CPU cooling structure with a ventilation hood

Abstract

A CPU cooling structure includes a ventilation hood mounted in between a heat sink and a cooling fan, the ventilation hood having a conical outer hood shell and a conical inner hood shell concentrically formed integral with a flat mounting base thereof and fitted into a conical top receiving space of the heat sink, and radial partition ribs connected between the conical outer hood shell and the conical inner hood shell and separating the space between the conical outer hood shell and the conical inner hood shell into multiple wind passages adapted to guide currents of air from the cooling fan downwards toward the center of the heat sink.

What the invention claimed is:  
     
         1 . A CPU cooling structure comprising a heat sink, a cooling fan, and a ventilation hood, wherein said ventilation hood comprises a flat mounting base fixedly connected between said heat sink and said cooling fan by fastening elements, a conical outer hood shell and a conical inner hood shell concentrically formed integral with a bottom surface of said flat mounting base and inserted into said heat sink, and radial partition ribs connected between said conical outer hood shell and said conical inner hood shell, and wind passages defined within said conical outer hood shell outside said conical inner hood shell and separated from one another by said partition rids and adapted to guide currents of air downwards from said cooling fan toward said heat sink, said conical inner hood shell having an inner diameter gradually downwardly reduced from said flat mounting base toward said heat sink.  
     
     
         2 . The CPU cooling structure of  claim 1  wherein said heat sink comprises a plurality of radially extended upright radiation fins, said upright radiation fins having a respective curved top edge defining a conical receiving space at the center of a top side of said heat sink for receiving the conical outer hood shell and conical inner hood shell of said ventilation hood.