PROBLEM TO BE SOLVED: To provide an oxygen concentrator quick to stabilize a concentration by following the change of absorption performance with respect to the change of working environment temperature in the oxygen concentrator.SOLUTION: The oxygen concentrator includes a purge process control means for storing device temperature during the operation of the oxygen concentrator and increasing/decreasing time for a purge process by changing the opening/closing timing of a flow passage switching means when the output value of a temperature sensor is out of predetermined temperature, and also a purge process control means for setting temperature thresholds that are different between the decrease direction and increase direction of the detection value of the temperature sensor concerning the temperature to change the opening/closing timing of the flow passage switching means.COPYRIGHT: (C)2013,JPO&INPIT【課題】酸素濃縮装置の使用環境温度の変化に対する吸着性能の変化に追従し、速やかに濃度安定する酸素濃縮装置を提供する。【解決手段】酸素濃縮装置の運転中に装置温度を記憶し、該温度センサの出力値が所定の温度を外れた場合、該流路切換手段の開閉タイミングを変えることによりパージ工程の時間を増減させるパージ工程制御手段を備え、該流路切換手段の開閉タイミングを変える温度を温度センサの検出値が低下する方向と上昇する方向で異なる温度閾値を設定するパージ工程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】図3
