Constant-temperature, constant-oxygen and constant-pressure control method, control system and related equipment

Abstract

The invention discloses a control method, a control system and related equipment for constant temperature, constant oxygen and constant pressure. The control method comprises the following steps: acquiring temperature data, oxygen concentration data and pressure data in a cabin body in which an oxygen cabin mainboard is positioned; determining a current working stage according to the pressure data and a preset target pressure value; in the boosting stage, the opening degree of an air inlet valve of a control cabin, the rotating speed of an air compressor and the oxygen production amount of an oxygen generator are synchronously increased; in the pressure stabilizing stage, at least two of the opening degree of an exhaust valve, the opening degree of an air inlet valve, the rotating speed of an air compressor, the oxygen production amount of an oxygen generator and the temperature adjusting capacity of an air conditioner of the cabin are adjusted at the same time according to the temperature data, the oxygen concentration data and the pressure data; if so, controlling the oxygen generator to be closed, and controlling the opening degree of the exhaust valve and the rotating speed of the air compressor to synchronously change. According to the invention, higher-precision pressure control, oxygen concentration control and temperature control can be realized, and the stability of pressure, oxygen concentration and temperature is ensured.

Description

Technical Field

[0001] This application relates to the field of micro hyperbaric oxygen chamber technology, specifically to a control method, control system, and related equipment for constant temperature, constant oxygen, and constant pressure. Background Technology

[0002] A hyperbaric oxygen chamber is a health device that utilizes a pressure environment higher than atmospheric pressure, combined with the inhalation of high-concentration oxygen, to enhance the body's blood oxygen content and tissue oxygen supply capacity. To ensure the safety and effectiveness of oxygen therapy, the chamber needs to precisely control key environmental parameters such as pressure, oxygen concentration, and temperature, and maintain the stability of these parameters throughout the entire oxygen therapy process (including the pressurization, stabilization, and depressurization phases).

[0003] In related technologies, micro hyperbaric oxygen chambers typically adopt a modular control architecture, dividing pressure control, oxygen concentration control, and temperature control into three relatively independent subsystems. This causes fluctuations in pressure, oxygen concentration, and temperature due to mutual influence, and the control lag of the corresponding subsystems exacerbates these fluctuations, making it impossible to guarantee the stability of these environmental parameters. Summary of the Invention

[0004] This application provides a control method, control system, and related equipment for constant temperature, constant oxygen, and constant pressure, aiming to achieve higher precision pressure control, oxygen concentration control, and temperature control, and to ensure the stability of pressure, oxygen concentration, and temperature.

[0005] Firstly, this application provides a control method for constant temperature, constant oxygen, and constant pressure, applied to a control system including an oxygen chamber mainboard and an external unit board. The control method for constant temperature, constant oxygen, and constant pressure includes: Collect temperature data, oxygen concentration data, and pressure data within the chamber where the oxygen chamber's mainboard is located; Based on the pressure data and the preset target pressure value, the current working stage is determined, which includes a pressure increase stage, a pressure stabilization stage, and a pressure decrease stage. If the current working stage is the pressurization stage, the oxygen chamber main board sends a first control command to the external unit board. The first control command is used to control the opening of the air intake valve of the chamber, the speed of the air compressor, and the oxygen production of the oxygen generator to increase synchronously. If the current working stage is the pressure stabilization stage, based on the temperature data, the oxygen concentration data, and the pressure data, the oxygen chamber main board sends a second control command to the outdoor unit board. The second control command is used to simultaneously adjust at least two of the following: the opening of the chamber's exhaust valve, the opening of the intake valve, the air compressor speed, the oxygen generator's oxygen output, and the air conditioner's temperature regulation capability. If the current working stage is the depressurization stage, the oxygen chamber main board sends a third control command to the outdoor unit board. The third control command is used to control the oxygen generator to shut down, and to control the opening of the exhaust valve and the air compressor speed to change synchronously. The opening of the exhaust valve changes in an increasing trend, and the air compressor speed changes in a decreasing trend.

[0006] In the above embodiments, a multi-parameter linkage collaborative control scheme was established. By integrating and intelligently coordinating the previously independently controlled execution units such as air intake, exhaust, air compressor, and oxygen generator during the pressurization, stabilization, and depressurization stages of the hyperbaric oxygen chamber operation, this scheme achieves higher precision, higher efficiency, and higher safety in the control of a constant temperature, oxygen, and pressure environment, significantly improving the overall performance and user experience of the micro hyperbaric oxygen chamber.

[0007] In conjunction with some embodiments of the first aspect, in some embodiments, the first control command is used for: The intake valve opening is controlled to increase from a preset initial value to a first target opening at a first preset rate; the air compressor speed is controlled to increase synchronously from a preset initial value to a first target speed; and the pulse width modulation duty cycle of the oxygen generator is controlled to increase synchronously from a preset initial value to a first target duty cycle. After sending the first control command from the oxygen chamber mainboard to the external unit board, the method further includes: The rate of pressure rise is detected by measuring the pressure data within the chamber. If the pressure rise rate is detected to exceed the preset pressure rise rate threshold, the oxygen chamber mainboard sends a command to the external unit board to reduce the opening of the intake valve and reduce the speed of the air compressor.

[0008] In the above embodiments, the proposed dual-linkage control strategy for the pressurization stage achieves precise and smooth control of the pressure curve through the synchronous and coordinated growth of three parameters: the intake valve, the air compressor, and the oxygen generator, as well as the dual-parameter negative feedback adjustment mechanism of the pressure rise rate and the speed of the intake valve and the air compressor. This fundamentally ensures the safety and comfort of the user throughout the entire pressurization process.

[0009] In conjunction with some embodiments of the first aspect, in some embodiments, the step of sending a second control command from the oxygen chamber mainboard to the external unit board based on the temperature data, the oxygen concentration data, and the pressure data includes: The pressure deviation between the pressure data and the set pressure during the pressure stabilization phase is obtained; If the pressure deviation is not within the preset pressure difference range, the oxygen chamber main board sends the second control command to the outdoor unit board to simultaneously adjust the exhaust valve opening and the air compressor speed, or simultaneously adjust the intake valve opening and the air compressor speed.

[0010] In the above embodiments, a "source-load" coordinated linkage regulation strategy is proposed to address pressure fluctuations during the pressure stabilization phase. This strategy involves synchronously adjusting the valve (load) that controls the pressure output and the air compressor (source) that controls the pressure input in the opposite or same direction. This significantly improves the dynamic response speed and steady-state accuracy of pressure control, while also taking into account system energy efficiency and ensuring the continuous stability of the high-pressure environment.

[0011] In conjunction with some embodiments of the first aspect, in some embodiments, the temperature data, the oxygen concentration data, and the pressure data are used to send a second control command from the oxygen chamber mainboard to the external unit board, further comprising: Obtain the oxygen concentration deviation between the oxygen concentration data and the set oxygen concentration during the pressure stabilization phase; If the oxygen concentration deviation is not within the preset concentration difference range, the oxygen chamber main board sends the second control command to the outdoor unit board to adjust the oxygen production capacity of the oxygen generator and maintain the air compressor speed unchanged.

[0012] In the above embodiments, by actively locking and maintaining the air compressor speed unchanged while adjusting the oxygen production of the oxygen generator, the oxygen concentration control loop and the pressure control loop are separated, eliminating the coupling interference between the two and ensuring that the cabin pressure environment remains highly stable when correcting oxygen concentration deviations.

[0013] In conjunction with some embodiments of the first aspect, in some embodiments, the control method for constant temperature, constant oxygen, and constant pressure further includes: The brain oxygen saturation of the target object inside the oxygen chamber where the mainboard of the oxygen chamber is located is collected. The brain oxygen saturation is used to determine the adjustment range when adjusting the oxygen production mechanism.

[0014] In the above embodiments, the combination of cabin environment control with the user's core physiological indicators has achieved a leap from "controlling the environment" to "ensuring individual physiological needs". This not only greatly improves the personalization, precision and safety of oxygen therapy, but also responds more efficiently to individual differences and emergencies, ensuring that every user can obtain the best oxygen therapy effect.

[0015] In conjunction with some embodiments of the first aspect, in some embodiments, the third control command is used to control the opening degree of the exhaust valve to increase to the second target opening degree, and simultaneously reduce the air compressor speed to a preset idle speed; After sending the third control command from the oxygen chamber mainboard to the external unit board, the method further includes: The rate of pressure drop within the chamber was detected; If the pressure drop rate is detected to exceed the preset pressure drop rate threshold, the oxygen chamber mainboard sends a command to the external unit board to reduce the opening of the exhaust valve.

[0016] In the above embodiments, the comfort problem during the pressure reduction process is innovatively solved by the coordinated action of the exhaust valve and the air compressor in "large exhaust and small replenishment". Secondly, by introducing a closed-loop negative feedback mechanism based on the pressure drop rate, the exhaust valve is dynamically fine-tuned, thereby realizing flexible and safe control of the pressure reduction process.

[0017] In some embodiments of the first aspect, the first control command is used to control the opening degree of the intake valve, the speed of the air compressor, the oxygen production of the oxygen generator, and the intensity of the negative ion generator to increase synchronously. The control method for constant temperature, constant oxygen, and constant pressure also includes: The concentration of negative oxygen ions in the chamber where the mainboard of the oxygen chamber is located is collected. The second control command is also used to adjust the intensity of the negative oxygen ion generator according to the concentration of negative oxygen ions.

[0018] In the above embodiments, the negative ion generator is started synchronously with core equipment such as pressurization and oxygen production, achieving a synergistic improvement in the quality of the cabin environment from the initial stage. Secondly, a closed-loop feedback control of the negative ion concentration is introduced, and the generator intensity is dynamically and precisely adjusted during the pressure stabilization phase, providing users with a constant, fresh, and comfortable cabin microenvironment.

[0019] In a second aspect, embodiments of this application provide a control system including an oxygen chamber main board and an external unit board, for executing the method described in any possible implementation of the first aspect.

[0020] Thirdly, embodiments of this application provide a control device comprising: one or more processors and a memory; the memory is coupled to the one or more processors and is used to store computer program code, the computer program code including computer instructions, wherein the one or more processors invoke the computer instructions to cause the control device to perform the method described in the first aspect and any possible implementation thereof.

[0021] Fourthly, embodiments of this application provide a computer program product containing instructions that, when the computer program product is run on a control system, cause the control system to perform the method described in the first aspect and any possible implementation thereof.

[0022] Fifthly, embodiments of this application provide a computer-readable storage medium including instructions that, when executed on a control system, cause the control system to perform the method described in the first aspect and any possible implementation thereof.

[0023] Understandably, the control system provided in the second aspect, the control device provided in the third aspect, the computer program product provided in the fourth aspect, and the computer storage medium provided in the fifth aspect are all used to execute the method provided in the embodiments of this application. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects in the corresponding methods, and will not be repeated here.

[0024] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: through multi-parameter linkage and coordinated control, the independent control of multiple execution units such as air intake, exhaust, air compressor, and oxygen generator is integrated and intelligently coordinated to control the pressurization, stabilization, and depressurization stages of the oxygen chamber operation, thereby achieving higher precision, higher efficiency, and higher safety of constant temperature, constant oxygen, and constant pressure environment control, and improving the overall performance and user experience of the micro hyperbaric oxygen chamber. Attached Figure Description

[0025] Figure 1 This is a flowchart illustrating a control method for constant temperature, constant oxygen, and constant pressure in an embodiment of this application. Figure 2 This is a schematic diagram of the hardware modules of the control system in an embodiment of this application; Figure 3 This is a schematic diagram of the software control of the control system in the embodiments of this application; Figure 4 This is a schematic diagram of the control system in the embodiments of this application; Figure 5 This is a schematic diagram of at least a portion of the physical structure of the control device in the embodiments of this application. Detailed Implementation

[0026] The terminology used in the following embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification of this application, the singular expressions “a,” “an,” “the,” “the,” and “this” are intended to include the plural expressions as well, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this application refers to any or all possible combinations including one or more of the listed items.

[0027] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0028] Hyperbaric oxygen chambers improve oxygen supply to human tissues by delivering high concentrations of oxygen into a sealed chamber and maintaining a specific pressure. They are widely used in stroke rehabilitation, sports injury repair, and altitude sickness prevention. However, related technologies have the following drawbacks: (1) The accuracy of the three constant parameters (constant temperature, constant oxygen and constant pressure) is insufficient: the temperature and humidity fluctuation range is generally greater than ±2℃, ±10%RH (Relative Humidity), the oxygen concentration deviation is greater than ±3%, and the pressure fluctuation is greater than ±0.01MPa. This cannot meet the requirements of high-precision oxygen therapy, which may affect the treatment effect or cause user discomfort. (2) Poor parameter linkage: Pressure regulation and oxygen concentration control, and air compressor operation are independent and separate. For example, oxygen output is not matched synchronously when the pressure is increased, resulting in a sudden drop in oxygen concentration; the air speed is not linked when the temperature is adjusted, resulting in a lag in temperature response. (3) Incomplete monitoring dimensions: Only basic parameters such as temperature, humidity, oxygen and pressure are monitored. There is a lack of monitoring of negative oxygen ion concentration (which affects the air purification effect in the cabin) and brain oxygen saturation (which is related to the user's physiological oxygen supply status), so it is impossible to achieve "environment-physiology" closed-loop control.

[0029] In response, this application provides a control method, control system, and related equipment for constant temperature, constant oxygen, and constant pressure micro hyperbaric oxygen chambers, achieving high-precision, strong linkage, full monitoring, and high-safety three-constant control, with the following advantages: (1) Achieve high-precision control of three constant parameters: temperature and humidity control accuracy ≤ ±0.5℃, ±5% RH, oxygen concentration control accuracy ≤ ±1% (range 21%~90% VOL), pressure control accuracy ≤ ±0.005MPa (range 0.12~0.3MPa). (2) Establish multi-parameter linkage control logic: realize coordinated adjustment of "pressure-oxygen concentration-air compressor speed" and "temperature and humidity-air conditioning fan speed"; (3) Complete monitoring dimensions: integrate negative oxygen ion monitoring and brain oxygen Bluetooth communication to achieve full-dimensional monitoring of "environmental parameters + physiological parameters" and support personalized oxygen therapy plan adjustment.

[0030] The following describes the flow chart of the control method for constant temperature, oxygen, and pressure provided in this embodiment. This control method is applied to the control system including the oxygen chamber mainboard and the outdoor unit board. Please refer to... Figure 1 This is a flowchart illustrating a control method for constant temperature, constant oxygen, and constant pressure in an embodiment of this application.

[0031] S101. Collect temperature data, oxygen concentration data, and pressure data inside the oxygen chamber where the mainboard is located.

[0032] In the embodiments of this application, the chamber of the micro hyperbaric oxygen chamber is equipped with a temperature and humidity sensor, an oxygen sensor, and a differential pressure sensor, which are respectively connected to the main board of the micro hyperbaric oxygen chamber and report data in real time.

[0033] In some embodiments of this application, temperature data refers to the Celsius temperature of the air inside the chamber, collected by a temperature and humidity sensor with an accuracy of ±0.1°C. Oxygen concentration data refers to the volume percentage (VOL) of oxygen in the air inside the chamber, collected by an electrochemical oxygen sensor with a range of 0-100% and an accuracy of ±1%. Pressure data refers to the pressure difference between the inside and outside of the chamber, collected by a differential pressure sensor and converted into the absolute pressure value inside the chamber by the oxygen chamber's mainboard. For example, the absolute pressure inside the chamber is equal to the external standard atmospheric pressure plus the pressure difference measured by the sensor. This design ensures the accuracy of pressure monitoring.

[0034] S102. Based on the pressure data and the preset target pressure value, determine the current working stage, which includes the pressure increase stage, the pressure stabilization stage, and the pressure decrease stage.

[0035] In the embodiments of this application, the complete operation process of the hyperbaric oxygen chamber is divided into three working stages. The preset target pressure value is the chamber's target pressure pre-set according to the oxygen therapy plan, for example, 0.2 MPa. The logic for determining the working stages is as follows: when the actual pressure inside the chamber is lower than the target pressure value minus a threshold, it is determined to be the pressure-increasing stage; when the actual pressure inside the chamber is within an allowable fluctuation range of the target pressure value, it is determined to be the pressure-stabilizing stage; and when an end command is received or the preset treatment course is completed, it is determined to be the pressure-depressing stage. This stage division makes the control logic clear and facilitates the adoption of optimal control strategies for different stages.

[0036] S103. If the current working stage is the pressurization stage, the oxygen chamber main board sends the first control command to the external unit board. The first control command is used to control the opening of the air intake valve of the chamber, the speed of the air compressor, and the oxygen production of the oxygen generator to increase synchronously.

[0037] In the embodiments of this application, the oxygen chamber mainboard controls the intake valve, air compressor, and oxygen generator connected to the external unit board to work in coordination. The intake valve opening refers to the percentage of the valve that controls the entry of fresh air into the chamber, controlled by a PWM (Pulse Width Modulation) signal, ranging from 0% to 100%. The air compressor speed refers to the motor rotation speed (rpm, Revolutions Per Minute) of the oil-free silent air compressor, which is positively correlated with the exhaust volume and controlled by a frequency converter. The oxygen generator's oxygen production capacity refers to the volume of high-concentration oxygen produced per unit time by the PSA (Pressure Swing Adsorption) oxygen generator, typically measured in L / min (liters per minute), and its output is also adjusted by controlling the duty cycle via a PWM signal. Synchronous increase means that these three parameters increase together from their initial values ​​according to a preset control curve or rate at startup, rather than starting independently.

[0038] S104. If the current working stage is the pressure stabilization stage, based on the temperature data, oxygen concentration data, and pressure data, the oxygen chamber main board sends a second control command to the outdoor unit board. The second control command is used to simultaneously adjust at least two of the following: the opening degree of the chamber's exhaust valve, the opening degree of the intake valve, the air compressor speed, the oxygen production capacity of the oxygen generator, and the temperature regulation capacity of the air conditioner.

[0039] In the embodiments of this application, pressure, oxygen, and temperature need to be finely regulated. The exhaust valve opening degree refers to the percentage of the valve that controls the discharge of exhaust gas from the cabin. The temperature regulation capability of the air conditioner refers to the cooling or heating power, airflow speed, etc., of the air conditioner (DC inverter air conditioner).

[0040] S105. If the current working stage is the depressurization stage, the oxygen chamber main board sends a third control command to the outdoor unit board. The third control command is used to control the oxygen generator to shut down, and to control the opening of the exhaust valve and the air compressor speed to change synchronously. The trend of the exhaust valve opening is an increasing trend, and the trend of the air compressor speed is a decreasing trend.

[0041] In the embodiments of this application, the cabin pressure is systematically reduced to atmospheric pressure. Synchronous change means that the opening degree of the exhaust valve and the speed of the air compressor are adjusted together according to a preset pressure reduction logic. Specifically, the opening degree of the exhaust valve increases to expel high-pressure gas from the cabin. The speed of the air compressor decreases, but does not drop directly to 0.

[0042] As can be seen, the embodiments of this application establish a multi-parameter linkage collaborative control scheme. By integrating and intelligently coordinating the previously independently controlled execution units such as air intake, exhaust, air compressor, and oxygen generator during the pressurization, stabilization, and depressurization stages of the hyperbaric oxygen chamber operation, this scheme achieves higher precision, higher efficiency, and higher safety in the control of a constant temperature, oxygen, and pressure environment, significantly improving the overall performance and user experience of the micro hyperbaric oxygen chamber.

[0043] In some embodiments of this application, the first control command is used to: control the opening of the intake valve to increase from a preset initial opening value to a first target opening value at a first preset rate, control the speed of the air compressor to increase synchronously from a preset initial speed value to a first target speed, and control the pulse width modulation duty cycle of the oxygen generator to increase synchronously from a preset initial duty cycle value to a first target duty cycle.

[0044] Specifically, the pressurization phase employs a multi-parameter synchronous startup strategy. The preset initial values ​​for opening degree, engine speed, and duty cycle are typically all zero, indicating that the equipment starts from a standstill. The first preset rate is a slope value that defines the speed at which the parameters increase over time, ensuring a smooth startup process rather than abrupt changes. "Synchronous increase" means that the three parameters start at the same time and change collaboratively according to their respective set growth curves until they reach their target values. The first target opening degree is the stable opening degree that the intake valve should reach at the end of the pressurization phase. The first target engine speed is the stable engine speed that the air compressor should reach at the end of the pressurization phase. The first target duty cycle is the stable duty cycle that the pulse width modulation signal of the oxygen generator should reach at the end of the pressurization phase. These three target values ​​are the optimal combination obtained through model calculations or experimental calibration based on the chamber volume, target pressure, and pressurization time requirements.

[0045] In some embodiments of this application, during the pressurization phase, to achieve the goal of smoothly increasing the cabin pressure from atmospheric pressure to 0.2 MPa within approximately 10 minutes, the first target opening degree is set to 50%, the first target rotation speed is set to 2000 rpm, and the first target duty cycle is set to 80%. These three parameters increase synchronously from 0 to the target value according to a linear function. This coordinated start-up strategy, by precisely matching the intake air volume and oxygen production volume, ensures from the source that the oxygen concentration inside the cabin is not excessively diluted due to the rapid influx of fresh air during pressurization, ensuring that the user remains in an oxygen-rich environment throughout the process.

[0046] After sending the first control command from the oxygen chamber mainboard to the outdoor unit board, the process also includes: S201, Detect the rate of pressure rise of the pressure data inside the chamber; In the embodiments of this application, the pressure rise rate refers to the increment of pressure data per unit time, typically expressed in MPa / min. The oxygen chamber mainboard collects pressure data at a high frequency (e.g., 10 times per second) and calculates the current pressure rise rate in real time using a differential algorithm. This step is a prerequisite for achieving closed-loop feedback control, thereby dynamically sensing and responding to state changes during the pressurization process.

[0047] S202. If the pressure rise rate is detected to exceed the preset pressure rise rate threshold, the oxygen chamber main board sends a command to the external unit board to reduce the opening of the intake valve and reduce the speed of the air compressor.

[0048] In the embodiments of this application, negative feedback regulation can be performed when the pressure rises too quickly. The preset pressure rise rate threshold is a safety upper limit set to prevent user discomfort (such as drastic changes in ear pressure) caused by excessively rapid pressure rise. Reducing the intake valve opening and reducing the air compressor speed are performed simultaneously. This means that the pressure is not limited solely by "throttling" (closing the valve), but also by "reducing the power source" (reducing the air compressor power).

[0049] In some embodiments of this application, the preset pressure rise rate threshold is set to 0.02 MPa / min. Once the actual rate is detected to exceed this value, the oxygen chamber mainboard immediately sends a command to reduce the intake valve opening by 10% (e.g., from the current 40% to 36%), and simultaneously reduce the air compressor speed by 200 rpm (e.g., from the current 1800 rpm to 1600 rpm). This dual-path coordinated regulation design of "valve-air source" provides a faster response and more significant regulation effect compared to the single-path control method that only regulates the valve. It can more effectively suppress pressure overshoot and ensure that the pressure curve always remains smooth, thereby providing users with a safe and comfortable pressurization experience.

[0050] As can be seen, the dual linkage control strategy for the pressurization stage proposed in this application achieves precise and smooth control of the pressure curve through the synchronous and coordinated growth of three parameters: the intake valve, the air compressor, and the oxygen generator, as well as the dual-parameter negative feedback adjustment mechanism of the pressure rise rate and the speed of the intake valve and the air compressor. This fundamentally ensures the safety and comfort of the user throughout the pressurization process.

[0051] In some embodiments of this application, based on temperature data, oxygen concentration data, and pressure data, a second control command is sent from the oxygen chamber mainboard to the outdoor unit board, including: S301. Obtain the pressure deviation between the pressure data and the set pressure during the pressure stabilization phase; In the embodiments of this application, during the pressure stabilization phase, it is necessary to compare the actual pressure with the set pressure in real time. The set pressure is a target constant pressure value that needs to be maintained during the pressure stabilization phase, preset according to a specific oxygen therapy plan, and is the core benchmark of the pressure control system. The pressure deviation is a quantitative result obtained by the oxygen chamber mainboard by calculating the difference between the currently collected real-time pressure data and the set pressure. This deviation value has a positive and negative sign; a positive value indicates that the current pressure exceeds the set pressure (i.e., overpressure), and a negative value indicates that the current pressure is lower than the set pressure (i.e., underpressure).

[0052] S302. If the pressure deviation is not within the preset pressure difference range, the oxygen chamber main board sends a second control command to the external unit board to simultaneously adjust the exhaust valve opening and the air compressor speed, or simultaneously adjust the intake valve opening and the air compressor speed.

[0053] In the embodiments of this application, the preset differential pressure range is a "dead zone" or "insensitive zone" centered on a set pressure, within which pressure is allowed to fluctuate harmlessly. The existence of this range is to prevent the control system from frequently starting and stopping adjustment actions due to extremely small and insignificant pressure fluctuations, thereby avoiding mechanical wear of the actuator and increased system energy consumption, and ensuring the stability and robustness of the system.

[0054] In some embodiments of this application, the preset differential pressure range is set to [-0.005 MPa, +0.005 MPa]. Only when the absolute value of the pressure deviation is greater than 0.005 MPa, i.e., the pressure deviation exceeds this range, can the control system determine that there is a pressure instability that needs to be corrected, and can trigger a second control command. When the pressure deviation is positive and exceeds the preset differential pressure range (i.e., overpressure), the opening of the exhaust valve and the speed of the air compressor can be adjusted simultaneously. The adjustment here is a coordinated reverse operation: increasing the opening of the exhaust valve to increase the gas discharge, while decreasing the speed of the air compressor to reduce the fresh gas supply.

[0055] In some embodiments of this application, the adjustment amount is directly proportional to the magnitude of the pressure deviation. For example, if the pressure deviation is +0.006 MPa, the exhaust valve opening increases by 20%, and the air compressor speed decreases by 100 rpm; if the pressure deviation increases to +0.01 MPa, the exhaust valve opening increases by 40%, and the air compressor speed decreases by 200 rpm. This linkage adjustment mechanism, which is positively correlated with the degree of deviation, achieves a faster return of pressure to the target range by simultaneously "increasing discharge" and "reducing intake," compared to simply opening the exhaust valve. It also avoids energy waste caused by continuous high-power intake, thus achieving a balance between rapid response and energy saving.

[0056] When the pressure deviation is negative and exceeds the preset pressure difference range (i.e., underpressure), the intake valve opening and the air compressor speed can be adjusted simultaneously. This adjustment is a synergistic positive operation: increasing the intake valve opening to widen the intake passage, while simultaneously increasing the air compressor speed to enhance the air source power.

[0057] In some embodiments of this application, the adjustment amount is also proportional to the absolute value of the pressure deviation. For example, if the pressure deviation is -0.006 MPa, increasing the intake valve opening by 10% increases the air compressor speed by 100 rpm. This dual-path positive compensation strategy of "valve-air source" can increase the pressure recovery speed by about 40% compared to a single adjustment method, ensuring the continuous stability of the high-pressure environment inside the chamber, thereby guaranteeing the continuity and effectiveness of oxygen therapy.

[0058] As can be seen, this application proposes a "source-load" coordinated linkage regulation strategy for pressure fluctuations during the pressure stabilization phase. The valve (load) that controls the pressure output and the air compressor (source) that controls the pressure input are synchronously adjusted in opposite or the same direction. This significantly improves the dynamic response speed and steady-state accuracy of pressure control, while also taking into account system energy efficiency and ensuring the continuous stability of the high-pressure environment.

[0059] In some embodiments of this application, temperature data, oxygen concentration data, and pressure data are used to send a second control command from the oxygen chamber mainboard to the outdoor unit board, and the method further includes: S401. Obtain the oxygen concentration deviation between the oxygen concentration data and the set oxygen concentration during the pressure stabilization phase; In the embodiments of this application, the set oxygen concentration is a target oxygen concentration value that needs to be maintained during the pressure stabilization phase, predetermined in the oxygen therapy plan, such as 30% VOL. The oxygen concentration deviation is the difference calculated by the oxygen chamber's mainboard by comparing the real-time collected oxygen concentration data with the set oxygen concentration. The oxygen concentration deviation also has a positive and negative sign; a positive value indicates that the current oxygen concentration is too high, and a negative value indicates that the current oxygen concentration is too low.

[0060] S402. If the oxygen concentration deviation is not within the preset concentration difference range, the oxygen chamber main board sends a second control command to the outdoor unit board to adjust the oxygen production of the oxygen generator and maintain the air compressor speed unchanged.

[0061] In the embodiments of this application, the preset concentration difference range is an allowable fluctuation range around the set oxygen concentration, i.e., a control "dead zone". Its function is to avoid overreacting to minor fluctuations in oxygen concentration caused by factors such as sensor noise or human respiration, which do not affect the overall oxygen therapy effect.

[0062] In some embodiments of this application, the preset concentration difference range is set to [-1%, +1%]. This means that the adjustment program will only be activated when the absolute value of the oxygen concentration deviation is greater than 1%, ensuring the necessity and efficiency of the control action. Adjusting the oxygen production of the oxygen generator refers to increasing or decreasing the oxygen production of the oxygen generator according to the sign of the oxygen concentration deviation. If the oxygen concentration deviation is negative (concentration is too low), the pulse width modulation duty cycle of the oxygen generator is increased to increase the oxygen production; if the oxygen concentration deviation is positive (concentration is too high), the pulse width modulation duty cycle is decreased to reduce the oxygen production. The magnitude of the adjustment can be achieved using a PID (Proportional-Integral-Derivative) control algorithm to obtain a faster response speed and a smaller steady-state error.

[0063] Maintaining a constant air compressor speed is a key decoupling control strategy in this application's embodiments. The air compressor is the primary power source for maintaining the total pressure within the chamber, and its speed directly affects the total air intake. When only the oxygen concentration needs adjustment, actively maintaining a constant air compressor speed ensures that the total gas flow within the chamber remains essentially constant. For example, regardless of how the oxygen generator's output is adjusted, the control value for the air compressor speed in the instructions sent from the oxygen chamber's mainboard to the external unit board always remains at the value before oxygen concentration adjustment. This design separates oxygen concentration control from pressure control, avoiding potential fluctuations in total pressure caused by adjusting the oxygen generator (changing the oxygen ratio in the mixed gas), and solving the problem of mutual interference between oxygen and pressure regulation. This strategy ensures that while improving the oxygen quality within the chamber, the stability of the high-pressure environment remains unaffected.

[0064] As can be seen, the embodiments of this application actively lock and maintain the air compressor speed at a constant speed while adjusting the oxygen production of the oxygen generator, thereby separating the oxygen concentration control loop from the pressure control loop, eliminating the coupling interference between the two, and ensuring that the cabin pressure environment remains highly stable when correcting oxygen concentration deviations.

[0065] In some embodiments of this application, the control method for constant temperature, constant oxygen, and constant pressure further includes: S501. Collect the brain oxygen saturation of the target object inside the oxygen chamber where the mainboard of the oxygen chamber is located. The brain oxygen saturation is used to determine the adjustment range when adjusting the oxygen production mechanism.

[0066] In the embodiments of this application, the chamber housing the oxygen chamber's mainboard can integrate external physiological monitoring equipment. The target audience is users currently using a micro-hyperbaric oxygen chamber. Regional oxygen saturation (rSO2) refers to the percentage of oxyhemoglobin in a local brain tissue relative to total hemoglobin, and is a key physiological indicator reflecting the balance of oxygen supply and demand in brain tissue.

[0067] In some embodiments of the present application, the acquisition of cerebral oxygen saturation is achieved by a non-invasive cerebral oxygen saturation monitor worn on the user's forehead. This monitor uses near-infrared spectroscopy (NIRS) for measurement and wirelessly transmits real-time data to the oxygen chamber main board via the Bluetooth Low Energy (BLE) protocol. The oxygen chamber main board receives and analyzes this data to obtain continuous and dynamic cerebral oxygen saturation values.

[0068] "For determining the adjustment amplitude" does not mean directly replacing the oxygen concentration in the chamber with cerebral oxygen saturation as the sole control variable, but rather using it as a key weighting factor or adjustment gain to dynamically adjust the control response intensity based on the oxygen concentration deviation in the chamber. The adjustment amplitude is specifically embodied as a dynamic adjustment coefficient.

[0069] For example, the real-time acquired cerebral oxygen saturation can be compared with a healthy or target cerebral oxygen threshold (e.g., 65%) set for the user to obtain a cerebral oxygen status coefficient (denoted as K_rSO2). The calculation of the cerebral oxygen status coefficient is designed as a continuous and non-linear function, and its data processing logic and process are as follows to achieve more refined adaptive adjustment: (1) Data input and normalization: Real-time cerebral oxygen saturation (rSO2_realtime): Obtained in real-time from the cerebral oxygen monitor. Target cerebral oxygen threshold (rSO2_target): Preset by the user or medical staff, e.g., 65%. Cerebral oxygen safety lower limit (rSO2_limit): A safety critical value set by the system, e.g., 55%.

[0070] (2) Data processing logic (piecewise function to calculate K_rSO2): Safe zone (rSO2_realtime≥rSO2_target): In this area, the user's cerebral oxygen supply is sufficient. K_rSO2 is set to the constant 1.0, indicating that the system adjusts according to the standard oxygen concentration deviation without additional intervention.

[0071] Warning zone (rSO2_limit≤rSO2_realtime<rSO2_target): In this area, the user's cerebral oxygen level is low and the oxygen supply needs to be enhanced. K_rSO2 is calculated by the following function: K_rSO2 = 1.0 + A×((rSO2_target - rSO2_realtime) / (rSO2_target - rSO2_limit))^n Among them, A is the maximum gain coefficient (e.g., 0.5), and n is the exponential coefficient (e.g., 2) used to adjust the nonlinear degree of the curve. This function enables K_rSO2 to smoothly transition from 1.0 to 1.5, and the closer it is to the safety lower limit, the larger the value of K_rSO2 and the faster the growth rate.

[0072] Dangerous area (rSO2_realtime < rSO2_limit): Once entering this area, it indicates that there may be an emergency. At this time, not only is K_rSO2 set to its maximum value (e.g., 1.5), but additional audible and visual alarms are also triggered, and other safety settings of the oxygen chamber main board may be automatically adjusted.

[0073] (3) Final adjustment amplitude calculation: The final adjustment amplitude (Adjustment_Final) used to adjust the oxygen production of the oxygen generator is obtained by multiplying the basic adjustment amount (Adjustment_Base) calculated from the oxygen concentration deviation in the chamber by the cerebral oxygen state coefficient (K_rSO2): Adjustment_Final = Adjustment_Base × K_rSO2 This dual - closed - loop adaptive control strategy that combines environmental parameters (oxygen concentration in the chamber) with human core physiological parameters (cerebral oxygen saturation) upgrades the oxygen chamber from a "passive" device that only maintains a preset environment to an "active" health protection system that can make intelligent responses according to the user's real - time physiological feedback.

[0074] It can be seen that the embodiment of the present application combines the control of the chamber environment with the user's core physiological indicators, achieving a leap from "controlling the environment" to "guaranteeing individual physiological needs". It not only greatly improves the personalization, precision, and safety of oxygen therapy, but also can more efficiently handle individual differences and emergencies, ensuring that each user can obtain the optimal oxygen therapy effect.

[0075] In some embodiments of the present application, the third control instruction is used to control the opening degree of the exhaust valve to increase to the second target opening degree and simultaneously reduce the rotational speed of the air compressor to a preset idle rotational speed.

[0076] Specifically, the second target opening degree is a relatively large opening percentage that the exhaust valve needs to reach during the pressure - reducing stage, and its value is usually between 80% and 100% to ensure the efficient discharge of high - pressure gas in the chamber. The preset idle rotational speed refers to a relatively low, non - zero rotational speed maintained by the air compressor during the pressure - reducing stage. "Simultaneously reduce" means that while the exhaust valve starts to increase, the rotational speed of the air compressor also starts to decrease, and the two actions are coordinated.

[0077] In some embodiments of this application, after the third control command is triggered, the exhaust valve opening immediately jumps from a small opening (or closed state) during the pressure stabilization phase to 90% (i.e., the second target opening). Simultaneously, the air compressor speed rapidly decreases from the pressure stabilization state (e.g., 2000 rpm) to 500 rpm (i.e., the preset idle speed). This coordinated "large exhaust, small replenishment" strategy ensures the main depressurization rate through the large opening of the exhaust valve, while simultaneously maintaining idle operation of the air compressor to continuously replenish a small amount of fresh air into the cabin. This design avoids the potential accumulation of carbon dioxide concentration and stuffiness that might occur during fully enclosed depressurization due to gas only exiting and not entering, significantly improving user comfort and safety during the depressurization process.

[0078] After sending the third control command from the oxygen chamber mainboard to the outdoor unit board, it also includes: S601, Detect the rate of pressure drop of pressure data inside the chamber; In the embodiments of this application, the pressure drop rate refers to the amount of pressure data reduction per unit time. Its calculation method is similar to the pressure rise rate, but it is either negative or its absolute value is compared. The oxygen chamber mainboard continuously monitors pressure changes, providing a data basis for achieving dynamic feedback control of the depressurization process.

[0079] S602. If the pressure drop rate is detected to exceed the preset pressure drop rate threshold, the oxygen chamber mainboard sends a command to the external unit board to reduce the opening of the exhaust valve.

[0080] In the embodiments of this application, the preset pressure drop rate threshold is a safe upper limit set to protect the user's eardrum from discomfort or damage caused by drastic pressure changes. This command only adjusts the opening of the exhaust valve and does not change the idle speed of the air compressor.

[0081] In some embodiments of this application, the preset pressure drop rate threshold is set to -0.025 MPa / min (or its absolute value of 0.025 MPa / min). When the real-time monitored pressure drop rate exceeds this threshold, the oxygen chamber mainboard immediately sends a command to reduce the opening of the exhaust valve by 15% (e.g., from 90% to 76.5%). This closed-loop negative feedback regulation mechanism based on the pressure drop rate can control the depressurization rate in real time and accurately, smoothing the pressure curve of the entire depressurization process, effectively preventing sudden pressure drops, and providing a safe and comfortable depressurization experience for all users, especially those sensitive to pressure changes.

[0082] As can be seen, the embodiments of this application innovatively solve the comfort problem during the pressure reduction process by coordinating the "large exhaust and small replenishment" action of the exhaust valve and the air compressor; secondly, by introducing a closed-loop negative feedback mechanism based on the pressure drop rate, the exhaust valve is dynamically fine-tuned, thereby achieving flexible and safe control of the pressure reduction process.

[0083] In some embodiments of this application, the first control command is used to control the opening degree of the intake valve, the speed of the air compressor, the oxygen production of the oxygen generator, and the intensity of the negative oxygen ion generator to increase synchronously.

[0084] Specifically, cabin air quality optimization begins during the pressurization phase. The intensity of the negative ion generator typically refers to its operating power, applied voltage, or output current, a parameter that directly determines the rate of negative ion generation. The "synchronous increase" here refers to a multi-parameter coordinated linear or non-linear ramp-up strategy, ensuring a smooth and coordinated increase in cabin pressure, oxygen concentration, and negative ion concentration from zero, rather than a step-like abrupt change.

[0085] In some embodiments of this application, in order to achieve precise and synchronous increases in the opening degree of the air intake valve, the speed of the air compressor, the oxygen production of the oxygen generator, and the intensity of the negative oxygen ion generator, the main board of the oxygen chamber can adopt a multi-objective trajectory planning algorithm based on the time axis.

[0086] Other control methods for constant temperature, constant oxygen, and constant pressure include: S701 collects the concentration of negative oxygen ions in the chamber where the oxygen chamber's main board is located. The second control command is also used to adjust the intensity of the negative oxygen ion generator according to the concentration of negative oxygen ions.

[0087] In the embodiments of this application, negative oxygen ion concentration is one of the important indicators for evaluating air quality, referring to the number of negative ions contained in a unit volume of air, and the commonly used unit is "ions / cm³". 3 The concentration of negative oxygen ions is collected by a negative oxygen ion concentration sensor installed inside the chamber. The sensor transmits the real-time measurement value to the main board of the oxygen chamber, providing data for subsequent closed-loop regulation.

[0088] During the pressure stabilization phase, various environmental parameters need to be kept constant. In the intensity adjustment logic of the negative ion generator, the oxygen chamber mainboard compares the real-time collected negative ion concentration with a preset target concentration value (e.g., 5000 ions / cm³). 3 The concentration deviation is obtained by comparison. In some embodiments of this application, a PID control algorithm can be used to achieve precise steady-state control of the negative oxygen ion concentration. When the detected concentration deviation exceeds a preset dead zone range (e.g., ±500 ions / cm³), the concentration deviation is determined. 3When the PID controller calculates an optimal adjustment value based on the magnitude, duration, and trend of the deviation, it translates this value into a specific adjustment command for the working intensity of the negative ion generator. This effectively suppresses concentration fluctuations and quickly responds to concentration changes caused by user activities or minor leaks in the cabin, ensuring that the cabin remains in a constant, fresh, and comfortable negative ion environment throughout the entire pressure stabilization phase.

[0089] As can be seen, this embodiment of the application synchronously starts the negative ion generator with core equipment such as pressurization and oxygen production, achieving a synergistic improvement in the quality of the cabin environment from the initial stage. Secondly, by introducing closed-loop feedback control of negative ion concentration, the generator intensity is dynamically and precisely adjusted during the pressure stabilization stage, providing users with a constant, fresh, and comfortable cabin microenvironment.

[0090] In some embodiments of this application, during the pressurization phase, the opening degree of the intake valve and the rate of increase of the air compressor speed can be controlled based on multidimensional physiological parameters. Specifically, the control system integrates multidimensional physiological parameter monitoring functions. Multidimensional physiological parameters refer to a set of key vital signs indicators that comprehensively reflect the human body's stress response to high-altitude, low-pressure, and low-oxygen environments. These multidimensional physiological parameters are collected through a wireless wearable biosensor kit. This wireless wearable biosensor specifically includes: Heart rate (HR) and heart rate variability (HRV) monitoring modules: These are typically integrated into smart wristbands or chest straps. They collect instantaneous heart rate values ​​and beat interval data using photoplethysmography (PPG) or electrocardiography (ECG) techniques. The latter is used to calculate time-domain metrics (such as the Standard Deviation of NNintervals) and frequency-domain metrics (such as the LF / HF ratio) to quantify the balance between the sympathetic and parasympathetic nervous systems.

[0091] Peripheral Oxygen Sataturation (SpO2) monitoring module: usually a finger clip or pulse oximeter integrated into a wristband, which calculates the percentage of oxyhemoglobin in peripheral arterial blood by measuring the absorption rate of red light of different wavelengths in the capillary bed of the fingertip or wrist.

[0092] Respiratory rate (RR) monitoring module: can be obtained by analyzing the chest cavity fluctuation signal collected by the chest strap, or by extracting respiratory modulation information (EDR, ECG-Derived Respiration) from the electrocardiogram signal, with the unit being breaths / minute.

[0093] Regional Oxygen Saturation (rSO2) monitoring module: This is achieved through a near-infrared spectroscopy (NIRS) sensor worn on the user's forehead, specifically designed to reflect the local tissue oxygenation status of the prefrontal cortex of the brain.

[0094] In the embodiments of this application, the control system constructs a comprehensive altitude sickness assessment model. This comprehensive altitude sickness assessment model is an algorithm model embedded in the oxygen chamber's mainboard firmware. Its core function is to integrate the aforementioned multidimensional physiological parameters with current environmental parameters, outputting a quantitative index that dynamically reflects the user's risk of acute mountain sickness (AMS). This index is defined as the "Altitude Sickness Index (AMS Score)," with a value ranging from 0 to 100. The comprehensive altitude sickness assessment model uses a weighted summation method for calculation, and its formula is: AMS Score = Σ(Wi × Fi (Pi)).

[0095] Here, Pi represents individual physiological or environmental parameter inputs (such as heart rate, blood oxygen saturation, rate of pressure rise, etc.), and Fi(Pi) is a normalization function that maps the measured value of each raw parameter Pi to a standardized score between 0 and 1. This function is usually a non-linear function, such as a sigmoid function, which reflects the non-linear growth characteristics of risk when physiological parameters deviate from the normal range. For example, for blood oxygen saturation, when it drops from 95% to 90%, the altitude sickness index may only increase from 0.1 to 0.3; but when it further decreases from 90% to 85%, the altitude sickness index may surge to 0.8.

[0096] Wi is a weighting coefficient assigned to each parameter Pi, and their sum is 100. These weights are set based on the correlation strength between various indicators and altitude sickness in clinical medical studies. For example, indicators reflecting hypoxia in core organs and autonomic nervous system dysfunction, such as cerebral oxygen saturation and heart rate variability, are given higher weights than compensatory indicators such as respiratory rate.

[0097] In the embodiments of this application, the control process for the increase rate of the intake valve opening and the air compressor speed is implemented based on a rolling time-domain optimization algorithm. In each control cycle (e.g., every 5 seconds), the processor of the oxygen chamber mainboard performs the following calculations: (1) State prediction: A set of candidate rates of pressure rise (e.g., 0.005, 0.010, 0.015, 0.020 MPa / min) can be virtually tested. For each candidate rate, a simplified physiological response model can be used to predict how the user's physiological indicators will change in the next prediction time domain (e.g., 60 seconds), and the predicted AMS Score trajectory can be calculated accordingly.

[0098] (2) Constraint evaluation: Examine each predicted AMS Score trajectory and eliminate all candidate rates that exceed the preset safety threshold (e.g., AMS Score>60) at any time point in the prediction time domain.

[0099] (3) Optimal selection: Among all candidate rates that meet the safety constraints, the rate that can make the pressure rise the fastest can be selected as the "optimal instantaneous rate" for the current cycle.

[0100] (4) Command conversion: The calculated "optimal instantaneous rate" is converted into specific and precise pulse width modulation signals and frequency converter commands for the opening degree of the intake valve and the speed of the air compressor, and sent to the outdoor unit board for execution.

[0101] It can be seen that this closed-loop control logic, which takes the user's physiological state as the core constraint, transforms the pressurization process of the micro-hyperbaric oxygen chamber into a dynamic optimization process with the user's physiological safety and comfort as the highest priority through the real-time fusion of multi-dimensional physiological parameters and the quantitative assessment of altitude sickness.

[0102] In some embodiments of this application, a control system is also provided, comprising an oxygen chamber motherboard and an external unit board, for executing any of the control methods for constant temperature, oxygen, and pressure. Its distributed hardware architecture adopts a separate design of "oxygen chamber motherboard (monitoring and control) + external unit board (peripheral driver)" to avoid electromagnetic interference from heavy equipment affecting sensor acquisition accuracy, while also reducing the load on the motherboard.

[0103] The core technological foundations of control systems include: Environmental monitoring technology: Basic parameters are collected using temperature and humidity sensors, electrochemical oxygen sensors, and piezoresistive pressure sensors; Electromechanical control technology: Drives external devices such as oxygen generators, air compressors, and air conditioners through relays and frequency converters to regulate the cabin environment; Serial communication technology: RS232 (Recommended Standard 232) and RS485 (Recommended Standard 485) buses are used to realize data interaction between the main control board and peripherals. Among them, RS485 has become a commonly used communication standard for small and medium-sized equipment due to its long distance (≤1000m) and anti-interference characteristics.

[0104] Please see Figure 2 This is a schematic diagram of the hardware modules of the control system in this embodiment. The control system mainly consists of two core parts: the oxygen chamber motherboard and the outdoor unit board.

[0105] (1) Oxygen chamber mainboard: The oxygen chamber's mainboard is the core control and monitoring unit of the control system, primarily responsible for environmental sensing within the chamber, user interaction, and driving some equipment. Its functions include: Display Interfaces: Two display interfaces are provided for connecting to displays inside and outside the cabin to show environmental parameters, equipment status, or user interfaces.

[0106] Environmental sensing: Integrates multiple sensors for real-time monitoring of the cabin environment, including temperature and humidity sensors, oxygen sensors, differential pressure sensors, and negative oxygen ion sensors.

[0107] Communication and control: including brain oxygen Bluetooth communication (for wireless data communication with portable brain oxygen monitoring devices), indoor lighting control (responsible for adjusting the lighting inside the oxygen chamber), and negative oxygen ion generator control (controlling the on / off and intensity of the negative oxygen ion generator based on sensor data or preset programs).

[0108] The hardware selection for the oxygen chamber's mainboard is shown in the table below: (2) Outdoor unit panel: The external control board is the external device drive unit of the control system. It receives instructions from the oxygen chamber mainboard through the standard communication interface RS485 to control key electromechanical equipment in order to maintain and regulate the operating environment of the oxygen chamber.

[0109] The hardware selection for the outdoor unit board is shown in the table below: Among them, PSA (Pressure Swing Adsorption) is a technology that utilizes the characteristic that the adsorbent's ability to adsorb gases changes with pressure, and achieves gas separation and purification through periodic pressure changes.

[0110] As can be seen, the hardware architecture of the control system depicts a collaborative system consisting of a mainboard for the oxygen chamber (responsible for internal monitoring, interaction, and logic control) and an external board (responsible for driving external heavy equipment). Together, they achieve comprehensive management functions for a closed environment (such as an oxygen chamber), including oxygen supply, temperature control, air purification, and quality monitoring. This control system has the following advantages: Distributed hardware architecture: It adopts a separate design of "oxygen chamber motherboard (monitoring and control) + external board (peripheral driver)" to avoid the impact of electromagnetic interference from heavy equipment on the sensor acquisition accuracy, while reducing the motherboard load (the main control chip utilization rate is reduced from 80% to 40%). Multi-parameter linkage control algorithm: coordinated adjustment of "pressure-oxygen concentration-air compressor speed" in the oxygen therapy process; A comprehensive monitoring system that integrates environmental parameters (temperature, humidity, oxygen, pressure, negative oxygen ions) with physiological parameters (brain oxygen) to achieve a dual closed loop of "environment-physiology".

[0111] Please see Figure 3 This diagram illustrates the software control of the control system in this embodiment. It clearly demonstrates how the main program, acting as a control hub, manages the entire system through data acquisition, communication, and process control.

[0112] (1) Core control logic (top level) The main program has two core tasks: Temperature and humidity control: Maintaining a comfortable and stable environment inside the cabin.

[0113] Oxygen therapy process control: This is a core automated process that includes pressure control and oxygen content control.

[0114] To achieve coordinated control of "pressure, oxygen concentration, and air compressor speed," the process is divided into three stages: "pressure increase, oxygen stabilization and pressure maintenance, and pressure reduction." (1) Pressure boosting stage: Objective: Increase the pressure from atmospheric pressure (0.1 MPa) to the set pressure (e.g., 0.2 MPa) while simultaneously increasing the oxygen concentration to the set value.

[0115] Logic: The intake valve opening is linearly increased from 0% to 50%, while the air compressor is started and its speed is increased from 0 rpm to 2000 rpm (discharge volume 40L / min); the oxygen generator PWM duty cycle is increased from 0% to 80% (output oxygen 8L / min); the pressure and oxygen concentration are monitored in real time. If the pressure rise rate is >0.02MPa / min, the intake valve opening is reduced by 10% and the air compressor speed is reduced by 200 rpm; if the oxygen concentration is <set value -2%, the oxygen generator PWM duty cycle is increased by 5%.

[0116] (2) Oxygen stabilization and pressure maintenance stage: Target: Maintain pressure ±0.005 MPa and oxygen concentration ±1%.

[0117] Logic: When the pressure is higher than the set value by +0.005MPa, open the exhaust valve (opening degree 20%~50%) and reduce the air compressor speed by 100~200rpm; when the pressure is lower than the set value by -0.005MPa, increase the intake valve opening by 10%~30% and increase the air compressor speed by 100~200rpm; when the oxygen concentration is higher than the set value by +1%, decrease the oxygen generator PWM duty cycle by 3%~5%; when the oxygen concentration is lower than the set value by -1%, increase the oxygen generator PWM duty cycle by 3%~5% and maintain the air compressor speed stable.

[0118] (3) Pressure reduction phase: Objective: Reduce the set pressure to atmospheric pressure (0.1 MPa) and reduce the oxygen concentration to 21% (air concentration).

[0119] Logic: Turn off the oxygen generator, open the exhaust valve (80%~100%), and at the same time reduce the air compressor speed to 500 rpm (maintaining only a small amount of fresh air intake); control the pressure drop rate at 0.01 MPa / min. If the rate is too fast, reduce the exhaust valve opening by 20%~30%.

[0120] (2) Data acquisition layer (middle layer) To achieve the above control, the main program needs to continuously acquire data from multiple sensors, including: temperature and humidity data acquisition, oxygen data acquisition, and negative oxygen ion data acquisition.

[0121] The frequency of each acquisition parameter and the data processing logic are shown in the table below: (3) Communication layer (bottom layer) The main program exchanges data and controls other hardware modules inside and outside the system through the following communication links: Brain oxygen data communication: Communicates with brain oxygen monitoring equipment to monitor the user's physiological state.

[0122] Outdoor unit communication: This is the most critical control link, which sends control commands (such as on / off and speed settings) to the outdoor unit board to drive large equipment such as air conditioners, air compressors, and valves.

[0123] Dual-screen communication: responsible for pushing data to two display interfaces, updating the user interface, and displaying real-time status, treatment parameters, and other information.

[0124] Please see Figure 4 This is a schematic diagram of the control system in an embodiment of this application.

[0125] exist Figure 4 The control system includes the cabin of the micro hyperbaric oxygen chamber (single-person cabin) and the control unit outside.

[0126] (1) The cabin (single-person cabin) includes: Core controller: In-cabin control board (i.e., oxygen chamber mainboard); Sensors (input signals to the control board): temperature and humidity sensor, oxygen concentration sensor, pressure sensor, negative oxygen ion sensor; Execution and display equipment (controlled / connected by the control panel): lighting, air conditioning unit (connected to the cabin control panel via power supply lines), oxygen outlet (receiving air from the oxygen generator); Gas and piping: intake silencer, emergency pressure relief valve, safety valve (over-pressure relief), water pipe (connecting the indoor and outdoor air conditioning units), gas pipe (connecting to the outside environment).

[0127] (2) The outdoor unit control unit includes: Power system: power switch (including live wire, neutral wire, and ground wire), fuses (multiple), 220V to 24V module (multiple); Control boards: outdoor unit board (not shown in the diagram), power distribution board, main unit (supplying power to the control board inside the cabin), cabinet control board; Equipment used: oxygen generator, air conditioner (outdoor unit), water pump, booster compressor (i.e., air compressor); Valves and pipelines: intake solenoid valve (connects the booster and the in-cabin intake silencer), exhaust solenoid valve, exhaust silencer.

[0128] The control device in the embodiments of this application is described below from the perspective of hardware processing. Please refer to [link / reference needed]. Figure 5 This is a schematic diagram of at least a portion of the physical structure of the control device in the embodiments of this application.

[0129] It should be noted that, Figure 5 The structure of the control device shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments described in this application. The control device may be integrated with a control system, or integrated into a control system.

[0130] like Figure 5 As shown, the control device includes a CPU 501, which can perform various appropriate actions and processes according to a program stored in ROM 502 or a program loaded into RAM 503 from storage section 508, such as executing the methods described in the above embodiments. RAM 503 also stores various programs and data required for device operation. CPU 501, ROM 502, and RAM 503 are interconnected via bus 504. I / O interface 505 is also connected to bus 504.

[0131] The following components are connected to I / O interface 505: input section 506 including audio input devices, push-button switches, etc.; output section 507 including liquid crystal display (LCD) and audio output devices, indicator lights, etc.; storage section 508 including hard disks, etc.; and communication section 509 including network interface cards such as LAN (Local Area Network) cards, modems, etc. Communication section 509 performs communication processing via a network such as the Internet. Drive 510 is also connected to I / O interface 505 as needed. Removable media 511, such as disks, optical disks, magneto-optical disks, semiconductor memories, etc., are installed on drive 510 as needed so that computer programs read from them can be installed into storage section 508 as needed.

[0132] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program including a computer program for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 509, and / or installed from removable medium 511. When the computer program is executed by CPU 501, it performs the various functions defined in this application.

[0133] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which includes one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those shown in the drawings.

[0134] Specifically, the control device in this embodiment includes a processor and a memory. The memory stores a computer program. When the computer program is executed by the processor, it implements the control method for constant temperature, constant oxygen and constant pressure provided in the above embodiment.

[0135] In another aspect, this application also provides a computer-readable storage medium, which may be included in the control device described in the above embodiments; or it may exist independently and not assembled into the control device. The storage medium carries one or more computer programs, which, when executed by a processor of the control device, cause the control device to implement the control method for constant temperature, constant oxygen, and constant pressure provided in the above embodiments.

[0136] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application 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. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A control method for constant temperature, constant oxygen, and constant pressure, characterized by, The control method for constant temperature, constant oxygen and constant pressure is applied to a control system including an oxygen cabin mainboard and an external machine board, and comprises the following steps: Collecting temperature data, oxygen concentration data and pressure data in a cabin body where the oxygen cabin mainboard is located; Determining a current working stage according to the pressure data and a preset target pressure value, wherein the working stage includes a pressure increasing stage, a pressure stabilizing stage and a pressure decreasing stage; If the current working stage is the pressure increasing stage, sending a first control instruction from the oxygen cabin mainboard to the external machine board, wherein the first control instruction is used to control synchronous increase of an air inlet valve opening degree of the cabin body, an air compressor rotating speed and an oxygen generator oxygen generating amount; If the current working stage is the pressure stabilizing stage, sending a second control instruction from the oxygen cabin mainboard to the external machine board according to the temperature data, the oxygen concentration data and the pressure data, wherein the second control instruction is used to simultaneously adjust at least two of the air outlet valve opening degree, the air inlet valve opening degree, the air compressor rotating speed, the oxygen generator oxygen generating amount and a temperature adjusting capacity of an air conditioner of the cabin body; If the current working stage is the pressure decreasing stage, sending a third control instruction from the oxygen cabin mainboard to the external machine board, wherein the third control instruction is used to control the oxygen generator to be closed and to control synchronous change of the air outlet valve opening degree and the air compressor rotating speed, wherein the air outlet valve opening degree has an increasing trend and the air compressor rotating speed has a decreasing trend.

2. The control method for constant temperature, constant oxygen, and constant pressure according to claim 1, wherein, The first control instruction is used to: Control the air inlet valve opening degree to increase from a preset opening degree initial value to a first target opening degree at a first preset rate, control the air compressor rotating speed to synchronously increase from a preset rotating speed initial value to a first target rotating speed, and control a pulse width modulation duty cycle of the oxygen generator to synchronously increase from a preset duty cycle initial value to a first target duty cycle. After the first control instruction is sent from the oxygen cabin mainboard to the external machine board, the following steps are further included: Detecting a pressure rising rate of the pressure data in the cabin body; If the detected pressure rising rate exceeds a preset pressure rising rate threshold, sending an instruction from the oxygen cabin mainboard to the external machine board to reduce the air inlet valve opening degree and the air compressor rotating speed.

3. The control method for constant temperature, constant oxygen, and constant pressure according to claim 1, wherein, According to the temperature data, the oxygen concentration data and the pressure data, the second control instruction is sent from the oxygen cabin mainboard to the external machine board, which includes the following steps: Obtaining a pressure deviation between the pressure data and a set pressure in the pressure stabilizing stage; If the pressure deviation is not within a preset pressure deviation range, sending the second control instruction from the oxygen cabin mainboard to the external machine board to simultaneously adjust the air outlet valve opening degree and the air compressor rotating speed or simultaneously adjust the air inlet valve opening degree and the air compressor rotating speed through the second control instruction.

4. The control method for constant temperature, constant oxygen, and constant pressure according to claim 3, wherein, According to the temperature data, the oxygen concentration data and the pressure data, the second control instruction is sent from the oxygen cabin mainboard to the external machine board, which further includes the following steps: Obtaining an oxygen concentration deviation between the oxygen concentration data and a set oxygen concentration in the pressure stabilizing stage; If the oxygen concentration deviation is not within a preset concentration deviation range, sending the second control instruction from the oxygen cabin mainboard to the external machine board to adjust the oxygen generator oxygen generating amount through the second control instruction and maintain the air compressor rotating speed unchanged.

5. The control method for constant temperature, constant oxygen, and constant pressure according to claim 4, wherein, The control method for constant temperature, constant oxygen and constant pressure further comprises: Collecting the brain oxygen saturation of the target object in the cabin body where the oxygen cabin mainboard is located, the brain oxygen saturation being used to determine the adjustment range when adjusting the oxygen amount of the oxygen generator.

6. The control method for constant temperature, constant oxygen, and constant pressure according to claim 1, wherein, The third control instruction is used to control the exhaust valve opening to increase to a second target opening, and simultaneously reduce the air compressor speed to a preset idle speed. After the oxygen cabin mainboard sends the third control instruction to the external machine board, the method further comprises: Detecting the pressure drop rate of the pressure data in the cabin body; If it is detected that the pressure drop rate exceeds a preset pressure drop rate threshold, the oxygen cabin mainboard sends an instruction to reduce the exhaust valve opening to the external machine board.

7. The control method for constant temperature, constant oxygen, and constant pressure according to claim 1, wherein, The first control instruction is used to control the synchronous increase of the air inlet valve opening, the air compressor speed, the oxygen amount of the oxygen generator, and the intensity of the negative oxygen ion generator. The control method for constant temperature, constant oxygen and constant pressure further comprises: Collecting the negative oxygen ion concentration in the cabin body where the oxygen cabin mainboard is located, and the second control instruction is further used to adjust the intensity of the negative oxygen ion generator according to the negative oxygen ion concentration.

8. A control system characterized by, The control system comprises an oxygen cabin mainboard and an external machine board, and is used to execute the control method for constant temperature, constant oxygen and constant pressure according to any one of claims 1 to 7.

9. A control device characterized by comprising: The control device comprises: one or more processors and a memory; The memory is coupled to the one or more processors, and the memory is used to store computer program codes, the computer program codes comprising computer instructions, and the one or more processors invoke the computer instructions to make the control device execute the control method for constant temperature, constant oxygen and constant pressure according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium comprises instructions which, when executed on the control system, cause the control system to execute the control method for constant temperature, constant oxygen and constant pressure according to any one of claims 1 to 7.

Images