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 valve seat structure 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 utility model relates to the field of oxygen generator, especially a valve seat structure for portable oxygen generator. BACKGROUND

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

[0003] The connecting pipeline between the compressor and the separation tower of the portable oxygen generator on the existing market has the following shortcomings:

[0004] 1) The connected pipeline is more, which increases the adverse hidden troubles, and increases the material cost, processing cost and assembly labor cost;

[0005] 2) The more pipelines result in poor neatness and less aesthetics;

[0006] 3) The pipeline material is mostly silica gel, which has poor sound insulation effect;

[0007] 4) The more pipelines occupy a large space inside the portable oxygen generator, which increases the hindrance for further miniaturization of the portable oxygen generator. SUMMARY

[0008] The utility model aims at overcoming the above-mentioned deficiencies of the prior art, and provides a valve seat structure for portable oxygen generator.

[0009] According to one aspect of the utility model, a valve seat structure for portable oxygen generator is provided, which comprises:

[0010] The valve seat is provided with an air inlet pipe, a first air outlet pipe, a second air outlet pipe and a nitrogen discharge pipe, the first air outlet pipe is provided with a first sealing ring, the second air outlet pipe is provided with a second sealing ring, and the nitrogen discharge pipe is provided with a third sealing ring;

[0011] A first two-position three-way valve, a second two-position three-way valve, a third two-position three-way valve and a fourth two-position three-way valve are arranged on the valve seat.

[0012] The first two-position three-way valve is provided with a first port, a second port and a third port, the first port is communicated with the air inlet pipe, the second port is communicated with the first air outlet pipe, and the third port is communicated with the nitrogen discharge pipe.

[0013] The utility model discloses a valve seat structure for portable oxygen generator, and the compressed gas outlet on the compressor in the oxygen generator is connected with the air inlet pipe, the first air outlet pipe is connected with the air inlet on the separation tower A in the oxygen generator, the first sealing ring can ensure the sealing property between the first air outlet pipe and the air inlet on the separation tower A in the oxygen generator, the second air outlet pipe is connected with the air inlet on the separation tower B in the oxygen generator, the second sealing ring can ensure the sealing property between the second air outlet pipe and the air inlet on the separation tower B in the oxygen generator, the nitrogen outlet on the oxygen generator is connected with the nitrogen outlet pipe, and the third sealing ring can ensure the sealing property between the nitrogen outlet pipe and the nitrogen outlet on the oxygen generator, when the oxygen generator works, through the control setting of the oxygen generator to the first two -way three -way valve, the first port and the second port on the first two -way three -way valve are conducted, and the compressed gas generated by the compressor in the oxygen generator enters the separation tower A through the air inlet pipe, the first port, the second port on the first two -way three -way valve and the first air outlet pipe and separates oxygen and nitrogen, simultaneously, through the control setting of the oxygen generator to the second two -way three -way valve, the second port and the third port on the second two -way three -way valve are conducted, and the nitrogen in the separation tower B is released to the atmosphere through the second air outlet pipe, the second port, the third port on the second two -way three -way valve and the nitrogen outlet 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, through the control setting of the oxygen generator to the first two -way three -way valve, the second port and the third port on the first two -way three -way valve are conducted, and the nitrogen in the separation tower A is released to the atmosphere through the first air outlet pipe, the second port, the third port on the first two -way three -way valve and the nitrogen outlet pipe to reduce the pressure of the molecular sieve in the separation tower A, simultaneously, through the control setting of the oxygen generator to the second two -way three -way valve, the first port and the second port on the second two -way three -way valve are conducted, 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 on the second two -way three -way valve and the second air outlet pipe and separates oxygen and nitrogen, through the control setting of the oxygen generator to the first two -way three -way valve and the second two -way three -way valve, the oxygen and nitrogen separation in the separation tower A and the nitrogen release-separation of oxygen and nitrogen in the separation tower B and the nitrogen release in the separation tower A can be realized orderly and alternately, the valve seat structure of the utility model realizes the function of two -way five -way valve through the structure of valve seat and two two -way three -way valves, and the structure is simple, can reduce the pipeline connection between the compressor and the separation tower, reduce material cost, reduce assembly, make assembly simple, reduce the finished product bad caused by pipeline, joint and component itself, improve the good product rate, and reduce the material, effectively reduce the whole machine noise, can effectively reduce the occupation space in the portable oxygen generator, provide the possibility for the further miniaturization of portable oxygen generator.

[0014] Further, 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 communicated with the first cavity, the first air outlet pipe is communicated with the second cavity, the second air outlet pipe is communicated with the third cavity, and the nitrogen discharge pipe is communicated with the fourth cavity,

[0016] The first port of the first two-position three-way valve is communicated with the first cavity, the second port of the first two-position three-way valve is communicated with the second cavity, and the third port of the first two-position three-way valve is communicated with 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 works, through the control setting of the oxygen generator on the first two-position three-way valve, the first port and the second port of the first two-position three-way valve are connected, the compressed gas generated by the compressor in the oxygen generator enters the first cavity through the air inlet pipe, the compressed gas in the first cavity enters the second cavity through the first port and the second port of the first two-position three-way valve, the compressed gas in the second cavity enters the separation tower A through the first air outlet pipe to separate oxygen and nitrogen, at the same time, through the control setting of the oxygen generator on the second two-position three-way valve, the second port and the third port of the second two-position three-way valve are connected, the nitrogen in the separation tower B enters the third cavity through the second air outlet pipe, the nitrogen in the third cavity enters the fourth cavity through the second port and the third port of the second two-position three-way valve, and the nitrogen in the fourth cavity is released to the atmosphere through the nitrogen discharge 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, through the control setting of the oxygen generator on the first two-position three-way valve, the second port and the third port of the first two-position three-way valve are connected, the nitrogen in the separation tower A enters the second cavity through the first air outlet pipe, the nitrogen in the second cavity enters the fourth cavity through the second port and the third port of the first two-position three-way valve, and the nitrogen in the fourth cavity is released to the atmosphere through the nitrogen discharge pipe to reduce the pressure of the molecular sieve in the separation tower A, at the same time, through the control setting of the oxygen generator on the second two-position three-way valve, the first port and the second port of the second two-position three-way valve are connected, the compressed gas in the first cavity enters the third cavity through the first port and the second port of the second two-position three-way valve, the compressed gas in the third cavity enters the separation tower B through the second air outlet pipe to separate oxygen and nitrogen, through the control setting of the oxygen generator on the first two-position three-way valve and the second two-position three-way valve, the separation of oxygen and nitrogen in the separation tower A and the discharge of nitrogen in the separation tower B can be realized in order, and the function of a two-position five-way valve is realized through the structure of the valve seat and the two two-position three-way valves.

[0019] Further, the first two-position three-way valve and the second two-position three-way valve both adopt a two-position three-way electromagnetic valve with a model of MAC-BV310A.

[0020] Therefore, the MAC-BV310A electromagnetic valve has simple structure, fast response, low power consumption, small size, simple structure, easy installation and maintenance, and the structure of the two MAC-BV310A electromagnetic valves plus valve seats can realize the function of a two-position five-way valve to realize the connection between the compressor and the separation tower, and the valve seat structure has small size and simple structure, which provides the possibility for further miniaturization of the portable oxygen generator.

[0021] Further, the valve seat is provided with a first mounting hole and a second mounting hole, a first two-position three-way valve is inserted and fixed in the first mounting hole, and a second two-position three-way valve is inserted and fixed in the second mounting hole,

[0022] The inner wall of the first mounting hole is provided with a first communication hole, a second communication hole and a third communication hole, the first port of the first two-position three-way valve communicates with the first cavity through the first communication hole, the second port of the first two-position three-way valve communicates with the second cavity through the second communication hole, and the third port of the first two-position three-way valve communicates with the fourth cavity through the third communication hole,

[0023] The inner wall of the second mounting hole is provided with a fourth communication hole, a fifth communication hole and a sixth communication hole, the first port of the second two-position three-way valve communicates with the first cavity through the fourth communication hole, the second port of the second two-position three-way valve communicates with the third cavity through the fifth communication hole, and the third port of the second two-position three-way valve communicates with the fourth cavity through the sixth communication hole.

[0024] Therefore, the first two-position three-way valve and the second two-position three-way valve are very easy to assemble and disassemble, and as long as the first two-position three-way valve is inserted and fixed in the first mounting hole and the second two-position three-way valve is inserted and fixed in the second mounting hole, the connection with the valve seat can be realized to realize the function of a two-position five-way valve.

[0025] Further, 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 symmetrically arranged with respect to the first cavity and the fourth cavity, which ensures that the paths of the compressed gas in the air inlet pipe entering the separation tower A and entering the separation tower B remain consistent, and also ensures that the nitrogen discharge paths of the nitrogen in the separation tower A and the nitrogen discharge paths of the nitrogen in the separation tower B remain consistent, thereby ensuring the stability of the oxygen generator.

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

[0028] The first cavity, the second cavity, the third cavity and the fourth cavity are provided on the base, the cover covers the first cavity, the second cavity, the third cavity and the fourth cavity, the first mounting hole, the second mounting hole, the air inlet pipe and the nitrogen discharge pipe are provided on the base,

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

[0030] Therefore, the valve seat is assembled by the base and the cover body, which is convenient for processing and forming, and the first cavity, the second cavity, the third cavity, the fourth cavity, the gas inlet pipe and the nitrogen discharge pipe on the base can be cleaned and maintained after the cover body is detached from the base.

[0031] Further, a sealing gasket is arranged, 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 ports of the first cavity, the second cavity, the third cavity and the fourth cavity, a second sealing groove is arranged on the end surface of the cover body facing the base and is matched with the first sealing groove, and the shape of the sealing gasket is matched with the shape of the first sealing groove.

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

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

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

[0035] Therefore, when the base and the cover body are assembled, the sealing gasket is first accommodated in the first sealing groove, and then the two convex columns on the cover body are respectively inserted into the two recesses on the base, so that the sealing gasket is simultaneously accommodated in the first sealing groove and the second sealing groove, thereby quickly assembling the base, the sealing gasket and the cover body together.

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

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

[0038] Further, the cover body is provided with a first through hole and a second through hole, one end of the first through hole is communicated with the first gas outlet pipe, the other end of the first through hole is communicated with the second cavity, one end of the second through hole is communicated with the second gas outlet pipe, and the other end of the second through hole is communicated with the third cavity.

[0039] Therefore, the first air outlet pipe and the second air outlet pipe on the cover can be cleaned and maintained after the cover is detached from the base, which is very convenient, and the first air outlet pipe and the second air outlet pipe can be staggered in space with the nitrogen discharge pipe, so that the valve seat structure is connected with the separation tower and the nitrogen discharge port of the oxygen generator. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 A structure diagram of the valve seat structure for the portable oxygen generator is shown in the figure.

[0041] Figure 2 As shown in the figure. Figure 1 A split structure diagram of the valve seat structure after hiding the first sealing ring, the second sealing ring and the third sealing ring is shown in the figure.

[0042] Figure 3 As shown in the figure. Figure 1 Another perspective split structure diagram of the valve seat structure after hiding the first sealing ring, the second sealing ring and the third sealing ring is shown in the figure.

[0043] Figure 4 As shown in the figure. Figure 2 A structure diagram of the valve seat structure after hiding the line of the valve seat is shown in the figure.

[0044] Figure 5 As shown in the figure. Figure 2 Another perspective structure diagram of the valve seat structure is shown in the figure. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0046] In the description of the utility model, need understanding is, the term "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply the device or element indicated must have a particular orientation, with a particular orientation structure and operation, therefore can not be understood as the limitation of the utility model. In addition, the term "first", "second" and so on are only for the purpose of description, and can not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two;It should be pointed out that, unless otherwise specified and limited, the term "mounting", "connection", "connection", "arrangement" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements.

[0047] Referring to Figures 1 to 5 A valve seat structure for portable oxygen generator, including valve seat 1, first two three-way valve 2, second two three-way valve 3 and gasket 4.

[0048] Referring to Figure 1 Valve seat 1 is provided with air inlet pipe 11, first air outlet pipe 12, second air outlet pipe 13 and nitrogen discharge pipe 14, first two three-way valve 2 and second two three-way valve 3 are installed on valve seat 1, specifically, referring to 2 to Figure 5 Valve seat 1 includes base 101 and cover 102, cover 102 covers base 101, base 101 is formed with air inlet pipe 11 and nitrogen discharge pipe 14, air inlet pipe 11 and nitrogen discharge pipe 14 are located at both ends of base 101, first two three-way valve 2 and second two three-way valve 3 are installed on base 101, cover 102 is formed with first air outlet pipe 12 and second air outlet pipe 13, first air outlet pipe 12 and second air outlet pipe 13 are located on the same side of cover 102 and arranged in parallel.

[0049] Referring to Figures 1 to 3, the first gas outlet pipe 12 is formed with a first groove 122, the first sealing ring 121 is installed in the first groove 122, the second gas outlet pipe 13 is formed with a second groove 132, the second sealing ring 131 is installed in the second groove 132, the nitrogen discharge pipe 14 is formed with a third groove 142, the third sealing ring 141 is installed in the third groove 142, when the first gas outlet pipe 12 is connected with the gas inlet of the separation tower A in the oxygen generator, the first sealing ring 121 can ensure the sealing between the first gas outlet pipe 12 and the gas inlet of the separation tower A in the oxygen generator, when the second gas outlet pipe 13 is connected with the gas inlet of the separation tower B in the oxygen generator, the second sealing ring 131 can ensure the sealing between the second gas outlet pipe 13 and the gas inlet of the separation tower B in the oxygen generator, when the nitrogen discharge pipe 14 is connected with the nitrogen discharge port of the oxygen generator, the third sealing ring 141 can ensure the sealing between the nitrogen discharge pipe 14 and the nitrogen discharge port of the oxygen generator. In addition, the outer wall of the free end of the first gas outlet pipe 12 can be in the form of a conical surface, facilitating the connection of the first gas outlet pipe 12 with the gas inlet of the separation tower A in the oxygen generator, the outer wall of the free end of the second gas outlet pipe 13 can be in the form of a conical surface, facilitating the connection of the second gas outlet pipe 13 with the gas inlet of the separation tower B in the oxygen generator, the outer wall of the free end of the nitrogen discharge pipe 14 can be in the form of a conical surface, facilitating the connection of the nitrogen discharge pipe 14 with the nitrogen discharge port of the oxygen generator.

[0050] Referring to Figure 2 , the inner wall of the free end of the gas inlet pipe 11 is in the form of a conical surface, facilitating the insertion of the compressed gas outlet of the compressor into the gas inlet pipe 11.

[0051] Referring to 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 in the form of openings, the second cavity 16 and the third cavity 17 are respectively located on the two sides of the first cavity 15, the second cavity 16 and the third cavity 17 are respectively located on the two sides of the fourth cavity 18, the second cavity 16 and the third cavity 17 are symmetrically arranged about the first cavity 15, the second cavity 16 and the third cavity 17 are symmetrically arranged about the fourth cavity 18, the gas inlet pipe 11 communicates with the first cavity 15, the nitrogen discharge pipe 14 communicates with the fourth cavity 18, the cover body 102 covers the first cavity 15, the second cavity 16, the third cavity 17 and the fourth cavity 18 on the base 101, 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 communicates with the first gas outlet pipe 12, the other end of the first through hole 1023 communicates with the second cavity 16, one end of the second through hole 1024 communicates with the second gas outlet pipe 13, the other end of the second through hole 1024 communicates with the third cavity 17.

[0052] Referring to 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 inserted and fixed in the first mounting hole 19, and the second two-position three-way valve 3 is inserted and fixed in the second mounting hole 110. The first mounting hole 19 and the second mounting hole 110 are respectively located on two sides of the air inlet pipe 11. The inner wall of the first mounting hole 19 is formed with a first communication hole 191, a second communication hole 192 and a third communication hole 193. The first port of the first two-position three-way valve 2 communicates with the first cavity 15 through the first communication hole 191. The second port of the first two-position three-way valve 2 communicates with the second cavity 16 through the second communication hole 192. The third port of the first two-position three-way valve 2 communicates with the fourth cavity 18 through the third communication hole 193. That is, the first port of the first two-position three-way valve 2 communicates with the air inlet pipe 11 through the first communication hole 191, the first cavity 15 and the cover body 102. The second port of the first two-position three-way valve 2 communicates with the first air outlet pipe 12 on the cover body 102 through the second communication hole 192, the second cavity 16, the first through hole 1023 on the cover body 102. The third port of the first two-position three-way valve 2 communicates with the nitrogen discharge pipe 14 through the third communication hole 193, the fourth cavity 18. The inner wall of the second mounting hole 110 is formed with a fourth communication hole 111, a fifth communication hole 112 and a sixth communication hole 113. The first port of the second two-position three-way valve 3 communicates with the first cavity 15 through the fourth communication hole 111. The second port of the second two-position three-way valve 3 communicates with the third cavity 17 through the fifth communication hole 112. The third port of the second two-position three-way valve 3 communicates with the fourth cavity 18 through the sixth communication hole 113. That is, the first port of the second two-position three-way valve 3 communicates with the air inlet pipe 11 through the fourth communication hole 111, the first cavity 15. The second port of the second two-position three-way valve 3 communicates with the second air outlet pipe 13 on the cover body 102 through the fifth communication hole 112, the third cavity 17, the second through hole 1024 on the cover body 102. The third port of the second two-position three-way valve 3 communicates with the nitrogen discharge pipe 14 through the sixth communication hole 113, the fourth cavity 18.

[0053] Referring to Figure 2 and Figure 3In the embodiment, the first two-position three-way valve 2 and the second two-position three-way valve 3 are both MAC-BV310A two-position three-way electromagnetic valves, which are simple in structure, fast in response, low in power consumption, small in size, simple in structure, easy to install and maintain, and can realize the function of a two-position five-way valve through the structure of the two MAC-BV310A electromagnetic valves and the valve seat 1, so as to realize the connection between the compressor and the separation tower of the oxygen generator and form a valve seat structure which is small in size and simple in structure, thereby providing the possibility for further miniaturization of the portable oxygen generator. Through the control setting of the first two-position three-way valve 2 of the oxygen generator, the first port and the second port of the first two-position three-way valve 2 are connected, the compressed gas generated by the compressor in the oxygen generator enters the first cavity 15 through the gas inlet pipe 11, the compressed gas in the first cavity 15 enters the second cavity 16 through the first port and the second port of the first two-position three-way valve 2, the compressed gas in the second cavity 16 enters the separation tower A of the oxygen generator through the first through hole 1023 of the cover body 102 and the first gas 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 of the oxygen generator, the second port and the third port of the second two-position three-way valve 3 are connected, 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, nitrogen needs to be discharged, and 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 of the cover body 102, the nitrogen in the third cavity 17 enters the fourth cavity 18 through the second port and the third port of the second two-position three-way valve 3, and the nitrogen in the fourth cavity 18 is released into the atmosphere through the nitrogen discharge pipe 14 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), through the control setting of the first two-position three-way valve 2 of the oxygen generator, the second port and the third port of the first two-position three-way valve 2 are connected, 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 of the cover body 102, the nitrogen in the second cavity 16 enters the fourth cavity 18 through the second port and the third port of the first two-position three-way valve 2, and the nitrogen in the fourth cavity 18 is released into the atmosphere through the nitrogen discharge pipe 14 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 of the oxygen generator, the first port and the second port of the second two-position three-way valve 3 are connected, the compressed gas in the first cavity 15 enters the third cavity 17 through the first port and the second port of the second two-position three-way valve 3, and the compressed gas in the third cavity 17 enters the separation tower B of the oxygen generator through the second through hole 1024 and the second gas outlet pipe 13 of the cover body 102 to separate oxygen and nitrogen.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 generator can orderly realize the oxygen-nitrogen separation in the separation tower A of the oxygen generator, the nitrogen discharge in the separation tower B, the oxygen-nitrogen separation in the separation tower B, and the nitrogen discharge in the separation tower A, and the alternation of the working modes. The structure of the valve seat 1 and the two two-position three-way valves realize the function of the two-position five-way valve. The working mode of the first two-position three-way valve 2 and the second two-position three-way valve 3 can be set in advance by the oxygen generator. 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, the path of the compressed gas in the air inlet pipe 11 into the separation tower A and the path of the compressed gas into the separation tower B remain consistent, and the nitrogen discharge path of the nitrogen gas in the separation tower A and the nitrogen discharge path of the nitrogen gas in the separation tower B remain consistent, thereby ensuring the stability of the oxygen generator. Moreover, the first two-position three-way valve 2 and the second two-position three-way valve 3 are very easy to assemble and disassemble. The first two-position three-way valve 2 is inserted and fixed in the first mounting hole 19, and the second two-position three-way valve 3 is inserted and fixed in the second mounting hole 110, thereby realizing the connection with the valve seat 1 to realize the function of the two-position five-way valve.

[0054] Referring to Figure 2 and Figure 3 , the end surface of the base 101 facing the cover 102 is formed with a first sealing groove 1011, and the first sealing groove 1011 is arranged around 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 shape. The end surface of the cover 102 facing the base 101 is formed with a second sealing groove 1021 matched with the first sealing groove 1011. The second sealing groove 1021 is in a closed shape. The shape of the sealing gasket 4 is matched with the shapes of the first sealing groove 1011 and the second sealing groove 1021. When the cover 102 is closed on the base 101, half of the thickness direction of the sealing gasket 4 is accommodated in the first sealing groove 1011, and the other half of the thickness direction of the sealing gasket 4 is accommodated in the second sealing groove 1021. The sealing gasket 4 can improve the sealing between the first cavity 15, the second cavity 16, the third cavity 17, the fourth cavity 18, and the cover 102, respectively, to prevent gas leakage.

[0055] Referring to Figure 2 and Figure 3The end surface of the base 101 facing the cover 102 is formed with two recesses 1012, and the end surface of the cover 102 facing the base 101 is formed with two protrusions 1022 respectively matched with the two recesses 1012. The two protrusions 1022 are respectively inserted into the two recesses 1012. When the base 101 and the cover 102 are assembled, the sealing gasket 4 is first accommodated in the first sealing groove 1011, and then the two protrusions 1022 on the cover 102 are respectively inserted into the two recesses 1012 on the base 101. This can ensure that the sealing gasket 4 is simultaneously accommodated in the first sealing groove 1011 and the second sealing groove 1021, so that the base 101, the sealing gasket 4 and the cover 102 can be quickly assembled together.

[0056] The cover 102 and the base 101 are connected by screws (not shown), and the cover 102 and the base 101 can be firmly assembled together by the screws, so as 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 assembled by the base 101 and the cover 102, which is convenient for processing and forming. After the cover 102 is detached from the base 101, the first cavity 15, the second cavity 16, the third cavity 17, the fourth cavity 18, the air inlet pipe 11 and the nitrogen discharge pipe 14 on the base 101 can be cleaned and maintained. After the cover 102 is detached from the base 101, the first air outlet pipe 12 and the second air outlet pipe 13 on the cover 102 can be cleaned and maintained. This is very convenient. In addition, since the first air outlet pipe 12 on the cover 102 communicates with the second cavity 16 through the first through hole 1023, and the second air outlet pipe 13 communicates with the third cavity 17 through the second through hole 1024, the first air outlet pipe 12 and the second air outlet pipe 13 are staggered in space with the nitrogen discharge pipe 14, which facilitates the connection of the valve seat structure with the separation tower and the nitrogen discharge port on the oxygen generator.

[0057] Referring to Figures 1 to 5The utility model discloses a valve seat structure for portable oxygen generator, and the compressed gas outlet on the compressor in the oxygen generator is connected with the air inlet pipe 11, the first air outlet pipe 12 is connected with the air inlet on the separation tower A in the oxygen generator, and the second air outlet pipe 13 is connected with the air inlet on the separation tower B in the oxygen generator, when the oxygen generator works, through the control setting of the first two three -way valves 2 of the oxygen generator, the first port and the second port on the first two three -way valves 2 are conducted, and the compressed gas generated by the compressor in the oxygen generator enters the separation tower A through the air inlet pipe 11, the first cavity 15, the first port, the second port on the first two three -way valves 2, the second cavity 16, the first through -hole 1023 and the first air outlet pipe 12 to separate oxygen and nitrogen, simultaneously, through the control setting of the second two three -way valves 3 of the oxygen generator, the second port and the third port on the second two three -way valves 3 are conducted, and the nitrogen in the separation tower B is released to the atmosphere through the second air outlet pipe 13, the second through -hole 1024, the third cavity 17, the second port, the third port on the second two three -way valves 3, the fourth cavity 18 and the nitrogen discharge pipe 14 to reduce the pressure of 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, through the control setting of the first two three -way valves 2 of the oxygen generator, the second port and the third port on the first two three -way valves 2 are conducted, and the nitrogen in the separation tower A is released to the atmosphere through the first air outlet pipe 12, the first through -hole 1023, the second cavity 16, the second port, the third port on the first two three -way valves 2, the fourth cavity 18 and the nitrogen discharge pipe 14 to reduce the pressure of molecular sieve in the separation tower A, simultaneously, through the control setting of the second two three -way valves 3 of the oxygen generator, the first port and the second port on the second two three -way valves 3 are conducted, and the compressed gas generated by the compressor in the oxygen generator enters the separation tower B through the air inlet pipe 11, the first cavity 15, the first port, the second port on the second two three -way valves 3, the third cavity 17, the second through -hole 1024 and the second air outlet pipe 13 to separate oxygen and nitrogen, through the control setting (specifically: can set the time of power on and power off of the first two three -way valves 2 and the second two three -way valves 3) of the first two three -way valves 2 and the second two three -way valves 3 of the oxygen generator, the oxygen and nitrogen separation in the separation tower A and the nitrogen discharge-separation tower B oxygen and nitrogen separation in the separation tower A and the nitrogen discharge can be realized in order, and the oxygen generator works alternately, the valve seat structure of the utility model realizes the function of two five three -way valves through the structure of valve seat 1 and two two three -way valves, and the structure is simple, can reduce the pipeline connection between the compressor and the separation tower in the oxygen generator, reduce material cost, reduce assembly, make the assembly simple, reduce the finished product bad caused by pipeline, joint and component itself, improve the yield, and reduce the material, effectively reduce the noise of the oxygen generator, and effectively reduce the occupation space inside the portable oxygen generator, provide the possibility for the further miniaturization of the portable oxygen generator.

[0058] The above descriptions are merely some embodiments of this utility model, intended to illustrate the technical means of this utility model, and are not intended to limit the technical scope of this utility model. Any obvious improvements made to this utility model by those skilled in the art in conjunction with existing common knowledge fall within the protection scope of this utility model.

Claims

1. A valve seat structure for a portable oxygen concentrator, characterized in that, include: The valve seat is provided with an air inlet pipe, a first air outlet pipe, a second air outlet pipe and a nitrogen discharge pipe. The first air outlet pipe is provided with a first sealing ring, the second air outlet pipe is provided with a second sealing ring, and the nitrogen discharge pipe is provided with a third sealing ring. The first two-position three-way valve has its first port connected to the inlet pipe, its second port connected to the first outlet pipe, and its third port connected to the nitrogen discharge pipe; and The second two-position three-way valve has its first port connected to the air inlet pipe, its second port connected to the second air outlet pipe, and its third port connected to the nitrogen discharge 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 chamber, the first air outlet pipe is connected to the second chamber, the second air outlet pipe is connected to the third chamber, and the nitrogen exhaust pipe is connected to the fourth chamber. 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 connected to the first cavity, the second port of the second two-position three-way valve is connected to the third cavity, and the third port of the second two-position three-way valve is connected to the fourth cavity.

3. The valve seat structure according to claim 2, characterized in that, Both the first two-position three-way valve and the second two-position three-way valve are two-position three-way solenoid valves with model number 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 inserted and fixed in the first mounting hole, and the second two-position three-way valve is inserted 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. The inner wall of the second mounting hole is provided with a fourth connecting hole, a fifth connecting hole and a sixth connecting 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 located on both sides of the first cavity, and the second cavity and the third cavity are located on both sides of the fourth cavity.

6. The valve seat structure according to claim 4, characterized in that, The valve seat includes a base and a cover. The first, second, third, and fourth cavities are all mounted on the base, and a cover is placed on the base to cover the first, second, third, and fourth cavities. The first mounting hole, the second mounting hole, the air inlet pipe, and the nitrogen exhaust pipe are all located on the base. Both the first and second vent pipes are located on the cover.

7. The valve seat structure according to claim 6, characterized in that, It also includes a sealing gasket. A first sealing groove is provided on the end face of the base facing the cover. The first sealing groove is arranged around the ports of the first cavity, second cavity, third cavity, and fourth cavity. A second sealing groove adapted to the first sealing groove is provided on the end face of the cover facing the base. The shape of the sealing gasket is adapted to the shape of the first sealing groove. When the cover is placed on the base, half of the gasket in the thickness direction is accommodated in the first sealing groove, and the other half of the gasket in the thickness direction is accommodated in the second sealing groove.

8. The valve seat structure according to claim 7, characterized in that, The base has two recesses on the end face facing the cover, and the cover has two protrusions on the end face facing the base that are adapted to the two recesses respectively. The two protrusions are respectively inserted into the two recesses.

9. The valve seat structure according to claim 6, characterized in that, The cover and the base are connected by screws.

10. The valve seat structure according to any one of claims 6 to 8, characterized in that, The cover is provided with a first through hole and a second through hole. One end of the first through hole is connected to the first vent pipe, and 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 vent pipe, and the other end of the second through hole is connected to the third cavity.

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