Low-noise vapor exhaust hood
First Claim
1. A vapor exhaust hood comprising:
- a vapor hood housing defining an intake chamber and having an intake opening;
a filter element disposed to filter air entering said intake chamber through said intake opening;
a fan assembly disposed within said intake chamber, said fan assembly including a fan wheel having a radius, a fan housing defining first and second inlet openings, and an outlet opening through which air is ventable from said vapor hood housing;
a first sound absorbing material layer disposed on said vapor hood housing within said intake chamber and having a first surface facing said first inlet opening, said first surface spaced from said first inlet opening by a distance greater than or equal to one-half the radius of said fan wheel, said first layer covering a first surface area of said vapor hood housing greater than or equal to a circular area defined by a circle having a radius equivalent to the radius of said fan wheel;
a second sound absorbing material layer disposed on said vapor hood housing within said intake chamber and having a second surface facing said second inlet opening, said second surface spaced from said second inlet opening by a distance greater than or equal to one-half the radius of said fan wheel, said second layer covering a second surface area of said vapor hood housing greater than or equal to said circular area; and
a first closed membrane and a second closed membrane respectively covering said first surface and said second surface.
3 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to a vapor exhaust hood with a housing which features at least one intake opening equipped at a minimum with one filter, and features at least one outlet opening, and the inside surfaces of which are in part lined with a sound-deadening material, with a fan arranged in the housing. Arranged in the housing, at least opposite each inlet opening of the fan, is sound-absorbing material which from the opposite inlet opening is spaced at least the radius of the fan wheel. The sound-absorbing material has a surface which in size corresponds at least to a circular surface whose radius matches that of the fan wheel. Further measures for noise reduction consist in the arrangement of a vane in the area of the outlet opening, in the application of sound-deadening and/or sound-damping material as well as in the elastic mounting of fan and/or fan motor. The invention thus creates a vapor exhaust hood in which, for one, the number of noise generators is reduced and, for another, inevitable noise is damped and deadened.
55 Citations
20 Claims
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1. A vapor exhaust hood comprising:
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a vapor hood housing defining an intake chamber and having an intake opening; a filter element disposed to filter air entering said intake chamber through said intake opening; a fan assembly disposed within said intake chamber, said fan assembly including a fan wheel having a radius, a fan housing defining first and second inlet openings, and an outlet opening through which air is ventable from said vapor hood housing; a first sound absorbing material layer disposed on said vapor hood housing within said intake chamber and having a first surface facing said first inlet opening, said first surface spaced from said first inlet opening by a distance greater than or equal to one-half the radius of said fan wheel, said first layer covering a first surface area of said vapor hood housing greater than or equal to a circular area defined by a circle having a radius equivalent to the radius of said fan wheel; a second sound absorbing material layer disposed on said vapor hood housing within said intake chamber and having a second surface facing said second inlet opening, said second surface spaced from said second inlet opening by a distance greater than or equal to one-half the radius of said fan wheel, said second layer covering a second surface area of said vapor hood housing greater than or equal to said circular area; and a first closed membrane and a second closed membrane respectively covering said first surface and said second surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification