PROBLEM TO BE SOLVED: To provide an oxygen concentrator capable of quickly raising oxygen concentration without changing gas volume from its compressor.SOLUTION: The oxygen concentrator, which is constituted of an adsorption bed filled with an adsorbent that selectively adsorbs nitrogen relative to oxygen, a pressurized-air feeder for feeding pressurized air to the adsorption bed, a product tank for storing oxygen gas thus prepared, and a flow control valve for controlling the flow rate of oxygen gas being supplied to a user, and adsorbs away nitrogen in ambient air and supplies un-adsorbed oxygen to a user at a selected set flow-rate, is characterized by further comprising a controlling means that causes the pressurized-air feeder to feed pressurized air to the adsorption bed at a flow rate set to cause oxygen gas to flow at a selected set flow-rate, and causes the flow control valve to fully open or causes the same to allow oxygen gas to flow at the maximum set-flow rate of the apparatus, upon starting the apparatus.COPYRIGHT: (C)2009,JPO&INPIT【課題】コンプレッサ風量を変更することなく、酸素濃度を短時間に立ち上げる装置を提供する。【解決手段】酸素よりも窒素を選択的に吸着する吸着剤を充填した吸着床と、該吸着床に加圧空気を供給する加圧空気供給手段、生成した酸素ガスを貯留する製品タンク、供給する酸素ガスの流量を制御する流量制御弁を備え、原料空気中の窒素を吸着除去し、未吸着の酸素ガスを選択された設定流量で供給する酸素濃縮装置において、該装置の起動時に、該加圧空気供給手段を選択された設定流量で酸素ガスを供給するために設定された供給風量とすると共に、該流量制御弁を全開または該装置の最大設定流量とする制御手段を備えることを特徴とする酸素濃縮装置。【選択図】なし
