To provide a centrifugal fan device increasing a flow rate into a centrifugal direction and improving gas quantity and static pressure by suppressing an airflow which is temporarily sucked from an intake port to the positive pressure surface side of a blade part and enters a negative pressure surface over the radial upper and lower end parts of the blade part, and electronics provided therewith.
This centrifugal fan device is provided with a fan casing, and a centrifugal fan 5 in which the shape on the positive pressure surface 13 side of the cylindrical cross section of the blade part 7 cut along a cylinder having a predetermined radius being coaxially with a rotary shaft is formed into a recessed shape with both side end parts positioned on a rotational direction side shown by an arrow R from a center part.
COPYRIGHT: (C)2007,JPO&INPIT
Hiroki Naito
Daisuke Nagano