PROBLEM TO BE SOLVED: To provide a technique for preventing the occurrence of noises and vibrations when a pressure swing adsorption oxygen concentrator stops operation.SOLUTION: The pressure swing adsorption oxygen concentrator 1 includes a plurality of adsorption pipes 105a, 105b charged with an adsorption agent to selectively adsorb nitrogen rather than oxygen, a compressor 103 for supplying the adsorption pipes with pressurized air, and passage switch means 104a, 104b for sequentially switching passages between the compresser and the adsorption pipes and repeating the adsorption step of supplying the adsorption pipes with pressurized air and extract concentrated oxygen from them and the desorption process of decompressing and regenerating the adsorption agent in each adsorption pipe, at a predetermined time interval. The oxygen concentrator 1 includes stop control means 401 to control to switch the passage switch means in order to normalize the inner pressure of the adsorption pipes when the oxygen concentrator stops operation, and has means for controlling to stop the driving of the compressor when the inner pressure of adsorption pipes is below a prescribed pressure level after receiving a concentrator stop command signal.COPYRIGHT: (C)2009,JPO&INPIT【課題】圧力変動吸着型酸素濃縮器の装置停止時の騒音、振動を防止する技術を提供する。【解決手段】酸素よりも窒素を選択的に吸着し得る吸着剤を充填した複数の吸着筒105a、105b、該吸着筒へ加圧空気を供給するコンプレッサ103、該コンプレッサと各吸着筒間の流路を順次切り換え、各吸着筒へ加圧空気を供給し濃縮酸素を取り出す吸着工程、各吸着筒を減圧し吸着剤を再生する脱着工程を所定タイミングで繰り返すための流路切換手段104a、104bを具備した圧力変動吸着型酸素濃縮装置1において、装置停止時に該吸着筒の内圧を常圧にする該流路切換手段の切り換え制御を行なう停止制御手段401を備え、装置停止指令信号を受信した後、該吸着筒内圧が所定圧以下の時点で該コンプレッサの駆動を停止する制御を行なう手段を有する。【選択図】図1
