Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
May 26, 2015
Patent Application Number
13408106
Date Filed
February 29, 2012
Patent Citations Received
Patent Primary Examiner
Patent abstract
An impeller includes: a main plate; a shroud; and a plurality of blades provided between the main plate and the shroud and arranged circumferentially; wherein the impeller is configured to rotated about a rotation axis; wherein the plurality of blades include a pressure surface and a negative pressure surface; and the pressure surface has a shape, in which at least three types of circular arcs are connected, as viewed from a rotation axial direction. A centrifugal fan includes the above-described impeller; and three or more pillars, wherein an interval between one adjacent pillars of the three or more pillars is different from an interval between the other adjacent pillars of the three or more pillars.
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