PROBLEM TO BE SOLVED: To provide an oxygen enriching device capable of restraining a load of a compressor at the time when the device stops, capable of restraining a noise and vibration from being generated, capable of restraining therein an adsorbent from being deteriorated with moisture adsorption after the device stops, and provided thereby with a function for discharging surely, to an outside, adsorbed water staying in a piping system and dew-condensed water in a pipe.SOLUTION: This oxygen enriching device carries out sequentially controls of (1) executing an operation at a regular sequence until finishing a purge generation process or until finishing a purge exhaustion process, when recognizing an operation stop signal of the device, (2) operating the compressor 102 under the condition where closing an equalizer valve 107, where opening supply valves 104a, 104b and exhaust valves 104c, 104d of purge generation process side adsorption cylinders 105a, 105b, and where closing supply valves 104a, 104b of purge exhaustion process side adsorption cylinders 105a, 105b and opening exhaust valves 104c, 104d thereof, and (3) stopping the compressor 102 under the condition where opening all of the supply valves 104a, 104b and the exhaust valves 104c, 104d.COPYRIGHT: (C)2011,JPO&INPIT【課題】装置停止時のコンプレッサの負荷を抑え、騒音や振動の発生を抑えると共に、装置停止後における吸着剤の吸湿劣化を抑えため、配管系に溜まった吸着水及び配管中の結露水を系外に確実に排出する機能を備えた酸素濃縮装置を提供する。【解決手段】装置の運転停止信号を認識すると、(1)パージ生成工程の終了時またはパージ排気工程の終了時まで定常シーケンスで運転し、(2)均圧弁107を閉じると共に、パージ生成工程側吸着筒105a、105bの供給弁104a、104b及び排気弁104c、104dを開き、且つパージ排気工程側吸着筒105a、105bの供給弁104a、104bは閉じ且つ排気弁104c、104dは開いた状態で該コンプレッサ102を運転し、(3)供給弁104a、104b及び排気弁104c、104dを全て開いた状態で該コンプレッサ102を停止する制御を順次行う。【選択図】図1
