Energy-saving precise control PSA oxygen generator

Abstract

The application discloses an energy-saving precise control PSA oxygen generator, and particularly relates to the technical field of oxygen generators, which comprises a base, two oxygen production assemblies are arranged on the base, and a treatment tank is arranged on the top of the base. The driving element drives the reinforcing disc and the elastic filter sleeve to displace, extrudes the first molecular sieve to rotate, and cooperates with the dynamic disturbance of the second molecular sieve under the action of the elastic reset lining and the clamping tooth, so that the pressure can be accurately applied to the molecular sieve bed layer, the nitrogen adsorption balance is broken, the electric heating ring is heated in a targeted manner, the nitrogen desorption in the micropore is accelerated, the nitrogen residue is greatly reduced, the bed layer is prevented from loosening and shifting, and the gas uniformly flows through each molecular sieve particle. The stable bed layer structure ensures the uniformity of the adsorption and separation process, and effectively solves the problem of oxygen concentration fluctuation.

Description

Technical Field

[0001] This invention relates to the field of oxygen generator technology, and more specifically, to an energy-saving, precision-controlled PSA oxygen generator. Background Technology

[0002] PSA oxygen generators are devices that produce oxygen based on pressure swing adsorption technology. They are small oxygen generators that are widely used in civilian and medical fields. The core principle is to utilize the selective adsorption characteristics of molecular sieves for nitrogen and oxygen in the air.

[0003] Among them, the patent with announcement number CN223542726U discloses a high-efficiency and energy-saving PSA oxygen generator, including an adsorption tank, an inlet pipe, a nitrogen discharge pipe, an I-shaped balance pipe, a first purging pipe, a second purging pipe, an oxygen outlet pipe, a purity measuring pipe, a qualified gas pipe, an unqualified gas pipe, and an venting pipe. A throttling device is installed on the inlet and outlet pipes of the adsorption tank to control the gas flow rate when the adsorption tank is in balance, so as to avoid high-speed gas impacting the molecular sieve.

[0004] During use, this structure employs multiple balancing methods to ensure that oxygen-enriched air remains at the top of the adsorption tank, while the low-concentration oxygen released is re-adsorbed to obtain oxygen-enriched air, thus improving oxygen recovery rate and reducing air consumption. However, once the molecular sieve reaches nitrogen saturation, the desorption process relies on simple pressure relief, and the lack of precise pressure control leads to incomplete nitrogen desorption and low molecular sieve regeneration efficiency, directly affecting the adsorption effect in the next round. The molecular sieve bed is prone to voids due to gas impact and pressure changes, resulting in uneven gas flow, which not only reduces the consistency of adsorption separation but also causes large fluctuations in oxygen production concentration, making it difficult to achieve precise oxygen control. Dust, oil, and other impurities in the intake air easily adhere to the surface of the molecular sieve, contaminating the bed, further attenuating adsorption performance, and shortening the service life of the molecular sieve. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an energy-saving and precision-controlled PSA oxygen generator, which aims to solve the problems mentioned in the background art.

[0006] The present invention provides the following technical solution: an energy-saving and precision-controlled PSA oxygen generator, including a base, on which two oxygen generating components are disposed;

[0007] The oxygen generation assembly includes a processing tank located on the top of the base. A reinforcing disc is located at the top of the inner cavity of the processing tank. A deformable elastic filter sleeve is located at the bottom of the reinforcing disc. Two connecting rings are located in the middle of the elastic filter sleeve, and a deformable first molecular sieve is rotatably connected between each of the connecting rings. The reinforcing disc drives the elastic filter sleeve to shift and deform, and squeezes the first molecular sieve for nitrogen desorption.

[0008] The first molecular sieve is rotatably connected to the connecting ring. When the connecting ring is displaced and squeezes the first molecular sieve, the first molecular sieve rotates and applies stable pressure to the molecular sieve bed, making the molecular sieve particles fit tightly together and eliminating bed voids.

[0009] The bottom end of the elastic filter sleeve is provided with an inner liner, the top of the inner cavity of the inner liner is provided with a cross plate, the outer side of the cross plate is provided with an electric heating ring, the bottom of the cross plate is provided with a connecting column, and the bottom of the connecting column is rotatably connected with a blade. When the elastic filter sleeve is displaced, it drives the inner liner and the cross plate to move. The blade contacts the medium and is obstructed from rotating to transport the medium.

[0010] Optionally, in one possible implementation, the oxygen generating assembly further includes a filter disc disposed at the bottom end of the inner liner cylinder. The filter disc is threadedly connected to the inner liner cylinder and is used to remove dust and oil from the medium to prevent contamination by impurities. The inner liner cylinder is provided with a plurality of baffles for diverting flow. The baffles abut against the outer side of the electric heating ring. A first support ring is disposed at the bottom of the filter disc, and a second support ring is disposed at the bottom of the first support ring. The first support ring and the second support ring are stacked.

[0011] Optionally, in one possible implementation, a second molecular sieve is disposed between the first and second support rings. Both the second and first molecular sieves are composed of a plurality of zeolite molecular plates, and a processing cavity is formed between two adjacent zeolite molecular plates. An elastic reset liner is disposed in the middle of the second molecular sieve, and a constraint net is fitted around the outside of the second molecular sieve to position each second molecular sieve. The elastic reset liner is used for the second molecular sieve to spring back to its original position after compression deformation. The bottom of the first support ring and the top of the second support ring are respectively rotatably connected to locking teeth, and each of the locking teeth... The teeth respectively abut against the top and bottom of the second molecular sieve, and are rotatably connected to the first and second support rings by each tooth, so that the second molecular sieve rotates when compressed and reset. An air inlet pipe for guiding flow is provided on one side of the bottom of the treatment tank, and an oxygen exhaust tank for exhaust is provided on the other side of the treatment tank. A pressure gauge for pressure monitoring is provided on the oxygen exhaust tank. A driving component is provided on the top of the treatment tank. The output end of the driving component passes through the treatment tank and extends to the top of the reinforcing plate. Several diversion ports for diverting flow are opened on the outer side of the elastic filter sleeve, through which oxygen-enriched gas is discharged.

[0012] The technical effects and advantages of this invention are as follows:

[0013] 1. This invention uses a driving component to displace the reinforcing disc and elastic filter sleeve, compressing the first molecular sieve to rotate. Combined with the dynamic disturbance of the second molecular sieve under the action of the elastic reset liner and retaining teeth, pressure can be precisely applied to the molecular sieve bed, disrupting the nitrogen adsorption equilibrium. Simultaneously, the electric heating ring provides targeted heating, accelerating nitrogen desorption within the micropores and significantly reducing nitrogen residue. This efficient desorption and regeneration provides the optimal molecular sieve bed for the next adsorption process, a core prerequisite for improving subsequent adsorption performance.

[0014] 2. In this invention, the first molecular sieve applies stable pressure to the bed during rotation, eliminating bed voids. The second molecular sieve is radially positioned by a constraint net and axially limited by clamping teeth, preventing the bed from loosening or shifting, and ensuring that the gas flows evenly through each molecular sieve particle. This stable bed structure ensures the uniformity of the adsorption and separation process, effectively solving the problem of oxygen production concentration fluctuations, and is key to optimizing adsorption performance based on efficient regeneration.

[0015] 3. The elastic filter sleeve displacement of this invention drives the inner liner and blades to rotate, accelerating gas delivery. Combined with the flow diversion effect of the baffle, this improves mass transfer efficiency. Precise heating by the electric heating ring works in tandem with gas flow to avoid energy waste. The dual oxygen-generating components alternately perform adsorption and regeneration, eliminating the need for downtime and further improving energy utilization. This effect is based on stable adsorption and efficient regeneration, achieving a synergy between high-efficiency oxygen production and energy-saving operation through optimized gas path and energy distribution. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0017] Figure 1 This is a front view of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram showing the reinforcing disc, inner liner, second molecular sieve, and drive component of the present invention installed inside the processing tank.

[0019] Figure 3 This is a schematic diagram of the first support ring, the second support ring, the second molecular sieve, the elastic reset liner, and the constraint mesh of the present invention.

[0020] Figure 4 This is a schematic diagram of the reinforcing disc, elastic filter sleeve, and diversion port of the present invention.

[0021] Figure 5 This is a schematic diagram of the connecting ring, the first molecular sieve, and the inner liner of the present invention.

[0022] Figure 6 This is a schematic diagram of the connecting ring, the first molecular sieve, the inner liner, and the cross plate of the present invention.

[0023] Figure 7 This is a schematic diagram of the inner liner, filter disc, electric heating ring, connecting column, blades, cross plate and partition plate of the present invention.

[0024] The attached figures are labeled as follows: 1. Base; 2. Treatment tank; 3. Reinforcing disc; 4. Elastic filter sleeve; 5. Connecting ring; 6. First molecular sieve; 7. Diversion port; 8. Inner liner; 9. Cross plate; 10. Filter disc; 11. Electric heating ring; 12. Connecting column; 13. Blade; 14. Partition; 15. First support ring; 16. Second support ring; 17. Second molecular sieve; 18. Treatment chamber; 19. Elastic reset liner; 20. Constraint net; 21. Clamping teeth; 22. Inlet pipe; 23. Oxygen exhaust tank; 24. Pressure gauge; 25. Drive component. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0026] Example 1

[0027] This embodiment discloses an energy-saving and precision-controlled PSA oxygen generator, which aims to solve the technical problems of incomplete nitrogen desorption during molecular sieve regeneration, easy bed loosening, and poor oxygen production concentration stability in existing PSA oxygen generators.

[0028] As attached Figure 1 , 2 As shown, the energy-saving, precision-controlled PSA oxygen generator of this embodiment includes a base 1, which is integrally formed from 304 stainless steel and has an anti-slip rubber pad on the bottom to provide stable support for the entire device. Two identical oxygen generating components are symmetrically arranged on the top of the base 1, and are connected in parallel to the main oxygen exhaust line through pipes to achieve alternating oxygen generation and regeneration, ensuring continuous oxygen production.

[0029] The core carrier of each oxygen generation unit is the processing tank 2, which is made of 6061 aluminum alloy. An air inlet pipe 22 is welded to one side of the bottom of the processing tank 2, with one end extending to the lower part of the inner cavity of the processing tank 2 and the other end connected to an external air compressor via a flange. An oxygen exhaust tank 23 is welded to the upper part of the other side of the processing tank 2. The oxygen exhaust tank 23 is a cylindrical structure, connected to the upper part of the inner cavity of the processing tank 2. A pressure gauge 24 (model Y-100) is installed on the top of the oxygen exhaust tank 23, with a measuring range of 0-1 MPa, used for real-time monitoring of the output pressure of the oxygen-enriched gas. (See attached image) Figure 1 As shown.

[0030] As attached Figure 2 , 4 As shown in Figures 5 and 6, a reinforcing plate 3 is slidably mounted on the top of the inner cavity of the treatment tank 2. The reinforcing plate 3 is a circular steel plate with fluororubber sealing rings fitted around its edges, achieving a sliding seal with the inner wall of the treatment tank 2. A drive component 25 is bolted to the top of the treatment tank 2. A DT300 electric actuator is selected. The output end of the drive component 25 passes through the sealed bearing at the top of the treatment tank 2 and is welded and fixed to the center of the top of the reinforcing plate 3, which can drive the reinforcing plate 3 to move up and down along the axial direction of the treatment tank 2.

[0031] An elastic filter sleeve 4 is bolted to the bottom of the reinforcing disc 3. The elastic filter sleeve 4 is made of fluororubber and has a cylindrical structure, exhibiting good elastic deformation and resilience. Several diversion ports 7 are evenly distributed on the outer side of the elastic filter sleeve 4, circumferentially spaced, for discharging oxygen-enriched gas treated by the first molecular sieve 6. (See attached image.) Figure 4 As shown.

[0032] Two connecting rings 5 ​​are fixed to the inner side of the elastic filter sleeve 4 by snap-fit. The connecting rings 5 ​​are stainless steel annular pieces. A first molecular sieve 6 is rotatably connected between the two connecting rings 5 ​​by a hinge. The first molecular sieve 6 is composed of several zeolite molecular plates. A processing chamber 18 is formed between two adjacent zeolite molecular plates for gas flow and adsorption separation, as shown in the attached figure. Figure 5 , 6 As shown, the hinge connection structure allows the first molecular sieve 6 to rotate relative to the connecting ring 5, and the deformation of the elastic filter sleeve 4 enables the squeezing and resetting action.

[0033] Example 2

[0034] Based on Example 1, this example also discloses the structure of the middle-flow heating component of an energy-saving, precision-controlled PSA oxygen generator, as shown in the attached figure. Figure 2 , 7 As shown, an inner liner 8 is threadedly connected to the bottom inner side of the elastic filter sleeve 4. The inner liner 8 is a stainless steel cylindrical structure that fits tightly against the inner wall of the elastic filter sleeve 4. A cross plate 9 is welded and fixed to the top of the inner cavity of the inner liner 8. The cross plate 9 is composed of two stainless steel plates that are perpendicularly intersected. The four ends of the cross plate 9 are welded and fixed to the inner wall of the inner liner 8, serving as support and airflow guide. The filter disc 10 has a double-layer structure, with a stainless steel filter screen on the upper layer and an activated carbon filter layer on the lower layer, used to remove dust and oil from the incoming air and prevent impurities from contaminating the molecular sieve.

[0035] An electric heating ring 11 is fitted around the outer side of the cross plate 9. The inner diameter of the electric heating ring 11 matches the outer diameter of the cross plate 9 and is fitted snugly. Several partitions 14 are welded inside the inner liner 8. The partitions 14 are made of stainless steel plates and are evenly distributed around the circumference of the inner liner 8. One end of the partition 14 is welded to the inner wall of the inner liner 8, and the other end abuts against the outer wall of the electric heating ring 11. This not only positions and fixes the electric heating ring 11, but also divides the interior of the inner liner 8 into multiple independent flow channels, so that the gas flows evenly through the area of ​​the electric heating ring 11 and ensures heating uniformity.

[0036] A connecting column 12 is vertically welded to the bottom center of the cross plate 9. The connecting column 12 is a stainless steel cylinder. The bottom end of the connecting column 12 is rotatably connected to a blade 13 through a deep groove ball bearing. The blade 13 is made of stainless steel. When the inner liner 8 moves up and down with the elastic filter sleeve 4, the blade 13 is blocked from contacting the flowing gas medium, which accelerates the gas flow and improves the mass transfer efficiency.

[0037] Example 3

[0038] Based on Example 2, this example also discloses the lower primary adsorption component structure of an energy-saving, precision-controlled PSA oxygen generator, as shown in the attached figure. Figure 2 , 3 As shown, the bottom of the filter disc 10 is provided with a first support ring 15 and a second support ring 16. Both support rings are stainless steel ring parts. The bottom of the first support ring 15 and the top of the second support ring 16 are respectively connected to a locking tooth 21 through a rotating shaft. The locking tooth 21 has an arc-shaped structure. A torsion spring is fitted at the rotating shaft so that the locking tooth 21 always abuts against the end face of the second molecular sieve 17, which not only achieves the axial positioning of the second molecular sieve 17, but also does not affect its rotation.

[0039] A second molecular sieve 17 is disposed between the first support ring 15 and the second support ring 16. The structure of the second molecular sieve 17 is the same as that of the first molecular sieve 6, also composed of several zeolite molecular plates. The processing chamber 18 is vertically aligned with the processing chamber of the first molecular sieve 6 to ensure smooth gas flow. An elastic restoring liner 19 is fitted in the middle of the second molecular sieve 17. The elastic restoring liner 19 is made of silicone and has a cylindrical structure with good elastic recovery performance. A constraint net 20 is fitted on the outer side of the second molecular sieve 17, with both ends tied and fixed to the first support ring 15 and the second support ring 16 respectively, for radial positioning of the second molecular sieve 17 to prevent excessive deformation. Figure 3 As shown.

[0040] The specific working principle is as follows: the PSA oxygen generator in this embodiment achieves continuous and stable oxygen production by alternately executing the pressurized adsorption and regeneration desorption processes through two oxygen generation components.

[0041] Pressure adsorption stage:

[0042] The external air compressor is started, and pressurized air is introduced into the treatment tank 2 through the intake pipe 22. At the same time, the drive unit 25 is started, and the drive unit 25 outputs a downward driving force, which drives the reinforcing plate 3 to slide downward along the inner wall of the treatment tank 2, as shown in the attached figure. Figure 2 As shown, during the downward movement of the reinforcing disc 3, the elastic filter sleeve 4 is compressed, causing it to deform axially and radially. This, in turn, drives the two connecting rings 5 ​​in the middle to move downward synchronously, applying axial pressure to the first molecular sieve 6. Since the first molecular sieve 6 and the connecting rings 5 ​​are connected by a hinge, under the pressure, the zeolite molecular plates of the first molecular sieve 6 rotate relative to each other, making the molecular sieve particles tightly adhered, eliminating voids inside the bed, and ensuring that pressurized air can pass evenly through each molecular sieve particle.

[0043] Simultaneously, the deformation of the elastic filter sleeve 4 causes the inner liner 8 to move downwards synchronously. The blades 13 inside the inner liner 8 come into contact with the pressurized air flowing through. Due to gas resistance, the blades 13 rotate around the connecting column 12, accelerating the airflow in the distribution channel. When the air flows through the filter disc 10, it undergoes dust and oil removal treatment through the stainless steel filter screen and activated carbon filter layer, preventing impurities from contaminating the molecular sieve. Subsequently, the purified air flows through the distribution channel separated by the partition 14 into the area of ​​the electric heating ring 11. The electric heating ring 11 is energized and heated to 30-40℃ by the temperature controller to preheat the air and enhance the adsorption activity of the molecular sieve.

[0044] Furthermore, the preheated pressurized air enters the processing chamber 18 of the second molecular sieve 17. At this time, the retaining teeth 21 on the first support ring 15 and the second support ring 16 abut against the end face of the second molecular sieve 17 under the action of the torsion spring. Under the action of the air pressure and the pressure transmitted by the first molecular sieve 6, the zeolite molecular plates of the second molecular sieve 17 rotate relative to each other, and the particles are tightly attached, eliminating gaps. During the process of air flowing through the first molecular sieve 6 and the second molecular sieve 17, nitrogen is selectively adsorbed by the molecular sieves, while oxygen penetrates the molecular sieve bed and gathers inside the elastic filter sleeve 4. Finally, it is discharged through the diversion port 7 on the outside of the elastic filter sleeve 4 and stored in the oxygen exhaust tank 23. The pressure gauge 24 monitors the oxygen exhaust pressure in real time to ensure stable output pressure.

[0045] Regeneration and desorption stage:

[0046] Once the first molecular sieve 6 and the second molecular sieve 17 have reached nitrogen saturation, the regeneration and desorption stage begins. First, the inlet valve of the inlet pipe 22 is closed, and the nitrogen discharge valve at the bottom of the treatment tank 2 is opened to rapidly depressurize the pressure inside the treatment tank 2 to atmospheric pressure. Simultaneously, the drive component 25 is controlled to reverse its movement, causing the reinforcing disc 3 to return to its original position. Figure 2 As shown. After the reinforcing disc 3 moves upward, the elastic filter sleeve 4 loses its pressure constraint and rebounds and resets under its own elastic force, restoring its initial shape. The connecting ring 5 moves upward with the elastic filter sleeve 4, relieving the pressure on the first molecular sieve 6.

[0047] The first molecular sieve 6, under the combined effect of the elasticity of the zeolite molecular plates and the hinge structure, rotates in the opposite direction and undergoes slight expansion or contraction, which is equivalent to dynamically disturbing the molecular sieve particles, causing the nitrogen adsorbed in the micropores of the molecular sieve to detach from the adsorption sites and facilitate its discharge. Simultaneously, the second molecular sieve 17 rebounds and resets under the elastic restoring force of the central elastic reset liner 19. Because the retaining teeth 21 can rotate freely, the second molecular sieve 17 rotates synchronously during the reset process, also producing a dynamic disturbance effect of expansion or contraction, accelerating the desorption of nitrogen in the micropores. At this time, the electric heating ring 11 heats up to 40-50℃, raising the temperature of the molecular sieve bed through heat conduction, further promoting nitrogen desorption. The nitrogen produced by desorption is discharged from the treatment tank 2 through the nitrogen discharge valve, reducing the amount of residual nitrogen in the molecular sieve.

[0048] Cyclic oxygen generation stage:

[0049] After regeneration and desorption are complete, the nitrogen vent valve is closed, and the air inlet valve of the air inlet pipe 22 is reopened. The drive component 25 then moves the reinforcing disc 3 downward again, and the equipment enters the next round of pressurized adsorption stage. Simultaneously, the other oxygen generation component switches to the regeneration and desorption stage, and the two oxygen generation components work alternately in a cycle to achieve a continuous and stable output of oxygen-enriched gas. By adjusting the output force of the drive component 25 and monitoring the pressure of the pressure gauge 24, the degree of compression and adsorption pressure of the molecular sieve bed can be precisely controlled.

[0050] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An energy-saving, precision-controlled PSA oxygen generator, comprising a base (1), characterized in that: Two oxygen generating components are provided on the base (1); The oxygen generation assembly includes a processing tank (2) set on the top of the base (1). A reinforcing disk (3) is set on the top of the inner cavity of the processing tank (2). A deformable elastic filter sleeve (4) is set on the bottom of the reinforcing disk (3). Two connecting rings (5) are set in the middle of the elastic filter sleeve (4). A deformable first molecular sieve (6) is rotatably connected between each of the connecting rings (5). The reinforcing disk (3) drives the elastic filter sleeve (4) to move and deform and squeeze the first molecular sieve (6) for nitrogen pressurized adsorption. The first molecular sieve (6) is rotatably connected to the connecting ring (5) by a hinge. The first molecular sieve (6) is composed of several zeolite molecular plates. A processing cavity (18) is formed between two adjacent zeolite molecular plates for gas flow and adsorption separation. The hinge connection structure allows the first molecular sieve (6) to rotate relative to the connecting ring (5). The deformation of the elastic filter sleeve (4) enables the squeezing and resetting action. When the connecting ring (5) displaces and squeezes the first molecular sieve (6), the first molecular sieve (6) rotates to apply stable pressure to the molecular sieve bed, so that the molecular sieve particles are tightly attached and the gaps in the bed are eliminated. The bottom end of the elastic filter sleeve (4) is provided with an inner liner (8), the top of the inner cavity of the inner liner (8) is provided with a cross plate (9), the outer side of the cross plate (9) is provided with an electric heating ring (11), the bottom of the cross plate (9) is provided with a connecting column (12), and the bottom of the connecting column (12) is rotatably connected with a blade (13). When the elastic filter sleeve (4) is displaced, it drives the inner liner (8) and the cross plate (9) to move. The blade (13) is in contact with the medium and is obstructed from rotating to transport the medium.

2. The energy-saving, precision-controlled PSA oxygen generator according to claim 1, characterized in that: The oxygen generating assembly also includes a filter disc (10) disposed at the bottom of the inner liner (8). The filter disc (10) is threadedly connected to the inner liner (8). The filter disc (10) removes dust and oil from the medium to prevent contamination by impurities.

3. The energy-saving, precision-controlled PSA oxygen generator according to claim 2, characterized in that: The inner liner (8) is provided with a number of baffles (14) for diversion, and the baffles (14) abut against the outside of the electric heating ring (11).

4. The energy-saving, precision-controlled PSA oxygen generator according to claim 2, characterized in that: The filter disc (10) has a first support ring (15) at its bottom and a second support ring (16) at its bottom. The first support ring (15) and the second support ring (16) are stacked together.

5. The energy-saving, precision-controlled PSA oxygen generator according to claim 4, characterized in that: A second molecular sieve (17) is provided between the first support ring (15) and the second support ring (16). The second molecular sieve (17) is composed of a number of zeolite molecular plates, and a processing cavity (18) is formed between two adjacent zeolite molecular plates.

6. The energy-saving, precision-controlled PSA oxygen generator according to claim 5, characterized in that: The second molecular sieve (17) is provided with an elastic reset liner (19) in the middle and a constraint net (20) is provided on the outer side of the second molecular sieve (17). The constraint net (20) positions each second molecular sieve (17). The elastic reset liner (19) is used to spring back and reset the second molecular sieve (17) after it is squeezed and deformed.

7. The energy-saving, precision-controlled PSA oxygen generator according to claim 6, characterized in that: The bottom of the first support ring (15) and the top of the second support ring (16) are respectively rotatably connected with locking teeth (21), and each locking tooth (21) abuts against the top and bottom of the second molecular sieve (17). Each locking tooth (21) is rotatably connected to the first support ring (15) and the second support ring (16) so that the second molecular sieve (17) rotates when compressed and reset.

8. The energy-saving, precision-controlled PSA oxygen generator according to claim 1, characterized in that: The bottom side of the treatment tank (2) is provided with an air inlet pipe (22) for guiding the flow, and the other side of the treatment tank (2) is provided with an oxygen exhaust tank (23) for exhausting the air, and a pressure gauge (24) for pressure monitoring is provided on the oxygen exhaust tank (23).

9. The energy-saving, precision-controlled PSA oxygen generator according to claim 1, characterized in that: The top of the processing tank (2) is provided with a drive unit (25), the output end of which passes through the processing tank (2) and extends to the top of the reinforcing disc (3).

10. An energy-saving, precision-controlled PSA oxygen generator according to claim 1, characterized in that: The elastic filter sleeve (4) has several diversion ports (7) on its outer side for diverting the oxygen-enriched gas.

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