发明公开

PROPELLER FAN
摘要:
A propeller fan (100) includes a boss (1) provided on a rotation axis, and a blade (2) provided at an outer circumferential portion of the boss (1). The blade (2) includes a leading edge (23) and a trailing edge (24). The blade (2) includes a first area (51), a second area (52) located inward of the first area (51), and third areas (53) located outward of the second area (52). The third areas (53) are located inward and outward of the first area (51), with the first area interposed between the third areas (53). Each of the first area (51), the second area (52) and the third areas (53) includes at least one notch (25A, 25B, 25C, 25D) formed in the trailing edge (24). The notches (25A, 25B, 25C, 25D) satisfy the relationship "P1 >P2 >P3", where P1 is the width of the at least one notch (25A) in the first area (51), P2 is the width of the at least one notch (25B) in the second area (52), and P3 is the width of the at least one notch (25C, 25D) in each of the third areas (53).
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