Patent ID: 6654245
Filing Date: 2003-11-25
Classification: G06F

Abstract:
A cooler for an electronic unit, comprising:a heat sink having; a first portion which contacts with a heat generating body directly, or through a material having a heat conductivity coefficient of at least a predetermined value and a thickness of no more than a predetermined value; a fan; a second portion defining at least a portion of a fan disposing space said first and second portions are continuous to each other and spread substantially horizontally above said heat generating body and said fan; said fan being arranged in said fan disposing space and said fan has a plurality of blades which rotate with a vertical direction of said heat sink as its axis of rotation so that air introduced in said vertical direction is discharged in a radial direction as a horizontal direction; said fan and said heat generating body being disposed side by side in a horizontal direction of said heat sink; and a heat pipe mounted on said heat sink so that it contacts with said heat generating body directly or through said material at said first portion, and it is exposed to said fan disposing space at said second portion, said heat pipe extending substantially horizontally along the bottom surface of said first and second portions; wherein said second portion has a top surface lower than the top surface of said first portion; and said lower top surface has an inlet port communicating with said fan disposing space and also reaches at least one side surface of said heat sink.