PROBLEM TO BE SOLVED: To provide an oxygen concentrator which can supply stable raw material air to an absorption unit immediately after start-up, even when started-up at low rotation.SOLUTION: The oxygen concentrator is provided with a compressed air generator 105, which builds in a rotation body and generates compressed air, and a suction unit, which introduces the compressed air to an inner section and, by means of an adsorbent filled into the inner section, absorbs nitrogen and separates and produces oxygen. The compressed air generator has a control unit 200 which controls the rotational frequency of the rotation body such that the rotational frequency is appropriate with regard to the amount of oxygen being generated. When the device starts up, the control unit drives the rotational frequency of the rotation body at a higher rotational frequency than that previously determined.COPYRIGHT: (C)2011,JPO&INPIT【課題】低回転領域で起動した場合にも起動直後から安定した原料空気を吸着部に供給することができる酸素濃縮装置を提供すること。【解決手段】回転体を内蔵して圧縮空気を発生する圧縮空気発生部105と、前記圧縮空気を内部に導入して該内部に充填された吸着剤により窒素を吸着して酸素を分離生成する吸着部とを備える酸素濃縮装置において、前記圧縮空気発生部は、生成する前記酸素流量に応じて前記回転体の回転数が適切な回転数となるように制御する制御部200を有しており、該制御部は、装置起動時に前記回転体の回転数を前記決められた回転数よりも高い回転数で駆動する構成とした。【選択図】図5
