Filter cartridge with folded filter element

Abstract

The utility model relates to a filter box with folding filter core belongs to the technical field of protection equipment, the filter box with folding filter core, including front casing, rear casing and folding filter core, the rear casing front end is provided with front casing, one end of front casing and rear casing hinged connection, the other end of front casing and rear casing buckle connection, the inside folding filter core of front casing and rear casing is equipped with, the folding filter core is integrative structure, the outer edge of folding filter core is provided with fusion circle, the folding filter core in fusion circle is wave -shaped folding structure, the upper of front casing is provided with the tight ring edge, the inside of rear casing is provided with sealing ring layer, the filter box with folding filter core, compact structure, clever design, solve the problem that the existing filter box has the poor filtering effect, especially suitable for the use demand of protection mask.

Description

Technical Field

[0001] This utility model relates to a filter box with a folded filter element, belonging to the technical field of protective equipment. Background Technology

[0002] In various industrial production environments, people often wear protective face shields to avoid inhaling dust and harming their health. Existing protective face shields, such as the dustproof box disclosed in the utility model patent with authorization announcement number CN201182847Y, while meeting the usage requirements to a certain extent, have the following problems: 1. The filter element installed in the existing dust box has a planar structure, which has the problem of poor filtration effect due to its relatively small filtration area.

[0003] 2. The filter element in the existing dust box is clipped between the front panel and the rear panel; in order to ensure the sealing effect of the filter element, a sealing ring is installed on the rear panel through an annular groove; the installation of the sealing ring has the problem of low assembly efficiency.

[0004] Therefore, it is necessary to develop a new filter cartridge to solve the above-mentioned problems of existing breathing filter cartridges. Summary of the Invention

[0005] The purpose of this utility model is to provide a filter box with a folded filter element that has a compact structure and ingenious design, so as to solve the problems of poor filtration effect and low assembly efficiency of existing breathing filter boxes.

[0006] The technical solution of this utility model is: A filter box with a pleated filter element includes a front housing, a rear housing, and a pleated filter element; the front housing is located at the front end of the rear housing; one end of the front housing is hinged to the rear housing; the other end of the front housing is fastened to the rear housing; characterized in that: the pleated filter element is installed inside the front housing and the rear housing; the pleated filter element has an integral structure; a fusion ring is provided on the outer edge of the pleated filter element; the pleated filter element inside the fusion ring has a wave-shaped pleated structure; a pressing ring is provided on the upper part of the front housing; a sealing ring layer is provided on the inner side of the rear housing; the sealing ring layer is integrally formed with the rear housing by injection molding; the pleated filter element is press-fitted between the pressing ring and the sealing ring layer through the fusion ring.

[0007] The folded filter core includes a surface layer, a middle layer, and a bottom layer; the middle layer and the bottom layer are arranged sequentially below the surface layer; the surface layer, the middle layer, and the bottom layer are stacked to form a wave-shaped folded structure; the outer edges of the surface layer, the middle layer, and the bottom layer are welded together by heating to form a fusion ring.

[0008] The outer layer is non-woven fabric; the middle layer is electrostatic cotton; and the bottom layer is meltblown fabric.

[0009] The front and rear housings are generally curved; the front housing has multiple ventilation windows evenly distributed on it; the front housing has a pressing ring ridge inside the outer ring of the ventilation windows; one end of the front housing has a hinge pin; and the other end of the front housing has a fastening hole.

[0010] One end of the rear housing is provided with a hinge seat; the other end of the rear housing is provided with an elastic latch; the middle of the rear housing is provided with an output ring; multiple snap-fit ​​slots are evenly arranged inside the output ring; a support ridge is provided inside the rear housing of the outer ring of the output ring; a sealing ring groove is provided inside the rear housing; a sealing ring layer is provided in the sealing ring groove by integral injection molding.

[0011] The advantages of this utility model are: This filter cartridge with a folded filter element has a compact structure and ingenious design. By folding the filter element, the filtration area is increased, solving the problem of poor filtration effect in existing filter cartridges. In addition, the sealing ring in the rear shell is integrally injection molded inside the shell, thus solving the problem of low assembly efficiency when manually assembling existing sealing rings. It is particularly suitable for the use of protective masks. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 This is a schematic diagram of the structure of this utility model; Figure 4 This is a top view of the structure of this utility model; Figure 5 for Figure 4 Schematic diagram of the structure in the AA direction; Figure 6 This is a schematic diagram of the front housing of this utility model; Figure 7 This is a schematic diagram of the structure of the rear shell of this utility model; Figure 8 This is a schematic diagram of the structure of the rear shell of this utility model; Figure 9 This is a schematic diagram of the structure of the rear shell of this utility model; Figure 10 This is a schematic diagram of the structure of the folded filter core of this utility model; Figure 11 for Figure 3 Enlarged structural diagram at point B; Figure 12 for Figure 5 A magnified structural diagram at point C.

[0013] In the diagram: 1. Front housing; 2. Rear housing; 3. Folded filter element; 4. Fusion ring; 5. Compression ring ridge; 6. Sealing ring layer; 7. Vent window; 8. Hinge pin; 9. Snap-fit ​​hole; 10. Hinge seat; 11. Elastic snap tongue; 12. Output ring; 13. Snap-fit ​​groove; 14. Support ridge; 15. Sealing ring groove. Detailed Implementation

[0014] The filter cartridge with a pleated filter element includes a front housing 1, a rear housing 2, and a pleated filter element 3 (see the attached instruction manual). Figure 1 , 2 and 3).

[0015] The front housing 1 is located at the front end of the rear housing 2 (see the instruction manual appendix). Figure 3 The front housing 1 and the rear housing 2 are curved as a whole (see the instruction manual appendix). Figure 3 The purpose of designing the front housing 1 and the rear housing 2 in an arc shape is to increase the overall filtration area of ​​the filter box by taking advantage of the fact that the area of ​​the arc shape is larger than that of the plane.

[0016] The front housing 1 has multiple ventilation windows 7 evenly distributed on it; the front housing 1 has a pressing ring 5 inside the outer ring of the ventilation windows 7; one end of the front housing 1 is provided with a hinge pin 8; the other end of the front housing 1 is provided with a fastening hole 9 (see the instruction manual appendix). Figure 4 and 6 ).

[0017] A hinge seat 10 is provided at one end of the rear housing 2; a resilient latch 11 is provided at the other end of the rear housing 2 (see the instruction manual appendix). Figure 7 and 8 One end of the front housing 1 is hinged to the rear housing 2 via a hinge pin 8 and a hinge seat 10. The other end of the front housing 1 is fastened to the rear housing 2 via a fastening hole 9 and a resilient fastening tongue 11.

[0018] An output ring 12 is provided in the middle of the rear housing 2; multiple snap-fit ​​slots 13 are evenly arranged inside the output ring 12 (see the instruction manual). Figure 3 and 10 During assembly, the filter box is engaged with the mask body via the output ring 12 and the snap-fit ​​slot 13.

[0019] The rear housing 2 has a support rib 14 inside the outer ring of the output ring 12 (see the instruction manual appendix). Figure 6 The purpose of setting the support ridge 14 is to ensure that after assembly, the folded filter core 3 has a certain gap with the inner wall of the rear housing 2 under the support of the support ridge 14, so as to avoid the problem of obstructing airflow when the folded filter core 3 is in contact with the inner wall of the rear housing 2.

[0020] The rear housing 2 has a sealing ring groove 15 inside; a sealing ring layer 6 is integrally injection molded inside the sealing ring groove 15 (see the instruction manual). Figure 5 , 6 (and 11). The purpose of this arrangement of the sealing ring 6 is to avoid the problem of low assembly efficiency caused by the need for reassembly after the sealing ring 6 and the rear housing 2 are manufactured separately. The sealing ring 6 is made of a flexible material with the characteristic of elastic deformation under pressure.

[0021] The front housing 1 and the rear housing 2 are equipped with pleated filter elements 3; the pleated filter elements 3 are integral structures; a fusion ring 4 is provided on the outer edge of the pleated filter elements 3; the pleated filter elements 3 inside the fusion ring 4 have a wave-shaped pleated structure.

[0022] The pleated filter element 3 comprises a surface layer, a middle layer, and a bottom layer; the surface layer is non-woven fabric; the middle layer is electrostatic cotton; and the bottom layer is meltblown fabric. The middle layer and bottom layer are sequentially arranged below the surface layer; the surface layer, middle layer, and bottom layer, when stacked, form a wave-shaped pleated structure; the outer edges of the surface layer, middle layer, and bottom layer are welded together by heat welding to form a fusion ring 4 (see instruction manual appendix). Figure 9 ).

[0023] When the front housing 1 and the rear housing 2 are fastened together, a pleated filter element 3 is press-fitted between the clamping ring 5 and the sealing ring 6 through the fusion ring 4. With the cooperation of the clamping ring 5 and the sealing ring 6, the pleated filter element 3 can be sealed around its perimeter. Thus, during operation, the airflow entering the front housing 1 through the ventilation window 7 can only be filtered by the pleated filter element 3 before it can enter the mask body through the rear housing 2; thus, the purpose of filtering breathing air is achieved.

[0024] This filter cartridge with a folded filter element is compact and ingeniously designed. By folding the filter element, it increases the filtration area, effectively extends the service life, reduces the frequency of filter element replacement, and lowers breathing resistance, making it easier for users to breathe while wearing it. This solves the problem of poor filtration effect in existing filter cartridges. In addition, the sealing ring 6 in the rear shell 2 is integrally injection molded inside the shell, thus solving the problem of low assembly efficiency that exists when the sealing ring is manually assembled. It is particularly suitable for the use of protective masks.

Claims

1. A filter box with a pleated filter element, comprising a front housing (1), a rear housing (2), and a pleated filter element (3); the front housing (1) is disposed at the front end of the rear housing (2); one end of the front housing (1) is hinged to the rear housing (2); the other end of the front housing (1) is fastened to the rear housing (2); characterized in that: The front housing (1) and the rear housing (2) are equipped with pleated filter cores (3); the pleated filter cores (3) are integral structures; a fusion ring (4) is provided on the outer edge of the pleated filter cores (3); the pleated filter cores (3) inside the fusion ring (4) are wavy pleated structures; a pressing ring ridge (5) is provided on the upper part of the front housing (1); a sealing ring layer (6) is provided on the inner side of the rear housing (2); the sealing ring layer (6) is integrally formed with the rear housing (2) by integral injection molding; the pleated filter cores (3) are press-fitted between the pressing ring ridge (5) and the sealing ring layer (6) through the fusion ring (4).

2. A filter box with a pleated filter element according to claim 1, characterized in that: The folded filter core (3) includes a top layer, a middle layer, and a bottom layer; Below the surface layer are a middle layer and a bottom layer, respectively; The surface layer, intermediate layer and bottom layer are stacked together to form a wave-shaped folded structure; the outer edges of the surface layer, intermediate layer and bottom layer are welded together by heating to form a fusion ring (4).

3. A filter box with a pleated filter element according to claim 2, characterized in that: The surface layer is non-woven fabric; The middle layer is electrostatic cotton; the bottom layer is meltblown fabric.

4. A filter box with a pleated filter element according to claim 1, characterized in that: The front housing (1) and the rear housing (2) are curved in shape; multiple ventilation windows (7) are evenly distributed on the front housing (1); a pressing ring rib (5) is provided inside the front housing (1) around the ventilation window (7); a hinge pin (8) is provided at one end of the front housing (1); and a fastening hole (9) is provided at the other end of the front housing (1).

5. A filter box with a pleated filter element according to claim 4, characterized in that: The rear housing (2) is provided with a hinge seat (10) at one end; the rear housing (2) is provided with an elastic latch (11) at the other end; the rear housing (2) is provided with an output ring (12) in the middle; the output ring (12) is provided with a plurality of snap-fit ​​slots (13) evenly arranged inside; the rear housing (2) of the outer ring of the output ring (12) is provided with a support ridge (14); the rear housing (2) is provided with a sealing ring groove (15) inside; a sealing ring layer (6) is provided in the sealing ring groove (15) by integral injection molding.

Images