Carrier Blackman & Associates, P.C.
Centrifugal fan
A centrifugal fan includes an impeller and a motor which rotates the impeller. The impeller includes an upper shroud, a lower shroud, and blades arranged therebetween. A rotor of the motor is attached to an attachment part of the lower shroud. In a section passing a rotary shaft of the impeller, the rotor and the attachment part are provided at a more outer side than a circle having a center on a line passing an upper end portion of an inlet opening at an inner side and parallel to the rotary shaft of the impeller, having a radius of 80% of a distance from the upper end portion of the inlet opening to a surface of the lower shroud below the upper end portion, and being tangent to the surface of the lower shroud or passing an end edge portion of the lower shroud.
Minebea Co., Ltd.
F F F F F F F
F04D F04D F04D F04D F04D F04D F04D
inventional inventional inventional inventional inventional inventional inventional
Masaki Seiya Yuzuru Takako
Ogushi Fujimoto Suzuki Otsuka