Electric axial flow fan
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United States of America Patent
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May 24, 2011
Grant Date -
May 1, 2008
app pub date -
Oct 31, 2007
filing date -
Oct 31, 2006
priority date (Note) -
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Abstract
In an axial flow fan, a line extending from a center axis and passing a corner where a following edge and a radially outer edge of a blade of an impeller meet is arranged forwardly in a rotational direction from an another corner where a leading edge of the blade and a radially outer surface of a hub meet. Furthermore, a camber ratio of the blade, which is minimum at a joint with the hub across the blade, monotonically increases to be maximum at the radially outer edge of the blade.
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