| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a means for detecting clogging of the air intake of an oxygen concentrator with a simple method. SOLUTION: In this oxygen concentrator, a thin hole part for passing external air is provided on the outer part of a casing on an air inflow route for supplying the air of raw materials from the air intake which is equipped with a dust filter, of the oxygen concentrator to an oxygen concentrating means.</p> |
