| 摘要 |
<p>A swirl-type local ventilation apparatus comprising a swirler is disclosed. The disclosed swirl-type local ventilation apparatus comprises: a swirler which is provided on a suction end of a vent pipe and generates swirls by rotating; and a driving unit which is provided in the vent pipe, and which rotates the swirler in connection with the swirler. The swirler comprises: a recessed groove-shaped hood member which has a disk shape, and in which an air inlet side has a flat portion in a central area and inclined portions in outer edge areas; a plurality of lower wings which are provided to come into close contact with the inclined portions of the air inlet side of the hood member, and which form swirls by rotating with the hood member; a plurality of upper wings which are provided on the opposite surface of a vent pipe of the hood member, and which form horizontal air flows or air flows downwardly inclined from the horizontal state; and a guide member which is spaced from the opposing surface of the vent pipe of the hood member and covers the plurality of upper wings, and which guides the air flows formed by the plurality of upper wings by forming an air flow passage between the guide member and the opposing surface of the vent pipe of the hood member.</p> |
