PROBLEM TO BE SOLVED: To provide an oxygen enrichment apparatus, wherein variation in supply amount or oxygen concentration of oxygen-enriched air is hardly caused even in case of variation in the ambient temperature.SOLUTION: The oxygen enrichment apparatus includes: an oxygen enriching means 1 having an oxygen enriching membrane 11 and forming oxygen-enriched air a supply port 2 supplying the oxygen-enriched air a pipe 3 connected to the oxygen enriching means 1, forming a flow path A leading the oxygen-enriched air formed in the oxygen enriching means 1 into the supply port 2 and a branched flow path B of the flow path A, the flow path B being provided with a flow resistance part 31 for increasing the flow resistance higher than that in the flow path A a vacuum pressure generation means 4 generating vacuum pressure by fluid flow, applying the vacuum pressure to the oxygen enriching means 1 and leading the oxygen-enriched air formed in the oxygen enriching means 1 to the supply port 2 via the pipe 3 a switching means 5 switching between the pipe 3 of the flow path A and branched flow path B and a detection means 6 detecting the pressure in the pipe 3 or the ambient temperature of the oxygen enriching means 1. The flow path of the pipe 3 is switched by the switching means 5 depending on the pressure or temperature detected by the detection means 6, to control the flow rate of the oxygen-enriched air supplied from the supply port 2.COPYRIGHT: (C)2010,JPO&INPIT【課題】周囲温度の変動があった場合でも、酸素富化空気の供給量や酸素濃度が変動しにくい酸素富化装置を提供する。【解決手段】酸素富化膜11を有し酸素富化空気を生成する酸素富化手段1と、酸素富化空気を供給する供給口2と、酸素富化手段1に接続され、酸素富化手段1で生成された酸素富化空気を供給口2に導入する流路A及びその分岐流路である流路Bを形成し、流路Bには上記流路Aより流動抵抗を高める流動抵抗部31が設けられる配管3と、液体流れにより真空圧を発生させ、その真空圧を酸素富化手段1に作用させて酸素富化手段1で生成された酸素富化空気を配管3を通して供給口2に導入する真空圧発生手段4と、前記配管3の流路Aと分岐流路Bを切り換える切換手段5と、配管3内の圧力又は酸素富化手段1の周囲温度を検知する検知手段6を備え、前記検知手段6で検知された圧力又は温度に応じて前記切換手段5により配管3の流路を切り換えて供給口2から供給される酸素富化空気の流量を制御する。【選択図】図1
