| 摘要 |
<p>This unit includes a two-piece, cylindrical canister partitioned intermediate ends into upper and lower chambers connected by a hole in the center of the partition. A filter cartridge in the upper chamber has an axial bore closed at its lower end and connected at its upper end to the inlet of a vacuum motor, which is mounted on the upper end of the canister. A dust inlet in the lower chamber is connected to a nipple or duct which is inclined transverse to the canister axis and a line radially thereof. When the motor is operated smoke and spatter sparks enter the lower chamber nearly tangentially and are swirled therein so that heavy particles and sparks are flung by centrifugal forces against the chamber wall and drop harmlessly to the canister bottom. Lighter particles rise to the upper chamber and are filtered out by the cartridge as the air passes radially therethrough to the vacuum motor.</p> |
