Patent ID: 8248794

Claim:
A heat dissipation device comprising: a heat sink defining a plurality of air passages therein; a fan holder fixedly mounted on the heat sink, the fan holder comprising a supporting plate and two mounting plates extending from two opposite sides of the supporting plate; a fan mounted on the supporting plate of the fan holder; and an adjustable wind-guiding module located in and pivoted to the fan holder, the fan being positioned for generating an airflow flowing through the adjustable wind-guiding module generally toward the air passages of the heat sink; wherein the adjustable wind-guiding module is selectably pivotable with respect to the fan holder such that a direction of the airflow generally toward the air passages of the heat sink is changed accordingly; and wherein the adjustable wind-guiding module comprises a plurality of wind-guiding wings, a connecting frame and an adjuster, the wind-guiding wings being parallel to and spaced from each other, each of the wind-guiding wings has a first end and a second end opposite to the first end, the first end and the second end of each of the wind-guiding wings being respectively pivoted to the two mounting plates of the fan holder, the connecting frame comprises an elongated driving plate and a connecting portion extending from the driving plate, the first end of each of the wind-guiding wings has an upper side pivoted to a corresponding mounting plate of the fan holder and a lower side pivoted to the driving plate, the connecting frame being movable relative to the corresponding mounting plate to make the lower side of the first end of each of the wind-guiding wings pivot about the upper side of the first end of each of the wind-guiding wings, the adjuster is configured for adjusting a relative location between the connecting frame and the mounting plate of the fan holder and selectably fixing the connecting frame relative to the fan holder such that the wind-guiding wings are selectably pivotable with respect to the fan holder, the adjuster comprises a bolt extending through the connecting portion of the connecting frame and the corresponding mounting plate of the fan holder, and a knob threadedly connected with the bolt, the bolt being slidable along horizontal directions relative to the corresponding mounting plate and being fixable relative to the corresponding mounting plate by threaded tightening of the knob on the bolt.