Mask scavenging valve with bionic guard cell opening and closing function

Abstract

The invention discloses a mask scavenging valve with a bionic guard cell opening and closing function, which comprises an outer breathable waterproof layer, a middle breathable switch layer and an inner breathable water-absorbing layer, the outer breathable waterproof layer is fixedly connected with the edge of the inner breathable water-absorbing layer, and the middle breathable switch layer is arranged between the outer breathable waterproof layer and the inner breathable water-absorbing layer; a valve cavity is formed in the middle ventilation switch layer, a valve port is formed in the middle of the valve cavity, a supporting ring is fixed in the valve port, at least two positions of the side edges of the supporting ring are fixed to the inner wall of the valve cavity through elastic separation layers, and a water suction valve element is arranged in the valve cavity. The expansion and contraction change of the water suction valve element drags the supporting ring to control opening and closing of the valve port. The mask has the advantages that the mask is constructed according to the opening and closing function principle of bionic plant guard cells, the water absorption valve element expands and contracts in the process of absorbing and removing water vapor, the supporting ring is pulled to control automatic opening and closing of the valve port, the water vapor in the mask is reduced, the mask cannot rise to be attached to glasses, and the wearing comfort is enhanced.

Description

Technical Field

[0001] The present invention relates to the field of sanitary appliances, and particularly to a mask ventilation valve that imitates the opening and closing function of guard cells. Background Art

[0002] As a commonly used personal protective article, a mask is mainly used to prevent microorganisms, particulate matters, etc. in the air from entering the respiratory tract and reduce the risk of infection and disease transmission. When wearing a mask for a long time, the hot air exhaled by the human body will form water vapor on the inner side of the mask when contacting the cold air, and sometimes even condense into water droplets. At present, most masks have a single function and cannot solve the problem of the accumulation of generated water vapor. For some masks provided with a ventilation valve, it usually needs to be manually opened. While the operation is not convenient, it is also easy to forget to close it and keep it open for a long time. Therefore, the mask air valve cannot effectively identify and process water vapor. The water vapor is liquefied and adheres to the inner surface of the mask, the human face or on the glasses through the gap for a long time, resulting in uncomfortable wearing, shortened service life of the mask, and fogging of the glasses. Therefore, it is urgent to propose a mask ventilation valve that imitates guard cells and realizes automatic opening and closing to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a mask ventilation valve that imitates the opening and closing function of guard cells.

[0004] The present invention is implemented by the following technical solutions: A mask ventilation valve that imitates the opening and closing function of guard cells, comprising an outer breathable waterproof layer, a middle breathable switch layer, and an inner breathable water-absorbing layer. The edge of the outer breathable waterproof layer is fixedly connected to the edge of the inner breathable water-absorbing layer, and the middle breathable switch layer is disposed between the outer breathable waterproof layer and the inner breathable water-absorbing layer; A valve cavity is provided inside the middle breathable switch layer. A valve port is provided in the middle of the valve cavity. A support ring is fixed inside the valve port. At least two sides of the support ring are fixedly connected to the inner wall of the valve cavity, and at least two sides of the support ring are fixedly connected to the inner wall of the valve cavity through an elastic partition layer. A plurality of water-absorbing valve cores are provided inside the valve cavity. The opening and closing of the valve port are controlled by the expansion and contraction of the water-absorbing valve cores, which causes the deformation of the support ring.

[0005] Preferably, the middle breathable switch layer further includes a middle breathable waterproof layer and a middle breathable water-absorbing layer. The edge of the middle breathable waterproof layer is fixedly connected to the edge of the outer breathable waterproof layer, and the edge of the middle breathable water-absorbing layer is fixedly connected to the edge of the inner breathable water-absorbing layer. The valve cavity is formed between the middle breathable waterproof layer and the middle breathable water-absorbing layer.

[0006] Preferably, both the outer breathable waterproof layer and the middle breathable waterproof layer are made of moisture-proof non-woven fabric.

[0007] Preferably, both the inner air-permeable water-absorbing layer and the middle air-permeable water-absorbing layer are made of long fiber non-woven fabric.

[0008] Preferably, the support ring comprises at least four polypropylene sheets, and the ends of adjacent polypropylene sheets are fixedly connected.

[0009] Preferably, the connection part of the ends of the polypropylene sheets of the support ring is fixed to the inner wall of the valve cavity, or is fixed to the inner wall of the valve cavity through the elastic partition layer.

[0010] Preferably, the water-absorbing valve core is cylindrical, and a water-absorbing resin is coated on the surface of the water-absorbing valve core.

[0011] Preferably, both the water-absorbing valve core and the elastic partition layer are made of silicone rubber or polyurethane.

[0012] Advantages of the present invention: Constructed based on the principle of the opening and closing function of bionic plant guard cells, without additional energy. Utilize the process of the water-absorbing valve core absorbing and desorbing water vapor, and then expand and contract, which involves the deformation of the support ring to control the automatic opening and closing of the valve port. There is no need for manual opening and closing, enabling the exhaled air inside the mask to enter the outside through the valve port, reducing the accumulation inside the mask. After accelerating heat exchange, the water vapor inside the mask decreases and will not rise and adhere to the glasses, enhancing the wearing comfort; Select publicly available and mature materials, which are greener and more environmentally friendly than other products and have low costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0014] Figure 1 is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 is a schematic diagram of the valve port opening structure of the present invention.

[0016] Figure 3 is Figure 1 the top view of

[0017] Figure 4 is a schematic diagram of the structure of the present invention installed on a mask.

[0018] In the figure: outer air-permeable waterproof layer 1, middle air-permeable switch layer 2, middle air-permeable waterproof layer 2.1, middle air-permeable water-absorbing layer 2.2, inner air-permeable water-absorbing layer 3, valve cavity 4, valve port 5, support ring 6, polypropylene sheet 6.1, elastic partition layer 7, water-absorbing valve core 8. Detailed implementation mode

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0020] As Figure 1 、 Figure 2 、 Figure 3 and Figure 4 shown, a mask ventilation valve that imitates the opening and closing function of guard cells includes an outer breathable waterproof layer 1, a middle breathable switch layer 2, and an inner breathable water-absorbing layer 3. The edges of the outer breathable waterproof layer 1 and the inner breathable water-absorbing layer 3 are fixedly connected. The middle breathable switch layer 2 is placed between the outer breathable waterproof layer 1 and the inner breathable water-absorbing layer 3; The outer breathable waterproof layer 1 and the inner breathable water-absorbing layer 3 form an approximately elliptical and fully enclosed bag, which is installed and fixed on the mask. More than one can be installed. The outer breathable waterproof layer 1 faces the outside of the mask, and while being breathable, it can prevent moisture intrusion to a certain extent. The inner breathable water-absorbing layer 3 faces the inside of the mask, and while being breathable, it can absorb water vapor to a certain extent. In this embodiment, it is preferably that the areas of both the outer breathable waterproof layer 1 and the inner breathable water-absorbing layer 3 are 8 cm 2 .

[0021] A valve cavity 4 is provided inside the middle breathable switch layer 2. The middle breathable switch layer 2 further includes a middle breathable waterproof layer 2.1 and a middle breathable water-absorbing layer 2.2. The edge of the middle breathable waterproof layer 2.1 is fixedly connected to the edge of the outer breathable waterproof layer 1, and the edge of the middle breathable water-absorbing layer 2.2 is fixedly connected to the edge of the inner breathable water-absorbing layer 3. A valve cavity 4 is formed between the middle breathable waterproof layer 2.1 and the middle breathable water-absorbing layer 2.2; The middle breathable switch layer 2 forms an approximately elliptical and fully enclosed bag through the middle breathable waterproof layer 2.1 and the middle breathable water-absorbing layer 2.2, and is placed inside the outer breathable waterproof layer 1 and the inner breathable water-absorbing layer 3. The side of the middle breathable waterproof layer 2.1 facing the outer breathable waterproof layer 1 can prevent moisture intrusion to a certain extent while being breathable. The side of the middle breathable water-absorbing layer 2.2 facing the inner breathable water-absorbing layer 3 can absorb water vapor to a certain extent while being breathable. In this embodiment, it is preferably that the areas of both the middle breathable waterproof layer 2.1 and the middle breathable water-absorbing layer 2.2 are 7.8 cm 2 .

[0022] A valve port 5 is provided in the middle of the valve cavity 4, and a support ring 6 is fixed in the valve port 5. The side of the support ring 6 is fixed to the inner wall of the valve cavity 4 at least at two places, and the side of the support ring 6 is fixed to the inner wall of the valve cavity 4 at least at two places through an elastic partition layer 7. The support ring 6 includes at least four polypropylene sheets 6.1, and the ends of adjacent polypropylene sheets 6.1 are connected and fixed. The connection of the ends of the polypropylene sheets 6.1 of the support ring 6 is fixed to the inner wall of the valve cavity 4, or fixed to the inner wall of the valve cavity 4 through the elastic partition layer 7; the valve port 5 is formed and does not collapse through the support of the support ring 6. In this embodiment, four polypropylene sheets 6.1 are used to form the support ring 6, and the length of each polypropylene sheet 6.1 is 1.5 cm. The width is 0.3cm, and the four polypropylene sheets 6.1 are arranged in a diamond shape. Each polypropylene sheet 6.1 can be thick in the middle and thin at both ends, which is beneficial for the end connection points of adjacent polypropylene sheets 6.1 to be thinner and easy to deform, while the middle of the polypropylene sheet 6.1 has a certain support and is not easy to deform; the ends located at the top and bottom of the support ring 6 and connected to the two polypropylene sheets 6.1 are respectively fixed to the inner wall of the valve cavity 4, and the ends located on both sides of the support ring 6 and connected to the two polypropylene sheets 6.1 are respectively fixed to the inner wall of the valve cavity 4 through the elastic partition layer 7. Under normal conditions, the four polypropylene sheets 6.1 are aggregated with each other to close or minimize the valve opening 5.

[0023] A plurality of water-absorbing valve cores 8 are provided inside the valve cavity 4. The expansion and contraction of the water-absorbing valve cores 8 pulls the support ring 6 to deform to control the opening and closing of the valve port 5. The water-absorbing valve cores 8 are cylindrical, and the surface of the water-absorbing valve cores 8 is coated with a water-absorbing resin.

[0024] When there is water vapor in the mask, the water-absorbing resin on the surface of the water-absorbing valve core 8 inside the mask absorbs water and swells, causing the water-absorbing valve core 8 to deform and expand. Each water-absorbing valve core 8 will support the adjacent polypropylene sheet 6.1. When the polypropylene sheet 6.1 is not easy to deform, the adjacent elastic partition layer 7 is deformed. Under the influence of elastic force, the end connection of the polypropylene sheet 6.1 is pulled outward, causing the four polypropylene sheets 6.1 to expand from the middle to both sides, thereby opening the valve port 5. The exhaled air inside the mask passes through the valve port 5 to the outside, reducing the accumulation in the mask. After reducing hot air and accelerating heat exchange, the water vapor in the mask is reduced and will not rise and adhere to the glasses, thereby enhancing wearing comfort.

[0025] Preferably, the outer breathable waterproof layer 1 and the middle breathable waterproof layer 2.1 are both made of moisture-proof non-woven fabrics. By selecting the non-woven fabrics, the moisture-proof functional properties of the outer breathable waterproof layer 1 and the middle breathable waterproof layer 2.1 are emphasized.

[0026] Preferably, the inner breathable water-absorbing layer 3 and the middle breathable water-absorbing layer 2.2 are both made of long-fiber non-woven fabrics. By selecting the non-woven fabrics, the functional characteristics of the inner breathable water-absorbing layer 3 and the middle breathable water-absorbing layer 2.2 that need to absorb water are emphasized.

[0027] Preferably, the water-absorbing valve core 8 and the elastic isolation layer 7 are both made of silicone rubber or polyurethane materials, which can be elastically deformed and restored.

[0028] Working principle: When the present invention is in use, the user wears a mask. Exhaling causes water vapor to accumulate inside the mask. The water vapor sequentially passes through the inner breathable water-absorbing layer 3 and the middle breathable water-absorbing layer 2.2, and then is absorbed by the water-absorbing resin on the surface of the water-absorbing valve core 8 and swells, causing the water-absorbing valve core 8 to deform and expand. Each water-absorbing valve core 8 will press against the adjacent polypropylene sheet 6.1. When the polypropylene sheet 6.1 is not easily deformed, the adjacent elastic isolation layer 7 deforms. Affected by the elastic force, the end connection of the polypropylene sheet 6.1 is pulled and expanded outward, prompting the end of the polypropylene sheet 6.1 to expand outward, opening the valve port 5. The exhaled air inside the mask passes through the valve port 5 into the outside world, increasing the breathability of the mask. When the water vapor content inside the mask decreases, or when the mask is taken off and left standing, the water-absorbing resin dehydrates, the water-absorbing valve core 8 retracts due to elastic action, the pulling force of the elastic isolation layer 7 decreases, and it also retracts due to elastic action. Multiple polypropylene sheets 6.1 gather together to close the valve port 5.

[0029] Advantages: It is constructed based on the principle of the opening and closing function of bionic plant guard cells. Without additional energy, it uses the process of the water-absorbing valve core 8 absorbing and dehydrating water vapor to expand and contract, and pulls the support ring 6 to deform to control the automatic opening and closing of the valve port 5. There is no need for manual opening and closing, so that the exhaled air inside the mask enters the outside world through the valve port 5, reducing the accumulation inside the mask. After accelerating heat exchange, the water vapor inside the mask decreases and will not rise and adhere to the glasses, enhancing the wearing comfort. The selected materials are publicly available and mature, which is greener and more environmentally friendly than other products and has a low cost.

[0030] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mask ventilation valve with bionic guard cell opening and closing function, characterized in that: It includes an outer breathable waterproof layer, a middle breathable switch layer, and an inner breathable water-absorbing layer, wherein the outer breathable waterproof layer is fixedly connected to the edge of the inner breathable water-absorbing layer, and the middle breathable switch layer is placed between the outer breathable waterproof layer and the inner breathable water-absorbing layer; A valve cavity is provided inside the middle air permeable switch layer, a valve port is provided in the middle of the valve cavity, a support ring is fixed in the valve port, the side edges of the support ring are fixed to the inner wall of the valve cavity at least at two locations, the side edges of the support ring are fixed to the inner wall of the valve cavity via an elastic partition layer at least at two locations, a plurality of water suction valve cores are provided inside the valve cavity, and the opening and closing of the valve port are controlled by the expansion and contraction of the water suction valve cores that involve the support ring.

2. A mask ventilation valve with bionic guard cell opening and closing function according to claim 1, characterized in that: The middle breathable switch layer also includes a middle breathable waterproof layer and a middle breathable water-absorbing layer. The edge of the middle breathable waterproof layer is fixedly connected to the edge of the outer breathable waterproof layer, and the edge of the middle breathable water-absorbing layer is fixedly connected to the edge of the inner breathable water-absorbing layer. The valve cavity is formed between the middle breathable waterproof layer and the middle breathable water-absorbing layer.

3. A mask ventilation valve with bionic guard cell opening and closing function according to claim 2, characterized in that: The outer breathable waterproof layer and the middle breathable waterproof layer are both made of moisture-proof non-woven fabrics.

4. A mask ventilation valve with bionic guard cell opening and closing function according to claim 2, characterized in that: The inner breathable water-absorbing layer and the middle breathable water-absorbing layer are both made of long-fiber non-woven fabrics.

5. A mask ventilation valve with bionic guard cell opening and closing function according to claim 1, characterized in that: The support ring includes at least four polypropylene sheets, and the ends of adjacent polypropylene sheets are connected and fixed.

6. A mask ventilation valve with bionic guard cell opening and closing function according to claim 5, characterized in that: The connection part of the end of the polypropylene sheet of the support ring is fixed to the inner wall of the valve cavity, or is fixed to the inner wall of the valve cavity through the elastic isolation layer.

7. A mask ventilation valve with bionic guard cell opening and closing function according to claim 6, characterized in that: The water absorption valve core is cylindrical, and a water absorption resin is coated on the surface of the water absorption valve core.

8. A mask ventilation valve with bionic guard cell opening and closing function according to claim 7, characterized in that: The water absorption valve core and the elastic isolation layer are both made of silicone rubber or polyurethane.

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