Patent ID: 6834713
Filing Date: 2004-12-28
Classification: F28D,F28F,H01L

Abstract:
A heat sink assembly for cooling an electronic device, said heat sink assembly comprising:a fan housed in a shroud, said fan including a hub having a diameter â€œHâ€  and fan blades extending therefrom for causing an axially directed airflow through said shroud upon rotation of said fan blades; and a thermosiphon comprising an evaporator defining an evaporating chamber containing a working fluid therein and a condenser mounted thereabove, said thermosiphon positioned at one end of said shroud such that said fan is aligned with said condenser for directing said axial airflow therethrough; wherein: said condenser includes a plurality of tubes forming a tube grouping, each said tube having an opening in fluid communication with said evaporator and for receiving and condensing vapor of said working fluid from said evaporator, said tubes being axially aligned with said airflow and laterally positioned such that a lateral width of said tube grouping is approximately equal to a width of said fan hub and substantially in lateral alignment therewith.