Oxygen outlet path system of portable oxygen generator

Abstract

The invention discloses a portable oxygen generator oxygen outlet path system, which comprises an oxygen tank, a pulse pressure sensor, an oxygen outlet nozzle, a two-position three-way valve, an oxygen concentration sensor and a controller, the oxygen tank is provided with an oxygen outlet, the first port of the two-position three-way valve is communicated with the oxygen outlet, the second port of the two-position three-way valve is connected with the pulse pressure sensor, and the oxygen concentration sensor is connected with the controller. A third port of the two-position three-way valve is communicated with the oxygen outlet nozzle, the oxygen concentration sensor is arranged between the third port of the two-position three-way valve and the oxygen outlet nozzle, the oxygen concentration sensor is electrically connected with the controller, and the controller is electrically connected with the two-position three-way valve. According to the oxygen outlet path system, an oxygen outlet switch on the oxygen generator is omitted, oxygen is automatically discharged when inhaled, oxygen is discharged only when inhaled, and oxygen is not discharged when exhaled, and the problem that after the oxygen outlet switch is turned on, a user does not inhale oxygen in time, and consequently oxygen is wasted can be solved.

Description

Technical Field

[0001] The present invention relates to the field of oxygen generators, and particularly to an oxygen outlet pipeline system of a portable oxygen generator. Background Art

[0002] A portable oxygen generator is a small device designed for users in need of oxygen therapy. With its portability, ease of use, and stability, it provides great convenience to users, especially suitable for users who need long-term oxygen therapy or outdoor activities, and can significantly improve the quality of life.

[0003] Existing portable oxygen generators on the market have the following disadvantages:

[0004] 1) After the oxygen outlet switch on the oxygen generator is turned on, oxygen starts to flow out of the oxygen outlet nozzle. If the user does not inhale oxygen in time, the oxygen outlet nozzle will keep releasing oxygen, resulting in waste of oxygen.

[0005] 2) There are many pipelines connecting the oxygen tank to the oxygen outlet nozzle, which increases potential hazards, as well as material costs, processing costs, and assembly costs. Moreover, most of the pipeline materials are silicone, with poor sound insulation effect. In addition, the numerous pipelines occupy a large amount of space inside the portable oxygen generator, posing an obstacle to the further miniaturization of the portable oxygen generator. Summary of the Invention

[0006] The purpose of the present invention is to overcome the above deficiencies of the prior art and provide an oxygen outlet pipeline system of a portable oxygen generator.

[0007] According to one aspect of the present invention, there is provided an oxygen outlet pipeline system of a portable oxygen generator, comprising:

[0008] An oxygen tank, provided with an oxygen outlet on the oxygen tank;

[0009] A pulse pressure sensor;

[0010] An oxygen outlet nozzle;

[0011] A two-position three-way valve, the first port of the two-position three-way valve is communicated with the oxygen outlet, the second port of the two-position three-way valve is connected to the pulse pressure sensor, and the third port of the two-position three-way valve is communicated with the oxygen outlet nozzle;

[0012] An oxygen concentration sensor, arranged between the third port of the two-position three-way valve and the oxygen outlet nozzle; and

[0013] A controller, the oxygen concentration sensor is electrically connected to the controller, and the controller is electrically connected to the two-position three-way valve.

[0014] The oxygen outlet pipeline system for a portable oxygen generator according to the present invention. When the user is not inhaling oxygen, the controller controls the second port and the third port of the two-way three-way valve to be connected, that is, the oxygen outlet nozzle and the pulse pressure sensor are on a connected gas path. When the user needs to inhale oxygen, an oxygen inhalation tube or an oxygen inhalation mask is connected to the oxygen outlet nozzle. When the user starts to inhale, a negative pressure will be generated in the gas path between the oxygen outlet nozzle and the pulse pressure sensor. The pulse pressure sensor will detect a slight pressure change in the gas path, thereby capturing the user's inhalation signal. The pulse pressure sensor sends a switch signal to the controller, and the controller controls the first port and the third port of the two-way three-way valve to be connected for a time t. At this time, the user can inhale the oxygen in the oxygen cylinder through the oxygen outlet nozzle, the third port of the two-way three-way valve, the first port of the two-way three-way valve, and the oxygen outlet on the oxygen cylinder. After the user inhales oxygen once, the connection time of the first port and the third port of the two-way three-way valve ends, and the controller controls the two-way three-way valve to reset, that is, the second port and the third port of the two-way three-way valve are reconnected, and the gas path from the oxygen outlet nozzle to the pulse pressure sensor is reconnected to prepare for the user's next oxygen inhalation. When the user inhales oxygen for the second time, the controller controls the first port and the third port of the two-way three-way valve to be connected again for a time t. After the user inhales oxygen for the second time, the connection time of the first port and the third port of the two-way three-way valve ends, and the controller controls the two-way three-way valve to reset, that is, the second port and the third port of the two-way three-way valve are reconnected, and the gas path from the oxygen outlet nozzle to the pulse pressure sensor is reconnected to prepare for the user's third oxygen inhalation. It works in the mode of "the second port and the third port of the two-way three-way valve are connected → the first oxygen inhalation → the first port and the third port of the two-way three-way valve are connected and the connection time is t → the first oxygen inhalation is completed → the second port and the third port of the two-way three-way valve are connected → the second oxygen inhalation → the first port and the third port of the two-way three-way valve are connected and the connection time is t → the second oxygen inhalation is completed → the second port and the third port of the two-way three-way valve are connected...", that is, when the user inhales, the first port and the third port of the two-way three-way valve are connected for the user to inhale oxygen, and when the user exhales, the second port and the third port of the two-way three-way valve are connected to stop oxygen output. In addition, the oxygen concentration sensor can detect the concentration of the oxygen flowing out of the oxygen outlet nozzle in real time. When the oxygen concentration is lower than the set value (indicating that there is an abnormality in the oxygen generation of the oxygen generator), the controller can control the oxygen generator to alarm to remind the user to perform maintenance or replace the new oxygen generator. In the oxygen outlet pipeline system of the present invention, the pulse pressure sensor can capture the user's inhalation signal when the user inhales, thereby automatically connecting the gas path between the oxygen outlet of the oxygen cylinder and the oxygen outlet nozzle, and automatically closing the gas path between the oxygen outlet of the oxygen cylinder and the oxygen outlet nozzle when the user exhales (that is, the second port and the third port of the two-way three-way valve are connected). It is very convenient, cancels the oxygen outlet switch on the oxygen generator, realizes automatic oxygen output when inhaling, and oxygen output only when inhaling, and no oxygen output when exhaling, which can avoid the problem of oxygen waste caused by the user not inhaling oxygen in time after the oxygen outlet switch is opened.

[0015] Furthermore, it further includes a connecting member, on which there are a first air inlet, a second air inlet, a first air outlet and a second air outlet. The first air inlet is communicated with the first air outlet, and the second air inlet is communicated with the second air outlet.

[0016] The second port of the two-position three-way valve is communicated with the first air inlet, and the first air outlet is communicated with the pulse pressure sensor.

[0017] The third port of the two-position three-way valve is communicated with the second air inlet, and the second air outlet is communicated with the oxygen outlet nozzle. The oxygen concentration sensor is arranged between the second air outlet and the oxygen outlet nozzle.

[0018] The connecting member is arranged on the oxygen tank.

[0019] Therefore, the two-position three-way valve can be connected to the pulse pressure sensor and the oxygen outlet nozzle through the connecting member, thereby reducing the pipeline connection between the two-position three-way valve and the pulse pressure sensor and the oxygen outlet nozzle, reducing the material cost and potential defects, reducing the assembly, simplifying the assembly, and moreover, reducing the materials can also effectively reduce the overall machine noise. At the same time, it can effectively reduce the occupied space inside the portable oxygen generator, providing the possibility for the further miniaturization of the portable oxygen generator.

[0020] Furthermore, the connecting member is provided with a concave cavity, the inner wall of the concave cavity is provided with internal threads, the outer bottom of the concave cavity is provided with a connecting pipe communicated with the concave cavity, the outer wall of the oxygen outlet nozzle is provided with external threads adapted to the internal threads, the oxygen outlet nozzle is screwed into the concave cavity, the second air outlet is communicated with the connecting pipe, and the oxygen concentration sensor is arranged between the second air outlet and the connecting pipe.

[0021] Therefore, installing the oxygen outlet nozzle on the connecting member can optimize the internal space layout of the oxygen generator and facilitate the connection between the oxygen outlet nozzle and the second air outlet.

[0022] Furthermore, it further includes a control board, and the pulse pressure sensor, the oxygen concentration sensor and the controller are all integrated on the control board.

[0023] The connecting member is arranged on the top of the oxygen tank, the control board is arranged on the side of the oxygen tank, and the control board is located below the oxygen outlet nozzle.

[0024] Therefore, integrating the pulse pressure sensor, the oxygen concentration sensor and the controller on the control board facilitates the installation or disassembly of the pulse pressure sensor, the oxygen concentration sensor and the controller as a whole. The installation positions of the connecting member and the control board can optimize the internal space layout of the oxygen generator and facilitate the connection between the oxygen outlet nozzle, the second air outlet on the connecting member and the oxygen concentration sensor.

[0025] Further, the connecting member is provided with a first air passage and a second air passage. One end of the first air passage is communicated with the first air inlet, and the other end of the first air passage is communicated with the first air outlet. One end of the second air passage is communicated with the second air inlet, and the other end of the second air passage is communicated with the second air outlet.

[0026] Therefore, the first air passage on the connecting member can realize the connection between the second port of the two-way three-way valve and the pulse pressure sensor, and the second air passage on the connecting member can realize the connection between the third port of the two-way three-way valve and the oxygen outlet nozzle.

[0027] Further, the connecting member includes an upper shell and a base. The upper shell and the base are snap-connected together and jointly enclose the first air passage and the second air passage. The first air inlet, the second air inlet, the first air outlet, and the second air outlet are all arranged on the base, and the concave cavity is arranged on the upper shell.

[0028] Therefore, the connecting member is formed by assembling the upper shell and the base, which is convenient for the processing and forming of the first air passage and the second air passage.

[0029] Further, a first groove and a second groove are provided on the end surface of the upper shell facing the base. A first protrusion adapted to the first groove is provided on the end surface of the base facing the upper shell. A second protrusion adapted to the second groove is provided on the end surface of the base facing the upper shell. The first air inlet and the first air outlet are both communicated with the space enclosed by the first protrusion. The second air inlet and the second air outlet are both communicated with the space enclosed by the second protrusion.

[0030] The upper shell and the base are snap-connected together, and the first protrusion is inserted into the first groove, and the second protrusion is inserted into the second groove.

[0031] Therefore, the upper shell and the base can be stably assembled together through the insertion fit of the first protrusion and the first groove and the insertion fit of the second protrusion and the second groove, and the sealing performance of the first air passage and the second air passage after the two are assembled can also be ensured.

[0032] Further, an avoidance position is provided on the base, and the connecting pipe is accommodated in the avoidance position.

[0033] Therefore, the connecting pipe on the outer bottom of the concave cavity is accommodated in the avoidance position to facilitate the connection between the connecting pipe and the oxygen concentration sensor, optimize the internal space layout of the oxygen generator, and make the structure of the oxygen outlet pipeline system more compact.

[0034] Further, a positioning column is provided on the top of the oxygen tank, a positioning cylinder is provided on the connecting member, and a plugging through hole is provided in the positioning cylinder. The positioning column is inserted into the plugging through hole.

[0035] Therefore, when assembling the oxygen tank and the connector, slipping the positioning cylinder on the connector over the positioning post on the oxygen tank, i.e., inserting the positioning post into the insertion through hole on the positioning cylinder, can ensure that the first air inlet, the second air inlet, the first air outlet, and the second air outlet on the connector correspond to the components they are respectively connected to, improving the assembly efficiency.

[0036] Furthermore, a first accommodation groove is provided on the side of the oxygen tank, and the pulse pressure sensor, the oxygen concentration sensor, and the connecting pipe are all located in the first accommodation groove.

[0037] Therefore, the first accommodation groove can reduce the occupied space of the pulse pressure sensor, the oxygen concentration sensor, and the oxygen outlet nozzle inside the oxygen generator, making the structure more compact. Description of the Drawings

[0038] Figure 1 is a schematic structural diagram of the oxygen outlet pipeline system of a portable oxygen generator according to the present invention;

[0039] Figure 2 is Figure 1 a schematic structural diagram of another perspective of the oxygen outlet pipeline system shown;

[0040] Figure 3 is Figure 1 a schematic structural diagram of yet another perspective of the oxygen outlet pipeline system shown;

[0041] Figure 4 is Figure 1 a schematic exploded structural diagram of the oxygen outlet pipeline system shown with the pipeline hidden;

[0042] Figure 5 is Figure 4 a schematic structural diagram of another perspective of the oxygen outlet pipeline system shown. Detailed Embodiments

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0044] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more. It should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements.

[0045] Refer to Figures 1 to 5 , an oxygen outlet pipeline system of a portable oxygen generator, including an oxygen tank 1, a pulse pressure sensor 2, an oxygen outlet nozzle 3, a two-position three-way valve 4, an oxygen concentration sensor 5, a controller, a connector 6, and a control board 7.

[0046] Refer to Figure 1 , an oxygen outlet 11 and an oxygen inlet 15 are provided on the oxygen tank 1. The oxygen separated by the separation tower inside the portable oxygen generator enters the oxygen tank 1 through the oxygen inlet 15 for storage, and the oxygen in the oxygen tank 1 can flow out through the oxygen outlet 11 for the user to breathe and inhale oxygen.

[0047] Refer to Figure 1 and Figure 4 , a concave second accommodation groove 13 is formed on the side of the oxygen tank 1, and the two-position three-way valve 4 is fixed in the second accommodation groove 13. Specifically, a clamping frame 131 is formed in the second accommodation groove 13, and the two-position three-way valve 4 is clamped and fixed on the clamping frame 131. The second accommodation groove 13 can reduce the occupied space of the two-position three-way valve 4 inside the oxygen generator and make the structure more compact.

[0048] Refer to Figure 1 and Figure 4 , the first port 41 of the two-position three-way valve 4 is inserted into the oxygen outlet 11 to realize the communication between the first port 41 of the two-position three-way valve 4 and the oxygen outlet 11. In order to improve the sealing performance, a sealing ring can be installed between the first port 41 of the two-position three-way valve 4 and the oxygen outlet 11.

[0049] Refer to Figures 1 to 3, the connecting member 6 is installed on the top of the oxygen tank 1. The connecting member 6 is formed with a first air inlet 61, a second air inlet 62, a first air outlet 63 and a second air outlet 64. The first air inlet 61 is communicated with the first air outlet 63, and the second air inlet 62 is communicated with the second air outlet 64. A first air passage and a second air passage are formed in the connecting member 6. One end of the first air passage is communicated with the first air inlet 61, and the other end of the first air passage is communicated with the first air outlet 63. One end of the second air passage is communicated with the second air inlet 62, and the other end of the second air passage is communicated with the second air outlet 64. Specifically, refer to Figure 4 and Figure 5 , the connecting member 6 includes an upper shell 601 and a base 602. The first air inlet 61, the second air inlet 62, the first air outlet 63 and the second air outlet 64 are all arranged on the base 602. A first groove 6011 and a second groove 6012 are formed on the end surface of the upper shell 601 facing the base 602. A first protrusion 6021 adapted to the first groove 6011 is formed on the end surface of the base 602 facing the upper shell 601. A second protrusion 6022 adapted to the second groove 6012 is formed on the end surface of the base 602 facing the upper shell 601. The first air inlet 61 and the first air outlet 63 are both communicated with the space enclosed by the first protrusion 6021. The second air inlet 62 and the second air outlet 64 are both communicated with the space enclosed by the second protrusion 6022. The upper shell 601 and the base 602 are snapped together, and the first protrusion 6021 is inserted into the first groove 6011, and the second protrusion 6022 is inserted into the second groove 6012. The space enclosed by the first protrusion 6021 and the first groove 6011 together enclose and form the first air passage. The space enclosed by the second protrusion 6022 and the second groove 6012 together enclose and form the second air passage. The upper shell 601 and the base 602 can be stably assembled together through the insertion fit of the first protrusion 6021 and the first groove 6011 and the insertion fit of the second protrusion 6022 and the second groove 6012, and it can also ensure the sealing performance of the first air passage and the second air passage after the two are assembled. The upper shell 601 and the base 602 can be hot-melted together by ultrasonic pressing. The connecting member 6 is formed by assembling the upper shell 601 and the base 602, which is convenient for the processing and forming of the first air passage and the second air passage.

[0050] A concave cavity 65 is formed on the connecting member 6. Specifically, refer to Figure 4 and Figure 5, a concave cavity 65 is formed on the upper shell 601 of the connecting member 6. An internal thread 651 is formed on the inner wall of the concave cavity 65. A connecting pipe 652 communicating with the concave cavity 65 is formed on the outer bottom of the concave cavity 65. An external thread 31 adapted to the internal thread 651 is formed on the outer wall of the oxygen outlet nozzle 3. The oxygen outlet nozzle 3 is screwed into the concave cavity 65. An avoidance position 6023 is formed on the base 602. The connecting pipe 652 on the outer bottom of the concave cavity 65 is accommodated in the avoidance position 6023 to facilitate the connection between the connecting pipe 652 and the oxygen concentration sensor 5, optimize the internal space layout of the oxygen generator, make the structure of the oxygen outlet path system more compact. A sealing ring can be installed between the outer wall of the oxygen outlet nozzle 3 and the inner wall of the concave cavity 65 to improve the sealing performance between the two and prevent oxygen leakage. Installing the oxygen outlet nozzle 3 on the connecting member 6 can optimize the internal space layout of the oxygen generator and facilitate the connection between the oxygen outlet nozzle 3 and the second air outlet 64.

[0051] Refer to Figures 1 to 5 , the second port 42 of the two-way three-way valve 4 is connected to the first air inlet 61 on the connecting member 6 through the first pipeline 10 to achieve their connection. The first air outlet 63 on the connecting member 6 is connected to the detection head on the pulse pressure sensor 2 through the second pipeline 20. The third port 43 of the two-way three-way valve 4 is connected to the second air inlet 62 on the connecting member 6 through the third pipeline 30 to achieve their connection. The second air outlet 64 on the connecting member 6 is connected to the inlet end 51 of the oxygen concentration sensor 5 through the fourth pipeline 40 to achieve their connection. The outlet end 52 of the oxygen concentration sensor 5 is connected to the connecting pipe 652 on the outer bottom of the concave cavity 65 through the fifth pipeline 50 to achieve the connection between the outlet end 52 of the oxygen concentration sensor 5 and the oxygen outlet nozzle 3. The oxygen concentration sensor 5 is installed between the second air outlet 64 and the connecting pipe 652, that is, the oxygen concentration sensor 5 is installed between the second air outlet 64 and the oxygen outlet nozzle 3. The two-way three-way valve 4 can be connected to the pulse pressure sensor 2 and the oxygen outlet nozzle 3 through the connecting member 6. The first air passage on the connecting member 6 can achieve the connection between the second port 42 of the two-way three-way valve 4 and the pulse pressure sensor 2. The second air passage on the connecting member 6 can achieve the connection between the third port 43 of the two-way three-way valve 4 and the oxygen outlet nozzle 3. Thus, the pipeline connection between the two-way three-way valve 4 and the pulse pressure sensor 2 and the oxygen outlet nozzle 3 can be effectively reduced, reducing the material cost and potential defects, reducing the assembly, simplifying the assembly. Moreover, while reducing the materials, the overall machine noise can also be effectively reduced. At the same time, the occupied space inside the portable oxygen generator can be effectively reduced, providing the possibility for the further miniaturization of the portable oxygen generator.

[0052] Refer to Figure 4 and Figure 5, in this embodiment, the two-position three-way valve 4 adopts a two-position three-way solenoid valve with the model number MAC-BV310A. The MAC-BV310A two-position three-way solenoid valve has a simple structure, fast response, low power consumption, and small volume. Its structure is simple and it is easy to install and maintain.

[0053] Refer to Figure 4 , a positioning post 12 is formed on the top of the oxygen tank 1. A positioning cylinder 66 is formed on the upper shell 601 of the connector 6. A plugging through hole 661 is formed in the positioning cylinder 66, and the plugging through hole 661 penetrates through the upper shell 601. A through hole 6024 is formed on the base 602 of the connector 6. The positioning post 12 is plugged in the plugging through hole 661. When the upper shell 601 and the base 602 are buckled together, the through hole 6024 on the base 602 is aligned with the bottom of the plugging through hole 661. When assembling the oxygen tank 1 and the connector 6, the positioning cylinder 66 on the connector 6 is sleeved on the positioning post 12 on the oxygen tank 1, that is, the positioning post 12 passes through the through hole 6024 and is plugged in the plugging through hole 661 on the positioning cylinder 66. In this way, after installing the connector 6, it can be ensured that the first air inlet 61, the second air inlet 62, the first air outlet 63, and the second air outlet 64 on the connector 6 correspond to the respective connected components, improving the assembly efficiency.

[0054] Refer to Figure 4 and Figure 5, the pulse pressure sensor 2, the oxygen concentration sensor 5, and a controller (not shown) are all integrated on the control board 7. Integrating the pulse pressure sensor 2, the oxygen concentration sensor 5, and the controller on the control board 7 facilitates the installation or removal of the pulse pressure sensor 2, the oxygen concentration sensor 5, and the controller as a whole. The oxygen concentration sensor 5 is connected to the controller through a wire harness, and the controller is connected to the two-way three-way valve 4 through a wire harness. The controller can be a microcontroller or a single-chip microcomputer, and the controller can be connected to an alarm device (such as a buzzer or an alarm light) on the oxygen generator. The controller can control the alarm device on the oxygen generator to give an alarm. The oxygen concentration sensor 5 can detect the concentration of the oxygen flowing out of the oxygen outlet 3 in real time and send the detected signal to the controller for processing. When the oxygen concentration is lower than the set value, it indicates that there is an abnormality in the oxygen generation of the oxygen generator. The controller can control the oxygen generator to give an alarm to remind the user to perform maintenance or replace the new oxygen generator. When the user is not inhaling oxygen, the controller controls the second port 42 and the third port 43 of the two-way three-way valve 4 to be connected, that is, the oxygen outlet 3 and the pulse pressure sensor 2 are on a connected gas path. When the user needs to inhale oxygen, an oxygen inhalation tube or an oxygen inhalation mask is connected to the oxygen outlet 3. When the user starts to inhale, a negative pressure will be generated in the gas path between the oxygen outlet 3 and the pulse pressure sensor 2. The pulse pressure sensor will detect a tiny pressure change in the gas path, thereby capturing the user's inhalation signal. The pulse pressure sensor 2 sends a switch signal to the controller, and the controller controls the first port 41 and the third port 43 of the two-way three-way valve 4 to be connected for a time t. The size of t can be set according to the normal breathing frequency of a person. For example, if the normal inhalation time of a person is 1 to 1.5 s, t can be set to 1.After 5s, when the first port 41 and the third port 43 of the two-position three-way valve 4 are connected for t seconds, the controller controls the two-position three-way valve 4 to reset, that is, the second port 42 and the third port 43 of the two-position three-way valve 4 are connected. The working mode of the two-position three-way valve 4 can be set in advance by the controller. When the controller controls the first port 41 and the third port 43 of the two-position three-way valve 4 to be connected, the user can inhale the oxygen in the oxygen tank 1 through the oxygen outlet nozzle 3, the oxygen concentration sensor 5, the second air outlet 64 on the connector 6, the second air passage on the connector 6, the second air inlet 62 on the connector 6, the third port 43 of the two-position three-way valve 4, the first port 41 of the two-position three-way valve 4, and the oxygen outlet 11 on the oxygen tank 1. After the user inhales oxygen once, the connection time between the first port 41 and the third port 43 of the two-position three-way valve 4 ends, and the controller controls the two-position three-way valve 4 to reset, that is, the second port 42 and the third port 43 of the two-position three-way valve 4 are reconnected, and the oxygen outlet nozzle 3 to the pulse pressure sensor 2 are on a connected air path again, preparing for the user's next oxygen inhalation. When the user inhales oxygen for the second time, the controller controls the first port 41 and the third port 43 of the two-position three-way valve 4 to be connected again for t seconds. After the user inhales oxygen for the second time, the connection time between the first port 41 and the third port 43 of the two-position three-way valve 4 ends, and the controller controls the two-position three-way valve 4 to reset, that is, the second port 42 and the third port 43 of the two-position three-way valve 4 are reconnected, and the oxygen outlet nozzle 3 to the pulse pressure sensor 2 are on a connected air path again, preparing for the user's third oxygen inhalation. Thus, it works in the mode of "the second port 42 and the third port 43 of the two-position three-way valve 4 are connected → the first oxygen inhalation → the first port 41 and the third port 43 of the two-position three-way valve 4 are connected for t seconds → the first oxygen inhalation is completed → the second port 42 and the third port 43 of the two-position three-way valve 4 are connected → the second oxygen inhalation → the first port 41 and the third port 43 of the two-position three-way valve 4 are connected for t seconds → the second oxygen inhalation is completed → the second port 42 and the third port 43 of the two-position three-way valve 4 are connected...", that is, when the user inhales, the first port 41 and the third port 43 of the two-position three-way valve 4 are connected for the user to inhale oxygen, and when the user exhales, the second port 42 and the third port 43 of the two-position three-way valve 4 are connected to stop oxygen supply.

[0055] Refer to Figure 1 and Figure 4, a concave first accommodating groove 14 is formed on the side of the oxygen tank 1, and the control board 7 is installed on the side of the oxygen tank 1 where the first accommodating groove 14 is provided. The pulse pressure sensor 2, the oxygen concentration sensor 5, and the controller on the control board 7 are all located in the first accommodating groove 14, and the connecting pipe 652 is also located in the first accommodating groove 14. The control board 7 is located below the oxygen outlet nozzle 3. The first accommodating groove 14 can reduce the occupied space of the pulse pressure sensor 2, the oxygen concentration sensor 5, and the oxygen outlet nozzle 3 inside the oxygen generator, making the structure more compact and facilitating the connection between the second air outlet 64 on the connecting piece 6, the connecting pipe 652, and the oxygen concentration sensor 5.

[0056] Refer to Figures 1 to 5In the oxygen outlet circuit system for the portable oxygen concentrator of the present invention, when the user does not breathe oxygen, the controller controls the second port 42 and the third port 43 of the two-position three-way valve 4 to be connected, that is, the oxygen outlet nozzle 3 and the pulse pressure sensor 2 are in a connected air circuit. When the user needs to breathe oxygen, the oxygen inhalation tube or the oxygen inhalation mask is connected to the oxygen outlet nozzle 3. When the user starts to inhale, negative pressure will be generated in the air circuit between the oxygen outlet nozzle 3 and the pulse pressure sensor 2. The pulse pressure sensor 2 will detect a small pressure change in the air circuit, thereby capturing the user's inhalation signal. The pulse pressure sensor 2 sends a switch signal to the controller, and the controller controls the first port 41 and the third port 43 of the two-position three-way valve 4 to be connected and the connection time is t. At this time, the user can breathe in oxygen through the oxygen outlet nozzle 3. The oxygen in the oxygen tank 1 is sucked into the nozzle 3, the oxygen concentration sensor 5, the second air outlet 64 on the connecting piece 6, the second airway on the connecting piece 6, the second air inlet 62 on the connecting piece 6, the third port 43 of the two-position three-way valve 4, the first port 41 of the two-position three-way valve 4, and the oxygen outlet 11 on the oxygen tank 1. After the user inhales oxygen once, the connection time of the first port 41 and the third port 43 of the two-position three-way valve 4 ends, and the controller controls the two-position three-way valve 4 to reset, that is, the second port 42 and the third port 43 of the two-position three-way valve 4 are reconnected, and the oxygen outlet nozzle 3 to the pulse pressure sensor 2 are in a connected air path again, so as to prepare for the user's next oxygen inhalation. When the user inhales oxygen for the second time, the controller re-controls the first port 41 of the two-position three-way valve 4 and the third port 43 of the two-position three-way valve 4. The first port 41 and the third port 43 are connected and the connection time is t. After the user inhales oxygen for the second time, the connection time of the first port 41 and the third port 43 of the two-position three-way valve 4 ends, and the controller controls the two-position three-way valve 4 to reset, that is, the second port 42 and the third port 43 of the two-position three-way valve 4 are reconnected, and the oxygen outlet nozzle 3 to the pulse pressure sensor 2 are in a connected gas path again, so as to prepare for the user's third oxygen inhalation, thereby "the second port 42 and the third port 43 of the two-position three-way valve 4 are connected → first oxygen inhalation → the first port 41 and the third port 43 of the two-position three-way valve 4 are connected and the connection time is t → first oxygen inhalation is completed → the second port 42 and the third port 43 of the two-position three-way valve 4 are connected → second oxygen inhalation → two-position three-way valve The first port 41 and the third port 43 of the two-position three-way valve 4 are connected and the connection time is t→the second oxygen inhalation is completed→the second port 42 and the third port 43 of the two-position three-way valve 4 are connected..." mode, that is, when the user inhales, the first port 41 and the third port 43 of the two-position three-way valve 4 are connected to provide the user with oxygen inhalation, and when the user exhales, the second port 42 and the third port 43 of the two-position three-way valve 4 are connected to stop oxygen output. In addition, the oxygen concentration sensor 5 can detect the concentration of oxygen flowing out of the oxygen outlet nozzle 3 in real time. When the oxygen concentration is lower than the set value, the controller can control the oxygen generator to alarm to remind the user to repair or replace a new oxygen generator. At the same time, the two-position three-way valve 4 is connected to the pulse pressure sensor 2 and the oxygen outlet nozzle 3 through the connector 6.Thus, the pipeline connections between the two-position three-way valve 4, the pulse pressure sensor 2, and the oxygen outlet nozzle 3 can be effectively reduced, reducing the material cost and potential defects, simplifying the assembly process, and making the assembly easier. Moreover, reducing the materials can also effectively reduce the overall machine noise. At the same time, the occupied space inside the portable oxygen generator can be effectively reduced, providing the possibility for further miniaturization of the portable oxygen generator. The first accommodation groove 14 can reduce the occupied space of the pulse pressure sensor 2, the oxygen concentration sensor 5, and the oxygen outlet nozzle 3 inside the oxygen generator, and the second accommodation groove 13 can reduce the occupied space of the two-position three-way valve 4 inside the oxygen generator, making the structure more compact and providing the possibility for further miniaturization of the portable oxygen generator. In the oxygen outlet pipeline system of the present invention, when the user inhales, the pulse pressure sensor 2 can capture the user's inhalation signal, thereby automatically connecting the gas path between the oxygen outlet 11 of the oxygen cylinder 1 and the oxygen outlet nozzle 3. When the user exhales, the gas path between the oxygen outlet 11 of the oxygen cylinder 1 and the oxygen outlet nozzle 3 is automatically closed (i.e., the second port 42 and the third port 43 of the two-position three-way valve 4 are connected), which is very convenient. The original oxygen outlet switch on the oxygen generator is cancelled, realizing automatic oxygen output upon inhalation, oxygen output only during inhalation, and no oxygen output during exhalation, which can avoid the problem of oxygen waste caused by the user not inhaling oxygen in time after the oxygen outlet switch is opened.

[0057] The above are only some embodiments of the present invention, aiming to illustrate the technical means of the present invention, not to limit the technical scope of the present invention. Obvious improvements made by those skilled in the art in combination with the existing common knowledge fall within the protection scope of the present invention.

Claims

1. An oxygen outlet circuit system for a portable oxygen concentrator, characterized in that: include: An oxygen tank, wherein the oxygen tank is provided with an oxygen outlet; Pulse pressure sensor; Oxygen outlet; A two-position three-way valve, wherein a first port of the two-position three-way valve is connected to the oxygen outlet, a second port of the two-position three-way valve is connected to the pulse pressure sensor, and a third port of the two-position three-way valve is connected to the oxygen outlet nozzle; an oxygen concentration sensor, the oxygen concentration sensor being disposed between the third port of the two-position three-way valve and the oxygen outlet nozzle; and The oxygen concentration sensor is electrically connected to the controller, and the controller is electrically connected to the two-position three-way valve.

2. The oxygen outlet system according to claim 1, characterized in that: The invention also includes a connecting piece, wherein the connecting piece is provided with a first air inlet, a second air inlet, a first air outlet, and a second air outlet, the first air inlet is connected to the first air outlet, the second air inlet is connected to the second air outlet, The second port of the two-position three-way valve is connected to the first air inlet, and the first air outlet is connected to the pulse pressure sensor. The third port of the two-position three-way valve is connected to the second air inlet, the second air outlet is connected to the oxygen outlet nozzle, and the oxygen concentration sensor is arranged between the second air outlet and the oxygen outlet nozzle. The connecting piece is arranged on the oxygen tank.

3. The oxygen outlet passage system according to claim 2, characterized in that: The connecting piece is provided with a concave cavity, the inner wall of the concave cavity is provided with an internal thread, the outer bottom of the concave cavity is provided with a connecting pipe connected with the concave cavity, the outer wall of the oxygen outlet nozzle is provided with an external thread adapted to the internal thread, the oxygen outlet nozzle is screwed into the concave cavity, the second air outlet is connected with the connecting pipe, and the oxygen concentration sensor is arranged between the second air outlet and the connecting pipe.

4. The oxygen outlet system according to claim 2, characterized in that: It also includes a control board, on which the pulse pressure sensor, oxygen concentration sensor and controller are integrated. The connecting piece is arranged on the top of the oxygen tank, the control panel is arranged on the side of the oxygen tank, and the control panel is located below the oxygen outlet nozzle.

5. The oxygen outlet passage system according to claim 3, characterized in that: The connecting member is provided with a first air duct and a second air duct, one end of the first air duct is connected to the first air inlet, the other end of the first air duct is connected to the first air outlet, one end of the second air duct is connected to the second air inlet, and the other end of the second air duct is connected to the second air outlet.

6. The oxygen outlet passage system according to claim 5, characterized in that: The connecting member includes an upper shell and a base, which are buckled together and jointly enclose a first air duct and a second air duct. The first air inlet, the second air inlet, the first air outlet and the second air outlet are all arranged on the base, and the concave cavity is arranged on the upper shell.

7. The oxygen outlet passage system according to claim 6, characterized in that: The upper shell is provided with a first groove and a second groove on the end surface facing the base, the base is provided with a circle of first protrusions adapted to the first groove on the end surface facing the upper shell, and the base is provided with a circle of second protrusions adapted to the second groove on the end surface facing the upper shell. The first air inlet and the first air outlet are both connected to the space enclosed by the first protrusions, and the second air inlet and the second air outlet are both connected to the space enclosed by the second protrusions. The upper shell and the base are buckled together, the first protrusion is inserted into the first groove, and the second protrusion is inserted into the second groove.

8. The oxygen outlet passage system according to claim 6, characterized in that: The base is provided with an avoidance position, and the connecting pipe is accommodated in the avoidance position.

9. The oxygen outlet passage system according to claim 4, characterized in that: The top of the oxygen tank is provided with a positioning column, the connecting piece is provided with a positioning cylinder, the positioning cylinder is provided with an inserting through hole, and the positioning column is inserted into the inserting through hole.

10. The oxygen outlet passage system according to claim 3, characterized in that: A first accommodating groove is provided on the side of the oxygen tank, and the pulse pressure sensor, the oxygen concentration sensor and the connecting pipe are all located in the first accommodating groove.

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