Split type module valve and molecular sieve oxygen generator thereof

Abstract

The invention provides a split type module valve and a molecular sieve oxygenerator thereof, the split type module valve comprises a square valve body, the valve body is provided with an internal main channel and a plurality of branch channels, and the branch channels are used for being in butt joint with an external pipeline; a valve controller is arranged between the main channel and each branch channel, and communication and closing between the main channel and the branch channels are completed through opening and closing of the valve controllers. The invention further provides a molecular sieve oxygen generator which comprises a plurality of split type module valves. Due to the fact that the split type module valve can be machined at a time, the precision is easy to control, the installation mode is simple, adjustment is convenient especially under the condition that pipelines of the molecular sieve oxygen generator are many and complex, manpower can be saved, pollution is reduced, and the size is reduced.

Description

Technical Field

[0001] The present application relates to medical devices, and in particular to a split module valve used in a medical molecular sieve oxygen generator and a molecular sieve oxygen generator thereof. Background Art

[0002] As oxygen therapy becomes more and more common, the amount of oxygen used in large hospitals increases, and oxygen is inconvenient to use in plateau areas. The solution to these problems is a large molecular sieve oxygen generator. Molecular sieve oxygen generator is the only mature oxygen generator with international and national standards. The molecular sieve oxygen system uses air as raw material and adopts pressure swing adsorption technology to purify oxygen in the air to obtain high-purity oxygen. Medical molecular sieve oxygen generators have no special safety requirements and can extract high-concentration oxygen from the air, reducing the use of liquid oxygen in hospitals and the cost of oxygen. Oxygen is produced as needed and operates continuously for 24 hours.

[0003] The working principle of the medical molecular sieve oxygen production system is based on molecular sieve pressure swing adsorption (PSA) technology. This technology uses zeolite molecular sieve as an adsorbent, and utilizes the adsorption characteristics of molecular sieve for nitrogen and other gases in the air to separate high-purity oxygen from the air through the process of pressurized adsorption and decompression desorption. Specifically, the working process of the medical molecular sieve oxygen production system is as follows: First, the air is compressed by the compression system, then cooled by the cooling system, and then removed by the filtration system. Impurities and oxides. The compressed air enters the adsorption tower equipped with molecular sieves. The molecular sieves adsorb nitrogen in the air under high pressure, while oxygen passes and is collected in the form of gas. When the adsorption tower reaches saturation, the nitrogen is released through the desorption process, and the adsorption tower restores its adsorption capacity. This process is usually carried out alternately through two adsorption towers (or even multiple ones). When one is adsorbing, the other is desorbing. By controlling the opening and closing of the pneumatic valve, container A is in the adsorption process while container B is in the desorption process, and vice versa, so that compressed air alternates into the adsorption tower to achieve air separation, thereby continuously producing oxygen-enriched air with a high oxygen content.

[0004] The existing mainframe pipelines of medical molecular sieve oxygen production system products are all connected by welding, which has the disadvantages of large assembly workload, high manpower and production consumables costs, high welding pollution, industrialized appearance and relatively large floor space.

[0005] In the medical molecular sieve oxygen production industry, welding pipelines are widely used. The oxygen production host is mainly composed of an adsorption tower and a host pipeline. Please refer to Chinese patent applications 202311311614.7 and 202111576414.5. The host pipeline is mainly composed of valves and various pipe fittings. Since the opening and closing logic of the various functional control valves of the oxygen production host is relatively complex, the host pipeline is generally connected by welding. All pipe fittings and valves are welded in sequence to form an intuitive and clear single passage. Although this method is widely used, it also has many technical deficiencies, such as:

[0006] 1. Welding pipelines have the risk of deflagration when transporting high-concentration oxygen. In addition, the production workload is large, the labor cost is high, and there are many pipe fittings and valve groups that need to be welded, which requires a lot of manpower and material resources and takes a lot of time to weld and assemble.

[0007] 2. Welding accuracy and product consistency are difficult to guarantee, and welding will cause pollution.

[0008] 3. After welding, the overall welding needs to be completed and then the welding tightness of each part needs to be checked. If there is a leak, it needs to be repaired.

[0009] 4. The main engine pipeline is relatively large, taking up more space and causing space waste.

[0010] 5. The main engine pipeline is relatively heavy and often requires lifting equipment to cooperate with production.

[0011] 6. The pipelines are fixed, which makes it inconvenient to verify the product development and upgrade. Summary of the invention

[0012] The purpose of the present application is to provide a split modular valve and a molecular sieve oxygen concentrator thereof. The split modular valve can be a machined part that can be completed in one-time processing, with easy control of precision and simple installation. It is convenient to adjust, especially when the molecular sieve oxygen concentrator has many and complex pipelines, which can save manpower, reduce pollution and reduce volume.

[0013] In order to achieve the above-mentioned purpose of the invention, the present application provides a split modular valve, including a square valve body, the valve body is provided with an internal main channel and a plurality of branch channels, the branch channels are used to connect to external pipelines; a valve controller is provided between the main channel and each branch channel, and the connection and closure between the main channel and the branch channels are completed by opening and closing the valve controller. The plurality of branch channels are arranged in a plane, and are located above the main channel in a direction perpendicular to the main channel; the main channel is also provided with an output interface vertically downward, and is perpendicular to the plane where the plurality of branch channels are located, for connecting to an external output pipeline. The split modular valves are all made of aluminum alloy. The valve controller is an angle valve pneumatic controller or a cylinder pneumatic controller.

[0014] The top of the valve controller is made of silicone material for soft sealing, and its sealing surface is a chamfered surface; a chamfered surface is correspondingly provided on the main channel to achieve a surface sealing fitting mode. Preferably, it can be set to a 45-degree chamfered surface.

[0015] In order to achieve the above-mentioned purpose of the invention, the present application also provides a molecular sieve oxygen generator, characterized in that it includes several of the above-mentioned split modular valves. Furthermore, the split modular valves are two or more arranged in series to form a split modular valve group; the outer surface of the split modular valve is provided with a sealing ring installation groove on the valve body located around the end of the branch channel, and the sealing between the stacked split modular valves is completed by the sealing ring. There are several screw holes on the square valve body, and the split modular valves are fixedly connected together by passing hexagon socket bolts. The split modular valve can also be two split modular valve groups arranged in pairs, and the output interfaces of the two split modular valves are connected through output pipes.

[0016] In actual application, there are 6 split module valves used in molecular sieve oxygen generators. Each split module valve is generally provided with two branch channels, which are respectively connected to the gas paths of the gas collecting pipes of the two adsorption towers of the molecular sieve oxygen generator;

[0017] The first split modular valve and the fourth split modular valve are respectively locked and sealed at the ends of the upper gas collecting pipe and the lower gas collecting pipe of the molecular sieve oxygen generator by bolts, and the output interfaces of the first split modular valve and the fourth split modular valve are connected through an output pipeline; by opening the valve controller on the diagonal side, the pressure in the adsorption tower can be released to the other side, so that the pressure of the other adsorption tower can be quickly increased without wasting pressure.

[0018] The second split modular valve is an oxygen production valve, which outputs the oxygen produced by the corresponding adsorption tower through the valve controller; the third split modular valve is a cleaning valve, which allows the oxygen in the storage tank to enter the corresponding adsorption tower for cleaning through the valve controller; the fifth split modular valve is an exhaust valve, which discharges the nitrogen produced by the corresponding adsorption tower through the valve controller; the sixth split modular valve is the air intake valve of the molecular sieve oxygen generator, which is connected to the air source compression system and completes the air intake of the corresponding adsorption tower through the valve controller;

[0019] The second split modular valve, the third split modular valve, the fifth split modular valve and the sixth split modular valve can all be fixed to the side surfaces of other split modular valves by means of bolt sealing.

[0020] As another improvement of the above technical solution, the split modular valves are all made of aluminum alloy.

[0021] To achieve the above-mentioned purpose of the invention, the present application also provides a molecular sieve oxygen generator, wherein a plurality of paired air holes are provided on the surface of the gas collecting pipes of the two adsorption towers of the molecular sieve oxygen generator, and a split modular valve is provided on a pair of air holes; there are 6 split modular valves, wherein the first split modular valve and the fourth split modular valve are respectively locked and sealed on the surface of the upper gas collecting pipe and the lower gas collecting pipe of the molecular sieve oxygen generator by bolts, and the output interfaces of the first split modular valve and the fourth split modular valve are connected by an output pipeline; by opening the cylinder pneumatic controller on the diagonal side, the gas in the adsorption tower on one side can be released to the adsorption tower on the other side;

[0022] The second split modular valve is an oxygen producing valve, which outputs the oxygen produced by the corresponding adsorption tower through the cylinder pneumatic controller;

[0023] The third split modular valve is a cleaning valve, which allows the oxygen in the storage tank to enter the corresponding adsorption tower for cleaning through the cylinder pneumatic controller;

[0024] The fifth split modular valve is an exhaust valve, which discharges the nitrogen produced by the corresponding adsorption tower through the cylinder pneumatic controller;

[0025] The sixth split modular valve is the air intake valve of the molecular sieve oxygen generator, which is connected to the air source compression system and completes the air intake of the corresponding adsorption tower through the cylinder pneumatic controller.

[0026] The outer surface of the square valve body is provided with a sealing ring installation groove around the end of the branch channel, and the sealing between the valve body and the gas collecting pipe is completed by the sealing ring.

[0027] The advantages of the present application are that the split modular valve with an integrally formed structure is a machined part, and mass production can be produced by CNC lathe processing, reducing the production workload. The split modular valve of the present application exists in a split form, and is stacked when used. The sealing method is simple and reliable, and can be used in any combination.

[0028] Because the split modular valve integrates the pipeline into the valve body, its volume is much smaller than that of conventional pipelines. Secondly, the aluminum alloy material used further reduces the mass; it also avoids the environmental pollution caused by welding.

[0029] In short, compared with the existing welded main pipeline, the present application is small in size, relatively light in weight, and the difficulty of installation is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic structural diagram of a split modular valve according to a first embodiment of the present application is shown;

[0031] Figure 2 A semi-transparent three-dimensional schematic diagram showing a combination of two split modular valves according to a first embodiment of the present application;

[0032] Figure 3 It shows a schematic structural diagram of the combined use of the split-type modular valve in the first embodiment of the present application;

[0033] Figure 4 It is a schematic diagram of gas path switching of two split-type modular valve combinations in the first embodiment of the present application;

[0034] Figure 5 It is a partial installation diagram of the angle valve pneumatic controller of the split modular valve of the first embodiment of the present application;

[0035] Figure 6 This is a schematic diagram of the structure of the split-type modular valve after assembly according to the first embodiment of the present application;

[0036] Figure 7 It is a schematic diagram of the structure of the gas collecting pipe of the molecular sieve oxygen generator;

[0037] Figure 8 It is a structural schematic diagram of a split modular valve assembly at the end of a gas collecting pipe of a molecular sieve oxygen generator according to the first embodiment of the present application;

[0038] Fig. 9 A schematic diagram of the partial structure of the gas collecting pipe of the molecular sieve oxygen generator of the second embodiment of the present application is shown;

[0039] Fig.10 A semi-transparent stereoscopic schematic diagram showing a split module valve assembly on a gas collecting pipe in a molecular sieve oxygen generator according to a second embodiment of the present application;

[0040] Fig.11 A schematic diagram of the structure of a split module valve in a molecular sieve oxygen generator according to a second embodiment of the present application is shown;

[0041] Fig.12 It is a schematic diagram of gas path switching of two split modular valve combinations in the second embodiment of the present application;

[0042] Fig.13 It is a partial installation diagram of the cylinder pneumatic controller of the second embodiment of the present application.

[0043] Figure ID

[0044] 1. First module valve 2. Second module valve 3. Third module valve

[0045] 4. Fourth module valve 5. Fifth module valve 6. Sixth module valve

[0046] 7. Square valve body 8. Main channel 9. Branch channel

[0047] 10. Valve controller 11. Output interface 12. Hexagon socket bolt

[0048] 13. Chamfered surface 14. Sealing ring installation groove 15. Sealing ring

[0049] 16. Gas collecting pipe 17. Screw hole DETAILED DESCRIPTION

[0050] The technical solution of the present application is described in detail below in conjunction with the accompanying drawings and embodiments. In these drawings, the same or similar components are marked with the same or similar reference numerals.

[0051] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. In the following embodiments, the angle valve pneumatic controller is a part of the standard angle seat valve and can be modified and customized; the cylinder pneumatic controller is a modified and customized cylinder. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0052] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0053] The first embodiment takes the angle valve pneumatic controller as an example. Figure 1 , Figure 7 and Figure 8 As shown, the valve body 7 of the split modular valve of the present application can be a machined part, and the branch channel 9 of the modular valve is connected to the gas path of the oxygen generator main unit gas collecting pipe 16, forming a straight line, and is arranged vertically with the main channel 8 and the valve controller 10. The valve body 7 of the split modular valve has two installation holes and sealing positions for the valve controllers 10, and the two towers are connected through the gas path of the main channel 8. The middle of the modular valve is an output interface 11, which can be used as an inlet and outlet. The gas pressure equalization and inlet and outlet of the main unit pipeline are completed by opening and closing the designed gas path and the valve controller 10. The single side of the modular valve is connected, and the valve controller 10 is the interface for sealing the gas exchange between the two towers. Each controller can only block the gas from entering the current modular valve.

[0054] like Figure 2 , Figure 3 and Figure 8 As shown, a sealing ring installation groove 14 is designed on the valve body 7 of the module valve, the valve bodies 7 of the first module valve 1 and the fourth module valve 4 are respectively fixedly connected to one side of the gas collecting pipe 16 of the oxygen generator, and a sealing ring 15 is installed at the connection. A sealing ring 15 is installed between the second module valve 2 and the third module valve 3, and between the fifth module valve 5 and the sixth module valve 6, so that multiple module valves can be stacked and connected for use, and the valve body 7 of the module valve and the gas collecting pipe 16 are locked and connected by screws.

[0055] The first module valve 1 and the fourth module valve 4 are connected by a pipeline. By opening the valve controller on the diagonal side, the module valve passage is opened to release the pressure in the adsorption tower to the other side, so that the pressure of the other adsorption tower is quickly increased without wasting pressure. Figure 4 shown.

[0056] The second module valve 2 is an oxygen production valve, which produces oxygen by opening and closing the controllers corresponding to the two towers on this valve. A one-way valve is installed to transport the produced oxygen to the storage tank through a pipeline.

[0057] The third module valve 3 is a cleaning valve, which is opened and closed by the controllers corresponding to the two towers on this valve, opening the passage to allow the oxygen in the storage tank to enter the molecular sieve tower through the pipeline to clean the molecular sieve tower.

[0058] The fifth module valve 5 is an exhaust valve, which is opened and closed by the controllers corresponding to the two towers to exhaust nitrogen.

[0059] The sixth module valve 6 is the main engine air intake valve, which is connected to the air source compression system and is opened and closed by the corresponding controllers to complete the air intake of the two towers.

[0060] like Figure 5 As shown, when in use, first install the valve controller 10 on a single module valve. When assembling the valve controller 10, it is necessary to set a control air source for the controller so that the controller is in a normally open state. The valve controller 10 is installed on the module valve through its own external thread. The threaded installation compresses the sealing gasket to seal the connection between the controller and the module valve.

[0061] like Figure 6 As shown, after each set of modular valves and valve controller 10 are installed, multiple sets of modular valves are connected in series for use and testing according to the designed usage mode. The modular valves are first connected by inner bolts 12, and can be directly installed on the oxygen concentrator gas collecting pipe without disassembly after the sealing test, so as to maintain the sealing before and after the test. The modular valves are connected in series, and O-type sealing rings are installed at the gas path connection. The sealing effect is achieved by compressing the sealing rings, so that the gas can flow without leakage.

[0062] In this embodiment, the sealing surface of the valve controller 10 can be made of silicone material for soft sealing. The sealing surface is a 45-degree chamfered surface 13 at the top of the silicone pad, which fits with the 45-degree chamfered surface on the module valve. The angle valve pneumatic controller seals the module valve to block the gas from flowing from one side to the other without affecting the gas flow to the same side of the next module valve.

[0063] The second embodiment, as Fig. 9 and Fig.11As shown, the valve body 7 of the modular cylinder valve of the present application can be a machined part, and the branch channel 9 of the cylinder valve and the cylinder valve controller 1010 are in a straight line, perpendicular to the gas path and the main channel 8 of the oxygen generator main unit gas collecting pipe 16. The valve body 7 of the modular cylinder valve has two installation holes and sealing positions for the valve controllers 10, and the gas collecting pipes 16 of the two towers of the oxygen generator main unit are connected through the gas path of the branch channel 9. The output interface 11 is in the middle of the cylinder valve, which can be used as an inlet and outlet. The gas pressure equalization and the inlet and outlet of the main unit pipeline are completed by opening and closing the designed gas path and the cylinder pneumatic controller. The single side of the cylinder valve is connected, and the cylinder pneumatic controller is the interface for sealing the gas exchange between the two towers. Each controller can only block the gas from entering the current cylinder valve.

[0064] like Fig.10 As shown, a sealing ring installation groove 14 is designed on the valve body 7 of the cylinder valve, a sealing ring 15 is installed between the first cylinder valve 1 and the fourth cylinder valve 4 and the gas collecting pipe 16, and the valve body 7 of the cylinder valve and the gas collecting pipe 16 are connected by screw locking.

[0065] The first cylinder valve 1 and the fourth cylinder valve 4 are connected by a pipeline. By opening the valve controller 10 on the diagonal side, the cylinder valve passage is opened to release the pressure in the adsorption tower to the other side, so that the pressure of the other adsorption tower is quickly increased without wasting pressure. Fig.12 shown.

[0066] The second cylinder valve 2 is an oxygen production valve, which produces oxygen by opening and closing the controllers corresponding to the two towers on this valve. A one-way valve is installed to transport the produced oxygen to the storage tank through a pipeline.

[0067] The third cylinder valve 3 is a cleaning valve, which is opened and closed by the controllers corresponding to the two towers on this valve, opening the passage to allow the oxygen in the storage tank to enter the molecular sieve tower through the pipeline to clean the molecular sieve tower.

[0068] The fifth cylinder valve 5 is an exhaust valve, and nitrogen is discharged by opening and closing the controllers corresponding to the two towers on this valve.

[0069] The sixth cylinder valve 6 is the main engine air intake valve, which is connected to the air source compression system and is opened and closed by the corresponding controllers to complete the air intake of the two towers.

[0070] Six cylinder valves are listed above. In actual applications, they can be increased or decreased according to the needs of the oxygen concentrator.

[0071] like Fig.13 As shown, when in use, first install the valve controller 10 on each cylinder valve. When assembling the valve controller 10, it is necessary to set the control air source for the controller so that the controller is in a normally open state. The valve controller 10 is installed on the cylinder valve through the mounting hole provided by the valve controller 10 itself. An O-ring is installed at the lower end of the cylinder to seal with the mounting hole on the cylinder valve. The entrance of the mounting hole of the cylinder valve has rounded corners to facilitate the installation of the controller.

[0072] The cylinder valve is connected to the gas collecting pipe 16, and a sealing ring installation groove and a cylinder valve installation hole are processed on the gas collecting pipe 16. The sealing and fixing are completed by screw locking and compressing the sealing ring.

[0073] In this embodiment, the sealing surface of the valve controller 10 can be made of silicone material for soft sealing. The sealing surface is a 45-degree chamfered surface 13 at the top of the silicone pad. Fig.11 As shown, the valve controller 10 fits with the 45-degree chamfered surface on the cylinder valve and adopts a face sealing method. The valve controller 10 seals the cylinder valve to block the gas from flowing from one side to the other side without affecting the gas flow to the same side of the next cylinder valve.

[0074] The modular valve of this application is a machined part, and mass production can be produced by CNC lathe processing, reducing the production workload. The soft sealing method of the angle valve pneumatic controller and the modular valve is simple and reliable. The machined modular valve replaces the existing welding pipeline technology, which is environmentally friendly. The small size and relatively light weight, the method of first binding multiple modules and then installing them as a whole to the oxygen generator host reduces the difficulty of installation, such as Figure 8-9 As shown. The modular valve can be installed in series or in parallel with one or more valves, and can be used in any combination, which can be easily verified for research and development. The appearance is simple and advanced.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application is described in detail with reference to the embodiments, a person skilled in the art should understand that any modification or equivalent replacement of the technical solution of the present application does not depart from the spirit and scope of the technical solution of the present application and should be included in the scope of the claims of the present application.

Claims

1. A split modular valve, comprising a square valve body, wherein the valve body is provided with an internal main channel and a plurality of branch channels, wherein the branch channels are used to connect to external pipelines; a valve controller is provided between the main channel and each branch channel, and the connection and closure between the main channel and the branch channels are completed by opening and closing the valve controller.

2. The split modular valve according to claim 1, characterized in that: The plurality of branch channels are arranged in a plane and are located above the main channel in a direction perpendicular to the main channel. The main channel is also provided with an output interface vertically downward and perpendicular to the plane where the branch channels are located, for connecting to an external output pipeline.

3. The split modular valve according to claim 1 or 2, characterized in that: The top of the valve controller is made of silicone material for soft sealing, and its sealing surface is a chamfered surface; the main channel is correspondingly provided with a chamfered surface.

4. The split modular valve according to claim 1 or 2, characterized in that: The split modular valves are all made of aluminum alloy.

5. The split modular valve according to claim 1 or 2, characterized in that: The valve controller is an angle valve pneumatic controller or a cylinder pneumatic controller.

6. The split modular valve according to claim 1, characterized in that: The split modular valve is two split modular valve groups arranged in pairs, and the output interfaces of the two split modular valves are connected through an output pipeline.

7. A molecular sieve oxygen generator, characterized in that: The invention comprises several split modular valves as claimed in claims 1 to 6, wherein the valve body of each split modular valve is provided with two branch channels, which are respectively used to connect the gas collecting pipes of two adsorption towers of the molecular sieve oxygen generator.

8. The molecular sieve oxygen generator according to claim 7, characterized in that: There are 6 split-type modular valves; among them, The first split module valve and the fourth split module valve are respectively locked and sealed at the ends of the upper gas collecting pipe and the lower gas collecting pipe of the molecular sieve oxygen generator by bolts, and the output interfaces of the first split module valve and the fourth split module valve are connected through an output pipeline; the gas in the adsorption tower on one side can be released to the adsorption tower on the other side by opening the valve controller on the diagonal side; The second split modular valve is an oxygen producing valve, which outputs the oxygen produced by the corresponding adsorption tower through the valve controller; The third split modular valve is a cleaning valve, which allows the oxygen in the storage tank to enter the corresponding adsorption tower for cleaning through the valve controller; The fifth split modular valve is an exhaust valve, which discharges the nitrogen produced by the corresponding adsorption tower through the valve controller; The sixth split modular valve is the air intake valve of the molecular sieve oxygen generator, which is connected to the air source compression system and completes the air intake of the corresponding adsorption tower through the valve controller; The second split modular valve, the third split modular valve, the fifth split modular valve and the sixth split modular valve can all be fixed to the side of other split modular valves by bolt sealing; The outer surface of the split modular valve is provided with a sealing ring installation groove on the valve body around the end of the branch channel, and the sealing ring is used to complete the sealing between the stacked split modular valves.

9. The molecular sieve oxygen generator according to claim 7, characterized in that: The surfaces of the gas collecting pipes of the two adsorption towers of the molecular sieve oxygen generator are provided with a plurality of pairs of air holes, and a split module valve is arranged on a pair of air holes; there are 6 split module valves, among which: The first split module valve and the fourth split module valve are respectively locked and sealed on the surface of the upper gas collecting pipe and the lower gas collecting pipe of the molecular sieve oxygen generator by bolts, and the output interfaces of the first split module valve and the fourth split module valve are connected through an output pipeline; the gas in the adsorption tower on one side can be released to the adsorption tower on the other side by opening the valve controller on the diagonal side; The second split modular valve is an oxygen producing valve, which outputs the oxygen produced by the corresponding adsorption tower through the valve controller; The third split modular valve is a cleaning valve, which allows the oxygen in the storage tank to enter the corresponding adsorption tower for cleaning through the valve controller; The fifth split modular valve is an exhaust valve, which discharges the nitrogen produced by the corresponding adsorption tower through the valve controller; The sixth split modular valve is the air intake valve of the molecular sieve oxygen generator, which is connected to the gas source compression system and completes the air intake of the corresponding adsorption tower through the valve controller.

10. The molecular sieve oxygen generator according to claim 7, characterized in that: The outer surface of the square valve body is provided with a sealing ring installation groove around the end of the branch channel, and the sealing between the valve body and the gas collecting pipe is completed by the sealing ring.

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