| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an oxygen concentrator of a pressure swing adsorption type which has a check valve halfway in a high oxygen concentration gas transfer pipe for supplying high oxygen concentration gas to a product tank, a connecting pipe for connecting the transfer pipes at positions between nitrogen absorption containers and the check valves, and a purge valve halfway in the connecting pipe for discharging nitrogen from the nitrogen absorbing containers, prevents generation of chattering sounds at the check valves, and achieves shortening and downsizing of the transfer pipes. <P>SOLUTION: Electromagnetic valves are used as the check valves 161 and 162 so that opening and closing of the check valves are controlled. With such a configuration, opening and closing of the check valves are not affected by gas pressure within the pipes and generation of chattering sounds is thus prevented. A part M of each transfer pipe is arranged within a manifold block. By doing so, shortening and downsizing of the transfer pipes are achieved. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
