| 摘要 |
<p>The vacuum cleaner has a motor fan, which sucks air flow and supplies this air to a discharge circuit, which has a channel with longitudinally extended neckings (10a,10b) with constant air flow-passage cross section, which has an exhaust silencer. The discharge circuit has transition pieces (20a,20b), which is arranged between the longitudinally extended necking and the porous diffusor (30b). The transition piece has a diverging air flow-passing cross section.</p> |
