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Muffler unit for fume extractor hood

  • US 8,365,861 B2
  • Filed: 02/17/2010
  • Issued: 02/05/2013
  • Est. Priority Date: 02/19/2009
  • Status: Active Grant
First Claim
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1. A fume extractor hood comprising:

  • a motor unit comprising a conduit that houses a motor for actuating a fan for air suction;

    a plate comprising a filter adapted to be arranged above a space where fumes are to be sucked;

    a muffler unit removably mountable between said motor unit and said plate,wherein said muffler unit comprisesan active noise suppression system comprising at least a loudspeaker,at least two microphones connected to a control unit,a passive noise suppression system comprising a sound-absorbent material arranged between said microphones, anda conduit with an upper fixing element and a lower fixing element removably fixable to said motor unit and to said plate, respectively,wherein said conduit of said muffler unit has a pentagonal transversal section.

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