CN107319654B - Reverse filtering mask and self-cleaning method - Google Patents
Reverse filtering mask and self-cleaning method Download PDFInfo
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- CN107319654B CN107319654B CN201710712506.9A CN201710712506A CN107319654B CN 107319654 B CN107319654 B CN 107319654B CN 201710712506 A CN201710712506 A CN 201710712506A CN 107319654 B CN107319654 B CN 107319654B
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- mask
- filter screen
- metal filter
- base body
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
- A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B7/00—Respiratory apparatus
- A62B7/10—Respiratory apparatus with filter elements
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B9/00—Component parts for respiratory or breathing apparatus
- A62B9/02—Valves
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B9/00—Component parts for respiratory or breathing apparatus
- A62B9/06—Mouthpieces; Nose-clips
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- Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physical Education & Sports Medicine (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The invention relates to a reverse filtering mask and a self-cleaning method, comprising a mask substrate and binding belts connected to two ends of the mask substrate for fixing; the mask matrix at least covers the mouth and nose area of the user, and an annular plastic nose strip is connected along the edge of the cavity shape of the mask matrix; the mask substrate is provided with a breather valve; a metal filter screen and a plurality of protective filter layers are arranged below the mask substrate; a plurality of longitudinal diversion trenches are arranged on the inner wall of the mask substrate cavity, and the lower ends of the longitudinal diversion trenches are converged into the diversion trenches; the drainage groove is communicated with the metal filter screen, and a hydrophilic polymer film is arranged at the joint. The particle dust filtered by the invention is easy to drop, the mask is not wet and ponding, the mask has a self-cleaning function, each component is convenient to clean or replace, the wearing is comfortable, and the protection effect is good.
Description
Technical Field
The invention belongs to the technical field of respiratory protection devices and respiratory masks, and particularly relates to a reverse filtering mask and a self-cleaning method.
Background
Along with the aggravation of environmental pollution, the air quality is worse and worse, the haze weather also appears frequently, and seriously influences the healthy of people, and people attach higher and higher attention to the healthy, and the most direct mode that people adopted is to wear the gauze mask to the condition that current air quality is bad. The mask is designed for protecting the health of people, is used for filtering visible or invisible substances harmful to human bodies, and has very good action and effect when being worn in environments polluted by bad air quality, respiratory tract infectious disease flowing, dust and the like. So the mask has higher and higher frequency of use in daily work and life of people.
The mask can be generally divided into an air filtering type mask and an air supply type mask, wherein the air filtering type mask is the most widely used type in daily work of people, and the working principle is that air containing harmful substances is filtered and purified by a filter material of the mask and then inhaled by the human body, but the mask used daily for people has a plurality of defects: when a user wears the mask, the mask main body is basically formed by the protective filter layer, so that the mask is easy to be stained when particle dust is filtered, and the mask is required to be cleaned integrally or can be used only once; the area of the protective filter layer of the mask main body is large, and the manufacturing cost is high; the mask is contacted with the mouth and nose of a user, so that the mask is easy to be sultry and wet, the mask is designed into a cavity structure, the condensation of the gas exhaled by the user is easy to wet and accumulate water in the cavity, and a filter layer is arranged right in front of the mouth of the cavity of the mask, so that the structure is unfavorable for the falling of filtered particle dust; the laminating sealed effect of gauze mask border and user's face is not good, has reduced the protection effect.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a reverse filtering mask and a self-cleaning method, so as to solve the problems that the particle dust filtered by the mask is not easy to fall off, water is easy to accumulate in the mask, and the mask is required to be cleaned frequently or can only be used once after the particle dust filtered by the mask is dirty.
In order to solve the technical problems, the invention adopts the following technical scheme:
the reverse filtering mask comprises a mask base body and binding belts connected to two ends of the mask base body for fixing, wherein the mask base body is made of airtight materials, is in a shell shape and is provided with an opening part for covering the mouth and nose area of a human face, and when the mask base body is attached to the human face through the opening part and covers the mouth and nose, a space cavity is formed between the inner wall of the mask base body and the skin of the human face;
the opening part of the mask base body is connected with an annular plastic nose strip corresponding to the edge shape of the opening part and used for being reliably attached to the facial skin of a user; a breather valve is arranged above the middle part of the mask matrix in the wearing state, the breather valve is communicated with the inside and the outside of the mask matrix and is used for unidirectional outflow of gas in the mask matrix from the breather valve, and an opening and closing device is arranged on the breather valve so as to correspondingly control the unidirectional outflow of gas in the mask matrix from the breather valve; a metal filter screen is horizontally arranged below the mouth part of the mask base body in a wearing state, and is communicated with the inside and the outside of the mask base body and used for circulating gas inside and outside the mask base body; a protective filter layer is arranged on the mask substrate and positioned on the inner side of the metal filter screen, and a space is reserved between the metal filter screen and the protective filter layer; the mask comprises a mask body, wherein the inner wall of the mask body is provided with a plurality of longitudinal diversion trenches, the longitudinal diversion trenches are used for diversion of condensed water after the user exhales gas and is condensed on the inner wall of the mask body, and the lower ends of the longitudinal diversion trenches are converged into the diversion trenches; the tail end of the drainage groove is communicated with the metal filter screen through the hydrophilic polymer film; the hydrophilic polymer film completely covers the communication part of the drainage groove and the metal filter screen; the hydrophilic polymer film has a water permeability greater than a gas permeability.
The technical scheme is further perfected, and the metal filter screen is detachably connected with the mask base body.
Further, the shape of the protective filter layer is corresponding to the shape of the metal filter screen, the annular gasket corresponding to the shape of the metal filter screen is clamped between the metal filter screen and the mask base body, and the thickness of the annular gasket is the size of the interval between the metal filter screen and the protective filter layer.
Further, the mask base body is of a symmetrical structure along the longitudinal center line; the main material of the mask matrix is an airtight polyurethane material; the mask base body is formed by die casting.
Further, the main material of the plastic nose strip is hydrogel.
Further, the binding band is detachably connected to the outer wall of the mask base body.
Further, the protection filter layer is three layers, and the dust-proof layer, the antibacterial layer and the filter layer are sewn together, wherein the dust-proof layer, the antibacterial layer and the filter layer are sequentially arranged from outside to inside and are used for filtering dust with the particle size of more than 10 microns, and the filter layer is used for filtering dust with the particle size of more than 2.5 microns.
The invention also relates to a self-cleaning method based on the reverse filtering mask, which comprises the steps of using the reverse filtering mask in normal wear, condensing gas exhaled by a user on the inner wall of a mask matrix to form condensed water, guiding the condensed water to flow downwards through a plurality of longitudinal guide grooves arranged on the inner wall of the mask matrix, converging and flowing through the guide grooves, passing through a hydrophilic polymer film, guiding the condensed water to a metal filter screen, and cleaning the filter matters on the metal filter screen and dripping the condensed water through the capillary action of the metal filter screen grid.
Further perfecting the method, and falling the condensed water and the filtered matters on the metal filter screen under the action of vibration and respiratory airflow generated by the activities of the user.
Further, the breathing valve is closed to open and close the opening and closing device on the breathing valve, so that gas in the mask matrix can only flow out of the metal filter screen, and condensed water and filter materials on the metal filter screen fall under the action of expiratory airflow of a user.
Compared with the prior art, the invention has the following beneficial effects:
1. because the metal filter screen is horizontally arranged below the mask base body, the filtered particle dust and the like are easy to automatically fall under the action of vibration and respiratory airflow generated by walking, and the cleaning of the metal filter screen is effectively kept; this is also the source of the "reverse" in the reverse filter mask of the present invention;
2. the longitudinal diversion trenches and the diversion trenches arranged in the mask base body effectively guide out condensed water of gas exhaled by a user to the metal filter screen, and the condensed water automatically washes the metal filter screen and drips down through the capillary action of the metal filter screen grid, so that the metal filter screen is further kept clean, frequent washing is not needed, and the problem of wet ponding in the mask base body is also avoided; the wearing comfort is better;
3. after the metal filter screen is disassembled, the protective filter layer can be taken out, so that the cleaning or the changing is convenient; the area of the protective filter layer is equivalent to that of the metal filter screen, and compared with the area of the protective filter layer of the traditional mask, the protective filter layer is small in area, convenient to clean and low in modification cost;
4. the plasticity nose strip has good softness and memory, is comfortable for users to wear, has good effect of attaching and sealing with the facial skin of the users, effectively prevents air from entering from the gap between the mask and the face, and improves the protection effect;
5. the binding belt can be independently disassembled and washed, and is convenient to clean or change.
Drawings
FIG. 1 is a schematic diagram of a specific embodiment of the present invention;
fig. 2-a front view of a mask base in accordance with an embodiment of the present invention;
FIG. 3-a partial cross-sectional view of FIG. 2;
wherein, 1-gauze mask base member, 2-breather valve, 3-bandage, 4-plasticity nose strip, 5-metal filter screen, 6-vertical guiding gutter, 7-protection filter layer, 8-ring gasket, 9-hydrophilic polymer membrane, 10-guiding gutter.
Description of the embodiments
The following describes the embodiments of the present invention in further detail with reference to the drawings.
Referring to fig. 1, the reverse filtering mask comprises a mask base body 1 and binding bands 3 which are connected to two ends of the mask base body 1 and used for fixing, wherein the mask base body 1 at least covers the mouth and nose area of a user, the mask base body 1 is in a cavity shape with the inner part spaced from the mouth and nose of the user and the outer part protruding towards the direction away from the mouth and nose of the user; an annular plastic nose strip 4 corresponding to the shape of the cavity edge is connected along the edge of the cavity shape of the mask base body 1 and is used for being attached to the facial skin of a user; the plastic nose strip 4 is mainly made of hydrogel, has good softness and memory, is comfortable to wear by a user, and has good sealing effect when being attached to the facial skin of the user.
Referring to fig. 1, a breather valve 2 is arranged above the middle of the mask body 1 in the wearing state, the breather valve 2 is clamped in a corresponding assembly hole on the mask body 1 through a sealing ring, the breather valve 2 is communicated with the inside and the outside of the mask body 1 and is used for unidirectional outflow of gas in the mask body 1 from the breather valve 2, namely, the breather valve 2 can only give out gas and can not give air inlet, and an opening and closing device is arranged on the breather valve 2 to correspondingly control the unidirectional outflow of gas in the mask body 1 from the breather valve 2.
Referring to fig. 1 to 3, a metal filter screen 5 is horizontally arranged below the mask base 1, and the metal filter screen 5 is communicated with the inside and the outside of the mask base 1 and is used for circulating gas inside and outside the mask base 1; a protective filter layer 7 is arranged on the mask base body 1 and positioned on the inner side of the metal filter screen 5; the shape of the protective filter layer 7 is corresponding to the shape of the metal filter screen 5, and the protective filter layer is clamped between the metal filter screen 5 and the mask base body 1 through an annular gasket 8 with the shape corresponding to the shape of the metal filter screen 5; the metal filter screen 5 is clamped and embedded in an assembly groove corresponding to the shape of the metal filter screen 5 below the mask base body 1 in an interference manner, an inward annular bulge is arranged at one end of the assembly groove flush with the inner wall of the mask base body 1, and the metal filter screen 5 tightly presses and fixes the protective filter layer 7 between the metal filter screen 5 and the annular bulge of the assembly groove of the mask base body 1 through the annular gasket 8.
The protective filter layer 7 is actually designed into three layers, namely a dust-proof layer for filtering dust with the particle size of more than 10 microns, an adsorption antibacterial layer for moisture absorption and sterilization and a filter layer for filtering dust with the particle size of more than 2.5 microns are sequentially arranged from outside to inside, the dust-proof layer, the antibacterial layer and the filter layer are sewed together, and the shape is cut into the same shape as the shape of the metal filter screen 5; when cleaning or replacement is needed, through the elastic deformation of the mask matrix 1, the metal filter screen 5 is taken out, the annular gasket 8 and the protective filter layer 7 are taken out, the area of the protective filter layer 7 is smaller than that of a traditional mask, the cleaning is convenient, and the modification cost is low.
Referring to fig. 2 and 3, the inner wall of the cavity of the mask body 1 is provided with a plurality of longitudinal diversion trenches 6 for diversion of condensed water after the user exhales gas and condenses on the inner wall of the cavity of the mask body 1, and the lower ends of the longitudinal diversion trenches 6 are converged into a diversion trench 10; the tail end of the drainage groove 10 is communicated with the metal filter screen 5; the hydrophilic polymer film 9 is arranged at the communication part of the drainage groove 10 and the metal filter screen 5, the hydrophilic polymer film 9 completely covers the communication part of the drainage groove 10 and the metal filter screen 5, the water permeability of the hydrophilic polymer film 9 is stronger than the air permeability, and the air is prevented from being inhaled by people through the drainage groove 10 to reduce the protection effect; the vertical guiding gutter 6 and the guiding gutter 10 that set up in the gauze mask base member 1 effectively export the comdenstion water of user's exhale to metal filter screen 5, because metal filter screen 5's net is very little, through the capillary action of metal filter screen 5 net, condensation hydroenergy self-cleaning metal filter screen 5 and whereabouts, kept metal filter screen 5's cleanness, need not frequent washing, also avoided the interior moist ponding problem of gauze mask base member 1. The drainage groove 10 in this structure only communicates with the metal filter screen 5 and is not connected to the protection filter layer 7, can avoid the cotton protection filter layer 7 to lead to filtering the granule that leaves, dust to adhere and be difficult for droing the jam problem that brings because of contacting the comdenstion water, has guaranteed the effectual filter effect of protection filter layer 7 promptly, has improved the self-cleaning function of metal filter screen 5 again.
The mask base body 1 is of a symmetrical structure along the longitudinal center line, so that the design cost of a die casting die of the mask base body 1 can be reduced; the main material of the mask matrix 1 is air-proof polyurethane or nylon material; the mask base body 1 is formed by die casting, and is suitable for mass production.
Referring to fig. 1, the binding band 3 is detachably connected to the outer wall of the cavity of the mask base body 1 through a snap fastener, so that the mask base body is convenient to clean or replace.
The self-cleaning method of the reverse filter mask based on the reverse filter mask comprises the steps of normally wearing the reverse filter mask, wherein gas exhaled by a user forms condensed water after being condensed on the inner wall of the mask substrate 1, the condensed water flows downwards through a plurality of longitudinal diversion trenches 6 arranged on the inner wall of the mask substrate 1, and flows in a converging way through the diversion trenches 10, passes through the hydrophilic polymer film 9, is guided out to the metal filter screen 5, and the condensed water washes filter matters on the metal filter screen 5 and drops through the capillary action of the meshes of the metal filter screen 5.
Wherein, the condensed water and the filter matters on the metal filter screen 5 fall off under the action of vibration and respiratory airflow generated by the activities of the user.
In addition to the above unintentional cleaning, particularly, the intentional cleaning may be performed, that is, the opening and closing device on the breather valve 2 is specially closed so that the gas in the mask base 1 can only flow out through the protective filter layer 7 and the metal filter screen 5, at this time, the user exhales strongly, and the condensed water and the filter material on the metal filter screen 5 are blown off under the action of the exhaled air flow.
When the mask is implemented, three inward bulges can be arranged at the assembling groove part of the metal filter screen 5 on the mask base body 1, and the metal filter screen 5 is installed and clamped in the assembling groove through elastic deformation; in the implementation process, four lugs can be further arranged on the periphery of the metal filter screen 5, and are connected to the mask base body 1 through threads, so that the metal filter screen 5 is installed and fixed in the assembly groove; in the implementation, further, an active adsorption substance may be provided in the drainage groove 10 instead of the hydrophilic polymer film 9, and the structure may be: the tail end of the drainage groove 10 is communicated with the metal filter screen 5, and active adsorption substances are arranged in the drainage groove 10; the active adsorption material can filter and purify the air inhaled by the person through the drainage groove 10 to avoid reducing the protection effect, so the active adsorption material is more commonly used and has low cost. Further improvements in the above embodiments should be considered within the scope of the invention.
Finally, it should be noted that the above-mentioned embodiments of the present invention are merely examples for illustrating the present invention, but the present invention is not limited to the above-mentioned embodiments, which are merely illustrative, not restrictive. Although the present invention has been described in detail with reference to preferred embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention.
Claims (8)
1. The reverse filtration mask comprises a mask base body and binding bands connected to two ends of the mask base body for fixing, wherein the mask base body is made of airtight materials, and is characterized in that: the mask body is in a shell shape and is provided with an opening part for wrapping the mouth and nose area of a human face, and when the mask body is attached to the human face through the opening part and covers the mouth and nose, a space cavity is formed between the inner wall of the mask body and the skin of the human face;
the opening part of the mask base body is connected with an annular plastic nose strip corresponding to the edge shape of the opening part and used for being reliably attached to the facial skin of a user; a breather valve is arranged above the middle part of the mask matrix in the wearing state, the breather valve is communicated with the inside and the outside of the mask matrix and is used for unidirectional outflow of gas in the mask matrix from the breather valve, and an opening and closing device is arranged on the breather valve so as to correspondingly control the unidirectional outflow of gas in the mask matrix from the breather valve; a metal filter screen is horizontally arranged below the mouth part of the mask base body in a wearing state, and is communicated with the inside and the outside of the mask base body and used for circulating gas inside and outside the mask base body; a protective filter layer is arranged on the mask substrate and positioned on the inner side of the metal filter screen, and a space is reserved between the metal filter screen and the protective filter layer; the mask comprises a mask body, wherein the inner wall of the mask body is provided with a plurality of longitudinal diversion trenches, the longitudinal diversion trenches are used for diversion of condensed water after the user exhales gas and is condensed on the inner wall of the mask body, and the lower ends of the longitudinal diversion trenches are converged into the diversion trenches; the tail end of the drainage groove is communicated with the metal filter screen through the hydrophilic polymer film; the hydrophilic polymer film completely covers the communication part of the drainage groove and the metal filter screen; the hydrophilic polymer film has a water permeability greater than air permeability;
the shape of the protective filter layer is corresponding to the shape of the metal filter screen, and the protective filter layer is clamped between the metal filter screen and the mask base body through an annular gasket with the shape corresponding to the shape of the metal filter screen, wherein the thickness of the annular gasket is the size of the interval between the metal filter screen and the protective filter layer;
the metal filter screen is detachably connected with the mask base body.
2. A reverse filtration mask according to claim 1, wherein: the mask base body is of a structure symmetrical along the longitudinal center line; the main material of the mask matrix is an airtight polyurethane material; the mask base body is formed by die casting.
3. A reverse filtration mask according to claim 1, wherein: the main material of the plastic nose strip is hydrogel.
4. A reverse filtration mask according to claim 1, wherein: the binding band is detachably connected to the outer wall of the mask base body.
5. A reverse filtration mask according to claim 1, wherein: the protective filter layer is three layers, and the protective filter layer is sequentially provided with a dust-proof layer for filtering dust with the particle size of more than 10 microns, an antibacterial layer for absorbing moisture and sterilizing, and a filter layer for filtering dust with the particle size of more than 2.5 microns from outside to inside, wherein the dust-proof layer, the antibacterial layer and the filter layer are sewed together.
6. The self-cleaning method of the reverse filtration mask is characterized by comprising the following steps of: the method is based on the reverse filtration mask of any one of claims 1-5; the reverse filtering mask is used by being worn normally, gas exhaled by a user forms condensed water after being condensed on the inner wall of a mask substrate, the condensed water flows downwards through a plurality of longitudinal diversion trenches arranged on the inner wall of the mask substrate, the condensed water is converged and flows through the diversion trenches, passes through a hydrophilic polymer film, is guided out to a metal filter screen, and the condensed water washes filter matters on the metal filter screen and drops through capillary action of a metal filter screen grid.
7. The method of self-cleaning a reverse filter mask of claim 6, wherein: and the condensed water and the filter matters on the metal filter screen fall off under the action of vibration and respiratory airflow generated by the activities of the user.
8. The method of self-cleaning a reverse filter mask of claim 6, wherein: the breathing valve is arranged on the metal filter screen, and the opening and closing device on the breathing valve is closed to enable gas in the mask substrate to flow out of the metal filter screen only, so that condensed water and filter materials on the metal filter screen fall under the action of expiratory airflow of a user.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710712506.9A CN107319654B (en) | 2017-08-18 | 2017-08-18 | Reverse filtering mask and self-cleaning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710712506.9A CN107319654B (en) | 2017-08-18 | 2017-08-18 | Reverse filtering mask and self-cleaning method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107319654A CN107319654A (en) | 2017-11-07 |
| CN107319654B true CN107319654B (en) | 2023-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710712506.9A Active CN107319654B (en) | 2017-08-18 | 2017-08-18 | Reverse filtering mask and self-cleaning method |
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| CN (1) | CN107319654B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110193151B (en) * | 2019-04-15 | 2021-01-22 | 腾飞科技股份有限公司 | Industrial dust mask |
| CN113018715B (en) * | 2021-04-03 | 2022-07-12 | 粤卫协(广东)环境科技有限公司 | High-efficient environmental protection portable air purification device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190921119A (en) * | 1909-09-15 | 1910-06-16 | Jacob Kindermann | Improvements in Respirators. |
| CN103202552A (en) * | 2013-02-22 | 2013-07-17 | 王艳 | Mask having special protection function for respiratory system |
| CN203676200U (en) * | 2013-11-19 | 2014-07-02 | 吕文松 | Dustproof mask with function of automatically purifying air |
| CN203851847U (en) * | 2014-02-11 | 2014-10-01 | 西安工程大学 | Haze preventing respirator using evaporative cooling technology for purifying air |
| CN105167254A (en) * | 2015-11-04 | 2015-12-23 | 常胜 | Electrostatic anti-haze mouth mask |
| CN106039605B (en) * | 2016-05-31 | 2019-08-02 | 中科贝思达（厦门）环保科技股份有限公司 | A kind of double valve mask |
| CN207040977U (en) * | 2017-08-18 | 2018-02-27 | 重庆大学 | A kind of reverse filtration mouth mask |
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2017
- 2017-08-18 CN CN201710712506.9A patent/CN107319654B/en active Active
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| CN107319654A (en) | 2017-11-07 |
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