Heat sink systems and devices

Abstract

A heat sink is provided for that eliminates inefficient coolant bypass channels. The heat sink comprises a coolant cavity that is defined by a cover and a body portion. The thermally conductive cover includes a first plurality of substantially uniformly dispersed pin fins that extend at an angle from the inside surface of the cover towards a section of the body portion that is opposite the cover. The body portion opposite the cover includes a second plurality of pin fins that extend in the opposite direction from the first plurality. The coolant cavity also includes thermal bosses that protrude from an inside surface of the body portion. The bosses run parallel to the first and second plurality of pin fins and extend from a point near the thermally conductive cover to the section of the thermally conductive body portion that is opposite to the thermally conductive cover.

1 . A heat sink comprising:
 a thermally conductive cover including a first inside surface portion;   a first plurality of pin fins integral to and depending from the first inside surface portion;   a thermally conductive body portion having a second inside surface portion; and   a second plurality of pin fins integral to and extending from the second inside surface portion in a direction towards the first inside surface portion.   
     
     
         2 . The heat sink of  claim 1 , wherein the first plurality of pin fins depend at a substantially right angle from the first inside surface portion and the second plurality of pin fins extend at a substantially right angle from the second inside surface portion. 
     
     
         3 . The heat sink of  claim 2 , wherein each of the first plurality of pin fins and the second plurality of pin fins have a truncated conical shape with a uniform taper. 
     
     
         4 . The heat sink of  claim 3 , wherein the distance between one of the first plurality of pins fins and each adjacent one of the second plurality of pin fins is substantially uniform. 
     
     
         5 . The heat sink of  claim 1 , wherein each of the first plurality of pin fins makes physical contact with the second inside surface portion. 
     
     
         6 . The heat sink of  claim 1 , further comprising thermally conductive bolts securing the thermally conductive cover to the thermally conductive body portion. 
     
     
         7 . The heat sink of  claim 6 , further comprising an o-ring between the thermally conductive cover and the thermally conductive body portion. 
     
     
         8 . The heat sink of  claim 2 , wherein the body portion further comprises a third inside surface portion having a boss protruding therefrom and extending substantially parallel to at least one of the first plurality of pin fins. 
     
     
         9 . The heat sink of claim of  claim 8 , wherein the boss is one of a plurality of bosses substantially regularly spaced along the third inside surface portion. 
     
     
         10 . A heat sink comprising:
 a thermally conductive cover including a first inside surface portion;   a first plurality of pin fins integral to and depending from the first inside surface portion;   a thermally conductive body portion having a second inside surface; and   a first boss protruding from the second inside surface portion and running substantially parallel to at least one of the first plurality of pin fins.   
     
     
         11 . The heat sink of  claim 10 , wherein the thermally conductive body portion further comprises a bottom surface opposite the thermally conductive cover. 
     
     
         12 . The heat sink of  claim 11 , wherein the first boss extends from a point proximate the first inside surface to the bottom surface. 
     
     
         13 . The heat sink of  claim 12 , comprising a plurality of bosses substantially regularly spaced along the second inside surface portion. 
     
     
         14 . The heat sink of  claim 13 , wherein each of the plurality of bosses has a substantially uniform draft. 
     
     
         15 . The heat sink of  claim 11 , wherein a distance between each of the plurality of bosses and each adjacent pin fin of the first plurality of pin fins is substantially uniform along the length of each of the plurality of adjacent pin fins of the first plurality. 
     
     
         16 . The heat sink of  claim 11 , comprising a second plurality of pin fins integral to and extending from the bottom surface in a direction towards the first inside surface portion. 
     
     
         17 . A heat sink comprising:
 a thermally conductive cover including an first inside surface portion;   a first plurality of pin fins integral to and depending from the first inside surface portion;   a thermally conductive body portion having a second inside surface portion and a inside bottom surface portion;   a first boss protruding from the second inside surface portion, running substantially parallel to at least one of the first plurality of pin fins and extending from the first inside surface portion to the inside bottom surface portion; and   a second plurality of pin fins integral to and extending from the bottom surface portion in a direction towards the first inside surface portion.   
     
     
         18 . The heat sink of  claim 17 , wherein the first plurality of pin fins and the second plurality of pin fins are of a truncated cone shape with a taper. 
     
     
         19 . The heat sink of  claim 18 , wherein the taper of each of the first plurality of pin fins and the second plurality of pin fins is substantially equal. 
     
     
         20 . The heat sink of  claim 19 , wherein the first boss is one of a plurality of bosses substantially regularly spaced along the second inside surface.