| 摘要 |
A cooler is provided which comprises a heat discharging unit in which a plurality of heat discharge fins are placed in a line and a coolant flows in 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. An inflow-side fin is formed on a surface of the inflow-side coolant reservoir opposing the first diaphragm portion, and a circulation cross-sectional area of the inflow-side coolant reservoir is set smaller than a circulation cross-sectional area of the outflow-side coolant reservoir. |
