A bag-type formaldehyde removal filter

Abstract

This utility model relates to the field of air filter technology, specifically to a bag-type formaldehyde removal filter. The technical problem it aims to solve is overcoming the defects in disassembly and storage in existing technologies. This is mainly achieved through the following technical solution: A bag-type formaldehyde removal filter includes multiple filter bags and filter frames. The filter bags are arranged in an array within the filter frames. Each filter bag includes a sewn filter disc and a fixing frame. The fixing frame engages and fixes one end of the filter disc opening, and adjacent filter bags are interlocked. The filter frame includes a receiving frame, a locking frame, and a disassembly frame. The multi-layer composite structure of the filter bags is assembled and fixed with the filter frame to form a filter. The size can be adjusted according to the number of bags, improving the removal capacity of activated carbon fiber for formaldehyde and odors while reducing air resistance.

Description

Technical Field

[0001] This utility model relates to the field of air filter technology, specifically to a bag-type formaldehyde removal filter. Background Technology

[0002] Bag air filters, as a highly efficient air purification device, are widely used in industrial, commercial, and residential environments to remove pollutants such as particulate matter, dust, pollen, bacteria, and viruses from the air to improve air quality. They mainly capture and filter pollutants in the air through their filter bags. These filter bags are usually made of synthetic fibers, polyester fibers, glass fibers, or other high-efficiency filter materials, and have a large surface area and excellent filtration efficiency. When air passes through the filter, pollutants are intercepted on the surface of the filter bag, while clean air is discharged through the tiny pores of the filter bag.

[0003] Existing bag air filters typically consist of an outer frame, an inner frame, filter bags, and clips. During installation, each filter bag needs to be assembled sequentially, requiring multiple connection structures for fixation. The installation method is cumbersome, and subsequent disassembly and replacement are inconvenient and not easy to reuse. In addition, the overall structure of the installed filter element is large and not conducive to transportation. Therefore, there is a need for a bag formaldehyde removal filter that is easy to store, transport, assemble, and disassemble. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the defects in disassembly and storage in the prior art, thereby providing a bag-type formaldehyde removal filter.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A bag-type formaldehyde removal filter includes multiple filter bags and filter frames. The filter bags are arrayed and installed inside the filter frames. Each filter bag includes a sewn filter sheet and a fixing frame. The fixing frame engages and fixes one end of the filter sheet opening. Adjacent filter bags are interlocked. The filter frame includes a receiving frame, a locking frame, and a disassembly frame. The receiving frame and the locking frame are interlocked and both have U-shaped openings facing the disassembly frame. The disassembly frame is interlocked with the sides of the receiving frame and the locking frame.

[0007] By adopting the above technical solution, after the filter sheet is sewn into a filter bag, air enters from the large opening of the filter bag and flows out from the small opening. As the area of ​​the filter bag gradually decreases, the air velocity gradually increases and the contact with the filter bag is increased, which optimizes the airflow distribution and meets the filtration requirements, and can also effectively reduce wind resistance. The fixing frame fixes the filter bag and provides structural support and is easy to disassemble. The fixing frame is a metal structure, which can also ensure the stability of the support.

[0008] Furthermore, the filter sheet includes an adsorption layer, an intermediate protective layer, a fiber layer and an outer protective layer arranged in sequence. The fiber layer is disposed between the intermediate protective layer and the outer protective layer. Each filter bag is made of two filter sheets sewn together, and the side of the two filter sheets that are close to each other is the adsorption layer.

[0009] By adopting the above technical solution, the adsorption layer is a particulate adsorption material, which can be selected from electrostatic meltblown, glass fiber, polyester, polytetrafluoroethylene and other materials according to different application scenarios and requirements. The protective layer is a non-woven fabric material, mostly 15-25g PP non-woven fabric material, which has the advantages of thinness and good air permeability. The fiber layer is activated carbon fiber, with a specific surface area of ​​2000±300m2 / g, a micropore size of 1-2nm accounting for more than 75%, and a formaldehyde adsorption capacity ≥120mg / g, which effectively improves the adsorption efficiency.

[0010] Furthermore, all the filter sheets are in the shape of an isosceles trapezoid, the bottom edge of the filter sheet is unstitched and connected to the fixing frame, the top edge and side edge of the filter sheet are double-stitched, and multiple V-shaped overlock lines are provided between the double-stitched lines, with the top and bottom ends of the overlock lines fixed to the double-stitched lines.

[0011] By adopting the above technical solution, the sewing process of double pressing and locking lines ensures the sealing and durability of the filter belt composed of filter sheets, ensuring its service life and preventing it from easily coming undone.

[0012] Furthermore, the fixing frame is rectangular and includes an upper frame and a lower frame that interlock with each other. The bottom of the upper frame has a buckle, and the buckle is arranged in two parallel rings along the bottom circumference of the upper frame. The top of the lower frame has a slot corresponding to the buckle.

[0013] By adopting the above technical solution, the upper and lower clip frames are used to clip the opening of the filter bag and are very easy to disassemble, facilitating subsequent replacement operations.

[0014] Furthermore, corner strips extend from the four corners inside the upper frame. The corner strips are perpendicular to the bottom surface of the upper frame and extend downwards towards the frame. The length of the corner strips is no more than one-quarter of the height of the filter.

[0015] By adopting the above technical solution, the corner strip provides guidance for the subsequent folding of the two trapezoidal filter sheets, making it easier to bring out the four corners of the filter bag and thus facilitating subsequent assembly operations.

[0016] Furthermore, overlapping blocks extend along the sides of the upper card frame in the length direction. The overlapping blocks are arranged along the length direction of the upper card frame and their length is half the length of the upper card frame. Two overlapping blocks on the same upper card frame are staggered, and overlapping grooves are correspondingly opened on adjacent upper card frames.

[0017] By adopting the above technical solution, the overlapping block and the overlapping groove cooperate to lock and fix the two adjacent upper frames, thereby ensuring the installation is firm.

[0018] Furthermore, the inner side walls of the receiving frame are provided with receiving grooves for receiving the fixing frame, and the receiving frame is also provided with a filling block corresponding to the overlapping block. The inner side wall of the locking frame is provided with a locking groove corresponding to the side of the fixing frame.

[0019] By adopting the above technical solution, the filling block is a soft material that connects with the end overlap block to fill the gap between the overlap block and the overlap groove, thus preventing unfiltered gas from flowing out from the gap.

[0020] Furthermore, both ends of the assembly / disassembly frame have columnar inserts, and both ends of the openings of the receiving frame and the locking frame are provided with insert slots corresponding to the inserts. Both ends of the openings of the receiving frame and the locking frame are also provided with vertical locking buckles, and the axis of the locking buckles is perpendicular to the axis of the inserts.

[0021] By adopting the above technical solution, the insert card and insert slot are fitted together to install the receiving frame and locking frame, and then the locking buckle is used to lock them in place, thus completing the installation of the filter.

[0022] In summary, the technical solution of this utility model has the following advantages:

[0023] 1. The bag-type formaldehyde removal filter provided by this utility model adopts a "bag" structure and is composed of an even number of trapezoidal activated carbon fiber composite material sheets sewn together to form a filter bag (two sheets sewn together as a set). Because activated carbon fiber material itself has low strength, although the surface strength of the composite material is high, it is still easily peeled off. Sewing it into a filter bag effectively enhances the strength of the material, ensuring the overall strength of the composite activated carbon fiber even under high airflow conditions.

[0024] 2. The bag-type formaldehyde removal filter provided by this utility model has a detachable frame and filter frame. The filter bag is flat after sewing, which is convenient for stacking and transportation. The whole assembly and disassembly are convenient.

[0025] 3. The bag-type formaldehyde removal filter provided by this utility model has a filter structure that can be adjusted according to the number and size of bags to adapt to various application scenarios. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of a bag-type formaldehyde removal filter provided in one embodiment of the present invention;

[0028] Figure 2 This is an exploded structural diagram of a bag-type formaldehyde removal filter provided in one embodiment of the present invention;

[0029] Figure 3 This is a partial structural diagram of a filter bag provided in one embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Filter bag; 2. Filter frame; 21. Receiving frame; 211. Receiving groove; 212. Filling block; 22. Clamping frame; 221. Clamping groove; 23. Disassembly frame; 231. Insertion clip; 24. Insertion groove; 25. Locking buckle; 3. Filter sheet; 31. Adsorption layer; 32. Middle protective layer; 33. Fiber layer; 34. Outer protective layer; 35. Double pressure line; 36. Sealing line; 4. Fixing frame; 41. Upper clamping frame; 411. Buckle; 412. Corner strip; 413. Overlap block; 414. Overlap groove; 42. Lower clamping frame; 421. Slot. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0033] A bag-type formaldehyde removal filter, such as Figure 1 and Figure 2 As shown, the system includes multiple filter bags 1 and filter frames 2. The filter bags 1 are arrayed and installed within the filter frames 2. Each filter bag 1 includes a sewn filter disc 3 and a fixing frame 4. The fixing frame 4 engages and fixes one end of the opening of the filter disc 3. Adjacent filter bags 1 are interlocked. After the filter disc 3 is sewn into the filter bag 1, air enters from the larger opening and flows out from the smaller opening. As the area of ​​the filter bag 1 gradually decreases, the airflow velocity gradually increases and the contact with the filter bag 1 is increased, optimizing the airflow distribution and meeting the filtration requirements, while also effectively reducing wind resistance.

[0034] like Figure 2 and Figure 3As shown, the filter 3 includes an adsorption layer 31, a middle protective layer 32, a fiber layer 33, and an outer protective layer 34 arranged sequentially. The fiber layer 33 is disposed between the middle protective layer 32 and the outer protective layer 34. Each filter bag 1 is made of two filter sheets 3 sewn together, with the side of the two filter sheets 3 closest to each other forming the adsorption layer 31. The adsorption layer 31 is a particulate adsorption material, which can be selected from electrostatic meltblown, glass fiber, polyester, polytetrafluoroethylene, etc., depending on the application scenario and requirements. The protective layer is a non-woven fabric material, mostly using 15-25g PP non-woven fabric, which has the advantages of thinness and good air permeability. The fiber layer 33 is activated carbon fiber with a specific surface area of ​​2000±300m². 2 / g, with micropores of 1-2nm accounting for more than 75%, formaldehyde adsorption capacity ≥120mg / g, effectively improving adsorption efficiency.

[0035] All filter elements 3 are isosceles trapezoids. The bottom edge of the filter element 3 is unsewn, which becomes the opening of the filter bag 1 after assembly and connects to the fixing frame 4. The top and side edges of the filter elements 3 are sewn with double-stitched seams 35. Multiple V-shaped overlock seams 36 are also provided between the double-stitched seams 35, with the top and bottom ends of the overlock seams 36 fixed to the double-stitched seams 35. The sewing process of the double-stitched seams 35 and the overlock seams 36 ensures the sealing and durability of the filter belt composed of filter elements 3, ensuring its service life and preventing it from fraying or falling apart.

[0036] like Figure 2 As shown, the fixing frame 4 is rectangular and includes an upper frame 41 and a lower frame 42 that interlock. A buckle 411 extends from the bottom of the upper frame 41, and two rings of buckles 411 are arranged side-by-side along the bottom circumference of the upper frame 41. A slot 421 is provided on the top of the lower frame 42 corresponding to the buckle 411. The upper frame 41 and lower frame 42 are used to engage the opening of the filter bag 1 and are easily disassembled for convenient replacement.

[0037] Corner strips 412 extend from the four corners inside the upper frame 41. The corner strips 412 are set perpendicular to the bottom surface of the upper frame 41 and extend downward to the frame 42. The length of the corner strips 412 is no more than one-quarter of the height of the filter sheet 3. The corner strips 412 provide guidance for the subsequent folding of the two trapezoidal filter sheets 3, making it easier to bring out the four corners of the filter bag 1 and thus facilitate subsequent assembly operations.

[0038] Each side of the upper frame 41 extends with an overlapping block 413 along its length. The overlapping block 413 is positioned along the length of the upper frame 41 and its length is half the length of the upper frame 41. Two overlapping blocks 413 on the same upper frame 41 are staggered, and corresponding overlapping grooves 414 are provided on adjacent upper frames 41. The overlapping blocks 413 and overlapping grooves 414 cooperate with each other to lock and fix two adjacent upper frames 41, thereby ensuring the installation is secure.

[0039] like Figure 1 and Figure 2 As shown, the filter frame 2 includes a receiving frame 21, a locking frame 22, and a disassembly frame 23. The receiving frame 21 and the locking frame 22 are locked together and both are U-shaped with their openings facing the disassembly frame 23. The disassembly frame 23 is locked to the side of the receiving frame 21 and the locking frame 22.

[0040] The inner side walls of the receiving frame 21 are provided with receiving grooves 211 for receiving the fixing bracket 4. The receiving frame 21 is also provided with a filling block 212 corresponding to the overlapping block 413. The inner side walls of the locking frame 22 are provided with locking grooves 221 corresponding to the sides of the fixing bracket 4. The filling block 212 is made of soft material and connects with the overlapping block 413 at the end to fill the gap between the overlapping block 413 and the overlapping groove 414, so as to prevent unfiltered gas from flowing out from the gap.

[0041] Both ends of the disassembly frame 23 have columnar insertion clips 231 extending from them. The openings of the receiving frame 21 and the locking frame 22 each have corresponding insertion slots 24 on the insertion clips 231. Vertical locking buckles 25 are also installed through both ends of the openings of the receiving frame 21 and the locking frame 22, with the axis of the locking buckle 25 perpendicular to the axis of the insertion clip 231. After the insertion clips 231 and insertion slots 24 are engaged to install the receiving frame 21 and the locking frame 22, they are then secured by the locking buckles 25, completing the filter installation.

[0042] The working principle and usage of this bag-type formaldehyde removal filter are as follows: The filter sheet 3 is composed of a fiber layer 33 as the base, a composite protective layer and an adsorption layer 31. After sewing and locking the edges of two filter sheets 3, they are fixed into a bag-shaped structure by the fixing frame 4 and installed in the receiving frame 21. The locking frame 22 is then placed on the back cover, and finally the filter is fixed by inserting and installing the locking buckle 25 through the disassembly frame 23, thus completing the assembly of the filter.

[0043] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A bag-type formaldehyde removal filter, characterized in that, The filter includes multiple filter bags (1) and filter frames (2). The filter bags (1) are arrayed and installed inside the filter frames (2). Each filter bag (1) includes a sewn filter sheet (3) and a fixing frame (4). The fixing frame (4) engages and fixes one end of the opening of the filter sheet (3). Two adjacent filter bags (1) are engaged together. The filter frame (2) includes a receiving frame (21), a locking frame (22), and a disassembly frame (23). The receiving frame (21) and the locking frame (22) are engaged and both have U-shaped openings facing the disassembly frame (23). The disassembly frame (23) is engaged with the sides of the receiving frame (21) and the locking frame (22).

2. The bag-type formaldehyde removal filter according to claim 1, characterized in that, The filter (3) includes an adsorption layer (31), an intermediate protective layer (32), a fiber layer (33) and an outer protective layer (34) arranged in sequence. The fiber layer (33) is arranged between the intermediate protective layer (32) and the outer protective layer (34). Each filter bag (1) is made of two filter sheets (3) sewn together, and the side of the two filter sheets (3) that is close to each other is the adsorption layer (31).

3. A bag-type formaldehyde removal filter according to claim 2, characterized in that, The filter sheets (3) are all in the shape of an isosceles trapezoid. The bottom edge of the filter sheet (3) is unstitched and connected to the fixing frame (4). The top edge and side edge of the filter sheet (3) are sewn with double pressure lines (35). Multiple V-shaped overlock lines (36) are also provided between the double pressure lines (35). The top and bottom ends of the overlock lines (36) are fixed on the double pressure lines (35).

4. A bag-type formaldehyde removal filter according to claim 3, characterized in that, The fixing frame (4) is rectangular and includes an upper frame (41) and a lower frame (42) that interlock with each other. The bottom of the upper frame (41) has a buckle (411) extending from it. The buckle (411) is arranged in two rings along the bottom perimeter of the upper frame (41) and is arranged in parallel. The top of the lower frame (42) has a slot (421) corresponding to the buckle (411).

5. A bag-type formaldehyde removal filter according to claim 4, characterized in that, Corner strips (412) extend from the four corners inside the upper frame (41). The corner strips (412) are set perpendicular to the bottom surface of the upper frame (41) and extend to the lower frame (42). The length of the corner strips (412) is no more than one-quarter of the height of the filter (3).

6. A bag-type formaldehyde removal filter according to claim 5, characterized in that, The upper card frame (41) has overlapping blocks (413) extending along its length. The overlapping blocks (413) are arranged along the length of the upper card frame (41) and their length is half the length of the upper card frame (41). Two overlapping blocks (413) on the same upper card frame (41) are staggered, and overlapping grooves (414) are correspondingly opened on adjacent upper card frames (41).

7. A bag-type formaldehyde removal filter according to claim 6, characterized in that, The inner side walls of the receiving frame (21) are provided with receiving grooves (211) for receiving the fixing frame (4), and the inner side walls of the receiving frame (21) are provided with filling blocks (212) corresponding to the overlapping blocks (413), and the inner side walls of the locking frame (22) are provided with locking grooves (221) corresponding to the side of the fixing frame (4).

8. A bag-type formaldehyde removal filter according to claim 7, characterized in that, Both ends of the disassembly frame (23) have columnar plug-in clips (231). Both ends of the openings of the receiving frame (21) and the locking frame (22) are provided with plug-in slots (24) corresponding to the plug-in clips (231). Both ends of the openings of the receiving frame (21) and the locking frame (22) are also provided with vertical locking buckles (25). The axis of the locking buckle (25) is perpendicular to the axis of the plug-in clip (231).

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