| 摘要 |
<p>An air filter unit (100) includes a flexible shaft (8) in which an upper end part thereof is connected at an air-volume-regulating damper (9) of the air filter unit (100), an outer cover (11) attached by mating with a through-hole (10) in a filter frame (4) for supporting an air filter, an operating shaft (13) rotatably disposed in the outer cover (11), and a shaft joint (14) for connecting an upper end part of the operating shaft (13) and a lower end part of a flexible shaft. A first sealing member (12) for maintaining airtightness is provided between the outer cover (11) and the through-hole (10) in the filter frame (4). A second sealing member (21) for maintaining airtightness is provided between the flexible shaft (8) and the top of the outer cover (11). A plug (22) is detachably attached to the bottom of the outer cover (11). Consequently, an upper space (upstream space of air filter) of the air filter inside an air filter box is airtight with respect to the internal side (downstream space of air filter) of the air filter box.</p> |
