Air filter element with self-cleaning function

Abstract

The air filter element with the self-cleaning function comprises an outer mounting frame, a first filter screen assembly and a second filter screen assembly, a first drawing groove and a second drawing groove are formed in the outer mounting frame, the first filter screen assembly is fixed in the first drawing groove, the second filter screen assembly is fixed in the second drawing groove, and the first filter screen assembly and the second filter screen assembly are arranged in the outer mounting frame. A super-hydrophobic and amphiphobic functional layer is arranged on the surface of a first filter screen in the first filter screen assembly; and the aperture of the first filter screen in the first filter screen assembly is smaller than that of the second filter screen in the second filter screen assembly. According to the air filter element with the self-cleaning function, the filtering effect can be guaranteed, the service life is prolonged, and the replacement period is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of air purification and filtration, and in particular relates to an air filter element with self-cleaning function. Background Technology

[0002] An air filter element is a type of filter, also called an air filter cartridge, air cleaner, etc. It is mainly used for air filtration in engineering vehicles, automobiles, agricultural vehicles, laboratories, sterile operating rooms, and various precision operating rooms. During engine operation, a large amount of air is drawn in. If the air is not filtered, suspended dust in the air will be sucked into the cylinder, accelerating the wear of the piston assembly and cylinder. Larger particles entering between the piston and cylinder can cause severe "cylinder scoring," which is particularly serious in dry and sandy working environments. The air filter is installed in front of the carburetor or intake manifold to filter out dust and sand particles from the air, ensuring that sufficient clean air enters the cylinder.

[0003] Traditional air filters, designed to increase filtration area and airflow, are mostly folded. However, the folded corners can trap and trap dust particles, causing blockages. This results in frequent replacements, high replacement costs, and the need to remove the filter for dust removal during replacement cycles. This process is cumbersome, and using an air gun can damage the filter. Furthermore, the dust and impurities accumulated on the filter surface over time are quite stubborn. A common solution is to add a first filter layer outside the filter. However, if the mesh is too fine, it will affect airflow; if it's too coarse, larger dust particles will pass through, failing to effectively filter coarse particles. Utility Model Content

[0004] In view of this, the present invention aims to propose an air filter element with a self-cleaning function to solve the problems of existing air filter elements where folded corners trap and trap particulate dust, causing clogging, short replacement cycles, high replacement costs, and the need to remove the air filter element for dust removal during the replacement cycle to ensure filtration effectiveness. This operation is cumbersome, and using an air gun to blow away dust can damage the filter element. Furthermore, the impurities and dust accumulated on the filter element surface over time are quite stubborn. A common solution is to add a first filter layer to the outside of the filter element. However, if the mesh is too fine, it will affect the airflow; if the mesh is too coarse, larger dust and particulate matter will pass through, failing to achieve the desired filtration effect for coarse particles.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] This utility model provides an air filter element with self-cleaning function, including an outer mounting frame, a first filter assembly, and a second filter assembly. The outer mounting frame is provided with a first pull-out groove and a second pull-out groove. The first filter assembly is fixed in the first pull-out groove, and the second filter assembly is fixed in the second pull-out groove. The surface of the first filter in the first filter assembly has an ultra-hydrophobic and dual-hydrophobic functional layer. The pore size of the first filter in the first filter assembly is smaller than the pore size of the second filter in the second filter assembly.

[0007] Furthermore, the outer mounting frame includes a first outer mounting frame and a second outer mounting frame. The first outer mounting frame is a C-shaped angle steel, and the second outer mounting frame is also a C-shaped angle steel with rectangular sheet metal closures on both the left and right ends, and the bent openings face outwards. The length of the first outer mounting frame is greater than the length of the second outer mounting frame, and the first outer mounting frame and the second outer mounting frame are locked together by bolts.

[0008] Furthermore, the first pull-out groove includes a first mounting angle steel and a second fixing angle steel groove, and the second pull-out groove includes a second fixing angle steel groove; the first mounting angle steel is an L-shaped angle steel, and the first mounting angle steel is welded to the inner side of the first outer mounting frame; the second fixing angle steel groove includes an upper angle steel and a lower angle steel, the upper angle steel and the lower angle steel are welded together, and both the upper angle steel and the lower angle steel are L-shaped angle steels; the horizontal mounting section of the first mounting angle steel and the upper angle steel of the second fixing angle steel groove form the first pull-out groove, and the middle part of the welded upper angle steel and the lower angle steel forms the second pull-out groove.

[0009] Furthermore, the first filter assembly includes a first filter, a first fixing frame disposed around the first filter, a first fixing rod for fixing the first filter into an S-shape, and a second fixing rod; the first fixing frame is used to fix the first filter; the first filter is folded into an S-shape in the middle and the front and rear end face extensions are horizontal; the first fixing rod and the second fixing rod are evenly fixed inside the first fixing frame and connect the left and right frames of the first fixing frame; the first fixing rod fixes the lowest point of the S-shape, and the second fixing rod fixes the highest point of the S-shape; the front and rear end face extensions of the first filter are horizontally embedded in parallel grooves along the length direction inside the first fixing frame; a first slide rail is provided at the side contact point between the first fixing frame and the first pull-out groove; the first slide rail is arranged along the length direction of the first fixing frame; the first fixing frame is bolted as a whole.

[0010] Furthermore, the second filter assembly includes a second fixed frame and a second filter. The second filter is fixed inside the second fixed frame. A second slide rail is provided at the side contact point between the second fixed frame and the second pull-out groove. The second slide rail is arranged along the length direction of the second fixed frame. The second fixed frame is bolted as a whole.

[0011] Furthermore, the first and second fixing rods are made of stainless steel wire.

[0012] Furthermore, the first fixing rod, the second fixing rod, and the first filter screen are fixed together by equidistant adhesive dots.

[0013] Furthermore, the curvature of the first filter screen is controlled between 180° and 270°.

[0014] Compared with existing technologies, the self-cleaning air filter element of this invention has the following advantages: The self-cleaning air filter element of this invention folds the first filter screen into an S-shape using a folding machine, reducing clogging at the folded corners. Furthermore, under certain air permeability and pore size, it is treated with a nano-superhydrophobic foaming liquid, which impregnates the inside of the first filter screen to form a porous hard film with superhydrophobic, oleophobic, and shaping properties. When the fan is started, dust automatically rolls off the surface of the first filter screen after contact with the filter element, thus automatically cleaning the air filter element during use, ensuring its service life and extending the replacement cycle. Attached Figure Description

[0015] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0016] In the attached diagram:

[0017] Figure 1 This is an overall isometric schematic diagram of the air filter element with self-cleaning function described in an embodiment of the present invention;

[0018] Figure 2 This is a front view schematic diagram of the air filter element with self-cleaning function described in an embodiment of the present utility model;

[0019] Figure 3 This is a cross-sectional view at point AA in the main view of the air filter core with self-cleaning function described in this embodiment of the utility model;

[0020] Figure 4 This is an enlarged view of section A in the AA cross-sectional view of the air filter element with self-cleaning function described in this embodiment of the utility model.

[0021] Figure 5 This is an enlarged schematic diagram of section B in the AA cross-sectional view of the air filter element with self-cleaning function described in this embodiment of the utility model;

[0022] Figure 6This is an enlarged view of section C in the AA cross-sectional view of the air filter element with self-cleaning function described in this embodiment of the utility model;

[0023] Figure 7 This is a bottom view of the air filter element with self-cleaning function described in an embodiment of the present invention;

[0024] Figure 8 This is a bottom view of the air filter element with self-cleaning function described in an embodiment of the present invention, with a cross-sectional view at point BB.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. First external mounting frame; 2. Second external mounting frame; 3. First filter screen; 4. First fixing frame; 5. First mounting angle steel; 6. Second filter screen; 7. First fixing rod; 8. Second fixing angle steel channel; 9. Second fixing frame; 10. Second fixing rod; 11. First slide rail; 12. Second slide rail. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] See Figures 1-8 As shown, this embodiment provides an air filter element with self-cleaning function, including an outer mounting frame, a first filter assembly, and a second filter assembly. The outer mounting frame has a first pull-out groove and a second pull-out groove. The first filter assembly is fixed in the first pull-out groove, and the second filter assembly is fixed in the second pull-out groove. The surface of the first filter 3 in the first filter assembly has an ultra-hydrophobic and dual-hydrophobic functional layer. The pore size of the first filter 3 in the first filter assembly is smaller than the pore size of the second filter 6 in the second filter assembly.

[0032] Specifically, in this embodiment, the outer mounting frame includes a first outer mounting frame 1 and a second outer mounting frame 2. The first outer mounting frame 1 is a C-shaped angle steel, and the second outer mounting frame 2 is also a C-shaped angle steel with rectangular sheet metal closures on both the left and right ends, and the bent openings face outwards. The length of the first outer mounting frame 1 is greater than the length of the second outer mounting frame 2, and the first outer mounting frame 1 and the second outer mounting frame 2 are locked together by bolts.

[0033] Specifically, in this embodiment, the first pull-out groove includes a first mounting angle steel 5 and a second fixing angle steel groove 8, and the second pull-out groove includes a second fixing angle steel groove 8; the first mounting angle steel 5 is an L-shaped angle steel, and the first mounting angle steel 5 is welded to the inner side of the first outer mounting frame 1; the second fixing angle steel groove 8 includes an upper angle steel and a lower angle steel, which are welded together, and both the upper and lower angle steels are L-shaped angle steels; the horizontal mounting section of the first mounting angle steel 5 and the upper angle steel of the second fixing angle steel groove 8 form the first pull-out groove, and the middle part of the welded upper and lower angle steels forms the second pull-out groove.

[0034] Specifically, in this embodiment, the first filter assembly includes a first filter 3, a first fixing frame 4 disposed around the first filter 3, a first fixing rod 7 for fixing the first filter 3 into an S-shape, and a second fixing rod. The first fixing frame 4 is used to fix the first filter 3. The first filter 3 is folded into an S-shape in the middle, and the extension sections of the front and rear end faces are horizontal. The first fixing rod 7 and the second fixing rod 10 are evenly fixed inside the first fixing frame 4 and connect the left and right frames of the first fixing frame 4. The first fixing rod 7 fixes the lowest point of the S-shape, and the second fixing rod fixes the highest point of the S-shape. The extension sections of the front and rear end faces of the first filter 3 are horizontally embedded in parallel grooves along the length direction inside the first fixing frame 4. A first slide rail 11 is provided at the side contact point between the first fixing frame 4 and the first pull-out groove. The first slide rail 11 is arranged along the length direction of the first fixing frame 4. The first fixing frame 4 is bolted in place. The first slide rail 11 is fixed to the side of the first pull-out groove and the side of the first fixing frame 4, respectively.

[0035] The extended sections of the front and rear ends of the first filter screen 3 are horizontally embedded into the parallel grooves along the length of the inner side of the first fixing frame 4, achieving initial positioning. The first fixing rod 7 and the second fixing rod 10 are fixed at the lowest and highest points of the S-shaped filter screen, respectively, further fixing the first filter screen 3 into an S-shape and tightly connecting it with the first fixing frame 4 to form a whole. The first fixing frame 4 contacts the side of the first pull-out groove through the first slide rail, allowing the entire first filter screen assembly to be easily pulled out within the first pull-out groove. When the first filter screen assembly needs to be installed, it is aligned with the first pull-out groove and gently pushed in. The first ball bearing rolls within the first slide rail, guiding the first filter screen assembly smoothly into the first pull-out groove; for disassembly, the reverse operation is performed to easily remove it.

[0036] Specifically, in this embodiment, the second filter assembly includes a second fixing frame 9 and a second filter 6. The second filter 6 is fixed inside the second fixing frame 9. A second slide rail 12 is provided at the contact point between the second fixing frame 9 and the side of the second pull-out slot. The second slide rail 12 is arranged along the length of the second fixing frame 9, and the second fixing frame 9 is bolted in place. The disassembly and installation methods of the second filter assembly in the second pull-out slot are the same as those of the first filter assembly. Both the second slide rail 12 and the first slide rail are drawer slide rails. The first slide rail 12 is fixed to the side of the second pull-out slot and the side of the second fixing frame 9, respectively.

[0037] Specifically, in this embodiment, the first fixing rod 7 and the second fixing rod 10 are stainless steel wires.

[0038] Specifically, in this embodiment, the first fixing rod 7, the second fixing rod 10, and the first filter screen 3 are fixed by equidistant adhesive application.

[0039] Specifically, in this embodiment, the curvature of the first filter screen 3 is controlled between 180° and 270°.

[0040] The superhydrophobic and dual-hydrophobic functional layer is formed by impregnating a superhydrophobic and dual-hydrophobic finishing agent. This finishing agent contains a microsphere foaming agent and a film-forming agent. The microsphere foaming agent particle size is controlled between 28µm and 38µm, and the film-forming agent is added at a rate of 0.1%. In actual operation, a perfluorocyclopropane hydrophobic and oleophobic agent purchased from Guangzhou Liyuan Industrial Materials Co., Ltd., and a microsphere foaming agent purchased from Nanjing Saipu High-Performance Materials Co., Ltd., are used to impregnate the first filter screen. Simultaneously with the coating process, the microporous foaming agent imparts micropores to the oleophobic film, ensuring that the air permeability through the first filter screen is not affected.

[0041] In this embodiment, the self-cleaning filter and the ordinary filter were weighed as a whole. While ensuring a suction power of 0.65-1Kpa, the filter was continuously vacuumed for 15 seconds, and then vacuumed in the reverse direction for 15 seconds. After the vacuuming was completed, the weight of the recovered dust was weighed and the recovery rate was calculated, resulting in Table 1 below.

[0042] Table 1

[0043]

[0044] The self-cleaning air filter cartridge folds the first filter screen into an S-shape using a folding machine, reducing clogging at the folded corners. With a certain air permeability and pore size, it is treated with a nano-superhydrophobic foaming liquid. This liquid impregnates the inside of the first filter screen, forming a porous hard film with superhydrophobic, oleophobic, and shaping properties. When the fan is started, dust automatically rolls off the surface of the first filter screen after contact with the filter cartridge, automatically cleaning the air filter cartridge during use. This ensures the lifespan of the air filter cartridge and extends the replacement cycle. Replacement is simple: just pull out the entire first filter screen assembly.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An air filter element with self-cleaning function, characterized in that, The device includes an outer mounting frame, a first filter assembly, and a second filter assembly. The outer mounting frame has a first pull-out groove and a second pull-out groove. The first filter assembly is fixed in the first pull-out groove, and the second filter assembly is fixed in the second pull-out groove. The surface of the first filter in the first filter assembly has an ultra-hydrophobic and dual-hydrophobic functional layer. The pore size of the first filter in the first filter assembly is smaller than the pore size of the second filter in the second filter assembly.

2. The air filter element with self-cleaning function according to claim 1, characterized in that, The external mounting frame includes a first external mounting frame and a second external mounting frame. The first external mounting frame is a C-shaped angle steel, and the second external mounting frame is also a C-shaped angle steel. Both ends of the frame are sealed with rectangular sheet metal, and the bent openings face outwards. The length of the first external mounting frame is greater than the length of the second external mounting frame. The first external mounting frame and the second external mounting frame are locked together with bolts.

3. The air filter element with self-cleaning function according to claim 1, characterized in that, The first pull-out groove includes a first mounting angle steel and a second fixing angle steel groove, and the second pull-out groove includes a second fixing angle steel groove; the first mounting angle steel is an L-shaped angle steel, and the first mounting angle steel is welded to the inner side of the first outer mounting frame; the second fixing angle steel groove includes an upper angle steel and a lower angle steel, the upper angle steel and the lower angle steel are welded together, and both the upper angle steel and the lower angle steel are L-shaped angle steels; the horizontal mounting section of the first mounting angle steel and the upper angle steel of the second fixing angle steel groove form the first pull-out groove, and the middle part of the welded upper angle steel and the lower angle steel forms the second pull-out groove.

4. The air filter element with self-cleaning function according to claim 1, characterized in that, The first filter assembly includes a first filter, a first fixing frame disposed around the first filter, a first fixing rod for fixing the first filter into an S-shape, and a second fixing rod. The first fixing frame is used to fix the first filter. The first filter is folded into an S-shape in the middle, and the extension sections of the front and rear end faces are horizontal. The first fixing rod and the second fixing rod are evenly fixed inside the first fixing frame and connect the left and right frames of the first fixing frame. The first fixing rod fixes the lowest point of the S-shape, and the second fixing rod fixes the highest point of the S-shape. The extension sections of the front and rear end faces of the first filter are horizontally embedded in parallel grooves along the length direction inside the first fixing frame. A first slide rail is provided at the side contact point between the first fixing frame and the first pull-out groove. The first slide rail is arranged along the length direction of the first fixing frame. The first fixing frame is bolted as a whole.

5. The air filter element with self-cleaning function according to claim 1, characterized in that, The second filter assembly includes a second fixed frame and a second filter. The second filter is fixed inside the second fixed frame. A second slide rail is provided at the side contact point between the second fixed frame and the second pull-out groove. The second slide rail is arranged along the length direction of the second fixed frame. The second fixed frame is bolted as a whole.

6. The air filter element with self-cleaning function according to claim 4, characterized in that, The first and second fixing rods are made of stainless steel wire.

7. The air filter element with self-cleaning function according to claim 6, characterized in that, The first fixing rod, the second fixing rod, and the first filter screen are fixed together by equidistant adhesive application.

8. The air filter element with self-cleaning function according to claim 4, characterized in that, The curvature of the first filter screen is controlled between 180° and 270°.

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