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Title:
PROPELLER FAN AND AXIAL FLOW BLOWER
Document Type and Number:
WIPO Patent Application WO/2019/069374
Kind Code:
A1
Abstract:
A stagger angle of a rotating blade has a first stagger angle distribution having a minimum value, in a region from an inner circumferential edge (Rc) to a first boundary position (Re1), and has a second stagger angle distribution including an n-order function in which the radius of the rotating blade is a variable, and which increases toward an outer circumferential edge (Rd), in a region from the first boundary position (Re1) to the outer circumferential edge (Rd). n is a value between 1 and 2, excluding 1. By this means, low noise and high efficiency can be achieved while limiting the height of the outer circumferential portion.

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Inventors:
ARAI TOSHIKATSU (JP)
KIKUCHI HITOSHI (JP)
KADOI CHIKAGE (JP)
Application Number:
PCT/JP2017/036010
Publication Date:
April 11, 2019
Filing Date:
October 03, 2017
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F04D29/38
Domestic Patent References:
WO2015092924A12015-06-25
Foreign References:
JP2003184792A2003-07-03
JP2012233420A2012-11-29
JP2007113474A2007-05-10
JP2009275524A2009-11-26
JPH11303794A1999-11-02
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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