Patent ID: 7018175

Claim:
An airflow guiding structure for a heat dissipation fan, comprising: a housing provided with an air inlet and an air outlet, and an annular wall between the air inlet and the air outlet; a base mounted in the air outlet for supporting a fan wheel which formed with a plurality of blades; at least one auxiliary air outlet formed in the annular wall of the housing proximate the air outlet; and a plurality of guiding members arranged in the air outlet and inclined with respect to an axis of the housing, the auxiliary air outlet being adjacent to at least one of the guiding members, said at least one of said guiding members guiding air to said auxiliary air outlet; wherein when the fan wheel rotates, the guiding members deflect airflow in at least two airflow directions, including at least a first airflow direction at the air outlet and at least a second airflow direction at the auxiliary air outlet.