Patent ID: 8033325
Filing Date: 2011-10-11
Classification: F28F,H01L

Abstract:
1. A heat dissipation apparatus with coarse surface capable of intensifying heat transfer comprising: a main body providing a first plate member, a second plate member, a third plate member and a fourth plate member, wherein the first plate member is disposed opposite to the fourth plate member, the second plate member is disposed opposite to the third plate member and two opposite sides of the first and fourth plate members are joined to two opposite sides of the second and third plate members respectively such that a passage is formed by the plate members; and a heat transfer reinforced unit being provided at a surface of one of the four plate members or two opposite surfaces of the four plate members and further comprising: a plurality of raised parts being disposed slightly upright from the respective surface and spacing apart a distance from each other; and a plurality of fish-scale-like parts each being disposed on the respective surface next to the respective raised part, providing a recess toward said surface with an inclining angle to the respective surface and having an edge such that a sharp end is formed by every two adjacent ones of said fish-scale-like parts and disposed at an intersection of the respective edge of the two adjacent ones of said fish-scale-like parts; wherein said respective raised part and said fish-scale-like parts allow fluid near said respective surface creating eddy flows and secondary flows and breaking boundary layers of the fluid such that a heat generating component is capable of contacting an outer side of the main body at another surface opposite to the heat transfer intensifying unit for promoting heat transfer efficiency; wherein the respective raised part has a first partition member and a second partition member extending from two opposite lateral sides of the respective surface toward a central line of the respective surface such that said two partition members intersect at the central line and define an included angle.