A high efficiency filter

Abstract

The application relates to the filter field, in particular to a high-efficiency filter which comprises a box body and a filter core assembly, a frame is arranged on the outer periphery of the box body, a circumferential sealing groove is formed between the frame and the box body, a limiting assembly and an air bag group are arranged in the sealing groove, the limiting assembly is arranged in cooperation with the air bag group and is used for limiting the displacement of the air bag group in the sealing groove, the air bag group comprises four air bag bodies corresponding to the side edges of the box body, and the air bag bodies are embedded in the sealing groove in a head-to-tail mode. According to the application, the circumferential sealing groove is formed between the box body and the frame, the air bag group is arranged in the sealing groove, when the filter is connected with a mounting frame, the outer side of the mounting frame is sealed in cooperation with the air bag group, and leakage of unfiltered air is avoided. Compared with the sealing glue, the air bag can reduce the production cost and has a long service life, so that the maintenance workload is reduced.

Description

Technical Field

[0001] This application relates to the technical field of filters, and in particular to a high-efficiency filter. Background Technology

[0002] High-efficiency particulate air (HEPA) filters are suitable for end-point filtration in air conditioning and ventilation systems. They are primarily used to filter small dust particles smaller than 1μm and can also filter out airborne bacteria. HEPA filters mainly consist of an outer frame, filter paper or filter cloth, separators (some may not have separators), and end caps.

[0003] In related technologies, to ensure air cleanliness and avoid air leakage caused by loose connections between the HEPA filter and the mounting frame, liquid-filled HEPA filters are commonly used. These filters have a liquid-filled groove along the edge of the outer frame, which is filled with a sealant. By using a sealant in the groove, the sealing performance between the HEPA filter and the mounting frame is improved, preventing the leakage of unfiltered air.

[0004] The problems with the related technology are that, due to the limitations of the structure and materials of the liquid tank high-efficiency filter, it has a high production cost. Secondly, since it requires the use of colloid for sealing, the sealing material needs to be replaced regularly during use, which increases the cost of use and maintenance workload. Utility Model Content

[0005] To improve sealing performance while reducing operating costs and maintenance workload, this application provides a high-efficiency filter.

[0006] The high-efficiency filter provided in this application adopts the following technical solution:

[0007] A high-efficiency filter includes a housing and a filter element assembly. The filter element assembly is installed inside the housing. A frame is provided on the outer periphery of the housing. A circumferential sealing groove is formed between the frame and the housing. A limiting component and an airbag assembly are provided in the sealing groove. The limiting component and the airbag assembly are configured to limit the displacement of the airbag assembly in the sealing groove. The airbag assembly includes four airbags corresponding to each side of the housing. Each airbag is embedded in the sealing groove with its ends touching the ground.

[0008] Optionally, each of the airbag bodies is equipped with an inflation connector, and an inflation interface hole is provided on the frame. The inflation connector extends and is fixed in the inflation interface hole, and the inflation connector is used to connect to an inflation device.

[0009] Optionally, the limiting component includes four limiting plates arranged perpendicular to the bottom surface of the frame. The four limiting plates are respectively arranged at the joints of the four airbags. One end of each airbag abuts against the limiting plate, and the other end abuts against the inner sidewall of the frame.

[0010] Optionally, the limiting component includes a slot formed on the inner sidewall of the frame, the slot extending along the side of the frame and having an arc-shaped cross-section;

[0011] It also includes multiple anti-slip ribs spaced apart on the bottom wall of the frame. The multiple anti-slip ribs are divided into four groups corresponding to each airbag body, and each group of anti-slip ribs forms a certain angle with the extension direction of the corresponding airbag body.

[0012] Optionally, the frame is made of galvanized steel sheet or stainless steel with a thickness of -mm, and L-shaped reinforcing ribs are arranged at the four corners of the outer surface of the frame.

[0013] Optionally, each of the airbag bodies is made of EPDM rubber or fluororubber, and the cross-section of the airbag body in the inflated state is D-shaped, including a flat surface that fits against the bottom of the sealing groove and an arc surface facing outward from the sealing groove.

[0014] Optionally, it also includes a mounting frame having a main body that fits the shape of the housing, and an outwardly extending pressure plate formed at one end of the main body facing the sealing groove, the pressure plate being configured to cooperate with the airbag assembly in the sealing groove.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] 1. A circumferential sealing groove is formed between the housing and the frame, and an airbag assembly is installed within the sealing groove. When the filter is connected to the mounting frame, the outer side of the mounting frame cooperates with the airbag assembly to achieve a seal, preventing the leakage of unfiltered air. Compared with using sealing gel, using airbags can reduce production costs and has a longer service life, eliminating the need for regular replacement and thus reducing maintenance workload.

[0017] 2. The airbag assembly is configured to consist of four airbags. The limiting component is designed to work with each airbag to increase the friction between the inner walls of the airbag frame when the airbag is inflated, thereby limiting the displacement of the airbag in all directions and making the inflation more stable. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an embodiment of this application.

[0019] Figure 2 This is a top view of an embodiment of the present application.

[0020] Figure 3 This is a side view cross-sectional structural diagram of an embodiment of this application.

[0021] Figure 4 yes Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0022] Reference numerals: 1. Housing; 2. Filter element assembly; 3. Frame; 4. Sealing groove; 5. Limiting assembly; 51. Limiting plate; 52. Slot; 53. Anti-slip rib; 6. Airbag assembly; 61. Airbag body; 62. Inflation connector; 7. Reinforcing rib plate; 8. Mounting frame; 81. Main body; 82. Pressure plate. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0024] This application discloses a high-efficiency filter. (Refer to...) Figure 1 A high-efficiency filter includes a housing 1 and a filter element assembly 2. The housing 1 is a hollow rectangular frame structure that provides mechanical support for the filter element assembly 2 and ensures airtightness. It is preferably made of a metal frame. The filter element assembly 2 includes a filter medium and a separator. The separator is used to support the filter medium and form a uniform airflow channel within the housing 1. Depending on actual production and usage needs, the filter medium can be one or more of glass fiber filter paper, synthetic fiber materials, or nanofibers.

[0025] The aforementioned separators are categorized into separator-type and separator-less structures. Separator-type structures commonly use aluminum foil, offset paper, or plastic sheets, which are folded to form wavy layers, providing a stable airflow channel. Separator-less structures use hot melt adhesive or fiberglass strips instead of separators, fixing the filter media through ultrasonic welding or adhesive application to form a tight V-shaped pleat. Separator-type structures have a large filter media area and stable airflow velocity, making them suitable for high-airflow scenarios. Separator-less structures are smaller in size, lighter in weight, and have higher filtration efficiency, making them widely used in cleanrooms and medical equipment. In specific implementation, those skilled in the art can choose between separator-type and separator-less structures as needed, and no limitation is made here.

[0026] Reference Figure 1 A frame 3 is provided on the outer periphery of the housing 1. The frame 3 has an L-shaped cross-section, with one side connected to the housing 1 and the other side spaced apart from the housing 1, thereby forming a circumferential sealing groove 4 between the housing 1 and the frame 3. The sealing groove 4 has a U-shaped cross-section. Preferably, the frame 3 is made of galvanized steel plate or stainless steel with a thickness of 3-5mm.

[0027] Furthermore, an airbag assembly 6 is provided within the sealing groove 4. The airbag assembly 6 includes four airbag bodies 61 corresponding to each side of the housing 1. Each airbag body 61 is embedded end-to-end within the sealing groove 4. When the airbag body 61 is inflated, its cross-section is D-shaped. At this time, the airbag body 61 has a flat surface that fits against the bottom of the sealing groove 4 and an arc surface facing the opening of the sealing groove 4. To prevent the airbag body 61 from applying excessive pressure to the side wall of the frame 3 during inflation, which could cause deformation of the frame 3, L-shaped reinforcing ribs 7 are respectively arranged at the four corners of the outer surface of the frame 3 to improve the overall structural strength of the frame 3. Preferably, the airbag body 61 is made of EPDM rubber or fluororubber.

[0028] An installation frame 8 is provided on the outside of the housing 1. The installation frame 8 has a main body 81 that matches the shape of the housing 1. The main body 81 has a rectangular frame structure, and its inner frame dimensions match the outer contour dimensions of the housing 1. Its height is adapted to the thickness of the filter to ensure that there is no axial loosening after the filter is embedded. In some preferred embodiments of this application, the main body 81 of the installation frame 8 is made of 6061-T6 aluminum alloy profile with a wall thickness ≥3mm and an overall load-bearing strength ≥0.2MPa, so as to resist the lateral pressure generated when the sealing airbag is inflated and avoid frame deformation.

[0029] The mounting frame 8 also has a pressure plate 82 formed on the main body 81 facing the sealing groove 4 and extending outward. The pressure plate 82 is arranged opposite to the airbag assembly 6 in the sealing groove 4. Before installing the high-efficiency filter, each airbag 61 is first inflated, and then the high-efficiency filter is installed into the mounting frame 8 so that the pressure plate 82 of the mounting frame 8 is in full contact with the airbag assembly 6. Finally, the high-efficiency filter is connected and fixed to the mounting frame 8 to meet the sealing installation requirements.

[0030] To facilitate the inflation and deflation of each airbag 61, the following structure is adopted.

[0031] Reference Figure 3 and 4 Each airbag 61 is equipped with an inflation connector 62, which connects to the internal cavity of the airbag 61 and extends outward. An inflation port is provided on the upper part of the frame 3, and the end of the inflation connector 62 furthest from the airbag 61 extends into the inflation port. The high-efficiency filter also includes an external inflation device, and the inflation connector 62 is used to connect to this device. The inflation device includes a manual air pump or an electric air pump. To control the inflation pressure of the airbag 61, a pressure limit valve can be installed on the inflation device; this part is prior art and will not be described in detail here.

[0032] A limiting component 5 is also provided in the sealing groove 4. The limiting component 5 is configured in conjunction with the airbag assembly 6 to limit the displacement of the airbag assembly 6 in the sealing groove 4. Specifically, the limiting component 5 includes four limiting plates 51 arranged perpendicular to the bottom surface of the frame 3. The four limiting plates 51 are respectively arranged at the end joints of the four airbag bodies 61. Each limiting plate 51 has a pressure-bearing surface corresponding to the end face of each airbag body 61. When each airbag body 61 is inflated, one end abuts against the pressure-bearing surface of the limiting plate 51, and the other end abuts against the inner sidewall of the frame 3, thereby limiting the axial displacement of the airbag body 61.

[0033] It should be noted that, in order to ensure that the pressure plate 82 and the airbag 61 can make full contact when the mounting frame 8 is connected to the box 1, the height of the limiting plate 51 should be lower than the height of the airbag 61 after inflation.

[0034] Furthermore, the limiting component 5 also includes a slot 52 formed on the inner sidewall of the frame 3. The slot 52 extends along the side of the frame and has an arc-shaped cross-section. The edge of the slot 52 smoothly transitions to the inner sidewall of the frame 3. When the airbag 61 is inflated, it is partially embedded in the slot 52 to limit the vertical displacement of the airbag 61.

[0035] Furthermore, the limiting component 5 also includes multiple anti-slip ribs 53 spaced apart on the inner bottom wall of the frame 3. The anti-slip ribs 53 are divided into four groups corresponding to each airbag body 61. Each group of protective ribs forms a certain angle with the extension direction of the corresponding airbag body 61 to increase the friction between the airbag body 61 and the frame 3, and further limit the displacement of the airbag body 61.

[0036] This application provides a high-efficiency filter, which features a circumferential sealing groove 4 formed between the housing 1 and the frame 3. An airbag assembly 6 is disposed within the sealing groove 4. When the filter is connected to the mounting frame 8, the outer side of the mounting frame 8 cooperates with the airbag assembly 6 to achieve a seal, preventing the leakage of unfiltered air. Compared to using sealing gel, using airbags reduces production costs and has a longer service life, eliminating the need for regular replacement and thus reducing maintenance workload.

[0037] The airbag assembly 6 is configured to consist of four airbag bodies 61. The limiting component 5 is configured to cooperate with each airbag body 61. When the airbag body 61 is inflated, it can increase the friction between the inner walls of its frame 3, limit the displacement of the airbag body 61 in all directions, and make the inflation more stable.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-efficiency filter, comprising a housing (1) and a filter element assembly (2), wherein the filter element assembly (2) is installed inside the housing (1), and a frame (3) is provided on the outer periphery of the housing (1), wherein a circumferential sealing groove (4) is formed between the frame (3) and the housing (1), characterized in that: The sealing groove (4) is provided with a limiting component (5) and an airbag assembly (6). The limiting component (5) and the airbag assembly (6) are configured to limit the displacement of the airbag assembly (6) in the sealing groove (4). The airbag assembly (6) includes four airbag bodies (61) corresponding to each side of the box body (1). Each airbag body (61) is embedded in the sealing groove (4) with its ends connected to the ground.

2. The high-efficiency filter according to claim 1, characterized in that: Each of the airbag bodies (61) is equipped with an inflation connector (62), and an inflation interface hole is provided on the frame (3). The inflation connector (62) extends and is fixed in the inflation interface hole. The inflation connector (62) is used to connect an inflation device.

3. The high-efficiency filter according to claim 1, characterized in that: The limiting component (5) includes four limiting plates (51) arranged perpendicular to the bottom surface of the frame (3). The four limiting plates (51) are respectively arranged at the end-to-end junction of the four airbag bodies (61). One end of each airbag body (61) abuts against the limiting plate (51), and the other end abuts against the inner sidewall of the frame (3).

4. The high-efficiency filter according to claim 1, characterized in that: The limiting component (5) includes a slot (52) opened on the inner sidewall of the frame (3), the slot (52) extending along the side of the frame and having an arc-shaped cross-section; It also includes multiple anti-slip ribs (53) spaced apart on the inner bottom wall of the frame (3). The multiple anti-slip ribs (53) are divided into four groups corresponding to each airbag body (61). Each group of anti-slip ribs (53) forms a certain angle with the extension direction of the corresponding airbag body (61).

5. The high-efficiency filter according to claim 1, characterized in that: The frame (3) is made of galvanized steel plate or stainless steel with a thickness of 3-5mm. L-shaped reinforcing ribs (7) are arranged at the four corners of the outer surface of the frame (3).

6. The high-efficiency filter according to claim 5, characterized in that: Each of the airbag bodies (61) is made of EPDM rubber or fluororubber. In the inflated state, the cross section of the airbag body (61) is D-shaped, including a flat surface that fits against the bottom of the sealing groove (4) and an arc surface facing the outside of the sealing groove (4).

7. The high-efficiency filter according to claim 1, characterized in that: It also includes an installation frame (8), which has a main body (81) that matches the shape of the box (1). A pressure plate (82) extending outward is formed at one end of the main body (81) facing the sealing groove (4). The pressure plate (82) is configured to cooperate with the airbag assembly (6) in the sealing groove (4).

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