Patent ID: 9523541
Filing Date: 2016-12-20
CPC Classification: F28F,H01L,H05K

Claim Text:
1. A cooling fin structure used in a cooler for an electric device, comprising: a plurality of pin fins arranged in a zigzag form in a coolant passage through which a coolant flows, wherein: each of the pin fins has a circular portion having a circular cross-section, and curved portions provided contiguously on the upstream side and downstream side of the circular portion as viewed in a direction of flow of the coolant; the curved portions have an outer peripheral surface that is entirely formed along a circumference having a center at a center point of the circular portion of an adjacent one of the pin fins that is located adjacent to the pin fin having the curved portions, in an oblique direction relative to the direction of flow of the coolant; and each of the curved portions has opposite curved faces formed contiguously with outer peripheral surfaces of the circular portion and each of the opposite curved faces is provided by the outer peripheral surface formed along the circumference, wherein the opposite curved faces of each of the respective curved portions meets at an end point, so that the opposite curved faces are each continuously curved from the end point to a position at which the curved face continues into the corresponding outer peripheral surface of the circular portion, wherein