Oxygen production valve

Abstract

The utility model discloses an oxygen making valve, including valve body, it includes casing, first chamber, second chamber and third chamber and air inlet channel, air outlet channel and exhaust passage, first chamber upper end is communicated with second chamber through upper opening, and first chamber lower end is communicated with third chamber through lower opening, and air inlet channel is used for connecting outside and third chamber, and air outlet channel is used for connecting outside and first chamber, and exhaust passage is used for connecting outside and second chamber, and pilot valve is set up in valve body one side, and is communicated with second chamber through a damping hole, and the air inlet channel one side is provided with the gas delivery channel that is communicated with pilot valve, and the valve core is set up in first chamber, and both ends are respectively covered with upper diaphragm and lower diaphragm, and the utility model uses upper and lower diaphragm to replace control piston and reset piston or reset spring, and the whole structure is complex and the manufacturing cost is higher.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to an oxygen generating valve. Background Technology

[0002] An oxygen concentrator is a device used to provide oxygen, widely used in medical, home care, and industrial fields. The oxygen valve, as one of the key components of an oxygen concentrator, plays a crucial role. Its function is to control the airflow direction, ensuring oxygen flows from the oxygen generator to the various points requiring oxygen supply, while simultaneously discharging waste gas. Most oxygen concentrator valves currently on the market employ control pistons and reset pistons or reset springs, resulting in complex overall structures and high manufacturing costs.

[0003] For the reasons mentioned above, it is necessary to improve the existing technology. Utility Model Content

[0004] I. Technical problems to be solved

[0005] This utility model addresses the aforementioned deficiencies in the existing technology by proposing an oxygen generating valve to solve the problems mentioned in the background art.

[0006] II. Technical Solution

[0007] To solve the above-mentioned technical problems, this utility model provides an oxygen generating valve, including a valve body. The valve body includes a housing, a first chamber, a second chamber, and a third chamber disposed within the housing, and an air inlet channel, an air outlet channel, and an exhaust channel formed on the housing. The upper end of the first chamber communicates with the second chamber through an upper opening, and the lower end of the first chamber communicates with the third chamber through a lower opening. The air inlet channel is used to connect the outside world and the third chamber, the air outlet channel is used to connect the outside world and the first chamber, and the exhaust channel is used to connect the outside world and the second chamber.

[0008] A pilot valve is disposed on one side of the valve body and communicates with the second chamber through a damping orifice. An air supply channel communicating with the pilot valve is provided on one side of the air intake channel.

[0009] The valve core is disposed in the first chamber and has an upper diaphragm and a lower diaphragm respectively fitted at both ends. The upper diaphragm is disposed in the second chamber and completely blocks the formation of the upper and lower chambers in the second chamber. The bottom end of the upper diaphragm abuts against the upper opening and the top end of the lower diaphragm abuts against the lower opening.

[0010] In the above technical solution, the pilot valve includes a pilot valve housing, a pilot valve core movably disposed in the pilot valve housing, a first return spring disposed on one side of the pilot valve core, a main valve core disposed in the pilot valve housing, and a second return spring disposed on one side of the main valve core and used to reset the main valve core.

[0011] In the above technical solution, the upper diaphragm and the lower diaphragm are provided with limiting protrusions on their periphery, and the housing is provided with limiting grooves that cooperate with the limiting protrusions.

[0012] In the above technical solution, the upper and lower ends of the valve core are recessed with limiting grooves, and the upper diaphragm and the lower diaphragm are respectively sleeved in the limiting grooves.

[0013] In the above technical solution, the lower diaphragm is provided with through holes.

[0014] III. Beneficial Effects

[0015] Compared with the prior art, the present invention has the following advantages: The present invention uses upper and lower diaphragms to replace the control piston and reset piston or reset spring, resulting in a complex overall structure and higher manufacturing cost. Attached Figure Description

[0016] Figure 1 This is a frontal three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of the rear view of this utility model.

[0018] Figure 3 This is a cross-sectional structural diagram of the gas transmission channel of this utility model.

[0019] Figure 4 This is a cross-sectional view of the valve core portion of this utility model.

[0020] Figure 5 This is a cross-sectional view of the pilot valve section of this utility model.

[0021] Figure 6 This is a schematic diagram of the upper and lower diaphragm structure of this utility model.

[0022] In the diagram: 1 is the valve body, 10 is the housing, 11 is the first chamber, 12 is the second chamber, 13 is the third chamber, 14 is the air inlet channel, 15 is the air outlet channel, 16 is the exhaust channel, 17 is the air delivery channel, 2 is the pilot valve, 20 is the damping orifice, 21 is the upper diaphragm, 22 is the lower diaphragm, 23 is the pilot valve housing, 24 is the pilot valve core, 25 is the first return spring, 26 is the main valve core, 27 is the second return spring, 110 is the upper opening, 111 is the lower opening, 120 is the upper chamber, 121 is the lower chamber, 200 is the limiting protrusion, 201 is the limiting groove, 220 is the through hole, 3 is the valve core, and 30 is the limiting groove. Detailed Implementation

[0023] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0024] Please see Figure 1-6 This utility model provides an oxygen generating valve, including a valve body 1. The valve body 1 includes a housing 10, a first chamber 11, a second chamber 12 and a third chamber 13 disposed within the housing 10, and an air inlet channel 14, an air outlet channel 15 and an exhaust channel 16 opened on the housing 10. The upper end of the first chamber 11 is connected to the second chamber 12 through an upper opening 110, and the lower end of the first chamber 11 is connected to the third chamber 13 through a lower opening 111. The air inlet channel 14 is used to connect the outside and the third chamber 13, the air outlet channel 15 is used to connect the outside and the first chamber 11, and the exhaust channel 16 is used to connect the outside and the second chamber 12.

[0025] Pilot valve 2 is disposed on one side of the valve body 1 and communicates with the second chamber 12 through a damping hole 20. An air supply channel 17 communicating with the pilot valve 2 is provided on one side of the air intake channel 14.

[0026] The valve core 3 is disposed in the first chamber 11, and an upper diaphragm 21 and a lower diaphragm 22 are respectively sleeved at both ends. The upper diaphragm 21 is disposed in the second chamber 12 and completely blocks the formation of the upper chamber 120 and the lower chamber 121 in the second chamber 12. The bottom end of the upper diaphragm 21 abuts against the upper opening 110, and the top end of the lower diaphragm 22 abuts against the lower opening 111.

[0027] In the above structure, the upper chamber is connected to the pilot valve through the damping orifice, and the lower chamber is connected to the exhaust channel. When the operator controls the pilot valve to open, some air enters the third chamber through the intake channel, and the remaining air flows into the pilot valve through the delivery channel, and then into the upper chamber through the damping orifice of the pilot valve. The accumulation of air in the upper chamber increases the air pressure, making the air pressure above the upper diaphragm higher than the air pressure below it. This air pressure pushes the upper diaphragm to deform downwards. The downward deformation of the upper diaphragm causes the bottom end to press against and seal the upper opening. At the same time, the downward movement of the upper diaphragm drives the valve core to move downwards. The valve core applies downward pressure to the lower diaphragm, causing the lower diaphragm to deform downwards. The lower diaphragm, which originally pressed against the lower opening at the top, deforms downwards, causing the lower opening to open. The air in the third chamber enters the first chamber through the lower opening and is then discharged through the exhaust channel.

[0028] When the operator closes the pilot valve, the damping orifice of the pilot valve is blocked. Some air enters the third chamber through the intake channel, while the remaining air flows to the pilot valve through the delivery channel. Because the pilot valve is closed, it cannot flow into the upper chamber through the damping orifice, preventing air from entering the upper chamber. As a result, the air pressure above the upper diaphragm is lower than the air pressure below it. Under the action of the reverse pressure difference, the upper diaphragm is pushed upward, so its bottom no longer presses against the upper opening to seal. The upper diaphragm drives the valve core to move upward, and the valve core drives the lower diaphragm to move upward, so that the top of the lower diaphragm presses against the lower opening to seal. Air in the third chamber no longer flows into the first chamber. Air in the first chamber flows out through the upper opening and is then discharged through the exhaust channel. The entire system uses upper and lower diaphragms to replace the original slide valve's control piston and reset piston, simplifying the structure and reducing production costs.

[0029] Specifically, the pilot valve 2 includes a pilot valve housing 23, a pilot valve core 24 movably disposed in the pilot valve housing 23, a first return spring 25 disposed on one side of the pilot valve core 24, a main valve core 26 disposed in the pilot valve housing 23, and a second return spring 27 disposed on one side of the main valve core 26 and used to reset the main valve core 26. The pilot valve is used to precisely control the fluid medium inside the oxygen generator valve and also plays a protective role.

[0030] Specifically, the upper diaphragm 21 and the lower diaphragm 22 are provided with limiting protrusions 200 on their periphery, and the housing 10 is provided with limiting grooves 201 that cooperate with the limiting protrusions 200. The cooperation of the limiting protrusions and the limiting grooves not only fixes the position of the upper and lower diaphragms, but also restricts the installation position of the upper and lower diaphragms, so that the bottom end of the upper diaphragm and the top end of the lower diaphragm can press against and seal the upper and lower openings, thereby achieving a sealing effect.

[0031] Specifically, the valve core 3 has a limiting groove 30 recessed at its upper and lower ends. The upper diaphragm 21 and the lower diaphragm 22 are respectively sleeved in the limiting groove 30. The limiting groove plays a limiting role in the upper and lower diaphragms, preventing the upper and lower diaphragms from shifting and causing the oxygen generating valve to become unusable.

[0032] Specifically, the lower diaphragm 22 has a through hole 220. The through hole allows the air entering the third chamber to pass directly through the through hole instead of pressing down on the lower diaphragm and causing it to deform. This reduces the area of ​​the air directly pressing against the surface of the lower diaphragm.

[0033] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. An oxygen generating valve, characterized in that, include: The valve body (1) includes a housing (10), a first chamber (11), a second chamber (12) and a third chamber (13) disposed in the housing (10), and an air inlet channel (14), an air outlet channel (15) and an exhaust channel (16) opened on the housing (10). The upper end of the first chamber (11) is connected to the second chamber (12) through an upper opening (110), and the lower end of the first chamber (11) is connected to the third chamber (13) through a lower opening (111). The air inlet channel (14) is used to connect the outside world and the third chamber (13). The air outlet channel (15) is used to connect the outside world and the first chamber (11). The exhaust channel (16) is used to connect the outside world and the second chamber (12). Pilot valve (2), the pilot valve (2) is disposed on one side of the valve body (1) and is connected to the second chamber (12) through a damping hole (20). An air supply channel (17) connected to the pilot valve (2) is opened on one side of the air intake channel (14). The valve core (3) is disposed in the first chamber (11) and has an upper diaphragm (21) and a lower diaphragm (22) respectively fitted at both ends. The upper diaphragm (21) is disposed in the second chamber (12) and completely blocks the formation of the upper chamber (120) and the lower chamber (121) in the second chamber (12). The bottom end of the upper diaphragm (21) presses against the upper opening (110) and the top end of the lower diaphragm (22) presses against the lower opening (111).

2. An oxygen generating valve as described in claim 1, characterized in that: The pilot valve (2) includes a pilot valve housing (23), a pilot valve core (24) movably disposed in the pilot valve housing (23), a first return spring (25) disposed on one side of the pilot valve core (24), a main valve core (26) disposed in the pilot valve housing (23), and a second return spring (27) disposed on one side of the main valve core (26) and used to reset the main valve core (26).

3. An oxygen generating valve as described in claim 1, characterized in that: The upper diaphragm (21) and the lower diaphragm (22) are provided with limiting protrusions (200) on their periphery, and the housing (10) is provided with a limiting groove (201) that cooperates with the limiting protrusions (200).

4. An oxygen generating valve as described in claim 1, characterized in that: The valve core (3) has a limiting groove (30) recessed at its upper and lower ends, and the upper diaphragm (21) and the lower diaphragm (22) are respectively fitted into the limiting groove (30).

5. An oxygen generating valve as described in claim 1, characterized in that: The lower diaphragm (22) has a through hole (220).

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