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Title:
BLOWER IMPELLER
Document Type and Number:
Japanese Patent JP2006090178
Kind Code:
A
Abstract:

To form a blower impeller for air conditioning of two blades from the viewpoint of improvement in fan efficiency, and to reduce rotation noise generated by the blades.

A mixed flow fan 1 is provided with a plurality of blades 2 on a substantially truncated cone-like hub 4, and the main blade 2 has two blades. An outer peripheral chord length of the main blade 2 is longer than a hub side chord length, a triangular blade 10 is provided in a form that a side of the triangle is abutted to an outer peripheral side front edge of the main blade 2, a radius of the blade is identical, an auxiliary blade 3 approximately in a fan shape and having two blades as a whole is provided between the main blades 2, a radial direction length L2 of the auxiliary blade 3 is shorter than a radial direction length L1 of the main blade 2, an outer peripheral side blade height H2 of the auxiliary blade 3 is higher than a blade height H1 of the main blade of the same circumference, and a rear edge 3a of the auxiliary blade 3 on the meridian plane is placed in the windward of a rear edge 6 of the main blade 2 on the meridian plane.


Inventors:
Izumi, Yoshiki
Application Number:
JP2004000275313
Publication Date:
April 06, 2006
Filing Date:
September 22, 2004
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
F04D29/32; F04D23/00; F04D29/38
Domestic Patent References:
JPS5381410U
JPH02252999A
JP2001090693A
JPS6466497A
JPS5686397U
JP2004003447A
JP2003093138A
JPS56163797U1981-12-04
JPH10205330A
Attorney, Agent or Firm:
岩橋 文雄
坂口 智康
内藤 浩樹