Nitrogen exhaust muffling structure of portable oxygen generator

Abstract

This utility model discloses a nitrogen-exhausting and noise-reducing structure for a portable oxygen concentrator, including a noise-reducing mechanism housing, with a diffuser plate inserted and installed at the lower end of the inner wall of the inner guide tube. This portable oxygen concentrator's nitrogen-exhausting and noise-reducing structure utilizes a honeycomb-shaped guide plate to divide high-speed airflow into multiple low-speed airflows, reducing turbulence. Furthermore, it absorbs noise of different frequency bands step-by-step by filling with gradient-density sound-absorbing cotton. The spiral-patterned inner guide tube extends the airflow path, reducing flow velocity and friction noise. The polyurethane layer and rubber material of the noise-reducing mechanism housing then block residual noise from being transmitted outwards. The porous diffuser plate evenly distributes airflow pressure, preventing popping sounds caused by localized high pressure, resulting in better noise reduction. The noise-reducing mechanism housing is easily disassembled and assembled via threaded slots, and the guide plate, sound-absorbing cotton, and diffuser plate can be screwed together for quick disassembly and replacement.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, specifically to a nitrogen exhaust and noise reduction structure for a portable oxygen concentrator. Background Technology

[0002] Portable oxygen concentrators are easy to carry or transport. They produce oxygen with the same effect as desktop oxygen concentrators, and operate on a similar principle. They mostly utilize PSA (Pressure Swing Adsorption) and VPSA technologies, but require nitrogen removal during use.

[0003] Existing portable oxygen concentrators separate oxygen and nitrogen from the air using molecular sieve adsorption. The separated nitrogen needs to be discharged from the equipment through the exhaust port. However, there are shortcomings. The nitrogen exhaust channel design of existing equipment is simple, usually using a straight pipe or a single sound-absorbing cotton structure. This results in high noise, limited sound absorption effect, uneven airflow distribution, and the components cannot be disassembled and replaced inconveniently. Therefore, a nitrogen exhaust and sound absorption structure for portable oxygen concentrators is needed to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a nitrogen exhaust and noise reduction structure for a portable oxygen generator, in order to solve the problems mentioned in the background art, such as the simple design of the nitrogen exhaust channel, which usually adopts a straight-through pipe or a single sound-absorbing cotton structure, resulting in high noise, limited noise reduction effect, uneven airflow distribution, and inconvenient replacement of components that cannot be independently disassembled.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a nitrogen-exhausting and noise-reducing structure for a portable oxygen concentrator, comprising a noise-reducing mechanism outer shell and an oxygen concentrator body. The noise-reducing mechanism outer shell is inserted and installed on one side of the oxygen concentrator body, and a nitrogen exhaust pipe is connected and installed at the other end of the noise-reducing mechanism outer shell. A threaded slot is provided on one side of the oxygen concentrator body, and the noise-reducing mechanism outer shell is inserted and installed into the threaded slot. A reinforcing block is fitted onto one side of the outer wall of the noise-reducing mechanism outer shell. A threaded mounting groove is provided on the edge of the other end of the noise-reducing mechanism outer shell, and a threaded mounting ring is screwed onto the inner wall of the threaded mounting groove. The other end of the mounting ring is fixedly connected to a connecting cap, and the nitrogen venting pipe is rotatably connected to the connecting cap. A polyurethane layer is inserted into the inner wall of the outer shell of the silencing mechanism, and an inner guide tube is inserted into the inner wall of the polyurethane layer. Both the inner guide tube and the outer wall of the polyurethane layer are fixedly connected to a positioning block, and the positioning block is inserted into a positioning slot. The positioning slot is opened in the outer shell of the silencing mechanism and the inner wall of the polyurethane layer. Threaded splicing grooves are opened at both the upper and lower ends of the inner wall of the inner guide tube, and a guide plate and sound-absorbing cotton are inserted into the upper end of the inner wall of the inner guide tube. A diffuser plate is inserted into the lower end of the inner wall of the inner guide tube.

[0006] Preferably, the outer shell of the silencing mechanism is screwed into the oxygen generator body via a threaded slot, and the outer shell of the silencing mechanism is supported and fixed to the oxygen generator body via a reinforcing block. The outer wall of the outer shell of the silencing mechanism is made of rubber.

[0007] Preferably, the nitrogen venting pipe and connecting cover are installed in a screw-on, sealed assembly with the outer shell of the silencer mechanism via a threaded mounting ring and a threaded mounting groove.

[0008] Preferably, the guide plate has a honeycomb structure, the sound-absorbing cotton has an inner and outer gradient density structure, and the sound-absorbing cotton and the guide plate are screwed and superimposed on the inner guide pipe through a threaded splicing groove.

[0009] Preferably, the diffuser plate has a uniform through-hole structure, and the diffuser plate is installed by screwing together the inner guide tube through a threaded splicing groove.

[0010] Preferably, the inner guide tube has a spiral pattern on its inner wall, and the inner guide tube and the polyurethane layer are installed in a double-layer positioning and insertion splicing manner with the outer shell of the silencing mechanism through positioning blocks and positioning slots.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: The nitrogen exhaust and noise reduction structure of this portable oxygen concentrator can divide the high-speed airflow into multiple low-speed airflows by using a honeycomb-shaped guide plate, reducing turbulence. Furthermore, by filling with gradient density sound-absorbing cotton, it absorbs noise of different frequency bands step by step. Moreover, the spiral-patterned inner guide tube extends the airflow path, reduces the flow velocity, and reduces friction noise. Then, the polyurethane layer and rubber material of the outer shell of the noise reduction mechanism block the transmission of residual noise outward. In addition, the porous diffuser plate evenly distributes the airflow pressure, avoiding the popping sound generated by local high pressure, resulting in better noise reduction effect. Moreover, the outer shell of the noise reduction mechanism is easy to quickly disassemble and assemble through the threaded slot. The inner guide tube and polyurethane layer can be independently positioned and disassembled through the positioning blocks and positioning slots. Furthermore, the guide plate, sound-absorbing cotton, and diffuser plate can be screwed together and quickly disassembled and assembled through the threaded splicing groove, making it convenient for replacement and use. Attached Figure Description

[0012] Figure 1 This is a diagram showing the assembly of the nitrogen exhaust and noise reduction structure of the portable oxygen generator of this utility model.

[0013] Figure 2 This is a three-dimensional internal structure diagram of the nitrogen exhaust and noise reduction structure of the portable oxygen generator of this utility model;

[0014] Figure 3 This is a top view of the nitrogen exhaust and noise reduction structure of the portable oxygen generator of this utility model;

[0015] Figure 4 This utility model relates to a nitrogen exhaust and noise reduction structure for a portable oxygen concentrator. Figure 1 Enlarged view of point A in the middle;

[0016] Figure 5 This utility model relates to a nitrogen exhaust and noise reduction structure for a portable oxygen concentrator. Figure 2 Enlarged view at point B in the middle;

[0017] Figure 6 This utility model relates to a nitrogen exhaust and noise reduction structure for a portable oxygen concentrator. Figure 3 Enlarged view of point C in the middle.

[0018] In the diagram: 1. Silencing mechanism outer shell, 2. Nitrogen discharge pipe, 3. Oxygen generator main body, 4. Guide plate, 5. Silencing cotton, 6. Diffuser plate, 7. Inner guide pipe, 8. Polyurethane layer, 9. Threaded slot, 10. Connecting cover, 11. Threaded mounting ring, 12. Threaded mounting groove, 13. Reinforcing block, 14. Threaded splicing groove, 15. Positioning insert, 16. Positioning slot. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-6This utility model provides a technical solution: a nitrogen exhaust and noise reduction structure for a portable oxygen concentrator, including a noise reduction mechanism outer shell 1, a nitrogen exhaust pipe 2, an oxygen concentrator body 3, a guide plate 4, noise reduction cotton 5, a diffuser plate 6, an inner guide pipe 7, a polyurethane layer 8, a threaded slot 9, a connecting cover 10, a threaded mounting ring 11, a threaded mounting groove 12, a reinforcing block 13, a threaded splicing groove 14, a positioning plug 15, and a positioning slot 16. The noise reduction mechanism outer shell 1 is inserted and installed on one side of the oxygen concentrator body 3, and the nitrogen exhaust pipe 2 is connected and installed at the other end of the noise reduction mechanism outer shell 1. The noise reduction mechanism outer shell 1 is screwed and connected to the oxygen concentrator body 3 through the threaded slot 9, and the noise reduction mechanism outer shell 1 is supported and fixedly installed to the oxygen concentrator body 3 through the reinforcing block 13. The outer wall of the housing 1 is made of rubber, which allows for quick and easy screwing and disassembly of the silencing mechanism housing 1. It can also be supported and fixed by the reinforcing block 13, ensuring stable installation. The nitrogen exhaust pipe 2 and the connecting cover 10 are screwed and sealed to the silencing mechanism housing 1 via a threaded mounting ring 11 and a threaded mounting groove 12, making it easy to screw and disassemble and replace. A threaded slot 9 is provided on one side of the oxygen generator body 3, and the silencing mechanism housing 1 is inserted into the threaded slot 9 for installation. A reinforcing block 13 is fitted onto one side of the outer wall of the silencing mechanism housing 1. A threaded mounting groove 12 is provided on the other edge of the silencing mechanism housing 1, and a threaded mounting ring 11 is screwed onto the inner wall of the threaded mounting groove 12. The threaded mounting ring 11... One end is fixedly connected to a connecting cap 10, and the nitrogen exhaust pipe 2 is rotatably connected to the connecting cap 10. A polyurethane layer 8 is inserted into the inner wall of the silencing mechanism housing 1, and an inner guide pipe 7 is inserted into the inner wall of the polyurethane layer 8. The inner guide pipe 7 has a spiral pattern on its inner wall, and the inner guide pipe 7 and the polyurethane layer 8 are installed in a double-layer positioning and insertion splicing with the silencing mechanism housing 1 through positioning blocks 15 and positioning slots 16. This allows the inner guide pipe 7 to extend the airflow path, reduce the flow velocity, and reduce friction noise. The outer walls of the inner guide pipe 7 and the polyurethane layer 8 are both fixedly connected to protruding positioning blocks 15, and the positioning blocks 15 are inserted into the positioning slots 16. The positioning slots 16 are opened in the inner walls of the silencing mechanism housing 1 and the polyurethane layer 8. The upper and lower ends of the inner wall of the inner guide pipe 7 are... All are provided with threaded splicing grooves 14, and a guide plate 4 and a sound-absorbing cotton 5 are inserted and installed on the upper end of the inner wall of the inner guide tube 7. The guide plate 4 has a honeycomb structure, and the sound-absorbing cotton 5 has an inner and outer gradient density structure. The sound-absorbing cotton 5 and the guide plate 4 are installed and spliced ​​with the inner guide tube 7 by screwing together through the threaded splicing grooves 14. This allows the guide plate 4 to divide the high-speed airflow into multiple low-speed airflows, reducing turbulence. The sound-absorbing cotton 5 can absorb noise of different frequency bands step by step and is easy to disassemble and replace independently. A diffuser plate 6 is inserted and installed on the lower end of the inner wall of the inner guide tube 7. The diffuser plate 6 has a uniform through hole structure, and the diffuser plate 6 is installed and spliced ​​with the inner guide tube 7 by screwing together through the threaded splicing grooves 14. This allows the diffuser plate 6 to evenly distribute the airflow pressure and avoid the popping sound caused by local high pressure.

[0021] Working principle: When using the nitrogen venting and noise reduction structure of this portable oxygen concentrator, firstly, the device is screwed into the main body 3 of the oxygen concentrator via the threaded slot 9 and reinforced by the reinforcing block 13. Then, the main body 3 of the oxygen concentrator can be started. When nitrogen venting is needed, it flows into the outer shell 1 of the noise reduction mechanism. Then, the high-speed airflow is divided into multiple low-speed airflows by the guide plate 4 to reduce turbulence. Then, the noise reduction cotton 5 absorbs different frequency noises in stages. Finally, the spiral pattern of the inner guide tube 7 extends the airflow path and reduces the flow velocity. It reduces friction noise, and then the airflow pressure is evenly distributed through the diffuser plate 6 to avoid the popping sound caused by local high pressure. Then it is discharged through the nitrogen discharge pipe 2. When the silencing mechanism needs to be replaced, the outer shell 1 of the silencing mechanism can be removed, and then the guide plate 4, the sound-absorbing cotton 5, and the diffuser plate 6 can be screwed together and disassembled through the threaded splicing groove 14. The inner guide pipe 7 and the polyurethane layer 8 can be pulled out and disassembled through the positioning plug 15 and the positioning slot 16 for quick positioning and replacement. This is the usage process of the nitrogen discharge silencing structure of this portable oxygen generator.

[0022] 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. A nitrogen-exhausting and noise-reducing structure for a portable oxygen concentrator, comprising a noise-reducing mechanism housing (1) and an oxygen concentrator body (3), wherein the noise-reducing mechanism housing (1) is inserted and installed on one side of the oxygen concentrator body (3), and a nitrogen-exhausting pipe (2) is connected and installed at the other end of the noise-reducing mechanism housing (1), characterized in that: The oxygen generator body (3) has a threaded slot (9) on one side. The silencing mechanism housing (1) is inserted into the threaded slot (9). A reinforcing block (13) is fitted onto one side of the outer wall of the silencing mechanism housing (1). A threaded mounting groove (12) is opened on the other edge of the silencing mechanism housing (1). A threaded mounting ring (11) is screwed onto the inner wall of the threaded mounting groove (12). A connecting cover (10) is fixedly connected to the other end of the threaded mounting ring (11). The nitrogen discharge pipe (2) is rotatably connected to the connecting cover (10). A polyurethane membrane is inserted into the inner wall of the silencing mechanism housing (1). The inner wall of the polyurethane layer (8) is fitted with an inner guide tube (7). The inner guide tube (7) and the outer wall of the polyurethane layer (8) are both connected with a positioning block (15). The positioning block (15) is fitted with a positioning slot (16). The positioning slot (16) is opened on the outer shell (1) of the silencing mechanism and the inner wall of the polyurethane layer (8). The upper and lower ends of the inner wall of the inner guide tube (7) are provided with threaded splicing grooves (14). The upper end of the inner wall of the inner guide tube (7) is fitted with a guide plate (4) and a sound-absorbing cotton (5). The lower end of the inner wall of the inner guide tube (7) is fitted with a diffuser plate (6).

2. The nitrogen exhaust muffling structure of the portable oxygen generator according to claim 1, characterized in that: The outer shell (1) of the silencing mechanism is connected to the oxygen generator body (3) by a threaded slot (9), and the outer shell (1) of the silencing mechanism is supported and fixed to the oxygen generator body (3) by a reinforcing block (13). The outer wall of the outer shell (1) of the silencing mechanism is made of rubber.

3. The nitrogen exhaust muffling structure of the portable oxygen generator according to claim 2, characterized in that: The nitrogen discharge pipe (2) and the connecting cover (10) are screwed and sealed together with the outer shell (1) of the silencer mechanism through the threaded mounting ring (11) and the threaded mounting groove (12).

4. The nitrogen exhaust muffling structure of the portable oxygen generator according to claim 3, characterized in that: The guide plate (4) has a honeycomb structure, the sound-absorbing cotton (5) has an inner and outer gradient density structure, and the sound-absorbing cotton (5) and the guide plate (4) are connected and spliced ​​with the inner guide pipe (7) by a threaded splicing groove (14).

5. The nitrogen exhaust muffling structure of the portable oxygen generator according to claim 4, characterized in that: The diffuser plate (6) has a uniform through hole structure, and the diffuser plate (6) is installed by screwing together the inner guide pipe (7) through the threaded splicing groove (14).

6. The nitrogen exhaust muffling structure of the portable oxygen generator according to claim 5, characterized in that: The inner guide tube (7) has a spiral pattern on the inner wall, and the inner guide tube (7) and the polyurethane layer (8) are installed in a double-layer positioning and insertion splicing with the outer shell (1) of the silencing mechanism through positioning plug (15) and positioning slot (16).

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