COOLING DEVICE WITH A PLURALITY OF FIN PITCHES

摘要

Provided is a cooling device wherein the cooling capability on the leeward side is improved without increasing the number of installed cooling fins or the airflow of cooling air. A cooling device is provided with a heat-receiving block thermally connected to a heater element; and a group of cooling fins including a plurality of fins thermally connected to the heat-receiving block such that the flow of cooling air is set in parallel with the heat-receiving block, wherein a plurality of the groups of cooling fins is arranged longitudinally along the flow direction of the cooling air, and of the plurality of the groups of cooling fins, the fin pitch of the groups of cooling fins arranged on the windward side of the cooling air is larger than the fin pitch of the groups of cooling fins arranged on the leeward side of the cooling air.