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Title:
遠心送風機及びこれを備えた空気調和機
Document Type and Number:
Japanese Patent JP5783214
Kind Code:
B2
Abstract:
In a centrifugal fan (51), when an angle defined by a tangential line (L1) to a camber line (CL) at an intersection point (P) between the camber line (CL) and an arc around a rotation axis (A), and a tangential line (L2) to the arc at the intersection point (P) on a blade cross section passing a front edge (61) and a rear edge (62) of a blade (21) is a blade angle (²), the blade (21) has at least one of a decreasing shape and a fixed shape. The decreasing shape is such that the blade angle (²) decreases as the intersection point (P) is shifted toward the rear edge (62) on the camber line (CL) on a front edge (61)-side portion (PL) of a shroud (19)-side blade cross section (S1). The fixed shape is such that the blade angle (²) is fixed, even if the intersection point (P) is shifted toward the rear edge (62) on the camber line (CL) on the front edge (61)-side portion (PL) of the shroud (19)-side blade cross section (S1).

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Inventors:
Otaguro Ryusuke
Application Number:
JP2013205128A
Publication Date:
September 24, 2015
Filing Date:
September 30, 2013
Export Citation:
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Assignee:
Daikin Industries, Ltd.
International Classes:
F04D29/30; F04D29/66; F24F1/0047
Domestic Patent References:
JP2011252424A
JP2007321643A
JP2007198268A
JP5312189A
JP5312190A
JP2011226398A
JP6153497A
JP2005155579A
Foreign References:
US5996685
Attorney, Agent or Firm:
Etsushi Kotani
Masataka Otani
Tamagushi Yukihisa



 
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