Propeller fan and outdoor unit for air-conditioning apparatus
A propeller fan is provided with a shaft portion and a blade, wherein the blade includes: a root portion which is connected to the shaft portion; a first part which is positioned at the root portion or on the outer peripheral side of the root portion, and which has a distance r1 from a rotation axis...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | A propeller fan is provided with a shaft portion and a blade, wherein the blade includes: a root portion which is connected to the shaft portion; a first part which is positioned at the root portion or on the outer peripheral side of the root portion, and which has a distance r1 from a rotation axis; a second part which has a distance r2 from the rotation axis that is longer than r1; a third part which has a distance r3 from the rotation axis that is not less than r2; and a tip portion which is positioned at an outer peripheral end of the blade and which has a distance rt from the rotation axis that is longer than r3. The blade satisfies the relationship (θ2-θ1)/(r2-r1) > (θt-θ3)/(rt-r3) ≥ 0 where θ1 is the camber angle of the blade in the first part; θ2 is the camber angle of the blade in the second part; θ3 is the camber angle of the blade in the third part; and θt is the camber angle of the blade in the tip portion. |
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