| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a quiet oxygen concentrator having a small operation sound. SOLUTION: A housing for constituting a concentrator body 59 comprises a lower case 47 of a rectangular parallelepiped shape disposed at its bottom, an upper first case 49 disposed on an upper part of the case 47, and an upper second case 51 disposed adjacently to the case 49. These cases 47, 49 and 51 are combined by utilizing a wood base (wood piece compressed plywood) as a sound absorption material for an engaging structure of a dovetail groove with a protrusion to prevent an external leakage of a noise generated from each equipment as a sound source housed therein.</p> |
