A vacuum pressure swing adsorption oxygen generator

Abstract

This invention discloses a vacuum pressure swing adsorption (VSA) oxygen generator, belonging to the technical field of oxygen generation devices. The VSA oxygen generator includes a gas compressor, a compressed gas tank, and a first adsorption tower. One side of the gas compressor is fixedly connected to the compressed gas tank via a pipe. Through a structure equipped with filter cartridges, the device sequentially uses one filter cartridge to filter the air. When the filtration effect of one filter cartridge deteriorates, the remaining filter cartridges are switched on via a mounting plate for filtration. Through a structure equipped with a vacuum tower, when the vacuum tower evacuates and depressurizes the first adsorption tower, clean air inside re-enters the already used filter cartridge through a backflush pipe, thus cleaning the filter cartridge in reverse and restoring its cleaning function to some extent. The airflow through the backflush pipe can be adjusted to reduce damage to the filter cartridge.

Description

Technical Field

[0001] This invention relates to the field of oxygen generation equipment technology, and more specifically, to a vacuum pressure swing adsorption oxygen generator. Background Technology

[0002] A vacuum pressure swing adsorption (VSA) oxygen generator is a device that uses vacuum pressure swing adsorption technology to separate and extract oxygen from the air. It mainly consists of components such as an adsorption tower, molecular sieve, vacuum pump, blower, programmable valves, and control system.

[0003] When producing oxygen at high altitudes, the air pressure is low, and the oxygen in the air does not react fully with the reactants inside the adsorption tower. Therefore, an oil-free compressor is usually installed at the front end of the adsorption tower to compress the air to increase the pressure for adsorption and oxygen production. However, the air needs to be filtered before entering the adsorption tower. Compressed air contains more moisture and dust impurities. Large particles of dust and water vapor entering the filter cartridge can cause the filter cartridge to clog quickly, thus affecting the subsequent oxygen exchange efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a vacuum pressure swing adsorption oxygen generator to solve the problems mentioned in the background art.

[0005] A vacuum pressure swing adsorption oxygen generator includes a gas compressor, a compressed gas tank, and a first adsorption tower. One side of the gas compressor is fixedly connected to the compressed gas tank via a pipe. The compressed gas tank is equipped with an oxygen valve and is connected to a gas replacement pipe via the oxygen valve. One end of the gas replacement pipe is fixedly connected to the first adsorption tower, and the other end of the gas replacement pipe is fixedly connected to a second adsorption tower. A vacuum tower is provided at the rear of the gas replacement pipe.

[0006] An mounting plate is provided on the upper side of the inner cavity of the compressed gas tank. Several filter cartridges are arranged in a ring at the lower end of the mounting plate. A second electrically controlled valve is fixedly installed on the upper end of each filter cartridge. A filter element is clamped in the middle of each filter cartridge. A third electrically controlled valve is fixedly installed on the lower end of each filter cartridge. A central pipe is fixedly installed on the lower end of the third electrically controlled valve. A backflush pipe is fixedly installed on the lower end of the inner cavity of the compressed gas tank. A connecting pipe is fixedly installed on the upper side of the backflush pipe. A flow divider is fixedly installed on the upper side of the connecting pipe. A backwash plate is fixedly installed on the flow divider at the position of the filter cartridge. A pressure dividing module is fixedly installed on the top of the vacuum tower.

[0007] Furthermore, the tops of the first and second adsorption towers are fixedly connected by a gas circulation rack, and the side of the gas circulation rack is connected to the oxygen storage tower via a pipe.

[0008] By adopting the above technical solution, the gas replacement pipe can control whether oxygen enters the first adsorption tower or the second adsorption tower. At the same time, the gas circulation rack can control the oxygen produced by the first or second adsorption tower to enter the oxygen storage tower through the pipeline, thereby storing the oxygen and facilitating subsequent filling and processing.

[0009] Furthermore, a main control device is fixedly installed at the front center of the first and second adsorption towers, a detection box is fixedly installed at the rear center of the compressed gas tank, a filter liner is fixedly installed at the center of the inner cavity of the compressed gas tank, a booster pipe is fixedly installed around the lower periphery of the filter liner, the upper end of the booster pipe is fixedly connected to an oxygen valve, a stabilizing plate is fixedly installed at the center of the inner cavity of the booster pipe, and the lower end of the central pipe extends through the stabilizing plate to the lower side of the filter liner. The main control device and the detection box constitute a main control module.

[0010] By adopting the above technical solution, the main control device and the detection box can send signals to the internal electronic control device to open and close after receiving a signal.

[0011] Furthermore, the upper end of the compressed gas tank is rotatably provided with an upper cover, the lower end of the compressed gas tank is fixedly installed with three adjusting feet, an air inlet pipe is fixedly installed on one side of the upper end of the compressed gas tank, a flow divider is fixedly installed at one end of the air inlet pipe, and the lower end of the flow divider is connected to the second electrically controlled valve on the lower side through four pipes respectively.

[0012] By adopting the above technical solution, the height of the compressed gas tank can be increased by adjusting the feet, and the air inlet pipe can be connected to the corresponding filter cartridge by the second electric control valve, so that the air can be filtered in sequence.

[0013] Furthermore, the backwash plate has an arc-shaped structure, and the side of the backwash plate is clamped onto the side of the filter cylinder. The side of the backwash plate has several flushing holes equidistantly opened, and the side of the filter cylinder is fixedly installed with a connecting air pipe corresponding to the flushing holes. The connecting air pipe has an inward one-way valve structure.

[0014] By adopting the above technical solution, gas can be reversed and introduced into the inside of the filter cartridge through the backwash plate, thereby reverse-flowing gas into the filter element, allowing some air pollutants to be separated and discharged from the filter element.

[0015] Furthermore, the connecting pipe is connected to four backwash plates via air pipes, and a fourth electrically controlled valve is fixedly installed on the diverter plate at the connection between the connecting pipe and the backwash plates. The backwash plates, vacuum tower, and backwash pipe constitute a backwash module.

[0016] By adopting the above technical solution, the fourth electrically controlled valve can control the connection between the backwash plate and the connecting pipe, thereby facilitating the exhaust of the designated air filter device.

[0017] Furthermore, the pressure-splitting module includes a connecting cover fixedly installed on the top of the vacuum tower. A vacuum tube is fixedly installed in the middle of the rear side of the connecting cover. A pressure-reducing component is fixedly installed on the outer side of the middle of the vacuum tube. A flow-dividing groove is opened in the middle of the vacuum tube. A small electric push rod is fixedly installed on the rear side of the inner cavity of the pressure-reducing component. A sealing plate is fixedly installed on the front side of the small electric push rod. A connecting pipe is fixedly installed on the rear side of the pressure-reducing component. A pressure relief pipe is fixedly installed on the side of the pressure-reducing component. The sealing plate has an annular structure. The connecting pipe and the backflush pipe are connected by a pipeline. A backflush valve is fixedly installed at the rear end of the backflush pipe.

[0018] By adopting the above technical solution, the opening size of the diversion groove can be controlled by changing the position of the sealing plate, so that the exhaust gas can be depressurized appropriately. At the same time, the gas discharged from the vacuum tube can enter the middle of the backflushing tube through the connecting pipe.

[0019] Furthermore, a cleaning pipe is fixedly installed on the upper side of the filter cartridge, a first electrically controlled valve is fixedly installed in the middle of the cleaning pipe, an annular exhaust pipe is fixedly installed at the upper end of the cleaning pipe, and an exhaust pipe is fixedly installed on the side of the annular exhaust pipe. The annular exhaust pipe has an annular structure, and the cleaning pipe, the first electrically controlled valve, and the annular exhaust pipe constitute an exhaust module.

[0020] By adopting the above technical solution, an exhaust module can be formed through the first electrically controlled valve, thereby facilitating the discharge of backwash exhaust gas.

[0021] Furthermore, the first adsorption tower, the gas replacement pipe, and the second adsorption tower constitute an oxygen generation module, and a filtration detection module is installed inside the filter cartridge.

[0022] By adopting the above technical solution, the main control device can collect data between internal modules, thereby controlling the operation of different internal modules.

[0023] Furthermore, a fixing rod is fixedly installed in the middle of the mounting plate, and the lower end of the fixing rod is clamped to the connecting pipe.

[0024] By adopting the above technical solution, the fixing rod can play a role in limiting and stabilizing the connecting pipe.

[0025] Compared with the prior art, the advantages of this invention are:

[0026] 1. In this invention, by providing a structure with filter cartridges, the device will use one of the filter cartridges in sequence to filter the air. When the filtration effect of one filter cartridge becomes poor, the remaining filter cartridges will be switched on through the mounting plate to perform filtration.

[0027] 2. In this invention, by setting up a structure with a vacuum tower, when the vacuum tower evacuates and depressurizes the first adsorption tower, the clean air inside will re-enter the used filter element through the backflush pipe, thereby cleaning the filter element in reverse and restoring the cleaning function of the filter element to a certain extent.

[0028] 3. By incorporating a pressure divider module, the airflow through the backwash pipe can be adjusted to reduce damage to the filter element. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the structure of the compressed gas tank of the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the filter cartridge of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of the filter inner liner of the present invention;

[0033] Figure 5 For the present invention Figure 4 Schematic diagram of the structure at point A in the diagram;

[0034] Figure 6 This is a schematic diagram of the structure of the flow divider of the present invention;

[0035] Figure 7 This is a schematic diagram of the vacuum tower structure of the present invention;

[0036] Figure 8 This is a schematic diagram of the pressure-reducing component of the present invention;

[0037] Figure 9 This is a schematic diagram of the annular exhaust pipe of the present invention;

[0038] Figure 10 This is a schematic diagram of the device module structure of the present invention.

[0039] Explanation of the numbers in the diagram: 1. Gas compressor; 2. Compressed gas tank; 3. Top cover; 4. Adjustable feet; 5. First adsorption tower; 6. Gas replacement pipe; 601. Gas circulation frame; 7. Second adsorption tower; 8. Main control device; 9. Vacuum tower; 901. Connecting cover; 902. Vacuum pipe; 10. Oxygen storage tower; 11. Inlet pipe; 12. Exhaust pipe; 13. Oxygen valve; 14. Detection box; 15. Backflush valve; 16. Backflush pipe; 17. Mounting plate; 18. Filter cartridge; 1801. Cleaning pipe; 1802. 19. Fixed rod; 20. Diverter; 21. Filter element; 22. Filter inner liner; 23. Pressure booster pipe; 24. Connecting pipe; 25. Stabilizing plate; 26. Centralizing pipe; 27. Second electric valve; 28. Third electric valve; 29. ​​Backwash plate; 2901. Connecting air pipe; 30. Fourth electric valve; 31. Diverter plate; 32. Flushing hole; 33. Pressure reducing component; 3301. Diverter groove; 3302. Sealing plate; 3303. Small electric push rod; 34. Connecting pipe; 35. Pressure relief pipe; 36. Annular exhaust pipe. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] like Figures 1-10 As shown, the embodiment of the present invention provides: including a gas compressor 1, a compressed gas tank 2 and a first adsorption tower 5. One side of the gas compressor 1 is fixedly connected to the compressed gas tank 2 through a pipe. The compressed gas tank 2 is provided with an oxygen valve 13. The compressed gas tank 2 is connected to a gas replacement pipe 6 through the oxygen valve 13. One end of the gas replacement pipe 6 is fixedly connected to the first adsorption tower 5, and the other end of the gas replacement pipe 6 is fixedly connected to a second adsorption tower 7. A vacuum tower 9 is provided on the rear side of the gas replacement pipe 6.

[0042] An installation plate 17 is provided on the upper side of the inner cavity of the compressed gas tank 2. Several filter cylinders 18 are arranged in a ring at the lower end of the installation plate 17. A second electric control valve 27 is fixedly installed at the upper end of the filter cylinder 18. A filter element 21 is clamped in the middle of the filter cylinder 18. A third electric control valve 28 is fixedly installed at the lower end of the filter cylinder 18. A central pipe 26 is fixedly installed at the lower end of the third electric control valve 28. A backflushing pipe 16 is fixedly installed at the lower end of the inner cavity of the compressed gas tank 2. A connecting pipe 24 is fixedly installed on the upper side of the backflushing pipe 16. A flow divider 31 is fixedly installed on the upper side of the connecting pipe 24. A backflushing plate 29 is fixedly installed on the flow divider 31 at the position of the filter cylinder 18. A pressure dividing module is fixedly installed on the top of the vacuum tower 9.

[0043] The tops of the first adsorption tower 5 and the second adsorption tower 7 are fixedly connected by a gas circulation frame 601. The side of the gas circulation frame 601 is connected to the oxygen storage tower 10 through a pipe. The gas replacement pipe 6 can control whether oxygen enters the first adsorption tower 5 or the second adsorption tower 7. At the same time, the gas circulation frame 601 can control the oxygen produced by the first adsorption tower 5 or the second adsorption tower 7 to enter the oxygen storage tower 10 through the pipe, thereby storing the oxygen for subsequent filling and processing.

[0044] A main control device 8 is fixedly installed at the front middle of the first adsorption tower 5 and the second adsorption tower 7. A detection box 14 is fixedly installed at the rear middle of the compressed gas tank 2. A filter liner 22 is fixedly installed in the middle of the inner cavity of the compressed gas tank 2. A booster pipe 23 is fixedly installed around the lower periphery of the filter liner 22. The upper end of the booster pipe 23 is fixedly connected to the oxygen valve 13. A stabilizing plate 25 is fixedly installed in the middle of the inner cavity of the booster pipe 23. The lower end of the central pipe 26 extends through the stabilizing plate 25 to the lower side of the filter liner 22. The main control device 8 and the detection box 14 form a main control module. After receiving a signal, the main control device 8 and the detection box 14 can send a signal to the internal electrical control device to open and close it.

[0045] The upper end of the compressed gas tank 2 is rotatably equipped with an upper cover 3, and the lower end of the compressed gas tank 2 is fixedly installed with three adjusting feet 4. An air inlet pipe 11 is fixedly installed on one side of the upper end of the compressed gas tank 2, and a diverter 20 is fixedly installed at one end of the air inlet pipe 11. The lower end of the diverter 20 is connected to the second electric control valve 27 on the lower side through four pipes. The height of the compressed gas tank 2 can be raised by adjusting the feet 4, and the air inlet pipe 11 can be connected to the corresponding filter cartridge 18 by the second electric control valve 27, so that the air can be filtered in sequence.

[0046] The backwash plate 29 has an arc-shaped structure. The side of the backwash plate 29 is clamped to the side of the filter cartridge 18. Several flushing holes 32 are equidistantly opened on the side of the backwash plate 29. A connecting air pipe 2901 corresponding to the flushing holes 32 is fixedly installed on the side of the filter cartridge 18. The connecting air pipe 2901 has an inward one-way valve structure. Gas can be reverse-sent to the inside of the filter cartridge 18 through the backwash plate 29, thereby reverse-sent to a set of filter elements 21, so that some pollutants in the air can be separated and discharged from the filter elements 21.

[0047] The connecting pipe 24 is connected to four backwash plates 29 via air pipes. The diverter plate 31 is located at the connection between the connecting pipe 24 and the backwash plates 29 and is fixedly installed with a fourth electrically controlled valve 30. The backwash plates 29, the vacuum tower 9, and the backwash pipe 16 form a backwash module. The fourth electrically controlled valve 30 can control the connection between the backwash plates 29 and the connecting pipe 24, thereby facilitating the exhaust of the designated air filter.

[0048] The pressure-dividing module includes a connecting cover 901 fixedly installed on the top of the vacuum tower 9. A vacuum tube 902 is fixedly installed in the middle of the rear side of the connecting cover 901. A pressure-reducing component 33 is fixedly installed on the outer side of the middle of the vacuum tube 902. A flow-dividing groove 3301 is opened in the middle of the vacuum tube 902. A small electric push rod 3303 is fixedly installed on the rear side of the inner cavity of the pressure-reducing component 33. A sealing plate 3302 is fixedly installed on the front side of the small electric push rod 3303. A connecting pipe 34 is fixedly installed on the rear side of the pressure-reducing component 33. A pressure relief pipe 35 is fixedly installed on the side of the pressure-reducing component 33. The sealing plate 3302 has an annular structure. The connecting pipe 34 and the backflushing pipe 16 are connected by a pipe. A backflushing valve 15 is fixedly installed at the rear end of the backflushing pipe 16. By changing the position of the sealing plate 3302, the opening size of the flow-dividing groove 3301 can be controlled, so that the exhaust gas can be appropriately depressurized. At the same time, the gas discharged from the vacuum tube 902 can enter the middle of the backflushing pipe 16 through the connecting pipe 34.

[0049] A cleaning pipe 1801 is fixedly installed on the upper side of the filter cartridge 18. A first solenoid valve 1802 is fixedly installed in the middle of the cleaning pipe 1801. An annular exhaust pipe 36 is fixedly installed at the upper end of the cleaning pipe 1801. An exhaust pipe 12 is fixedly installed on the side of the annular exhaust pipe 36. The annular exhaust pipe 36 has an annular structure. The cleaning pipe 1801, the first solenoid valve 1802 and the annular exhaust pipe 36 form an exhaust module. The exhaust module can be formed through the first solenoid valve 1802, so as to facilitate the discharge of backwash exhaust gas.

[0050] The first adsorption tower 5, the gas replacement pipe 6, and the second adsorption tower 7 form an oxygen generation module. The filter cylinder 18 is equipped with a filter detection module. The main control device 8 can collect data between the internal modules, thereby controlling the operation of different internal modules. A fixing rod 19 is fixedly installed in the middle of the mounting plate 17. The lower end of the fixing rod 19 is clamped to the connecting pipe 24. The fixing rod 19 can limit and stabilize the connecting pipe 24.

[0051] Working principle of this invention: After the device is set up, air can be compressed by the gas compressor 1. The compressed air enters the interior of the compressed gas tank 2 through the air inlet pipe 11. The filter module works. Four filter cylinders 18 are set on the lower side of the mounting plate 17. The filter element 21 is set inside the filter cylinder 18. The upper end of the filter cylinder 18 is connected to the flow divider 20 through the second solenoid valve 27. The detection box 14 is model DKX-C-10A. The main control device 8 is model M340. Through the detection box 14, it can control that only one filter cartridge 18 can enter at the same time. The gas will be filtered through the filter element 21 and then enter the space between the filter cartridge 18 and the filter element 21 from both sides of the filter element 21. At this time, the gas will enter the booster pipe 23 through the lower third electric control valve 28 and the central pipe 26. Then, the oxygen in the booster pipe 23 will enter the gas replacement pipe 6 through the oxygen valve 13. Then, the main control device 8 controls the opening and closing of the valve of the gas replacement pipe 6, so that the compressed air enters one of the oxygen generation modules of the first adsorption tower 5 to generate oxygen. The adsorption material inside the first adsorption tower 5 will adsorb nitrogen, carbon dioxide and other gases in the air. Then, the oxygen enters the oxygen storage tower 10 through the gas circulation rack 601.

[0052] After the device has been running for a period of time, the detection device inside the filter element 21 detects a decrease in the filtration capacity of the filter element 21. The detection device is model X-am5600. The backwashing module is activated. At this time, the detection box 14 will close the second solenoid valve 27 at the top of the current filter cartridge 18 and open the second solenoid valve 27 at the top of the next filter cartridge 18 clockwise, thus allowing continuous oxygen production. After the first adsorption tower 5 has been working for a period of time, the internal reaction material becomes saturated. At this time, the gas replacement pipe 6 will switch the internal pipeline to allow air to continue entering the second adsorption tower 7 for continuous oxygen production. At this time, the vacuum tower 9 will be activated and connected to the first adsorption tower 5 to evacuate the first adsorption tower 5, so that the nitrogen, carbon dioxide and other gases adsorbed by the reaction material will exit through the connecting cover 901. The exhaust gas is relatively pure and dry, free of impurities. It then enters the connecting pipe 24 through the backwash pipe 16. The main control module opens and closes the third solenoid valve 28, which corresponds to the fourth solenoid valve 30 and the first solenoid valve 1802. The airflow enters the corresponding filter cartridge 18 through the backwash plate 29 and the connecting air pipe 2901. At this time, the external air pressure is relatively high, and the large airflow flows in the reverse direction through the filter element 21. The exhaust gas then passes through the cleaning pipe 1801, along the annular exhaust pipe 36, and is discharged outward through the gas compressor 1. During the process of the airflow passing through the filter element 21, the dry airflow will carry away some of the water vapor and dust attached to the filter element 21, thereby restoring some of the filtration performance of the filter element 21 and increasing the reuse rate.

[0053] The movement of the sealing plate 3302 can be controlled by the small electric push rod 3303, thereby controlling the amplitude of the diversion groove 3301 and the vacuum tube 902. When the pressure divider module is activated, when the gap of the diversion groove 3301 is small, a large amount of air will enter the backwash tube 16 from the connecting pipe 34. When the gap of the diversion groove 3301 is large, a large amount of air will be discharged from the pressure relief pipe 35, thereby reducing the air intake of the backwash tube 16. Since the filter element 21 will inevitably be damaged to some extent during the backwashing process, the air intake of the backwash tube 16 can be reduced to reduce the wear of the filter element 21 in the early stage of its use. At the end of the life of the filter element 21, the air intake of the backwash tube 16 can be increased to obtain a better backwashing effect.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A vacuum pressure swing adsorption oxygen generator, comprising a gas compressor (1), a compressed gas tank (2), and a first adsorption tower (5), characterized in that: One side of the gas compressor (1) is fixedly connected to the compressed gas tank (2) through a pipe. The compressed gas tank (2) is equipped with an oxygen valve (13). The compressed gas tank (2) is connected to the gas replacement pipe (6) through the oxygen valve (13). One end of the gas replacement pipe (6) is fixedly connected to the first adsorption tower (5). The other end of the gas replacement pipe (6) is fixedly connected to the second adsorption tower (7). A vacuum tower (9) is provided on the rear side of the gas replacement pipe (6). The compressed gas tank (2) has an installation plate (17) on the upper side of its inner cavity. The lower end of the installation plate (17) is provided with a plurality of filter cylinders (18) arranged in a ring. The upper end of the filter cylinders (18) is fixedly installed with a second electric control valve (27). The middle part of the filter cylinders (18) is fitted with a filter element (21). The lower end of the filter cylinders (18) is fixedly installed with a third electric control valve (28). The lower end of the third electric control valve (28) is fixedly installed with a central pipe (26). The lower end of the inner cavity of the compressed gas tank (2) is fixedly installed with a backflush pipe (16). The upper side of the backflush pipe (16) is fixedly installed with a connecting pipe (24). The upper side of the connecting pipe (24) is fixedly installed with a flow divider plate (31). The position of the flow divider plate (31) located at the filter cylinder (18) is fixedly installed with a backwash plate (29). The top of the vacuum tower (9) is fixedly installed with a pressure dividing module. The connecting pipe (24) is connected to four backwash plates (29) via air pipes. The backwash plates (29), vacuum tower (9), and backwash pipe (16) form a backwash module. The pressure-splitting module includes a connecting cover (901) fixedly installed on the top of the vacuum tower (9). A vacuum tube (902) is fixedly installed in the middle of the rear side of the connecting cover (901). A pressure-reducing component (33) is fixedly installed on the outer side of the middle of the vacuum tube (902). A flow divider (3301) is opened in the middle of the vacuum tube (902). A small electric push rod (3303) is fixedly installed on the rear side of the inner cavity of the pressure reducing component (33). A sealing plate (3302) is fixedly installed on the front side of the small electric push rod (3303). A connecting pipe (34) is fixedly installed on the rear side of the pressure reducing component (33). A pressure relief pipe (35) is fixedly installed on the side of the pressure reducing component (33). The sealing plate (3302) has an annular structure. The connecting pipe (34) and the backflush pipe (16) are connected by a pipe. A backflush valve (15) is fixedly installed at the rear end of the backflush pipe (16).

2. The vacuum pressure swing adsorption oxygen generator according to claim 1, characterized in that: The tops of the first adsorption tower (5) and the second adsorption tower (7) are fixedly connected by a gas circulation rack (601), and the side of the gas circulation rack (601) is connected to the oxygen storage tower (10) through a pipe.

3. The vacuum pressure swing adsorption oxygen generator according to claim 1, characterized in that: A main control device (8) is fixedly installed on the front middle of the first adsorption tower (5) and the second adsorption tower (7). A detection box (14) is fixedly installed on the rear middle of the compressed gas tank (2). A filter liner (22) is fixedly installed in the middle of the inner cavity of the compressed gas tank (2). A booster pipe (23) is fixedly installed on the lower periphery of the filter liner (22). The upper end of the booster pipe (23) is fixedly connected to the oxygen valve (13). A stabilizing plate (25) is fixedly installed in the middle of the inner cavity of the booster pipe (23). The lower end of the central pipe (26) extends through the stabilizing plate (25) to the lower side of the filter liner (22). The main control device (8) and the detection box (14) constitute the main control module.

4. The vacuum pressure swing adsorption oxygen generator according to claim 1, characterized in that: The upper end of the compressed gas tank (2) is rotatably provided with an upper cover (3), and the lower end of the compressed gas tank (2) is fixedly installed with three adjusting feet (4). An air inlet pipe (11) is fixedly installed on one side of the upper end of the compressed gas tank (2), and a diverter (20) is fixedly installed at one end of the air inlet pipe (11). The lower end of the diverter (20) is connected to the second electric control valve (27) on the lower side through four pipes.

5. A vacuum pressure swing adsorption oxygen generator according to claim 1, characterized in that: The backwash plate (29) has an arc-shaped structure. The side of the backwash plate (29) is clamped to the side of the filter cylinder (18). The side of the backwash plate (29) is provided with a number of flushing holes (32) at equal intervals. The side of the filter cylinder (18) is fixedly installed with a connecting air pipe (2901) corresponding to the flushing hole (32). The connecting air pipe (2901) is an inward one-way valve structure.

6. A vacuum pressure swing adsorption oxygen generator according to claim 1, characterized in that: The diversion plate (31) is fixedly installed with a fourth electrically controlled valve (30) at the connection between the connecting pipe (24) and the backwash plate (29).

7. A vacuum pressure swing adsorption oxygen generator according to claim 1, characterized in that: A cleaning pipe (1801) is fixedly installed on the upper side of the filter cartridge (18), a first electrically controlled valve (1802) is fixedly installed in the middle of the cleaning pipe (1801), an annular exhaust pipe (36) is fixedly installed at the upper end of the cleaning pipe (1801), and an exhaust pipe (12) is fixedly installed on the side of the annular exhaust pipe (36). The annular exhaust pipe (36) has an annular structure. The cleaning pipe (1801), the first electrically controlled valve (1802) and the annular exhaust pipe (36) constitute an exhaust module.

8. A vacuum pressure swing adsorption oxygen generator according to claim 1, characterized in that: The first adsorption tower (5), the gas replacement pipe (6), and the second adsorption tower (7) constitute an oxygen generation module, and a filter detection module is installed inside the filter cylinder (18).

9. A vacuum pressure swing adsorption oxygen generator according to claim 1, characterized in that: A fixing rod (19) is fixedly installed in the middle of the mounting plate (17), and the lower end of the fixing rod (19) is snapped into the connecting pipe (24).

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