Local oxygen supply method and oxygen enrichment effect in sleeping environment at high altitudes

The human body is in a low-level oxygenation state under hypoxic environment at high altitudes, and the resulting sleep disorders and other problems seriously affect health and work quality. Therefore, the study proposes a method of local diffuse oxygen supply. Through the method combined numerical simulation calculation with experimental verification, the dynamic change law of oxygen concentration in the inhaled area of human body under the condition of local oxygen supply is revealed, and the comfort level of local wind environment is analysed according to the index of carbon dioxide concentration and blowing sensation. The results show that the oxygen concentration attenuation from the oxygen supply port to the inhalation area is small, the oxygen enrichment effect is stable, and the oxygen jet effectively reduces the carbon dioxide concentration in the inhalation zone. When the outlet wind speed is in the range of 0.20 m/s to 0.30 m/s, the facial-area speed ratio is the highest, and the draft risk is less than 10%.