Connecting structure of oxygen storage tank and adsorption tower for oxygen generator

Abstract

The utility model relates to the technical field of oxygenerators, in particular to a connecting structure of an oxygen storage tank and an adsorption tower for an oxygenerator. Comprising an oxygen storage tank, an adsorption tower A and an adsorption tower B. The oxygen storage tank comprises an air inlet A and an air inlet B which are communicated with an output part of the adsorption tower A and an output part of the adsorption tower B. One-way valve plates are attached to orifices, located in the oxygen storage tank, of the air inlet A and the air inlet B. A blowback pipeline is also communicated between the output part of the adsorption tower A and the output part of the adsorption tower B; a first valve for limiting the opening and closing time of the blowback pipeline and a second valve for limiting the gas flow in the blowback pipeline are mounted on the blowback pipeline; the service life of the air compressor and the molecular sieve is prolonged, meanwhile, the oxygen loss amount is small, and the oxygen output flow of the oxygen storage tank is stable.

Description

Technical Field

[0001] The utility model relates to the technical field of oxygen generators, in particular to a connection structure between an oxygen storage tank and an adsorption tower for an oxygen generator. Background Art

[0002] The traditional small-scale medical molecular sieve oxygen generator pressure swing adsorption system is an adsorption tower filled with oxygen-generating molecular sieves that alternately adsorbs nitrogen and produces oxygen. The specific process is as follows: after the raw air is pressurized by the compressor, it passes through the air pretreatment device to remove oil, dust and other solids in the oxygen storage tank, while the molecular sieve that has completed adsorption in the other adsorption tower is quickly depressurized to analyze the adsorbed components. The two adsorption towers are cycled alternately to obtain oxygen with a purity of ≥90%. In order to completely discharge the nitrogen released by the molecular sieve depressurization into the atmosphere, oxygen is purged through a normally open throttle valve in the desorbing adsorption tower, blowing the nitrogen in the tower out of the adsorption tower. This process is called backblowing, which is carried out simultaneously with desorption.

[0003] In the prior art, such as Figure 1 As shown, the output parts of the adsorption tower A30 and the adsorption tower B31 are respectively connected to the two air inlets of the oxygen storage tank 32 through the first pipeline 33 and the second pipeline 34. The first pipeline 33 and the second pipeline 34 are both equipped with a throttle valve 35 with a fixed aperture (taking the 5L molecular sieve configuration as an example, the aperture of the throttle valve 35 is about φ1.3~φ1.5mm). The function of the throttle valve 35 is mainly to limit the flow and increase the pressure. The amount of oxygen passing through the first pipeline 33 and the second pipeline 34 is limited; on the one hand, the small aperture of the throttle valve 35 causes the air pressure in the adsorption tower to rise rapidly when the compressed air is input, and the pressure is relatively large (the pressure is about 120~200kPa when the air path is switched alternately). The high air pressure will affect the compressor and The service life of the molecular sieve; on the other hand, the throttle valve 35 is normally open. During the oxygen production process in one adsorption tower, based on the oxygen blowback mechanism, the oxygen in the oxygen storage tank 32 continues to flow to the other adsorption tower and is finally lost along with the nitrogen discharge; that is, when the oxygen produced by the adsorption tower A30 flows into the oxygen storage tank 32 through the first pipeline 33, the oxygen in the oxygen storage tank 32 is continuously blown back to the adsorption tower B31 through the second pipeline 34. Conversely, when the oxygen produced by the adsorption tower B31 flows into the oxygen storage tank 32 through the second pipeline 34, the oxygen in the oxygen storage tank 32 is continuously blown back to the adsorption tower A30 through the first pipeline 33, resulting in a large oxygen loss and large fluctuations in the oxygen output flow of the oxygen storage tank 32. Utility Model Content

[0004] The utility model aims to provide a connection structure between an oxygen storage tank and an adsorption tower for an oxygen concentrator, so as to solve the problems in the prior art that the adsorption tower and the oxygen storage tank are connected by two pipelines equipped with throttle valves, which affects the service life of the compressor and the molecular sieve, and at the same time, the oxygen loss is large and the oxygen output flow rate of the oxygen storage tank fluctuates greatly.

[0005] The technical solution of the utility model is: a connection structure between an oxygen storage tank and an adsorption tower for an oxygen concentrator, comprising an oxygen storage tank, an adsorption tower A and an adsorption tower B, wherein the oxygen storage tank comprises an air inlet A and an air inlet B respectively connected with the output part of the adsorption tower A and the output part of the adsorption tower B, wherein the air inlet A and the air inlet B are located at the orifices inside the oxygen storage tank and are fitted with a one-way valve sheet; a back-blowing pipeline is also connected between the output parts of the adsorption tower A and the output parts of the adsorption tower B, and a first valve for limiting the opening and closing time of the back-blowing pipeline and a second valve for limiting the gas flow rate in the back-blowing pipeline are installed on the back-blowing pipeline.

[0006] Preferably, the oxygen storage tank, adsorption tower A and adsorption tower B share a sealed end cover, and the output part of the adsorption tower A, the output part of the adsorption tower B, the air inlet A and the air inlet B are all arranged on the sealed end cover.

[0007] Preferably, the one-way valve sheet is a rectangular silicone sheet, the middle of the one-way valve sheet is fixed by a pressing plate, and both ends in the length direction are free ends, and cover the air inlet hole A and the air inlet hole B respectively.

[0008] Preferably, a fixing column is set in the middle of the air inlet hole A and the air inlet hole B, a first mounting hole is opened in the middle of the length direction of the one-way valve plate, and the one-way valve plate is mounted on the fixing column through the first mounting hole; a second mounting hole is opened in the middle of the length direction of the pressure plate, and the pressure plate is mounted on the fixing column through the second mounting hole, the pressure plate and the one-way valve plate are perpendicular to each other, and the two ends of the pressure plate in the length direction are fixed to the sealing end cover by screws.

[0009] Preferably, the sealing end cover has a symmetrical structure, including a first sealing part that seals the oxygen storage tank, a second sealing part that seals the adsorption tower A located on both sides of the first sealing part, and a third sealing part that seals the adsorption tower B. The output part of the adsorption tower A is a first groove opened inside the second sealing part and the first sealing part body, and the output part of the adsorption tower B is a second groove opened inside the third sealing part and the first sealing part body. The air inlet A is formed by an upward opening of the groove top of the first groove located in the first sealing part extending to the top surface of the first sealing part, and the air inlet B is formed by an upward opening of the groove top of the second groove located in the first sealing part extending to the top surface of the first sealing part.

[0010] Preferably, a first connecting pipe is provided on the bottom surface of the second sealing portion, and the first connecting pipe is connected to the bottom of the first groove; a second connecting pipe is provided on the bottom surface of the third sealing portion, and the second connecting pipe is connected to the bottom of the second groove; the back-blowing pipe is connected between the first connecting pipe and the second connecting pipe.

[0011] Preferably, the first valve is a solenoid valve, and the second valve is a flow limiting valve.

[0012] Preferably, the back-blowing pipe includes a first quick-connect connector, a first PU tube, a second quick-connect connector, a solenoid valve, a third quick-connect connector, a second PU tube, and a fourth quick-connect connector connected in sequence, a first flow limiting valve is installed in the first PU tube, a second flow limiting valve is installed in the second PU tube, the first quick-connect connector is installed on the first connecting tube, and the fourth quick-connect connector is installed on the second connecting tube.

[0013] Preferably, a reversing valve is installed at one end of the adsorption tower A and the adsorption tower B away from the sealing end cover, and a regulating valve assembly for adjusting the oxygen delivery pressure is installed at one end of the oxygen storage tank away from the sealing end cover.

[0014] Compared with the prior art, the advantages of the utility model are:

[0015] The utility model discloses a connection structure of an oxygen storage tank and an adsorption tower for an oxygen concentrator, comprising an oxygen storage tank, an adsorption tower A and an adsorption tower B. The oxygen storage tank comprises an air inlet A and an air inlet B respectively connected with the output part of the adsorption tower A and the output part of the adsorption tower B. The air inlet A and the air inlet B are located at the openings of the oxygen storage tank and are fitted with a one-way valve sheet. A blowback pipeline is also connected between the output parts of the adsorption tower A and the output parts of the adsorption tower B. The blowback pipeline is provided with an electromagnetic valve for limiting the opening and closing time of the blowback pipeline and a valve for limiting the gas flow in the blowback pipeline. The first and second limiting valves are used to limit the flow of oxygen in the back-blowing pipeline, thereby avoiding the waste of back-blowing oxygen, improving the oxygen production efficiency of the oxygen generator, concentrating the oxygen pressure in the oxygen storage tank, and making the output flow of the oxygen storage tank more stable.

[0016] In the utility model, the width of the first groove and the second groove is 2.5-3 mm. Compared with the first pipeline and the second pipeline equipped with a throttle valve in the prior art, the flow rate of oxygen from the adsorption tower into the oxygen storage tank is faster, the pressure in the adsorption tower is smaller (the pressure is 80-170 kPa when the gas path is switched alternately), and the service life of the compressor and the molecular sieve is longer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0018] Figure 1 It is a schematic diagram of the assembly structure of the adsorption tower and the oxygen storage tank in the prior art;

[0019] Figure 2 This is a schematic diagram of the connection structure between an oxygen storage tank and an adsorption tower for an oxygen generator according to this embodiment;

[0020] Figure 3 This is a schematic cross-sectional structure diagram of an oxygen storage tank and an adsorption tower for an oxygen generator according to this embodiment;

[0021] Figure 4 This is a schematic diagram of the structure of the sealing end cover described in this embodiment;

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of the sealing end cover described in this embodiment.

[0023] Wherein: 1. oxygen storage tank, 2. adsorption tower A, 3. adsorption tower B, 4. air inlet A, 5. air inlet B, 6. one-way valve plate, 7. reversing valve, 8. regulating valve assembly, 9. fifth quick-plug connector, 10. sixth quick-plug connector, 11. sealing end cover, 12. pressure plate, 13. fixing column, 14. first groove, 15. second groove, 16. first connecting pipe, 17. second connecting pipe, 18. first quick-plug connector, 19. first PU tube, 20. second quick-plug connector, 21. solenoid valve C, 22. third quick-plug connector, 23. second PU tube, 24. fourth quick-plug connector, 25. first flow limiting valve, 26. second flow limiting valve. DETAILED DESCRIPTION

[0024] The following is a further detailed description of the present invention in conjunction with specific embodiments:

[0025] In the description of the utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply 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 a limitation on the utility model.

[0026] like Figure 2As shown, a connection structure of an oxygen storage tank and an adsorption tower for an oxygen concentrator includes an oxygen storage tank 1, an adsorption tower A2, and an adsorption tower B3. The oxygen storage tank 1 includes an air inlet A4 and an air inlet B5 which are respectively connected to the output part of the adsorption tower A2 and the output part of the adsorption tower B3. The air inlet A4 and the air inlet B5 are located at the openings inside the oxygen storage tank 1 and are fitted with a one-way valve sheet 6. The output parts of the adsorption tower A2 and the adsorption tower B3 are also connected to a back-blowing pipeline, and the back-blowing pipeline is installed with a first valve that limits the opening and closing time of the back-blowing pipeline and a second valve that limits the gas flow rate in the back-blowing pipeline. A reversing valve 7 is installed at the end of the adsorption tower A2 and the adsorption tower B3 away from the sealing end cover 11, and the end of the oxygen storage tank 1 away from the sealing end cover 11 is a regulating valve assembly 8 for adjusting the oxygen delivery pressure. Two solenoid valves are installed in the reversing valve 7. When the solenoid valve is energized, the compressed air pressure is greater than the pressure in the adsorption tower, and the compressed air opens the valve and enters the adsorption tower; when the solenoid valve is de-energized, the pressure in the adsorption tower is greater than the pressure in the solenoid valve, and the nitrogen opens the valve under the action of pressure to discharge the nitrogen; in this embodiment, the solenoid valve A (not shown in the figure) is connected to the adsorption tower A2, and the solenoid valve B (not shown in the figure) is connected to the adsorption tower B3. The reversing valve 7 is connected with a fifth quick-plug connector 9 as a compressed air input port and a sixth quick-plug connector 10 as a nitrogen output port.

[0027] like Figure 3 , Figure 4 As shown, the oxygen storage tank 1, the adsorption tower A2, and the adsorption tower B3 share a sealed end cover 11, and the output part of the adsorption tower A2, the output part of the adsorption tower B3, the air inlet A4, and the air inlet B5 are all arranged on the sealed end cover 11. Figure 4 , Figure 5 As shown, the one-way valve disc 6 is a rectangular silicone sheet. The middle of the one-way valve disc 6 is fixed by a pressure plate 12, and the two ends in the length direction are free ends, and they cover the air inlet hole A4 and the air inlet hole B5 respectively. A fixing column 13 is set in the middle of the air inlet hole A4 and the air inlet hole B5. A first mounting hole is opened in the middle of the length direction of the one-way valve disc 6, and the one-way valve disc 6 is sleeved on the fixing column 13 through the first mounting hole; a second mounting hole is opened in the middle of the length direction of the pressure plate 12, and the pressure plate 12 is sleeved on the fixing column 13 through the second mounting hole. The pressure plate 12 and the one-way valve disc 6 are perpendicular to each other, and the two ends in the length direction of the pressure plate 12 are fixed to the sealing end cover 11 by screws. In the utility model, one one-way valve disc 6 is set instead of two, and soft silicone is used, so that the installation structure of the one-way valve disc 6 is simpler.

[0028] The sealing end cover 11 has a symmetrical structure, including a first sealing portion for sealing the oxygen storage tank 1, a second sealing portion for sealing the adsorption tower A2 located on both sides of the first sealing portion, and a third sealing portion for sealing the adsorption tower B3. Figure 5As shown, the output part of the adsorption tower A2 is a first groove 14 provided inside the second sealing part and the first sealing part body, the output part of the adsorption tower B3 is a second groove 15 provided inside the third sealing part and the first sealing part body, the air inlet A4 is formed by the first groove 14, where the groove top of the part located in the first sealing part is upwardly opened to the top surface of the first sealing part, and the air inlet B5 is formed by the second groove 15, where the groove top of the part located in the first sealing part is upwardly opened to the top surface of the first sealing part. In this embodiment, the groove width of the first groove 14 and the second groove 15 is 2.5-3 mm. Compared with the first pipeline and the second pipeline equipped with a throttle valve in the prior art, the circulation speed of oxygen flowing from the adsorption tower into the oxygen storage tank 1 is faster, the pressure in the adsorption tower is smaller (the pressure is 80-170 kPa when the gas path is switched alternately), and the service life of the compressor and the molecular sieve is longer.

[0029] The bottom surface of the second sealing part is provided with a first connecting pipe 16, which is connected to the bottom of the first groove 14; the bottom surface of the third sealing part is provided with a second connecting pipe 17, which is connected to the bottom of the second groove 15; the blowback pipe is connected between the first connecting pipe 16 and the second connecting pipe 17. The first valve is a solenoid valve, and the second valve is a flow limiting valve. The blowback pipe includes a first quick-connect fitting 18, a first PU tube 19, a second quick-connect fitting 20, a solenoid valve C21, a third quick-connect fitting 22, a second PU tube 23, and a fourth quick-connect fitting 24 connected in sequence, a first flow limiting valve 25 is installed in the first PU tube 19, a second flow limiting valve 26 is installed in the second PU tube 23, the first quick-connect fitting 18 is installed on the first connecting pipe 16, and the fourth quick-connect fitting 24 is installed on the second connecting pipe 17. The on-off of the back-blowing pipeline is controlled by the solenoid valve, thereby controlling the usage of the back-blowing oxygen. The flow rate of oxygen in the back-blowing pipeline is limited by the first limiting valve 25 and the second limiting valve 26, thereby avoiding the waste of back-blowing oxygen, improving the oxygen production efficiency of the oxygen concentrator, concentrating the oxygen pressure on the oxygen storage tank 1, and making the output flow of the oxygen storage tank 1 more stable.

[0030] The operation procedures of solenoid valve A, solenoid valve B and solenoid valve C21 correspond to the opening and closing states shown in Table 1 for continuous cyclic operation. At TO, both solenoid valve A and solenoid valve B are energized, which is the reversing and pressure-equalizing stage of the oxygen generator; at T1, solenoid valve A is energized (the valve port of solenoid valve A is in the compressed air input stage, and adsorption tower A2 is in the nitrogen adsorption and oxygen production stage), and solenoid valve B is de-energized (the valve port of solenoid valve B is in the nitrogen exhaust stage). During the T1 stage, after the set delay period T2, the stage T3 and TO are entered, and solenoid valve C21 is energized to allow storage. The oxygen in the oxygen tank 1 flows out from the solenoid valve C21 to blow back the adsorption tower B3 during nitrogen discharge to assist in nitrogen discharge; alternatively, at time T1, the corresponding solenoid valve B is energized (the valve port of the solenoid valve B is in the compressed air input stage, and the adsorption tower B3 is in the nitrogen adsorption and oxygen production stage), and the solenoid valve A is de-energized (the valve port of the solenoid valve A is in the nitrogen discharge stage). During the T1 stage, after the set delay period T2, the stage T3 and TO are entered, and the solenoid valve C21 is energized, allowing the oxygen in the oxygen storage tank 1 to flow out from the solenoid valve C21 to blow back the adsorption tower A2 during nitrogen discharge to assist in nitrogen discharge.

[0031]

[0032] Table 1

[0033] The working principle of the utility model is:

[0034] Turn on the oxygen generator and enter the TO pressure equalization stage. This time period lasts for about 0.3 to 1.5 seconds (adjustable according to the actual measured value of the oxygen concentration). The solenoid valve A and the solenoid valve B in the reversing valve 7 are energized, and the solenoid valve C21 is not energized. The valve ports of the solenoid valves A and B form a pressure difference to push the diaphragm in the valve to communicate with the compressed air. The compressed air flows into the adsorption tower A2 and the adsorption tower B3 through the fifth quick-plug connector 9, and the nitrogen exhaust port is closed at this time, and the pressure in the adsorption tower A2 and the adsorption tower B3 is increased;

[0035] Then, during the T1 period of the program, the solenoid valve A continues to be energized and the solenoid valve B is de-energized. The molecular sieve in the adsorption tower A2 adsorbs nitrogen and outputs oxygen through the first groove 14 of the sealing end cover 11. A portion of the output oxygen pushes the part of the one-way valve plate 6 covering the air inlet A4 and enters the oxygen storage tank 1. At the same time, since the solenoid valve B is de-energized, the valve port of the solenoid valve B is disconnected from the compressed air input port, and compressed air cannot be input. The valve port of the solenoid valve B is pushed open by the reaction of the compressed air pressure previously input into the adsorption tower B3, and is connected to the nitrogen exhaust port, and nitrogen exhaust begins. At this time, since the solenoid valve B is not energized, compressed air cannot be input into the adsorption tower B3, and the reversing valve connected to the adsorption tower B3 is disconnected from the compressed air input port. Valve 7 (valve port of solenoid valve B) is connected to the atmosphere (in a nitrogen exhaust state), so at this time the adsorption tower B3 is in a normal pressure state, the pressure in the oxygen storage tank 1 is greater than the pressure of the adsorption tower B3, and the part of the one-way valve plate 6 covering the air inlet B5 blocks the air inlet B5 under the action of the pressure difference, the oxygen storage tank 1 is not connected to the adsorption tower B3, and the oxygen output by the adsorption tower A2 is collected in the oxygen storage tank 1; at the same time, another part of the oxygen output is blown back to the adsorption tower B3 through the blowback pipeline to flush the residual nitrogen, and the blowback pipeline is controlled by the solenoid valve C21 to control the on-off of the blowback pipeline, thereby controlling the use of the blowback oxygen, and the flow rate of oxygen in the blowback pipeline is limited by the first limiting valve 25 and the second limiting valve 26;

[0036] After a certain period of work (when the molecular sieve in adsorption tower A2 is about to be saturated with nitrogen adsorption), the electronic control system supplies power to the solenoid valve B and enters the control program T0 process. Both the solenoid valve A and the solenoid valve B are energized, and the compressed air flows into the adsorption tower A2 and the adsorption tower B3 through the fifth quick-plug connector 9 for pressure equalization; then the power supply of the second flow limiting valve A is disconnected, and the solenoid valve B continues to be powered, and the control program T1 process is entered, and the adsorption tower B3 starts to work. The molecular sieve in the adsorption tower B3 adsorbs nitrogen, and outputs oxygen through the second groove 15 of the sealing end cover 11 to push open the part of the one-way valve plate 6 covering the air inlet B5, and enters the oxygen storage tank 1; at this time, since the solenoid valve A is not energized, compressed air cannot be input into the adsorption tower A2, and the reversing valve 7 (the valve port of the solenoid valve A) connected to the adsorption tower A2 is connected to the atmosphere (in a nitrogen exhaust state). At this time, there is no continuous pressure input to the adsorption tower A2, and the adsorption tower B3 There is continuous pressure input. Under the action of pressure difference, the part of the one-way valve plate 6 covering the air inlet B5 opens, and the part of the one-way valve plate 6 covering the air inlet A4 blocks the air inlet A4 under the reverse pressure of the oxygen storage tank 1. The oxygen storage tank 1 is not connected to the adsorption tower A2. Part of the oxygen output by the adsorption tower B3 is collected in the oxygen storage tank 1, and the other part is blown back to the adsorption tower A2 through the blowback pipeline to flush the residual nitrogen. The adsorption tower A2 is connected to the sixth quick-connect connector 10 through the reversing valve 7 (the valve port of the solenoid valve A is connected to the atmosphere) to discharge the nitrogen into the atmosphere; enter the control program T2 (adjustable delay period) and T3 (starting the solenoid valve C21) process, and the solenoid valve C21 is used to control the on-off of the blowback pipeline, thereby controlling the use of the blowback oxygen, and the first limiting valve 25 and the second limiting valve 26 are used to limit the flow of oxygen in the blowback pipeline, and this cycle is repeated until the power is turned off.

[0037] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model.

Claims

1. A connection structure between an oxygen storage tank and an adsorption tower for an oxygen generator, characterized in that: It includes an oxygen storage tank, an adsorption tower A and an adsorption tower B. The oxygen storage tank includes an air inlet A and an air inlet B which are respectively connected to the output parts of the adsorption tower A and the output parts of the adsorption tower B. The air inlet A and the air inlet B are located at the openings inside the oxygen storage tank and are fitted with one-way valve sheets. A back-blowing pipe is also connected between the output parts of the adsorption tower A and the output parts of the adsorption tower B. A first valve for limiting the opening and closing time of the back-blowing pipe and a second valve for limiting the gas flow rate in the back-blowing pipe are installed on the back-blowing pipe.

2. The connection structure of an oxygen storage tank and an adsorption tower for an oxygen generator according to claim 1, characterized in that: The oxygen storage tank, adsorption tower A and adsorption tower B share a sealed end cover, and the output part of the adsorption tower A, the output part of the adsorption tower B, the air inlet A and the air inlet B are all arranged on the sealed end cover.

3. The connection structure of an oxygen storage tank and an adsorption tower for an oxygen generator according to claim 1, characterized in that: The one-way valve sheet is a rectangular silicone sheet. The middle of the one-way valve sheet is fixed by a pressing plate, and both ends in the length direction are free ends, and cover the air inlet hole A and the air inlet hole B respectively.

4. The connection structure of the oxygen storage tank and the adsorption tower for an oxygen generator according to claim 3, characterized in that: A fixing column is set in the middle of the air inlet hole A and the air inlet hole B, a first mounting hole is opened in the middle of the length direction of the one-way valve plate, and the one-way valve plate is mounted on the fixing column through the first mounting hole; a second mounting hole is opened in the middle of the length direction of the pressure plate, and the pressure plate is mounted on the fixing column through the second mounting hole, the pressure plate and the one-way valve plate are perpendicular to each other, and the two ends of the pressure plate in the length direction are fixed to the sealing end cover by screws.

5. The connection structure of an oxygen storage tank and an adsorption tower for an oxygen generator according to claim 2, characterized in that: The sealing end cover has a symmetrical structure, including a first sealing part that seals the oxygen storage tank, a second sealing part of the sealed adsorption tower A located on both sides of the first sealing part, and a third sealing part of the sealed adsorption tower B. The output part of the adsorption tower A is a first groove opened inside the second sealing part and the first sealing part body, and the output part of the adsorption tower B is a second groove opened inside the third sealing part and the first sealing part body. The air inlet A is formed by an upward opening of the groove top of the first groove located in the first sealing part to extend to the top surface of the first sealing part, and the air inlet B is formed by an upward opening of the groove top of the second groove located in the first sealing part to extend to the top surface of the first sealing part.

6. The connection structure of the oxygen storage tank and the adsorption tower for an oxygen generator according to claim 5, characterized in that: A first connecting pipe is provided on the bottom surface of the second sealing portion, and the first connecting pipe is connected to the bottom of the first groove; a second connecting pipe is provided on the bottom surface of the third sealing portion, and the second connecting pipe is connected to the bottom of the second groove; the back-blowing pipe is connected between the first connecting pipe and the second connecting pipe.

7. The connection structure of the oxygen storage tank and the adsorption tower for an oxygen generator according to claim 6, characterized in that: The first valve is a solenoid valve, and the second valve is a flow limiting valve.

8. The connection structure of the oxygen storage tank and the adsorption tower for an oxygen generator according to claim 7, characterized in that: The back-blowing pipeline includes a first quick-connect connector, a first PU tube, a second quick-connect connector, a solenoid valve, a third quick-connect connector, a second PU tube, and a fourth quick-connect connector connected in sequence, a first flow limiting valve is installed in the first PU tube, a second flow limiting valve is installed in the second PU tube, the first quick-connect connector is installed on the first connecting tube, and the fourth quick-connect connector is installed on the second connecting tube.

9. The connection structure of an oxygen storage tank and an adsorption tower for an oxygen concentrator according to claim 2, characterized in that: A reversing valve is installed at one end of the adsorption tower A and the adsorption tower B away from the sealing end cover, and a regulating valve assembly for adjusting the oxygen delivery pressure is installed at one end of the oxygen storage tank away from the sealing end cover.

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