Patent ID: 7417856
Filing Date: 2008-08-26
Classification: F04D,H05K

Abstract:
1. A flow direction controlling structure for a heat dissipation module, the heat dissipation module having a housing with an outlet, a first impeller and a second impeller, both of the first impeller and the second impeller being disposed within the housing, the flow direction controlling structure comprising: a rotatable element disposed within the housing and between the first impeller and the second impeller so as to divide the outlet into a first outlet and a second outlet, and having a fixed end and a correspondingly movable end; and a limiting element for limiting the movable end of the rotatable element from deflecting to the first impeller or the second impeller when the first impeller and the second impeller are in operation; wherein when outlet pressure of the first impeller and the second impeller are different, the movable end of the rotatable element deflects to the first impeller or the second impeller to change outlet areas of the first outlet and the second outlet.