Fan and shroud assembly
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United States of America Patent
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-
Mar 8, 2005
Grant Date -
Aug 28, 2003
app pub date -
Feb 26, 2003
filing date -
Feb 27, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A fan and shroud assembly includes a fan having a hub rotating around one shaft and a plurality of blades extending outwardly from the hub, a shroud encompassing the fan to adjust airflow by rotation of the fan, a guide ring portion located at a position where a predetermined gap exists between the shroud and a circumference connecting end tips of the blades so that the fan is supported by the shroud and rotates, and a plurality of swirl prevention units integrally formed with the guide ring portion to prevent a vortex from proceeding along the circumference in the predetermined gap, each swirl prevention unit having a shape in which the length of a circular arc passing through each of the swirl prevention units with respect to the center of the shroud decreases as the arc is closer to the center of the shroud.
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