A filter and a gas mask

Abstract

The utility model discloses a filter box and antidote appliance, and is placed basically vertically when using, and its characterized in that includes: casing, is provided with mounting groove and air outlet, and air outlet communicates with mounting groove, and the first side opening of mounting groove is to horizontal, and the second side opening of air outlet is to horizontal, filter assembly is set up in mounting groove, cover, and the first side of casing is transversely set up, and the cover includes panel and the fence that surrounds and is connected to panel, and the fence extends to the outer circumferential side of casing, and the rim of fence and the opening end surface of mounting groove form the water retaining distance L of baffle, and, and the opening end of mounting groove retains the first air inlet gap S1 of panel, and the inner circumferential side of fence and the outer circumferential side of casing retain the second air inlet gap S2, and the outside air enters mounting groove in proper order by second air inlet gap S2 and first air inlet gap S1, and then, after filter assembly, is discharged by air outlet.

Description

Technical Field

[0001] This utility model relates to the field of respiratory protection technology, and in particular to a filter cartridge and a protective device. Background Technology

[0002] Most existing filter cartridges use an air inlet at the front of the cover and lack rain protection. If exposed to rain outdoors, the internal filter components that adsorb toxic gases will become damp, affecting the adsorption effect and even rendering them unusable.

[0003] With market demand and technological development, there is also a solution that involves adding an extra rain cover, with a downward-sloping air inlet on the rain cover. However, its air intake cross-section is small, which is not conducive to smooth breathing.

[0004] Therefore, it is necessary to optimize the filter cartridge. Utility Model Content

[0005] In order to overcome at least one of the defects of the prior art, the present invention provides a filter cartridge and a gas protection device, which has a rainproof function and a large air intake section.

[0006] The technical solution adopted by this utility model to solve its problem is:

[0007] A filter cartridge, which is placed in a substantially vertical position during use, includes:

[0008] The housing has a mounting groove and an air outlet. The air outlet is connected to the mounting groove. The mounting groove opens to a first side in a horizontal direction, and the air outlet opens to a second side in a horizontal direction.

[0009] The filter assembly is installed in the mounting slot;

[0010] The cover is laterally fitted onto the first side of the housing. The cover includes a panel and a surrounding plate connected to the panel. The surrounding plate extends to the outer periphery of the housing, so that the edge of the surrounding plate forms a water-blocking distance L with the opening end face of the mounting groove.

[0011] Furthermore, the panel and the opening end of the mounting groove have a first air intake gap S1, and the inner circumference of the enclosure and the outer circumference of the housing have a second air intake gap S2. After the external air enters the mounting groove through the second air intake gap S2 and the first air intake gap S1, it passes through the filter assembly and is then discharged through the air outlet.

[0012] Furthermore, the water-blocking distance L is between 10mm and 25mm.

[0013] Furthermore, the water-blocking distance L is greater than twice the second air intake gap S2, and the second air intake gap S2 is greater than the first air intake gap S1.

[0014] Furthermore, the enclosure is inclined, and the cross-sectional size of the cavity surrounded by the enclosure gradually increases in the direction away from the panel.

[0015] Furthermore, baffles are provided on the outer peripheral side of the housing and / or the inner peripheral side of the enclosure. When the enclosure is deformed by compression, the baffles are used to abut against the housing or enclosure to keep the second air intake gap S2 within a controllable range.

[0016] Furthermore, the filter assembly includes filter cotton, a middle isolation layer, a middle partition, activated carbon, and a bottom isolation layer. The middle partition has multiple air vents. The filter cotton, middle isolation layer, middle partition, activated carbon, and bottom isolation layer are stacked in the mounting groove from the outside to the inside. The filter cotton is closer to the opening end of the mounting groove, the bottom isolation layer is closer to the air outlet, and the middle partition and activated carbon are fixedly installed together. The activated carbon is shaped and supported by the middle partition.

[0017] Furthermore, a plurality of first positioning posts are provided circumferentially on the surface of the partition plate facing the middle isolation layer, and the first positioning posts abut against the middle isolation layer.

[0018] Furthermore, multiple second positioning posts are provided circumferentially at the bottom of the mounting groove, and the second positioning posts abut against the bottom isolation layer.

[0019] Furthermore, the interior of the shell is also provided with a support component, which is positioned corresponding to the air outlet. The support component is circumferentially hollowed out, and its end abuts against the bottom isolation layer.

[0020] Based on the same concept, a gas protection device is also provided, including a face mask and a filter cartridge as described above, the filter cartridge being connected to the face mask.

[0021] In summary, the filter cartridge provided by this utility model has the following technical effects:

[0022] By employing a cover-type enclosure and ensuring a water-blocking distance L between the edge of the enclosure and the opening of the mounting groove, a first air intake gap S1 is maintained between the panel and the opening of the mounting groove, and a second air intake gap S2 is maintained between the inner circumference of the enclosure and the outer circumference of the housing. This creates a circumferential air intake channel, providing both rain protection and a large air intake cross-section. The structure is simple and low-cost, solving the problem of existing filter cartridges being unable to simultaneously achieve both rain protection and air intake. Other beneficial effects will be demonstrated in the specific embodiments. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of the filter cartridge according to an embodiment of the present utility model;

[0024] Figure 2 This is an exploded structural diagram of the filter cartridge according to an embodiment of the present invention;

[0025] Figure 3This is a schematic diagram of the shell structure according to an embodiment of the present utility model;

[0026] Figure 4 This is a schematic diagram of the structure in which the partition plate and activated carbon are integrally fixed in an embodiment of the present utility model.

[0027] The meanings of the reference numerals in the attached figures are as follows:

[0028] 1. Shell; 11. Mounting groove; 12. Air outlet; 13. Baffle; 14. Second positioning post; 15. Support; 16. Limiting rib; 2. Filter assembly; 21. Filter cotton; 22. Middle isolation layer; 23. Middle partition; 231. Vent hole; 232. First positioning post; 24. Activated carbon; 25. Bottom isolation layer; 3. Cover; 31. Panel; 32. Enclosure. Detailed Implementation

[0029] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0030] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0032] See Figure 1 and Figure 2 This utility model discloses a filter cartridge, which is placed in a basically vertical position during use. The filter cartridge includes: a shell 1, a filter assembly 2, and a cover 3. The shell 1 serves as a support, and the filter assembly 2 and the cover 3 are both disposed on the shell 1. It also discloses a gas protection device, including a face mask and a filter cartridge. The filter cartridge is connected to the face mask, allowing breathing of air filtered by the filter cartridge through the face mask.

[0033] See Figures 1 to 3In this embodiment, the housing 1 is provided with a mounting groove 11, an air outlet 12, and a support 15. The air outlet 12 is connected to the mounting groove 11. The mounting groove 11 opens to a first side facing laterally, and the air outlet 12 opens to a second side facing laterally. The support 15 is disposed inside the housing 1, specifically at the bottom of the mounting groove 11 and corresponding to the air outlet 12. The support 15 is used to hold the filter assembly 2 in place, preventing the filter assembly 2 from deforming towards the air outlet 12 and affecting the air output. The support 15 is circumferentially hollow, so that the air flowing through the filter assembly 2 enters the air outlet 12 through the circumferential hollow of the support 15, ensuring the air output and the normal use of the filter box. In addition, the surface of the support 15 that abuts against the filter assembly 2 is also hollow, thereby increasing the flow.

[0034] The filter assembly 2 is disposed in the mounting groove 11; the cover 3 is generally in the shape of a dome, which is laterally fitted onto the first side of the housing 1. Specifically, the cover 3 includes a panel 31 and a surrounding plate 32 connected to the panel 31. The surrounding plate 32 extends to the outer periphery of the housing 1, so that the edge of the surrounding plate 32 forms a water-blocking distance L with the opening end face of the mounting groove 11. The water-blocking distance L is preferably between 10mm and 25mm, such as 15mm. The panel 31 and the opening end of the mounting groove 11 have a first air intake gap S1, and the inner periphery of the surrounding plate 32 and the outer periphery of the housing 1 have a second air intake gap S2. External air enters the mounting groove 11 through the second air intake gap S2 and the first air intake gap S1 in sequence, and then passes through the filter assembly 2 and is discharged from the air outlet 12.

[0035] In the above scheme, during assembly, after the filter assembly 2 is installed into the mounting groove 11, the cover 3 is installed. The cover 3 covers the opening end of the mounting groove 11, forming a first air intake gap S1 between the panel 31 of the cover 3 and the opening end of the mounting groove 11. A second air intake gap S2 is formed between the surrounding plate 32 of the cover 3 and the outer periphery of the shell 1. The first air intake gap S1 and the second air intake gap S2 constitute an air intake channel. Since the second air intake gap S2 is circumferential, its air intake cross-section can be effectively increased. In use, the filter box is placed basically vertically, and the surrounding plate 32 can block rainwater. Air enters the first air intake gap S1 through the circumferential second air intake gap S2, then enters the mounting groove 11, flows through the filter assembly 2, and is then discharged from the air outlet 12 to the face mask. Thus, the filter box has a rainproof function, a large air intake cross-section, a large air intake volume, a simple structure, and low cost.

[0036] To prevent rainwater from dripping onto the enclosure 32 and flowing into the second air intake gap S2, preferably, the enclosure 32 is inclined, and the cross-sectional size of the inner cavity formed by the enclosure 32 gradually increases in the direction away from the panel 31. In this way, water droplets on the upper surface of the enclosure 32 will flow obliquely to the panel 31 and then fall to the ground from the lower surface of the enclosure 32.

[0037] To improve the overall effectiveness of rain protection and air intake, preferably, the water-blocking distance L is greater than twice the second air intake gap S2, and the second air intake gap S2 is larger than the first air intake gap S1. For example, the water-blocking distance L can be 15mm, and when the enclosure 32 is tilted, the second air intake gap S2 can be 5mm-7mm, and the first air intake gap S1 can be 4mm. The significance of controlling the relative size relationship between the water-blocking distance L and the second air intake gap S2 is to prevent rainwater from splashing into the depth of the second air intake gap S2 or even into the first air intake gap S1 when it falls on the mask. Since the second air intake gap S2 is circumferentially connected to the first air intake gap S1, while the first air intake gap S1 is transversely connected to the opening end of the mounting groove 11, the first air intake gap S1 being smaller than the second air intake gap S2 can also ensure that the air intake in the mounting groove 11 is not easily affected, and can also control the overall size of the filter box to not be too thick.

[0038] See Figure 1 and Figure 2 In this embodiment, a baffle 13 may also be provided on the outer periphery of the housing 1. Preferably, the protrusion distance of the baffle 13 is less than the second air intake gap S2, that is, in the normal state, the baffle 13 and the surrounding plate 32 maintain a gap. This is beneficial to the fact that the cover 3 will not cause obstruction when it is installed on the housing 1. The function of the baffle 13 is: when the surrounding plate 32 is squeezed and deformed, the baffle 13 is used to abut against the surrounding plate 32 to keep the second air intake gap S2 still within the controllable range and will not be completely blocked due to deformation.

[0039] Of course, the baffle 13 can also be provided on the inner circumferential side of the enclosure 32. In this case, the baffle 13 is used to abut against the shell 1. Alternatively, baffle 13 can be provided on the outer circumferential side of the shell 1 and the inner circumferential side of the enclosure 32. In this case, the baffle 13 on the shell 1 is used to abut against the enclosure 32, and the baffle 13 on the enclosure 32 is used to abut against the shell 1.

[0040] There is no limit to the number of retaining ribs 13.

[0041] See Figure 1 and Figure 2This embodiment also optimizes the filter assembly 2. Specifically, the filter assembly 2 includes filter cotton 21, middle isolation layer 22, middle partition plate 23, activated carbon 24, and bottom isolation layer 25. The middle partition plate 23 is provided with multiple air vents 231. The filter cotton 21, middle isolation layer 22, middle partition plate 23, activated carbon 24, and bottom isolation layer 25 are stacked in the mounting groove 11 from the outside to the inside. The filter cotton 21 is close to the opening end of the mounting groove 11, and the bottom isolation layer 25 is close to the air outlet 12. The middle partition plate 23 and activated carbon 24 are integrally fixed, and the activated carbon 24 is shaped and supported by the middle partition plate 23. Compared with existing technologies, this solution adds a partition plate 23 and fixes the partition plate 23 and activated carbon 24 together. Specifically, in the process of preparing activated carbon 24, the partition plate 23 can be placed in the preparation mold of activated carbon 24, and then carbon powder or carbon granules can be filled in. After compaction and bonding, activated carbon 24 of the required shape and specifications is formed. At this time, the partition plate 23 and activated carbon 24 will form an integral unit, so that activated carbon 24 can be shaped and supported by the partition plate 23. This avoids the carbon blocks from being easily damaged due to their brittleness during material transportation and assembly, ensuring that the assembled filter assembly 2 has a good filtration effect. In addition, since the partition plate 23 has a certain rigidity, it can effectively isolate the filter cotton 21 and activated carbon 24, and also provide a certain rigid support for isolating the filter cotton 21.

[0042] See Figure 1 Based on the above structure of the filter component 2, at this time, the end of the support member 15 abuts against the bottom isolation layer 25.

[0043] See Figure 1 and Figure 2 In order to improve the support effect of the bottom isolation layer 25, multiple limiting ribs 16 can be provided at the bottom of the installation groove. The multiple limiting ribs 16 are spaced apart and arranged radially with the support member 15 as the center. The limiting ribs 16 are used to abut against the bottom isolation layer 25.

[0044] On the other hand, to prevent the isolation layer from sliding, curling, or deforming, the following two solutions are proposed:

[0045] (i) Improvement of the partition plate 23: Multiple first positioning posts 232 are provided on the circumferential surface of the partition plate 23 facing the middle isolation layer 22. The first positioning posts 232 abut against the middle isolation layer 22. In this way, the middle isolation layer 22 can be opened by the first positioning posts 232.

[0046] (ii) Improve the housing 1. Multiple second positioning posts 14 are provided around the bottom of the mounting groove 11. The second positioning posts 14 abut against the bottom isolation layer 25. In this way, the bottom isolation layer 25 can be opened by using the second positioning posts 14.

[0047] Option 1 and Option 2 can be used independently or in combination.

[0048] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A filter cartridge, which is placed substantially vertically during use, characterized in that, include: The housing has a mounting groove and an air outlet, the air outlet being connected to the mounting groove, the mounting groove opening to a first side in a horizontal direction, and the air outlet opening to a second side in a horizontal direction. The filter assembly is disposed in the mounting slot; A cover is laterally fitted onto the first side of the housing. The cover includes a panel and a surrounding plate connected to the panel. The surrounding plate extends to the outer periphery of the housing, such that the edge of the surrounding plate forms a water-blocking distance L with the opening end face of the mounting groove. Furthermore, the panel and the opening end of the mounting groove maintain a first air intake gap S1, and the inner circumference of the enclosure and the outer circumference of the housing maintain a second air intake gap S2. After the external air enters the mounting groove through the second air intake gap S2 and the first air intake gap S1 in sequence, it passes through the filter assembly and is then discharged through the air outlet.

2. The filter cartridge according to claim 1, characterized in that, The water-blocking distance L is between 10mm and 25mm.

3. The filter cartridge according to claim 1, characterized in that, The water-blocking distance L is greater than twice the second air intake gap S2, and the second air intake gap S2 is greater than the first air intake gap S1.

4. The filter cartridge according to claim 1, characterized in that, The enclosure is inclined, and the cross-sectional size of the cavity surrounded by the enclosure gradually increases in the direction away from the panel.

5. The filter cartridge according to claim 1, characterized in that, The outer peripheral side of the housing and / or the inner peripheral side of the enclosure are provided with baffles. When the enclosure is compressed and deformed, the baffles are used to abut against the housing or the enclosure to keep the second air intake gap S2 within a controllable range.

6. The filter cartridge according to claim 1, characterized in that, The filter assembly includes filter cotton, a middle insulating layer, a middle partition, activated carbon, and a bottom insulating layer. The middle partition has multiple air vents. The filter cotton, middle insulating layer, middle partition, activated carbon, and bottom insulating layer are stacked sequentially from the outside to the inside in the mounting groove. The filter cotton is closer to the opening end of the mounting groove, and the bottom insulating layer is closer to the air outlet. The middle partition and activated carbon are integrally fixed, and the activated carbon is shaped and supported by the middle partition.

7. The filter cartridge according to claim 6, characterized in that, The middle partition plate has a plurality of first positioning posts arranged circumferentially on the surface of the middle isolation layer, and the first positioning posts abut against the middle isolation layer.

8. The filter cartridge according to claim 6, characterized in that, The bottom circumferential of the mounting groove is provided with a plurality of second positioning posts, which abut against the bottom isolation layer.

9. The filter cartridge according to claim 6, characterized in that, The housing is also provided with a support member inside, which is provided corresponding to the air outlet. The support member is circumferentially hollowed out, and the end of the support member abuts against the bottom isolation layer.

10. A gas protection device, characterized in that, It includes a face mask and a filter cartridge as described in any one of claims 1 to 9, wherein the filter cartridge is connected to the face mask.

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