| 摘要 |
<p>PURPOSE:To stably obtain oxygen enriched gas having high or low concn. by introducing air into a tank for storing oxygen enriched gas discharged from an adsorption bed. CONSTITUTION:Air A compressed with a compressor 4 is introduced into an adsorption bed 1 or 2 through a cooler 5, a drain trap 6 and a three-way valve 9. After nitrogen is selectively adsorbed, the resulting oxygen enriched gas is sent to a storage tank 3 through a valve 12 or 13 and a check valve 14. Part of the air A compressed with the compressor 4 is introduced into the tank 3 through a flow rate regulating means 25 and a by-pass 24 to regulate the concn. of oxygen in the oxygen enriched gas in the tank 3 and the oxygen enriched gas is supplied to a user at a prescribed concn. and a prescribed flow rate through a filter 21, a flow rate setter 22 and a bubbler type humidifier 23.</p> |
