Patent ID: 6457514
Filing Date: 2002-10-01
Classification: H01L

Abstract:
In a heat dissipator for electronic components, wherein a sealed housing has an inlet and further has an outlet for flow of a coolant through the housing between the inlet and the outlet thereof, and wherein the housing includes top and bottom walls joined by a side wall, the side wall comprising a metal plate having respective internal and external surfaces, the improvement wherein a plurality of electronic components are mounted only on portions of the external surface of the metal plate, other portions of the external surface being free of electronic components, a plurality of spaced-apart baffles disposed within the housing the baffles having respective upper and lower end portions which are spaced from the top and bottom walls of the housing, respectively, such that a first conduit for coolant flow is formed in the housing between the top wall of the housing and the respective upper end portions of the baffles, such that a second conduit for coolant flow is formed in the housing bottom wall of the housing between the baffles and the respective lower end portion of the baffles, such that the coolant from the inlet flows through the first conduit within the housing, transversely thereof, and adjacent to the top wall of the housing, then divides between the respective spaced-apart baffles, and such that the coolant flow between the spaced-apart baffles merges into the second conduit and exits from the outlet in the housing, and a plurality of clusters of radiating fins mounted on the internal surface of the metal plate, the radiating fins being disposed between respective adjacent pairs of spaced-apart baffles and substantially transversely of the coolant flow, the radiating fins further being disposed only substantially opposite to the electronic components mounted on the external surface of the metal plate, there being no fins located opposite those portions of the external surface which are free of electronic components.