PROBLEM TO BE SOLVED: To provide a function to announce a power failure alarm in an oxygen concentrator using a momentary switch as an operation switch.SOLUTION: An oxygen concentrator using a momentary switch as an operation switch includes an operation mode switching means to switch an operation mode by handling the momentary switch, an operation mode recording means to record an operation mode, a means to control the oxygen concentrator based on the recorded operation mode, a power failure alarm generation means, and a back-up power supply means, wherein the oxygen concentrator emits a power failure alarm by the power failure alarm generation means when power supply has stopped while the operation mode is ON, or when the power supply mode recorded by the operation mode recording means is switched to ON by the operation mode switching means while the power is not supplied.COPYRIGHT: (C)2014,JPO&INPIT【課題】モメンタリ式スイッチを運転スイッチとして利用した酸素濃縮装置における停電警報を発報する機能を提供する。【解決手段】モメンタリ式運転スイッチとして使用し、該運転スイッチの操作により運転状態の切り換えを行う運転状態切換手段、運転状態を記録する運転状態記録手段、記録された運転状態を元に濃縮器運転制御を行う手段、停電警報発生手段、およびバックアップ電源手段を有し、運転状態がONの時に電源供給が途絶えた場合、電源供給がない状態で該運転状態記録手段に記録された電源状態が該運転状態切換手段によりONに切り換った場合に、該警報発生手段により停電警報を発報する酸素濃縮装置。【選択図】図1
