The exhaust gas removal system of the hyperbaric oxygen double chamber utilizes a multi-faceted design to mitigate the risk of oxygen enrichment. Its core mechanisms focus on gas exchange efficiency, dynamic monitoring, and emergency control, ensuring that the oxygen concentration within the chamber remains within safe thresholds. The safety of this system relies not only on hardware configuration but also forms a closed loop with operational procedures and environmental management, collectively creating a safe barrier for hyperbaric oxygen therapy.
For gas exchange, the hyperbaric oxygen double chamber uses compressed air as the primary medium to regulate the chamber environment. When the patient inhales pure oxygen, the oxygen concentration within the chamber gradually increases due to respiration. The exhaust gas removal system continuously infuses mechanically compressed, separated, and purified compressed air to promote air circulation within the chamber. During this process, fresh air enters through inlets on the bottom or side walls of the chamber, creating a stable airflow layer. Exhaled gas (containing high concentrations of oxygen and carbon dioxide) is discharged from the top or opposite exhaust ports. By controlling the ratio of intake and exhaust flow rates, the system rapidly dilutes the oxygen within the chamber, preventing the formation of localized oxygen-rich zones. For example, during the pressurization phase, the continuous injection of compressed air effectively balances oxygen concentration fluctuations caused by the chamber's tightness. During the decompression phase, the precise opening of the exhaust valve prevents concentration spikes caused by gas entrapment.
Dynamic monitoring is another key component of the exhaust emission system. The hyperbaric oxygen double chamber is equipped with a high-precision oxygen meter that collects real-time oxygen concentration data within the chamber. This data is linked to the exhaust and intake valves through a control system. When the oxygen concentration approaches the safety limit (typically 23%), the system automatically increases the exhaust flow while reducing the supply of pure oxygen, forming a negative feedback regulation mechanism. Furthermore, a pressure sensor is installed within the chamber to monitor pressure changes during the gas replacement process, ensuring that the chamber structure is not affected during oxygen concentration adjustments. This "monitor-judgment-act" closed-loop control system enables the exhaust emission system to adjust its operating mode in real time based on the chamber's environment, preventing excessive oxygen concentrations due to delayed response.
The emergency control mechanism provides dual protection for the exhaust emission system. During normal operation, if the oximeter detects an abnormally elevated oxygen concentration, the system immediately triggers a three-level response: the first response is an audible and visual alarm, prompting cabin operators to intervene; the second response automatically activates the backup exhaust channel to increase exhaust efficiency; and the third response is emergency decompression, rapidly reducing cabin pressure and diluting the oxygen concentration through the cabin's emergency exhaust system. Furthermore, a manual exhaust valve is provided within the cabin, allowing operators to directly operate it in the event of a system failure, ensuring timely emergency response. These features ensure that the exhaust system maintains controllable oxygen concentrations in the event of an emergency.
From an operational perspective, the safety of the exhaust system is also reflected in the standardized management of the entire treatment process. For example, before patients enter the cabin, their clothing is strictly checked to ensure it is made of pure cotton to prevent sparks caused by static electricity. During treatment, patients are prohibited from removing or putting on clothing or rubbing their bodies to minimize the risk of elevated oxygen concentrations. Furthermore, cabin operators regularly inspect the cabin environment, observe changes in oximeter data, and adjust oxygen supply parameters based on patient responses. This dual control of "hardware + process" further reduces the risk of oxygen enrichment.
The exhaust gas emission system of the hyperbaric oxygen double chamber builds a multi-level safety protection system through the dynamic balance of gas replacement, precise feedback of real-time monitoring, rapid response of emergency control and standardized management of operating procedures.
