| 摘要 |
PROBLEM TO BE SOLVED: To provide a fan for an automotive heat exchanger which is reduced in power consumption without reduction in air volume.SOLUTION: A line D connecting a radial tip point B of a front edge 3 of a blade 2 to a root point A of the front edge 3 of the blade 2 is located forward in the rotating direction rather than a line E connecting the root point A of the front edge 3 of the blade 2 to a center point O of a boss 1, and an angle formed of both the lines D, E is in a range of 10-25°. Furthermore, the front edge 3 is formed in a circular shape so that the radial center is protruded toward the rotating direction, and the ratio of its curvature radius R to a fan diameter Dthat is the diameter of the fan, R/D, is 0.18-0.42. |
