| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a turbo fan which has high reliability in strength and can reduce noise, and in which a main shroud and blades are integrally formed with a thermosetting resin. <P>SOLUTION: The turbo fan includes: the disk-like main shroud 2; a hub 2a for installing a motor in a space formed in such a way that the center part of the main shroud 2 is projected in a direction of a rotating axis; the plurality of blades 3 having a base part formed on the flat plate part of the outer peripheral side of the main shroud 2 and vertically arranged in the projecting direction of the hub 2a; and a plurality of motor cooling holes 5 provided in the hub 2a and communicating to the space in which the motor is arranged. The thermosetting resin is poured into a plurality of hub runners 9a radially provided in the hub 2a, so that the hub 2a is formed. The motor cooling holes 5 are so arranged as to avoid resin converging parts A formed between the adjacent hub runners 9a. <P>COPYRIGHT: (C)2010,JPO&INPIT |
