| 摘要 |
PROBLEM TO BE SOLVED: To provide an oxygen concentrator of a pressure swing adsorption type which efficiently obtains silencing effect without causing complexity of upsizing and structure of a sound-absorbing box for various noise such as exhaust noise as a gas passage positioned next to an exhausting outlet for venting air and nitrogen to cool air. SOLUTION: A gas inlet port 106a for the gas to be exhausted is provided on a ceiling board 106 of sound-absorbing box 105, and a gas exhausting port 112 for exhausting gas outside is provided on a floor board 111. In the sound-absorbing box 105, near the gas inlet port 106a, between the gas inlet port 106a and gas exhausting port 112, a partition wall 115 is arranged for preventing the gas flowed into the sound-absorbing box 105 from being directed to the gas exhausting port 112. This partition wall 115 is equipped with guide wall parts 115b on both the sides. By this guide wall parts, after having passed to the opposite side, on the plan view, of the gas exhausting port 112, the gas is branched into both sides of partition wall 115 and so guided to turn around and directed to the gas exhausting port 112. COPYRIGHT: (C)2006,JPO&NCIPI
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