Cylindrical filter element for filter

Abstract

The utility model discloses a cylindrical filter element for a filter, which comprises a rectangular filter sheet, both sides of the rectangular filter sheet are provided with side covered edges, both ends of the rectangular filter sheet are provided with end covered edges, the body of the rectangular filter sheet is bent, and the end parts of both ends are fixedly connected through the two end covered edges in an internal and external overlapping manner. According to the rectangular filter, the side wrapping edges and the end wrapping edges are arranged on the edges, after rounding, hot pressing and fixing can be carried out through overlapping of the two end wrapping edges, a cylindrical structure is formed, corresponding glue dripping and coating equipment does not need to be arranged, and the practicability of the device is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of filter cartridges, and particularly relates to a cylindrical filter cartridge for a filter. Background Art

[0002] In the filter of a vacuum cleaner, its filter cartridge is generally cup-shaped or cylindrical. Due to the excessive wind pressure ejected from the pipeline, although the general cup-shaped filter cartridge has a high flow rate, because it is directly blown, it will not only bear lateral pressure but also axial pressure, and the pressure on the connection will be very large. While the cylindrical filter cartridge has a small flow rate, since it only bears the lateral pressure perpendicular to the inner wall, the connection basically does not bear much pressure. Therefore, the filter cartridges of vacuum cleaners on the market basically have both types.

[0003] When the existing cylindrical filter cartridge is made into a complete circle, most of them use glue to coat the area to be bonded to form a glue layer for fixing and bonding. Therefore, when fixing after forming a complete circle, it is necessary to set up glue dripping and coating processes and their corresponding equipment. The production working hours are long and the production cost is also high. Moreover, the materials of the various filter layers of the filter cartridge are different, and they are only simply stacked together before crimping. During composite crimping, it is easy to produce slippage due to the different reaction forces of each layer, resulting in composite processing defects and reducing the yield rate, and there is room for further improvement. Summary of the Utility Model

[0004] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and provide a cylindrical filter cartridge for a filter, which solves the above problems.

[0005] To achieve the above purpose, a cylindrical filter cartridge for a filter is provided, which includes a rectangular filter sheet. Side edge wrappings are arranged on both sides of the rectangular filter sheet, and end edge wrappings are arranged at both ends of the rectangular filter sheet. The body of the rectangular filter sheet is bent, and the two ends are fixedly connected by the inner and outer overlapping of the two end edge wrappings;

[0006] The rectangular filter sheet includes a filter cloth base layer, two non-woven fabric coating layers and two outer net layers. Non-woven fabric coating layers are fixedly connected to both sides of the filter cloth base layer. Outer net layers are arranged on the sides of the two non-woven fabric coating layers away from the filter cloth base layer, and adhesive spray layers are arranged on the outer surfaces of the two non-woven fabric coating layers.

[0007] According to the above-mentioned cylindrical filter cartridge for a filter, the material of the filter cloth base layer is an existing non-woven filter cloth on the market.

[0008] According to the above-mentioned cylindrical filter cartridge for a filter, the non-woven fabric coating layer is a polypropylene spunbond non-woven fabric with an existing specification of 20 g / ㎡ on the market.

[0009] According to the cylindrical filter element for a filter, the material of the outer net layer is an existing mesh cloth product on the market.

[0010] According to the cylindrical filter element for a filter, both surfaces of the two sides of the filter cloth base layer and the surfaces of the two non-woven fabric coating layers are fixedly connected by ultrasonic pressing.

[0011] According to the cylindrical filter element for a filter, the edges of the filter cloth base layer, the two non-woven fabric coating layers and the two outer net layers are fixedly connected by glue at the positions of side edge wrapping and end edge wrapping.

[0012] The above solution has at least one of the following beneficial effects:

[0013] 1. The rectangular filter sheet of the present utility model is provided with side edge wrapping and end edge wrapping at the edges. After forming a complete circle, the two end edge wrappings can be overlapped and thermally pressed and fixed to form a cylindrical structure, without the need to set corresponding glue coating equipment, which enhances the practicability of the device.

[0014] 2. By compounding the two sides of the filter cloth base layer with the non-woven fabric coating layer, the filter layer structure of the filter element is formed. In cooperation with the adhesive spray layer arranged on the outer side of the non-woven fabric coating layer, not only can the glue liquid infiltrated through the adhesive spray layer be used for preliminary fixation during the ultrasonic compound pressing of the two sides of the non-woven fabric coating layer and the filter cloth base layer to improve the stability of the pressing, but also a large number of tiny adhesive liquid droplets can adhere to the fibers of the non-woven fabric coating layer at the microstructural level. Even when the thickness of the non-woven fabric coating layer is small, it can still have a strong dust adsorption ability, which enhances the practicability of the device.

[0015] The additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following further illustrates the present utility model in conjunction with the drawings and embodiments;

[0017] Figure 1 It is a three-dimensional structural schematic diagram of a cylindrical filter element for a filter of the present utility model;

[0018] Figure 2 It is an unfolded three-dimensional structural schematic diagram of a cylindrical filter element for a filter of the present utility model;

[0019] Figure 3 It is a layered structural schematic diagram of a rectangular filter sheet of a cylindrical filter element for a filter of the present utility model.

[0020] LEGEND DESCRIPTION:

[0021] 1. Rectangular filter sheet; 2. Side edge wrapping; 3. End edge wrapping; 101. Filter cloth base layer; 102. Non-woven fabric film layer; 103. Outer mesh layer; 104. Adhesive spray layer. Detailed implementation manners

[0022] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The function of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it should not be construed as a limitation on the protection scope of the present utility model.

[0023] Referring to Figures 1 - 3 , an embodiment of the present utility model provides a cylindrical filter element for a filter, which includes a rectangular filter sheet 1. Side edge wrappings 2 are provided on both sides of the rectangular filter sheet 1, and end edge wrappings 3 are provided at both ends of the rectangular filter sheet 1. The body of the rectangular filter sheet 1 is bent, and the two ends are fixedly connected by the two end edge wrappings 3 overlapping inside and outside. The edges of the filter cloth base layer 101, the two non-woven fabric film layers 102, and the two outer mesh layers 103 are fixedly connected by glue at the positions of the side edge wrappings 2 and the end edge wrappings 3. By providing the side edge wrappings 2 and the end edge wrappings 3 at the edges, the rectangular filter sheet 1 can be directly ultrasonically heat-pressed and fixed through the overlap of the two end edge wrappings 3 after being bent into a complete circle to form a cylindrical structure, without the need to set up corresponding glue coating equipment;

[0024] The rectangular filter sheet 1 includes a filter cloth base layer 101, two non-woven fabric coating layers 102 and two outer net layers 103. The material of the filter cloth base layer 101 is the existing non-woven filter cloth in the market. Both sides of the filter cloth base layer 101 are fixedly connected with non-woven fabric coating layers 102. The surfaces of both sides of the filter cloth base layer 101 and the surfaces of the two non-woven fabric coating layers 102 are fixedly connected by ultrasonic pressing. The non-woven fabric coating layer 102 is the existing polypropylene spunbond non-woven fabric with a specification of 20 g / ㎡ in the market. Outer net layers 103 are arranged on one side of the two non-woven fabric coating layers 102 away from the filter cloth base layer 101. The material of the outer net layer 103 is the existing mesh cloth product in the market. Adhesive spray layers 104 are arranged on the outer surfaces of the two non-woven fabric coating layers 102. The rectangular filter sheet 1 forms a filter layer structure of the filter element through the lamination of both sides of the filter cloth base layer 101 and the non-woven fabric coating layers 102. With the adhesive spray layer 104 arranged on the outside of the non-woven fabric coating layer 102, not only can the adhesive liquid infiltrated through the adhesive spray layer 104 be used for preliminary fixation during the ultrasonic lamination of both sides of the non-woven fabric coating layer 102 and the filter cloth base layer 101 to improve the stability of the lamination, but also a large number of tiny adhesive liquid droplets can be attached to the fibers of the non-woven fabric coating layer 102 at the microstructural level, enabling the non-woven fabric coating layer 102 to have a strong dust adsorption ability while ensuring a small thickness.

[0025] Working principle: The rectangular filter sheet 1 of the present invention forms a filter layer structure of the filter element through the lamination of both sides of the filter cloth base layer 101 and the non-woven fabric coating layers 102. With the adhesive spray layer 104 arranged on the outside of the non-woven fabric coating layer 102, not only can the adhesive liquid infiltrated through the adhesive spray layer 104 be used for preliminary fixation during the ultrasonic lamination of both sides of the non-woven fabric coating layer 102 and the filter cloth base layer 101 to improve the stability of the lamination, but also a large number of tiny adhesive liquid droplets can be attached to the fibers of the non-woven fabric coating layer 102 at the microstructural level, enabling the non-woven fabric coating layer 102 to have a strong dust adsorption ability while ensuring a small thickness. And the rectangular filter sheet 1 can be directly hot-pressed and fixed through the overlap of the two end edge wrappings 3 after being bent into a complete circle by arranging the side edge wrapping 2 and the end edge wrapping 3 at the edge, forming a cylindrical structure without setting corresponding glue coating equipment.

[0026] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the knowledge scope of those of ordinary skill in the art in the said technical field, various changes can be made without departing from the gist of the present invention.

Claims

1. A cylindrical filter element for a filter, comprising a rectangular filter sheet (1), characterized in that: Both sides of the rectangular filter (1) are provided with side edges (2), both ends of the rectangular filter (1) are provided with end edges (3), the body of the rectangular filter (1) is bent and the ends at both ends are fixedly connected by overlapping the two end edges (3) inside and outside; The rectangular filter sheet (1) comprises a filter cloth base layer (101), two non-woven fabric coating layers (102) and two outer mesh layers (103); the two sides of the filter cloth base layer (101) are fixedly connected with the non-woven fabric coating layers (102); the two sides of the non-woven fabric coating layers (102) away from the filter cloth base layer (101) are provided with outer mesh layers (103); and the outer surfaces of the two non-woven fabric coating layers (102) are provided with viscose spray layers (104).

2. A cylindrical filter element for a filter according to claim 1, characterized in that: The material of the filter cloth base layer (101) is non-woven filter cloth currently available on the market.

3. A cylindrical filter element for a filter according to claim 1, characterized in that: The non-woven fabric coating layer (102) is a polypropylene spunbonded non-woven fabric with a specification of 20 g / m2 available on the market.

4. A cylindrical filter element for a filter according to claim 1, characterized in that: The material of the outer mesh layer (103) is a mesh cloth product currently available on the market.

5. A cylindrical filter element for a filter according to claim 1, characterized in that: The two side surfaces of the filter cloth base layer (101) and the surfaces of the two non-woven fabric coating layers (102) are fixedly connected by ultrasonic pressing.

6. A cylindrical filter element for a filter according to claim 1, characterized in that: The edges of the filter cloth base layer (101), the two non-woven fabric coating layers (102) and the two outer mesh layers (103) are fixedly connected by glue at the positions of the side hemming (2) and the end hemming (3).

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