Patent ID: 9557117
Date: 2017-01-31
CPC Classifications: F28D,F28F,H01L

Claim:
1. A cooling structure comprising: an evaporation chamber defined by a base plate, a ceiling plate having a ceiling surface in a lower portion thereof and a side wall having a cylindrical shape, said base plate having a boiling surface which receives heat from a component to be cooled and exchanges heat with a liquid phase coolant; a plurality of plate-shaped fins, which are arranged in parallel in a standing state on said boiling surface of said base plate, defining a plurality of coolant passages in said evaporation chamber, in which the liquid phase coolant flows through said plurality of coolant passages in one direction from one end portion thereof toward another end portion thereof; a liquid return port, which is formed in a first portion of said side wall facing, without obstruction, one end portion of said plurality of coolant passages, through which said liquid phase coolant obtained by liquefaction of a vapor phase coolant in a condensation chamber flows into said evaporation chamber, said liquid return port configured so as to be in contact with an edge of said boiling surface; and a vapor port, which is formed in a portion of said ceiling plate adjacent to a second portion of said side wall facing, without obstruction, another end portion of said plurality of coolant passages, through which said vapor phase coolant obtained by evaporation of said liquid phase coolant in said evaporation chamber is guided into said condensation chamber, wherein a first clearance between said one end portion of said plurality of plate-shaped fins and said first portion of said side wall is set to be less than a second clearance between said other end portion of said plurality of plate-shaped fins and said second portion of said side wall, and wherein space is formed between said ceiling surface and an upper end portion of said plurality of plate-shaped fins, the space expanding gradually from a liquid return port side of said side wall toward said vapor port.