Title:
DAMPING DEVICE FOR NOISE IN AIR CONDITIONER DUCT
Document Type and Number:
Japanese Patent JP2531054
Kind Code:
B2
Abstract:
PURPOSE: To realize a noise damping measure for an air conditioning duct in a supply system and noise damping measure for an air conditioning duct in a return system that use a common space and reduce space.
CONSTITUTION: An air conditioning duct 34 in a supply system goes through a duct space 31 that is surrounded by a boundary walls 32 of a building such as a hall, etc. The inside section of the duct space 31 of this air conditioning duct 34 is made of a glass wool duct 34b that is acoustically permeable and the noises that come through the inside of the air conditioning duct 34 in the supply system are reduced by absorption in expansion by the duct space 31. And, from upper and lower boundary walls 32 an air conditioning duct 50 in a return system is inserted into the duct space 31, and it is used as part of the return system. The noises coming through the air conditioning duct 50 in the return system is absorbed in expansion in the duct space 31 in which the glass wool duct 34b acts as a partition wall and the noises are reduced.
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Inventors:
KAWAKAMI FUKUJI
WATANABE TAKAYUKI
WATANABE TAKAYUKI
Application Number:
JP33773591A
Publication Date:
September 04, 1996
Filing Date:
November 27, 1991
Export Citation:
Assignee:
YAMAHA CORP
International Classes:
F24F13/02; (IPC1-7): F24F13/02
Attorney, Agent or Firm:
Kunihiko Kato (1 person outside)