Oxygen generator without built-in battery

Abstract

This utility model relates to the field of ventilation therapy equipment and discloses an oxygen concentrator that does not require an internal battery. It includes: an adsorption tower with an oxygen outlet; an oxygen tank configured to receive and store oxygen produced by the adsorption tower from the outlet; a control component including a pulse valve located at the oxygen supply end of the oxygen tank, the pulse valve being controlled to open during the user's inhalation and close during exhalation to form a pulsed oxygen supply; and a power connection component configured to connect to an external power source, which serves as the sole power source for the oxygen concentrator. The pulse valve design prevents oxygen waste caused by outputting oxygen during the user's exhalation. Compared to oxygen concentrators that provide continuous oxygen supply, this battery-free oxygen concentrator is smaller and more convenient, effectively mitigating the inconvenience caused by the large size of traditional oxygen concentrators, while maintaining the same amount of oxygen inhaled by the user.

Description

Technical Field

[0001] This utility model relates to ventilation therapy equipment, specifically to an oxygen generator that does not require a built-in battery. Background Technology

[0002] With the improvement of living standards and the advancement of medical technology, people are paying more and more attention to health. This is especially true for those suffering from chronic respiratory diseases, such as COPD and asthma, for whom a continuous supply of oxygen is crucial. Oxygen concentrators, as a novel medical device, provide convenience for people's daily oxygen therapy and health maintenance.

[0003] Current oxygen concentrators are all continuous oxygen supply systems. After starting up, they continuously output oxygen to the user, even when the user is not inhaling. This results in almost half of the oxygen produced by the concentrator being wasted. In other words, the amount of effective oxygen produced by the concentrator is less than the amount of oxygen the concentrator itself can produce. The amount of oxygen produced is directly proportional to the number of molecular sieves and the volume of the compressor, which leads to the large size of the concentrator and causes many inconveniences for the user. Utility Model Content

[0004] The purpose of this invention is to overcome the problem of large size of oxygen concentrators caused by continuous oxygen supply in the existing technology, and to provide an oxygen concentrator that does not require built-in batteries. It can form pulse oxygen supply, supplying oxygen when the user inhales and stopping oxygen supply when the user exhales, effectively saving oxygen and thus reducing the size of the oxygen concentrator.

[0005] To achieve the above objectives, this utility model provides an oxygen concentrator that does not require a built-in battery, comprising:

[0006] The adsorption tower has an oxygen outlet.

[0007] An oxygen tank is configured to receive and store oxygen produced by an adsorption tower from an oxygen outlet.

[0008] The control components include a pulse valve located at the oxygen supply end of the oxygen cylinder, the pulse valve being controlled to open during the user's inhalation and close during the user's exhalation to form a pulsed oxygen supply; and

[0009] The power connection component is configured to be able to connect to an external power source, which becomes the sole power source for the oxygen concentrator.

[0010] Preferably, the control component further includes a breathing state sensor, which is configured to detect inhalation and exhalation states, and the pulse valve switches between an open state and a closed state based on the breathing state signal detected by the breathing state sensor.

[0011] Preferably, the oxygen tank has a slot for installing a pulse valve, which is installed in the slot and can control the opening and closing of the oxygen supply path of the oxygen tank.

[0012] Preferably, the power connection assembly includes a connection socket, a connection plug, a power cord, and a power plug that are electrically connected in sequence. The connection socket is formed on the oxygen concentrator main unit, and the connection plug is detachably connected to the connection socket.

[0013] Preferably, the oxygen generator further includes an outer shell with an internal installation chamber, an adsorption tower mounting frame is provided in the installation chamber, the adsorption tower mounting frame has an adsorption tower compartment for installing the adsorption tower and a first disassembly port communicating with the adsorption tower compartment, the outer shell has a second disassembly port communicating with the first disassembly port, the adsorption tower compartment, the first disassembly port and the second disassembly port together form the disassembly path of the adsorption tower, and the outer shell has an adsorption tower compartment cover that is detachably connected to the second disassembly port.

[0014] Preferably, the adsorption tower is inserted into the adsorption tower mounting frame, and the adsorption tower chamber gradually narrows and extends along the insertion direction of the adsorption tower.

[0015] Preferably, when the adsorption tower is placed inside the adsorption tower chamber, part of the wall surface of the adsorption tower is in contact with the side wall of the adsorption tower mounting frame.

[0016] Preferably, the adsorption tower has an air inlet connector and an installation hole is formed on the adsorption tower mounting frame. When the adsorption tower is installed in the adsorption tower chamber, the air inlet connector is inserted and sealed to the installation hole.

[0017] Preferably, the adsorption tower mounting frame includes a main frame and an isolation frame fixed on the main frame. The adsorption tower chamber is formed on the main frame. The oxygen generator also includes a control valve set on the isolation frame. The control valve is isolated from the air inlet connector through the isolation frame. The control valve has a first working port. The first working port is non-contactly connected to the air inlet connector to control the gas to alternately enter different molecular sieves in the adsorption tower.

[0018] Preferably, the isolation frame includes an isolation tube extending in a direction away from the main frame, an isolation plate disposed on the isolation tube, an installation hole for inserting an air inlet connector is formed inside the isolation tube, the extension length of the isolation tube is greater than or equal to the extension length of the air inlet connector, a control valve is disposed on the isolation plate and is located on opposite sides of the isolation plate from the isolation tube, so as to form a gap between the control valve and the air inlet connector, and an isolation hole coaxially connected to the isolation tube is formed on the isolation plate.

[0019] Preferably, the diameter of the isolation hole is larger than the inner diameter of the isolation tube, and the isolation plate and the isolation tube form a stepped groove at the connection point. A first sealing ring is provided in the groove to form a closed gap, and the first working port is coaxially connected to the mounting hole through the gap.

[0020] Preferably, the oxygen generator also includes a compressor connected to the adsorption tower, a cooling fan disposed above the compressor, and a main control board. The cooling fan is configured to drive the gas flow in the installation chamber, and the outer casing has an air inlet for external gas to enter the installation chamber and an air inlet for external gas to enter the compressor.

[0021] Through the above technical solution, the pulse valve switches on and off according to the user's inhalation and exhalation states. When the user is inhaling, the pulse valve opens, and oxygen from the oxygen tank is output; when the user is exhaling, the pulse valve closes, and oxygen output stops. This avoids waste caused by outputting oxygen during exhalation. Compared to oxygen concentrators that provide continuous oxygen supply, this battery-free oxygen concentrator is smaller and more convenient, effectively mitigating the inconvenience caused by the large size of traditional oxygen concentrators, while maintaining the same amount of oxygen inhaled by the user. Attached Figure Description

[0022] Figure 1 This is a perspective view of the oxygen generator of this utility model;

[0023] Figure 2 yes Figure 1 Exploded view of the adsorption tower, adsorption tower chamber cover and other components of the oxygen generator in the image;

[0024] Figure 3 yes Figure 1 A stereoscopic view from another perspective;

[0025] Figure 4 yes Figure 3 A magnified view of part A in the image;

[0026] Figure 5 yes Figure 1 Exploded view of the adsorption tower, adsorption tower mounting frame, and control valve of the oxygen generator in the image;

[0027] Figure 6 yes Figure 1 A partial sectional view of the adsorption tower, adsorption tower mounting frame, and control valve of the oxygen generator in the image.

[0028] Figure 7 yes Figure 1 A 3D view of the adsorption tower mounting frame of the oxygen generator in the image;

[0029] Figure 8 yes Figure 1 A 3D view of the adsorption tower of an oxygen generator;

[0030] Figure 9 yes Figure 1 A cross-sectional view of an oxygen concentrator, where the arrows indicate the direction of gas flow for heat dissipation within the mounting chamber;

[0031] Figure 10 yes Figure 1 A 3D view of the main control board mounting bracket of the oxygen concentrator in the image;

[0032] Figure 11 yes Figure 1 An exploded view of an oxygen concentrator in the image;

[0033] Figure 12 yes Figure 1 A 3D view of the outer casing of the oxygen concentrator after the front and rear shells have been removed;

[0034] Figure 13 yes Figure 1 Exploded view of the adsorption tower, oxygen storage tank and pulse valve of the oxygen generator in the picture;

[0035] Figure 14 yes Figure 1 Exploded view of the compressor mounting bracket and compressor of the oxygen concentrator;

[0036] Figure 15 yes Figure 14 A sectional view of the assembled components;

[0037] Figure 16 yes Figure 1 An exploded view of the outer casing of an oxygen concentrator.

[0038] Figure 17 yes Figure 1 Exploded view of the lower end cover assembly of the oxygen concentrator in the image;

[0039] Figure 18 yes Figure 17 Front view of the lower middle end cap;

[0040] Figure 19 yes Figure 1 Exploded view of the adsorption tower, adsorption tower mounting frame, and control valve of the oxygen generator in the image;

[0041] Figure 20 yes Figure 19 A sectional view in the assembled state;

[0042] Figure 21 yes Figure 20 Partial sectional view;

[0043] Figure 22 yes Figure 1 A three-dimensional view of the heat dissipation and noise reduction structure of the oxygen generator and the compressor base plate;

[0044] Figure 23 yes Figure 22 A bottom view of the first embodiment;

[0045] Figure 24 yes Figure 23 A schematic diagram showing the direction of noise flow;

[0046] Figure 25 yes Figure 22 A bottom view of the second embodiment;

[0047] Figure 26 yes Figure 22 A bottom view of the third embodiment;

[0048] Figure 27 yes Figure 22 Top view of the compressor base plate;

[0049] Figure 28 yes Figure 22 Rear view;

[0050] Figure 29 yes Figure 1 A 3D view of a Chinese oxygen concentrator;

[0051] Figure 30 yes Figure 29 The left view;

[0052] Figure 31 It is Figure 29 A 3D view of the oxygen concentrator after its outer casing has been removed;

[0053] Figure 32 yes Figure 29 A three-dimensional view of the base, first baffle, and second baffle of the outer casing of the oxygen concentrator;

[0054] Figure 33 yes Figure 29 A three-dimensional view of the adsorption tower mounting frame and adsorption tower of the oxygen generator.

[0055] Figure 34 yes Figure 33 The main view;

[0056] Figure 35 yes Figure 33 The left view;

[0057] Figure 36 yes Figure 29 A 3D view of the main control board, main control board mounting bracket, and fan of the oxygen generator;

[0058] Figure 37 yes Figure 16 Top view;

[0059] Figure 38 yes Figure 1 Exploded view of the air intake assembly and outer casing of a medium-sized oxygen concentrator;

[0060] Figure 39 yes Figure 38 A stereoscopic view from another perspective;

[0061] Figure 40 yes Figure 38 A sectional view after assembly;

[0062] Figure 41 yes Figure 38 A 3D view of the filter element of the middle air intake assembly;

[0063] Figure 42 yes Figure 1 Exploded view of the oxygen output assembly and oxygen storage tank of a Chinese oxygen concentrator

[0064] Figure 43 yes Figure 42 Cross-sectional view of the throttling component of the central oxygen outlet assembly;

[0065] Figure 44 yes Figure 42 Cross-sectional view of the flow stabilization component of the oxygen outlet assembly.

[0066] Explanation of reference numerals in the attached figures

[0067] 1-Adsorption tower; 101-Ventilation connector; 102-Second sealing ring; 103-Oxygen outlet; 104-Molecular sieve; 1041-First molecular sieve container; 1042-Second molecular sieve container; 105-Lower end cap assembly; 1051-Lower end cap; 1511-Positioning column; 1512-Purge gas channel; 1513-Purge hole; 1514-First oxygen channel; 1515-First oxygen outlet; 1516-Second oxygen channel; 15 17-Second oxygen outlet; 1518-Oxygen outlet; 1519-Second groove; 1520-Second connecting hole; 1052-Purge component; 1053-Purge sealing ring; 1054-Cover plate; 1055-Gas passage sealing gasket; 1056-Lower end cover sealing gasket; 106-Upper end cover; 1061-Upper end cover sealing gasket; 1062-Gas inlet and nitrogen outlet; 107-Bolt; 108-First connector; 109-Second connector;

[0068] 2-Outer shell; 201-First disassembly / removal port; 202-Easy disassembly groove; 203-Operating clearance; 204-Air inlet; 2041-First inlet; 2042-Second inlet; 205-Air inlet; 206-Air outlet; 207-Front shell; 208-Rear shell; 209-Base; 2091-First baffle; 2092-Second baffle; 210-Air inlet window cover; 211-Air inlet window cover; 212-Decorative top plate; 213-Top plate sealing ring; 214-Air inlet silencer hole; 215-Installation chamber; 216-Air inlet compartment; 2161-Peripheral wall; 2162-Second side wall; 2163-Sealing rib; 217-Exhaust grille; 218-Inlet grille;

[0069] 3-Adsorption tower mounting frame; 301-Main frame; 3011-Adsorption tower compartment; 3012-Second disassembly / assembly port; 3013-Side wall; 3014-Heat dissipation notch; 302-Isolation frame; 3021-Mounting hole; 3022-Isolation tube; 3023-Isolation plate; 3024-Isolation gap; 3025-Groove; 3026-First sealing ring; 3027-Side plate; 3028-Isolation hole; 303-Connecting plate; 3031-Connecting hole; 3032-Connector; 3034-Positioning hole; 304-First adapter; 305-Second adapter;

[0070] 4-Adsorption tower compartment cover; 401-Plate body; 402-Protruding buckle;

[0071] 5-Power connection assembly; 501-Power plug; 502-Connecting socket; 503-Connecting plug; 504-Power cord; 505-Anti-disengagement clip; 506-Switch;

[0072] 6-Control valve; 601-First working port; 602-Second working port; 603-Ventilation connector;

[0073] 7-Compressor mounting bracket; 701-Noise reduction chamber; 702-Cover; 7021-Opening; 703-Base plate; 7031-Airflow inlet; 7032-Positioning structure; 7033-Base plate body; 7034-Positioning groove; 704-Anti-collision rib; 705-Nitrogen exhaust silencer; 706-Limiting protrusion;

[0074] 8-Compressor; 801-Foot pads;

[0075] 9-Main control board mounting bracket; 901-Main mounting frame; 902-Air intake plate;

[0076] 10-Cooling fan; 11-Main control board;

[0077] 12-Oxygen storage tank; 121-Oxygen supply connector; 122-Slot; 123-Oxygen inlet connector; 124-Oxygen inlet connector sealing ring; 125-Inlet connector; 13-Pulse valve;

[0078] 14-Intake assembly; 141-Filter element; 1411-Sealing ring; 1412-Intake filter paper; 142-Sealing gasket; 143-Silencer chamber cover; 144-Annular protrusion; 145-Exhaust port; 146-Silencer chamber;

[0079] 15-Oxygen outlet assembly; 151-Throttling component; 152-First hose; 153-Oxygen sensor; 154-Second hose; 155-Flow stabilizing component; 156-Bacterial filter; 157-Four-way connector; 158-Pressure relief valve; 159-Respiratory status sensor; 1510-Oxygen outlet nozzle;

[0080] 16- Monitor;

[0081] 17-Heat dissipation and noise reduction structure; 171-Sound insulation guide plate; 1711-First guide cavity; 1712-Second guide cavity; 1713-Through hole; 1714-Multi-layer structure; 1715-Sound insulation cavity; 1716-First guide plate; 1717-Second guide plate; 1718-Expansion chamber; 172-Partition plate;

[0082] 18-Exhaust pipe. Detailed Implementation

[0083] In utility models, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower as shown in the accompanying drawings. "Inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0084] Reference Figures 1 to 16 As shown, this utility model provides an oxygen generator, comprising: an adsorption tower 1, with at least one first connector 108 and at least one second connector 109 respectively at its top and bottom; an adsorption tower chamber 3011, into which the adsorption tower 1 is detachably installed; a control valve 6, with at least one ventilation connector 603; and an oxygen storage tank 12, with at least one air inlet connector 125. When the adsorption tower 1 is installed in the adsorption tower chamber 3011, the first connector 108 is sealed and ventilatedly connected to the ventilation connector 603, and the second connector 109 is sealed and ventilatedly connected to the air inlet connector 125. When the adsorption tower 1 is separated from the adsorption tower chamber 3011, the first connector 108 is disconnected from the ventilation connector 603, and the second connector 109 is disconnected from the air inlet connector 125.

[0085] Additionally, the oxygen generator also includes a first adapter 304 for connecting the first connector 108 and the ventilation connector 603. The first connector 108 includes a ventilation joint 101 formed on the adsorption tower 1. The first adapter 304 includes a mounting hole 3021 for the ventilation joint 101 to be inserted into. The ventilation connector 603 includes a first working port 601 formed on the control valve 6 and communicating with the mounting hole 3021. The second connector 109 includes an oxygen outlet 103 formed on the adsorption tower 1. The second adapter 305 includes a connector 3032 for insertion into the oxygen outlet 103. The air inlet connector 125 includes an oxygen inlet formed on the oxygen storage tank 12 and connected to the connector 3032. The adsorption tower 1 has a ventilation hole, and the ventilation joint 101 extends coaxially along the ventilation hole.

[0086] When the adsorption tower 1 installed in the adsorption tower compartment 3011 needs to be replaced, the adsorption tower 1 is removed from the adsorption tower mounting frame 3, and then the replacement adsorption tower 1 is installed in the adsorption tower compartment 3011. The vent of the adsorption tower 1 is connected to the first working port 601 of the control valve 6 through the mounting hole 3021 on the adsorption tower mounting frame 3, and the oxygen outlet 103 is connected to the oxygen storage tank 12 through the connection hole 3031 on the adsorption tower mounting frame 3. This ensures that the installed adsorption tower 1 forms a connected gas path with the control valve 6 and the oxygen storage tank 12, without affecting the normal operation of the adsorption tower 1.

[0087] Since the molecular sieve 104 inside the adsorption tower 1 needs to first absorb gas before producing oxygen, the adsorption tower 1 needs to be equipped with a vent and an oxygen outlet 103. In this oxygen generator's detachable adsorption tower 1 design, the connection between the vent connector 101 and the control valve 6, and the connection between the oxygen outlet 103 and the oxygen storage tank 12, are key considerations. In this design, the control valve 6 is fixed to the adsorption tower mounting bracket 3, and the first working port 601 formed on the control valve 6 is positioned coaxially with the mounting hole 3021 to ensure communication between them. The axial directions of the vent and oxygen outlet 103 of the adsorption tower 1, the mounting hole 3021 and the connection hole 3031 of the adsorption tower mounting bracket 3, the first working port 601 of the control valve 6, and the oxygen inlet of the oxygen storage tank 12 are all the same as the direction of movement of the adsorption tower 1 during disassembly and assembly. Figure 5 The vertical direction is such that when the vent connector 101 of the adsorption tower 1 is inserted into the mounting hole 3021, the vent can be connected to the first working port 601 of the control valve 6, so that gas can be input into the molecular sieve 104 inside the adsorption tower 1 through the control valve 6. When the oxygen outlet hole 103 of the adsorption tower 1 is connected to the connection hole 3031, it can be connected to the oxygen inlet of the oxygen storage tank 12. By considering the connection of the gas path between the vent hole and the oxygen outlet hole 103 of the adsorption tower 1 during the disassembly and assembly process, this scheme is designed to ensure that the adsorption tower 1 can be connected to the required gas path when it is installed in the adsorption tower compartment 3011, so that the adsorption tower 1 can operate normally and fully guarantee the disassembly of the adsorption tower 1.

[0088] When adsorption tower 1 is installed into adsorption tower compartment 3011, the vent connector 101 is inserted into the mounting hole 3021, and the connector 3032 is inserted into the oxygen outlet hole 103, thus connecting the gas path of adsorption tower 1. This insertion-type connection method can improve the portability of adsorption tower 1 during disassembly and assembly, and can also play a certain guiding role during the insertion process of adsorption tower 1.

[0089] In other embodiments, specifically in the parallel gas path connecting the adsorption tower 1 to the control valve 6 and the oxygen storage tank 12, the first connector 108 is connected to the ventilation connector 603 in the form of a hole and a connector plug-in; the second connector 109 is connected to the air inlet connector 125 in the form of a hole and a connector plug-in.

[0090] Specifically, the first connector 108 includes a vent connector 101, and the vent connector 603 includes a first working port 601 formed on the control valve 6. When the adsorption tower 1 is installed in the adsorption tower compartment 3011, the vent connector 101 is inserted into the first working port 601 to form a sealed connection between the two. The second connector 109 includes an oxygen outlet 103, and the air inlet connector 125 includes an oxygen inlet formed on the oxygen storage tank 12 and an oxygen inlet connector 123 extending coaxially along the oxygen inlet. When the adsorption tower 1 is installed in the adsorption tower compartment 3011, the oxygen inlet connector 123 is inserted into the oxygen outlet 103 to form a sealed connection between the two. This plug-in sealing method makes the installation and removal of the adsorption tower 1 more convenient. When the adsorption tower 1 is installed in the adsorption tower compartment 3011, it can simultaneously form a gas path connecting the control valve 6 and the oxygen storage tank 12 without the need for additional pipeline connections.

[0091] In some embodiments, the oxygen generator further includes an adsorption tower mounting frame 3 having a main frame 301, with an adsorption tower chamber 3011, a first adapter 304, and a second adapter 305 all formed on the adsorption tower mounting frame 3. The first adapter 304 also includes an isolation frame 302 disposed on the top of the main frame 301, with a mounting hole 3021 formed on the isolation frame 302, and a control valve 6 disposed on the isolation frame 302; and / or the second adapter 305 also includes a connecting plate 303 disposed on the side of the main frame 301, with a connecting hole 3031 formed on the connecting plate 303.

[0092] The connecting plate 303 extends laterally along the bottom side of the main frame 301. The oxygen outlet 103 of the adsorption tower 1 is located on the bottom side of the adsorption tower 1 body, corresponding to the connecting plate 303 of the adsorption tower mounting frame 3. When the adsorption tower 1 is installed in the adsorption tower compartment 3011, this side of the adsorption tower 1 is located below the connecting plate 303, that is, this side of the adsorption tower 1 and the oxygen storage tank 12 are located on opposite sides of the connecting plate 303. The control valve 6 is located at the top of the main frame 301. Therefore, the vent is formed at the top of the adsorption tower 1, and the oxygen outlet 103 is formed at the bottom of the adsorption tower 1. The gas is compressed by the compressor 8 (described in detail later) and enters the control valve 6. After being controlled by the control valve 6, the gas enters the vent of the adsorption tower 1. The oxygen obtained after being generated by the molecular sieve 104 of the adsorption tower 1 is discharged from the oxygen outlet 103 of the adsorption tower 1 and stored in the oxygen storage tank 12.

[0093] In some embodiments, the oxygen storage tank 12 has an oxygen inlet connector 123 extending coaxially along the oxygen inlet, the oxygen inlet connector 123 being inserted into and sealed to the connection hole 3031.

[0094] Through the above configuration, on the one hand, the sealing performance of the connection between the oxygen inlet of the oxygen storage tank 12 and the connecting hole 3031 can be improved; on the other hand, when the connector 3032 of the connecting plate 303 is inserted into the oxygen outlet 103 of the adsorption tower 1, the oxygen inlet connector 123 is also located within the oxygen outlet 103, thus improving the communication and sealing performance between the oxygen inlet of the oxygen storage tank 12 and the oxygen outlet 103 of the adsorption tower 1. Furthermore, the fixed connection between the connecting plate 303 and the oxygen storage tank 12, and the insertion connection of the oxygen supply connector 121 to the connecting hole 3031, makes the assembly process more convenient.

[0095] In some embodiments, the control valve 6 and the adsorption tower 1 are connected in a non-contact manner via an isolation frame 302.

[0096] The control valve 6 is energized during use. To avoid electric shock or mechanical risks during the disassembly and assembly of the adsorption tower 1, the control valve 6 is isolated from the adsorption tower 1 by an isolation frame 302, preventing direct contact between the two. The isolation frame 302 is made of a non-conductive material.

[0097] In some embodiments, the isolation frame 302 includes an isolation tube 3022 and an isolation plate 3023 disposed on the isolation tube 3022. The interior of the isolation tube 3022 is formed with a mounting hole 3021. The axial dimension of the isolation tube 3022 is greater than or equal to the axial dimension of the vent connector 101. An isolation hole 3028 is formed on the isolation plate 3023. The mounting hole 3021, the isolation hole 3028 and the first working port 601 are coaxially connected in sequence. The control valve 6 and the isolation tube 3022 are respectively disposed on opposite sides of the isolation plate 3023. The isolation hole 3028 is formed as an isolation gap 3024 between the control valve 6 and the vent connector 101.

[0098] like Figure 6 As shown, the top end of the vent connector 101 is located inside the mounting hole 3021 of the isolation pipe 3022, so that the isolation hole 3028 is formed to isolate the adsorption tower 1 from the control valve 6. The mounting hole 3021, the isolation hole 3028, and the first working port 601 are coaxially connected in sequence. When the vent connector 101 is inserted into the mounting hole 3021, it can communicate with the first working port 601 of the control valve 6 without the need for additional connecting pipelines.

[0099] In addition, the isolation plate 3023 also provides an installation position for the control valve 6, making the internal structure of the oxygen concentrator more compact and the space design more reasonable, further reducing the size of the oxygen concentrator. Figure 7As shown, the isolation frame 302 also includes a side plate 3027 fixedly connected between the isolation plate 3023 and the main frame 301, which provides support for the isolation plate 3023 and enhances the installation stability of the control valve 6. At the same time, during the process of inserting or pulling the vent connector 101 into or out of the mounting hole 3021, the side plate 3027 can effectively resist the friction generated between the vent connector 101 and the isolation pipe 3022, making the overall structure of the isolation frame 302 more stable.

[0100] In some embodiments, the diameter of the isolation hole 3028 is larger than the diameter of the mounting hole 3021, so as to form a stepped groove 3025 at the outer periphery of the mounting hole 3021. A first sealing ring 3026 is provided in the groove 3025. When the vent connector 101 is inserted into the mounting hole 3021, a second sealing ring 102 is provided between the vent connector 101 and the mounting hole 3021 to form a closed isolation gap 3024. The vent connector 101 and the first working port 601 are connected through the isolation gap 3024. The closed isolation gap 3024 forms a sealed air passage, through which the vent connector 101 and the first working port 601 exchange gases.

[0101] In some embodiments, the oxygen generator also includes a housing 2, which has a first disassembly port 201. The adsorption tower chamber 3011 communicates with the first disassembly port 201, and the adsorption tower 1 is installed into the adsorption tower chamber 3011 through the first disassembly port 201. The detachable design of the adsorption tower 1 eliminates the need to disassemble the housing 2 when assembling or disassembling the adsorption tower 1, greatly reducing maintenance difficulty.

[0102] Furthermore, the adsorption tower mounting frame 3 has a second disassembly port 3012 connected to the adsorption tower chamber 3011. The first disassembly port 201, the second disassembly port 3012, and the adsorption tower chamber 3011 are sequentially connected, forming a disassembly path for the adsorption tower 1 to enter and exit the adsorption tower chamber 3011. The first disassembly port 201 and the second disassembly port 3012 are respectively formed at the bottom of the outer shell 2 and the adsorption tower mounting frame 3. This allows the adsorption tower 1 to fall to the outside of the adsorption tower chamber 3011 along the disassembly path under its own gravity.

[0103] In some embodiments, the adsorption tower 1 is inserted into the adsorption tower mounting frame 3, and the adsorption tower compartment 3011 extends gradually in the insertion direction of the adsorption tower 1. When the adsorption tower 1 is installed in the adsorption tower compartment 3011, part of the wall surface of the adsorption tower 1 can fit against the side wall 3013 of the adsorption tower mounting frame 3.

[0104] With the above configuration, the adsorption tower compartment 3011 is formed with a large bottom size and a small top size. The large bottom size of the adsorption tower compartment 3011 facilitates the alignment of the adsorption tower 1 with the adsorption tower compartment 3011, making it easier for the adsorption tower 1 to be accurately inserted into the adsorption tower compartment 3011. Specifically, the adsorption tower mounting frame 3 also includes a side wall 3013, which is inclined inward from bottom to top to form a gradually tapering adsorption tower compartment 3011. A protruding structure is formed around the top outer periphery of the adsorption tower 1. This protruding structure can fit against the side wall 3013 of the adsorption tower mounting frame 3. During the insertion of the adsorption tower 1 into the adsorption tower compartment 3011, the protruding structure can slide along the side wall 3013 of the adsorption tower mounting frame 3, serving as a guide and facilitating the accurate installation of the adsorption tower 1 into the designated position of the adsorption tower compartment 3011. No additional guide structure is required, and the component structure is simple.

[0105] In some embodiments, the oxygen generator also includes an adsorption tower compartment cover 4 detachably connected to the first disassembly port 201. When the adsorption tower 1 is placed inside the adsorption tower compartment 3011, the adsorption tower compartment cover 4 closes the first disassembly port 201 of the outer shell 2, making the oxygen generator more aesthetically pleasing. The adsorption tower includes a molecular sieve 104 and a lower end cover 1051 (described in detail later in the section on lower end cover assembly 105) connected below the molecular sieve 104 and detachably connected to the adsorption tower mounting frame 3. When the adsorption tower compartment cover 4 is removed from the outer shell 2, the lower end cover 1051 is exposed through the first disassembly port 201.

[0106] When it is necessary to disassemble the adsorption tower 1, remove the adsorption tower compartment cover 4 from the outer shell 2 to expose the lower end cover 1051, and then remove the lower end cover 1051 from the adsorption tower compartment 3011. When the adsorption tower 1 needs to be installed after replacement, first insert the adsorption tower 1 into the adsorption tower compartment 3011, then connect the lower end cover 1051 to the adsorption tower mounting frame 3, and finally fix the adsorption tower compartment cover 4 to the outer shell 2, so as to realize the convenient disassembly and assembly of the adsorption tower 1 and reduce the maintenance difficulty.

[0107] The lower end cover 1051 and the adsorption tower mounting bracket 3 can be connected by screws. The adsorption tower compartment cover 4 can be connected to the bottom of the outer shell 2 by screws. The adsorption tower compartment cover 4 includes a plate 401 and a protruding buckle 402 extending along the side of the plate 401. When the adsorption tower 1 is installed in the adsorption tower compartment 3011, the protruding buckle 402 is detachably fixed to the outer shell 2. The outer shell 2 includes a front shell 207 and a rear shell 208 that are spliced ​​and fastened together with a single screw, and a base 209 installed at the bottom of both. A first disassembly port 201 is formed on the base 209. The base 209 has a disassembly groove 202 protruding from the edge of the first disassembly port 201 to accommodate the protruding buckle 402. The size of the disassembly groove 202 is larger than the size of the protruding buckle 402, so as to form an operating gap 203 between at least part of the disassembly groove 202 and the protruding buckle 402, so as to facilitate the operator to open the adsorption tower compartment cover 4. The bottom of the slot 202 and the protrusion 402 have identical threaded holes. When the adsorption tower chamber cover 4 covers the first disassembly port 201, the two threaded holes are coaxial, allowing the adsorption tower chamber cover 4 and the base 209 to be connected by screws. A silicone pad is fixed under the base 209 to reduce vibration generated during oxygen generator operation. Furthermore, it should be noted that the fixing method in this solution is not limited to screws or bolts; it can be replaced with any disassembly method that does not require disassembly tools, such as locking and unlocking by pressing a latch.

[0108] In addition, the outer casing 2 also includes a decorative top plate 212 covering the front casing 207 and the rear casing 208, which is sealed to the front casing 207 and the rear casing 208 by a top plate sealing ring 213. The decorative top plate 212 is provided with a display 16 integrating a display screen and operation buttons, such as gear setting buttons and timer buttons, to realize human-computer interaction.

[0109] In some embodiments, the oxygen concentrator also includes a power connection assembly 5, configured to be able to connect to an external power source, which becomes the sole power source for the oxygen concentrator.

[0110] Compared to oxygen concentrators with batteries located on the bottom or side, this oxygen concentrator does not have batteries. Therefore, the first disassembly port 201 at the bottom of the outer casing 2 is not obstructed or interfered with by any other components. When disassembling the adsorption tower 1, it is not necessary to disassemble other components first; simply removing the adsorption tower compartment cover 4 will expose the adsorption tower compartment 3011, facilitating the disassembly and assembly of the adsorption tower 1, improving the efficiency of disassembly and assembly, enhancing portability, and making it more practical. In addition, this oxygen concentrator uses an external power supply, which frees up internal space and reduces the size of the oxygen concentrator. The external power supply can provide continuous power, avoiding the situation where the built-in battery runs out of power and suddenly stops supplying oxygen.

[0111] The power connection assembly 5 includes a connection socket 502, a connection plug 503, a power cord 504, and a power plug 501, which are electrically connected in sequence. The connection socket 502 is formed on the oxygen concentrator main unit, and the connection plug 503 is detachably connected to the connection socket 502. The connection plug 503, power cord 504, and power plug 501 are integrated, allowing for replacement by detaching the connection socket 502 if damaged. The connection socket 502 is electrically connected to all power-required components inside the oxygen concentrator, enabling an external power source to supply power to these components sequentially through the power plug 501, power cord 504, connection plug 503, and connection socket 502.

[0112] In addition, the power connection assembly 5 also includes an anti-disengagement buckle 505 fixed on the connection socket 502 and a switch 506 electrically connected to the connection socket 502. When the connector 503 is plugged into the connection socket 502, the anti-disengagement buckle 505 presses down and locks tightly onto the outer periphery of the connector 503 to prevent the connector 503 from falling off. The switch 506 controls the on / off state of the circuit. Even if the power plug 501 is plugged into an external power source, the oxygen concentrator cannot be powered on as long as the switch 506 is not closed. This avoids repeated plugging and unplugging of the power plug 501, which would accelerate its damage, and also ensures electrical safety. The connector 503 and the switch 506 are both located on the rear shell 208 of the outer casing 2 to avoid the first disassembly / removal port 201 of the outer casing 2, thus preventing the power connection assembly 5 from obstructing the disassembly / removal of the adsorption tower 1.

[0113] In some embodiments, the oxygen generator also includes a compressor mounting bracket 7 with a noise reduction chamber 701 disposed in the mounting chamber 215, a compressor 8 disposed in the noise reduction chamber 701, a main control board mounting bracket 9 and a cooling fan 10 disposed above the compressor mounting bracket 7, a main control board 11 disposed on the main control board mounting bracket 9, and a display 16 electrically connected to the main control board 11. The outer casing 2 has an air inlet 204 for external gas to enter the mounting chamber 215, an air inlet 205 for external gas to enter the compressor 8 (described in detail in the subsequent air intake assembly 14), and an air outlet 206 for gas to exit the mounting chamber 215. The air inlet 204, the adsorption tower mounting bracket 3, the compressor mounting bracket 7 and the air outlet 206 are arranged horizontally in sequence.

[0114] The air inlet 205 is connected to the compressor 8 via a pipeline. The compressor 8 is also connected to the second working port 602 formed on the control valve 6 via a pipeline. The second working port 602 is connected to the first working port 601. The oxygen supply connector 121 of the oxygen storage tank 12 is connected to the oxygen discharge port of the oxygen generator via a pipeline. The oxygen discharge port is used to connect to the user's breathing mask. The working principle of the oxygen generator is as follows: the air inlet 205 introduces external gas into the compressor 8. The compressor 8 compresses the gas and then inputs it to the adsorption tower 1 through the control valve 6. The molecular sieve inside the adsorption tower 1 generates oxygen. The generated oxygen is stored in the oxygen storage tank 12. The pulse valve 13 (described in detail later) connects to the breathing status sensor 159 (e.g., ...). Figure 42 (As shown) The oxygen supply circuit of the oxygen storage tank 12 is switched on and off by a pulse to achieve pulse oxygen supply.

[0115] In some embodiments, the compressor mounting bracket 7 has a through-hole 7021 communicating with the noise reduction chamber 701. The main control board mounting bracket 9 includes a mounting main frame 901 and an air guide plate 902. The mounting main frame 901 is staggered above the cooling fan 10. The air guide plate 902 is disposed on one side of the cooling fan 10 and above the through-hole 7021 to guide the gas output from the outlet of the cooling fan 10 into the noise reduction chamber 701 along the through-hole 7021.

[0116] The gas entering through air inlet 204 is heat dissipation gas, such as... Figure 9 As indicated by the middle arrow, the cooling gas enters the mounting chamber 215 through the air inlet 204. Under the action of the cooling fan 10, it flows sequentially through the adsorption tower 1, control valve 6, and main control board 11 before entering the noise reduction chamber 701. After carrying away the heat from the compressor 8, it is discharged from the air outlet 206. The flow path of the cooling gas can pass through all heat-generating components, effectively carrying away the heat generated by each heat-generating component and achieving effective cooling. The internal component structure of the mounting chamber 215 is compact and, in conjunction with the flow path of the cooling gas, gradually dissipates heat from each major heat-generating component, forming an effective heat dissipation path and maximizing the removal of heat from inside the outer casing 2.

[0117] The compressor mounting bracket 7 includes a base plate 703 and a cover 702 covering the base plate 703. The noise reduction chamber 701 is formed by the cover 702 and the base plate 703. The cover 702 is a square cover with an opening 7021 at its top, allowing heat dissipation gas to enter the noise reduction chamber 701 through the opening 7021. Figure 9 , Figure 36 and Figure 37 As shown, the main control board 11 and the cooling fan 10 are staggered from top to bottom, so that the pressure difference of the cooling fan 10 can promote a large amount of cooling gas to flow quickly through the main control board 11 and carry away the heat of the main control board 11.

[0118] In addition, such as Figure 9 , Figures 36 to 18 As shown, the main control board 11 is connected to the cooling fan 10 via the main control board mounting bracket 9. An arc-shaped air guide plate 902 is formed on the main control board mounting bracket 9 to create an arc-shaped airflow inlet. The air guide plate 902 is positioned directly above the opening 7021, with its concave arc-shaped side facing the opening 7021. Since the compressor 8 is one of the main heat-generating components, and the performance of the compressor 8 is significantly related to its temperature, the air guide plate 902 is provided. The cooling gas output by the cooling fan 10 first flows onto the air guide plate 902 and is guided by it into the noise reduction chamber 701, effectively promoting the cooling and temperature reduction of the compressor 8. The smooth arc-shaped surface of the air guide plate 902 allows for smooth flow of the cooling gas, avoiding airflow dead zones. For example, a right-angled air guide plate 902 would create airflow dead zones at the corners, preventing all the cooling gas from quickly entering the noise reduction chamber 701 along the opening 7021.

[0119] Furthermore, such as Figure 9 As shown, the square shape of the cover 702 forms two guiding right angles at its two upper corners, allowing the heat dissipation gas to flow along these two guiding right angles after entering the noise reduction chamber 701, thus filling the entire noise reduction chamber 701 and promoting the heat dissipation of the compressor 8.

[0120] The compressor 8 is equipped with elastic feet 801 at the bottom and high-density sponge at the head, which can reduce vibrations generated during operation and transportation of the oxygen concentrator. The inner wall of the compressor mounting bracket 7's cover 702 extends with anti-collision ribs 704 and protective structures to abut against the compressor 8, preventing displacement and collisions with the inner wall of the cover 702 due to vibration. This provides all-around protection for the compressor 8, overcoming the shortcomings of traditional oxygen concentrators that rely on straps and damping blocks for protection. A limiting protrusion 706 is formed on the base plate 703 of the compressor mounting bracket 7 to position the compressor 8 in the correct installation location.

[0121] A nitrogen venting silencer 705 is integrated on the compressor mounting bracket 7. The control valve 6 forms two second working ports 602. One of the second working ports 602 is connected to the compressor 8 as before, and the other second working port 602 is connected to the nitrogen venting silencer 705. A one-way valve can be set on the connection path between the two or on the nitrogen venting silencer 705 to guide the nitrogen gas discharged from the adsorption tower 1 into the nitrogen venting silencer 705 in one direction. Multiple noise reduction holes are formed inside the nitrogen venting silencer 705 to reduce the noise generated by the flow of nitrogen gas.

[0122] In some embodiments, the oxygen generator also includes a pulse valve 13 disposed at the oxygen supply end of the oxygen storage tank 12. The pulse valve 13 is controlled to open when the user is inhaling and close when the user is exhaling, so as to form a pulsed oxygen supply.

[0123] During the operation of the oxygen generator, the molecular sieve 104 in the adsorption tower 1 separates nitrogen and oxygen from the air and discharges oxygen from the oxygen outlet 103. The oxygen storage tank 12 receives and stores the oxygen discharged from the oxygen outlet 103 of the adsorption tower 1. When the user needs oxygen, the pulse valve 13 opens and the oxygen in the oxygen storage tank 12 is output to the patient's respiratory tract. When the user does not need oxygen, the pulse valve 13 closes and the oxygen in the oxygen storage tank 12 stops being output. Through this pulsed oxygen supply method, all the oxygen prepared by the adsorption tower 1 can be used as effective oxygen for the user to inhale. Compared to continuous oxygen concentrators, this oxygen concentrator is smaller in size while maintaining the same amount of oxygen inhaled by the user. Specifically, when a user needs to inhale 1L of oxygen, a continuous oxygen concentrator would waste oxygen even when the user isn't inhaling. Therefore, including this wasted oxygen, a continuous oxygen concentrator would need to produce more than 1L of oxygen to ensure the user can inhale 1L of oxygen. In contrast, this oxygen concentrator produces oxygen that can be completely inhaled by the user, thus requiring only 1L. The smaller the amount of oxygen produced, the fewer molecular sieves are needed, resulting in a smaller adsorption tower 1 and compressor 8, and ultimately a smaller overall size of the oxygen concentrator. This improved portability mitigates or eliminates the inconveniences of larger oxygen concentrators, while also reducing costs and energy consumption. Furthermore, even though this oxygen concentrator is only one liter, it achieves the same oxygen therapy effect as a large, six-liter continuous oxygen concentrator.

[0124] A one-way valve can be installed on the connection path between adsorption tower 1 and oxygen storage tank 12 to prevent oxygen backflow in oxygen storage tank 12.

[0125] In some embodiments, the control components also include a breathing state sensor 159, which is configured to detect inhalation and exhalation states, and the pulse valve 13 switches between an open state and a closed state based on the breathing state signal detected by the breathing state sensor 159.

[0126] The respiratory status sensor 159 can quickly determine whether the user is in an exhalation or inhalation state, thus enabling rapid oxygen supply and quick cessation of oxygen supply, minimizing oxygen waste.

[0127] The breathing status sensor 159 can be a breathing status sensor 159 installed on the oxygen tank 12, which indicates the user's inhalation and exhalation status by measuring the pressure changes generated during the user's inhalation and exhalation. In other alternative embodiments, the breathing status sensor 159 may not be installed on the main unit of the oxygen concentrator, but rather on the user's breathing mask connected to the oxygen concentrator.

[0128] In addition, the breathing state sensor 159 can be used in conjunction with the main control board 11 to realize automatic pulse oxygen supply. Specifically, the breathing state sensor 159, the main control board 11, and the pulse valve 13 are electrically connected in sequence. The breathing state sensor 159 detects the air pressure generated by the user's breathing and generates an air pressure signal, which is then transmitted to the main control board 11. The main control board 11 determines whether the user is inhaling or exhaling based on the air pressure signal. If the user is inhaling, it sends an opening signal to the pulse valve 13 to open the pulse valve 13 and start supplying oxygen to the oxygen storage tank 12. If the user is exhaling, it sends a closing signal to the pulse valve 13 to close the pulse valve 13 and stop supplying oxygen to the oxygen storage tank 12, thereby realizing automatic pulse oxygen supply.

[0129] In some embodiments, the oxygen storage tank 12 has a slot 122 for mounting a pulse valve 13, which is installed in the slot 122 and can control the opening and closing of the oxygen supply passage of the oxygen storage tank 12.

[0130] To facilitate the installation of the pulse valve 13 while taking into account the compact space inside the oxygen generator, a slot 122 is provided on the oxygen storage tank 12. The shape and size of the slot 122 can perfectly match the shape and size of the pulse valve 13. The pulse valve 13 is fixed in the slot 122 and is connected to the oxygen supply passage of the slot 122.

[0131] Lower end cap assembly

[0132] Reference Figures 17 to 21 As shown, the adsorption tower 1 also includes a lower end cap assembly 105, see [reference]. Figure 19 or Figure 20 Molecular sieve 104 includes a first molecular sieve container 1041 and a second molecular sieve container 1042 arranged side by side, see [link / reference] Figure 18 , Figure 20 and Figure 21 The lower end cap assembly 105 includes a lower end cap 1051 for connecting to the lower ends of the first molecular sieve barrel 1041 and the second molecular sieve barrel 1042. The lower end cap 1051 has a purge air passage 1512 and two purge holes 1513 communicating with the purge air passage 1512. The two purge holes 1513 are used to connect to the first molecular sieve barrel 1041 and the second molecular sieve barrel 1042 respectively.

[0133] When in use, when the first molecular sieve barrel 1041 generates oxygen and the second molecular sieve barrel 1042 discharges nitrogen, the pressure in the first molecular sieve barrel 1041 will be higher than that in the second molecular sieve barrel 1042. At this time, the gas in the first molecular sieve barrel 1041 will enter the purge gas channel 1512 through the corresponding purge port 1513, and then enter the second molecular sieve barrel 1042 through another purge port 1513, thereby achieving back-purge of the second molecular sieve barrel 1042 and facilitating the discharge of nitrogen in the second molecular sieve barrel 1042. Conversely, when the first molecular sieve barrel 1041 discharges nitrogen and the second molecular sieve barrel 1042 generates oxygen, the pressure in the second molecular sieve barrel 1042 will be higher than that in the first molecular sieve barrel 1041. At this time, the gas in the second molecular sieve barrel 1042 will enter the purge gas channel 1512 through the corresponding purge port 1513, and then enter the first molecular sieve barrel 1041 through another purge port 1513, thereby achieving back-purge of the first molecular sieve barrel 1041, which is beneficial to the discharge of nitrogen in the first molecular sieve barrel 1041.

[0134] The lower end cap assembly 105 integrates a purge air passage 1512 and a purge hole 1513 on the lower end cap 1051, which enables back-purge of the first molecular sieve barrel 1041 and the second molecular sieve barrel 1042. Compared with the external hose method used in the prior art, it can optimize the structure, simplify the operation, and facilitate the discharge of nitrogen.

[0135] In some embodiments, the lower end cap assembly 105 may further include two purge components 1052 respectively disposed on the communication path between the two purge holes 1513 and the purge air passage 1512. It should be noted that in this embodiment, due to the presence of the purge components 1052, the aperture of the purge holes 1513 can be set relatively large. In embodiments without purge components 1052, the aperture of the purge holes 1513 needs to be set smaller to achieve the purge effect.

[0136] The purging component 1052 can be any structure capable of increasing the flow velocity of the fluid medium and relatively reducing the hydrostatic pressure, thereby generating a pressure difference between the upstream and downstream sides of the purging component 1052, such as a throttling device like a flow bridge or orifice plate. For example... Figure 21 As shown, the purging component 1052 is a throttling bridge, and the central aperture of the throttling bridge can be adjusted according to the adsorption parameters of the molecular sieve barrel.

[0137] In this invention, the purge air passage 1512 can extend on the lower end cover 1051 in any form. For example, it can extend on the plane where the lower end cover 1051 is located, or it can extend at an angle relative to the plane where the lower end cover is located; it can extend in a straight line or in a curve; it can extend inside the lower end cover 1051 or on the surface of the lower end cover 1051.

[0138] In some implementations, see Figure 18The purge air passage 1512 extends horizontally on the plane of the lower end cover 1051. In this case, two purge holes 1513 can be located above the purge air passage 1512, and the purge component 1052 can be located on the vertical communication path between the purge holes 1513 and the purge air passage 1512. This allows for full utilization of the space in the lower end cover 1051 and optimizes the layout. The two purge holes 1513 can be located at opposite ends of the purge air passage 1512.

[0139] Furthermore, such as Figure 18 As shown, the purge air passage 1512 is a straight channel, and the lower end cover 1051 has a rectangular cross-sectional shape. The purge air passage 1512 extends along the length of the lower end cover 1051, that is, along the arrangement direction of the first molecular sieve barrel 1041 and the second molecular sieve barrel 1042. Setting the purge air passage 1512 as a straight channel can reduce the resistance of the air passage to the fluid and reduce the pressure drop of the fluid during the flow process.

[0140] like Figure 21 As shown, the purging component 1052 is disposed near the purging hole 1513 and is sealed to the purging hole 1513 by a purging sealing ring 1053. A stepped structure is provided on the communication path between the purging hole 1513 and the purging air passage 1512 to accommodate the installation of the purging component 1052 and the purging sealing ring 1053.

[0141] To facilitate the disassembly and assembly of the purging component 1052 and the purging seal ring 1053, as well as the cleaning and formation of the purging air passage 1512, preferably, see Figure 17 , Figure 18 and Figure 21 The purge hole 1513 is formed on the upper surface of the lower end cover 1051, and the purge air passage 1512 is recessed on the lower surface of the lower end cover 1051. The lower end cover assembly 105 also includes a cover plate 1054 that covers the lower surface of the lower end cover 1051 to close the purge air passage 1512. In order to ensure the seal between the lower end cover 1051 and the cover plate 1054 and prevent gas leakage in the purge air passage, an air passage sealing gasket 1055 may be provided between the cover plate 1054 and the lower end cover 1051.

[0142] like Figure 18As shown, the lower end cover 1051 also has a first oxygen channel 1514, a first oxygen outlet 1515 connecting the first oxygen channel 1514 and the first molecular sieve barrel 1041, a second oxygen channel 1516, and a second oxygen outlet 1517 connecting the second oxygen channel 1516 and the second molecular sieve barrel 1042. In use, oxygen produced in the first molecular sieve barrel 1041 can be collected by entering the first oxygen channel 1514 through the first oxygen outlet 1515, and oxygen produced in the second molecular sieve barrel 1042 can be collected by entering the second oxygen channel 1516 through the second oxygen outlet 1517. Thus, the lower end cover 1051 integrates purging and oxygen output into one unit, further simplifying the structure.

[0143] In this invention, the first oxygen channel 1514 and the second oxygen channel 1516 can extend on the lower end cover 1051 in any form. For example, they can extend on the plane where the lower end cover 1051 is located, or they can extend at an angle relative to the plane where the lower end cover is located; they can extend in a straight line or in a curve; they can extend inside the lower end cover 1051 or on the surface of the lower end cover 1051.

[0144] In some implementations, see Figure 18 The first oxygen channel 1514 and the second oxygen channel 1516 extend on the plane of the lower end cover 1051, that is, the first oxygen channel 1514 and the second oxygen channel 1516 extend horizontally on the lower end cover 1051. In this case, the first oxygen outlet 1515 can be located above the first oxygen channel 1514, and the second oxygen outlet 1517 can be located above the second oxygen channel 1516. In this way, the space of the lower end cover 1051 can be fully utilized, and the layout can be optimized. The lower cover plate 131 may also have two oxygen outlets 1518 that communicate with the first oxygen channel 1514 and the second oxygen channel 1516 respectively. The oxygen outlets 1518 and the first oxygen outlet 1515 / second oxygen outlet 1517 are located at the two ends of the first oxygen channel 1514 / second oxygen channel 1516 respectively.

[0145] Furthermore, such as Figure 18 As shown, the first oxygen channel 1514 is a curved channel, the second oxygen channel 1516 is a straight channel, and the lower end cover 1051 has a rectangular cross-sectional shape. The first oxygen channel 1514 and the second oxygen channel 1516 extend along the length of the lower end cover 1051. Both oxygen outlets 1518 are located on the left side of the lower end cover 1051. The first oxygen channel 1514 is longer because it needs to connect with the first molecular sieve barrel 1041, which is farther away from the oxygen outlet 1518. The second oxygen channel 1516 is shorter because it connects with the second molecular sieve barrel 1042, which is closer to the oxygen outlet 1518.

[0146] To facilitate the cleaning and formation of the first oxygen channel 1514 and the second oxygen channel 1516, preferably, see [reference needed]. Figure 17 and Figure 18 The first oxygen outlet 1515 and the second oxygen outlet 1517 are formed on the upper surface of the lower end cover 1051, and the first oxygen channel 1514 and the second oxygen channel 1516 are recessed on the lower surface of the lower end cover 1051.

[0147] When the lower end cover 1051 has a purge airway 1512, a first oxygen passage 1514, and a second oxygen passage 1516, the airway sealing gasket 1055 is used to simultaneously seal the purge airway 1512, the first oxygen passage 1514, and the second oxygen passage 1516. For example... Figure 18 As shown, the first oxygen channel 1514 is located on the lower side of the lower end cover 1051, and the purge air channel 1512 and the second oxygen channel 1516 are located side by side on the upper side of the lower end cover 1051. The total length of the purge air channel 1512 and the second oxygen channel 1516 in the longitudinal direction of the lower end cover 1051 is similar to the length of the first oxygen channel 1514. Figure 17 As shown, the airway sealing gasket 1055 is shaped to fit the overall contour of the purge airway 1512, the first oxygen channel 1514, and the second oxygen channel 1516. The cover plate 1054 simultaneously seals the purge airway 1512, the first oxygen channel 1514, and the second oxygen channel 1516. The cover plate 1054 is detachably connected to the lower end cover 1051.

[0148] like Figure 17 and Figure 18 As shown, a second groove 1519 may also be provided on the lower surface of the lower end cover 1051, surrounding the purge air passage 1512, the first oxygen passage 1514 and the second oxygen passage 1516, and the air passage sealing gasket 1055 is embedded in the second groove 1519.

[0149] The molecular sieve 104 of the adsorption tower 1 includes a first molecular sieve barrel 1041 and a second molecular sieve barrel 1042 arranged side by side, and a lower end cap assembly 105, which is connected to the lower end of the first molecular sieve barrel 1041 and the second molecular sieve barrel 1042.

[0150] The oxygen generator also includes an adsorption tower mounting frame 3, which internally defines an adsorption tower chamber 3011 for mounting a first molecular sieve barrel 1041 and a second molecular sieve barrel 1042. The adsorption tower chamber 3011 has an opening for the first molecular sieve barrel 1041 and the second molecular sieve barrel 1042 to enter and exit, and a lower end cover 130 is installed at the opening. The adsorption tower mounting frame 3 is provided with a connecting plate 303 on one side of the opening. The oxygen generator also includes an oxygen storage tank 12, which is mounted on the connecting plate 303. The connecting plate 303 has a connecting hole 3031 through which the oxygen inlet connector 123 of the oxygen storage tank 12 passes to insert into the oxygen outlet 1518 of the lower end cover 1051.

[0151] The oxygen storage tank 12 has two oxygen inlet connectors 123, and the connecting plate 303 is provided with two connecting holes 3031 (e.g., Figure 7 and Figure 20 (As shown). See also Figure 7 and Figure 20 Two oxygen inlet connectors 123 are inserted into two oxygen outlets 1518 through two connection holes 3031, respectively. The oxygen inlet connectors 123 can collect oxygen from the first oxygen channel 1514 and the second oxygen channel 1516 into the oxygen storage tank 12. See also... Figure 19 and Figure 20 An oxygen inlet sealing ring 124 may also be provided between the oxygen inlet connector 123 and the oxygen outlet 1518.

[0152] See Figure 7 , Figure 20 and Figure 21 The lower end cover 1051, cover plate 1054, and connecting plate 303 are each provided with a second connecting hole 1520. Cover plate 1054 is detachably connected to lower end cover 1051 by bolts 107, and lower end cover 1051 is detachably connected to connecting plate 303 by bolts 107. During assembly, cover plate 1054 is first connected to lower end cover 1051, and then lower end cover 1051 is connected to connecting plate 303. To improve assembly reliability and efficiency, positioning structures can be provided between cover plate 1054 and lower end cover 1051, and between lower end cover 1051 and connecting plate 303. For example... Figure 21 As shown, a positioning post 1511 can be provided on the lower end cover 1051, and a positioning hole 3034 adapted to the positioning post 1511 can be provided on the connecting plate 303.

[0153] like Figure 19 As shown, the lower end cap assembly 105 may also include a lower end cap sealing gasket 1056, which is used to seal between the lower end cap 1051 and the lower ends of the first molecular sieve barrel 1041 and the second molecular sieve barrel 1042.

[0154] like Figure 19 and Figure 20As shown, the oxygen generator may further include an upper cover 106, an upper cover sealing gasket 1061, a second sealing ring 102, a control valve 6, and a first sealing ring 3026. The upper cover 106 is connected to the upper ends of the first molecular sieve barrel 1041 and the second molecular sieve barrel 1042. The upper cover 106 has two air inlet / nitrogen outlet ports 1062, respectively communicating with the first and second molecular sieve barrels 1041 and 1042 (for air intake and nitrogen exhaust from the molecular sieve barrels). The second sealing ring 102 is sealed between the air inlet / nitrogen outlet ports 1062 and the adsorption tower chamber 3011. The control valve 6 is located above the adsorption tower mounting frame 3, connected to the upper cover 106 through an opening on the adsorption tower mounting frame 3, and sealed by the first sealing ring 3026.

[0155] Heat dissipation and noise reduction structure

[0156] Reference Figures 22 to 37 As shown, the oxygen generator of this utility model also includes a heat dissipation and noise reduction structure 17, including a sound insulation guide plate 171. The inner side of the sound insulation guide plate 171 has a first guide cavity 1711 for guiding the heat dissipation gas to flow in a first direction, and the outer side has a second guide cavity 1712 for guiding the heat dissipation gas to flow in a second direction opposite to the first direction and communicating with the first guide cavity 1711. The end of the sound insulation guide plate 171 facing the second direction is configured as a multi-layer structure 1714 to form a sound insulation cavity 1715 between adjacent layers.

[0157] The sound-insulating deflector plate 171 forms a first deflector cavity 1711 and a second deflector cavity 1712 for the flow of heat-dissipating gas carrying heat and noise. Due to the multi-layer structure 1714, noise needs to penetrate each layer of the multi-layer structure 1714 multiple times and also needs to pass through the air wall formed in the sound-insulating cavity 1715 before reaching the second deflector cavity 1712. Therefore, the probability of noise directly penetrating the multi-layer structure 1714 is greatly reduced. That is, the multi-layer structure 1714 acts as a barrier to noise, making the first deflector cavity... Noise within 1711 cannot pass extensively through the multi-layer structure 1714 to reach the second guide cavity 1712. Instead, it flows in a first direction within the first guide cavity 1711, enters the second guide cavity 1712, and then flows in a second direction before being discharged. In other words, the multi-layer structure 1714 limits the flow of cooling gas to a longer path than the path from the multi-layer structure 1714 to the second guide cavity 1712. During this flow, noise is significantly reduced, and by the time it exits the second guide cavity 1712, the noise level is sufficiently low. Oxygen concentrators with this heat dissipation and noise reduction structure meet heat dissipation requirements while emitting low noise, avoiding user inconvenience and reducing or eliminating the negative impacts of noise.

[0158] The first direction is the lateral direction within the first guide cavity 1711 from the airflow inlet 7031 (described in detail later) away from the airflow inlet 7031, that is... Figures 23 to 5 The direction from left to right is the second direction, which is the lateral direction within the second guide cavity 1712 opposite to the first direction. Figures 23 to 5 The direction from right to left. Figure 24 The arrows in the diagram indicate the actual flow direction of the noise. The first direction is the approximate flow direction of the heat dissipation gas in the first guide cavity 1711, and the second direction is the approximate flow direction of the heat dissipation gas in the second guide cavity 1712.

[0159] Specifically, the multi-layer structure 1714 can be formed by two layers of plate-like structures spaced apart, or by more than two layers of plate-like structures spaced apart.

[0160] In some embodiments, the sound-insulating deflector plate 171 has a first deflector plate 1716 and a second deflector plate 1717 extending from both ends of the multilayer structure 1714 and disposed opposite to each other. The portions of the first deflector plate 1716 and the second deflector plate 1717 away from the multilayer structure 1714 are respectively formed with through holes 1713 that connect the first deflector cavity 1711 to the second deflector cavity 1712, so as to allow the heat dissipation gas in the first deflector cavity 1711 to be discharged to the second deflector cavity 1712 through the through holes 1713.

[0161] The multi-layer structure 1714, the first guide plate 1716, and the second guide plate 1717 together form the first guide cavity 1711. Noise in the first guide cavity 1711 cannot pass through the multi-layer structure 1714 in large quantities. Instead, it can only be carried by the heat dissipation gas and flow in a direction away from the multi-layer structure 1714, which is the first direction. Based on this, the through hole 1713 is set at a position away from the multi-layer structure 1714 so that the heat dissipation gas can flow along a longer flow path to the through hole 1713, which is beneficial for noise consumption. At the same time, the longer path can also promote heat consumption.

[0162] Among them, the multi-layer structure 1714, the first guide plate 1716, and the second guide plate 1717 together form the sound-insulating guide plate 171, which can be U-shaped (e.g., Figure 23 ), flask type (such as Figure 25 ), funnel-shaped (e.g.) Figure 26 Or any other shape that can meet the installation space requirements and realize the function of the sound insulation guide plate 171. The installation space is defined by the shape and area of ​​the side of the base plate body 7033 of the base plate 703 facing the heat dissipation and noise reduction structure. The sound insulation guide plate 171 of the heat dissipation and noise reduction structure needs to have enough space on the outside to form the second guide cavity 1712.

[0163] In some embodiments, the heat dissipation and noise reduction structure further includes a partition 172 disposed between the first guide plate 1716 and the second guide plate 1717, the partition 172 being configured to separate the through holes 1713 on the first guide plate 1716 and the second guide plate 1717.

[0164] On the one hand, since the first guide plate 1716 and the second guide plate 1717 are arranged opposite each other, and the through holes 1713 formed on them are also arranged opposite each other, during the flow of heat dissipation gas, if there is no partition 172, the heat dissipation gas in the first guide cavity 1711 will flow simultaneously to the through holes 1713 of the two guide plates, which will form turbulence. Turbulence will generate noise, increasing the difficulty of noise treatment. To avoid this situation, a partition 172 is set between the first guide plate 1716 and the second guide plate 1717, so that the heat dissipation gas forms two non-interfering airflows on both sides of the partition 172, avoiding the contact of the two airflows and the generation of turbulence. On the other hand, as Figure 24 As shown by the middle arrow, when noise is between the first guide plate 1716 and the baffle 172, it can bounce repeatedly on the first guide plate 1716 and the baffle 172. Similarly, when noise is between the second guide plate 1717 and the baffle 172, it can bounce repeatedly on the second guide plate 1717 and the baffle 172. The sound waves are gradually consumed and reduced during the bounce process on both sides of the baffle 172.

[0165] In some embodiments, the first guide plate 1716 and the second guide plate 1717 each have multiple rows of through holes 1713 arranged aligned with each other or staggered with each other.

[0166] When noise passes through multiple through holes 1713, the loud sound wave can be cut into multiple small sound waves. The small sound waves are easier to process. When the noise passes through the first guide cavity 1711 to the second guide cavity 1712, it has been formed into multiple small sound waves. These small sound waves are consumed and absorbed during the flow in the second guide cavity 1712, which improves the noise processing effect. At the same time, since the small sound waves can be consumed and absorbed faster, the noise processing efficiency is also increased.

[0167] The through hole 1713 can be formed into a square, rhombus, circle or any other suitable shape.

[0168] In some embodiments, a heat dissipation and noise reduction structure is disposed on a base plate 703, which has a base plate body 7033. A positioning structure 7032 for positioning and installing the compressor 8 is formed on one side of the base plate body 7033, and a heat dissipation and noise reduction structure is formed on the other side.

[0169] Among them, with Figure 9Described in the indicated orientation, the side of the base plate main body 7033 where the positioning structure 7032 is formed is the upper surface of the base plate main body 7033, and the side where the heat dissipation and noise reduction structure is formed is the lower surface of the base plate main body 7033. Since the compressor 8, mounted to the positioning structure 7032, is the main noise-generating component, the heat dissipation and noise reduction structure is mounted on the base plate 703 together with the compressor 8. Figure 9 As can be seen, the heat dissipation and noise reduction structure can isolate the noise generated by the compressor 8 from the air outlet 206 on the outer casing 2 (described in detail later). As the noise flows with the cooling gas towards the air outlet 206, the heat dissipation and noise reduction structure can prevent a large amount of noise from being discharged from the outer casing 2 to the outside of the outer casing 2. In addition, the positioning structure 7032 and the heat dissipation and noise reduction structure can make full use of the space on both sides of the base plate 7033, making the overall setup more compact.

[0170] Specifically, the base plate 7033, which has a heat dissipation and noise reduction structure, also has a positioning groove 7034 on one side. A first baffle 2091, whose shape and size are adapted to the positioning groove 7034, protrudes from the base 209 of the outer casing 2. During installation, the top of the first baffle 2091 engages with the positioning groove 7034. Due to the structure of the first baffle 2091... Figure 24 From the viewing direction, it has the same structure as the positioning groove 7034, therefore... Figure 24 The positioning groove 7034 simulates the function of the first baffle 2091. When noise moves within the second guide cavity 1712, it can repeatedly bounce between the sound-insulating guide plate 171 and the first baffle 2091, promoting the dissipation of sound waves. At the same time, the first baffle 2091 also serves as a guide, directing the heat dissipation gas to carry heat out of the second guide cavity 1712.

[0171] In some embodiments, an airflow inlet 7031 communicating with a first flow guide cavity 1711 is formed on the base plate body 7033, and the multilayer structure 1714 is configured to at least partially surround the airflow inlet 7031.

[0172] The airflow inlet 7031 is positioned adjacent to the multi-layer structure 1714. The positions of the through holes 1713 on the first guide plate 1716 and the second guide plate 1717 are also designed to match the position of the airflow inlet 7031 on the base plate 703. The through holes 1713 are located away from the multi-layer structure 1714, limiting the flow of heat dissipation gas to a position only adjacent to the multi-layer structure 1714 and away from it. This fully utilizes the space of the first guide cavity 1711 to extend the flow path of the heat dissipation gas. The airflow inlet 7031 can be a square opening or other opening that allows heat dissipation gas to enter the first guide cavity 1711.

[0173] In addition, when the heat dissipation gas enters the first guide cavity 1711 from the airflow inlet 7031, it can flow freely in a direction around the entire circumference of the airflow inlet 7031. In order to limit the flow of the heat dissipation gas away from the airflow inlet 7031, the multi-layer structure 1714 is set to at least partially surround the airflow inlet 7031. In this way, after the heat dissipation gas enters the first guide cavity 1711, it can be blocked by the multi-layer structure 1714 and flow in the first direction, ensuring that the heat dissipation gas can flow along a long flow path.

[0174] In some implementations, an expansion chamber is formed between the inner wall of the multi-layered structure and the airflow inlet.

[0175] The formation of the expansion chamber 1718 allows noise to enter the first guide chamber 1711 from the airflow inlet 7031, and then partially or entirely enter the expansion chamber 1718. Within the expansion chamber 1718, noise is either reflected or partially absorbed by sound-absorbing cotton that can be placed inside, thus providing initial noise mitigation and treatment. The noise is then directed to flow in the first direction, thereby enhancing the noise treatment effect. Specifically, as... Figure 25 and Figure 26 As shown in the two embodiments, the portion of the multilayer structure 1714 located on at least one side of the airflow inlet 7031 protrudes toward the second guide cavity 1712 relative to the airflow inlet 7031 to form an expansion chamber 1718 at a position adjacent to the airflow inlet 7031.

[0176] In some embodiments, the multilayer structure 1714 has arcuate sidewalls.

[0177] The multi-layered structure of the 1714 features curved sidewalls that allow for a smoother and more stable flow of heat dissipation gases. Specifically, as shown... Figure 23 As shown, the inner and outer walls of the multilayer structure 1714 are formed as concave and convex arc surfaces, respectively. When the heat dissipation gas is located in the first guide cavity 1711, it can flow smoothly and stably along the concave arc surface of the multilayer structure 1714. Similarly, when the heat dissipation gas is located in the second guide cavity 1712, it can flow smoothly and stably along the convex arc surface of the multilayer structure 1714.

[0178] The heat dissipation and noise reduction structure and the compressor 8 are respectively set on opposite sides of the base plate 703 of the compressor mounting bracket 7. The other side is provided with the aforementioned heat dissipation and noise reduction structure. The heat dissipation gas flowing through the compressor 8 passes through the first guide cavity 1711 and the second guide cavity 1712 in sequence and is then discharged to the outside of the outer casing 2.

[0179] As mentioned before, the function of the heat dissipation and noise reduction structure is to process noise inside the outer casing 2, preventing noise from being discharged into the outer casing 2 and affecting the user experience. At the same time, the heat dissipation and noise reduction structure and the compressor 8, which mainly generates noise, are set together on the base plate 703. In this way, the large amount of noise generated by the compressor 8 can be processed quickly and effectively, improving the noise treatment effect.

[0180] The base 209 of the outer shell 2 has a first baffle 2091 and a second baffle 2092 protruding from it. The setting of the first baffle 2091 has been described above and will not be repeated here. The second baffle 2092 abuts against the side of the bottom plate body 7033 where a heat dissipation and noise reduction structure is formed. The opposite side of the sound insulation guide plate 171 with a multi-layer structure 1714 is formed as an opening. The second baffle 2092 closes the opening to ensure that the heat dissipation gas can only move from the airflow inlet 7031 to the through hole 1713 and cannot flow out from the opening.

[0181] Depend on Figure 23 As can be seen from the positioning groove 7034 structure, the first baffle 2091 is composed of two plates, and the second baffle 2092 is formed into a "U" shape. The two plates of the second baffle 2092 and the first baffle 2091 are connected to form a "U" shape with a larger inner depth. The two can be formed by an integral structure, and the sound insulation guide plate 171 is confined inside the large "U" shape.

[0182] The side of the sound-insulating guide plate 171 facing away from the base plate 703 is also formed as an opening, and the side of the base 209 facing the sound-insulating guide plate 171 closes this opening of the sound-insulating guide plate 171. The inner wall of the sound-insulating guide plate 171, the side of the base 209 facing the sound-insulating guide plate 171, and a portion of the second baffle 2092 together form a first guide cavity 1711 that is closed except for the airflow inlet 7031; the outer wall of the sound-insulating guide plate 171, the side of the base 209 facing the sound-insulating guide plate 171, the first baffle 2091, and a portion of the second baffle 2092 together form a second guide cavity 1712 that is closed except for the air outlet 206.

[0183] In some embodiments, the housing 2 or the base plate 703 is provided with sound-absorbing cotton located in the flow path of the heat dissipation gas.

[0184] Specifically, sound-absorbing cotton can be placed on the base 209. During the rebound of noise within the first and second flow channels 1711 and 1712, it is gradually absorbed by the sound-absorbing cotton, thus reducing noise. Furthermore, the repeated rebound of noise increases the residence time within the first and second flow channels 1711 and 1712, allowing for greater absorption by the sound-absorbing cotton and further enhancing the noise reduction effect. Additionally, after passing through the through-hole 1713, the sound waves become smaller and are more easily absorbed by the sound-absorbing cotton, further increasing the noise reduction effect. The combination of sound-absorbing cotton and the heat dissipation and noise reduction structure effectively reduces noise, achieving optimal noise reduction results.

[0185] In some embodiments, the air inlet 204 includes a first inlet 2041 and / or a second inlet 2042 arranged in a staggered manner, through which heat dissipation gas is sequentially drawn into the housing 2.

[0186] A single inlet can be provided on the outer casing 2, namely a first inlet 2041 or a second inlet 2042.

[0187] The outer casing 2 can also be provided with two inlets, namely a first inlet 2041 and a second inlet 2042. For example... Figure 9 As shown, the outer casing 2 has an air inlet cover 210 covering the outside of the second inlet 2042, forming a first inlet 2041 offset from the second inlet 2042 at a position adjacent to the air inlet cover 210. Gas outside the outer casing 2, blocked by the air inlet cover 210, forms a zigzag air intake path through the first inlet 2041 and the second inlet 2042. Under the action of the cooling fan 10 installed inside the outer casing 2, gas outside the outer casing 2 can continuously flow into the outer casing 2. Therefore, the arrangement of the first inlet 2041 and the second inlet 2042 does not affect the efficiency of gas entering the outer casing 2. Noise inside the outer casing 2 flows through the second inlet 2042 to the air inlet cover 210, and is then reflected back into the outer casing 2, thereby reducing the direct transmission of noise from inside the outer casing 2 to the outside of the outer casing 2 through the second inlet 2042 and improving the noise level of the oxygen concentrator. The air inlet cover 210 also prevents dust from entering the interior of the housing 2 through the second inlet 2042. In addition, the first inlet 2041 is recessed inward from the outside to the inside of the housing 2 compared to the air inlet cover 210, which also provides some dust protection.

[0188] Specifically, an inlet grille 218 and filter cotton are provided at the second inlet 2042, which can filter external impurities to a certain extent. The air inlet cover 210 is detachable, and an arrow is marked on the side opposite to the second inlet 2042. By pulling the air inlet cover 210 in the direction of the arrow, the air inlet cover 210 can be removed so that the filter cotton can be cleaned.

[0189] The outer casing 2 is also provided with an air outlet 206, which is located on the side of the multi-layer structure 1714 facing the outer casing 2. An exhaust grille 217 is provided at the air outlet 206 to isolate impurities from the outside of the outer casing 2.

[0190] In some embodiments, the oxygen generator also includes an adsorption tower mounting frame 3 disposed inside the housing 2 and opposite to the second inlet 2042. The adsorption tower mounting frame 3 has an adsorption tower compartment 3011 for mounting the adsorption tower 1, and a heat dissipation notch 3014 is provided on the side of the adsorption tower mounting frame 3 facing the second inlet 2042.

[0191] Since the adsorption tower 1 generates a large amount of heat during adsorption and desorption, a heat dissipation notch 3014 is provided on the adsorption tower mounting frame 3. The heat dissipation gas entering the shell 2 from the second inlet 2042 first flows through the heat dissipation notch 3014 to the adsorption tower 1. The lowest temperature heat dissipation gas preferentially carries away the heat of the adsorption tower 1, which can effectively reduce the heat generation of the adsorption tower 1 and prevent excessive heat from affecting the normal operation of the adsorption tower 1. In addition, the adsorption tower 1 includes an aluminum alloy barrel and a molecular sieve installed inside. The aluminum alloy barrel has good thermal conductivity, and the heat generated by the molecular sieve is quickly and massively transferred to the surface of the aluminum alloy barrel. With the setting of the heat dissipation notch 3014, the heat on the surface of the aluminum alloy barrel can be carried away by the heat dissipation gas. In addition, a heat dissipation vent is formed on the top of the adsorption tower mounting frame 3. The heat dissipation gas can carry the heat of the adsorption tower 1 and then be discharged from the heat dissipation vent to the outside of the adsorption tower chamber 3011.

[0192] Intake components

[0193] See Figures 38 to 41 The oxygen concentrator also includes an air intake assembly 14, with an air intake chamber 216 formed at the air intake port 205. The air intake assembly 14 includes a filter element 141, which is housed in the air intake chamber 216. The filter element 141 is sealed to the periphery of the air intake chamber 216. An air intake port 205 is formed on one side of the air intake chamber 216 for the filter element 141 to enter and exit the air intake chamber 216. An air intake window cover 211 is placed over the air intake port 205. The assembly gap between the air intake window cover 211 and the air intake port 205 forms the main air intake of the air intake assembly 14. A secondary air intake port for gas to enter the downstream is opened on the second side wall 2162 of the air intake chamber 216 opposite to the air intake port 205.

[0194] As described above, the air intake chamber 216 is defined by the peripheral wall 2161 and the second side wall 2162. An assembly gap exists between the air intake cover 211 and the air intake port 205. After the air intake cover 211 is placed over the air intake port 205, external gas (e.g., air) can enter the air intake chamber 216 through the assembly gap. In other words, air can enter the air intake chamber 216 from one side, several sides, or all around the air intake cover 211. Since no air vents are provided on the air intake cover 211, noise transmission is reduced, achieving a noise reduction effect. Furthermore, the air intake cover 211 prevents foreign objects from entering the air intake chamber 216, thus protecting it.

[0195] Furthermore, it is understandable that the outer periphery of the filter element 141 is adapted to the circumferential contour of the peripheral wall 2161. Since the filter element 141 is sealed to the peripheral wall 2161 of the air intake chamber 216, all air entering the air intake chamber 216 from the assembly gap between the air intake window cover 211 and the air intake port 205 will flow through the filter element 141 and be filtered, thereby effectively improving the filtration effect. The air filtered by the filter element 141 will flow downstream through the secondary air intake port.

[0196] The air intake assembly 14 provided by this utility model can effectively improve the air filtration effect and effectively reduce the intake noise without affecting the intake resistance.

[0197] In some embodiments, the secondary air intake is formed by a plurality of air intake silencer holes 214 formed on the second side wall 2162. The air intake silencer holes 214 can play the role of air intake silencer, making the intake noise lower.

[0198] In this invention, to facilitate the maintenance and replacement of the filter element 141, the air intake cover 211 is preferably detachably mounted on the air intake 205. Specifically, the air intake cover 211 can be detachably connected to the air intake chamber 216 via a snap-fit ​​structure. The snap-fit ​​structure can adopt any suitable structure in the prior art, and the improvement of this invention does not lie in this, so it will not be described in detail.

[0199] In this invention, the filter element 141 serves both to filter air and to provide a seal. Therefore, the filter element 141 can include two parts: a sealing part and a filtering part. Specifically, in some embodiments, the filter element 141 includes a sealing ring 1411 (i.e., the sealing part) and an intake filter paper 1412 (i.e., the filtering part) disposed within the contour of the sealing ring 1411. The sealing ring 1411 is in a sealing fit with the peripheral wall 2161 of the intake chamber 216, and the sealing ring 1411 can support the intake filter paper and seal against the peripheral wall of the intake chamber. For example... Figure 41As shown, the filter element 141 includes a square sealing ring 1411 (understandably, in this case, the air intake chamber is also square) and a square air intake filter paper 1412 fixedly connected within the contour of the sealing ring 1411. The axial direction of the sealing ring 1411 (see...) Figure 40 The thickness (in the horizontal direction shown) is different from the axial thickness of the inlet filter paper 1412 (see...). Figure 40 The thickness (in the horizontal direction shown) is similar to or equal to the depth of the air intake chamber 216 (see...). Figure 40 The filter element 141 occupies the entire air intake chamber space (as shown in the horizontal direction), so that the air intake filter paper 1412 can have a large filtration area and allow all the air entering the air intake chamber to flow through the air intake filter paper 1412 for filtration.

[0200] The sealing ring 1411 can be made of any sealing material, such as silicone or closed-cell sponge. Thus, the filter element 141 achieves a seal through the pre-compression engagement between the sealing ring 1411 around its perimeter and the air intake chamber 216. The air intake filter paper 1412 is wavy to increase the air intake area and improve air intake efficiency.

[0201] To further improve air filtration and noise reduction, such as Figure 40 As shown, an annular sealing rib 2163 may also be provided on the second side wall 2162 of the air intake chamber 216. The sealing rib 2163 is pressed and sealed with the corresponding end face (i.e., the right end face) of the sealing ring 1411. The height of the sealing rib 2163 is preferably 0.5 mm.

[0202] like Figure 38 and Figure 40 As shown, the plurality of air intake muffler holes 214 are preferably evenly distributed on the second sidewall 2162 (e.g. Figure 38 As shown, the air intake filter paper 1412 is arranged in a square array and corresponds to the air intake filter paper 1412. That is, multiple air intake silencer holes 214 are evenly distributed within the outline of the sealing rib 2163. This allows for more uniform utilization of the filtration area of ​​the air intake filter paper 1412.

[0203] In this invention, the smaller the diameter of the intake muffler hole 214, the better the noise reduction effect. For example, the diameter of the intake muffler hole 214 can be 0.5mm-1.5mm, such as 0.8mm or 1mm. However, in order to simultaneously meet the requirements of air intake and reduce air intake resistance, the number of intake muffler holes 214 needs to be combined to achieve a reasonable total air intake area. That is to say, the total air intake area of ​​multiple intake muffler holes 214 can be determined according to the air intake volume and the air intake noise frequency to achieve a reasonable noise reduction and filtration effect. Of course, the exhaust area of ​​the exhaust port 145 (described in detail later) must also be considered to reduce the air intake resistance caused by the intake muffler holes 214. Among them, the total air intake area of ​​multiple intake muffler holes 214 can be more than 30% of the exhaust area of ​​the exhaust port 145, for example, 30%-50%.

[0204] In some embodiments, the intake assembly 14 may further include a muffler 146 and an exhaust port 145 communicating with the muffler 146. The muffler 146 is located downstream of the intake muffler hole 214 and communicates with the intake chamber 216 through the intake muffler hole 214. Gas flowing out through the intake muffler hole 214 can enter the muffler 146, further reducing noise using the reactive silencing principle. In this embodiment, the intake assembly 14 employs three levels of noise reduction: the assembly gap between the intake window cover 211 and the intake port 205 forms the first level of noise reduction, the intake muffler hole 214 forms the second level, and the muffler 146 forms the third level. The intake muffler hole 214 and the muffler 146 can also jointly form a small-hole muffler, fully utilizing the reactive silencing principle for noise reduction, while also making more uniform use of the intake filter paper's filtration area.

[0205] The silencing cavity 146 can be formed using any structure, for example... Figures 38 to 40 In the embodiment shown, the side of the second sidewall 2162 opposite to the air intake chamber 216 is provided with an outwardly protruding annular protrusion 144, and the air intake assembly 14 also includes a muffler cover 143 (e.g. Figure 38 As shown, it may include a second sidewall 2162 and a peripheral wall extending outward from one side of the second sidewall 2162. The silencing cavity cover 143 is disposed on the annular protrusion 144 and defines a silencing cavity 146 between the two. The exhaust port 145 is disposed on the annular protrusion 144 or the peripheral wall of the silencing cavity cover 143.

[0206] Furthermore, such as Figures 38 to 40 As shown, the intake assembly 14 may further include a sealing gasket 142, which is sealed between the annular protrusion 144 and the silencing chamber cover 143. This further improves the sealing performance of the intake assembly, ensuring that all air entering the intake chamber passes through the intake filter paper 1412 and enters the silencing chamber 146 through the intake silencing hole 214, thereby improving the air filtration and noise reduction effects. The silencing chamber 146 may also be filled with sound-absorbing cotton for further noise reduction.

[0207] The air intake component provided by this utility model can be applied to any device that needs to draw in air through negative pressure, so as to effectively filter the gas and reduce noise.

[0208] Specifically, such as Figures 38 to 40 As shown, the intake assembly 14 is integrated on the housing 2 and located upstream of the compressor 8.

[0209] The oxygen concentrator may also include an outlet pipe 18, one end of which is connected to the exhaust port 145 of the air intake assembly, and the other end is connected to the air intake port of the compressor 8.

[0210] During the oxygen production process, when the compressor 8 is working and drawing air, outside air can enter the intake chamber 216 through the assembly gap between the intake window cover 211 and the intake port 205. Then, it flows through the filter element 141 for filtration, enters the silencer chamber 146 through the intake silencer hole 214, then enters the exhaust pipe 18 from the exhaust port 145, and finally enters the compressor 8.

[0211] This utility model organically integrates the air intake chamber 216, air intake window cover 211, filter element 141, sealing gasket 142, and silencing chamber cover 143, making reasonable use of limited installation space. It also applies more refined small-hole silencing technology, better-sealed air filtration and silencing technology, and adds silencing chamber silencing technology. Thus, through multiple principles and multi-stage composite silencing methods, it filters out the airflow noise generated by the oxygen generation process. Due to the better sealing, it has a better air filtration effect, reducing the noise that is actually discharged outside the oxygen generator. The air drawn in by the compressor 8 is cleaner, bringing users a quieter and more comfortable "oxygen therapy" experience.

[0212] oxygen supply components

[0213] See Figures 42 to 44 The oxygen generator also includes an oxygen outlet assembly 15, which includes a throttling component 151 and an oxygen outlet pipe. The inlet end of the oxygen outlet pipe is used to connect to the oxygen supply connector 121 of the oxygen storage tank 12 of the oxygen generator, and the outlet end of the oxygen outlet pipe is used to connect to the oxygen user. The throttling component 151 is disposed between the inlet end of the oxygen outlet pipe and the oxygen supply connector 121 or disposed inside the oxygen outlet pipe and close to the oxygen supply connector 121 to adjust the oxygen flow rate of the oxygen supply connector 121.

[0214] In an oxygen generator, due to the high pressure inside the oxygen storage tank 12, the oxygen output velocity from the storage tank 12 is very high. This is detrimental to the control board 11's ability to control the opening and closing time of the pulse valve 13 on the storage tank 12. The higher the flow rate, the faster the response speed of the pulse valve 13 needs to be, requiring the use of a more expensive and faster-responding pulse valve. Moreover, the amount of oxygen output each time will fluctuate greatly. This invention connects an oxygen outlet assembly 15, including a throttling component 151, to the oxygen supply connector 121 of the storage tank 12. The throttling component 151 can reduce the oxygen flow rate of the oxygen supply connector 121, thereby making the oxygen delivered more accurate and stable each time. This allows it to be adapted to the lower-precision pulse valve 13 while still achieving a more precise effect. In addition, the oxygen outlet assembly 15, as a new solution to replace the pressure regulating valve, also has the advantages of high adaptability, simple structure, and low cost.

[0215] Of course, in order to facilitate oxygen supply to the oxygen-consuming end, the oxygen supply assembly 15 may also include an oxygen supply nozzle 1510, which is connected to the outlet end of the oxygen supply pipe.

[0216] In order to enable the oxygen outlet assembly 15 to fit into a small installation space, in some embodiments the oxygen outlet pipe is a flexible tube, such as a silicone tube.

[0217] When the oxygen outlet pipe is a flexible hose, the high-pressure gas in the oxygen storage tank 12 will vibrate or expand when it flows through the oxygen outlet hose, resulting in unstable gas flow rate. Therefore, by setting a throttling component 151 at the inlet end of the oxygen outlet pipe, the oxygen outlet flow rate is reduced to stabilize the airflow at the inlet end of the oxygen outlet pipe, thereby reducing the impact on the downstream section of the oxygen outlet pipe and the components connected to the pipe.

[0218] Furthermore, the oxygen output assembly 15 may also include a flow stabilizing component 155. The flow stabilizing component 155 may be located between the outlet end of the oxygen output tube and the oxygen outlet nozzle 1510, or located inside the oxygen output tube and close to the oxygen outlet nozzle 1510. Since the pulse oxygen generator provides pulsed oxygen supply based on human respiration, that is, oxygen is supplied when the human body inhales and not when exhaling, the flow rate will increase at the moment of inhalation and oxygen output. This will cause vibration or pipe expansion at the outlet end of the oxygen output tube, resulting in unstable gas flow rate and making it impossible to control the oxygen output as expected. By setting the flow stabilizing component 155, the flow stabilizing component 155, the oxygen output tube, and the throttling component 151 together form a device for temporarily storing oxygen. After the high-pressure gas flows through this section, it is stored and output with a delay, thereby playing a role in stabilizing the flow, making the delivered oxygen more stable and improving the user's comfort.

[0219] In this invention, the throttling component 151 and the flow stabilizing component 155 can have any suitable structure. In some embodiments, see [reference needed]. Figure 43The throttling component 151 is a cylindrical throttling bridge with a central through-hole. The diameter of the central through-hole is smaller than the diameter of the oxygen supply connector 121, thus limiting the oxygen output and pressure. See also... Figure 44 The flow stabilizing component 155 is a cylindrical flow stabilizing bridge with a central through hole. The diameter of the central through hole of the flow stabilizing component 155 is larger than the diameter of the central through hole of the throttling component 151, and / or smaller than the inner diameter of the oxygen outlet nozzle 1510. The ratio between the diameter of the throttling component 151 and the diameter of the flow stabilizing component 155 can be determined according to the required flow rate and output gas pressure.

[0220] When the oxygen outlet pipe is a flexible tube, the outer diameter of the throttling component 151 and the flow stabilizing component 155 can be larger than the inner diameter of the oxygen outlet pipe. This allows the throttling component 151 and the flow stabilizing component 155 to be directly installed inside the oxygen outlet pipe. The throttling component 151 and the flow stabilizing component 155 can be locked inside the oxygen outlet pipe to prevent them from moving under the blowing of the airflow.

[0221] In this invention, the oxygen outlet assembly 15 may further include an oxygen sensor 153. The oxygen sensor 153 is connected to the oxygen outlet pipe and located downstream of the throttling component 151. The oxygen sensor 153 can be used to monitor the flow rate and / or concentration of oxygen in the oxygen outlet pipe. Specifically, in some embodiments, there may be one oxygen sensor 153, which is used to monitor the flow rate or concentration of oxygen in the oxygen outlet pipe. In other embodiments, there may be two oxygen sensors 153, which can be used to monitor the flow rate and concentration of oxygen in the oxygen outlet pipe respectively. The oxygen sensor 153 is a highly sensitive electronic component, and unstable flow rate will affect the data output by the oxygen sensor 153. A relatively high flow rate will affect the service life of the oxygen sensor 153. This invention reduces the oxygen flow rate at the oxygen outlet of the oxygen storage tank 12 by setting the throttling component 151, and also protects the downstream oxygen sensor 153, thereby improving the service life of the oxygen sensor 153.

[0222] In this invention, the oxygen outlet tube can be composed of multiple flexible sections. Specifically, as shown... Figure 42 As shown, the oxygen outlet pipe may include a first hose 152 and a second hose 154. The inlet end of the first hose 152 is used to connect to the oxygen supply connector 121, and the outlet end of the second hose 154 is connected to the oxygen outlet nozzle 1510. The oxygen sensor 153 is connected between the outlet end of the first hose 152 and the inlet end of the second hose 154. In other words, the throttling component 151, the oxygen sensor 153, and the flow stabilizing component 155 are connected by hoses. This connection method not only allows the oxygen outlet assembly 15 to adapt to more scenarios, but also facilitates installation and maintenance, while improving work efficiency.

[0223] In this invention, the oxygen outlet assembly 15 may further include a bacterial filter 156, which can be installed on the oxygen outlet pipe to purify oxygen. Specifically, as shown... Figure 42 As shown, the bacterial filter 156 can be installed close to the throttling component 151. To facilitate maintenance and replacement of the bacterial filter 156, it is preferably detachably installed on the oxygen outlet pipe. For example, both ends of the bacterial filter 156 can be provided with pipe interfaces that can be inserted into the oxygen outlet pipe.

[0224] In this invention, the oxygen delivery component 15 may further include a breathing state sensor 159, which is connected to the oxygen delivery pipe and used to monitor the pressure difference between the air pressure inside the oxygen delivery pipe and the external atmospheric pressure. The breathing state sensor 159 can communicate with the controller of the oxygen generator. When the user inhales, the breathing state sensor 159 detects a negative pressure signal in the oxygen delivery pipe and sends the negative pressure signal to the main control board 11. The main control board 11 controls the pulse valve 13 on the oxygen storage tank 12 to open and supply oxygen based on the negative pressure signal.

[0225] In this invention, the oxygen supply component 15 may also include a pressure relief valve 158, which is connected to the oxygen supply pipe. When the pressure in the oxygen supply pipe exceeds the safe pressure value set by the pressure relief valve 158, the pressure relief valve 158 opens to discharge the high-pressure gas in the oxygen supply pipe, thereby protecting components such as the breathing status sensor 159 and the oxygen sensor 153 from high-pressure damage or abnormal accuracy.

[0226] To enable the connection between the respiratory status sensor 159 and the pressure relief valve 158 and the oxygen supply tube, and to simplify the structure and facilitate maintenance, as follows: Figure 42 As shown, the oxygen supply assembly 15 may include a four-way connector 157, which is connected to the oxygen supply tube through two of its ports, and the other two ports of the four-way connector 157 are respectively connected to the pressure relief valve 158 and the breathing status sensor 159.

[0227] The oxygen delivery component 15 provided by this utility model adopts a "throttling then stabilizing" method to provide a stable flow rate in the oxygen delivery hose. Specifically, at the oxygen delivery end of the pulse oxygen generator (from the oxygen storage tank 12 to the user end), along the direction of airflow, a throttling component 151 is first installed at the inlet end of the oxygen delivery hose. The throttling component 151 reduces the flow rate at the hose inlet end, preventing the high-pressure gas flow in the oxygen storage tank 12 from directly passing through the oxygen delivery hose. This avoids unstable gas flow rate due to hose vibration or pipeline expansion, thus making the oxygen delivered more accurate and stable each time. It also reduces the accuracy requirements of the pulse valve, allowing it to be compatible with more pulse valves. At the same time, the stable airflow rate at the beginning of the oxygen delivery hose also protects the sensor connected to the middle section of the oxygen delivery hose, preventing the sensor from being impacted by high flow rates and improving the sensor's service life. Furthermore, since pulse-type oxygen concentrators only supply oxygen when the user inhales, the flow rate increases momentarily upon oxygen release, causing instability at the outlet of the oxygen delivery tube. This solution addresses this by incorporating a flow stabilizing component 155 at the outlet of the oxygen delivery tube to ensure the stability of the flow rate and prevent excessive flow from impacting the hose. This is particularly beneficial for pulse-type oxygen concentrators with equivalent large capacities, such as 1L equivalent to 3L or 5L, or 5L equivalent to 10L. The stabilizing effect of the flow stabilizing component 155 on airflow stability during inhalation is even more pronounced when the oxygen output is high. Additionally, the flow stabilizing component 155, the oxygen delivery tube, and the throttling component 151 together form a temporary oxygen storage device. High-pressure gas passing through this section stores oxygen and delays its delivery to the user, thus buffering and stabilizing the flow, resulting in a more stable oxygen delivery and improved user comfort.

[0228] The oxygen delivery component 15 provided by this utility model organically reduces the flow rate output from the oxygen storage tank 12 within the limited space of a pulse oxygen generator. By using a relatively small throttling component 151, a flow stabilizing component 155, and a flexible hose, it not only solves the assembly problem in a confined space but also saves costs, making the delivered oxygen more precise and stable, and bringing users a more comfortable "oxygen therapy" experience.

[0229] like Figure 42In the illustrated embodiment, the oxygen delivery assembly 15 includes a throttling component 151, a bacterial filter 156, a first hose 152, an oxygen sensor 153, a second hose 154, a four-way connector 157, a pressure relief valve 158, a breathing status sensor 159, a flow stabilizing component 155, and an oxygen outlet 1510. The oxygen produced by the oxygen generator is stored in the oxygen storage tank 12. When the user inhales, the breathing status sensor 159 detects a negative pressure signal in the oxygen delivery tube and sends this signal to the main control board 11. The main control board 11 controls the pulse valve 13 on the oxygen storage tank 12 to open based on the negative pressure signal. The oxygen in the storage tank 12 flows out through the oxygen supply connector 121, first being slowed down by the throttling component 151, then passing through the bacterial filter 156 and the first hose 152 before entering the oxygen sensor 153. After passing through the oxygen sensor 153, the oxygen then flows through the second hose 154, the flow stabilizing component 155, and the oxygen outlet 1510, ultimately being delivered to the user.

[0230] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A battery-free oxygen generator, characterized in that, include: The adsorption tower (1) has oxygen outlet holes (103); An oxygen tank (12) is configured to receive and store oxygen produced by the adsorption tower (1) from the oxygen outlet (103); The control component includes a pulse valve (13) disposed at the oxygen supply end of the oxygen tank (12), the pulse valve (13) being controlled to open when the user is inhaling and close when the user is exhaling, so as to form a pulsed oxygen supply. as well as The power connection component (5) is configured to be able to connect to an external power source, which becomes the sole power source for the oxygen generator.

2. The battery-less oxygen generator as claimed in claim 1, wherein, The control component also includes a breathing state sensor, which is configured to detect the inhalation state and the exhalation state, and the pulse valve (13) switches between an open state and a closed state based on the breathing state signal detected by the breathing state sensor.

3. The battery-less oxygen generator as claimed in claim 1, wherein, The oxygen tank (12) has a slot (122) for mounting the pulse valve (13). The pulse valve (13) is mounted in the slot (122) and can control the opening and closing of the oxygen supply passage of the oxygen tank (12).

4. The battery-less oxygen generator as claimed in claim 1, wherein, The power connection assembly (5) includes a connection socket (502), a connection plug (503), a power cord (504), and a power plug (501) that are connected in sequence. The connection socket (502) is formed on the oxygen concentrator main unit, and the connection plug (503) is detachably connected to the connection socket (502).

5. The battery-less oxygen generator as claimed in claim 1, wherein, It also includes an outer shell (2) with an internal installation chamber (215) and an adsorption tower mounting frame (3) provided inside the installation chamber (215). The adsorption tower mounting frame (3) has an adsorption tower compartment (3011) for installing the adsorption tower (1) and a second disassembly port (3012) connected to the adsorption tower compartment (3011). The outer shell (2) has a first disassembly port (201) connected to the second disassembly port (3012). The adsorption tower compartment (3011), the second disassembly port (3012) and the first disassembly port (201) together form the disassembly path of the adsorption tower (1). The outer shell (2) has an adsorption tower compartment cover (4) that is detachably connected to the first disassembly port (201).

6. The battery-less oxygen generator as claimed in claim 5, wherein, The adsorption tower (1) is inserted into the adsorption tower mounting frame (3), and the adsorption tower chamber (3011) gradually extends along the insertion direction of the adsorption tower (1).

7. The battery-less oxygen generator as claimed in claim 5, wherein, When the adsorption tower (1) is placed inside the adsorption tower compartment (3011), part of the wall of the adsorption tower (1) is in contact with the side wall (3013) of the adsorption tower mounting frame (3).

8. The battery-less oxygen generator as claimed in claim 5, wherein, The adsorption tower (1) has an air inlet connector (101), and the adsorption tower mounting bracket (3) has an installation hole (3021). When the adsorption tower (1) is installed in the adsorption tower compartment (3011), the air inlet connector (101) is inserted into the installation hole (3021) in a sealed manner.

9. The battery-less oxygen generator as claimed in claim 8, wherein, The adsorption tower mounting frame (3) includes a main frame (301) and an isolation frame (302) fixed on the main frame (301). The adsorption tower chamber (3011) is formed on the main frame (301). The oxygen generator also includes a control valve (6) set on the isolation frame (302). The control valve (6) is isolated from the air inlet connector (101) through the isolation frame (302). The control valve (6) has a first working port (601). The first working port (601) is non-contactly connected to the air inlet connector (101) to control the gas to alternately enter different molecular sieves of the adsorption tower (1).

10. The battery-less oxygen generator as claimed in claim 9, wherein, The isolation frame (302) includes an isolation tube (3022) extending away from the main frame (301) and an isolation plate (3023) disposed on the isolation tube (3022). The isolation tube (3022) has an installation hole (3021) inside for the air inlet connector (101) to be inserted. The extension length of the isolation tube (3022) is greater than or equal to the extension length of the air inlet connector (101). The control valve (6) is disposed on the isolation plate (3023) and is located on opposite sides of the isolation plate (3023) from the isolation tube (3022) to form a gap between the control valve (6) and the air inlet connector (101). The isolation plate (3023) has an isolation hole (3028) coaxially connected to the isolation tube (3022). 11.The battery-free oxygen generator of claim 10, wherein, The diameter of the isolation hole (3028) is larger than the inner diameter of the isolation tube (3022). The isolation plate (3023) and the isolation tube (3022) form a stepped groove (3025) at their connection. A first sealing ring (3026) is provided in the groove (3025) to form a closed gap. The first working port (601) is coaxially connected to the mounting hole (3021) through the gap.

12. The battery-less oxygen generator as claimed in any one of claims 5 to 11, wherein, It also includes a compressor (8) connected to the adsorption tower (1), a cooling fan (10) disposed above the compressor (8) and a main control board (11). The cooling fan (10) is configured to drive the gas flow in the installation chamber (215). The outer shell (2) has an air inlet (204) for external gas to enter the installation chamber (215) and an air inlet (205) for external gas to enter the compressor (8).

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