Heat-dissipating module, fan structure and impeller thereof

摘要

A heat-dissipating module, a fan structure and an impeller. The heat-dissipating module comprises a fan structure providing the impeller to expel heat from a heat source. The impeller comprises a main body and a plurality of blade units. The main body has abase surface, and the blade units extending from the base surface of the main body. Each blade unit comprises a blade surface and a plurality of guiding portions disposed on the blade surface. The pattern of the guiding portions can be linear, curved, parallel or symmetrical, indented on or protruded from the blade units.