PROBLEM TO BE SOLVED: To eliminate a measurement error due to pressure fluctuation in a differential pressure sensor device for detecting a respiratory phase and due to influence of outside air, in a respiration-synchronized oxygen supply apparatus .SOLUTION: A respiration-synchronized oxygen supply apparatus for separating oxygen in the air and supplying it in synchronization with respiration of a user includes an automatic on/off valve that supplies the oxygen on the basis of a result of respiration detection by a diaphragm type differential pressure sensor for detecting the respiration of the user. In the oxygen supply apparatus, an atmosphere release port of a substrate with a diaphragm inserted thereinto communicates with a small chamber integrated in a housing of the oxygen concentration apparatus and a housing wall of the small chamber has multiple air holes communicating with the outside.COPYRIGHT: (C)2014,JPO&INPIT【課題】呼吸同調酸素供給装置で、呼吸位相を検知する差圧センサの装置内での圧変動、外気の影響による測定誤差を解消する。【解決手段】空気中の酸素を分離し使用者の呼吸に同調して供給する呼吸同調酸素供給装置において、使用者の呼吸を検知するダイアフラム式の差圧センサの呼吸検知結果に基づいて酸素を供給する自動開閉弁を備え、ダイアフラムを挟む基板の大気開放ポートと酸素濃縮装置の筐体に一体化された小室と連通すると共に、該小室の筐体壁に外気に通じる複数の通気孔を備えることを特徴とする酸素供給装置。【選択図】図1
