Handheld oxygen concentrator

Abstract

This utility model relates to the field of portable oxygen concentrators, and more particularly to a handheld oxygen concentrator that allows for rapid oxygen use with a single hand. It includes a main body and integrated within the main body a compressed air source, an oxygen production unit, and an oxygen storage tank. The oxygen-enriched gas produced by the oxygen production unit is delivered to the oxygen storage tank for storage. A power supply is integrated at the bottom of the main body. The main body is designed for one-handed use. The perimeter of the projected outline of the main body on a first projection plane is less than 270 mm. The main body is equipped with an oxygen inhalation nozzle for direct contact with the mouth or nose, and the nozzle is connected to the oxygen storage tank. This utility model is particularly suitable for situations requiring one-handed operation of the oxygen concentrator and rapid oxygen use.

Description

Technical Field

[0001] This utility model relates to the field of portable oxygen concentrators, and more particularly to a handheld 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 nose 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 adds to the inconvenience and can sometimes lead to serious accidents due to delayed oxygen delivery. In conclusion, existing portable oxygen concentrators fail to provide rapid oxygen delivery, making it difficult to use with a single hand to quickly bring the device to the mouth or nose. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a handheld oxygen generator that allows for rapid oxygen consumption by the user holding it with one hand.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a handheld oxygen concentrator, including a body and a compressed air source, an oxygen generation unit, and an oxygen storage tank integrated within the body. The oxygen-enriched gas produced by the oxygen generation unit is delivered to the oxygen storage tank for storage. The body integrates a power supply and has a structure suitable for single-handed use. The perimeter of the projected outline of the body on a first projection plane does not exceed 270mm. The body is provided with an oxygen inhalation nozzle for direct contact with the mouth or nose, and the nozzle is connected to the oxygen storage tank. The first projection plane is the reference plane for projecting the body. This reference plane can be a plane perpendicular to the stacking direction of the components within the body, a plane perpendicular to the axis of the molecular sieve tank in the oxygen generation unit, a plane perpendicular to the axis of the oxygen storage tank, or a plane perpendicular to the grip axis when holding the body with one hand. As long as there exists such a plane passing through the body as a reference plane, a projected outline can be obtained by projecting the body onto this reference plane. Meanwhile, the perimeter of the device's projected outline on the reference plane is limited to no more than 270mm, thus restricting the device's shape. This limitation ensures that both male and female users can find a stable position for one-handed grip, meaning the device can be held with one hand along the direction of the first projection plane. From this one-handed grip, the user can lift the device and bring it close to their mouth or nose, allowing the oxygen outlet of the inhalation unit to enter their mouth or nose to begin oxygen use. The entire process from needing oxygen to using it eliminates the cumbersome process of wearing a traditional nasal cannula, conveniently achieving quick one-handed oxygen use. When oxygen use is no longer needed, the user simply moves the handheld oxygen concentrator away from their mouth or nose, eliminating the need to remove the nasal cannula and greatly improving the user experience. It can be seen that the entire oxygen use process can be achieved with just one hand, making it seamless, convenient, and efficient. The oxygen generating unit uses a conventional molecular sieve tank to produce oxygen. The oxygen generating unit continuously produces oxygen and delivers it to the oxygen storage tank, forming a sustainable oxygen cylinder structure. Once the oxygen storage tank is full of oxygen, oxygen is supplied via spraying, which can also provide continuous oxygen supply. In particular, the spraying oxygen supply can allow users to inhale more oxygen in a very short time, expanding the application scenarios of the handheld oxygen concentrator. For example, it can be used for people with hypoxia to quickly inhale oxygen in a short time. It can also be used to refresh the mind. When oxygen is needed, 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 oxygen generating unit continuously delivers oxygen-enriched gas to the oxygen storage tank to ensure that the oxygen inhalation needs are met.

[0006] To ensure good oxygen delivery while minimizing the device's size, the following design can be chosen: the perimeter of the device's projected outline on the first projection surface ranges from 144mm to 270mm. To achieve a balance between ease of one-handed use and high oxygen delivery capacity, this design limits the perimeter of the device's projected outline on the first projection surface to 144mm to 270mm. This design ensures that the user can hold the device with one hand while maintaining sufficient oxygen delivery capacity for high oxygen concentrations, maintaining good overall oxygen delivery. In other words, the oxygen concentrator can provide good oxygen delivery even with one-handed use, helping users quickly increase their blood oxygen saturation.

[0007] To further limit the shape of the machine body, the following option can be selected: the distance between the two farthest points of the projected outline of the machine body on the first projection plane is less than 100mm. When the machine body is too thick or too long, it may be difficult to find a good grip angle or the grip may be unstable when holding it with one hand. Based on ergonomic research, the distance between the two farthest points of the projected outline is further limited to less than 100mm to ensure stability and comfort for the user when holding the machine body with one hand.

[0008] To allow for manual activation of oxygen supply using the hand holding the device while holding it with one hand, the following solution can be chosen: The device integrates a button. When the button is pressed, oxygen-enriched gas from the oxygen tank is ejected through the oxygen inhalation nozzle. The integrated button further enhances the controllability of oxygen supply. When the user holds the device with one hand and brings it close to their mouth or nose, the handheld oxygen concentrator functions more like a continuously generating "oxygen cylinder," allowing the user to choose when to start oxygen supply as needed. This significantly improves the user experience and ease of use.

[0009] As a preferred embodiment of the body outline, the cross-sectional shape of the body can be selected as one of a circle, an ellipse, a rectangle, or a polygon.

[0010] To facilitate easy installation and removal of the oxygen nozzle from the machine body when it needs to be replaced, the following solution can be selected: the oxygen nozzle is detachably connected to the machine body. This detachability not only allows for easy replacement of the oxygen nozzle and ensures hygiene, but also enables clean and convenient oxygen supply in scenarios where there is only one oxygen concentrator but multiple people require oxygen. Specifically, each person has their own oxygen nozzle. When it's their turn, they attach their own nozzle to the oxygen concentrator. When a companion needs oxygen, they easily remove their own nozzle and attach their companion's, maximizing the utilization of the oxygen concentrator.

[0011] To allow the oxygen mouthpiece to adapt to differences in nostril size and spacing among users, a flexible material can be chosen for the mouthpiece. Preferably, the flexible material can be silicone, fluorosilicone, or other flexible materials, giving the oxygen mouthpiece the ability to adapt to deformation.

[0012] As a preferred embodiment of the oxygen mouthpiece, the following configuration can be selected: the oxygen mouthpiece includes a cover and branch tubes. The cover has an oxygen intake section extending outwards, and the oxygen intake section has an oxygen outlet. The branch tubes include a main tube for connecting to an oxygen storage tank and branch tubes extending to the oxygen outlets respectively. The inner diameter of the main tube is larger than the inner diameter of the branch tubes. In actual use, when the user needs oxygen, they simply pick up the handheld oxygen concentrator and bring the cover of the handheld oxygen concentrator close to their mouth or nose, allowing the oxygen outlet of the intake section to enter their mouth or nose, and then they can begin using oxygen. The entire process from needing oxygen to using oxygen eliminates the cumbersome wearing process of traditional nasal cannulas, conveniently achieving rapid oxygen use. When the user no longer needs oxygen, they simply move the handheld oxygen concentrator away from their mouth or nose, eliminating the need to remove the nasal cannulas, greatly improving the user experience. Furthermore, because the inner diameter of the main tube of the oxygen inhaler is larger than that of the branch tube, when oxygen enters the branch tube from the main tube, the flow path narrows, increasing the gas pressure. This increased pressure significantly boosts the gas flow rate at the outlet of the branch tube. Ultimately, the oxygen exiting the branch tube is ejected in a distinct jet-like pattern with a high concentration. Users simply need to place their mouth or nose in the direction of the oxygen jet to easily obtain a high concentration of oxygen, thus achieving rapid oxygen inhalation. Simultaneously, the branch tube delivers the oxygen-enriched gas from the storage tank to the outlet as much as possible, improving oxygen supply efficiency and preventing the oxygen-enriched gas from dispersing in a large space. This results in a more concentrated oxygen supply, increasing the amount of oxygen inhaled per unit time.

[0013] To prevent the oxygen mouthpiece from being exposed to the elements for extended periods when not in use, thereby improving its cleanliness, the following solution can be chosen: A top cover for accommodating the oxygen mouthpiece is attached to the main body. A chamber is formed between the top cover and the main body, and the oxygen mouthpiece is housed within this chamber. The top cover and the main body can be connected via a flip-top, or through various detachable connection methods such as a hinged lid or threaded connection.

[0014] To ensure a continuous and high-concentration oxygen-enriched gas production in a handheld oxygen concentrator with a compact size, the following solution can be chosen: a pressure-reservoir is integrated into the oxygen supply path between the oxygen generating unit and the oxygen storage tank. During oxygen generation, the oxygen generating unit, represented by a molecular sieve tank, generates pressure in the pressure-reservoir before the oxygen-enriched gas flows into the oxygen storage tank. This maintains the pressure at the oxygen outlet of the molecular sieve tank within a high-pressure range, slowing the airflow velocity into the molecular sieve tank and increasing the contact time between the incoming air and the internal molecular sieve. This allows the molecular sieve to fully adsorb nitrogen from the air, resulting in a higher oxygen concentration in the gas flowing out from the outlet. Thus, even with a reduced molecular sieve tank volume, a high oxygen concentration can still be maintained, ensuring the performance of the handheld oxygen concentrator. Furthermore, by first collecting oxygen in the pressure-reservoir and then supplying it to the oxygen storage tank after reaching a certain pressure, the oxygen concentration in the storage tank becomes more uniform, and the pressure is increased. This allows the oxygen generating unit to continuously produce oxygen-enriched gas in continuous oxygen output mode and also meets the oxygen flow requirements in intermittent oxygen output mode.

[0015] The beneficial effects of this utility model are: 1. By limiting the gripped portion of the handheld oxygen concentrator during use, the device is designed for single-handed operation. Users can simply pick it up with one hand and bring it close to their mouth or nose, allowing the oxygen outlet of the inhalation unit to enter their mouth or nose for contact oxygen delivery. Oxygen is inhaled only when the inhalation unit touches the mouth or nose; it can be removed when not inhaling. The entire handheld oxygen concentrator is designed for single-handed use, making it readily available and convenient to carry. The entire process, from needing oxygen to receiving it, eliminates the cumbersome process of wearing traditional nasal cannulas, enabling quick and easy single-handed oxygen delivery. This solution is particularly suitable for intermittent oxygen use scenarios with short durations but high frequency of oxygen delivery.

[0016] 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 oxygen generation unit to continuously produce oxygen-enriched gas. At the same time, it can increase the pressure of the oxygen-enriched gas in the oxygen storage tank to meet the oxygen injection flow 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.

[0017] 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.

[0018] Fourth, the oxygen nozzle is detachably connected to the machine body, allowing for convenient replacement of the oxygen nozzle. In actual use, multiple people can share the same oxygen generator. When using oxygen, simply attach your corresponding oxygen nozzle to the machine body to receive oxygen. This not only ensures the safety and hygiene of oxygen use but also improves the utilization efficiency of the oxygen generator.

[0019] This invention is particularly suitable for situations where it is necessary to hold the oxygen concentrator with one hand and quickly obtain oxygen. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main components of the oxygen generator of this utility model after disassembly.

[0021] Figure 2 This is a schematic diagram of the molecular sieve tank, the pressurized gas tank, and the oxygen storage tank of this utility model.

[0022] Figure 3 This is a schematic diagram of one embodiment of the oxygen concentrator's top cover, body, and power supply.

[0023] Figure 4 This is a schematic diagram showing the oxygen inhaler of this utility model disassembled into a cover, a main air tube, and branch tubes.

[0024] Figure 5 This is a schematic diagram showing that after the top cover is opened, the oxygen outlet of the oxygen inhalation nozzle is exposed to the outside and begins to supply oxygen.

[0025] Figure 6 This is a schematic diagram showing the relationship between the diameter of the body, the volume of the corresponding oxygen storage tank, and the blood oxygen concentration when the circumference of the cylindrical body of this utility model ranges from 144mm to 270mm.

[0026] The components in the diagram are labeled as follows: Top cover 1, Body 2, Snap-on button 201, Snap-on pivot 202, Snap-on spring 203, Outer shell 204, Air vent 2041, Display window 2043, Button hole 2044, Selection button hole 2045, Display control board 205, Display screen 2051, Button 2052, Selection button 2053, Oil-free compressor pump 206, Oil-free compressor pump upper bracket 207, Oil-free compressor pump lower bracket 208, Two-position four-position Switching valve assembly 209, molecular sieve tank 210, oxygen storage tank 211, backup pressurized gas tank 212, balance valve 213, pulse valve 214, connecting valve 215, lifting rope 216, power supply 3, rotating shaft 4, oxygen nozzle 5, main air pipe 51, branch pipe 52, branch pipe buckle 53, oxygen supply channel 54, oxygen intake section 55, oxygen outlet 56, hood 57, air inlet assembly 6, air outlet assembly 7, displacement sensor 8, oxygen nozzle sensor 9. Detailed Implementation

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

[0028] like Figures 1 to 5 The illustration shows an embodiment of a handheld oxygen concentrator. The overall outline of the oxygen concentrator is approximately cylindrical. From top to bottom, the oxygen concentrator consists of a top cover 1, a body 2, and a power supply 3. The body 2 and the power supply 3 can be fixed as a single unit or be detachably connected. The power supply 3 can also be located in another position on the body 2, meaning it can be integrated into the body 2, and is used to power internal components. If a detachable connection is used, the body 2 and the power supply 3 can be assembled and disassembled using snap-fit ​​or threaded connections. This facilitates timely separation of the body 2 and the power supply 3 when the power supply 3's battery is low, allowing for replacement with a fully charged power supply 3 to ensure the power needs of the devices within the body 2 are met.

[0029] In designing the body 2, to facilitate subsequent use and allow the user to hold it with one hand, the plane perpendicular to the axis of the molecular sieve tank 210 is defined as the first projection plane, which is also the projection reference plane of the body. Simultaneously, the perimeter of the projected outline of the body on the first projection plane is limited to no more than 270mm, which is equivalent to limiting the projected outline of the outer shell 204 of the body 2. When the perimeter of the projected outline does not exceed 270mm, it ensures that the body 2 meets the ergonomic requirements for finger and palm grip, meaning that one hand can firmly hold the body 2 in a gripping posture. Combined with the structure of the body 2 suitable for one-handed use, this allows the user to hold the oxygen concentrator with one hand. The angle for one-handed grip on the body 2 is along the direction of the first projection plane.

[0030] While the smaller size of device 2 offers greater convenience for one-handed use, it also reduces the oxygen concentrator's oxygen supply capacity. When the oxygen supply capacity falls below a certain level, the effect on improving the user's blood oxygen saturation 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 device 2 on the first projection plane is limited to between 144mm and 270mm. Taking a cylindrical form of device 2 as an example... Figure 6This reflects the relationship between the diameter of the body 2, the corresponding volume of the oxygen storage tank 211, and the blood oxygen concentration. It is clear that when the cylindrical body 2 has a circumference ranging from 144mm to 270mm, it achieves good oxygen supply capacity. The oxygen-enriched gas stored in the storage tank can quickly increase the user's blood oxygen concentration, helping to rapidly improve hypoxia symptoms. After the user inhales the stored oxygen, the oxygen concentrator prepares oxygen-enriched gas through the oxygen generation unit and stores it in the storage tank for future use, or it can continuously supply oxygen to help the user maintain blood oxygen concentration. It should be noted that when the circumference of the cylindrical body 2 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, limiting the circumference of the projected outline to the range of 144mm-270mm balances the size for single-handed use and the oxygen concentrator's oxygen supply capacity. Of course, the possibility of further reducing the size while sacrificing oxygen supply capacity cannot be ruled out, but this should be within the scope of easily conceivable technical solutions in this embodiment.

[0031] To prevent issues such as difficulty finding the right grip angle or instability when holding the device with one hand due to an excessively thick or elongated shape, ergonomic principles are applied. The distance between the two furthest points of the projected outline is further 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 2 is circular, elliptical, rectangular, or polygonal. The outer shell 204 of the device 2 can be optimized. For example, ergonomically, curved surfaces can be designed on the outer shell 204 to facilitate one-handed grip, or anti-slip protrusions can be designed to conform to the fingers and palm and prevent the device 2 from slipping when held with one hand. This results in a structure suitable for one-handed use, improving stability and comfort.

[0032] The top cover 1 and the top of the body 2 have an openable and closable structure. Specifically, it can be a flip-top opening and closing structure, or a hinged, threaded, or other similar method. Figure 1In the illustrated embodiment, the top cover 1 and the top of the body 2 are connected by a rotating shaft 4 to achieve a flip-top connection. The top cover 1 rotates around the rotating shaft 4 to open or close. A rotating shaft spring is fitted onto the rotating shaft 4. Under the action of the rotating shaft spring, the top cover 1 remains open until it is pressed or fixed by an external force, at which point it remains closed. Correspondingly, a latching button 201 is provided on the top of the body 2. The latching button 201 is rotatably connected to the top side wall of the body 2 via a latching rotating shaft 202. The latching rotating shaft 202 is horizontally positioned and rotatably located in the middle of the latching button 201. The latching button 201 can rotate around the latching rotating shaft 202, allowing it to move like a seesaw. A locking spring 203 is sleeved on the locking hinge 202. Under the action of the locking spring 203, the portion of the locking button 201 located above the locking hinge 202 is closer to the body 2 than the portion located below the locking hinge 202. When the user presses the portion of the locking button 201 located below the locking hinge 202 with their finger, the aforementioned seesaw effect allows the portion of the locking button 201 located below the locking hinge 202 to move closer to the body 2, while the portion of the locking button 201 located above the locking hinge 202 moves away from the body 2. Therefore, when the portion of the locking button 201 located above the locking hinge 202 is closer to the body 2, that is, when the portion of the locking button 201 located above the locking hinge 202 is engaged and fixed with the top cover 1, the top cover 1 is in the closed state. If the user presses the part of the latching button 201 located below the latching pivot 202, the part of the latching button 201 located above the latching pivot 202 will move away from the top cover 1. The top cover 1, no longer secured by the latching button 201, will automatically open under the action of the pivot spring on the pivot 4, exposing the oxygen nozzle 5 to the user. Taking displacement sensor 8 as an example, simultaneously, displacement sensor 8 receives a signal that the top cover 1 has opened from the body 2. Displacement sensor 8 then opens the solenoid valve controlling the opening and closing of the oxygen supply channel 54. Correspondingly, the oxygen supply channel 54 is opened, and oxygen flows out from the branch tube latch 53 of the oxygen nozzle 5, allowing the user to begin oxygen use. Conversely, after oxygen use, the user can press down on the top cover 1 to re-lock it against the part of the latching button 201 located above the latching pivot 202, thus conveniently closing and locking the top cover 1. Simultaneously, displacement sensor 8 detects a signal that the top cover 1 has closed from the body 2 and then closes the oxygen supply channel 54 with the solenoid valve.

[0033] Figure 2 The diagram shown is a schematic of the molecular sieve tank 210, the pressurized gas tank 212, and the oxygen storage tank 211. Figure 2As shown, the specific structure includes an oil-free compressor pump 206, an inlet assembly 6, an outlet assembly 7, a molecular sieve tank 210, and an oxygen storage tank 211. The gas generated by the oil-free compressor pump 206 as a compressed air source enters the molecular sieve tank 210 through the inlet assembly 6. The oxygen-enriched gas, after being adsorbed by the molecular sieve tank 210, enters the oxygen storage tank 211 through the outlet assembly 7. The outlet assembly 7 includes a gas path structure disposed between the oxygen outlet ends of the two molecular sieve tanks 210 and the oxygen inlet end of the oxygen storage tank 211. A backup pressure tank 212 is provided on the gas path structure. The gas path structure ensures that the oxygen-enriched gas adsorbed by the molecular sieve tanks 210 first enters the backup pressure tank 212 for storage. Only after the gas in the backup pressure tank 212 reaches a preset pressure does it enter the oxygen storage tank 211. The preset pressure is set according to the oxygen production efficiency and the pressure requirements in the oxygen storage tank 211. This pressure is determined at the factory. Generally, once the pressure in the backup pressure tank 212 is determined, this pressure is maintained during the operation of the oxygen generator. The pressurized gas tank 212 can be integrated into the molecular sieve tank 210, the oxygen storage tank 211, or it can be independent of both the molecular sieve tank 210 and the oxygen storage tank 211, as long as the oxygen-enriched gas first enters the pressurized gas tank 212 for pressurization before entering the oxygen storage tank 211. The form of the pressurized gas tank 212 is not limited to a fixed type; it can also be an elastic air bladder or a gas storage chamber installed in the pipeline, etc. To achieve unidirectional flow of oxygen-enriched gas, valves controlling the gas flow can be installed at the inlet and outlet ends of the pressurized gas tank 212. These valves can be one-way valves, pressure valves, or electrically controlled valves, such as pulse solenoid valves, throttle valves, or manual regulating valves. These valves control the gas pressure in the pressurized gas tank 212. Once the pressure reaches a preset level, the oxygen-enriched gas in the pressurized gas tank 212 is injected into the oxygen storage tank 211, ensuring a uniform oxygen concentration. Simultaneously, the increased pressure in the oxygen storage tank 211, after being pressurized by the pressurized gas tank 212 and injected into the oxygen storage tank 211, raises the gas pressure, meeting the injection pressure requirements when supplying oxygen-enriched gas from the storage tank 211. The oxygen-enriched gas in the oxygen storage tank 211 supports both continuous oxygen supply and injection modes. In oxygen injection mode, it can replace conventional oxygen cylinders and be used as an oxygen injection cylinder that can regenerate oxygen. Thus, by adding a backup pressurized gas tank 212, the need for large-volume oxygen injection in a short period of time can be met.

[0034] Figure 4The illustration shows one embodiment of the oxygen nozzle 5. The oxygen nozzle 5 includes a main air tube 51, the outer diameter of which is slightly smaller than the diameter of the inner hole of the oxygen supply channel 54, facilitating insertion and removal of the main air tube 51 into the oxygen supply channel 54, thus enabling convenient installation and removal between the oxygen nozzle 5 and the oxygen supply channel 54. An oxygen nozzle sensor 9 detects whether the main air tube 51 is properly assembled. Upon detection, it transmits a signal to the display screen 2051 of the display control board 205 and issues a confirmation message. Two branch tubes 52 are symmetrically arranged on the main air tube 51, with a diameter smaller than that of the main air tube 51, and are connected to the main air tube 51. Each branch tube 52 has a branch tube clip 53 at its end, which engages with a groove on the inner wall of the oxygen intake part 55, thereby connecting the branch tube 52 to the oxygen intake part 55 to form the oxygen nozzle 5. Of course, the oxygen nozzle 5 can also be replaced with a small oxygen mask, with the inlet of the oxygen mask connected to the oxygen supply channel 54. Whether it's the oxygen nozzle 5 or the oxygen mask, it must be able to be positioned within the cavity formed by the top cover 1 and the body 2 after the top cover 1 is closed. The oxygen nozzle 5 can be made of flexible materials such as silicone or fluorosilicone. During real-time oxygen use, oxygen enters the main air pipe 51 from the oxygen supply channel 54, and is then evenly distributed to the branch pipes 52 on both sides of the main air pipe 51. The inner diameter of the main air pipe 51 is larger than the inner diameter of the branch pipes 52, which increases the oxygen pressure after entering the branch pipes 52 from the main air pipe 51, thereby increasing the flow rate of oxygen ejected from the outlet of the branch pipes 52.

[0035] Regarding the specific structure of body 2, such as Figure 1As shown, the main body 2 first includes an outer shell 204, which is a cylindrical shell. The outer shell 204 has air vents 2041 for air intake and heat dissipation. The outer shell 204 is equipped with a display window 2043, buttons 2044, and selection buttons 2045. Correspondingly, a display control board 205 is located inside the outer shell 204. The display control board 205 is equipped with a display screen 2051, a button signal detection circuit 2052, and a selection button signal detection circuit 2053. The display screen 2051 is located within the display window 2043. Buttons 2044 and 2045 are correspondingly located within the button signal detection circuit 2052, and selection buttons 2045 and 2045 are correspondingly located within the selection button signal detection circuit 2053. Functionally, the display window 2043 displays information related to the oxygen concentrator, such as battery level, oxygen concentration, altitude, and flow rate, allowing users to easily understand the operating status of the oxygen concentrator. Buttons 2044 control the oxygen concentrator to turn on and off. Selecting button 2045 switches the oxygen generator's operating mode. An oil-free compressor pump 206 is also installed inside the outer casing 204. The upper support 207 and lower support 208 of the oil compressor pump are fixedly connected to the inner wall of the outer casing 204. The oil-free compressor pump 206 is positioned between the upper support 207 and the lower support 208 for stable fixation. To further reduce vibration and noise during operation, a foam pad can be added between the oil-free compressor pump 206 and the upper and lower supports 207 and 208. A two-position four-way switching valve assembly 209 is installed at the air inlet of the molecular sieve tank 210, enabling switching between oxygen delivery and nitrogen emission from the molecular sieve tank 210. The balancing valve 213 assists in nitrogen discharge during system operation, the pulse valve 214 controls the way and time of oxygen flow to the user during system operation, and the connecting valve 215 connects the oxygen storage tank 211 and the backup pressure tank 212 under the control of the display control panel 205.

[0036] For oxygen concentrators, oxygen production can be controlled in several ways: 1. Pressing button 2044 immediately starts oxygen production. 2. After pressing button 2044, the system simultaneously checks whether the top cover 1 is open or closed. If the top cover 1 is open, oxygen production will only start after the top cover 1 is closed; this is a delayed start method. This improves comfort, as there will be no noise during oxygen production. 3. After pressing button 2044, the system simultaneously checks the pressure inside the oxygen tank. Oxygen production will only start when the pressure inside the oxygen tank is below the maximum pressure. Generally, the maximum pressure inside the oxygen tank can be set to 110 kPa. Regardless of the method used to control oxygen production, the top cover 1 must be open to dispense oxygen. There are several ways to output oxygen from an oxygen concentrator: 1. After opening the top cover 1, oxygen supply is directly provided via the oxygen nozzle 5 or oxygen mask; after closing the top cover 1, oxygen supply is immediately stopped via the oxygen nozzle 5 or oxygen mask. As the most basic oxygen supply method, oxygen supply begins immediately upon opening the top cover and stops immediately upon closing it. The entire oxygen use process is convenient and simple, fulfilling the user's need for rapid oxygen supply and quick separation between the oxygen concentrator and the user.

[0037] 2. An oxygen injection button is installed on the main body 2, or the oxygen injection button is set to one of the working modes controlled by the selection button 2045. After the top cover 1 is opened and the oxygen injection button is pressed, the oxygen intake unit will inject oxygen. In actual use, both the "top cover is open" and "oxygen injection button is pressed" conditions must be met simultaneously for oxygen to be injected, effectively preventing oxygen from being injected due to accidental activation of the oxygen injection button when the top cover is not open.

[0038] Third, a respiratory detection sensor is installed in the cavity formed by the upper cover 1 and the body 2. When the upper cover 1 is opened and the respiratory detection sensor detects the user's exhaled air, the oxygen inhalation unit supplies oxygen. When there is no need for oxygen, even if the upper cover is accidentally opened, the distance between the user's nose and the oxygen inhalation unit is too great for the respiratory detection sensor to detect the user's breath. Therefore, even if the upper cover is opened, the oxygen inhalation unit will not supply oxygen. Oxygen is only supplied when the respiratory detection sensor detects the user's breath. This prevents oxygen waste caused by accidental opening of the upper cover when there is no need for oxygen.

Claims

1. A handheld oxygen concentrator, comprising a body (2) and a compressed air source, an oxygen generation unit, and an oxygen storage tank (211) integrated within the body (2), wherein oxygen-enriched gas generated by the oxygen generation unit is delivered to the oxygen storage tank (211) for storage, and the body (2) integrates a power supply (3), characterized in that: The body (2) is designed for single-handed use; The perimeter of the projected outline of the body (2) on the first projection plane does not exceed 270mm. The body (2) is provided with an oxygen inhalation nozzle (5) for direct contact with the mouth or nose. The oxygen inhalation nozzle (5) is connected to the oxygen storage tank (211).

2. The handheld oxygen concentrator as described in claim 1, characterized in that: The perimeter of the projected outline of the body (2) on the first projection plane ranges from 144 mm to 270 mm.

3. The handheld oxygen concentrator as described in claim 1, characterized in that: The distance between the two furthest points of the projected outline of the body (2) on the first projection plane is less than 100mm.

4. The handheld oxygen concentrator as described in any one of claims 1 to 3, characterized in that: The body (2) is equipped with a button. When the button is pressed, the oxygen-enriched gas in the oxygen storage tank (211) is sprayed out through the oxygen inhalation nozzle (5).

5. The handheld oxygen concentrator as described in any one of claims 1 to 3, characterized in that: The cross-sectional shape of the body (2) is one of the following: circular, elliptical, rectangular or polygonal.

6. The handheld oxygen concentrator as described in any one of claims 1 to 3, characterized in that: The oxygen inhalation nozzle (5) is detachably connected to the body (2).

7. The handheld oxygen concentrator as described in claim 6, characterized in that: The oxygen inhalation nozzle (5) is made of a flexible material.

8. The handheld oxygen concentrator as described in claim 6, characterized in that: The oxygen inhalation nozzle (5) includes a cover (57) and a branch pipe. The cover (57) is provided with an oxygen inhalation part (55) extending outward, and the oxygen inhalation part (55) has an oxygen outlet (56). The branch pipe includes a main pipe (51) for connecting to the oxygen storage tank (211) and branch pipes (52) extending to the oxygen outlet (56) respectively. The inner diameter of the main pipe (51) is larger than the inner diameter of the branch pipe (52).

9. The handheld oxygen concentrator as described in any one of claims 1 to 3, characterized in that: The body (2) is connected to a cover (1) for accommodating the oxygen inhalation nozzle (5).

10. The handheld oxygen concentrator as described in any one of claims 1 to 3, characterized in that: The oxygen generating unit and the oxygen storage tank have an integrated pressure tank (212) on their oxygen supply lines.

Images