One-way valve and respiratory anesthesia equipment with same

Abstract

The one-way valve provided by the embodiment of the invention comprises a valve body and a valve core, the valve body comprises an air inlet and an air outlet, the inner wall of a channel of the air inlet is a first conical surface, and the valve element comprises a second conical surface arranged on the periphery of the end, facing the air inlet, of the channel. When the valve element covers the channel of the air inlet, the first conical surface is attached to the second conical surface, and air circulation of the air inlet and the air outlet is cut off. The inner wall of the channel of the air inlet of the one-way valve is the first conical surface, the periphery of the end, facing the channel of the air inlet, of the valve element is the second conical surface, when the air pressure of the air inlet is lower than the opening pressure, the valve element covers the channel of the air inlet and cuts off air circulation of the air inlet and the air outlet, the second conical surface is attached to the first conical surface, air leakage is not prone to occurring, and sealing performance is good.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more particularly to a one-way valve and a respiratory anesthesia device having the same. Background Technology

[0002] In the medical field, whether for human or veterinary use, one-way valves are often required to restrict the unidirectional flow of gas. When the gas pressure at the inlet of the one-way valve is lower than the opening pressure, the bottom of the valve core covers the inlet channel on the base, cutting off the gas flow between the inlet and outlet. Existing one-way valves have a flat bottom for the valve core and a cylindrical end face for the inlet channel on the base. Using a flat surface covering a cylindrical end face opening is prone to leakage and has poor sealing. Summary of the Invention

[0003] This invention provides a one-way valve, which aims to solve the problem of poor sealing performance of the one-way valve when it is not open in the prior art.

[0004] In one aspect, a one-way valve is provided, including a valve body (1) and a valve core (2). The valve body (1) includes an air inlet (11) and an air outlet (12). The inner wall of the air inlet (11) is a first conical surface (111), and the valve core (2) includes a second conical surface (21) disposed on the outer periphery of one end of the channel facing the air inlet (11). When the valve core (2) covers the passage of the air inlet (11), the first cone surface (111) and the second cone surface (21) fit together, cutting off the gas flow between the air inlet (11) and the air outlet (12).

[0005] Secondly, a respiratory anesthesia device is provided, including a gas supply device, a conduit, and a one-way valve as described above, wherein the one-way valve is installed in the conduit to control the unidirectional flow of gas into the conduit from the gas supply device.

[0006] In this embodiment of the invention, the inner wall of the channel of the one-way valve inlet is a first conical surface, and the outer periphery of the valve core facing the channel of the inlet is a second conical surface. When the air pressure at the inlet is lower than the opening pressure, the valve core covers the channel of the inlet, cutting off the gas flow between the inlet and outlet. The second conical surface and the first conical surface fit together, making it less prone to leakage and providing good sealing. Attached Figure Description

[0007] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a cross-sectional view of the one-way valve provided in Embodiment 1 of the present invention; Figure 2 yes Figure 1 Enlarged view of region A in the middle; Figure 3This is a cross-sectional view of the valve core provided in Embodiment 1 of the present invention; Figure 4 This is a bottom view of the top cover provided in Embodiment 1 of the present invention; Figure 5 This is an exploded view of the respiratory anesthesia device provided in Embodiment 2 of the present invention. Detailed Implementation

[0008] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar modules or modules having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Rather, embodiments of the present invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0009] In this embodiment of the invention, the inner wall of the channel of the one-way valve inlet is a first conical surface, and the outer periphery of the valve core facing the channel of the inlet is a second conical surface. When the air pressure at the inlet is lower than the opening pressure, the valve core covers the channel of the inlet, cutting off the gas flow between the inlet and outlet. The second conical surface and the first conical surface fit together, making it less prone to leakage and providing good sealing.

[0010] Figure 1 This is a cross-sectional view of the one-way valve provided in Embodiment 1 of the present invention. Figure 2 yes Figure 1 A magnified view of region A in the middle. (See image below.) Figure 1 and Figure 2 As shown, the one-way valve includes a valve body 1 and a valve core 2. The valve body 1 includes an inlet 11, an outlet 12, a top cover 13, and a base 14. The inlet 11 and outlet 12 are located on the base 14, and the inner wall of the inlet 11 is a first conical surface 111. The top cover 13 and the base 14 together form a receiving cavity. The valve core 2 moves within the receiving cavity, controlling the opening and closing of the inlet 11 and outlet 12. The valve core 2 includes a second conical surface 21, which is located on the outer periphery of the end of the valve core 2 facing the inlet 11. The end of the first conical surface 111 with a larger cross-section faces the valve core 2, and the end of the second conical surface 21 with a smaller cross-section faces the inlet 11. When the valve core 2 covers the inlet 11, the first conical surface 111 and the second conical surface 21 are in contact, cutting off the gas flow between the inlet 11 and outlet 12. In this embodiment of the invention, the base 14 is made of aluminum alloy, the first conical surface 111 is made by grinding process, the valve core 2 is made of hard silicone, and the first conical surface 111 and the second conical surface 21 fit together more closely.

[0011] When the air pressure at the inlet 11 reaches or exceeds the preset pressure, the gas pushes the valve core 2 to move, and the valve core 2 no longer covers the channel of the inlet 11 on the base 14, connecting the inlet 11 and the outlet 12. When the check valve is installed vertically, the weight of the valve core 2 is designed to be equivalent to the preset pressure, and the gas overcomes the weight of the valve core 2 to push it upward.

[0012] When the air pressure at the inlet 11 drops below a preset pressure, the valve core 2 descends. During the descent until the valve core 2 contacts the channel of the inlet 11, due to airflow fluctuations, their centers may not be aligned. The valve core 2, through the cooperation of the first conical surface 111 and the second conical surface 21, gradually slides into and covers the channel of the inlet 11, aligning their centers. The first conical surface 111 and the second conical surface 21 then fit together, cutting off the gas flow between the inlet 11 and the outlet 12. The cooperation of the first conical surface 111 and the second conical surface 21 allows the valve core 2 and the channel of the inlet 11 to self-align automatically. The valve core 2 has a simple structure and small size.

[0013] Figure 3 This is a cross-sectional view of the valve core provided in Embodiment 1 of the present invention. Figure 3 As shown, the valve core 2 also includes a groove 22, a cone 23, and an edge 24. The groove 22 is located at one end of the valve core 2 facing the air inlet 11, and the second cone 21 surrounds the groove 22. The groove 22 acts as a buffer chamber, which can reduce the impact of air pressure fluctuations on the valve core 2 when the air pressure at the air inlet 11 is lower than the preset pressure, thus preventing the valve core 2 from malfunctioning. The cone 23 is located at one end of the valve core 2 away from the air inlet 11, opposite to the groove 22 at opposite ends of the valve core 2. The cone 23 converges upward and towards the center, keeping the valve core 2 as horizontal as possible during its ascent. The edge 24 extends outward from the end of the second cone 21 away from the air inlet 11. When the valve core 2 covers the air inlet 11, the edge 24 is limited by the air inlet 11, preventing the valve core 2 from sliding too deeply into the air inlet 11.

[0014] Figure 4 This is a bottom view of the top cover provided in Embodiment 1 of the present invention. Figure 1 and Figure 4As shown, to limit the movement of the valve core 2 within the receiving cavity and to guide the valve core 2 to a certain extent, the upper cover 13 includes a guide groove 131. The opening of the guide groove 131 faces the channel of the air inlet 11, and the valve core 2 moves within the guide groove 131. When both the valve core 2 and the guide groove 131 have circular cross-sections, the diameter of the guide groove 131 is greater than or equal to the maximum diameter of the valve core 2. For example, if the diameter of the guide groove 131 is greater than or equal to the diameter of the edge 24, the valve core 2 rises and falls within the guide groove 131. Multiple through holes are evenly distributed on the side wall of the guide groove 131. When the valve core 2 moves, the portion of the through hole near the air inlet 11 is no longer blocked by the valve core 2, and the air inlet 11 connects to the air outlet 12 through the portion of the through hole near the air inlet 11.

[0015] In this embodiment of the invention, the inner wall of the channel of the one-way valve inlet is a first conical surface, and the outer periphery of the valve core facing the channel of the inlet is a second conical surface. When the air pressure at the inlet is lower than the opening pressure, the valve core covers the channel of the inlet, cutting off the gas flow between the inlet and outlet. The second conical surface and the first conical surface fit together, making it less prone to leakage and providing good sealing.

[0016] Figure 5 This is an exploded view of the respiratory anesthesia device provided in Embodiment 2 of the present invention. Figure 5 As shown, the respiratory anesthesia device includes a gas supply device, a pipeline, and a one-way valve as described in Embodiment 1. In this embodiment of the invention, the structure of the one-way valve is the same as that in Embodiment 1, and the components that are the same as those in Embodiment 1 use the same reference numerals as those in Embodiment 1, including all the features described in Embodiment 1, which will not be repeated here.

[0017] In this embodiment of the invention, a one-way valve is installed in the pipeline to control the unidirectional flow of gas into the pipeline from the gas supply device. A first sealing ring is provided between the upper cover 13 and the base 14, and a second sealing ring is provided between the base 14 and the pipeline to ensure the airtightness of the respiratory anesthesia device.

[0018] In this embodiment of the invention, the inner wall of the channel of the one-way valve inlet is a first conical surface, and the outer periphery of the valve core facing the channel of the inlet is a second conical surface. When the air pressure at the inlet is lower than the opening pressure, the valve core covers the channel of the inlet, cutting off the gas flow between the inlet and outlet. The second conical surface and the first conical surface fit together, making it less prone to leakage and providing good sealing.

[0019] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A one-way valve, characterized in that, include: Valve body (1) and valve core (2); The valve body (1) includes an air inlet (11) and an air outlet (12). The inner wall of the air inlet (11) is a first conical surface (111). The valve core (2) includes a second conical surface (21) disposed on the outer periphery of one end of the channel facing the air inlet (11). When the valve core (2) covers the passage of the air inlet (11), the first conical surface (111) and the second conical surface (21) fit together, cutting off the gas flow between the air inlet (11) and the air outlet (12).

2. The one-way valve according to claim 1, characterized in that, The valve core (2) also includes a groove (22) disposed at one end of its channel facing the air inlet (11), and the second conical surface (21) surrounds the groove (22).

3. The one-way valve according to claim 1, characterized in that, The valve core (2) also includes a cone (23) disposed at one end of its channel away from the air inlet (11).

4. The one-way valve according to claim 1, characterized in that, The valve core (2) also includes an edge (24) that extends outward from one end of the second conical surface (21) away from the air inlet (11); When the valve core (2) covers the channel of the air inlet (11), the edge (24) is limited by the channel of the air inlet (11).

5. The one-way valve according to claim 1, characterized in that, The valve core (2) is made of silicone.

6. The one-way valve according to any one of claims 1-5, characterized in that, The valve body (1) also includes a top cover (13) and a base (14), and the air inlet (11) is located on the base (14). The upper cover (13) and the base (14) enclose a cavity, and the valve core (2) moves within the cavity to control the opening and closing of the air inlet (11) and the air outlet (12).

7. The one-way valve according to claim 6, characterized in that, The top cover (13) includes a guide groove (131) with the opening of the guide groove (131) facing the passage of the air inlet (11); The valve core (2) moves within the guide groove (131).

8. The one-way valve according to claim 6, characterized in that, The base (14) is made of aluminum alloy.

9. The one-way valve according to claim 8, characterized in that, The first conical surface (111) is made by grinding.

10. A respiratory anesthesia device, characterized in that, It includes a gas supply device, a pipeline, and a one-way valve as described in any one of claims 1-9, wherein the one-way valve is installed in the pipeline to control the one-way flow of gas input into the pipeline by the gas supply device.

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