CN111956963B - Bidirectional filtering structure and mask with same - Google Patents
Bidirectional filtering structure and mask with same Download PDFInfo
- Publication number
- CN111956963B CN111956963B CN202010807446.0A CN202010807446A CN111956963B CN 111956963 B CN111956963 B CN 111956963B CN 202010807446 A CN202010807446 A CN 202010807446A CN 111956963 B CN111956963 B CN 111956963B
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- Prior art keywords
- filter material
- converter
- guide channel
- filter
- channel
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B23/00—Filters for breathing-protection purposes
- A62B23/02—Filters for breathing-protection purposes for respirators
- A62B23/025—Filters for breathing-protection purposes for respirators the filter having substantially the shape of a mask
-
- 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
Abstract
The invention provides a bidirectional filtering structure and a mask with the same, which comprises the following components: the filter material fixture comprises a fixed base 1, a flow winding channel 2, an inner filter material fixture 3, a converter 4, an outer filter material fixture 5 and a guide channel 6. The bidirectional filtering structure can be applied to a bidirectional filtering low-resistance mask, the position of the converter 4 in the structure is changed only through the pressure difference of human breathing, and the filtering materials are arranged between the converter and the inner filtering material clamp and between the guide channel and the outer filtering material clamp, so that the purposes of bidirectional filtering and reduction of the breathing resistance are achieved.
Description
Technical Field
The invention relates to the technical field of bidirectional filtering structures, in particular to a bidirectional filtering structure and a mask with the bidirectional filtering structure.
Background
Generally, after the non-breathing valve port cover is used for a long time, the electrostatic adsorption layer is influenced by particles and water vapor, the filtration efficiency is reduced, the breathing resistance is increased, and the comfort level is difficult to ensure; most of the prior one-way valve masks do not filter the exhaled air in order to reduce the exhalation resistance, so that the safety of the prior one-way valve mask cannot be effectively guaranteed, and the risk of infection of asymptomatic infectors can exist.
Considering that the traditional bidirectional filtration is not provided with a valve port cover for long time, the existing valve port cover realizes the unidirectional filtration function, and the valve port cover of the new generation is developed towards realizing the bidirectional filtration and the ultra-thin, ultra-light, low-resistance, high-efficiency and bidirectional ultra-precise filtration in the future. The invention aims to explore a low-resistance mask structure capable of filtering in two directions.
Generally, people have requirements on protection, safety and comfort of masks used in daily life. The comfort is that the face has no oppression or the oppression is less when the mask is worn, the movement of the face and the head is not influenced when the mask is worn, and the most important point is whether the breathing is smooth or not and the mask has no suffocation feeling when the mask is worn. The existing mask can be mainly divided into two types, namely a mask with a valve and a mask without the valve. One is bidirectional filtering mask such as medical surgical mask and N95 mask without valve; it is characterized by bidirectional filtration, simple structure, large resistance and moist heat accumulation. The other is an N95 mask with a one-way valve and a plurality of similar masks with one-way valves; it is characterized by that it can make inhalation filtration, and does not make exhalation filtration, so that it can reduce hot air and water accumulation, and can make exhalation smooth. On the basis, the design for reducing the breathing resistance mainly comprises the methods of increasing the number of valves, changing the rigidity and thickness of the diaphragm, improving the structure and the like.
For the design of optimizing the bidirectional filtration, the design methods of coupling a plurality of one-way valves, increasing a transition area and the like are mainly adopted.
The patent and literature for bidirectional filtering or reducing the breathing resistance of the existing mask show that most of the existing masks for bidirectional filtering and reducing the resistance aim at haze, and the virus protection effect is greatly reduced. The investigated patents mostly use a method of coupling and using a one-way valve, and can not solve the problem of asymptomatic infectors of the existing new coronavirus.
At present, various masks are already on the market. For example, some masks using a power source as a driving device to reduce breathing resistance have a longer service time than disposable masks, some masks can effectively filter dust or viruses, and some masks can only reduce breathing resistance, and such masks have a large potential safety hazard due to the use of batteries and are expensive. Some gauze masks that do not establish the valve can realize two-way filtration, but the resistance when exhaling is great, and the unable fast discharge influences user's experience because of exhaling the steam that brings. Some gauze masks that set up the check valve can realize inspiratory effective filtration, and the resistance is less during expiration, can discharge the moisture of human exhalation fast, but can't realize the filtration of expiration, to some asymptomatic infectors under the new crown pneumonia epidemic situation, can't ensure the security. And other two-way filtration and resistance-reducing masks are mostly designed for haze, and the filtering effect on viruses is greatly reduced. The valve structure that innovates in the aspect of the structure is complicated, can't change the structural proportion and make it be applicable to on the gauze mask, and can't rely on a valve to realize two-way filtration.
Patent document CN205432236U discloses a breather valve mask, which comprises a mask body and a breather valve mounted on the mask body, and adopts a design scheme for optimizing two-way filtration, mainly a method for coupling a plurality of one-way valves, and also has the above-mentioned defects.
Patent document CN205994908U discloses a mask breather valve with a partition piece and a mask with the partition piece breather valve, which adopts a scheme of increasing a transition area, and also has the defects.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a bidirectional filtering structure and a mask with the bidirectional filtering structure.
According to an aspect of the present invention, there is provided a bidirectional filtering structure, including: the device comprises a flow winding channel 2, an inner filter material clamp 3, a converter 4, an outer filter material clamp 5 and a guide channel 6;
the guide channel 6 is connected in the bypass channel 2, the outer filter material clamp 5 is connected on the outer side of the guide channel 6, the inner filter material clamp 3 is connected on the inner side of the converter 4, and the converter 4 is arranged on the inner side of the guide channel 6 and can axially move in the guide channel 6;
the side wall of the guide channel 6 is provided with a gas inlet and a gas outlet;
in the air suction state, the converter 4 moves to the inner end of the guide channel 6 under the action of air pressure difference, and outside air sequentially passes through the bypass channel 2, the air inlet and outlet, the filter material on the outer filter material clamp 5 and the filter material on the inner filter material clamp 3 to enter the inner side;
in an expiration state, the converter 4 moves to the outer end of the guide channel 6 under the action of air pressure difference, and the inner side gas is discharged to the outer side through the filter material on the inner filter material clamp 3, the gas inlet and outlet and the bypass channel 2 in sequence.
Preferably, the device also comprises a fixed base 1, wherein the fixed base 1 and the streaming channel 2 are mutually connected and fixed on two sides of a fixed object.
Preferably, the converter 4 has a first axial extension 41, the inner filter holder 3 is connected to the axial extension 41, the guide channel 6 has a second axial extension 61, and the outer filter holder 5 is connected to the second axial extension 61.
Preferably, the bypass passage 2 is provided with a positioning hole 21, and the guide passage 6 is connected to the positioning hole 21.
Preferably, the number of the positioning holes 21 is from 3 to 20.
Preferably, the filter material is in a ring-shaped or arc-shaped sheet structure.
Preferably, the converter 4 is made of soft material, so that noise generated when the converter 4 moves is reduced.
Preferably, the fixing base 1 is made of soft material, so that the comfort level of the fixing base 1 contacting with the skin is increased.
Preferably, the components are made of light materials, and the weight of the bidirectional filtering structure is reduced.
According to another aspect of the present invention, there is provided a mask with a bidirectional filtering structure, comprising the bidirectional filtering structure described in any one of the above.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, by designing a simple bidirectional filtering and low-resistance structure, the change of the structural state is realized only by the driving of the respiratory pressure difference of a human body without an external device, the respiratory bidirectional filtering is realized, the lower respiratory resistance is ensured, and the cost is lower;
2. the filtering layer number conversion structure aiming at different breathing states is provided, the difference between external virus inhalation and human virus exhalation is fully considered, 1-2 filtering layers are respectively arranged in a targeted manner, the filtering efficiency is ensured, and the resistance of exhalation is reduced.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a right exploded view of the mechanical structure of the present invention;
FIG. 2 is a top exploded view of the mechanical structure of the present invention;
FIG. 3 is a sectional view of the structure during inhalation;
fig. 4 is a sectional view showing the structure of exhalation.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
According to the present invention, there is provided a bidirectional filter structure comprising: the filter material device comprises a flow surrounding channel 2, an inner filter material clamp 3, a converter 4, an outer filter material clamp 5 and a guide channel 6.
The guide channel 6 is connected in the bypass channel 2, the outer filter material clamp 5 is connected on the outer side of the guide channel 6, the inner filter material clamp 3 is connected on the inner side of the converter 4, and the converter 4 is arranged on the inner side of the guide channel 6 and can axially move in the guide channel 6. The side wall of the guide channel 6 is provided with a gas inlet and outlet.
In the air suction state, the converter 4 moves to the inner end of the guide channel 6 under the action of air pressure difference, and outside air sequentially passes through the bypass channel 2, the air inlet and outlet, the filter material on the outer filter material clamp 5 and the filter material on the inner filter material clamp 3 to enter the inner side;
in an expiration state, the converter 4 moves to the outer end of the guide channel 6 under the action of air pressure difference, and the inner side gas is discharged to the outer side through the filter material on the inner filter material clamp 3, the gas inlet and outlet and the bypass channel 2 in sequence.
The converter 4 has a first axial extension 41, the inner filter holder 3 is connected to the axial extension 41, the guide channel 6 has a second axial extension 61, and the outer filter holder 5 is connected to the second axial extension 61.
The flow-around channel 2 is provided with a positioning hole 21, and the guide channel 6 is connected to the positioning hole 21. The number of the positioning holes 21 is 5, so that the connecting part can be effectively fixed.
The filter material is annular, adopts the lamellar structure, can be very convenient install on filter material anchor clamps. The converter 4 is made of soft rubber materials, and noise generated when the converter 4 moves is reduced. Each part adopts light plastics as the preparation raw materials, reduces two-way filtration weight.
One specific embodiment of the present invention is a bidirectional filtering structure, which comprises:
the filter material fixture comprises a fixed base 1, a flow winding channel 2, an inner filter material fixture 3, a converter 4, an outer filter material fixture 5 and a guide channel 6.
As shown in fig. 1 and 2, the bypass passage 2 is connected to the fixed base through the positioning hole 21, and the guide passage 6 is connected to the bypass passage 2 through the positioning hole 21, thereby fixing the stroke of the converter 4. The converter 4 is limited by the bypass channel 2 and the guide channel 6, and only axial reciprocating motion can be realized. The outer side stepped structure 61 of the guide channel 6 is connected with the outer filter material clamp 5 to fix the outer filter material; the stepped structure 61 inside the guide channel 6 has a limiting effect on the guide channel 6. The inner side of the converter 4 is connected with the inner filter material clamp 3 to fix the inner filter material.
The converter 4 effects a reciprocating movement under a pressure difference. When the outside pressure is greater than the inside pressure, the pressure difference drives the converter 4 to move towards the fixed base 1, so that the two filter material clamp areas are overlapped, and double filtration is realized. When the outside pressure is smaller than the inside pressure, the pressure difference drives the converter 4 to move towards the side far away from the fixed base 1, the inner filter material clamp 3 leaves the gas channel, and the gas passing resistance is reduced.
The mask with the bidirectional filtering structure provided by the invention comprises any one bidirectional filtering structure. One specific embodiment is a mask with a bidirectional filtering structure, which comprises:
As shown in fig. 1 and 2, the fixing base 1 is installed inside the mask, the bypass passage 2 is installed outside the mask, the fixing base and the bypass passage are fixedly connected through the positioning hole 21, the guide passage 6 is connected with the bypass passage 2 through the positioning hole 21, and the stroke of the converter 4 is fixed. The converter 4 is limited by the bypass channel 2 and the guide channel 6, and only axial reciprocating motion can be realized. The outer side stepped structure 61 of the guide channel 6 is connected with the outer filter material clamp 5 to fix the outer filter material; the stepped structure 61 inside the guide channel 6 has a limiting effect on the guide channel 6. The inner side of the converter 4 is connected with the inner filter material clamp 3 to fix the inner filter material.
The transducer 4 effects a reciprocating motion under the natural breathing pressure difference. When the structure is sucked, as shown in fig. 3, the outside pressure is greater than the inside pressure, and the pressure difference drives the converter 4 to move towards the fixed base 1, so that the two filter material clamp areas are overlapped, double filtration is realized, and external virus infection is effectively protected. The structure is as shown in fig. 4 when exhaling, outside pressure is less than inside pressure, and differential pressure drive converter 4 moves to one side far away from fixed base 1, and interior filter material anchor clamps 3 leave the gas passage, reduces expiration resistance.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. A bi-directional filtration structure, comprising: the device comprises a flow winding channel (2), an inner filter material clamp (3), a converter (4), an outer filter material clamp (5) and a guide channel (6);
the guide channel (6) is connected in the flow winding channel (2), the outer filter material clamp (5) is connected on the outer side of the guide channel (6), the inner filter material clamp (3) is connected on the inner side of the converter (4), and the converter (4) is arranged on the inner side of the guide channel (6) and can move axially in the guide channel (6);
the outer side of the guide channel (6) is connected with the outer filter material clamp (5) to fix the outer filter material, and the inner side of the converter (4) is connected with the inner filter material clamp (3) to fix the inner filter material;
the side wall of the guide channel (6) is provided with a gas inlet and a gas outlet;
in the air suction state, the converter (4) moves to the inner end of the guide channel (6) under the action of air pressure difference, and outside air sequentially passes through the bypass channel (2), the air inlet and outlet, the filter material on the outer filter material clamp (5) and the filter material on the inner filter material clamp (3) to enter the inner side;
under the expiration state, converter (4) move under the effect of atmospheric pressure difference to the outer end of direction passageway (6), interior filter media anchor clamps (3) leave the gas passage, and inboard gas loops through filter media on outer filter media anchor clamps (5), gas exit with around flow channel (2) discharge to the outside.
2. A bi-directional filter structure according to claim 1, further comprising a fixing base (1), wherein the fixing base (1) and the circumfluence channel (2) are connected with each other and fixed on both sides of a fixed object.
3. A bi-directional filter structure according to claim 1, characterized in that the converter (4) has a first axial extension (41), the inner filter clamp (3) being connected to the axial extension (41), the guide channel (6) having a stepped structure (61), the outer filter clamp (5) being connected to the stepped structure (61).
4. The bidirectional filter structure according to claim 1, wherein the bypass passage (2) is provided with a positioning hole (21), and the guide passage (6) is connected to the positioning hole (21).
5. The bidirectional filtering structure of claim 4, wherein the number of positioning holes (21) is from 3 to 20.
6. The bi-directional filter structure of claim 1, wherein the filter is in the form of a ring or curved sheet.
7. Bidirectional filtering structure according to claim 1, characterized in that the converter (4) is made of a soft material.
8. The bidirectional filtering structure of claim 2, characterized in that the fixed base (1) is made of a soft material.
9. A bi-directional filtration structure according to claim 2, wherein said components are of lightweight material.
10. A mask with a bi-directional filtering structure, comprising the bi-directional filtering structure of any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010807446.0A CN111956963B (en) | 2020-08-12 | 2020-08-12 | Bidirectional filtering structure and mask with same |
| PCT/CN2021/090630 WO2022033078A1 (en) | 2020-08-12 | 2021-04-28 | Bidirectional filtering structure, and face mask having bidirectional filtering structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010807446.0A CN111956963B (en) | 2020-08-12 | 2020-08-12 | Bidirectional filtering structure and mask with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111956963A CN111956963A (en) | 2020-11-20 |
| CN111956963B true CN111956963B (en) | 2021-06-01 |
Family
ID=73365355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010807446.0A Active CN111956963B (en) | 2020-08-12 | 2020-08-12 | Bidirectional filtering structure and mask with same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111956963B (en) |
| WO (1) | WO2022033078A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111956963B (en) * | 2020-08-12 | 2021-06-01 | 上海交通大学 | Bidirectional filtering structure and mask with same |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1234736A (en) * | 1983-11-25 | 1988-04-05 | The Boc Group, Inc. | Exhalation valve |
| US5325892A (en) * | 1992-05-29 | 1994-07-05 | Minnesota Mining And Manufacturing Company | Unidirectional fluid valve |
| CN1840213A (en) * | 2005-08-26 | 2006-10-04 | 王海金 | Multifunctional face mask with unilateral valve |
| CN203943114U (en) * | 2014-04-03 | 2014-11-19 | 葆旭东 | Mouth mask |
| CN205432236U (en) * | 2016-02-24 | 2016-08-10 | 冯松瑞 | Breather valve gauze mask |
| CN205994908U (en) * | 2016-06-08 | 2017-03-08 | 姚爱军 | A kind of mask breather valve and breather valve mask |
| CN210542940U (en) * | 2019-08-05 | 2020-05-19 | 刘向文 | Breather valve |
| CN111227381A (en) * | 2020-03-26 | 2020-06-05 | 深圳国技仪器有限公司 | Mask device with bidirectional filtering and high-temperature disinfection functions for air inlet and outlet |
| CN111956963B (en) * | 2020-08-12 | 2021-06-01 | 上海交通大学 | Bidirectional filtering structure and mask with same |
-
2020
- 2020-08-12 CN CN202010807446.0A patent/CN111956963B/en active Active
-
2021
- 2021-04-28 WO PCT/CN2021/090630 patent/WO2022033078A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN111956963A (en) | 2020-11-20 |
| WO2022033078A1 (en) | 2022-02-17 |
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