PROBLEM TO BE SOLVED: To provide an oxygen concentrator capable of keeping electric power consumption low without deteriorating its therapeutic effect.SOLUTION: The pressure swing adsorption type oxygen concentrator to generate oxygen concentrated gas, at least comprises no less than an adsorption tube containing adsorption agent for adsorbing nitrogen rather than oxygen, a source air supply means for supplying the adsorption tube with source air, and a flow channel switching means for controlling gas volume flowing into or out of the adsorption tube. The oxygen concentrator includes an oxygen concentration measuring means 6 for measuring oxygen concentration in the oxygen concentrated gas, and a control means 9 for changing supply capacity of the source air supply means from a measured value at the oxygen concentration measuring means 6 so as to keep the measured value within the range of 85-91%.COPYRIGHT: (C)2007,JPO&INPIT【課題】治療効果を損なうことなく酸素濃縮装置の消費電力量を低く保つために酸素濃縮装置を提供する。【解決手段】少なくとも酸素より窒素を吸着する吸着剤を収容した1個以上の吸着筒、該吸着筒に原料空気を供給する原料空気供給手段、該吸着筒へのガスの出入りを制御する流路切り替え手段を備え酸素濃縮ガスを生成する圧力スイング吸着式酸素濃縮器において、酸素濃縮ガス中の酸素濃度を測定する酸素濃度測定手段6を有し、該酸素濃度測定手段の測定値に基づいて該原料空気供給手段の供給能力を変化させ、該酸素濃度測定手段の測定値が85%以上、91%以下に制御する制御手段9を有することを特徴とする圧力スイング吸着式酸素濃縮器。【選択図】図1
