A heat dissipation apparatus (10) includes a heat-dissipating fan (14) and
a fin assembly (12). The heat-dissipating fan includes a casing (141) and
a plurality of blades (142) rotatably received in the casing. The casing
defines an air outlet (148) through which an airflow generated by the
blades flows. The fin assembly is disposed at the air outlet of the fan,
and includes a plurality of first fins (121) and a plurality of second
fins (122) disposed between the first fins and the blades of the fan. The
second fins are so positioned that outer ends of the second fins are
oriented toward a far side of the air outlet while inner ends of the
second fins are oriented toward a near side of the air outlet. The outer
ends of the second fins are located adjacent to the first fins. An
airflow generated by the blades first flows to the near side and then to
the far side of the air outlet.