Liquid cooled heat sink

Abstract

A liquid cooled heat sink includes: a casing having a liquid inlet and a liquid outlet; and a fin unit provided in the casing and having a wave-like structure of a multi-fold sheet that defines a plurality of fluid paths which are aligned in series in a transverse direction relative to the fluid paths. The liquid inlet of the casing is in fluid communication with the liquid outlet of the casing through the fluid paths.

1 . A liquid cooled heat sink adapted to be attached to an electronic component, said liquid cooled heat sink comprising:
 a casing having a liquid inlet and a liquid outlet; and   a fin unit provided in said casing and having a wave-like structure of a multi-fold sheet that defines a plurality of fluid paths which are aligned in series in a transverse direction relative to said fluid paths;   wherein said liquid inlet of said casing is in fluid communication with said liquid outlet of said casing through said fluid paths.   
   
   
       2 . The liquid cooled heat sink as claimed in  claim 1 , wherein each of said fluid paths is defined by a path-defining wall that is generally U-shaped and that has two opposite straight wall portions and a folded portion interconnecting said straight wall portions, each of said straight wall portions of said path-defining wall of each of said fluid paths being formed with a plurality of slits so as to permit fluid communication between each two adjacent ones of said fluid paths. 
   
   
       3 . The liquid cooled heat sink as claimed in  claim 1 , wherein said casing has a base that is formed with an attaching protrusion adapted to be attached to the electronic component. 
   
   
       4 . The liquid cooled heat sink as claimed in  claim 1 , wherein said casing is made from an aluminum alloy extrudate. 
   
   
       5 . The liquid cooled heat sink as claimed in  claim 1 , wherein said fin unit is detachably mounted in said casing.