Self-sealing stackable easy-to-install and remove filters

Abstract

A self-sealing, stackable, and easily removable filter includes a frame and filter elements. The filter elements are detachably disposed within the frame. The frame includes an L-shaped first frame, a frame connector, and an L-shaped second frame perpendicularly connected to the first frame via the frame connector. The filter element includes filter media, a first core aligned with the top edge of the filter media and fitted to its lower edge, a second core perpendicular to the first core, and a filter element connector. The filter element connector is connected to the second core, and the second core is fastened to the second frame. Multiple filters can be stacked sequentially, aligned along the outer side of the frame, with the upper filter embedded in the lower filter, achieving a seal by its own weight.

Description

Technical Field

[0001] This invention relates to the field of filters, and more particularly to a filter with a convenient self-fixing and replaceable filter element. Background Technology

[0002] Air filters are innovative, efficient, and energy-saving filtration products, primarily used to treat odorous, toxic, harmful, and corrosive gases in the air. Currently, the conventional structure of an air filter includes a metal mounting frame and a filter body built into the metal mounting frame. The filter body includes a metal outer frame, filter elements arranged side-by-side within the metal outer frame, and metal protective meshes positioned on the inlet and outlet sides of the metal outer frame to protect the filter elements.

[0003] Currently, there are many types of air filters available; however, various defects still exist during their use, mainly in the following aspects: (1) The multi-layer stacking method of filters is not stable and usually requires the use of clips or other means to fix the layers.

[0004] (2) The frame and filter element are mostly connected by glue injection. The production process generates irritating odor gas, which is harmful to the health of operators. The glue injection solidification process is time-consuming, and removing excess glue is labor-intensive. In addition, the filter contains a large number of polluting chemicals.

[0005] (3) The frame connected by welding has defects such as complicated material cutting, easy to make mistakes, long assembly time, and air pollution.

[0006] (4) Application environments with limited installation space impose strict requirements on filter installation and replacement. Filters that are too large or have too little space for maintenance activities are not suitable.

[0007] (5) Due to the cleanliness of the application environment, there are difficulties in installing and replacing filters because it is impossible to wear high-strength labor protection equipment. The edges and corners of the filters are easily scratched, and they may fall and cause injury.

[0008] (6) During the manufacturing, transportation and installation of rectangular filters, the surface lacks protection, which may lead to surface scratches, dents, deformation and damage. Summary of the Invention

[0009] The purpose of this invention is to address the shortcomings of existing technologies by proposing a self-sealing, stackable, and easy-to-install filter. To achieve the above objectives, the present invention adopts the following technical solution: a self-sealing and stackable convenient filter, comprising a frame and a filter element, wherein the filter element is detachably disposed within the frame, and the frame comprises an L-shaped first frame, a frame connector, and an L-shaped second frame perpendicularly connected to the first frame via the frame connector; Both the first frame and the second frame are hollow frames with the same cross-section, including an upper flange, an outer wall, a lower flange, a lower concave flange, a top surface, an inner wall, and a bottom plate. The upper flange and the lower flange are located on the outer side of the frame, and the upper flange and the lower concave flange are fitted together. The top surface is attached to the bottom plate. The upper flange of the first frame is higher than the top surface, and the upper surface of the filter element is lower than the top surface.

[0010] Preferably, the filter element includes a filter material, a first core body that is aligned with the top edge of the filter material and fitted to its lower edge, and a second core body that is perpendicular to the first core body; The second core includes an extension, outer teeth, outer core wall, core base, inner teeth, inner core wall, and inner core cavity, with both ends of the filter material connected to the inner core cavity.

[0011] Preferably, the first core is an elastomer or a highly elastic membrane that encapsulates the fluid, including a short side and a long side, wherein the short side is attached to the fold on one side of the air outlet surface of the filter material.

[0012] Preferably, it further includes a filter element connector, which is connected to the second core; the second core also includes a bottom hook; the first frame and the second frame also include a bottom buckle; the width of the bottom hook is smaller than that of the bottom buckle and it is fastened to the bottom buckle.

[0013] Preferably, both the bottom buckle and the bottom hook have smooth surfaces.

[0014] Preferably, the width of the short side of the first core is smaller than that of the bottom buckle and it is fastened to the bottom buckle.

[0015] Preferably, the length of the base plate is greater than the distance between the outer wall and the inner wall, and the distance between the side of the upper flange away from the top surface and the top surface is not greater than the distance between the side of the lower flange near the base plate and the side of the base plate away from the lower flange.

[0016] Preferably, the first frame further includes an upper partition and a lower partition, which divide the interior of the first frame into an outer cavity and an inner cavity. The frame connector also includes a nail, which passes through the outer cavity and connects the first frame and the second frame through the nail.

[0017] Preferably, the outer teeth engage with the inner teeth, the width of the inner cavity of the core is greater than the distance between the outer teeth and the inner teeth, the thickness of the core base is greater than the thickness of the extension, the outer wall of the core, and the inner wall of the core, the density of the core base is not less than the density of the extension, the outer wall of the core, and the inner wall of the core, and the side of the bottom hook away from the inner cavity of the core is arc-shaped.

[0018] Preferably, the filter element connector is fixed by the engagement of the outer teeth and the inner teeth, with the side closest to the outer teeth close to the edge of the filter material.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) No glue is needed to fix the frame and the filter element. The frame is recyclable and does not need to be repeatedly disassembled and reassembled. The filter element can be easily replaced in the frame, which can reduce the cost of filter packaging and transportation, handling time and solid waste and / or hazardous waste disposal. (2) The filters can be stacked sequentially by aligning them along the outside of the frame. The upper filter is embedded in the lower filter, which can achieve sealing of the upper and lower stacked filters by its own weight. This helps to reduce the labor cost of installing the seals, reduce the assembly process, and reduce the impact of the released gas from the seals on the filter application environment. (3) The upper and lower flanges of the frame are located on the outer side of the frame, which can protect the outer surface of the frame and reduce the risk of scratches, bumps, and severe deformation during the production, assembly, transportation and installation of the frame. It can also enhance the side bearing capacity of the filter, which is conducive to increasing the stacking quality of the packaging and reducing packaging and transportation costs. (4) The second core in the filter element flips over by its own weight to fit against the core base and the second frame, and the two are fastened together to fix the filter element to the frame. No manual adjustment of position is required, and the one-step self-fastening can save labor costs for maintenance and replacement of the filter. The second core can simultaneously fix the filter media edge folds and the filter element connectors, which helps to reduce the number of processes, save the amount of glue used, and reduce the release of gas from the filter; (5) The spacing and lifting position of the filter element connectors in the filter element meet the requirements of human operating comfort, can be operated by a single person, and can be easily replaced; (6) The short side of the first core becomes thinner due to the pressure of the filter element's own weight, while the long side becomes thicker accordingly. This helps to fill the gap between the frame and the filter element, making the two tightly connected, increasing the filter's sealing performance, and improving the purification efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the self-sealing, stackable, and easily removable filter structure of the present invention; Figure 2 An exploded view of the self-sealing, stackable, and easily removable filter of the present invention; Figure 3 This is a cross-sectional view of the first frame of the self-sealing, stackable, and easily removable filter of the present invention; Figure 4 This is a schematic diagram of the installation of the self-sealing, stackable, and easily removable filter of the present invention. Figure 5 This is a schematic diagram of the first frame structure of the self-sealing, stackable, and easily removable filter of the present invention. Figure 6This is a schematic diagram of the first core structure of the self-sealing, stackable, and easily removable filter of the present invention. Figure 7 This is a schematic diagram of the second core structure of the self-sealing, stackable, and easily removable filter of the present invention. Detailed Implementation

[0021] To provide a further understanding of the purpose, structure, features, and functions of the present invention, detailed descriptions are provided below with reference to specific embodiments.

[0022] Please see Figure 1-7 An embodiment of the present invention provides a self-sealing, stackable, and easily removable filter, comprising a frame 1 and a filter element 2. The filter element 2 is detachably disposed within the frame 1. The frame 1 includes an L-shaped first frame 11, a frame connector 13, and an L-shaped second frame 12 perpendicularly connected to the first frame 11 via the frame connector 13. The first frame 11 and the second frame 12 may also be C-shaped, joined at right angles or 45° bevels. The first frame 11 and the second frame 12 are preferably integrally formed, but may also be made of sheet metal.

[0023] The first frame 11 and the second frame 12 are both hollow frames with the same cross-section, including an upper flange 1101, an outer wall 1103, a lower flange 1104, a lower concave flange 1105, a top surface 1106, an inner wall 1109, and a bottom plate 1111. The upper flange 1101 and the lower flange 1104 are located on the outer side of the frame 1, and the upper flange 1101 and the lower concave flange 1105 are fitted together. The top surface 1106 is attached to the bottom plate 1111. The upper flange 1101 of the first frame 11 is higher than the top surface 1106, and the upper surface of the filter element 2 is lower than the top surface 1106. The upper flange 1101 serves as a limiting and guiding function when the upper filter is inserted into the lower filter. The fact that the upper flange 1101 is higher than the upper surface of the filter element 2 can effectively prevent the filter element 2 from being scratched, dented, deformed, or broken. It also protects the screws.

[0024] The upper flange 1101 and lower flange 1104 are located on the outer side of the frame 1 to protect the outer surface of the frame 1 and reduce the risks of scratches, dents, and severe deformation during frame production, assembly, transportation, and installation. The upper flange 1101 and lower flange 1105 fit together, and the upper flange 1101 and lower flange 1104 can also enhance the side bearing capacity of the filter, which helps to increase the stacked quality of the packaging and reduce packaging and transportation costs. The top surface 1106 is attached to the bottom plate 1111 to achieve a seal between the upper and lower stacked filters. The outer wall 1103 connects the upper flange 1101 and lower flange 1104, and the inner wall 1109 connects the top surface 1106 and the bottom plate 1111.

[0025] Furthermore, the outer wall 1103 and the inner wall 1109 have the same thickness, which is 0.7-1.5 mm, more preferably 1.0-1.2 mm; the bottom plate 1111 has a length greater than the distance between the outer wall 1103 and the inner wall 1109, and the bottom plate 1111 can be a smooth plane, which can effectively support the filter element 2.

[0026] When the filters are stacked sequentially along the outer side of the frame 1, the upper flange 1101 and the lower concave flange 1105 fit together, and the top surface 1106 of the lower filter fits against the bottom plate 1111 of the upper filter. The upper filter is embedded in the lower filter, which can achieve sealing of the upper and lower stacked filters by its own weight. This helps to reduce the labor cost of installing the seal, reduce the assembly process, and reduce the impact of the released gas from the seal on the filter's application environment.

[0027] Preferably, the filter element 2 includes a filter material 23, a first core 21 that is aligned with the top edge of the filter material 23 and attached to its lower edge, and a second core 24 that is perpendicular to the first core 21; The second core 24 includes an extension 2401, external teeth 2402, outer core wall 2403, core base 2404, internal teeth 2405, inner core wall 2406, and inner core cavity 2407. The two ends of the filter material 23 are connected to the inner core cavity 2407.

[0028] Preferably, the first core 21 is an elastomer or a highly elastic membrane that encapsulates the fluid, including a short side 2102 and a long side 2101. The short side 2102 is attached to the fold on the air outlet side of the filter material 23. The short side 2102 is compressed and thinned by the weight of the filter element, while the long side 2101 is correspondingly thickened, so that the first core 21 seals the connection between the frame 1 and the filter element 2.

[0029] Furthermore, the first core 21 is made of low-release rubber, graphene-modified rubber, carbon nanotube-modified rubber, polyurethane thermoplastic elastomer, etc., or the first core 21 is a structure that encapsulates deionized water, polyethylene suspension, PVS suspension, plant slurry, etc., such as a low-density polyethylene membrane or ion exchange membrane.

[0030] Preferably, it further includes a filter element connector 22, which is connected to the second core 24; the second core 24 further includes a bottom hook 2408; the first frame 11 and the second frame 12 further include a bottom buckle 1112; the width of the bottom hook 2408 is less than that of the bottom buckle 1112 and it is fastened to the bottom buckle 1112. The filter element connector 22 is connected to the second core 24 to connect the filter media 23 to the opposite side edges of the filter media 23, serving as a lifting handle. The second core 24 is fastened to the second frame 12. The second frame 12 and the second core 24 are fastened together to fix the filter element 2 to the frame 1. When the filter reaches the end of its service life, it is pulled upward along the filter element connector 22, and the second core 24 flips and disengages from the connection of the second frame 12, allowing the filter element 2 to be removed from the opening of the frame 1. The replacement filter element 2 is inserted from the opening of the frame 1, the filter element connector 22 extends, and the second core 24 flips under its own weight to fit against the core base 2404 and the second frame 12. The second core 24 and the second frame 12 are fastened together, and the filter element 2 is fixed to the frame 1. The second core 24 does not require manual adjustment of its position and is automatically fastened to the second frame 12 in one step, which can save on the labor cost of maintaining and replacing the filter. The filter element connector 22 is located on the top edge of the filter element 2, and the width of the filter element 2 is appropriate. The distance between the filter element connectors 22 and the lifting position meet the requirements of human operating comfort. It can be operated by a single person and can be easily replaced.

[0031] Furthermore, a pull tab may be provided in the middle of the filter element connector 22. The pull tab is built into the filter media 23. When it is necessary to move the filter element 2, the pull tab is flipped out. The pull tab can effectively prevent accidental contact with the filter element connector 22, which would cause the filter element 2 to detach from the frame 1.

[0032] Preferably, both the bottom buckle 1112 and the bottom hook 2408 have smooth surfaces.

[0033] Preferably, the width of the short side 2102 of the first core 21 is smaller than that of the bottom buckle 1112 and is fastened to the bottom buckle 1112.

[0034] Preferably, the length of the bottom plate 1111 is greater than the distance between the outer wall 1103 and the inner wall 1109, and the distance between the side of the upper flange 1101 away from the top surface 1106 and the top surface 1106 is not greater than the distance between the side of the lower flange 1104 near the bottom plate 1111 and the side of the bottom plate 1111 away from the lower flange 1104.

[0035] Preferably, the first frame 11 further includes an upper partition 1108 and a lower partition 1110, which divide the interior of the first frame 11 into an outer cavity 1102 and an inner cavity 1107. The frame connector 13 also includes a nail 14, which passes through the outer cavity 1102 and connects the first frame 11 and the second frame 12 through the nail 14.

[0036] Furthermore, in the outer cavity 1102, the upper partition 1108 and the lower partition 1110 have the same length and the same thickness. Furthermore, the width of the outer cavity 1102 is 10-50% greater than the thickness of the frame connector 13, preferably 20-30%. Furthermore, the top surface 1106 can be perpendicular to the outer wall 1103, or it can be at an angle of less than 90° to the outer wall 1103, preferably 85-90°. The tilt angle is beneficial for relying on the weight of the upper filter to tightly fit the upper filter onto the surface of the lower filter, thereby enhancing the sealing between the upper and lower filters.

[0037] Furthermore, the frame connector 13 can also be an L-shaped double-forked structure, with the forks fixed in the outer cavity 1102 and the inner cavity 1107 respectively.

[0038] Preferably, the outer teeth 2402 and the inner teeth 2405 mesh, the width of the inner cavity 2407 of the core is greater than the distance between the outer teeth 2402 and the inner teeth 2405, the thickness of the core base 2404 is greater than the thickness of the extension 2401, the outer wall 2403 of the core, and the inner wall 2406 of the core, the density of the core base 2404 is not less than the density of the extension 2401, the outer wall 2403 of the core, and the inner wall 2406 of the core, and the side of the bottom hook 2408 away from the inner cavity 2407 of the core is arc-shaped.

[0039] Preferably, the length of the bottom plate 1111 is greater than the distance between the outer wall 1103 and the inner wall 1109, and the distance between the side of the upper flange 1101 away from the top surface 1106 and the top surface 1106 is not greater than the distance between the side of the lower flange 1104 near the bottom plate 1111 and the side of the bottom plate 1111 away from the lower flange 1104.

[0040] Furthermore, the width of the upper flange 1101 on the side away from the top surface 1106 is not greater than the width of the lower flange 1104 on the side away from and perpendicular to the outer wall 1103, leaving room for filter assembly tolerances and ensuring that the upper filter is completely embedded in the upper surface of the lower filter.

[0041] Preferably, the outer teeth 2402 and the inner teeth 2405 mesh, the width of the inner cavity 2407 of the core is greater than the distance between the outer teeth 2402 and the inner teeth 2405, the thickness of the core base 2404 is greater than the thickness of the extension 2401, the outer wall 2403 of the core, and the inner wall 2406 of the core, the density of the core base 2404 is not less than the density of the extension 2401, the outer wall 2403 of the core, and the inner wall 2406 of the core, and the side of the bottom hook 2408 away from the inner cavity 2407 of the core is arc-shaped.

[0042] Preferably, the filter element connector 22 is fixed by the engagement of the outer teeth 2402 and the inner teeth 2405, with the side near the outer teeth 2402 close to the edge of the filter material 23.

[0043] In actual production, as an example, frame 1 is 1200mm long, 700mm wide, and 80mm high, and can be stacked with three layers of chemical filters, each containing filter media 23 for removing acid, alkali, and VOC gaseous molecules. When purifying polluted gas at an airflow of 1361m³ / h, the total filter resistance was measured to be 40Pa. The initial filtration efficiencies for acid, alkali, and VOC gaseous molecules were 99.1%, 98.9%, and 99.7%, respectively, achieving a cleanliness level of ISO 4.

[0044] As described above, the self-sealing, stackable, and easily removable filter of this invention eliminates the need for adhesive bonding between the frame and filter element. The frame is recyclable and requires no repeated disassembly or reassembly. The filter element can be easily replaced within the frame, reducing packaging and transportation costs, handling time, and solid waste and / or hazardous waste disposal costs. The upper filter is embedded within the lower filter, achieving a seal based on its own weight. This reduces labor costs associated with seal installation, minimizes assembly steps, and reduces the impact of released gas from the seal on the filter's application environment. The upper and lower flanges of the frame are located on the outer surface, protecting the frame's outer surface and reducing the risk of scratches, dents, and severe deformation during production, assembly, transportation, and installation. This also enhances the filter's lateral load-bearing capacity, increasing the overall packaging weight and reducing packaging and transportation costs. The second core element in the filter element flips under its own weight to fit against the second frame, and the two interlock, fixing the filter element to the frame. No manual adjustment is required; the one-step self-locking mechanism saves on labor costs for filter maintenance and replacement. The second core can simultaneously fix the filter media edge folds and the filter element connectors, which helps reduce processes, saves adhesive usage, and reduces filter gas release. The spacing and lifting position of the filter element connectors in the filter element meet the requirements of human operating comfort, allowing for single-person operation and easy replacement. The short side of the first core becomes thinner due to the pressure of the filter element's own weight, while the long side becomes thicker accordingly, which helps to fill the gap between the frame and the filter element, making the two tightly connected, increasing the filter's sealing performance, and improving purification efficiency.

Claims

1. A self-sealing, stackable, and easily removable filter, comprising a frame (1) and a filter element (2), characterized in that: The filter element (2) is detachably disposed in the frame (1). The frame (1) includes an L-shaped first frame (11), a frame connector (13), and an L-shaped second frame (12) that is perpendicularly connected to the first frame (11) through the frame connector (13). The first frame (11) and the second frame (12) also include a bottom buckle (1112). The first frame (11) and the second frame (12) are both hollow frames with the same cross-section, including an upper flange (1101), an outer wall (1103), a lower flange (1104), a lower concave flange (1105), a top surface (1106), an inner wall (1109), and a bottom plate (1111). The upper flange (1101) and the lower flange (1104) are located on the outer side of the frame (1), the upper flange (1101) and the lower concave flange (1105) are fitted together, and the top surface (1106) is attached to the bottom plate (1111). The upper flange (1101) of the first frame (11) is higher than the top surface (1106), and the upper surface of the filter element (2) is lower than the top surface (1106). The filter element (2) includes a filter material (23), a first core (21) that is aligned with the top edge of the filter material (23) and attached to the lower edge, and a second core (24) that is perpendicular to the first core (21). The first core (21) is a sealing element formed by wrapping fluid with an elastomer or a highly elastic membrane, including a short side (2102) and a long side (2101), wherein the short side (2102) is attached to the fold on the air outlet side of the filter material (23); The second core (24) includes an extension (2401), external teeth (2402), core outer wall (2403), core base (2404), internal teeth (2405), core inner wall (2406), and core inner cavity (2407), wherein the external teeth (2402) mesh with the internal teeth (2405); the second core (24) also includes a bottom hook (2408), wherein both ends of the filter material (23) are connected to the core inner cavity (2407); the width of the bottom hook (2408) is smaller than that of the bottom buckle (1112) and it is fastened to the bottom buckle (1112).

2. The self-sealing, stackable, and easily removable filter as described in claim 1, characterized in that: It also includes a filter element connector (22), which is connected to the second core (24).

3. The self-sealing, stackable, and easily removable filter as described in claim 1, characterized in that: Both the bottom buckle (1112) and the bottom hook (2408) have smooth surfaces.

4. The self-sealing, stackable, and easily removable filter as described in claim 1, characterized in that: The width of the short side (2102) of the first core (21) is smaller than that of the bottom buckle (1112) and is fastened to the bottom buckle (1112).

5. The self-sealing, stackable, and easily removable filter as described in claim 1, characterized in that: The length of the base plate (1111) is greater than the distance between the outer wall (1103) and the inner wall (1109). The distance between the side of the upper flange (1101) away from the top surface (1106) and the top surface (1106) is not greater than the distance between the side of the lower flange (1104) close to the base plate (1111) and the side of the base plate (1111) away from the lower flange (1104).

6. The self-sealing, stackable, and easily removable filter as described in claim 5, characterized in that: The first frame (11) further includes an upper partition (1108) and a lower partition (1110). The upper partition (1108) and the lower partition (1110) divide the interior of the first frame (11) into an outer cavity (1102) and an inner cavity (1107). The frame connector (13) also includes a nail (14). The frame connector (13) passes through the outer cavity (1102) and connects the first frame (11) and the second frame (12) through the nail (14).

7. The self-sealing, stackable, and easily removable filter as described in claim 1, characterized in that: The width of the inner cavity (2407) of the core is greater than the distance between the outer teeth (2402) and the inner teeth (2405). The thickness of the core base (2404) is greater than the thickness of the extension (2401), the outer wall (2403), and the inner wall (2406). The density of the core base (2404) is not less than the density of the extension (2401), the outer wall (2403), and the inner wall (2406). The side of the bottom hook (2408) away from the inner cavity (2407) of the core is arc-shaped.

8. The self-sealing, stackable, and easily removable filter as described in claim 2, characterized in that: The filter element connector (22) is fixed by the engagement of the outer teeth (2402) and the inner teeth (2405), with the side near the outer teeth (2402) close to the edge of the filter material (23).

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