Adsorption tower and pressure swing adsorption oxygen generator

Abstract

The utility model belongs to the technical field of oxygenerators, and discloses an adsorption tower and a pressure swing adsorption oxygenerator, the adsorption tower comprises a tower body and a diversion assembly, the tower body is internally provided with an adsorption cavity, two ends of the tower body are respectively provided with an air inlet and an air outlet which are communicated with the adsorption cavity, and the diversion assembly is arranged on the tower body. The flow guide assembly comprises a flow guide body located in the adsorption cavity and a pipe body which is arranged on the flow guide body and extends out of the adsorption cavity through the air inlet, an air containing cavity is formed in the flow guide body, and a plurality of air uniformizing holes communicated with the air containing cavity are formed in the peripheral side of the flow guide body. And on the other hand, the flow velocity of the clean compressed air passing through the molecular sieve is reduced, so that the adsorption effect of the molecular sieve on nitrogen and carbon dioxide in the clean compressed air is improved, and the oxygen production purity of the pressure swing adsorption oxygen generator is further improved.

Description

Technical Field

[0001] This application belongs to the technical field of oxygen generators, specifically relating to an adsorption tower and a pressure swing adsorption oxygen generator. Background Technology

[0002] A pressure swing adsorption (PSA) oxygen generator is a device that uses the principle of pressure swing adsorption to separate and produce oxygen from the air. It primarily relies on the selective adsorption characteristics of molecular sieves and the PSA principle to produce oxygen. During operation, outside air is first compressed by an air compressor. The compressed air then enters a pretreatment system to remove impurities such as moisture, oil, and dust. The clean compressed air then enters an adsorption tower containing molecular sieves. Under higher pressure, the molecular sieves preferentially adsorb gases such as nitrogen and carbon dioxide, while oxygen is enriched in the gas phase. Unadsorbed oxygen flows out of the adsorption tower's outlet as product oxygen. When the molecular sieves in the adsorption tower reach saturation, the pressure in the tower is reduced, releasing the adsorbed nitrogen and other impurities, thus regenerating the molecular sieves. To achieve continuous and stable oxygen production, a PSA oxygen generator typically has at least two adsorption towers, controlled by a programmable logic controller (PLC) and a switching valve system to alternately perform adsorption and desorption operations.

[0003] The adsorption tower is the core component of a pressure swing adsorption (PSA) oxygen generator. It is mainly divided into three types: vertical, horizontal, and radial. For vertical adsorption towers, compressed air entering through the inlet impacts the molecular sieve, accelerating its pulverization. This affects the oxygen purity and efficiency of the PSA, and also shortens the molecular sieve replacement cycle, increasing the operating cost. Furthermore, the high velocity of the compressed air entering the tower leads to a high velocity across the molecular sieve, affecting its adsorption of nitrogen and nitrogen dioxide, further impacting oxygen purity. Additionally, most of the compressed air flows in the center of the tower, resulting in a higher adsorption load on the molecular sieve there, further reducing its adsorption efficiency for nitrogen and carbon dioxide, and ultimately affecting oxygen purity. Utility Model Content

[0004] This application provides an adsorption tower to improve the oxygen purity of a pressure swing adsorption (PSA) oxygen generator, extend the molecular sieve replacement cycle, and reduce the operating cost of the PSA oxygen generator.

[0005] The technical solution adopted in this application is as follows:

[0006] An adsorption tower, comprising:

[0007] The tower body has an adsorption chamber inside, and an air inlet and an air outlet communicating with the adsorption chamber are respectively provided at both ends of the tower body.

[0008] A flow guiding assembly is disposed in the tower body. The flow guiding assembly includes a flow guiding fluid located in the adsorption chamber and a tube disposed in the flow guiding fluid and extending out of the adsorption chamber through the air inlet. The flow guiding fluid has a gas-containing chamber inside, and a plurality of gas equalization holes communicating with the gas-containing chamber are disposed on the periphery of the flow guiding fluid. The tube is connected to the gas-containing chamber.

[0009] By adopting the above technical solution, when assembling the pressure swing adsorption oxygen generator using the adsorption tower of this application, the outlet of the pretreatment system of the pressure swing adsorption oxygen generator is connected to the tube body of the adsorption tower by using the inlet pipe, so that the clean compressed air after being treated by the pretreatment system can enter the guide assembly through the inlet pipe, and then the clean compressed air enters the adsorption chamber through the guide assembly.

[0010] Because the guide tube has multiple equalization holes communicating with the gas chamber, the clean compressed air entering the gas chamber through the tube will enter the adsorption chamber through the periphery of the guide tube. This equalization holes reduce the kinetic potential energy of the clean compressed air, thereby reducing the impact of the clean compressed air on the molecular sieve, slowing down its pulverization, and improving the oxygen purity and efficiency of the pressure swing adsorption (PSA) oxygen generator. It also extends the replacement cycle of the molecular sieve, thus reducing the operating cost of the PSA oxygen generator. Furthermore, it reduces the flow velocity of the clean compressed air entering the adsorption chamber, thereby reducing the flow velocity of the clean compressed air passing through the molecular sieve. This improves the adsorption effect of molecular sieves on nitrogen and carbon dioxide in clean compressed air, thereby further improving the oxygen purity of the pressure swing adsorption (PSA) oxygen generator. Furthermore, it enables the uniform distribution of clean compressed air using a guide fluid, ensuring even distribution within the adsorption chamber and reducing the adsorption load on the molecular sieve located at the center of the chamber. This guarantees the adsorption efficiency of the molecular sieve for nitrogen and carbon dioxide, further improving the oxygen purity of the PSA oxygen generator. Additionally, it minimizes the wear and tear on the molecular sieves within the adsorption chamber, extending the replacement cycle and ultimately reducing the operating cost of the PSA oxygen generator.

[0011] Furthermore, compared to the scheme where the equalizing orifice is located at the end of the guide fluid away from the tube body, this method utilizes the end wall of the guide fluid away from the tube body to block the clean compressed air. This causes the clean compressed air to be deflected and move towards the tube body due to the obstruction of the end wall. The clean compressed air subsequently entering the gas chamber through the tube body then collides with the deflected clean compressed air, further reducing its kinetic energy. This further reduces the kinetic energy of the clean compressed air as it exits the gas chamber through the equalizing orifice, thus further reducing the impact of the clean compressed air on the molecular sieve, further slowing down the pulverization of the molecular sieve, further extending the replacement cycle of the molecular sieve, and further reducing the operating cost of the pressure swing adsorption oxygen generator. Simultaneously, it further reduces the flow velocity of the clean compressed air through the molecular sieve, further improving the adsorption effect of the molecular sieve on nitrogen and carbon dioxide in the clean compressed air, and thus further improving the oxygen purity of the pressure swing adsorption oxygen generator.

[0012] Furthermore, since the gas equalization pores are located on the periphery of the guide fluid, it increases the difficulty for the pulverized molecular sieve to enter the inlet pipe through the guide component during backflushing of the adsorption tower. This greatly reduces the risk of the pulverized molecular sieve clogging the inlet pipe, thereby ensuring the working stability of the pressure swing adsorption oxygen generator and reducing its failure rate.

[0013] Furthermore, backflushing the adsorption tower can reduce the kinetic potential energy of the gas discharged from the adsorption tower through the inlet pipe, thereby reducing the impact of the gas discharged through the pipe on the silencer of the pressure swing adsorption oxygen generator, reducing the load on the silencer, and thus reducing the noise generated by the pressure swing adsorption oxygen generator when backflushing the adsorption tower.

[0014] Optionally, the air distribution holes are arranged in multiple rows at intervals along the axial direction of the guide fluid, and each row of air distribution holes is arranged in multiple rows at intervals along the circumferential direction of the guide fluid.

[0015] By adopting the above technical solution, since the air distribution holes are arranged in multiple rows along the axial direction of the guide fluid, and each row of air distribution holes is arranged in multiple rows along the circumferential direction of the guide fluid, the difficulty of forming air distribution holes is reduced on the one hand, and the number of air distribution holes is increased on the other hand. This further improves the uniform distribution effect of clean compressed air and further reduces the dynamic potential energy when clean compressed air enters the adsorption chamber. In turn, it further improves the oxygen purity of the pressure swing adsorption oxygen generator and further slows down the pulverization of molecular sieves, thereby further extending the replacement cycle of molecular sieves and further reducing the operating cost of the pressure swing adsorption oxygen generator.

[0016] Optionally, a first screen is provided on the outside of the fluid guide, the first screen having a first screen hole, the diameter of the first screen hole being smaller than the diameter of the air equalization hole.

[0017] By adopting the above technical solution, since a first screen is set on the outside of the guide fluid, and the aperture of the first screen hole is smaller than that of the air equalization hole, the first screen can be used to further evenly distribute the clean compressed air that is about to enter the adsorption chamber, thereby further improving the uniformity of the clean compressed air and further reducing the dynamic potential energy of the clean compressed air when entering the adsorption chamber. This further improves the oxygen purity of the pressure swing adsorption oxygen generator and further extends the replacement cycle of the molecular sieve. On the other hand, it further increases the difficulty for the pulverized molecular sieve to enter the air inlet pipe through the guide component when backflushing the adsorption tower, thereby further reducing the risk of the pulverized molecular sieve clogging the air inlet pipe. This further ensures the working stability of the pressure swing adsorption oxygen generator and further reduces the failure rate of the pressure swing adsorption oxygen generator.

[0018] Optionally, the pipe body is provided with a first flange and a second flange spaced apart from the first flange. The first flange is fixedly connected to the tower body, and the second flange is used to connect the air inlet pipe. The diameter of the second flange is smaller than the diameter of the first flange.

[0019] By adopting the above technical solution, the connection difficulty between the pipe body and the tower body is reduced due to the first flange fixedly connected to the tower body, thereby improving the assembly efficiency of the adsorption tower. It also increases the connection stability between the flow guiding components and the tower body, ensuring the operational stability of the adsorption tower. Furthermore, the connection stability between the pipe body and the inlet pipe is increased and the connection difficulty is reduced due to the second flange, ensuring the operational stability of the pressure swing adsorption (PSA) oxygen generator and improving its assembly efficiency. Moreover, since the diameter of the second flange is smaller than that of the first flange, the diameter of the flange installed on the inlet pipe is also smaller than that of the first flange, reducing the manufacturing cost of the PSA oxygen generator. Additionally, the bolt pairs connected to the first flange and the bolt pairs connected to the second flange can avoid each other, reducing the assembly difficulty of the PSA oxygen generator and further improving its assembly efficiency.

[0020] Optionally, the adsorption tower further includes a flow-dividing component located in the adsorption chamber, the flow-dividing component being located between the air inlet and the air outlet, the flow-dividing component including a flow-dividing plate, the flow-dividing plate having a central region, a middle region surrounding the central region, and a side region surrounding the middle region, the central region being provided with a first through hole, the side region being provided with a second through hole with a diameter larger than the diameter of the first through hole, and the middle region being provided with a third through hole with a diameter larger than the diameter of the second through hole.

[0021] By adopting the above technical solution, since the flow distribution component is located between the inlet and outlet, the clean compressed air entering the adsorption chamber through the air distribution hole can be further evenly distributed by the first, second, and third through holes on the flow distribution plate. This further improves the uniformity of the clean compressed air, thereby increasing the oxygen purity of the pressure swing adsorption (PSA) oxygen generator. Furthermore, it reduces the dynamic potential energy of the clean compressed air, thus lowering its flow velocity through the molecular sieve and reducing its impact on the molecular sieve. This further improves the oxygen purity of the PSA oxygen generator. The replacement cycle of the molecular sieve is extended, further reducing the operating cost of the pressure swing adsorption (PSA) oxygen generator. Furthermore, because the diameter of the third through-hole is larger than that of the second through-hole, and the diameter of the second through-hole is larger than that of the first through-hole, and the first through-hole is located in the central region of the distribution plate, the third through-hole is located in the middle region surrounding the central region, and the second through-hole is located in the side region surrounding the middle region, the uniform distribution of clean compressed air is further improved, reducing the dead space of the molecular sieve. This allows for full utilization of the molecular sieve to adsorb nitrogen and carbon dioxide in the clean compressed air, thereby further improving the oxygen purity of the PSA oxygen generator.

[0022] Optionally, the diversion assembly further includes a nonwoven fabric, the outer peripheral surface of which contacts the cavity wall of the adsorption chamber.

[0023] By adopting the above technical solution, since the distribution component also includes non-woven fabric, it increases the uniform distribution effect of the distribution component on clean compressed air, further fully utilizing the molecular sieve to adsorb nitrogen and carbon dioxide in the clean compressed air, thereby further improving the oxygen purity of the pressure swing adsorption oxygen generator. On the other hand, it also improves the filtration effect of the distribution component, further reducing the risk of the pulverized molecular sieve clogging the air inlet pipe during backflushing of the adsorption tower, thus further ensuring the working stability of the pressure swing adsorption oxygen generator and further reducing its failure rate. Furthermore, since the outer peripheral surface of the non-woven fabric is in contact with the cavity wall of the adsorption chamber, it can, to a certain extent, seal the gap between the distribution component and the cavity wall of the adsorption chamber, increasing the sealing performance between the distribution component and the cavity wall of the adsorption chamber, thereby reducing the phenomenon of clean compressed air passing through the gap between the periphery of the distribution component and the cavity wall of the adsorption chamber, and further improving the adsorption effect of the molecular sieve on nitrogen and carbon dioxide in the clean compressed air.

[0024] Optionally, at least two diverter plates are provided, and the diverter assembly further includes a second screen located between the diverter plates. The second screen has a second screen hole, the diameter of which is smaller than the diameter of the first through hole.

[0025] By adopting the above technical solution, since the diversion component also includes a second screen with a smaller aperture than the first through-hole, the second screen can be used to evenly distribute the clean compressed air, thereby improving the uniformity of the clean compressed air distribution. This further enhances the adsorption of nitrogen and carbon dioxide in the clean compressed air by the molecular sieve, thereby improving the oxygen purity of the pressure swing adsorption oxygen generator. Simultaneously, it can further reduce the kinetic potential energy of the clean compressed air, reducing its impact on the molecular sieve and thus slowing down its pulverization. Furthermore, it also improves the adsorption... When the tower is backflushed, the second screen can be used to block the pulverized molecular sieve, further increasing the difficulty of the pulverized molecular sieve entering the air inlet pipe and causing blockage. This further ensures the working stability of the pressure swing adsorption oxygen generator and reduces its failure rate. Since there are at least two flow dividers, and the second screen is located between the two flow dividers, the flow dividers can support and limit the second screen, increasing its stability. This ensures the filtration effect of the second screen on the pulverized molecular sieve and the uniform distribution of clean compressed air.

[0026] Optionally, at least two second screens are provided, and the diversion assembly further includes a nylon filter cloth located between the second screens, wherein the mesh count of the second screens is smaller than that of the nylon filter cloth.

[0027] By adopting the above technical solution, since the diversion component also includes nylon filter cloth, and the mesh size of the second screen is smaller than that of the nylon filter cloth, the nylon filter cloth can further distribute the clean compressed air evenly, thereby improving the uniformity of the clean compressed air distribution. This allows for better utilization of the molecular sieve to adsorb nitrogen and carbon dioxide in the clean compressed air, further improving the oxygen purity of the pressure swing adsorption oxygen generator. Simultaneously, it can further reduce the kinetic potential energy of the clean compressed air, reducing its impact on the molecular sieve and thus slowing down its pulverization. Furthermore, during backflushing of the adsorption tower, the nylon filter cloth can also block the pulverized molecular sieve. This design further increases the difficulty of preventing the pulverized molecular sieve from entering the intake pipe and causing blockage, thereby ensuring the operational stability of the pressure swing adsorption (PSA) oxygen generator and reducing its failure rate. Since at least two second screens are provided, with the nylon filter cloth positioned between them, the second screens can support and limit the nylon filter cloth, increasing its stability and ensuring its filtration effect on the pulverized molecular sieve and its uniform distribution of clean compressed air. Furthermore, compared to replacing the nylon filter cloth with a screen, this design also reduces the manufacturing difficulty and cost of the adsorption tower.

[0028] Optionally, the adsorption tower further includes a diversion component and a support component located at the bottom of the diversion component. The support component includes an elastic ring and a flexible tube sleeved outside the elastic ring. The elastic ring contacts the cavity wall of the adsorption chamber and the diversion component through the flexible tube.

[0029] By adopting the above technical solution, since the support component is located at the bottom of the diversion component, it can support the diversion component, thereby increasing its stability and preventing it from overturning or tilting due to unbalanced impact forces. This also avoids the situation where the molecular sieve is subjected to compressive force during the overturning or tilting process, which could lead to pulverization of the molecular sieve. Furthermore, since the support component includes an elastic ring and a flexible tube sleeved outside the elastic ring, and the elastic ring contacts the cavity wall of the adsorption chamber and the diversion component through the flexible tube, the elastic force of the elastic ring can be utilized... The elastic ring is pressed tightly against the wall of the adsorption chamber, reducing the difficulty of installing the support components. On the other hand, the elastic ring can also apply a squeezing force towards the outside of the adsorption chamber to the flexible tube, thereby sealing the gap between the flow distribution component and the adsorption chamber wall. This increases the sealing between the periphery of the flow distribution component and the adsorption chamber wall, preventing clean compressed air from passing through the gap between the flow distribution component and the adsorption chamber wall. This ensures the adsorption effect of the molecular sieve on nitrogen and carbon dioxide in the clean compressed air, and further ensures the oxygen purity of the pressure swing adsorption oxygen generator.

[0030] This application also provides a pressure swing adsorption (PSA) oxygen generator to improve the oxygen purity of the PSA oxygen generator, extend the molecular sieve replacement cycle, and reduce the operating cost of the PSA oxygen generator.

[0031] A pressure swing adsorption oxygen generator includes an adsorption tower as described above.

[0032] By adopting the above technical solution, since the pressure swing adsorption (PSA) oxygen generator in this application uses the aforementioned adsorption tower, it reduces the kinetic potential energy of clean compressed air entering the adsorption chamber, thereby reducing the impact of clean compressed air on the molecular sieve, slowing down the pulverization of the molecular sieve, extending the replacement cycle of the molecular sieve, and thus reducing the operating cost of the PSA oxygen generator. On the other hand, it reduces the flow rate of clean compressed air passing through the molecular sieve, so that the molecular sieve can fully adsorb nitrogen and carbon dioxide in the clean compressed air, thereby improving the oxygen purity of the PSA oxygen generator. Furthermore, it can also reduce the kinetic potential energy of the gas in the adsorption chamber when it is discharged through the inlet pipe during backflushing of the adsorption tower, thereby reducing the load on the silencer of the PSA oxygen generator and thus reducing the noise generated by the PSA oxygen generator during operation.

[0033] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0034] 1. The adsorption tower in this application includes a tower body and a flow guiding assembly. The tower body has an adsorption chamber inside, and an inlet and an outlet communicating with the adsorption chamber are respectively provided at both ends of the tower body. The flow guiding assembly is located in the tower body and includes a guide fluid located in the adsorption chamber and a tube located in the guide fluid and extending out of the adsorption chamber through the inlet. The guide fluid has a gas-containing chamber inside, and multiple gas equalization holes communicating with the gas-containing chamber are provided around the guide fluid. The tube is connected to the gas-containing chamber, so that clean compressed air entering the gas-containing chamber through the tube will enter the adsorption chamber around the guide fluid. The gas equalization holes reduce the kinetic potential energy of the clean compressed air, thereby reducing the impact of the clean compressed air on the molecular sieve, slowing down the pulverization of the molecular sieve, and thus improving the oxygen purity and working efficiency of the pressure swing adsorption oxygen generator. Simultaneously, it extends the replacement cycle of the molecular sieve, achieving... This approach reduces the operating cost of pressure swing adsorption (PSA) oxygen generators. On the one hand, it lowers the flow rate of clean compressed air entering the adsorption chamber, thus reducing the flow rate of clean compressed air passing through the molecular sieve. This improves the adsorption effect of the molecular sieve on nitrogen and carbon dioxide in the clean compressed air, further enhancing the oxygen purity produced by the PSA oxygen generator. Furthermore, it utilizes a guide fluid to evenly distribute the clean compressed air within the adsorption chamber, reducing the adsorption load on the molecular sieve located at the center of the adsorption chamber. This ensures the adsorption efficiency of the molecular sieve for nitrogen and carbon dioxide, further improving the oxygen purity produced by the PSA oxygen generator. On the other hand, it minimizes the wear and tear on the molecular sieves within the adsorption chamber, extending the replacement cycle and further reducing the operating cost of the PSA oxygen generator.

[0035] 2. In this application, the air distribution holes are arranged in multiple rows along the axial direction of the guide fluid, and each row of air distribution holes is arranged in multiple rows along the circumferential direction of the guide fluid. This reduces the difficulty of forming air distribution holes and increases the number of air distribution holes, thereby further improving the uniform distribution effect of clean compressed air and further reducing the dynamic potential energy when clean compressed air enters the adsorption chamber. This further improves the oxygen purity of the pressure swing adsorption oxygen generator and further slows down the pulverization of molecular sieves, thereby further extending the replacement cycle of molecular sieves and further reducing the operating cost of the pressure swing adsorption oxygen generator.

[0036] 3. The guide fluid in this application is externally provided with a first screen, which has a first screen hole. The aperture of the first screen hole is smaller than that of the equalization hole. This allows the first screen to further evenly distribute the clean compressed air that is about to enter the adsorption chamber, thereby improving the uniformity of the clean compressed air and reducing the kinetic potential energy of the clean compressed air when it enters the adsorption chamber. This further improves the oxygen purity of the pressure swing adsorption oxygen generator and extends the replacement cycle of the molecular sieve. On the other hand, it further increases the difficulty for the pulverized molecular sieve to enter the inlet pipe through the guide component during backflushing of the adsorption tower, thereby reducing the risk of the pulverized molecular sieve clogging the inlet pipe. This further ensures the working stability of the pressure swing adsorption oxygen generator and reduces its failure rate. Attached Figure Description

[0037] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0038] Figure 1 This is a cross-sectional view of the adsorption tower described in one embodiment of this application;

[0039] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0040] Figure 3 for Figure 1 Enlarged view of part B in the middle;

[0041] Figure 4 for Figure 1 Enlarged view of section C;

[0042] Figure 5 This is a schematic diagram of the flow guiding component in one embodiment of this application;

[0043] Figure 6 This is a cross-sectional view of the flow guiding component described in one embodiment of this application;

[0044] Figure 7 This is a schematic diagram of the structure of the shunt component described in one embodiment of this application;

[0045] Figure 8 This is a schematic diagram of the shunt component from another perspective in one embodiment of this application;

[0046] Figure 9 for Figure 8 Enlarged view of part D in the middle.

[0047] Figure label:

[0048] 1. Tower body; 11. Lower shell; 111. Air inlet; 112. Extension pipe; 113. Connecting flange; 12. Top cover; 121. Air outlet; 122. Spring; 2. Flow guiding assembly; 21. Flow guiding fluid; 211. Air distribution hole; 212. First screen; 213. Silicone tube; 214. Snap ring; 22. Tube body; 221. First flange; 222. Second flange; 3. Molecular sieve; 4. Flow splitting assembly; 41. Flow splitting plate; 411. First through hole; 412. Second through hole; 413. Third through hole; 42. Non-woven fabric; 43. Second screen; 44. Nylon filter cloth; 45. Fixing bolt pair; 5. Ceramic ball; 6. Alumina; 61. Partition; 7. Support assembly; 71. Elastic ring; 72. Flexible tube; 8. Distribution assembly; 81. Air baffle plate; 82. Connecting part. Detailed Implementation

[0049] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0050] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0051] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0052] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0053] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "a particular embodiment," "example," or "specific example," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0054] Reference Figures 1 to 9 An adsorption tower is disclosed, comprising a tower body 1 and a flow guiding component 2. The tower body 1 has an adsorption chamber inside, and an air inlet 111 and an air outlet 121 communicating with the adsorption chamber are respectively provided at both ends of the tower body 1. The flow guiding component 2 is provided on the tower body 1 and includes a flow guiding fluid 21 located in the adsorption chamber and a tube 22 provided on the flow guiding fluid 21 and extending out of the adsorption chamber through the air inlet 111. The flow guiding fluid 21 has a gas-containing chamber inside, and a plurality of gas equalization holes 211 communicating with the gas-containing chamber are provided on the periphery of the flow guiding fluid 21. The tube 22 is connected to the gas-containing chamber.

[0055] It is understood that one end of the tower body 1 is provided with an air inlet 111 that communicates with the adsorption chamber, and the other end of the tower body 1 is provided with an air outlet 121 that communicates with the adsorption chamber. The flow guiding component 2 is sealed and connected to the tower body 1, and a molecular sieve 3 is provided in the adsorption chamber between the air inlet 111 and the air outlet 121.

[0056] When assembling the pressure swing adsorption oxygen generator using the adsorption tower of this application, the outlet of the pretreatment system of the pressure swing adsorption oxygen generator is connected to the tube body 22 of the adsorption tower by using an air inlet pipe, so that the clean compressed air after being treated by the pretreatment system can enter the flow guide component 2 through the air inlet pipe, and then the clean compressed air enters the adsorption chamber through the flow guide component 2.

[0057] Because the guide fluid 21 has multiple equalization holes 211 connected to the gas chamber, the clean compressed air entering the gas chamber through the pipe 22 will enter the adsorption chamber through the periphery of the guide fluid 21. This utilizes the equalization holes 211 to reduce the kinetic potential energy of the clean compressed air, thereby reducing the impact of the clean compressed air on the molecular sieve 3, slowing down the pulverization of the molecular sieve 3, and thus improving the oxygen purity and working efficiency of the pressure swing adsorption oxygen generator with the adsorption tower of this application. It also extends the replacement cycle of the molecular sieve 3, thereby reducing the operating cost of the pressure swing adsorption oxygen generator. Furthermore, it reduces the flow rate of the clean compressed air entering the adsorption chamber, thus reducing the impact of the clean compressed air passing through the molecular sieve 3. The flow rate is increased, thereby improving the adsorption effect of molecular sieve 3 on nitrogen and carbon dioxide in clean compressed air, further improving the oxygen purity of the pressure swing adsorption oxygen generator. It can also achieve uniform distribution of clean compressed air by using guide fluid 21, so that the clean compressed air is evenly distributed in the adsorption chamber, thereby reducing the adsorption load of molecular sieve 3 located in the center of the adsorption chamber, ensuring the adsorption efficiency of molecular sieve 3 on nitrogen and carbon dioxide in clean compressed air, and further improving the oxygen purity of the pressure swing adsorption oxygen generator. On the other hand, it can make the wear of molecular sieve 3 in the adsorption chamber as uniform as possible, thereby extending the replacement cycle of molecular sieve 3 and further reducing the operating cost of pressure swing adsorption oxygen generator.

[0058] Furthermore, compared to the scheme where the equalizing hole 211 is located at the end of the guide fluid 21 away from the tube body 22, the end wall of the guide fluid 21 away from the tube body 22 can also be used to block the clean compressed air. This causes the clean compressed air to be deflected by the end wall of the guide fluid 21 away from the tube body 22 and move towards the direction of the tube body 22. The clean compressed air that subsequently enters the gas chamber through the tube body 22 will collide with the deflected clean compressed air, thereby further reducing the dynamic potential energy of the clean compressed air. This further reduces the dynamic potential energy of the clean compressed air when it exits the gas chamber through the equalizing hole 211, thereby further reducing the impact of the clean compressed air on the molecular sieve 3, further slowing down the pulverization of the molecular sieve 3, further extending the replacement cycle of the molecular sieve 3, and further reducing the operating cost of the pressure swing adsorption oxygen generator. At the same time, it further reduces the flow velocity of the clean compressed air when it flows through the molecular sieve 3, thereby further improving the adsorption effect of the molecular sieve 3 on nitrogen and carbon dioxide in the clean compressed air, and further improving the oxygen production purity of the pressure swing adsorption oxygen generator.

[0059] Furthermore, since the equalizing pore 211 is located on the periphery of the guide fluid 21, it increases the difficulty for the pulverized molecular sieve 3 to enter the inlet pipe through the guide component 2 when the adsorption tower is backflushed, thereby greatly reducing the risk of the pulverized molecular sieve 3 clogging the inlet pipe, thus ensuring the working stability of the pressure swing adsorption oxygen generator and reducing the failure rate of the pressure swing adsorption oxygen generator.

[0060] Furthermore, backflushing the adsorption tower can reduce the kinetic potential energy of the gas discharged from the adsorption tower through the inlet pipe, thereby reducing the impact of the gas discharged through the pipe 22 on the silencer of the pressure swing adsorption oxygen generator, reducing the load on the silencer, and thus reducing the noise generated by the pressure swing adsorption oxygen generator when backflushing the adsorption tower.

[0061] This application does not specify the formation method of the uniform pores 211, which can be any of the following embodiments:

[0062] Implementation Method 1, in this implementation method, refer to Figure 6 The air distribution holes 211 are arranged in multiple rows along the axial direction of the guide fluid 21, and each row of air distribution holes 211 is arranged in multiple rows along the circumferential direction of the guide fluid 21.

[0063] It is understandable that the air distribution hole 211 is a hole structure opened on the periphery of the fluid guide 21, or the air distribution hole 211 is a hole structure reserved on the periphery of the fluid guide 21.

[0064] Since the air distribution holes 211 are arranged in multiple rows along the axial direction of the guide fluid 21, and each row of air distribution holes 211 is arranged in multiple rows along the circumferential direction of the guide fluid 21, the difficulty of forming the air distribution holes 211 is reduced on the one hand, and the number of air distribution holes 211 is increased on the other hand. This further improves the uniform distribution effect of clean compressed air and further reduces the dynamic potential energy when clean compressed air enters the adsorption chamber. In turn, it further improves the oxygen purity of the pressure swing adsorption oxygen generator and further slows down the pulverization of the molecular sieve 3, thereby further extending the replacement cycle of the molecular sieve 3 and further reducing the operating cost of the pressure swing adsorption oxygen generator.

[0065] Preferably, multiple rows of air distribution holes 211 are evenly spaced along the axial direction of the guide fluid 21, and multiple air distribution holes 211 in each row are evenly spaced along the circumferential direction of the guide fluid 21, so as to further improve the uniform distribution effect of the guide assembly 2 on clean compressed air.

[0066] In the second embodiment, the guide fluid 21 has an annular screen, and the sieve holes on the annular screen constitute the air distribution holes 211 of the guide fluid 21, thereby increasing the number of air distribution holes 211 to improve the uniform distribution effect of the guide fluid assembly 2 on the clean compressed air. At the same time, it reduces the dynamic potential energy when the clean compressed air enters the adsorption chamber, thereby further improving the oxygen purity of the pressure swing adsorption oxygen generator and further slowing down the pulverization of the molecular sieve 3, thereby further extending the replacement cycle of the molecular sieve 3, and further reducing the operating cost of the pressure swing adsorption oxygen generator.

[0067] This application does not specifically limit the structure of the guide fluid 21. Regarding the first embodiment described above, the guide fluid 21 includes an annular structure and two end plates fixedly connected to both ends of the annular structure. The two end plates and the annular structure together form a gas-containing cavity. Gas distribution holes 211 are provided on the periphery of the annular structure. The tube body 22 is fixedly connected to one of the end plates, and this end plate has a perforated structure for communicating with the gas-containing cavity, thereby reducing the manufacturing difficulty of the guide fluid assembly 2. Regarding the second embodiment described above, the guide fluid 21 includes two parallel, spaced-apart end plates and an annular screen located between the two end plates. The two ends of the annular screen are fixedly connected to the two end plates, and the two end plates and the annular screen together form a gas-containing cavity. The tube body 22 is fixedly connected to one of the end plates, and this end plate has a perforated structure communicating with the tube body 22.

[0068] In a preferred embodiment, refer to Figure 2 and Figure 5 The outside of the guide fluid 21 is provided with a first screen 212, which has a first screen hole, and the diameter of the first screen hole is smaller than the diameter of the air equalization hole 211.

[0069] It is understandable that the first screen 212 is wrapped around the outer periphery of the fluid guide 21.

[0070] Because the guide fluid 21 is provided with a first screen 212, the aperture of the first screen hole is smaller than the aperture of the equalizing hole 211. On the one hand, the first screen 212 can be used to distribute the clean compressed air that is about to enter the adsorption chamber again, so as to further improve the uniformity of the clean compressed air and further reduce the dynamic potential energy when the clean compressed air enters the adsorption chamber. This further improves the oxygen purity of the pressure swing adsorption oxygen generator and further extends the replacement cycle of the molecular sieve 3. On the other hand, it further increases the difficulty for the pulverized molecular sieve 3 to enter the air inlet pipe through the guide component 2 when the adsorption tower is backflushed, so as to further reduce the risk of the pulverized molecular sieve 3 clogging the air inlet pipe. This further ensures the working stability of the pressure swing adsorption oxygen generator and further reduces the failure rate of the pressure swing adsorption oxygen generator.

[0071] This application does not specifically limit the method by which the first screen 212 is fixedly connected to the fluid guide 21. Preferably, the first screen 212 is bound to the outer peripheral surface of the fluid guide 21 with wire to reduce the difficulty of fixing the first screen 212 and thus improve the fixing efficiency of the first screen 212. In other embodiments, the first screen 212 can also be fixedly connected to the fluid guide 21 by means of adhesive, screws, etc.

[0072] This application does not specify the connection method between the flow guiding component 2 and the tower body 1, or the connection method between the flow guiding component 2 and the air inlet pipe. Preferably, refer to Figure 2 , Figure 5 and Figure 6 The pipe body 22 is provided with a first flange 221 and a second flange 222 spaced apart from the first flange 221. The first flange 221 is fixedly connected to the tower body 1, and the second flange 222 is used to connect the air inlet pipe. The diameter of the second flange 222 is smaller than the diameter of the first flange 221.

[0073] It is understood that the first flange 221 and the second flange 222 are both coaxially fixedly connected to the pipe body 22. The first flange 221 and the second flange 222 are both located outside the adsorption chamber, and the second flange 222 is located on the side of the first flange 221 away from the tower body 1. The first flange 221 is fixedly connected to the tower body 1 by bolt pairs, and the second flange 222 is fixedly connected to the air inlet pipe by bolt pairs.

[0074] Because the pipe body 22 is provided with a first flange 221 that is fixedly connected to the tower body 1, the connection difficulty between the pipe body 22 and the tower body 1 is reduced, thereby improving the assembly efficiency of the adsorption tower. At the same time, the connection stability between the flow guiding component 2 and the tower body 1 is increased, thereby ensuring the working stability of the adsorption tower. Furthermore, because the pipe body 22 is provided with a second flange 222 for connecting the air inlet pipe, the connection stability between the pipe body 22 and the air inlet pipe is increased, and the connection difficulty between the pipe body 22 and the air inlet pipe is reduced, thereby ensuring the working stability of the pressure swing adsorption oxygen generator and improving the assembly efficiency of the pressure swing adsorption oxygen generator.

[0075] Furthermore, since the diameter of the second flange 222 is smaller than the diameter of the first flange 221, the diameter of the flange installed on the air inlet pipe can be smaller than the diameter of the first flange 221, thereby reducing the production cost of the pressure swing adsorption oxygen generator. At the same time, it also allows the bolt pair connected to the first flange 221 to avoid the bolt pair connected to the second flange 222, thereby reducing the assembly difficulty of the pressure swing adsorption oxygen generator and further improving the assembly efficiency of the pressure swing adsorption oxygen generator.

[0076] In other embodiments, the flow guide assembly 2 can be connected to the tower body 1 by welding the flow guide 21 to the air inlet 111, and the pipe body 22 can be connected to the air inlet pipe by using a pipe joint.

[0077] The better one is to refer to Figure 1 and Figure 2The diameter of the guide fluid 21 is larger than the diameter of the pipe body 22, and the diameter of the air inlet 111 is larger than the diameter of the guide fluid 21. An extension pipe 112 is provided on the outside of the tower body 1 at the air inlet 111. The inner diameter of the extension pipe 112 is larger than the diameter of the guide fluid 21. A connecting flange 113 is coaxially fixedly connected to the end of the extension pipe 112 away from the tower body 1. The guide fluid 21 extends into the adsorption chamber through the extension pipe 112 and the air inlet 111. A sealing gasket is provided between the first flange 221 and the connecting flange 113, and the two are fixedly connected by bolts to achieve a sealed connection of the guide fluid assembly 2 to the tower body 1.

[0078] To increase the sealing between the guide fluid 21 and the air inlet 111, and to prevent the pulverized molecular sieve 3 from entering the extension tube 112, any of the following embodiments can also be used:

[0079] In Example 1, a sealant is applied between the outer peripheral surface of the guide fluid 21 and the inlet wall of the air inlet 111 to seal the gap between the guide fluid 21 and the air inlet 111, so as to prevent the pulverized molecular sieve 3 from entering the extension tube 112.

[0080] In Example 2, a sealing ring and a retaining ring are fitted around the outside of the guide fluid 21. Both the sealing ring and the retaining ring are located in the adsorption chamber. The retaining ring is located on the side of the sealing ring away from the extension tube 112. The outer diameter of the sealing ring is larger than the diameter of the air inlet 111. The inner circumferential surface of the retaining ring abuts against the outer circumferential surface of the guide fluid 21. The retaining ring can apply a squeezing force to the sealing ring in the direction of the extension tube 112 so that the sealing ring abuts against the cavity wall of the adsorption chamber. The sealing ring is used to seal the gap between the guide fluid 21 and the air inlet 111, thereby preventing the pulverized molecular sieve 3 from entering the extension tube 112.

[0081] Implementation Example 3, in this implementation example, refer to Figure 1 and Figure 2 The outer side of the guide fluid 21 is fitted with an annular silicone tube 213. A snap ring 214 is inserted inside the silicone tube 213. The snap ring 214 is elastic and has a notch in its circumferential direction. The elastic deformation of the snap ring 214 applies a squeezing force towards the inside of the guide fluid 21 to make the inner circumferential surface of the silicone tube 213 press against the outer circumferential surface of the guide fluid 21. Furthermore, by applying pressure to the silicone tube 213 towards the side where the extension tube 112 is located, the silicone tube 213 drives the snap ring 214 to move towards the direction of the extension tube 112. Finally, the silicone tube 213 presses against the wall of the adsorption chamber, thereby sealing the gap between the guide fluid 21 and the air inlet 111 and preventing the pulverized molecular sieve 3 from entering the extension tube 112.

[0082] In a preferred embodiment, refer to Figure 1 , Figure 2 and Figure 7 The adsorption tower also includes a flow divider 4 located in the adsorption chamber. The flow divider 4 is located between the air inlet 111 and the air outlet 121. The flow divider 4 includes a flow divider plate 41, which has a central region, a middle region surrounding the central region, and a side region surrounding the middle region. The central region is provided with a first through hole 411, the side region is provided with a second through hole 412 with a diameter larger than that of the first through hole 411, and the middle region is provided with a third through hole 413 with a diameter larger than that of the second through hole 412.

[0083] It is understandable that the first through hole 411 is evenly spaced in the central area, the second through hole 412 is evenly spaced in the side area, and the third through hole 413 is evenly spaced in the middle area.

[0084] Since the flow distribution component 4 is located between the air inlet 111 and the air outlet 121, the clean compressed air entering the adsorption chamber through the air distribution hole 211 can be further evenly distributed by the first through hole 411, the second through hole 412 and the third through hole 413 on the flow distribution plate 41. On the one hand, this further improves the uniformity of the clean compressed air, thereby further improving the oxygen purity of the pressure swing adsorption oxygen generator. On the other hand, it further reduces the dynamic potential energy of the clean compressed air, thereby reducing the flow velocity of the clean compressed air when it flows through the molecular sieve 3 and reducing the impact of the clean compressed air on the molecular sieve 3. This further improves the oxygen purity of the pressure swing adsorption oxygen generator and further extends the replacement cycle of the molecular sieve 3, thereby further reducing the operating cost of the pressure swing adsorption oxygen generator.

[0085] Furthermore, since the diameter of the third through hole 413 is larger than that of the second through hole 412, and the diameter of the second through hole 412 is larger than that of the first through hole 411, and the first through hole 411 is located in the central region of the flow divider plate 41, the third through hole 413 is located in the middle region surrounding the central region, and the second through hole 412 is located in the side region surrounding the middle region, the uniform distribution effect of clean compressed air is further improved, the dead space of the molecular sieve 3 is reduced, so as to make full use of the molecular sieve 3 to adsorb nitrogen and carbon dioxide in the clean compressed air, thereby further improving the oxygen purity of the pressure swing adsorption oxygen generator.

[0086] Furthermore, the clean compressed air discharged through the equalization hole 211 flows towards the direction of the distribution plate 41, so that some of the clean compressed air passes through the first through hole 411, the second through hole 412, and the third through hole 413 on the distribution plate 41. The remaining clean compressed air is blocked by the distribution plate 41, and then the remaining clean compressed air is deflected by the obstruction of the distribution plate 41 and moves towards the guide fluid 21. The clean compressed air moving towards the guide fluid 21 will collide with the clean compressed air discharged through the equalization hole 211, thereby further reducing the dynamic potential energy of the clean compressed air and further improving the uniformity of the clean compressed air. This further reduces the impact of the clean compressed air on the molecular sieve 3 and further improves the adsorption effect of the molecular sieve 3 on nitrogen and carbon dioxide in the clean compressed air, thereby slowing down the pulverization of the molecular sieve 3 and further improving the oxygen purity of the pressure swing adsorption oxygen generator.

[0087] Preferably, the diameter of the central region is larger than the diameter of the guide fluid 21, so that the central region can block the clean compressed air discharged through the air equalization hole 211, thereby further improving the uniform distribution effect of clean compressed air in the adsorption chamber, and further improving the oxygen purity of the pressure swing adsorption oxygen generator.

[0088] This application does not specify the number of diversion components 4. Preferably, two sets of diversion components 4 are arranged at intervals. One set of diversion components 4 is located between the molecular sieve 3 and the air inlet 111 to support the molecular sieve 3. The other set of diversion components 4 is located between the molecular sieve 3 and the air outlet 121 to apply pressure to the molecular sieve 3 to ensure the stability of the molecular sieve 3.

[0089] The better one is to refer to Figure 1 The flow distribution component 4, located near the air inlet 111, is filled with ceramic balls 5 between itself and the air inlet 111. On the one hand, the ceramic balls 5 can be used to evenly distribute the clean compressed air discharged through the air distribution hole 211, so as to make full use of the molecular sieve 3 to absorb nitrogen and carbon dioxide in the clean compressed air, thereby improving the oxygen purity of the pressure swing adsorption oxygen generator. On the other hand, the impact of the clean compressed air on the ceramic balls 5 can be used to reduce the dynamic potential energy of the clean compressed air, thereby reducing the impact of the clean compressed air on the molecular sieve 3, simplifying the pulverization of the molecular sieve 3, extending the replacement cycle of the molecular sieve 3, and further reducing the operating cost of the pressure swing adsorption oxygen generator.

[0090] Furthermore, refer to Figure 1An alumina 6 is disposed between the molecular sieve 3 and the ceramic balls 5. A flow divider 4, located on the side of the molecular sieve 3 near the air inlet 111, is positioned between the alumina 6 and the ceramic balls 5. This flow divider 4 isolates the alumina 6 and the ceramic balls 5 and supports the alumina 6. Furthermore, the alumina 6 adsorbs moisture from the clean compressed air, achieving a drying effect and preventing the pores of the molecular sieve 3 from becoming clogged by water molecules. This extends the service life of the molecular sieve 3, further reducing its replacement cycle and consequently lowering the operating cost of the pressure swing adsorption (PSA) oxygen generator. A partition 61 is disposed between the molecular sieve 3 and the alumina 6 to isolate them. The partition 61 has multiple perforated structures to ensure that clean compressed air can pass through it. Alternatively, in other embodiments, the flow divider 4 can replace the partition 61 between the molecular sieve 3 and the alumina 6.

[0091] In other embodiments, the shunt component 4 may also be provided in other quantities.

[0092] Preferably, the diameter of the diversion plate 41 is smaller than the inner diameter of the tower body 1, so as to facilitate the installation of the diversion plate 41 into the adsorption chamber, thereby facilitating the installation of the diversion assembly 4.

[0093] Furthermore, refer to Figure 8 and Figure 9 The diversion component 4 also includes non-woven fabric 42, which on the one hand increases the uniform distribution effect of the diversion component 4 on the clean compressed air, so as to further make full use of the molecular sieve 3 to adsorb nitrogen and carbon dioxide in the clean compressed air, thereby further improving the oxygen purity of the pressure swing adsorption oxygen generator. On the other hand, it can also improve the filtration effect of the diversion component 4, so as to further reduce the risk of the pulverized molecular sieve 3 clogging the air inlet pipe during backflushing of the adsorption tower, thereby further ensuring the working stability of the pressure swing adsorption oxygen generator and further reducing the failure rate of the pressure swing adsorption oxygen generator. The outer peripheral surface of the non-woven fabric 42 contacts the cavity wall of the adsorption chamber, and to a certain extent, the non-woven fabric 42 can seal the gap between the diversion component 4 and the cavity wall of the adsorption chamber, thereby increasing the sealing between the diversion component 4 and the cavity wall of the adsorption chamber, thereby reducing the phenomenon of clean compressed air passing through the gap between the periphery of the diversion component 4 and the cavity wall of the adsorption chamber, and further improving the adsorption effect of the molecular sieve 3 on nitrogen and carbon dioxide in the clean compressed air.

[0094] This application does not specify a particular number of diverter plates 41; preferably, refer to... Figure 8 and Figure 9The diversion plate 41 is provided with at least two pieces, and the diversion assembly 4 also includes a second screen 43 located between the diversion plates 41. The second screen 43 has a second screen hole, and the diameter of the second screen hole is smaller than the diameter of the first through hole 411.

[0095] Understandably, the second screen 43 is located between two adjacent diversion plates 41.

[0096] Since the diversion component 4 also includes a second screen 43, the aperture of the second screen is smaller than that of the first through hole 411. On the one hand, the second screen 43 can be used to evenly distribute the clean compressed air, thereby further improving the uniformity of the clean compressed air. This allows the molecular sieve 3 to fully utilize the adsorption of nitrogen and carbon dioxide in the clean compressed air, thereby further improving the oxygen purity of the pressure swing adsorption oxygen generator. At the same time, it can also further reduce the dynamic potential energy of the clean compressed air, thereby reducing the impact of the clean compressed air on the molecular sieve 3 and further slowing down the pulverization of the molecular sieve 3. On the other hand, when backflushing the adsorption tower, the second screen 43 can be used to block the pulverized molecular sieve 3, thereby further increasing the difficulty of the pulverized molecular sieve 3 entering the air inlet pipe and causing blockage of the air inlet pipe. This further ensures the working stability of the pressure swing adsorption oxygen generator and further reduces the failure rate of the pressure swing adsorption oxygen generator.

[0097] Since there are at least two flow dividers 41, the second screen 43 is located between the two flow dividers 41. The flow dividers 41 can then support and limit the second screen 43, thereby increasing the stability of the second screen 43 and ensuring the filtration effect of the second screen 43 on the pulverized molecular sieve 3 and the uniform distribution effect of the second screen 43 on the clean compressed air.

[0098] Preferably, two splitter plates 41 are spaced apart to reduce the manufacturing cost of the splitter assembly 4.

[0099] This application does not specify the number of the second screen 43; preferably, refer to... Figure 8 and Figure 9 At least two second screens 43 are provided, and the diversion assembly 4 also includes a nylon filter cloth 44 located between the second screens 43, wherein the mesh number of the second screens 43 is smaller than the mesh number of the nylon filter cloth 44.

[0100] Understandably, the nylon filter cloth 44 is located between the two second screens 43.

[0101] Since the diversion component 4 also includes a nylon filter cloth 44, and the mesh size of the second screen 43 is smaller than that of the nylon filter cloth 44, the nylon filter cloth 44 can further distribute the clean compressed air evenly, thereby improving the uniformity of the clean compressed air. This allows the molecular sieve 3 to fully adsorb nitrogen and carbon dioxide in the clean compressed air, further improving the oxygen purity of the pressure swing adsorption oxygen generator. At the same time, it can also further reduce the dynamic potential energy of the clean compressed air, thereby reducing the impact of the clean compressed air on the molecular sieve 3 and further slowing down the pulverization of the molecular sieve 3. On the other hand, when backflushing the adsorption tower, the nylon filter cloth 44 can also block the pulverized molecular sieve 3, further increasing the difficulty of the pulverized molecular sieve 3 entering the intake pipe and causing blockage. This further ensures the working stability of the pressure swing adsorption oxygen generator and further reduces the failure rate of the pressure swing adsorption oxygen generator.

[0102] Since at least two second screens 43 are provided, and the nylon filter cloth 44 is located between the two second screens 43, the second screens 43 can be used to support and limit the nylon filter cloth 44, thereby increasing the stability of the nylon filter cloth 44, and thus ensuring the filtration effect of the nylon filter cloth 44 on the pulverized molecular sieve 3 and the uniform distribution effect of the nylon filter cloth 44 on the clean compressed air; in addition, compared with the scheme of replacing the nylon filter cloth 44 with screens, it can also reduce the manufacturing difficulty and cost of the adsorption tower.

[0103] Preferably, the second screen 43 is provided with two intervals to reduce the manufacturing cost of the diversion component 4.

[0104] In other implementation examples, the second screen 43 may be provided as a single screen or in other quantities.

[0105] In other embodiments, the diverter 41 may be provided in only one or other quantities.

[0106] This application does not specifically limit the positional relationship between the nonwoven fabric 42 and the diverter plate 41. For the diverter assembly 4 located between the outlet 121 and the molecular sieve 3, the nonwoven fabric 42 is located on the side of the diverter plate 41 away from the outlet 121, so as to improve the blocking effect of the nonwoven fabric 42 on the pulverized molecular sieve 3, thereby preventing the pulverized molecular sieve 3 from entering the outlet pipe through the outlet 121 with the product oxygen and causing the outlet pipe to be blocked. For the diverter assembly 4 located between the ceramic ball 5 and the alumina 6, the nonwoven fabric 42 is located on the side of the diverter plate 41 facing the molecular sieve 3, so as to improve the filtering and blocking effect of the nonwoven fabric 42 on the pulverized molecular sieve 3, so as to prevent the pulverized molecular sieve 3 from entering the inlet pipe with the gas through the guide assembly 2 when the adsorption tower is backflushed, thereby preventing the inlet pipe from being blocked.

[0107] The better one is to refer to Figure 7 , Figure 8 and Figure 9 The diversion assembly 4 also includes a fixing bolt pair 45, which includes a bolt and a nut threaded onto the bolt. The diversion plate 41, non-woven fabric 42, second screen 43, and nylon filter cloth 44 are all provided with holes for the bolt to pass through. The bolt passes through the diversion plate 41, non-woven fabric 42, second screen 43, and nylon filter cloth 44, and the bolt heads of the nut and bolt are located on opposite sides of the diversion plate 41. Two washers are fitted on the outside of the bolt. The bolt head applies pressure to the non-woven fabric 42 through one of the washers, and the nut applies pressure to the diversion plate 41 through the other washer. The pressure of the bolt head and nut is used to fix the diversion plate 41, non-woven fabric 42, second screen 43, and nylon filter cloth 44 together, thereby increasing the stability of the diversion assembly 4 and facilitating its installation.

[0108] In a preferred embodiment, refer to Figure 1 and Figure 3 The adsorption tower also includes a diversion component 4 and a support component 7 located at the bottom of the diversion component 4. The support component 7 includes an elastic ring 71 and a flexible tube 72 sleeved outside the elastic ring 71. The elastic ring 71 contacts the cavity wall of the adsorption chamber and the diversion component 4 through the flexible tube 72.

[0109] It is understandable that the flexible tube 72 is annular. After the support component 7 is installed in the adsorption cavity, the elastic ring 71 is in a deformed state in its own radial direction, and the elastic ring 71 can exert a squeezing force on the flexible tube 72 towards the outside of the adsorption cavity under the action of its own elastic force.

[0110] Since the support component 7 is located at the bottom of the diversion component 4, it can support the diversion component 4 to increase the stability of the diversion component 4. This avoids the diversion component 4 from flipping or tilting due to unbalanced impact forces. Therefore, it avoids the diversion component 4 from being subjected to extrusion pressure on the molecular sieve 3 during the flipping or tilting process, which would cause the molecular sieve 3 to pulverize.

[0111] Furthermore, since the support component 7 includes an elastic ring 71 and a flexible tube 72 sleeved outside the elastic ring 71, and the elastic ring 71 contacts the cavity wall of the adsorption chamber and the diversion component 4 through the flexible tube 72, on the one hand, the elastic force of the elastic ring 71 can be used to make the elastic ring 71 press against the cavity wall of the adsorption chamber, thereby reducing the difficulty of installing the support component 7. On the other hand, the elastic ring 71 can also be used to apply a squeezing force towards the outside of the adsorption chamber to the flexible tube 72, so that the flexible tube 72 can seal the gap between the diversion component 4 and the cavity wall of the adsorption chamber, thereby increasing the sealing between the periphery of the diversion component 4 and the cavity wall of the adsorption chamber, so as to prevent clean compressed air from passing through the gap between the diversion component 4 and the cavity wall of the adsorption chamber, thus ensuring the adsorption effect of the molecular sieve 3 on nitrogen and carbon dioxide in the clean compressed air, and further ensuring the oxygen purity of the pressure swing adsorption oxygen generator.

[0112] Furthermore, after the clean compressed air flowing along the wall of the adsorption chamber reaches the location of the flexible tube 72, the flexible tube 72 can also block the clean compressed air, causing the clean compressed air to change its flow direction and move towards the center of the adsorption chamber radially along the tower body 1 under the impact of the clean compressed air that is about to flow to the location of the flexible tube 72. This increases the flow path of the clean compressed air in the adsorption chamber, thereby further reducing the dynamic potential energy of the clean compressed air and further reducing the impact of the clean compressed air on the molecular sieve 3, thus further slowing down the pulverization of the molecular sieve 3. On the other hand, the clean compressed air flowing radially along the tower body 1 can also impact the clean compressed air flowing axially along the tower body 1, thereby further improving the uniformity of the clean compressed air and further improving the oxygen purity of the pressure swing adsorption oxygen generator.

[0113] This application does not specifically limit the structure of the elastic ring 71. Preferably, the elastic ring 71 has a deformation notch that penetrates the elastic ring 71 radially. On the one hand, compared to the elastic ring 71 being a closed ring structure in its circumferential direction, the elastic ring 71 can be manufactured using a material with greater rigidity to ensure that the elastic ring 71 can apply extrusion force to the flexible tube 72, thereby ensuring the sealing between the flexible tube 72 and the adsorption cavity wall. On the other hand, the diameter of the elastic ring 71 can be changed by utilizing the change in the width of the deformation notch, so as to facilitate the installation of the support component 7 into the adsorption cavity.

[0114] This application does not impose specific limitations on the material used to manufacture the elastic ring 71. Preferably, the elastic ring 71 is made of spring steel to ensure its elastic deformation capability. In other embodiments, the elastic ring 71 can also be made of other metallic materials, such as stainless steel or high-carbon steel.

[0115] In other embodiments, the elastic ring 71 may also be a ring structure that is closed in its own circumference, that is, the design of the deformation notch is eliminated.

[0116] This application does not specifically limit the material used to manufacture the flexible tube 72. Preferably, the flexible tube 72 is made of silicone material to increase the sealing effect of the flexible tube 72 on the gap between the flow guiding component 2 and the adsorption cavity wall. It also increases the friction between the flexible tube 72 and the adsorption cavity wall, further enhancing the support effect of the support component 7 on the flow diversion component 4. In other embodiments, the flexible tube 72 can also be made of other flexible materials such as rubber that can provide a sealing effect.

[0117] This application does not specify the number of support components 7. Preferably, there are three sets of support components 7, two sets of support components 7 are respectively set to two flow groups 4, and the remaining set of support components 7 is set to the partition 61 and located at the bottom of the partition 61, so as to support the partition 61 and increase the stability of the partition 61.

[0118] In a preferred embodiment, refer to Figure 1 The air inlet 111 is located at the bottom of the tower body 1 and at the top of the tower body 1, so that clean compressed air enters the adsorption chamber from the bottom end of the tower body 1, while product oxygen flows out of the adsorption chamber from the top of the tower body 1.

[0119] In a preferred embodiment, refer to Figure 1 and Figure 4 The adsorption chamber is equipped with a uniform distribution component 8 located at the outlet 121. The uniform distribution component 8 includes a gas baffle plate 81 and a connecting part 82 for connecting the gas baffle plate 81 and the tower body 1. The gas baffle plate 81 is arranged opposite to the outlet 121, so that when the adsorption tower is backflushed by air entering through the outlet 121, the gas baffle plate 81 can block the gas entering the adsorption chamber through the outlet 121, so that the gas enters the adsorption chamber from the periphery of the gas baffle plate 81, thereby reducing the kinetic potential energy of the gas, thereby reducing the impact of the gas on the molecular sieve 3, slowing down the pulverization of the molecular sieve 3, and further extending the service life of the molecular sieve 3, thereby further extending the replacement cycle of the molecular sieve 3, and thus further reducing the operating cost of the pressure swing adsorption oxygen generator.

[0120] Furthermore, refer to Figure 4 Multiple connecting parts 82 are provided, and multiple connecting parts 82 are provided at intervals along the circumference of the air barrier plate 81 to increase the number of connection points between the air barrier plate 81 and the tower body 1, thereby increasing the stability of the air barrier plate 81.

[0121] This application does not specifically limit the structure of the connecting part 82. Preferably, the connecting part 82 is a sheet-like structure, with one end of the sheet-like structure fixedly connected to the gas barrier plate 81 and the other end of the sheet-like structure fixedly connected to the cavity wall of the adsorption chamber to increase the stability of the gas barrier plate 81. In other embodiments, the connecting part 82 can also be a rod-like structure or other structures that can connect the gas barrier plate 81 and the cavity wall of the adsorption chamber.

[0122] In a preferred embodiment, refer to Figure 1 The tower body 1 includes a lower shell 11 and an upper cover 12. Both the lower shell 11 and the upper cover 12 are provided with flanges. The two flanges are fixedly connected by bolts. The air inlet 111 is located at the bottom of the lower shell 11, and the air outlet 121 is located at the top of the upper cover 12. The flow guiding assembly 2, the molecular sieve 3, and the flow distribution assembly 4 are all located inside the lower shell 11. The uniform distribution assembly 8 is located inside the upper cover 12. The upper cover 12 is provided with a spring 122. One end of the bottom of the spring 122 abuts against the flow distribution assembly 4 located on the side of the molecular sieve 3 away from the ceramic ball 5, so as to apply downward pressure to the flow distribution assembly 4 located on the side of the molecular sieve 3 away from the ceramic ball 5 by using the spring 122, so as to increase the stability of the flow distribution assembly 4 located on the side of the molecular sieve 3 away from the ceramic ball 5.

[0123] It should be noted that the term "uniformly distributed" in this application refers to a uniform distribution.

[0124] This application also discloses a pressure swing adsorption oxygen generator, which includes the adsorption tower as described above.

[0125] It is understandable that the pressure swing adsorption oxygen generator also includes an air compressor, a pretreatment system, and a switching valve system for controlling the connection or disconnection between the adsorption tower and the pretreatment system. The pretreatment system is connected to the air compressor, and the pipe 22 is connected to the pretreatment system through the air inlet pipe. At least two adsorption towers are provided.

[0126] Because the pressure swing adsorption (PSA) oxygen generator in this application uses the aforementioned adsorption tower, it reduces the kinetic potential energy of clean compressed air entering the adsorption chamber, thereby reducing the impact of clean compressed air on the molecular sieve 3, slowing down the pulverization of the molecular sieve 3, extending the replacement cycle of the molecular sieve 3, and thus reducing the operating cost of the PSA oxygen generator. On the other hand, it reduces the flow rate of clean compressed air passing through the molecular sieve 3, so that the molecular sieve 3 can fully adsorb nitrogen and carbon dioxide in the clean compressed air, thereby improving the oxygen purity of the PSA oxygen generator. Furthermore, it can also reduce the kinetic potential energy of the gas in the adsorption chamber when it is discharged through the pipe 22 during backflushing of the adsorption tower, thereby reducing the load on the silencer of the PSA oxygen generator and thus reducing the noise generated by the PSA oxygen generator during operation.

[0127] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0128] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0129] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An adsorption tower, characterized in that, include: The tower body (1) has an adsorption chamber inside, and the two ends of the tower body (1) are respectively provided with an air inlet (111) and an air outlet (121) communicating with the adsorption chamber. A flow guiding component (2) is provided on the tower body (1). The flow guiding component (2) includes a flow guiding fluid (21) located in the adsorption chamber and a tube (22) provided on the flow guiding fluid (21) and extending out of the adsorption chamber through the air inlet (111). The flow guiding fluid (21) has a gas-containing cavity inside. A plurality of gas equalization holes (211) communicating with the gas-containing cavity are provided on the periphery of the flow guiding fluid (21). The tube (22) is connected to the gas-containing cavity.

2. An adsorption tower according to claim 1, characterized in that, The air equalization holes (211) are arranged in multiple rows along the axial direction of the guide fluid (21), and each row of air equalization holes (211) is arranged in multiple rows along the circumferential direction of the guide fluid (21).

3. An adsorption tower according to claim 1, characterized in that, The outside of the guide fluid (21) is provided with a first screen (212), the first screen (212) has a first screen hole, the diameter of the first screen hole is smaller than the diameter of the air equalization hole (211).

4. An adsorption tower according to claim 1, characterized in that, The pipe body (22) is provided with a first flange (221) and a second flange (222) spaced apart from the first flange (221). The first flange (221) is fixedly connected to the tower body (1), and the second flange (222) is used to connect the air inlet pipe. The diameter of the second flange (222) is smaller than the diameter of the first flange (221).

5. An adsorption tower according to any one of claims 1-4, characterized in that, The adsorption tower further includes a flow divider assembly (4) located in the adsorption chamber. The flow divider assembly (4) is located between the air inlet (111) and the air outlet (121). The flow divider assembly (4) includes a flow divider plate (41). The flow divider plate (41) has a central region, a middle region surrounding the central region, and a side region surrounding the middle region. The central region is provided with a first through hole (411). The side region is provided with a second through hole (412) with a diameter larger than that of the first through hole (411). The middle region is provided with a third through hole (413) with a diameter larger than that of the second through hole (412).

6. An adsorption tower according to claim 5, characterized in that, The diversion component (4) also includes a nonwoven fabric (42), the outer peripheral surface of which contacts the cavity wall of the adsorption cavity.

7. An adsorption tower according to claim 5, characterized in that, The diversion plate (41) is provided with at least two pieces, and the diversion assembly (4) further includes a second screen (43) located between the diversion plates (41). The second screen (43) has a second screen hole, and the diameter of the second screen hole is smaller than the diameter of the first through hole (411).

8. An adsorption tower according to claim 7, characterized in that, At least two second screens (43) are provided, and the diversion component (4) further includes a nylon filter cloth (44) located between the second screens (43), wherein the mesh count of the second screens (43) is smaller than the mesh count of the nylon filter cloth (44).

9. An adsorption tower according to any one of claims 1-4, characterized in that, The adsorption tower also includes a diversion component (4) and a support component (7) located at the bottom of the diversion component (4). The support component (7) includes an elastic ring (71) and a flexible tube (72) sleeved on the outside of the elastic ring (71). The elastic ring (71) contacts the cavity wall of the adsorption chamber and the diversion component (4) through the flexible tube (72).

10. A pressure swing adsorption oxygen generator, characterized in that, Including the adsorption tower as described in any one of claims 1-9 above.

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