Patent ID: 9212853
Filing Date: 2015-12-15
Classification: F28F,H01L,H05K

Abstract:
1. A cooler comprising: a heat discharge unit in which a plurality of heat discharge fins are placed in a line and a coolant flows through a passage between the heat discharge fins; an inflow-side coolant reservoir provided extending in a lined direction of the heat discharge fins and connected to a side of one end of the passage between the heat discharge fins through a first diaphragm portion; and an outflow-side coolant reservoir provided extending in the lined direction of the heat discharge fins and connected to a side of the other end of the passage between the heat discharge fins through a second diaphragm portion, wherein the coolant supplied to the inflow-side coolant reservoir flows to the passage between the heat discharge fins through the first diaphragm portion and flows out to the outflow-side coolant reservoir through the second diaphragm portion; at least one inflow-side fin is formed in a standing manner on a surface of the inflow-side coolant reservoir opposing the first diaphragm portion, at least one outflow-side fin is formed in the standing manner on a surface of the outflow-side coolant reservoir opposing the second diaphragm portion, the circulation cross sectional area of the inflow-side coolant reservoir that includes the at least one inflow-side fin is smaller than a circulation cross sectional area of the outflow-side coolant reservoir that includes the at least one outflow-side fin, and wherein a circulation resistance of the inflow-side coolant reservoir, a circulation resistance of the outflow-side coolant reservoir, and circulation resistances of the first and second diaphragm portions satisfy a relationship of: (circulation resistances of the first and second diaphragm portions)>(circulation resistance of the outflow-side coolant reservoir)>(circulation resistance of the inflow-side coolant reservoir).