Cylindrical compressible air purification filter element

Abstract

The utility model discloses a cylindrical compressible air purification filter element which comprises a filter material layer, an activated carbon filter layer is arranged on the outer side of the filter material layer, and a pre-filter layer is arranged on the activated carbon filter layer; an upper cover and a lower cover are respectively mounted at two ends of the assembled filter material layer, activated carbon filter layer and pre-filter layer; and the upper cover and the lower cover adopt elastic flexible structures. According to the utility model, the upper cover and the lower cover have good deformable and resettable characteristics, and are matched with the filter material layer, the activated carbon filter layer and the pre-filter layer to realize the deformable and resettable properties of the whole cylindrical filter element; after the filter element is combined, the storage space occupied by the filter element can be reduced through proper extrusion, and the purpose of increasing the packaging and transportation quantity is achieved, so that the packaging and transportation cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air filter elements, in particular to a cylindrical pressable air purification filter element. Background Art

[0002] The purpose of air filters is to obtain clean air that meets the standards. Generally, ventilation filters are used to capture and adsorb dust particles of different sizes in the air to improve the air quality and purify the air. Air filter elements are usually the most indispensable part of air purification devices. In today's household air filter field, they are generally divided into cylindrical products and flat products.

[0003] As attached Figure 3 As shown, the cylindrical air filter element contains an annular sealing cotton 6, an annular upper cover 1, a lower cover 5, a pre-filter layer 4, an activated carbon filter layer 3, and a filter material layer 2; the upper and lower covers serve as the frame of the cylindrical air filter element, and play a role in fixing the overall shape of the product. At the same time, the upper and lower covers also fit with the sealing cotton to play a sealing role. The materials generally used for this type of upper and lower covers are usually plastics, such as ABS, PP, etc. However, during the production process of this type of upper and lower covers, injection molds are required for injection molding production. Due to the related expenses of injection molds and injection molding equipment and the complex process, the production cost of the upper and lower covers is high. At the same time, due to the use of plastic materials, the shape of the final filter element is fixed, and it occupies a large space and is not easy to store, resulting in increased packaging and transportation costs of the final filter element.

[0004] In addition, since the plastic cover is a hard material, there is a gap between the filter element and the air purifier, so it is necessary to paste sealing cotton on the cover. The elastic characteristics of the sealing cotton itself are used to increase the airtightness between the filter element and the air purifier, so that more air can pass through the filter element, thereby achieving the purpose of improving the filtration efficiency; but the pasting of the sealing cotton also increases the production cost of the product. For this reason, we propose a cylindrical pressable air purification filter element. Utility Model Content

[0005] The utility model aims to provide a cylindrical pressable air purification filter element to solve the problems in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cylindrical pressable air purification filter element, comprising a filter material layer, an activated carbon filter layer is arranged on the outside of the filter material layer, and the activated carbon filter layer is provided with a pre-filter layer; an upper cover and a lower cover are respectively installed at both ends of the filter material layer, the activated carbon filter layer and the pre-filter layer after assembly; the upper cover and the lower cover adopt an elastic and flexible structure.

[0007] Preferably, the upper cover and the lower cover are made of EPDM rubber, polyurethane or soft non-woven fabric.

[0008] Preferably, the filter material layer is a pleated structure formed by folding non-woven filter paper, and the two ends of the folded non-woven filter paper are bonded into a circular ring structure by a hot-melt adhesive layer.

[0009] Preferably, the folded surface of the pleated structure of the filter material layer after being folded is coated with a rubber strip.

[0010] Preferably, the adhesive strip is made of non-foaming hot melt adhesive or foaming hot melt adhesive.

[0011] Preferably, the coating of the folded surface rubber strip of the filter material layer is carried out by pleated top full mountain coating or pleated top half mountain coating.

[0012] Preferably, the activated carbon filter layer adopts activated carbon bag, activated carbon cotton or activated carbon net.

[0013] Preferably, the pre-filtration layer is made of PET mesh, PP mesh or non-woven mesh.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. After the upper cover and the lower cover are made of EPDM rubber, polyurethane or soft non-woven fabric, since EPDM rubber, polyurethane or soft non-woven fabric has good deformability and resettability, and is combined with the filter material layer, activated carbon filter layer and pre-filter layer, the deformability and resettability of the entire cylindrical filter element can be achieved; after being combined into a filter element, through appropriate extrusion, the storage space occupied by itself can be reduced, so as to achieve the purpose of increasing the packaging and transportation quantity, thereby reducing the packaging and transportation costs.

[0016] 2. The EPDM rubber, polyurethane or soft non-woven fabric used for the upper and lower covers is quite soft and can be used instead of sealing cotton. Therefore, the upper and lower covers can be used as seals, thereby reducing the materials that constitute the product and effectively reducing the cost of the filter element. After the upper and lower covers are made of EPDM rubber, polyurethane or soft non-woven fabric, they can be cut and formed using a die cutter, without the need for injection molding and with a simple process, which can effectively reduce the cost of production materials.

[0017] 3. The upper cover and the lower cover are made of EPDM rubber or polyurethane or soft non-woven fabric. Taking EPDM rubber as an example, EPDM rubber is a terpolymer of ethylene, propylene and non-conjugated dienes; the main characteristics of this type of material are excellent oxidation resistance, ozone resistance, corrosion resistance and good deformability and resettability.

[0018] 4. The gluing method of the filter material layer can be to use non-foaming or foaming hot melt adhesive to coat the top of the pleated mountain or half of the mountain according to the needs, which can improve the strength of the filter material layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the filter material layer of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the filter material layer, activated carbon filter layer and pre-filter layer of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the utility model of pleated top and full mountain coating;

[0024] Figure 5 It is a schematic diagram of the structure of the pleated top and mid-mountain coating of the utility model;

[0025] Figure 6 It is a structural schematic diagram of the prior art.

[0026] In the figure: 1. upper cover; 2. filter material layer; 3. activated carbon filter layer; 4. pre-filter layer; 5. lower cover; 6. sealing cotton; 7. rubber strip; 8. hot melt adhesive layer. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0028] See also Figure 1-6In an embodiment of the utility model, a cylindrical pressable air purification filter element includes a filter material layer 2, an activated carbon filter layer 3 is arranged on the outside of the filter material layer 2, and the activated carbon filter layer 3 is provided with a pre-filter layer 4; the filter material layer 2, the activated carbon filter layer 3 and the pre-filter layer 4 are assembled with an upper cover 1 and a lower cover 5 at both ends thereof respectively; the upper cover 1 and the lower cover 5 adopt an elastic and flexible structure, and the upper cover 1 and the lower cover 5 are made of EPDM rubber, polyurethane or soft non-woven fabric.

[0029] After the upper cover and the lower cover are made of EPDM rubber or polyurethane or soft non-woven fabric, since EPDM rubber or polyurethane or soft non-woven fabric has good deformability and resettability, and cooperates with the filter material layer, the activated carbon filter layer and the pre-filter layer, the deformability and resettability of the entire cylindrical filter element are achieved; after being combined into the filter element, through appropriate extrusion, the storage space occupied by itself can be reduced, and the purpose of increasing the packaging and transportation quantity is achieved, thereby reducing the packaging and transportation costs.

[0030] The EPDM rubber, polyurethane or soft non-woven fabric used for the upper and lower covers is quite soft and can be used instead of sealing cotton, so the upper and lower covers can also be used as seals, thereby reducing the materials constituting the product and effectively reducing the cost of the filter element; after the upper and lower covers are made of EPDM rubber, polyurethane or soft non-woven fabric, they can be cut and formed using a die cutter, without the need for injection molding and with a simple process, which can effectively reduce the cost of production materials.

[0031] The upper cover and the lower cover are made of EPDM rubber or polyurethane or soft non-woven fabric. Taking EPDM rubber as an example, EPDM rubber is a terpolymer of ethylene, propylene and non-conjugated diene. The main characteristics of this kind of material are excellent oxidation resistance, ozone resistance, corrosion resistance and good deformability and resettability.

[0032] The filter material layer 2 is a pleated structure formed by folding a non-woven filter paper. The two ends of the folded non-woven filter paper are bonded into a circular structure by a hot melt adhesive layer 8. The folded surface of the pleated structure of the filter material layer 2 is coated with an adhesive strip 7. The adhesive strip 7 is made of non-foaming hot melt adhesive or foaming hot melt adhesive. The coating of the adhesive strip 7 on the folded surface of the filter material layer 2 is pleated full-mount coating or pleated half-mountain coating.

[0033] The filter material layer 2 is a non-woven fabric with functions including but not limited to antibacterial, anti-allergic, fragrance, vitamin release, etc. The filter paper is cut to a certain width and then folded to form a pleated structure. After folding, the folded surface needs to be coated with adhesive strips 7. When coating, non-foaming or foaming hot melt adhesive can be used as needed to perform pleated top-mountain coating or half-mountain coating. After the operation is completed, several folded surfaces with equal width, height, and spacing are formed. Then, hot melt adhesive layers 8 are used to bond the two ends into a ring-shaped structure with a specified radius to form a cylindrical filter material layer. After bonding, several folded surfaces of the filter material layer are in the vertical direction.

[0034] The activated carbon filter layer 3 is made of activated carbon bag, activated carbon cotton or activated carbon net. The activated carbon filter layer is formed by activated carbon or activated carbon related products, including but not limited to activated carbon bag, activated carbon cotton, activated carbon net, etc. The activated carbon filter layer needs to be enclosed by hot pressing, ultrasonic, sewing and other methods. After enclosing, the activated carbon filter layer needs to be surrounded by the outer periphery of the filter material layer.

[0035] The pre-filter layer 4 is made of PET mesh, PP mesh or non-woven mesh. The pre-filter layer is a mesh product composed of PET, PP or non-woven mesh with fine pores. The pre-filter layer is bonded and enclosed by heat pressing, ultrasonic wave or other methods. The pre-filter layer after enclosing needs to surround the outer periphery of the activated carbon part.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A cylindrical pressable air purification filter element, comprising a filter material layer (2), characterized in that: An activated carbon filter layer (3) is arranged outside the filter material layer (2), and the activated carbon filter layer (3) is provided with a pre-filter layer (4); an upper cover (1) and a lower cover (5) are respectively installed at both ends of the filter material layer (2), the activated carbon filter layer (3) and the pre-filter layer (4) after assembly; the upper cover (1) and the lower cover (5) adopt an elastic and flexible structure.

2. A cylindrical pressable air purification filter element according to claim 1, characterized in that: The upper cover (1) and the lower cover (5) are made of EPDM rubber, polyurethane or soft non-woven fabric.

3. The cylindrical pressable air purification filter element according to claim 1, characterized in that: The filter material layer (2) is a pleated structure formed by folding non-woven filter paper, and the two ends of the folded non-woven filter paper are bonded to form a circular ring structure via a hot melt adhesive layer (8).

4. A cylindrical pressable air purification filter element according to claim 3, characterized in that: The folded surface of the pleated structure of the filter material layer (2) after being folded is coated with a rubber strip (7).

5. A cylindrical pressable air purification filter element according to claim 4, characterized in that: The adhesive strip (7) is made of non-foaming hot melt adhesive or foaming hot melt adhesive.

6. A cylindrical pressable air purification filter element according to claim 4 or 5, characterized in that: The coating of the folded surface rubber strip (7) of the filter material layer (2) is carried out by pleated top full mountain coating or pleated top half mountain coating.

7. The cylindrical pressable air purification filter element according to claim 1, characterized in that: The activated carbon filter layer (3) is made of activated carbon bag, activated carbon cotton or activated carbon net.

8. The cylindrical pressable air purification filter element according to claim 1, characterized in that: The pre-filter layer (4) is made of a PET mesh, a PP mesh or a non-woven mesh.

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