Medical oxygen generator air distribution device

Abstract

This invention relates to the field of medical oxygen generator technology and discloses a gas distribution device for a medical oxygen generator, including an adsorption tower body. A connecting pipe is connected to the bottom end of the adsorption tower body, and a connecting ring is fixedly sleeved on the outer wall of the connecting pipe near its bottom end. A second connecting pipe is also connected to the bottom end of the connecting pipe. By setting up butterfly-shaped flow divider blades and a flow divider plate, air can be divided twice, ensuring that the air reaches the adsorption tower evenly and makes full contact with the molecular sieve inside the adsorption tower. This maximizes the adsorption capacity of the molecular sieve for nitrogen, thereby producing more and higher concentrations of oxygen. By setting up a pressure-adaptive sealing mechanism, the opening of the flow divider orifice can adaptively change according to the airflow rate and pressure, ensuring low flow resistance and high uniformity across a wide operating range, reducing system energy consumption, and significantly improving the adsorption efficiency of the molecular sieve, thus stably producing high-concentration, high-flow-rate oxygen.

Description

Technical Field

[0001] This invention belongs to the field of medical oxygen generator technology, specifically, it relates to a gas distribution device for a medical oxygen generator. Background Technology

[0002] Medical oxygen generators are important clinical medical devices. Their core function is to purify oxygen in the air to a medical-grade concentration (usually ≥90%) by selectively adsorbing nitrogen through molecular sieves in the adsorption tower. Among them, the gas distribution device is a key component connecting the gas source and the adsorption tower, and its performance directly affects the uniformity of contact between air and molecular sieves, adsorption efficiency, and oxygen yield.

[0003] Traditional medical oxygen concentrators often employ simple perforated plates or diverter tubes for gas distribution, relying solely on fixed-diameter diverter holes. This fails to effectively eliminate differences in airflow kinetic energy and directional deviations, leading to localized overload and idle periods in the molecular sieve bed within the adsorption tower. Consequently, the nitrogen adsorption capacity of the molecular sieve cannot be fully activated, limiting oxygen concentration and yield. Furthermore, when the inlet flow rate or pressure increases due to pump fluctuations or changes in user demand, the fixed opening of the diverter holes in traditional gas distribution devices prevents rapid adjustment of the airflow's passage area, potentially causing a sharp increase in downstream pressure loss and even airflow turbulence, further reducing the molecular sieve adsorption efficiency. Therefore, we propose a new gas distribution device for medical oxygen concentrators. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0005] A medical oxygen concentrator air distribution device includes an adsorption tower body. A connecting pipe is connected to the bottom of the adsorption tower body. A connecting ring is fixedly sleeved on the outer wall of the connecting pipe near the bottom. A connecting pipe is also connected to the bottom of the connecting pipe, and a connecting ring is fixedly sleeved on the outer wall of the connecting pipe near the top. The connecting rings are detachably connected by fastening bolts. An air inlet pipe is fixedly inserted through the bottom of the connecting pipe. A pre-treatment mechanism for preliminary air filtration is provided between the air inlet pipe and the connecting pipe. A fixed cylinder is installed on the inner wall of the adsorption tower body near the top. A support ring is installed on the inner wall of the fixed cylinder. A flow divider plate is detachably connected to the top of the support ring by fastening bolts. The flow divider plate has multiple flow divider holes. A pressure-adjusting sealing mechanism is provided above the flow divider holes on the flow divider plate. A support frame is fixedly installed on the inner wall of the connecting pipe near the top. A rotating shaft is movably inserted through the support frame and rotatably connected to the support frame via bearings. Multiple butterfly-shaped flow divider blades are installed on the outer wall of the rotating shaft.

[0006] In a preferred embodiment of the present invention, the pressure-adaptive sealing mechanism includes a protrusion and a fixed ring. A support rod is installed between the outer wall of the support ring and the top of the diverter plate. A connecting shaft is installed at the top of the protrusion, and the connecting shaft movably passes through the fixed ring. A top plate is installed at the top of the connecting shaft. A spring is installed between the top of the protrusion and the bottom of the fixed ring. The spring surrounds the outer wall of the connecting shaft. A magnetic ring is installed at the top of the fixed ring. By setting the connecting shaft, the protrusion and the spring can be limited, ensuring the stability of the protrusion and the spring during compression in use.

[0007] In a preferred embodiment of the present invention, the magnetic ring is magnetically connected to the top plate, and the top plate is made of magnet. By setting the magnetic ring, the magnetic ring and the top plate can attract each other, thereby generating a certain pre-tightening force on the protrusion.

[0008] In a preferred embodiment of the present invention, the pretreatment mechanism includes a water box, a first water pump, a second water pump, and a filter box. The water box is installed on the inner wall of the second connecting pipe. The air inlet pipe is fixedly inserted through the bottom of the water box. Multiple branch pipes are connected to the outer wall of the air inlet pipe near the top. The branch pipes are inserted into the bottom of the water box. A first suction pipe is connected to the input end of the water pump. The filter box is installed on the front of the second connecting pipe. A filter layer is slidably connected to the inner wall of the filter box. A first water guide pipe is connected to the output end of the water pump. The first water guide pipe is connected to one side of the filter box near the top. A second suction pipe is connected to the input end of the second water pump. The second suction pipe is connected to the other side of the filter box near the bottom. A cover is snapped onto the top of the filter box. By providing the cover, the filter box can be sealed and protected.

[0009] In a preferred embodiment of the present invention, the filter layer is made of activated carbon. By setting the filter layer, the water entering the filter box can be filtered and then recycled.

[0010] In a preferred embodiment of the present invention, a second locking block is installed on the outer wall of the filter layer, and a second locking groove is opened on the inner wall of the filter box. The second locking block is engaged in the second locking groove. By setting the second locking block and the second locking groove, the filter layer can be limited and fixed, and it is convenient for personnel to disassemble and replace the filter layer.

[0011] In a preferred embodiment of the present invention, a fixed cylinder 2 is slidably connected to the inner wall of the connecting pipe 1 near the bottom end. A spiral adsorption guide plate is installed on the inner wall of the fixed cylinder 2. A limiting component is provided between the outer wall of the fixed cylinder 2 and the inner wall of the connecting pipe 2. By setting the spiral adsorption guide plate, moisture contained in the air can be adsorbed, avoiding water molecules from affecting the normal use of the molecular sieve in the adsorption tower.

[0012] In a preferred embodiment of the present invention, the spiral adsorption guide plate is made of polyurethane foam board.

[0013] In a preferred embodiment of the present invention, the limiting component includes a locking block and a limiting plate. The locking block is installed on the outer wall of the fixed cylinder, and a locking groove is formed on the inner wall of the bottom end of the connecting pipe. The locking block is engaged in the locking groove. A fixed shaft is installed on the top end of the limiting plate. The fixed shaft is rotatably connected to the bottom end of the locking block through a bearing seat. A limiting groove is formed on the inner wall of the locking groove, and the limiting plate is engaged in the limiting groove. By setting the limiting plate, the limiting plate can be engaged in the limiting groove to limit the locking block, thereby installing the fixed cylinder and facilitating the replacement of the spiral adsorption guide plate after the fixed cylinder is disassembled.

[0014] In a preferred embodiment of the present invention, the first card block is adapted to the first card slot, and the limiting plate is adapted to the limiting slot.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] This invention, by setting up a butterfly-shaped flow-diverting fan blade and a flow-diverting plate, can split the air twice, allowing the air to reach the adsorption tower evenly and make full contact with the molecular sieve inside the adsorption tower. This maximizes the adsorption capacity of the molecular sieve for nitrogen, thereby producing more and higher concentrations of oxygen. By setting up an appropriate pressure sealing mechanism, the opening of the flow-diverting orifice can adaptively correspond to the airflow rate and pressure, ensuring low flow resistance and high uniformity over a wide range of operating conditions. This reduces system energy consumption and significantly improves the adsorption efficiency of the molecular sieve, thereby stably producing high-concentration, high-flow-rate oxygen.

[0017] In this invention, when the airflow passes through the diversion hole, the airflow will collide, shear and mix with each other after being guided by the arc surface of the protrusion. This greatly eliminates the differences in kinetic energy and direction of the airflow from each hole of the diversion plate, and breaks up and mixes the uneven "streams" into a uniform "turbulent field" for a third homogenization, so that the air can come into more uniform and sufficient contact with the molecular sieve in the adsorption tower.

[0018] This invention, by setting up a pretreatment mechanism, can adsorb dust contained in the air, avoiding direct contact between the dust and the molecular sieve, which would reduce the service life of the molecular sieve and ensure the normal adsorption capacity of the molecular sieve. Furthermore, by setting up water pump one, water pump two and filter box, the water in the water box can be continuously circulated, ensuring the adsorption capacity of the water source in the water box and greatly reducing the waste of water resources.

[0019] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0020] In the attached diagram:

[0021] Figure 1This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a front cross-sectional view of the present invention;

[0023] Figure 3 For the present invention Figure 2 Enlarged structural diagram of section A in the middle;

[0024] Figure 4 For the present invention Figure 2 Enlarged structural diagram of section B;

[0025] Figure 5 For the present invention Figure 2 Enlarged structural diagram of section C;

[0026] Figure 6 For the present invention Figure 2 Enlarged structural diagram of section D in the middle;

[0027] Figure 7 This is a schematic cross-sectional view of one side of the filter box of the present invention;

[0028] Figure 8 For the present invention Figure 7 Enlarged structural diagram of section E in the middle;

[0029] Figure 9 This is a schematic diagram of a partial bottom structure of the connecting pipe of the present invention;

[0030] Figure 10 For the present invention Figure 9 Enlarged structural diagram of the middle F section.

[0031] In the diagram: 1. Adsorption tower body; 2. Connecting pipe one; 3. Connecting pipe two; 4. Inlet pipe; 5. Fixed cylinder one; 6. Diverter plate; 7. Diverter hole; 8. Fixing ring; 9. Support rod; 10. Top plate; 11. Magnetic ring; 12. Coupling shaft; 13. Spring; 14. Protrusion; 15. Support ring; 16. Support frame; 17. Rotating shaft; 18. Butterfly-shaped diverter fan blade; 19. Spiral adsorption guide plate; 20. Fixed cylinder two; 21. Locking block one 22. Fixed shaft; 23. Slot 1; 24. Limiting plate; 25. Limiting groove; 26. Branch pipe; 27. Water box; 28. Guide plate; 29. ​​Water pump 1; 30. Suction pipe 1; 31. Water guide pipe 1; 32. Water pump 2; 33. Water guide pipe 2; 34. Suction pipe 2; 35. Filter box; 36. Filter layer; 37. Box cover; 38. Locking block 2; 39. Slot 2; 40. Connecting ring 1; 41. Connecting ring 2. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0033] like Figures 1 to 10 As shown, the present invention provides a technical solution: a medical oxygen concentrator air distribution device, comprising an adsorption tower body 1, a connecting pipe 2 connected to the bottom end of the adsorption tower body 1, a connecting ring 40 fixedly sleeved on the outer wall of the connecting pipe 2 near the bottom end, a connecting pipe 3 connected to the bottom end of the connecting pipe 2, a connecting ring 41 fixedly sleeved on the outer wall of the connecting pipe 3 near the top end, the connecting ring 40 and the connecting ring 41 being detachably connected by fastening bolts, an air inlet pipe 4 fixedly penetrating the bottom end of the connecting pipe 3, and a preliminary air filter provided between the air inlet pipe 4 and the connecting pipe 3. The pretreatment mechanism includes a fixed cylinder 5 installed near the top of the inner wall of the adsorption tower 1. A support ring 15 is installed on the inner wall of the fixed cylinder 5. A diversion plate 6 is detachably connected to the top of the support ring 15 by fastening bolts. Multiple diversion holes 7 are opened on the diversion plate 6. A pressure sealing mechanism is set on the diversion plate 6 above the diversion holes 7. A support frame 16 is fixedly installed near the top of the inner wall of the connecting pipe 2. A rotating shaft 17 is movably passed through the support frame 16 and is rotatably connected to the support frame 16 by bearings. Multiple butterfly-shaped diversion fan blades 18 are installed on the outer wall of the rotating shaft 17.

[0034] Furthermore, the pressure-sealing mechanism includes a protrusion 14 and a fixed ring 8. A support rod 9 is installed between the outer wall of the support ring 15 and the top of the diverter plate 6. A connecting shaft 12 is installed at the top of the protrusion 14. The connecting shaft 12 movably passes through the fixed ring 8. A top plate 10 is installed at the top of the connecting shaft 12. A spring 13 is installed between the top of the protrusion 14 and the bottom of the fixed ring 8. The spring 13 surrounds the outer wall of the connecting shaft 12. A magnetic ring 11 is installed at the top of the fixed ring 8.

[0035] By setting the connecting shaft 12, the protrusion 14 and the spring 13 can be limited to ensure the stability of the protrusion 14 and the spring 13 during compression.

[0036] Furthermore, the magnetic ring 11 is magnetically connected to the top plate 10, and the top plate 10 is made of magnet.

[0037] In this design, by setting up a magnetic ring 11, the magnetic ring 11 and the top plate 10 can be attracted to each other, thereby generating a certain pre-tightening force on the protrusion 14.

[0038] Furthermore, the pretreatment mechanism includes a water box 27, a water pump 29, a water pump 32, and a filter box 35. The water box 27 is installed on the inner wall of the connecting pipe 2. The air inlet pipe 4 is fixedly inserted through the bottom of the water box 27. Multiple branch pipes 26 are connected to the outer wall of the air inlet pipe 4 near the top. The branch pipes 26 are inserted into the bottom of the water box 27. The water pump input end is connected to the suction pipe 30. The filter box 35 is installed on the front of the connecting pipe 2 3. The filter layer 36 is slidably connected to the inner wall of the filter box 35. The water pump output end is connected to the guide pipe 31. The guide pipe 31 is connected to one side of the filter box 35 near the top. The water pump 2 32 input end is connected to the suction pipe 34. The suction pipe 34 is connected to the other side of the filter box 35 near the bottom. The top of the filter box 35 is fitted with a box cover 37.

[0039] The filter box 35 can be sealed and protected by the cover 37.

[0040] Furthermore, the filter layer 36 is made of activated carbon.

[0041] The filter layer 36 allows the water entering the filter box 35 to be filtered and then recycled.

[0042] Furthermore, a second locking block 38 is installed on the outer wall of the filter layer 36, and a second locking groove 39 is opened on the inner wall of the filter box 35, and the second locking block 38 is engaged in the second locking groove 39.

[0043] The filter layer 36 can be fixed by setting the second card block 38 and the second card slot 39, and it is convenient for personnel to disassemble and replace the filter layer 36.

[0044] Furthermore, a fixed cylinder 20 is slidably connected to the inner wall of the connecting tube 2 near the bottom end. A spiral adsorption guide plate 19 is installed on the inner wall of the fixed cylinder 20. A limit component is provided between the outer wall of the fixed cylinder 20 and the inner wall of the connecting tube 3.

[0045] By setting the spiral adsorption guide plate 19, moisture in the air can be adsorbed, preventing water molecules from affecting the normal use of the molecular sieve in the adsorption tower.

[0046] Furthermore, the spiral adsorption guide plate 19 is made of polyurethane foam board.

[0047] Furthermore, the limiting component includes a locking block 21 and a limiting plate 24. The locking block 21 is installed on the outer wall of the fixed cylinder 20. A locking groove 23 is opened on the inner wall of the bottom end of the connecting pipe 2. The locking block 21 is locked in the locking groove 23. A fixed shaft 22 is installed on the top of the limiting plate 24. The fixed shaft 22 is rotatably connected to the bottom end of the locking block 21 through a bearing seat. A limiting groove 25 is opened on the inner wall of the locking groove 23. The limiting plate 24 is locked in the limiting groove 25.

[0048] By setting a limiting plate 24, the limiting plate 24 can be inserted into the limiting groove 25 to limit the first block 21, thereby installing the second fixed cylinder 20, and making it convenient for personnel to disassemble the second fixed cylinder 20 and replace the spiral adsorption guide plate 19.

[0049] Furthermore, the card block 21 is adapted to the card slot 23, and the limiting plate 24 is adapted to the limiting groove 25.

[0050] The operating principle of a medical oxygen concentrator's air distribution device is as follows: During use, air is pumped into the air inlet pipe 4 via an external air pump, and then transported to the water box 27 via the branch pipe 26. The air in the water box 27 comes into contact with water, adsorbing dust particles. Air bubbles generated in the water box 27 are guided upwards by the guide plate 28 and then flow out through the top opening of the guide plate 28. The pre-treated air passes from bottom to top through the spiral adsorption guide plate 19. As it passes through the spiral adsorption guide plate 19, the spiral adsorption guide plate 19... The air is initially treated to adsorb moisture. After being guided by the spiral adsorption guide plate 19, the air continues to flow upward. When it passes through the butterfly-shaped diverting fan blade 18, the butterfly-shaped diverting fan blade 18 will rotate, and the butterfly-shaped diverting fan blade 18 will perform initial diversion of the air. Then, the air after the initial diversion will be diverted again through the diversion hole 7 on the diversion plate 6, so that the air reaches the adsorption tower as evenly as possible, thereby making full contact with the molecular sieve in the adsorption tower, maximizing the adsorption capacity of the molecular sieve to adsorb nitrogen, and thus producing more and higher concentrations of oxygen.

[0051] When the intake airflow enters the intake pipe 4 at the rated pressure, the adsorption force between the magnetic ring 11 and the top plate 10 is balanced with the airflow pressure, and the diversion hole 7 is at the optimal opening of the design.

[0052] When the intake flow rate or pressure increases, the air passing through the diversion hole 7 will push the protrusion 14 upward, causing the protrusion 14 to compress the spring 13. Eventually, the reaction force of the spring 13 will balance the airflow pressure. At this time, the opening of the diversion hole 7 will be larger, allowing more gas to pass through. This avoids a sharp increase in downstream pressure loss due to the increased flow rate. Furthermore, the airflow passing through the diversion hole 7 will collide, shear, and mix with each other after being guided by the arc surface of the protrusion 14. This greatly eliminates the kinetic energy and directional differences of the airflow from each hole of the diversion plate 6, breaking up and mixing the uneven "streams" into a uniform "turbulent field," and performing a third homogenization, making the air more uniform and fully contact the molecular sieve in the adsorption tower.

[0053] During the initial air treatment process, water pump 29 and water pump 32 are activated. Water pump 29 continuously supplies water from water box 27 to filter box 35 through suction pipe 30 and guide pipe 31. The water supplied to filter box 35 flows to the bottom of filter box 35 after passing through filter layer 36. At this time, water pump 32 recirculates the filtered water from the bottom of filter box 35 back to water box 27 through suction pipe 34 and guide pipe 33. Through the above structure, the water in water box 27 can be continuously circulated, ensuring the adsorption capacity of water source in water box 27 and greatly reducing water waste.

Claims

1. A medical oxygen generator air distribution device, comprising an adsorption tower body (1), characterized in that, The bottom end of the adsorption tower (1) is connected to a connecting pipe 1 (2). A connecting ring 1 (40) is fixedly sleeved on the outer wall of the connecting pipe 1 (2) near the bottom end. The bottom end of the connecting pipe 1 (2) is connected to a connecting pipe 2 (3). A connecting ring 2 (41) is fixedly sleeved on the outer wall of the connecting pipe 2 (3) near the top end. The connecting ring 1 (40) and the connecting ring 2 (41) are detachably connected by fastening bolts. An air inlet pipe (4) is fixedly inserted through the bottom end of the connecting pipe 2 (3). A pre-treatment mechanism for preliminary air filtration is provided between the air inlet pipe (4) and the connecting pipe 2 (3). The inner wall of the adsorption tower (1) is installed near the top end. There is a fixed cylinder (5), and a support ring (15) is installed on the inner wall of the fixed cylinder (5). The top of the support ring (15) is detachably connected to a diverter plate (6) by fastening bolts. Multiple diverter holes (7) are opened on the diverter plate (6). A pressure-adjusting sealing mechanism is set on the diverter plate (6) above the diverter holes (7). A support frame (16) is fixedly installed on the inner wall of the connecting pipe (2) near the top. A rotating shaft (17) is movably passed through the support frame (16), and the rotating shaft (17) is rotatably connected to the support frame (16) through a bearing. Multiple butterfly-shaped diverter fan blades (18) are installed on the outer wall of the rotating shaft (17). The pressure-sealing mechanism includes a protrusion (14) and a fixing ring (8). A support rod (9) is installed between the outer wall of the fixing ring (8) and the top of the diverter plate (6). A connecting shaft (12) is installed at the top of the protrusion (14). The connecting shaft (12) movably passes through the fixing ring (8). A top plate (10) is installed at the top of the connecting shaft (12). A spring (13) is installed between the top of the protrusion (14) and the bottom of the fixing ring (8). The spring (13) surrounds the connecting shaft (9). 12) On the outer wall, a magnetic ring (11) is installed at the top of the fixing ring (8); the magnetic ring (11) is magnetically connected to the top plate (10), and the material of the top plate (10) is a magnet; when the intake flow rate enters the intake pipe (4) at the rated pressure, the adsorption force between the magnetic ring (11) and the top plate (10) is balanced with the airflow pressure; when the intake flow rate or pressure increases, the protrusion (14) moves upward, and the airflow passing through the diversion hole (7) will collide with each other after being guided by the arc surface of the protrusion (14).

2. The medical oxygen generator air distribution device according to claim 1, characterized in that, The pretreatment mechanism includes a water box (27), a water pump one (29), a water pump two (32), and a filter box (35). The water box (27) is installed on the inner wall of the connecting pipe two. The air inlet pipe (4) is fixedly inserted through the bottom of the water box (27). Multiple branch pipes (26) are connected to the outer wall of the air inlet pipe (4) near the top. The branch pipes (26) are inserted into the bottom of the water box (27). The input end of the water pump one (29) is connected to a water suction pipe one (30). The filter box (35) is installed on the connecting pipe two. On the front of the second pipe (3), a filter layer (36) is slidably connected to the inner wall of the filter box (35). A water guide pipe (31) is connected to the output end of the first water pump (29). The first water guide pipe (31) is connected to one side of the filter box (35) near the top. A suction pipe (34) is connected to the input end of the second water pump (32). The suction pipe (34) is connected to the other side of the filter box (35) near the bottom. A box cover (37) is snapped onto the top of the filter box (35).

3. The medical oxygen generator air distribution device of claim 2, wherein, The filter layer (36) is made of activated carbon.

4. The medical oxygen generator air distribution device of claim 3, wherein, The outer wall of the filter layer (36) is equipped with a second card block (38), and the inner wall of the filter box (35) is provided with a second card groove (39), and the second card block (38) is engaged in the second card groove (39).

5. The medical oxygen generator air distribution device of claim 1, wherein, The inner wall of the connecting tube 1 (2) is slidably connected to the bottom end of the fixed cylinder 2 (20), and the inner wall of the fixed cylinder 2 (20) is equipped with a spiral adsorption guide plate (19). A limit component is provided between the outer wall of the fixed cylinder 2 (20) and the inner wall of the connecting tube 2 (3).

6. The medical oxygen generator air distribution device of claim 5, wherein, The spiral adsorption guide plate (19) is made of polyurethane foam board.

7. The medical oxygen generator air distribution device of claim 6, wherein, The limiting component includes a locking block (21) and a limiting plate (24). The locking block (21) is installed on the outer wall of the fixed cylinder (20). The inner wall of the bottom end of the connecting pipe (2) is provided with a locking groove (23). The locking block (21) is locked in the locking groove (23). The top end of the limiting plate (24) is equipped with a fixed shaft (22). The fixed shaft (22) is rotatably connected to the bottom end of the locking block (21) through a bearing seat. The inner wall of the locking groove (23) is provided with a limiting groove (25). The limiting plate (24) is locked in the limiting groove (25).

8. The medical oxygen generator air distribution device of claim 7, wherein, The first card block (21) is adapted to the first card slot (23), and the limiting plate (24) is adapted to the limiting groove (25).

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