Protective cover for filter cartridges

Abstract

This invention provides a protective cover for a filter cartridge. In one embodiment, the filter cartridge has a pre-filter layer, and the protective cover includes a cover body for covering and protecting the pre-filter layer when installed into the filter cartridge; wherein the cover body is configured to conform to the shape of the pre-filter layer.

Description

Technical Field

[0001] This utility model relates to the field of protective equipment technology, and in particular to a protective cover for a filter cartridge. Background Technology

[0002] In work environments with solid or liquid particulate matter such as dust and gaseous pollutants such as organic vapors (e.g., grinding, welding), respiratory protective equipment (such as gas masks) is typically required. The filter cartridge is one of the core components of respiratory protective equipment (such as gas masks), and its main function is to filter and adsorb specific toxic gases and vapors in the inhaled air, protecting the wearer from harmful chemicals.

[0003] Air filter cartridges typically have a pre-filter layer at the air inlet. The main function of this pre-filter layer is to filter solid or liquid particulate matter such as dust and aerosols, protecting the filter element in the air filter cartridge from contamination or clogging by these particles, thereby extending the service life of the air filter cartridge and ensuring its effectiveness in protecting against gaseous pollutants.

[0004] In existing air filter cartridges, the pre-filter layer is located at the front of the air inlet and is directly exposed to the external environment. In practice, taking a welding work site as an example, firstly, because the pre-filter layer is directly exposed to the welding environment, it is easily contaminated, thus affecting the lifespan of the pre-filter layer and even the entire filter cartridge. Secondly, the pre-filter layer is prone to collapse or deformation under external forces, thus affecting the filtration quality. Furthermore, during welding operations, welding sparks can easily splash onto the pre-filter layer, posing a safety hazard. Utility Model Content

[0005] The purpose of this utility model is to solve at least one aspect of the aforementioned problems and defects existing in the prior art.

[0006] According to one aspect of the present invention, a protective cover for a filter cartridge is provided, the filter cartridge having a pre-filter cotton layer, wherein the protective cover includes a cover body for covering and protecting the pre-filter cotton layer when installed into the filter cartridge; wherein the cover body is configured to match the shape of the pre-filter cotton layer.

[0007] According to some exemplary embodiments of the present invention, the pre-filter cotton layer has a shape that protrudes from the filter cartridge, and the cover has a protrusion shape that matches the protrusion shape of the pre-filter cotton layer.

[0008] According to some exemplary embodiments of the present invention, the pre-filter cotton layer has a dome shape protruding from the filter cartridge; the cover has a dome shape that matches the dome shape of the pre-filter cotton layer.

[0009] According to some exemplary embodiments of the present invention, the cover is configured such that when the protective cover is installed on the filter cartridge, there is a gap between the inner surface of the cover and the pre-filter cotton layer of the filter cartridge.

[0010] According to some exemplary embodiments of the present invention, the gap is in the range of about 4 mm to about 10 mm.

[0011] According to some exemplary embodiments of the present invention, the cover has a plurality of rib members, which are arranged at intervals on the inner surface of the cover in the circumferential direction; and the plurality of rib members and the cover are integrally formed.

[0012] According to some exemplary embodiments of the present invention, the cover has a ventilation structure, the ventilation structure including: one or more ventilation ports, the ventilation ports being opened at the top of the cover; and / or one or more sets of ventilation openings, each set of ventilation openings being arranged at intervals along the circumferential direction of the cover.

[0013] According to some exemplary embodiments of the present invention, the ventilation structure includes multiple sets of ventilation openings, and the outer surface of the cover is formed with multiple stepped portions corresponding to the multiple sets of ventilation openings; wherein, each set of ventilation openings is disposed at a corresponding step portion of the multiple stepped portions.

[0014] According to some exemplary embodiments of the present invention, the protective cover further includes: a connecting portion integrally joined to the cover body, and the connecting portion is used to detachably install the protective cover to the filter cartridge.

[0015] According to some exemplary embodiments of the present invention, the connecting portion is connected to the filter cartridge body by a press fit, so as to detachably install the protective cover to the filter cartridge.

[0016] The protective cover for the filter cartridge provided according to the foregoing embodiments of this utility model can be installed on the outside of the pre-filter cotton layer of the filter cartridge to cover and protect the pre-filter cotton layer (for example, to prevent the pre-filter cotton layer from being easily contaminated due to complete exposure to the external environment, to prevent the pre-filter cotton layer of the filter cartridge from collapsing or deforming due to external forces, and to prevent welding sparks from splashing onto the pre-filter cotton layer during welding operations), thereby extending the service life of the pre-filter cotton layer and even the entire filter cartridge.

[0017] Other objects and advantages of the present invention will become apparent from the following description of the invention with reference to the accompanying drawings, and will help to provide a comprehensive understanding of the invention. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram showing the protective cover installed into the filter cartridge according to an exemplary embodiment of the present invention;

[0019] Figure 2 This is a front view structural diagram showing the protective cover installed on the filter cartridge according to an exemplary embodiment of the present invention;

[0020] Figure 3 It is along Figure 2 A schematic diagram of the cross-sectional structure cut along line AA;

[0021] Figure 4 This is a three-dimensional structural schematic diagram showing the protective cover according to an exemplary embodiment of the present invention;

[0022] Figure 5 This is a front view structural schematic diagram showing the protective cover according to an exemplary embodiment of the present invention;

[0023] Figure 6 It is along Figure 5 A schematic diagram of the cross-sectional structure cut along the BB line;

[0024] Figure 7 This is a bottom view of the protective cover according to an exemplary embodiment of the present invention.

[0025] Figure 8 This is a top view of the protective cover according to an exemplary embodiment of the present invention.

[0026] Figures 9 to 14 These are three-dimensional structural diagrams showing the protective cover according to different alternative embodiments of the present invention. Detailed Implementation

[0027] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings. In this specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of this utility model with reference to the accompanying drawings is intended to explain the overall inventive concept of this utility model and should not be construed as a limitation thereof.

[0028] Furthermore, in the following detailed description, numerous specific details are set forth for ease of explanation to provide a thorough understanding of the embodiments disclosed herein. However, it will be apparent that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and apparatuses are illustrated to simplify the figures.

[0029] Figures 1 to 3 These are schematic diagrams showing the structure of the protective cover installed on the filter cartridge according to an exemplary embodiment of the present invention from different perspectives. Figures 4 to 8 These are schematic diagrams showing the structure of the protective cover according to an exemplary embodiment of the present invention from different perspectives.

[0030] Filter cartridges are primarily used in respiratory protective equipment (such as gas masks) to filter and adsorb specific toxic gases and vapors in inhaled air, protecting the wearer from harmful chemicals. See also Figures 1 to 3 The filter cartridge 1 typically includes a housing 10 containing a filter element and a pre-filter cotton layer 90 located at the air inlet of the housing 10. The filter element is mainly used to filter and adsorb specific toxic gases and vapors in the inhaled air, while the pre-filter cotton layer 90 is mainly used to filter and adsorb solid or liquid particulate matter such as dust aerosols in the air.

[0031] See Figures 1 to 8 According to an exemplary embodiment of the present invention, a protective cover 2 for a filter cartridge 1 is provided. The protective cover 2 includes a cover body 21 and a connecting portion 22 made of a material such as polypropylene (PP) or thermoplastic elastomer (TPE). The cover body 21 is used to cover and protect the pre-filter layer 90 when installed in the filter cartridge 1, and the connecting portion 22 is used to achieve an effective connection between the protective cover 2 and the filter cartridge 1 when installed in the filter cartridge 1. According to the present invention, the cover body 21 is configured to match the shape of the pre-filter layer 90. That is, in the protective cover 2 provided by the present invention, the shape and / or contour of the cover body 21 matches the shape and / or contour of the pre-filter layer 90 of the filter cartridge 1. The term "matching" as described herein can be understood as the shape of the cover body 21 being designed to be substantially the same as or substantially similar to the shape of the pre-filter layer 90 of the filter cartridge 1. For example, when the pre-filter cotton layer 90 of the filter cartridge 1 has a shape that protrudes from the filter cartridge 1, in the protective cover 2 provided by this utility model, the cover body 21 is designed to have a protruding shape that matches the protruding shape of the pre-filter cotton layer 90. Figures 1 to 3 As shown in the illustrated exemplary embodiment, the pre-filter cotton layer 90 of the filter cartridge 1 has a dome shape protruding from the filter cartridge 1; correspondingly, the cover 21 of the protective cover 2 provided by this invention is designed to have a dome shape that matches the dome shape of the pre-filter cotton layer 90. Thus, the protective cover 2 provided by this invention can be installed on the outside of the pre-filter cotton layer of the filter cartridge to cover and protect the pre-filter cotton layer (e.g., to prevent the pre-filter cotton layer from being easily contaminated due to complete exposure to the external environment, to prevent the pre-filter cotton layer of the filter cartridge from collapsing or deforming due to external forces, and to prevent welding sparks from splashing onto the pre-filter cotton layer during welding operations), thereby extending the service life of the pre-filter cotton layer and even the entire filter cartridge.

[0032] However, it should be noted that, from a shape perspective, when the pre-filter cotton layer 90 of the filter cartridge 1 has a shape with a specific curvature, the cover 21 of the protective cover 2 can be designed to have the same or similar shape with a specific curvature. For example, when the pre-filter cotton layer 90 of the filter cartridge 1 has a circular protrusion shape with a specific curvature, the cover 21 of the protective cover 2 can be designed to have the same or similar shape with a circular protrusion shape. As another example, when the pre-filter cotton layer 90 of the filter cartridge 1 has other shapes, such as a flat plate shape, the cover 21 of the protective cover 2 provided by this invention can be designed to be a basically flat plate shape or a circular protrusion shape with a certain specific curvature similar to a basically flat plate shape.

[0033] See Figures 1 to 3 In the illustrated exemplary embodiment of the present invention, the pre-filter cotton layer 90 of the filter cartridge 1 has a substantially circular dome shape, and correspondingly, the cover 21 of the protective cover 2 is designed to have a cup-shaped shape with a substantially circular dome. Furthermore, the cover 21 is configured such that when the protective cover 2 is installed onto the filter cartridge 1, a gap G exists between the inner surface 211 of the cover 21 and the pre-filter cotton layer 90 of the filter cartridge. In the illustrated exemplary embodiment of the present invention, a uniform gap G exists between the inner surface 211 of the cover 21 and the pre-filter cotton layer 90 of the filter cartridge, and the gap G is approximately 6 mm, thereby effectively improving the uniformity of airflow distribution. According to the present invention, the gap G can be adjusted within the range of approximately 4 mm to approximately 10 mm according to actual design requirements. Furthermore, the gap between the inner surface 211 of the cover 21 and the pre-filter cotton layer 90 of the filter cartridge can also be non-uniform. By maintaining the aforementioned gap between the cover 21 and the pre-filter cotton layer 90 of the filter cartridge 1, on the one hand, the pre-filter cotton layer 90 can be prevented from being squeezed and deformed due to the cover 21, and on the other hand, airflow diffusion can be achieved between the cover 21 and the pre-filter cotton layer 90, thereby maintaining smooth airflow.

[0034] See Figures 1 to 3 In the protective cover 2 provided by this utility model, the connecting portion 22 for detachably installing the protective cover 2 to the filter cartridge 1 is integrally combined with the cover body 21. Specifically, as shown in the figure... Figures 1 to 3 and Figure 6As shown, the connecting portion 22 includes a plurality of protrusions 220 formed on the inner surface 211 of the cover 21. When the connecting portion 22 of the cover 21 is connected to the housing 10 of the filter cartridge 1 by a press fit (e.g., a snap-fit ​​fit), these protrusions 220 undergo elastic deformation under pressure to fasten to the periphery of the defined air inlet of the filter cartridge 1, thereby detachably installing the protective cover 2 to the filter cartridge 1 and pressing the edge of the pre-filter cotton layer 90 so that it is airtightly attached to the housing 10 of the filter cartridge 1, thereby ensuring that gas can only enter through the filter cotton layer 90, thus ensuring the pre-filtration effect of the filter cotton layer is achieved. However, it should be noted that in other embodiments, the connecting portion 22 may adopt other structures, or may be detachably connected to the housing 10 of the filter cartridge 1 by other means besides press fit, as long as the protective cover 2 can be effectively connected and combined to the filter cartridge 1. According to this utility model, since the protective cover 2 provided by this utility model can be detachably combined with the box body 10, the protective cover 2 provided by this utility model can be reused, thereby reducing costs.

[0035] See also Figures 1 to 8 According to this utility model, the cover 21 has multiple rib members 212. Specifically, in such a case... Figure 6 and Figure 7 In the exemplary embodiment shown, six ribs 212 are arranged at intervals on the inner surface 211 of the cover 21 in the circumferential direction; and these ribs 212 and the cover 21 are integrally formed. By providing ribs, the structural stability of the cover 21 can be enhanced to improve its resistance to deformation, and the uniformity of the gap G between the inner surface 211 of the cover 21 and the pre-filter cotton layer 90 of the filter cartridge can be maintained. In addition, airflow can be guided along the gaps between the ribs, which is beneficial to the diffusion of airflow. Furthermore, according to the exemplary embodiment of the present invention, the plurality of ribs 212 are arranged around the center of the cover 21, and the filter cotton layer 90 can be centrally positioned by contacting the pre-filter cotton layer 90 of the filter cartridge 1.

[0036] See also Figures 1 to 8 In the protective cover 2 provided by this utility model, the cover body 21 has a ventilation structure for realizing gas flow. According to the concept of this utility model, the ventilation structure can adopt various feasible shapes and / or designs. For example, the ventilation structure may include: one or more ventilation ports 218 and / or one or more sets of ventilation openings 219. Figures 1 to 8 In the exemplary embodiment shown, the protective cover 2 has a shape and design with a single large-diameter vent 218. Specifically, the vent 218 can be located at the top of the cover 21, and multiple rib members 212 are arranged around the vent 218. Of course, the specific shape and / or design of the ventilation structure are not limited to... Figures 1 to 8 The exemplary embodiments shown herein illustrate that, Figures 9 to 14 These are perspective structural diagrams showing protective covers according to different alternative embodiments of the present invention. For example, in Figure 9 In the protective cover 2A disclosed in the alternative embodiment shown, in addition to a single large-diameter vent 218A opened at the top of the cover 21, a set of vent openings 219A arranged at intervals along the circumferential direction of the cover 21 are also opened on the circumferential wall of the cover 21. For example, in Figure 10 In the protective cover 2B disclosed in the alternative embodiment shown, a set of ventilation openings 219B arranged at intervals along the circumferential direction of the cover 21 are formed only on the circumferential wall of the cover 21. For example, in Figure 11 In the protective cover 2C disclosed in the alternative embodiment shown, in addition to a single large-diameter vent 218C opened at the top of the cover 21, two sets of vent openings 219C are also provided on the circumferential wall of the cover 21, arranged at intervals along the circumferential direction of the cover 21. For example, in Figure 12 In the protective cover 2D disclosed in the alternative embodiment shown, only a set of ventilation openings 219D are provided on the circumferential wall of the cover 21, arranged at intervals along the circumferential direction of the cover 21. According to this invention, when the ventilation structure includes multiple sets of ventilation openings, the outer surface of the cover 21 forms multiple stepped portions 210 corresponding to the multiple sets of ventilation openings; wherein each set of ventilation openings is provided at a corresponding step portion 210 of the multiple stepped portions 210. For example, in Figure 13 In the protective cover 2E disclosed in the alternative embodiment shown, in addition to a single large-diameter vent 218E opened at the top of the cover 21, two sets of vent openings 219E are also provided on the circumferential wall of the cover 21, arranged at intervals along the circumferential direction of the cover 21. Specifically, the outer surface of the cover 21 forms two stepped portions 210 corresponding to the two sets of vent openings; wherein each set of vent openings is located at a corresponding stepped portion 210. For example, in Figure 14 In the protective cover 2F disclosed in the alternative embodiment shown, only the circumferential wall of the cover 21 has two sets of ventilation openings 219F arranged at intervals along the circumferential direction of the cover 21. Specifically, the outer surface of the cover 21 forms two stepped portions 210 corresponding to the two sets of ventilation openings; wherein each set of ventilation openings is located at a corresponding stepped portion 210. It should be noted that, although Figures 9 to 14 Various feasible shapes and / or designs of ventilated structures are shown, but these are merely exemplary and non-limiting, and are not intended to limit the shapes and / or designs of ventilated structures to only these shapes and / or designs.

[0037] It should be noted that the protective cover provided by this utility model can be applied not only to filter cartridges, but also to working environments such as chemical and mining industries where there is a risk of mechanical damage or liquid splashing.

[0038] Although the present invention has been described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to illustrate preferred embodiments of the present invention and should not be construed as a limitation thereof.

[0039] While some embodiments of the present invention have been shown and described, those skilled in the art will understand that changes may be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

[0040] Although the present invention has been described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to illustrate preferred embodiments of the present invention and should not be construed as a limitation thereof.

[0041] While some embodiments of the present invention have been shown and described, those skilled in the art will understand that changes may be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A protective cover (2) for a filter cartridge (1), the filter cartridge (1) having a pre-filter cotton layer (90), characterized in that, The protective cover (2) includes a cover (21) for covering and protecting the pre-filter cotton layer (90) when it is installed into the filter cartridge (1). The cover (21) is configured to match the shape of the pre-filter cotton layer (90).

2. The protective cover (2) according to claim 1, characterized in that, The pre-filter cotton layer (90) has a shape that protrudes from the filter cartridge (1), and The cover (21) has a raised shape that matches the raised shape of the pre-filter cotton layer (90).

3. The protective cover (2) according to claim 2, characterized in that, The pre-filter cotton layer (90) has a dome shape that protrudes from the filter cartridge (1); The cover (21) has a dome shape that matches the dome shape of the pre-filter cotton layer (90).

4. The protective cover (2) according to any one of claims 1 to 3, characterized in that, The cover (21) is configured such that when the protective cover (2) is installed on the filter cartridge (1), there is a gap (G) between the inner surface (211) of the cover (21) and the pre-filter cotton layer (90) of the filter cartridge (1).

5. The protective cover (2) according to claim 4, characterized in that, The gap (G) is in the range of 4 mm to 10 mm.

6. The protective cover (2) according to any one of claims 1 to 3, characterized in that, The cover (21) has multiple rib members (212). The plurality of rib members (212) are arranged at intervals on the inner surface (211) of the cover (21) in the circumferential direction; and The plurality of rib members (212) and the cover (21) are integrally formed.

7. The protective cover (2) according to any one of claims 1 to 3, characterized in that, The cover (21) has a ventilation structure, which includes: One or more vents (218) are provided at the top of the cover (21); and / or One or more sets of ventilation openings (219), each set of ventilation openings (219) is arranged at intervals along the circumferential direction of the cover (21).

8. The protective cover (2) according to claim 7, characterized in that, The ventilation structure includes multiple sets of ventilation openings (219), and the outer surface of the cover (21) has multiple stepped portions (210) corresponding to the multiple sets of ventilation openings (219). Each set of ventilation openings (219) is located at a corresponding step (210) of the plurality of step sections (210).

9. The protective cover (2) according to any one of claims 1 to 3, characterized in that, The protective shield (2) also includes: The connecting part (22) is integrally joined to the cover (21) and is used to detachably install the protective cover (2) to the filter box (1) and to attach the edge of the pre-filter cotton layer (90) to the box body (10) of the filter box (1).

10. The protective cover (2) according to claim 9, characterized in that, The connecting part (22) is connected to the housing (10) of the filter cartridge (1) by press fitting, so that the protective cover (2) can be detachably installed to the filter cartridge (1).

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