Integrated special-shaped oxygen storage tank and assembly for portable oxygen generator

Abstract

The invention discloses an integrated special-shaped oxygen storage tank and assembly for a portable oxygen generator, and belongs to the technical field of portable oxygen generators. The oxygen storage tank comprises an upper shell and a lower shell which are detachably, fixedly and hermetically connected, and the upper shell and the lower shell are enclosed to form an internal cavity for storing oxygen; the top of the upper shell is divided into an air inlet end and an air outlet end, an air inlet hole is formed in the air inlet end, and an oxygen outlet cavity is formed in the air outlet end; an oxygen detection hole and a pulse valve mounting seat are arranged between the air inlet end and the air outlet end; a pressure equalizing valve mounting groove is formed in the outer side of the air inlet hole, and a sensing connecting hole is formed in the outer side of the pulse valve mounting seat; a plurality of fixing holes used for being connected with a bottom component are formed in the bottom of the lower shell. Meanwhile, the invention further provides an integrated assembly comprising the oxygen storage tank. The oxygen storage tank and the molecular sieve tank are separately arranged, and a one-way valve, a pressure equalizing valve, a pulse valve, a bacterial filter and other parts can be integrated, so that the integration level is improved, and the molecular sieve tank can be quickly replaced.

Description

Technical Field

[0001] This invention belongs to the field of portable oxygen concentrator technology, specifically relating to an integrated irregularly shaped oxygen storage tank and components for a portable oxygen concentrator. Background Technology

[0002] Portable oxygen concentrators are small devices, particularly suitable for outdoor activities and other scenarios where larger oxygen concentrators are inconvenient or impossible to deliver. To enhance portability, the integration and compactness of the internal structure are crucial for these machines. Currently, portable oxygen concentrators are primarily based on the principle of pressure adsorption and depressurization desorption using molecular sieves. These machines mainly consist of a molecular sieve tank, an oxygen storage tank, an air compressor, a power supply, control valves, various valves, a housing, control components, and gas flow piping. To improve overall integration, the components of portable oxygen concentrators are tightly integrated. For example, the commonly seen dual-tower molecular sieve tank is often combined with the oxygen storage tank to form an integrated molecular sieve tank assembly. Furthermore, control valves and check valves are integrated into the upper and lower end caps of the molecular sieve tank.

[0003] However, in daily use, it has been found that the molecular sieve container is the part with the shortest service life in portable molecular sieve oxygen generators. When the molecular sieve in the container loses or significantly reduces its oxygen separation efficiency, the container needs to be replaced promptly. However, because the molecular sieve container is highly integrated with other components, replacing it often requires disassembling the outer shell, power supply, inner casing, and various valves and pipes connected to the container. This makes the replacement procedure cumbersome and complex, causing inconvenience to users.

[0004] To address the issue of molecular sieve replacement, existing patent CN220531143U discloses a molecular sieve tank replacement structure for a portable oxygen concentrator. This structure primarily uses a butterfly bolt and threaded hole connection between the molecular sieve tank lid and body, facilitating disassembly and installation during replacement. However, this structure clearly doesn't solve the problem of the complex procedure for removing the molecular sieve tank from the portable oxygen concentrator, and the molecular sieve tank assembly still integrates the dual molecular sieve tanks and the oxygen storage tank into one unit. Replacing the molecular sieve tank assembly inevitably requires removing the oxygen storage tank simultaneously. Inside the portable oxygen concentrator, the oxygen storage tank is connected to components such as the oxygen output pipeline. Replacing the molecular sieve also necessitates removing these connected components, which is undoubtedly inconvenient for disassembly and assembly. Furthermore, as an essential component of molecular sieve oxygen concentrators, the oxygen storage tank is often a relatively regular cylindrical or near-cylindrical shape, and its occupied space is generally difficult to change. Currently, in order to reduce the size of portable oxygen concentrators, there is a tendency to reduce the size of the oxygen storage tank. Obviously, reducing the size of the oxygen storage tank will inevitably lead to a reduction in the oxygen storage capacity of the oxygen concentrator.

[0005] Therefore, the structure and arrangement of the oxygen storage tank, which is connected to the molecular sieve tank, are very important for improving the rapid replacement of the molecular sieve tank in portable oxygen generators, increasing the integration of portable oxygen generators, and further reducing the size of portable oxygen generators. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] This invention aims to solve one of the following technical problems existing in the prior art or related technologies:

[0008] In the existing internal structure of portable oxygen generators, the structure and installation location of the oxygen storage tank are not conducive to the rapid replacement of the molecular sieve tank. Furthermore, there are issues regarding how to ensure the integration and connection stability of the internal structure of the portable molecular sieve when the structure and installation location of the oxygen storage tank are changed.

[0009] (II) Technical Solution

[0010] To solve the above-mentioned technical problems, the present invention provides an integrated irregularly shaped oxygen storage tank and components for a portable oxygen concentrator, and the specific technical solution adopted is as follows:

[0011] An integrated, irregularly shaped oxygen storage tank for a portable oxygen concentrator includes a detachably fixed and sealed upper shell and a lower shell, which together form an internal cavity for storing oxygen. The top of the upper shell is divided into an air inlet and an air outlet, with an air inlet hole at the air inlet and an oxygen outlet chamber at the air outlet. An oxygen detection hole and a pulse valve mounting seat are provided between the air inlet and the air outlet. A pressure equalization valve mounting groove is provided on the outside of the air inlet, and a sensor connection hole is provided on the outside of the pulse valve mounting seat. The bottom of the lower shell has multiple fixing holes for connecting to bottom components.

[0012] Preferably, a plurality of storage connection posts are provided on the outside of the air inlet; an oxygen detection connection post is provided between the storage connection posts and the oxygen detection port; and a sensing connection post is provided on the outside of the sensing connection port.

[0013] Preferably, a connection hole communicating with the outside of the oxygen storage tank is provided inside the oxygen outlet chamber; and multiple oxygen outlet transfer fixing holes are evenly distributed on the outside of the oxygen outlet chamber.

[0014] Preferably, a sensor positioning post is provided on the outside of the sensor connection hole, an oxygen outlet transition positioning post is provided on the outside of the oxygen outlet chamber, and a lower shell positioning post and a partition groove are provided at the bottom of the lower shell; the partition groove is used to fit into the corresponding structure of the tank partition.

[0015] Another object of the present invention is to provide an assembly containing the above-mentioned integrated irregular-shaped oxygen storage tank. The assembly includes an oxygen outlet transfer structure, an oxygen storage transfer structure, an oxygen detection tube, a pulse valve, a sensor, and a one-way valve integrated into the upper shell, as well as a bacterial filter and an internal connecting pipe integrated inside the oxygen storage tank. The oxygen storage transfer structure is connected to the oxygen storage cavity inside the oxygen storage tank in sequence through the one-way valve and the upper shell. The bacterial filter located in the oxygen storage cavity is connected to the pulse valve through the air outlet pipe and the upper shell. The pulse valve is connected to the internal connecting pipe through the upper shell. The outlet of the internal connecting pipe is connected to the oxygen detection tube through the upper shell. The oxygen detection tube is connected to the oxygen outlet transfer structure. Finally, oxygen is supplied to the outside through the oxygen outlet transfer structure.

[0016] Preferably, the component further includes a pressure equalization valve and a sensor; the oxygen storage adapter structure includes an upper oxygen storage adapter shell and a lower oxygen storage adapter shell; the oxygen outlet adapter structure includes an oxygen outlet adapter cover and an oxygen outlet connector; the oxygen outlet adapter cover is fixed to the upper part of the oxygen outlet chamber of the upper shell through an oxygen outlet adapter fixing hole, and the oxygen outlet connector is installed on the oxygen outlet adapter cover; the lower oxygen storage adapter shell is fixedly connected to the upper shell through a lower connecting column, and the upper oxygen storage adapter shell is fixedly connected to the lower oxygen storage adapter shell, the upper and lower oxygen storage adapter shells enclose each other to form two independent oxygen inlet cavities; a one-way valve hole corresponding to the position of the air inlet hole is provided in the oxygen inlet cavity; the two one-way valves The oxygen inlet cavity is located between two one-way valve holes and two air inlets. It also has a pressure equalization valve hole connected to a pressure equalization valve installed in a pressure equalization valve mounting slot. Two oxygen inlet pipe connectors, each connected to one of the two oxygen inlet cavities, are located on the lower shell of the oxygen storage adapter. Oxygen separated from the molecular sieve tank enters the oxygen inlet cavity through these connectors, then passes through the one-way valve and air inlets before entering the oxygen storage tank. The oxygen detection tube's inlet is connected to the oxygen detection outlet, and its outlet is connected to the oxygen outlet cavity through the oxygen outlet adapter cover, thus transporting oxygen from the storage tank to the outlet cavity. The sensor is connected to the upper shell of the oxygen storage tank through a sensor connection hole.

[0017] Preferably, the bottom of the oxygen outlet adapter cover is provided with an adapter cover cavity that matches the oxygen outlet chamber; the adapter cover cavity is provided with an oxygen outlet hole and an oxygen inlet hole, the oxygen inlet hole of the adapter cover is connected to the oxygen outlet hole of the oxygen detection tube; the upper part of the oxygen outlet adapter cover is provided with an oxygen outlet riser that is connected to the oxygen outlet hole of the adapter cover, and the oxygen outlet connector is connected to the oxygen outlet riser.

[0018] Preferably, the lower shell of the oxygen storage adapter is provided with two independent T-shaped oxygen inlet chambers. A one-way valve hole is provided at the end of the longitudinal chamber of the T-shaped oxygen inlet chamber. The oxygen inlet pipe connector is connected to one end of the transverse chamber, and the pressure equalization valve hole is connected to the other end of the transverse chamber. A storage side groove is provided on the outside of the two oxygen inlet chambers. Storage positioning posts are provided on both sides of the storage side groove.

[0019] More preferably, the bottom of the upper oxygen storage adapter shell is provided with a ring of upper storage protrusions, and two upper storage positioning holes are provided on the outer side of the upper storage protrusions; when the upper oxygen storage adapter shell is connected to the lower oxygen storage adapter shell, the upper storage protrusions are inserted into the lower storage side groove, and the lower storage positioning pins are inserted into the upper storage positioning holes. A sealing ring is provided in the groove to achieve a seal.

[0020] Preferably, the component further includes a pressure relief valve; the oxygen outlet chamber of the upper shell of the oxygen storage tank is provided with a first connection hole and a second connection hole; the first connection hole is connected to a sensor on the main control board of the oxygen generator through a pipeline; the second connection hole is connected to the pressure relief valve through a pipeline.

[0021] (III) Beneficial Effects

[0022] Compared with the prior art, the beneficial effects obtained by the present invention are as follows:

[0023] I. By adopting a combined upper and lower shell assembly method, an independent, non-standard oxygen storage tank can be assembled, detached from the molecular sieve tank, avoiding the need to remove the oxygen storage tank along with the molecular sieve tank when replacing it. Since the oxygen storage tank is no longer integrated with the molecular sieve tank, it provides a physical structural basis for independent replacement of the molecular sieve tank when needed. Simultaneously, by setting multiple connection structures on the oxygen storage tank, it is possible to integrate valve control components such as one-way valves, pressure equalizing valves, and pulse valves, oxygen storage and oxygen outlet transition components, as well as connecting or installing sensor detection components, which helps improve the integration of the internal structure of the portable oxygen generator. Furthermore, multiple interlocking structures are provided on the outside of the oxygen storage tank for connecting with adjacent components such as the air compressor housing and tank compartment partitions, which facilitates the positioning of parts during assembly and improves the connection stability of the internal structure during use.

[0024] Second, by providing an air inlet and fixing holes for the oxygen storage adapter on the upper shell of the oxygen storage tank, the installation of the adapter is facilitated. The adapter connects to the upper cover of the molecular sieve tank via a pipe connector. The molecular sieve tank can be connected via a plug-in connection at the pipe connector for quick replacement. The oxygen storage tank and its components remain in their initial connection state unaffected by molecular sieve tank replacement. Simultaneously, the internal cavity of the oxygen outlet adapter, along with valve holes for connecting to the check valve and equalizing valve, optimizes the layout of the oxygen generator's gas path and improves the utilization rate of the internal space of the oxygen generator casing.

[0025] Third, by setting an oxygen outlet chamber at the oxygen outlet end of the oxygen storage tank's upper shell, and providing a first and second connection hole within the outlet chamber, the oxygen outlet side can be connected to the main control board and the pressure relief valve. On one hand, key status information of the output oxygen can be collected through temperature or pressure sensors integrated on the main control board; on the other hand, the pressure inside the oxygen storage tank can be controlled by connecting the pressure relief valve, preventing excessive pressure. Furthermore, a sensor connection hole is provided on the upper part of the upper shell for connecting other sensors, such as those for oxygen concentration.

[0026] Fourth, by integrating the bacterial filter and internal connecting pipe inside the oxygen storage tank, the problem of having to increase the size of the oxygen generator to accommodate the bacterial filter is avoided. This innovative design achieves a two-in, two-out oxygen flow path within the storage tank. Specifically, oxygen enters the storage cavity of the oxygen storage tank for the first time through the oxygen transfer structure and a one-way valve. After being filtered by the bacterial filter within the storage cavity, it exits the internal cavity of the storage tank for the first time through the upper shell and enters the pulse valve. Subsequently, oxygen re-enters the internal cavity of the storage tank through the pulse valve; to avoid mixing with unfiltered oxygen, the re-entering oxygen is transported through the internal connecting pipe, then exits the internal cavity of the storage tank again through the oxygen detection port on the upper shell and enters the external oxygen detection pipe. Finally, it enters the outlet cavity through the oxygen detection pipe. This "two-in, two-out" oxygen flow path, on the one hand, ensures the basic function of oxygen storage through the irregularly shaped space inside the storage tank, and on the other hand, efficiently integrates multiple components inside and outside the storage tank, significantly improving space utilization. At the same time, this design not only does not reduce the volume of the oxygen storage tank, but also uses a larger oxygen storage tank than conventional portable oxygen concentrators; while breaking through existing design ideas, it does not reduce the oxygen storage capacity of the oxygen concentrator, but can simultaneously improve the oxygen output capacity and the integration of the internal structure. Attached Figure Description

[0027] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0028] Figure 1 The diagram schematically shows a top view of the upper shell of an oxygen storage tank in a preferred embodiment of the present invention.

[0029] Figure 2 A perspective view of the upper shell of an oxygen storage tank in a preferred embodiment of the present invention is shown schematically.

[0030] Figure 3 A schematic top view of the lower shell of an oxygen storage tank according to a preferred embodiment of the present invention is shown.

[0031] Figure 4 for Figure 3 A schematic diagram of the three-dimensional structure.

[0032] Figure 5 A perspective view of the lower shell of the oxygen storage tank in another preferred embodiment of the present invention is shown schematically.

[0033] Figure 6 A perspective view of the oxygen outlet adapter cover of an oxygen storage tank assembly according to a preferred embodiment of the present invention is shown schematically.

[0034] Figure 7The diagram schematically shows a top view of the oxygen outlet adapter cover of an oxygen storage tank assembly according to a preferred embodiment of the present invention.

[0035] Figure 8 The diagram schematically shows a top view of the oxygen storage adapter lower shell of an oxygen storage tank assembly according to a preferred embodiment of the present invention.

[0036] Figure 9 for Figure 8 A three-dimensional image.

[0037] Figure 10 The diagram schematically shows a bottom view of the oxygen storage adapter lower shell of an oxygen storage tank assembly according to a preferred embodiment of the present invention.

[0038] Figure 11 The diagram schematically shows a top view of the oxygen storage adapter shell of an oxygen storage tank assembly in a preferred embodiment of the present invention.

[0039] Figure 12 for Figure 11 The image shows a bottom view of the oxygen storage adapter shell.

[0040] Figure 13 A partial perspective view of an oxygen storage tank assembly installed in a portable oxygen generator according to a preferred embodiment of the present invention is shown schematically.

[0041] Figure 14 for Figure 13 The preferred embodiment shown is a perspective view of the oxygen storage tank assembly mounted on a portable oxygen generator.

[0042] Figure 15 This is a partial perspective view of an oxygen storage tank assembly installed in a portable oxygen generator (excluding the upper shell) according to a preferred embodiment of the present invention.

[0043] Figure 16 for Figure 15 A color rendering.

[0044] The reference numerals used in the above figures are as follows:

[0045] 100, Upper shell; 200, Lower shell; 300, Oxygen outlet adapter cover; 400, Oxygen storage adapter lower shell; 500, Oxygen storage adapter upper shell; 600, Oxygen outlet connector; 700, Oxygen detection tube; 800, Check valve; 900, Bacterial filter.

[0046] 101, Air inlet; 102, Oxygen detection port; 103, Pulse valve mounting hole; 104, Pulse valve connection hole; 105, Oxygen outlet adapter fixing hole; 106, Lower shell fixing hole; 107, Oxygen outlet chamber; 108, First connection hole; 109, Second connection hole; 110, Oxygen outlet adapter positioning post; 111, Sensor connection hole; 112, Storage connection post; 113, Oxygen detection connection post; 114, Sensor positioning post; 115, Sensor connection post; 116, Pressure equalizing valve mounting slot;

[0047] 201, Oxygen storage chamber; 202, Upper shell fixing hole; 203, Lower shell side groove; 204, Positioning ridge; 205, Lower shell first fixing hole; 206, Lower shell second fixing hole; 207, Partition groove; 208, Lower shell positioning post;

[0048] 301, Adapter cover body; 302, Adapter cover fixing hole; 303, Oxygen outlet riser; 304, Adapter cover connecting column; 305, Adapter cover positioning hole; 306, Adapter cover cavity; 307, Adapter cover oxygen outlet hole; 308, Adapter cover oxygen inlet hole.

[0049] 401, Oxygen inlet pipe connector; 402, Upper storage connection hole; 403, Oxygen inlet chamber; 404, Lower storage fixing hole; 405, Lower storage positioning post; 406, One-way valve hole; 407, Pressure equalizing valve hole; 408, Lower storage side groove; 409, Pressure equalizing valve fixing hole;

[0050] 501, Lower connection hole; 502, Upper positioning hole; 503, Upper cavity; 504, Upper protrusion.

[0051] D1, Molecular sieve tank; D2, Tank partition; D3, Oxygen inlet pipe; D4, Display screen; D5, Display and control board; D6, Fan; D7, Pressure relief valve; D8, Air compressor cover; D9, Main control board; D10, Pressure equalizing valve; D11, Pulse valve; D12, Internal connecting pipe; D13, Sealing ring. Detailed Implementation

[0052] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0053] In the following description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and "vertical" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0054] In the following description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0055] Furthermore, in the following description of the present invention, unless otherwise stated, "multiple", "multiple groups", and "multiple roots" mean two or more.

[0056] Figure 1 A schematic top view of the upper shell of an oxygen storage tank according to a preferred embodiment of the present invention is shown. From Figure 1 As can be seen, in this preferred embodiment, the upper shell 100 of the oxygen storage tank is provided with multiple connecting structures. At the top is a rectangular pressure equalization valve mounting groove 116 for mounting the pressure equalization valve D10. Below the pressure equalization valve mounting groove 116 are two air inlets 101, through which oxygen separated from the molecular sieve tank enters the oxygen storage tank. In the middle of the upper shell 100 is an oxygen detection port 102, through which oxygen from the oxygen storage tank enters an oxygen detection tube for detection and then flows out. In the lower middle part of the upper shell 100 is a pulse valve mounting section for mounting the pulse valve D11. This pulse valve mounting section has four pulse valve mounting holes 103 for fixing the pulse valve, and two pulse valve connection holes 104 communicating with the oxygen storage tank in the middle.

[0057] Below the pulse valve mounting section is a V-shaped oxygen outlet chamber 107. Oxygen enters the outlet chamber 107 after passing through the oxygen detection tube and finally flows out from the oxygen supply interface of the oxygen generator. Additionally, the outlet chamber 107 has two connection holes: a first connection hole 108 and a second connection hole 109. The first connection hole 108 connects to a sensor on the main control board via a pipeline, allowing for the detection of oxygen temperature or other parameters. The second connection hole 109 connects to a pressure relief valve via a pipeline to prevent excessive pressure in the oxygen storage tank. A ring of seven oxygen outlet adapter fixing holes 105 is provided on the outer side of the outlet chamber 107 for connecting an oxygen outlet adapter cover. Additionally, two oxygen outlet adapter positioning posts 110 are provided on the outer side of the outlet chamber 107 to facilitate positioning during the installation of the oxygen outlet adapter cover, improving assembly efficiency.

[0058] In addition, a ring of lower shell fixing holes 106 is provided around the edge of the upper shell 100 for aligning with the corresponding fixing holes on the lower shell and then connecting bolts or screws for secure connection. At the same time, a sensor connection hole 111 communicating with the inside of the oxygen storage tank is also provided on the left side of the pulse valve mounting part for connecting other sensors, such as sensors that detect technical parameters such as oxygen concentration, pressure or temperature inside the oxygen storage tank.

[0059] Figure 2 A perspective view of the upper shell of an oxygen storage tank according to a preferred embodiment of the present invention is shown schematically. Figure 2 As can be seen, in this preferred embodiment, the top of the upper cover 100 is not flat, but partially flat, with most of the edge areas having raised structures. Four lower storage connecting posts 112 are provided around the air inlet 101 for connecting to the oxygen storage adapter lower shell. Similarly, two oxygen detection connecting posts 113 are provided between the air inlet 101 and the oxygen detection port 102 for connecting the oxygen detection tube. For connecting the sensor, sensing connecting posts 115 are provided on both sides of the sensing connecting port 111. To facilitate positioning of the connecting components before tightening, multiple positioning post structures are provided on the upper shell 100. For example, two oxygen outlet adapter positioning posts 110 are provided on the outside of the oxygen outlet chamber 107 for positioning the oxygen outlet adapter cover. For positioning the sensor with the circuit board before tightening, two sensing positioning posts 114 are provided between the sensing connecting posts 115.

[0060] Figure 3 A schematic top view of the lower shell of an oxygen storage tank according to a preferred embodiment of the present invention is shown. Figure 4 for Figure 3 A schematic diagram of the three-dimensional structure. From Figure 3 and Figure 4 As can be seen, in this preferred embodiment, the shape of the lower shell 200 is basically the same as that of the upper shell 100, except that a notch is provided in the lower right corner, corresponding to the oxygen outlet chamber 107, so that the pipeline leading out from the connection hole of the oxygen outlet chamber 107 can be connected to components such as the pressure relief valve and the main control board. An upper shell fixing hole 202 is provided on the edge of the lower shell 200, corresponding to the position of the lower shell fixing hole 106 of the upper shell 100, so that the upper and lower shells can be fastened by bolts passing through them. At the same time, a lower shell side groove 203 is provided on the inner side of the upper shell fixing hole 202, for engaging and fixing with the corresponding protrusion of the upper shell. To achieve stable connection and accurate positioning, multiple positioning ridges 204 are also provided on the inner side of the lower shell side groove 203. The main body of the lower shell 200 is the recessed oxygen outlet chamber 201, which constitutes the main body for storing oxygen. To facilitate the connection between the oxygen storage tank and the air compressor cover at the bottom, a first fixing hole 205 for the lower shell 200 is also provided on the bottom side of the lower shell 200.

[0061] Figure 5 A perspective view of the lower shell of the oxygen storage tank according to another preferred embodiment of the present invention is schematically shown. From Figure 5 As can be seen, in this preferred embodiment, three fixing holes are provided on the bottom side of the lower shell 200 for fixed connection with the air compressor housing. One (i.e., the first fixing hole 205) is located in the middle of the side of the lower shell 200, and the other two (i.e., the second fixing holes 206) are located at opposite ends, forming a triangle that, when connected, creates a stable structure. To facilitate assembly and positioning and increase connection stability, a lower shell positioning post 208 is also provided at the bottom of the lower shell. A corresponding groove structure is provided on each side of the bottom of the lower shell 200, with a partition groove 207 located on the air inlet side, facilitating a fitting connection with the corresponding structure on the tank partition.

[0062] Figure 6 A perspective view of the oxygen outlet adapter cover of an oxygen storage tank assembly according to a preferred embodiment of the present invention is shown schematically. Figure 6 As can be seen, in this preferred embodiment, the oxygen outlet adapter cover 300 is installed at the oxygen outlet chamber 107 of the upper shell 100. An oxygen outlet riser 303 communicating with the oxygen outlet chamber 107 is provided on the upper part of the oxygen outlet adapter cover 300. This riser 303 connects to the oxygen outlet connector to achieve the delivery of separated oxygen. To achieve a fixed connection with the upper shell 100, a ring of seven adapter cover fixing holes 302 is provided around the edge of the adapter cover body 301. During installation, these fixing holes 302 are aligned with the oxygen outlet adapter fixing holes 105 on the upper shell 100 and fixedly connected using bolts. Furthermore, two adapter cover connecting posts 304 are also provided on the upper part of the oxygen outlet adapter cover 300 to facilitate connection to one side of the circuit board attached to the oxygen detection tube.

[0063] Figure 7 A schematic top view of the oxygen outlet adapter cover of an oxygen storage tank assembly according to a preferred embodiment of the present invention is shown. From Figure 7 As can be seen, in this preferred embodiment, a V-shaped adapter cavity 306 matching the oxygen outlet chamber 107 is provided on the bottom surface of the oxygen outlet adapter 300. The adapter cavity 306 contains an oxygen outlet hole 307 and an oxygen inlet hole 308: the former communicates with the oxygen outlet riser 303, serving as the oxygen outlet of the oxygen outlet chamber; the latter communicates with the outlet of the oxygen detection pipe, serving as the oxygen inlet of the oxygen outlet chamber. Simultaneously, the oxygen outlet adapter positioning post 110 on the upper shell 100 is connected, and a corresponding adapter positioning hole 305 is provided on the oxygen outlet adapter 300. When installing the oxygen outlet adapter 300, the positions of the adapter fixing hole 302 and the oxygen outlet adapter fixing hole 105 can be aligned first by the cooperation between the oxygen outlet adapter positioning post 110 and the adapter positioning hole 305.

[0064] Figure 8 The diagram schematically shows a top view of the oxygen storage adapter lower shell of an oxygen storage tank assembly according to a preferred embodiment of the present invention. Figure 9 for Figure 8 A three-dimensional image. From Figure 8and Figure 9 As can be seen, in this preferred embodiment, the structure of the oxygen storage adapter lower shell 400 is similar to a butterfly shape. Two T-shaped oxygen inlet chambers 403 are arranged side-by-side in its middle. At the longitudinal end of the oxygen inlet chamber 403 is a one-way valve hole 406 corresponding to the air inlet port 101, facilitating the installation of a one-way valve 800 at the corresponding position. One end of the transverse chamber of the oxygen inlet chamber 403 communicates with an outwardly extending oxygen inlet pipe connector 401, and the other end of the transverse chamber is provided with a pressure equalization valve hole 407 for connecting to the pressure equalization valve D10. Simultaneously, for connection with the bottom upper shell 100, four storage fixing holes 404 are provided in the oxygen storage adapter lower shell 400, with positions corresponding to the storage connection post 112.

[0065] To connect with the upper oxygen storage adapter shell 500, the lower oxygen storage adapter shell 400 is also provided with six internally threaded upper oxygen storage connection holes 402. To form two independent oxygen inlet chambers by connecting with the upper oxygen storage adapter shell 500, a ring of lower oxygen storage side grooves 408 is provided on the outside of the two T-shaped oxygen inlet chambers 403.

[0066] Figure 10 A bottom view schematically illustrates the oxygen storage adapter lower shell of an oxygen storage tank assembly according to a preferred embodiment of the present invention. From Figure 10 It is understood that, in this preferred embodiment, in order to achieve a fixed connection with the equalizing valve D10, two equalizing valve fixing holes 409 are provided on both sides of the equalizing valve hole 407 at the bottom of the oxygen storage transfer shell 400.

[0067] Figure 11 The diagram schematically shows a top view of the oxygen storage adapter shell of an oxygen storage tank assembly in a preferred embodiment of the present invention. Figure 12 for Figure 11 The image shows a top view of the oxygen storage adapter shell. From... Figure 11 and Figure 12 As can be seen, in this preferred embodiment, the edge of the oxygen storage adapter upper shell 500 is provided with six storage connection holes 501, the positions of which correspond to the storage connection holes 402 on the oxygen storage adapter lower shell 400. Simultaneously, the oxygen storage adapter upper shell 500 is also provided with storage positioning holes 502 for engaging with storage positioning posts 405 on the oxygen storage adapter lower shell 400. The oxygen storage adapter upper shell 500 is provided with a storage concave cavity 503 that matches two T-shaped oxygen inlet chambers 403, and a storage convex ridge 504 is located on the outer side of the storage concave cavity 503. When the oxygen storage adapter upper shell 500 and the oxygen storage adapter lower shell 400 are assembled, the storage convex ridge 504 is inserted into the storage side groove 408 so that the oxygen inlet chamber 403 and the storage concave cavity 503 form a chamber for oxygen entry. To achieve a seal, a sealing ring is provided in the lower side groove 408. After the upper convex 504 is inserted and tightened, the elastic sealing ring is squeezed to achieve a seal in the oxygen inlet chamber 403.

[0068] Figure 13A partial perspective view of an oxygen storage tank assembly installed in a portable oxygen generator according to a preferred embodiment of the present invention is shown schematically. Figure 14 for Figure 13 The illustrated preferred embodiment shows a perspective view of the oxygen storage tank assembly mounted on a portable oxygen generator, from another angle. Figure 13 and Figure 14 As can be seen, in this preferred embodiment, the oxygen storage tank assembly includes an upper shell 100, a lower shell 200, an oxygen storage adapter cover 300, an oxygen storage adapter lower shell 400, an oxygen storage adapter upper shell 500, an oxygen outlet connector 600, an oxygen detection tube 700, a pressure equalization valve D10, a one-way valve (not shown), a pulse valve (not shown), a pressure relief valve D7, and a sensor.

[0069] The upper shell 100 and lower shell 200 are connected by bolts through fixing holes on the fixed edges to form an oxygen storage tank with an internal oxygen storage cavity. At the bottom of the oxygen storage tank, it is fixedly connected to the air compressor housing D8 through the lower shell's first fixing hole 205 and second fixing hole 206. A pressure relief valve D7 and a blower D6 for supplying gas to the air compressor are also fixed on the air compressor housing D8. The pressure relief valve D7 is connected to the connection hole in the oxygen outlet chamber 107 of the upper shell 100 via a pipeline. Furthermore, the bottom of the lower shell 200 of the oxygen storage tank is fitted into the protruding structure of the adjacent tank compartment partition D2 through a partition groove 207 to enhance the stability of the component connection and the overall integrity of the oxygen generator's internal structure. Outside the tank compartment partition D2 is the molecular sieve tank D1. The upper end cap of the molecular sieve tank D1 is connected to the oxygen inlet pipe connector 401 of the oxygen storage adapter lower shell 400 installed on the upper shell 100 via an oxygen inlet pipe D3.

[0070] At the top of the upper shell 100 of the oxygen storage tank, the bottom of the lower shell 400 is fixedly connected to the upper shell 100, and the top is fixedly connected to the upper shell 500, together forming an oxygen storage transfer device before oxygen enters the oxygen storage tank. A pressure equalization valve D10 is installed in the pressure equalization valve mounting groove 116 between the oxygen storage transfer device and the tank partition. The pressure equalization valve D10 is fixedly connected to the lower shell 400 through the pressure equalization valve fixing hole 409 at the bottom of the lower shell 400, and communicates with the T-shaped oxygen inlet chamber 403 through the pressure equalization valve hole 407. Two one-way valves are respectively installed at the ends of the longitudinal chambers of the two T-shaped oxygen inlet chambers 403, thereby controlling the unidirectional entry of oxygen into the oxygen storage tank.

[0071] A pulse valve is installed on the pulse valve mounting section of the upper shell 100 to control the cycle of molecular sieve adsorption and desorption, ensuring periodic switching of the gas path. Sensors and oxygen detection tubes 700, integrated with the circuit board, are installed on both sides of the pulse valve. The sensor is fixedly connected to the sensor connection hole 111, and its circuit board is positioned by the sensor positioning post 114 and fixed by the sensor connection post 115. Similarly, the oxygen inlet of the oxygen detection tube 700 is connected to the oxygen detection outlet hole 102 on the outer shell 100, and the oxygen outlet is connected to the oxygen outlet chamber 107 through the oxygen inlet hole 308 on the oxygen outlet adapter cover 300, thus enabling oxygen detection during the process of transporting oxygen from the oxygen storage tank to the oxygen outlet chamber 107. One end of the circuit board of the oxygen detection tube 700 is fixedly connected to the adapter cover connection post 304 on the oxygen outlet adapter cover, and the other end is fixedly connected to the oxygen detection connection post 113 on the upper shell 100. Above the oxygen detector tube 700 are, in order, the display control board D5 and the display screen D4.

[0072] Two connection holes, namely a first connection hole 108 and a second connection hole 109, are provided in the oxygen outlet chamber 107 of the outer casing 100. The first connection hole 108 is connected to a sensor on the main control board D9 via a pipeline, while the second connection hole 109 is connected to the pressure relief valve D7 via a pipeline. For the oxygen concentration, pressure, temperature, and other indicators that need to be detected in the prepared oxygen, these can be measured by selecting an oxygen detection tube, a sensor, or a sensor on the main control board, depending on specific requirements; details will not be elaborated here.

[0073] Figure 15 This is a partial perspective view of an oxygen storage tank assembly installed in a portable oxygen generator (excluding the upper shell) according to a preferred embodiment of the present invention. Figure 16 for Figure 15 A color rendering. From Figure 15 and Figure 16 As can be seen, in this preferred embodiment, the equalizing valve D10 is arranged adjacent to two one-way valves 800, with its bottom connected to the upper shell 100 (not shown), and its upper part connected via the oxygen storage adapter lower shell 400. The bottom tube of the one-way valve 800 is inserted into the air inlet 101 of the upper shell 100, and the upper tube is connected to the oxygen inlet chamber 403 via the one-way valve hole 406 of the oxygen storage adapter lower shell 400, thereby realizing one-way control of the flow of oxygen into the oxygen storage tank.

[0074] A bacterial filter 900 is installed within the oxygen-storing cavity formed by the upper shell 100 and the lower shell 200. A Z-shaped air outlet pipe is connected to the air outlet end of the disc-shaped main body of the bacterial filter 900. Figure 16(Blue pipes and connectors) ensure that the oxygen in the oxygen storage tank is filtered before leaving the tank. The outlet end of the Z-shaped outlet pipe is connected to the inlet of the pulse valve D11 through the upper shell 100. After passing through the pulse valve D11, the oxygen is connected to the U-shaped inner connecting pipe D12 located inside the oxygen storage tank through the outlet of the pulse valve D11. The inner connecting pipe D12 is connected to the oxygen detection port 102 of the upper shell 100 and enters the oxygen detection tube 700. In addition, to enhance the sealing between the upper shell 100 and the lower shell 200, a sealing ring D13 is provided in the side groove 203 of the lower shell ( Figure 16 (As shown in red), a ring of protrusions corresponding to the upper shell 100 and the lower shell side groove 203 is inserted into the lower shell side groove 203 and fixed with bolts to compress the sealing ring D13, thereby achieving a seal between the upper shell 100 and the lower shell 200.

[0075] In the above embodiments, the U-shaped inner connecting pipe and the relatively large bacterial filter 900 (D12) are built into the oxygen storage tank, avoiding the problem of having to increase the size of the portable oxygen generator to accommodate the bacterial filter 900, and effectively improving the integration of the portable oxygen generator. Simultaneously, through the organic combination of the upper shell 100 with components such as the one-way valve 800, bacterial filter 900, pulse valve D11, inner connecting pipe D12, and oxygen detection tube 700, a unique two-in-two-out flow path is achieved: oxygen enters the storage tank through the one-way valve 800, flows out after filtration, then flows into the inner connecting pipe through the pulse valve, and finally flows out again through the inner connecting pipe into the oxygen detection tube. This unique oxygen flow path efficiently utilizes the internal and external space of the oxygen storage tank, cleverly and effectively integrating multiple components into a single, highly efficient space.

[0076] Existing portable oxygen concentrators generally use oxygen storage tanks with regular shapes such as near-cylinders, and the design trend tends to reduce the size of the oxygen storage tank. This invention creatively enlarges the volume of the oxygen storage tank and integrates some components inside, forming a special gas path around the irregularly shaped shell of the tank. By storing oxygen in the irregular space inside the oxygen storage tank, it not only ensures the oxygen storage function but also achieves a tight connection between the oxygen storage tank and all components, while efficiently utilizing the internal space of the oxygen concentrator.

[0077] The working principle and process of the above-mentioned oxygen storage tank and its components are as follows:

[0078] After oxygen is separated in the molecular sieve tank, it enters the T-shaped oxygen inlet chamber 403 of the oxygen storage transfer shell 400 through the oxygen inlet pipe D3. During the corresponding stage of the oxygen generation cycle, one of the one-way valves 800 opens, allowing oxygen to enter the oxygen storage tank. When outputting oxygen, it first passes through the bacterial filter 900 located inside the oxygen storage tank and enters its Z-shaped outlet pipe. After passing through this Z-shaped outlet pipe, the oxygen enters the pulse valve D11, and then re-enters the oxygen storage tank. This time, it enters the U-shaped inner connecting pipe D12, also located inside the oxygen storage cavity. The outlet of the inner connecting pipe D12 is connected to the oxygen detection outlet 102 of the upper shell 100, and enters the oxygen detection pipe 700 through the oxygen detection outlet 102. After detection, the oxygen enters the oxygen outlet chamber 107 at the bottom of the oxygen outlet transfer cover 300 through the oxygen outlet of the oxygen detection pipe 700. The oxygen in the oxygen outlet chamber 107 can be connected to a sensor on the main control board D9 via the first connection hole 108, or to the pressure relief valve D7 via the second connection hole 109. This allows for the detection of the output oxygen, such as its temperature, concentration, or other parameters; and also enables pressure relief via the pressure relief valve D7 when the pressure is too high. Finally, the oxygen flows out of the portable oxygen generator through the oxygen outlet connector 600.

[0079] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An integrated shaped oxygen storage tank for a portable oxygen generator, characterized by, The upper shell and the lower shell are detachably fixedly connected, and the upper shell and the lower shell enclose an internal cavity for storing oxygen; the top of the upper shell is provided with an air inlet end and an oxygen outlet end, the air inlet end is provided with an air inlet hole, and the oxygen outlet end is provided with an oxygen outlet cavity; the oxygen outlet cavity is provided with an oxygen detection outlet hole and a pulse valve mounting seat between the air inlet end and the oxygen outlet end; the outer side of the air inlet hole is provided with an equal pressure valve mounting groove, and the outer side of the pulse valve mounting seat is provided with a sensor connecting hole; the bottom of the lower shell is provided with a plurality of fixing holes for connecting with a bottom part.

2. The integrated shaped oxygen storage tank for portable oxygen generator of claim 1, wherein, A plurality of storage connecting columns are arranged outside the air inlet hole; an oxygen detection connecting column is arranged between the storage connecting column and the oxygen detection outlet hole; a sensor connecting column is arranged outside the sensor connecting hole.

3. The integrated shaped oxygen storage tank for portable oxygen generator of claim 1, wherein, A connecting hole in communication with the outside of the oxygen storage tank is arranged in the oxygen outlet cavity; a plurality of oxygen outlet adapter fixing holes are uniformly distributed outside the oxygen outlet cavity.

4. The integrated shaped oxygen storage tank for portable oxygen generator of claim 1, wherein, A sensor positioning column is arranged outside the sensor connecting hole, an oxygen outlet adapter positioning column is arranged outside the oxygen outlet cavity, and a lower shell positioning column and a partition groove are arranged on the bottom of the lower shell.

5. An assembly comprising the integrated shaped OSC of any of claims 1-4, wherein, The oxygen outlet adapter structure, the oxygen storage adapter structure, the oxygen detection pipe, the pulse valve, the sensor and the one-way valve are integrated in the upper shell, and the bacterial filter and the inner connecting pipe are integrated in the inside of the oxygen storage tank; wherein the oxygen storage adapter structure is in communication with the oxygen storage cavity in the oxygen storage tank through the one-way valve, the upper shell and the inner connecting pipe in sequence, the bacterial filter in the oxygen storage cavity is in communication with the pulse valve through the air outlet pipeline and the upper shell, the pulse valve is in communication with the inner connecting pipe through the upper shell, the outlet of the inner connecting pipe is in communication with the oxygen detection pipe through the upper shell, the oxygen detection pipe is in communication with the oxygen outlet adapter structure, and finally oxygen is supplied to the outside through the oxygen outlet adapter structure.

6. The assembly of claim 5, wherein, The equal pressure valve and the sensor are further included; the oxygen storage adapter structure comprises an oxygen storage adapter upper shell and an oxygen storage adapter lower shell; The oxygen outlet adapter structure comprises an oxygen outlet adapter cover and an oxygen outlet adapter joint; The oxygen outlet adapter cover is fixed to the upper part of the oxygen outlet cavity of the upper shell through the oxygen outlet adapter fixing hole, and the oxygen outlet adapter joint is installed on the oxygen outlet adapter cover; The oxygen storage adapter lower shell is fixedly connected with the upper shell through the storage connecting column, the oxygen storage adapter upper shell is fixedly connected above the oxygen storage adapter lower shell, and the inside of the oxygen storage adapter upper shell and the oxygen storage adapter lower shell encloses two independent oxygen inlet cavities; a one-way valve hole corresponding to the position of the air inlet hole is arranged in the oxygen inlet cavity; two one-way valves are arranged between the two one-way valve holes and the two air inlet holes respectively; the oxygen inlet cavity is further provided with an equal pressure valve hole in communication with the equal pressure valve arranged in the equal pressure valve mounting groove; two oxygen inlet pipe joints in communication with the two oxygen inlet cavities are arranged on the oxygen storage adapter lower shell, the oxygen separated by the molecular sieve tank enters the oxygen inlet cavity through the oxygen inlet pipe joint, and then enters the oxygen storage tank through the one-way valve and the air inlet hole in sequence; the air inlet of the oxygen detection pipe is in communication with the oxygen detection outlet hole, and the air outlet is in communication with the oxygen outlet cavity through the oxygen outlet adapter cover, so as to transport the oxygen in the oxygen storage tank to the oxygen outlet cavity; the sensor is connected with the upper shell of the oxygen storage tank through the sensor connecting hole.

7. The assembly of claim 6, wherein, The bottom of the oxygen outlet adapter cover is provided with an adapter cover recess cavity matched with the oxygen outlet cavity; The adapter cover oxygen outlet hole and the adapter cover oxygen inlet hole are arranged in the adapter cover recess cavity, and the adapter cover oxygen inlet hole is in communication with the oxygen outlet hole of the oxygen detection pipe; The oxygen outlet stand pipe in communication with the adapter cover oxygen outlet hole is arranged on the upper part of the oxygen outlet adapter cover, and the oxygen outlet joint is connected with the oxygen outlet stand pipe.

8. The assembly of claim 6, wherein, The oxygen storage adapter lower shell is provided with two independent T-shaped oxygen inlet cavities, a one-way valve hole is arranged at the longitudinal cavity end of the T-shaped oxygen inlet cavity, an oxygen inlet pipe joint is communicated with one end of the horizontal cavity, and an equalizing valve hole is communicated with the other end of the horizontal cavity; a circle of oxygen storage lower edge grooves is arranged outside the two oxygen inlet cavities; and an oxygen storage lower positioning column is arranged on both sides of the oxygen storage lower edge groove.

9. The assembly of claim 8, wherein, The bottom of the oxygen storage adapter upper shell is provided with a circle of oxygen storage upper convex ribs, two oxygen storage upper positioning holes are arranged outside the oxygen storage upper convex ribs; when the oxygen storage adapter upper shell is connected with the oxygen storage adapter lower shell, the oxygen storage upper convex ribs are inserted into the oxygen storage lower edge groove, and the oxygen storage lower positioning column is inserted into the oxygen storage upper positioning hole.

10. The assembly of claim 6, wherein, The pressure relief valve is further included; a first connecting hole and a second connecting hole are arranged in the oxygen outlet cavity of the oxygen storage tank upper shell; the first connecting hole is connected with a sensor on the main control panel of the oxygen generator through a pipeline; and the second connecting hole is connected with the pressure relief valve through a pipeline.

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