Patent ID: 7911119

Claim:
A heat dissipating device comprising: a heat dissipater including a plurality of heat dissipating fins erected from a plate and arranged at interval, wherein a heat dissipating passage is defined between two adjacent heat dissipating fins; a turbine ventilator disposed above the heat dissipater, having a plurality of bent fins disposed on a frame and assembled to form a sphere, the turbine ventilator having a central axis and an axial line of the central axis being parallel to the heat dissipating passages; and a retainer at the bottom side of the frame of the turbine ventilator fixing the turbine ventilator to the heat dissipater, wherein the retainer has a screw hole and the heat dissipating fin has a fixing hole corresponding to the screw hole, a screw threaded in the screw hole and the fixing hole to fix the retainer to the heat dissipating fin, and whereby heat dissipated by the heat dissipating passages enters into the turbine ventilator to rotate the bent fins, and when the turbine ventilator keeps rotating, the heat at lower portion of the heat dissipating device is convected to flow upward and rotate the bent fins faster, so that the heat is dissipated with good ventilation and the rotation of the turbine ventilator does not need additional electricity; therefore, enhanced efficiency of heat dissipation is achieved with reduced power consumption.