Blower device

Abstract

R indicates an outer diameter of s fan, r indicates an outer diameter of an outer rotor, D indicates an inner diameter of an air inlet, d indicates an outer diameter of a hub, H indicates a maximum height of blades from a second surface of a main plate opposite to a first surface in a direction of an axis of a rotatable shaft, h indicates a maximum height of the hub from the second surface of the main plate in the direction of the axis of the rotatable shaft, and (r/R)≥0.35, 0<(d/D)<0.5, and 0<(h/H)<0.5 are satisfied.

What is claimed is: 
     
         1 . A blower device comprising:
 a fan;   a case housing the fan for rotation; and   a motor of an outer rotor type fixed to an outer surface of the case and rotating the fan,   wherein   the motor includes:
 an outer rotor; and 
 a rotatable shaft rotating together with the outer rotor, 
   the fan includes:
 a hub fixed to the rotatable shaft; 
 a main plate rotating together with the hub; and 
 blades provided on a first surface of the main plate and provided radially about the hub, 
   the case includes an air inlet through which air is introduced into the case from an outside by rotation of the fan and through which an axis of the rotatable shaft passes through,   R indicates an outer diameter of the fan,   r indicates an outer diameter of the outer rotor,   D indicates an inner diameter of the air inlet,   d indicates an outer diameter of the hub,   H indicates a maximum height of the blades from a second surface of the main plate opposite to the first surface in a direction of the axis of the rotatable shaft,   h indicates a maximum height of the hub from the second surface of the main plate in the direction of the axis of the rotatable shaft, and
   ( r/R )≥0.35,
 
   0<( d/D )<0.5, and 
   0<( h/H )<0.5 
   
       are satisfied.