Portable oxygen generator

Abstract

The utility model discloses a portable oxygen generator in the field of breathing equipment, which comprises a shell, a host and a battery box, the battery box is positioned at the bottom of the shell, and a convex adjusting button is arranged on the upper surface of the shell; the main machine is located in the shell and comprises a compressor, a molecular sieve tank, a control valve assembly, a main board and an oxygen storage component, the molecular sieve tank is vertically arranged above the compressor, and the projection of the molecular sieve tank on the horizontal plane is completely or partially overlapped with the compressor. According to the layout, effective separation of the top man-machine interaction layer, the middle function execution layer and the bottom power layer is formed, complex intersection of lines and pipelines is avoided, the utilization rate of the internal space is maximized, and equipment assembly is facilitated; the compressor, the molecular sieve tank and other large-size functional parts are stacked in the vertical direction instead of being transversely arranged side by side, so that the transverse size of the equipment is greatly reduced, the appearance of the whole machine can be slender, the machine conforms to human engineering, a user can hold the machine with one hand conveniently, and real portability is achieved.

Description

Technical Field

[0001] This utility model relates to the field of respiratory equipment, and more particularly to a portable oxygen concentrator. Background Technology

[0002] Currently, home oxygen concentrators mainly employ air separation technology, using molecular sieve tanks to separate oxygen and nitrogen from the air, thus obtaining a high concentration of oxygen. These devices primarily consist of components such as a compressor, molecular sieve tank, and oxygen storage tank. With the diversification of usage scenarios and increased emphasis on health, portable oxygen concentrators are becoming increasingly popular, leading to higher demands for compact and miniaturized structures. For example, Chinese patent document CN109019519B discloses a portable oxygen concentrator with two adsorption towers on either side and the remaining equipment integrated in the middle and bottom, forming a flat structure. While this horizontal arrangement allows for a thinner device, the increased width makes it inconvenient to hold and carry. The distance between the two adsorption towers is too large, the connecting device in the middle is too long, and the central space is not fully utilized. Furthermore, the assembly method between components is relatively complex. Therefore, the overall structure still has room for improvement in terms of assembly convenience and size. Utility Model Content

[0003] To overcome the shortcomings of existing oxygen concentrators, such as insufficient compactness and cumbersome assembly, the technical problem to be solved by this utility model is to provide a portable oxygen concentrator with a compact structure and convenient assembly.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A portable oxygen concentrator includes a housing, a main unit, and a battery compartment. The battery compartment is detachably connected to the bottom of the housing, providing power to the oxygen concentrator and serving as its base. The upper surface of the housing has protruding adjustment buttons. The main unit, located inside the housing, includes a compressor for drawing in and compressing air, a molecular sieve tank, a control valve assembly, a main board, and an oxygen storage component. The molecular sieve tank is vertically positioned above the compressor, and its projection on the horizontal plane completely or partially overlaps with the compressor. The housing has an air inlet connected to the compressor. The compressor's air outlet is connected to the molecular sieve tank via the control valve assembly. The oxygen outlet of the molecular sieve tank is connected to the oxygen storage component via the control valve assembly. The air outlet of the oxygen storage component is connected to an oxygen nozzle. This layout creates a clear top human-machine interface layer, effectively separating it from the middle functional execution layer (molecular sieve tank, oxygen storage component, etc.) and the bottom power layer (compressor, battery compartment, etc.). This avoids complex wiring and piping intersections, maximizes internal space utilization, and facilitates equipment assembly. In addition, by stacking the main functional components such as the compressor and molecular sieve tank vertically instead of horizontally side by side, the size of the equipment in the width and thickness directions is greatly reduced. This allows the overall shape to be made slender and ergonomic, making it easy for users to hold with one hand and achieving true portability.

[0006] By arranging large components such as the compressor and molecular sieve tank longitudinally, the lateral dimensions of the entire oxygen generator can be significantly reduced. Considering oxygen production efficiency and ease of one-handed use, the shell and battery box can be combined to form a cuboid structure. The length-width-height ratio of the cuboid structure is controlled between 2~4: 1~3: 9~11. This size range is convenient for both one-handed use and carrying in a bag.

[0007] To facilitate operation and use of the device while carried in a shoulder bag, the oxygen outlet is located on the upper surface of the housing, side by side with the adjustment buttons. During use, the oxygen tubing can be quickly inserted into the outlet, and operation is performed simultaneously via the adjacent adjustment buttons, offering convenience and speed. For easy observation and adjustment of the device's operating status during use, the adjustment buttons integrate a display screen.

[0008] A preferred embodiment of the adjustment button includes an electronic board electrically connected to the main board. A knob ring is rotatably mounted on the electronic board, with a button located in the center of the knob ring. Inside the knob ring is a support frame vertically slidably connected to the electronic board. The inner top side of the support frame abuts against the button. The display screen is located on the outer top side of the support frame. A knob ring is rotatably mounted on the outer top side of the support frame, and the knob ring is fixedly connected to the knob ring. The entire adjustment button integrates functions such as press adjustment, rotation adjustment, and display, further realizing the modularity and miniaturization of the equipment, improving assembly efficiency and structural compactness, and facilitating user operation.

[0009] To facilitate installation of the main unit within the housing, the housing includes a front shell, a rear shell, and a bracket. The front shell and rear shell are detachably connected by fasteners, and when the front and rear shells are securely connected, the movement of the bracket relative to either the front or rear shell is restricted. The compressor is mounted on the bracket. Because the compressor is relatively heavy, mounting it on an independent bracket ensures its installation stability. Furthermore, the compressor generates vibration during operation. To reduce its vibration noise and the amount of vibration transmitted to the housing, the bracket includes a lower bracket, and the compressor is connected to the lower bracket via a shock-absorbing sleeve.

[0010] The compressor generates a large amount of heat during operation. To facilitate heat dissipation, at least one set of heat dissipation holes is provided on the front or rear housing, or at the connection between the front and rear housings. Each set of heat dissipation holes includes multiple through-hole structures arranged in an array. The multiple sets of heat dissipation holes are preferably arranged opposite each other to allow gas flow to carry away the heat. To further accelerate the airflow through the heat dissipation holes, a cooling fan is provided inside the housing.

[0011] To achieve air filtration and reduce intake noise, an air inlet slot and an air inlet chamber are provided on the outer side of the bottom of the lower bracket. One end of the air inlet slot is an air inlet opening, and the other end has an air outlet on its side. Filter cotton is filled between the air inlet opening and the air outlet. A sound-absorbing chamber is provided on the inner side of the bottom of the lower bracket. One end of the sound-absorbing chamber is connected to the air outlet, and the other end is connected to the air inlet chamber through a connecting hole. By directly setting a cavity structure at the bottom of the lower bracket to serve as the air inlet slot, air inlet chamber, and sound-absorbing chamber, the number of components can be reduced, assembly efficiency can be improved, and space can also be saved.

[0012] To facilitate battery replacement, this invention employs a detachable battery compartment. The top perimeter of the battery compartment features sliding blocks, with a female electrode head at one end and a locking tongue at the other. A button on the side of the battery compartment controls the up-and-down movement of the locking tongue. The bottom of the lower bracket has a fixing hole and a slot that can slidably engage with the sliding blocks. When the battery compartment and lower bracket are engaged, the locking tongue extends into the fixing hole, restricting the battery compartment's movement relative to the lower bracket. The side of the bracket also features a circuit board electrically connected to the main board. The lower end of the circuit board has a male electrode head that passes through the lower bracket and connects to the female electrode head. A gap is left between the battery compartment and the bottom of the lower bracket to allow air to enter the air intake slot.

[0013] The beneficial effects of this utility model are:

[0014] 1. By arranging components such as battery box, compressor, molecular sieve tank and adjustment buttons in a layered manner in the vertical space, a clear top human-machine interaction layer is formed, which is effectively separated from the functional execution layer such as molecular sieve tank and oxygen storage component in the middle, and the power layer such as compressor and battery box at the bottom. This avoids complex intersections of lines and pipes, maximizes the utilization of internal space, and facilitates installation and assembly.

[0015] 2. By stacking the main functional components such as the compressor and molecular sieve tank vertically instead of horizontally side by side, the size of the equipment in the width and thickness directions is greatly reduced. This allows the overall shape to be made slender and ergonomic, making it easy for users to hold with one hand and achieving true portability.

[0016] 3. The top surface of the casing is the most visible and accessible area of ​​the device. Whether the device is placed on a desktop, on the ground, or held in the hand, users can operate it directly without searching for it, such as turning it on and off or adjusting the flow rate. It is especially suitable for portable scenarios where it is "used in a handbag". Users do not need to take the device out; they can simply touch the raised knob on the top for blind operation, which greatly enhances the practicality and convenience of portable use. Attached Figure Description

[0017] Figure 1 This is an exploded view of the overall structure of this utility model;

[0018] Figure 2 This is an exploded view of the bracket of this utility model;

[0019] Figure 3 This is an exploded view of the front of the main unit of this utility model;

[0020] Figure 4 This is an exploded view of the back of the main unit of this utility model;

[0021] Figure 5 This is a cross-sectional view of the main unit of this utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the outer side of the bottom of the lower support of this utility model;

[0023] Figure 7 This is a schematic diagram of the structure of the inner side of the bottom of the lower support of this utility model;

[0024] Figure 8 This is a cross-sectional view of the adjustment button of this utility model;

[0025] Figure 9 This is a cross-sectional view of the battery box of this utility model.

[0026] The components in the diagram are labeled as follows: 1-House, 2-Main unit, 3-Compressor, 4-Molecular sieve tank, 5-Oxygen storage component, 6-Two-position four-way solenoid valve, 7-Balance valve, 8-Main board, 9-Battery box, 11-Front shell, 12-Rear shell, 13-Decorative strip, 14-Ventilation plate, 20-Bracket, 21-Upper bracket, 22-Connecting plate, 23-Lower bracket, 24-Adjustment button, 25-Fixing plate, 26-Pulse solenoid valve, 27-Oxygen outlet nozzle, 28-Fan, 29-Circuit board, 31-Shock absorber sleeve, 32-Hollow screw, 61-Air inlet, 62-Working port, 63-Nitrogen discharge port, 64-Nitrogen discharge silencer, 71-Balance valve nozzle, 81-Pressure sensor, 82-Oxygen concentration sensor, 83-Respiration sensor, 91-Sliding block. 92-Electrode female head, 93-Lock tongue, 94-Button, 211-Arc-shaped groove, 212-Air tank groove, 213-Connecting post, 214-Spring piece, 215-Screw post, 231-Air inlet groove, 232-Air inlet chamber, 233-Mounting hole, 234-Silencer chamber, 235-Connecting hole, 236-Slot, 237-Fixing hole, 238-Air inlet chamber cover, 239-Silencer chamber cover, 241-Electronic board, 242-Knob ring, 243-Button, 244-Support bracket, 245-Display screen, 246-Knob ring, 247-Transparent cover, 291-Electrode male head, 2311-Air inlet opening, 2312-Air outlet, 2313-Filter cotton, 2314-Air inlet groove cover, 2341-Guide rib plate. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] It should be noted that if this utility model contains directional indicators such as up, down, left, right, front, and back, these are for describing the relative positional relationships between components and are not specific references to the absolute positions of the components or the relationships between them. They are only used to explain the relative positional relationships and movement of the components in a specific posture. If the specific posture changes, the directional indicator will also change accordingly. The term "connection" appears multiple times in the following text, referring to a sealed connection via a pipe.

[0029] like Figure 1 , Figure 2As shown, the portable oxygen concentrator provided by this utility model includes a housing 1, a main unit 2, and a battery box 9. The battery box 9 is detachably connected to the bottom of the housing 1 and is used to power the oxygen concentrator and serve as the base of the oxygen concentrator. The upper surface of the housing 1 is provided with a protruding adjustment button 24. The main unit 2 is located inside the housing 1 and includes a compressor 3 for inhaling and compressing air, a molecular sieve tank 4, a control valve assembly, a main board 8, and an oxygen storage component 5 for storing oxygen. The molecular sieve tank 4 is vertically arranged above the compressor 3, and its projection on the horizontal plane completely or partially overlaps with the compressor 3. The housing 1 has an air inlet communicating with the compressor 3. The air outlet of the compressor 3 is connected to the molecular sieve tank 4 through the control valve assembly. The oxygen outlet of the molecular sieve tank 4 is connected to the oxygen storage component 5 through the control valve assembly. The air outlet of the oxygen storage component 5 is connected to the oxygen outlet nozzle 27. The complete or partial overlap of the projections of the molecular sieve tank 4 and the compressor 3 on the horizontal plane refers to the situation where, when the oxygen generator is placed on a horizontal plane with the battery box 9 as its base, the projections of the molecular sieve tank 4 and the compressor 3 onto the horizontal plane in a direction perpendicular to the horizontal plane completely or partially overlap. The control valve assembly includes an intake assembly and an oxygen outlet assembly, which can be an integrated structure or two independent structures. For example, the intake assembly uses a two-position four-way solenoid valve 6 to connect the compressor 3 to the two molecular sieve tanks 4, enabling alternating intake and exhaust of nitrogen from the two molecular sieve tanks 4. The exhaust assembly uses a balance valve 7 to deliver oxygen-enriched gas from the molecular sieve tanks 4 into the oxygen storage component 5. The oxygen storage component 5 can be an independent tank structure, a bag-like structure, or a cavity structure set within the housing 1, etc.

[0030] The working process of this utility model is as follows: the compressor 3 draws in air through the air inlet on the housing 1, compresses it, and sends it into the molecular sieve tank 4. The molecular sieve tank 4 adsorbs nitrogen and sends the remaining oxygen-enriched gas to the oxygen storage component 5 for storage, and then outputs it through the oxygen outlet 27. Compared with existing oxygen generators, this utility model places the heavier battery box 9 and compressor 3 at the bottom as a base, which can lower the center of gravity of the equipment and improve the stability of the equipment. The oxygen-generating functional components such as the molecular sieve tank 4, oxygen storage component 5, and main board 8 are placed in the middle of the housing 1, and the adjustment button 24 is placed at the top of the housing 1. This can form a clear top human-machine interaction layer in the vertical space, effectively separating it from the middle functional execution layer and the bottom power layer, avoiding complex intersections of wires and pipes, maximizing the utilization of internal space, and facilitating assembly. Stacking the large main functional components such as the compressor 3 and molecular sieve tank 4 vertically, rather than horizontally side by side, greatly reduces the size of the equipment in the width and thickness directions, allowing the overall shape to be slender and ergonomic, easy for users to hold with one hand, and achieving true portability. The adjustment button 24 is located on the top of the device, which is the most visible and accessible area. This makes it particularly suitable for portable scenarios where the device is placed in a handbag. Users can operate it blindly by simply touching the raised knob on the top without taking the device out, which greatly enhances the practicality and convenience of portable use.

[0031] By arranging large components such as the compressor 3 and molecular sieve tank 4 longitudinally, the overall lateral dimensions of the oxygen generator are significantly reduced. Considering oxygen production efficiency and ease of one-handed operation, the housing 1 and battery box 9 can be combined to form a cuboid structure. The length-width-height ratio of this cuboid structure is controlled between 2~4:1~3:9~11, and the edges can be rounded. This size range is convenient for both one-handed use and carrying in a shoulder bag, and the internal space is sufficient to accommodate the compressor 3 and molecular sieve tank 4 with adequate oxygen production capacity. For convenient operation and use while carrying the device in a shoulder bag, it is best to place the oxygen outlet 27 on the upper surface of the housing 1, side by side with the adjustment button 24. During use, the oxygen tube can be quickly inserted into the oxygen outlet 27, and operation can be performed simultaneously using the adjacent adjustment button 24, which is convenient and quick. To facilitate observation and adjustment of the device's operating status during use, the adjustment button 24 is preferably integrated with a display screen.

[0032] To facilitate the installation of the main unit 2 within the housing 1, the housing 1 includes a front housing 11, a rear housing 12, and a bracket 20. The front housing 11 and the rear housing 12 are detachably connected by fasteners, and when the front housing 11 and the rear housing 12 are fastened together, the movement of the bracket 20 relative to the front housing 11 or the rear housing 12 is restricted. The compressor 3 is mounted on the bracket 20. Specifically, as shown... Figure 2As shown, the bracket 20 includes an upper bracket 21, a connecting plate 22, and a lower bracket 23 assembled from top to bottom. The upper and lower ends of the compressor 3 are fixed to the connecting plate 22 and the lower bracket 23, respectively. Two arc-shaped grooves 211 are vertically arranged side by side on the front of the upper bracket 21, and two molecular sieve tanks 4 are respectively installed in the two arc-shaped grooves 211. A gas tank groove 212 is provided on the back of the upper bracket 21, and the oxygen storage component 5 is installed in the gas tank groove 212. The main board 8 is installed on the back of the upper bracket 21 and located on one side of the gas tank groove 212. The two-position four-way solenoid valve 6 of the control valve assembly is located in the lower half of the back of the upper bracket 21. The balance valve 7 and the adjustment button 24 are located on the top of the upper bracket 21. The entire bracket 20 is fixed in the housing 1 by screws.

[0033] like Figure 2 As shown, the upper support 21, connecting plate 22, and lower support 23 are connected by screws. The lower support 23 includes a base plate and two side plates. The connecting plate 22 is located between the tops of the two side plates, ensuring the structural strength of the entire lower support 23 so that it can support the compressor 3 and the upper support 21. The two arc-shaped grooves 211 are preferably arranged vertically side-by-side, meaning the axes of both arc-shaped grooves 211 are vertical. The two arc-shaped grooves 211 on the upper support 21 are used to place the molecular sieve tank 4. This facilitates the positioning and installation of the molecular sieve tank 4 and increases the bending resistance of the upper support 21, improving its vertical support strength. The upper support 21 serves as the mounting base for most components and also acts as a separator and positioning element for each component. It fully utilizes the vertical and width space, making the structure of each component compact and clearly distinguishing the functional areas, which is beneficial for improving the efficiency and accuracy of equipment assembly.

[0034] Regarding the installation method of molecular sieve tank 4 and oxygen storage component 5, such as Figure 3 , Figure 4 As shown, the upper support 21 is also equipped with a fixing plate 25. Connecting posts 213 are provided at the adjacent portions of the two arc-shaped grooves 211 on the front side of the upper support 21. The fixing plate 25 is installed on the connecting posts 213 with screws, pressing and fixing the two molecular sieve tanks 4 within the arc-shaped grooves 211. Spring tabs 214 are provided on both sides of the opening of the gas tank trough 212. The oxygen storage component 5 is pressed and fixed within the gas tank trough 212 by the spring tabs 214. The two sides of the fixing plate 25 can be configured with an arc-shaped structure matching the molecular sieve tanks 4, thereby reducing the size of the fixing plate 25 and improving the fixing effect of the molecular sieve tanks 4. The oxygen storage component 5 is usually small, and four to six spring tabs 214 are sufficient for its fixing function.

[0035] like Figure 4 , Figure 5As shown, the two-position four-way solenoid valve 6 is mounted on the screw post 215 on the back of the upper bracket 21 by screws. The two-position four-way solenoid valve 6 includes an air inlet 61, two working ports 62, and a nitrogen discharge port 63. The air inlet 61 is connected to the air outlet of the compressor 3, the two working ports 62 are respectively connected to the air inlet ends of the two molecular sieve tanks 4, and the nitrogen discharge port 63 is connected to the nitrogen discharge silencer 64 on the connecting plate 22. During equipment operation, the air supply time between the two molecular sieve tanks 4 and the compressor 3 and the nitrogen discharge silencer 64 are controlled by controlling the on / off time of the two-position four-way solenoid valve 6, thereby achieving the purpose of producing high-concentration oxygen.

[0036] like Figure 4 As shown, the balancing valve 7 is mounted on the upper bracket 21 above the gas tank 212 by screws. The inlet end of the balancing valve 7 is connected to the outlet ends of the two molecular sieve tanks 4. The outlet end of the balancing valve 7 is equipped with a balancing valve nozzle 71, which is connected to the inlet end of the oxygen storage component 5. The balancing valve 7 contains two one-way valves and one balancing solenoid valve. The two one-way valves correspond to the two molecular sieve tanks 4 and are used to achieve unidirectional flow of oxygen with a pressure difference. The balancing solenoid valve is used to open the two molecular sieve tanks 4 to promote nitrogen removal.

[0037] like Figure 4 As shown, a pulse solenoid valve 26 is also provided on the back of the upper bracket 21, and an oxygen outlet 27 is located on the top of the upper bracket 21. The main board 8 is also equipped with a pressure sensor 81, an oxygen concentration sensor 82, and a breathing sensor 83. The two outlets of the oxygen storage component 5 are respectively connected to the inlet ends of the pressure sensor 81 and the pulse solenoid valve 26, and the two outlets of the pulse solenoid valve 26 are respectively connected to the inlet ends of the oxygen concentration sensor 82 and the breathing sensor 83. The outlet end of the oxygen concentration sensor 82 is connected to the oxygen outlet 27. The pulse solenoid valve 26 is used to control the direction and speed of gas flow. Working in conjunction with the breathing sensor 83, it can control the pulse supply of oxygen by detecting pressure differences based on changes in human breathing frequency, thereby improving oxygen utilization. The pressure sensor 81 is used to detect the pressure in the oxygen storage component 5 to prevent it from bursting. The oxygen concentration sensor 82 is used to detect the oxygen concentration and works in conjunction with the oxygen concentration set by the adjustment button 24 to achieve feedback control.

[0038] Regarding the structure of the adjustment button 24, the preferred embodiment adopted in this utility model is as follows: Figure 8As shown, the adjustment button 24 includes an electronic board 241 electrically connected to the main board 8. A knob ring 242 is rotatably mounted on the electronic board 241, and a button 243 is located in the center of the knob ring 242. A support frame 244, vertically slidably connected to the electronic board 241, is also located inside the knob ring 242. The inner top side of the support frame 244 abuts against the button 243, and a display screen 245 is located on the outer top side of the support frame 244. A knob ring 246 is rotatably mounted on the outer top side of the support frame 244, and the knob ring 246 is fixedly connected to the knob ring 242. The adjustment button 24 can activate the button 243 by pressing the display screen 245, thereby starting or stopping the device. Rotating the knob ring 246 rotates the knob ring 242, achieving functions such as adjusting the oxygen concentration. The display screen 245 can display the device's operating status and data information. To protect the display screen 245, a transparent cover plate 247 can be installed on top of the support frame 244 to shield and protect the display screen 245.

[0039] Because the compressor 3 vibrates during operation, to reduce its vibration noise and the amount of vibration transmitted to the housing 1, the compressor 3 is connected to the connecting plate 22 and the lower support 23 via a shock-absorbing sleeve 31. The bottom of the lower support 23 has a connected air inlet groove 231 and an air inlet chamber 232, and the top of the air inlet chamber 232 has a mounting hole 233. The shock-absorbing sleeve 31 at the lower end of the compressor 3 is placed in the mounting hole 233. The lower end of the compressor 3 is connected to the shock-absorbing sleeve 31 by a hollow screw 32, which connects the air inlet chamber 232 to the air inlet channel of the compressor 3. The air outlet of the compressor 3 is connected to the air inlet 61 of the two-position four-way solenoid valve 6. To ensure installation stability, it is best to install at least two shock-absorbing sleeves 31 at each of the upper and lower ends of the compressor 3. The compressor 3 generates high-frequency vibration during operation, and the shock-absorbing sleeves 31 can buffer and dampen it, reducing the vibration and noise of the entire device. The air intake slot 231 is connected to the outside atmosphere. Air is collected in the air intake chamber 232 and then enters the compressor 3 through the hollow screw 32. The hollow screw 32 and the shock-absorbing sleeve 31 are used to fix the compressor 3 and enable air intake, which simplifies the connection and air intake structure and reduces the overall structural size of the compressor 3.

[0040] The specific structure of the air intake slot 231 and the air intake chamber 232 is as follows: Figure 5 , Figure 6 , Figure 7As shown, the air intake groove 231 and air intake cavity 232 are located on the outer bottom of the lower support 23. One end of the air intake groove 231 is an air intake opening 2311, and the other end has an air outlet 2312 on its side. Filter cotton 2313 is filled between the air intake opening 2311 and the air outlet 2312. The inner bottom of the lower support 23 has a silencing cavity 234. One end of the silencing cavity 234 is connected to the air outlet 2312, and the other end is connected to the air intake cavity 232 through a connecting hole 235. The air intake groove 231 and air intake cavity 232 are concave structures located on the outer bottom of the lower support 23, and form a cavity structure through the air intake groove cover plate 2314 and the air intake cavity cover plate 238, respectively. The silencing cavity 234 is a protruding structure located on the inner side of the bottom of the lower support 23, forming a cavity structure through the silencing cavity cover plate 239. The air intake cavity 232 and the silencing cavity 234 are staggered, and the connecting hole 235 is located on the staggered surface of the two to achieve communication between them. Positioning the air intake cavity 232 and the silencing cavity 234 on the inner and outer sides of the bottom of the lower support 23 saves space and reduces the need for other components. Sound-absorbing cotton can be installed inside the silencing cavity 234 for sound insulation, or some guide ribs 2341 can be installed to increase the gas flow path, causing the gas to continuously reflect and gradually attenuate within the channel, and changing the speed and direction of the airflow, effectively suppressing turbulence and vibration noise generated during gas flow.

[0041] In addition, the compressor generates a large amount of heat during operation. To facilitate heat dissipation, at least one set of heat dissipation holes is provided on the front housing 11 or the rear housing 12, or at the connection between the front housing 11 and the rear housing 12. Each set of heat dissipation holes includes multiple through-hole structures arranged in an array. The multiple sets of heat dissipation holes are preferably arranged opposite each other to allow gas flow to carry away the heat. Specifically, such as... Figure 1 As shown, decorative strips 13 are provided on the front shell 11 and rear shell 12 at positions corresponding to the internal connecting plate 22. A fan 28 is provided on one side of the lower bracket 23. Ventilation plates 14 are provided on two sides of the front shell 11 and rear shell 12 opposite to the airflow direction of the fan 28, and heat dissipation holes are provided on the ventilation plates 14. The decorative strips 13 and ventilation plates 14 are installed on the front shell 11 and rear shell 12 by snap-fit. The decorative strips 13 on the shell 1 can distinguish the compressor 3 from other components and remind the user not to hold the part where the compressor 3 is located. Inside the shell 1, the connecting plate 22 isolates the compressor 3 from other components, forming an independent chamber, which can reduce the upward transfer of heat from the compressor 3 to other components. At the same time, ventilation plates 14 are provided on both sides of the chamber where the compressor 3 is located, and the fan 28 is provided in the chamber to ensure that air flows from one ventilation plate 14 to the other ventilation plate 14, thereby improving the heat dissipation effect of the compressor 3. To facilitate the installation of the ventilation panels 14, two ventilation panels 14 can be set on the surfaces where the front shell 11 and the rear shell 12 are spliced ​​together, so that the ventilation panels 14 can be fixed by splicing the two, and the fan 28 can also be arranged more conveniently.

[0042] To improve convenience, this utility model adopts a replaceable battery solution, specifically as follows: Figure 1 , Figure 4 , Figure 6 , Figure 9 As shown, the battery box 9 has a sliding block 91 around its top perimeter. One end of the top of the battery box 9 has a female electrode head 92, and the other end has a locking tongue 93. The side of the battery box 9 has a button 94 for controlling the up-and-down movement of the locking tongue 93. The bottom of the lower bracket 23 has a fixing hole 237 and a slot 236 that can slide and engage with the sliding block 91. When the battery box 9 and the lower bracket 23 are engaged, the locking tongue 93 can extend into the fixing hole 237, restricting the sliding of the battery box 9 relative to the lower bracket 23. The side of the bracket 20 also has a circuit board 29 electrically connected to the main board 8. The lower end of the circuit board 29 has a male electrode head 291 that passes through the lower bracket 23 and can connect to the female electrode head 92. Multiple sliding blocks 91 and slots 236 can be provided to ensure connection stability. The latch 93 can be directly controlled up and down via button 94, or a spring can be installed at the end of the latch 93 inside the battery compartment 9, allowing the latch 93 to be exposed upwards in its natural state. A limiting structure is also provided at the top of the battery compartment 9 to prevent the latch 93 from sliding out. Button 94 slides against the side of the latch 93 via an inclined surface; pressing button 94 drives the latch 93 downwards, thus achieving extension and retraction of the latch 93. Furthermore, since the air inlet 231 is located at the bottom of the lower bracket 23, to prevent it from being obstructed after the battery compartment 9 is installed, the height of the sliding block 91 can be controlled so that after the sliding block 91 engages with the slot 236, a gap remains between the upper surface of the battery compartment 9 and the bottom of the lower bracket 23, allowing air to enter the air inlet 231 through this gap.

Claims

1. A portable oxygen generator, comprising a shell (1), a main machine (2) and a battery box (9), characterized in that: the battery box (9) is detachably connected to the bottom of the shell (1), used for supplying power to the oxygen generator and serving as the base of the oxygen generator; the upper surface of the shell (1) is provided with a protruding adjusting button (24); the main machine (2) is located in the shell (1) and comprises a compressor (3) for inhaling and compressing air, a molecular sieve tank (4), a control valve assembly, a main board (8) and an oxygen storage component (5) for storing oxygen, the molecular sieve tank (4) is vertically arranged above the compressor (3), and the projection of the molecular sieve tank (4) on the horizontal plane completely or partially overlaps the compressor (3); the shell (1) has an air inlet communicating with the compressor (3), the air outlet of the compressor (3) is connected with the molecular sieve tank (4) through the control valve assembly, the oxygen outlet of the molecular sieve tank (4) is connected with the oxygen storage component (5) through the control valve assembly, and the air outlet of the oxygen storage component (5) is connected with an oxygen outlet nozzle (27). The shell (1) and the battery box (9) combine to form a cuboid structure, and the length-width-height ratio of the cuboid structure is 2-4: 1-3: 9-11.

2. The portable oxygen generator of claim 1, wherein: The oxygen outlet nozzle (27) is located on the upper surface of the shell (1).

3. The portable oxygen generator of claim 1, wherein: The adjusting button (24) is integrated with a display screen (245).

4. The portable oxygen generator of claim 1, wherein: The adjusting button (24) comprises an electronic board (241) electrically connected with the main board (8), a rotary knob ring (242) rotatably arranged on the electronic board (241), a key (243) arranged in the middle of the rotary knob ring (242), a support frame (244) vertically slidably connected with the electronic board (241) and further arranged in the rotary knob ring (242), the inner side of the top of the support frame (244) abuts against the key (243), the display screen (245) is arranged on the outer side of the top of the support frame (244), a rotary knob ring (246) is rotatably arranged on the periphery of the top of the support frame (244), and the rotary knob ring (246) is fixedly connected with the rotary knob ring (242).

5. The portable oxygen generator of claim 4, wherein: The shell (1) comprises a front shell (11), a rear shell (12) and a bracket (20), the front shell (11) and the rear shell (12) are detachably connected by fasteners, and when the front shell (11) and the rear shell (12) are fastened, the movement of the bracket (20) relative to the front shell (11) or the rear shell (12) is limited, and the compressor (3) is mounted on the bracket (20).

6. The portable oxygen generator of claim 1, wherein: The bracket (20) comprises a lower bracket (23), and the compressor (3) is connected to the lower bracket (23) through a damping sleeve (31).

7. The portable oxygen generator of claim 6, wherein: At least one group of heat dissipation holes is arranged on the front shell (11) or the rear shell (12) or the connection between the front shell (11) and the rear shell (12), and each group of heat dissipation holes comprises a plurality of through hole structures arranged in an array.

8. The portable oxygen generator of claim 6, wherein: A fan (28) is arranged in the shell (1) to accelerate the airflow of the heat dissipation holes.

9. The portable oxygen generator of claim 8, wherein: ​ 10. The portable oxygen generator of claim 7, wherein: The bottom outer side of the lower support (23) is provided with an air inlet groove (231) and an air inlet cavity (232), one end of the air inlet groove (231) is an air inlet opening (2311), the side surface of the other end is provided with an air outlet hole (2312), the air inlet opening (2311) and the air outlet hole (2312) are filled with filter cotton (2313), the bottom inner side of the lower support (23) is provided with a sound attenuation cavity (234), one end of the sound attenuation cavity (234) is communicated with the air outlet hole (2312), the other end is communicated with the air inlet cavity (232) through a connecting hole (235).

11. The portable oxygen generator of claim 7, wherein: The top periphery of the battery box (9) is provided with a sliding clamping block (91), one end of the top of the battery box (9) is provided with an electrode female head (92), the other end is provided with a lock tongue (93), the side surface of the battery box (9) is provided with a button (94) for controlling the up and down movement of the lock tongue (93), the bottom of the lower support (23) is provided with a fixing hole (237) and a clamping groove (236) which can be slidably clamped with the sliding clamping block (91), after the battery box (9) and the lower support (23) are clamped in place, the lock tongue (93) can extend into the fixing hole (237) to limit the sliding of the battery box (9) relative to the lower support (23), the side surface of the support (20) is further provided with a circuit board (29) which is electrically connected with the main board (8), the lower end of the circuit board (29) is provided with an electrode male head (291) which penetrates the lower support (23) and can be connected with the electrode female head (92).

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