AXIAL-FLOW FAN
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United States of America Patent
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Issued Date -
May 30, 2013
app pub date -
Nov 20, 2012
filing date -
Nov 25, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An axial-flow fan includes an impeller mounted on a rotating shaft of a rotary drive device and a venturi casing surrounding an outer periphery of the impeller in a radial direction and including a suction port and a discharge port facing each other in an axial direction of the rotating shaft . An inner surface of the venturi casing includes a suction-side slant part 31 expanding the suction port outward in the radial direction of the impeller, a linear part continuing from the suction-side slant part and forming an axial flow of a fluid with the impeller, a discharge-side slant part 34 expanding the discharge port outward in the radial direction of the impeller, and a curved part connecting the linear part and the discharge-side slant part.
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