Multi-channel pressure-stabilizing portable oxygen generator and control method thereof

Abstract

The invention provides a multi-channel pressure-stabilizing portable oxygen generator and a control method thereof, and belongs to the technical field of medical instruments.The oxygen generator comprises an oxygen generation unit, an oxygen supply unit and a control unit, the oxygen supply unit comprises a first switching valve, a second switching valve, a plurality of air storage tanks and a plurality of pressure sensors, an inlet of the first switching valve is connected with an outlet of the oxygen generation unit, and an outlet of the second switching valve is connected with an outlet of the control unit; a plurality of outlets of the first switching valve are connected to inlets of the gas storage tanks, a plurality of inlets of the second switching valve are connected to outlets of the gas storage tanks, and an outlet of the second switching valve is connected with a final oxygen outlet of the oxygen generator; the control unit controls the first switching valve and the second switching valve to be switched cooperatively according to pressure detection values of the air storage tanks, so that a first target air storage tank is selected through the first switching valve to be oxygenated by the oxygen generation unit, and meanwhile a second target air storage tank different from the first target air storage tank is selected through the second switching valve to supply oxygen. The influence of pressure fluctuation on oxygen output in the oxygen production process is eliminated, oxygen production and oxygen supply are physically isolated, and oxygen output is stable and continuous.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a multi-channel regulated portable oxygen concentrator and its control method. Background Technology

[0002] Portable oxygen concentrators are medical devices that provide high concentrations of oxygen to users who require oxygen therapy. Their mainstream technology is Pressure Swing Adsorption (PSA). This technology uses a compressor to pressurize air, which is then passed through a zeolite molecular sieve adsorption tower. Under pressure, nitrogen is adsorbed, thus separating oxygen.

[0003] However, the pressure swing adsorption (PSA) oxygen generation process requires periodic adsorption and desorption cycles, resulting in inherent pulsating fluctuations in the oxygen pressure output by the oxygen generation unit. Although existing equipment typically incorporates a buffer tank to smooth the pressure, the pressure fluctuations are still transmitted to the oxygen output end because oxygen generation and supply share the same gas path. This leads to unstable oxygen pressure inhaled by the user, affecting oxygen comfort and treatment effectiveness. This problem is particularly pronounced in scenarios requiring low-flow, continuous oxygen supply. While existing technologies have attempted to optimize this through improvements to the pressure equalization process, they have not fundamentally solved the problem. Summary of the Invention

[0004] This invention provides a multi-channel pressure-stabilized portable oxygen generator and its control method, which eliminates the influence of pressure fluctuations during the oxygen generation process on the output oxygen, achieves physical isolation between oxygen generation and supply, and ensures stable and continuous output oxygen.

[0005] In a first aspect, the present invention provides a multi-channel, voltage-stabilized portable oxygen concentrator, comprising: Oxygen generating unit, used to produce oxygen; An oxygen supply unit includes a first switching valve, a second switching valve, multiple gas storage tanks, and multiple pressure sensors. The pressure sensors are used to detect the gas pressure in the corresponding gas storage tank. The inlet of the first switching valve is connected to the outlet of the oxygen generating unit. The multiple outlets of the first switching valve are respectively connected to the inlet of each gas storage tank. The multiple inlets of the second switching valve are respectively connected to the outlet of each gas storage tank. The outlet of the second switching valve is connected to the final oxygen outlet of the oxygen generator. The control unit is connected to the first switching valve, the second switching valve, and the plurality of pressure sensors respectively, and is used to control the first switching valve and the second switching valve to switch in coordination according to the pressure detection value of the gas storage tank, so as to select a first target gas storage tank through the first switching valve to be filled with oxygen by the oxygen generating unit, and at the same time select a second target gas storage tank different from the first target gas storage tank to be supplied with oxygen through the second switching valve.

[0006] In some embodiments, the number of gas storage tanks is at least two.

[0007] In some embodiments, it also includes: An oxygen concentration sensor is installed at the final oxygen outlet, and the oxygen concentration detection output terminal of the oxygen concentration sensor is connected to the control unit.

[0008] In some embodiments, both the first switching valve and the second switching valve are electromagnetic multi-way valves.

[0009] In a second aspect, the present invention also provides a control method for a multi-channel voltage-stabilized portable oxygen concentrator, used to control the multi-channel voltage-stabilized portable oxygen concentrator as described in the first aspect, the control method comprising: Obtain the pressure detection value of the gas storage tank; Based on the pressure detection value, the first switching valve and the second switching valve are controlled to switch in coordination, so that the first target gas storage tank is selected by the first switching valve to be filled with oxygen by the oxygen generation unit, and at the same time, the second target gas storage tank, which is different from the first target gas storage tank, is selected by the second switching valve to supply oxygen.

[0010] In some embodiments, controlling the first switching valve and the second switching valve to switch in coordination based on the pressure detection value includes: From all the gas storage tanks that are not currently in an oxygen supply state, select the gas storage tank with the lowest pressure detection value as the first target gas storage tank, and control the inlet of the first switching valve to connect with the outlet of the corresponding first target gas storage tank. From all the gas storage tanks that are not currently in an oxygen-filled state, select the gas storage tank with the highest pressure detection value as the second target gas storage tank, and control the outlet of the second switching valve to connect with the inlet of the corresponding second target gas storage tank.

[0011] In some embodiments, after the control unit is connected to the oxygen generating unit and acquires the pressure detection value from the pressure sensor, it further includes: Compare the pressure detection value with the lowest pressure threshold and the highest pressure threshold; When the pressure detection values ​​of all the gas storage tanks are less than or equal to the minimum pressure threshold, the oxygen generation unit is controlled to start, and the inlet of the first switching valve is controlled to connect with the outlet of the corresponding first preset gas storage tank until the pressure detection value of the first preset gas storage tank reaches the maximum pressure threshold. When the pressure detection value of all the gas storage tanks is greater than or equal to the highest pressure threshold, the oxygen generation unit is controlled to stop working, and the outlet of the second switching valve is controlled to connect with the inlet of the corresponding second preset gas storage tank.

[0012] In some embodiments, it also includes: Continuously acquire the pressure detection value of the first target gas storage tank and compare the pressure detection value of the first target gas storage tank with the highest pressure threshold; When the pressure detection value of the first target gas storage tank rises to the highest pressure threshold, the oxygen generation unit is controlled to stop working. After the oxygen generation unit stops working, the pressure detection values ​​of all gas storage tanks that are not currently in oxygen supply state are obtained. If the lowest pressure detection value is less than the highest pressure threshold, the oxygen generation unit is controlled to start, and the gas storage tank with the lowest pressure detection value is selected as the new first target gas storage tank. The inlet of the first switching valve is controlled to connect with the outlet of the corresponding new first target gas storage tank. Continuously acquire the pressure detection value of the second target gas storage tank and compare the pressure detection value of the second target gas storage tank with the lowest pressure threshold; When the pressure detection value of the second target gas storage tank drops to the minimum pressure threshold, the gas storage tank with the highest pressure detection value is selected from all the remaining gas storage tanks that are not in oxygen supply state as the new second target gas storage tank, and the outlet of the second switching valve is controlled to connect with the inlet of the corresponding new second target gas storage tank.

[0013] In some embodiments, selecting the gas storage tank with the lowest or highest pressure detection value includes: When there are multiple gas storage tanks with the lowest or highest pressure detection values, they are selected according to the preset gas storage tank number sequence.

[0014] In some embodiments, after obtaining the pressure detection value of the pressure sensor, the method further includes: Compare the pressure detection value with the minimum pressure threshold; When the pressure detection values ​​of all the gas storage tanks are less than or equal to the minimum pressure threshold, the outlet of the second switching valve is controlled to connect simultaneously with the inlet of the corresponding multiple gas storage tanks to provide emergency oxygen supply, and the inlet of the first switching valve is controlled to connect with the outlet of the corresponding gas storage tank that is not currently providing emergency oxygen supply or the outlet of the third preset gas storage tank, and an alarm is triggered.

[0015] This invention, through the setting of multiple gas storage tanks and the coordinated control of a first switching valve and a second switching valve by a control unit, forcibly separates the oxygen filling path from the oxygen generating unit to the first switching valve to the first target gas storage tank from the oxygen output path from the second target gas storage tank to the second switching valve to the oxygen outlet through different gas storage tanks. This fundamentally cuts off the channel through which the periodic pressure pulses generated during the operation of the oxygen generating unit are directly transmitted to the user. The user always obtains oxygen from another gas storage tank that is in standby mode and whose pressure has become stable, thereby obtaining a constant and stable oxygen supply experience with no pressure fluctuations, significantly improving comfort and the stability of treatment effects. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced one by one below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a multi-channel, voltage-stabilized portable oxygen generator provided by the present invention.

[0018] Figure 2 This is a schematic diagram of another multi-channel voltage-stabilized portable oxygen generator provided by the present invention.

[0019] Figure 3 This is a schematic diagram of another multi-channel voltage-stabilized portable oxygen generator provided by the present invention.

[0020] Figure 4 This is a flowchart illustrating the control method for the multi-channel regulated portable oxygen generator provided by the present invention. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0022] Portable oxygen concentrators are medical devices that provide high-concentration oxygen to users who need supplemental oxygen, and are widely used in home oxygen therapy and personal outdoor activities. Currently, most mainstream portable oxygen concentrators employ pressure swing adsorption (PSA) technology. This technology uses an air compressor to pressurize air, forcing it through a molecular sieve tower containing zeolite molecular sieves. Under pressure, the molecular sieves adsorb a large amount of nitrogen from the air, separating out the oxygen.

[0023] However, traditional pressure swing adsorption (PSA) oxygen concentrators have an inherent drawback in their workflow. The molecular sieve column requires periodic cycles of pressurized adsorption and depressurized desorption, i.e., oxygen production and nitrogen removal cycles. This cyclical switching causes the oxygen pressure generated by the oxygen production unit to fluctuate in pulses. Although existing oxygen concentrators typically include a buffer tank to smooth out these pressure fluctuations, because oxygen production and supply occur in the same gas path, the pressure pulses from the oxygen production process are still directly or indirectly transmitted to the oxygen outlet. This results in inconsistent oxygen pressure inhaled by the user, affecting the comfort of oxygen use and the stability of therapeutic effects.

[0024] This issue has become a key area for technological improvement in the industry. For example, existing technologies have clearly pointed out the pressure and purity fluctuations during switching between traditional dual adsorbers, and have optimized the pressure equalization process by adding equalization pipes and valves, indirectly confirming the inherent defects of the original structure. Meanwhile, existing technologies also focus on improving the stability of oxygen production, using the lifting and lowering drive design of molecular sieve components to balance gas path pressure, further demonstrating the prevalence and severity of pressure fluctuation problems in traditional pressure swing adsorption (PSA) oxygen generators. This pressure fluctuation problem is particularly prominent for users requiring precise, continuous, and low-flow oxygen supply. Therefore, how to eliminate the impact of pressure fluctuations during oxygen production on the output oxygen and provide a stable and continuous oxygen experience is a technical problem that urgently needs to be solved in this field.

[0025] To address the aforementioned technical problems, this invention provides a portable oxygen concentrator employing the pressure swing adsorption principle. More specifically, it relates to a multi-channel portable oxygen concentrator capable of providing stable output pressure. The aim is to solve the problem of unstable output oxygen pressure caused by pressure fluctuations during the oxygen production process in traditional portable oxygen concentrators, achieving physical isolation between the oxygen production and supply processes. It is applicable to dual-channel, triple-channel, and multi-channel pressure stabilization systems to improve the stability and continuity of output oxygen.

[0026] Figure 1 This is a structural schematic diagram of a multi-channel, voltage-stabilized portable oxygen concentrator provided by the present invention. Figure 1 As shown, the multi-channel pressure-stabilized portable oxygen concentrator includes an oxygen generation unit, an oxygen supply unit, and a control unit 15. The oxygen generation unit is used to generate oxygen, and the oxygen supply unit includes a first switching valve 11, a second switching valve 12, multiple gas storage tanks, and multiple pressure sensors. Figure 1 The diagram illustrates gas storage tanks 16 to 16+n-1, where n is the number of gas storage tanks. Pressure sensors are used to detect the gas pressure inside the corresponding gas storage tank. Figure 1The diagram exemplarily illustrates pressure sensors 16+n to 16+2n-1. The inlet of the first switching valve 11 is connected to the outlet of the oxygen generating unit, and multiple outlets of the first switching valve 11 are respectively connected to the inlet of each gas storage tank. Multiple inlets of the second switching valve 12 are respectively connected to the outlet of each gas storage tank, and the outlet of the second switching valve 12 is connected to the final oxygen outlet of the oxygen generator. The control unit 15 is connected to the first switching valve 11, the second switching valve 12, and multiple pressure sensors, respectively, and is used to control the first switching valve 11 and the second switching valve 12 to switch in coordination according to the pressure detection value of the gas storage tank. The first switching valve 11 selects a first target gas storage tank to be filled with oxygen by the oxygen generating unit, while the second switching valve 12 selects a second target gas storage tank different from the first target gas storage tank to supply oxygen.

[0027] Specifically, the oxygen generation unit refers to the functional module that separates high-concentration oxygen from the air through the pressure swing adsorption principle. It consists of a filter 1, a compressor 2, a flow meter 3, a gas distribution valve 4, a throttling valve 5, a first adsorption tower 6, a second adsorption tower 7, a throttling valve 8, a one-way valve 9, and a one-way valve 10. The oxygen supply unit is responsible for storing the generated oxygen and stably supplying it to the user. The first switching valve 11 is a multi-path selection valve, which, according to the instructions of the control unit 15, guides the oxygen flow from the oxygen generation unit to a designated gas storage tank. The second switching valve 12 is a multi-path selection valve, which, according to the instructions of the control unit 15, guides the oxygen flow from a designated gas storage tank to the final oxygen outlet. The gas storage tank is a container used for temporary oxygen storage, and its volume can buffer the oxygen supply demand for a certain period of time. One gas storage tank corresponds to one oxygen supply channel. Pressure sensors are installed on the gas storage tank or connected to its pipeline, and are used to measure and provide feedback on the gas pressure inside the gas storage tank in real time. The control unit 15 is the control core of the multi-channel regulated portable oxygen generator. It can be a programmable logic controller (PLC) or a microprocessor, used to receive sensor signals, perform logical judgments, and output control commands. The first target gas storage tank is selected by the control unit 15 at a certain time to receive oxygen produced by the oxygen generator. The second target gas storage tank is selected by the control unit 15 at a certain time, and its oxygen is delivered to the user.

[0028] The oxygen generating unit operates continuously or intermittently, producing oxygen. The control unit 15 acquires the pressure detection values ​​of each pressure sensor corresponding to each gas storage tank in real time. Based on these pressure detection values, the control unit 15 generates control commands, which drive the first switching valve 11 to connect the inlet of the oxygen generating unit to the outlet leading to the first target gas storage tank, thereby introducing the oxygen generated by the oxygen generating unit into the first target gas storage tank for oxygenation. This process may be accompanied by pressure fluctuations. At the same time, the control commands drive the second switching valve 12 to connect its inlet to the second target gas storage tank to its final oxygen outlet. Since the second target gas storage tank is a separate tank from the first target gas storage tank, the oxygen stored inside is pre-filled and tends to be in pressure equilibrium, so the oxygen pressure output from it is stable. By coordinating the control of the two switching valves by the control unit 15, it is ensured that the oxygen filling process and the oxygen supply process always occur on two different gas storage tanks in time, thus achieving physical isolation in the gas path. The pressure fluctuations generated by the oxygen generation unit are limited to the first target gas storage tank that is being filled with oxygen and its related pipelines, and cannot be transmitted to the oxygen supply path of the second target gas storage tank that is being supplied with oxygen.

[0029] Therefore, by setting up multiple gas storage tanks and using the control unit 15 to coordinately control the first switching valve 11 and the second switching valve 12, the oxygen filling path from the oxygen generating unit to the first switching valve 11 to the first target gas storage tank and the oxygen output path from the second target gas storage tank to the second switching valve 12 to the oxygen outlet are physically separated through different gas storage tanks. This fundamentally cuts off the channel through which the periodic pressure pulses generated during the operation of the oxygen generating unit are directly transmitted to the user. The user always obtains oxygen from another gas storage tank that is in standby mode and whose pressure has become stable, thereby obtaining a constant pressure output and fluctuating oxygen supply experience, which significantly improves comfort and the stability of treatment effect.

[0030] Figure 2 This is a schematic diagram of another multi-channel voltage-stabilized portable oxygen generator provided by the present invention. Figure 3 This is a schematic diagram of another multi-channel, pressure-stabilized portable oxygen generator provided by the present invention. The number of gas storage tanks can be at least two, for example, as shown below. Figure 2 The diagram shows two gas storage tanks, but it can also be set up as shown. Figure 3 The number of gas storage tanks shown is three.

[0031] Specifically, such as Figure 2 As shown, when there are two gas storage tanks, the system alternates between the two tanks to perform oxygen filling and oxygen supply functions. Combined with... Figure 1 and Figure 3When the number of gas storage tanks is greater than two, in addition to the two gas storage tanks that are currently filling and supplying oxygen, the remaining gas storage tanks can serve as backup buffer units filled with oxygen, further enhancing the system's buffering capacity and switching flexibility. Therefore, by setting the number of gas storage tanks to at least two, this embodiment of the invention, while achieving the basic functions of the invention, provides more channels, i.e., more gas storage tanks, to offer redundancy and better pressure smoothing effects. This allows the system design to flexibly adapt to application scenarios with different endurance and stability requirements, enhancing the product's scalability and market adaptability.

[0032] In some embodiments, combined with Figures 1 to 3 The multi-channel voltage-stabilized portable oxygen generator also includes an oxygen concentration sensor 14, which is located at the final oxygen outlet. The oxygen concentration detection output terminal of the oxygen concentration sensor 14 is connected to the control unit 15, which is not shown in the figure.

[0033] Specifically, the oxygen concentration sensor 14 is a sensing device used to detect the volume percentage of oxygen in the airflow and is installed at the final oxygen outlet. The oxygen concentration sensor 14 directly monitors the oxygen concentration to be delivered to the user and can transmit the oxygen concentration signal to the control unit 15 in real time. The control unit 15 can display the concentration value, or trigger an alarm when the concentration is lower than a set safety threshold, or execute a predetermined safety strategy, such as reducing the flow rate or attempting to adjust the operating parameters of the oxygen generating unit.

[0034] Therefore, this embodiment of the invention adds a real-time monitoring function for the purity of the output oxygen, ensuring the quality and safety of medical-grade oxygen supply. Furthermore, concentration information can be fed back to the control unit 15, enabling the device to focus not only on pressure stability but also on oxygen concentration compliance, forming a closed-loop monitoring system for both the output oxygen pressure and purity—two key parameters—improving the product's safety and reliability and meeting the stringent standards for medical devices.

[0035] In some embodiments, combined with Figures 1 to 3 Both the first switching valve 11 and the second switching valve 12 are electromagnetic multi-way valves.

[0036] Specifically, an electromagnetic multi-way valve is an automated valve that uses an electromagnet to drive the valve core, thereby changing the connection state between multiple fluid passages. Both the first switching valve 11 and the second switching valve 12 can be implemented using electromagnetic multi-way valves. The control unit 15 outputs an electrical signal to the coil of the corresponding electromagnetic valve to precisely, quickly, and reliably control the valve core position, thereby connecting or disconnecting the designated air passage. Electromagnetic valves have a fast response speed, facilitating automated high-frequency switching, and their control method is simple, as they can be directly driven by the digital or analog output port of the control unit 15.

[0037] Therefore, this embodiment of the invention uses electromagnetic multi-way valves as the switching actuators, namely the first switching valve 11 and the second switching valve 12. These valves offer rapid response, precise control, and high reliability, making them suitable for applications requiring real-time, frequent path switching based on pressure signals. Furthermore, the electromagnetic valves are cost-effective and easily integrated with the control unit 15, which helps reduce the overall system complexity and implementation cost.

[0038] This invention also provides a control method for a multi-channel voltage-stabilized portable oxygen concentrator, used to control the multi-channel voltage-stabilized portable oxygen concentrator as described in the above embodiments. Figure 4 This is a schematic flowchart of the control method for a multi-channel, voltage-stabilized portable oxygen concentrator provided by the present invention. The control method for the multi-channel, voltage-stabilized portable oxygen concentrator can be executed by the control unit 15 provided in this embodiment of the invention. Figure 4 As shown, the control method for a multi-channel, voltage-stabilized portable oxygen concentrator includes the following steps: S101. Obtain the pressure detection value of the gas storage tank.

[0039] S102. Control the first switching valve and the second switching valve to switch in coordination according to the pressure detection value, so that the first target gas storage tank is selected by the first switching valve to be filled with oxygen by the oxygen generation unit, and at the same time, the second target gas storage tank, which is different from the first target gas storage tank, is selected by the second switching valve to supply oxygen.

[0040] Specifically, coordinated switching refers to the operation of coordinating the control of the first switching valve 11 and the second switching valve 12 in time and logically, to jointly achieve an overall working goal. The control unit 15 periodically or event-triggeredly reads the pressure detection values ​​of all pressure sensors. Then, based on preset decision logic, the core principle of which is to isolate oxygen filling and oxygen supply, the control unit 15 simultaneously or sequentially generates two sets of control commands. The first set of commands controls the first switching valve 11, connecting it to a gas storage tank selected based on the pressure detection value, i.e., the first target gas storage tank, thus opening the oxygen filling path. The second set of commands controls the second switching valve 12, connecting it to another gas storage tank selected based on the pressure detection value, i.e., the second target gas storage tank, thus opening the oxygen supply path. The core of the control method lies in the decision logic ensuring that the first target gas storage tank and the second target gas storage tank are not the same physical gas storage tank. The aforementioned judgment and selection process is continuous or repeated, thereby dynamically maintaining the physical isolation state of oxygen filling and oxygen supply. Therefore, this embodiment of the invention enables the oxygen generator to automatically and intelligently manage multiple gas storage tanks, achieving stable oxygen output without manual intervention.

[0041] In some embodiments, controlling the coordinated switching of the first switching valve 11 and the second switching valve 12 according to the pressure detection value includes: selecting the gas storage tank with the lowest pressure detection value from all gas storage tanks that are not currently in an oxygen supply state as the first target gas storage tank, and controlling the inlet of the first switching valve 11 to be connected to the outlet of the corresponding first target gas storage tank, that is, controlling the inlet of the first switching valve 11 to be connected to the outlet of the first target gas storage tank set by the first switching valve 11; selecting the gas storage tank with the highest pressure detection value from all gas storage tanks that are not currently in an oxygen supply state as the second target gas storage tank, and controlling the outlet of the second switching valve 12 to be connected to the inlet of the corresponding second target gas storage tank, that is, controlling the outlet of the second switching valve 12 to be connected to the inlet of the corresponding second target gas storage tank.

[0042] Specifically, a gas storage tank not in oxygen supply mode refers to a gas storage tank that is not currently selected by the second switching valve 12 and is not supplying oxygen to the user. A gas storage tank not in oxygen filling mode refers to a gas storage tank that is not currently selected by the first switching valve 11 and is not receiving oxygen from the oxygen generating unit. When selecting an oxygen filling target, i.e., the first target gas storage tank, the control unit 15 excludes gas storage tanks that are currently supplying oxygen to avoid conflict. Then, among the remaining gas storage tanks, the one with the lowest pressure is selected, i.e., the gas storage tank with the lowest pressure detection value is selected as the first target gas storage tank. The control unit 15 controls the inlet of the first switching valve 11 to connect with the outlet of the corresponding first target gas storage tank, following the principle of prioritizing the replenishment of the most gas-deficient gas storage tank. This is conducive to the rapid restoration of the system's reserves and makes the pressure of each gas storage tank tend to be balanced. When selecting the oxygen supply target, i.e. the second target gas storage tank, the control unit 15 excludes the gas storage tank that is being filled with oxygen to ensure isolation. Then, among the remaining gas storage tanks, the one with the highest pressure is selected, i.e., the gas storage tank with the highest pressure detection value is selected as the second target gas storage tank. The control unit 15 controls the outlet of the second switching valve 12 to connect with the inlet of the corresponding second target gas storage tank. This follows the principle of taking gas from the gas storage tank with the most sufficient pressure, which can ensure that the oxygen supply source has the most sufficient pressure reserve, thereby obtaining the most stable and longest-lasting stable oxygen supply at the user end, and reserving a more sufficient time window for switching.

[0043] Therefore, the embodiments of the present invention can maximize the efficiency of each oxygenation cycle, quickly increase the minimum pressure, and at the same time maximize the stability and battery life of each oxygen supply by utilizing the maximum pressure, thereby optimizing system performance. Under the same hardware conditions, it can achieve better pressure stability and longer effective oxygen supply time, thus improving the overall energy efficiency and user experience.

[0044] In some embodiments, the control unit 15 is connected to the oxygen generating unit. After acquiring the pressure detection value from the pressure sensor, it further includes: comparing the pressure detection value with a minimum pressure threshold and a maximum pressure threshold; when the pressure detection values ​​of all gas storage tanks are less than or equal to the minimum pressure threshold, controlling the oxygen generating unit to start, and controlling the inlet of the first switching valve 11 to connect with the outlet of the corresponding first preset gas storage tank, until the pressure detection value of the first preset gas storage tank reaches the maximum pressure threshold; when the pressure detection values ​​of all gas storage tanks are greater than or equal to the maximum pressure threshold, controlling the oxygen generating unit to stop working, and controlling the outlet of the second switching valve 12 to connect with the inlet of the corresponding second preset gas storage tank.

[0045] Specifically, the minimum pressure threshold is a preset lower pressure limit used to determine whether the gas storage tank is about to run out or whether the system needs to be started urgently. The maximum pressure threshold is a preset upper pressure limit used to determine whether the gas storage tank is full or whether the system has sufficient oxygen storage. The first preset gas storage tank is the gas storage tank designated as the priority oxygen supply target in the initialization state, for example, it can be the gas storage tank numbered first. The second preset gas storage tank is the gas storage tank designated as the oxygen supply target in the full high-pressure standby state, for example, it can be the gas storage tank numbered first.

[0046] Before the conventional pressure comparison and selection, a global status judgment is first performed. In the fully low-pressure initialization state, that is, if the pressure of all gas storage tanks is not higher than the minimum pressure threshold, such as when the equipment is powered on for the first time or oxygen consumption is extremely rapid, the system is determined to be in a deficit state. At this time, the conventional principle of selecting the lowest pressure is no longer followed. Instead, the oxygen generation unit is forcibly started, and oxygen is fixedly charged into a designated first preset gas storage tank until its pressure reaches the maximum pressure threshold. This establishes a reliable starting point for the system. In the full high-pressure standby state, if the pressure of all gas storage tanks is not lower than the maximum pressure threshold, the system is determined to be in a saturated state. At this time, in order to save energy, the control unit 15 controls the oxygen generating unit to stop working and designates the second preset gas storage tank to supply oxygen until its pressure drops below the maximum pressure threshold due to use. Then, the aforementioned control cycle is executed again. That is, from all the gas storage tanks that are not currently in the oxygen supply state, the gas storage tank with the lowest pressure detection value is selected as the first target gas storage tank, and the inlet of the first switching valve 11 is connected to the outlet of the corresponding first target gas storage tank. From all the gas storage tanks that are not currently in the oxygen filling state, the gas storage tank with the highest pressure detection value is selected as the second target gas storage tank, and the outlet of the second switching valve 12 is connected to the inlet of the corresponding second target gas storage tank.

[0047] Therefore, this embodiment of the invention, by setting dual pressure thresholds and defining processing logic under extreme pressures, enables the control system to possess complete lifecycle management capabilities. The minimum and maximum pressure thresholds define a safe and reasonable operating pressure range for each gas storage tank, preventing overcharging or over-discharging. Full low-pressure processing ensures the system can reliably start from any deficit state, while full high-pressure processing achieves intelligent energy saving, avoiding unnecessary compressor idling and enhancing the system's robustness, safety, and energy efficiency.

[0048] In some embodiments, the control method for a multi-channel pressure-stabilized portable oxygen generator further includes: continuously acquiring the pressure detection value of a first target gas storage tank and comparing the pressure detection value of the first target gas storage tank with a maximum pressure threshold; when the pressure detection value of the first target gas storage tank rises to the maximum pressure threshold, controlling the oxygen generation unit to stop working; after controlling the oxygen generation unit to stop working, acquiring the pressure detection values ​​of all gas storage tanks that are not currently in an oxygen supply state, and if the lowest pressure detection value is less than the maximum pressure threshold, controlling the oxygen generation unit to start, and selecting the gas storage tank with the lowest pressure detection value as the new first target gas storage tank, and controlling the inlet of the first switching valve to connect with the outlet of the corresponding new first target gas storage tank. Specifically, after the oxygen generation unit stops producing oxygen, there is a brief idle period. During this time, the system actively checks whether there are other gas storage tanks that need to be filled with oxygen, that is, whether there are gas storage tanks with pressure lower than the maximum pressure threshold. If so, oxygen generation should be restarted, and oxygen should be filled into the gas storage tank with the lowest pressure.

[0049] In addition, the pressure detection value of the second target gas storage tank is continuously acquired and compared with the minimum pressure threshold. When the pressure detection value of the second target gas storage tank drops to the minimum pressure threshold, the gas storage tank with the highest pressure detection value is selected from all the remaining gas storage tanks that are not in oxygen supply state as the new second target gas storage tank, and the outlet of the second switching valve 12 is connected to the inlet of the corresponding new second target gas storage tank.

[0050] Specifically, continuous acquisition refers to uninterrupted reading of sensor values ​​at a certain sampling frequency. The new second target gas storage tank is the next gas storage tank selected for oxygen supply when the pressure of the original oxygen supply gas storage tank is insufficient and needs to be switched. This embodiment of the invention describes a dynamic switching triggering mechanism in a normal working cycle, which is a parallel monitoring process. For monitoring the oxygen supply end, while supplying oxygen to the first target gas storage tank, the system continuously monitors its pressure. Once the pressure reaches or exceeds the maximum pressure threshold, a command is immediately issued to stop the oxygen generation unit. At this time, oxygen supply is completed, and the tank becomes a high-pressure standby state, maintaining the current channel configuration until a new switching condition is triggered. For monitoring the oxygen supply end, while supplying oxygen from the second target gas storage tank, the system continuously monitors its pressure. Once the pressure reaches or falls below the minimum pressure threshold, the oxygen supply switching process is immediately triggered. At this point, the control unit 15 selects the tank with the highest pressure from the remaining gas storage tanks as the new second target gas storage tank, according to the selection principle described in the aforementioned embodiment, and controls the second switching valve 12 to switch to the new second target gas storage tank. However, it is important to exclude the original second target gas storage tank that has already been depleted and the gas storage tank that may be being oxygenated. The cessation of oxygenation and the switching of oxygen supply are independent yet related events that jointly drive the evolution of the system state.

[0051] Therefore, the embodiments of the present invention clearly define the precise trigger point for state switching, making the system operation more automated and precise. Event triggering based on real-time pressure feedback avoids the mismatch problems that may be caused by switching based on fixed time, such as switching before the gas tank is full or before switching when the gas tank is depleted. This ensures that each oxygen filling is as sufficient as possible, reaching the highest pressure threshold, and that each oxygen supply switch is timely and seamless, with the corresponding pressure dropping to the lowest pressure threshold. Thus, the stability and continuity of the output pressure are continuously optimized and maintained in the dynamic process.

[0052] In some embodiments, selecting the gas storage tank with the lowest or highest pressure detection value includes: when there are multiple gas storage tanks with the lowest or highest pressure detection values, selecting them according to a preset gas storage tank number order.

[0053] Specifically, the preset numbering order of the gas storage tanks is a pre-assigned identification order for each gas storage tank, such as No. 1, No. 2, No. 3, and it is stipulated that No. 1 has a higher priority than No. 2, and so on. During the execution of the low-or-high selection logic described in the aforementioned embodiments, if two or more gas storage tanks have the same pressure detection value, and both are the lowest or both are the highest, a selection conflict will occur. To resolve this conflict, this embodiment of the invention specifies a definite decision rule, namely, selection according to a predefined numbering order. For example, when both pressures are at their lowest, the gas storage tank with the smallest number is selected as the first target gas storage tank; when both pressures are at their highest, the gas storage tank with the smallest number is selected as the second target gas storage tank, realizing a simple, definite decision rule that requires no additional sensor information.

[0054] Therefore, the embodiments of the present invention provide deterministic rules for handling boundary conditions, ensuring the completeness and predictability of the control logic. Under any stress state, the system's selection behavior is uniquely determined, avoiding the possibility of random selection or logic deadlock, and enhancing the stability and reliability of the control software.

[0055] In some embodiments, after obtaining the pressure detection value of the pressure sensor, the method further includes: comparing the pressure detection value with a minimum pressure threshold; when the pressure detection values ​​of all gas storage tanks are less than or equal to the minimum pressure threshold, controlling the outlet of the second switching valve 12 to simultaneously connect with the inlet of the corresponding multiple gas storage tanks to provide emergency oxygen supply, and controlling the inlet of the first switching valve 11 to connect with the outlet of the corresponding gas storage tank that is not currently providing emergency oxygen supply or the third preset gas storage tank, and triggering an alarm.

[0056] Specifically, emergency oxygen supply is an unconventional oxygen supply mode adopted under abnormal circumstances to maintain oxygen output to the maximum extent. Simultaneously connecting the inlet of multiple corresponding gas storage tanks means controlling the second switching valve 12 to connect its outlet in parallel with the outlet pipelines of two or more gas storage tanks. The third preset gas storage tank is the gas storage tank designated as the priority oxygen supply target under emergency oxygen supply conditions. The first, second, and third preset gas storage tanks can be the same or different.

[0057] This invention provides an emergency response strategy for the system in extreme abnormal situations, such as when the user's oxygen demand suddenly exceeds the design capacity. When the control unit 15 detects that the pressure of all gas storage tanks has dropped to or below the minimum safety pressure threshold, it determines that the conventional alternating oxygen supply mode can no longer meet the demand. At this time, the system immediately enters emergency mode. First, it maximizes oxygen supply by controlling the second switching valve 12 to connect all or as many gas storage tanks as possible, connecting them in parallel to supply oxygen to the oxygen outlet. This is equivalent to pooling all remaining oxygen reserves and outputting them at maximum flow rate to delay oxygen outage as much as possible. Simultaneously, it prioritizes restoring oxygen supply by controlling the first switching valve 11 to connect a designated gas storage tank for oxygen supply, prioritizing gas storage tanks that are not currently participating in emergency oxygen supply. If all gas storage tanks are already participating in oxygen supply, it connects a designated third preset gas storage tank, such as gas storage tank No. 1. In addition, it can immediately trigger an audible, visual, or electrical alarm to notify the user that the equipment is in a state of extreme operation. This mode continues until the pressure of any gas storage tank recovers to above the minimum pressure threshold, or until the user intervenes.

[0058] Therefore, this invention provides a failure protection and safety redundancy mechanism, greatly enhancing the safety level of the product as a medical device. In extreme cases, ensuring oxygen supply to the user is the highest priority, breaking the conventional switching logic, utilizing all reserves, and attempting to quickly restore system capacity. Simultaneously, the alarm function promptly alerts the user, preventing danger caused by lack of awareness.

[0059] In addition, during the process of coordinating the switching of the first and second switching valves based on pressure detection values ​​(i.e., executing S102), the system continuously performs status checks. When the control unit detects that the pressure detection values ​​of all gas storage tanks that are not currently in oxygen supply mode are greater than or equal to the maximum pressure threshold, it indicates that all standby gas storage tanks are full and there is no need for immediate oxygen replenishment. At this time, the control unit controls the oxygen generation unit to stop working, and the system enters a low-power standby state. This state will continuously monitor the pressure of the second target gas storage tank, i.e., the gas storage tank that is currently supplying oxygen. Once its pressure drops to a level requiring switching of the oxygen supply tank, for example, dropping to the minimum pressure threshold, a new round of channel selection and oxygen generation startup will be triggered.

[0060] The following is based on Figure 1 The following example further illustrates the control method for a multi-channel, voltage-stabilized portable oxygen generator provided in this embodiment of the invention.

[0061] First, the initial state or work cycle begins.

[0062] Monitor the real-time pressure of all gas storage tanks. ): If the pressure in all gas storage tanks is higher than the maximum pressure threshold That is, it satisfies the following formula: If the oxygen generating unit is not activated, the second switching valve 12 will connect to the first gas storage tank 16 to supply oxygen.

[0063] If the pressure in all gas storage tanks is below the minimum pressure threshold That is, it satisfies the following formula: The system will then prompt for initialization, start the oxygen generation unit, and prioritize filling the first gas storage tank 16 with oxygen. Once the pressure in the first gas storage tank 16 reaches a certain level... Afterwards, a normal operation is indicated. At this time, the second switching valve 12 is connected to the first gas storage tank 16, and the oxygen generating unit fills the second gas storage tank 17 with oxygen through the first switching valve 11.

[0064] If neither of the above two conditions is met, that is, the pressure of some gas storage tanks is between and Between, assuming the pressure of the g-th gas storage tank Highest, hth gas storage tank Lowest pressure ( That is, it satisfies the following formula: The second switching valve 12 connects to the g-th gas storage tank for oxygen supply, and the first switching valve 11 connects to the h-th gas storage tank for oxygen filling.

[0065] If multiple gas storage tanks have the same pressure ( Select the channel with the smallest number value, which satisfies the following formula: in, Representative Get all indices of the maximum value The set, Similarly, the second switching valve 12 is connected. The oxygen supply channel is connected to the oxygen generation unit via the first switching valve 11. The passageway was oxygenated.

[0066] Second, pressure monitoring and switching: Assume that the oxygen supply channel is connected to the first gas storage tank 16 and the oxygen storage channel is connected to the second gas storage tank 17.

[0067] When detected At this time, stop the oxygen generating unit and check the pressure of the first gas storage tank. ,like If so, the current oxygen supply channel will remain unchanged.

[0068] When detected At that time, the second switching valve 12 connects to the other gas storage tanks with the highest pressure. The oxygen is supplied by the gas storage tank, which satisfies the following formula: The first switching valve 11 connects to the lowest pressure gas tank among the remaining gas storage tanks. The gas storage tank is filled with oxygen, which satisfies the following formula: If multiple gas storage tanks have the same pressure ( Select the channel with the smallest number value, which satisfies the following formula: The second switching valve 12 is connected. The oxygen supply channel is connected to the oxygen generation unit via the first switching valve 11. The passageway was oxygenated.

[0069] Third, the dynamic cyclical process.

[0070] Through the above logic, the control unit 15 alternately selects the oxygen supply channel and the oxygen generation channel to ensure that the oxygen generation channel and the oxygen supply channel are not connected to the same gas storage tank at any time, thereby achieving physical isolation between oxygen generation and oxygen supply and continuous and stable oxygen supply.

[0071] Fourth, the exception handling process.

[0072] If all channel pressures are below When, the following formula is satisfied: The second switching valve 12 connects to multiple gas storage tanks for emergency oxygen supply, and the first switching valve 11 connects to the first gas storage tank 16 for oxygen filling and alarm.

[0073] The following is based on Figure 2 The following example further illustrates the control method for a multi-channel, voltage-stabilized portable oxygen generator provided in this embodiment of the invention.

[0074] Figure 2 The diagram shows a dual-channel, pressure-stabilized portable oxygen concentrator, mainly comprising an oxygen generation unit, an oxygen supply unit, and a control unit 15. The oxygen generation unit consists of a filter 1, a compressor 2, a flow meter 3, a gas distribution valve 4, a throttle valve 5, a first adsorption tower 6, a second adsorption tower 7, a throttle valve 8, a one-way valve 9, and a one-way valve 10. The oxygen supply unit consists of a first switching valve 11, a first gas storage channel including a first gas tank 16 and a first pressure sensor 18, a second gas storage channel including a second gas tank 17 and a second pressure sensor 19, and a second switching valve 12. The oxygen concentrator also includes a gas distribution valve 13, an oxygen concentration sensor 14, and the core control unit 15. The maximum and minimum pressure thresholds are set as follows: .

[0075] The oxygen generating unit is the core component for producing high-concentration oxygen. Its internal components are conventional parts used in pressure swing adsorption (PSA) oxygen generating units, and their connections and functions are well-known to those skilled in the art and will not be described further here. When the oxygen generating unit is operating, its outlet produces high-concentration oxygen with a certain pressure pulsation. The outlet of the oxygen generating unit is connected to the input of the first switching valve 11. The first switching valve 11 is a three-way valve, such as a solenoid three-way valve, with two outputs connected to the inlet of the first oxygen supply channel and the inlet of the second oxygen supply channel, respectively.

[0076] Inside the first oxygen supply channel, a first gas storage tank 16 and a first pressure sensor 18 are connected in series. Similarly, inside the second oxygen supply channel, a second gas storage tank 17 and a second pressure sensor 19 are connected in series. The first gas storage tank 16 and the second gas storage tank 17 are used to store high-concentration oxygen produced by the oxygen generation unit. The first pressure sensor 18 and the second pressure sensor 19 are used to monitor the gas pressure in their respective storage tanks in real time. The oxygen concentration sensor 14 is used to monitor the oxygen purity to ensure the quality of oxygen supply. The outlets of the first and second oxygen supply channels are connected to the two input terminals of the second switching valve 12. The second switching valve 12 can also be a three-way valve, with its output terminal connected to the final gas distribution valve 13, the oxygen concentration sensor 14, and the user's oxygen outlet.

[0077] The control unit 15 is the control center of the entire system. It receives pressure signals from the first pressure sensor 18 and the second pressure sensor 19, and outputs control signals to the first switching valve 11 and the second switching valve 12 according to the preset program logic to control the switching of the air circuit.

[0078] The specific work process is as follows: First, the initial state.

[0079] The control unit 15 detects the pressure of the first gas tank 16 and the second gas tank 17.

[0080] If both pressures are higher If the oxygen generation unit does not start, the second switching valve 12 will be connected to the first gas storage tank 16 to supply oxygen.

[0081] If the pressure of the first gas storage tank 16 Pressure of the second gas storage tank 17 Below If the first switching valve 11 is connected to the second gas storage tank 17 for oxygen filling, the second switching valve 12 is connected to the first gas storage tank 16 for oxygen supply, and vice versa.

[0082] If the pressure of both is the same and greater than But smaller than Then the first switching valve 11 is connected to the second gas storage tank 17 for oxygen filling, and the second switching valve 12 is connected to the first gas storage tank 16 for oxygen supply. If both pressures are lower If the initialization is prompted, oxygen will be added to the first gas storage tank 16 first, and the pressure inside the first gas storage tank 16 will be increased. Afterwards, a normal operation is indicated, and the first gas storage tank 16 is connected to the second switching valve 12 to supply oxygen. The oxygen generating unit is connected to the second gas storage tank 17 through the first switching valve 11 to fill with oxygen.

[0083] Second, pressure monitoring and switching.

[0084] Assume the oxygen supply channel is the first gas storage tank 16, and the oxygen storage channel is the second gas storage tank 17. When detected... If necessary, stop oxygen production; check the oxygen supply channels, such as the pressure of the second gas storage tank 17. The original oxygen supply channels will remain unchanged.

[0085] When detected Immediately switch to supplying oxygen to the first gas storage tank 16, and start the oxygen generation unit to fill the second gas storage tank 17 with oxygen.

[0086] The reverse process is similar. This cyclical alternation ensures a continuous and stable oxygen supply.

[0087] The following is based on Figure 3 The following example further illustrates the control method for a multi-channel, voltage-stabilized portable oxygen generator provided in this embodiment of the invention.

[0088] Figure 3 The image shows a three-channel voltage-stabilized portable oxygen concentrator, whose oxygen generation unit is connected to... Figure 2 The structure shown is identical. The oxygen supply unit includes three oxygen supply channels: a first oxygen supply channel containing a first gas storage tank 16 and a first pressure sensor 19; a second oxygen supply channel containing a second gas storage tank 17 and a second pressure sensor 20; and a third oxygen supply channel containing a third gas storage tank 18 and a third pressure sensor 21. The first switching valve 11 is a three-way or multi-way valve, such as a solenoid multi-way valve, used to selectively connect the outlet of the oxygen generating unit to the inlet of the three oxygen supply channels. The second switching valve 12 is similar, used to selectively connect the outlets of the three oxygen supply channels to the oxygen outlet. The control unit 15 connects all valves, pressure sensors, and the oxygen generating unit. The highest and lowest pressure thresholds are set as follows: .

[0089] The specific work process is as follows: First, the initial state.

[0090] Control unit 15 detects the pressure of the three gas tanks. If the pressure of the gas tanks in all three channels is greater than... If the oxygen generation unit does not start, the second switching valve 12 will connect to the first gas storage tank 16 to supply oxygen.

[0091] If the pressure in all three gas storage tanks is lower than If the initialization is successful, oxygen will be supplied to the first gas storage tank 16 first. Once the pressure in the first gas storage tank 16 reaches a certain level... Afterwards, a normal operation is indicated. At this time, the second switching valve 12 connects to the first gas storage tank 16 to supply oxygen, and the oxygen generating unit fills the second gas storage tank 17 with oxygen through the first switching valve 11.

[0092] If neither of the above two conditions is met, for example, if the pressure of some gas storage tanks is between and Assuming that the first gas storage tank 16 has the highest pressure and the second gas storage tank 17 has the lowest pressure, the second switching valve 12 connects to the first gas storage tank 16 to supply oxygen, and the first switching valve 11 connects to the second gas storage tank 17 to fill oxygen; if multiple gas storage tanks have the same pressure, the oxygen supply channel and the oxygen filling channel are selected according to the preset channel number sequence.

[0093] Second, pressure monitoring and switching.

[0094] Assume the oxygen supply channel is connected to the first gas storage tank 16, and the oxygen storage channel is connected to the second gas storage tank 17. When detected... At this time, stop the oxygen generating unit and check the pressure of the first gas storage tank. ,like If so, the current oxygen supply channel will remain unchanged.

[0095] When detected At that time, the second switching valve 12 connects to the second gas storage tank 17 and the third gas storage tank 18, selecting the one with the highest pressure. The gas storage tank is used to supply oxygen. The first switching valve 11 connects the first gas storage tank 16 and the third gas storage tank 17 with the lowest pressure. The gas storage tank is filled with oxygen; if multiple gas storage tanks have the same pressure, the oxygen supply channel and the oxygen filling channel are selected according to the preset channel number sequence.

[0096] Third, exception handling.

[0097] If all channel pressures are below In case of emergency, the second switching valve 12 connects to the first gas storage tank 16 and the second gas storage tank 17 for emergency oxygen supply, while the first switching valve 11 connects to the third gas storage tank 18 for oxygen filling and triggers an alarm. The three-channel design further enhances the system's buffering capacity and reliability, resulting in a more stable output pressure.

[0098] In summary, this invention employs multiple independent oxygen supply channels, each connected in series with a gas storage tank and a pressure sensor. Selective connectivity between the oxygen generation unit and the oxygen supply channel, and between the oxygen supply channel and the oxygen outlet, is achieved through a first switching valve and a second switching valve, respectively, establishing a basic structure for physical isolation between oxygen generation and supply. The control unit dynamically selects the channel with the highest pressure for oxygen supply and the channel with the lowest pressure for oxygen filling based on the real-time pressure of each gas storage tank, ensuring that the oxygen generation and supply channels do not overlap at any time, thus achieving pressure fluctuation isolation at the control level. By preset maximum or minimum pressure thresholds, the start / stop of the oxygen generation unit, channel switching, and anomaly detection are controlled, preventing overpressure or underpressure in the gas storage tanks while achieving on-demand oxygen filling, ensuring pressure stability and energy saving. When the pressure in all gas storage tanks falls below the minimum threshold, multi-channel emergency oxygen supply is triggered, with designated channels prioritized for oxygen filling. Simultaneously, an alarm linkage mechanism is set up to enhance system redundancy and safety. It supports any number of channels and adapts to different scenarios through a unified structure and control logic, possessing strong scalability. An oxygen concentration sensor and a gas distribution valve are installed at the oxygen outlet to ensure the purity of the oxygen supply and the adaptability of the output, thus improving the end-to-end guarantee of stable oxygen supply.

[0099] Compared with existing technologies, the embodiments of the present invention have the following advantages: First, stable output pressure. Through multiple independent oxygen supply channels, the oxygen generation and filling process is completely isolated from the user's oxygen supply process. The user always obtains oxygen from a stable pressure storage tank, eliminating the impact of pressure fluctuations in the oxygen generation unit on the oxygen supply unit and providing a smooth and comfortable oxygen experience. Second, uninterrupted oxygen supply. The multi-channel alternating working mode ensures that at least one storage tank is in standby mode, achieving seamless switching and guaranteeing continuous oxygen supply, which is particularly suitable for users requiring long-term oxygen therapy. Third, scalability and flexibility. The multi-channel design allows for adjustment of the number of channels according to needs; dual-channel, triple-channel, or multi-channel configurations are all possible, providing strong system scalability and adaptability to more application scenarios. Fourth, ingenious structure and easy implementation. Based on the existing oxygen concentrator platform, mainly adding mature components such as storage tanks, sensors, and switching valves, with optimized control logic, it is easy to implement and cost-effective. Fifth, energy saving and consumption reduction. Intelligent control of the oxygen generation unit's start / stop and channel switching through pressure thresholds avoids frequent operation and ineffective filling, reducing energy consumption and extending equipment life. Sixth, redundant safety protection. Multiple channels provide redundancy backup, and the dual pressure threshold design prevents overpressure or underpressure of the gas tank, improving system safety. It should also be noted that solid lines in the diagram represent gas connection relationships, while dashed lines represent electrical connection relationships.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-channel, voltage-stabilized portable oxygen concentrator, characterized in that, include: Oxygen generating unit, used to produce oxygen; An oxygen supply unit includes a first switching valve, a second switching valve, multiple gas storage tanks, and multiple pressure sensors. The pressure sensors are used to detect the gas pressure in the corresponding gas storage tank. The inlet of the first switching valve is connected to the outlet of the oxygen generating unit. The multiple outlets of the first switching valve are respectively connected to the inlet of each gas storage tank. The multiple inlets of the second switching valve are respectively connected to the outlet of each gas storage tank. The outlet of the second switching valve is connected to the final oxygen outlet of the oxygen generator. The control unit is connected to the first switching valve, the second switching valve, and the plurality of pressure sensors respectively, and is used to control the first switching valve and the second switching valve to switch in coordination according to the pressure detection value of the gas storage tank, so as to select a first target gas storage tank through the first switching valve to be filled with oxygen by the oxygen generating unit, and at the same time select a second target gas storage tank different from the first target gas storage tank to be supplied with oxygen through the second switching valve.

2. The multi-channel voltage-stabilized portable oxygen generator according to claim 1, characterized in that, The number of gas storage tanks is at least two.

3. The multi-channel voltage-stabilized portable oxygen generator according to claim 1, characterized in that, Also includes: An oxygen concentration sensor is installed at the final oxygen outlet, and the oxygen concentration detection output terminal of the oxygen concentration sensor is connected to the control unit.

4. The multi-channel voltage-stabilized portable oxygen generator according to claim 1, characterized in that, Both the first switching valve and the second switching valve are electromagnetic multi-way valves.

5. A control method for a multi-channel voltage-stabilized portable oxygen concentrator, characterized in that, The control method for controlling the multi-channel voltage-stabilized portable oxygen concentrator as described in any one of claims 1-4 includes: Obtain the pressure detection value of the gas storage tank; Based on the pressure detection value, the first switching valve and the second switching valve are controlled to switch in coordination, so that the first target gas storage tank is selected by the first switching valve to be filled with oxygen by the oxygen generation unit, and at the same time, the second target gas storage tank, which is different from the first target gas storage tank, is selected by the second switching valve to supply oxygen.

6. The control method for the multi-channel voltage-stabilized portable oxygen generator according to claim 5, characterized in that, The step of controlling the coordinated switching of the first switching valve and the second switching valve based on the pressure detection value includes: From all the gas storage tanks that are not currently in an oxygen supply state, select the gas storage tank with the lowest pressure detection value as the first target gas storage tank, and control the inlet of the first switching valve to connect with the outlet of the corresponding first target gas storage tank. From all the gas storage tanks that are not currently in an oxygen-filled state, select the gas storage tank with the highest pressure detection value as the second target gas storage tank, and control the outlet of the second switching valve to connect with the inlet of the corresponding second target gas storage tank.

7. The control method for a multi-channel voltage-stabilized portable oxygen generator according to claim 6, characterized in that, The control unit is connected to the oxygen generating unit. After acquiring the pressure detection value from the pressure sensor, it further includes: Compare the pressure detection value with the lowest pressure threshold and the highest pressure threshold; When the pressure detection values ​​of all the gas storage tanks are less than or equal to the minimum pressure threshold, the oxygen generation unit is controlled to start, and the inlet of the first switching valve is controlled to connect with the outlet of the corresponding first preset gas storage tank until the pressure detection value of the first preset gas storage tank reaches the maximum pressure threshold. When the pressure detection value of all the gas storage tanks is greater than or equal to the highest pressure threshold, the oxygen generation unit is controlled to stop working, and the outlet of the second switching valve is controlled to connect with the inlet of the corresponding second preset gas storage tank.

8. The control method for a multi-channel voltage-stabilized portable oxygen generator according to claim 6, characterized in that, Also includes: Continuously acquire the pressure detection value of the first target gas storage tank and compare the pressure detection value of the first target gas storage tank with the highest pressure threshold; When the pressure detection value of the first target gas storage tank rises to the highest pressure threshold, the oxygen generation unit is controlled to stop working. After the oxygen generation unit stops working, the pressure detection values ​​of all gas storage tanks that are not currently in oxygen supply state are obtained. If the lowest pressure detection value is less than the highest pressure threshold, the oxygen generation unit is controlled to start, and the gas storage tank with the lowest pressure detection value is selected as the new first target gas storage tank. The inlet of the first switching valve is controlled to connect with the outlet of the corresponding new first target gas storage tank. Continuously acquire the pressure detection value of the second target gas storage tank and compare the pressure detection value of the second target gas storage tank with the lowest pressure threshold; When the pressure detection value of the second target gas storage tank drops to the minimum pressure threshold, the gas storage tank with the highest pressure detection value is selected from all the remaining gas storage tanks that are not in oxygen supply state as the new second target gas storage tank, and the outlet of the second switching valve is controlled to connect with the inlet of the corresponding new second target gas storage tank.

9. The control method for a multi-channel voltage-stabilized portable oxygen concentrator according to any one of claims 6-8, characterized in that, Select the gas storage tank with the lowest or highest pressure detection value, including: When there are multiple gas storage tanks with the lowest or highest pressure detection values, they are selected according to the preset gas storage tank number sequence.

10. The control method for a multi-channel voltage-stabilized portable oxygen concentrator according to any one of claims 6-8, characterized in that, After obtaining the pressure detection value from the pressure sensor, the method further includes: Compare the pressure detection value with the minimum pressure threshold; When the pressure detection values ​​of all the gas storage tanks are less than or equal to the minimum pressure threshold, the outlet of the second switching valve is controlled to connect simultaneously with the inlet of the corresponding multiple gas storage tanks to provide emergency oxygen supply, and the inlet of the first switching valve is controlled to connect with the outlet of the corresponding gas storage tank that is not currently providing emergency oxygen supply or the outlet of the third preset gas storage tank, and an alarm is triggered.

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