To provide a PSA type oxygen concentration apparatus capable of acquiring respiration information while distinguishing between pressure fluctuation caused when forming concentrated oxygen gas and respiratory pressure.SOLUTION: A PSA type oxygen concentration apparatus includes an oxygen generation part 11 equipped with a cylinder 113 for generating concentrated oxygen gas and a pressure regulating valve 116 for regulating the pressure of the concentrated oxygen gas supplied from the cylinder, an oxygen flow rate control part 12 having a flow meter 122 and a control valve 121, and an oxygen supply port 13 for supplying the generated oxygen gas outside the apparatus. It also includes pressure adjusting means 14 for adjusting at least one of first average pressure and second average pressure so that a pressure difference between the first average pressure between the flow meter and the control valve, and the second average pressure at the oxygen supply port falls within a predetermined range, pressure comparing means 15 for calculating a difference between the first average pressure and the second average pressure after the adjustment by the pressure adjusting means, and respiration information calculation means for calculating respiration information from the difference.SELECTED DRAWING: Figure 2【課題】濃縮酸素ガス生成時に生じる圧力変動と呼吸圧力とを区別して呼吸情報を取得することができるPSA式酸素濃縮装置を提供する。【解決手段】濃縮酸素ガスを生成するシリンダー113と、シリンダーから供給する濃縮酸素ガスの圧力を調圧する調圧弁116とを備えた酸素生成部11と、流量計122と、コントロールバルブ121とを有する酸素流量制御部12と、生成した酸素ガスを装置外に供給する酸素供給口13とを備えるPSA式酸素濃縮装置において、流量計とコントロールバルブとの間の第1平均圧力と、酸素供給口の第2平均圧力と、の圧力差が所定範囲内となるように、第1平均圧力と第2平均圧力の少なくとも一方を調整する圧力調整手段14と、圧力調整手段で調整された後に、第1平均圧力と第2平均圧力との差分をとる圧力比較手段15と、差分から呼吸情報を算出する呼吸情報算出手段と、を備えるPSA式酸素濃縮装置。【選択図】図2
