| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain an oxygen enriched-gas having a stable concentration by controlling the temperature of an adsorbing bed by detecting the temperature of the absorbing bed to prevent the decrease of the recovery rate caused by the decrease of the absorbed amount caused by the temperature change and the decrease of a volume concentration of the oxygen in the generated oxygen enriched gas. SOLUTION: Air supplied from an air-supplying means 1 is send to at least one absorbing bed 2 packed with an adsorbing agent capable of more selectively adsorbing nitrogen than oxygen. The formed oxygen-enriched air is controlled so as to have a proper flow rate through a control valve 5 and a flow rate setter 6, and thereafter humidified by a humidifier. The humidified oxygen-enriched air is supplied to a patient. The temperature of the adsorbing bed 2 is detected by a temperature-detecting means 9, and the temperature of the adsorbing bed 2 is controlled preferably so as to be 20-60 deg.C, more preferably 40±5 deg.C according to the detected result by blowing a waste hot air blasted by a blower 8 for cooling the air-supplying means 1 to the surface of the adsorbing bed 2. As a result, the oxygen-enriched gas having a constant concentration over a year is provided without being affected by the environmental temperature.</p> |
