| 摘要 |
A propeller fan with two blades includes a blade (21 A) and a blade (21 B), and a connection portion (31) connecting the blades together. Each blade has a peripheral edge portion (21a) extending in an arc having a diameter D with a center axis (101) as a center thereof, a front edge portion (21 b) arranged on a forward side in a rotational direction, a rear edge portion (21 c) arranged on an opposite side in the rotational direction, and a leading blade edge portion (21d) connecting the front edge portion (21 b) and the peripheral edge portion (21a). A plane which includes each intersection (21e) between the rear edge portion (21 c) and the peripheral edge portion (21a) and is perpendicular to the center axis (101) is defined as ³. When the propeller fan is viewed in a direction parallel to a plane including the leading blade edge portions (21d) and the center axis (101), a distance H between plane ³ and a connected portion between the front edge portion (2 1 b) of the blade (21 A) and the rear edge portion (2 1 c) of the blade (21B), on a line of the center axis (101), satisfies 0.028 ‰¤ H/D ‰¤ 0.056. With such a structure, a propeller fan, a molding die, and a fluid feeder which make a significant contribution in terms of energy-saving properties and resource-saving design can be provided. |
