PROBLEM TO BE SOLVED: To provide an overheating detection unit capable of reducing a current supply amount to a temperature detection sensor, being mounted on an oxygen concentrator and being operated for a long period of time, and an oxygen concentrator.SOLUTION: The overheating detection unit includes a control part 450 for operating a closing structure part and shutting off the supply of oxygen when a temperature at an oxygen exit part obtained from a temperature detection sensor 453 is equal to or higher than a predetermined temperature. The control part 450 is provided with a switch 702 to be turned to an ON state so as to supply a current to the temperature detection sensor 453 during the operation of A/D converting a temperature detection signal from the temperature detection sensor 453, and to be turned to an OFF state so as not to supply the current to the temperature detection sensor at the time other than the time of the A/D converting operation.COPYRIGHT: (C)2012,JPO&INPIT【課題】温度検出センサに対する電流供給量を削減して、酸素濃縮装置に装着してより長い期間動作させることができる過熱検知ユニットおよび酸素濃縮装置を提供する。【解決手段】温度検出センサ453から得られる酸素出口部の温度が予め定めた温度以上であると、閉塞構造部を動作させて酸素の供給を遮断させる制御部450を有し、この制御部450は、温度検出センサ453からの温度検出信号をA/D変換する動作時に温度検出センサ453に電流を供給するためにオン状態になり、A/D変換する動作以外の時には温度検出センサには電流を供給しないようにオフ状態になるスイッチ702を有する。【選択図】図17
