Centrifugal fan module, heat dissipation device having the same and electric device having the heat dissipation device

摘要

A centrifugal fan module, a heat dissipation device having the same and an electric device having the heat dissipation device are provided, in which the heat dissipation device includes a fin module and a centrifugal fan module including a volute-shaped frame and a centrifugal fan pivoted in the volute-shaped frame. The volute-shaped frame includes an air inlet, a larger air outlet and a smaller air outlet. The air inlet and the smaller air outlet are both on the same surface of the volute-shaped frame. The larger air outlet is coupled to the fin module. The smaller air outlet is arranged correspondingly to a maximum wind-speed flowing path of the centrifugal fan.

主权项

1. A heat dissipation device, comprising:
a heat dissipation fin module; and a centrifugal fan module comprising:
a volute-shaped frame having an air inlet, a larger air outlet and at least one smaller air outlet, the air inlet formed on a surface of the volute-shaped frame, the larger air outlet formed on a volute opening of the volute-shaped frame and being connected to the heat dissipation fin module, and the at least one smaller air outlet being formed on the surface of the volute-shaped frame closer to the heat dissipation fin module than the air inlet, wherein the at least one smaller air outlet is presented as a trapezoidal shape, and comprises a first side and a second side opposite with each other, the first side thereof is closer to the heat dissipation fin module than the second side thereof, and the first side thereof is longer than the second side thereof;
a centrifugal fan pivotally disposed in the centrifugal fan module, rotating according to a clockwise direction, wherein the centrifugal fan inhales air through the air inlet, and blows air from the larger air outlet and the at least one smaller air outlet together, wherein the at least one smaller air outlet is allowed to spout a sector-shaped jet of the air towards the heat dissipation fin module; anda motor driving the centrifugal fan to rotate,wherein the at least one smaller air outlet is further located on the surface of the volute-shaped frame corresponding to a maximum wind-speed flowing path of the centrifugal fan to the larger air outlet.