Patent ID: 7688579

Claim:
A portable electronic device, comprising: a casing defining a space therein; an electronic component disposed in the space of the casing; and a thermal module comprising a heat pipe, a fin unit, and a transverse fan, the heat pipe comprising an evaporating section thermally attached to the electronic component to absorb heat from the electronic component during operation of the electronic component, and a condensing section thermally attached to the fin unit to dissipate the heat absorbed from the electronic component to the fin unit, the transverse fan being arranged in the casing and configured for generating an airflow to take away the heat of the fin unit, the transverse fan comprising a rotor, and a sidewall located on a floor of the casing and surrounding the rotor, the sidewall defining an air inlet and an air outlet therein, the air outlet facing toward the fin unit, the air inlet facing toward the electronic component, wherein the transverse fan further comprises a cover arranged on a top end of the sidewall for supporting the rotor, the cover abutting a roof of the casing.