Title:
CENTRIFUGAL BLOWING DEVICE
Document Type and Number:
Japanese Patent JP3838200
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce blowing noise while improving blowing efficiency.
SOLUTION: With the increase of a blast amount by the increase of applied voltage to a fan motor, a movable wall 73a is displaced onto the opposite side to an outside internal wall surface 73b to enlarge a passage cross-sectional area. Conversely, with the decrease of the blast amount by the decrease of applied voltage to the fan motor, the movable wall 73a is displaced onto the outside internal wall surface 73b side to reduce the passage cross-sectional area. An air passage reaching a scroll part 72 and an air guide duct part 73 can thereby be formed in optimum shape dimensions corresponding to the blast amount. Since the movable wall 73a is displaced in the state of the internal wall surface of the air guide duct part 73 being continuously in line from the windward to the leeward of air flow, the generation of vortex in the air guide duct part 73 can be prevented. Blowing noise can thereby be reduced while improving blowing efficiency.
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| JPH102295 | DOUBLE COOLING FAN DEVICE |
| JPS6466496 | FAN |
Inventors:
Ochiai Toritoku
Manabu Miyata
Manabu Miyata
Application Number:
JP2003003273A
Publication Date:
October 25, 2006
Filing Date:
January 09, 2003
Export Citation:
Assignee:
株式会社デンソー
International Classes:
F04D27/00; F04D29/46; B60H1/00; F01D17/14; F04D29/08; F04D29/42; F04D29/44; (IPC1-7): F04D29/46; B60H1/00; F04D27/00; F04D29/08
Domestic Patent References:
| JP200289494A | ||||
| JP2001140795A | ||||
| JP45850Y1 | ||||
| JP55116924U | ||||
| JP60107398U | ||||
| JP1170798A | ||||
| JP1152098U |
Attorney, Agent or Firm:
Yoji Ito
Takahiro Miura
Fumihiro Mizuno
Takahiro Miura
Fumihiro Mizuno