Intelligent control system and method for plateau vehicle-mounted oxygenerator

Abstract

The invention discloses an intelligent control system for a plateau vehicle-mounted oxygenerator, and the system comprises a control unit which takes an integrated circuit as a carrier; the oxygen supply execution unit comprises a mechanical air valve for controlling oxygen flow and a two-position three-way electric control valve for switching snorting / dispersing modes; the environment sensing unit integrates an air sensor, an atmospheric pressure sensor and a Beidou navigation positioning signal receiver and is used for collecting oxygen concentration, atmospheric pressure and altitude data; the state monitoring unit is used for collecting the running state of the oxygen generator; the communication unit supports local and remote communication; and a safe power supply unit. Through multi-sensor data fusion, real-time analysis is carried out based on a built-in algorithm, the oxygen flow is accurately controlled, the oxygen generator is adaptive to different altitude environments, meanwhile, intelligent mode switching, running state safety monitoring and remote management of the oxygen generator are achieved, and the oxygen supply efficiency, safety and user experience in plateau driving are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle-mounted oxygen generation technology, specifically to an intelligent control system and method for a high-altitude vehicle-mounted oxygen generator. Background Technology

[0002] With the economic and social development of plateau regions, vehicles are increasingly used as a primary means of transportation. However, as altitude increases, atmospheric pressure and the partial pressure of oxygen in the air decrease significantly, easily leading to acute altitude sickness among drivers and passengers entering plateau areas. In severe cases, this can even cause life-threatening conditions such as pulmonary edema and cerebral edema, seriously affecting driving safety and the health of personnel. People who rush to plateaus are prone to altitude sickness. Statistics show that the incidence of altitude sickness is 25%–43% among travelers at altitudes of 2000–4300m, and 56% among railway construction workers at altitudes of 3500–5000m.

[0003] To address the problem of oxygen deficiency at high altitudes, in-vehicle oxygen concentrators have emerged. Most existing in-vehicle oxygen concentrators use simple on / off controls or manual adjustment modes. Their operating mode is relatively fixed, usually requiring users to manually adjust the oxygen flow rate based on their own feeling or experience. However, the high-altitude environment is complex and changeable; the vehicle's altitude changes rapidly during travel, causing dynamic changes in environmental parameters (such as atmospheric pressure and oxygen concentration). A fixed-flow oxygen supply mode cannot accurately match this rapidly changing environmental demand: when the altitude increases sharply, the oxygen supply may be insufficient, failing to effectively prevent altitude sickness; when the altitude decreases, it may result in a large oxygen flow rate and excessively high oxygen concentration, leading to fire risks or oxygen intoxication risks.

[0004] Furthermore, existing vehicle-mounted oxygen concentrator systems suffer from low integration and lack comprehensive intelligent sensing and control capabilities. Specifically, they exhibit the following limitations: **Simple Control Strategy:** Most systems do not fully consider the combined effects of multiple parameters such as altitude, atmospheric pressure, and ambient oxygen concentration. They lack intelligent algorithms based on multi-sensor data fusion for real-time, precise oxygen flow control, resulting in insufficient automation and intelligence. **Simple Functional Modes:** They typically lack automatic switching between different oxygen inhalation modes, such as nasal inhalation and diffusion, failing to meet users' differentiated oxygen needs in various scenarios (e.g., while driving and resting). **Lack of Safety Monitoring and Remote Management:** The lack of real-time monitoring and safety protection mechanisms for the oxygen concentrator's critical operating status (e.g., temperature, compressor load) poses safety hazards. Additionally, the absence of IoT-based remote monitoring and control functions hinders fleet management and remote fault diagnosis. **Poor Vehicle Adaptability:** The complex vehicle power environment presents issues such as voltage fluctuations, battery depletion, and electromagnetic interference. The power supply system of ordinary oxygen concentrators may not operate stably and reliably, affecting equipment lifespan and safety, and even impacting normal vehicle use.

[0005] Therefore, there is an urgent need in this field for a high-altitude vehicle-mounted oxygen generator control system and method that can adapt to the complex environment of high altitudes, achieve precise intelligent control, have a sound safety monitoring mechanism, and be suitable for vehicle-mounted scenarios, so as to overcome the above-mentioned defects of the existing technology. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention proposes an intelligent control system and method for a vehicle-mounted oxygen generator in high-altitude environments. The aim is to design an intelligent control system for the vehicle-mounted oxygen generator to adapt to the complex environment at high altitudes and achieve precise and intelligent control of oxygen supply.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: On one hand, this patent provides an intelligent control system for a high-altitude vehicle-mounted oxygen concentrator, comprising: a control unit, using an integrated circuit as the carrier of the control firmware; an oxygen supply execution unit, electrically connected to the control unit, the oxygen supply execution unit including a mechanical valve for adjusting the oxygen output flow rate and a two-position three-way electrically controlled valve for switching between nasal inhalation and diffusion oxygen inhalation modes; an environmental sensing unit, communicatively connected to the control unit, for collecting real-time parameters of the environment in which the oxygen concentrator is located; the environmental sensing unit includes at least an oxygen concentration sensor for detecting oxygen concentration, a carbon dioxide concentration sensor for detecting carbon dioxide concentration, an atmospheric pressure sensor for detecting atmospheric pressure, and a Beidou navigation positioning signal receiver for detecting altitude; a status monitoring unit, communicatively connected to the control unit, for collecting the operating status parameters of the oxygen concentrator itself; a communication unit, integrated with or connected to the control unit, for realizing the reception of local and remote oxygen concentrator control commands and the uploading of oxygen concentrator status data; and a power supply unit, electrically connected to the control unit, the oxygen supply execution unit, the environmental sensing unit, the status monitoring unit, and the communication unit, for providing safe and reliable vehicle-mounted power to the system.

[0008] Preferably, the control unit is configured to: receive real-time parameters collected by the environmental sensing unit, and based on these parameters, perform analysis and decision-making through a built-in algorithm, issue control commands to the oxygen supply execution unit, and adjust the opening of the mechanical valve in real time to adapt to the oxygen flow requirements at different altitudes.

[0009] Preferably, the status monitoring unit includes at least one of a temperature sensor for monitoring the internal temperature of the oxygen generator, a current sensor for monitoring the operating status of the compressor, or a vibration sensor.

[0010] Preferably, the communication unit includes at least one of the following: a 4G / 5G mobile communication module, a narrowband IoT module, a Wi-Fi module, a Bluetooth module, and a CAN bus interface.

[0011] Preferably, the power supply unit includes an on-board power conversion module, an overvoltage protection circuit, an overcurrent protection circuit, a power loss protection circuit, and a reverse connection protection circuit.

[0012] Preferably, the system further includes a human-machine interaction unit connected to the control unit, used to display the working status of the oxygen concentrator, environmental parameters, and receive local control commands from the user; the human-machine interaction unit is a combination of a touch screen, physical buttons and indicator lights, or a mobile terminal APP.

[0013] On the other hand, this patent provides an intelligent control method for the oxygen concentrator of the system, including the following steps: real-time collection of oxygen concentration, atmospheric pressure, and altitude data of the environment where the oxygen concentrator is located through an environmental sensing unit; real-time collection of operating status data of the oxygen concentrator through a status monitoring unit; the control unit receiving the environmental data and status data, and using the altitude, atmospheric pressure, and oxygen concentration data as input, calculating the current optimal target oxygen flow rate value through a preset algorithm model; the control unit comparing the current oxygen flow rate with the target oxygen flow rate value, and generating control commands to drive the mechanical valve to adjust the oxygen flow rate to the target value; simultaneously, according to the user's selected oxygen inhalation mode command, the control unit drives the two-position three-way electrically controlled valve to switch to the corresponding nasal inhalation or diffusion oxygen supply path; and uploading the operating status data and environmental data of the oxygen concentrator to a remote monitoring platform through a communication unit, and receiving control commands from local or remote sources.

[0014] Preferably, the step of "calculating the current optimal target oxygen flow rate value through a preset algorithm model" specifically includes: using altitude as the main control variable, obtaining the basic oxygen flow rate setting value by querying a preset "altitude-oxygen flow rate" mapping table; and using atmospheric pressure and / or ambient oxygen concentration as compensation variables to correct the basic oxygen flow rate setting value to obtain the final target oxygen flow rate value.

[0015] Preferably, the system further includes a safety control step: the control unit continuously monitors the data from the status monitoring unit; when any of the following conditions are detected, such as the internal temperature of the oxygen concentrator exceeding the safety threshold, the compressor operating current being abnormal, or the vibration amplitude exceeding the limit, the system determines the condition as a fault and executes a safety strategy; the safety strategy includes: issuing an alarm, reducing the operating power of the oxygen concentrator, or cutting off the power supply to the oxygen concentrator.

[0016] This invention discloses an intelligent control system for a vehicle-mounted oxygen concentrator used in high-altitude areas. The system includes: a control unit, based on an integrated circuit; an oxygen supply execution unit, including a mechanical valve for controlling oxygen flow and a two-position three-way electrically controlled valve for switching between nasal inhalation and diffusion modes; an environmental sensing unit, integrating an air sensor, an atmospheric pressure sensor, and a BeiDou navigation positioning signal receiver, for collecting oxygen concentration, atmospheric pressure, and altitude data; a status monitoring unit for collecting the operating status of the oxygen concentrator; a communication unit supporting local and remote communication; and a safe power supply unit. This invention, through multi-sensor data fusion, analyzes and precisely controls oxygen flow in real time based on a built-in algorithm, adapting to different altitude environments. It also achieves intelligent mode switching, safe monitoring of operating status, and remote management of the oxygen concentrator, significantly improving oxygen supply efficiency, safety, and user experience during high-altitude driving. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a high-altitude vehicle-mounted oxygen generator control system provided by the present invention.

[0018] Figure 2 This invention provides an intelligent control method for an oxygen generator. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1 Figure 1 This invention provides a schematic diagram of a high-altitude vehicle-mounted oxygen generator control system, as shown below. Figure 1 As shown, this embodiment provides an intelligent control system for a vehicle oxygen generator in high-altitude areas. Its core lies in achieving adaptive and precise control of the onboard oxygen generator through multi-sensor data fusion and intelligent algorithms. The system specifically includes the following components: The control unit 100 is the brain of the system and uses a self-developed integrated circuit as its hardware platform. This integrated circuit integrates a microcontroller (MCU), such as STMicroelectronics' STM32F407 series chip, which has high processing power and rich peripheral interfaces. The MCU is programmed with control firmware specifically developed for this system, which is responsible for data processing, algorithm execution, and issuing control commands.

[0021] The environmental perception unit 200 is responsible for collecting real-time external environmental parameters of the vehicle, providing a data foundation for intelligent control. Among them, the Beidou navigation and positioning signal receiver 204 uses a domestically produced Beidou second-generation / third-generation positioning module to obtain the vehicle's current altitude data in real time, which is the main control variable for oxygen flow control.

[0022] The atmospheric pressure sensor 203 uses a Bosch BMP380 digital barometer to measure ambient atmospheric pressure (unit: kPa) in real time. Because atmospheric pressure varies with weather and slight terrain variations, it can be used to compensate for pure altitude control.

[0023] The carbon dioxide sensor 202 employs a non-dispersive infrared sensor, calculating CO2 concentration by measuring the absorption of infrared light at a specific wavelength (4.26 μm). Its physical principle is clear, it is minimally affected by interference from other gases, and the measurement results are highly accurate and reliable. The oxygen generator increases oxygen concentration without affecting the non-dispersive infrared sensor's CO2 measurement. In contrast, sensors based on other principles (such as chemical sensors) may be susceptible to cross-gas interference.

[0024] The oxygen concentration sensor 201 uses an electrochemical or zirconium oxide oxygen sensor to monitor the oxygen concentration inside the vehicle in real time. This data can be used as a reference for system performance evaluation and auxiliary compensation.

[0025] The oxygen concentration sensor 201, carbon dioxide sensor 202, atmospheric pressure sensor 203, and Beidou navigation and positioning signal receiver 204 are all connected to the control unit via I2C or UART serial communication interfaces.

[0026] The oxygen supply execution unit 300 receives instructions from the control unit and directly operates the airflow of the oxygen generator.

[0027] Mechanical valve 301 employs a high-precision stepper motor-driven proportional valve as the oxygen flow control mechanism. The control unit precisely controls the valve opening by adjusting the pulse signal sent to the stepper motor driver, thereby achieving stepless adjustment of the oxygen output flow rate within the range of 0-5 L / min.

[0028] The oxygen concentration sensor 302 is installed downstream of the mechanical valve 301 because the oxygen delivered to the user is only after the flow rate has been regulated by the valve. Measuring this location ensures a true reflection of the actual oxygen concentration inhaled by the user. Furthermore, it is located upstream of the two-position three-way solenoid valve 303, meaning that regardless of whether the solenoid valve directs oxygen to nasal inhalation or diffusion mode, the sensor monitors the oxygen concentration from the same source. It is responsible for the quality of the "source," not the mode path. The control unit 100 can make more precise adjustments to the mechanical valve 301 based on the feedback data from the oxygen concentration sensor 302.

[0029] The two-position three-way electrically controlled valve 303 uses a low-power solenoid valve as an oxygen inhalation mode switching mechanism. When the control unit provides one level signal, the valve connects the nasal cannula passage to achieve high-concentration, direct personal nasal oxygen supply; when another level signal is provided, the valve connects the diffuse oxygen outlet to release oxygen into a smaller space inside the vehicle (such as the driver's cab), increasing the ambient oxygen concentration and achieving diffuse oxygen supply.

[0030] The status monitoring unit 500 is responsible for monitoring the health status of the oxygen generator itself to ensure safe operation.

[0031] Temperature sensor 501 uses a DS18B20 digital temperature sensor, which is installed near the molecular sieve tower or compressor of the oxygen generator to monitor the operating temperature of the core components.

[0032] The current sensor uses an ACS712 Hall current sensor, which is connected in series in the power supply circuit of the oxygen concentrator compressor to monitor the compressor's operating current in real time and determine whether it is overloaded or has an abnormal no-load condition.

[0033] The communication unit 400 implements the system's "Internet of Things" (IoT) function, supporting remote management and control. The communication unit 400 can employ one or more of the following: a 4G / 5G mobile communication module, a narrowband IoT module, a Wi-Fi module, a Bluetooth module, and a CAN bus interface. Taking the 4G / 5G mobile communication module as an example, the 4G / 5G mobile communication module 401 uses Quectel's EC20 or RM500Q series module as the core of remote communication. This module can upload all status data of the oxygen concentrator (environmental parameters, operating parameters, fault codes) to the cloud server, and can also receive control commands from the cloud server (such as remote power on / off and mode setting). Taking the Bluetooth module as an example, the Bluetooth module 402 uses the HC-05 series module to achieve short-range local connection and control between mobile terminals such as smartphone apps and the oxygen concentrator.

[0034] Power supply unit (not in) Figure 1 (As shown in the image) This unit provides stable and safe onboard power to the entire system. It employs a wide-voltage input (e.g., DC 9-36V) switching power supply module to accommodate voltage fluctuations in the vehicle battery. Protection circuitry is incorporated, integrating overvoltage protection (OVP), overcurrent protection (OCP), low-voltage protection, and reverse connection protection to ensure the system is not damaged by voltage surges or malfunctions under complex electrical conditions such as vehicle start-up and shutdown. Furthermore, the oxygen concentrator can be powered by the vehicle's battery, and the control unit 100 is powered via the vehicle's ACC port.

[0035] Human-computer interaction unit (not in) Figure 1(As shown in the image) It uses a 3.5-inch TFT touchscreen to display real-time information such as altitude, oxygen flow rate, operating mode, and equipment status, and to receive touch commands from users. Remote interactive users or fleet administrators can remotely monitor the operating status of all online vehicle oxygen generators and perform batch management through a computer web interface or mobile APP connected to the cloud server.

[0036] Figure 2 The present invention provides an intelligent control method for an oxygen concentrator, such as... Figure 2 As shown, the working principle and process of this invention are as follows: After the system powers on, the control unit initializes all modules. The environmental sensing unit continuously collects data on altitude (H), atmospheric pressure (P), and oxygen concentration (O2). The control unit executes the built-in control algorithm, the core process of which is as follows: Figure 2 As shown (hypothetical flowchart): Step S201: Read the current altitude H.

[0037] Step S202: Using H as the index, query the "altitude-basic flow rate" mapping table stored in the MCU Flash. For example: an altitude of 2000 meters corresponds to a basic flow rate of 1.0 L / min, 3000 meters corresponds to 1.5 L / min, 4000 meters corresponds to 2.0 L / min, and so on.

[0038] Step S203: Read the current atmospheric pressure P and compare it with the standard atmospheric pressure P_std at this altitude. If P is lower than P_std (e.g., in severe weather), positive compensation is applied to the base flow rate; if P is higher than P_std, negative compensation is applied. Finally, the target oxygen flow rate Q_target is calculated. During this process, the value of P_std is determined according to standard GB / T 35414-2017 Requirements for Indoor Space Diffuse Oxygen Supply (Oxygen Regulation) in Plateau Areas.

[0039] Step S204: The control unit sends a command to the mechanical air valve (stepper motor) to adjust the current oxygen flow rate to Q_target.

[0040] Step S205: Simultaneously, based on the mode (nasal inhalation / diffusion) set by the user via the touchscreen or APP, control the two-position three-way electric control valve to switch to the corresponding air path.

[0041] Throughout the process, the status monitoring unit operates continuously. If the control unit detects through the current sensor that the compressor current continuously exceeds the safety threshold, or if the temperature sensor reading exceeds 85°C within a specified time, it immediately determines a fault and executes a safety strategy: displaying a red alarm on the touchscreen and APP, and automatically cutting off the power supply to the oxygen concentrator to prevent equipment damage.

[0042] Example 2 Building upon Example 1, this example optimizes the control algorithm. The algorithm model not only relies on table lookup but also introduces a dynamic adjustment mechanism based on fuzzy PID control. The microcontroller uses the deviation between the target flow rate and the actual flow rate (which can be fed back from an additional flow meter), the rate of change of the deviation, and the difference between atmospheric pressure and the standard value as inputs to the fuzzy control. Through fuzzy inference and defuzzification, it calculates the optimal control quantity for the mechanical valve in real time. This approach makes oxygen flow regulation smoother and faster, better adapting to the frequent and rapid changes in altitude encountered by vehicles on winding mountain roads.

[0043] The intelligent control system for a high-altitude vehicle-mounted oxygen concentrator provided by this invention includes: a control unit, based on an integrated circuit; an oxygen supply execution unit, including a mechanical valve for controlling oxygen flow and a two-position three-way electrically controlled valve for switching between nasal inhalation and diffusion modes; an environmental sensing unit, integrating an air sensor, an atmospheric pressure sensor, and a BeiDou navigation and positioning signal receiver, for collecting oxygen concentration, atmospheric pressure, and altitude data; a status monitoring unit for collecting the operating status of the oxygen concentrator; a communication unit supporting local and remote communication; and a safe power supply unit. This invention, through multi-sensor data fusion, analyzes and precisely controls oxygen flow in real time based on a built-in algorithm, adapting to different altitude environments. It also achieves intelligent mode switching, safe monitoring of operating status, and remote management of the oxygen concentrator, significantly improving oxygen supply efficiency, safety, and user experience during high-altitude driving.

[0044] It should be noted that the technical features in the above embodiments can be combined arbitrarily, and the resulting technical solutions all fall within the protection scope of this application. Furthermore, in this document, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smart control system for a high-altitude vehicle-mounted oxygen generator, characterized in that, include: The control unit uses integrated circuits as the carrier of the control firmware; An oxygen supply execution unit is electrically connected to the control unit. The oxygen supply execution unit includes a mechanical valve for adjusting the oxygen output flow rate and a two-position three-way electrically controlled valve for switching between nasal inhalation and diffusion oxygen inhalation modes. An environmental sensing unit, which is communicatively connected to the control unit, is used to collect real-time parameters of the environment in which the oxygen generator is located; the environmental sensing unit includes at least an oxygen concentration sensor for detecting oxygen concentration, a carbon dioxide concentration sensor for detecting carbon dioxide concentration, an atmospheric pressure sensor for detecting atmospheric pressure, and a Beidou navigation and positioning signal receiver for detecting altitude. A status monitoring unit, which is communicatively connected to the control unit, is used to collect the operating status parameters of the oxygen generator itself. A communication unit, integrated or connected to the control unit, is used to receive local and remote oxygen generator control commands and upload oxygen generator status data. The power supply unit is electrically connected to the control unit, oxygen supply execution unit, environmental sensing unit, status monitoring unit, and communication unit, and is used to provide safe and reliable on-board power to the system.

2. The intelligent control system for the plateau vehicle-mounted oxygen generator according to claim 1, characterized in that, The control unit is configured to receive real-time parameters collected by the environmental sensing unit, and based on these parameters, perform analysis and decision-making through a built-in algorithm, issue control commands to the oxygen supply execution unit, and adjust the opening of the mechanical valve in real time to adapt to the oxygen flow requirements at different altitudes.

3. The intelligent control system for the plateau vehicle-mounted oxygen generator according to claim 1, characterized in that, The status monitoring unit includes at least one of a temperature sensor for monitoring the internal temperature of the oxygen generator, a current sensor for monitoring the operating status of the compressor, or a vibration sensor.

4. The intelligent control system for the plateau vehicle-mounted oxygen generator according to claim 1, characterized in that, The communication unit includes at least one of the following: a 4G / 5G mobile communication module, a narrowband IoT module, a Wi-Fi module, a Bluetooth module, and a CAN bus interface.

5. The intelligent control system for the plateau vehicle-mounted oxygen generator according to claim 1, characterized in that, The power supply unit includes an on-board power conversion module, an overvoltage protection circuit, an overcurrent protection circuit, a power loss protection circuit, and a reverse connection protection circuit.

6. The intelligent control system for the high-altitude vehicle-mounted oxygen generator according to any one of claims 1 to 5, characterized in that, The system also includes a human-machine interaction unit connected to the control unit, used to display the working status of the oxygen concentrator, environmental parameters, and receive local control commands from the user; the human-machine interaction unit is a combination of a touch screen, physical buttons and indicator lights, or a mobile terminal APP.

7. A method for intelligent control of an oxygen generator based on the system described in any one of claims 1 to 6, characterized in that, Includes the following steps: The oxygen concentration, atmospheric pressure, and altitude data of the environment in which the oxygen generator is located are collected in real time through the environmental sensing unit. The oxygen generator's operating status data is collected in real time through the status monitoring unit; The control unit receives the environmental data and status data, and uses the altitude, atmospheric pressure and oxygen concentration data as inputs to calculate the current optimal target oxygen flow rate value through a preset algorithm model. The control unit compares the current oxygen flow rate with the target oxygen flow rate value and generates a control command to drive the mechanical valve to adjust the oxygen flow rate to the target value. At the same time, according to the oxygen inhalation mode command selected by the user, the control unit drives the two-position three-way electric control valve to switch to the corresponding nasal inhalation or diffusion oxygen supply path; The oxygen generator's operating status data and environmental data are uploaded to the remote monitoring platform via the communication unit, and control commands from local or remote sources are received.

8. The method according to claim 7, characterized in that, The step of "calculating the current optimal target oxygen flow rate using a preset algorithm model" specifically includes: Using altitude as the main control variable, the basic oxygen flow rate setting value is obtained by querying the preset "altitude-oxygen flow rate" mapping table; Using atmospheric pressure and / or ambient oxygen concentration as compensation variables, the baseline oxygen flow rate setting is corrected to obtain the final target oxygen flow rate value.

9. The method according to claim 7, characterized in that, It also includes safety control steps: The control unit continuously monitors the data from the status monitoring unit; When any of the following conditions are detected: the internal temperature of the oxygen concentrator exceeds the safety threshold, the compressor operating current is abnormal, or the vibration amplitude exceeds the limit, a fault state is determined, and a safety strategy is executed. The safety strategy includes: issuing an alarm, reducing the operating power of the oxygen concentrator, or cutting off the power supply to the oxygen concentrator.

Images