Muffler unit for fume extractor hood
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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Abstract
A muffler unit for a fume extractor hood includes an active noise suppression system, at least one loudspeaker, and at least two microphones connected to a control unit, and a passive noise suppression system having sound-absorbent material disposed between the microphones. The muffler unit further includes a conduit with upper fixing element and lower fixing element designed to be removably fixed to a motor unit and to a conveyor plate of the hood.
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Citations
16 Claims
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1. A fume extractor hood comprising:
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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 comprises an 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, and a 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A muffler unit for a fume extractor hood including a motor unit for actuating a fan for air suction and a plate including a filter arranged above a space where fumes are to be sucked, the muffler unit being removably mountable between the motor unit and the plate and comprising:
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an active noise suppression system comprising at least a loudspeaker; a control unit; at least two microphones connected to the control unit, a passive noise suppression system comprising a sound-absorbent material arranged between said microphones; and a conduit with upper fixing element and lower fixing element removably fixable to the motor unit and to the plate, respectively, wherein a transversal section of said conduit of the muffler unit has an odd number of sides, and the sides of the transversal section of the conduit are connected to each other at inner corners of the adjacent sides and free of direct attachment to each other at outer corners of the adjacent sides.
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Specification