Title:
消音化装置
Document Type and Number:
Japanese Patent JP4964314
Kind Code:
B2
Abstract:
In an appliance, such as a cyclonic vacuum cleaner, a motor is arranged to drive an impeller fan located in a motor and fan unit. The rotation of the impeller may cause nuisance tones to be generated. A silencing arrangement is provided to control such noise and includes a plurality of discrete passive silencers in the form of tube silencers arranged in a first set and a second set. The tube silencers have open end portions arranged to face the fan and the silencers of the first set are spaced from the silencers of the second set in both axial and radial directions. This combination gives the same effect as an array of closely spaced tube silencers—however, by spacing the silencers in two directions, fluid is allowed to flow freely.
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Inventors:
Sara Helen Liddell
Application Number:
JP2010038274A
Publication Date:
June 27, 2012
Filing Date:
February 24, 2010
Export Citation:
Assignee:
Dyson Technology Limited
International Classes:
A47L9/00; A45D20/12; A47L11/40
Domestic Patent References:
| JP57027245U |
Attorney, Agent or Firm:
Koichi Tsujii
Sadao Kumakura
Disciple Maru Ken
Ino Sato
Mitsuru Matsushita
Ichiro Kurasawa
Sadao Kumakura
Disciple Maru Ken
Ino Sato
Mitsuru Matsushita
Ichiro Kurasawa