Heat-dissipating device e.g. high-pressure centrifugal fan, has rotor with base and hub, and blades disposed around hub and base, where blades are alternately arranged and shaped as curved or airfoil structures

摘要

The device has housing with an opening, and a rotor disposed in the housing, where the rotor has a base and a hub. A set of blades (253) are disposed around the hub. Another set of blades (254) are disposed on the base, and the blades (253) extend downward from a periphery of the hub to a surface of the base. The blades (253, 254) are alternately arranged and shaped as curved or airfoil structures.