Intermediate air filter with filter element convenient to replace

Abstract

The utility model provides an intermediate air filter with a filter element convenient to replace, and relates to the technical field of intermediate air filters, the intermediate air filter comprises a filter material, the filter material is folded into a V-shaped wave shape, the surface of the filter material is sleeved with a support frame, and the front side of the support frame is detachably connected with a quick release structure; a sealing structure is arranged on the rear side of the quick release structure, and the surface of the sealing structure is respectively matched with the filter material and the support frame for use. By arranging the filter material, the support frame, the quick release structure and the sealing structure, the filter efficiency can be remarkably improved, the stability and durability of the structure are enhanced, the filter area is increased by the V-shaped wave-shaped filter material, the filter effect is improved, the support frame provides stable support for the filter material, the integrity of the structure is ensured, and the service life of the filter material is prolonged. The quick release structure facilitates replacement and maintenance of the filter material, the operation convenience is improved, the sealing structure effectively prevents leakage, and the sealing performance of the filter system is ensured.

Description

Technical Field

[0001] This utility model relates to the field of intermediate air filter technology, and more particularly to an intermediate air filter with an easy-to-replace filter element. Background Technology

[0002] Medium-efficiency air filters, also known as medium-duty air filters, play a crucial role in air filtration systems. Belonging to the F-series, they effectively filter out medium-sized particles in the air. They are primarily divided into bag filters and non-bag filters. Bag filters include levels such as F5, F6, F7, F8, and F9, while non-bag filters include panel filters (FB), pleated filters (FS), and combination filters (FV). The working principle of medium-efficiency air filters is mainly through the interception, adsorption, and diffusion of airborne particles by the filter media, thereby purifying the air. Their filtration efficiency is typically measured using colorimetry. The filtration efficiency is approximately 40-50% for F5, 60-70% for F6, 75-85% for F7, 85-95% for F8, and as high as 99% for F9.

[0003] In existing technologies, medium-efficiency air filters are needed in industrial purification fields such as central air conditioning ventilation systems, pharmaceuticals, hospitals, electronics, and food. They can not only serve as air purification equipment in these places, but also as pre-filters for high-efficiency air filters to reduce the load on high-efficiency filters and extend their service life. However, some existing medium-efficiency air filters are designed in a way that makes it difficult to remove or insert the filter media. Tools are needed to open the filter housing or there are complicated fixing devices. At the same time, poor sealing around the filter leads to unsatisfactory filtration effect, and slow filter media replacement speed leads to a decrease in the efficiency of medium-efficiency air filters. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a medium-efficiency air filter with easy filter element replacement, which can facilitate the replacement of filter media and improve the sealing around the filter media, so as to solve the problems of difficult filter media replacement and poor sealing in existing medium-efficiency air filters.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a medium-sized air filter that facilitates filter element replacement, comprising filter media, wherein the filter media is folded into a V-shaped wave shape, a support frame is fitted on the surface of the filter media, and a quick-release structure is detachably connected to the front side of the support frame.

[0006] The quick-release structure is provided with a sealing structure on the rear side, and the surface of the sealing structure is used in conjunction with the filter material and the support frame.

[0007] Furthermore, the quick-release structure includes a limiting frame located on the front side of the support frame. Connecting posts are fixedly connected to the four corners of the rear side of the limiting frame. The rear side of the connecting posts penetrates the support frame and extends to the rear side of the support frame. A snap-fit ​​protrusion is fixedly connected to the rear side of the connecting posts. An opening is provided inside the support frame to cooperate with the snap-fit ​​protrusion and the connecting posts. The sealing structure is located on the rear side of the limiting frame.

[0008] Furthermore, the sealing structure includes a lower pressure plate, which is used to seal the front perimeter of the filter media. The lower pressure plate has protrusions on both sides that cooperate with the filter media. The front side of the lower pressure plate contacts and cooperates with the rear side of the limiting frame. The surface of the lower pressure plate is movably connected to the interior of the support frame. A positioning plate is provided on the rear side of the filter media. The positioning plate is used to seal the rear perimeter of the filter media. Both sides of the positioning plate have protrusions that cooperate with the filter media, and the lower pressure plate and the positioning plate are staggered.

[0009] Furthermore, the diameter of the top of the opening is larger than the diameter of the snap-fit ​​protrusion, and the interior of the opening is used in conjunction with the surface of the connecting post, and its diameter is smaller than the diameter of the snap-fit ​​protrusion.

[0010] Furthermore, screws are provided at the four corners of the front side of the limiting frame. The threaded end of the screw penetrates the limiting frame and extends to the surface of the lower pressure plate. The surface of the lower pressure plate is provided with a slot for the screw to be inserted.

[0011] Furthermore, mounting holes are provided at the top and bottom of both sides of the limiting frame and the support frame, and a support sleeve is provided at the rear side of the mounting hole. The front side of the support sleeve is fixedly connected to the rear side of the support frame.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model, by setting filter media, support frame, quick-release structure and sealing structure, can significantly improve filtration efficiency and enhance the stability and durability of the structure. The V-shaped wave-shaped filter media increases the filtration area and improves the filtration effect. The support frame provides stable support for the filter media and ensures the integrity of the structure. The quick-release structure facilitates the replacement and maintenance of the filter media and improves the ease of operation. The sealing structure effectively prevents leakage and ensures the sealing performance of the filtration system.

[0014] 2. This utility model features a quick-release structure, which makes the installation and disassembly of the limiting frame and the support frame more convenient. Through the cooperation of the connecting column and the snap-fit ​​protrusion with the internal opening of the support frame, the limiting frame can be quickly fixed and released without complicated operating steps or tool assistance, thereby greatly improving the assembly and disassembly efficiency. This structural design also ensures a stable connection between the limiting frame and the support frame, guaranteeing the stability and reliability of the overall structure.

[0015] 3. This utility model, by setting a lower pressure plate and a positioning plate, can effectively achieve sealing of the front and rear sides of the filter media. The lower pressure plate has a raised design on both sides, which cooperates with the filter media to enhance the tightness of the seal. At the same time, the contact cooperation between the front side of the lower pressure plate and the rear side of the limiting frame, as well as the movable connection between the surface of the lower pressure plate and the inside of the support frame, further ensure the stable installation and sealing effect of the filter media. The positioning plate also has raised sides that cooperate with the filter media, and it cooperates with the lower pressure plate in an alternating manner to enhance the fixation of the filter media and improve the overall sealing performance.

[0016] 4. By setting an opening and a snap-fit ​​protrusion, this utility model can ensure that the snap-fit ​​protrusion is firmly snapped into the opening. The diameter of the top of the opening is larger than the diameter of the snap-fit ​​protrusion, which facilitates the snap-fit ​​protrusion to pass smoothly through the opening and move to the rear side of the opening. The inner diameter of the opening is smaller than the diameter of the snap-fit ​​protrusion, which can effectively prevent the snap-fit ​​protrusion from coming out of the opening, thereby enhancing the stability and reliability of the structure, simplifying the assembly process, improving assembly efficiency, and ensuring a firm connection between the connecting post and the snap-fit ​​protrusion.

[0017] 5. By setting screws, the threaded end of the screws can penetrate the limiting frame and be firmly locked into the slot of the lower pressure plate. This allows the limiting frame to apply a downward force to the surface of the lower pressure plate. By adjusting the position of the screws, filter media of different thicknesses can be sealed. At the same time, because the screws are locked into the slots, the surface of the lower pressure plate is movably connected to the inside of the support frame, which also limits the position of the limiting frame, making it less prone to loosening and improving the stability and reliability of the overall structure.

[0018] 6. By setting mounting holes and support sleeves, this utility model can enhance the stability and firmness of the overall structure. The design of the mounting holes facilitates quick and accurate installation and positioning with other components, and makes it easy for mounting bolts to pass through the limit frame to fix the support frame. The setting of the support sleeve further enhances the support strength of the installation part and provides a certain amount of movement space for the snap-fit ​​protrusion. Attached Figure Description

[0019] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a rear-view perspective view of the present invention;

[0022] Figure 3 This is an exploded view of the present invention;

[0023] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0024] Figure 5 for Figure 3 A magnified view of a section at point B.

[0025] In the diagram: 1. Filter media; 2. Support frame; 3. Limiting frame; 4. Connecting column; 5. Snap-fit ​​protrusion; 6. Opening; 7. Lower pressure plate; 8. Positioning plate; 9. Screw; 10. Slot; 11. Mounting hole; 12. Support sleeve. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of this utility model.

[0028] An intermediate air filter that is easy to replace the filter element includes filter media 1, which is folded into a V-shaped wave shape. A support frame 2 is fitted on the surface of the filter media 1, and a quick-release structure is detachably connected to the front side of the support frame 2.

[0029] The quick-release structure has a sealing structure on the rear side, and the surface of the sealing structure is used in conjunction with the filter material 1 and the support frame 2 respectively.

[0030] Please see Figure 2 , Figure 3 , Figure 4 and Figure 5 , Figure 2 This is a rear-view perspective view of the present invention; Figure 3 This is an exploded view of the present invention; Figure 4 for Figure 3 A magnified view of a section at point A in the middle; Figure 5 for Figure 3 A magnified view of a section at point B.

[0031] The quick-release structure includes a limiting frame 3, which is located on the front side of the support frame 2. Connecting posts 4 are fixedly connected to the four corners of the rear side of the limiting frame 3. The rear side of the connecting posts 4 penetrates the support frame 2 and extends to the rear side of the support frame 2. A snap-fit ​​protrusion 5 is fixedly connected to the rear side of the connecting posts 4. An opening 6 is provided inside the support frame 2 to cooperate with the snap-fit ​​protrusion 5 and the connecting posts 4. A sealing structure is located on the rear side of the limiting frame 3. This quick-release structure makes the installation and disassembly of the limiting frame 3 and the support frame 2 extremely convenient. Through the cooperation of the connecting posts 4 and the snap-fit ​​protrusion 5 with the opening 6 inside the support frame 2, the limiting frame 3 can be quickly fixed and released without complicated operating steps or tool assistance, thus greatly improving assembly and disassembly efficiency. This structural design also ensures a stable connection between the limiting frame 3 and the support frame 2, guaranteeing the stability and reliability of the overall structure.

[0032] The sealing structure includes a lower pressure plate 7, which is used to seal the front perimeter of the filter media 1. The lower pressure plate 7 has protrusions on both sides that mate with the filter media 1. The front side of the lower pressure plate 7 contacts the rear side of the limiting frame 3. The surface of the lower pressure plate 7 is movably connected to the interior of the support frame 2. A positioning plate 8 is provided on the rear side of the filter media 1, which is used to seal the rear perimeter of the filter media 1. Both sides of the positioning plate 8 have protrusions that mate with the filter media 1, and the lower pressure plate 7 and the positioning plate 8 are staggered, effectively achieving sealing of the front and rear perimeters of the filter media 1. The protrusions on both sides of the lower pressure plate 7, mate with the filter media 1, enhance the tightness of the seal. Simultaneously, the contact between the front side of the lower pressure plate 7 and the rear side of the limiting frame 3, as well as the movable connection between the surface of the lower pressure plate 7 and the interior of the support frame 2, further ensure the stable installation and sealing effect of the filter media 1. The positioning plate 8 also has protrusions on both sides that mate with the filter media 1, and its staggered mate with the lower pressure plate 7 enhances the fixation of the filter media 1 and improves the overall sealing performance.

[0033] The diameter of the top of the opening 6 is larger than the diameter of the snap-fit ​​protrusion 5. The interior of the opening 6 is used to mate with the surface of the connecting post 4, and its diameter is smaller than the diameter of the snap-fit ​​protrusion 5. This ensures that the snap-fit ​​protrusion 5 is securely snapped into the opening 6. The diameter of the top of the opening 6 is larger than the diameter of the snap-fit ​​protrusion 5, which facilitates the snap-fit ​​protrusion 5 to pass smoothly through the opening 6 and move to the rear side of the opening 6. The interior diameter of the opening 6 is smaller than the diameter of the snap-fit ​​protrusion 5, which effectively prevents the snap-fit ​​protrusion 5 from coming out of the opening 6. This enhances the stability and reliability of the structure, simplifies the assembly process, improves assembly efficiency, and also ensures a firm connection between the connecting post 4 and the snap-fit ​​protrusion 5.

[0034] Screws 9 are provided at the four corners of the front side of the limiting frame 3. The threaded end of the screw 9 passes through the limiting frame 3 and extends to the surface of the lower pressure plate 7. The surface of the lower pressure plate 7 has a groove 10 for the screw 9 to be inserted. The threaded end of the screw 9 can pass through the limiting frame 3 and be firmly inserted into the groove 10 of the lower pressure plate 7, so that the limiting frame 3 can apply a downward force to the surface of the lower pressure plate 7. By adjusting the position of the screw 9, the filter media 1 of different thicknesses can be sealed. At the same time, since the screw 9 is inserted into the groove 10, the surface of the lower pressure plate 7 is movably connected to the inside of the support frame 2, which also limits the position of the limiting frame 3, making it less prone to loosening and improving the stability and reliability of the overall structure.

[0035] Mounting holes 11 are provided at the top and bottom of both sides of the limiting frame 3 and the support frame 2. A support sleeve 12 is provided at the rear of the mounting hole 11. The front side of the support sleeve 12 is fixedly connected to the rear side of the support frame 2, which can enhance the stability and firmness of the overall structure. The design of the mounting hole 11 facilitates quick and accurate installation and positioning with other components, and makes it easy for the mounting bolts to pass through the limiting frame 3 to fix the support frame 2. The setting of the support sleeve 12 further enhances the support of the installation part and provides a certain amount of movement space for the snap-fit ​​protrusion 5.

[0036] Working Principle: The working principle of this utility model is mainly achieved through the cooperation of quick-release structure and sealing structure. During installation, the support frame 2 is first fixed to the position where the filter needs to be installed with bolts. The filter material 1 is folded into a V-shaped wave and placed on the positioning plate 8 inside the support frame 2. The limiting frame 3 is fixed to the front side of the support frame 2 through the quick-release structure. The connecting column 4 and the snap-fit ​​protrusion 5 pass through the opening 6 of the support frame 2. Since the diameter of the top of the opening 6 is larger than the diameter of the snap-fit ​​protrusion 5, the snap-fit ​​protrusion 5 can pass through the opening 6 smoothly. When the snap-fit ​​protrusion 5 is completely inside the opening 6, since the inner diameter of the opening 6 is smaller than the diameter of the snap-fit ​​protrusion 5, the snap-fit ​​protrusion 5 is firmly snapped into the opening 6, thereby realizing the fixed connection between the limiting frame 3 and the support frame 2. The lower pressure plate 7 is used for sealing the front four sides of the filter material 1. Its two side protrusions cooperate with the filter material 1 to enhance the tightness of the seal. The front side of the lower pressure plate 7 and the rear side of the limiting frame 3 are connected. The contact fit and the movable connection between the surface of the lower pressure plate 7 and the interior of the support frame 2 further ensure the stable installation and sealing effect of the filter media 1. The positioning plate 8 is used for sealing the rear perimeter of the filter media 1. Its two sides are also protrusions that cooperate with the filter media 1. They are staggered with the lower pressure plate 7 to enhance the fixation of the filter media 1 and the overall sealing performance. By adjusting the position of the screw 9 on the front side of the limiting frame 3, the sealing of filter media 1 of different thicknesses can be achieved. The threaded end of the screw 9 passes through the limiting frame 3 and is firmly inserted into the slot 10 of the lower pressure plate 7, so that the limiting frame 3 applies a downward force to the surface of the lower pressure plate 7, thereby achieving the sealing effect. When the filter media 1 needs to be replaced, simply unscrew the screw 9 out of the slot 10, move the limiting frame 3 upward, and the limiting frame 3 drives the connecting column 4 and the clamping protrusion to move. Then move the limiting frame 3, the connecting column 4 and the clamping protrusion forward, so that the connecting column 4 is disengaged from the interior of the opening 6. Remove the lower pressure plate 7, and the filter media 1 can be replaced.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An intermediate air filter facilitating replacement of a filter cartridge, characterized by: Includes filter material (1), the filter material (1) is folded into a V-shaped wave shape, the surface of the filter material (1) is fitted with a support frame (2), and the front side of the support frame (2) is detachably connected with a quick-release structure; The quick-release structure is provided with a sealing structure on the rear side, and the surface of the sealing structure is used in conjunction with the filter material (1) and the support frame (2).

2. The medium efficiency air filter with easy-to-change filter element according to claim 1, characterized in that: The quick-release structure includes a limiting frame (3), which is located on the front side of the support frame (2). Connecting posts (4) are fixedly connected to the four corners of the rear side of the limiting frame (3). The rear side of the connecting posts (4) passes through the support frame (2) and extends to the rear side of the support frame (2). A snap-fit ​​protrusion (5) is fixedly connected to the rear side of the connecting posts (4). An opening (6) is provided inside the support frame (2) to cooperate with the snap-fit ​​protrusion (5) and the connecting posts (4). The sealing structure is located on the rear side of the limiting frame (3).

3. An intermediate air filter with a replaceable filter element as defined in claim 2, characterized in that: The sealing structure includes a lower pressure plate (7), which is used to seal the front periphery of the filter material (1). The two sides of the lower pressure plate (7) are raised and cooperate with the filter material (1). The front side of the lower pressure plate (7) contacts and cooperates with the rear side of the limiting frame (3). The surface of the lower pressure plate (7) is movably connected to the interior of the support frame (2). A positioning plate (8) is provided on the rear side of the filter material (1). The positioning plate (8) is used to seal the rear periphery of the filter material (1). Both sides of the positioning plate (8) are raised and cooperate with the filter material (1). The lower pressure plate (7) and the positioning plate (8) are staggered.

4. A medium-sized air filter with an easy-to-replace filter element according to claim 2, characterized in that: The diameter of the top of the opening (6) is greater than the diameter of the snap-fit ​​protrusion (5), and the interior of the opening (6) is used in conjunction with the surface of the connecting post (4), and its diameter is smaller than the diameter of the snap-fit ​​protrusion (5).

5. The medium efficiency air filter with easy-to-change filter element according to claim 3, characterized in that: Screws (9) are provided at the four corners of the front side of the limiting frame (3). The threaded end of the screw (9) passes through the limiting frame (3) and extends to the surface of the lower pressure plate (7). The surface of the lower pressure plate (7) is provided with a slot (10) for the screw (9) to be inserted.

6. The medium efficiency air filter with easy-to-change filter element according to claim 2, characterized in that: Mounting holes (11) are provided at the top and bottom of both sides of the limiting frame (3) and the support frame (2). A support sleeve (12) is provided on the rear side of the mounting hole (11), and the front side of the support sleeve (12) is fixedly connected to the rear side of the support frame (2).

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