Miniature electric heat extraction fan e.g. for notebook computer, has flat housing containing fan wheel with fan blades projecting into central air intake provided by housing cover plate

摘要

The fan has a flat housing (100) with a central chamber (101) receiving a fan wheel (120) enclosed by a cover plate (130) fitted to the housing, provided with a central air inlet (131), with an air outlet (103) at the chamber peripheral edge. The fan wheel has a stator insert (110) fitted to a shaft sleeve (102) projecting from the housing base, with a central shaft rotating within the shaft sleeve and a number of peripheral fan blades (122), each having an upper section partially projecting into the air inlet. An Independent claim for a cover plate for a miniature heat extraction fan is also included.