Airflow guiding structure varying in inclinations of air-guiding rings for a heat-dissipating fan
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United States of America Patent
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Feb 26, 2008
Grant Date -
Sep 1, 2005
app pub date -
Apr 19, 2005
filing date -
Aug 19, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A heat-dissipating fan includes a casing having an air outlet, a base mounted in the air outlet, an impeller being mounted on the base and having a plurality of blades, a plurality of ribs each extending between the base and the casing along a radial direction of the base, and at least two air-guiding ring fixedly mounted to the ribs. The air-guiding rings vary in inclinations along a longitudinal direction of the casing. The air-guiding ring guides airflow in various directions, and divides airflow passing through the air outlet when the impeller is turning.
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