Diaphragm type anti-suffocation valve for electronic oxygen regulator

Abstract

The utility model provides a diaphragm type anti-suffocation valve for an electronic oxygen regulator. The diaphragm type anti-suffocation valve comprises a shell, a valve valve, an elastic piece and a switch diaphragm, a piston is arranged in the shell and divides an inner cavity of the shell into an upper inner cavity and a lower inner cavity, a baffle is arranged at the upper end of the shell, and an air hole used for communicating the mask cavity with outside air is formed in the baffle. The valve valve comprises a piston rod and a pressing plate, the pressing plate is arranged above the baffle, one end of the piston rod is connected with the pressing plate, and the other end of the piston rod penetrates into the inner cavity of the shell from the position above the baffle and is connected with the piston. The elastic piece is connected with the piston and the shell, and the switch diaphragm covers the air hole in an attached mode. When oxygen supply is insufficient, the elastic piece pushes the piston and the piston rod to drive the pressing plate to move upwards, the anti-suffocation valve is automatically opened, a user only needs small suction force, the outer end of the switch diaphragm can be turned up under the action of the internal and external pressure difference, external air enters the mask cavity, and normal breathing of the user is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of personal protective equipment, and more specifically to a diaphragm-type anti-asphyxiation valve for an electronic oxygen regulator. Background Technology

[0002] The anti-asphyxiation valve is one of the core components of an electronic oxygen regulator, ensuring the user's normal breathing in case of abnormal oxygen supply. When the oxygen supply pressure at the oxygen regulator inlet exceeds the design threshold, the anti-asphyxiation valve automatically locks, allowing the user to breathe oxygen provided by the oxygen source device. When the oxygen supply is insufficient, and the supply pressure falls below the design threshold, the anti-asphyxiation valve automatically unlocks. In this case, when the user inhales, the anti-asphyxiation valve opens under the pressure difference between the inside and outside, allowing the user to breathe outside air. When the user exhales, the anti-asphyxiation valve closes, isolating the oxygen regulator's breathing chamber from the outside environment.

[0003] Currently, the anti-asphyxiation valves in electronic oxygen regulators generally employ a flat valve structure, whose closure relies on the spring force. When the user inhales, a negative pressure is generated within the oxygen regulator's exhalation mask chamber, and the valve plate opens against the spring force due to the pressure difference between the inside and outside. When the user exhales, the negative pressure disappears, and the valve plate closes under the spring force. The spring force directly determines the valve's inspiratory resistance; for the user, the lower the inspiratory resistance, the better, making the design and manufacture of the spring very difficult. Furthermore, the user needs considerable suction force to overcome the spring force to open the valve, leading to breathing difficulties. Utility Model Content

[0004] To address the aforementioned deficiencies in existing technologies, a diaphragm-type anti-asphyxiation valve for electronic oxygen regulators is provided, which can effectively reduce the inhalation resistance of the anti-asphyxiation valve and ensure the user's normal breathing.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A diaphragm-type anti-asphyxiation valve for an electronic oxygen regulator, characterized in that it comprises a housing, a valve, an elastic element, and a switching diaphragm; a piston is provided in the inner cavity of the housing, which divides the inner cavity of the housing into an upper inner cavity and a lower inner cavity, the upper inner cavity being used to communicate with an oxygen source device, and the lower inner cavity being used to communicate with outside air; a baffle is provided at the upper end of the housing, the baffle having a vent hole for communicating with the mask cavity and outside air; the valve includes a piston rod and a pressure plate, the pressure plate being disposed above the baffle, one end of the piston rod being connected to the pressure plate, and the other end of the piston rod passing through the upper part of the baffle into the inner cavity of the housing and connected to the piston; the elastic element is connected to both the piston and the housing, and the switching diaphragm is fitted over the vent hole; when the oxygen source device supplies oxygen, the piston rod drives the pressure plate to move down and press against the switching diaphragm, locking the anti-asphyxiation valve.

[0007] According to the above technical solution, the shell includes an upper cover, a main shell, and a lower cover; the upper cover is provided with a venting channel for communicating with the outside air, and the venting channel is connected to the mask cavity through a vent hole; the upper inner cavity and the lower inner cavity are located in the main shell; the lower cover is provided with a lower cover inner cavity, and the lower cover inner cavity is connected to the outside air.

[0008] According to the above technical solution, the baffle is provided with a sleeve shaft at the point where the piston rod passes through, the sleeve shaft is sleeved on the piston rod, and the inner ring of the switching diaphragm is sleeved on the sleeve shaft.

[0009] According to the above technical solution, the switch diaphragm is a disc-shaped diaphragm with a recessed groove. When the user inhales, the outer end of the disc-shaped diaphragm flips up around the groove under the action of the internal and external pressure difference. The outside air first enters the ventilation channel in the housing, and then passes through the ventilation hole on the baffle and enters the mask cavity.

[0010] According to the above technical solution, the disc-shaped diaphragm is made of a flexible material.

[0011] According to the above technical solution, the piston is adapted to the size of the lower inner cavity, the cross-sectional size of the upper inner cavity is smaller than the cross-sectional size of the lower inner cavity, and the piston can move up and down along the lower inner cavity.

[0012] According to the above technical solution, the two ends of the elastic element are respectively connected to the piston and the bottom of the inner cavity of the lower cover.

[0013] According to the above technical solution, when the elastic element is in a compressed state and the oxygen source equipment is insufficient to supply oxygen, the elastic element pushes the piston upward, causing the pressure plate to move upward and automatically unlocking the anti-suffocation valve.

[0014] According to the above technical solution, the elastic element is a spring.

[0015] According to the above technical solution, the piston has a first groove protruding downward on its outer periphery, and a first sealing ring is provided in the first groove; the housing has a second groove at the piston rod insertion point, and a second sealing ring is provided in the second groove.

[0016] This invention has the following beneficial effects: When the oxygen source device is supplying oxygen normally, the oxygen supply pressure pushes the piston and piston rod downwards, causing the pressure plate to move down and press against the disc-shaped diaphragm, locking the anti-asphyxiation valve. At this time, the user breathes the oxygen provided by the oxygen source device. When the oxygen supply is insufficient, causing the oxygen supply pressure to be lower than the spring force, the spring pushes the piston rod upwards, causing the pressure plate to move up and opening the anti-asphyxiation valve. At this time, only a small suction force is needed, and the outer end of the disc-shaped diaphragm can be flipped upwards around the groove under the action of the internal and external pressure difference, allowing outside air to enter the mask cavity through the vent, thereby ensuring the user's normal breathing. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of a diaphragm-type anti-asphyxiation valve for an electronic oxygen regulator provided for an embodiment of this utility model (the anti-asphyxiation valve is in the unlocked state);

[0019] Figure 2 A schematic diagram of the locked state of a diaphragm-type anti-asphyxiation valve for an electronic oxygen regulator provided for an embodiment of this utility model;

[0020] Figure 3 A schematic diagram of the open state of a diaphragm-type anti-asphyxiation valve for an electronic oxygen regulator provided for an embodiment of this utility model;

[0021] In the diagram: 1. Shell; 11. Top cover; 111. Vent channel; 12. Main shell; 121. Upper inner cavity; 122. Lower inner cavity; 13. Lower cover; 131. Lower cover inner cavity; 14. First vent; 15. Second groove; 16. Second sealing ring; 17. Second vent; 2. Piston rod; 21. Piston; 22. First groove; 23. First sealing ring; 3. Spring; 4. Disc diaphragm; 41. Score groove; 5. Baffle; 51. Vent hole; 52. Sleeve shaft; 6. Pressure plate; 100. Mask cavity; 200. Outside air. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] like Figure 1As shown, this embodiment provides a diaphragm-type anti-asphyxiation valve for an electronic oxygen regulator. When in the unlocked state, the anti-asphyxiation valve mainly includes a housing 1, a valve, an elastic element, a switching diaphragm, a baffle 5, and a pressure plate 6. A piston 21 is provided inside the housing 1, dividing the inner cavity of the housing into an upper inner cavity 121 and a lower inner cavity 122. A baffle 5 is provided at the upper end of the housing 1, and the baffle 5 has a vent 51 for connecting the mask cavity 100 and the outside air 200. The valve includes a piston rod 2 and a pressure plate 6, with the pressure plate 6 positioned above the baffle 5. One end of the piston rod 2 is connected to the pressure plate 6, and the other end of the piston rod 2... The baffle 5 extends into the inner cavity of the housing and is connected to the piston 21. The elastic element is connected to the piston 21 and the housing 1 respectively. The switch diaphragm fits snugly over the vent 51. When the oxygen source device is insufficient, the anti-suffocation valve can open automatically. The user only needs a small suction force, and the outer end of the switch diaphragm can be flipped upward around the groove 41 under the action of the internal and external pressure difference, so that the outside air 200 first enters the housing 1, and then passes through the vent 51 on the baffle 5 and enters the mask cavity 100, thereby ensuring the user's normal breathing.

[0029] In this embodiment, the housing 1 includes an upper cover 11, a main housing 12, and a lower cover 13. The upper cover 11 has a ventilation channel 111 for communicating with outside air 200. The ventilation channel 111 communicates with the mask cavity 100 through a vent hole 51 on a baffle 5. The main housing 12 has an upper inner cavity 121, a lower inner cavity 122, and a first vent 14. The upper inner cavity 121 is located above the lower inner cavity 122, and its size is smaller than that of the lower inner cavity 122. The first vent 14 connects the oxygen source device and the upper inner cavity 121. A baffle 5 is screwed onto the upper end of the housing 1, and the baffle 5 has a vent hole 51 for communicating with outside air 200 and the mask cavity 100. The lower cover 13 is fixed to the main housing 12 with screws for easy installation of elastic components. The lower cover 13 has a lower cover cavity 131 and a second air hole 17. The lower cover cavity 131 is connected to the lower cavity 122 of the shell 1, and the cross-sectional dimension of the lower cover cavity 131 is smaller than that of the lower cavity 122. The second air hole 17 is used to connect the lower cover cavity 131 with the outside air 200.

[0030] In this example, the valve includes a piston rod 2 and a pressure plate 6. The pressure plate 6 is positioned above the baffle 5 and fixed to the piston rod 2 with screws. The baffle 5 has a sleeve 52 at the point where the piston rod 2 passes through. The sleeve 52 is fitted onto the piston rod 2, and the inner ring of the switching diaphragm is fitted onto the sleeve 52. One end of the piston rod 2 is connected to the pressure plate 6, and the other end of the piston rod 2 passes through the baffle 5 into the inner cavity of the housing 1, connecting to the piston 21. The piston 21 is sized to fit the lower inner cavity 122, allowing the piston rod 2 to move the piston 21 up and down within the lower inner cavity 122. The piston 21 has a downwardly protruding first groove 22 on its outer periphery, within which a first sealing ring 23 is located. The housing 1 has a second groove 15 at the point where the piston rod 2 passes through, within which a second sealing ring 16 is located. The first sealing ring 23 and the second sealing ring 16 improve the sealing performance of the upper inner cavity 121.

[0031] In this embodiment, the elastic element is specifically a spring 3, which is disposed in the lower inner cavity 122 and the lower cover inner cavity 131, and its upper and lower ends are respectively connected to the piston 21 and the lower cover 13. In the initial state, the spring 3 is in a compressed state, and its elastic force is a preset oxygen pressure threshold. The size of the spring 3 is adapted to the groove cavity formed by the first groove 22 and the lower cover inner cavity 131 to ensure that the spring 3 remains stable during the extension and contraction process. The switch diaphragm is specifically a disc-shaped diaphragm 4, which is made of flexible material and fits snugly on the vent hole 51 of the baffle 5. The inner ring of the disc-shaped diaphragm 4 is sleeved on the sleeve shaft 52 of the baffle 5, and the disc-shaped diaphragm 4 is provided with a concave groove 41. The pressure plate 6 is fixed to the piston rod 2 by screws. When the piston rod 2 moves downward, the pressure plate 6 can press on the disc-shaped diaphragm 4.

[0032] In this embodiment, the working process of a diaphragm-type anti-asphyxiation valve for an electronic oxygen regulator is as follows.

[0033] 1. When the oxygen source equipment supplies enough oxygen, oxygen enters the upper inner cavity 121 inside the housing 1 through the first air hole 14. Under the sealing action of the first sealing ring 23 and the second sealing ring 16, the air supply pressure in the upper inner cavity 121 rises rapidly, pushing the piston 21 to compress the spring 3 and move downward, squeezing out the air in the lower inner cavity 122 through the second air hole 17; the piston rod 2 drives the pressure plate 6 to move downward, so that the pressure plate 6 presses against the disc diaphragm 4, at which time the anti-suffocation valve is in the locked state.

[0034] 2. When the oxygen source equipment is insufficient or interrupted, the gas supply pressure will continuously decrease. When the gas supply pressure is less than the initial design threshold of the spring force of spring 3, spring 3 will push piston rod 2 to move upward, causing pressure plate 6 to move upward, exposing disc diaphragm 4, and the anti-suffocation valve will automatically unlock.

[0035] 3. After the anti-suffocation valve automatically unlocks, when the user inhales, a negative pressure is generated in the mask cavity 100. At this time, only a small suction force is needed, and the outer end of the disc diaphragm 4 can be flipped upward around the groove 41 under the action of the internal and external pressure difference. The outside air 200 first enters the ventilation channel 111 in the upper cover 11, and then passes through the ventilation hole 51 on the baffle 5 and enters the mask cavity 100, ensuring the user's normal breathing.

[0036] The embodiments described above are some, but not all, of the embodiments of this application. The detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

Claims

1. A diaphragm-type anti-asphyxiation valve for an electronic oxygen regulator, characterized in that, The device includes a housing, a valve, an elastic element, and a diaphragm. A piston is located within the housing, dividing the housing into an upper and lower cavity. The upper cavity communicates with an oxygen source device, while the lower cavity communicates with outside air. A baffle is located at the upper end of the housing, with a vent hole for connecting the mask cavity to outside air. The valve includes a piston rod and a pressure plate. The pressure plate is positioned above the baffle. One end of the piston rod is connected to the pressure plate, and the other end of the piston rod passes through the baffle and into the housing cavity, connecting to the piston. The elastic element is connected to both the piston and the housing. The diaphragm fits snugly over the vent hole. When the oxygen source device supplies oxygen, the piston rod moves the pressure plate downwards and presses against the diaphragm, locking the anti-suffocation valve.

2. A diaphragm-type anti-asphyxiation valve for an electronic oxygen regulator according to claim 1, characterized in that: The housing includes an upper cover, a main housing, and a lower cover; the upper cover has a ventilation channel for communicating with the outside air, and the ventilation channel is connected to the mask cavity through a vent. The upper inner cavity and the lower inner cavity are located in the main housing, and the lower cover has a lower cover inner cavity, which is connected to the outside air.

3. A diaphragm-type anti-asphyxiation valve for an electronic oxygen regulator according to claim 2, characterized in that: The baffle has a sleeve shaft at the point where the piston rod passes through, and the sleeve shaft is sleeved on the piston rod. The inner ring of the switching diaphragm is sleeved on the sleeve shaft.

4. A diaphragm-type anti-asphyxiation valve for an electronic oxygen regulator according to claim 2, characterized in that: The switch diaphragm is a disc-shaped diaphragm with a recessed groove. When the user inhales, the outer end of the disc-shaped diaphragm flips up around the groove under the action of the internal and external pressure difference. Outside air first enters the ventilation channel in the housing, and then passes through the ventilation hole on the baffle and enters the mask cavity.

5. A diaphragm-type anti-asphyxiation valve for an electronic oxygen regulator according to claim 4, characterized in that: The disc-shaped diaphragm is made of a flexible material.

6. A diaphragm-type anti-asphyxiation valve for an electronic oxygen regulator according to claim 1, characterized in that: The piston is adapted to the size of the lower inner cavity, and the cross-sectional size of the upper inner cavity is smaller than that of the lower inner cavity, allowing the piston to move up and down along the lower inner cavity.

7. A diaphragm-type anti-asphyxiation valve for an electronic oxygen regulator according to claim 2, characterized in that: The two ends of the elastic element are respectively connected to the piston and the bottom of the inner cavity of the lower cover.

8. A diaphragm-type anti-asphyxiation valve for an electronic oxygen regulator according to claim 7, characterized in that: When the elastic element is in a compressed state, and the oxygen supply from the oxygen source device is insufficient, the elastic element pushes the piston upward, causing the pressure plate to move upward and automatically unlocking the anti-suffocation valve.

9. A diaphragm-type anti-asphyxiation valve for an electronic oxygen regulator according to claim 1, characterized in that: The elastic element is a spring.

10. A diaphragm-type anti-asphyxiation valve for an electronic oxygen regulator according to claim 1, characterized in that: The piston has a first groove protruding downwards on its outer periphery, and a first sealing ring is provided in the first groove; the housing has a second groove at the piston rod insertion point, and a second sealing ring is provided in the second groove.

Images