PURPOSE: To provide a centrifugal blower used for an air conditioner or the like enabling the center-of-gravity position of an impeller to coincide with a rotational center position without fitting a balance weight or the like for adjusting the center-of-gravity position in addition to reducing the frequency expressed by the product of the number of blades and the rotational frequency of the impeller and the noise of the higher harmonic components.
CONSTITUTION: An impeller is formed of plural blades 9, a main plate 10 with the blades 9 fixed thereto, and a side plate fixed to the anti-main plate side end face of the blade 9. The blades 9 are installed at equal spaces apart. The main plate 10 is provided with plural motor cooling air holes 12, and the motor cooling air holes are disposed at nonuniform spaces apart.
| JPH0998918 | VACUUM CLEANER |
| JPS6237688 | HEAT EXCHANGE TYPE FAN |
KIDA TAKUMI
YABUSHITA AKIHIRO
