Poison filtering box of mask respirator

Abstract

The utility model discloses a poison filtering box of a mask respirator. The poison filtering box comprises a box body, a front cover and a filter element, a containing cavity is formed in the box body, a mounting port communicated with the containing cavity is formed in the rear end of the box body, and the box body is mounted on the mask respirator through the mounting port; the filter element is arranged in the accommodating cavity; the front cover is installed at the front end of the box body, an air passing gap is formed between the inner side wall of the front cover and the outer side wall of the box body, and the air passing gap is communicated with the containing cavity; the front cover is installed at the front end of the box body, and the air passing gap communicated with the containing cavity in the box body is formed between the inner side wall of the front cover and the outer side wall of the box body, so that the air inlet of the poison filtering box faces the face of a user, and the front cover facing the working end is not provided with any opening. And splashing substances generated in the working process cannot be splashed to the air inlet and cannot enter the poison filtering box to pollute a filtering material, so that the using effect of the poison filtering box is greatly improved, and the service life of the poison filtering box is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of mask respirators, in particular to a gas filter box of a mask respirator. Background Art

[0002] As we all know, in some working environments, there are a lot of dust and other harmful substances, such as mining, building stone, metal welding, chemical, pharmaceutical, waste and wastewater management, maintenance and cleaning, agriculture, food processing and tunnel construction. Workers engaged in these jobs must wear masks and respirators. Workers wear masks and respirators on their faces to filter out dust and other harmful substances, helping people to work normally in high-dust environments.

[0003] Existing mask respirators usually include a mask body, a gas filter box and a binding headband. The mask body is provided with a one-way inhalation port, a one-way exhalation port and a mounting buckle. The gas filter box is installed on the inhalation port, and the binding headband is installed on the mounting buckle. When in use, the staff wears the mask respirator on the head using the binding headband. When inhaling, the air can pass through the gas filter box and then enter the mask body from the inhalation port. When exhaling, the gas can be directly discharged from the exhalation port.

[0004] Among them, the gas filter box is an important component of the mask respirator. The gas filter box is filled with filter materials such as activated carbon agents, and removes dust and toxic and harmful gases in the air through physical adsorption and chemical reaction principles for people to breathe. For example, the authorization announcement number CN219251484U discloses a gas filter box with excellent performance in high humidity environments. It is a common gas filter box on the market, which usually includes an upper cover and a lower box body that are interlocked. The lower box body is provided with a molecular sieve layer and an activated carbon layer, and the upper cover is provided with an air inlet grid. The bottom of the lower box body is provided with an air guide groove, and the air guide groove guides the air to the air outlet. In this way, after the external air passes through the air inlet grid, it is filtered by the molecular sieve layer and the activated carbon layer, and then flows out through the air outlet.

[0005] However, it was observed that when this type of gas filter box is installed on the mask respirator, the air intake grille of the upper cover is facing outwards. The splashes generated during operation will directly splash onto the air intake grille and even enter the gas filter box to contaminate the filter material, greatly reducing the effectiveness of the gas filter box and shortening its service life.

[0006] In view of this, the designer has made in-depth considerations and actively researched, improved and tried to develop and design the present utility model in order to solve the many deficiencies and inconveniences caused by the imperfect structural design of the above-mentioned gas filter box. Utility Model Content

[0007] The utility model aims to provide a gas filter box for a mask respirator with good use effect and long service life.

[0008] In order to achieve the above purpose, the solution of the utility model is:

[0009] A gas filter box for a mask respirator, the gas filter box comprising a box body, a front cover and a filter element; a cavity is provided in the box body, a mounting port communicating with the cavity is provided at the rear end of the box body, and the box body is mounted on the mask respirator via the mounting port; the filter element is placed in the cavity; the front cover is mounted at the front end of the box body, an air gap is provided between the inner side wall of the front cover and the outer side wall of the box body, and the air gap is communicated with the cavity.

[0010] Preferably, the front cover is detachably mounted on the front end of the box body.

[0011] Preferably, a buckle is provided on the inner wall of the front cover, and a latch is provided on the outer wall of the box body, and the buckle is movably engaged with the latch.

[0012] Preferably, a top plate is provided on the inner wall of the front cover, a support block is provided on the outer wall of the box body, an inclined surface is provided on the support block, and one end of the top plate rests on the inclined surface.

[0013] Preferably, the side panels of the front cover are bent outwards in an arc shape.

[0014] Preferably, a transparent window portion is provided on the front cover.

[0015] Preferably, the box body is provided with an annular placement platform for placing the filter element, the placement platform encloses a guide cavity, the box body is provided with a plurality of guide plates in the placement platform, and two adjacent guide plates separate the guide cavity into a guide channel with an opening toward the installation port.

[0016] Preferably, a plurality of protrusions are provided on the placement platform at equal intervals.

[0017] Preferably, the cavity of the box body has a rectangular cross-section, and the outer wall of the filter element is tightly attached to the inner wall of the cavity.

[0018] Preferably, the filter element is made of one of glass fiber filter material, skeleton cloth filter material, plastic filter mesh composite filter material or metal filter mesh composite filter material, and the filter element is in a multi-folded shape.

[0019] After adopting the above scheme, the utility model installs the front cover at the front end of the box body, and provides an air gap connected to the cavity in the box body between the inner wall of the front cover and the outer wall of the box body. In this way, the air inlet of the filter box is facing the face of the user, and the front cover facing the working end is not provided with any opening. The splashing objects generated during the working process will not splash onto the air inlet, and will not enter the filter box to contaminate the filter material, thereby greatly improving the use effect of the filter box and extending the service life of the filter box.

[0020] Furthermore, the utility model provides an air gap between the inner wall of the front cover and the outer wall of the box body, which is connected to the cavity in the box body, and no air intake grid needs to be designed and processed on the front cover, which has the advantages of simple production and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a preferred embodiment of the utility model.

[0022] Figure 2 This is an exploded view of a preferred embodiment of the utility model.

[0023] Figure 3 It is a cross-sectional view of a preferred embodiment of the utility model.

[0024] Figure 4 It is a schematic structural diagram of the front cover in a preferred embodiment of the utility model.

[0025] Description of main component symbols:

[0026] In the figure: 1. box body; 11. cavity; 12. installation port; 13. ear; 14. support block; 141. inclined surface; 15. placement table; 151. protrusion; 16. guide cavity; 161. guide channel; 17. guide plate; 2. front cover; 21. buckle; 22. top plate; 23. window part; 3. filter element; 4. air gap. DETAILED DESCRIPTION

[0027] In order to further explain the technical solution of the present utility model, the present utility model is described in detail below through specific embodiments.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0029] like Figures 1 to 4As shown, it is a preferred embodiment of a gas filter box of a mask respirator of the utility model, the gas filter box comprises a box body 1, a front cover 2 and a filter element 3; a cavity 11 is provided in the box body 1, and a mounting port 12 connected to the cavity 11 is provided at the rear end of the box body 1, and the box body 1 is installed on the mask respirator through the mounting port 12; the filter element 3 is placed in the cavity 11; the front cover 2 is installed at the front end of the box body 1, and an air gap 4 is provided between the inner side wall of the front cover 2 and the outer side wall of the box body 1, and the air gap 4 is connected to the cavity 11.

[0030] During installation, the filter element 3 is placed in the cavity 11, and then the front cover 2 is installed on the box body 1, and the installation of the gas filter box is completed. During use, the gas filter box is installed on the mask respirator through the installation port 12. When the user wears the mask respirator for assisted breathing, the gas can enter the gas filter box from the air gap 4 between the front cover 2 and the box body 1, and then flow out from the installation port 12 after being filtered by the filter element 3 and enter the mask respirator to assist the user in breathing.

[0031] The key point of the utility model is that the utility model installs the front cover 2 at the front end of the box body 1, and provides an air gap 4 connected to the cavity 11 in the box body 1 between the inner wall of the front cover 2 and the outer wall of the box body 1. In this way, the air inlet of the filter box is facing the face of the user, and the front cover 2 facing the working end is not provided with any opening. The splashing objects generated during the working process will not splash onto the air inlet, and will not enter the filter box to contaminate the filter material, thereby greatly improving the use effect of the filter box and extending the service life of the filter box.

[0032] Furthermore, the utility model provides an air gap 4 between the inner wall of the front cover 2 and the outer wall of the box body 1, which is connected to the cavity 11 in the box body 1. There is no need to design and process an air intake grid on the front cover 2, which has the advantages of simple production and low cost.

[0033] The front cover 2 is detachably mounted on the front end of the box body 1. In this way, the user can remove the front cover 2 to maintain the filter box, and it is also convenient for the user to regularly replace the filter element 3 instead of replacing the entire filter box, thereby reducing the use cost of the filter box.

[0034] The inner wall of the front cover 2 is provided with a buckle 21, and the outer wall of the box body 1 is provided with a buckle 13, and the buckle 21 is movably engaged with the buckle 13. In this way, the front cover 2 and the box body 1 are detachably connected through the movably engaged buckle 21 with the buckle 13.

[0035] A top plate 22 is provided on the inner wall of the front cover 2, a support block is provided on the outer wall of the box body 1, an inclined surface 141 is provided on the support block, and one end of the top plate 22 rests on the inclined surface 141. In this way, when the front cover 2 is installed on the box body 1 through the cooperation between the buckle 21 and the ear 13, the top plate 22 can rest on the inclined surface 141 of the support block, which can facilitate the buckle 21 to be quickly inserted into the ear 13, and the inclined surface 141 of the support block can lift the front cover 2 through the top plate 22, so that an air gap 4 is left between the inner wall of the front cover 2 and the box body 1, and can also ensure that the front cover 2 is firmly installed on the box body 1 to prevent the front cover 2 from loosening.

[0036] The side plates of the front cover 2 are bent outwards in an arc shape, so that the air gap 4 can be enlarged and the air intake of the gas filter box can be increased.

[0037] The front cover 2 is provided with a transparent window portion 23. In this way, the user can observe the internal situation of the filter cartridge through the transparent window portion 23, and promptly and accurately judge whether the filter element 3 can continue to be used, so as to evaluate whether the filter cartridge needs to be replaced, thereby having the advantages of being easy to use and improving the safety of the filter cartridge.

[0038] The box body 1 is provided with an annular placement platform 15 for placing the filter element 3, and the placement platform 15 encloses a guide cavity 16. The box body 1 is provided with a plurality of guide plates 17 in the placement platform 15, and two adjacent guide plates 17 separate the guide cavity 16 into a guide channel 161 opening toward the installation port 12. In this way, when the user inhales, the filtered gas is inhaled into the mask respirator through the installation port 12, and the plurality of guide plates 17 separate the guide cavity 16 into a plurality of guide channels 161, thereby guiding the gas to form multiple airflows in the gas filter box, so that each part of the filter element 3 has a corresponding airflow passing through, thereby improving the use efficiency of the filter element 3 and improving the filtering effect of the gas filter box.

[0039] A plurality of convex points 151 are provided at equal intervals on the placement platform 15. In this way, the filter element 3 placed on the placement platform 15 will not be pressed against the placement platform 15, that is, the convex points 151 can leave a gap between the filter element 3 and the placement platform 15, and when the user inhales, the filtered gas is inhaled into the mask respirator through the installation port 12, and the airflow formed by the gas can also smoothly pass through the edge of the filter element 3, thereby further improving the use efficiency of the filter element 3 and the filtering effect of the gas filter box.

[0040] The cross section of the cavity 11 of the box body 1 is rectangular, and the outer wall of the filter element 3 is closely attached to the inner wall of the cavity 11. In this way, the cavity 11 in the box body 1 can be regular in shape, and the shape of the corresponding filter element 3 is also regular, so that the outer wall of the filter element 3 can be closely attached to the inner wall of the cavity 11, avoiding a gap between the filter element 3 and the inner wall of the box body 1, so that all gases can be filtered by the filter element 3.

[0041] The filter element 3 is made of one of glass fiber filter material, skeleton cloth filter material, plastic filter mesh composite filter material or metal filter mesh composite filter material, and the filter element 3 is bent and folded multiple times. In this way, the filter element 3 has the advantages of good circulation, easy breathing, and good filtering effect.

[0042] The above description of the specific exemplary embodiments of the utility model is for the purpose of illustration and demonstration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is obvious that many changes and variations can be made according to the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that ordinary technicians in the field can realize and use various different exemplary embodiments and various different selections and changes of the utility model. Any appropriate changes or modifications made by ordinary technicians in the technical field should be deemed to be within the patent scope of the utility model.

Claims

1. A gas filter box for a mask respirator, characterized in that: The gas filter box comprises a box body (1), a front cover (2) and a filter element (3); a cavity (11) is provided in the box body (1), a mounting port (12) communicating with the cavity (11) is provided at the rear end of the box body (1), and the box body (1) is mounted on the mask respirator via the mounting port (12); the filter element (3) is placed in the cavity (11); the front cover (2) is mounted at the front end of the box body (1), an air gap (4) is provided between the inner side wall of the front cover (2) and the outer side wall of the box body (1), and the air gap (4) is communicated with the cavity (11).

2. A gas filter cartridge for a mask respirator as claimed in claim 1, characterized in that: The front cover (2) is detachably mounted on the front end of the box body (1).

3. A gas filter cartridge for a mask respirator as claimed in claim 2, characterized in that: A buckle (21) is provided on the inner wall of the front cover (2), and a latch (13) is provided on the outer wall of the box body (1), and the buckle (21) is movably engaged with the latch (13).

4. A gas filter cartridge for a mask respirator as claimed in claim 3, characterized in that: A top plate (22) is provided on the inner wall of the front cover (2), a support block is provided on the outer wall of the box body (1), an inclined surface (141) is provided on the support block, and one end of the top plate (22) rests on the inclined surface (141).

5. The gas filter cartridge of a mask respirator according to claim 1, characterized in that: The side panels of the front cover (2) are bent outwards in an arc shape.

6. A gas filter cartridge for a face mask respirator as claimed in claim 1, characterized in that: The front cover (2) is provided with a transparent window portion (23).

7. A gas filter cartridge for a face mask respirator as claimed in claim 1, characterized in that: The box body (1) is provided with an annular placement platform (15) for placing the filter element (3), the placement platform (15) encloses a guide cavity (16), and the box body (1) is provided with a plurality of guide plates (17) in the placement platform (15), and two adjacent guide plates (17) separate the guide cavity (16) into a guide channel (161) opening toward the installation port (12).

8. A gas filter cartridge for a face mask respirator as claimed in claim 7, characterized in that: The placement platform (15) is provided with a plurality of convex points (151) at equal intervals.

9. A gas filter cartridge for a face mask respirator as claimed in claim 1, characterized in that: The chamber (11) of the box body (1) has a rectangular cross section, and the outer wall of the filter element (3) is tightly attached to the inner wall of the chamber (11).

10. A gas filter cartridge for a face mask respirator as claimed in claim 1, characterized in that: The filter core (3) is made of one of glass fiber filter material, skeleton cloth filter material, plastic filter mesh composite filter material or metal filter mesh composite filter material, and the filter core (3) is in a multiple-bent and folded shape.

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