Integrated oxygen outlet valve assembly for handheld oxygen concentrators

Abstract

This utility model discloses an integrated oxygen outlet valve assembly for a handheld oxygen concentrator in the field of oxygen generation equipment. It includes an air duct plate and a valve support. The valve support is equipped with a pulse solenoid valve, an oxygen outlet solenoid valve, and a pressure equalization solenoid valve arranged in an equilateral triangle around the central oxygen outlet. The pulse solenoid valve is located in the channel between the oxygen outlet ends of the two molecular sieve tanks and the oxygen storage tank. The oxygen outlet solenoid valve is located in the channel between the oxygen storage tank and the oxygen outlet. The pressure equalization solenoid valve is located in the channel between the oxygen outlet ends of the two molecular sieve tanks. By integrating the gas passage and solenoid valves using the combination structure of the air duct plate and valve support, and arranging the pulse solenoid valve, oxygen outlet solenoid valve, and pressure equalization solenoid valve in an equilateral triangle around the central oxygen outlet of the valve support, the lateral space of the air duct plate can be fully utilized to achieve gas outlet and pressure equalization of the molecular sieve tanks, as well as oxygen inlet and outlet of the oxygen storage tank. The entire structure is compact, occupies little space, and is conducive to the miniaturization of the oxygen concentrator.

Description

Technical Field

[0001] This utility model relates to the field of oxygen generation equipment, and in particular to an integrated oxygen outlet valve assembly for a handheld oxygen generator. Background Technology

[0002] Most portable oxygen concentrators currently on the market use pressure swing adsorption (PSA) gas separation to produce oxygen. Molecular sieves are the core functional component in this separation process. The principle is that under certain pressure, the molecular sieve adsorbs nitrogen from the air, thus collecting oxygen. When the pressure decreases, the adsorbed nitrogen desorbs, regenerating the molecular sieve. Because most of the nitrogen has been adsorbed, the remaining gas from the molecular sieve tank has a high oxygen content. This gas is collected and stored in an oxygen storage tank for continuous oxygen supply. The process of gas entering the oxygen storage tank from the molecular sieve tank and then supplying oxygen involves many gas ducts and solenoid valves. While there are various types of oxygen concentrators on the market, most of their gas ducts and solenoid valves are scattered and poorly arranged, leading to messy piping and electrical circuits, increased assembly difficulty, wasted space, and hindering the miniaturization of the equipment. Utility Model Content

[0003] To overcome the shortcomings of existing oxygen concentrators, such as insufficient compactness of the oxygen outlet pipeline and solenoid valve, and large space occupation, the technical problem to be solved by this utility model is to provide an integrated oxygen outlet valve assembly for a handheld oxygen concentrator with high integration and small space occupation.

[0004] The technical solution adopted by this utility model to solve its technical problem is: The integrated oxygen outlet valve assembly of a handheld oxygen concentrator includes an air duct plate connecting two molecular sieve tanks and an oxygen storage tank via an internal channel. A valve bracket is located on top of the air duct plate. The valve bracket houses a pulse solenoid valve, an oxygen outlet solenoid valve, and a pressure equalizing solenoid valve arranged in an equilateral triangle around the central oxygen outlet. The pulse solenoid valve is positioned in the channel between the oxygen outlet ends of the two molecular sieve tanks and the oxygen storage tank. The oxygen outlet solenoid valve is positioned in the channel between the oxygen storage tank and the oxygen outlet. The pressure equalizing solenoid valve is positioned in the channel between the oxygen outlet ends of the two molecular sieve tanks. Arranging the three identical solenoid valves in an equilateral triangle is suitable for oxygen concentrator structures with circular or triangular cross-sections, resulting in a compact overall structure. Integrating the three solenoid valves and the channels within a single valve bracket reduces the overall structural thickness, lowering the overall assembly height of the oxygen concentrator. This also facilitates wiring layout, avoids wiring confusion, and improves the convenience of maintenance and repair.

[0005] The valve bracket is a triangular frame structure with connection holes at its three corners. The valve bracket is fixed to the airway plate by screws passing through the connection holes. Screw holes are provided on the three side walls of the valve bracket. The pulse solenoid valve, oxygen outlet solenoid valve, and pressure equalization solenoid valve are fixed to the three side walls of the valve bracket by screws connected to the screw holes. The structure on the valve bracket positions and limits the three solenoid valves, and the whole is integrated with the airway plate to form a modular component.

[0006] The valve support has an oxygen inlet channel in the middle of its bottom surface and an oxygen inlet hole in the first corner of its bottom surface. The valve support has channels a and b on its first side wall. A pulse solenoid valve is installed on the first side wall, with its two ports connected to one end of channel a and one end of channel b, respectively. The other end of channel a is connected to one end of the oxygen inlet channel, and the other end of channel b is connected to one end of the oxygen inlet hole. The other ends of the oxygen inlet channel and the oxygen inlet hole are connected to the molecular sieve tank and the oxygen storage tank, respectively, through a duct plate. By integrating channels inside the valve support, the oxygen entering the oxygen storage tank first enters the internal pressure tank, while the pulse solenoid valve pulses the oxygen from the pressure tank into the oxygen storage tank.

[0007] The valve support has an oxygen outlet channel in the middle of its bottom surface and an air outlet hole in the second corner of its bottom surface. The second side wall of the valve support has channels c and d. The oxygen outlet solenoid valve is installed on the second side wall, with its two ports connected to one end of channel c and one end of channel d, respectively. The other end of channel c is connected to one end of the oxygen outlet channel, and the other end of channel d is connected to one end of the oxygen outlet hole. The other ends of the oxygen outlet channel and the oxygen outlet hole are connected to the oxygen outlet and the oxygen storage tank, respectively. This also realizes the integration of air channels inside the valve support. The oxygen supply in the oxygen storage tank is controlled by the oxygen outlet solenoid valve. Controlling the oxygen outlet solenoid valve can realize oxygen supply modes such as pulse oxygen supply or continuous oxygen supply.

[0008] The valve support has a pressure equalization hole a and a pressure equalization hole b on the triangular part of its bottom surface. The lower ends of pressure equalization holes a and b are connected to the oxygen outlet ends of the two molecular sieve tanks respectively through the air passage plate. The valve support has a channel e and a channel f on its third side wall. The pressure equalization solenoid valve is installed on the third side wall, and its two interfaces are connected to one end of channel e and channel f respectively. The other ends of channel e and channel f are connected to the upper ends of pressure equalization holes a and b respectively. Based on the pressure change in the two molecular sieve tanks, the pressure equalization solenoid valve is used to control the opening and closing of the two molecular sieve tanks to maintain a pressure balance, which is beneficial to maintaining the flow of gas inside the molecular sieve tanks during oxygen production.

[0009] A sealing plate is provided between the bottom surface of the valve support and the top surface of the airway plate. Both the oxygen inlet and outlet channels are grooves set in the bottom surface of the valve support, forming a channel structure with the cooperation of the sealing plate. The structure of grooves and sealing plates can reduce the processing difficulty of the channel structure, save costs, and ensure assembly efficiency and accuracy. It can also reduce the use of external air pipes, and the internal integrated channels can reduce the space occupied by the overall structure, especially the overall structural height.

[0010] Both the molecular sieve tank and the oxygen storage tank are mounted on the bottom surface of the air duct plate. The air duct plate has an oxygen inlet, an air inlet hole, and an air outlet hole running through its upper and lower surfaces. The top surface of the air duct plate has oxygen channel a, oxygen channel b, pressure equalization channel a, and pressure equalization channel b. The lower ends of the two oxygen inlets are respectively connected to the two molecular sieve tanks, and the upper ends are respectively connected to one end of oxygen channel a and oxygen channel b. The other ends of oxygen channel a and oxygen channel b are connected to the oxygen inlet channel. One end of pressure equalization channel a and pressure equalization channel b is connected to oxygen channel a and oxygen channel b, and the other end is connected to the lower end of pressure equalization hole a and pressure equalization hole b, respectively. The lower ends of the air inlet hole and the air outlet hole are connected to the oxygen storage tank, and the upper ends are respectively connected to the oxygen inlet hole and the oxygen outlet hole.

[0011] The beneficial effects of this utility model are: by using the combination structure of airway plate and valve support to integrate the gas channel and solenoid valve together, and arranging the pulse solenoid valve, oxygen outlet solenoid valve and pressure equalization solenoid valve in an equilateral triangle around the oxygen outlet in the middle of the valve support, the lateral space of the airway plate can be fully utilized to realize the gas outlet and pressure equalization of the molecular sieve tank, as well as the oxygen inlet and outlet of the oxygen storage tank. The whole structure is compact, the airway path is short, and the space occupied is small, which is conducive to the miniaturization of oxygen generator. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a top view of the valve bracket of this utility model; Figure 3 This is a bottom view of the valve bracket of this utility model; Figure 4 This is a front view of the overall structure of this utility model; Figure 5 yes Figure 4 AA section view in the middle; Figure 6 yes Figure 4 BB section view in the middle; Figure 7 yes Figure 4 CC section view in the image.

[0013] The diagram is labeled as follows: 1-Airway plate, 2-Molecular sieve tank, 3-Oxygen storage tank, 4-Valve support, 5-Pulse solenoid valve, 6-Oxygen outlet solenoid valve, 7-Equalizing solenoid valve, 8-Sealing plate, 11-Oxygen inlet, 12-Inlet vent, 13-Outlet vent, 14-Oxygen channel a, 15-Oxygen channel b, 16-Equalizing channel a, 17-Equalizing channel b, 41-Oxygen outlet, 42-Connecting hole, 43-Screw hole, 44-Oxygen inlet channel, 45-Oxygen inlet vent, 46-Oxygen outlet channel, 47-Oxygen outlet vent, 48-Equalizing hole a, 49-Equalizing hole b, 401-Channel a, 402-Channel b, 403-Channel c, 404-Channel d, 405-Channel e, 406-Channel f. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] It should be noted that if this utility model contains directional indicators such as up, down, left, right, front, and back, these terms are used to describe the relative positional relationships between components and are not specific references to the absolute positions of the components or the relationships between them. They are only used to explain the relative positional relationships and movement of the components in a specific posture. If the specific posture changes, the directional indicator will also change accordingly. If this utility model contains terms related to quantity such as "many," "multiple," or "several," these terms specifically refer to two or more.

[0016] like Figure 1As shown, the present invention provides an integrated oxygen outlet valve assembly for a handheld oxygen concentrator, comprising an airway plate 1 connecting two molecular sieve tanks 2 and an oxygen storage tank 3 via an internal channel. A valve support 4 is provided on the top of the airway plate 1. The valve support 4 is equipped with a pulse solenoid valve 5, an oxygen outlet solenoid valve 6, and a pressure equalization solenoid valve 7 arranged in an equilateral triangle around the central oxygen outlet 41. The pulse solenoid valve 5 is located in the channel between the oxygen outlet ends of the two molecular sieve tanks 2 and the oxygen storage tank 3. The oxygen outlet solenoid valve 6 is located in the channel between the oxygen storage tank 3 and the oxygen outlet 41. The pressure equalization solenoid valve 7 is located in the channel between the oxygen outlet ends of the two molecular sieve tanks 2. The pulse solenoid valve 5, the oxygen outlet solenoid valve 6, and the pressure equalization solenoid valve 7 are three identical two-position, two-way solenoid valves arranged in an equilateral triangle, suitable for oxygen concentrator structures with circular or triangular cross-sections. This results in a compact overall structure and fully utilizes the lateral space of the airway plate 1 to integrate the airway structure internally, achieving the airway arrangement for oxygen inlet and outlet of the oxygen storage tank 3 and pressure equalization of the molecular sieve tanks 2. In addition, arranging the three solenoid valves together facilitates wiring and avoids wiring confusion, improving the convenience of inspection and maintenance. The overall height is low after arranging the three solenoid valves on the valve bracket 4, which is conducive to reducing the overall structural height. At the same time, the solenoid valves are integrated to form a unit module, realizing integrated assembly.

[0017] like Figure 2 , Figure 3 , Figure 6 As shown, to facilitate the installation of the valve bracket 4 and the three solenoid valves, the valve bracket 4 is a triangular frame structure. The valve bracket 4 has connection holes 42 at its three corners. The valve bracket 4 is fixed to the airway plate 1 by screws passing through the connection holes 42. The valve bracket 4 has screw holes 43 on its three side walls. The pulse solenoid valve 5, the oxygen outlet solenoid valve 6, and the pressure equalization solenoid valve 7 are fixed to the three side walls of the valve bracket 4 by screws connected to the screw holes 43.

[0018] Regarding the air path connection method between the pulse solenoid valve 5 and the air passage plate 1, such as Figure 3 , Figure 7As shown, the valve support 4 has an oxygen inlet channel 44 in the middle of its bottom surface and an oxygen inlet hole 45 at the first corner of its bottom surface. The valve support 4 has channels a401 and b402 on its first side wall. The pulse solenoid valve 5 is located on the first side wall, and its two ports are connected to one end of channel a401 and one end of channel b402, respectively. The other end of channel a401 is connected to one end of the oxygen inlet channel 44 through a drilled hole, and the other end of channel b402 is also connected to one end of the oxygen inlet hole 45 through a drilled hole. The other ends of the oxygen inlet channel 44 and the oxygen inlet hole 45 are connected to the molecular sieve tank 2 and the oxygen storage tank 3, respectively, through the air duct plate 1. Specifically, before the oxygen enters the oxygen storage tank 3, it first enters the pressure reserve tank inside the oxygen storage tank 3. After the oxygen in the pressure reserve tank reaches a certain pressure, the pulse solenoid valve 5 is controlled to start or close in a pulsed manner, so that the oxygen in the pressure reserve tank is injected into the oxygen storage tank 3. The oxygen in the oxygen storage tank 3 can only be output to the user.

[0019] Regarding the airway connection method between the oxygen supply solenoid valve 6 and the airway plate 1, such as... Figure 3 , Figure 7 As shown, the valve support 4 has an oxygen outlet channel 46 in the middle of its bottom surface and an oxygen outlet hole 47 in the second corner of its bottom surface. The valve support 4 has channels c403 and d404 on its second side wall. The oxygen outlet solenoid valve 6 is located on the second side wall, with its two ports connected to one end of channels c403 and d404 respectively. The other end of channel c403 is connected to one end of the oxygen outlet channel 46 through a drilled hole, and the other end of channel d404 is also connected to one end of the oxygen outlet hole 47 through a drilled hole. The other end of the oxygen outlet channel 46 is connected to the oxygen outlet 41 through a drilled hole, and the other end of the oxygen outlet hole 47 is connected to the oxygen storage tank 3 through the airway plate 1. The oxygen outlet solenoid valve 6 is used to realize the oxygen in the oxygen storage tank 3 being ejected from the oxygen outlet 41. By controlling the opening and closing state of the oxygen outlet solenoid valve 6, oxygen delivery in two modes, pulse oxygen supply or continuous oxygen supply, can be realized.

[0020] Regarding the air path connection method between the equalizing solenoid valve 7 and the air passage plate 1, such as Figure 3 , Figure 7 As shown, the triangular portion of the bottom surface of the valve support 4 is provided with equalizing holes a48 and b49. The lower ends of equalizing holes a48 and b49 are connected to the oxygen outlet ends of the two molecular sieve tanks 2 respectively through the gas duct plate 1. The third side wall of the valve support 4 is provided with channels e405 and f406. The equalizing solenoid valve 7 is installed on the third side wall, and its two interfaces are connected to one end of channels e405 and f406 respectively. The other ends of channels e405 and f406 are connected to the upper ends of equalizing holes a48 and b49 respectively.

[0021] To facilitate the installation of the oxygen inlet channel 44 and the oxygen outlet channel 46, a sealing plate 8 is provided between the bottom surface of the valve bracket 4 and the top surface of the airway plate 1. Both the oxygen inlet channel 44 and the oxygen outlet channel 46 are grooves on the bottom surface of the valve bracket 4, forming a channel structure with the cooperation of the sealing plate 8. This groove and sealing plate structure reduces the processing difficulty of the channel structure, saves costs, and ensures assembly efficiency and accuracy.

[0022] Regarding the gas path connection method between the gas duct plate 1 and the molecular sieve tank 2, oxygen storage tank 3, and valve support 4, such as... Figure 1 , Figure 4 , Figure 5 As shown, both the molecular sieve tank 2 and the oxygen storage tank 3 are mounted on the bottom surface of the air duct plate 1. The air duct plate 1 has an oxygen inlet 11, an air inlet 12, and an air outlet 13 penetrating its upper and lower surfaces. The top surface of the air duct plate 1 has an oxygen channel a14, an oxygen channel b15, a pressure equalization channel a16, and a pressure equalization channel b17. The lower ends of the two oxygen inlets 11 are respectively connected to the oxygen outlet ends of the two molecular sieve tanks 2, and the upper ends are respectively connected to the oxygen channels a14 and b17. One end of the duct 5 is connected to the oxygen channel a14 and the other end of the oxygen channel b15 is connected to the oxygen inlet channel 44. One end of the pressure equalization channel a16 and the pressure equalization channel b17 is connected to the oxygen channel a14 and the oxygen channel b15 respectively, and the other end is connected to the lower end of the pressure equalization hole a48 and the pressure equalization hole b49 respectively. The lower end of the air inlet hole 12 and the air outlet hole 13 is connected to the oxygen storage tank 3, and the upper end is connected to the oxygen inlet hole 45 and the oxygen outlet hole 47 respectively. Similarly, for ease of processing, the oxygen channel a14, the oxygen channel b15, the pressure equalization channel a16 and the pressure equalization channel b17 are all groove structures set on the top surface of the airway plate 1, forming a channel structure with the cooperation of the sealing plate 8.

Claims

1. An integrated oxygen outlet valve assembly for a handheld oxygen concentrator, comprising a duct plate (1) connecting two molecular sieve tanks (2) and an oxygen storage tank (3) via an internal channel, characterized in that: The top of the airway plate (1) is provided with a valve support (4). The valve support (4) is provided with a pulse solenoid valve (5), an oxygen outlet solenoid valve (6) and a pressure equalization solenoid valve (7) arranged in an equilateral triangle around the oxygen outlet (41) in the middle. The pulse solenoid valve (5) is set in the channel between the oxygen outlet of the two molecular sieve tanks (2) and the oxygen storage tank (3). The oxygen outlet solenoid valve (6) is set in the channel between the oxygen storage tank (3) and the oxygen outlet (41). The pressure equalization solenoid valve (7) is set in the channel between the oxygen outlet of the two molecular sieve tanks (2).

2. The integrated oxygen outlet valve assembly of the handheld oxygen concentrator as described in claim 1, characterized in that: The valve support (4) is a triangular frame structure. The valve support (4) has connection holes (42) at its three corners. The valve support (4) is fixed to the airway plate (1) by screws passing through the connection holes (42). The valve support (4) has screw holes (43) on its three side walls. The pulse solenoid valve (5), oxygen outlet solenoid valve (6) and pressure equalization solenoid valve (7) are fixed to the three side walls of the valve support (4) by screws connected to the screw holes (43).

3. The integrated oxygen outlet valve assembly of the handheld oxygen concentrator as described in claim 2, characterized in that: The valve support (4) has an oxygen inlet channel (44) in the middle of its bottom surface and an oxygen inlet hole (45) in the first corner of its bottom surface. The valve support (4) has a channel a (401) and a channel b (402) on its first side wall. The pulse solenoid valve (5) is located on the first side wall. Its two ports are connected to one end of the channel a (401) and the channel b (402) respectively. The other end of the channel a (401) is connected to one end of the oxygen inlet channel (44). The other end of the channel b (402) is connected to one end of the oxygen inlet hole (45). The other ends of the oxygen inlet channel (44) and the oxygen inlet hole (45) are connected to the molecular sieve tank (2) and the oxygen storage tank (3) respectively through the airway plate (1).

4. The integrated oxygen outlet valve assembly of the handheld oxygen concentrator as described in claim 3, characterized in that: The valve support (4) has an oxygen outlet channel (46) in the middle of its bottom surface and an oxygen outlet hole (47) in the second corner of its bottom surface. The valve support (4) has a channel c (403) and a channel d (404) on its second side wall. The oxygen outlet solenoid valve (6) is located on the second side wall. Its two ports are connected to one end of the channel c (403) and the channel d (404) respectively. The other end of the channel c (403) is connected to one end of the oxygen outlet channel (46). The other end of the channel d (404) is connected to one end of the oxygen outlet hole (47). The other end of the oxygen outlet channel (46) is connected to the oxygen outlet (41). The other end of the oxygen outlet hole (47) is connected to the oxygen storage tank (3) through the airway plate (1).

5. The integrated oxygen outlet valve assembly of the handheld oxygen concentrator as described in claim 4, characterized in that: The valve support (4) has a pressure equalization hole a (48) and a pressure equalization hole b (49) on the third triangular part of its bottom surface. The lower ends of the pressure equalization holes a (48) and b (49) are connected to the oxygen outlets of the two molecular sieve tanks (2) through the air passage plate (1). The valve support (4) has a channel e (405) and a channel f (406) on its third side wall. The pressure equalization solenoid valve (7) is installed on the third side wall. Its two interfaces are connected to one end of the channel e (405) and the channel f (406) respectively. The other ends of the channel e (405) and the channel f (406) are connected to the upper ends of the pressure equalization holes a (48) and b (49) respectively.

6. The integrated oxygen outlet valve assembly of the handheld oxygen concentrator as described in claim 5, characterized in that: A sealing plate (8) is provided between the bottom surface of the valve support (4) and the top surface of the airway plate (1). The oxygen inlet channel (44) and the oxygen outlet channel (46) are both grooves provided on the bottom surface of the valve support (4), forming a channel structure with the cooperation of the sealing plate (8).

7. The integrated oxygen outlet valve assembly of the handheld oxygen concentrator as described in claim 6, characterized in that: Both the molecular sieve tank (2) and the oxygen storage tank (3) are located on the bottom surface of the air duct plate (1). The air duct plate (1) is provided with an oxygen inlet (11), an air inlet hole (12), and an air outlet hole (13) that run through its upper and lower surfaces. The top surface of the air duct plate (1) is provided with an oxygen channel a (14), an oxygen channel b (15), an equalizing channel a (16), and an equalizing channel b (17). The lower ends of the two oxygen inlets (11) are respectively connected to the oxygen outlet ends of the two molecular sieve tanks (2), and the upper ends are respectively connected to the oxygen channels a (14) and b (15). One end of the oxygen channel a (14) and the oxygen channel b (15) are connected to the oxygen inlet channel (44). One end of the pressure equalization channel a (16) and the pressure equalization channel b (17) are connected to the oxygen channel a (14) and the oxygen channel b (15) respectively, and the other end is connected to the lower end of the pressure equalization hole a (48) and the pressure equalization hole b (49) respectively. The lower end of the air inlet hole (12) and the air outlet hole (13) are connected to the oxygen storage tank (3), and the upper end is connected to the oxygen inlet hole (45) and the oxygen outlet hole (47) respectively.

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