| CPC H05K 7/20145 (2013.01) [H05K 7/20154 (2013.01)] | 19 Claims |
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1. A fan duct that covers a heat sink attached to an electronic component and a fan for blowing air to the heat sink and that is provided with an air inlet on an upstream side in an air blowing direction of the fan and an air outlet on a downstream side, the fan duct comprising:
a branch wall that comprises two plate-shaped portions and is disposed on an inner side of edges of the air outlet, the two plate-shaped portions continuous with each other at sides thereof on the upstream side in the air blowing direction of the fan and inclined relative to the air blowing direction such that the two plate-shaped portions are separated from each other toward the downstream side in the air blowing direction of the fan; and
a plurality of ribs that protrude, by a distance larger than an interval between the branch wall and the heat sink, from a surface of the branch wall facing the heat sink, each of which has a mountain-shaped plate shape with a most protruding top portion having an acute angle, each of the plurality of ribs has a thickness equal to or less than an interval between fins of the heat sink, and the plurality of ribs are provided side by side in a thickness direction of the rib at an interval at which the rib is inserted between the fins.
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