| 摘要 |
A vacuum cleaner device containing a water filter and a filter shroud. The filter shroud contains an outer wall having a gap for the passage of water and air, an inner wall placed near the gap and coaxial with the outer wall, and a dry filter at the top of the device. Contaminated air enters the filter shroud near the center of the inner wall. Most of the contaminants are filtered out of the air by the water. The air passes along the inner wall, through a channel between the inner and outer walls, through the gap in the outer wall, and up through the dry filter. The air reaching the dry filter has lost all of the water and most of the contaminants. The configuration of the filter shroud prevents the dry filter from becoming wet and losing its effectiveness.
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