| 摘要 |
PROBLEM TO BE SOLVED: To provide an oxygen enricher with a large flow, with low vibration and low noise. SOLUTION: The oxygen enricher comprises a vacuum pump 5, an outlet 6 for letting out oxygen enriched air to the outside, and a plurality of spring members 31 and 32 for holding the vacuum pump 5. The vacuum pump 5 is connected to the downstream side of an oxygen enriching membrane unit 35 for generating oxygen enriched air with a high oxygen concentration, and sucks air around the oxygen enriching membrane unit 35 into the oxygen enriching membrane unit 35. The spring members 31 and 32 are disposed on the piston side and the counter-piston side of the vacuum pump 5 respectively between the vacuum pump 5 and a body housing 42. The spring constant of the spring member 32 disposed on the piston side of the vacuum pump 5 is different from the spring constant of the spring member 31 disposed on the counter-piston side, and therefore, the vibration on the whole body and the noise can be efficiently reduced, for example, by disposing the spring member 32 with a large spring constant on the piston side where the amplitude is large and disposing the spring member 31 with a small spring constant on the counter-piston side where the amplitude is small. COPYRIGHT: (C)2006,JPO&NCIPI
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