Handheld portable oxygen generator

Abstract

The present invention relates to a handheld portable oxygen generator, which comprises a body, the size of which is suitable for one-handed use, an oxygen inhalation nozzle, a power supply assembly, and an oxygen generation and storage assembly, which is arranged inside the body. The body comprises a top surface portion and a bottom surface portion opposite each other in the direction of the height thereof, and a side surface portion connected to the top surface portion and the bottom surface portion. The oxygen generation and storage assembly comprises a compressed air source assembly, a molecular sieve canister, a molecular-sieve air intake assembly, an oxygen storage assembly, an air output assembly, and a control board, wherein the molecular sieve canister is vertically arranged above the compressed air source assembly, the projection contour of the molecular sieve canister on a first projection plane completely or partially overlaps with the projection contour of the compressed air source assembly on the first projection plane, and the first projection plane is a plane perpendicular to the direction of the height of the body. The oxygen inhalation nozzle is arranged on the top surface portion of the body, and is in communication with the air output assembly; and the oxygen inhalation nozzle is configured to be brought into contact with the nose or mouth to guide oxygen. The power supply assembly is arranged on the bottom surface portion of the body, is used for supplying power to the handheld portable oxygen generator, and serves as a base of the handheld portable oxygen generator.

Description

Handheld portable oxygen concentrator Technical Field

[0001] This invention relates to the field of oxygen concentrators, and more particularly to a handheld portable oxygen concentrator. Background Technology

[0002] Portable oxygen concentrators, due to their lightweight design and stable battery life, have become essential equipment for high-altitude travel, outdoor activities, and routine medical needs. Existing portable oxygen concentrators are generally pulse-type, requiring the use of a nasal cannula to connect the concentrator's outlet to the user's nose. After the concentrator is turned on, it continuously produces and supplies oxygen based on the user's breathing feedback.

[0003] However, existing nasal cannulas are generally over 1 meter long, which severely hinders movement and can even pose safety risks. Meanwhile, the design limitations of existing portable oxygen concentrators make them difficult to hold and move directly to the nostrils for oxygen delivery, hindering handheld use. Furthermore, the lack of a direct contact method between the oxygen outlet and the mouth or nose makes intermittent oxygen use cumbersome. The need to wear the nasal cannulas before each use creates a complicated and inconvenient process, sometimes even leading to serious accidents due to delayed oxygen delivery. In conclusion, existing portable oxygen concentrators fail to provide rapid oxygen delivery. Summary of the Invention

[0004] In view of this, the present invention provides a handheld portable oxygen concentrator to solve the problems of existing handheld portable oxygen concentrators.

[0005] To achieve one, some, or all of the above objectives, or other objectives, the present invention proposes:

[0006] A handheld portable oxygen concentrator, comprising:

[0007] A body size suitable for one-handed use;

[0008] The body includes a top part and a bottom part opposite to each other in its height direction, and a side part connecting the top part and the bottom part;

[0009] An oxygen generation and storage component is installed inside the machine body. The oxygen generation and storage component includes a compressed air source component, a molecular sieve tank, a molecular sieve air inlet component, an oxygen storage component, an air outlet component, and a control board.

[0010] The molecular sieve tank is vertically arranged above the compressed air source assembly. The projected outline of the molecular sieve tank on the first projection plane completely overlaps or partially overlaps with the projected outline of the compressed air source assembly on the first projection plane. The first projection plane is a plane perpendicular to the height direction of the machine body.

[0011] The compressed air source assembly can deliver compressed air to the molecular sieve tank through the molecular sieve inlet assembly. The molecular sieve tank prepares oxygen-enriched gas and delivers it to the oxygen storage assembly. The oxygen storage assembly can deliver oxygen-enriched gas to the outside through the outlet assembly.

[0012] An oxygen inhalation nozzle is located on the top surface of the machine body and is connected to the air outlet assembly. The oxygen inhalation nozzle is used to contact the nose or mouth to deliver oxygen.

[0013] A power supply assembly is located on the bottom of the device body, used to supply power to the handheld portable oxygen concentrator and to serve as the base of the handheld portable oxygen concentrator.

[0014] In some embodiments, both the top surface and the bottom surface have a maximum width dimension in the height direction perpendicular to the body, and the distance between the top surface and the bottom surface is greater than the maximum width dimension of either the top surface or the bottom surface.

[0015] In some embodiments, the perimeter of the projected outline of the body on the first projection surface is no greater than 270 mm, so as to allow for one-handed gripping.

[0016] In some embodiments, the perimeter of the projected outline of the body on the first projection plane ranges from 144 mm to 270 mm.

[0017] In some embodiments, the distance between the two furthest points of the projected outline of the body on the first projection plane is less than 100 mm.

[0018] In some embodiments, the control panel is used to control the opening and closing of the air outlet assembly; the control panel is integrated with a button, which is at least partially exposed on the side of the body; when the button is triggered, the oxygen-enriched gas in the oxygen storage assembly flows to the oxygen inhalation nozzle through the air outlet assembly.

[0019] In some embodiments, the device further includes a top cover connected to the top surface of the body, wherein the oxygen inhalation nozzle is located within a cavity enclosed by the top cover and the top surface;

[0020] When the top cover is opened, the oxygen-enriched gas in the oxygen storage assembly can flow to the oxygen inhalation nozzle through the gas outlet assembly.

[0021] In some embodiments, the control board is used to control the opening and closing of the air outlet assembly; the handheld portable oxygen concentrator further includes a sensing unit electrically connected to the control board, the sensing unit being used to detect and acquire a signal that the top cover is opened or closed from the body; when the sensing unit detects a signal that the top cover is opened from the body, the oxygen-enriched gas in the oxygen storage assembly flows to the oxygen inhalation nozzle through the air outlet assembly; when the sensing unit detects a signal that the top cover is closed from the body, the oxygen-enriched gas in the oxygen storage assembly cannot flow to the oxygen inhalation nozzle through the air outlet assembly.

[0022] In some embodiments, a backup pressurized gas tank is also included, which is used to connect the molecular sieve tank and the oxygen storage component, and the oxygen-enriched gas prepared by the molecular sieve tank is transported to the oxygen storage component through the backup pressurized gas tank.

[0023] In some embodiments, the oxygen storage assembly includes an oxygen storage tank for storing oxygen-enriched gas, and a pressurized gas tank is disposed inside the oxygen storage tank and communicates with the oxygen storage tank.

[0024] In some embodiments, the air outlet assembly includes an upper air duct plate, a pulse solenoid valve disposed on the upper air duct plate, an oxygen outlet solenoid valve, and a pressure equalization solenoid valve; wherein,

[0025] The upper air duct plate integrates a delivery channel and an oxygen outlet channel. The delivery channel is used to connect the molecular sieve tank and the oxygen storage component, and the oxygen outlet channel is used to connect the oxygen storage component and the oxygen inhalation nozzle.

[0026] The pulse solenoid valve is connected to the delivery channel and is used to deliver the oxygen-enriched gas prepared by the molecular sieve tank to the oxygen storage component.

[0027] The oxygen outlet solenoid valve is connected to the oxygen outlet channel and is used to export the oxygen-enriched gas stored in the oxygen storage component to the oxygen inhalation nozzle.

[0028] The molecular sieve tanks include multiple containers, and the pressure equalization solenoid valve is used to connect the multiple molecular sieve tanks.

[0029] In some embodiments, the upper airway plate has a longitudinal axis extending along its thickness direction and passing through its center, and the pulse solenoid valve, oxygen outlet solenoid valve and pressure equalization solenoid valve are arranged at intervals around the longitudinal axis.

[0030] In some embodiments, in the height direction of the body, the air outlet assembly is located above the molecular sieve tank and the oxygen storage assembly, and the molecular sieve air inlet assembly is located below the molecular sieve tank.

[0031] In some embodiments, the oxygen inhalation nozzle includes a cover, an oxygen inhalation part disposed on the cover, and an oxygen supply tube; the cover is disposed on the top part of the body; the oxygen supply tube is disposed inside the cover and connects the oxygen inhalation part and the air outlet assembly; the oxygen inhalation part is used to contact the nose or mouth to deliver oxygen.

[0032] In some embodiments, the oxygen mouthpiece is any one of a nasal cannula, a breathing mask, a mouthpiece oxygen inhaler, a nasal mask oxygen inhaler, or a jet oxygen supply interface.

[0033] Implementing the embodiments of the present invention will have the following beneficial effects:

[0034] I. By establishing a linkage between the opening and closing of the top cover and oxygen supply, the entire device is designed for single-handed use. When the handheld oxygen concentrator is held and moved to the oxygen inhalation area, the top cover is detected to indicate it is open, initiating oxygen supply. Once the inhalation area touches the mouthpiece, oxygen inhalation begins. The entire process can be operated with one hand, making the portable oxygen concentrator convenient to use immediately. Conversely, when the handheld oxygen concentrator is removed, the top cover closes simultaneously, stopping oxygen supply. Thus, while ensuring effective oxygen supply, it achieves rapid oxygen supply and quick separation between the oxygen concentrator and the user, greatly improving ease of use, especially suitable for intermittent oxygen use scenarios with short-duration but frequent oxygen supply.

[0035] Second, by setting up a backup pressure tank, the oxygen storage tank can obtain high-pressure, high-concentration oxygen. In continuous oxygen supply mode, the backup pressure of the backup pressure tank allows the molecular sieve tank to continuously produce oxygen-enriched gas normally; at the same time, it meets the requirement of increasing the pressure of the oxygen-enriched gas in the oxygen storage tank to meet the oxygen injection flow rate requirements in the oxygen injection mode. In case of an emergency where users need a large amount of high-concentration oxygen in a short period of time, oxygen injection can be successfully achieved, effectively ensuring the user's urgent oxygen needs.

[0036] Third, by making the inner diameter of the main airway of the oxygen inhalation nozzle larger than that of the branch tube, the oxygen discharged from the outlet of the branch tube will be ejected in a clear jet shape along the direction of the outlet, and will present a high oxygen concentration. Users only need to place their mouth or nose in the direction of the oxygen jet to conveniently obtain high concentration of oxygen, thereby achieving rapid oxygen inhalation.

[0037] Fourth, by limiting the part of the handheld portable oxygen concentrator that is held during use, the device is suitable for one-handed use. Users can pick up the device with one hand and bring it close to their mouth or nose, aligning the oxygen inhalation part on the top of the device with their mouth or nose, and then start using oxygen. The entire process from needing oxygen to actually using oxygen eliminates the cumbersome process of wearing traditional nasal cannulas, conveniently achieving quick one-handed oxygen use.

[0038] This invention is particularly suitable for intermittent oxygen use scenarios where the oxygen supply duration is short but the oxygen supply frequency is high. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 is a schematic diagram of the overall structure of a handheld portable oxygen concentrator in some embodiments;

[0041] Figure 2 is a schematic diagram of the overall structure of a handheld portable oxygen concentrator in some embodiments;

[0042] Figure 3 is a schematic diagram of the structural separation of a handheld portable oxygen concentrator in some embodiments;

[0043] Figure 4 is a schematic diagram of the structural separation of a handheld portable oxygen concentrator in some embodiments;

[0044] Figure 5 is a schematic diagram of the structural separation of the oxygen inhalation nozzle in some embodiments;

[0045] Figure 6 is a perspective cross-sectional view of the oxygen inhalation nozzle in some embodiments;

[0046] Figure 7 is a schematic diagram of the air outlet assembly in some embodiments;

[0047] Figure 8 is a bottom view of the air outlet assembly in some embodiments;

[0048] Figure 9 is a front view of the air outlet assembly in some embodiments;

[0049] Figure 10 is a cross-sectional view of AA in Figure 9;

[0050] Figure 11 is a cross-sectional view of BB in Figure 9;

[0051] Figure 12 is the CC cross-sectional view in Figure 9;

[0052] Figure 13 is a bottom view of the valve support in some embodiments;

[0053] Figure 14 is a schematic diagram of the compressed air source assembly and air intake assembly in some embodiments;

[0054] Figure 15 is a bottom view of the air intake assembly in some embodiments;

[0055] Figure 16 is a cross-sectional view of DD in Figure 15;

[0056] Figure 17 is a cross-sectional view of EE in Figure 15;

[0057] Figure 18 is a schematic diagram showing the relationship between the body diameter, the corresponding oxygen storage tank volume, and the blood oxygen concentration when the body circumference ranges from 144 mm to 270 mm in some embodiments.

[0058] Wherein: X1-Oxygen generating and storage assembly; 1-Main body; 10-Front shell; 11-Rear shell; 12-Control board; 120-First electrical connector; 13-Sensing unit; 14-Top part; 15-Bottom part; 16-Side part; 17-Button; 2-Compressed air source assembly; 20-Support frame; 201-Base plate; 2010-Filter chamber; 2011-Inlet grille; 2013-Lower support column; 202-Top plate; 2023-Upper support column; 21-Compressed air source; 30-Molecular sieve tank; 4-Oxygen storage assembly; 4a-Oxygen storage tank; 40-Connection port; 42-Gift space; 43-Arc-shaped groove; 44-Reserve pressurized air tank; 5-Outlet assembly; 50-Upper air duct plate; 50a-Longitudinal axis; 500-Conveying channel; 501-One-way valve; 502-Oxygen inlet channel; 503-Oxygen outlet channel; 504-Oxygen inlet interface; 505-Oxygen outlet interface; 5050-Outlet pipe; 506-Oxygen outlet; 507-Detection air duct; 5070-Detection port; 508-Connecting hole; 51-Pulse solenoid valve; 52-Oxygen outlet solenoid valve; 53-Equalizing solenoid valve; 54-Upper positioning skirt; 55-Valve bracket; 550-Connecting hole; 551-First sidewall; 5511-First channel; 5512-Second channel; 552 - Second sidewall; 5523- Third channel; 5524- Fourth channel; 553- Third sidewall; 5535- Fifth channel; 5536- Sixth channel; 554- First corner; 5540- Oxygen inlet hole; 555- Second corner; 5550- Oxygen outlet hole; 556- Third corner; 5561- First pressure equalization hole; 5562- Second pressure equalization hole; 56- Upper sealing plate; 570- Oxygen inlet; 571- Air inlet hole; 572- Air outlet hole; 573- First oxygen channel; 574- Second oxygen channel; 575- First pressure equalization channel; 576- Second pressure equalization channel; 6-Oxygen nozzle; 60-Mask body; 600-Positioning boss; 601-Balancing air hole; 61-Oxygen intake section; 610-Oxygen inlet; 62-Oxygen supply tube; 620-Main air tube; 6200-Connection port; 621-Branch tube; 6210-Tube clip; 7-Power supply assembly; 70-Second electrical connector; 80-Top cover; 800-Cover body; 801-Connecting part; 8010-Spindle structure; 8011-Spindle spring; 802-Locking part; 81-Switch assembly; 810-Snap-on button; 811-Snap-on pivot; 812-Snap-on spring; 9-Intake assembly; 90-Lower air duct plate; 900-Intake passage; 901-Connecting passage; 902-Exhaust passage; 903-Intake port; 904-Exhaust port; 905-Outlet port; 906-Air guide hole; 91-First solenoid valve; 92-Second solenoid valve; 921-First valve body passage; 922-Second valve body passage; 923-Third valve body passage; 93-Lower sealing plate; D-Inner diameter of main air pipe; d-Inner diameter of branch pipe; L-Maximum width of top or bottom section; H-Distance between top and bottom sections. Detailed Implementation

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings are used to distinguish different objects and not to describe a particular order.

[0060] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0061] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0062] Referring to Figures 1-18, the present invention proposes a handheld portable oxygen concentrator, which includes a body 1 of a size suitable for single-handed use, an oxygen inhalation nozzle 6, a power supply assembly 7, and an oxygen generation and storage assembly X1 disposed inside the body 1; the body 1 includes a top portion 14 and a bottom portion 15 opposite to each other in its height direction, and a side portion 16 connecting the top portion 14 and the bottom portion 15; the oxygen generation and storage assembly X1 includes a compressed air source assembly 2, a molecular sieve tank 30, a molecular sieve inlet assembly 9, an oxygen storage assembly 4, an outlet assembly 5, and a control board 12; the molecular sieve tank 30 is vertically disposed above the compressed air source assembly 2, and the projected outline of the molecular sieve tank 30 on the first projection plane is the same as that of the compressed air source assembly 2 on the first projection plane. The projected outlines completely or partially overlap, and the first projection surface is a plane perpendicular to the height direction of the body 1; the compressed air source component 2 can deliver compressed air to the molecular sieve tank 30 through the molecular sieve inlet component 9, the molecular sieve tank 30 prepares oxygen-enriched gas and delivers it to the oxygen storage component 4, and the oxygen storage component 4 can deliver oxygen-enriched gas to the outside through the outlet component 5; the control board 12 is used to control the opening and closing of the outlet component 5 and the molecular sieve inlet component 9; the oxygen inhalation nozzle 6 is located on the top part 14 of the body 1 and is connected to the outlet component 5. The oxygen inhalation nozzle 6 is used to contact the nose or mouth to conduct oxygen; the power supply component 7 is located on the bottom part 15 of the body 1 and is used to power the handheld portable oxygen generator and serve as the base of the handheld portable oxygen generator.

[0063] Specifically, the main body 1 includes a front shell 10 and a rear shell 11, which are fastened together to form an internal mounting cavity. This fastening connection between the front shell 10 and the rear shell 11 facilitates the installation of the internal oxygen generation and storage component X1, optimizing the assembly process of this handheld portable oxygen concentrator. A top portion 14 is formed at one end of the main body 1 along its height, and a bottom portion 15 is formed at the other end, along with a side portion 16 connecting the top portion 14 and the bottom portion 15. The top portion 14 is used to install the oxygen nozzle 6, allowing users to easily inhale oxygen through the nozzle. The bottom portion 15 is used to install the power supply component 7, which, while supplying power to the internal functional modules, also serves as the base of the entire handheld portable oxygen concentrator. When the handheld portable oxygen concentrator is placed on a flat surface such as a table, the compressed air source component 2 is raised away from the table, preventing the compressed air source component 2 from being damaged. The air inlet is blocked, while the side portion 16 facilitates the user's grip on the unit 1 for oxygen inhalation. In designing the unit 1, to facilitate subsequent use, the user can hold the unit 1 with one hand. A plane perpendicular to the height direction of the unit 1 is defined as the first projection plane, which is the horizontal plane when the unit 1 is placed vertically. Simultaneously, the perimeter of the projected outline of the unit 1 on the first projection plane is limited to no more than 270mm, thus limiting the perimeter of the side portion 16 to no more than 270mm. When the perimeter of the projected outline of the unit 1 does not exceed 270mm, it ensures that the unit 1 meets the ergonomic requirements for finger and palm grip, allowing for a stable grip with one hand. Combined with the unit 1's structure suitable for one-handed use, this enables the user to hold the portable oxygen concentrator with one hand. By limiting the size of the handheld portable oxygen concentrator body 1 when it is held, the body 1 is made suitable for stable one-handed use. The user can pick up the body 1 with one hand and bring it close to their mouth or nose, and align the oxygen inhalation nozzle 6 with the user's mouth or nose to start using oxygen. The entire process from needing oxygen to using oxygen eliminates the cumbersome wearing process of traditional nasal oxygen cannulas, and conveniently achieves quick one-handed oxygen use.

[0064] The oxygen generation and storage assembly X1 includes a compressed air source assembly 2, a molecular sieve tank 30, a molecular sieve air inlet assembly 9, an oxygen storage assembly 4, an air outlet assembly 5, and a control panel 12. The compressed gas source assembly 2, located at the bottom of the body 1, generates pressurized gas and introduces it into the molecular sieve canister 30 via the molecular sieve inlet assembly 9. The molecular sieve canister 30 processes the incoming gas to produce oxygen and delivers the oxygen-enriched gas to the oxygen storage assembly 4 for temporary storage. The molecular sieve canister 30 is placed vertically inside the body 1, above the compressed gas source assembly 2, which effectively shortens the gas path between the molecular sieve canister 30 and the compressed gas source assembly 2, improving the oxygen production efficiency of the molecular sieve canister 30. The projection outline of the molecular sieve canister 30 on the first projection plane completely or partially overlaps with the projection outline of the compressed gas source assembly 2 on the first projection plane. In this embodiment, it is preferable that the projection outline of the molecular sieve canister 30 on the first projection plane completely overlaps with the projection outline of the compressed gas source assembly 2 on the first projection plane, so that the molecular sieve canister 30 extends along the height direction of the body 1. The molecular sieve canister 30 and the compressed gas source assembly 2 are arranged in a vertical stacked layout, which does not occupy the lateral space of the body 1, which is conducive to minimizing the lateral size of the body 1, making the body 1 as a long and slender cup shape, which is easy to hold.

[0065] To maximize the utilization of the internal space of the body 1, the gas outlet component 5 can be distributed above the molecular sieve tank 30, and the oxygen storage component 4 can be located between the compressed gas source component 2 and the gas outlet component 5. In terms of height, the molecular sieve tank 30 and the oxygen storage component 4 are at the same height, and the two are connected to each other through the internal air passage of the gas outlet component 5 above, thereby shortening the gas path between the molecular sieve tank 30 and the oxygen storage component 4, and avoiding cross-connection between the two through pipes or pipelines. In order to further shorten the length of the gas path between the molecular sieve tank 30 and the compressed gas source component 2, the molecular sieve air inlet component 9 can be arranged below the molecular sieve tank 30 and installed above the compressed gas source component 2, so that the compressed gas generated by the compressed gas source component 2 directly enters the internal air passage of the molecular sieve air inlet component 9 through the upper air outlet, and is then introduced into the molecular sieve tank 30 for oxygen production. In summary, the oxygen generation and storage component X1 adopts a vertical stacking layout inside the body 1, so that the compressed air source component 2, the molecular sieve air inlet component 9, the molecular sieve tank 30, and the air outlet component 5 are distributed sequentially from bottom to top along the height direction of the body 1, forming a clear power layer, oxygen generation and storage layer, and air outlet layer. This layout avoids complex intersections of lines and pipes, maximizes the utilization of the internal space of the body 1, facilitates assembly, and minimizes the lateral dimension of the body 1 by stacking the oxygen generation and storage component X1. The overall shape of the body 1 is slender and cup-shaped, making it easy to hold.

[0066] The oxygen nozzle 6 is located on the top part 14 of the body 1. The oxygen inhalation part 61 can be directly attached to the user's nose or mouth without the need for an additional external oxygen inhalation tube. This reduces the problems of hose hanging, tangling, or inconvenience in wearing traditional oxygen inhalation equipment, making the oxygen inhalation process more direct, simple, and convenient, and greatly improving the user experience.

[0067] The power supply assembly 7 is located on the bottom part 15 of the body 1, providing stable operating power to the various structures inside the body 1. The power supply assembly 7 also serves as the base of the handheld portable oxygen concentrator, providing support when placed vertically. Specifically, the power supply assembly 7 is electrically connected to the control board 12, which in turn is electrically connected to the various structures inside the body 1 to complete power distribution. The control board 12 is also used to control the opening and closing of the molecular sieve air inlet assembly 9, thus controlling the flow of compressed gas from the compressed gas source assembly 2. The oxygen is regularly introduced into the molecular sieve tank 30 through the molecular sieve inlet component 9, so that the molecular sieve tank 30 produces oxygen and removes nitrogen according to a predetermined pattern. The control board 12 is also used to control the opening and closing of the outlet component 5. The user can trigger the integrated switch structure or other sensor-triggered switch structure on the control board 12 to open the air passage connecting the oxygen storage component 4 and the oxygen inhalation nozzle 6 inside the outlet component 5, so that the oxygen-enriched gas stored in the oxygen storage component 4 can be discharged to the oxygen inhalation nozzle 6 through the outlet component 5 for the user to inhale oxygen through the oxygen inhalation nozzle 6.

[0068] In summary, this handheld portable oxygen concentrator arranges the compressed air source component 2, molecular sieve air inlet component 9, oxygen storage component 4 and molecular sieve tank 30, air outlet component 5, and oxygen nozzle 6 sequentially along the height of the body 1, making efficient use of internal space and significantly improving the compactness of the oxygen concentrator. Compared with traditional horizontal arrangements or complex hose connections, this invention reduces the internal air path connection distance and structural intersections, improves oxygen production efficiency and installation stability, and makes the overall size of the handheld portable oxygen concentrator smaller, which is beneficial for carrying and use. The oxygen nozzle 6, located on the top surface 14 of the body 1, allows users to directly place the oxygen nozzle 6 against their nose or mouth for oxygen inhalation without connecting to an external oxygen hose, greatly improving the user experience.

[0069] Referring to Figure 3, in some embodiments, the top surface 14 and the bottom surface 15 have a maximum width dimension L in the height direction perpendicular to the body 1, and the distance H between the top surface 14 and the bottom surface 15 is greater than the maximum width dimension L of the top surface 14 or the bottom surface 15.

[0070] Specifically, by limiting the height dimension of the body 1 (the distance H between the top part 14 and the bottom part 15) to be greater than its maximum lateral width dimension (the maximum width dimension L of the top part 14 or the bottom part 15), the overall shape of the body 1 is made visually and in terms of grip posture closer to a cup shape, that is, it has a more obvious longitudinal extension feature relative to the lateral width. When the top part 14 or the bottom part 15 is circular, its width dimension is the diameter. This shape can provide users with a grip length that is more in line with the palm and fingers, making it easier for users to find a stable grip position when holding it with one hand, making it convenient for users to hold the body 1 for oxygen inhalation. Preferably, the side part 16 can be designed with a curved contour that is easy to grip or has an anti-slip structure to further improve the stability and comfort of one-handed grip.

[0071] Furthermore, since the top part 14 is used to install the oxygen nozzle 6, which is located in the upper part of the body 1, when the user holds the body 1 with one hand, the cup-shaped shape of the body 1 naturally positions the top part 14 close to the user's face. The user does not need to adjust the grip angle, making it easier to align and approach the oxygen nozzle 6 to the user's nose or mouth, thus making the oxygen inhalation process more convenient and ergonomic. Through the above-mentioned dimensional design, while ensuring the compactness of the body 1, the ease of one-handed holding of the handheld portable oxygen concentrator and the natural alignment of the oxygen nozzle 6 are further improved, enhancing the overall user experience.

[0072] In some embodiments, the perimeter of the projected outline of the body 1 on its first projection plane is no greater than 270 mm. Specifically, in designing the body 1, to facilitate subsequent use and allow the user to hold the body 1 with one hand, the plane perpendicular to the height direction of the body 1 is defined as the first projection plane, which is also the horizontal plane when the body 1 is placed vertically. At the same time, the perimeter of the projected outline of the body 1 on the first projection plane is limited to no more than 270 mm. When the perimeter of the projected outline of the body 1 is no more than 270 mm, it can be ensured that the body 1 meets the ergonomic requirements for finger and palm grip, that is, the body 1 can be firmly gripped with one hand in a holding posture. At the same time, with the body 1 having a structure suitable for one-handed use, the user can achieve one-handed gripping of the handheld portable oxygen concentrator.

[0073] While reducing the size of the device 1 improves ease of one-handed use, it also reduces the oxygen concentrator's oxygen supply capacity. When the oxygen supply capacity of the handheld portable oxygen concentrator falls below a certain level, its effect on improving the user's blood oxygen concentration becomes insignificant. Therefore, there is a trade-off between the ease of one-handed use and the oxygen supply capacity of the oxygen concentrator, requiring a trade-off and balance in the design. To achieve this balance, the perimeter of the projected outline of the device 1 on the first projection plane is limited to 144mm to 270mm. Taking the cylindrical form of the device 1 as an example, Figure 18 illustrates the relationship between the diameter of the device 1, the corresponding volume of the oxygen storage tank 4, and the blood oxygen concentration. It is clear that when the cylindrical device 1 has a perimeter ranging from 144mm to 270mm, it achieves good oxygen supply capacity. The oxygen-enriched gas stored in the oxygen storage tank 4 can quickly increase the user's blood oxygen concentration, helping the user quickly improve hypoxia symptoms. After the user finishes inhaling the stored oxygen, the oxygen concentrator prepares oxygen-enriched gas through the molecular sieve tank 30 and stores it in the oxygen storage tank 4 for future use. It can also continuously supply oxygen to help the user maintain blood oxygen concentration. It should be noted that when the circumference of the cylindrical body 1 is less than 144mm, the oxygen concentrator can still provide oxygen, but its oxygen supply capacity is reduced, making it difficult to quickly increase blood oxygen concentration. Therefore, the circumference of the projected outline of the body 1 on the first projection plane is limited to the range of 144mm-270mm, balancing the size for single-handed use and the oxygen supply capacity of the oxygen concentrator. Of course, the possibility of further reducing the size while sacrificing the oxygen supply capacity cannot be ruled out, but it should also be within the scope of technical solutions readily conceivable in this embodiment.

[0074] To prevent issues such as difficulty finding the right grip angle or instability when holding the device with one hand due to its excessively thick or long shape, ergonomic principles are applied. The distance between the two furthest points of the projected outline of the device on the first projection plane is limited to less than 100mm to ensure stability and comfort when holding the device with one hand. Preferably, the cross-sectional shape of the device 1 is circular, elliptical, rectangular, or polygonal. When the cross-sectional shape of the device 1 is circular, the distance between the two furthest points of the projected outline of the device 1 on the first projection plane corresponds to the diameter of the cross-sectional shape. The outer wall of the device 1 can be optimized. For example, ergonomically, curved surfaces can be designed on the outer wall to facilitate one-handed grip, or anti-slip protrusions can be designed to conform to the fingers and palm and prevent the device 1 from slipping when held with one hand. This results in a structure suitable for one-handed use, improving stability and comfort.

[0075] Referring to Figures 3, 4, and 7-13, in some embodiments, the air outlet assembly 5 includes an upper air duct plate 50, a conveying channel 500 disposed inside the upper air duct plate 50, and an oxygen outlet channel 503. The upper air duct plate 50 has a plate-like structure. The conveying channel 500 and the oxygen outlet channel 503 are isolated from each other. The conveying channel 500 is used to connect the molecular sieve tank 30 and the oxygen storage assembly 4, and the oxygen outlet channel 503 is used to connect the oxygen storage assembly 4 and the oxygen inhalation nozzle 6.

[0076] Specifically, the upper air duct plate 50 has a plate-like structure, forming an oxygen delivery channel 500 and an oxygen outlet channel 503. These two channels are isolated from each other to avoid interference between different gas flow paths. One-way valves can be installed in the delivery channel 500 and the oxygen outlet channel 503 to control the opening and closing of the corresponding channels. The plate-like structure allows the upper air duct plate 50 to serve as a common upper support for the molecular sieve tank 30 and the oxygen storage component 4, while also acting as an integrated gas path base for vertical oxygen delivery from the oxygen generation area to the oxygen storage area and then to the oxygen inhalation nozzle 6. For example, an oxygen outlet 506 connected to the oxygen outlet channel 503 can be provided on the upper air duct plate 50, and the oxygen outlet 506 is connected to the oxygen inhalation nozzle 6. Because the air path is directly integrated inside the plate, compared to the traditional air path using multiple flexible hoses, the upper air duct plate 50 reduces the number of internal hoses and wiring complexity, further reducing the internal space occupied by the machine body 1 and making the overall layout more organized. The plate-like structure facilitates the formation of a stable contact interface with the oxygen storage component 4 and the molecular sieve tank 30, which is beneficial to the overall sealing performance and structural stability. Simultaneously, the planar characteristics of the plate-like structure make it easy to stack with other internal components of the machine body 1 in the height direction, thereby improving the overall compactness of the machine layout. The air outlet component 5 uses an upper air duct plate 50 to integrate the delivery channel 500 and the oxygen outlet channel 503, replacing the traditional hose connection, resulting in a shorter and more stable air path. The upper air duct plate 50, as the core air path base, simplifies assembly and improves sealing.

[0077] Referring to Figures 3, 4, and 14, in some embodiments, the compressed air source assembly 2 includes a support frame 20 and a compressed air source 21 disposed within the support frame 20, and a molecular sieve inlet assembly 9 is disposed on the top of the support frame 20; the molecular sieve tank 30 and the oxygen storage assembly 4 are disposed adjacent to each other, both arranged between the support frame 20 and the upper air duct plate 50; wherein, the bottom of the molecular sieve tank 30 is connected to and communicates with the molecular sieve inlet assembly 9, and the top of the molecular sieve tank 30 is connected to the upper air duct plate 50 and communicates with one end of the conveying channel 500; the bottom of the oxygen storage assembly 4 is connected to the support frame 20, and the top of the oxygen storage assembly 4 is connected to the upper air duct plate 50 and communicates with the other end of the conveying channel 500.

[0078] Specifically, the support frame 20 is located inside the body 1 near the bottom surface 15, serving as the foundation for the compressed air source 21, the molecular sieve inlet assembly 9, the molecular sieve tank 30, and the oxygen storage assembly 4. The compressed air source 21 is installed inside the support frame 20. The molecular sieve inlet assembly 9 is located at the top of the support frame 20 and communicates with the compressed air source 21. The molecular sieve inlet assembly 9 is directly attached to the bottom of the molecular sieve tank 30 and communicates with it, allowing the compressed gas to be directly introduced into the molecular sieve tank 30 along the height direction. The molecular sieve tank 30 and the oxygen storage assembly 4 are both located in the space between the support frame 20 and the upper air duct plate 50, and are adjacent to each other along the height direction, allowing them to form a compact arrangement in the central area inside the body 1. Since the top of the molecular sieve tank 30 is connected to the upper air duct plate 50, and the oxygen storage component 4 is also connected to the upper air duct plate 50 through its top, the air path from the molecular sieve tank 30 to the oxygen storage component 4 and then to the oxygen nozzle 6 is formed inside the upper air duct plate 50. This eliminates the need for additional bent hoses or long-distance connectors. The internal structure of the upper air duct plate 50 significantly shortens the airflow path, reducing the space occupied by air path crossings and hose entanglements in traditional equipment, and achieving overall miniaturization while maintaining unobstructed oxygen production paths. The oxygen storage component 4 is located in the middle of the body 1, which facilitates full utilization of the internal space. Its volume can be expanded as needed, allowing for the storage of more oxygen and improved output stability. Furthermore, the molecular sieve tank 30 and the oxygen storage component 4 are arranged adjacent to each other, allowing multiple molecular sieve tanks 30 to be arranged within the width limits of the body 1, maintaining high oxygen production efficiency while reducing overall volume.

[0079] Referring to Figures 3, 4, 7, 8, and 9, in some embodiments, the handheld portable oxygen generator further includes a pressurized gas tank 44. The pressurized gas tank 44 connects the molecular sieve tank 30 and the oxygen storage component 4. The oxygen-enriched gas prepared in the molecular sieve tank 30 is transported to the oxygen storage component 4 through the pressurized gas tank 44. Specifically, the pressurized gas tank 44 serves as a pressure buffer chamber, ensuring that the oxygen-enriched gas prepared in the molecular sieve tank 30 has sufficient pressure to enter the oxygen storage component 4. Furthermore, the pressurized gas tank 44 balances the gas pressure inside the molecular sieve tank 30 and the oxygen storage component 4, preventing a decrease in internal pressure in the molecular sieve tank 30 due to the discharge of oxygen-enriched gas. This ensures that the internal pressure of the molecular sieve tank 30 remains constant while discharging oxygen-enriched gas, allowing for continuous oxygen production and improving oxygen production efficiency.

[0080] In some embodiments, the oxygen storage assembly 4 includes an oxygen storage tank 4a for storing oxygen-enriched gas; a pressurized gas tank 44 is located inside the oxygen storage tank 4a, the top of the pressurized gas tank 44 is connected to the upper air duct plate 50 and communicates with the delivery channel 500, and the molecular sieve tank 30 is connected to the oxygen storage tank 4a through the pressurized gas tank 44.

[0081] Specifically, the pressure tank 44 is located inside the oxygen storage tank 4a, and its top is connected to the upper air duct plate 50 to communicate with the delivery channel 500, allowing the oxygen-enriched gas discharged from the molecular sieve tank 30 to enter the oxygen storage tank 4a via the pressure tank 44. As an oxygen buffer chamber, the pressure tank 44 can equalize and stabilize the pressure of the oxygen-enriched gas during the oxygen production cycle, maintaining the oxygen pressure in the oxygen storage tank 4a within a more stable range, thus facilitating continuous and stable oxygen supply from the oxygen nozzle 6. Placing the pressure tank 44 inside the oxygen storage tank 4a avoids occupying the lateral space of the machine body 1, preventing an increase in the overall width or cross-sectional area due to the addition of auxiliary chambers, and contributing to the overall miniaturized structure. Furthermore, the internal arrangement allows for a more direct connection between the pressure tank 44 and the oxygen storage tank 4a, reducing the number of connecting parts and improving the compactness of the gas path. In other embodiments, to adapt to different layout requirements or different structural forms of oxygen storage tank 4a, the backup pressurized gas tank 44 can also be set outside the oxygen storage tank 4a and connected to the delivery channel 500 and the oxygen storage tank 4a through a pipeline to meet the design requirements of different oxygen generators. In other embodiments, the oxygen storage component 4 can also be an oxygen storage pipe, an oxygen storage chamber integrally formed on the inner wall of the body 1, or an oxygen storage chamber integrally formed on the bottom surface of the upper air duct plate 50. The present invention does not impose a unique limitation on the form of the oxygen storage component 4.

[0082] Referring to Figures 7-13, in some embodiments, the gas outlet assembly 5 further includes a pulse solenoid valve 51, an oxygen outlet solenoid valve 52, and a pressure equalization solenoid valve 53 disposed on the upper air duct plate 50. The pulse solenoid valve 51, the oxygen outlet solenoid valve 52, and the pressure equalization solenoid valve 53 are all arranged on the side of the upper air duct plate 50 away from the molecular sieve tank 30. The pulse solenoid valve 51 is connected to the delivery channel 500 and is used to deliver the oxygen-enriched gas prepared from the molecular sieve tank 30 to the oxygen storage assembly 4. The oxygen outlet solenoid valve 52 is connected to the oxygen outlet channel 503 and is used to export the oxygen-enriched gas stored in the oxygen storage assembly 4 to the oxygen inhalation nozzle 6. The molecular sieve tank 30 includes multiple units, and the pressure equalization solenoid valve 53 is used to connect multiple molecular sieve tanks 30.

[0083] Specifically, taking oxygen storage component 4, specifically oxygen storage tank 4a, as an example, the pulse solenoid valve 51, oxygen outlet solenoid valve 52, and pressure equalization solenoid valve 53 correspond to different control requirements in the oxygen generation, oxygen supply, and nitrogen removal processes, respectively. The pulse solenoid valve 51 controls the rhythm of oxygen entering oxygen storage tank 4a from molecular sieve tank 30, making the oxygen generation cycle more stable. The oxygen outlet solenoid valve 52 adjusts the timing and flow rate of oxygen output from oxygen storage tank 4a to oxygen inhalation nozzle 6. For configurations with multiple molecular sieve tanks 30, the pressure equalization solenoid valve 53 connects the gas paths between different molecular sieve tanks 30 to achieve nitrogen emission and pressure equalization during operation. All three solenoid valves are arranged on the side of the upper air duct plate 50 away from the molecular sieve tanks 30, i.e., on the top surface of the upper air duct plate 50, so that they do not occupy the vertical installation space between the lower part of the upper air duct plate 50 and the support frame 20. Since this space is typically used to install molecular sieve tanks 30 and oxygen storage tanks 4a, moving the solenoid valve to the upper position effectively releases the core functional area inside the machine body 1. This allows the number of molecular sieve tanks 30 to be increased as needed, and the oxygen storage tank 4a to be designed with a larger volume, thereby improving the overall oxygen production and storage capacity of the equipment within a limited volume. Furthermore, the solenoid valve is directly mounted on the upper air duct plate 50 and connected to its internal delivery channel 500 or oxygen outlet channel 503, making the air path more concentrated and compact, reducing the need for additional hoses or adapters, further reducing air path losses, and improving the utilization rate of internal space.

[0084] As shown in Figure 7, the upper air duct plate 50 has a longitudinal axis 50a extending along its thickness and passing through its center. The pulse solenoid valve 51, oxygen outlet solenoid valve 52, and pressure equalization solenoid valve 53 are arranged at intervals around the longitudinal axis 50a. Specifically, the pulse solenoid valve 51, oxygen outlet solenoid valve 52, and pressure equalization solenoid valve 53 are arranged in an equilateral triangle on the upper air duct plate 50, which is suitable for bodies 1 with circular or triangular cross-sections, making the overall structure compact. It also fully utilizes the thickness space of the upper air duct plate 50 to integrate the air duct structure internally, achieving the air duct arrangement for oxygen inlet and outlet of the oxygen storage tank 4a and pressure equalization of the molecular sieve tank 30. Furthermore, arranging the three solenoid valves together facilitates wiring layout, avoids wiring confusion, improves maintenance convenience, and allows the integrated solenoid valves to form unit modules, achieving integrated assembly.

[0085] Referring to Figures 4 and 14, in some embodiments, the compressed air source assembly 2 includes a support frame 20 and a compressed air source 21 disposed within the support frame 20. The support frame 20 is installed inside the body 1, and the bottom of the support frame 20 forms the bottom part 15 of the body 1. The handheld portable oxygen concentrator also includes a control board 12 disposed within the body 1. The control board 12 is vertically arranged along the height direction of the body 1, with one end close to the oxygen inhalation part 61 and the other end provided with a first electrical connector 120 and connected to the bottom of the support frame 20. The first electrical connector 120 is at least partially exposed outside the body 1. The power supply assembly 7 is detachably installed at the bottom of the support frame 20 and is provided with a second electrical connector 70 that can be connected to the first electrical connector 120.

[0086] Specifically, the main body 1 has a tubular structure with through openings at both the front and rear ends, allowing the internal space to extend longitudinally. This facilitates the stacking of functional modules along the height. The support frame 20 is fixedly installed at the bottom of the main body 1, with its bottom surface directly forming the bottom boundary of the main body 1, ensuring a stable, enclosed bottom structure while maintaining the tubular shape. The support frame 20 has a hollow structure, housing a compressed air source 21, such as a miniature compressed air source 21. This allows the compressed air source 21 to be centrally installed in the bottom area of ​​the main body 1, reducing the equipment's center of gravity and improving layout compactness. The control board 12 is vertically arranged along the height of the body 1 and located near the inner wall of the body 1. The upper end of the control board 12 extends near the oxygen inhalation section 61, and the lower end of the control board 12 is provided with a first electrical connector 120 and connected to the bottom of the support frame 20. This allows the control board 12 to serve as the electrical control center of the entire machine, enabling electrical or pneumatic connections with functional modules such as the compressed gas source assembly 2, molecular sieve tank 30, oxygen storage tank 4a, and solenoid valves (multiple pneumatic sensors can be installed on the control board 12). The first electrical connector 120 is partially exposed in the bottom area of ​​the body 1 for quick connection with the power supply assembly 7. The power supply assembly 7 is detachably installed at the bottom of the support frame 20 and connects to the first electrical connector 120 via a second electrical connector 70 to provide power to the entire machine. The detachable structure allows users to directly remove the power supply assembly 7 for charging or battery pack replacement without opening the outer casing of the body 1, improving ease of use. In other embodiments, the power supply assembly 7 can also adopt a non-detachable built-in design and supply power to the device via a charging interface to meet the needs of different product forms.

[0087] Referring to Figures 1-6, in some embodiments, the oxygen inhalation nozzle 6 includes a cover 60, an oxygen inhalation part 61 disposed on the cover 60, and an oxygen supply pipe 62; the cover 60 is disposed on the top part 14 of the body 1; the oxygen supply pipe 62 is disposed inside the cover 60 and connects the oxygen inhalation part 61 and the air outlet assembly 5; the oxygen inhalation part 61 is used to contact the nose or mouth to deliver oxygen.

[0088] Specifically, the cover 60 covers the top part 14 of the body 1, and the oxygen supply pipe 62 is located inside the cover 60. The oxygen supply pipe 62 is a hollow oxygen delivery pipe, with one end connected to the oxygen inhalation part 61 and the other end connected to the air outlet component 5, so that oxygen from the oxygen storage tank 4a is delivered to the oxygen inhalation part 61 through the air outlet component 5, and oxygen is delivered to the user's mouth or nose through the oxygen inhalation part 61. The oxygen inhalation part 61 is specifically located at the top of the cover 60. In actual use, the oxygen inhalation part 61 at the top of the cover 60 is brought into contact with the user's nose or mouth to deliver oxygen. When not in use, it is directly separated and integrated into the handheld oxygen concentrator, so that the oxygen inhalation nozzle 6 can be moved to the oxygen inhalation part 61 while holding it with one hand, so as to achieve a convenient and readily available usage mode.

[0089] Referring to FIG6, in some embodiments, the oxygen inhalation unit 61 includes two; the oxygen supply pipe 62 includes a main air pipe 620 for connecting the air outlet assembly 5, and at least two branch pipes 621 extending to the two oxygen inhalation units 61 respectively; the inner diameter D of the main air pipe 620 is greater than the inner diameter d of the branch pipes 621.

[0090] Specifically, the main airway 620 is connected to the air outlet assembly 5. Two branch pipes 621 are symmetrically arranged on both sides of the main airway 620 along its axis, with the axes of the branch pipes 621 intersecting the axis of the main airway 620 at an oblique angle, ultimately forming a Y-shape with the main airway 620. During real-time oxygen administration, oxygen enters the main airway 620 from the oxygen storage tank 4a through the air outlet assembly 5, and is then evenly distributed to the branch pipes 621 on both sides of the main airway 620. As shown in Figure 6, the inner diameter D of the main airway 620 is larger than the inner diameter d of the branch pipes 621. This increases the oxygen pressure after entering the branch pipes 621 from the main airway 620, thereby increasing the flow rate of oxygen ejected from the outlet ports at the ends of the branch pipes 621. This allows the user to increase their oxygen intake in a short time, rapidly raising their blood oxygen saturation level. Preferably, to ensure the oxygen flow rate at the outlet of the branch pipe 621, the ratio of the inner diameter D of the main pipe 620 to the inner diameter d of the branch pipe 621 can be set to be greater than 2. As shown in Figure 6, a pair of oxygen inhalation parts 61 are provided on the top of the mask 60, and each oxygen inhalation part 61 is provided with an oxygen inhalation port 610. The outer contour shape of the oxygen inhalation part 61 is adapted to the shape of the nostrils, making it easy to contact the oxygen inhalation part 61 with the nostrils during use. In this embodiment, the outer contour of the oxygen inhalation part 61 can be a gradually narrowing funnel shape, and the oxygen inhalation port 610 is provided at the outlet of the funnel. The mask 60 is provided with a balance air hole 601 connecting the inside of the mask 60 with the outside, so as to expel the air exhaled by the user in a timely manner. At the same time, the direction of the oxygen inhalation port 610 is also consistent with the direction of the outlet of the branch pipe 621, ensuring that the direction of the oxygen sprayed from the outlet of the branch pipe 621 is towards the user's mouth or nose. The oxygen inhalation unit 61 is fixed to the base of the hood 60. The base of the hood 60 is shaped like a cover and forms an inner cavity. The base of the hood 60 covers the main air pipe 620 and the branch pipe 621 in the inner cavity of the hood 60.

[0091] Referring to Figures 5 and 6, to facilitate the installation of the oxygen supply pipe 62 on the hood 60, the top of the main air pipe 620 is provided with a connection port 6200, and the inner wall of the hood 60 is provided with a positioning boss 600. The positioning boss 600 is centrally located inside the hood 60 and protrudes downward along the inner wall surface of the hood 60. After the positioning boss 600 is engaged with the connection port 6200 at the top of the main air pipe 620, the positioning between the hood 60 and the main air pipe 620 can be achieved. At the same time, the positioning boss 600 can also seal the connection port 6200 at the top of the main air pipe 620, so that all the oxygen in the main air pipe 620 is output through the branch pipe 621 connected to the main air pipe 620. As shown in Figures 5 and 6, a tube clip 6210 is provided on the outer edge of the air outlet port of the branch pipe 621. The tube clip 6210 protrudes along the direction perpendicular to the axis of the branch pipe 621 and is arranged in a circle around the circumference of the air outlet port of the branch pipe 621. The tube clip 6210 engages with the groove on the inner wall of the oxygen inhalation part 61. The tube clip 6210 is engaged in the groove, so that the axis of the oxygen inhalation port 610 is coaxial with the axis of the air outlet port of the branch pipe 621. In actual use, this design ensures that the oxygen sprayed from the air outlet port of the branch pipe 621 can pass through the oxygen inhalation port 610 in a straight line without obstruction and continue to enter the user's mouth or nose directly in a straight line. Of course, when the user chooses not to insert the oxygen inhalation port 610 into their mouth or nose, since the outlet direction of the branch tube 621 is consistent with the outlet direction of the oxygen inhalation port 610, the user can also aim the oxygen inhalation port 610 at their nose or mouth, keeping the oxygen inhalation port 610 close to their nose or mouth but not in direct contact, thus allowing the oxygen inhalation port 610 to spray oxygen into their nose or mouth. This is especially suitable for scenarios where the handheld portable oxygen concentrator is in oxygen spray mode, improving the convenience of oxygen use. Due to the high speed of oxygen spray, a sufficient oxygen supply can also be obtained. The mask body 60 can be made of flexible materials, such as silicone or fluorosilicone. Similarly, the main air tube 620 and the branch tube 621 can also be made of flexible materials such as silicone or fluorosilicone. The flexible material allows the mask body 60 and the oxygen inhalation part 61 to deform when in contact with the nose or mouth, or to deform when stored, making it easy to store.

[0092] In other embodiments, the oxygen nozzle 6 is any one of a nasal cannula, a breathing mask, a mouthpiece oxygen tip, a nasal mask oxygen tip, or a jet oxygen supply interface. The oxygen nozzle 6 can adopt one or more combinations of various structures such as a nasal cannula, a breathing mask, a mouthpiece oxygen tip, a nasal mask oxygen tip, and a jet oxygen supply interface, as needed.

[0093] Referring to Figures 2 and 3, in some embodiments, a button 17 is integrated on the control panel 12. The button 17 is at least partially exposed on the side 16 of the body 1. When the button 17 is triggered, the oxygen-enriched gas in the oxygen storage component 4 flows to the oxygen mouthpiece 6 through the air outlet component 5. Specifically, a through hole is provided on the side 16 of the body 1 to expose the button 17, so that when the user holds the side 16 of the body 1, he can directly contact and press the button 17. The control panel 12 controls the air passage in the air outlet component 5 to open or close, so that when the user needs oxygen, pressing the button 17 will allow the oxygen-enriched gas stored in the oxygen storage component 4 to be discharged into the oxygen mouthpiece 6 for the user to inhale oxygen. When the oxygen use is over or no longer needed, the button 17 can be pressed again to close the air passage in the air outlet component 5 that connects the oxygen storage component 4 and the oxygen mouthpiece 6, so that the oxygen storage component 4 stops supplying oxygen. Furthermore, the button 17 can be positioned on the side 16 near the top 14, allowing the user's thumb to naturally contact the button 17 when holding the device 1 with one hand. This facilitates user control of the oxygen supply to the handheld portable oxygen concentrator, improving the user experience. The button 17 can also be divided into an oxygen supply switch and an oxygen generation switch, allowing users to customize the oxygen generation and supply of the handheld portable oxygen concentrator.

[0094] Referring to Figures 1, 2 and 3, in some embodiments, the handheld portable oxygen concentrator further includes an upper cover 80 connected to the top part 14 of the body 1; the oxygen inhalation nozzle 6 is located in the cavity enclosed by the upper cover 80 and the top part 14, and when the upper cover 80 is opened, the oxygen-enriched gas in the oxygen storage component 4 can flow to the oxygen inhalation nozzle 6 through the air outlet component 5.

[0095] Specifically, the handheld portable oxygen concentrator also includes a switch assembly 81 on the body 1, and an upper cover 80 on the top surface 14 of the body 1, which together form a cavity for accommodating the oxygen inhalation nozzle 6. The upper cover 80 includes a cover body 800, a connecting part 801 and a locking part 802 on the cover body 800. The connecting part 801 is rotatably connected to the body 1, and the locking part 802 cooperates with the switch assembly 81 to lock or detach the upper cover 80 relative to the body 1.

[0096] The top cover 80 and the top surface 14 of the body 1 have an openable and closable structure. Specifically, it can be a flip-top opening and closing structure, or a hinged or threaded structure. As shown in Figures 2 and 3, the connection between the top cover 80 and the top surface 14 and side surface 16 of the body 1 is achieved by rotating the connecting part 801 to realize a flip-top connection. The connecting part 801 includes a pivot structure 8010 and a pivot spring 8011 sleeved on the pivot structure 8010. The top cover 80 rotates around the pivot structure 8010 to open or close. The pivot spring 8011 is sleeved on the pivot structure 8010. Under the action of the pivot spring 8011, the top cover 80 will remain in the open state until the top cover 80 is pressed or fixed by external force, at which point it will remain in the closed latched state. Correspondingly, a switch assembly 81 is located on the side 16 of the body 1 near the top 14, for connection with the locking part 802. The switch assembly 81 includes a latching button 810, which is rotatably connected to the top side wall of the body 1 via a latching pivot 811. The latching pivot 811 is horizontally oriented and rotatably positioned in the middle of the latching button 810. The latching button 810 can move like a seesaw around the latching pivot 811. A latching spring 812 is sleeved on the latching pivot 811. Under the action of the latching spring 812, the portion of the latching button 810 above the latching pivot 811 is closer to the body 1 than the portion below the latching pivot 811. When the user presses the part of the latching button 810 located below the latching pivot 811 with their finger, the aforementioned seesaw effect allows the part of the latching button 810 located below the latching pivot 811 to move closer to the body 1, while the part of the latching button 810 located above the latching pivot 811 moves away from the body 1. At this point, when the part of the latching button 810 located above the latching pivot 811 is closer to the body 1, that is, when the part of the latching button 810 located above the latching pivot 811 is engaged and fixed with the locking part 802 of the top cover 80, the top cover 80 is in the closed state. The locking part 802 can specifically be a groove structure. If the user presses the part of the buckle button 810 located below the buckle pivot 811, the part of the buckle button 810 located above the buckle pivot 811 will move away from the top cover 80. The top cover 80, which is no longer locked in place by the buckle button 810, will automatically open under the action of the pivot spring 8011 on the connecting part 801, and the oxygen inhalation nozzle 6 will be exposed to the user.

[0097] Referring to Figure 3, the handheld portable oxygen concentrator also includes a sensing unit 13 electrically connected to the control board 12. The sensing unit 13 is used to detect and acquire signals that the top cover 80 is opened or closed from the body 1. When the sensing unit 13 detects that the top cover 80 is opened from the body 1, the oxygen-enriched gas in the oxygen storage component 4 flows to the oxygen inhalation nozzle 6 through the air outlet component 5, that is, the sensing unit 13 opens the oxygen outlet channel 503 in the air outlet component 5 through the control board 12. When the sensing unit 13 detects that the top cover 80 is closed from the body 1, the oxygen-enriched gas in the oxygen storage component 4 cannot flow to the oxygen inhalation nozzle 6 through the air outlet component 5, that is, the sensing unit 13 closes the oxygen outlet channel 503 through the control board 12. In practical use, when a user needs oxygen from the oxygen concentrator, they simply open the top cover 80. The sensor unit 13 detects this opening and transmits a signal to the control board 12, opening the oxygen outlet channel 503. Oxygen from the storage tank 4a is then delivered to the oxygen nozzle 6 through the outlet channel 503. Since the oxygen nozzle 6 is now exposed to the user, they only need to approach it to begin using oxygen, achieving rapid oxygen supply between the oxygen concentrator and the user. When the user no longer needs oxygen, they simply close the top cover 80. The sensor unit 13 detects this closing and transmits a signal to the control board 12, closing the oxygen outlet channel 503, achieving rapid separation between the oxygen concentrator and the user. By establishing a linkage between the opening and closing of the top cover 80 and oxygen supply, the ease of use is greatly improved, especially suitable for intermittent oxygen use scenarios with short supply durations but high frequency. Furthermore, with the top cover 80 closed, the oxygen nozzle 6 is located within the cavity formed by the top cover 80 and the main body 1, allowing for convenient carrying of the oxygen concentrator along with the nozzle 6. The cavity formed by the top cover 80 and the main body 1 also effectively protects the hygiene of the oxygen nozzle 6. The entire handheld oxygen concentrator presents a continuously generating "oxygen cylinder" structure. When used with one hand, the top cover 80 can be opened and closed during movement, enabling convenient and readily usable use in a wider range of scenarios.

[0098] Based on the buttons 17 and sensing unit 13 on the control panel 12, and the opening or closing of the top cover 80, in some embodiments, the handheld portable oxygen concentrator also provides any of the following oxygen generation methods:

[0099] Method 1: Press control button 17 to start oxygen production. This method allows for rapid oxygen production.

[0100] Method 2: After pressing control button 17, the system detects the open / closed state of the top cover 80. When the top cover 80 is detected as open, oxygen production begins only after the top cover 80 is closed; oxygen production begins only after the top cover 80 is detected as closed. This method detects the open / closed state of the top cover 80 and temporarily suspends oxygen production when the top cover 80 is open to prevent noise from affecting the user experience. Oxygen production resumes only after the top cover 80 is detected as closed, i.e., after oxygen use has stopped.

[0101] Method 3: After pressing control button 17, check the air pressure inside oxygen storage tank 4a. When the air pressure is lower than 110 kPa, oxygen production will begin. Generally, 110 kPa is the upper limit for oxygen production and storage in oxygen storage tank 4a. When the air pressure inside oxygen storage tank 4a is detected to be lower than 110 kPa, oxygen production will be started directly to ensure that the air pressure inside oxygen storage tank 4a is always sufficient.

[0102] Based on the above method, some embodiments also provide an oxygen concentrator oxygen supply method, including a handheld portable oxygen concentrator, comprising the following steps: oxygen is supplied through the oxygen inhalation nozzle 6 after the top cover 80 is opened, and oxygen supply is stopped through the oxygen inhalation nozzle 60 after the top cover 80 is closed. As the most basic oxygen supply method, oxygen is supplied immediately upon opening the top cover 80, and oxygen supply is stopped immediately upon closing the top cover 80. The entire oxygen use process is convenient and simple, and can meet the user's needs for rapid oxygen supply and rapid separation between the oxygen concentrator and the user.

[0103] Regarding the oxygen supply method, button 17 integrates an oxygen injection switch. When using the press-to-inject oxygen switch, to prevent accidental oxygen injection due to the switch being pressed before the top cover 80 is opened, the following solution can be selected: The oxygen injection switch is located on the body 1. After opening the top cover 80 and pressing the oxygen injection switch, the oxygen nozzle 6 will inject oxygen. In actual use, both the "top cover is open" and the "oxygen injection button is pressed" conditions must be met simultaneously for oxygen injection to occur.

[0104] Furthermore, to prevent oxygen waste due to accidental opening of the top cover 80 when there is no need for oxygen, the following solution can be chosen: A respiratory detection sensor electrically connected to the control board 12 is included. The respiratory detection sensor is located within the cavity formed by the top cover 80 and the body 1. After the top cover 80 is opened and the respiratory detection sensor detects the user's exhaled air, the oxygen mouthpiece 6 supplies oxygen. When there is no need for oxygen, even if the top cover 80 is accidentally opened, the distance between the user's nose and the oxygen mouthpiece is too great for the respiratory detection sensor to detect the user's breath. Therefore, even if the top cover 80 is opened, the oxygen mouthpiece 6 will not supply oxygen. Oxygen will only be supplied by the oxygen mouthpiece 6 after the respiratory detection sensor detects the user's breath.

[0105] Specifically, regarding the molecular sieve tank 30, the oxygen storage tank 4a, and the pressurized gas tank 44, the molecular sieve tank 30 adopts a conventional molecular sieve tank structure to produce oxygen. The molecular sieve tank 30 continuously produces oxygen and delivers it to the oxygen storage tank 4a, forming a sustainable oxygen-producing "oxygen cylinder" structure. After the oxygen storage tank 4a is full of oxygen, oxygen is supplied by spraying, which can also achieve continuous oxygen supply. Among them, the spraying oxygen supply can allow users to inhale more oxygen in a very short time, making the application scenarios of handheld oxygen concentrators wider. For example, people with hypoxia can quickly inhale oxygen in a short time. It can also be used in scenarios where you need to refresh yourself. When you need oxygen, you can hold it with one hand and move it to your nose and mouth to spray oxygen once or several times. After use, you can put it away and use it whenever you want. The internal molecular sieve tank 30 continuously delivers oxygen-enriched gas to the oxygen storage tank 4a to ensure that the oxygen inhalation needs are met.

[0106] As shown in Figures 3 and 4, the molecular sieve tank 30 includes two components. The oxygen storage tank 4a, as a main component of the handheld portable oxygen generator, is used to store oxygen-enriched gas, which can be directly inhaled by the user to improve hypoxia symptoms. A pressurized gas tank 44 is provided on the gas path through which the oxygen-enriched gas flows into the oxygen storage tank 4a. The pressurized gas tank 44 is connected to the molecular sieve tank 30 and the oxygen storage tank 4a through a conveying channel 500. During the oxygen generation process, the gas coming out of the molecular sieve tank 30 first accumulates in the pressurized gas tank 44. After generating a certain pressure, it can be injected into the oxygen storage tank 4a through a solenoid valve. This increases the speed at which the gas enters the oxygen storage tank 4a, promotes the accumulation of oxygen in the oxygen storage tank 4a, and increases the pressure, meeting the oxygen flow rate requirements in continuous oxygen generation mode and the oxygen injection flow rate requirements in intermittent oxygen generation mode. The pressure tank 44 can be an independent structure that can contain gas, or it can be a gas storage chamber in the gas line, or it can be part of the volume space of the oxygen storage tank 4a, or it can be part of the volume space of the oxygen outlet of the molecular sieve tank 30. It only needs to meet the requirement that the oxygen-enriched gas flows into the pressure tank 44 before flowing into the oxygen storage tank 4a to generate pressure.

[0107] If the pressure tank 44 is placed inside the oxygen storage tank 4a, it does not occupy additional space, which is beneficial to the compactness and miniaturization of the equipment. Therefore, the pressure tank 44 can be fixed inside the oxygen storage tank 4a, placed only inside the oxygen storage tank 4a, or a portion of the space inside the oxygen storage tank 4a can be used directly as the pressure tank 44. The oxygen-enriched gas entering the oxygen storage tank 4a reaches a certain pressure in the pressure tank 44, and the pressure setting is generally determined at the time of product shipment. In addition, using the pressure tank 44 for pressure backup can also, in turn, keep the pressure in the molecular sieve tank 30 within a high-pressure range, making the air flow speed in the molecular sieve tank 30 slower. With the molecular sieve volume reduced, this ensures sufficient contact between the air and the internal molecular sieve, ensuring sufficient nitrogen adsorption and increasing the oxygen concentration, i.e., increasing the oxygen content of the oxygen-enriched gas entering the pressure tank 44. At the same time, after the pressure of the oxygen-enriched gas is increased by the pressure tank 44, the pressure of the oxygen-enriched gas entering the oxygen storage tank 4a can also be increased simultaneously. In addition to ensuring a uniform concentration of oxygen-enriched gas within the oxygen storage tank 4a, it also allows the pressure of the oxygen-enriched gas within the tank to meet the demand for a large amount of oxygen to be sprayed outwards in a short period of time.

[0108] To save space, the gas outlet assembly 5 includes an upper air duct plate 50, as shown in Figures 8-12. Both the molecular sieve tank 30 and the oxygen storage tank 4a are connected to the upper air duct plate 50. The delivery channel 500 is integrated inside the upper air duct plate 50 and includes a first oxygen channel 573, a second oxygen channel 574, and an oxygen inlet channel 502. Specifically, the molecular sieve tank 30 is connected to the pressurized gas tank 44 via the first oxygen channel 573 or the second oxygen channel 574 of the upper air duct plate 50, and the pressurized gas tank 44 is connected to the oxygen storage tank 4a via the oxygen inlet channel 502 of the upper air duct plate 50. The first oxygen channel 573 and the second oxygen channel 574 correspond to the two molecular sieve tanks 30 respectively. A one-way valve 501 facing the pressurized gas tank 44 can also be provided at the end of the first oxygen channel 573 or the second oxygen channel 574 connected to the pressurized gas tank 44. The other end of the first oxygen channel 573 or the second oxygen channel 574 is connected to the molecular sieve tank 30 through a through-hole. The gas exiting the molecular sieve tank 30 first enters the pressurized gas tank 44 through the first oxygen channel 573 or the second oxygen channel 574. A connecting hole 508 extending along the thickness direction of the upper air duct plate 50 is also provided between the pressurized gas tank 44 and the oxygen inlet channel 502. The gas from the pressurized gas tank 44 enters the oxygen inlet channel 502 through the connecting hole 508. A pulse solenoid valve 51 can also be installed in the oxygen inlet channel 502 so that the oxygen finally enters the oxygen storage tank 4a for storage through the pulse solenoid valve 51. This reduces the use of gas pipes, makes the overall structure more compact, and helps to reduce the overall volume.

[0109] The pressurized gas tank 44 can be integrated with the oxygen storage tank 4a or installed independently. For ease of assembly, both the pressurized gas tank 44 and the oxygen storage tank 4a can be designed with an open top. During installation, the pressurized gas tank 44 is first installed on the bottom surface of the upper air duct plate 50 with screws. Then, the oxygen storage tank 4a is sealed to the bottom surface of the upper air duct plate 50 from the top, with the pressurized gas tank 44 enclosed inside. This ensures that both the pressurized gas tank 44 and the oxygen storage tank 4a are sealed to the upper air duct plate 50, reducing assembly difficulty.

[0110] To simultaneously supply and discharge oxygen to the oxygen storage tank 4a using the upper air duct plate 50, as shown in Figure 8, the bottom of the upper air duct plate 50, located inside the oxygen storage tank 4a, is equipped with an oxygen inlet 504 and an oxygen outlet 505. The top of the upper air duct plate 50 is equipped with an oxygen outlet 506. The upper end of the oxygen inlet 504 is connected to the oxygen inlet channel 502, and the upper end of the oxygen outlet 505 is connected to the oxygen outlet 506 via the oxygen outlet channel 503. Similarly, an oxygen outlet solenoid valve 52 can be installed in the oxygen outlet channel 503. Finally, the oxygen outlet 506 is connected to the oxygen supply pipe 62 of the oxygen inhalation nozzle 6. Integrating the oxygen inlet channel 502 and the oxygen outlet channel 503 of the oxygen storage tank 4a together using the upper air duct plate 50 allows for a more compact gas path structure, achieving equipment miniaturization.

[0111] Since both the oxygen inlet 504 and the oxygen outlet 505 are located on the upper air duct plate 50 and are close together, gas entering the oxygen storage tank 4a through the oxygen inlet 504 may immediately exit through the oxygen outlet 505, failing to mix with the gas inside the tank, resulting in uneven oxygen concentration. Therefore, a preferred solution is to have an outlet pipe 5050 extending to the bottom of the oxygen storage tank 4a at the lower end of the oxygen outlet 505. Oxygen enters the oxygen storage tank 4a from the upper air duct plate 50 and is then discharged from the bottom of the oxygen storage tank 4a through the outlet pipe 5050. In the initial stage of oxygen production, the oxygen can be accelerated by the backup pressure tank 44 and the pulse solenoid valve 51, thereby increasing the oxygen concentration in the oxygen storage tank 4a and ensuring the uniformity of the supplied oxygen concentration.

[0112] To monitor the gas pressure in the pressurized gas tank 44, a detection channel 507 is provided on the upper air duct plate 50. One end of the detection channel 507 is connected to the pressurized gas tank 44 through a connecting hole 508, and the other end of the detection channel 507 has a detection port 5070 passing through the upper air duct plate 50. By installing a gas pressure detector at the detection port 5070, the gas pressure in the pressurized gas tank 44 is detected. When the pressure reaches a set value, the pulse solenoid valve 51 is opened to send oxygen into the oxygen storage tank 4a, ensuring the stability of the pressurized gas tank 44. In addition, to detect the oxygen concentration in the oxygen storage tank 4a, a connection port 40 for connecting an external oxygen concentration detector is provided on the oxygen storage tank 4a. Because this invention is a bottom-outlet oxygen type, the connection port 40 is preferably located at the bottom of the oxygen storage tank 4a.

[0113] Regarding the installation method of the oxygen storage tank 4a, the preferred solution adopted in this embodiment is to fix it on the support frame 20 below. The support frame 20 is used to place the compressed air source 21. One side of the top of the support frame 20 is used to install the molecular sieve air inlet assembly 9, and the other side is used to connect to the bottom of the oxygen storage tank 4a. The bottom of the oxygen storage tank 4a is also provided with a clearance space 42 for accommodating the molecular sieve air inlet assembly 9. The oxygen storage tank 4a is fixed to the top of the support frame 20 with screws to ensure the stability of the installation of the oxygen storage tank 4a. After the oxygen storage tank 4a is fixed, the molecular sieve air inlet assembly 9 is located exactly in the clearance space 42 at the bottom of the oxygen storage tank, thereby saving longitudinal space and ensuring the compactness of the structure.

[0114] Because the oxygen storage tank 4a has a certain volume and strong structural integrity, it can be used as the mounting base for the upper air duct plate 50. For easy positioning and installation, an upper positioning skirt 54 is provided at the bottom of the upper air duct plate 50 where it connects to the oxygen storage tank 4a. The upper air duct plate 50 mates with the opening at the top of the oxygen storage tank 4a via the upper positioning skirt 54 and is then fixed to the oxygen storage tank 4a with screws.

[0115] After the oxygen storage tank 4a and the upper air duct plate 50 are fixed, the upper and lower ends of the two molecular sieve tanks 30 can be fixedly connected to the upper air duct plate 50 and the molecular sieve air intake assembly 9, respectively. In order to reduce the lateral space occupation, two arc-shaped grooves 43 are provided on the side of the oxygen storage tank 4a near the molecular sieve tank 30. The two molecular sieve tanks 30 are respectively located in the two arc-shaped grooves 43, so that the periphery of the molecular sieve tank 30 and the oxygen storage tank 4a does not exceed the top edge of the support frame 20.

[0116] Specifically, regarding the gas outlet assembly 5, pulse solenoid valve 51, oxygen outlet solenoid valve 52, and pressure equalization solenoid valve 53, the gas outlet assembly 5 includes an upper air duct plate 50 that connects the two molecular sieve tanks 30 and the oxygen storage tank 4a through an internal channel. The upper air duct plate 50 is provided with a valve support 55 on its top. The valve support 55 is provided with a pulse solenoid valve 51, an oxygen outlet solenoid valve 52, and a pressure equalization solenoid valve 53 arranged in an equilateral triangle around the oxygen outlet 506 in the middle. The pulse solenoid valve 51 is provided on the conveying channel 500 between the oxygen outlet ends of the two molecular sieve tanks 30 and the oxygen storage tank 4a. The oxygen outlet solenoid valve 52 is provided on the oxygen outlet channel 503 between the oxygen storage tank 4a and the oxygen outlet 506. The pressure equalization solenoid valve 53 is provided on the channel between the oxygen outlet ends of the two molecular sieve tanks 30. The pulse solenoid valve 51, oxygen outlet solenoid valve 52, and pressure equalization solenoid valve 53 are three identical two-position two-way solenoid valves arranged in an equilateral triangle. This arrangement is suitable for oxygen generator structures with circular or triangular cross-sections, resulting in a compact overall structure. Furthermore, it fully utilizes the lateral space of the upper air duct plate 50 to integrate the internal air duct structure, enabling the air duct arrangement for oxygen inlet and outlet of the oxygen storage tank 4a and pressure equalization of the molecular sieve tank 30. Additionally, arranging the three solenoid valves together facilitates wiring layout, avoids wiring confusion, and improves maintenance convenience. The overall height is low after arranging the three solenoid valves on the valve bracket 55, contributing to a thinner overall structure. Simultaneously, the integration of the solenoid valves forms a modular unit, enabling integrated assembly.

[0117] As shown in Figures 7, 9, 12, and 13, to facilitate the installation of the valve bracket 55 and the three solenoid valves, the valve bracket 55 has a triangular frame structure. The valve bracket 55 includes a first corner 554, a second corner 555, and a third corner 556, and the three corners are provided with connecting holes 550. The valve bracket 55 is fixed to the upper airway plate 50 by screws passing through the connecting holes 550. The valve bracket 55 includes a first side wall 551, a second side wall 552, and a third side wall 553, and each of the three side walls is provided with screw holes. The pulse solenoid valve 51, the oxygen outlet solenoid valve 52, and the pressure equalization solenoid valve 53 are fixed to the three side walls of the valve bracket 55 by screws connected to the screw holes.

[0118] As shown in Figures 9-13, the airway connection between the pulse solenoid valve 51 and the upper airway plate 50 is as follows: the delivery channel 500 includes an oxygen inlet channel 502, which is located in the middle of the bottom surface of the valve support 55. An oxygen inlet through-hole 5540 is provided at the first corner 554 of the bottom surface. A first channel 5511 and a second channel 5512 are provided on the first sidewall 551 of the valve support 55. The pulse solenoid valve 51 is located on the first sidewall 551, with its two ports connected to one end of the first channel 5511 and the second channel 5512, respectively. The other end of the first channel 5511 is connected to one end of the oxygen inlet channel 502. The other end of the second channel 5512 is connected to one end of the oxygen inlet hole 5540 through a drilled hole. The other ends of the oxygen inlet channel 502 and the oxygen inlet hole 5540 are connected to the molecular sieve tank 30 and the oxygen storage tank 4a respectively through the upper air duct plate 50. Specifically, before the oxygen enters the oxygen storage tank 4a, it first enters the pressure tank 44 inside the oxygen storage tank 4a. After the oxygen in the pressure tank 44 reaches a certain pressure, the pulse solenoid valve 51 is controlled to start or close in a pulse manner, so that the oxygen in the pressure tank 44 is injected into the oxygen storage tank 4a. The oxygen in the oxygen storage tank 4a can only be output to the outside for the user.

[0119] As shown in Figures 11, 12, and 13, the oxygen outlet solenoid valve 52 is connected to the upper airway plate 50 via an oxygen outlet channel 503 in the middle of the bottom surface of the valve support 55. An oxygen outlet through-hole 5550 is located at the second corner 555 of the bottom surface. A third channel 5523 and a fourth channel 5524 are located on the second sidewall 552 of the valve support 55. The oxygen outlet solenoid valve 52 is mounted on the second sidewall 552, with its two ports connected to one end of the third channel 5523 and the fourth channel 5524, respectively. The other end of the third channel 5523... One end of the fourth channel 5524 is connected to one end of the oxygen outlet channel 503 through a drilled hole. The other end of the fourth channel 5524 is also connected to one end of the oxygen outlet through hole 5550 through a drilled hole. The other end of the oxygen outlet channel 503 is connected to the oxygen outlet 506 through a drilled hole. The other end of the oxygen outlet through hole 5550 is connected to the oxygen storage tank 4a through the upper airway plate 50. The oxygen outlet solenoid valve 52 is used to realize the oxygen in the oxygen storage tank 4a being sprayed out from the oxygen outlet 506. By controlling the opening and closing state of the oxygen outlet solenoid valve 52, oxygen delivery in two modes, pulse oxygen supply or continuous oxygen supply, can be realized.

[0120] As shown in Figures 12 and 13, the triangular portion 556 on the bottom surface of the valve support 55 is provided with a first equalizing hole 5561 and a second equalizing hole 5562. The lower ends of the first equalizing hole 5561 and the second equalizing hole 5562 are connected to the oxygen outlet ends of the two molecular sieve tanks 30 through the upper air duct plate 50, respectively. The third side wall 553 of the valve support 55 is provided with a fifth channel 5535 and a sixth channel 5536. The equalizing solenoid valve 53 is set on the third side wall 553, and its two interfaces are connected to one end of the fifth channel 5535 and the sixth channel 5536, respectively. The other ends of the fifth channel 5535 and the sixth channel 5536 are connected to the upper ends of the first equalizing hole 5561 and the second equalizing hole 5562, respectively.

[0121] To facilitate the installation of the oxygen inlet channel 502 and the oxygen outlet channel 503, an upper sealing plate 56 is provided between the bottom surface of the valve bracket 55 and the top surface of the upper air duct plate 50. Both the oxygen inlet channel 502 and the oxygen outlet channel 503 are grooves on the bottom surface of the valve bracket 55, forming a channel structure with the cooperation of the upper sealing plate 56. This structure of grooves plus the sealing plate 56 reduces the processing difficulty of the channel structure, saves costs, and ensures assembly efficiency and accuracy.

[0122] As shown in Figures 8, 10, 11, and 12, the gas path connection between the upper air duct plate 50 and the molecular sieve tank 30, the oxygen storage tank 4a, and the valve support 55 is as follows: The molecular sieve tank 30 and the oxygen storage tank 4a are both located on the bottom surface of the upper air duct plate 50. The upper air duct plate 50 has an oxygen inlet 570, an air inlet vent 571, and an air outlet vent 572 penetrating its upper and lower surfaces. The delivery channel 500 includes a first oxygen channel 573, a second oxygen channel 574, a first pressure equalization channel 575, and a second pressure equalization channel 576 located on the top surface of the upper air duct plate 50. The lower ends of the two oxygen inlets 570 are respectively connected to the two molecular sieve tanks 30. The oxygen outlets are connected to each other, with their upper ends connected to one end of the first oxygen channel 573 and the second oxygen channel 574, respectively. The other ends of the first oxygen channel 573 and the second oxygen channel 574 are connected to the oxygen inlet channel 502. One end of the first pressure equalization channel 575 and the second pressure equalization channel 576 are connected to the first oxygen channel 573 and the second oxygen channel 574, respectively, and the other end is connected to the lower end of the first pressure equalization hole 5561 and the second pressure equalization hole 5562, respectively. The lower ends of the air inlet hole 571 and the air outlet hole 572 are connected to the oxygen storage tank 4a, and their upper ends are connected to the oxygen inlet hole 5540 and the oxygen outlet hole 5550, respectively. For ease of processing, the first oxygen channel 573, the second oxygen channel 574, the first pressure equalization channel 575, and the second pressure equalization channel 576 are all groove structures on the top surface of the upper air duct plate 50, forming a channel structure with the cooperation of the upper sealing plate 56.

[0123] Specifically, regarding the molecular sieve air intake assembly 9, as shown in Figures 14-17, the molecular sieve air intake assembly 9 includes a lower air duct plate 90, a first solenoid valve 91, and a second solenoid valve 92. The lower air duct plate 90 is provided with an air intake channel 900, a connecting channel 901, and an exhaust channel 902 that are isolated from each other. There are two connecting channels 901. The air intake ends of the two connecting channels 901 are connected to the air intake channel 900 and the exhaust channel 902 respectively through the first solenoid valve 91 and the second solenoid valve 92. When the first solenoid valve 91 and the second solenoid valve 92 are de-energized, the corresponding connecting channel 901 is connected to the air intake channel 900. When energized, the corresponding connecting channel 901 is connected to the exhaust channel 902. To facilitate connection between the lower air duct plate 90 and other equipment, the lower air duct plate 90 is provided with an air inlet 903, an exhaust port 904, and two air outlets 905. The air inlet 903 is connected to the air intake channel 900, the exhaust port 904 is connected to the exhaust channel 902, and the two air outlets 905 are respectively connected to the outlet ends of two connecting channels 901. The air inlet 903 is used to connect to the compressed air source 21, allowing the gas generated by the compressed air source 21 to enter the air intake channel 900. The two air outlets 905 are used to connect to the air inlet ends of two molecular sieve tanks 30, respectively, providing gas to the molecular sieve tanks 30. The exhaust port 904 is used to discharge the desorbed gas from the molecular sieve tanks 30 to the molecular sieve air intake assembly 9.

[0124] The working process of the molecular sieve air intake component 9 in this handheld portable oxygen concentrator is as follows: As shown in Figures 15, 16, and 17, when both the first solenoid valve 91 and the second solenoid valve 92 are de-energized, the left and right connecting channels 901 are connected to the air intake channel 900 through the corresponding first solenoid valve 91 and second solenoid valve 92, respectively. The air intake channel 900 is connected to the compressed air source component 2 through the air intake port 903. Therefore, when the oxygen concentrator is not working, external air cannot enter the compressed air source component 2, and thus cannot enter the molecular sieve tank 30 through the molecular sieve air intake component 9. This avoids the problem of the molecular sieve absorbing moisture and failing due to contact with external air through the exhaust port 904. When the oxygen generator is working, the first solenoid valve 91 and the second solenoid valve 92 are alternately energized and de-energized. For example, the first solenoid valve 91 is de-energized and the second solenoid valve 92 is energized. At this time, the left connecting channel 901 is connected to the air intake channel 900, and the right connecting channel 901 is connected to the exhaust channel 902. The compressed gas generated by the compressed air source assembly 2 enters a molecular sieve tank 30 through the air intake port 903, the air intake channel 900, the left connecting channel 901, and the left air outlet 905 in sequence. Nitrogen is adsorbed, and the remaining oxygen-enriched gas exits from one molecular sieve tank 30. Most of the gas enters the oxygen storage tank 4a, and a small portion enters another molecular sieve tank 30. This portion of gas enters the exhaust port 904 through the right air outlet 905, the right connecting channel 901, and the exhaust channel 902 in sequence, backwashing the other molecular sieve tank 30. The first solenoid valve 91 and the second solenoid valve 92 operate alternately according to the above process, so as to realize the continuous air intake, exhaust, and exhaust of the two molecular sieve tanks 30, thereby achieving continuous oxygen production.

[0125] By laying the first solenoid valve 91 and the second solenoid valve 92 flat on the front of the lower air duct plate 90, the vertical space occupied by the molecular sieve air intake assembly 9 can be reduced, which is beneficial to the miniaturization of the oxygen generator. In addition, through the structural design of the air intake channel 900, the connecting channel 901 and the exhaust channel 902, the two molecular sieve tanks 30 share the air intake channel 900 and the exhaust channel 902, thereby reducing the number of air ducts and making the structure more compact and simple. Furthermore, with the cooperation of the solenoid valves and the air duct structure, when the equipment is in the closed state, the compressed air source 21 is also in the closed state. The air intake ends of the two molecular sieve tanks 30 are connected to the compressed air source 21, thus avoiding the problem of the molecular sieve tanks 30 absorbing moisture and failing due to contact with the outside air through the exhaust port 904.

[0126] To facilitate the installation of channel structures on the lower air duct plate 90, in some embodiments, a lower sealing plate 93 is provided between the first solenoid valve 91 and the second solenoid valve 92 and the side of the lower air duct plate 90. The intake channel 900, the connecting channel 901, and the exhaust channel 902 are all grooves provided on the side of the lower air duct plate 90, which cooperate with the lower sealing plate 93 to form a channel structure. This allows for easy machining of various air passages on the lower air duct plate 90 using a milling cutter, reducing production costs. The lower sealing plate 93 has through holes at positions corresponding to the solenoid valve interfaces. The first solenoid valve 91 and the second solenoid valve 92 are fixedly connected to the lower air duct plate 90 with screws to ensure a good seal between the lower sealing plate 93 and the lower air duct plate 90. The intake port 903, the exhaust port 904, and the exhaust port 905 are all exposed interface structures on the surface of the lower air duct plate 90, which are connected to the corresponding intake channel 900, exhaust channel 902, and connecting channel 901 by drilling, facilitating docking with other equipment.

[0127] Since the solenoid valve itself has a certain height, to avoid wasting space, the lower air duct plate 90 can be set to the same height as the solenoid valve. Then, the intake passage 900, exhaust passage 902, and connecting passage 901 are arranged in parallel from bottom to top along the height direction of the lower air duct plate 90. The two connecting passages 901 are located at both ends of the intake passage 900. In addition, as shown in Figure 16, in order to adapt to the interface of the solenoid valve, the ends of the intake passage 900 and the intake ends of the connecting passage 901 can be bent upwards and downwards respectively to be flush with the ends of the exhaust passage 902.

[0128] Furthermore, the air intake channel 900, exhaust channel 902, and connecting channel 901 are all symmetrically arranged with the central axis of the lower air duct plate 90 as the axis of symmetry. The exhaust channel 902 has a guide hole 906 in the middle that communicates with the exhaust port 904. The symmetrical air duct structure ensures that the air intake and exhaust paths of the two molecular sieve tanks 30 are the same, ensuring that they are in the same working state, which is conducive to the continuous and stable operation of the equipment.

[0129] As shown in Figures 16 and 17, the specific connection between the solenoid valve and the lower air duct plate 90 is as follows: the first solenoid valve 91 and the second solenoid valve 92 are both two-position three-way valves. The valve body includes a first valve body channel 921, a second valve body channel 922 and a third valve body channel 923. The first valve body channel 921 is connected to the air inlet end of the connecting channel 901, the second valve body channel 922 is connected to the end of the air inlet channel 900, and the third valve body channel 923 is connected to the end of the exhaust channel 902. The two working positions of the valve body are the first valve body channel 921 connected to the second valve body channel 922 and the first valve body channel 921 connected to the third valve body channel 923.

[0130] Because the molecular sieve air inlet assembly 9 needs to be connected to the compressed air source assembly 2, the molecular sieve air inlet assembly 9 can be integrated with the compressed air source assembly 2, as shown in Figure 14. The compressed air source assembly 2 includes a support frame 20 and a compressed air source 21 (such as a micro compressed air pump) located within the support frame 20. The support frame 20 includes a bottom plate 201 and a top plate 202 that support each other, with a hollowed-out section in the middle for placing the compressed air source 21. The compressed air source 21 is located within the support frame 20. The lower air duct plate 90, the first solenoid valve 91, and the second solenoid valve 92 of the molecular sieve air inlet assembly 9 are all located on the top plate 202 of the support frame 20. The compressed air source 21 is connected to the air inlet 903 of the lower air duct plate 90 through a pipe. The bottom plate 201 of the support frame 20 has an upwardly protruding filter chamber 2010, and the top of the filter chamber 2010 has an air inlet grille 2011. The filter chamber 2010 is connected to the gas inlet of the compressed air source 21 and is used to filter the gas entering the compressed air source.

[0131] In some embodiments, the compressed air source 21 is preferably an L-shaped single-cylinder compressed air pump. An L-shaped single-cylinder compressed air pump refers to a compressed air pump where the motor axis and the piston cylinder axis are perpendicular to each other. Compared to a straight-cylinder compressed air pump, this L-shaped single-cylinder compressed air pump has a more centrally concentrated structure, resulting in less lateral space occupation. Simultaneously, the piston cylinder has a sufficiently large compression chamber, which can increase the gas flow rate of the compressed air source 21. The compressed air source 21 can be installed inside the support frame 20 via an elastic structure. Specifically, the suspension of the compressed air source 21 can be installed inside the support frame 20, providing sufficient support and limiting while mitigating the vibration transmitted from the compressed air source 21 to the support frame 20, thereby improving the vibration reduction effect of the entire compressed air source assembly 2. After installation, the edge of the compressed air source 21 will not protrude beyond the edge of the support frame 20. Especially in handheld oxygen concentrators with a circular cross-section, this minimizes the space occupied by the integrated installation of the compressed air source 21, which is beneficial for further reducing the cross-sectional size of the handheld portable oxygen concentrator and achieving a significant miniaturization of the handheld portable oxygen concentrator body 1.

[0132] As shown in Figures 4 and 14, the support frame 20 includes a top plate 202 and a bottom plate 201. The upper and lower ends of the compressed air source 21 are fixedly connected to the top plate 202 and the bottom plate 201 respectively through elastic structures. An upper support column 2023 protrudes from the bottom surface of the top plate 202, and a lower support column 2013 protrudes from the top surface of the bottom plate 201. The upper support column 2023 and the lower support column 2013 are fixed together. The upper support column 2023 of the top plate 202 and the lower support column 2013 of the bottom plate 201 can be fixed together by plugging or screwing. When installing the compressed air source 21, the compressed air source 21 is first placed inside the bottom plate 201, and then the top plate 202 is installed on the bottom plate 201. This combined structure of the top plate 202 and the bottom plate 201 facilitates the installation of the compressed air source 21 and reduces obstruction, allowing the surface of the compressed air source 21 to be exposed as much as possible, thereby improving the heat dissipation effect of the compressed air source 21. To ensure the structural strength of the entire support frame 20, the upper support column 2023 and the lower support column 2013 include at least three sets, and are evenly distributed along the circumference of the top plate 202 and the bottom plate 201.

[0133] In order to reduce the size of the entire oxygen generator, the support frame 20 can be used not only for installing the compressed air source 21, but also as the mounting base for other equipment. For example, a mounting structure for installing the molecular sieve tank 30, the oxygen storage tank 4a and the molecular sieve air inlet assembly 9 can be set on the top surface of the top plate 202, and a mounting structure for installing the power supply assembly 7 can be set on the bottom surface of the bottom plate 201, thereby reducing other support structures and improving the compactness of the equipment.

[0134] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. A handheld portable oxygen concentrator, characterized in that, include: A body of a size suitable for one-handed use (1); The body (1) includes a top part (14) and a bottom part (15) opposite to each other in the height direction, and a side part (16) connecting the top part (14) and the bottom part (15). The oxygen generation and storage component (X1) is installed inside the body (1). The oxygen generation and storage component (X1) includes a compressed air source component (2), a molecular sieve tank (30), a molecular sieve air inlet component (9), an oxygen storage component (4), an air outlet component (5), and a control board (12). The molecular sieve tank (30) is vertically arranged above the compressed air source assembly (2). The projection outline of the molecular sieve tank (30) on the first projection plane completely overlaps or partially overlaps with the projection outline of the compressed air source assembly (2) on the first projection plane. The first projection plane is a plane perpendicular to the height direction of the body (1). The compressed air source assembly (2) can deliver compressed air to the molecular sieve tank (30) through the molecular sieve inlet assembly (9), the molecular sieve tank (30) prepares oxygen-enriched gas and delivers it to the oxygen storage assembly (4), and the oxygen storage assembly (4) can deliver oxygen-enriched gas to the outside through the outlet assembly (5); Oxygen mouthpiece (6), the oxygen mouthpiece (6) is located on the top part (14) of the body (1) and is connected to the air outlet assembly (5). The oxygen mouthpiece (6) is used to contact the nose or mouth to deliver oxygen. The power supply assembly (7) is located on the bottom part (15) of the body (1) and is used to supply power to the handheld portable oxygen concentrator and serve as the base of the handheld portable oxygen concentrator.

2. The handheld portable oxygen concentrator according to claim 1, characterized in that, Both the top part (14) and the bottom part (15) have a maximum width dimension (L) in the height direction perpendicular to the body (1), and the distance (H) between the top part (14) and the bottom part (15) is greater than the maximum width dimension (L) of the top part (14) or the bottom part (15).

3. The handheld portable oxygen concentrator according to claim 2, characterized in that, The perimeter of the projected outline of the body (1) on the first projection surface is no greater than 270mm, so that it can be held with one hand.

4. The handheld portable oxygen concentrator according to claim 3, characterized in that, The perimeter of the projected outline of the body (1) on the first projection plane ranges from 144 mm to 270 mm.

5. The handheld portable oxygen concentrator according to claim 3, characterized in that, The distance between the two furthest points of the projected outline of the body (1) on the first projection plane is less than 100mm.

6. The handheld portable oxygen concentrator according to claim 1, characterized in that, The control panel (12) is used to control the opening and closing of the air outlet assembly (5); the control panel (12) is integrated with a button (17), which is at least partially exposed on the side (16) of the body (1). When the button (17) is triggered, the oxygen-enriched gas in the oxygen storage assembly (4) flows to the oxygen inhalation nozzle (6) through the air outlet assembly (5).

7. The handheld portable oxygen concentrator according to claim 1, characterized in that, It also includes an upper cover (80) connected to the top part (14) of the body (1), and the oxygen inhalation nozzle (6) is located in the cavity enclosed by the upper cover (80) and the top part (14); When the top cover (80) is opened, the oxygen-enriched gas in the oxygen storage component (4) can flow to the oxygen inhalation nozzle (6) through the air outlet component (5).

8. The handheld portable oxygen concentrator according to claim 7, characterized in that, The control panel (12) is used to control the opening and closing of the air outlet assembly (5); the handheld portable oxygen generator also includes a sensing unit (13) electrically connected to the control panel (12), the sensing unit (13) is used to detect and acquire the signal that the top cover (80) is opened or closed from the body (1); when the sensing unit (13) detects the signal that the top cover (80) is opened from the body (1), the oxygen-enriched gas in the oxygen storage assembly (4) flows to the oxygen inhalation nozzle (6) through the air outlet assembly (5); when the sensing unit (13) detects the signal that the top cover (80) is closed from the body (1), the oxygen-enriched gas in the oxygen storage assembly (4) cannot flow to the oxygen inhalation nozzle (6) through the air outlet assembly (5).

9. The handheld portable oxygen concentrator according to claim 1, characterized in that, It also includes a pressurized gas tank (44), which is used to connect the molecular sieve tank (30) and the oxygen storage component (4). The oxygen-enriched gas prepared by the molecular sieve tank (30) is transported to the oxygen storage component (4) through the pressurized gas tank (44).

10. The handheld portable oxygen concentrator according to claim 9, characterized in that... The oxygen storage component (4) includes an oxygen storage tank (4a) for storing oxygen-enriched gas, and the pressurized gas tank (44) is disposed inside the oxygen storage tank (4a) and communicates with the oxygen storage tank (4a).

11. The handheld portable oxygen concentrator according to claim 1, characterized in that, The air outlet assembly (5) includes an upper air duct plate (50), a pulse solenoid valve (51) disposed on the upper air duct plate (50), an oxygen outlet solenoid valve (52), and a pressure equalization solenoid valve (53); wherein, The upper airway plate (50) integrates a conveying channel (500) and an oxygen outlet channel (503). The conveying channel (500) is used to connect the molecular sieve tank (30) and the oxygen storage component (4). The oxygen outlet channel (503) is used to connect the oxygen storage component (4) and the oxygen inhalation nozzle (6). The pulse solenoid valve (51) is connected to the delivery channel (500) and is used to deliver the oxygen-enriched gas prepared by the molecular sieve tank (3) to the oxygen storage component (4); The oxygen outlet solenoid valve (52) is connected to the oxygen outlet channel (503) and is used to export the oxygen-enriched gas stored in the oxygen storage component (4) to the oxygen inhalation nozzle (6). The molecular sieve tanks (30) include multiple units, and the pressure equalization solenoid valve (53) is used to connect multiple molecular sieve tanks (30).

12. The handheld portable oxygen concentrator according to claim 11, characterized in that, The upper airway plate (50) has a longitudinal axis (50a) extending along its thickness direction and passing through its center, and the pulse solenoid valve (51), oxygen outlet solenoid valve (52) and pressure equalization solenoid valve (53) are arranged at intervals around the longitudinal axis (50a).

13. The handheld portable oxygen concentrator according to claim 1, characterized in that, In the height direction of the body (1), the air outlet assembly (5) is located above the molecular sieve tank (30) and the oxygen storage assembly (4), and the molecular sieve air inlet assembly (9) is located below the molecular sieve tank (30).

14. The handheld portable oxygen concentrator according to claim 1, characterized in that, The oxygen inhalation nozzle (6) includes a cover (60), an oxygen inhalation part (61) disposed on the cover (60), and an oxygen supply tube (62); the cover (60) is disposed on the top part (14) of the body (1); the oxygen supply tube (62) is disposed inside the cover (60) and connects the oxygen inhalation part (61) and the air outlet assembly (5); the oxygen inhalation part (61) is used to contact the nose or mouth to deliver oxygen.

15. The handheld portable oxygen concentrator according to claim 1, characterized in that, The oxygen mouthpiece (6) can be any one of a nasal oxygen tube, a breathing mask, a mouthpiece oxygen head, a nasal mask oxygen head, or a jet oxygen supply interface.

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