| 摘要 |
The ventilator comprises a suction pipe (1) which forks into two pipes (2), which open into a cone (4), after which a fan wheel (8) is arranged. The fan wheel is driven by a drive shaft (5) which passes through the cone (4) to the exterior in the region (7) between the pipes (2). The drive shaft is driven directly by a motor or through a belt or gear transmission. |
