| 摘要 |
<p>In a propeller fan (1) according to the present invention, when coordinates in a cylindrical coordinate system having a z axis as a rotation axis of the propeller fan (1) are (r, ¸, z), a curved shape defined by prescribed r, ¸ and z coordinate values is determined as a base shape of a surface of a blade (3) of the propeller fan (1), and the surface of the blade (3) of the propeller fan (1) is configured by a curved surface obtained by enlarging or reducing the base shape in at least one of r, ¸ and z directions.</p> |
