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Abstract

A cooler includes: a bent flow path that is in thermal contact with a heating body, bends a flow direction of a refrigerant; and a dividing fin that divides the bent flow path into two or more divided paths in a curvature radial direction. A width of each of the divided paths in the curvature radial direction of the bent flow path is constant along the dividing fin. Inner curvature radii of the divided paths are substantially equal to each other, and outer curvature radii of the divided paths are substantially equal to each other. A thickness of the dividing fin in a center portion of the bent flow path in the curvature radial direction is thicker than a thickness of the dividing fin in an upstream portion and a downstream portion of the bent flow path in the curvature radial direction.

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First Claim