| 摘要 |
The invention relates to a sound-insulated helicocentrifugal tan comprising a helicocentrifugal propeller (6) associated with a motor (5), housed in a casing formed by a central piece (1) and individual end pieces (2 and 3), which pieces are perforated with holes distributed over the entire surface except for the area around the propeller (6). In addition, a sound-absorbing blanket (8) is provided on the casing and an outer casing (7) is disposed around the entire assembly. |
