Patent ID: 7423871
Filing Date: 2008-09-09
Classification: H05K

Abstract:
1. An electric device, including a casing, an electric circuit, and at least one fan, (a) said electric circuit being implemented on a printed circuit board where at least one heat generating component is a part of the electric circuit, (b) the casing being substantially a cuboid in shape including a U-shaped bottom and a U-shaped cover having an angled part of said U-shaped bottom and an angled part of said U-shaped cover forming a double wall portion of the casing with an inner wall portion and an outer wall portion defining an air duct between the inner wall portion and the outer wall portion, (c) said air duct having an inlet and an outlet and leading from a front surface to a rear surface of said casing, said inlet is at one of said front surface and said rear surface, said outlet is at the other one of said front surface and said rear surface, said heat generating component being in thermal contact with the inner wall portion, said double wall portion being a heat sink and said at least one fan being arranged such that an air flow produced by said at least one fan is directed through said air duct.