Patent ID: 8638554
Filing Date: 2014-01-28
Classification: F24F,H05K

Abstract:
1. An electronic device, comprising: an enclosure, the enclosure defining a mounting hole therein; a circuit board received in the enclosure, the circuit board comprising a first area for mounting a first electronic component and a first heat sink on the first electronic component, and a second area for mounting a second electronic component and a second heat sink on the second electronic component; and an air duct mounted in the enclosure, the air duct covering the first area and the second area of the circuit board, the air duct comprising: wherein when the first electronic component with the first heat sink attached thereon and the second electronic component with the second heat sink attached thereon are both mounted on the circuit board, the baffle plate is rotated towards the top plate and the torsion spring is compressed, and the second end of the baffle plate abuts against a top of the second heat sink, such that air flowing through the air duct is able to pass over both the first electronic component and the second electronic component; and when the second electronic component and the second heat sink are absent and only the first electronic component with the first heat sink attached thereon is mounted on the circuit board, the baffle plate is located approximately perpendicular to the top plate with the second end of the baffle plate adjacent to the circuit board, such that the baffle plate baffles air flowing through the air duct at the location of the missing second electronic component and redirects at least part of such air to flow toward the first electronic component.