| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an oxygen concentrator including a pressure adjustment mechanism for adjusting the pressure of gas to be discharged from the adsorption tower of a pressure change adsorption typr oxygen concentrator without using a mechanical adjustment valve, and for changing set pressure. <P>SOLUTION: This oxygen concentrator includes a pressure change adsorption type oxygen concentrating means having at least one adsorption tower filled with an adsorbent for selectively adsorbing nitrogen rather than oxygen and a compressor for supplying and/or pressure-reducing air to/from the adsorption tower; a flow rate control means for controlling the flow rate of oxygen gas concentrated by the oxygen concentrating means; and an open type supply means for introducing concentrated oxygen from the flow rate control means to a user. The concentrator also comprises a pressure measuring instrument which is arranged in the middle of a duct connecting the oxygen concentrating means to the flow rate control means; and a pressure control means for adjusting the period of the adsorption and desorption processes in the oxygen concentrating means, so as to control pressure on the upstream of the flow rate control means, based on information from the pressure measuring means. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
