PROPELLER FAN

摘要

Provided is a propeller fan, including: a boss section including a tubular wall; and a plurality of blades extending in a radiate manner from an outer peripheral surface of the tubular wall of the boss section. Secondary flow control slits are each formed between a pair of the adjacent blades on the outer peripheral surface. The slit passes through the tubular wall to communicate between an inside of the boss section and an outside of the boss section. A downstream end of the tubular wall is closed, whereas an upstream end of the tubular wall is open. In side view, the slit extends obliquely to a rotation axis of the propeller fan, and extends obliquely in the same direction as a forming direction of a blade root portion of each of the plurality of blades.

主权项

1. A propeller fan, comprising:
a boss comprising a tubular wall; and a plurality of blades being provided on an outer peripheral surface of the tubular wall of the boss, wherein a slit is formed on the outer peripheral surface, wherein each of a plurality of the slits passes through the tubular wall to communicate between an inside of the boss and an outside of the boss, wherein a downstream end of the tubular wall is closed, whereas an upstream end of the tubular wall is open, and wherein, in side view, the each of the plurality of the slits extends obliquely in the same direction as a forming direction of a blade root of each of the plurality of blades.