Patent ID: 6416288
Filing Date: 2002-07-09
Classification: F04D,Y10S

Abstract:
An axial-flow fan including a hub coupled to a rotating shaft and integral with the rotating shaft, and blades arranged around the outer peripheral surface of the hub and integral with the hub, comprising, as design parameters thereof:an outer fan diameter of 110 mmÂ±10 mm; an inner/outer diameter ratio of 0.30 to 0.38, the inner/outer diameter ratio corresponding to a ratio of an outer hub diameter to the outer fan diameter; a number of the blades corresponding to five or more; a maximum camber ratio ranging from a value of 10.2 to 11.2% at an outer tip of each of the blades to a value of 4.2 to 5.2% at an inner tip of each of the blades; a maximum camber position defined at a point spaced apart from leading and trailing edges of each of the blades by a distance of 0.5Â±0.1 when the distance between the leading and trailing edges is defined to be 1; a pitch angle ranging from an angle of 30Â°Â±2Â° at the outer blade tip to an angle of 43Â°Â±2Â° at the inner blade tip; a rake angle ranging from 5.5Â° to 5.9Â°; and a sweep angle varying in a radial direction of the fan.