Molecular sieve adsorption device applied to oxygen generator

Abstract

This application discloses a molecular sieve adsorption device for an oxygen generator, including a body and a cap assembly installed at the end of the body. The body has a first sieving chamber, a second sieving chamber, and a gas storage chamber. The cap assembly includes a cover with: a first airflow section integrally formed with the cover and protruding outward toward the side opposite to the body, forming a first unidirectional gas delivery passage connecting the first sieving chamber and the gas storage chamber; a second airflow section integrally formed with the cover and protruding outward toward the side opposite to the body, forming a second unidirectional gas delivery passage connecting the second sieving chamber and the gas storage chamber; and an oxygen backflushing passage connecting the first sieving chamber and the second sieving chamber. The integral structure of the cover can better withstand the pressure pulsation impact during airflow, and the first and second unidirectional gas delivery passages help improve the surface smoothness of the inner wall of the flow channel and reduce turbulence loss during airflow.

Description

Technical Field

[0001] This application belongs to the field of respiratory therapy equipment technology, specifically relating to a molecular sieve adsorption device applied to an oxygen generator. Background Technology

[0002] Molecular sieve adsorption oxygen generators are important medical devices that separate oxygen from the air through the principle of physical adsorption. Their core components typically include two alternating molecular sieve adsorption towers and a gas storage chamber for storing the sieved gas. Traditional molecular sieve adsorption devices usually consist of a main body and an integrated cover. The main body contains a first sieving chamber, a second sieving chamber, and a gas storage chamber to achieve alternating adsorption and desorption processes, thereby improving oxygen separation efficiency.

[0003] In existing technologies, integrated covers typically have multiple airflow channels, including a first unidirectional air supply passage connecting the first screening chamber and the air storage chamber, a second unidirectional air supply passage connecting the second screening chamber and the air storage chamber, and an oxygen backflushing passage between the first and second screening chambers for oxygen backflushing. In traditional designs, these channels are usually created by opening through slots in the cover body and then pressing a pressure plate onto the through slots to form a closed pipeline. However, this structure has the following technical drawbacks:

[0004] Insufficient sealing performance: Because the unidirectional gas delivery passage and backflush channel are assembled from multiple components (such as the cover and pressure plate), gas leakage is prone to occur at the joints, affecting oxygen production efficiency. To ensure sealing, additional sealing structures such as sealing rings and sealing strips are usually required, leading to complex assembly processes and increased costs. Furthermore, to ensure sealing effectiveness, the sealing structure is usually interference-fitted with the cover and pressure plate, further increasing assembly difficulty. Repeated disassembly and reassembly can easily lead to a loose seal, hindering users from maintaining the molecular sieve adsorption tower after disassembly.

[0005] Complex structure and difficult assembly: Traditional integrated covers require multiple through grooves to be machined on the cover body and assembled with components such as pressure plates and seals. This not only requires high machining precision but also involves complicated assembly steps, affecting production efficiency.

[0006] Poor airflow stability: Spliced ​​channels may lead to irregular airflow paths, increase flow resistance, and even cause gas cross-flow due to poor sealing, reducing oxygen separation efficiency and equipment operating stability. Utility Model Content

[0007] This application provides a molecular sieve adsorption device for use in oxygen generators, which solves the technical problems of traditional molecular sieve adsorption devices, such as complex structure, difficult disassembly and assembly, poor airflow stability and sealing.

[0008] The technical solution adopted in this application is as follows:

[0009] A molecular sieve adsorption device for an oxygen generator includes a body and a cap assembly installed at the end of the body. The body has a first sieving chamber, a second sieving chamber, and a gas storage chamber. The cap assembly includes a cover with the following features: a first airflow section integrally formed with the cover and protruding outward toward a side opposite to the body, wherein a first unidirectional gas delivery passage is formed inside the first airflow section, connecting the first sieving chamber and the gas storage chamber; a second airflow section integrally formed with the cover and protruding outward toward a side opposite to the body, wherein a second unidirectional gas delivery passage is formed inside the second airflow section, connecting the second sieving chamber and the gas storage chamber; and an oxygen backflushing passage for connecting the first sieving chamber and the second sieving chamber.

[0010] The molecular sieve adsorption device described in this application also includes the following additional technical features:

[0011] The cover is provided with a first connecting hole that communicates with the first screening chamber and a second connecting hole that communicates with the second screening chamber. The cover is provided with a ring rib that protrudes outward in the direction away from the machine body. The cover assembly also includes a pressure plate that is detachably connected to the cover. The pressure plate and the ring rib cooperate to form the oxygen backflush passage. The oxygen backflush passage communicates with the first screening chamber and the second screening chamber through the first connecting hole and the second connecting hole, respectively.

[0012] The gland assembly further includes a first throttle valve disposed in the first connecting hole and a second throttle valve disposed in the second connecting hole.

[0013] The cover has a sealing ring groove on the outer periphery of the oxygen backflushing passage, and the pressure cover assembly also includes an elastic sealing element disposed in the sealing ring groove, the elastic sealing element abutting against the cover and the pressure plate respectively.

[0014] The capping assembly further includes a first elastic element and a second elastic element installed on the cap body. The first elastic element and the second elastic element are respectively disposed corresponding to the first sieving chamber and the second sieving chamber. The first elastic element abuts against the molecular sieve adsorbent in the first sieving chamber, and the second elastic element abuts against the molecular sieve adsorbent in the second sieving chamber.

[0015] The cover is provided with a plurality of first limiting ribs and second limiting ribs at the corresponding first screening chamber and second screening chamber, respectively. The plurality of first limiting ribs are spaced apart and respectively abut against and limit the first elastic element, and the plurality of second limiting ribs are spaced apart and respectively abut against and limit the second elastic element.

[0016] The first one-way gas supply passage is provided with a first mounting valve seat at the end corresponding to the gas storage chamber, and the first mounting valve seat is provided with a first one-way valve. And / or, the second one-way gas supply passage is provided with a second mounting valve seat at the end corresponding to the gas storage chamber, and the second mounting valve seat is provided with a second one-way valve.

[0017] The first unidirectional gas delivery passage, the second unidirectional gas delivery passage, and the oxygen backflushing passage are arranged in parallel.

[0018] The cover assembly further includes a first sealing ring gasket disposed between the cover body and the body. The cover body is provided with a plurality of first mounting holes spaced apart along its circumference. The body is provided with a plurality of second mounting holes aligned with it. The cover body is detachably connected to the body by a first fixing rod that passes through the first mounting holes, the first sealing ring gasket, and the second mounting holes in sequence.

[0019] The molecular sieve adsorption device further includes a lower cover installed on the end of the body away from the pressure cap assembly. The lower cover has a first port communicating with the first sieving chamber, a second port communicating with the second sieving chamber, and an oxygen outlet communicating with the gas storage chamber. The first port and the second port are respectively used to supply air to the first sieving chamber and the second sieving chamber or to discharge nitrogen from the first sieving chamber and the second sieving chamber.

[0020] A second sealing ring gasket is provided between the lower cover and the body. The lower cover is provided with a plurality of third mounting holes spaced apart along its circumference. The body is provided with a plurality of fourth mounting holes. The lower cover is detachably connected to the body by a second fixing rod that passes through the third mounting holes, the second sealing ring gasket, and the fourth mounting holes in sequence.

[0021] The first screening chamber and the second screening chamber are located on both sides of the machine body, and the gas storage chamber is located between the first screening chamber and the second screening chamber.

[0022] The adsorption device further includes a first partition plate and a second partition plate located inside the body. The first partition plate and the body cooperate to form the first sieving chamber, the second partition plate and the body cooperate to form the second sieving chamber, and the first partition plate, the second partition plate and the body cooperate to form the gas storage chamber.

[0023] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0024] 1. The capping assembly in the molecular sieve adsorption device of this application includes a cap body and a first airflow section and a second airflow section integrally formed with the cap body. The first airflow section and the second airflow section respectively constitute a first unidirectional gas delivery passage connecting the first sieving chamber and the gas storage chamber, and a second unidirectional gas delivery passage connecting the second sieving chamber and the gas storage chamber. This configuration reduces the number of components in the capping assembly, thereby lowering the assembly difficulty. It not only improves production efficiency but, more importantly, ensures the consistency of the cap body's molding, helping to reduce finished product errors caused by assembly. Furthermore, since the first and second unidirectional gas delivery passages are directly formed during manufacturing, gaps caused by splicing of the gas delivery passages are completely avoided, thus preventing the sealing failure problem of split airflow channels. In addition, during long-term use, the integral structure of the cap body can better withstand the pressure pulsation impact during airflow, and the integrally formed first and second unidirectional gas delivery passages help improve the surface smoothness of the inner wall of the flow channel, effectively reducing turbulence losses during airflow. Furthermore, the convex design of the first and second airflow sections forms the first and second unidirectional gas delivery channels, which can guide the airflow and improve gas delivery efficiency. In addition, the integrated cover structure significantly reduces the disassembly process of the cover assembly. When cleaning the molecular sieve adsorption device, users can easily disassemble the cover assembly for cleaning and maintenance, reducing the difficulty of maintaining and cleaning the molecular sieve adsorption device.

[0025] 2. As a preferred embodiment of this application, the oxygen backflush passage adopts a combination design of a cover ring rib and a detachable pressure plate. This structure not only achieves a good sealing effect but also provides flexible adjustment performance. The ring rib, as part of the pressure plate assembly, seals the oxygen backflush passage under the pressure of the pressure plate, simplifying the structural design while ensuring the function of the oxygen backflush passage. The ring rib protrudes outward from the cover body, forming a closed flow channel with the pressure plate, avoiding assembly errors caused by traditional multi-part assembly. The first and second connecting holes directly communicate with the first and second screening chambers, ensuring a short and direct oxygen backflush airflow path and reducing pressure loss. The detachable pressure plate design facilitates cleaning of the inside of the pressure plate assembly after removal by the user, reducing the probability of dirt accumulating and being difficult to clean, thus helping to reduce the user's cleaning burden.

[0026] 3. As a preferred embodiment of this application, the addition of the first and second throttle valves enables precise control of the oxygen backflushing flow rate. By adjusting the opening of the first and second throttle valves, the desorption pressure required for different molecular sieve adsorption characteristics can be adapted. This ensures sufficient oxygen delivery for nitrogen removal while reducing the probability of molecular sieve particle wear caused by airflow overshoot and minimizing oxygen waste. When the oxygen required for nitrogen removal by the molecular sieve adsorption device changes due to temperature or humidity variations, the oxygen delivery rate can be adjusted using the first or second throttle valve, helping to optimize the working performance of the molecular sieve adsorption device. Furthermore, the first and second throttle valves are respectively installed in the first and second connecting holes at the inlet of the oxygen backflushing passage, directly acting on the initial stage of the airflow to ensure immediate pressure regulation.

[0027] 4. In a preferred embodiment of this application, the sealing ring groove provides guidance for the installation position of the pressure plate, instructing assemblers or users to press the pressure plate into the sealing ring groove. Simultaneously, the positioning design of the sealing ring groove provides a stable installation space for the elastic seal, ensuring its installation stability and forming a double sealing barrier in conjunction with the ring rib. Furthermore, the elastic seal undergoes a certain degree of elastic compression deformation under the pressure of the pressure plate. This compression deformation compensates for microscopic unevenness between the cover and the pressure plate caused by manufacturing precision issues, adapting to slight deformation after long-term use and ensuring the sealing performance of the oxygen backflush passage.

[0028] 5. In a preferred embodiment of this application, the first and second elastic elements continuously provide axial pressure to the molecular sieve adsorbent using their own elastic forces, maintaining the packing density of the molecular sieve adsorbent and ensuring its operational stability. Furthermore, the buffering characteristics of the first and second elastic elements can absorb vibrations in the molecular sieve adsorbent caused by equipment vibrations, mechanical vibrations, etc., reducing frictional losses between molecular sieve particles. This further enhances the operational stability of the molecular sieve adsorbent. Attached Figure Description

[0029] 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:

[0030] Figure 1 This is a schematic diagram of the molecular sieve adsorption device according to one embodiment of this application. Figure 1 ;

[0031] Figure 2 This is a schematic diagram of the structure of the cap assembly in one embodiment of this application. Figure 1 ;

[0032] Figure 3 This is a schematic diagram of the structure of the cap assembly in one embodiment of this application. Figure 2 ;

[0033] Figure 4 This is a schematic diagram of a portion of the molecular sieve adsorption device according to one embodiment of this application. Figure 1 ;

[0034] Figure 5 This is a schematic diagram of the molecular sieve adsorption device according to one embodiment of this application. Figure 2 ;

[0035] Figure 6 This is a schematic diagram of a portion of the molecular sieve adsorption device according to one embodiment of this application. Figure 2 .

[0036] List of components and reference numerals:

[0037] 1. Body; 11. First screening chamber; 12. Second screening chamber; 13. Gas storage chamber;

[0038] 2. Cover body; 21. First airflow section; 211. First one-way air supply passage; 22. Second airflow section; 221. Second one-way air supply passage; 23. First connecting hole; 24. Second connecting hole; 25. Sealing ring groove.

[0039] 3. Oxygen backflush pathway;

[0040] 4 ring reinforcements;

[0041] 5 pressure plates;

[0042] 6. Flexible seals;

[0043] 7. First elastic element;

[0044] 8. Second elastic element;

[0045] 9. First limiting rib;

[0046] 10 Second limiting rib;

[0047] 110 First valve seat installed;

[0048] 120 Second mounting seat;

[0049] 130 First sealing ring gasket;

[0050] 140 lower cover, 1401 first port, 1402 second port, 1403 oxygen outlet;

[0051] 150 Second sealing ring gasket;

[0052] 160 First partition plate;

[0053] 170 Second partition plate. Detailed Implementation

[0054] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0055] Many specific details are set forth in the following description to provide a thorough 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. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0056] 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.

[0057] 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.

[0058] 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 "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a 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.

[0059] like Figures 1 to 4As shown, a molecular sieve adsorption device for an oxygen generator includes a body 1 and a cap assembly installed at the end of the body 1. The body 1 has a first sieving chamber 11, a second sieving chamber 12, and a gas storage chamber 13. The cap assembly includes a cover 2, which has: a first airflow section 21 integrally formed with the cover 2 and protruding outward toward the side opposite to the body 1, and a first unidirectional gas delivery passage 211 forming inside the first airflow section 21 to connect the first sieving chamber 11 and the gas storage chamber 13; a second airflow section 22 integrally formed with the cover 2 and protruding outward toward the side opposite to the body 1, and a second unidirectional gas delivery passage 221 forming inside the second airflow section 22 to connect the second sieving chamber 12 and the gas storage chamber 13; and an oxygen backflushing passage 3 for connecting the first sieving chamber 11 and the second sieving chamber 12.

[0060] The capping assembly in the molecular sieve adsorption device of this application includes a cap body 2 and a first airflow section 21 and a second airflow section 22 integrally formed with the cap body 2. The first airflow section 21 and the second airflow section 22 respectively constitute a first unidirectional gas delivery passage 211 connecting the first sieving chamber 11 and the gas storage chamber 13, and a second unidirectional gas delivery passage 221 connecting the second sieving chamber 12 and the gas storage chamber 13. This configuration reduces the number of components in the capping assembly, thereby lowering the assembly difficulty. It not only improves production efficiency but, more importantly, ensures the consistency of the cap body 2's molding, helping to reduce finished product errors caused by assembly. Furthermore, since the first unidirectional gas delivery passage 211 and the second unidirectional gas delivery passage 221 are directly formed during the manufacturing process, gaps caused by splicing of the gas delivery passages are completely avoided, thus preventing the sealing failure problem of split airflow channels. Furthermore, during long-term use, the integral structure of the cover 2 can better withstand the pressure pulsation impact during airflow, and the one-piece molded first unidirectional air delivery passage 211 and second unidirectional air delivery passage 221 help improve the surface smoothness of the inner wall of the flow channel, effectively reducing turbulence losses during airflow. The outwardly protruding design of the first airflow section 21 and the second airflow section 22, forming the first unidirectional air delivery passage 211 and second unidirectional air delivery passage 221, can guide the airflow and improve gas delivery efficiency. In addition, the integral cover 2 structure significantly reduces the disassembly process of the cap assembly. When cleaning the molecular sieve adsorption device, users can easily disassemble the cap assembly for cleaning and maintenance, reducing the difficulty of maintaining and cleaning the molecular sieve adsorption device.

[0061] Specifically, molecular sieve adsorbents are respectively provided in the first sieving chamber 11 and the second sieving chamber 12. The first sieving chamber 11 and the second sieving chamber 12 alternately separate the target gas in the air and transport it to the gas storage chamber 13. Since nitrogen will adhere to the molecular sieve adsorbents when separating the target gas, nitrogen needs to be removed before the separation can continue. Taking oxygen separation as an example, the molecular sieve adsorbents in the first sieving chamber 11 are in working state, and the molecular sieve adsorbents in the second sieving chamber 12 are in nitrogen removal state. Part of the oxygen separated in the first sieving chamber 11 is transported to the gas storage chamber 13 through the first one-way gas delivery passage 211, and then transported to the next stage through the gas storage chamber 13. The other part is transported to the molecular sieve adsorbents in the second sieving chamber 12 through the oxygen backflushing passage 3 to assist the molecular sieve adsorbents in the second sieving chamber 12 in removing nitrogen. After the molecular sieve adsorbent in the second screening chamber 12 has completed nitrogen removal, the first screening chamber 11 stops screening and the second screening chamber 12 begins screening. Part of the oxygen separated in the second screening chamber 12 is transported to the gas storage chamber 13 through the second one-way gas transmission passage 221, and part of it is transported to the first screening chamber 11 through the oxygen backflushing passage 3 to assist the molecular sieve adsorbent in removing nitrogen.

[0062] As a preferred embodiment of this application, such as Figure 1 , Figure 2 As shown, the cover 2 is provided with a first connecting hole 23 that communicates with the first screening chamber 11 and a second connecting hole 24 that communicates with the second screening chamber 12. The cover 2 is provided with a ring rib 4 that protrudes outward in the direction away from the machine body 1. The cover assembly also includes a pressure plate 5 that is detachably connected to the cover 2. The pressure plate 5 and the ring rib 4 cooperate to form an oxygen backflush passage 3. The oxygen backflush passage 3 communicates with the first screening chamber 11 and the second screening chamber 12 through the first connecting hole 23 and the second connecting hole 24, respectively.

[0063] The oxygen backflush passage 3 adopts a combination design of the cover body 2, the ring rib 4, and the detachable pressure plate 5. This structure not only achieves a good sealing effect but also provides flexible adjustment performance. The ring rib 4, as part of the pressure plate assembly, seals the oxygen backflush passage 3 under the pressure of the pressure plate 5, simplifying the structural design while ensuring the function of the oxygen backflush passage 3. The ring rib 4 protrudes outward from the cover body 2, forming a closed flow channel with the pressure plate 5, avoiding assembly errors caused by traditional multi-part assembly. The first connecting hole 23 and the second connecting hole 24 directly connect to the first screening chamber 11 and the second screening chamber 12, ensuring a short and direct oxygen backflush airflow path and reducing pressure loss. The detachable pressure plate 5 design facilitates cleaning of the inside of the pressure plate assembly after disassembly, reducing the probability of dirt accumulating and being difficult to clean, thus reducing the user's cleaning burden.

[0064] Preferably, the ring rib 4 is integrally formed with the cover body 2, and the ring rib 4 extends in a direction perpendicular to the cover body 2.

[0065] As a preferred embodiment of this implementation, the gland assembly further includes a first throttle valve disposed in the first connecting hole 23 and a second throttle valve disposed in the second connecting hole 24.

[0066] The addition of the first and second throttle valves enables precise control of the oxygen backflushing flow rate. By adjusting the opening of the first and second throttle valves, the desorption pressure required for different molecular sieve adsorption characteristics can be adapted. This ensures sufficient oxygen delivery for nitrogen removal while reducing the probability of molecular sieve particle wear caused by airflow overshoot and minimizing oxygen waste. When the oxygen required for nitrogen removal by the molecular sieve adsorption device changes due to temperature or humidity variations, the oxygen delivery rate can be adjusted using the first or second throttle valve, helping to optimize the working performance of the molecular sieve adsorption device. Furthermore, the first and second throttle valves are respectively installed in the first connecting hole 23 and the second connecting hole 24 at the inlet of the oxygen backflushing passage 3, directly acting on the initial stage of the airflow to ensure immediate pressure regulation.

[0067] As another preferred embodiment of this implementation, such as Figure 2 As shown, the cover 2 has a sealing ring groove 25 on the outer periphery of the oxygen backflush passage 3. The pressure cover assembly also includes an elastic sealing element 6 disposed in the sealing ring groove 25. The elastic sealing element 6 abuts against the cover 2 and the pressure plate 5 respectively.

[0068] The sealing ring groove 25 serves two purposes: firstly, it guides the installation position of the pressure plate 5, instructing assemblers or users to press the pressure plate 5 into the sealing ring groove 25; secondly, the positioning design of the sealing ring groove 25 provides a stable installation space for the elastic seal 6, ensuring the installation stability of the elastic seal 6 and forming a double sealing barrier in conjunction with the ring rib 4. Furthermore, the elastic seal 6 undergoes a certain degree of elastic compression deformation under the pressure of the pressure plate 5. This compression deformation compensates for microscopic unevenness between the cover 2 and the pressure plate 5 caused by manufacturing precision issues, adapts to slight deformation after long-term use, and ensures the sealing performance of the oxygen backflushing passage 3.

[0069] Preferably, the elastic seal 6 is a rubber part, and the elastic seal 6 is interference-fitted with the sealing ring groove 25.

[0070] As a preferred embodiment of this application, such as Figure 3 As shown, the capping assembly also includes a first elastic element 7 and a second elastic element 8 installed on the cap body 2. The first elastic element 7 and the second elastic element 8 are respectively provided for the first sieving chamber 11 and the second sieving chamber 12. The first elastic element 7 abuts against the molecular sieve adsorbent in the first sieving chamber 11, and the second elastic element 8 abuts against the molecular sieve adsorbent in the second sieving chamber 12.

[0071] The first elastic element 7 and the second elastic element 8 continuously provide axial pressure to the molecular sieve adsorbent using their own elastic force, maintaining the packing density of the molecular sieve adsorbent and ensuring its operational stability. Furthermore, the buffering characteristics of the first elastic element 7 and the second elastic element 8 can absorb vibrations in the molecular sieve adsorbent caused by equipment vibrations, mechanical vibrations, etc., reducing frictional losses between molecular sieve particles. This further enhances the operational stability of the molecular sieve adsorbent.

[0072] As a preferred embodiment of this implementation, such as Figure 3 As shown, the cover 2 is provided with a plurality of first limiting ribs 9 and second limiting ribs 10 at the corresponding first screening chamber 11 and second screening chamber 12. The plurality of first limiting ribs 9 are spaced apart and respectively abut against and limit the first elastic member 7, and the plurality of second limiting ribs 10 are spaced apart and respectively abut against and limit the second elastic member 8.

[0073] The first limiting rib 9 and the second limiting rib 10 restrict the deformation direction of the first elastic element 7 and the second elastic element 8, reducing the probability of bending failure caused by lateral bending forces. They also assist the first elastic element 7 and the second elastic element 8 in deforming towards the first sieving chamber 11 and the second sieving chamber 12 to ensure stable compression of the molecular sieve adsorbent.

[0074] Specifically, the first elastic element 7 and the second elastic element 8 are springs, the ends of which are fixedly connected to the cover 2, and the first limiting rib 9 and the second limiting rib 10 respectively abut against the springs.

[0075] As a preferred embodiment of this application, such as Figure 3 As shown, the first one-way gas transmission passage 211 is provided with a first mounting valve seat 110 at the end of the corresponding gas storage chamber 13, and a first one-way valve is installed in the first mounting valve seat 110. The second one-way gas transmission passage 221 is provided with a second mounting valve seat 120 at the end of the corresponding gas storage chamber 13, and a second one-way valve is installed in the second mounting valve seat 120.

[0076] The first mounting seat 110 and the second mounting seat 120 provide stable mounting space for the first and second check valves, respectively. The first and second check valves control the gas delivery from the first screening chamber 11 and the second screening chamber 12 to the gas storage chamber 13. Furthermore, the first mounting seat 110 and the second mounting seat 120 are located at the ends of the first airflow section 21 and the second airflow section 22, ensuring that the valve plate movement direction of the first and second check valves is consistent with the airflow direction, reducing the risk of valve plate jamming or backflow leakage that may occur with oblique installation. In addition, this design allows for modular installation of the first and second check valves; other components of the gland assembly can be manufactured separately before assembling the first and second check valves.

[0077] As a preferred embodiment of this application, such as Figure 2 , Figure 3 As shown, the first unidirectional gas delivery passage 211, the second unidirectional gas delivery passage 221, and the oxygen backflushing passage 3 are arranged in parallel.

[0078] By arranging the first unidirectional gas delivery passage 211, the second unidirectional gas delivery passage 221, and the oxygen backflushing passage 3 in parallel, the airflow organization inside the cover body 2 is optimized, reducing flow resistance. The parallel design of each passage ensures a consistent direction, eliminating the need for frequent changes in airflow direction during transport and reducing frictional losses along the way. The parallel layout also facilitates the casting and molding of the cover body 2, simplifies mold design, and improves product dimensional accuracy and consistency. Furthermore, because each passage follows the same direction, thermal expansion is evenly distributed during temperature changes, reducing structural deformation or sealing failure caused by localized stress concentration. The parallel arrangement of the passages also helps save internal space in the cover assembly, contributing to its miniaturization.

[0079] As a preferred embodiment of this application, such as Figure 4 As shown, the capping assembly also includes a first sealing ring gasket 130 disposed between the cap body 2 and the body 1. The cap body 2 is provided with a plurality of first mounting holes spaced apart along its circumference, and the body 1 is provided with a plurality of second mounting holes aligned with it. The cap body 2 is detachably connected to the body 1 by a first fixing rod that passes through the first mounting hole, the first sealing ring gasket 130 and the second mounting hole in sequence.

[0080] By evenly arranging multiple first mounting holes around the circumference of the cover 2, and with the elastic buffering effect of the first sealing ring gasket 130, the clamping force between the cover 2 and the body 1 is evenly distributed, reducing the probability of leakage caused by localized poor sealing. The detachable design of the first fixing rod makes the installation and removal of the cover 2 more convenient, facilitating maintenance or replacement of the molecular sieve adsorption tower by the user. The multi-hole fixing method not only improves the sealing reliability but also enhances the vibration resistance of the overall structure, reducing the probability of loosening of connections due to airflow pulsation or external impact during equipment operation. This design ensures high sealing performance while taking into account assembly efficiency and maintenance convenience, making it suitable for medical oxygen generation equipment that requires frequent maintenance.

[0081] Preferably, the first sealing ring gasket 130 is made of rubber or silicone, which can maintain elasticity under long-term compression and adapt to the effects of temperature changes and mechanical vibration. The first mounting hole and the second mounting hole are bolt holes, the first fixing rod is a screw, and the cover 2 is connected to the body 1 by bolts.

[0082] As a preferred embodiment of this application, such as Figure 5 As shown, the molecular sieve adsorption device also includes a lower cover 140 installed on the end of the body 1 away from the pressure cap assembly. The lower cover 140 is provided with a first port 1401 communicating with the first sieving chamber 11, a second port 1402 communicating with the second sieving chamber 12, and an oxygen outlet 1403 communicating with the gas storage chamber 13. The first port 1401 and the second port 1402 are respectively used to supply air to the first sieving chamber 11 and the second sieving chamber 12 or to discharge nitrogen from the first sieving chamber 11 and the second sieving chamber 12.

[0083] The integration of a first port 1401, a second port 1402, and an oxygen outlet 1403 on the lower cover 140 optimizes the connection method of the external gas path and improves the overall structural compactness. By centrally locating the first air inlet 1401, the second air inlet 1402, and the oxygen outlet 1403 on the lower cover 140, the airflow path becomes clearer, reducing pipe crossings and bends, and lowering flow resistance. The first port 1401 and the second port 1402 correspond to the first screening chamber 11 and the second screening chamber 12, respectively, ensuring that the paths for air input and nitrogen discharge are completely independent, preventing gas mixing from affecting oxygen purity. The centralized arrangement of the oxygen outlet 1403 facilitates connection to downstream components such as oxygen storage tanks or breathing masks, optimizing the user experience. Furthermore, the modular design of the lower cover 140 allows for pre-testing of the gas path interfaces before installation onto the main body 1, improving production efficiency and product consistency. This structure also facilitates quick removal of the lower cover 140 for later maintenance, allowing for cleaning or replacement of internal components without disassembling the entire gas system.

[0084] As a preferred embodiment of this implementation, such as Figure 6As shown, a second sealing ring gasket 150 is provided between the lower cover 140 and the body 1. The lower cover 140 is provided with a plurality of third mounting holes spaced apart along its circumference. The body 1 is provided with a plurality of fourth mounting holes. The lower cover 140 is detachably connected to the body 1 by a second fixing rod that passes through the third mounting holes, the second sealing ring gasket 150 and the fourth mounting holes in sequence.

[0085] By setting a second sealing ring gasket 150 between the lower cover 140 and the body 1, and using multiple circumferentially distributed third and fourth mounting holes in conjunction with the second fixing rod, a high sealing performance between the lower cover 140 and the body 1 is ensured. The circumferential multi-hole fixing method ensures a uniform distribution of the clamping force between the lower cover 140 and the body 1, reducing the probability of air leakage due to localized poor sealing. Furthermore, the elastic material of the second sealing ring gasket 150 can compensate for machining tolerances and assembly errors, ensuring long-term sealing performance. The detachable design of the second fixing rod allows users to quickly remove and install the lower cover 140 during maintenance without damaging the sealing structure. This design is particularly suitable for oxygen generators requiring frequent maintenance, such as molecular sieve replacement or chamber cleaning. In addition, the multi-hole fixing enhances the rigidity of the overall structure, reducing the risk of loosening of the lower cover 140 due to airflow pulsation or external vibration, and improving the long-term stability of the equipment operation.

[0086] Preferably, the second sealing ring gasket 150 is made of rubber or silicone, which can maintain elasticity under long-term compression and adapt to the effects of temperature changes and mechanical vibration. The third and fourth mounting holes are bolt holes, the second fixing rod is a screw, and the lower cover 140 is connected to the body 1 by bolts.

[0087] As a preferred embodiment of this application, such as Figure 4 , Figure 6 As shown, the first screening chamber 11 and the second screening chamber 12 are located on both sides of the machine body 1, and the gas storage chamber 13 is located between the first screening chamber 11 and the second screening chamber 12.

[0088] This configuration shortens the distances between the first screening chamber 11 and the second screening chamber 12 and the gas storage chamber 13, thereby shortening the oxygen input path, effectively improving oxygen delivery efficiency, and reducing pressure loss. This layout also makes the overall structure more compact, facilitating efficient oxygen production within a limited space. Furthermore, the symmetrical distribution of the first screening chamber 11 and the second screening chamber 12 on both sides of the gas storage chamber 13 ensures synchronized pressure changes during adsorption and desorption stages, improving oxygen separation efficiency. It also promotes uniform heat distribution, preventing localized overheating from affecting molecular sieve performance and extending equipment lifespan.

[0089] As a preferred embodiment of this implementation, such as Figure 4As shown, the adsorption device also includes a first partition plate 160 and a second partition plate 170 located inside the body 1. The first partition plate 160 and the body 1 cooperate to form a first screening chamber 11, the second partition plate 170 and the body 1 cooperate to form a second screening chamber 12, and the first partition plate 160, the second partition plate 170 and the body 1 cooperate to form a gas storage chamber 13.

[0090] The internal structure of the unit 1 is divided into an independent first sieving chamber 11, a second sieving chamber 12, and a gas storage chamber 13 by a first partition plate 160 and a second partition plate 170, thereby improving the structural rigidity and sealing performance of the molecular sieve adsorption device. The partition plates ensure complete isolation between the chambers, reducing the probability of gas cross-flow, and the closed design of the gas storage chamber 13 reduces the infiltration of outside air during oxygen storage, ensuring the purity of the output oxygen. This structure also facilitates mold design and injection molding, improving production consistency and yield. Furthermore, the reinforcing effect of the partition plates increases the overall rigidity of the unit 1, making it less prone to deformation during long-term operation and ensuring the stability of oxygen production performance.

[0091] Preferably, the first partition plate 160 and the second partition plate 170 are integrally formed with the body 1.

[0092] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0093] 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.

[0094] The above description is merely an embodiment of this application and is not intended to limit 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 principle of this application should be included within the scope of the claims of this application.

Claims

1. A molecular sieve adsorption device applied to an oxygen generator, characterized in that, The machine includes a body and a cap assembly installed at the end of the body. The body has a first screening chamber, a second screening chamber, and a gas storage chamber. The cap assembly includes a cover, which has the following features: The first airflow section is integrally formed with the cover and protrudes outward toward the side opposite to the body. The first airflow section forms a first one-way air delivery passage that connects the first screening chamber and the air storage chamber. The second airflow section is integrally formed with the cover and protrudes outward toward the side opposite to the body. The interior of the second airflow section forms a second one-way air delivery passage that connects the second screening chamber and the air storage chamber. An oxygen backflushing passage is used to connect the first screening chamber and the second screening chamber.

2. The molecular sieve adsorption device according to claim 1, characterized in that, The cover is provided with a first connecting hole that communicates with the first screening chamber and a second connecting hole that communicates with the second screening chamber. The cover is provided with a ring rib that protrudes outward in the direction away from the machine body. The cover assembly also includes a pressure plate that is detachably connected to the cover. The pressure plate and the ring rib cooperate to form the oxygen backflush passage. The oxygen backflush passage communicates with the first screening chamber and the second screening chamber through the first connecting hole and the second connecting hole, respectively.

3. The molecular sieve adsorption device according to claim 2, characterized in that, The gland assembly further includes a first throttle valve disposed in the first connecting hole and a second throttle valve disposed in the second connecting hole.

4. The molecular sieve adsorption device according to claim 2, characterized in that, The cover has a sealing ring groove on the outer periphery of the oxygen backflushing passage, and the pressure cover assembly also includes an elastic sealing element disposed in the sealing ring groove, the elastic sealing element abutting against the cover and the pressure plate respectively.

5. The molecular sieve adsorption device according to claim 1, characterized in that, The capping assembly further includes a first elastic element and a second elastic element installed on the cap body. The first elastic element and the second elastic element are respectively disposed corresponding to the first sieving chamber and the second sieving chamber. The first elastic element abuts against the molecular sieve adsorbent in the first sieving chamber, and the second elastic element abuts against the molecular sieve adsorbent in the second sieving chamber.

6. The molecular sieve adsorption device according to claim 5, characterized in that, The cover is provided with a plurality of first limiting ribs and second limiting ribs at the corresponding first screening chamber and second screening chamber, respectively. The plurality of first limiting ribs are spaced apart and respectively abut against and limit the first elastic element, and the plurality of second limiting ribs are spaced apart and respectively abut against and limit the second elastic element.

7. The molecular sieve adsorption device according to claim 1, characterized in that, The first one-way gas supply passage is provided with a first mounting valve seat at the end corresponding to the gas storage chamber, and the first mounting valve seat is provided with a first one-way valve. And / or, the second one-way gas supply passage is provided with a second mounting valve seat at the end corresponding to the gas storage chamber, and the second mounting valve seat is provided with a second one-way valve.

8. The molecular sieve adsorption device according to claim 1, characterized in that, The first unidirectional gas delivery passage, the second unidirectional gas delivery passage, and the oxygen backflushing passage are arranged in parallel.

9. The molecular sieve adsorption device according to claim 1, characterized in that, The cover assembly further includes a first sealing ring gasket disposed between the cover body and the body. The cover body is provided with a plurality of first mounting holes spaced apart along its circumference. The body is provided with a plurality of second mounting holes aligned with it. The cover body is detachably connected to the body by a first fixing rod that passes through the first mounting holes, the first sealing ring gasket, and the second mounting holes in sequence.

10. The molecular sieve adsorption device according to claim 1, characterized in that, The molecular sieve adsorption device further includes a lower cover installed on the end of the body away from the pressure cap assembly. The lower cover has a first port communicating with the first sieving chamber, a second port communicating with the second sieving chamber, and an oxygen outlet communicating with the gas storage chamber. The first port and the second port are respectively used to supply air to the first sieving chamber and the second sieving chamber or to discharge nitrogen from the first sieving chamber and the second sieving chamber.

11. The molecular sieve adsorption device according to claim 10, characterized in that, A second sealing ring gasket is provided between the lower cover and the body. The lower cover is provided with a plurality of third mounting holes spaced apart along its circumference. The body is provided with a plurality of fourth mounting holes. The lower cover is detachably connected to the body by a second fixing rod that passes through the third mounting holes, the second sealing ring gasket, and the fourth mounting holes in sequence.

12. The molecular sieve adsorption device according to claim 1, characterized in that, The first screening chamber and the second screening chamber are located on both sides of the machine body, and the gas storage chamber is located between the first screening chamber and the second screening chamber.

13. The molecular sieve adsorption device according to claim 12, characterized in that, The adsorption device further includes a first partition plate and a second partition plate located inside the body. The first partition plate and the body cooperate to form the first sieving chamber, the second partition plate and the body cooperate to form the second sieving chamber, and the first partition plate, the second partition plate and the body cooperate to form the gas storage chamber.

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