< Topic >The fact that the efficiency which concentrates oxygen deteriorates is prevented. SolutionsOxygen thickener 1, is provided in downstream of moisture removal mechanism 11a and the moisture removal mechanism, 11a which remove moisture the air AIR which is taken in from outside making the nitrogen which is included in the air AIR which was compressed with the compressor 12 which compresses the air AIR which is removed moisture with particular moisture removal mechanism 11a and compressor 11 the catalyst adsorb, the humidification mechanism 11b which before sending out oxygen OXY of the high density which is formed with the nitrogen adsorption mechanism 13 which forms the oxygen OXY of high density and nitrogen adsorption mechanism 13 to outside humidifies and, has. Moisture removal mechanism 11a and humidification mechanism 11b, oxygen OXY of the high density which is formed with air AIR and the nitrogen adsorption mechanism 13 which are taken in from outside and, between, have become united by the fact that it divides with the membrane 11c which possesses water permeability, the moisture of air AIR of moisture removal mechanism 11a, through membrane 11c, it makes the oxygen OXY of high density of humidification mechanism move 11b. < Selective figure >Figure 1【課題】酸素を濃縮する効率が悪化することを防止する。【解決手段】酸素濃縮装置1は、外部から取り込んだ空気AIRを除湿する除湿機構11aと、除湿機構11aの下流に設けられ、当該除湿機構11aで除湿された空気AIRを圧縮する圧縮機12と、圧縮機11で圧縮された空気AIRに含まれる窒素を触媒に吸着させて、高濃度の酸素OXYを生成する窒素吸着機構13と、窒素吸着機構13で生成された高濃度の酸素OXYを外部へ送り出す前に加湿する加湿機構11bと、を備えている。除湿機構11a及び加湿機構11bは、外部から取り込んだ空気AIRと、窒素吸着機構13で生成された高濃度の酸素OXYと、の間を、透水性を有する膜11cで仕切ることで一体となっており、除湿機構11aの空気AIRの水分を、膜11cを介して、加湿機構11bの高濃度の酸素OXYに移動させる。【選択図】図1
