Title:
CROSS-FLOW FAN
Document Type and Number:
Japanese Patent JP3829349
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To surely reduce noise at an arbitrary position by providing a control means for outputting a control sound signal to a speaker in order to radiating predetermined control sound against sound caused by rotation of a fan body.
SOLUTION: An air-conditioning device 10 incorporates a plurality of microphones 30, and two speakers 40. The plurality of microphones 30 include two reference microphones 31 and the remaining number of monitor microphones 32. Further, the speakers 40 are provided to at least one plate 23. Provided is a control means 50 with outputs a control sound signal to the speakers 40 so as to radiate predetermined control sound against sound generated by rotation of a fan 20. With this arrangement, it is possible to reduce noise at an arbitrary position distant from the fan 20.
More Like This:
| JPS5685590 | BLOWER |
Inventors:
Yoshimasa Kikuchi
Takehiko Hiei
Takehiko Hiei
Application Number:
JP34339095A
Publication Date:
October 04, 2006
Filing Date:
December 28, 1995
Export Citation:
Assignee:
Daikin Industries, Ltd.
International Classes:
F04D17/04; F04D29/66; F04D23/00; (IPC1-7): F04D29/66; F04D17/04; F04D23/00
Domestic Patent References:
| JP7259788A | ||||
| JP63140897A | ||||
| JP5164094A | ||||
| JP1128000U | ||||
| JP6323564A | ||||
| JP6043884A | ||||
| JP5312196A |
Attorney, Agent or Firm:
Hiroshi Maeda
Hiroshi Koyama
Hiroshi Koyama