Valve seat structure for portable oxygen generator

Abstract

The valve seat structure comprises a valve seat, a first two-position three-way valve and a second two-position three-way valve, an air inlet pipe, a first air outlet pipe, a second air outlet pipe and a nitrogen discharging pipe are arranged on the valve seat, a first port of the first two-position three-way valve is communicated with the air inlet pipe, and a second port of the second two-position three-way valve is communicated with the nitrogen discharging pipe. A second port of the first two-position three-way valve is communicated with the first air outlet pipe, a third port of the first two-position three-way valve is communicated with the nitrogen discharge pipe, a first port of the second two-position three-way valve is communicated with the air inlet pipe, a second port of the second two-position three-way valve is communicated with the second air outlet pipe, and a third port of the second two-position three-way valve is communicated with the nitrogen discharge pipe. According to the valve seat structure, the function of a two-position five-way valve is achieved through the structure of the valve seat and the two two-position three-way valves, pipeline connection between a compressor and a separating tower can be reduced, noise of the whole machine can be lowered, the occupied space in the portable oxygen generator can be effectively reduced, and possibility is provided for further miniaturization of the portable oxygen generator.

Description

Technical Field

[0001] The invention relates to the field of oxygen concentrators, and in particular to a valve seat structure for a portable oxygen concentrator. Background Art

[0002] A portable oxygen concentrator is a small device designed for users who need oxygen therapy. It provides great convenience to users with its portability, ease of use and stability. It is especially suitable for users who need long-term oxygen therapy or outdoor activities, and can significantly improve the quality of life.

[0003] The connecting pipeline between the compressor and the separation tower of the portable oxygen concentrator currently on the market has the following disadvantages:

[0004] 1) There are many connected pipes, which increases the potential risks of defects, and also increases the material cost, processing cost and assembly labor cost;

[0005] 2) Too many pipes lead to poor cleanliness and unsightly appearance;

[0006] 3) Most pipe materials are made of silicone, which has poor silencing effect;

[0007] 4) More pipes occupy a larger space inside the portable oxygen concentrator, which increases the obstacle to the further miniaturization of the portable oxygen concentrator. Summary of the invention

[0008] The object of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a valve seat structure for a portable oxygen concentrator.

[0009] According to one aspect of the present invention, there is provided a valve seat structure for a portable oxygen concentrator, comprising:

[0010] A valve seat, on which an air inlet pipe, a first air outlet pipe, a second air outlet pipe and a nitrogen exhaust pipe are arranged;

[0011] a first two-position three-way valve, wherein a first port of the first two-position three-way valve is connected to the air inlet pipe, a second port of the first two-position three-way valve is connected to the first air outlet pipe, and a third port of the first two-position three-way valve is connected to the nitrogen exhaust pipe; and

[0012] A second two-position three-way valve, wherein a first port of the second two-position three-way valve is connected to the air inlet pipe, a second port of the second two-position three-way valve is connected to the second air outlet pipe, and a third port of the second two-position three-way valve is connected to the nitrogen exhaust pipe.

[0013] The valve seat structure for a portable oxygen concentrator of the present invention is characterized in that an air inlet pipe is connected to a compressed gas outlet on a compressor in the oxygen concentrator, a first air outlet pipe is connected to an air inlet on a separation tower A in the oxygen concentrator, a second air outlet pipe is connected to an air inlet on a separation tower B in the oxygen concentrator, and a nitrogen exhaust pipe is connected to a nitrogen exhaust port on the oxygen concentrator; when the oxygen concentrator is working, the first port on the first two-position three-way valve is connected to the second port through the control setting of the oxygen concentrator on the first two-position three-way valve, and the compressed gas generated by the compressor in the oxygen concentrator enters the separation tower B through the air inlet pipe, the first port on the first two-position three-way valve, the second port, and the first air outlet pipe. Oxygen and nitrogen are separated in separation tower A. At the same time, the second port and the third port of the second two-way three-way valve are connected by the control setting of the oxygen generator to the second two-way three-way valve, and the nitrogen in separation tower B is released into the atmosphere through the second outlet pipe, the second port and the third port of the second two-way three-way valve, and the nitrogen exhaust pipe to reduce the pressure of the molecular sieve in separation tower B. When the nitrogen adsorbed by the molecular sieve in separation tower A reaches saturation, the second port and the third port of the first two-way three-way valve are connected by the control setting of the oxygen generator to the first two-way three-way valve, and the nitrogen in separation tower A is released into the atmosphere through the first outlet pipe, the first The second port, the third port and the nitrogen exhaust pipe on the two-position three-way valve are released into the atmosphere to reduce the pressure of the molecular sieve in the separation tower A. At the same time, through the control setting of the second two-position three-way valve by the oxygen generator, the first port and the second port on the second two-position three-way valve are connected, and the compressed gas generated by the compressor in the oxygen generator enters the separation tower B through the air inlet pipe, the first port, the second port and the second air outlet pipe on the second two-position three-way valve for separation of oxygen and nitrogen; through the control setting of the first two-position three-way valve and the second two-position three-way valve by the oxygen generator, the oxygen and nitrogen separation in the separation tower A can be achieved in an orderly manner, and the separation tower B can be separated at the same time. B discharges nitrogen - oxygen and nitrogen are separated in separation tower B while separation tower A discharges nitrogen and they work alternately. The valve seat structure of the present invention realizes the function of a two-position five-way valve through the structure of the valve seat and two two-position three-way valves. The structure is simple, can reduce the pipeline connection between the compressor and the separation tower, reduce material costs, reduce assembly, simplify assembly, reduce finished product defects caused by defects in pipelines, joints and components themselves, improve the yield rate, and effectively reduce the noise of the whole machine while reducing materials. At the same time, it can effectively reduce the occupied space inside the portable oxygen concentrator, providing the possibility for further miniaturization of the portable oxygen concentrator.

[0014] Furthermore, the valve seat is provided with a first cavity, a second cavity, a third cavity and a fourth cavity.

[0015] The air inlet pipe is connected to the first cavity, the first air outlet pipe is connected to the second cavity, the second air outlet pipe is connected to the third cavity, and the nitrogen exhaust pipe is connected to the fourth cavity.

[0016] The first port of the first two-position three-way valve is connected to the first cavity, the second port of the first two-position three-way valve is connected to the second cavity, and the third port of the first two-position three-way valve is connected to the fourth cavity.

[0017] The first port of the second two-position three-way valve is communicated with the first cavity, the second port of the second two-position three-way valve is communicated with the third cavity, and the third port of the second two-position three-way valve is communicated with the fourth cavity.

[0018] Therefore, when the oxygen generator is working, the first port and the second port on the first two-position three-way valve are connected through the control setting of the oxygen generator on the first two-position three-way valve, and the compressed gas generated by the compressor in the oxygen generator enters the first cavity through the air inlet pipe, and the compressed gas in the first cavity enters the second cavity through the first port and the second port on the first two-position three-way valve, and the compressed gas in the second cavity enters the separation tower A through the first outlet pipe to separate oxygen and nitrogen. At the same time, through the control setting of the second two-position three-way valve by the oxygen generator, the second port and the third port on the second two-position three-way valve are connected, and the nitrogen in the separation tower B enters the third cavity through the second outlet pipe, and the nitrogen in the third cavity enters the fourth cavity through the second port and the third port on the second two-position three-way valve, and the nitrogen in the fourth cavity is released into the atmosphere through the nitrogen exhaust pipe to reduce the pressure of the molecular sieve in the separation tower B. When the nitrogen adsorbed by the molecular sieve in the separation tower A reaches saturation, the first two The second port on the two-position three-way valve is connected to the third port, the nitrogen in the separation tower A enters the second cavity through the first outlet pipe, the nitrogen in the second cavity enters the fourth cavity through the second port and the third port on the first two-position three-way valve, and the nitrogen in the fourth cavity is released into the atmosphere through the nitrogen exhaust pipe to reduce the pressure of the molecular sieve in the separation tower A. At the same time, through the control setting of the second two-position three-way valve by the oxygen generator, the first port on the second two-position three-way valve is connected to the second port, the compressed gas in the first cavity enters the third cavity through the first port and the second port on the second two-position three-way valve, and the compressed gas in the third cavity enters the separation tower B through the second outlet pipe for separation of oxygen and nitrogen. Through the control setting of the first two-position three-way valve and the second two-position three-way valve by the oxygen generator, oxygen-nitrogen separation in the separation tower A and nitrogen exhaust in the separation tower B can be orderly realized, and the oxygen-nitrogen separation in the separation tower B and nitrogen exhaust in the separation tower A can be realized alternately. The function of the two-position five-way valve is realized through the structure of the valve seat and the two two-position three-way valves.

[0019] Furthermore, the first two-position three-way valve and the second two-position three-way valve are both two-position three-way solenoid valves of model MAC-BV310A.

[0020] Therefore, the MAC-BV310A solenoid valve has a simple structure, fast response, low power consumption, small size, simple structure, and is easy to install and maintain. The structure of two MAC-BV310A solenoid valves plus a valve seat can realize the function of a two-position five-way valve to achieve the connection between the compressor and the separation tower. The formed valve seat structure has a small size and simple structure, which provides the possibility for further miniaturization of the portable oxygen concentrator.

[0021] Furthermore, a first mounting hole and a second mounting hole are provided on the valve seat, the first two-position three-way valve is plugged and fixed in the first mounting hole, and the second two-position three-way valve is plugged and fixed in the second mounting hole.

[0022] A first connecting hole, a second connecting hole and a third connecting hole are provided on the inner wall of the first mounting hole. The first port of the first two-position three-way valve is connected to the first cavity through the first connecting hole, the second port of the first two-position three-way valve is connected to the second cavity through the second connecting hole, and the third port of the first two-position three-way valve is connected to the fourth cavity through the third connecting hole.

[0023] A fourth connecting hole, a fifth connecting hole and a sixth connecting hole are provided on the inner wall of the second mounting hole, the first port of the second two-position three-way valve is connected to the first cavity through the fourth connecting hole, the second port of the second two-position three-way valve is connected to the third cavity through the fifth connecting hole, and the third port of the second two-position three-way valve is connected to the fourth cavity through the sixth connecting hole.

[0024] Therefore, the assembly and disassembly of the first two-position three-way valve and the second two-position three-way valve are very simple. As long as the first two-position three-way valve is plugged and fixed in the first mounting hole and the second two-position three-way valve is plugged and fixed in the second mounting hole, the connection with the valve seat can be achieved to realize the function of the two-position five-way valve.

[0025] Furthermore, the second cavity and the third cavity are respectively located on both sides of the first cavity, and the second cavity and the third cavity are respectively located on both sides of the fourth cavity.

[0026] Therefore, the second cavity and the third cavity are arranged symmetrically with respect to the first cavity and the fourth cavity, ensuring that the path of the compressed gas in the air inlet pipe entering the separation tower A is consistent with the path entering the separation tower B, and also ensuring that the nitrogen exhaust path of the nitrogen in the separation tower A is consistent with the nitrogen exhaust path of the nitrogen in the separation tower B, thereby ensuring the stability of the oxygen generator.

[0027] Furthermore, the valve seat comprises a base and a cover.

[0028] The first cavity, the second cavity, the third cavity and the fourth cavity are all arranged on the base, the cover body is covered on the base to cover the first cavity, the second cavity, the third cavity and the fourth cavity, the first mounting hole, the second mounting hole, the air intake pipe and the nitrogen exhaust pipe are all arranged on the base,

[0029] The first air outlet pipe and the second air outlet pipe are both arranged on the cover body.

[0030] Therefore, the valve seat is formed by assembling the base and the cover body, which is convenient for processing and forming. Moreover, after the cover body is removed from the base, the first cavity, the second cavity, the third cavity, the fourth cavity, the air intake pipe and the nitrogen exhaust pipe on the base can be cleaned and maintained.

[0031] Furthermore, it also includes a sealing gasket, a first sealing groove is provided on the end surface of the base facing the cover body, the first sealing groove is arranged around the periphery of the ports of the first cavity, the second cavity, the third cavity and the fourth cavity, a second sealing groove matching the first sealing groove is provided on the end surface of the cover body facing the base, and the shape of the sealing gasket matches the shape of the first sealing groove,

[0032] When the cover body is covered on the base, half of the sealing gasket in the thickness direction is accommodated in the first sealing groove, and the other half of the sealing gasket in the thickness direction is accommodated in the second sealing groove.

[0033] Therefore, the sealing gasket can respectively improve the sealing between the first cavity, the second cavity, the third cavity, the fourth cavity and the cover body to prevent gas leakage.

[0034] Furthermore, two recesses are arranged on the end surface of the base facing the cover body, and two convex columns respectively adapted to the two recesses are arranged on the end surface of the cover body facing the base, and the two convex columns are respectively inserted into the two recesses.

[0035] Therefore, when assembling the base and the cover body, the sealing gasket is first placed in the first sealing groove, and then the two protrusions on the cover body are respectively inserted into the two recesses on the base to ensure that the sealing gasket is simultaneously placed in the first sealing groove and the second sealing groove, so that the base, the sealing gasket and the cover body can be quickly assembled together.

[0036] Furthermore, the cover body and the base are connected by screws.

[0037] Therefore, the cover body and the base can be firmly assembled together by screws, ensuring the sealing between the first cavity, the second cavity, the third cavity, the fourth cavity and the cover body.

[0038] Furthermore, a first through hole and a second through hole are provided on the cover body, one end of the first through hole is connected to the first air outlet pipe, the other end of the first through hole is connected to the second cavity, one end of the second through hole is connected to the second air outlet pipe, and the other end of the second through hole is connected to the third cavity.

[0039] Therefore, after the cover body is removed from the base, the first air outlet pipe and the second air outlet pipe on the cover body can be cleaned and maintained, which is very convenient. Moreover, such a design can also make the first air outlet pipe and the second air outlet pipe staggered in space with the nitrogen exhaust pipe, which is convenient for the valve seat structure to be connected with the separation tower and the nitrogen exhaust port on the oxygen generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of a valve seat structure for a portable oxygen concentrator of the present invention;

[0041] Figure 2 for Figure 1 The schematic diagram of the split structure of the valve seat structure shown;

[0042] Figure 3 for Figure 1 A schematic diagram of the split structure of the valve seat structure from another perspective is shown;

[0043] Figure 4 for Figure 2 The valve seat structure shown is a schematic diagram of the structure behind the hidden line of the valve seat;

[0044] Figure 5 for Figure 2 A schematic structural diagram of the valve seat in the valve seat structure shown in FIG. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0046] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, unless otherwise specified, "multiple" means two or more; it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or a connection between the two elements.

[0047] See also Figures 1 to 5 A valve seat structure for a portable oxygen concentrator comprises a valve seat 1, a first two-position three-way valve 2, a second two-position three-way valve 3 and a sealing gasket 4.

[0048] See also Figure 1 The valve seat 1 is provided with an air inlet pipe 11, a first air outlet pipe 12, a second air outlet pipe 13 and a nitrogen exhaust pipe 14. The first two-position three-way valve 2 and the second two-position three-way valve 3 are both installed on the valve seat 1. Specifically, refer to 2 to Figure 5 The valve seat 1 includes a base 101 and a cover body 102, and the cover body 102 is covered on the base 101. The base 101 is formed with an air inlet pipe 11 and a nitrogen exhaust pipe 14, and the air inlet pipe 11 and the nitrogen exhaust pipe 14 are respectively located at the two ends of the base 101. The first two-position three-way valve 2 and the second two-position three-way valve 3 are both installed on the base 101, and the cover body 102 is formed with a first air outlet pipe 12 and a second air outlet pipe 13, and the first air outlet pipe 12 and the second air outlet pipe 13 are both located on the same side of the cover body 102 and arranged in parallel.

[0049] See also Figures 2 to 5 The base 101 is formed with a first cavity 15, a second cavity 16, a third cavity 17 and a fourth cavity 18. The first cavity 15, the second cavity 16, the third cavity 17 and the fourth cavity 18 are all open. The second cavity 16 and the third cavity 17 are respectively located on both sides of the first cavity 15, and the second cavity 16 and the third cavity 17 are respectively located on both sides of the fourth cavity 18. The second cavity 16 and the third cavity 17 are symmetrically arranged with respect to the first cavity 15, and the second cavity 16 and the third cavity 17 are symmetrically arranged with respect to the fourth cavity 18. The air intake pipe 11 is symmetrically arranged with respect to the first cavity 15, and the air intake pipe 11 is symmetrically arranged with respect to the third cavity 17. The first cavity 15 is connected, the nitrogen exhaust pipe 14 is connected to the fourth cavity 18, the cover body 102 is covered on the base 101 to cover the first cavity 15, the second cavity 16, the third cavity 17, and the fourth cavity 18, and the cover body 102 is formed with a first through hole 1023 and a second through hole 1024, one end of the first through hole 1023 is connected to the first air outlet pipe 12, the other end of the first through hole 1023 is connected to the second cavity 16, one end of the second through hole 1024 is connected to the second air outlet pipe 13, and the other end of the second through hole 1024 is connected to the third cavity 17.

[0050] See also Figures 2 to 5The base 101 is formed with a first mounting hole 19 and a second mounting hole 110, the first two-position three-way valve 2 is plugged and fixed in the first mounting hole 19, and the second two-position three-way valve 3 is plugged and fixed in the second mounting hole 110, the first mounting hole 19 and the second mounting hole 110 are respectively located on both sides of the intake pipe 11, and the inner wall of the first mounting hole 19 is formed with a first connecting hole 191, a second connecting hole 192 and a third connecting hole 193, and the first port of the first two-position three-way valve 2 is connected to the first chamber through the first connecting hole 191. The first two-position three-way valve 2 is connected to the air intake pipe 11 through the first connecting hole 191 and the first cavity 15, the second port of the first two-position three-way valve 2 is connected to the second cavity 16 through the second connecting hole 192, and the third port of the first two-position three-way valve 2 is connected to the fourth cavity 18 through the third connecting hole 193, that is, the first port of the first two-position three-way valve 2 is connected to the air intake pipe 11 through the first connecting hole 191 and the first cavity 15, and the second port of the first two-position three-way valve 2 is connected to the air intake pipe 11 through the second connecting hole 192, the second cavity 16, and the first through hole 1023 on the cover body 102. The first outlet pipe 12 is connected, the third port of the first two-position three-way valve 2 is connected to the nitrogen exhaust pipe 14 through the third connecting hole 193 and the fourth cavity 18, the inner wall of the second mounting hole 110 is formed with a fourth connecting hole 111, a fifth connecting hole 112 and a sixth connecting hole 113, the first port of the second two-position three-way valve 3 is connected to the first cavity 15 through the fourth connecting hole 111, the second port of the second two-position three-way valve 3 is connected to the third cavity 17 through the fifth connecting hole 112, and the first port of the second two-position three-way valve 3 is connected to the third cavity 17 through the fifth connecting hole 112. The three ports are connected to the fourth cavity 18 through the sixth connecting hole 113, that is, the first port of the second two-position three-way valve 3 is connected to the air inlet pipe 11 through the fourth connecting hole 111 and the first cavity 15, the second port of the second two-position three-way valve 3 is connected to the second air outlet pipe 13 on the cover body 102 through the fifth connecting hole 112, the third cavity 17, and the second through hole 1024 on the cover body 102, and the third port of the second two-position three-way valve 3 is connected to the nitrogen exhaust pipe 14 through the sixth connecting hole 113 and the fourth cavity 18.

[0051] See also Figure 2 and Figure 3In this embodiment, the first two-position three-way valve 2 and the second two-position three-way valve 3 both adopt a two-position three-way solenoid valve of model MAC-BV310A. The MAC-BV310A solenoid valve has a simple structure, fast response, low power consumption, small size, simple structure, and is easy to install and maintain. The structure of two MAC-BV310A solenoid valves plus a valve seat 1 can realize the function of a two-position five-way valve to realize the connection between the compressor and the separation tower on the oxygen concentrator. The formed valve seat structure has a small size and a simple structure, which provides the possibility for further miniaturization of the portable oxygen concentrator. Through the control setting of the first two-position three-way valve 2 by the oxygen concentrator, the first port on the first two-position three-way valve 2 is connected to the second port, the compressed gas generated by the compressor in the oxygen concentrator enters the first cavity 15 through the air inlet pipe 11, the compressed gas in the first cavity 15 enters the second cavity 16 through the first port and the second port on the first two-position three-way valve 2, and the compressed gas in the second cavity 16 enters the separation tower A of the oxygen concentrator through the first through hole 1023 on the cover body 102 and the first air outlet pipe 12 to separate oxygen and nitrogen. At the same time, through the control setting of the second two-position three-way valve 3 by the oxygen concentrator, The second port on the second two-position three-way valve 3 is connected to the third port, and the nitrogen in the separation tower B of the oxygen generator (at this time, the nitrogen adsorbed by the molecular sieve in the separation tower B of the oxygen generator reaches saturation and needs to be discharged. The nitrogen discharge time point can be set by setting the power-on and power-off time of the second two-position three-way valve 3) enters the third cavity 17 through the second gas outlet pipe 13 and the second through hole 1024 on the cover body 102, and the nitrogen in the third cavity 17 enters the fourth cavity 18 through the second port and the third port on the second two-position three-way valve 3. The nitrogen in the fourth cavity 18 passes through the nitrogen discharge pipe 14 and the nitrogen discharge port on the oxygen generator. Released into the atmosphere to reduce the pressure of the molecular sieve in the separation tower B; when the nitrogen adsorbed by the molecular sieve in the separation tower A of the oxygen generator reaches saturation (which can be set by setting the power-on and power-off time of the first two-position three-way valve 2), the second port on the first two-position three-way valve 2 is connected to the third port through the control setting of the oxygen generator on the first two-position three-way valve 2, and the nitrogen in the separation tower A of the oxygen generator enters the second cavity 16 through the first gas outlet pipe 12 and the first through hole 1023 on the cover body 102, and the nitrogen in the second cavity 16 enters the fourth cavity through the second port and the third port on the first two-position three-way valve 2. In the body 18, the nitrogen in the fourth cavity 18 is released into the atmosphere through the nitrogen exhaust pipe 14 and the nitrogen exhaust port on the oxygen generator to reduce the pressure of the molecular sieve in the separation tower A. At the same time, through the control setting of the second two-position three-way valve 3 by the oxygen generator, the first port and the second port on the second two-position three-way valve 3 are connected, and the compressed gas in the first cavity 15 enters the third cavity 17 through the first port and the second port on the second two-position three-way valve 3. The compressed gas in the third cavity 17 enters the separation tower B of the oxygen generator through the second through hole 1024 on the cover body 102 and the second gas outlet pipe 13 to separate oxygen and nitrogen;Through the control setting (power-on and power-off time) of the first two-position three-way valve 2 and the second two-position three-way valve 3 by the oxygen concentrator, the oxygen-nitrogen separation in the separation tower A and the nitrogen discharge in the separation tower B can be realized in an orderly manner, and the oxygen-nitrogen separation in the separation tower B and the nitrogen discharge in the separation tower A can be realized in an alternating manner. The function of the two-position five-way valve is realized by the structure of the valve seat 1 and the two two-position three-way valves. The working modes of the first two-position three-way valve 2 and the second two-position three-way valve 3 can be preset by the oxygen concentrator. In addition, since the second cavity 16 and the third cavity 17 are symmetrically arranged with respect to the first cavity 15 and the fourth cavity 18, Ensure that the path of the compressed gas in the air inlet pipe 11 entering the separation tower A of the oxygen concentrator is consistent with the path entering the separation tower B, and also ensure that the nitrogen discharge path of the nitrogen in the separation tower A of the oxygen concentrator is consistent with the nitrogen discharge path of the nitrogen in the separation tower B, thereby ensuring the stability of the operation of the oxygen concentrator. Moreover, the first two-position three-way valve 2 and the second two-position three-way valve 3 are very simple to assemble and disassemble. As long as the first two-position three-way valve 2 is plugged and fixed in the first mounting hole 19 and the second two-position three-way valve 3 is plugged and fixed in the second mounting hole 110, the connection with the valve seat 1 can be realized to realize the function of the two-position five-way valve. ;

[0052] See also Figure 2 and Figure 3 A first sealing groove 1011 is formed on the end surface of the base 101 facing the cover body 102, and the first sealing groove 1011 is arranged around the periphery of the ports of the first cavity 15, the second cavity 16, the third cavity 17, and the fourth cavity 18. The first sealing groove 1011 is in a closed state, and a second sealing groove 1021 adapted to the first sealing groove 1011 is formed on the end surface of the cover body 102 facing the base 101, and the second sealing groove 1021 is in a closed state. The shape of the sealing gasket 4 is adapted to the shapes of the first sealing groove 1011 and the second sealing groove 1021. When the cover body 102 is covered on the base 101, half of the sealing gasket 4 in the thickness direction is accommodated in the first sealing groove 1011, and the other half of the sealing gasket 4 in the thickness direction is accommodated in the second sealing groove 1021. The sealing gasket 4 can respectively improve the sealing between the first cavity 15, the second cavity 16, the third cavity 17, the fourth cavity 18 and the cover body 102 to prevent gas leakage.

[0053] See also Figure 2 and Figure 3Two recesses 1012 are formed on the end surface of the base 101 facing the cover body 102, and two bosses 1022 that are respectively adapted to the two recesses 1012 are formed on the end surface of the cover body 102 facing the base 101. The two bosses 1022 are respectively inserted into the two recesses 1012. When assembling the base 101 and the cover body 102, the sealing gasket 4 is first accommodated in the first sealing groove 1011, and then the two bosses 1022 on the cover body 102 are respectively inserted into the two recesses 1012 on the base 101 to ensure that the sealing gasket 4 is accommodated in the first sealing groove 1011 and the second sealing groove 1021 at the same time, so that the base 101, the sealing gasket 4 and the cover body 102 can be quickly assembled together.

[0054] The cover 102 is connected to the base 101 by screws (not shown), and the cover 102 and the base 101 can be firmly assembled together by screws to ensure the sealing between the first cavity 15, the second cavity 16, the third cavity 17, the fourth cavity 18 and the cover 101. The valve seat 1 is formed by assembling the base 101 and the cover 102, which is convenient for processing and molding. Moreover, after the cover 102 is removed from the base 101, the first cavity 15, the second cavity 16, the third cavity 17, the fourth cavity 18, the intake pipe 11 and the nitrogen exhaust pipe on the base 101 can be 14 is cleaned and maintained. After the cover body 102 is removed from the base 101, the first air outlet pipe 12 and the second air outlet pipe 13 on the cover body 102 can be cleaned and maintained, which is very convenient. Moreover, since the first air outlet pipe 12 on the cover body 102 is connected with the second cavity 16 through the first through hole 1023, and the second air outlet pipe 13 is connected with the third cavity 17 through the second through hole 1024, such a design can make the first air outlet pipe 12 and the second air outlet pipe 13 staggered in space with the nitrogen exhaust pipe 14, which is convenient for the valve seat structure to be connected with the separation tower and the nitrogen exhaust port on the oxygen generator.

[0055] See also Figures 1 to 5The valve seat structure for a portable oxygen concentrator of the present invention comprises an air inlet pipe 11 connected to the compressed gas outlet of the compressor in the oxygen concentrator, a first air outlet pipe 12 connected to the air inlet of the separation tower A in the oxygen concentrator, and a second air outlet pipe 13 connected to the air inlet of the separation tower B in the oxygen concentrator; when the oxygen concentrator is working, the first port on the first two-position three-way valve 2 is connected to the second port through the control setting of the oxygen concentrator on the first two-position three-way valve 2, and the compressed gas generated by the compressor in the oxygen concentrator passes through the air inlet pipe 11, the first cavity 15, the first port on the first two-position three-way valve 2, the second port, the second cavity 16, the first through hole 1023, and the first air outlet pipe 12 to enter the separation tower A for separation of oxygen and nitrogen, and at the same time, the oxygen concentrator passes through the first two-position three-way valve 2. The control setting of the second two-position three-way valve 3 is such that the second port on the second two-position three-way valve 3 is connected to the third port, and the nitrogen in the separation tower B is released into the atmosphere through the second outlet pipe 13, the second through hole 1024, the third cavity 17, the second port on the second two-position three-way valve 3, the third port, the fourth cavity 18, the nitrogen exhaust pipe 14, and the nitrogen exhaust port on the oxygen generator to reduce the pressure of the molecular sieve in the separation tower B; when the nitrogen adsorbed by the molecular sieve in the separation tower A of the oxygen generator reaches saturation, the control setting of the first two-position three-way valve 2 by the oxygen generator is such that the second port on the first two-position three-way valve 2 is connected to the third port, and the nitrogen in the separation tower A is released into the atmosphere through the first outlet pipe 12, the first through hole 1023, the second cavity 16, the first two-position three-way valve 2, the third port, the fourth cavity 18, the nitrogen exhaust pipe 14, and the nitrogen exhaust port on the oxygen generator. The second port, the third port, the fourth cavity 18, the nitrogen exhaust pipe 14, and the nitrogen exhaust port on the valve 2 are released into the atmosphere to reduce the pressure of the molecular sieve in the separation tower A. At the same time, the first port on the second two-position three-way valve 3 is connected to the second port through the control setting of the oxygen concentrator on the second two-position three-way valve 3, and the compressed gas generated by the compressor in the oxygen concentrator enters the separation tower B through the air inlet pipe 11, the first cavity 15, the first port on the second two-position three-way valve 3, the second port, the third cavity 17, the second through hole 1024, and the second air outlet pipe 13 to separate oxygen and nitrogen; the control setting of the first two-position three-way valve 2 and the second two-position three-way valve 3 by the oxygen concentrator (specifically: the first two-position three-way valve 2, the second two-position three-way valve 3 can be set The valve seat structure of the present invention realizes the function of a two-position five-way valve through the structure of the valve seat 1 and two two-position three-way valves, and has a simple structure. It can reduce the pipeline connection between the compressor and the separation tower in the oxygen concentrator, reduce material costs, reduce assembly, simplify assembly, reduce finished product defects caused by defects in pipelines, joints and components themselves, and improve the yield rate. Moreover, while reducing materials, it effectively reduces the noise of the oxygen concentrator. At the same time, it can effectively reduce the occupied space inside the portable oxygen concentrator, and provide the possibility for further miniaturization of the portable oxygen concentrator.

[0056] The above are only some embodiments of the present invention, which are intended to illustrate the technical means of the present invention, but not to limit the technical scope of the present invention. Those skilled in the art can make obvious improvements to the present invention in combination with existing common knowledge, which all fall within the protection scope of the present invention.

Claims

1. A valve seat structure for a portable oxygen concentrator, characterized in that: include: A valve seat, on which an air inlet pipe, a first air outlet pipe, a second air outlet pipe and a nitrogen exhaust pipe are arranged; a first two-position three-way valve, wherein a first port of the first two-position three-way valve is connected to an air inlet pipe, a second port of the first two-position three-way valve is connected to a first air outlet pipe, and a third port of the first two-position three-way valve is connected to a nitrogen exhaust pipe; and A second two-position three-way valve, wherein the first port of the second two-position three-way valve is connected to the air inlet pipe, the second port of the second two-position three-way valve is connected to the second air outlet pipe, and the third port of the second two-position three-way valve is connected to the nitrogen exhaust pipe.

2. The valve seat structure according to claim 1, characterized in that: The valve seat is provided with a first cavity, a second cavity, a third cavity and a fourth cavity. The air inlet pipe is connected to the first cavity, the first air outlet pipe is connected to the second cavity, the second air outlet pipe is connected to the third cavity, and the nitrogen exhaust pipe is connected to the fourth cavity. The first port of the first two-position three-way valve is connected to the first cavity, the second port of the first two-position three-way valve is connected to the second cavity, and the third port of the first two-position three-way valve is connected to the fourth cavity. The first port of the second two-position three-way valve is communicated with the first cavity, the second port of the second two-position three-way valve is communicated with the third cavity, and the third port of the second two-position three-way valve is communicated with the fourth cavity.

3. The valve seat structure according to claim 2, characterized in that: The first two-position three-way valve and the second two-position three-way valve are both two-position three-way solenoid valves of model MAC-BV310A.

4. The valve seat structure according to claim 3, characterized in that: The valve seat is provided with a first mounting hole and a second mounting hole, the first two-position three-way valve is plugged and fixed in the first mounting hole, and the second two-position three-way valve is plugged and fixed in the second mounting hole. The inner wall of the first mounting hole is provided with a first connecting hole, a second connecting hole and a third connecting hole, the first port of the first two-position three-way valve is connected to the first cavity through the first connecting hole, the second port of the first two-position three-way valve is connected to the second cavity through the second connecting hole, and the third port of the first two-position three-way valve is connected to the fourth cavity through the third connecting hole. A fourth connecting hole, a fifth connecting hole and a sixth connecting hole are provided on the inner wall of the second mounting hole, the first port of the second two-position three-way valve is connected to the first cavity through the fourth connecting hole, the second port of the second two-position three-way valve is connected to the third cavity through the fifth connecting hole, and the third port of the second two-position three-way valve is connected to the fourth cavity through the sixth connecting hole.

5. The valve seat structure according to claim 2, characterized in that: The second cavity and the third cavity are respectively located on two sides of the first cavity, and the second cavity and the third cavity are respectively located on two sides of the fourth cavity.

6. The valve seat structure according to claim 4, characterized in that: The valve seat comprises a base and a cover. The first cavity, the second cavity, the third cavity and the fourth cavity are all arranged on the base, the cover body is covered on the base to cover the first cavity, the second cavity, the third cavity and the fourth cavity, the first mounting hole, the second mounting hole, the air intake pipe and the nitrogen exhaust pipe are all arranged on the base, The first air outlet pipe and the second air outlet pipe are both arranged on the cover body.

7. The valve seat structure according to claim 6, characterized in that: It also includes a sealing gasket, wherein a first sealing groove is arranged on the end surface of the base facing the cover body, the first sealing groove is arranged around the periphery of the ports of the first cavity, the second cavity, the third cavity and the fourth cavity, and a second sealing groove matching the first sealing groove is arranged on the end surface of the cover body facing the base, and the shape of the sealing gasket matches the shape of the first sealing groove. When the cover body is covered on the base, half of the sealing gasket in the thickness direction is accommodated in the first sealing groove, and the other half of the sealing gasket in the thickness direction is accommodated in the second sealing groove.

8. The valve seat structure according to claim 7, characterized in that: Two recesses are arranged on the end surface of the base facing the cover body, and two convex columns respectively matched with the two recesses are arranged on the end surface of the cover body facing the base, and the two convex columns are respectively inserted in the two recesses.

9. The valve seat structure according to claim 8, characterized in that: The cover body is connected to the base through screws.

10. The valve seat structure according to claim 6, characterized in that: The cover body is provided with a first through hole and a second through hole, one end of the first through hole is connected to the first air outlet pipe, the other end of the first through hole is connected to the second cavity, one end of the second through hole is connected to the second air outlet pipe, and the other end of the second through hole is connected to the third cavity.

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