Oxygen generator

Abstract

The oxygen generator comprises an outer shell and an inner shell located in the outer shell, an air inlet is formed in the outer shell, an air inlet is formed in the inner shell, a first cooling cavity and a second cooling cavity located above the first cooling cavity are formed in the inner shell, and a compressor and a first condensation pipe communicated with the compressor are arranged in the first cooling cavity; a second condensation pipe and a cooling fan are arranged in the second cooling cavity, the second condensation pipe is communicated with the first condensation pipe and located on an air inlet path of the cooling fan, and an air outlet of the cooling fan is communicated with the first cooling cavity so that the first condensation pipe can be located on an air outlet path of the cooling fan. The first condensation pipe, the second condensation pipe and the compressor are all located on an air path of the cooling fan, and air flow can naturally make contact with the three components, so that the cooling effect is achieved. The number of air paths in the oxygen generator is reduced, the air path structure is simplified, and the flowing efficiency of cooling air flow is improved.

Description

Technical Field

[0001] This application belongs to the field of medical device technology, specifically relating to an oxygen generator. Background Technology

[0002] An oxygen concentrator is a medical device that extracts oxygen from the air through physical or chemical means, primarily used to provide high concentrations of oxygen to patients with hypoxia. Air typically contains 21% oxygen and 79% nitrogen, while an oxygen concentrator can increase the oxygen concentration to 90%–96%, helping people with breathing difficulties improve their blood oxygen levels.

[0003] During the operation of an oxygen concentrator, many of its internal components experience temperature rises, necessitating heat dissipation for these critical components. For instance, as air is pressurized by the compressor, its temperature increases. Excessively hot air entering the molecular sieve cylinder can damage the molecular sieve, reducing its lifespan. Therefore, cooling is achieved through a condenser. The heat exchange efficiency between the condenser and the air directly determines the cooling effect, making the condenser an essential cooling component. Similarly, the compressor generates significant heat during operation. This heat accumulates inside the oxygen concentrator and is difficult to dissipate, leading to excessive temperature rise in the compressor and even the entire oxygen concentrator. This affects the lifespan of various functional components, electrical components, and wiring. Therefore, cooling the compressor is also an indispensable step in the operation of an oxygen concentrator.

[0004] In existing technologies, due to the large number of internal components and the complexity of the structure of oxygen concentrators, it is difficult to design cooling air paths. Therefore, multiple air paths are often designed inside the oxygen concentrator. One air path connects to the compressor for air cooling, and another connects to the condenser for air cooling. In other words, the oxygen concentrator has multiple air paths, each with a relatively single function, used only to cool a specific component that needs cooling. This design approach, on the one hand, further increases the complexity of the already complex oxygen concentrator by constructing multiple air path structures. On the other hand, the airflow directions in the multiple air paths are usually different. Therefore, when multiple airflows converge, they are prone to causing violent airflow disturbances. This not only generates significant noise from airflow collisions, which is detrimental to the user experience, but also easily creates turbulence in the cooling airflow inside the oxygen concentrator, resulting in a significant reduction in airflow efficiency and cooling efficiency. Summary of the Invention

[0005] This application provides an oxygen generator to solve the problems of a large number of internal cooling air passages and different airflow directions in each air passage, which leads to a complex internal air passage structure, making the design and manufacturing difficult, and the noise and turbulence generated by the convergence and collision of multiple airflows, affecting the cooling efficiency.

[0006] The technical solution adopted in this application is as follows:

[0007] An oxygen concentrator includes an outer shell and an inner shell located inside the outer shell. The outer shell has an air inlet, and the inner shell has an air inlet. The inner shell has a first cooling chamber and a second cooling chamber located above the first cooling chamber. The first cooling chamber contains a compressor and a first condenser pipe connected to the air outlet of the compressor. The second cooling chamber contains a second condenser pipe and a cooling fan. The second condenser pipe is connected to the first condenser pipe and is located in the air inlet path of the cooling fan. The air outlet of the cooling fan is connected to the first cooling chamber, so that the first condenser pipe is located in the air outlet path of the cooling fan. Cooling air flows through the air inlet to the air inlet, enters the air inlet path, and is discharged through the air outlet path.

[0008] The compressor is a scroll compressor, with heat dissipation fins on the top and the air outlet located in the middle area of ​​the heat dissipation fins.

[0009] The inner shell also has an air passage located below the first cooling chamber. The bottom wall of the first cooling chamber has a first air passage that connects to the air passage. The cooling fan includes a first fan and a second fan. The first fan has a first air outlet, and the downward projection of the first air outlet is located on the compressor. The second fan has a second air outlet, and the downward projection of the second air outlet covers at least a portion of the area of ​​the first air passage.

[0010] The downward projection positions of the first air outlet and the downward projection positions of the second air outlet are located in the diagonal regions of the first cooling cavity.

[0011] A cooling fan is also provided on the horizontal side of the compressor. The air outlet of the cooling fan faces the compressor. The cooling fan is located between the downward projection of the first air outlet and the second air outlet, and is located in the end area of ​​the first cooling chamber.

[0012] The inner shell also has an air passage chamber located below the first cooling chamber. The bottom wall of the first cooling chamber has a first air passage port connected to the air passage chamber. The bottom of the inner shell is provided with a base, which includes an upper base and a lower base that interlock with each other. The upper base and the lower base cooperate to form the air passage chamber. The upper base is provided with a mounting groove for installing the compressor.

[0013] A partition is provided between the first cooling chamber and the second cooling chamber to separate them. The partition has a connecting port. The cooling fan is fixed to the partition and the air outlet of the cooling fan is connected to the connecting port.

[0014] The oxygen concentrator also includes a flexible mounting bracket, which is fixed to the partition. The flexible mounting bracket has a fixing groove, and the cooling fan is fixed in the fixing groove.

[0015] Both the first and second condenser tubes extend in a spiral shape. The compressor is a scroll compressor. The top of the scroll compressor is provided with heat dissipation fins. The top wall of the first cooling chamber is provided with an air vent that communicates with the cooling fan. The heat dissipation fins have a direct blowing section that corresponds to the air vent above and below. At least a portion of the downward projection of the first condenser tube is located in the direct blowing section.

[0016] The inner shell also has an air passage chamber located below the first cooling chamber and an air outlet chamber located below the air passage chamber. The bottom wall of the first cooling chamber has a first air passage port connected to the air passage chamber, and the bottom wall of the air passage chamber has a second air passage port connected to the air outlet chamber. The first air passage port and the second air passage port are located on opposite sides of the air passage chamber.

[0017] The air outlet chamber is equipped with surrounding ribs, which form a horizontally extending air collection channel. The outer shell is equipped with an exhaust port. The air collection channel has an inlet end and an outlet end. The inlet end and the second air outlet face different directions, and the outlet end is connected to the exhaust port.

[0018] The air collection duct has an extension section and a flared section. The width of the flared section is greater than the width of the extension section. The inlet end is located in the extension section, and the outlet end is located in the flared section.

[0019] The outer casing includes a housing and a bottom shell located below the housing. The air outlet is located inside the bottom shell, and the exhaust port is located on the side wall of the bottom shell.

[0020] The inner shell has a first region and a second region arranged horizontally. The first cooling chamber and the second cooling chamber are located in the first region. An oxygen generation module is arranged in the second region. The oxygen generation module includes an adsorption tower assembly and an oxygen storage tank.

[0021] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0022] 1. In this application, outside air can enter the space between the outer and inner shells through the air inlet of the outer shell, and further enter the interior of the inner shell through the air inlet of the inner shell, thereby forming a cooling airflow for the various functional components inside the oxygen concentrator. Specifically, the inner shell has a first cooling chamber and a second cooling chamber arranged vertically. The lower first cooling chamber houses the compressor and a first condenser tube, while the upper second cooling chamber houses the second condenser tube and a cooling fan. Under the suction action of the cooling fan, the airflow at the air inlet flows through the second cooling chamber to the cooling fan. The second condenser tube is located on the air inlet path of the cooling fan, so as the airflow at the air inlet flows towards the cooling fan, it passes through the second condenser tube, exchanging heat with it and carrying away its heat, thus achieving air cooling. After the airflow reaches the cooling fan, it is blown downwards into the first cooling chamber through the cooling fan outlet. Since the first condenser tube is located on the outlet path, the airflow from the cooling fan comes into contact with the first condenser tube, achieving air cooling for the first condenser tube. At the same time, the compressor is also located in the first cooling chamber, so the airflow blown into the first cooling chamber will also come into contact with the compressor, thus achieving air cooling of the compressor.

[0023] In this way, the first condenser, the second condenser, and the compressor are all located in the airflow path of the cooling fan. As the cooling fan draws in and blows air, the airflow naturally comes into contact with these three components, achieving a cooling effect. Moreover, using the same airflow to cool all three components simultaneously not only reduces the number of airflow paths inside the oxygen concentrator and simplifies the airflow structure, but also makes the cooling airflow direction inside the inner shell more uniform, improving the flow efficiency of the cooling airflow. While improving air cooling efficiency, it also reduces collisions between airflows and the obstruction encountered during flow, helping to maintain laminar flow, thereby reducing noise generated during airflow and improving the user experience.

[0024] 2. In a preferred embodiment of this application, the inner shell further includes an air passage located below the first cooling chamber. The bottom wall of the first cooling chamber has a first air passage opening connected to the air passage opening. The cooling fan includes a first fan and a second fan. The downward projection of the first air outlet of the first fan is located on the compressor, and the downward projection of the second air outlet of the second fan covers at least a portion of the area of ​​the first air passage opening. The projection of the first air outlet on the compressor allows the airflow blown by the first fan to directly blow onto the compressor, improving the heat dissipation effect on at least a portion of the compressor. However, since the airflow blown by the first fan directly onto the compressor, after colliding with the compressor surface, it will accumulate at the compressor, causing poor airflow within the first cooling chamber. Therefore, by aligning the projection of the second air outlet with at least a portion of the area of ​​the first air vent, at least a portion of the airflow from the second fan can directly pass through the first air vent and enter the lower air vent chamber. This airflow increases the airflow velocity at the first air vent, creating a localized low pressure. When the airflow from the first air outlet comes into contact with the compressor, it flows towards the first air vent due to the pressure difference. During this process, the airflow passes over the surface of the compressor, improving the contact effect and extending the contact time, thereby enhancing the heat dissipation of the compressor. Simultaneously, it also increases the airflow efficiency within the first cooling chamber, improving heat exchange efficiency.

[0025] 3. In a preferred embodiment of this application, a cooling fan is also provided on the horizontal side of the compressor. The air outlet of the cooling fan faces the compressor and is located between the downward projections of the first and second air outlets, and at the end region of the first cooling cavity. The air outlet of the cooling fan is horizontally oriented towards the compressor and is located between the projections of the first and second air outlets. The overall airflow direction in the first cooling cavity is from the first air outlet to the second air outlet. Therefore, the cooling fan is located on the airflow path, so that part of the airflow blown into the first cooling cavity from the first and second air outlets is used to cool the compressor, and part of it can also serve as a source of cold air for the cooling fan, so that part of the airflow is drawn into the cooling fan and blown to the compressor. By utilizing the combined action of three fans, the cooling effect of the airflow on the compressor and the first condenser tube is further improved. At the same time, the air outlet positions of the three fans are respectively set at different diagonal points of the first cooling cavity, which not only forms an encircling shape for the compressor, improving the contact effect between the cooling airflow and the compressor, but also makes the airflow direction in the first cooling cavity more consistent, improving the airflow efficiency, and thus improving the cooling efficiency.

[0026] 4. In a preferred embodiment of this application, the oxygen concentrator further includes a flexible mounting bracket, which is fixed to the partition. The flexible mounting bracket has a fixing groove, and the cooling fan is fixed in the fixing groove. The cooling fan is fixed to the partition via the flexible mounting bracket. On the one hand, because flexible materials have better shock absorption, the flexible mounting bracket can block the vibration generated by the cooling fan during operation, reducing the vibration transmitted to the partition and providing good shock absorption for the cooling fan. On the other hand, the flexible material can undergo elastic deformation when compressed, allowing the cooling fan to be inserted into the fixing groove of the flexible bracket through an interference fit. This makes the installation and disassembly of the cooling fan simpler and more convenient, effectively improving assembly and disassembly efficiency compared to fixing methods such as screws. Furthermore, when the cooling fan and the flexible mounting bracket are in an interference fit, the deformation caused by compression of the flexible mounting bracket can seal the gap between them, thus eliminating the need for additional sealing components, simplifying the installation structure, and saving costs.

[0027] 5. In a preferred embodiment of this application, both the first and second condenser tubes extend in a spiral shape. The compressor is a scroll compressor with heat dissipation fins on its top. The top wall of the first cooling chamber has an air vent communicating with a cooling fan. The heat dissipation fins have direct-blowing portions corresponding to the air vents vertically. At least a portion of the downward projection of the first condenser tube is located in the direct-blowing portion. The spirally extending condenser tube can extend its length within a limited space, thereby increasing the time oxygen spends flowing within the condenser tube and improving the cooling effect on oxygen. The downward projection of the air vent covers at least a portion of the first condenser tube and the compressor, allowing the airflow blowing out of the air vent to contact both the first condenser tube and the compressor simultaneously. This enables the same airflow to cool both components, improving heat dissipation efficiency and making the layout of the first condenser tube and the compressor within the first cooling chamber more compact, saving space and facilitating heat exchange with the cooling airflow. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0029] Figure 1 This is a schematic diagram of an oxygen generator according to one embodiment of this application;

[0030] Figure 2 This is a schematic diagram of the internal structure of an oxygen generator according to one embodiment of this application;

[0031] Figure 3 This is an exploded view of the structure of an oxygen generator component according to one embodiment of this application;

[0032] Figure 4 This is a cross-sectional view of an oxygen generator according to one embodiment of this application;

[0033] Figure 5 This is a cross-sectional view of an oxygen generator according to one embodiment of this application from another perspective;

[0034] Figure 6 This is a schematic diagram of the internal structure of an oxygen generator according to one embodiment of this application;

[0035] Figure 7 This is a cross-sectional view of an oxygen generator according to one embodiment of this application;

[0036] Figure 8 This is a schematic diagram of the internal structure of the second cooling chamber according to one embodiment of this application;

[0037] Figure 9 This is a cross-sectional view of an oxygen generator according to one embodiment of this application from another perspective;

[0038] Figure 10 This is a cross-sectional view of an oxygen generator according to one embodiment of this application from another perspective, wherein the dashed lines represent the projections of the first air outlet and the second air outlet;

[0039] Figure 11 This is a cross-sectional view of an oxygen generator according to one embodiment of this application from another perspective, wherein the dashed line represents the projection of the first air outlet;

[0040] Figure 12 This is a cross-sectional view of an oxygen generator according to one embodiment of this application from another perspective, wherein the dashed line represents the projection of the second air outlet;

[0041] Figure 13 This is a schematic diagram of the internal structure of the bottom shell according to one embodiment of this application;

[0042] Figure 14 This is an exploded view of a portion of the oxygen generator structure according to one embodiment of this application;

[0043] Figure 15 This is a cross-sectional view of an oxygen generator according to one embodiment of this application;

[0044] Figure 16 for Figure 15 A magnified view of area A in the middle;

[0045] Figure 17 This is a schematic diagram of the structure of the fixed bracket according to one embodiment of this application;

[0046] Figure 18 This is a cross-sectional view of an intake muffler according to one embodiment of this application;

[0047] Figure 19This is a schematic diagram of an oxygen generator according to one embodiment of this application, wherein the decorative cover is not shown;

[0048] Figure 20 This is a schematic diagram of the structure of an oxygen generation module according to one embodiment of this application;

[0049] Figure 21 for Figure 20 Exploded view of the structure of the oxygen generation module;

[0050] Figure 22 This is a partial cross-sectional view of an oxygen generating module according to one embodiment of this application;

[0051] Figure 23 for Figure 22 A magnified view of area B in the middle;

[0052] Figure 24 This is a schematic diagram of the internal structure of the lower shell according to one embodiment of this application.

[0053] in:

[0054] 1. Outer shell; 11. Air inlet groove; 111. Filter cotton; 112. Shielding cover; 113. Decorative cover; 114. Mating rib; 115. Recessed platform; 12. Air inlet; 13. Exhaust outlet; 14. Shell; 15. Bottom shell; 151. Surrounding rib; 152. Air collection channel; 1521. Inlet end; 1522. Outlet end; 1523. Extension section; 1524. Flared section; 16. Air inlet gap; 17. First zone; 18. Second zone;

[0055] 2 Inner shell; 21 Air inlet; 22 Filter element; 221 Airflow inlet; 222 Airflow outlet; 23 Fixed bracket; 231 Air baffle; 24 Air inlet silencer; 241 Silencing inlet; 242 Silencing outlet; 243 First silencing chamber; 244 Second silencing chamber; 245 Third silencing chamber; 246 First connecting pipe; 247 Second connecting pipe; 25 Air inlet channel; 26 Clearance area; 27 Through; 271 Air inlet buffer chamber; 28 Air inlet gap;

[0056] 3 First cooling chamber; 31 First condenser tube; 32 Compressor; 321 Heat dissipation fins; 322 Direct airflow section; 33 Cooling fan; 34 First air vent;

[0057] 4 Second cooling chamber; 41 Second condenser pipe; 411 Air inlet channel; 42 Cooling fan; 421 First fan; 4211 First air outlet; 422 Second fan; 4221 Second air outlet; 43 Flexible mounting bracket; 431 Fixing groove; 432 Slot;

[0058] 5. Air passage chamber; 51. Second air passage port;

[0059] 6 air outlet chambers;

[0060] 7. Oxygen generating module; 71. Adsorption tower assembly; 711. First adsorption tower; 712. Second adsorption tower; 713. First end cap; 714. Second end cap; 715. Third end cap; 72. Oxygen storage tank; 721. Lower shell; 722. Upper shell; 723. Oxygen inlet chamber; 724. Oxygen outlet chamber; 725. Through port; 726. Baffle; 73. Oxygen outlet connector; 731. Fastening part; 7311. Snap-fit ​​buckle; 732. Stop part; 74. Oxygen inlet connector; 741. Butt joint; 742. Mating groove; 743. Oxygen inlet; 744. Limiting rib; 75. One-way valve; 751. Valve body; 752. Valve core; 7521. Diaphragm; 76. Anti-detachment rib position; 77. Purge channel;

[0061] 8 partitions; 81 connecting ports;

[0062] 9. Base; 91. Upper base; 911. Mounting slot; 92. Lower base. Detailed Implementation

[0063] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0064] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0065] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0066] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0067] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "a particular embodiment," "example," or "specific example," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0068] like Figures 1 to 5 As shown, an oxygen concentrator includes an outer shell 1 and an inner shell 2 located inside the outer shell 1. The outer shell 1 has an air inlet 12, and the inner shell 2 has an air inlet 21. The inner shell 2 has a first cooling chamber 3 and a second cooling chamber 4 located above the first cooling chamber 3. The first cooling chamber 3 is equipped with a compressor 32 and a first condenser pipe 31 connected to the air outlet of the compressor 32. The second cooling chamber 4 is equipped with a second condenser pipe 41 and a cooling fan 42. The second condenser pipe 41 is connected to the first condenser pipe 31 and is located in the air inlet path of the cooling fan 42. The air outlet of the cooling fan 42 is connected to the first cooling chamber 3, so that the first condenser pipe 31 is located in the air outlet path of the cooling fan 42. The cooling airflow flows through the air inlet 12 to the air inlet 21, enters the air inlet path, and is discharged through the air outlet path.

[0069] In this application, outside air can enter the space between the outer shell 1 and the inner shell 2 through the air inlet 12 of the outer shell 1, and further enter the interior of the inner shell 2 through the air inlet 21 of the inner shell 2, thereby forming a cooling airflow for the various functional components inside the oxygen generator. Specifically, the inner shell 2 has a first cooling chamber 3 and a second cooling chamber 4 arranged vertically. The lower first cooling chamber 3 is equipped with a compressor 32 and a first condenser pipe 31, while the upper second cooling chamber 4 is equipped with a second condenser pipe 41 and a cooling fan 42. Under the suction action of the cooling fan 42, the airflow at the air inlet 21 flows through the second cooling chamber 4 to the cooling fan 42. The second condenser pipe 41 is located on the air intake path of the cooling fan 42, so that when the airflow at the air inlet 21 flows towards the cooling fan 42, it passes through the second condenser pipe 41, thereby exchanging heat with the second condenser pipe 41, carrying away the heat from the second condenser pipe 41, and achieving a cooling effect on the second condenser pipe 41. After the airflow reaches the cooling fan 42, it is blown downwards through the air outlet of the cooling fan 42 into the first cooling chamber 3. Since the first condenser pipe 31 is located in the air outlet path, the airflow blown out by the cooling fan 42 will also come into contact with the first condenser pipe 31, achieving air cooling of the first condenser pipe 31. At the same time, the compressor 32 is also located in the first cooling chamber 3, so the airflow blown into the first cooling chamber 3 will also come into contact with the compressor 32, achieving air cooling of the compressor 32.

[0070] In this way, the first condenser pipe 31, the second condenser pipe 41, and the compressor 32 are all located in the air path of the cooling fan 42. During the process of the cooling fan 42 drawing in and blowing out air, the airflow will naturally come into contact with the above three components, achieving a cooling effect. Moreover, using the same airflow to cool the three components simultaneously not only reduces the number of air paths inside the oxygen generator and simplifies the air path structure, but also makes the cooling airflow direction inside the inner shell 2 more uniform and consistent, improving the flow efficiency of the cooling airflow. While improving the air cooling efficiency, it can also reduce the collision between airflows and the obstruction encountered during flow, helping to maintain the airflow in a laminar state, thereby reducing the noise generated during airflow and improving the user experience.

[0071] In addition, a first condenser pipe 31 and a second condenser pipe 41 are respectively installed in the first cooling chamber 3 and the second cooling chamber 4, thereby extending the length of the condenser pipe, increasing the heat dissipation area, and avoiding the situation where the heat dissipation effect is poor due to the stacking of condenser pipes.

[0072] In this application, the first cooling chamber 3 and the second cooling chamber 4 are arranged vertically, that is, in the height direction of the oxygen generator, which conforms to the shape and structure of the oxygen generator, makes reasonable use of the internal space of the oxygen generator, helps to save the volume of the oxygen generator and achieve miniaturization.

[0073] Specifically, such as Figure 1 As shown, the side wall of the outer casing 1 is provided with an inwardly recessed air inlet groove 11. The air inlet groove 11 has a bottom surface and a side wall surface surrounding the outer periphery of the bottom surface. The air inlet 12 is opened on the side wall surface. In a specific embodiment, as shown... Figure 1 , Figure 14 , Figure 15 , Figure 16 As shown, the air inlet 12 is located on the top, bottom, and one side of the left and right sides, so that the air inlet 12 is arranged in a C-shape on the air inlet recess 11. A filter cotton 111 is also provided inside the air inlet recess, so that the outside airflow passes through the filter cotton 111 before entering the air inlet 12. Figure 14 , Figure 19 As shown, the oxygen concentrator also includes a cover 112, which can cover the air inlet groove 11 to block the air inlet 12. Preferably, as Figure 14 As shown, the filter cotton 111 also has a C-shaped structure to block the air inlet 12.

[0074] Furthermore, a short-range gap 16 is provided between the outer shell 1 and the inner shell 2, and the airflow entering through the air inlet 12 flows within the air inlet gap 16. In one embodiment, such as Figure 4 , Figure 5 As shown, the air inlet 12 and the air inlet 21 face different sides so that the airflow flows along the circumference of the inner shell 2 within the air inlet gap 16 to the air inlet 21 and enters the interior of the inner shell 2.

[0075] Preferably, the air used to separate and generate oxygen also enters the air intake gap 16 through the air inlet 12. That is, after the outside air enters the air intake gap 16 from the air inlet 12 of the outer shell 1, it is divided into two streams. One stream flows to the oxygen generating module 7 for oxygen production, and the other stream enters the interior of the inner shell 2 from the air inlet 21 to form a cooling airflow.

[0076] Understandably, after the compressor 32 compresses the air, it is cooled down by passing through the first condenser 31 and the second condenser 41 in sequence, and then delivered to the oxygen generating module 7 to generate oxygen, which is then humidified and delivered to the user.

[0077] This application does not limit the type of compressor 32. Preferably, the compressor 32 is a scroll compressor 32, with heat dissipation fins 321 on the top and the air outlet located in the middle area of ​​the heat dissipation fins 321. Compared to a traditional piston compressor 32, in a scroll compressor 32, the moving scroll plate moves in translational motion rather than rotational motion, eliminating the inertial force and vibration of reciprocating motion. Therefore, mechanical noise and airflow pulsation noise are very low, making it particularly suitable for household applications. Preferably, as shown... Figure 10 As shown, the air outlet is located at the center of the compressor 32. In one embodiment, as... Figure 10As shown, the first condenser tube 31 extends in a spiral shape to form a spiral channel. The axis of the first condenser tube 31 coincides with the center of the compressor 32. The projection of the spiral channel toward the compressor 32 constitutes the central region.

[0078] Of course, in other embodiments, the compressor 32 may also be a piston compressor 32 or other types of compressor 32, which is not limited here.

[0079] As a preferred embodiment of this application, such as Figures 7 to 10 As shown, the inner shell 2 also has an air passage 5 located below the first cooling chamber 3. The bottom wall of the first cooling chamber 3 is provided with a first air passage 34 that connects to the air passage 5. The cooling fan 42 includes a first fan 421 and a second fan 422. The downward projection of the first air outlet 4211 of the first fan 421 is located on the compressor 32. The downward projection of the second air outlet 4221 of the second fan 422 covers at least a part of the area of ​​the first air passage 34.

[0080] The projection of the first air outlet 4211 is located on the compressor 32, allowing the airflow from the first fan 421 to directly blow onto the compressor 32, improving the heat dissipation effect on at least part of the compressor 32. However, the airflow from the first fan 421 blowing directly onto the compressor 32 will accumulate at the compressor 32 after colliding with the surface of the compressor 32, causing poor airflow within the first cooling chamber 3. Therefore, by aligning the projection of the second air outlet 4221 with at least a portion of the area of ​​the first air vent 34, at least a portion of the airflow from the second fan 422 can directly pass through the first air vent 34 and enter the lower air vent chamber 5. This airflow increases the airflow velocity at the first air vent 34, creating a localized low pressure. When the airflow from the first air outlet 4211 comes into contact with the compressor 32, it flows towards the first air vent 34 under the influence of the pressure difference. During this process, the airflow passes over the surface of the compressor 32, improving the contact effect and extending the contact time, thereby enhancing the heat dissipation effect on the compressor 32. Simultaneously, this also increases the airflow efficiency within the first cooling chamber 3, improving heat exchange efficiency.

[0081] Preferably, such as Figure 10 As shown, the projection of the first air outlet 4211 covers the heat dissipation fins 321.

[0082] Specifically, such as Figure 10 As shown, there are multiple first air vents 34, which are arranged in a row along the edge of the first cooling chamber 3. The projection of the second air outlet 4221 covers at least a portion of the area of ​​at least one first air vent 34. That is, as long as at least a portion of the airflow blown out by the second air outlet 4221 can pass directly downward through at least a portion of the first air vent 34, it is not limited here.

[0083] Preferably, such as Figure 10 As shown, the projection of the second air outlet 4221 also covers part of the compressor 32, so that the airflow blown out can also cool the compressor 32.

[0084] Furthermore, such as Figure 9 , Figure 10 As shown, the downward projection position of the first air outlet 4211 and the downward projection position of the second air outlet 4221 are located in the diagonal regions of the first cooling cavity 3, respectively.

[0085] The first air outlet 4211 and the second air outlet 4221 are arranged diagonally, so that they span the two ends of the first cooling chamber 3 at a relatively large distance. This avoids the formation of cooling dead zones and increases the lateral distance between them. The compressor 32 is located between the two outlets, which further increases the path of the airflow from the first air outlet 4211 to the second air outlet 4221, which is the exhaust port 13. This prolongs the contact time between the airflow and the compressor 32 during the flow of the airflow to the first air outlet 34, so that the airflow can make full contact with the compressor 32 as much as possible, flow completely over the surface of the compressor 32, and fully exchange heat with it to cool it down, thereby improving the cooling effect of the compressor 32.

[0086] It should be noted that when the cross-section of the first cooling cavity 3 in this application is quadrilateral, the diagonal region refers to the area near its two opposite corners. When the cross-section of the first cooling cavity 3 is circular, since there are no opposite corners, the diagonal region refers to the two opposite ends along the diameter direction.

[0087] Preferably, such as Figure 10 As shown, regardless of the cross-sectional shape of the first cooling chamber 3, it has a first direction consistent with the front-rear direction of the oxygen generator. Figure 10 (N1), and the second direction consistent with the left and right direction of the oxygen concentrator ( Figure 10 (N2), and the diagonal direction at 30°-60° to the first and second directions ( Figure 10 In the first cooling chamber 3 (N3), the projections of the first air outlet 4211 and the second air outlet 4221 are arranged along the diagonal direction at the edge region of the first cooling chamber 3. For example Figure 10 As shown, the projection of the first air outlet 4211 is located in the upper left corner of the first cooling cavity 3, the projection of the second air outlet 4221 is located in the lower right corner of the first cooling cavity 3, and the first air vent 34 is located along the first direction at the right edge of the first cooling cavity 3. Similarly, the projection of the first air outlet 4211 can also be set at... Figure 10 The projection of the second air outlet 4221 is located in the lower left corner area. Figure 10 The upper right corner area. Preferably, the projections of the first air outlet 4211 and the second air outlet 4221 do not overlap in either the first or second direction.

[0088] Preferably, such as Figure 5 , Figure 10 As shown, a cooling fan 33 is also provided on the horizontal side of the compressor 32. The air outlet of the cooling fan 33 faces the compressor 32. The cooling fan 33 is located between the downward projection of the first air outlet 4211 and the second air outlet 4221, and is located in the end area of ​​the first cooling chamber 3.

[0089] The air outlet of the cooling fan 33 is horizontally oriented towards the compressor 32 and located between the projections of the first air outlet 4211 and the second air outlet 4221. The overall airflow direction within the first cooling chamber 3 is from the first air outlet 4211 towards the second air outlet 4221. Therefore, the cooling fan 33 is positioned on the airflow path, ensuring that part of the airflow blown into the first cooling chamber 3 from the first air outlet 4211 and the second air outlet 4221 is used to cool the compressor 32, while another part serves as the source of cold air for the cooling fan 33, allowing some airflow to be drawn in by the cooling fan 33 and blown to the compressor 32. The combined action of the three fans further enhances the cooling effect on the compressor 32 and the first condenser pipe 31. Simultaneously, the air outlets of the three fans are positioned at different diagonal points within the first cooling chamber 3, not only enveloping the compressor 32 and improving the contact effect between the cooling airflow and the compressor 32, but also making the airflow direction within the first cooling chamber 3 more consistent, improving airflow efficiency, and thus enhancing cooling efficiency.

[0090] As a preferred option, such as Figure 10 As shown, there are multiple heat dissipation fins 321, and a heat dissipation channel is formed between two adjacent heat dissipation fins 321. The extension direction of the heat dissipation channel is parallel to the axis of the air outlet of the cooling fan 33.

[0091] Specifically, with Figure 10 Taking the perspective shown as an example, the projection of the first air outlet 4211 is located in the upper left corner of the first cooling cavity 3, the projection of the second air outlet 4221 is located in the lower right corner of the first cooling cavity 3, the cooling fan 33 is located in the lower left corner of the first cooling cavity 3, and the first air vent 34 is located on the right edge of the first cooling cavity 3 along the first direction.

[0092] Preferably, nitrogen and oxygen are separated in the oxygen generating module 7. Oxygen is delivered to the oxygen storage tank 72, while nitrogen, as waste gas, is delivered by the oxygen generating module 7 to the silencing component. The silencing component is located in the first cooling chamber 3 and has a waste gas outlet facing the air intake of the cooling fan 33. This allows the nitrogen to be discharged through the waste gas outlet to the air intake of the cooling fan 33 after being silenced by the silencing component, serving as part of the airflow source for the cooling fan 33. This airflow mixes with the cooling airflow entering the first cooling chamber 3 from the second cooling chamber 4 above, forming a mixed airflow for cooling the compressor 32.

[0093] As a preferred embodiment of this application, such as Figure 5 , Figure 6 As shown, the inner shell 2 also has an air passage 5 located below the first cooling chamber 3. The bottom wall of the first cooling chamber 3 is provided with a first air passage 34 that connects to the air passage 5. The bottom of the inner shell 2 is provided with a base 9. The base 9 includes an upper base 91 and a lower base 92 that are interlocked with each other. The upper base 91 and the lower base 92 cooperate to form the air passage 5. The upper base 91 is provided with a mounting groove 911 for installing the compressor 32.

[0094] Specifically, the upper base 91 and the lower base 92 can be fixedly connected by screws, clips, etc., to form an air passage chamber 5 between them. The compressor 32 is fixed in the mounting groove 911 by a mounting bracket. The mounting groove 911 has a downward (facing the inside of the air passage chamber 5) protruding structure, so that the airflow in the air passage chamber 5 can pass over the protruding part of the mounting groove 911 in the air passage chamber 5, thereby providing air cooling for the mounting groove 911 and the compressor 32 inside it.

[0095] In a preferred embodiment, such as Figure 5 , Figure 6 , Figure 8 , Figure 9 As shown, a partition 8 is provided between the first cooling chamber 3 and the second cooling chamber 4 to separate the two. The partition 8 has a connecting port 81. The cooling fan 42 is fixed to the partition 8 and the air outlet of the cooling fan 42 is connected to the connecting port 81.

[0096] Specifically, the cooling fan 42 is a centrifugal fan, whose blades draw air in along the axis and blow it out in all directions. Therefore, the cooling fan 42 is placed vertically in the second cooling chamber 4 so that its axis is horizontal. An air outlet is opened at its bottom and connects with the communication port 81 of the partition 8, so that it directly blows air into the first cooling chamber 3 below. The partition 8 not only serves as a separator between the first cooling chamber 3 and the second cooling chamber 4, but also provides a fixation for the cooling fan 42.

[0097] In a preferred embodiment of this implementation, such as Figure 8 As shown, the oxygen generator also includes a flexible mounting bracket 43, which is fixed to the partition 8. The flexible mounting bracket 43 has a fixing groove 431, and the cooling fan 42 is fixed in the fixing groove 431.

[0098] Preferably, the flexible mounting bracket 43 is made of silicone or rubber, so as to have good elasticity and good high temperature resistance.

[0099] The cooling fan 42 is fixed to the partition 8 by a flexible mounting bracket 43. On one hand, the flexible material has better shock absorption, so the flexible mounting bracket 43 can block the vibration generated by the cooling fan 42 during operation, reducing the vibration transmitted to the partition 8 and providing good shock absorption for the cooling fan 42. On the other hand, the flexible material can undergo elastic deformation when compressed, allowing the cooling fan 42 to be inserted into the fixing groove 431 of the flexible bracket through an interference fit. This makes the installation and removal of the cooling fan 42 simpler and more convenient, effectively improving assembly and disassembly efficiency compared to fixing methods such as screws. Furthermore, when the cooling fan 42 and the flexible mounting bracket 43 are in an interference fit, the deformation of the flexible mounting bracket 43 can seal the gap between them, eliminating the need for additional sealing components, simplifying the installation structure, and saving costs.

[0100] Specifically, the flexible mounting bracket 43 is provided with a fixing post, and a stop rib is provided on the outer periphery of the fixing post. The partition 8 has a fixing hole. By passing the fixing post through the fixing hole, the stop rib is located in the lower first cooling chamber 3, forming an upward stop with the partition 8, thereby fixing the flexible mounting bracket 43 to the partition 8. The flexible mounting bracket 43 is provided with an opening corresponding to the connecting port 81. The fan is inserted into the fixing groove 431 by interference fit, and the air outlet corresponds to the opening. Preferably, as follows... Figure 8 As shown, the wall of the fixing groove 431 is also provided with a slot 432, and the outer shell 1 of the cooling fan 42 is provided with a snap-fit ​​rib. Through the snap-fit ​​rib and the slot 432, the cooling fan 42 and the flexible mounting bracket 43 are locked together to prevent loosening.

[0101] Of course, in other embodiments, the cooling fan 42 can also be directly fixed to the partition 8 in other ways, such as screw connection, without the aid of a mounting bracket, and this is not limited here.

[0102] As a preferred embodiment of this application, such as Figure 3 , Figure 4 , Figure 5 , Figures 6 to 8 As shown, both the first condenser tube 31 and the second condenser tube 41 extend in a spiral shape. The compressor 32 is a scroll compressor 32. The top of the scroll compressor 32 is provided with heat dissipation fins 321. The top wall of the first cooling chamber 3 is provided with an air vent that communicates with the cooling fan 42. The heat dissipation fins 321 have a direct blowing section 322 that corresponds to the air vent. At least a portion of the downward projection of the first condenser tube 31 is located in the direct blowing section 322.

[0103] Specifically, such as Figure 7 , Figure 10As shown, the cooling fan 42 includes a first fan 421 and a second fan 422. The air outlet includes a first air outlet 4211 of the first fan 421 and a second air outlet 4221 of the second fan 422. The direct blowing part 322 is arranged at least vertically corresponding to the first air outlet 4211.

[0104] The spiral-shaped condenser tube can extend its length within a limited space, thereby increasing the time that oxygen flows within the condenser tube and improving the cooling effect on oxygen.

[0105] Specifically, such as Figures 5 to 8 As shown, the second condenser tube 41 extends spirally around a horizontal axis to form a horizontally extending air inlet channel 411. The inlet of the air inlet channel 411 corresponds to the air inlet 21, allowing the airflow entering through the air inlet 21 to flow within the air inlet channel 411 and contact the outer periphery of the second condenser tube 41 for cooling. A cooling fan 42 is positioned at the outlet of the air inlet channel 411, ensuring that the airflow, under the suction of the cooling fan 42, flows completely through the air inlet channel 411, thus achieving full and complete contact with the second condenser tube 41. Preferably, as... Figures 6 to 8 As shown, the cooling fan 42 includes a first fan 421 and a second fan 422, which are located on opposite sides of the air intake channel 411.

[0106] like Figure 6 , Figure 10 As shown, the first condenser pipe 31 extends spirally around the vertical axis. The downward projection of the air vent covers at least part of the first condenser pipe 31 and the compressor 32, so that the airflow blown out of the air vent can contact the first condenser pipe 31 and the compressor 32 at the same time. This allows the same airflow to achieve heat dissipation and cooling of the two components. On the one hand, this improves the heat dissipation efficiency, and on the other hand, it makes the layout of the first condenser pipe 31 and the compressor 32 in the first cooling chamber 3 more compact, saving space and making it easier for them to contact the cooling airflow for heat exchange.

[0107] It is understandable that, due to the spiral extension of the first condenser tube 31, the air vent cannot completely cover the first condenser tube 31, but can only cover a circumferential area of ​​the first condenser tube 31.

[0108] As a preferred embodiment of this application, such as Figure 5 , Figure 11 As shown, the inner shell 2 also has an air passage 5 located below the first cooling chamber 3 and an air outlet 6 located below the air passage 5. The bottom wall of the first cooling chamber 3 is provided with a first air passage 34 connected to the air passage 5, and the bottom wall of the air passage 5 is provided with a second air passage 51 connected to the air outlet 6. The first air passage 34 and the second air passage 51 are located on opposite sides of the air passage 5.

[0109] After the airflow enters the air passage 5 through the first air outlet 34 on one side of the air passage 5, it needs to flow laterally to the opposite side of the air passage 5 before it can enter the outlet 6 through the second air outlet 51. This lengthens the airflow path within the air passage 5 and requires the airflow to undergo at least two turns within the air passage 5, helping to reduce airflow energy and improve noise reduction. On the other hand, as... Figure 5 , Figure 11 As shown, the top wall of the air passage 5 is provided with a mounting groove 911 protruding from the inside of the air passage 5 for mounting the compressor 32. The first air passage 34 and the second air passage 51 are located on both sides of the mounting groove 911, so that when the airflow flows in the air passage 5, it needs to pass through the mounting groove 911, thereby cooling the mounting groove 911 and the compressor 32 inside it, and improving the cooling effect of the compressor 32.

[0110] Specifically, such as Figure 11 As shown, there are also multiple second air inlets 51, which are arranged in a row along the edge of the air inlet 5.

[0111] Preferably, such as Figure 12 , Figure 13 As shown, a surrounding rib 151 is provided inside the air outlet chamber 6, and the surrounding rib 151 forms a horizontally extending air collection channel 152. The outer shell 1 is provided with an exhaust port 13. The air collection channel 152 has an inlet end 1521 and an outlet end 1522. The inlet end 1521 and the second air outlet 51 have different orientations, and the outlet end 1522 is connected to the exhaust port 13.

[0112] The surrounding ribs 151 form an air-collecting channel 152 within the air outlet chamber 6. This channel collects and converges the airflow before it exits the oxygen generator, allowing the airflow to be discharged at a higher velocity and pressure, thus improving exhaust efficiency and preventing airflow accumulation within the air outlet chamber 6, which could cause poor ventilation. Simultaneously, the inlet end 1521 and the second air outlet 51 face different directions, requiring the airflow to be redirected after entering the air outlet chamber 6 before entering the air-collecting channel 152. This further extends the airflow path and enhances noise reduction.

[0113] Specifically, such as Figure 12 As shown, the second air outlet 51 is located on the top wall of the air outlet chamber 6, facing downwards. The air collection channel 152 extends horizontally, and its inlet end 1521 faces horizontally towards the front end of the oxygen generator. Specifically, the second air outlet 51 is located on one side of the transverse side of the surrounding rib 151. Figure 12 (Left side), the air collection channel 152 extends perpendicular to this direction, and the inlet end 1521 is located at one end of the length direction of the air collection channel 152 ( Figure 12 (Lower middle side). Of course, the inlet end 1521 can also be located on the side opposite to the second air outlet 51 (i.e. Figure 12 (Right side of the middle)

[0114] Furthermore, such as Figure 12 , Figure 13 As shown, the air collection channel 152 has an extension section 1523 and a flared section 1524. The width of the flared section 1524 is greater than the width of the extension section 1523. The inlet end 1521 is located in the extension section 1523, and the outlet end 1522 is located in the flared section 1524.

[0115] The extension section 1523 has a smaller width, which allows it to collect and converge the airflow within the exhaust chamber 6, causing it to flow rapidly towards the outlet end 1522. The flared section 1524, on the other hand, has a larger width, which further reduces the kinetic energy of the airflow before it is discharged, preventing a loud whistling sound and contributing to "silent exhaust." Simultaneously, the flared design of the flared section 1524 allows for a larger area of ​​the exhaust port 13, further reducing the air pressure during discharge and preventing high-pressure airflow from causing significant impact on surrounding objects of the oxygen concentrator. Preferably, the length of the extension section 1523 is greater than the length of the flared section 1524.

[0116] Specifically, such as Figure 1 , Figure 13 As shown, the outer casing 1 includes a housing 14 and a bottom shell 15 located below the housing 14. The air outlet 6 is located inside the bottom shell 15, and the exhaust port 13 is opened on the side wall of the bottom shell 15.

[0117] The first cooling chamber 3, the second cooling chamber 4, and the air outlet chamber 6 are all located inside the housing 14, arranged vertically, with adjacent chambers separated by a partition 8. The air outlet chamber 6 is located inside the bottom shell 15, making its construction simpler and more convenient. Preferably, the exhaust port 13 is provided with an exhaust grille to streamline the airflow and reduce the impact force when the airflow is discharged.

[0118] Preferably, such as Figure 1 As shown, the air inlet 12 and the exhaust outlet 13 are located on the rear side of the oxygen concentrator (the side opposite to the display panel) to achieve concealed air intake and exhaust, thereby improving the overall appearance quality of the machine.

[0119] In a preferred embodiment, such as Figure 5 , Figure 7 As shown, the inner shell 2 has a first region 17 and a second region 18 arranged horizontally inside. The first cooling chamber 3 and the second cooling chamber 4 are located in the first region 17. An oxygen generating module 7 is provided in the second region 18. The oxygen generating module 7 includes an adsorption tower assembly 71 and an oxygen storage tank 72.

[0120] The oxygen generating module 7 and the cooling module are located in two separate areas, enabling modular design and installation of each module. This allows for the easy disassembly and repair or replacement of individual modules without disassembling the other modules, saving on maintenance costs. Furthermore, the horizontal arrangement of the two areas better conforms to the shape and structure of the oxygen generator, making efficient use of the internal space and resulting in a more balanced weight distribution on both sides, thus improving overall stability.

[0121] It should be noted that this application does not limit the structure of the inner shell 2 and the outer shell 1. In one embodiment, the outer shell 1 includes a front shell and a rear shell, which are assembled to form a complete outer shell 1. Of course, the outer shell 1 can be a one-piece structure, or it can be formed by assembling more parts. Similarly, the inner shell 2 can be a complete shell wall, or it can include multiple shell walls, which are assembled to form a complete inner shell 2.

[0122] Preferably, the inner side of the inner shell 2 is also provided with sound-absorbing cotton to reduce the noise transmitted from the inside of the inner shell 2 to the outside.

[0123] like Figure 2 , Figure 15 , Figure 16 As shown, the oxygen concentrator also includes a fixed bracket 23 and a filter element 22 disposed between the outer shell 1 and the inner shell 2. The fixed bracket 23 forms an air intake buffer chamber 271. The fixed bracket 23 has an opening 27 that connects the air intake buffer chamber 271 and the air inlet 12. The filter element 22 is detachably installed on the fixed bracket 23. The filter element 22 is provided with an airflow inlet 221 that communicates with the air intake buffer chamber 271.

[0124] The fixing bracket 23 is used to fix the filter element 22 inside the oxygen concentrator. At the same time, the fixing bracket 23 also forms an air intake buffer chamber 271 upstream of the airflow inlet 221 of the filter element 22, so that the airflow entering from the air inlet 12 first enters the air intake buffer chamber 271 and then enters the filter element 22. By constructing a relatively sealed air intake buffer chamber 271, the airflow can be buffered by the large volume of the cavity. When the high-speed airflow enters the air intake buffer chamber 271 from the outlet 27, the airflow can quickly diffuse and depressurize in the air intake buffer chamber 271 because the air intake buffer chamber 271 is larger in volume than the narrow air passage, thereby quickly reducing the airflow kinetic energy and airflow velocity, and thus reducing the whistling sound generated by the high-speed airflow. On the other hand, since the air intake buffer chamber 271 is relatively sealed, the noise generated by the collision between the airflow and the chamber wall of the air intake buffer chamber 271 can be canceled out within the air intake buffer chamber 271. This not only reduces low-frequency noise but also effectively prevents noise from being transmitted outward, making it more difficult for users to hear the noise inside the oxygen concentrator from the outside, thereby improving the user experience.

[0125] In addition, the intake buffer chamber 271 is located upstream of the airflow inlet 221, which allows the airflow to converge briefly in the intake buffer chamber 271 before entering the filter element 22 through the airflow inlet 221. This makes the airflow entering the filter element 22 more uniform per unit time, and thus provides more uniform airflow to the oxygen generation module 7, improving oxygen generation efficiency.

[0126] As a preferred embodiment of this application, such as Figure 15 , Figure 16 , Figure 17 As shown, the fixed bracket 23 has an air intake side facing the inner shell 2, the through 27 is opened on the air intake side, and there is an air intake gap 28 between the air intake side and the inner shell 2.

[0127] After entering the space between the outer shell 1 and the inner shell 2 through the air inlet 12, outside air cannot directly enter the intake buffer chamber 271. Instead, it needs to bypass the fixed bracket 23 and enter the intake buffer chamber 271 from the air intake side of the fixed bracket 23 (the side opposite to the outer shell 1). This increases the tortuosity of the air path between the air inlet 12 and the intake buffer chamber 271, causing the airflow to turn multiple times during its flow, further reducing the kinetic energy of the airflow and improving the noise reduction effect. At the same time, it allows the airflow to enter the intake buffer chamber 271 at a relatively low velocity, preventing high-speed airflow from rushing into the cavity and producing a sharp whistling sound.

[0128] Furthermore, such as Figure 16 , Figure 17 As shown, the fixed bracket 23 also has a shielding side facing the outer casing 1. The shielding side is provided with an air-blocking part 231, which shields the air intake buffer chamber 271 so that the airflow entering from the air inlet 12 bypasses the fixed bracket 23 and flows to the air intake side.

[0129] Specifically, such as Figure 16 , Figure 17 As shown, the air baffle 231 forms the cavity wall of the air intake buffer chamber 271 facing the outer shell 1. Due to the obstruction of the air baffle 231, the airflow needs to bypass the air baffle 231 from the lower side or the left and right sides before it can reach the air intake gap 28 on the air intake side.

[0130] Furthermore, such as Figure 16 As shown, the outer shell 1 is provided with a mating rib 114 extending toward the inner shell 2. The mating rib 114 and the fixed bracket 23 cooperate to form an air intake channel 25 to restrict the airflow within the air intake channel 25 and prevent the airflow from escaping between the inner shell 2 and the outer shell 1, thus avoiding waste.

[0131] Specifically, such as Figure 16As shown, the mating part engages with the top of the air-blocking part 231 to seal the top of the air-blocking part 231, preventing airflow from entering the intake buffer chamber 271 from above the air-blocking part 231, thus further limiting the intake path. Preferably, as... Figure 16 , Figure 17 As shown, the fixed bracket 23 has an air-relief area 26 below the air intake buffer chamber 271 that connects to the air intake gap 28.

[0132] Specifically, such as Figure 16 As shown, when the airflow enters the space between the inner shell 2 and the outer shell 1 from the air inlet 12, part of the airflow is confined within the air intake channel 25. Then the airflow flows to the air-relief area 26 below the air intake buffer chamber 271, passes through the air-relief area 26, bypasses the fixed bracket 23, and reaches the air intake gap 28 on the air intake side. It then enters the air intake buffer chamber 271 through the outlet 27 and enters the interior of the filter element 22 through the airflow inlet 221 of the filter element 22.

[0133] like Figure 16 As shown, the bottom wall of the filter element 22 is also provided with an air outlet 222, and there are two air inlets 221 located on both sides of the air inlet 222.

[0134] In a preferred embodiment, such as Figure 16 , Figure 19 As shown, the top of the outer casing 1 has an installation port, through which the filter element 22 can be inserted into the fixing bracket 23 for fixing or removed.

[0135] In this embodiment, the user can install or remove the filter element 22 by plugging and unplugging it. For example... Figure 16 , Figure 19 As shown, the intake buffer chamber 271 has a top opening, allowing the user to insert the filter element 22 into the housing 1 through the mounting port, thus sealing the top opening of the intake buffer chamber 271 with the filter element 22 and the fixing bracket 23. After the filter element 22 is installed, a portion of it is exposed outside the housing 1 for the user to grip and easily remove.

[0136] Specifically, such as Figure 19 As shown, the top wall of the outer casing 1 is provided with a recessed platform 115, and the mounting port is located inside the platform 115 to reduce the distance between the mounting port and the fixed bracket 23, making it easier for the user to insert and remove the device. At the same time, it also prevents the filter element 22 from protruding from the outer casing 1, which helps to reduce the overall size of the device.

[0137] Preferably, such as Figure 19As shown, the oxygen concentrator also includes a decorative cover 113, which is movable relative to the outer casing 1 to open or close the recessed portion 115, thus achieving a concealed design for the filter element 22. This embodiment does not limit the assembly method of the decorative cover 113 and the outer casing 1. For example, one end can be rotatably connected to the outer casing 1, allowing the decorative cover 113 to rotate around the connection point to open or close. Alternatively, the decorative cover 113 can be detachably connected to the outer casing 1, allowing the user to remove the decorative cover 113, fully opening the recessed portion 115 for inserting or removing the filter element 22.

[0138] Preferably, such as Figure 16 As shown, the fixing bracket 23 is fixed to the inner shell 2. Of course, the fixing bracket 23 can also be fixed to the outer shell 1, or clamped and fixed by the outer shell 1 and the inner shell 2. This is not limited here.

[0139] As a preferred embodiment of this application, such as Figure 15 , Figure 16 , Figure 18 As shown, an intake silencer 24 is provided inside the inner shell 2. The intake silencer 24 has a silencer inlet 241 and a silencer outlet 242. The filter 22 also has an airflow outlet 222. The airflow outlet 222 is connected to the silencer inlet 241, and the silencer outlet 242 is connected to the compressor assembly.

[0140] After the airflow passes through the filter element 22, it first passes through the intake silencer element 24 before reaching the compressor for compression. This utilizes the intake buffer chamber 271 and the intake silencer element 24 to achieve a two-stage intake noise reduction effect. The air undergoes two rounds of noise reduction before reaching the compressor, significantly reducing noise while maintaining intake efficiency and improving the user experience. Simultaneously, the filter element 22 and the intake silencer element 24 are connected by a pipeline. When airflow flows within the pipeline, noise is more easily generated. Therefore, the intake silencer element 24 is installed downstream of the pipeline to further reduce noise from the airflow exiting the pipeline, preventing further noise amplification.

[0141] This embodiment does not limit the structure of the intake muffler 24. In a preferred embodiment, such as... Figure 18 As shown, the intake muffler 24 has a first muffler 243, a second muffler 244 and a third muffler 245 inside. The first muffler 243 is connected to the muffler inlet 241 and the third muffler 245 is connected to the muffler outlet 242, so that the airflow passes through the first muffler 243, the second muffler 244 and the third muffler 245 in sequence. The volume of the third muffler 245 is larger than the volume of the second muffler 244.

[0142] Furthermore, such as Figure 18As shown, the intake muffler 24 has a first connecting pipe 246 and a second connecting pipe 247 inside. The first connecting pipe 246 extends from the first muffler cavity 243 into the second muffler cavity 244 to connect the two. The second connecting pipe 247 extends from the second muffler cavity 244 into the third muffler cavity 245. The length of the first connecting pipe 246 in the first muffler cavity 243 is less than its length in the second muffler cavity 244, and the length of the second connecting pipe 247 in the second muffler cavity 244 is greater than its length in the third muffler cavity 245.

[0143] In a preferred embodiment, such as Figure 21 As shown, the oxygen generation module 7 includes an adsorption tower assembly 71 and an oxygen storage tank 72. The adsorption tower assembly 71 includes a first adsorption tower 711 and a second adsorption tower 712 arranged in parallel. The oxygen storage tank 72 is fixed to one side of the adsorption tower assembly 71. The first adsorption tower 711 and the second adsorption tower 712 are provided with oxygen outlet connectors 73. The oxygen storage tank 72 is provided with an oxygen inlet connector 74. The oxygen inlet connector 74 and the oxygen outlet connector 73 are plugged into each other to make the interior of the adsorption tower assembly 71 communicate with the interior of the oxygen storage tank 72.

[0144] During the oxygen production process, the two adsorption towers work alternately to continuously produce oxygen. Both the first adsorption tower 711 and the second adsorption tower 712 are columnar structures and are vertically placed inside the inner shell 2 of the oxygen generator.

[0145] like Figure 20 , Figure 21 , Figure 22 As shown, in one embodiment, the oxygen inlet connector 74 is located at the lower end of the oxygen storage tank 72, and the oxygen outlet connector 73 is located at the lower end of the adsorption tower assembly 71. The two are basically flush and horizontally connected.

[0146] The first adsorption tower 711 and the second adsorption tower 712 of the adsorption tower assembly 71 are arranged side by side, and the oxygen storage tank 72 is fixed to the horizontal side of the adsorption tower assembly 71. This design firstly achieves the integrated design of the adsorption tower assembly 71 and the oxygen storage tank 72, allowing them to be fixed into a single component in advance, thereby realizing the modular design of the oxygen generation module 7. This not only allows for simultaneous installation of both components during assembly, simplifying the assembly process, but also reduces the use of piping and lowers noise. Secondly, the oxygen storage tank 72 is located on the horizontal side of the adsorption tower assembly 71, i.e., on the outside of the adsorption tower assembly 71, allowing the first adsorption tower 711 and the second adsorption tower 712 to be arranged adjacent to each other without increasing the distance between the two adsorption towers. This significantly reduces the width or depth of the oxygen generation module and the oxygen generator, achieving a more compact and slimmer body design, which is crucial for the industrial design and space competitiveness of home or portable oxygen generators. Meanwhile, the outer layout places the two adsorption towers on the same side of the oxygen storage tank 72, meaning the vibration source is located on one side of the oxygen storage tank 72. This avoids the situation where vibrations from both sides act on the oxygen storage tank 72 simultaneously, which would lead to increased vibration. The vibration from the adsorption tower assembly 71 can be isolated by an independent damping design (such as rubber pads), which can significantly reduce the noise generated by vibration.

[0147] The oxygen storage tank 72 is located at the edge of the adsorption tower assembly 71, making it less likely that the adsorption tower assembly 71 will obstruct the airflow around the oxygen storage tank 72. This allows the oxygen storage tank 72 to more easily contact the flowing air, thereby increasing the heat dissipation area of ​​the oxygen storage tank 72, improving the heat dissipation effect, and preventing heat accumulation in the oxygen storage tank 72. Since the oxygen storage tank 72 is located on the outside of the adsorption tower assembly 71, when inspecting or replacing the adsorption tower assembly 71 or the oxygen storage tank 72, only the corresponding parts need to be disassembled, without disassembling other core components.

[0148] Furthermore, in this application, the oxygen inlet connector 74 of the oxygen storage tank 72 and the oxygen outlet connector 73 of the adsorption tower assembly 71 are connected by plugging in, realizing direct connection using a plug. There is no pipeline design between the two connectors, which can avoid the situation where noise is generated or amplified due to the presence of pipelines. This minimizes the noise during the operation of the oxygen generator, greatly improves the noise reduction effect of the whole machine, and enhances the user experience.

[0149] Specifically, such as Figure 21 As shown, both the first adsorption tower 711 and the second adsorption tower 712 are equipped with oxygen outlet connectors 73, and there are two oxygen inlet connectors 74 that are plugged into the two oxygen outlet connectors 73 in a one-to-one correspondence.

[0150] like Figure 21 As shown, at least a portion of the oxygen inlet connector 74 and the oxygen outlet connector 73 extend along a first direction so that the oxygen inlet connector 74 and the oxygen outlet connector 73 are plugged into each other along the first direction, which is perpendicular to the height direction of the adsorption tower assembly 71.

[0151] Specifically, such as Figure 21 As shown, both the oxygen inlet connector 74 and the oxygen outlet connector 73 are L-shaped structures. One end connects to the interface at the end of the oxygen storage tank 72 and the adsorption tower assembly 71, while the other end extends horizontally for insertion.

[0152] The insertion direction of the oxygen inlet connector 74 and the oxygen outlet connector 73 is consistent with the relative position of the oxygen storage tank 72 and the adsorption tower assembly 71. During assembly, the installation and connection of the oxygen storage tank 72 and the adsorption tower assembly 71 can be completed simultaneously, simplifying the assembly steps and improving assembly efficiency. At the same time, the insertion and connection of the oxygen inlet connector 74 and the oxygen outlet connector 73 can also play a role in fixing the installation of the oxygen storage tank 72 and the adsorption tower assembly 71, improving the assembly stability of the two. Furthermore, the insertion and connection along the first direction can effectively shorten the distance between the two pairs of connectors, allowing the two pairs of connectors to be directly inserted to complete the connection without the need for pipeline connection, thereby saving costs and reducing noise by eliminating the use of pipelines.

[0153] As a preferred embodiment of this application, such as Figure 21 As shown, the adsorption tower assembly 71 also includes a first end cap 713, a second end cap 714, and a third end cap 715. The first end cap 713 is fixed to one end of the adsorption tower assembly 71 to close the first adsorption tower 711 and the second adsorption tower 712. The second end cap 714 and the third end cap 715 are independent of each other and fixed to the other end of the adsorption tower assembly 71. The second end cap 714 closes the first adsorption tower 711, and the third end cap 715 closes the second adsorption tower 712. The oxygen outlet connector 73 is disposed on the second end cap 714 and the third end cap 715.

[0154] The first adsorption tower 711 and the second adsorption tower 712 are fixed and sealed together at one end along their length by a first end cap 713, and at the other end by a second end cap 714 and a third end cap 715 respectively. That is, the first adsorption tower 711 and the second adsorption tower 712 are fixed as one unit at one end and separated at the other end. The outer shells of the first adsorption tower 711 and the second adsorption tower 712 are usually made of metal, while the first end cap 713, the second end cap 714, and the third end cap 715 are made of plastic. During the oxygen production process, the heat of the adsorption tower assembly 71 is transferred to the end caps. Since the two adsorption towers work alternately, there will be a situation where one adsorption tower is at high pressure and the other is at low pressure, resulting in a pressure difference between them. The plastic end caps themselves have warping and strength issues, so the deformation (tolerance) will accumulate from the first end cap 713 end to the other end. Therefore, the tolerance will eventually fall at the second end cap 714 and the third end cap 715 end, where the two adsorption towers are free, which can reduce the stress on the end caps. To avoid fixing both ends of the two adsorption towers as one piece, the accumulated tolerances at one end can cause warping of the plastic parts, resulting in differences in the sealing of the two adsorption towers at that end. In addition, material aging issues can lead to air leakage over time.

[0155] Preferably, such as Figure 21 As shown, oxygen outlet connectors 73 are respectively installed on the second end cap 714 and the third end cap 715.

[0156] Preferably, such as Figure 22 As shown, one of the oxygen outlet connector 73 and the oxygen inlet connector 74 extends into the interior of the other, so that they overlap in the axial direction, thereby improving the stability of the connection and the sealing effect. At the same time, the two connectors are locked together by a snap-fit ​​mechanism to prevent them from loosening.

[0157] In a preferred embodiment of this application, such as Figure 23 As shown, the oxygen storage tank 72 has a docking interface, and the oxygen inlet connector 74 is connected to the docking interface. A one-way valve 75 is provided at the docking interface. The one-way valve 75 includes a valve body 751 and a valve core 752 fixed to the valve body 751. The valve body 751 has a communication hole. The valve core 752 includes a diaphragm 7521 located on the side of the valve body 751 near the inside of the oxygen storage tank 72. The diaphragm 7521 can swing toward the inside of the oxygen storage tank 72 to open the communication hole and abut against the valve body 751 to close the communication hole.

[0158] By fixing the diaphragm 7521 to the valve body 751, the diaphragm 7521 remains fixed to the valve body 751 when it is deformed by the gas. This limits the deformation and posture of the diaphragm 7521 at the connection, ensuring that the diaphragm 7521 always deforms in an ideal posture. When it returns to contact with the valve body 751, it can completely seal the connecting hole, improving the sealing reliability.

[0159] Specifically, in a preferred embodiment, such as Figure 22 , Figure 23 As shown, the valve body 751 has an installation hole, and the valve core 752 also includes a valve stem fixedly connected to the diaphragm 7521. The valve stem passes through the installation hole, and a stop rib is provided on the outer periphery of the valve stem. The stop rib is located on the side of the valve body 751 away from the interior of the oxygen storage tank 72 so as to stop with the valve body 751. The connecting hole surrounds the outer periphery of the installation hole.

[0160] Preferably, the valve stem and diaphragm 7521 are integrally formed structures, both made of flexible materials (such as silicone). The valve stem is located at the center of the diaphragm 7521, with the connecting hole surrounding the valve stem. This allows airflow to flow evenly around the outer periphery of the valve stem, resulting in a more uniform pushing force on all areas of the diaphragm 7521. This makes the deformation of the diaphragm 7521 more orderly and reliable, reducing the possibility of tilting due to uneven force distribution around the diaphragm 7521.

[0161] Preferably, such as Figure 23As shown, the oxygen storage tank 72 is also provided with a limiting rib 744 inside. The limiting rib 744 is located on the side of the diaphragm 7521 facing the inside of the oxygen storage tank 72. The limiting rib 744 can cooperate with the stop of the diaphragm 7521 to limit the deformation of the diaphragm 7521.

[0162] When the diaphragm 7521 is propelled by the airflow from the connecting hole, the limiting rib 744 can also stop the diaphragm 7521, thereby limiting the amount of movement of the diaphragm 7521 and maintaining the posture of the diaphragm 7521 to prevent it from tilting. Preferably, the limiting rib 744 is located at the center of the diaphragm 7521. When the diaphragm 7521 undergoes deformation, the limiting rib 744 abuts against the central area of ​​the diaphragm 7521, preventing the central area of ​​the diaphragm 7521 from undergoing drastic deformation, while the edge of the diaphragm 7521 rolls upward to open the connecting hole.

[0163] Furthermore, such as Figure 23 As shown, the oxygen storage tank 72 also has an oxygen inlet 743 inside, a one-way valve 75 is disposed between the oxygen inlet 743 and the connecting port, and a limiting rib 744 is located on the outer periphery of the oxygen inlet 743 and is disposed at intervals along the circumference of the oxygen inlet 743, and an air passage gap is formed between two adjacent limiting ribs 744.

[0164] In a preferred embodiment, such as Figure 23 As shown, the oxygen storage tank 72 has a docking part 741, which forms a pair of interfaces. The inner wall of the docking part 741 has an expansion section and a contraction section. The inner diameter of the expansion section is larger than the inner diameter of the contraction section to form a stop step between them. The one-way valve 75 is located in the expansion section. The oxygen inlet connector 74 has a stop part 732 that extends into the expansion section. The stop part 732 and the stop step clamp and fix the one-way valve 75.

[0165] Preferably, such as Figure 23 As shown, the oxygen inlet connector 74 also includes a fastening part 731 sleeved on the outside of the mating part 741. The fastening part 731 is provided with a snap fastener 7311. The outer wall of the mating part 741 is provided with a mating groove 742. The oxygen storage tank 72 is also provided with an anti-detachment rib 76 located on the outside of the fastening part 731. The anti-detachment rib 76 blocks at least a portion of the groove of the mating groove 742 to restrict the snap fastener 7311 within the mating groove 742. The anti-detachment rib 76 can elastically deform along the insertion direction of the fastening part 731 to avoid the snap fastener 7311.

[0166] The fastening part 43 is secured by the snap-fit ​​buckle 7311 engaging with the mating groove 742 of the docking part 741, thus fixing and connecting the oxygen inlet connector 74 and the oxygen storage tank 72, and also securing the one-way valve 75 inside the oxygen storage tank 72. The snap-fit ​​and groove engagement method makes installation and disassembly simpler and more convenient. Furthermore, when the snap-fit ​​buckle 7311 extends into the mating groove 742 to complete the engagement, the anti-loosening rib 76 blocks at least a portion of the groove opening of the mating groove 742, thereby confining the snap-fit ​​buckle 7311 within the mating groove 742, preventing loosening and improving the connection stability between the oxygen inlet connector 74 and the oxygen storage tank 72. During the insertion of the fastening part 731 and the mating part 741, the snap fastener 7311 can interfere with the anti-detachment rib position 76 and push the anti-detachment rib position 76 to undergo elastic deformation to avoid it, so that the snap fastener 7311 can smoothly engage with the mating groove 742, improving the smoothness of installation and reducing the feeling of jamming.

[0167] Specifically, such as Figure 23 As shown, the anti-detachment rib position 76 is horizontally set. The end away from the mating groove 742 is the fixed end, and the end close to the mating groove 742 is the free end. The free end is located on the path of the snap fastener 7311 during the insertion of the fastening part 731 and the mating part 741. During the insertion of the fastening part 731 and the mating part 741, the snap fastener 7311 gradually approaches the free end and pushes against the free end, causing the free end to swing upward and avoid the snap fastener 7311. When the snap fastener 7311 extends into the mating groove 742, the free end loses the push of the snap fastener 7311 and swings downward to reset, thus being located on the outside of the snap fastener 7311 (the side away from the mating groove 742), forming a stop for the snap fastener 7311 and preventing it from coming out of the mating groove 742.

[0168] As a preferred embodiment, such as Figure 21 As shown, the oxygen outlet connector 73 or the oxygen inlet connector 74 has a purge channel 77 that connects the interior of the first adsorption tower 711 and the second adsorption tower 712. A flow limiting element is provided in the purge channel 77 to limit the flow rate in the purge channel 77.

[0169] When one of the first adsorption tower 711 or the second adsorption tower 712 is operating, most of the separated oxygen enters the oxygen storage tank 72 through the oxygen outlet connector 73 and the oxygen inlet connector 74. A small portion of the oxygen enters the other adsorption tower through the purge channel 77 to flush the molecular sieves inside the adsorption tower and pre-increase the gas pressure inside the adsorption tower, thereby enabling rapid oxygen production. This ensures that the separated oxygen not only enters the oxygen storage tank 72 for user use but also flushes the other adsorption tower, improving utilization and reducing oxygen waste.

[0170] In a preferred embodiment, such as Figure 23As shown, the oxygen storage tank 72 has an oxygen inlet 743, and the edge of the oxygen inlet 743 extends outward toward the inside of the oxygen storage tank 72 to form a diffusion slope.

[0171] The edge of the oxygen inlet 743 is a diffuser slope, meaning the side of the oxygen inlet 743 facing the inside of the oxygen storage tank 72 is a flared opening. When oxygen enters the oxygen storage tank 72 from the oxygen inlet 743, due to airflow adhesion, the airflow will flow along the diffuser slope and diffuse inside the oxygen storage tank 72, making the airflow entering the oxygen storage tank 72 smoother, thus achieving a noise reduction effect and preventing high-speed oxygen from directly impacting the internal cavity of the oxygen storage tank 72 and causing a violent whistling sound. The diffuser slope can also be a curved surface; this is not limited here.

[0172] Furthermore, such as Figure 22 , Figure 24 As shown, the oxygen storage tank 72 has a baffle 726 inside, which divides the interior of the oxygen storage tank 72 into an oxygen outlet chamber 724 and an oxygen inlet chamber 723 located on both sides of the oxygen outlet chamber 724. The oxygen inlet 743 is connected to the oxygen inlet chamber 723. The oxygen storage tank 72 also has an outlet that is connected to the oxygen outlet chamber 724. The baffle 726 has a passage 725 that connects the oxygen inlet chamber 723 and the oxygen outlet chamber 724.

[0173] High-speed flowing oxygen enters the oxygen inlet chamber 723, where it first briefly converges to stabilize the pressure, and then enters the middle oxygen outlet chamber 724 through the outlet 725. This design gives the oxygen storage tank 72 a pressure stabilization and noise reduction effect.

[0174] This application does not limit the structure of the oxygen storage tank 72. In one embodiment, the oxygen storage tank 72 is a one-piece structure. In another embodiment, such as... Figure 21 , Figure 24 As shown, the oxygen storage tank 72 includes an upper shell 722 and a lower shell 721, which are joined together to form the oxygen storage tank 72. Baffles 726 are respectively installed inside the upper shell 722 and the lower shell 721, and each baffle 726 has a notch or groove. When the two shells are joined together, they form a passage 725. An oxygen inlet 743 is located in the lower shell 721, and an outlet is located in the upper shell 722.

[0175] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0176] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0177] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. An oxygen concentrator, comprising a shell and an inner shell located inside the shell, wherein the shell has an air inlet and the inner shell has an air inlet, characterized in that, The inner shell has a first cooling chamber and a second cooling chamber located above the first cooling chamber. The first cooling chamber is equipped with a compressor and a first condenser pipe connected to the air outlet of the compressor. The second cooling chamber is equipped with a second condenser pipe and a cooling fan. The second condenser pipe is connected to the first condenser pipe and is located in the air intake path of the cooling fan. The air outlet of the cooling fan is connected to the first cooling chamber, so that the first condenser pipe is located in the air outlet path of the cooling fan. Cooling air flows through the air inlet to the air intake port, enters the air intake path, and is discharged through the air outlet path.

2. The oxygen generator according to claim 1, characterized in that, The compressor is a scroll compressor, and the top of the scroll compressor is provided with heat dissipation fins, with the air outlet located in the middle region of the heat dissipation fins.

3. The oxygen generator according to claim 2, characterized in that, The inner shell also has an air passage located below the first cooling chamber. The bottom wall of the first cooling chamber has a first air passage opening that communicates with the air passage opening. The cooling fan includes a first fan and a second fan. The first fan has a first air outlet, and the downward projection of the first air outlet is located on the compressor. The second fan has a second air outlet, and the downward projection of the second air outlet covers at least a portion of the area of ​​the first air passage opening.

4. The oxygen generator according to claim 3, characterized in that, The downward projection positions of the first air outlet and the downward projection positions of the second air outlet are located in the diagonal regions of the first cooling cavity, respectively.

5. The oxygen generator according to claim 4, characterized in that, A cooling fan is also provided on the horizontal side of the compressor. The air outlet of the cooling fan faces the compressor. The cooling fan is located between the downward projections of the first air outlet and the second air outlet, and is located in the end region of the first cooling chamber.

6. The oxygen generator according to claim 1, characterized in that, The inner shell also has an air passage chamber located below the first cooling chamber. The bottom wall of the first cooling chamber has a first air passage port that communicates with the air passage chamber. The bottom of the inner shell is provided with a base, which includes an upper base and a lower base that are interlocked with each other. The upper base and the lower base cooperate to form the air passage chamber. The upper base is provided with a mounting groove for installing the compressor.

7. The oxygen generator according to claim 1, characterized in that, A partition is provided between the first cooling chamber and the second cooling chamber to separate them. The partition has a communication port. The cooling fan is fixed to the partition and the air outlet of the cooling fan is connected to the communication port.

8. The oxygen generator according to claim 7, characterized in that, The oxygen generator also includes a flexible mounting bracket, which is fixed to the partition. The flexible mounting bracket has a fixing groove, and the cooling fan is fixed in the fixing groove.

9. The oxygen generator according to claim 1, characterized in that, Both the first condenser tube and the second condenser tube extend in a spiral shape. The compressor is a scroll compressor. The top of the scroll compressor is provided with heat dissipation fins. The top wall of the first cooling chamber is provided with an air vent that communicates with the cooling fan. The heat dissipation fins have a direct blowing section that corresponds vertically to the air vent. At least a portion of the downward projection of the first condenser tube is located in the direct blowing section.

10. The oxygen generator according to claim 1, characterized in that, The inner shell also has an air passage chamber located below the first cooling chamber and an air outlet chamber located below the air passage chamber. The bottom wall of the first cooling chamber has a first air passage opening that communicates with the air passage chamber, and the bottom wall of the air passage chamber has a second air passage opening that communicates with the air outlet chamber. The first air passage opening and the second air passage opening are located on opposite sides of the air passage chamber.

11. The oxygen generator according to claim 10, characterized in that, The air outlet cavity is provided with surrounding ribs, which form a horizontally extending air collection channel. The outer shell is provided with an exhaust port. The air collection channel has an inlet end and an outlet end. The inlet end and the second air outlet face different directions. The outlet end is connected to the exhaust port.

12. The oxygen generator according to claim 11, characterized in that, The air collection channel has an extension section and a flared section. The width of the flared section is greater than the width of the extension section. The inlet end is located in the extension section, and the outlet end is located in the flared section.

13. The oxygen generator according to claim 11, characterized in that, The outer casing includes a housing and a bottom shell located below the housing. The air outlet is located inside the bottom shell, and the exhaust port is opened on the side wall of the bottom shell.

14. The oxygen generator according to claim 1, characterized in that, The inner shell has a first region and a second region arranged horizontally inside. The first cooling chamber and the second cooling chamber are located in the first region. An oxygen generating module is provided in the second region. The oxygen generating module includes an adsorption tower assembly and an oxygen storage tank.

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