FAN
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United States of America Patent
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N/A
Issued Date -
Feb 23, 2012
app pub date -
Aug 12, 2011
filing date -
Aug 17, 2010
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A centrifugal fan includes an impeller including a main plate rotating about a center axis and a plurality of vanes fixed to the main plate in a circumferentially spaced-apart relationship, and a bell mouth arranged at an air intake side of the impeller to define an air inlet including a portion whose inner diameter is decreased toward the impeller. Each of the vanes preferably includes a protrusion protruding toward the bell mouth and extending into the air inlet.
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