Title:
軸流ファン、遠心力ファン、およびこれらを用いた電子機器
Document Type and Number:
Japanese Patent JP4075264
Kind Code:
B2
Abstract:
A low-noise axial fan is provided with whirring sound minimized. The axial fan includes a plurality of blades arranged around a rotation axis at predetermined layout pitches. The blades are arranged at varied layout pitches. For instance, the layout pitch between the two adjacent blades may be different from the layout pitch between the remaining blades. This arrangement controls the whirring sound of the fan, which would be high in level if the blades were arranged at an equal layout pitch. A low-noise axial fan thus results.
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Inventors:
Atsushi Miyazawa
Application Number:
JP2000020813A
Publication Date:
April 16, 2008
Filing Date:
January 28, 2000
Export Citation:
Assignee:
Seiko Epson Corporation
International Classes:
F04D29/38; F04D29/28; F04D29/30; F04D29/32; F04D29/66
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Attorney, Agent or Firm:
Intellectual Property Office
Kinoshita Minoru
Kanji Nakayama
Tsuyoshi Ishizaki
Masahiko Ueyanagi
Osamu Suzawa
Kinoshita Minoru
Kanji Nakayama
Tsuyoshi Ishizaki
Masahiko Ueyanagi
Osamu Suzawa