Pressure swing adsorption oxygen production equipment convenient to overhaul and maintain

Abstract

The invention discloses pressure swing adsorption oxygen production equipment convenient to overhaul and maintain, which comprises a primary filter, a medium-efficiency filter, an air compressor, a high-efficiency filter, a freezing dryer, an activated carbon filter, an air buffer tank, an oxygen production main machine, an oxygen storage tank and a waste gas storage tank, a first four-way pipe is arranged among the first adsorber, the second adsorber, the third adsorber and the air buffer tank. By means of the design of the first four-way pipe, the second four-way pipe and the third four-way pipe and accurate control over the switching valve assembly, efficient alternate operation between the adsorbers is achieved, the waiting time between the adsorbers in a traditional series connection structure is shortened through the design, the oxygen generation efficiency is improved, one adsorber serves as a standby device, and the oxygen generation efficiency is improved. When a certain adsorber breaks down or needs to be overhauled, the adsorber can be replaced in time, so that the whole oxygen production process is not interrupted, and continuous and stable supply of oxygen is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of oxygen production equipment, and particularly relates to a pressure swing adsorption oxygen production equipment that is convenient for maintenance and repair. Background Art

[0002] A pressure swing adsorption oxygen production equipment (PSA oxygen production equipment) is a device that extracts oxygen from the air using the principle of pressure swing adsorption. The pressure swing adsorption oxygen production equipment uses a special adsorbent (such as molecular sieve) to adsorb nitrogen in the air under a certain pressure, thereby realizing the separation of oxygen and nitrogen. When the pressure decreases, the adsorbent releases the adsorbed nitrogen and realizes regeneration. Through the process of repeated pressurization and decompression, the equipment can continuously produce oxygen.

[0003] A pressure swing adsorption oxygen production equipment disclosed in the authorized announcement number CN112495137B can match corresponding condensation control strategies according to the temperature, humidity, and flow information of the input gas during the purification process to solve the problems of low energy utilization rate and insufficient dehumidification effect of the existing pressure swing adsorption oxygen production equipment.

[0004] Although this pressure swing adsorption oxygen production equipment has shown significant advantages in terms of energy utilization and dehumidification effect, and improved the energy utilization rate and dehumidification effect through an intelligent condensation control strategy, there are still some deficiencies in some aspects that are worthy of further optimization and improvement. For example, in the current design, the output end of the first adsorption tower is directly connected to the input end of the second adsorption tower, and the output end of the second adsorption tower is then connected to the gas storage device. This series connection means that when the first adsorption tower is performing the adsorption operation, the produced oxygen-rich gas cannot be directly transported to the gas storage device through the second adsorption tower, but must wait for the second adsorption tower to complete desorption and enter the adsorption state before continuing to process. Similarly, when the second adsorption tower is performing adsorption, due to the design of the series structure, air needs to first pass through the first adsorption tower that has completed desorption and then enter the second adsorption tower, which additionally increases the flow time of the air and reduces the efficiency of the entire oxygen production process. The series structure design limits the rotation operation efficiency of the adsorption towers, and after any one of the adsorption towers fails, the entire production process needs to be interrupted, which easily affects the continuous production of oxygen and the overall performance of the equipment.

[0005] Therefore, it is necessary to invent a pressure swing adsorption oxygen production equipment that is convenient for maintenance and repair to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a pressure swing adsorption oxygen production equipment that is convenient for maintenance and repair to solve the problems in the above technology.

[0007] To achieve the above object, the present invention provides the following technical solution: A pressure swing adsorption oxygen generation device convenient for maintenance and repair, including a primary filter, a medium filter, an air compressor, a high-efficiency filter, a cold dryer, an activated carbon filter, an air buffer tank, an oxygen generation host, an oxygen storage tank and an exhaust gas storage tank. The oxygen generation host is composed of a first adsorber, a second adsorber and a third adsorber. A first four-way pipe is arranged between the first adsorber, the second adsorber and the third adsorber and the air buffer tank. A second four-way pipe is arranged between the first adsorber, the second adsorber and the third adsorber and the oxygen storage tank. A third four-way pipe is arranged between the first adsorber, the second adsorber and the third adsorber and the exhaust gas storage tank. A switching valve assembly is installed at the intersection of the first four-way pipe, the intersection of the second four-way pipe and the intersection of the third four-way pipe respectively;

[0008] The switching valve assembly is composed of a ball valve housing, a ball valve core body, a driving motor and a controller. The ball valve core body is rotatably connected inside the ball valve housing. The driving motor is installed on the top of the ball valve housing. The output shaft of the driving motor extends into the ball valve housing and is fixedly connected with the ball valve core body. The controller is installed on the surface of the ball valve housing. The driving motor is electrically connected with the controller. The surface of the ball valve housing is sequentially provided with a first through hole, a second through hole, a third through hole and a fourth through hole distributed in a cross shape. A spherical cavity is provided at the center of the ball valve core body. The surface of the ball valve core body is sequentially provided with a first air guide hole, a second air guide hole, a third air guide hole and a fourth air guide hole. The first air guide hole, the second air guide hole, the third air guide hole and the fourth air guide hole are all communicated with the spherical cavity.

[0009] The oxygen generation host is divided into a first adsorber, a second adsorber and a third adsorber arranged in parallel, and flexible connection is realized through a four-way pipe and a switching valve assembly, which is convenient for rotation operation between adsorbers.

[0010] Preferably, the input end of the first four-way pipe is connected with the output end of the air buffer tank, and the three output ends of the first four-way pipe are respectively connected with the input ends of the first adsorber, the second adsorber and the third adsorber.

[0011] The design of the first four-way pipe enables the output end of the air buffer tank to be connected to the input ends of three adsorbers at the same time, which is convenient for gas distribution and supply.

[0012] Preferably, the output end of the second four-way pipe is connected with the input end of the oxygen storage tank, and the three input ends of the second four-way pipe are respectively connected with the oxygen output ends of the first adsorber, the second adsorber and the third adsorber.

[0013] The design of the second four-way pipe enables the oxygen output ends of the three adsorbers to be centrally connected to the oxygen storage tank, which is convenient for unified collection of oxygen.

[0014] Preferably, the output end of the third four-way pipe is connected to the input end of the waste gas storage tank, and the three input ends of the third four-way pipe are respectively connected to the waste gas output ends of the first adsorber, the second adsorber, and the third adsorber.

[0015] The design of the third four-way pipe enables the waste gas output ends of the three adsorbers to be centrally connected to the waste gas storage tank, facilitating the unified collection of waste gas.

[0016] Preferably, the input end of the first four-way pipe, the output end of the second four-way pipe, and the output end of the third four-way pipe are all matched with the fourth through-hole on the corresponding switching valve assembly. The output end of the first four-way pipe close to the first adsorber, the input end of the second four-way pipe close to the first adsorber, and the input end of the third four-way pipe close to the first adsorber are all matched with the first through-hole on the corresponding switching valve assembly. The output end of the first four-way pipe close to the second adsorber, the input end of the second four-way pipe close to the second adsorber, and the input end of the third four-way pipe close to the second adsorber are all matched with the second through-hole on the corresponding switching valve assembly. The output end of the first four-way pipe close to the third adsorber, the input end of the second four-way pipe close to the third adsorber, and the input end of the third four-way pipe close to the third adsorber are all matched with the third through-hole on the corresponding switching valve assembly.

[0017] Through the matching design of different through-holes and air guide holes on the switching valve assembly with the four-way pipe, the precise control of the gas flow direction is achieved, ensuring the normal operation of the equipment.

[0018] Preferably, the included angle between the first air guide hole and the second air guide hole is 120 degrees, the included angle between the second air guide hole and the fourth air guide hole is 60 degrees, the included angle between the fourth air guide hole and the third air guide hole is 30 degrees, the included angle between the third air guide hole and the first air guide hole is 150 degrees, the included angle between the fourth air guide hole and the fourth through-hole is 15 degrees, the included angle between the first air guide hole and the first through-hole is 15 degrees, the included angle between the second air guide hole and the second through-hole is 45 degrees, and the included angle between the third air guide hole and the third through-hole is 45 degrees.

[0019] Start the drive motor through the controller, driving the spherical valve core to rotate clockwise by 15 degrees inside the ball valve housing. At this time, the first through hole, the first air guide hole, the spherical cavity, the fourth air guide hole, and the fourth through hole are in a connected state, enabling docking with the first adsorber; start the drive motor through the controller, driving the spherical valve core to rotate clockwise by 45 degrees inside the ball valve housing. At this time, the second through hole, the second air guide hole, the spherical cavity, the third air guide hole, and the fourth through hole are in a connected state, enabling docking with the second adsorber; start the drive motor through the controller, driving the spherical valve core to rotate counterclockwise by 45 degrees inside the ball valve housing. At this time, the third through hole, the third air guide hole, the spherical cavity, the second air guide hole, and the fourth through hole are in a connected state, enabling docking with the third adsorber.

[0020] Preferably, a first stop valve is installed in the middle of each of the four ports of the first four-way pipe, a second stop valve is installed in the middle of each of the four ports of the second four-way pipe, and a third stop valve is installed in the middle of each of the four ports of the third four-way pipe.

[0021] The design of the stop valve enables a certain adsorber to be completely isolated during maintenance and repair processes, thus avoiding affecting the normal operation of the device.

[0022] Preferably, the output end of the primary filter is connected to the input end of the intermediate filter through a pipeline, and the output end of the intermediate filter is connected to the input end of the air compressor through a pipeline.

[0023] The series use of the primary filter and the intermediate filter improves the air quality entering the air compressor, reducing wear and failure rates inside the compressor.

[0024] Preferably, the output end of the air compressor is connected to the input end of the high-efficiency filter through a pipeline, and the output end of the high-efficiency filter is connected to the input end of the refrigerated dryer through a pipeline.

[0025] The high-efficiency filter further purifies the compressed air, removing fine particles and harmful substances. After the air passes through the high-efficiency filter and enters the refrigerated dryer, the risk of scaling and corrosion inside the refrigerated dryer is reduced, protecting the normal operation of the equipment.

[0026] Preferably, the output end of the refrigerated dryer is connected to the input end of the activated carbon filter through a pipeline, and the output end of the activated carbon filter is connected to the input end of the air buffer tank through a pipeline.

[0027] The activated carbon filter effectively removes residual organic substances and odors in the air, which is beneficial to improving the quality of the oxygen production product; the design of the air buffer tank makes the pressure of the compressed air entering the oxygen production host more stable, which is beneficial to improving the oxygen production efficiency and the stability of equipment operation.

[0028] In the above technical solution, the technical effects and advantages provided by the present invention are as follows:

[0029] 1. Through the design of the first four-way pipe, the second four-way pipe and the third four-way pipe, and the precise control of the switching valve assembly, efficient rotation operation between the adsorbers is achieved. This design avoids the waiting time between the adsorbers in the traditional series structure and improves the oxygen production efficiency;

[0030] 2. By setting one of the adsorbers as a spare, when a certain adsorber fails or needs to be repaired, it can be replaced in time, so that the entire oxygen production process will not be interrupted, ensuring the continuous and stable supply of oxygen. Description of the Drawings

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the partial structure of the present invention;

[0033] Figure 3 It is an exploded view of the structure of the switching valve assembly of the present invention;

[0034] Figure 4 It is a sectional view of the structure of the switching valve assembly when it is not enabled in the present invention;

[0035] Figure 5 It is a sectional view of the structure of the switching valve assembly when docking with the first adsorber in the present invention;

[0036] Figure 6 It is a sectional view of the structure of the switching valve assembly when docking with the second adsorber in the present invention;

[0037] Figure 7 It is a sectional view of the structure of the switching valve assembly when docking with the third adsorber in the present invention.

[0038] Description of the Reference Numerals:

[0039] 1. Primary filter; 2. Intermediate filter; 3. Air compressor; 4. High-efficiency filter; 5. Refrigerated dryer; 6. Activated carbon filter; 7. Air buffer tank; 8. Oxygen storage tank; 9. Exhaust gas storage tank; 10. First adsorber; 11. Second adsorber; 12. Third adsorber; 13. First four-way pipe; 14. Second four-way pipe; 15. Third four-way pipe; 16. Switching valve assembly; 17. Ball valve housing; 18. Ball valve core body; 19. Driving motor; 20. Controller; 21. First through hole; 22. Second through hole; 23. Third through hole; 24. Fourth through hole; 25. Spherical cavity; 26. First air guide hole; 27. Second air guide hole; 28. Third air guide hole; 29. Fourth air guide hole; 30. First stop valve; 31. Second stop valve; 32. Third stop valve. Detailed implementation manners

[0040] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0041] The present invention provides a pressure swing adsorption oxygen generation device convenient for maintenance, as shown in Figure 1-7 Figure 9. The device includes a primary filter 1, a medium filter 2, an air compressor 3, a high-efficiency filter 4, a refrigerated dryer 5, an activated carbon filter 6, an air buffer tank 7, an oxygen generation host, an oxygen storage tank 8 and an exhaust gas storage tank 9. The oxygen generation host is composed of a first adsorber 10, a second adsorber 11 and a third adsorber 12. A first four-way pipe 13 is arranged between the first adsorber 10, the second adsorber 11, the third adsorber 12 and the air buffer tank 7. A second four-way pipe 14 is arranged between the first adsorber 10, the second adsorber 11, the third adsorber 12 and the oxygen storage tank 8. A third four-way pipe 15 is arranged between the first adsorber 10, the second adsorber 11, the third adsorber 12 and the exhaust gas storage tank 9. A switching valve assembly 16 is installed at the intersection of the first four-way pipe 13, the intersection of the second four-way pipe 14 and the intersection of the third four-way pipe 15;

[0042] The switching valve assembly 16 is composed of a ball valve housing 17, a ball valve core body 18, a driving motor 19 and a controller 20. The ball valve core body 18 is rotatably connected to the inside of the ball valve housing 17. The driving motor 19 is installed on the top of the ball valve housing 17. The output shaft of the driving motor 19 extends into the inside of the ball valve housing 17 and is fixedly connected to the ball valve core body 18. The controller 20 is installed on the surface of the ball valve housing 17. The driving motor 19 is electrically connected to the controller 20. The surface of the ball valve housing 17 is successively provided with a first through hole 21, a second through hole 22, a third through hole 23 and a fourth through hole 24 distributed in a cross shape. A spherical cavity 25 is opened at the center of the inside of the ball valve core body 18. The surface of the ball valve core body 18 is successively provided with a first air guide hole 26, a second air guide hole 27, a third air guide hole 28 and a fourth air guide hole 29. The first air guide hole 26, the second air guide hole 27, the third air guide hole 28 and the fourth air guide hole 29 are all communicated with the spherical cavity 25.

[0043] In one aspect of this embodiment, the input end of the first four-way pipe 13 is connected to the output end of the air buffer tank 7. The three output ends of the first four-way pipe 13 are respectively connected to the input ends of the first adsorber 10, the second adsorber 11, and the third adsorber 12. The output end of the second four-way pipe 14 is connected to the input end of the oxygen storage tank 8. The three input ends of the second four-way pipe 14 are respectively connected to the oxygen output ends of the first adsorber 10, the second adsorber 11, and the third adsorber 12. The output end of the third four-way pipe 15 is connected to the input end of the waste gas storage tank 9. The three input ends of the third four-way pipe 15 are respectively connected to the waste gas output ends of the first adsorber 10, the second adsorber 11, and the third adsorber 12. The input end of the first four-way pipe 13, the output end of the second four-way pipe 14, and the output end of the third four-way pipe 15 are all matched with the fourth through-hole 24 on the corresponding switching valve assembly 16. The output end of the first four-way pipe 13 close to the first adsorber 10, the input end of the second four-way pipe 14 close to the first adsorber 10, and the input end of the third four-way pipe 15 close to the first adsorber 10 are all matched with the first through-hole 21 on the corresponding switching valve assembly 16. The output end of the first four-way pipe 13 close to the second adsorber 11, the input end of the second four-way pipe 14 close to the second adsorber 11, and the input end of the third four-way pipe 15 close to the second adsorber 11 are all matched with the second through-hole 22 on the corresponding switching valve assembly 16. The output end of the first four-way pipe 13 close to the third adsorber 12, the input end of the second four-way pipe 14 close to the third adsorber 12, and the input end of the third four-way pipe 15 close to the third adsorber 12 are all matched with the third through-hole 23 on the corresponding switching valve assembly 16. The included angle between the first air guide hole 26 and the second air guide hole 27 is 120 degrees. The included angle between the second air guide hole 27 and the fourth air guide hole 29 is 60 degrees. The included angle between the fourth air guide hole 29 and the third air guide hole 28 is 30 degrees. The included angle between the third air guide hole 28 and the first air guide hole 26 is 150 degrees. The included angle between the fourth air guide hole 29 and the fourth through-hole 24 is 15 degrees. The included angle between the first air guide hole 26 and the first through-hole 21 is 15 degrees. The included angle between the second air guide hole 27 and the second through-hole 22 is 45 degrees. The included angle between the third air guide hole 28 and the third through-hole 23 is 45 degrees. A first stop valve 30 is installed in the middle of each of the four ports of the first four-way pipe 13. A second stop valve 31 is installed in the middle of each of the four ports of the second four-way pipe 14. A third stop valve 32 is installed in the middle of each of the four ports of the third four-way pipe 15. The output end of the primary filter 1 is connected to the input end of the intermediate filter 2 through a pipeline. The output end of the intermediate filter 2 is connected to the input end of the air compressor 3 through a pipeline. The output end of the air compressor 3 is connected to the input end of the high-efficiency filter 4 through a pipeline. The output end of the high-efficiency filter 4 is connected to the input end of the cold dryer 5 through a pipeline.The output end of the refrigerated dryer 5 is connected to the input end of the activated carbon filter 6 through a pipeline, and the output end of the activated carbon filter 6 is connected to the input end of the air buffer tank 7 through a pipeline.

[0044] The primary filter 1, intermediate filter 2, air compressor 3, high-efficiency filter 4, refrigerated dryer 5, activated carbon filter 6, air buffer tank 7, oxygen storage tank 8, waste gas storage tank 9, first adsorber 10, second adsorber 11, third adsorber 12, drive motor 19, controller 20, first stop valve 30, second stop valve 31, and third stop valve 32 mentioned above are all existing technical products, and their specific structures and functions will not be elaborated here.

[0045] Working principle of the present invention:

[0046] Refer to the attached instruction manual Figure 1-7 When using the present invention, first, the outside air first passes through the primary filter 1 and the intermediate filter 2 to remove larger particulate matters and impurities. Subsequently, the air enters the air compressor 3 for compression to increase its pressure. The compressed air then passes through the high-efficiency filter 4 for further purification to remove tiny particulate matters. Next, the air enters the refrigerated dryer 5 for cooling and drying to remove moisture. Finally, the air passes through the activated carbon filter 6 to adsorb residual organic matters and odors, obtaining pure compressed air. The pure compressed air enters the air buffer tank 7, where it is stabilized and buffered to ensure the stability of the subsequent oxygen generation process. The compressed air output from the air buffer tank 7 enters one of the first adsorber 10, second adsorber 11, and third adsorber 12 through the first four-way pipe 13. Each adsorber is filled with a special adsorbent (such as molecular sieve), which adsorbs nitrogen in the air under a pressurized state, thereby separating oxygen.

[0047] Under normal working conditions, two of the three adsorbers are in a rotation operation state, and the remaining one is in a standby state. For example, when the first adsorber 10 and the second adsorber 11 are in rotation operation, the third adsorber 12 is in a standby state. When the first adsorber 10 is performing the adsorption operation, it adsorbs nitrogen in the air and separates oxygen. At this time, the second adsorber 11 performs desorption and regeneration to release the previously adsorbed nitrogen and prepare for the next round of adsorption. The third adsorber 12 remains in a standby state and is ready to replace a faulty or in need of maintenance adsorber at any time. When the second adsorber 11 completes desorption and is ready to perform the adsorption operation, the switching valve assembly 16 will switch according to the instruction of the controller 20, so that the compressed air enters the second adsorber 11 from the air buffer tank 7 through the first four-way pipe 13, and at the same time, the first adsorber 10 starts desorption and regeneration. Through the precise control of the switching valve assembly 16, the rotation operation between the adsorbers can be realized, ensuring the continuity and stability of the oxygen generation process.

[0048] If, within a certain rotation cycle, one of the adsorbers in use (such as the first adsorber 10) malfunctions or requires maintenance, the switching valve assembly 16 will immediately switch to the standby adsorber (such as the third adsorber 12) to take over the work of the faulty adsorber. At the same time, the operator closes the corresponding stop valve, so that the faulty adsorber is completely isolated for maintenance or replacement. Due to the existence of the standby adsorber, the entire oxygen production process will not be interrupted due to the failure of a single adsorber, ensuring the continuous supply of oxygen.

[0049] The oxygen-rich gas (oxygen) output from the adsorber is collected through the second four-way pipe 14 and finally enters the oxygen storage tank 8 for storage. At the same time, the waste gas (mainly nitrogen) generated during the adsorption process is discharged through the third four-way pipe 15 into the waste gas storage tank 9 for subsequent treatment.

Claims

1. A pressure swing adsorption oxygen production equipment which is easy to inspect and maintain, comprising a primary filter (1), a medium filter (2), an air compressor (3), a high efficiency filter (4), a cold dryer (5), an activated carbon filter (6), an air buffer tank (7), an oxygen production host, an oxygen storage tank (8) and a waste gas storage tank (9), characterized in that: The oxygen generator is composed of a first adsorber (10), a second adsorber (11) and a third adsorber (12); a first four-way pipe (13) is arranged between the first adsorber (10), the second adsorber (11) and the third adsorber (12) and the air buffer tank (7); a second four-way pipe (14) is arranged between the first adsorber (10), the second adsorber (11) and the third adsorber (12) and the oxygen storage tank (8); a third four-way pipe (15) is arranged between the first adsorber (10), the second adsorber (11) and the third adsorber (12) and the waste gas storage tank (9); and a switching valve assembly (16) is installed at the intersection of the first four-way pipe (13), the intersection of the second four-way pipe (14) and the intersection of the third four-way pipe (15); The switching valve assembly (16) is composed of a ball valve housing (17), a ball valve core (18), a drive motor (19) and a controller (20); the ball valve core (18) is rotatably connected to the inside of the ball valve housing (17); the drive motor (19) is installed on the top of the ball valve housing (17); the output shaft of the drive motor (19) extends into the inside of the ball valve housing (17) and is fixedly connected to the ball valve core (18); the controller (20) is installed on the surface of the ball valve housing (17); the drive motor (19) is electrically connected to the controller (20); the ball valve housing (17) is connected to the drive motor (19) and the controller (20) is electrically connected to the drive motor (19). A first through hole (21), a second through hole (22), a third through hole (23) and a fourth through hole (24) are sequentially provided on the surface of the ball valve body (17) in a cross shape, a spherical cavity (25) is provided at the center of the ball valve core body (18), a first air guide hole (26), a second air guide hole (27), a third air guide hole (28) and a fourth air guide hole (29) are sequentially provided on the surface of the ball valve core body (18), and the first air guide hole (26), the second air guide hole (27), the third air guide hole (28) and the fourth air guide hole (29) are all connected to the spherical cavity (25).

2. The pressure swing adsorption oxygen production equipment that is easy to repair and maintain according to claim 1 is characterized in that: The input end of the No. 1 four-way pipe (13) is connected to the output end of the air buffer tank (7), and the three output ends of the No. 1 four-way pipe (13) are respectively connected to the input end of the No. 1 adsorber (10), the input end of the No. 2 adsorber (11), and the input end of the No. 3 adsorber (12).

3. The pressure swing adsorption oxygen production equipment that is easy to repair and maintain according to claim 1 is characterized in that: The output end of the No. 2 cross-tube (14) is connected to the input end of the oxygen storage tank (8), and the three input ends of the No. 2 cross-tube (14) are respectively connected to the oxygen output end of the No. 1 adsorber (10), the oxygen output end of the No. 2 adsorber (11), and the oxygen output end of the No. 3 adsorber (12).

4. The pressure swing adsorption oxygen production equipment that is easy to repair and maintain according to claim 3 is characterized in that: The output end of the No. 3 four-way pipe (15) is connected to the input end of the waste gas storage tank (9), and the three input ends of the No. 3 four-way pipe (15) are respectively connected to the waste gas output end of the No. 1 adsorber (10), the waste gas output end of the No. 2 adsorber (11), and the waste gas output end of the No. 3 adsorber (12).

5. The pressure swing adsorption oxygen production equipment that is easy to repair and maintain according to claim 1 is characterized in that: The input end of the No. 1 four-way pipe (13), the output end of the No. 2 four-way pipe (14), and the output end of the No. 3 four-way pipe (15) all match the No. 4 through hole (24) on the corresponding switching valve assembly (16); the output end of the No. 1 four-way pipe (13) close to the No. 1 adsorber (10), the input end of the No. 2 four-way pipe (14) close to the No. 1 adsorber (10), and the input end of the No. 3 four-way pipe (15) close to the No. 1 adsorber (10) all match the No. 1 through hole (21) on the corresponding switching valve assembly (16); the output end of the No. 1 four-way pipe (13) close to the No. 2 adsorber (10) The output end of the attachment (11), the input end of the No. 2 four-way tube (14) close to the No. 2 adsorber (11), and the input end of the No. 3 four-way tube (15) close to the No. 2 adsorber (11) all match the No. 2 through hole (22) on the corresponding switching valve assembly (16); the output end of the No. 1 four-way tube (13) close to the No. 3 adsorber (12), the input end of the No. 2 four-way tube (14) close to the No. 3 adsorber (12), and the input end of the No. 3 four-way tube (15) close to the No. 3 adsorber (12) all match the No. 3 through hole (23) on the corresponding switching valve assembly (16).

6. The pressure swing adsorption oxygen production equipment that is easy to repair and maintain according to claim 1 is characterized in that: The included angle between the No. 1 air guide hole (26) and the No. 2 air guide hole (27) is 120 degrees, the included angle between the No. 2 air guide hole (27) and the No. 4 air guide hole (29) is 60 degrees, the included angle between the No. 4 air guide hole (29) and the No. 3 air guide hole (28) is 30 degrees, the included angle between the No. 3 air guide hole (28) and the No. 1 air guide hole (26) is 150 degrees, the included angle between the No. 4 air guide hole (29) and the No. 4 through hole (24) is 15 degrees, the included angle between the No. 1 air guide hole (26) and the No. 1 through hole (21) is 15 degrees, the included angle between the No. 2 air guide hole (27) and the No. 2 through hole (22) is 45 degrees, and the included angle between the No. 3 air guide hole (28) and the No. 3 through hole (23) is 45 degrees.

7. The pressure swing adsorption oxygen production equipment that is easy to repair and maintain according to claim 1 is characterized in that: A No. 1 stop valve (30) is installed in the middle of each of the four ports of the No. 1 cross-way pipe (13), a No. 2 stop valve (31) is installed in the middle of each of the four ports of the No. 2 cross-way pipe (14), and a No. 3 stop valve (32) is installed in the middle of each of the four ports of the No. 3 cross-way pipe (15).

8. The pressure swing adsorption oxygen production equipment that is easy to repair and maintain according to claim 1 is characterized in that: The output end of the primary filter (1) is connected to the input end of the medium filter (2) via a pipeline, and the output end of the medium filter (2) is connected to the input end of the air compressor (3) via a pipeline.

9. The pressure swing adsorption oxygen production equipment that is easy to repair and maintain according to claim 1 is characterized in that: The output end of the air compressor (3) is connected to the input end of the high-efficiency filter (4) through a pipeline, and the output end of the high-efficiency filter (4) is connected to the input end of the cold dryer (5) through a pipeline.

10. The pressure swing adsorption oxygen production equipment that is easy to repair and maintain according to claim 1 is characterized in that: The output end of the cold dryer (5) is connected to the input end of the activated carbon filter (6) through a pipeline, and the output end of the activated carbon filter (6) is connected to the input end of the air buffer tank (7) through a pipeline.

Images