Patent ID: 7492588

Claim:
A heat dissipation apparatus comprising: a centrifugal blower comprising a casing, a stator accommodated in the casing, and a rotor rotatably disposed around the stator, the casing comprising a base wall, a sidewall surrounding the base wall and a cover attached to the sidewall, the sidewall defining an air outlet therein, an air channel formed between blades of the rotor and an inner surface of sidewall of the casing; and a heat dissipater, adapted for thermally connecting with a heat-generating electronic device, made of a porous material and disposed at the air outlet of the centrifugal blower, wherein when the rotor rotates, the rotor generates an airflow flowing through the heat dissipater; wherein the heat dissipater comprises a main portion disposed at the air outlet of the centrifugal blower and a tongue portion extending into the air channel of the centrifugal blower; and wherein the air channel comprises a wide portion located in an upstream airflow, the sidewall of the casing forming a tongue located in a downstream airflow, a narrow portion of the channel being defined between the tongue and the blades of the rotor, the tongue portion of the heat dissipater being disposed at the wide portion of the air channel of the centrifugal blower.