| 摘要 |
An extraction ventilator, particularly for a kitchen stove, comprising a ventilation duct (1) whose suction end is connected to the interior of a generally conical fume-collecting hood (2) whose open base faces downwards. The hood wall (21) can be deformed peripherally around the hood, and means (3, 4, 37, 38, 22, 23, 25) are provided for varying the hood periphery at the rim of the bottom opening of the hood. |
