| abstract |
An apparatus for producing an oxygen enriched gas having a compressor (4) for supplying air (A) under pressure, a unit (1, 2) for producing a gas enriched with oxygen from the air supplied from the compressor (4), a gas storage tank (3) for reserving the oxygen enriched gas produced from the producing unit (1, 2), a flow rate setting unit (31) to set a flow rate of the oxygen enriched gas (D) delivered from the gas storage tank (3), and a regulating unit (11-17) for adjustably regulating an oxygen concentration of the oxygen enriched gas in response to a change in a requirement of an oxygen concentration of the oxygen enriched gas (D) obtained at an outlet of the apparatus. |