Pilot diaphragm type oxygen generation valve for portable computer
By designing the pressure sequence chamber and seal in the pilot diaphragm oxygen-making valve of the portable oxygen-making machine, the problem of equipment pressure relief in the low-pressure state is solved, and the normal operation and switching of the equipment in the low-pressure state is achieved.
Patent Information
- Application Number
- CN202421452907.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-06-24
AI Technical Summary
The air inlet, air outlet and exhaust port of the pilot diaphragm oxygen generator are interoperable under low pressure, resulting in continuous pressure relief and the normal switching is not possible, especially in environments with low plateau air pressure.
A pilot diaphragm-type oxygen-making valve including a valve body, a pressure sequence chamber and a seal is designed. By setting a pressure sequence chamber and a seal in the valve body, the position of the seal is controlled by using a pressure threshold to avoid intercommunication of the air inlet, air outlet and exhaust port at low pressure.
It effectively avoids the continuous pressure relief state in the valve during low pressure, ensures that the oxygen-control valve can switch and operate normally under low pressure, and improves the reliability and stability of the equipment.
Smart Images
Figure CN222963385U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oxygen-making valves, in particular to a portable machine-used pilot diaphragm type oxygen-making valve. Background Art
[0002] An oxygen generator is a kind of machine for producing oxygen. Its principle is to use air separation technology to extract oxygen from the air for household or medical use. A molecular sieve oxygen generator adopts physical pressure swing adsorption oxygen production technology. Its oxygen production principle is mainly through an air compressor, so that oxygen and nitrogen in the air pass through the molecular sieve, and the oxygen and nitrogen in the air are separated by using the difference in the adsorption capacity of the molecular sieve for oxygen and nitrogen in the air, so as to obtain high-concentration oxygen.
[0003] The compressor, the oxygen-making valve and the molecular sieve are the core components of the molecular sieve oxygen generator. The valve body of the oxygen-making valve is provided with a valve body air inlet, a valve body air outlet and a valve body exhaust port. When powered on, the valve body air outlet is communicated with the valve body air inlet. When powered off, the valve body air outlet is communicated with the valve body exhaust port. The compressor is communicated with the valve body air inlet of the oxygen-making valve, and the molecular sieve is communicated with the valve body air outlet of the oxygen-making valve. When making oxygen (the oxygen-making valve is powered on), when the high-pressure gas passes through the molecular sieve, nitrogen will be adsorbed by the molecular sieve, so as to obtain high-concentration oxygen; after decompression (the oxygen-making valve is powered off), the nitrogen adsorbed in the molecular sieve is discharged through the valve body air outlet and the valve body exhaust port in sequence, so that the molecular sieve can be used repeatedly for a long time.
[0004] At present, there are many types of oxygen-making valves for portable oxygen generators. The pilot type oxygen-making valve is a common type of oxygen-making valve. The start of the pilot type oxygen-making valve usually requires a starting air pressure. When the portable oxygen generator starts, it takes a process for the air compressor to build pressure at the outlet. At low pressure, the air inlet, air outlet and exhaust port in the diaphragm valve will be interconnected, resulting in a continuous pressure relief state, which will cause the air pressure in the pilot diaphragm type oxygen-making valve to be too low to be normally switched on and off. Especially in the environment of low air pressure and thin air on the plateau, this situation is particularly obvious. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a portable machine-used pilot diaphragm type oxygen-making valve for the above problems existing in the prior art.
[0006] The purpose of the utility model can be realized by the following technical solutions:
[0007] A valve body, the valve body is provided with a first air inlet hole, a pressure sequence cavity and a first air outlet hole; one end of the first air inlet hole leads to the outside of the valve body, and the other end penetrates through to the first air outlet hole;
[0008] The pressure sequence chamber is provided with an inlet end, and the inlet end is communicated with the first air outlet hole; a seal and a reset member are installed in the pressure sequence chamber; the seal is movably abutted against the inlet end; the reset member is connected to the seal; when the air pressure received by the first air inlet hole is greater than the threshold value, the seal is separated from the inlet end; when the air pressure received by the first air inlet hole is less than the threshold value, the seal abuts against the inlet end;
[0009] A lower valve cover, the lower valve cover is detachably and fixedly installed on the valve body, the lower end cover is provided with a positioning block, and the positioning block is arranged in the pressure sequence chamber and is on the same axis as the pressure sequence chamber; the reset member is fixedly installed on the positioning block.
[0010] Preferably, the inlet end of the pressure sequence chamber is conical; the pressure sequence chamber and the first air outlet hole are arranged on the same axis.
[0011] Preferably, it further includes an upper valve cover, and the upper valve cover is detachably installed on the valve body; the upper valve cover is provided with a second air inlet hole, and the second air inlet hole penetrates through the first air outlet hole and the pressure sequence chamber, and the second air inlet hole, the first air outlet hole and the pressure sequence chamber are arranged on the same axis.
[0012] Preferably, a sealing ring is installed at the interface between the second air inlet hole of the upper valve cover and the first air outlet hole of the valve body; a sealing ring is installed at the interface between the lower valve cover and the pressure sequence chamber of the valve body.
[0013] Preferably, it further includes a pilot valve, and the pilot valve is installed on the upper valve cover, and the pilot valve has a powered-on state and a powered-off state; the upper valve cover is provided with a pilot valve air inlet hole, and the pilot valve air inlet hole is communicated with the second air inlet hole.
[0014] Preferably, a diaphragm valve chamber is arranged in the valve body, a third air inlet hole is arranged on the inner wall of the pressure sequence chamber, and the third air inlet hole penetrates into the diaphragm valve chamber.
[0015] Preferably, a second air outlet hole, an exhaust port and a diaphragm valve assembly are arranged in the diaphragm valve chamber, one end of the second air outlet hole penetrates to the outside of the valve body, and the other end penetrates into the diaphragm valve chamber; the exhaust port is arranged on the inner wall of the diaphragm valve chamber and penetrates to the outside of the valve body; the diaphragm valve group is arranged in the diaphragm valve chamber in a liftable manner.
[0016] Preferably, the lifting stroke of the diaphragm valve group includes a rising position and a falling position; when the pilot valve is in the powered-on state, the diaphragm valve group reaches the falling position; when the pilot valve is in the powered-off state, the diaphragm valve group reaches the rising position.
[0017] Compared with the prior art, the utility model has at least the following beneficial effects:
[0018] 1. A pressure sequence structure is added between the pilot air inlet and the main air inlet of the molecular sieve, effectively avoiding the continuous pressure relief state caused by the intercommunication of the air inlet, air outlet and exhaust port in the valve at low pressure, and solving the problem that the oxygen production valve can also operate normally in the switching state at low pressure.
[0019] 2. The pressure control structure is set as the structure of the seal and the reset member, which has a simple and reliable structure and is not easy to break, greatly reducing the maintenance frequency.
[0020] 3. The inlet of the pressure sequence chamber is set to be conical, greatly increasing the sealing performance of the seal and avoiding the phenomenon of air leakage when the pressure does not reach the threshold value. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of the internal structure of the pressure control structure of the utility model.
[0022] Figure 2 It is a three-dimensional schematic diagram of the pressure control structure of the utility model.
[0023] Figure 3 It is an exploded schematic diagram of the oxygen production valve structure of the utility model.
[0024] Figure 4 It is a schematic diagram of the diaphragm valve of the utility model in the energized state.
[0025] Figure 5 It is a schematic diagram of the diaphragm valve of the utility model in the de-energized state.
[0026] In the figure, 100, valve body; 110, pressure sequence chamber; 111, seal; 112, reset member; 113, third air inlet hole; 120, first air inlet hole; 130, first air outlet hole; 141, second air outlet hole; 142, exhaust port; 143, air inlet valve port; 144, exhaust valve port; 151, upper diaphragm; 152, valve core; 153, lower diaphragm; 200, lower valve cover; 210, positioning block; 300, upper valve cover; 310, second air inlet hole; 400, pilot valve; 410, pilot valve air inlet hole; 500, sealing ring; 600, exhaust hood; 610, positioning strip. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0027] The following are specific embodiments of the utility model in combination with the drawings, and the technical solutions of the utility model will be further described, but the utility model is not limited to these embodiments.
[0028] Such as Figures 1-5As shown in the figure, a pilot diaphragm type oxygen-making valve for a portable machine includes: a valve body 100, the valve body 100 is provided with a first air inlet hole 120, a pressure sequence chamber 110 and a first air outlet hole 130; one end of the first air inlet hole 120 leads to the outside of the valve body 100, and the other end penetrates through to the first air outlet hole 130; the pressure sequence chamber 110 is provided with an inlet end, and the inlet end is communicated with the first air outlet hole 130. A seal 111 and a reset member 112 are installed in the pressure sequence chamber 110; the seal 111 is movably abutted against the inlet end; the reset member 112 is connected to the seal 111; when the air pressure at the first air outlet hole 130 is greater than the threshold value, the seal 111 is separated from the inlet end; when the air pressure at the first air outlet hole 130 is less than the threshold value, the seal 111 abuts against the inlet end; it further includes a lower valve cover 200, the lower valve cover 200 is detachably and fixedly installed on the valve body 100, a positioning block 210 is arranged on the lower valve cover 200, the positioning block 210 is arranged in the pressure sequence chamber 110 and is on the same axis as the pressure sequence chamber 110; the reset member 112 is fixedly installed on the positioning block 210.
[0029] One end of the first air inlet hole 120 leads to the outside of the valve body 100 and is equipped with a connector, and the first air inlet hole 120 is externally connected to a compressor through the connector. The pressure sequence chamber 110 is communicated with the first air inlet hole 120 through the first air outlet hole 130. In the non-ventilated state, the seal 111 always abuts against the inlet end of the pressure sequence chamber 110 through the reset member 112; in the initial stage of compressor ventilation, the first air inlet hole 120, the first air outlet hole 130, the second air inlet hole 310 and the pilot valve air inlet hole 410 reach the pilot valve 400 and start to build pressure in the pilot valve 400. When the air pressure in the hole reaches the threshold value (that is, the air pressure at the pilot end is greater than the threshold value), under the action of the air pressure, the seal 111 pushes the reset member 112 to make it displace, and then the gas flows to the pressure sequence chamber 110. A third air inlet hole 113 is further provided on the inner wall of the pressure sequence chamber 110, and the gas is introduced into the diaphragm valve cavity through the third air inlet hole 113.
[0030] This design enables pressure to start building up before the gas enters the diaphragm valve cavity, effectively avoiding the continuous pressure relief state caused by the three-way communication of the exhaust port 142, the intake valve port 143 and the exhaust valve port 144 in the diaphragm valve cavity at low pressure, and solving the problem that the oxygen-making valve can also operate normally in the low-pressure state. In addition, through the combination of the seal 111 and the reset member 112, the structure is simple and not easily damaged, with higher cost-effectiveness and reduced maintenance costs.
[0031] It should be added that the inlet end of the pressure sequence chamber 110 is set to be conical, and the pressure sequence chamber 110 and the first air outlet hole 130 are arranged on the same axis. By better fitting the seal 111 on the conical surface of the inlet end, the sealing performance is increased, and the possibility of gas leakage at low pressure is greatly reduced.
[0032] AsFigures 1-5 As shown in the figure, on the basis of the above-described embodiment, it further includes an upper valve cover 300, which is detachably installed on the valve body 100; the upper valve cover 300 is provided with a second air inlet hole 310, the second air inlet hole 310 penetrates through the first air outlet hole 130, and the second air inlet hole 310, the first air outlet hole 130 and the pressure sequence cavity 110 are arranged on the same axis. The upper valve cover 300 also has a gas flow passage, and the second air inlet hole 310 communicates with the pilot valve air inlet hole 410 through this gas flow passage to deliver gas to the pilot valve 400 and start building pressure.
[0033] On the basis of the above-described embodiment, a sealing ring 500 is installed at the interface between the second air inlet hole 310 of the upper valve cover 300 and the first air outlet hole 130 of the valve body 100; a sealing ring 500 is also installed at the interface between the lower valve cover 200 and the pressure sequence cavity 110 of the valve body 100, avoiding gas leakage during the working state.
[0034] As Figures 1-5 shown in the figure, on the basis of the above-described embodiment, it further includes a pilot valve 400, the pilot valve 400 is installed on the upper valve cover 300, and the pilot valve 400 has a powered-on state and a powered-off state; when the pilot valve 400 is in the powered-on state, the pilot valve 400 will introduce gas into the space above the upper diaphragm 151 of the diaphragm valve cavity; when the pilot valve 400 is in the powered-off state, gas will not enter the diaphragm valve cavity. The upper valve cover 300 is provided with a pilot valve air inlet hole 410, and the pilot valve air inlet hole 410 communicates with the second air inlet hole 310.
[0035] As Figures 1-5 shown in the figure, on the basis of the above-described embodiment, a diaphragm valve cavity is provided in the valve body 100, a diaphragm valve group, a second air outlet hole 141 and an exhaust port 142 are provided in the diaphragm valve cavity, one end of the second air outlet hole 141 penetrates to the outside of the valve body 100 and is provided with an interface, the second air outlet hole 141 is connected to the molecular sieve through the interface, and the other end penetrates into the diaphragm valve cavity; the diaphragm valve group includes an upper diaphragm 151, a valve core 152 and a lower diaphragm 153.
[0036] The inner wall of the pressure sequence cavity 110 is provided with a third air inlet hole 113, the third air inlet hole 113 penetrates into the diaphragm valve cavity, and when the pressure sequence cavity 110 is ventilated, gas passes through the third air inlet hole 113 to the diaphragm valve cavity.
[0037] The exhaust port 142 is arranged on the inner wall of the diaphragm valve cavity, the exhaust port 142 penetrates to the outside of the valve body 100, the exhaust port 142 leads to the exhaust valve port 144 to discharge the gas separated by the molecular sieve and flows into the exhaust hood 600, and a positioning strip 610 is also provided between the exhaust hood 600 and the valve body 100. The exhaust hood 600 mainly plays a role of confluence;
[0038] In addition, the diaphragm valve group is arranged to be liftable in the diaphragm valve cavity.
[0039] As Figures 1-5 shown, on the basis of the above embodiment, the lifting stroke of the diaphragm valve group includes a rising position and a falling position; when the pilot valve 400 is in the energized state, the pilot valve 400 leads the gas to the upper part of the diaphragm valve group, and the gas pushes the upper diaphragm 151 through the action of air pressure, so that the diaphragm valve group reaches the falling position, and then the intake valve port 143 is opened, and the gas can enter the second air outlet hole 141 through the intake valve port 143, and then the gas is guided to the molecular sieve by the second air outlet hole 141; when the pilot valve 400 is in the de-energized state, the pilot valve 400 no longer supplies gas, and the diaphragm valve group reaches the rising position under the action of air pressure, the intake valve port 143 is closed, and the exhaust valve port 144 is opened, and the gas separated by the molecular sieve flows into the exhaust hood 600 through the exhaust valve port 144.
[0040] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.
[0041] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0042] In the present invention, unless otherwise clearly specified and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.
[0043] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.
Claims
1. A pilot diaphragm oxygen valve for portable machine, characterized in that: include: A valve body (100), wherein the valve body (100) is provided with a first air inlet (120), a pressure sequence chamber (110), and a first air outlet (130); one end of the first air inlet (120) leads to the outside of the valve body (100), and the other end passes through the first air outlet (130); The pressure sequence chamber (110) is provided with an inlet end, and the inlet end is connected to the first air outlet (130); a sealing member (111) and a reset member (112) are installed in the pressure sequence chamber (110); the sealing member (111) movably contacts the inlet end; the reset member (112) is connected to the sealing member (111); when the air pressure received by the first air outlet (130) in the valve body (100) is greater than a threshold value, the sealing member (111) is separated from the inlet end; when the air pressure received by the first air outlet (130) in the valve body (100) is less than a threshold value, the sealing member (111) contacts the inlet end; a lower valve cover (200), the lower valve cover (200) being detachably fixedly mounted on the valve body (100), the lower valve cover (200) being provided with a positioning block (210), the positioning block (210) being arranged in the pressure sequence chamber (110); the reset element (112) being fixedly mounted on the positioning block (210); The valve body (100) further comprises an upper valve cover (300), wherein the upper valve cover (300) is detachably mounted on the valve body (100); the upper valve cover (300) is provided with a second air inlet hole (310), the second air inlet hole (310) is connected to the first air outlet hole (130), and the second air inlet hole (310), the first air outlet hole (130) and the pressure sequence chamber (110) are arranged on the same axis; A sealing ring (500) is installed at the interface between the second air inlet (310) of the upper valve cover (300) and the first air outlet (130) of the valve body (100); and a sealing ring (500) is installed at the interface between the lower valve cover (200) and the pressure sequence chamber (110) of the valve body (100).
2. A pilot diaphragm oxygen-generating valve for a portable machine as claimed in claim 1, characterized in that: The inlet end of the pressure sequence chamber (110) is arranged in a cone shape; the pressure sequence chamber (110) and the first air outlet (130) are arranged on the same axis.
3. A portable pilot diaphragm oxygen valve as claimed in claim 1, characterized in that: It also includes a pilot valve (400), which is installed on the upper valve cover (300); the upper valve cover (300) is provided with a pilot valve air inlet hole (410), and the pilot valve air inlet hole (410) is communicated with the second air inlet hole (310).
4. A pilot diaphragm oxygen-generating valve for a portable machine as claimed in claim 3, characterized in that: A diaphragm valve cavity is provided in the valve body (100), and a third air inlet hole (113) is provided on the inner wall of the pressure sequence cavity (110), and the third air inlet hole (113) penetrates into the diaphragm valve cavity.
5. A pilot diaphragm oxygen-generating valve for a portable machine as claimed in claim 4, characterized in that: The diaphragm valve cavity is provided with a second air outlet (141), an exhaust port (142) and a diaphragm valve group; one end of the second air outlet (141) passes through to the outside of the valve body (100), and the other end passes through to the inside of the diaphragm valve cavity; the exhaust port (142) is arranged on the inner wall of the diaphragm valve cavity, and the exhaust port (142) passes through to the outside of the valve body (100); the diaphragm valve group is arranged in the diaphragm valve cavity in a manner that it can be raised or lowered.
6. A portable pilot diaphragm oxygen valve as claimed in claim 5, characterized in that: The pilot valve (400) has an energized state and an off-power state; the lifting stroke of the diaphragm valve group includes an ascending position and a descending position; when the pilot valve (400) is in the energized state, the diaphragm valve group reaches the descending position; when the pilot valve (400) is in the off-power state, the diaphragm valve group reaches the ascending position.