Heat dissipating device having a fan duct

A heat dissipation device comprising:

• a heat sink comprising a heat spreader, a cover parallel to the heat spreader and a plurality of fins disposed between the heat spreader and the cover, the cover having threaded holes defined therein;
• a fan positioned on the heat spreader of the heat sink;
• and
• a fan duct comprising a mounting plate, a faceplate extending downwardly from and perpendicular to the mounting plate, and a baffle wall extending downwardly from the mounting plate, the mounting plate comprising locating holes corresponding to the threaded holes of the cover and permitting screws to pass through the locating holes and to engage with the threaded holes of the cover, the mounting plate further comprising supporting rods extending downwardly from a bottom thereof and abutting against the cover to thereby form a gap between the mounting plate and the cover, the faceplate comprising a mounting face for the fan being mounted thereon and a central opening for an air flow generated by the fan therethrough, the baffle wall and the heat sink form an outlet through which the air flow generated by the fan flows, the air flow also flowing through channels between the fins.

A heat dissipating device comprising:

• a heat spreader for contacting with a first heat-generating electronic device;
• a plurality of fins on the heat spreader, said fins forming a plurality of channels therebetween, the channels extending along a front-to-rear direction;
• a fan duct having a mounting plate mounted on a top of the fins, a faceplate on a front side of the fins and a baffle wall extending downwardly from a lateral side of the mounting plate;
• a fan mounted on the faceplate of the fan duct, wherein an air flow generated by the fan has a portion flowing through the channels of the fins and another portion flowing between the fins and the baffle wall for blowing a second heat generating electronic device;
• and
• a heat pipe having an evaporating portion mounted on the heat spreader a condensing portion mounted on the top of the fins, and a connecting portion interconnecting the evaporating portion and the condensing portion and located between the fins and the baffle wall;
• wherein the mounting plate of the fan duct has a supporting rod thereon the supporting rod abutting against the top of the fins to form a gap between the top of the fins and the mounting plate, the fan duct further comprising first and second baffle plates extending downwardly from adjoining sides of the mounting plate and abutting against the top of the fins.