Integrated fan cooling system for circuit board has aerodynamically-shaped fan blades drawing air in axially and passing it over disk-shaped circuit board with central aperture for fan shaft

摘要

The fan assembly (1) has a square housing (11) with a circular shroud surrounding the fan blades (132). The fan (13) may be made in one piece has a cylindrical hub (131) which may act as an electric motor rotor surrounding a stator mounted on a stationary shaft. The circuit board is shaped as a flat circular ring which fits round the stationary shaft.