Double-layer composite filter screen for HEPA filter

Abstract

The utility model discloses a double-layer composite filter screen for an HEPA (High Efficiency Particulate Air) filter, which relates to the technical field of composite filter screens and comprises a box body, an input pipe is fixedly arranged at one end of the box body, an output pipe is fixedly arranged at the other end of the box body, a suction port cover is fixedly arranged at the other end of the input pipe, and a baffle is arranged at the top end of the box body. The baffle is fixedly connected with the box body through a bolt piece, a handle piece is fixedly installed at the top end of the baffle, an I-shaped piece is fixedly installed at the bottom end of the baffle, an inner notch and an outer notch are formed in the two ends of the I-shaped piece respectively, a screen frame is arranged on the inner side of the I-shaped piece, and two fixing rods are fixedly installed in the box body; the utility model has the advantages that the guide block is inserted into the inner notch of the I-shaped piece, so that the double-layer filter screen can be easily replaced, the maintenance process is greatly simplified, and the operation difficulty and time cost of a user are reduced.

Description

Technical Field

[0001] This utility model relates to the field of composite filter technology, specifically a double-layer composite filter for HEPA filters. Background Technology

[0002] HEPA filters are an advanced technology widely used in air purification. Their core function is to effectively remove fine particulate matter from the air through special filter materials, thereby improving indoor air quality. The standard for HEPA filters is officially defined by the U.S. Department of Energy, achieving a filtration efficiency of over 99.97% for particles with a diameter of 0.3 micrometers. They are an effective filtration medium for pollutants such as dust, pollen, mold, and bacteria. Dual-layer filters integrate multiple filter structures, including HEPA, activated carbon, and antibacterial filters, into a single filter, significantly improving purification efficiency. Dual-layer composite filters offer advantages such as dense structure, high pollutant adhesion rate, high purification efficiency, and small footprint.

[0003] The applicant found through a search that a Chinese patent discloses "a filter screen for a filter", with publication (announcement) number "CN216368795U". This patent mainly installs the first and second filter mechanisms by opening an installation groove on the upper surface of the frame, and sets a limiting post at the bottom of the inner wall of the installation groove to limit their movement. However, this device cannot increase the air flow rate, resulting in poor filtration effect. Therefore, we propose a double-layer composite filter screen for HEPA filters. Utility Model Content

[0004] The purpose of this invention is to provide a double-layer composite filter for HEPA filters.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a double-layer composite filter for HEPA filters, comprising a housing, an input pipe fixedly installed at one end of the housing, and an output pipe fixedly installed at the other end, a suction mask fixedly installed at the other end of the input pipe, a baffle plate provided at the top of the housing, the baffle plate being fixedly connected to the housing by bolts, a handle fixedly installed at the top of the baffle plate, an I-shaped component fixedly installed at the bottom of the baffle plate, an inner groove and an outer groove respectively opened at both ends of the I-shaped component, a mesh frame provided on the inner side of the I-shaped component, two fixed rods fixedly installed inside the housing, an AC motor fixedly installed at one end of the two fixed rods, a fan blade fixedly installed at the output end of the AC motor, multiple guide plates fixedly installed on the side of the housing near the fixed rods, and multiple guide components provided on the side of the housing away from the I-shaped component.

[0006] As a further embodiment of this utility model: the number of bolts is two, and the two bolts are arranged in an array.

[0007] As a further embodiment of this utility model: a horizontal groove is provided on the surface of the box near the input pipe, and the I-shaped part is inserted into the horizontal groove.

[0008] As a further embodiment of this utility model: a double-layer filter screen is fixedly installed inside the mesh frame, and guide blocks are fixedly installed at both ends of the mesh frame, with the two guide blocks inserted into the inner groove of the I-shaped part.

[0009] As a further embodiment of this utility model: the plurality of the guide plates are arranged in a horizontal and a vertical manner.

[0010] As a further embodiment of this utility model: multiple guide components are arranged in an array, each guide component includes a square groove, the square groove is opened inside the box, a rotating rod is movably installed inside the square groove, and a pulley is fixedly installed on the outside of the rotating rod.

[0011] As a further embodiment of this utility model: multiple pulleys slide in the outer groove of the I-shaped part.

[0012] Compared with the prior art, the beneficial effects of this utility model by adopting the above technical solution are as follows:

[0013] 1. This utility model features guide blocks fixedly installed at both ends of the mesh frame. The two guide blocks are inserted into the inner groove of the I-shaped part, which makes it easy to replace the double-layer filter screen. This greatly simplifies the maintenance process, reduces the user's operating difficulty and time cost. The double-layer filter screen will gradually accumulate dust and impurities, resulting in a decrease in filtration efficiency. Regularly replacing the double-layer filter screen can maintain its good filtration performance and improve the user experience.

[0014] 2. This utility model features a fan blade fixedly installed at the output end of an AC motor and a guide plate. The fan blade generates suction to draw the air to be filtered into the housing and pushes the filtered air out, thereby achieving air circulation and purification, accelerating airflow, and allowing more air to pass through the filter screen, thus improving filtration efficiency. The fan blade also ensures a more uniform distribution of air in the double-layer filter screen, and the horizontal grooves guide the direction and path of airflow, ensuring smoother and more uniform airflow in the filter, reducing the generation of eddies and dead zones.

[0015] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0016] Figure 1 This is a front view schematic diagram of the structure in the embodiment of this utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the structure in an embodiment of this utility model;

[0018] Figure 3 This is a schematic diagram of the I-shaped part in an embodiment of this utility model;

[0019] Figure 4 This is a schematic diagram of the pulley and rotating rod in an embodiment of this utility model.

[0020] In the picture:

[0021] 11. Housing; 12. Input pipe; 13. Output pipe; 14. Mask suction device; 15. Baffle; 16. Bolts; 17. Handle; 18. Horizontal groove;

[0022] 21. I-shaped component; 22. Frame; 23. Double-layer filter screen; 24. Guide block; 25. Fixing rod; 26. AC motor; 27. Fan blade; 28. Deflector plate;

[0023] 31. Inner groove; 32. Outer groove; 33. Square groove; 34. Rotating rod; 35. Pulley. Detailed Implementation

[0024] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that the description of these embodiments is for the purpose of helping to understand this utility model, but does not constitute a limitation on this utility model.

[0025] Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] Please see the appendix Figure 1 -Appendix Figure 4This utility model discloses a double-layer composite filter for a HEPA filter, comprising a housing 11. An inlet pipe 12 is fixedly installed at one end of the housing 11, and an outlet pipe 13 is fixedly installed at the other end. A suction mask 14 is fixedly installed at the other end of the inlet pipe 12. A baffle 15 is provided at the top of the housing 11, and the baffle 15 is fixedly connected to the housing 11 by bolts 16. A handle 17 is fixedly installed at the top of the baffle 15, and an I-shaped component 21 is fixedly installed at the bottom of the baffle 15. The I-shaped component 21 has an inner groove 31 and an outer groove 32 at its two ends, respectively. The inner side of the filter is provided with a mesh frame 22. Two fixed rods 25 are fixedly installed inside the housing 11. An AC motor 26 is fixedly installed at one end of the two fixed rods 25. A fan blade 27 is fixedly installed at the output end of the AC motor 26. By setting the fan blade 27, the air flow is accelerated, allowing more air to pass through the filter, thereby improving the filtration efficiency. The fan blade 27 can also ensure that the air is more evenly distributed in the filter. Multiple guide plates 28 are fixedly installed on the side of the housing 11 near the fixed rods 25. Multiple guide components are provided on the side of the housing 11 away from the I-shaped part 21.

[0027] There are two bolts 16 arranged in an array. A transverse groove 18 is provided on the surface of the housing 11 near the input pipe 12. An I-shaped component 21 is inserted into the transverse groove 18. The transverse groove 18 guides the direction and path of airflow, ensuring smoother and more uniform airflow in the filter. A double-layer filter screen 23 is fixedly installed inside the mesh frame 22. Guide blocks 24 are fixedly installed at both ends of the mesh frame 22, and the two guide blocks 24 are inserted into the inner groove 31 of the I-shaped component 21. By setting the guide block 24, the replacement of the double-layer filter screen 23 can be easily carried out, which greatly simplifies the maintenance process and reduces the user's operating difficulty and time cost. Multiple guide plates 28 are arranged horizontally and vertically, and multiple guide components are arranged in an array. The guide components include a square groove 33, which is opened inside the box 11. A rotating rod 34 is movably installed inside the square groove 33, and a pulley 35 is fixedly installed on the outside of the rotating rod 34. Multiple pulleys 35 slide in the outer groove 32 of the I-shaped part 21.

[0028] Working principle:

[0029] First, insert the mesh frame 22 into the inner groove 31 of the I-shaped part 21 through the guide block 24. The mesh frame 22 is fixed under the action of friction. Then, use the handle 17 to insert the I-shaped part 21 into the box 11 through the transverse groove 18. The pulley 35 rolls in the outer groove 32 of the I-shaped part 21 to guide it. Use two bolts 16 to fix the baffle 15. Start the AC motor 26 to drive the fan blade 27 to draw in air from the suction mask 14. After being guided and evenly dispersed by the guide plate 28, the air is filtered by the double-layer filter screen 23 and discharged from the output pipe 13. When replacement is needed, remove the bolts 16, pull the baffle 15 outward, replace the mesh frame 22 and reinstall it. At this point, the entire process is completed.

[0030] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0032] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments.

[0033] For those skilled in the art, various changes, modifications, substitutions, and alterations to these embodiments without departing from the principles and spirit of this utility model will still fall within the protection scope of this utility model.

Claims

1. A double-layer composite filter for a HEPA filter, comprising a housing (11), characterized in that: An input pipe (12) is fixedly installed at one end of the housing (11), and an output pipe (13) is fixedly installed at the other end. A suction mask (14) is fixedly installed at the other end of the input pipe (12). A baffle (15) is provided at the top of the housing (11). The baffle (15) is fixedly connected to the housing (11) by bolts (16). A handle (17) is fixedly installed at the top of the baffle (15). An I-shaped piece (21) is fixedly installed at the bottom of the baffle (15). The two ends of the I-shaped piece (21) are respectively provided with inner grooves. The inner side of the I-shaped part (21) is provided with a mesh frame (22), and two fixed rods (25) are fixedly installed inside the box (11). An AC motor (26) is fixedly installed at one end of the two fixed rods (25), and a fan blade (27) is fixedly installed at the output end of the AC motor (26). Multiple guide plates (28) are fixedly installed on the side of the box (11) near the fixed rods (25), and multiple guide components are provided on the side of the box (11) away from the I-shaped part (21).

2. The double-layer composite filter screen for HEPA filters according to claim 1, characterized in that: The number of bolts (16) is two, and the two bolts (16) are arranged in an array.

3. The double-layer composite filter screen for HEPA filters according to claim 1, characterized in that: A transverse groove (18) is provided on the surface of the box (11) near the input pipe (12), and the I-shaped part (21) is inserted into the transverse groove (18).

4. The double-layer composite filter screen for HEPA filters according to claim 1, characterized in that: A double-layer filter screen (23) is fixedly installed inside the mesh frame (22), and guide blocks (24) are fixedly installed at both ends of the mesh frame (22). The two guide blocks (24) are inserted into the inner groove (31) of the I-shaped part (21).

5. The double-layer composite filter screen for HEPA filters according to claim 1, characterized in that: The multiple guide vanes (28) are arranged in a horizontal and a vertical manner.

6. The double-layer composite filter screen for HEPA filters according to claim 1, characterized in that: Multiple guide components are arranged in an array. Each guide component includes a square groove (33) which is opened inside the housing (11). A rotating rod (34) is movably installed inside the square groove (33), and a pulley (35) is fixedly installed on the outside of the rotating rod (34).

7. A double-layer composite filter for a HEPA filter according to claim 6, characterized in that: The multiple pulleys (35) slide in the outer groove (32) of the I-shaped part (21).

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