CN111494819A

CN111494819A - Switchable mask with double valves

Info

Publication number: CN111494819A
Application number: CN202010322890.3A
Authority: CN
Inventors: 黄一泓; 丁明明
Original assignee: Hangzhou Xiangwai Environmental Protection Science & Technology Co ltd
Current assignee: Hangzhou Xiangwai Environmental Protection Science & Technology Co ltd
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2020-08-07
Anticipated expiration: 2040-04-22
Also published as: CN111494819B

Abstract

The invention discloses a switchable mask with double valves, which comprises an outer surface body and one-way valves embedded on the outer surface body, wherein each one-way valve comprises a first valve and a second valve which are arranged along the extension direction of the outer surface body, a turnover piece is arranged between the first valve and the second valve, and the turnover piece is turned over in the process of absorbing moisture and can just cover the inlet of one-way valve when being turned over to one limit. The design idea of the invention is to arrange two one-way valves based on redundancy, arrange a turnover part capable of converting air flow between the two one-way valves, convert the turnover part according to the moisture content in the space, and close the valve in operation when a certain moisture density is reached, so that the second valve starts to operate, thus prolonging the service life of the mask.

Description

Switchable mask with double valves

Technical Field

The invention relates to the technical field of masks, in particular to a switchable mask with double valves.

Background

The existing mask with the breather valve is a common mask type, and provides smooth feeling of exhaled air for a user while keeping the filtering effect of the inhaled air.

However, there is a drawback that when a person breathes, particularly, exhaled air, contains a large amount of moisture, which may adhere to the breather valve to generate small water drops, so that the breather valve cannot achieve a good sealing effect when breathing in air, thereby causing the failure of the mask. The small water drops stay on the breather valve, which is generally caused by that more particles (such as respiratory tract particles like spittle) stay at the valve port position of the breather valve due to long-time work of the breather valve.

Disclosure of Invention

The invention aims to provide a switchable mask with double valves. The design idea of the invention is that two independent valves are arranged and can be switched to work,

the technical scheme of the invention is as follows: a switchable mask with double valves comprises an outer surface body and a one-way valve embedded on the outer surface body, wherein the one-way valve comprises a first valve and a second valve which are arranged along the extension direction of the outer surface body, a turnover piece is arranged between the first valve and the second valve,

the turnover piece is turned over in the process of absorbing moisture, and the turnover piece just can cover the inlet of a one-way valve when being turned over to one limit.

In the switchable mask with two valves, the upper part of the outer body is provided with a revolving part partially extending outwards, and a particle capture cavity is formed inside the revolving part.

In the switchable mask with the double valves, the switchable mask further comprises a flow guide surface positioned on the inner side of the outer surface body, and a flow field is formed between the flow guide surface and the outer surface body to enable exhaled air to flow to the one-way valve.

In the switchable mask with two valves, the flip piece is horizontally disposed in the initial state, and the main body of the flip piece has a concave portion facing the first valve.

In the switchable mask with two valves, the flip-over member is made of a flexible material and has a sheet structure, and at least one of the two end surfaces of the flip-over member is provided with a water-swellable fiber material layer, and if the two end surfaces are both provided with the water-swellable fiber material layer, the density of the material layer on one end surface must be less than that of the material layer on the other end surface.

In the switchable mask with double valves, the fiber material layer is made of wood fiber.

The invention has the advantages that: the design idea of the invention is to arrange two one-way valves based on redundancy, arrange a turnover part capable of converting air flow between the two one-way valves, convert the turnover part according to the moisture content in the space, and close the valve in operation when a certain moisture density is reached, so that the second valve starts to operate, thus prolonging the service life of the mask.

Drawings

FIG. 1 is a general schematic of the present invention;

FIG. 2 is a schematic diagram of another state in an embodiment of the present invention.

In the figure: 1-an exohedron; 12-a particle capture chamber; 2-a flow guide surface; 3-a first valve; 4-a second valve; 5-turnover part

Detailed Description

The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.

Example (b): referring to fig. 1, the air-tight valve comprises an outer surface body 1 and a one-way valve embedded in the outer surface body 1, wherein the one-way valve comprises a first valve 3 and a second valve 4 which are arranged along the extending direction of the outer surface body 1, the air-tight property of the first valve 3 is smaller than that of the second valve 4, and a turnover part 5 is installed between the first valve 3 and the second valve 4.

Specifically, as shown in fig. 1, the upper part of the outer body 1 is provided with a turning part partially extending outward, and the inside of the turning part forms a particle trap chamber 12, and when the air current holding the moisture or saliva particles is inputted, the turning part is turned and trapped by the particles under the inertia thereof to cover the same. Since the exhalation airflow is directly received at the position and the strength of the airflow is high, the rotary part is arranged at the position, and the capturing effect is better.

On the basis, the outer side of the rotary part can be provided with a fold structure 121, so that the contact surface with the outside is increased, the airflow is rapidly cooled down, and the particle activity is reduced.

The turning piece 5, where the structure of the turning piece 5 refers to a pine cone, is known to shrink in scale after it meets water, protecting the inside pine nuts. The principle lies in that the area of the outer side of the pine cone scale is larger than that of the inner side, and the area of the outer side directly contacting with water is larger, so that the expansion force of the outer side is larger than that of the inner side, namely, the pine cone scale is turned inwards and contracted. In the present embodiment, the principle is also applied, and wood fibers are disposed on the upper and lower surfaces of the turning member 5, and as shown in fig. 1, the density of fibers on the upper surface is lower than that on the lower surface, or no wood fibers are disposed on the upper surface, and when the moisture in the space reaches a certain amount, the turning sheet 5 is turned upwards to cover the first valve 3.

It is worth mentioning that, as shown in fig. 1, the upper end surface of the flip 5 is directly in front contact with the air flow, so that in another solution a water-shrinkable material, such as silk material, is provided on the upper end surface of the flip 5.

The flow guiding device further comprises a flow guiding surface 2 positioned on the inner side of the outer surface body 1, and when the flow guiding surface 2 is arranged, a proper through hole can be formed in the upper portion of the flow guiding surface 2, so that gas exhaled from the through hole can smoothly enter a flow field surrounded by the flow guiding surface 2 and the outer surface body 1.

As shown in fig. 1, the upper part of the flow guiding surface is also provided with an arc part, the arc part protrudes to one side of the outer surface body 1, the outer side of the arc part can be provided with a plurality of latticed convex parts made of polyurethane material, and a plurality of grooves in a spiral inclined structure are formed between the convex parts; a similar structure can be arranged on the outer surface body 1 opposite to the position, 11 in the figure, and airflow forms rotational flow in the groove, so that the capture rate of particles can be increased.

In addition, the middle part of the flow guiding surface 2 can be connected with the turning part 5, as shown in fig. 1 and fig. 2, in practical application, the connection at this position is likely to cause that the turning part 5 cannot turn, however, the applicant sets a layer of film at the outermost layer of the flow guiding surface, the weight of the film is small, the limiting force on the turning part 5 is also small, and the turning part is basically not influenced. After the membrane has been pulled out by the flipper 5, as in the case of figure 2. And guide surfaces with larger gradient are formed at two sides of the joint of the film and the turnover part 5, the cross section of the flow field is reduced, and the airflow entering from the upper part can be more favorably and quickly guided into the inlet of the second valve 4.

The working principle is as follows: taking the figure as an example, the thickness of the first valve 3 is smaller than that of the second valve 4 during production and installation, so that the air resistance of the first valve 3 is ensured to be smaller than that of the second valve 4, and other characteristics can be changed for control.

In the initial state the first valve 3 in the gas-tight condition starts to operate, it being noted that when the first valve 3 starts to operate the second valve 4 is inactive and the centrally located flap 5 functions as a flow guide, substantially all of the gas flow from the first valve 3.

When the internal water content reaches a certain threshold value, the turnover sheet 5 is turned over to the maximum extent to cover the first valve 3 (a sealing gasket can be arranged on the turnover sheet 5) to seal the first valve, and the second valve 4 starts to work after the first valve 3 stops working.

Claims

1. A has changeable formula gauze mask of bivalve which characterized in that: comprises an outer surface body (1) and a one-way valve embedded on the outer surface body (1), the one-way valve comprises a first valve (3) and a second valve (4), the air resistance of the first valve (3) is less than that of the second valve (4), a turnover part (5) is arranged between the first valve (3) and the second valve (4),

the turnover piece (5) is turned over in the process of absorbing moisture, and the turnover piece just can cover the inlet of a one-way valve when being turned over to one limit.

2. The switchable mask with dual valves of claim 1, wherein: the upper part of the outer body (1) is provided with a rotary part which partially extends outwards, and the inner side of the rotary part forms a particle catching cavity (12).

3. The switchable mask with dual valves of claim 1, wherein: the flow-guiding structure is characterized by further comprising a flow-guiding surface (2) positioned on the inner side of the outer surface body (1), and a flow field exhaled air flow formed between the flow-guiding surface (2) and the outer surface body (1) is communicated to the one-way valve.

4. The switchable mask with dual valves of claim 3, wherein: the turning piece (5) is horizontally arranged in an initial state, and a lower concave part facing the first valve (3) is arranged on the body of the turning piece.

5. The switchable mask with dual valves of claim 4, wherein: upset piece (5) are flexible material and make, and are sheet structure, and at least one side is provided with the fibre material layer that meets water inflation on its two terminal surfaces, if both ends face all is equipped with, the material layer density of one of them terminal surface must be less than another terminal surface material layer density.

6. The switchable mask with dual valves of claim 5, wherein: the layer of fibrous material is composed of wood fibres.