2 is pre-fixed within the insertion groove 121. Then, by manually pulling the four collars 315 on each individual insert frame 12, the collars 315 switch from their initial position on the first positioning post 316 to their position on the outside of the corresponding second positioning post 317. At this time, the steel wire ropes 38 pull on the expansion plates 33. With the second weakening part 32, the third weakening part 331, and the multiple bottom areas of the expansion plates 33 all inserted into the insertion bag 21, the two expansion plates 33 open the top opening of the filter bag 2 to a predetermined size. This setup passively opens the filter bag 2 to a predetermined shape to fully utilize its filtration capabilities. Yes, and at the same time, during the opening process of the two expansion plates 33, with the help of the first spring 35 and the second spring 37, the two first toothed plates 36 are squeezed to move away from each other. Then, the multiple teeth on the opposite side of the two first toothed plates 36 fix the top opening flange of the filter bag 2. Simultaneously, during the above-mentioned movement, the two side walls of the two expansion plates 33 press against the extrusion slope 3111 on the extruded block 311, thereby causing the two second toothed plates 39 to move away from each other. Then, the multiple teeth on the opposite side of the two second toothed plates 39 also fix the top opening flange of the filter bag 2. This setting can further fix the top opening flange of the filter bag 2 while opening the bag opening of the filter bag 2, ensuring the stability of the installation, and greatly improving the efficiency of the filter bag 2 being installed and removed from the embedded frame 12.

[0054] Simultaneously, the squeezed block 311 will drive the other end of the L-shaped positioning block 313 at the bottom to be inserted into the positioning port 314 opened in the inner wall of the embedding groove 11. Thus, while the top opening of the filter bag 2 is opened and fixed, the embedding frame 12 can be quickly locked in the embedding groove 11, further improving the assembly efficiency.

[0055] Especially when disassembling the filter bag 2, the collar 315 can be switched and fitted onto the outside of the first positioning post 316. Under the reverse rebound force of the first spring 35, the second spring 37 and the third spring 310, the two expansion plates 33 can automatically close the bag opening of the filter bag 2 with the help of the recovery action of the second weakening part 32 and the third weakening part 331. At the same time, the locking state of the top opening of the filter bag 2 and the locking state of the embedded frame 12 can be released. Then, when the filter bag 2 is pulled down, the bottom deformation and sticking state of the two expansion plates 33 can also make the bag opening of the filter bag 2 always in the process of being squeezed and closed during the process of being pulled down, so as to effectively seal the bag opening during disassembly and prevent dust from escaping and polluting the environment.

[0056] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. An air filter that is easy to install, comprising a mounting frame and multiple filter bags, wherein the top of the mounting frame has multiple equidistantly spaced embedding slots, and embedding frames are movably installed in each embedding slot, characterized in that, A stuffing groove is provided at the top edge of the embedding frame. A predetermined part is installed on the inner wall of the stuffing groove. The stuffing groove is used to stuff the top flanging of the filter bag, and the predetermined part is used to pre-position the top flanging. A plurality of equidistantly arranged insertion pockets are sewn on both side walls of each filter bag, and an opening is provided at the top of the insertion pocket. A dust-proof disassembly and assembly part is installed on the embedding frame. The dust-proof disassembly and assembly part cooperates with the predetermined part. On the one hand, it is used to fix the top flanging on the embedding frame and can also be used to fix the embedding frame in the embedding groove. On the other hand, it is used to expand or close the bag mouth of the filter bag. The pre-positioning includes a plurality of equidistantly arranged grooves respectively provided around the inner wall of the stuffing groove. A pressing plate is integrally formed at the inner top wall of each groove through a first weakening part. Two symmetrically arranged longitudinal baffles and two symmetrically arranged transverse baffles are fixedly connected to the inner bottom wall of the stuffing groove. The dust-proof disassembly and assembly part includes a spreading plate integrally formed at the top of each of the two longitudinal baffles through a second weakening part. The two spreading plates are symmetrically arranged. The vertical cross-section of the spreading plate is in an inverted "丿" shape structure, and a third weakening part is provided at the middle bending of the spreading plate. A plurality of equidistantly arranged lightening grooves are provided at the bottom ends of the spreading plates. Symmetrically arranged arc chamfers are provided in the bottom end area between every two adjacent lightening grooves. The bottom end area is used to be guided and inserted into the insertion pocket by means of the arc chamfer. Two symmetrically arranged steel wires are fixedly connected to the inclined surfaces on the opposite sides of the two spreading plates. The other ends of the steel wires respectively pass through the positioning frame movably and then extend to the top of the embedding frame movably, and are fixedly connected with a collar. The collars are movably sleeved on the outside of the first positioning columns in the initial state. The bottom ends of the first positioning columns are fixedly connected to the top end of the embedding frame. The vertical cross-section of the first positioning columns is in a T-shaped structure. Two symmetrically arranged second positioning columns fixedly connected to the top end of the embedding frame are also provided between the two first positioning columns on the same side. The shapes of the first positioning columns and the second positioning columns are the same.

2. The air filter that is easy to install according to claim 1, characterized in that, The transverse baffle and the longitudinal baffle are vertically distributed. The bottom ends of the pressing plates are inclined and are movably lapped on the inner side surfaces of the transverse baffle or the longitudinal baffle.

3. The air filter that is easy to install according to claim 1, characterized in that, A first moving channel is penetrated through each of the two longitudinal baffles. A first toothed plate is movably installed in each first moving channel. The back sides of the two first toothed plates facing each other are fixedly connected to the outside of the spreading plate through a plurality of equidistantly arranged first elastic pieces. The vertical cross-section of the first elastic pieces is in a W-shaped structure. Second elastic pieces with a cross-section in a Z-shaped structure are fixedly connected to the two side edges of the back sides of the two first toothed plates. One ends of the two second elastic pieces away from each other are fixedly connected to the outside of the longitudinal baffle through a connecting piece.

4. The air filter that is easy to install according to claim 3, characterized in that, A second moving channel is opened through both of the two transverse baffles. A second toothed plate is movably installed in each of the second moving channels. The second toothed plates are perpendicular to the first toothed plates. Two symmetrically arranged third spring pieces are fixed to the opposite back edges of the two second toothed plates. The cross-section of each third spring piece is Z-shaped. Two symmetrically arranged compression blocks are fixed to the opposite back of the two second toothed plates. A compression slope is opened on the end of each compression block away from the second toothed plate. The compression slope is movably overlapped on the outside of the expansion plate.

5. An air filter that is easy to install according to claim 4, characterized in that, The compressed blocks are all located between two symmetrically arranged third spring sheets, and the ends of the compressed blocks away from the compression slope slide in the moving grooves opened in the inner wall of the second moving channel.

6. The air filter that is easy to install according to claim 4, characterized in that, The bottom end of each of the compressed blocks is fixed with an L-shaped positioning block, the other end of each L-shaped positioning block is movable through the positioning frame, the other end of each L-shaped positioning block is flush with the outer surface of the positioning frame, the inner wall of each embedded groove is provided with a positioning port that is adapted to be inserted into the other end of the L-shaped positioning block, and a guide slope is provided around the opening of each positioning port.

Images