Full
Outline
To address the challenges of insufficient mobility of traditional stationary oxygen stations and the limited operational duration of portable equipment such as carbon fiber oxygen cylinders and oxygen bags in high-altitude areas, a novel emergency air respirators was developed. The apparatus adopted intelligent mixed oxygen supply technology and integrated a spiral oxygen-nitrogen separator. It effectively reduced the overall volume while improving the gas separation efficiency, achieved highly efficient oxygen-nitrogen separation, and continuously and stably provided breathing gas with an oxygen concentration of 21%. Tailored for complex operating conditions such as low pressure and low temperature in high-altitude regions, the system overcame the shortcoming of insufficient operational duration of traditional equipment through integrated and optimized design. The test results indicate that under the high-altitude condition of 5 445 m, after adopting the novel emergency air respirators, the blood oxygen saturation of users increases from a dangerous level of approximately 68% to a relatively safe level of 92%. The maximum battery duration reaches (296±6) min (altitude -154 m), and the apparatus possesses advantages such as high oxygen production efficiency, rapid response, easy operation, as well as safety and energy conservation. The research results provide a more reliable safety guarantee for emergency rescue and underground operations in high-altitude mining areas.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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