| 摘要 |
The invention relates to an impeller device (10) for centrifugal fans (1), comprising a centre wheel (40), at least one side disc (20, 30) and fan blades (50). The invention is characterised in that the centre wheel (40) and the side disc(s) (20, 30) are equipped with attachment devices (24, 44) for attaching the blades and the centre wheel's (40) attachment device (44) comprises a protrusion (45) extending substantially in the centre wheel's radial direction and arranged to abut against the second side end (54) in the fan blades (50). |
