Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Vane or deflector
Patent
1998-06-05
2000-10-17
Verdier, Christopher
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Vane or deflector
4152131, 4152141, 416247R, F04D 2966
Patent
active
061321710
ABSTRACT:
The present apparatus provides a blower that improves the P-Q characteristic and reduces noise. The apparatus is a blower that sucks air inside through slits (6) provided in an annular wall (2), wherein the blade thickness near a blade end s is progressively reduced toward the front end, and the location F of the maximum thickness gradually moves back toward a blade trailing edge side u2 so as to make the blade advance angle near the front end larger than in other locations. In addition, the width of a slit is made wider in sections near a spacer than in other sections. Alternatively, notches are provided in the outer perimeter of annular plates near the spacers so as to reduce the radial length of the annular plates. This arrangement improves the P-Q characteristic and reduces noise.
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"High-Flow and Low-Noise Axial Flow Fan"; Hiroyasu Funjinaka; Matsushita Technical Journal, vol. 44, No. 2, Apr. 1998.
Fujinaka Hiroyasu
Otsuka Shigeru
Matsushita Electric - Industrial Co., Ltd.
Verdier Christopher
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