Oxygen generator with exhaust gas recovery structure

Abstract

The application relates to the technical field of oxygen generators, in particular to an oxygen generator with waste gas recycling structure, which comprises an outer shell body, an air inlet mechanism installed on the rear side of the outer shell body, a first mounting frame and a second mounting frame internally installed below the outer shell body, an oil-free air compressor connected above the first mounting frame, a filter connected above the oil-free air compressor, a waste gas treatment chamber for recycling waste gas symmetrically installed below the second mounting frame, a gas uniform dispersion assembly internally installed on the right side of the waste gas treatment chamber, an intermittent air inlet control assembly internally connected in the middle of the waste gas treatment chamber, and a first adsorption assembly and a second adsorption assembly sequentially installed on the left side of the waste gas treatment chamber from right to left. The oxygen generator with the waste gas recycling structure can improve the purity of nitrogen in the recycled waste gas, facilitates the reuse of the purified waste gas, reduces energy consumption, improves the environmental protection performance of the oxygen generator, and reduces the influence on the environment.

Description

Technical Field

[0001] This invention relates to the field of oxygen generator technology, specifically to an oxygen generator with a waste gas recovery structure. Background Technology

[0002] Medical oxygen concentrators can separate oxygen from the air and then provide high-purity oxygen to patients in intensive care units or operating rooms, improving the patients' treatment outcomes. Therefore, medical oxygen concentrators are especially important for patients who need long-term oxygen therapy.

[0003] For example, the patent published under the publication number "CN115092891B" entitled "An Oxygen Generator and Method Suitable for High-Altitude Environments" discloses that the high-altitude oxygen generator can provide sufficient pressure difference across the hollow fiber membrane in the plate oxygen generator assembly. Based on the principle of osmosis, oxygen from the ambient gas is discharged on the enriched side of the membrane due to its fast permeation rate, while high-pressure nitrogen-rich gas is transported to the shell for recycling on the stagnation side due to its slow permeation rate. The shell draws in high-pressure nitrogen-rich gas, which on the one hand increases the bearing gas film pressure, increases the bearing capacity, reduces gas leakage, and improves the stability and oxygen generation capacity of the oxygen generator; on the other hand, the expansion wheel can recover and reuse this high-pressure gas, and its low-temperature outlet is directly opposite the motor stator end, which can also effectively cool the motor stator and improve the efficiency of the generator. In addition, the oxygen generator can achieve two different oxygen generation methods by controlling the opening and closing of different solenoid valves in the oxygen generation process: energy-saving mixed oxygen generation and high-purity atmospheric oxygen generation. Among them, energy-saving mixed oxygen generation, i.e., the plate oxygen generator... This technology combines the advantages of both positive and negative pressure processes, meeting the oxygen production needs under low-power, long-term operation conditions. For example, the patent disclosed in existing technology, with publication number "CN104211016B," entitled "An Oxygen Generator," discloses that during air intake, the air supply disc is controlled to rotate. The two air intake channels of the air supply disc correspond to the two first through holes on the air supply fixed disc. Gas enters the air intake channel from the air inlet on the air supply disc, is transmitted from the air intake channel to the corresponding first through hole, and then passes through the third end cap. The oxygen generator body enters through the through hole to generate oxygen. After the oxygen generator body completes oxygen generation, the air supply disk is rotated to make the air outlet channel correspond to the first and second through holes on the air supply fixed plate. The exhaust gas generated by the oxygen generator is discharged from the third through hole of the end cover. The exhaust gas enters the air outlet channel of the air supply disk through the corresponding first through hole, and enters the second part from the opening of the first part of the air outlet channel. Then it is transmitted from the second part to the second through hole of the air supply fixed plate, and then enters the air outlet groove of the end cover and is discharged from the oxygen generator from the air outlet hole.

[0004] In the oxygen generators described above, the waste gas generated inside is discharged through the third through-hole of the end cap during use, and the waste gas cannot be recovered. Since the waste gas is mainly nitrogen and other impurity gases, directly discharging this waste gas not only wastes energy but may also pollute the environment. In particular, inert gases such as nitrogen, although harmless to the atmosphere, may affect the local environment at high concentrations, increase safety hazards, and thus affect the use of the oxygen generator. Therefore, we propose an oxygen generator with a waste gas recovery structure to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide an oxygen generator with a waste gas recovery structure to solve the problem mentioned in the background art that current oxygen generators on the market cannot recover waste gas, which increases safety hazards and thus affects the use of oxygen generators.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an oxygen generator with a waste gas recovery structure, comprising an outer casing and an air intake mechanism installed on the rear side of the outer casing. A first mounting bracket and a second mounting bracket are installed inside the lower part of the outer casing. An oil-free air compressor is connected above the first mounting bracket, and a filter is connected above the oil-free air compressor. Molecular sieve towers are symmetrically placed above the second mounting bracket, and an oxygen storage tank is disposed between the two molecular sieve towers. Waste gas treatment chambers for waste gas recovery are symmetrically installed below the second mounting bracket. A gas uniform dispersion component is installed inside the right side of the waste gas treatment chamber, and an intermittent air intake control component is connected inside the middle of the waste gas treatment chamber. A first adsorption component and a second adsorption component are installed sequentially from right to left on the left side of the waste gas treatment chamber.

[0007] Preferably, a movable base is installed on the bottom surface of the outer casing, and a flow controller is installed on the front side of the outer casing. An oxygen delivery port is connected to the inner surface of the outer casing below the flow controller. A humidification bottle is connected below the oxygen delivery port. The front end of the oxygen storage tank is connected to the oxygen delivery port for delivering oxygen from the oxygen storage tank to the oxygen delivery port.

[0008] Preferably, a second mounting bracket is fixed to the front side of the first mounting bracket. The exhaust end in front of the air intake mechanism is connected to a filter mounted on the top of the first mounting bracket. A rotary separator valve is installed in the middle of the second mounting bracket. The lower left end of the filter is connected to an oil-free air compressor via a first delivery pipe. The right end of the oil-free air compressor is connected to the bottom of the rotary separator valve via a second delivery pipe. The upper part of the rotary separator valve is connected to the lower part of two molecular sieve towers via a pipe. A one-way valve is connected to the upper part of the two molecular sieve towers via a pipe. An oxygen storage tank is connected to the lower part of the one-way valve. The molecular sieve towers, one-way valves, and oxygen storage tank are all connected to the front side of the first mounting bracket. The lower part of the rotary separator valve is connected to two waste gas treatment chambers on the left and right sides via two waste gas recovery pipes. The horizontal center line of the waste gas treatment chamber does not coincide with the horizontal center line of the waste gas recovery pipe.

[0009] Preferably, the gas uniform dispersion component includes a vertical rod installed inside the right side of the exhaust gas treatment chamber, and a fan blade assembly is fixed to the outer side of the middle part of the vertical rod. An exhaust gas recovery pipe is provided on the right side of the fan blade assembly. Two first single-turn reciprocating screws are symmetrically installed on the outer side of the vertical rod. A main swaying plate is threaded through the outer side of the first single-turn reciprocating screws. A guide rod installed inside the exhaust gas treatment chamber is provided through the right side of the main swaying plate.

[0010] Preferably, the left side of the main shaking plate is connected to an inclined secondary shaking plate via a connecting shaft, and a first spiral spring is nested on the outside of the connecting shaft. Two rows of fixed push rods are symmetrically installed inside the exhaust gas treatment chamber, and fixed push rods are provided on the outside of the secondary shaking plate.

[0011] Preferably, the front of the exhaust gas treatment chamber is connected to the nitrogen storage chamber via a third conveying pipe. The front end of the nitrogen storage chamber is equipped with a nitrogen discharge pipe that penetrates the front side of the outer shell. The bottom of the exhaust gas treatment chamber is connected to a water storage tank via a pipe. The bottom of the water storage tank is equipped with a drain pipe that penetrates the outer shell and the bottom of the movable base. The adsorbent inside the first adsorption component is copper powder, and the adsorbent inside the second adsorption component is sodium hydroxide.

[0012] Preferably, the intermittent air intake control component includes a uniform air intake frame fixed inside the middle of the exhaust gas treatment chamber. A uniform air intake plate is sealed and fitted to the inner wall of the right side of the uniform air intake frame, which is arranged in a "U" shape. A first air intake hole opened inside the right side of the uniform air intake frame and a second air intake hole opened inside the uniform air intake plate are staggered. Slider blocks are installed at equal intervals on the outer side of the uniform air intake plate. The sliders are slidably connected to the grooves opened on the inner wall of the uniform air intake frame. A support frame is provided on the right side of the uniform air intake frame and is slidably connected to the inner wall of the exhaust gas treatment chamber. A control rod is rotatably connected through the inside of the support frame. The left end of the control rod passes through the middle of the uniform air intake frame and the uniform air intake plate. The control rod is sealed and slidably connected to the uniform air intake frame. The control rod and the uniform air intake plate are rotatably connected through a sealed bearing.

[0013] Preferably, a first bevel gear is keyed to the upper outer side of the vertical rod, and the first bevel gear is fan-shaped.

[0014] Preferably, a second single-turn reciprocating screw is installed in a slot on the upper inner wall of the exhaust gas treatment chamber. A second bevel gear is keyed to the outer right end of the second single-turn reciprocating screw. The second bevel gear is intermittently meshed with the first bevel gear. A movable plate is threaded to the outer left end of the second single-turn reciprocating screw. The lower part of the movable plate is connected to a support movable frame.

[0015] Preferably, agitator plates are installed at equal intervals on the outer side of the left end of the control rod, and a control rope is wound around the outer side of the right end of the control rod. The rear end of the control rope passes through the guide wheel inside the rear side of the support frame and connects to the inner wall of the exhaust gas treatment chamber. A second spiral spring is nested on the outer side of the right end of the control rod, and one end of the second spiral spring is connected to the right side of the support frame.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the oxygen generator with a waste gas recovery structure can improve the purity of nitrogen in the recovered waste gas, facilitate the reuse of the purified waste gas, reduce energy consumption, thereby improving the environmental friendliness of the oxygen generator and reducing its impact on the environment. The specific details are as follows:

[0017] The waste gas treatment chamber not only allows for the recycling and temporary storage of waste gas, but also removes small amounts of oxygen from the waste gas through the first adsorption component with copper powder as the adsorbent, and removes carbon dioxide from the waste gas through the second adsorption component with sodium hydroxide as the adsorbent. This improves the purity of nitrogen in the recycled waste gas, facilitates the reuse of the purified waste gas, reduces energy consumption, and thus improves the environmental friendliness of the oxygen generator and reduces its impact on the environment.

[0018] The reciprocating up-and-down movement of the main and auxiliary oscillating plates facilitates the agitation of the gas, allowing it to enter the uniform air intake frame evenly. Later, through the combined use of the uniform air intake frame and the uniform air intake plate, the gas can be further evenly dispersed into the first and second adsorption components. This prevents uneven gas distribution caused by excessively strong or weak local airflow, which could reduce adsorption efficiency and prevent the adsorbent from being fully utilized. Consequently, the purity and recovery efficiency of nitrogen recovered from the waste gas can be further improved.

[0019] The first bevel gear, which is fan-shaped, drives the second single-rotor reciprocating screw to rotate intermittently. This causes the moving plate to move the support frame and control rod intermittently back and forth. As a result, the control rod drives the uniform air intake plate to intermittently fit and separate from the right side of the uniform air intake frame. Then, the uniform air intake frame and the uniform air intake plate can cooperate to perform intermittent air intake regulation, thereby avoiding excessive local airflow caused by continuous air intake, which is conducive to improving the purity and efficiency of subsequent waste gas recovery.

[0020] Furthermore, when the control lever moves back and forth, the control rope and the second spiral spring work together to drive the control lever to rotate clockwise and counterclockwise, thereby causing the control lever to drive the stirring plate to rotate, which further agitates the gas and improves the uniformity of gas distribution. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the rear view structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of the outer shell of the present invention;

[0024] Figure 4 This is a schematic diagram of the left-side structure of the filter of the present invention;

[0025] Figure 5 This is a schematic diagram of the rear view structure of the filter of the present invention;

[0026] Figure 6 This is a bottom view schematic diagram of the connection between the molecular sieve tower and the rotary separation valve of the present invention;

[0027] Figure 7 This is a schematic diagram of the internal structure of the exhaust gas treatment chamber of the present invention;

[0028] Figure 8 This is a schematic diagram of the three-dimensional structure of the vertical rod of the present invention;

[0029] Figure 9 This is a schematic diagram of the separation structure of the main shaking plate and the auxiliary shaking plate of the present invention;

[0030] Figure 10 This is a partial cross-sectional view of the connection between the support frame and the exhaust gas treatment chamber of the present invention;

[0031] Figure 11 This is a schematic diagram of the left-side structure of the uniform air intake frame of the present invention;

[0032] Figure 12 This is a partial cross-sectional view of the uniform air intake frame and the supporting movable frame of the present invention.

[0033] Figure 13 This is a three-dimensional structural diagram of the uniformly moving air intake plate of the present invention.

[0034] In the diagram: 1. Outer casing; 2. Movable base; 3. Flow controller; 4. Humidification bottle; 5. Oxygen inlet; 6. Air intake mechanism; 7. First mounting bracket; 8. Second mounting bracket; 9. Filter; 91. First delivery pipe; 10. Oil-free air compressor; 11. Second delivery pipe; 12. Rotary separator valve; 13. Molecular sieve tower; 14. Check valve; 15. Oxygen storage tank; 16. Waste gas recovery pipe; 17. Waste gas treatment chamber; 171. Third delivery pipe; 18. Water storage tank; 181. Drain pipe; 19. Vertical rod; 191. First single-turn reciprocating screw; 192. First bevel gear; 20. Fan blade assembly; 21. 211. Main shaking plate; 212. Guide rod; 213. Secondary shaking plate; 214. Connecting shaft; 215. First spiral spring; 216. Uniform air intake frame; 227. First air intake hole; 218. First adsorption assembly; 219. Second adsorption assembly; 220. Fixed push rod; 221. Second single-rotation reciprocating screw; 222. Second bevel gear; 223. Moving plate; 224. Support moving frame; 23. Control rod; 24. Control rope; 25. Second spiral spring; 262. Stirring plate; 27. Uniform air intake plate; 283. Second air intake hole; 294. Slider; 20. Nitrogen storage chamber; 215. Nitrogen exhaust pipe. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figures 1-13 The present invention provides the following technical solution:

[0037] Example 1: The oxygen generator with a waste gas recovery structure in this example can not only recover waste gas but also treat it, thereby improving the purity of nitrogen in the waste gas for later reuse. This not only reduces the environmental impact but also reduces energy consumption. See attached diagram for the specific structure. Figures 1-9As shown, the device includes an outer casing 1 and an air intake mechanism 6 mounted on the rear side of the outer casing 1. A first mounting bracket 7 and a second mounting bracket 8 are installed inside the lower part of the outer casing 1. An oil-free air compressor 10 is connected above the first mounting bracket 7, and a filter 9 is connected above the oil-free air compressor 10. Molecular sieve towers 13 are symmetrically placed above the second mounting bracket 8, and an oxygen storage tank 15 is positioned between the two molecular sieve towers 13. A waste gas treatment chamber 17 for waste gas recovery is symmetrically installed below the second mounting bracket 8. A gas uniform dispersion component is installed inside the right side of the waste gas treatment chamber 17, and an intermittent air intake control component is connected inside the middle of the waste gas treatment chamber 17. A first adsorption component 23 and a second adsorption component 24 are installed sequentially from right to left on the left side of the waste gas treatment chamber 17. A movable base 2 is installed on the bottom surface of the outer casing 1, and a flow controller 3 is installed on the front side of the outer casing 1. An oxygen inlet 5 is connected inside the outer casing 1 below the flow controller 3, and a humidification bottle 4 is connected below the oxygen inlet 5. The front end of the oxygen storage tank 15 is connected to the oxygen inlet 5. The system is used to deliver oxygen from the oxygen storage tank 15 to the oxygen delivery port 5. A second mounting bracket 8 is fixed to the front of the first mounting bracket 7. The exhaust end of the air intake mechanism 6 is connected to the filter 9 mounted on the top of the first mounting bracket 7. A rotary separator valve 12 is installed in the middle of the second mounting bracket 8. The lower left end of the filter 9 is connected to the oil-free air compressor 10 through the first delivery pipe 91. The right end of the oil-free air compressor 10 is connected to the bottom surface of the rotary separator valve 12 through the second delivery pipe 11. The upper part of the rotary separator valve 12... The first mounting bracket 7 is connected to the lower part of two molecular sieve towers 13 via pipes. The upper part of the two molecular sieve towers 13 is connected to a one-way valve 14 via pipes. The lower part of the one-way valve 14 is connected to an oxygen storage tank 15. The molecular sieve towers 13, one-way valves 14 and oxygen storage tank 15 are all connected to the front side of the first mounting bracket 7. The lower part of the rotary separation valve 12 is connected to two waste gas treatment chambers 17 on the left and right sides via two waste gas recovery pipes 16. The horizontal center line of the waste gas treatment chamber 17 does not coincide with the horizontal center line of the waste gas recovery pipe 16.

[0038] The gas uniform dispersion component includes a vertical rod 19 installed inside the right side of the exhaust gas treatment chamber 17, with a fan blade assembly 20 fixed to the outer side of the middle of the vertical rod 19. An exhaust gas recovery pipe 16 is located on the right side of the fan blade assembly 20. Two first single-turn reciprocating screws 191 are symmetrically installed on the outer side of the vertical rod 19. A main oscillating plate 21 is threadedly connected to the outer side of the first single-turn reciprocating screws 191. A guide rod 211 installed inside the exhaust gas treatment chamber 17 is installed through the right side of the main oscillating plate 21. The left side of the main oscillating plate 21 is connected to a connecting shaft 213. An inclined secondary swaying plate 212 is nested with a first spiral spring 214 on the outside of a connecting shaft 213. Two rows of fixed push rods 25 are symmetrically installed inside the exhaust gas treatment chamber 17. Fixed push rods 25 are also provided on the outside of the secondary swaying plate 212. The front of the exhaust gas treatment chamber 17 is connected to a nitrogen storage chamber 30 via a third conveying pipe 171. A nitrogen discharge pipe 31 penetrating the front side of the outer casing 1 is installed at the front end of the nitrogen storage chamber 30. A water storage tank 18 is connected to the bottom of the exhaust gas treatment chamber 17 via a pipe. A penetrating... The drain pipe 181 passes through the bottom surface of the outer casing 1 and the movable base 2. The adsorbent inside the first adsorption component 23 is copper powder, and the adsorbent inside the second adsorption component 24 is sodium hydroxide. The intermittent air intake control component includes a uniform air intake frame 22 fixed inside the middle of the exhaust gas treatment chamber 17. A uniform air intake plate 29 is sealed and fitted to the inner wall of the right side of the uniform air intake frame 22, which is arranged in a "U" shape. The first air intake hole 221 opened inside the right side of the uniform air intake frame 22 and the second air intake hole 291 opened inside the uniform air intake plate 29 are staggered. Slider 292 is installed at equal intervals on the outer side of the uniform air intake plate 29. The slider 292 is slidably connected to the groove opened in the inner wall of the uniform air intake frame 22. A support moving frame 27 is provided on the right side of the uniform air intake frame 22 and is slidably connected to the inner wall of the exhaust gas treatment chamber 17. A control rod 28 is rotatably connected through the inside of the support moving frame 27. The left end of the control rod 28 passes through the middle of the uniform air intake frame 22 and the uniform air intake plate 29. The control rod 28 is slidably connected to the uniform air intake frame 22 in a sealed manner. The control rod 28 is rotatably connected to the uniform air intake plate 29 through a sealed bearing.

[0039] First, the entire medical oxygen concentrator is moved to the usage area via the mobile base 2. After arriving at the usage area, the oxygen concentrator is connected to the power supply, and the air intake mechanism 6 of the suction fan is activated. At this time, the outside air enters the filter 9 through the air intake mechanism 6. After the air is initially filtered by the filter 9, it enters the oil-free air compressor 10 through the first delivery pipe 91. Then, the oil-free air compressor 10 compresses the air and sends it through the second delivery pipe 11 and the rotary separation valve 12 into the two molecular sieve towers 13 for adsorption treatment again. During the adsorption stage, nitrogen is captured by the molecular sieve towers 13, while oxygen is collected. Then, the oxygen enters the oxygen storage tank 15 through the one-way valve 14. Then, the oxygen in the oxygen storage tank 15 is discharged through the oxygen delivery port 5 for use. At the same time, the humidity of the oxygen can be controlled by the humidification bottle 4 to meet different usage needs. Thus, the entire oxygen concentrator separates oxygen from the air and provides high-purity oxygen to patients in the intensive care unit or operating room. (Since this part is existing technology, it will not be described in detail here.)

[0040] During the desorption stage, the molecular sieve tower 13 releases nitrogen gas, forming waste gas. At this time, the waste gas can be introduced from the waste gas recovery pipe 16 into the waste gas treatment chamber 17 through the rotary separation valve 12. The waste gas entering the waste gas treatment chamber 17 is then blown towards the front part of the fan blade assembly 20, which in turn causes the fan blade assembly 20 to drive the vertical rod 19 and the first single-turn reciprocating screw 191 to rotate clockwise. When the first single-turn reciprocating screw 191 rotates, it drives the main rocking plate 21 and the auxiliary rocking plate 212 connected by the outer thread to move up and down reciprocally. At the same time, when the auxiliary rocking plate 212 moves towards the corresponding fixed push rod 25... During movement, the fixed push rod 25 applies a thrust to the auxiliary swaying plate 212, causing it to rotate in the opposite direction around the connecting shaft 213. At this time, the first spiral spring 214 stores energy. When the auxiliary swaying plate 212 moves in the opposite direction and separates from the fixed push rod 25, the stored energy in the first spiral spring 214 quickly drives the auxiliary swaying plate 212 to rotate back to its original position. This allows the auxiliary swaying plate 212 to move up and down reciprocally while rotating at a certain angle. Therefore, the main swaying plate 21 and the auxiliary swaying plate 212 can agitate the incoming exhaust gas, making the exhaust gas more hygienic. The exhaust gas enters the uniform air intake frame 22 evenly through the first air intake hole 221, and then exits to the left evenly through the second air intake hole 291 in the uniform air intake plate 29. This allows the exhaust gas to enter the first adsorption component 23 and the second adsorption component 24 in sequence and evenly, thus avoiding excessively strong or weak local airflow and uneven gas distribution, thereby improving adsorption efficiency and ensuring full utilization of the adsorbent. At this time, the copper powder adsorbent in the first adsorption component 23 reacts with the oxygen in the exhaust gas to generate copper oxide, which remains in the first adsorption component 23, and then effectively removes the small amount of oxygen in the exhaust gas. A large amount of oxygen is removed, and then the sodium hydroxide adsorbent in the second adsorption component 24 reacts with the carbon dioxide in the waste gas. The resulting sodium carbonate remains in the second adsorption component 24, and the generated water flows into the water storage tank 18 for collection. It can be discharged through the drain pipe 181 later. Then, the treated waste gas contains only nitrogen, which can further improve the purity and recovery efficiency of nitrogen in the waste gas, making it easier to recover and reuse nitrogen later. Then, the nitrogen enters the nitrogen storage chamber 30 through the third conveying pipe 171 for storage, and can be discharged through the nitrogen discharge pipe 31 later.

[0041] Example 2: The oxygen generator with a waste gas recovery structure in this example, based on Example 1, can intermittently regulate the intake of waste gas, thereby avoiding excessively strong local airflow caused by continuous intake. This further improves the uniformity of gas distribution, facilitating higher purity and efficiency of subsequent waste gas recovery. See attached diagram for the specific structure. Figures 7-8 and appendix Figures 10-11As shown, a first bevel gear 192 is keyed to the upper outer side of the vertical rod 19. The first bevel gear 192 is fan-shaped. A second single-turn reciprocating screw 26 is installed in a slot on the upper inner wall of the exhaust gas treatment chamber 17. A second bevel gear 261 is keyed to the right outer side of the second single-turn reciprocating screw 26. The second bevel gear 261 and the first bevel gear 192 are intermittently meshed. A moving plate 262 is threaded to the left outer side of the second single-turn reciprocating screw 26. The lower part of the moving plate 262 is connected to the support moving frame 27.

[0042] When the vertical rod 19 rotates, it drives the first bevel gear 192 to rotate. Since the first bevel gear 192 is fan-shaped (one part of the outer side of the first bevel gear 192 has serrations, and the other part does not), the first bevel gear 192 can intermittently mesh with the second bevel gear 261. When the first bevel gear 192 rotates to the position where it meshes with the second bevel gear 261, the first bevel gear 192 drives the second bevel gear 261 and the second single-turn reciprocating screw 2. 6 rotates, and when the second single-turn reciprocating screw 26 rotates, it drives the moving plate 262 to move to the left. At this time, the moving plate 262 drives the support moving frame 27 and the control rod 28 to move to the left together. At this time, the control rod 28 drives the uniform air intake plate 29 to move to the left. At this time, the slider 292 on the outer side of the uniform air intake plate 29 slides stably in the groove on the inner wall of the uniform air intake frame 22, so that the uniform air intake plate 29 slides stably in contact with the uniform air intake frame 22. When the first bevel gear 192 rotates to the second bevel gear 292, the second bevel gear 292 rotates to the left. When gear 261 is in the disengaged position, the second single-turn reciprocating screw 26 stops rotating, and the uniform air intake plate 29 remains stationary. At this point, there is a gap between the uniform air intake plate 29 and the right side of the uniform air intake frame 22, causing the gas to flow uniformly to the left through the non-overlapping first air intake hole 221 and second air intake hole 291. When the first bevel gear 192 rotates again to the position where it meshes with the second bevel gear 261, similarly as described above, the second single-turn reciprocating screw 26 rotates, driving the moving plate... 262. The support frame 27 and the control rod 28 move to the right. At this time, the control rod 28 drives the uniform air intake plate 29 to move to the right and fit tightly against the right side of the uniform air intake frame 22. At this time, the gas cannot flow evenly to the left from the first air intake hole 221 and the second air intake hole 291. This operation is repeated so that the uniform air intake frame 22 and the uniform air intake plate 29 can cooperate to perform intermittent air intake regulation, avoid continuous air intake and excessive local airflow, thereby improving the uniformity of gas distribution.

[0043] Example 3: The oxygen generator with a waste gas recovery structure in this example, based on Example 2, can further agitate the gas, thereby further improving the uniformity of gas distribution and facilitating the improvement of the purity and efficiency of subsequent waste gas recovery. The specific structure is shown in the attached diagram. Figures 12-13As shown, stirring plates 283 are installed at equal intervals on the outer side of the left end of the control rod 28, and a control rope 281 is wound around the outer side of the right end of the control rod 28. The rear end of the control rope 281 passes through the guide wheel inside the rear side of the support moving frame 27 and is connected to the inner wall of the exhaust gas treatment chamber 17. A second spiral spring 282 is nested on the outer side of the right end of the control rod 28, and one end of the second spiral spring 282 is connected to the right side of the support moving frame 27.

[0044] When the support frame 27 and control rod 28 move to the left, the control rope 281 is pulled, causing the control rope 281 to rotate the control rod 28 and the stirring plate 283. At this time, the second spiral spring 282 stores energy. When the support frame 27 and control rod 28 move to the right to reset, the stored energy of the second spiral spring 282 can drive the control rod 28 to rotate in the opposite direction to reset. This causes the control rod 28 and the stirring plate 283 to move back and forth intermittently while rotating clockwise and counterclockwise intermittently. As a result, the stirring plate 283 further agitates the gas discharged from the second air inlet 291, thereby further improving the uniformity of gas distribution, so that the gas can enter the first adsorption component 23 and the second adsorption component 24 evenly for processing.

[0045] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An oxygen generator with waste gas recovery structure, comprising an outer shell (1), and an air inlet mechanism (6) installed on the rear side of the outer shell (1), characterized in that: The lower part of the shell body (1) is internally provided with a first mounting frame (7) and a second mounting frame (8), the upper part of the first mounting frame (7) is connected with an oil-free air compressor (10), the upper part of the oil-free air compressor (10) is connected with a filter (9), the upper part of the second mounting frame (8) is symmetrically provided with a molecular sieve tower (13), an oxygen storage tank (15) is arranged between the two molecular sieve towers (13), the lower part of the second mounting frame (8) is symmetrically provided with a waste gas treatment chamber (17) for recycling waste gas, a gas uniform dispersion assembly is internally arranged on the right side of the waste gas treatment chamber (17), an intermittent air inlet control assembly is internally arranged in the middle of the waste gas treatment chamber (17), a first adsorption assembly (23) and a second adsorption assembly (24) are sequentially arranged on the left side of the waste gas treatment chamber (17) from right to left, the gas uniform dispersion assembly comprises a vertical rod (19) arranged in the right side of the waste gas treatment chamber (17), a fan blade assembly (20) is fixed to the outer side of the middle part of the vertical rod (19), a waste gas recycling pipe (16) is arranged on the right side of the fan blade assembly (20), two first single-rotation reciprocating wire rods (191) are symmetrically arranged on the outer side of the vertical rod (19), a main shaking plate (21) is threadedly connected to the outer side of the first single-rotation reciprocating wire rod (191), a guide rod (211) is arranged in the waste gas treatment chamber (17) and penetrates through the right side of the main shaking plate (21), the intermittent air inlet control assembly comprises a uniform air inlet frame (22) fixed to the middle part of the waste gas treatment chamber (17), a uniform air inlet plate (29) is sealingly arranged on the inner wall of the right side of the uniform air inlet frame (22) which is arranged in a "U" shape, first air inlet holes (221) are formed in the right side of the uniform air inlet frame (22) and second air inlet holes (291) are formed in the uniform air inlet plate (29) in a staggered manner, sliding blocks (292) are equidistantly arranged on the outer side of the uniform air inlet plate (29), the sliding blocks (292) are slidingly connected with the sliding grooves formed in the inner wall of the uniform air inlet frame (22), a support moving frame (27) is arranged on the right side of the uniform air inlet frame (22) and slidingly connected with the inner wall of the waste gas treatment chamber (17), a control rod (28) is rotatably arranged in the support moving frame (27), the left end of the control rod (28) penetrates through the middle part of the uniform air inlet frame (22) and the uniform air inlet plate (29), the control rod (28) is sealingly and slidingly connected with the uniform air inlet frame (22), and the control rod (28) is rotatably connected with the uniform air inlet plate (29) through a sealing bearing.

2. The oxygen generator having a waste gas recovery structure according to claim 1, characterized by: The bottom surface of the shell body (1) is provided with a mobile base (2), and the front side of the shell body (1) is provided with a flow controller (3), the inside of the shell body (1) below the flow controller (3) is connected with an oxygen inlet (5), the lower part of the oxygen inlet (5) is connected with a humidification bottle (4), the front end of the oxygen storage tank (15) is communicated with the oxygen inlet (5), and the oxygen storage tank (15) is used for conveying the oxygen in the oxygen storage tank (15) into the oxygen inlet (5).

3. The oxygen generator having a waste gas recovery structure according to claim 1, characterized by: The front side of the first mounting frame (7) is fixed with a second mounting frame (8), the exhaust end in front of the air inlet mechanism (6) is connected with a filter (9) mounted above the first mounting frame (7), a rotary separation valve (12) is mounted in the middle of the second mounting frame (8), the left end of the filter (9) is connected with an oil-free air compressor (10) through a first conveying pipe (91) below, the right end of the oil-free air compressor (10) is connected with the bottom surface of the rotary separation valve (12) through a second conveying pipe (11), the upper side of the rotary separation valve (12) is connected with the lower side of two molecular sieve towers (13) through a pipeline, the upper side of the two molecular sieve towers (13) is connected with a check valve (14) through a pipeline, the lower side of the check valve (14) is connected with an oxygen storage tank (15), the molecular sieve tower (13), the check valve (14) and the oxygen storage tank (15) are all connected to the front side of the first mounting frame (7), the lower side of the rotary separation valve (12) is connected with two waste gas treatment chambers (17) on the left and right sides through two waste gas recovery pipes (16), and the horizontal center line of the waste gas treatment chamber (17) does not coincide with the horizontal center line of the waste gas recovery pipe (16).

4. The oxygen generator having a waste gas recovery structure according to claim 1, characterized by: The left side of the main swing plate (21) is connected with an inclined auxiliary swing plate (212) through a connecting shaft rod (213), the outer side of the connecting shaft rod (213) is nested with a first vortex spring (214), two rows of fixed push rods (25) are symmetrically installed in the waste gas treatment chamber (17), and the outer side of the auxiliary swing plate (212) is provided with the fixed push rod (25).

5. The oxygen generator having a waste gas recovery structure according to claim 1, characterized by: The front side of the waste gas treatment chamber (17) is connected with a nitrogen storage chamber (30) through a third conveying pipe (171), the front end of the nitrogen storage chamber (30) is provided with a nitrogen discharge pipe (31) penetrating through the front side of the outer shell (1), the bottom surface of the waste gas treatment chamber (17) is connected with a water storage tank (18) through a pipeline, the bottom surface of the water storage tank (18) is provided with a drain pipe (181) penetrating through the outer shell (1) and the bottom surface of the movable base (2), the adsorbent in the first adsorption assembly (23) is copper powder, and the adsorbent in the second adsorption assembly (24) is sodium hydroxide.

6. The oxygen generator having a waste gas recovery structure according to claim 1, characterized by: The outer side above the vertical rod (19) is keyed with a first bevel gear (192), and the first bevel gear (192) is provided in a fan shape.

7. The oxygen generator having a waste gas recovery structure according to claim 6, characterized by: The inner wall above the waste gas treatment chamber (17) is groovedly installed with a second single-rotation reciprocating screw rod (26), the outer side of the right end of the second single-rotation reciprocating screw rod (26) is keyed with a second bevel gear (261), the second bevel gear (261) is intermittently meshed with the first bevel gear (192), the outer side of the left end of the second single-rotation reciprocating screw rod (26) is threadedly connected with a moving plate (262), and the lower side of the moving plate (262) is connected with a supporting moving frame (27).

8. The oxygen generator having a waste gas recovery structure according to claim 1, characterized by: The left end outer side of the control rod (28) is installed with the agitating plate (283) at equal intervals, the right end outer side of the control rod (28) is connected with the control rope (281) in a winding mode, the rear end of the control rope (281) is connected with the inner wall of the waste gas treatment chamber (17) after passing through the guide wheel in the rear inner side of the support moving frame (27), and the right end outer side of the control rod (28) is connected with the second vortex spring (282) in a nesting mode, one end of the second vortex spring (282) is connected with the right side surface of the support moving frame (27).

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