A mask breathing valve

Abstract

This utility model relates to a mask breathing valve, including a valve seat, a valve disc, and a valve cover. The valve seat has a valve hole, which includes an inclined surface forming an angle of 60° to 80° with the bottom surface of the valve seat. A guide plate is provided at the center of the valve hole. The valve disc is fixed to the edge of the valve hole by a column. By tilting the valve hole and adding a guide plate, the concentration and speed of the airflow are accelerated, making it easier for the valve disc and valve hole to open. At the same time, the increased contact area makes it easier to seal during inhalation.

Description

Technical Field

[0001] This utility model relates to the field of mask technology, specifically to a mask breathing valve. Background Technology

[0002] People working in polluted environments typically wear filtering masks to protect themselves from inhaling pollutants. These masks usually have fiber or adsorbent filters that remove particulate and / or gaseous pollutants from the air. While wearing a mask in a polluted environment, the wearer feels comfortable knowing they are breathing filtered air; however, they may also feel discomfort due to the warm, humid air that accumulates around their face. This can easily lead to contact dermatitis and eczema, worsening of acne, fungal infections, etc. The high moisture content and density of the warm, humid air can make breathing more difficult (especially for those with weaker cardiopulmonary function), and in the long term, may cause shortness of breath, dizziness, and even trigger asthma or acute exacerbations of COPD.

[0003] Therefore, quickly removing hot and humid exhaust gases has become a key focus for continuous product improvement. However, the focus on simply exhaling to remove hot and humid gases should not come at the expense of airtightness. This means ensuring that ambient gases can only pass through the single channel of the fiber filter or adsorbent filter during inhalation, thus avoiding breathing in contaminated air.

[0004] The first type is the "button-operated" exhalation valve. This type typically uses a thin, round, flexible valve disc as the dynamic mechanical element that allows exhaled air to escape from inside the mask. The valve disc is centrally mounted to the valve seat via a central post. When a person exhales, the circumferential portion of the valve disc rises from the valve seat, thus expelling hot, humid waste gas. Simultaneously, during inhalation, the valve disc and valve seat are tightly sealed, functioning as a one-way valve. However, because the center of the valve disc is a fixed pressure point, the lever arm from the circumference of the valve disc to the center point is only the radius of the orifice, requiring a larger airflow to open the valve disc circumferentially.

[0005] The second type is the "cantilever" exhalation valve. It uses a single, flexible valve disc mounted eccentrically in a cantilever configuration to minimize the expiratory pressure required to open the valve. When the valve opening pressure is minimized, less force is needed to operate the valve, meaning the wearer doesn't need to exert effort to expel exhaled air from inside the mask during breathing. Simultaneously, during inhalation, the valve disc and valve seat seal tightly, functioning as a one-way valve. While the "cantilever" valve significantly reduces expiratory resistance, it places higher demands on the valve disc. Because the valve disc is cantilevered, the lever arm has an increased radius compared to the "button" type, thus reducing expiratory resistance by half. However, the sealing performance between the valve disc and the valve orifice is affected by the valve disc material; materials that are too hard or too soft will affect the seal between the valve disc and the valve seat orifice. Utility Model Content

[0006] The purpose of this invention is to provide a mask breathing valve to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A mask breathing valve includes a valve seat, a valve disc, and a valve cover. The valve seat has a valve hole, which includes an inclined surface that forms an angle of 60° to 80° with the bottom surface of the valve seat. A guide plate is provided at the center of the valve hole. The valve disc is fixed to the edge of the valve hole by a column.

[0009] In one possible implementation, the end of the guide plate extends to the edge of the valve orifice outlet, and the surface of the guide plate is a streamlined curved surface.

[0010] In one possible implementation, the valve cover is fixed to the valve seat by a snap-fit ​​structure, and the valve cover is provided with an air guide channel corresponding to the valve hole.

[0011] In one possible implementation, the guide plate is located on the side of the valve orifice away from the inclined surface.

[0012] In one possible implementation, the guide plate is formed by thickening one of the central support ribs of the valve hole, and the guide plate is parallel to the inclined surface.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. By tilting the valve orifice and adding a guide plate, the concentration and speed of the airflow are accelerated, making it easier for the valve disc and valve orifice to open. At the same time, the increased contact area makes it easier to seal during air intake.

[0015] 2. It effectively reduces the demand for valve disc material and significantly reduces production costs. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the breathing valve of the mask according to this utility model;

[0017] Figure 2 This is a cross-sectional view of the breathing valve of the mask according to this utility model;

[0018] Figure 3 This is a schematic diagram of the valve seat structure of this utility model. Detailed Implementation

[0019] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0020] In existing cantilever exhalation valves, the valve orifice is circular, with a cross-shaped support rib inside. While this structure effectively reduces breathing resistance, it significantly reduces the seal between the valve disc and the valve orifice. This patent improves the structure of the valve orifice, increasing the contact area between the valve orifice and the valve disc, thus enhancing the sealing performance.

[0021] like Figure 1-3 As shown, a mask breathing valve includes a valve seat 1, a valve disc 2, and a valve cover 3. The valve seat 1 has a valve hole 11, which includes an inclined surface 111. The inclined surface 111 forms an angle of 60° to 80° with the bottom surface of the valve seat. A guide plate 12 is provided at the center of the valve hole 11. The valve disc 2 is fixed to the edge of the valve hole 11 by a column 21. The end of the guide plate 12 extends to the outlet edge of the valve hole 11, and the surface of the guide plate 12 is a streamlined curved surface. The valve cover 3 is fixed to the valve seat 1 by a snap-fit ​​structure 31, and the valve cover 3 has an air guiding channel 32 corresponding to the valve hole 11. The guide plate 12 is located on the side of the valve hole 11 away from the inclined surface 111, and it is formed by thickening one of the central support ribs of the valve hole 11. The guide plate 12 is parallel to the inclined surface 111, and the thickness of the guide plate 12 is 1.5 to 2 times the thickness of the support rib. The presence of the baffle directs some of the air to the bottom of the valve orifice, where the valve disc experiences a greater airflow impact, further reducing the opening resistance and making it easier for the hot and humid gas to escape.

[0022] In this invention, the circular valve orifice is replaced with an inclined orifice, where the optimal angle α between the inclined surface and the base is 70°. Designing the valve orifice with an asymmetrical structure and an inclined surface facilitates valve disc opening. Because the valve orifice includes an inclined surface, the area of ​​region A in the rectangular area where the valve disc and valve cover are installed is approximately 6% larger than in the traditional design, increasing the contact area with the valve disc and improving sealing. Region B is an extension of the valve orifice surface towards the column side, significantly expanding the contact area with the valve disc. This results in a superior sealing effect for the valve disc.

[0023] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", "left and right", "front and back", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A mask breathing valve, comprising a valve seat (1), a valve disc (2), and a valve cover (3), characterized in that: The valve seat (1) is provided with a valve hole (11), the valve hole (11) includes an inclined surface (111), the inclined surface (111) forms an angle of 60°~80° with the bottom surface of the valve seat; A guide plate (12) is provided at the center of the valve hole (11); The valve disc (2) is fixed to the edge of the valve hole (11) by a column (21).

2. A mask breathing valve according to claim 1, characterised in that The end of the guide plate (12) extends to the edge of the valve hole (11) outlet, and the surface of the guide plate (12) is a streamlined curved surface.

3. The mask breathing valve of claim 1, wherein The valve cover (3) is fixed to the valve seat (1) by a snap-fit ​​structure (31), and the valve cover (3) is provided with an air guide channel (32) corresponding to the valve hole (11).

4. The mask breathing valve of claim 1, wherein The guide plate (12) is located in the valve hole (11) on the side away from the inclined surface (111).

5. A mask breathing valve according to claim 4, wherein The guide plate (12) is formed by thickening one of the central support ribs of the valve hole (11), and the guide plate (12) is parallel to the inclined surface (111).

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