| 摘要 |
An impeller (1) of blower comprises several vanes (2) mounted between an upper edge board (4) and a lower edge board (5) of the impeller. The vane (2) has at least one concave pressing rib (21) along its transverse. The concave pressing rib (21) has a through hole (22) at its end which is near the end of the vane (2). When the impeller (1) of blower operates, part of air at the front surface of the vane (2) flows through the through hole (22) at the end of the concave pressing rib (21) to the rear surface of the vane (2) along the direction of the concave pressing rib (21). The pressure at the front surface and the rear surface of the vane (2) can be balanced to reduce the resistance of the air and to increase the amount of ventilation. Therefore the efficiency is increased. |
