Folding filter with folding welt

Abstract

The utility model relates to the technical field of filters, in particular to a folding filter with a folding welt, aims to solve the technical problems that solid waste is difficult to treat and a folding filter element is easy to leak in the prior art, and is mainly realized by the following technical scheme: the folding filter with the folding welt comprises a filter element and a folding welt, comprising an inner core and an outer frame, the inner core is clamped in the outer frame, the inner core and the outer frame are each of a folding structure, the inner core comprises welt pieces and a filter element piece, the outer frame comprises a frame body piece and a reinforcing piece, the reinforcing piece and the frame body piece are assembled and then arranged in the frame body piece, the reinforcing piece comprises a plurality of supporting strips and a plurality of fixing strips, and the welt pieces are arranged on the two sides of the filter element piece for gluing and covering. No leakage of the filter element piece is ensured; the welt piece is in a folded wrinkle form matched with the filter element piece, so that all parts are tightly attached during folding and unfolding, and the possibility of random falling and separation is reduced; the outer frame is of a folding structure, the whole production process is simple, and follow-up transportation is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a pleated filter with a folded edge. Background Art

[0002] Existing air filters are generally bulky, difficult to maintain and replace, and are prone to air leakage when folded or moved, thereby reducing filtering efficiency.

[0003] The existing technology focuses on air filters, which have many shortcomings in terms of sealing and portability. On the one hand, in order to ensure the efficient sealing performance of the filter without leakage, manufacturers are often not limited to the installation or transportation size, and often use metal frames to wrap the high-efficiency filter materials. The use of metal frames in filters not only greatly increases the production, installation and transportation costs, but also requires a large amount of composite glue to completely seal the frame and filter material during assembly. After the filter reaches the end of its service life, there are also problems with the treatment of the frame and filter material; on the other hand, in order to reduce the production, installation and transportation costs, the foldable air filters used are affected by the production technology level. Manufacturers often only select low-energy filtration grade filter materials such as primary efficiency and medium efficiency to make air filters. The air filtration effect cannot meet the needs of various customers, and when in use, the two sides of the folded filter element are often prone to leakage, resulting in filtration failure. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defects of the prior art that solid waste is difficult to treat and the pleated filter element is prone to leakage, thereby providing a pleated filter with a folded edge.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A pleated filter with a folded edge comprises an inner core and an outer frame, wherein the inner core is snap-connected and arranged in the outer frame, and both the inner core and the outer frame are folded structures. The inner core comprises an edge piece and a filter element piece, wherein the edge pieces are relatively arranged on both sides of the filter element piece and are arranged along the length direction of the filter element piece, and the outer frame comprises a frame piece and a reinforcement piece, wherein the reinforcement piece is arranged inside the frame piece after being assembled with the frame piece, and the reinforcement piece comprises a plurality of support bars and a plurality of fixing bars, wherein the support bars are arranged near the front side of the frame piece after being assembled, and the fixing bars are arranged on opposite sides of the frame piece and near the edge piece after being assembled.

[0007] By adopting the above technical solution, edging pieces are arranged on the left and right sides of the filter element which are prone to leakage for gluing and bonding, thereby ensuring that the filter element is leak-free; the edging pieces are in the form of folded pleats adapted to the filter element, and can be stretched and unfolded as the filter element is stretched, ensuring that the various parts fit tightly when folded and unfolded, and are easy to store after snap-on connection, reducing the possibility of arbitrary falling off and separation; the outer frame is also a folding structure and the overall production process is simple, which is convenient for subsequent transportation.

[0008] Furthermore, the edging piece includes an edging strip, a plurality of positive folds and a plurality of reverse folds, the edging strip is arranged along the length direction of the filter element, the positive folds are V-shaped and arranged in an array along the length direction of the edging strip, the reverse folds are arranged along the width direction of the edging strip and arranged in an array along the length direction of the edging strip, and the reverse folds are arranged at the center line of the positive folds and between two adjacent positive folds.

[0009] By adopting the above technical solution, the welt strip is folded according to the positive crease and the reverse crease to form a unique welt pleat structure, ensuring that there is no leakage on the left and right sides of the filter element.

[0010] Furthermore, the filter element includes a first non-woven fabric layer, a first antibacterial layer, a filter layer, a second antibacterial layer and a second non-woven fabric layer which are integrally and sequentially arranged.

[0011] By adopting the above technical solution, the filter element layer with a multi-layer structure and the use of high-efficiency filter materials can effectively remove a variety of fine particulate pollutants and ensure the filtering effect.

[0012] Furthermore, the filter element is in the form of a plurality of V-shaped folds arranged in parallel, the V-shapes of the filter element are arranged in an array along the length direction of the filter element, and the height of the filter element is equal to the length of the positive fold.

[0013] By adopting the above technical solution, the folded filter element can make full use of the filter element material, increase the contact area between air and filter element without affecting the air resistance, ensure sufficient filtration, and effectively improve the filtration effect.

[0014] Furthermore, the frame member includes an air inlet surface, a first side surface, an air outlet surface and a second side surface which are arranged in sequence, a top cover surface extends above the air inlet surface, a top side fold is arranged at the bottom of the top cover surface and the top of the air inlet surface, a bottom connecting surface extends below the air outlet surface, a bottom side fold is arranged at the top of the bottom connecting surface and the bottom of the air outlet surface.

[0015] By adopting the above technical solution, the air inlet surface, the first side surface, the air outlet surface and the second side surface are arranged to form the four side surfaces of the frame member, and the top cover surface and the bottom connecting surface form the upper and lower surfaces, thereby completing the splicing and assembly of the frame member.

[0016] Furthermore, the air inlet surface is provided with a plurality of air inlet slots along the length direction, and the air outlet surface is provided with a plurality of air outlet slots along the length direction.

[0017] By adopting the above technical solution, the air inlet slot and the air outlet slot facilitate the air flow to enter and flow out.

[0018] Furthermore, the reinforcement member is arranged on the frame member before assembly, and the support bar and the fixing bar are respectively clamped and arranged in the air inlet slot and the air outlet slot.

[0019] By adopting the above technical solution, the reinforcement is snap-fitted into the air inlet and outlet slots on the frame member before assembly, which reduces the transportation space, facilitates subsequent overall transportation and enables assembly when used on site.

[0020] Furthermore, a glue layer fixed to the bottom of the filter element is also provided on the side of the bottom joint surface close to the inner core.

[0021] By adopting the above technical solution, a glue layer is arranged to adhere to the bottom of the filter element layer to ensure that the outer frame and the inner core are firmly fixed.

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

[0023] 1. The pleated filter with folded edges provided by the utility model has edge pieces arranged on the left and right sides of the filter element that are prone to leakage for gluing and bonding, thereby ensuring that the filter element is leak-free.

[0024] 2. The utility model provides a pleated filter with a folded edge, and the edge piece is in the form of folded pleats that fit the filter element. It can be stretched and unfolded along with the filter element, ensuring that all parts fit tightly when folded and unfolded, and it is also convenient to store after snap-on connection, reducing the possibility of random falling off and separation.

[0025] 3. The foldable filter with foldable edges provided by the utility model also has a foldable outer frame and a simple overall production process, which is convenient for subsequent transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 This is a schematic diagram of the overall structure of a pleated filter with a folded edge provided in one embodiment of the utility model;

[0028] Figure 2 This is an internal structure diagram of a pleated filter with a folded edge provided in one embodiment of the utility model;

[0029] Figure 3 A partial exploded structural diagram of an inner core provided in one embodiment of the utility model;

[0030] Figure 4 for Figure 3 An enlarged structural schematic diagram of the A portion shown;

[0031] Figure 5 A schematic diagram of the unfolded structure of the welt provided in one embodiment of the utility model;

[0032] Figure 6 It is a schematic diagram of the expanded structure of the outer frame provided in one embodiment of the utility model.

[0033] Description of reference numerals:

[0034] 1. Inner core; 2. Edge fitting; 21. Edge strip; 22. Forward fold; 23. Reverse fold; 3. Filter element; 31. First non-woven fabric layer; 32. First antibacterial layer; 33. Filter layer; 34. Second antibacterial layer; 35. Second non-woven fabric layer; 4. Outer frame; 5. Frame body; 51. Air inlet surface; 511. Top cover surface; 512. Top side fold; 513. Air inlet slot; 52. First side surface; 53. Air outlet surface; 531. Bottom connection surface; 532. Bottom side fold; 533. Glue layer; 534. Air outlet slot; 54. Second side surface; 6. Reinforcement; 61. Support strip; 62. Fixing strip. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] A pleated filter with folded edges, such as Figure 1 and Figure 2As shown, it includes an inner core 1 and an outer frame 4, the inner core 1 is clamped and arranged in the outer frame 4, the inner core 1 and the outer frame 4 are both folding structures, the inner core 1 includes a welt piece 2 and a filter element 3, the welt piece 2 is relatively arranged on the left and right sides of the filter element 3 and the welt piece 2 is arranged along the length direction of the filter element 3. The outer frame 4 includes a frame member 5 and a reinforcing member 6, the reinforcing member 6 is arranged inside the frame member 5 after being assembled with the frame member 5, the reinforcing member 6 includes a plurality of supporting strips 61 and a plurality of fixing strips 62, the supporting strips 61 are arranged near the front side of the frame member 5 and near the side of the inner core 1 after being assembled, the fixing strips 62 are arranged on the opposite left and right sides of the frame member 5 and near the welt piece 2 after being assembled, and the fixing strips 62 are assembled into a bent shape. Edge pieces 2 are arranged on the left and right sides of the filter element 3 which are prone to leakage for gluing and bonding, so as to ensure that the filter element 3 is leak-free; the edge pieces 2 are in the form of folded pleats adapted to the filter element 3, and can be stretched and unfolded along with the filter element 3, ensuring that the various parts fit tightly when folded and unfolded, and are convenient for storage after snap-fitting, reducing the possibility of arbitrary falling off and separation; the outer frame 4 is also a folding structure and the overall production process is simple, which is convenient for subsequent transportation.

[0037] like Figure 2 , Figure 3 and Figure 5 As shown, the welt piece 2 includes a welt strip 21, a plurality of positive folds 22 and a plurality of reverse folds 23. The welt strip 21 is arranged along the length direction of the filter element 3. The positive folds 22 are V-shaped and arranged in an array along the length direction of the welt strip 21. The reverse folds 23 are arranged along the width direction of the welt strip 21 and arranged in an array along the length direction of the welt strip 21. The reverse folds 23 are arranged at the center line of the positive folds 22 and between two adjacent positive folds 22. The welt strip 21 is folded and formed according to the positive folds 22 and the reverse folds 23 to form a unique welt pleat structure to ensure that there is no leakage on the left and right sides of the filter element.

[0038] like Figure 2 , Figure 3 and Figure 4 As shown, the filter element 3 is in a folded shape with multiple V-shaped elements arranged in parallel. The V-shaped elements of the filter element 3 are arranged in an array along the length direction of the filter element 3, and the height of the filter element 3 is equal to the length of the positive fold 22. The folded filter element 3 can make full use of the filter element material, increase the contact area between the air and the filter element without affecting the air resistance, ensure sufficient filtration, and effectively improve the filtration effect. The height of the filter element 3 is equal to the length of the positive fold 22, which can facilitate the insertion of the folded edge piece 2 to ensure that the two fit tightly.

[0039] The filter element 3 includes a first non-woven fabric layer 31, a first antibacterial layer 32, a filter layer 33, a second antibacterial layer 34 and a second non-woven fabric layer 35 which are integrally arranged in sequence. The filter element layer of the multi-layer structure is also made of high-efficiency filter material, which can efficiently remove a variety of fine particulate pollutants and ensure the filtering effect.

[0040] like Figure 1, Figure 2 and Figure 6 As shown, the frame member 5 includes an air inlet surface 51, a first side surface 52, an air outlet surface 53 and a second side surface 54 arranged in sequence, a top cover surface 511 extends above the air inlet surface 51, a top side fold 512 is arranged at the bottom of the top cover surface 511 and the top of the air inlet surface 51, a bottom connection surface 531 extends below the air outlet surface 53, and a bottom side fold 532 is arranged at the top of the bottom connection surface 531 and the bottom of the air outlet surface 53. A glue layer 533 fixed to the bottom of the filter element 3 is also arranged on the side of the bottom connection surface 531 close to the inner core 1. The glue layer 533 is arranged to adhere to the bottom of the filter element layer to ensure that the outer frame 4 and the inner core 1 are firmly fixed.

[0041] A plurality of air inlet slots 513 are provided on the air inlet surface 51 along the length direction, and a plurality of air outlet slots 534 are provided on the air outlet surface 53 along the length direction. The reinforcement member 6 is arranged on the frame member 5 before assembly, and the support bar 61 and the fixing bar 62 are respectively clamped and arranged in the air inlet slots 513 and the air outlet slots 534. The support bar 61 is arranged in the two air inlet slots 513 and the two air outlet slots 534 near the two sides, and the fixing bar 62 is arranged in the four air inlet slots 513 and the four air outlet slots 534 near the middle. The slot size on both sides of the air inlet slot 513 is slightly smaller than the slot size in the middle to prevent polluted air from entering the easy leakage area of ​​the inner core 1. Similarly, the slot size on both sides of the air outlet slot 534 is slightly smaller than the slot size in the middle. The reinforcement member 6 is clamped and arranged in the air inlet slot 513 and the air outlet slot 534 on the frame member 5 before assembly, which reduces the transportation space, facilitates the subsequent overall transportation and can be assembled when used on site.

[0042] The working principle and use method of the pleated filter with folded edging are as follows: the edging piece 2 is set according to the height of the filter element 3, and the edging strip 21 is folded according to the positive fold 22 and the reverse fold 23 and inserted into the filter element 3, and glued together; the frame piece 5 is assembled to form a rectangular frame, the inner core 1 is placed in it, and the bottom glue layer 533 is bonded, and then the support strip 61 and the fixing strip 62 stuck in the air inlet slot 513 and the air outlet slot 534 are removed, and the support strip 61 is inserted between the inner core 1 and the front side of the frame piece 5, and the fixing strip 62 is set on the left and right sides of the inner core 1, and finally the top cover surface 511 is closed to complete the assembly of the entire filter.

[0043] The above description shows and describes the preferred embodiments of the utility model. As mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A pleated filter with folded edges, characterized in that: The invention comprises an inner core (1) and an outer frame (4), wherein the inner core (1) is snap-fitted and arranged in the outer frame (4), and both the inner core (1) and the outer frame (4) are folded structures. The inner core (1) comprises a welt piece (2) and a filter element (3), wherein the welt piece (2) is arranged on both sides of the filter element (3) relative to each other and the welt piece (2) is arranged along the length direction of the filter element (3), and the outer frame (4) comprises a frame element (5) and a reinforcing element (6), wherein the reinforcing element (6) is arranged inside the frame element (5) after being assembled with the frame element (5), and the reinforcing element (6) comprises a plurality of supporting strips (61) and a plurality of fixing strips (62), wherein the supporting strips (61) are arranged near the front side of the frame element (5) after being assembled, and the fixing strips (62) are arranged on two opposite sides of the frame element (5) and near the welt piece (2) after being assembled.

2. A pleated filter with folded edges according to claim 1, characterized in that: The welt member (2) comprises a welt strip (21), a plurality of positive folds (22) and a plurality of negative folds (23); the welt strip (21) is arranged along the length direction of the filter element (3); the positive folds (22) are V-shaped and arranged in an array along the length direction of the welt strip (21); the negative folds (23) are arranged along the width direction of the welt strip (21) and arranged in an array along the length direction of the welt strip (21); the negative folds (23) are arranged at the center line of the positive folds (22) and between two adjacent positive folds (22).

3. A pleated filter with folded edges according to claim 2, characterized in that: The filter element (3) comprises a first non-woven fabric layer (31), a first antibacterial layer (32), a filter layer (33), a second antibacterial layer (34) and a second non-woven fabric layer (35) which are integrally and sequentially arranged.

4. A pleated filter with folded edges according to claim 3, characterized in that: The filter element (3) is in the form of a plurality of V-shaped folds arranged in parallel, the V-shapes of the filter element (3) are arranged in an array along the length direction of the filter element (3), and the height of the filter element (3) is equal to the length of the positive fold (22).

5. A pleated filter with folded edges according to claim 4, characterized in that: The frame member (5) comprises an air inlet surface (51), a first side surface (52), an air outlet surface (53) and a second side surface (54) which are arranged in sequence; a top cover surface (511) extends above the air inlet surface (51); a top side fold (512) is arranged between the bottom of the top cover surface (511) and the top of the air inlet surface (51); a bottom connecting surface (531) extends below the air outlet surface (53); a bottom side fold (532) is arranged between the top of the bottom connecting surface (531) and the bottom of the air outlet surface (53).

6. A pleated filter with folded edges according to claim 5, characterized in that: The air inlet surface (51) is provided with a plurality of air inlet slots (513) along the length direction, and the air outlet surface (53) is provided with a plurality of air outlet slots (534) along the length direction.

7. A pleated filter with folded edges according to claim 6, characterized in that: The reinforcing member (6) is arranged on the frame member (5) before assembly, and the supporting strip (61) and the fixing strip (62) are respectively clamped and arranged in the air inlet slot (513) and the air outlet slot (534).

8. A pleated filter with folded edges according to claim 5, characterized in that: A glue layer (533) fixed to the bottom of the filter element (3) is also provided on the side of the bottom connection surface (531) close to the inner core (1).

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