DIAGONAL FLOW BLOWER IMPELLER AND AIR CONDITIONER

摘要

PROBLEM TO BE SOLVED: To provide a low noise diagonal flow blower impeller excellent in fan efficiency. SOLUTION: A leading edge 2 of an aerofoil 6 is formed by a concave curve to an upwind side in an outer circumference side of a section near a center point of a hub 4 and a tip 5 of the aerofoil 6 and by a convex curve in a hub 4 side of the section near the center point at a meridional plane. A section shape in a radial direction of the aerofoil 6 is formed by a concave curve to an upwind side in an outer circumference side of the section near the center point and by a convex curve in the hub 4 side of the section near the center point. A vertical hub 4b starting from a section near the minimum radius of a cone hub 4a and directly connecting in a direction roughly vertical to a pressure surface side of the aerofoil 6 is provided between the cone hub 4a directly connecting to a negative pressure surface side of the aerofoil 6, the cone hub 4a and the vertical hub 4b are continuously connected without a lacking part and a part in a downwind side of the vertical hub 4b is cut out with leaving a margin at step parts of the aerofoil 6, the cone hub 4a and the vertical hub 4b. COPYRIGHT: (C)2008,JPO&INPIT