A dual-mode oxygen concentrator and oxygen supply method thereof

Abstract

The present invention belongs to the technical field of medical equipment, specifically a dual-mode oxygen concentrator and an oxygen supply method thereof, wherein the oxygen concentrator comprises an oxygen production unit, a gas storage tank, a pressure regulating valve, a flow meter, an oxygen concentration pressure monitoring unit, an oxygen outlet nozzle and a respiratory monitoring unit; the oxygen production unit is connected to the gas storage tank through a pipeline provided with a one-way valve; the gas storage tank, the pressure regulating valve, the flow meter, the oxygen concentration pressure monitoring unit and the oxygen outlet nozzle are connected in sequence through pipelines to form a main gas circuit, a first gas circuit branch point is provided on the pipeline between the oxygen concentration pressure monitoring unit and the oxygen outlet nozzle, the first gas circuit branch point is connected to a detection gas circuit, and a respiratory monitoring unit is provided on the detection gas circuit. The present invention can integrate a common oxygen concentrator with continuous oxygen supply and a pulse oxygen concentrator with pulse oxygen supply into one machine, doubling the applicable population of the machine.

Description

Technical Field

[0001] The invention belongs to the technical field of medical equipment, and in particular is a dual-mode oxygen generator and an oxygen supply method thereof. Background Art

[0002] Oxygen concentrators have two oxygen supply modes: continuous oxygen supply and pulse oxygen supply. Continuous oxygen supply requires relatively low pressure and small pressure fluctuations to achieve continuous constant flow of oxygen supply; pulse oxygen supply requires relatively high pressure and pressure fluctuations from high to low, supplying a certain amount of oxygen to the user in a single time in a short period of time.

[0003] Chinese utility model patent CN206566327U discloses an oxygen concentrator that supplies oxygen with inhalation. An ultrasonic gas sensor is used as a detection element to detect human inhalation or breathing in the oxygen concentrator. The control unit makes the oxygen generation unit supply oxygen to the human body through the oxygen supply pipeline only when the human body inhales, and does not supply oxygen to the human body at other times, based on the data corresponding to the human body's inhalation detected by the ultrasonic gas sensor, thereby realizing oxygen supply with inhalation. However, the oxygen concentrator that supplies oxygen with inhalation in this patent still has only one pulse oxygen supply mode, which cannot cope with a variety of usage scenarios; the pulse frequency cannot be adjusted, and the treatment effect is single; the oxygen production efficiency is low, and the oxygen production concentration is low. Summary of the invention

[0004] The purpose of the present invention is to provide a dual-mode oxygen concentrator that can be used in a wider range of scenarios. Since the continuous oxygen supply mode has the advantages of large flow, long endurance, and strong oxygen supply capacity, the pulse oxygen supply mode can be adapted to this system to greatly improve the equivalent therapeutic effect of pulse oxygen supply to a level far exceeding that of ordinary pulse oxygen concentrators.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A dual-mode oxygen concentrator, comprising an oxygen concentrator unit, a gas storage tank, a pressure regulating valve, a flow meter, an oxygen concentration pressure monitoring unit, an oxygen outlet nozzle and a breathing monitoring unit;

[0007] The oxygen production unit is connected to the gas storage tank via a pipeline provided with a one-way valve;

[0008] The gas storage tank, the pressure regulating valve, the flow meter, the oxygen concentration pressure monitoring unit and the oxygen outlet nozzle are connected in sequence through pipelines to form a main gas circuit, and a first gas circuit branch point is arranged on the pipeline between the oxygen concentration pressure monitoring unit and the oxygen outlet nozzle, and the first gas circuit branch point is connected to a detection gas circuit, and a breathing monitoring unit is arranged on the detection gas circuit. The breathing detection unit has the functions of switching on and off and detecting a small flow rate, and the breathing detection unit has the function of detecting whether a human body is inhaling.

[0009] Furthermore, the oxygen concentrator also includes a gas block, a first on-off valve and a bypass gas path, and the gas storage tank, the gas block, the first on-off valve and the first gas path branch point are connected in sequence through pipelines to form a bypass gas path.

[0010] Preferably, a second gas circuit branch point is provided on the pipeline between the oxygen concentration pressure monitoring unit and the flow meter, and the second gas circuit branch point is connected to the third on-off valve;

[0011] When the second gas path branch point is connected to the third on-off valve, the first gas path branch point is not connected to the detection gas path.

[0012] In the present invention, both the first gas path branch point and the second gas path branch point can be connected by a tee.

[0013] Preferably, the respiratory monitoring unit is a second on-off valve and a micro-flow sensor, or a pressure difference sensor.

[0014] Preferably, the oxygen concentration and pressure monitoring unit is an oxygen concentration sensor or an oxygen pressure sensor or an integrated sensor with oxygen concentration, oxygen flow and respiratory micro-flow detection functions.

[0015] Preferably, an in-tank pressure sensor is provided on the gas storage tank.

[0016] The flow meter has the function of adjusting the output flow rate, and when the adjusted flow rate is 0, it also has the function of on and off.

[0017] The air resistance is a concentrated expression of the total air resistance of the entire bypass air path. Any fixed volume of air obtained by adding additional air resistance to the air path or without adding additional air resistance will be regarded as the equivalent air resistance of the air resistance.

[0018] The present invention also provides an oxygen supply system, which includes a blood oximeter and the above-mentioned dual-mode oxygen generator, and the dual-mode oxygen generator and the blood oximeter are connected in parallel to a control unit.

[0019] The control unit used in the present invention may be a conventional control unit in the art and can be purchased commercially.

[0020] The present invention also provides an oxygen supply method for a dual-mode oxygen concentrator, the oxygen supply method comprising the following steps:

[0021] 1) The oxygen production unit continuously produces oxygen and delivers the produced oxygen to a gas storage tank for storage; a continuous oxygen supply mode or a pulse oxygen supply mode is provided according to user needs;

[0022] 2) Continuous oxygen supply mode:

[0023] Close the detection gas circuit and the respiratory monitoring unit;

[0024] The gas storage tank outputs a constant-flow gas flow with a stable pressure through a pressure regulating valve and a flow meter, and the constant-flow gas flow with a stable pressure is output to an oxygen concentration pressure monitoring unit, which detects the oxygen concentration and flow value of the constant-flow gas flow, and finally the detected oxygen flow is continuously supplied to the user through an oxygen outlet nozzle;

[0025] Pulse oxygen supply mode:

[0026] When switching to pulse mode, the detection gas circuit and the respiratory monitoring unit are normally opened, and the flow meter is closed first;

[0027] When the user inhales, air enters from the air outlet of the respiratory monitoring unit, passes through the respiratory monitoring unit and flows to the oxygen outlet nozzle. At this time, the respiratory monitoring unit detects the flow of a small airflow, the flow meter opens, and the respiratory monitoring unit closes after a certain delay. Most of the fixed volume of gas at the rear end of the flow meter is delivered to the oxygen outlet nozzle through the oxygen concentration pressure monitoring unit, and a small part is discharged into the air after passing through the respiratory monitoring unit. The respiratory monitoring unit detects the concentration of the output oxygen through the small part of the oxygen flow that flows through. After the delivery is completed, the flow meter is closed, and the respiratory monitoring unit is opened to enter the next breathing cycle.

[0028] The present invention also provides another oxygen supply method of a dual-mode oxygen concentrator, the oxygen supply method comprising the following steps:

[0029] 1) The oxygen production unit continuously produces oxygen and delivers the produced oxygen to a gas storage tank for storage; a continuous oxygen supply mode or a pulse oxygen supply mode is provided according to user needs;

[0030] 2) Continuous oxygen supply mode:

[0031] Close the detection gas circuit and the respiratory monitoring unit; close the first on-off valve;

[0032] The gas storage tank outputs a constant-flow gas flow at a stable pressure through a pressure regulating valve and a flow meter. The constant-flow gas flow at a stable pressure passes through a first on-off valve and is output to an oxygen concentration pressure monitoring unit. The oxygen concentration pressure monitoring unit detects the oxygen concentration and flow value of the constant-flow gas flow. Finally, the detected oxygen flow is continuously supplied to the user through an oxygen outlet nozzle.

[0033] Pulse oxygen supply mode:

[0034] When switching to pulse mode, the detection gas circuit and the respiratory monitoring unit are always open, and the flow meter is closed;

[0035] When the user inhales, air enters from the air outlet of the respiratory monitoring unit, passes through the respiratory monitoring unit and flows to the oxygen outlet nozzle. At this time, the respiratory monitoring unit detects the flow of a small airflow, the first on-off valve opens, and the respiratory monitoring unit closes after a certain delay. After passing through the first on-off valve, most of the fixed volume of air is transported to the oxygen outlet nozzle through the air resistance, and a small part is discharged into the air after passing through the respiratory monitoring unit. The respiratory monitoring unit detects the concentration of the output oxygen through the small part of the oxygen flow that flows through. After the delivery is completed, the first on-off valve is closed, the respiratory monitoring unit is opened, and the next breathing cycle begins.

[0036] The flow meter used in the present invention has both flow detection and gas path on-off functions. It can also be replaced by a combination of a flow meter with a single flow detection function and an on-off valve.

[0037] The present invention adopts an oxygen concentration sensor to detect the oxygen concentration and oxygen flow rate during continuous ventilation, and can judge whether the oxygen nozzle is blocked by detecting the size of the flow rate.

[0038] The oxygen concentration and pressure monitoring unit in the present invention has the function of monitoring oxygen concentration, oxygen flow rate and oxygen flow pressure.

[0039] In the present invention, the equivalent unit of the main gas path flow meter part refers to: assuming that there are multiple devices that can adjust the stabilized pressure airflow output by the pressure regulating valve to the required constant flow airflow, these devices have different structures, appearances, and adjustment methods, but after passing through the device, the required constant flow airflow can be obtained. For example: one device relies on a stepper motor to control the size of the output flow, and the other device relies on a mechanical switch to control the size of the output flow, then these devices are called equivalent units of the above-mentioned flow meter.

[0040] In the present invention, the equivalent method of outputting a fixed volume of gas through a bypass air path refers to: assuming that there are multiple bypass air paths that can provide a fixed volume of gas with the respiratory frequency, their air resistance apertures, on-off valve switching times and pressures in the gas storage tanks are different, but the relationship between the three still satisfies the small hole jet equation, and the result obtained is still to output a fixed volume of gas that meets the current respiratory frequency, for example: the on-off valve switching time is constant, the pressure in the gas storage tank is constant, and the fixed volume of gas that meets the current respiratory frequency is obtained by adjusting the size of the air resistance aperture; or the air resistance aperture is constant, the on-off valve switching time is constant, and the fixed volume of gas that meets the current respiratory frequency is obtained by adjusting the size of the pressure in the gas storage tank. These two methods of outputting a fixed volume of gas are both referred to as equivalent methods of the first method of outputting a fixed volume of gas.

[0041] The present invention provides a method for achieving that the fixed volume of gas output is equivalent to the amount of oxygen inhaled by the user during the inhalation phase in a continuous oxygen supply mode.

[0042] Compared with the corresponding technologies, the present invention has the following beneficial effects:

[0043] The present invention can integrate a common oxygen concentrator for continuous oxygen supply and a pulse oxygen concentrator for pulse oxygen supply into one machine, thus doubling the applicable population of the machine. At the same time, different oxygen supply modes are suitable for different groups of people, but the applicable mode of the user may change with the development of the disease, changes in the environment or changes in the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a structural schematic diagram of a dual-mode oxygen concentrator according to Embodiment 1 of the present invention;

[0045] Figure 2 This is a schematic diagram of the structure of a dual-mode oxygen concentrator according to Embodiment 2 of the present invention;

[0046] Figure 3 This is a schematic diagram of the structure of a dual-mode oxygen concentrator according to Embodiment 3 of the present invention;

[0047] Figure 4 This is a schematic diagram of the structure of a dual-mode oxygen concentrator according to Embodiment 4 of the present invention;

[0048] Figure 5 This is a schematic diagram of the structure of a dual-mode oxygen concentrator according to Embodiment 5 of the present invention;

[0049] Figure 6 This is a schematic diagram of the structure of a dual-mode oxygen concentrator combined with a blood oximeter according to Example 6 of the present invention;

[0050] Reference numerals:

[0051] 1. Oxygen production unit; 2. One-way valve; 3. Gas storage tank; 4. Pressure sensor in the tank; 5. Connecting pipe; 6. Pressure regulating valve; 7. Flow meter; 8. User; 9. First gas path branch point; 10. Second on-off valve; 11. Micro flow detection sensor; 12. Oxygen concentration pressure monitoring unit; 13. Oxygen outlet; 14. Air resistance; 15. First on-off valve; 16. Pressure difference sensor; 17. Pressure sensor; 18. Third on-off valve; 19. Oximeter. DETAILED DESCRIPTION

[0052] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] Example 1

[0054] like Figure 1 As shown, a dual-mode oxygen concentrator comprises an oxygen concentrator unit 1, a gas storage tank 3, a pressure regulating valve 6, a flow meter 7, an oxygen concentration pressure monitoring unit 12, an oxygen outlet nozzle 13 and a respiratory monitoring unit;

[0055] The oxygen production unit 1 is connected to the gas storage tank 3 through a pipeline provided with a one-way valve 2;

[0056] The gas storage tank 3, the pressure regulating valve 6, the flow meter 7, the oxygen concentration pressure monitoring unit 12 and the oxygen outlet nozzle 13 are connected in sequence through the connecting pipeline 5 to form a main gas circuit. A first gas circuit branch point 9 is arranged on the pipeline between the oxygen concentration pressure monitoring unit 12 and the oxygen outlet nozzle 13. The first gas circuit branch point 9 is connected to the detection gas circuit, and a breathing monitoring unit is arranged on the detection gas circuit.

[0057] The respiratory monitoring unit includes a second on-off valve 10 and a micro-flow detection sensor 11 connected by a pipeline.

[0058] The gas storage tank 3 is provided with an in-tank pressure sensor 4 .

[0059] The oxygen concentration pressure monitoring unit adopts an oxygen concentration sensor.

[0060] The first gas path branch point 9 is connected by a three-way connection.

[0061] In this embodiment, the first gas path branch point 9 may also be arranged on the pipeline between the flow meter 7 and the pressure regulating valve 6 , or may be arranged on the pipeline between the flow meter 7 and the oxygen concentration pressure monitoring unit 12 .

[0062] In this embodiment, an on-off valve may be provided on the pipeline between the pressure regulating valve 6 and the flow meter 7 to realize the corresponding gas circuit on-off function.

[0063] The present invention integrates two contradictory oxygen supply modes into one oxygen production system;

[0064] The dual-mode oxygen generator of the present embodiment comprises: an oxygen production unit, a gas storage tank and a gas passage, wherein the oxygen production unit can continuously produce oxygen and deliver the produced oxygen to the gas storage tank for storage, wherein the gas passage comprises: a gas storage tank, a pressure sensor in the tank (for detecting a gas pressure value), a connecting pipeline, a pressure regulating valve, a flow meter, an on-off valve (for controlling the on-off of the connecting pipeline), a three-way connection, a micro-flow detection sensor, an oxygen concentration sensor and an oxygen outlet nozzle, wherein the pressure sensor in the tank detects the pressure in the gas storage tank, the gas outlet of the gas storage tank is connected to the pressure regulating valve through the connecting pipeline, the pressure regulating valve outputs the fluctuating pressure value in the gas storage tank as an air flow with a stable pressure value, and outputs it to the flow meter, the flow meter is connected to the oxygen concentration sensor, the oxygen concentration sensor is connected to the air inlet end of the three-way connection, one end of the three-way connection is connected to the detection gas path connected with the second on-off valve and the micro-flow detection sensor, and the other end is connected to the oxygen outlet nozzle, the oxygen concentration sensor detects the oxygen concentration and flow value of the constant flow air flow, and finally the oxygen with a concentration reaching the standard and a constant flow is delivered to the user from the oxygen outlet nozzle.

[0065] When the device is in the continuous oxygen supply mode, the breathing detection circuit composed of the second on-off valve and the micro-flow detection sensor is closed and does not work, and the flow meter is normally open. At this time, the pressure regulating valve is set to a lower pressure value to output the fluctuating pressure value in the gas storage tank as an airflow with a stable pressure value. The flow meter adjusts the stable pressure airflow to the required constant flow airflow and outputs it to the oxygen concentration sensor. The oxygen concentration sensor detects the oxygen concentration and flow value of the constant flow airflow, and finally the detected oxygen flow is continuously supplied to the user through the oxygen outlet nozzle;

[0066] When the device switches to pulse mode, the second on-off valve is normally open, the flow meter is temporarily closed, and the pressure regulating valve is fully opened, and it no longer plays a role in regulating pressure. It is equivalent to connecting the gas tank directly to the flow meter. The flow meter adjusts the outlet to a smaller aperture and acts as a fixed aperture gas block. When the user inhales, air enters from the outlet of the micro-flow detection sensor, passes through the air inlet of the micro-flow detection sensor, and flows to the oxygen outlet nozzle after passing through the second on-off valve and the three-way. At this time, the micro-flow detection sensor detects the flow of a small air flow, the flow meter opens, and the second on-off valve is closed after a certain delay. Most of the fixed volume of gas at the rear end of the flow meter is transported to the oxygen outlet nozzle through the connecting pipeline, and a small part flows through the first outlet of the three-way through the micro-flow detection sensor and is discharged into the air. The micro-flow detection sensor detects the oxygen concentration of the output oxygen through the small part of the oxygen flow flowing through. After the delivery is completed, the flow meter is temporarily closed, and the second on-off valve is opened to enter the next breathing cycle. Its characteristics are: concentrating two oxygen supply modes on a set of gas circuit systems.

[0067] Example 2

[0068] like Figure 2 As shown, a dual-mode oxygen concentrator comprises an oxygen concentrator unit 1, a gas storage tank 3, a pressure regulating valve 6, a flow meter 7, an oxygen concentration pressure monitoring unit 12, an oxygen outlet nozzle 13 and a respiratory monitoring unit;

[0069] The oxygen production unit 1 is connected to the gas storage tank 3 through a pipeline provided with a one-way valve 2;

[0070] The gas storage tank 3, the pressure regulating valve 6, the flow meter 7, the oxygen concentration pressure monitoring unit 12 and the oxygen outlet nozzle 13 are connected in sequence through the connecting pipeline 5 to form a main gas circuit. A first gas circuit branch point 9 is arranged on the pipeline between the oxygen concentration pressure monitoring unit 12 and the oxygen outlet nozzle 13. The first gas circuit branch point 9 is connected to the detection gas circuit, and a breathing monitoring unit is arranged on the detection gas circuit.

[0071] The oxygen concentrator further includes an air block 14, a first on-off valve 15 and a bypass air path, wherein the air storage tank 3, the air block 14, the first on-off valve 15 and the first air path branch point 9 are sequentially connected by pipelines to form a bypass air path. The respiratory monitoring unit includes a second on-off valve 10 and a micro-flow detection sensor 11 connected by pipelines.

[0072] The gas storage tank 3 is provided with an in-tank pressure sensor 4 .

[0073] The oxygen concentration pressure monitoring unit adopts an oxygen concentration sensor.

[0074] The first gas path branch point 9 is connected by a three-way connection.

[0075] In this embodiment, an on-off valve may be provided on the pipeline between the pressure regulating valve 6 and the flow meter 7 to realize the corresponding gas circuit on-off function.

[0076] In this embodiment, in order to reduce the complexity of pressure control of a gas passage, the entire gas passage system can be split into two gas passages with high and low pressure separations. The two gas passages are divided into a main gas passage and a bypass gas passage. The two passages operate independently. The main gas passage can continuously deliver the oxygen stored in the gas tank to the user; the bypass gas passage supplies the oxygen stored in the gas tank when the user inhales, and stops supplying gas when the user exhales. The main gas circuit includes a gas storage tank, a pressure sensor in the tank (to detect the gas pressure value), a pressure regulating valve, a connecting pipeline, an on-off valve (to control the on-off of the connecting pipeline), a flow meter, an oxygen concentration sensor, and an oxygen outlet nozzle. The pressure sensor in the tank detects the pressure in the gas storage tank. The air inlet end of the pressure regulating valve is connected to the gas storage tank, and the fluctuating pressure value in the gas storage tank is output as an airflow with a stable pressure value. The pressure-stabilized airflow at the air outlet end of the pressure regulating valve is delivered to the air inlet end of the flow meter. The air outlet end of the flow meter adjusts the pressure-stabilized airflow to the required constant flow airflow and delivers it to the air inlet end of the oxygen concentration sensor. The oxygen concentration sensor detects the oxygen concentration and flow value of the constant flow airflow. Finally, the oxygen with a concentration that meets the standard and a constant flow is connected to the oxygen outlet nozzle from the air outlet end of the oxygen concentration sensor and delivered to the user. The above-mentioned components are connected in series to form a gas passage using connecting pipelines.

[0077] The bypass air path includes a gas storage tank, a pressure sensor in the tank (to detect the gas pressure value), a connecting pipeline, an air block, two on-off valves (to control the on-off of the connecting pipeline), a three-way valve, a micro-flow detection sensor, and an oxygen outlet nozzle. The pressure sensor in the tank detects the pressure in the gas storage tank. The gas storage tank is connected to the air block through a connecting pipeline. A small hole with a constant area in the middle of the air block is used to control the flow of the high-pressure gas in the gas storage tank through the air block. The air block is connected to the first on-off valve through a connecting pipeline. The switching time of the first on-off valve can be controlled to output a fixed volume of gas that meets the current breathing frequency. The rear end of the first on-off valve is connected to the three-way air inlet. The first air outlet of the three-way valve is connected to the oxygen outlet nozzle. The second air outlet of the three-way valve is connected to the second on-off valve. The rear end of the second on-off valve is connected to the air inlet of the micro-flow detection sensor. The micro-flow detection sensor The air outlet is connected to the air. When the bypass airway is used for ventilation, the flow meter is normally closed (indicating that the main airway is closed), the first on-off valve is closed first, and the second on-off valve is opened. When the user inhales, air enters from the air outlet of the micro-flow detection sensor, passes through the air inlet of the micro-flow detection sensor, and flows to the oxygen outlet nozzle after passing through the second on-off valve. At this time, the micro-flow detection sensor detects the flow of a tiny airflow, the first on-off valve is opened, and the second on-off valve is closed after a certain delay. Most of the fixed volume of gas at the rear end of the first on-off valve is transported to the oxygen outlet nozzle through the first air outlet of the tee, and a small part is discharged into the air after passing through the micro-flow detection sensor. The micro-flow detection sensor detects the oxygen concentration of the output oxygen through the small part of the oxygen flow that flows through. After the delivery is completed, the first on-off valve is closed, and the second on-off valve is opened to enter the next breathing cycle.

[0078] In this embodiment, two gas passages are connected in parallel through a three-way connection at the front end of the oxygen outlet nozzle. The characteristics are: when the continuous gas supply mode is required, the first on-off valve and the second on-off valve of the bypass gas passage are closed, the bypass gas passage is blocked, and the main gas passage works normally; when pulse oxygen supply is required, the flow meter of the main gas passage is closed, the main gas passage is blocked, and the bypass gas passage works normally. The output fixed volume of gas is equivalent to the amount of oxygen inhaled by the user in the inhalation stage in the continuous oxygen supply mode, which increases the oxygen utilization efficiency by 2-3 times; the two oxygen supply passages can share a set of oxygen production units, such as Figure 2 shown.

[0079] Example 3

[0080] like Figure 3 As shown, a dual-mode oxygen concentrator comprises an oxygen concentrator unit 1, a gas storage tank 3, a pressure regulating valve 6, a flow meter 7, an oxygen concentration pressure monitoring unit 12, an oxygen outlet nozzle 13 and a respiratory monitoring unit;

[0081] The oxygen production unit 1 is connected to the gas storage tank 3 through a pipeline provided with a one-way valve 2;

[0082] The gas storage tank 3, the pressure regulating valve 6, the flow meter 7, the oxygen concentration pressure monitoring unit 12 and the oxygen outlet nozzle 13 are connected in sequence through the connecting pipeline 5 to form a main gas circuit. A first gas circuit branch point 9 is arranged on the pipeline between the oxygen concentration pressure monitoring unit 12 and the oxygen outlet nozzle 13. The first gas circuit branch point 9 is connected to the detection gas circuit, and a breathing monitoring unit is arranged on the detection gas circuit.

[0083] The oxygen concentrator further comprises an air block 14 , a first on-off valve 15 and a bypass air path, wherein the air storage tank 3 , the air block 14 , the first on-off valve 15 and the first air path branch point 9 are sequentially connected by pipelines to form a bypass air path. The respiratory monitoring unit is a pressure difference sensor 16 .

[0084] The gas storage tank 3 is provided with an in-tank pressure sensor 4 .

[0085] The oxygen concentration pressure monitoring unit adopts an oxygen concentration sensor.

[0086] The first gas path branch point 9 is connected by a three-way connection.

[0087] In this embodiment, an on-off valve may be provided on the pipeline between the pressure regulating valve 6 and the flow meter 7 to realize the corresponding gas circuit on-off function.

[0088] Compared with Example 2, this embodiment adopts a differential pressure sensor to replace the breathing detection branch composed of the micro-flow detection sensor and the second on-off valve, and adopts a differential pressure sensor connected in series on the bypass air path to realize breathing monitoring. At this time, the oxygen concentration value of the output gas cannot be detected in the pulse gas supply mode. The flow meter on the main air path can be intermittently opened for a short time to allow a small amount of oxygen to pass through the oxygen concentration sensor on the main air path to detect the oxygen concentration.

[0089] This embodiment uses an oxygen concentration sensor to detect the oxygen concentration and oxygen flow rate during continuous ventilation, and can determine whether the oxygen nozzle is blocked by detecting the flow rate.

[0090] Example 4

[0091] like Figure 4 As shown, a dual-mode oxygen concentrator comprises an oxygen concentrator unit 1, a gas storage tank 3, a pressure regulating valve 6, a flow meter 7, a pressure sensor 17, an oxygen outlet nozzle 13 and a respiratory monitoring unit;

[0092] The oxygen production unit 1 is connected to the gas storage tank 3 through a pipeline provided with a one-way valve 2;

[0093] The gas storage tank 3, the pressure regulating valve 6, the flow meter 7, the pressure sensor 17 and the oxygen outlet nozzle 13 are connected in sequence through the connecting pipeline 5 to form a main gas circuit. A first gas circuit branch point 9 is arranged on the pipeline between the pressure sensor 17 and the oxygen outlet nozzle 13. The first gas circuit branch point 9 is connected to the detection gas circuit, and a respiratory monitoring unit is arranged on the detection gas circuit.

[0094] The oxygen concentrator further includes an air block 14, a first on-off valve 15 and a bypass air path, wherein the air storage tank 3, the air block 14, the first on-off valve 15 and the first air path branch point 9 are sequentially connected by pipelines to form a bypass air path. The respiratory monitoring unit includes a second on-off valve 10 and a micro-flow detection sensor 11 connected by pipelines.

[0095] The gas storage tank 3 is provided with an in-tank pressure sensor 4 .

[0096] This embodiment uses the pressure sensor 17 as the oxygen concentration pressure monitoring unit.

[0097] The first gas path branch point 9 is connected by a three-way connection.

[0098] In this embodiment, an on-off valve may be provided on the pipeline between the pressure regulating valve 6 and the flow meter 7 to realize the corresponding gas circuit on-off function.

[0099] In this embodiment, a pressure sensor is used instead of an oxygen concentration sensor as an oxygen concentration pressure monitoring unit. In the continuous oxygen supply mode, the second on-off valve on the bypass air path is intermittently opened and closed after a small amount of oxygen flows through. The oxygen concentration is detected by a micro-flow detection sensor, and the flow rate is manually adjusted and fixed by using a mechanical flow meter. The pressure sensor is used to determine whether the oxygen nozzle is blocked.

[0100] Example 5

[0101] like Figure 5 As shown, a dual-mode oxygen concentrator comprises an oxygen concentrator unit 1, a gas storage tank 3, a pressure regulating valve 6, a flow meter 7, an oxygen concentration pressure monitoring unit 12, an oxygen outlet nozzle 13 and a respiratory monitoring unit;

[0102] The oxygen production unit 1 is connected to the gas storage tank 3 through a pipeline provided with a one-way valve 2;

[0103] The gas storage tank 3, the pressure regulating valve 6, the flow meter 7, the oxygen concentration pressure monitoring unit 12 and the oxygen outlet nozzle 13 are connected in sequence through the connecting pipeline 5 to form a main gas circuit, and a first gas circuit branch point 9 is set on the pipeline between the oxygen concentration pressure monitoring unit 12 and the oxygen outlet nozzle 13.

[0104] The oxygen concentrator further comprises an air block 14, a first on-off valve 15 and a bypass air path. The air storage tank 3, the air block 14, the first on-off valve 15 and the first air path branch point 9 are sequentially connected through pipelines to form a bypass air path.

[0105] The gas storage tank 3 is provided with an in-tank pressure sensor 4 .

[0106] The oxygen concentration pressure monitoring unit adopts an integrated sensor with oxygen concentration, oxygen flow and respiratory micro-flow detection functions.

[0107] The first gas path branch point 9 is connected by a three-way connection.

[0108] A second gas path branch point is provided on the pipeline between the oxygen concentration pressure monitoring unit 12 and the flow meter 7 , and the second gas path branch point is connected to the third on-off valve 18 .

[0109] In order to simplify the structure and improve reliability, this embodiment replaces the oxygen concentration sensor on the main gas path and the micro-flow detection sensor on the branch with an integrated sensor that can detect oxygen concentration, flow and respiratory micro-flow, making the two gas paths more integrated. When in the continuous gas supply mode, the third on-off valve and the first on-off valve on the bypass gas path are closed, and the integrated sensor acts as an oxygen concentration sensor; when in the pulse oxygen supply mode, the flow meter on the main gas path is closed, and the first on-off valve on the bypass gas path is opened. At this time, the integrated sensor acts as a micro-flow detection sensor and forms a respiratory detection branch with the third on-off valve, and the integrated sensor and the third on-off valve are used as a respiratory monitoring unit.

[0110] Example 6

[0111] like Figure 6 As shown, based on the aforementioned embodiments 1-5, the dual-mode oxygen concentrator can be used in parallel with the blood oximeter 19 to construct an intelligent health control system, and the blood oximeter is added to detect the user's blood oxygen saturation. When the blood oxygen concentration of the user 8 is still lower than 95% under long-term continuous oxygen supply, the oxygen concentrator automatically adjusts the oxygen supply mode to the pulse oxygen supply mode to improve the treatment effect. When the blood oxygen saturation of the user 8 increases to above 98%, the oxygen concentrator switches back to the continuous oxygen supply mode and voice prompts the user that the blood oxygen saturation has returned to normal, thereby avoiding oxygen poisoning caused by long-term high-efficiency oxygen production.

[0112] Any contents not described in detail in the present invention can be based on the conventional technical knowledge in the art.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that any modification or equivalent replacement of the technical solutions of the present invention does not depart from the spirit and scope of the technical solutions of the present invention and should be included in the scope of the claims of the present invention.

Claims

1. A dual-mode oxygen concentrator, characterized in that: The oxygen generator includes an oxygen production unit, a gas storage tank, a pressure regulating valve, a flow meter, an oxygen concentration pressure monitoring unit, and an oxygen outlet nozzle; The oxygen production unit is connected to the gas storage tank via a pipeline provided with a one-way valve; The gas storage tank, the pressure regulating valve, the flow meter, the oxygen concentration pressure monitoring unit and the oxygen outlet nozzle are connected in sequence through pipelines to form a main gas circuit, and a first gas circuit branch point is arranged on the pipeline between the oxygen concentration pressure monitoring unit and the oxygen outlet nozzle; The oxygen concentrator further comprises an air block, a first on-off valve and a bypass air path, wherein the air storage tank, the air block, the first on-off valve and the first air path branch point are sequentially connected through pipelines to form a bypass air path; A second gas circuit branch point is arranged on the pipeline between the oxygen concentration pressure monitoring unit and the flow meter, and the second gas circuit branch point is connected to the third on-off valve; The oxygen concentration pressure monitoring unit is an integrated sensor with oxygen concentration, oxygen flow and respiratory micro-flow detection functions.

2. The dual-mode oxygen concentrator according to claim 1, characterized in that: The gas storage tank is provided with an in-tank pressure sensor.

3. An oxygen supply system, characterized in that: The oxygen supply system comprises a blood oximeter and the dual-mode oxygen concentrator according to any one of claims 1 to 2, and the dual-mode oxygen concentrator and the blood oximeter are connected in parallel to a control unit.

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