A micro-pressure oxygen-enriched chamber oxygen concentration monitoring system

Abstract

This utility model discloses an oxygen concentration monitoring system for a micro-pressure oxygen-enriched chamber, belonging to the technical field of special environment control equipment. It includes a current-type zirconia sensor and a PLC controller. The current-type zirconia sensor has several vent holes and is electrically connected to an oxygen concentration sensor probe. A power line and a signal line connect the current-type zirconia sensor to the PLC controller, which is electrically connected to a control panel. This application relates to a sensitive and high-precision oxygen concentration detection technology, which has the advantages of long lifespan, high accuracy, and minimal impact from changes in chamber pressure, thus solving the problem of oxygen concentration monitoring in micro-pressure oxygen-enriched chambers. The current-type zirconia sensor has a wide measurement range, capable of measuring oxygen concentrations from 10 ppm to 96% oxygen; it has a long lifespan and low signal drift; and it has a wide operating pressure range of 80-500 kPa, meeting the operating requirements of micro-pressure oxygen-enriched chambers.

Description

Technical Field

[0001] This utility model relates to the technical field of special environmental control equipment, and in particular to a micro-pressure oxygen-enriched chamber oxygen concentration monitoring system. Background Technology

[0002] A micropressure oxygen chamber is a specialized medical device that provides a micropressure environment, ensuring patients can effectively, comfortably, and safely inhale oxygen in a high-pressure environment to treat diseases. Micropressure oxygen therapy has been applied in multiple disciplines, including emergency medicine, internal medicine, surgery, obstetrics and gynecology, ENT, and dermatology. Micropressure oxygen therapy refers to the method of placing patients in a micropressure oxygen chamber to receive pressurized oxygen inhalation for treatment.

[0003] A micro-pressure oxygen-enriched chamber is a device that provides a high concentration of oxygen under controlled pressure. Unlike traditional hyperbaric oxygen chambers, micro-pressure oxygen-enriched chambers typically maintain an internal pressure slightly above atmospheric pressure (approximately 1.1–1.3 atmospheres), while the oxygen concentration is generally maintained between 21% and 30%, higher than the 21% found in ordinary air. This slightly increased pressure and oxygen-enriched environment helps increase the dissolved oxygen content in the blood, promoting more efficient oxygen absorption by body tissues, thereby improving health, assisting in treatment, and enhancing bodily functions.

[0004] The operation of a low-pressure oxygen-enriched chamber is mainly based on two core principles:

[0005] Slight pressurization: A slight increase in cabin pressure can increase the ability of oxygen molecules to enter the plasma (the liquid part of blood), effectively improving tissue oxygen supply even without relying on red blood cell transport.

[0006] High-concentration oxygen supply: Oxygen-rich air is delivered into the cabin through an oxygen generator or centralized oxygen supply system to further improve blood oxygen levels, which helps repair damaged cells, improve metabolism and enhance immunity.

[0007] In short, a low-pressure oxygen-enriched chamber provides the human body with a better oxygen supply in a comfortable state through "moderate pressure + higher oxygen concentration".

[0008] Due to their high safety and comfortable experience, low-pressure oxygen-enriched chambers have been widely used in many fields:

[0009] Rehabilitation medicine: used as an adjunct treatment for diseases such as sequelae of stroke, chronic fatigue syndrome, diabetic foot, and postoperative recovery.

[0010] Sports recovery: Professional athletes use micro-pressure oxygen chambers to accelerate muscle repair, reduce inflammation, and improve recovery speed.

[0011] Beauty and anti-aging: Improves skin oxygen supply, promotes cell metabolism, and helps to tighten the skin and reduce wrinkles.

[0012] Sub-health conditioning: relieves stress, improves sleep, and enhances physical fitness; suitable for people who work long hours under high pressure and stay up late.

[0013] Altitude acclimatization: Helps people entering high-altitude areas quickly adapt to the low-oxygen environment and prevent altitude sickness.

[0014] In addition, micro-pressure oxygen-enriched chambers have shown broad application prospects in pet rehabilitation, rehabilitation of children with special needs (such as autism intervention), and health care for the elderly.

[0015] Overall, micro-pressure oxygen-enriched chambers are highly safe. Due to the gentle pressure changes and controllable oxygen concentration, most people can use them with peace of mind. As a health technology product that combines comfort and functionality, micro-pressure oxygen-enriched chambers are increasingly being used in the medical, sports rehabilitation, and health management fields. Whether you wish to improve your sub-health condition or assist in disease recovery, micro-pressure oxygen-enriched chambers offer a gentle yet effective new option.

[0016] Regarding the aforementioned technologies, the applicant has found that the sensors currently used for oxygen concentration monitoring in similar micro-pressure oxygen-enriched chambers in China mainly fall into three categories: 1. Electrochemical sensors; 2. Ultrasonic sensors; and 3. Fluorescent sensors. Control systems developed using these three types of sensors monitor the oxygen concentration within the chamber. However, all three types of oxygen concentration sensors have problems: 1. Electrochemical sensors have short lifespans, large signal drift, and their measured values ​​are affected by changes in chamber pressure; 2. Ultrasonic sensors have long lifespans but poor accuracy, with an industry average accuracy of 1.5%–1.8% FS, which cannot meet the application requirements of micro-pressure oxygen-enriched chambers; 3. Fluorescent sensors have long lifespans and high accuracy, but their operating pressure range is 50-120 kPa, while the operating pressure in oxygen chambers can reach 130 kPa, and the ultimate pressure can reach 150 kPa. Therefore, all three types of oxygen concentration sensors have practical limitations in monitoring oxygen concentration in micro-pressure oxygen-enriched chambers. Therefore, there is an urgent need for an oxygen concentration sensor with long lifespan, high accuracy, and minimal impact from changes in chamber pressure to solve the problem of oxygen concentration monitoring in micro-pressure oxygen-enriched chambers. Utility Model Content

[0017] This invention addresses the shortcomings of existing technologies by providing a micro-pressure oxygen-enriched chamber oxygen concentration monitoring system. This system is a sensitive and high-precision oxygen concentration detection technology with advantages such as long lifespan, high accuracy, and minimal impact from changes in chamber pressure. It can solve the problem of monitoring oxygen concentration in micro-pressure oxygen-enriched chambers.

[0018] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0019] A micro-pressure oxygen-enriched chamber oxygen concentration monitoring system includes a current-type zirconia sensor and a PLC controller. The current-type zirconia sensor has several ventilation holes. The current-type zirconia sensor is electrically connected to an oxygen concentration sensor probe. A power line and a signal line are connected between the current-type zirconia sensor and the PLC controller. The PLC controller is electrically connected to a control panel.

[0020] Furthermore, the current-type zirconia sensor is electrically connected to a temperature sensor probe.

[0021] Furthermore, the current-type zirconia sensor is equipped with a temperature regulation component, which is electrically connected to the temperature sensor probe. The temperature regulation component includes a constant resistor.

[0022] Furthermore, the current-type zirconia sensor is electrically connected to a humidity sensor probe.

[0023] Furthermore, the current-type zirconia sensor is equipped with a heating component, which is electrically connected to the humidity sensor probe.

[0024] Furthermore, the PLC controller is electrically connected to an audible and visual alarm device.

[0025] Furthermore, the PLC controller is electrically connected to a pressure compensation device, which includes a pressure balancing valve. The pressure balancing valve is located inside the chamber and is connected to the outside air.

[0026] In summary, compared with the prior art, the beneficial effects of the above technical solution are:

[0027] 1. This application relates to a sensitive and high-precision oxygen concentration detection technology, which has the advantages of long life, high accuracy and minimal impact from changes in cabin pressure, and can solve the problem of monitoring oxygen concentration in a low-pressure oxygen-enriched chamber.

[0028] 2. The current-type zirconia sensor in this application has a wide measurement range, and can measure oxygen concentrations ranging from 10 ppm to 96% oxygen.

[0029] 3. The current-type zirconia sensor in this application has a long lifespan and low signal drift.

[0030] 4. The current-type zirconia sensor in this application has a wide working pressure range of 80-500 kPa, which can meet the working requirements of micro-pressure oxygen-enriched chambers.

[0031] 5. The current-type zirconia sensor in this application is less affected by ambient temperature. If the temperature deviation is within ±10℃, it can be ignored. If the temperature deviation is large, a temperature adjustment component (constant resistor method) can be used to compensate for temperature changes and further reduce the influence of ambient temperature.

[0032] 6. The current-type zirconia sensor in this application is less affected by ambient humidity. By using a heating component, condensation can be prevented from forming on the sensor body, further reducing the impact of ambient humidity. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structural position in an embodiment of the present utility model;

[0034] Figure 2 This is a schematic diagram of the control logic in an embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Current-type zirconia sensor; 11. Oxygen concentration sensor probe; 12. Temperature sensor probe; 13. Humidity sensor probe; 14. Temperature regulation component; 15. Heating component; 2. PLC controller; 21. Control panel; 22. Audible and visual alarm device; 23. Pressure compensation device. Detailed Implementation

[0037] The principles and features of this utility model are described below with reference to all the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0038] This utility model discloses an oxygen concentration monitoring system for a micro-pressure oxygen-enriched chamber.

[0039] Reference Figure 1 and Figure 2 As shown, a micro-pressure oxygen-enriched chamber oxygen concentration monitoring system includes a current-type zirconia sensor 1 and a PLC controller 2. The current-type zirconia sensor 1 has several ventilation holes. The current-type zirconia sensor 1 is electrically connected to an oxygen concentration sensor probe 11. A power line and a signal line are connected between the current-type zirconia sensor 1 and the PLC controller 2.

[0040] The oxygen concentration monitoring in the micro-pressure oxygen-enriched chamber employs a current-type zirconia sensor 1, a sensitive and high-precision oxygen concentration detection technology. Its basic principle is as follows: in the zirconia electrolyte, the current carrier is oxygen ions. Therefore, when a voltage is applied to the zirconia electrolyzer, oxygen is drawn to the anode through the zirconia disc. If a perforated cover is added to the cathode of the electrolyzer, the rate at which oxygen flows to the cathode is limited. Due to this rate limitation, as the applied voltage gradually increases, the current in the electrolyzer will reach saturation. This saturation current is called the limiting current, and it is directly proportional to the oxygen concentration in the surrounding environment.

[0041] The current-type zirconia sensor 1 uses YSZ (yttrium-stabilized zirconia) solid electrolyte, with built-in porous platinum electrodes and a breathable membrane. The current-type zirconia sensor 1 has a working pressure range of 80-500 kPa and can withstand the extreme working conditions of a micro-pressure oxygen-enriched chamber.

[0042] The current-type zirconia sensor 1 boasts advantages such as long lifespan, high accuracy, and minimal impact from changes in cabin pressure, effectively addressing the issue of oxygen concentration monitoring in micro-pressure oxygen-enriched chambers. Specifically, the current-type zirconia sensor 1 offers a wide measurement range, capable of measuring oxygen concentrations from 10 ppm to 96% oxygen. It also features a long lifespan and minimal signal drift. Furthermore, the current-type zirconia sensor 1 operates within a wide pressure range of 80-500 kPa, meeting the operational requirements of micro-pressure oxygen-enriched chambers.

[0043] The current-type zirconia sensor 1 is electrically connected to a temperature sensor probe 12. The current-type zirconia sensor 1 is provided with a temperature adjustment component 14, which is electrically connected to the temperature sensor probe 12. The temperature adjustment component 14 includes a constant resistor.

[0044] The current-type zirconia sensor 1 in this application is less affected by ambient temperature. If the temperature deviation is within ±10℃, it can be ignored. If the temperature deviation is large, the temperature adjustment component 14 (constant resistor method) can be used to compensate for temperature changes and further reduce the influence of ambient temperature.

[0045] The current-type zirconia sensor 1 is electrically connected to the humidity sensor probe 13. The current-type zirconia sensor 1 is equipped with a heating element 15, which is electrically connected to the humidity sensor probe 13.

[0046] The current-type zirconia sensor 1 in this application is less affected by ambient humidity. The heating component 15 prevents condensation from forming on the sensor body, further reducing the impact of ambient humidity.

[0047] The PLC controller 2 is electrically connected to a control panel 21, an audible and visual alarm device 22, and a pressure compensation device 23. The pressure compensation device 23 includes a pressure balancing valve, which is located inside the chamber and is connected to the outside air.

[0048] The pressure compensation device 23 is equipped with an explosion-proof pressure balancing valve to dynamically adjust the pressure difference between the inside and outside of the chamber. The valve body is made of 316L stainless steel and can withstand the gas environment inside the chamber.

[0049] The implementation principle of the oxygen concentration monitoring system for a micro-pressure oxygen-enriched chamber according to this embodiment of the utility model is as follows:

[0050] The current-type zirconia sensor 1 operates based on the principle of oxygen concentration cell: under the drive of an applied voltage, oxygen diffuses through the permeable membrane to the cathode, and oxygen ions migrate in the electrolyte to form a current. The current intensity is linearly related to the oxygen concentration. The heating component 15 maintains the sensor at a constant temperature, eliminating the influence of temperature fluctuations on measurement accuracy. The pressure balancing device automatically compensates for changes in chamber pressure to ensure detection stability.

[0051] The oxygen concentration sensor probe 11 of the current-type zirconia sensor 1 is fixed to the inner wall of the oxygen-enriched chamber via a flange, and the explosion-proof junction box is placed outside the chamber. Before leaving the factory, the oxygen concentration-current response curve is established by standard gas calibration. When the detected value deviates from the preset threshold, the audible and visual alarm device 22 is triggered and the pressure compensation device 23 is linked.

[0052] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A micro-pressure oxygen-enriched chamber oxygen concentration monitoring system, characterized in that: It includes a current-type zirconia sensor (1) and a PLC controller (2). The current-type zirconia sensor (1) has several ventilation holes. The current-type zirconia sensor (1) is electrically connected to an oxygen concentration sensor probe (11). The current-type zirconia sensor (1) and the PLC controller (2) are connected by a power line and a signal line. The PLC controller (2) is electrically connected to a control panel (21).

2. The oxygen concentration monitoring system for a micro-pressure oxygen-enriched chamber according to claim 1, characterized in that: The current-type zirconia sensor (1) is electrically connected to a temperature sensor probe (12).

3. The oxygen concentration monitoring system for a micro-pressure oxygen-enriched chamber according to claim 2, characterized in that: The current-type zirconia sensor (1) is provided with a temperature adjustment component (14), which is electrically connected to the temperature sensor probe (12). The temperature adjustment component (14) includes a constant resistor.

4. The oxygen concentration monitoring system for a micro-pressure oxygen-enriched chamber according to claim 1, characterized in that: The current-type zirconia sensor (1) is electrically connected to a humidity sensor probe (13).

5. The oxygen concentration monitoring system for a micro-pressure oxygen-enriched chamber according to claim 4, characterized in that: The current-type zirconia sensor (1) is equipped with a heating component (15), which is electrically connected to the humidity sensor probe (13).

6. The oxygen concentration monitoring system for a micro-pressure oxygen-enriched chamber according to claim 1, characterized in that: The PLC controller (2) is electrically connected to an audible and visual alarm device (22).

7. The oxygen concentration monitoring system for a micro-pressure oxygen-enriched chamber according to claim 1, characterized in that: The PLC controller (2) is electrically connected to a pressure compensation device (23), which includes a pressure balancing valve. The pressure balancing valve is located inside the chamber and is connected to the outside air.

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