| 摘要 |
The present invention provides a pressure swing adsorption-type oxygen concentrator for medical use having a flow channel switching device that successively pressurizes and supplies air from an air supply device at a constant timing to adsorb/desorb nitrogen in the air, wherein the flow channel switching device is a rotary distributor valve assembly structure provided with an electric motor, the rotary distributor valve assembly structure being provided with a shaft seal mechanism to perform shaft sealing with an O-ring having Shore A hardness of 45 to 60 degree and further the oxygen concentrator has a mechanism that simultaneously achieves rotary drive transmission following axial offset and angular offset of the rotary shaft of the rotary distributor valve assembly structure and shaft sealing. |
