Flues for exhausting fumes from environments and domestic hoods having such flues

Abstract

The present description relates to a flue (1) for evacuating fumes from rooms, and relative household hood provided with such evacuation flue, in particular for evacuating cooking fumes, comprising a first stretch (2) which develops along a vertical direction (A) from an inlet section (2a); at least one outlet opening (4) for discharging the fumes along a substantially horizontal direction, the outlet opening (4) having a height along the vertical direction (A) and a width along a direction orthogonal to the vertical direction (A); a second joining stretch (5) between the first stretch (2) and the outlet opening (4); the height is less than 40 mm, preferably less than 40 mm, preferably less than or equal to 35 mm.

1 . A household hood of the filtering type comprising a flue for evacuating fumes from rooms, the household hood comprising:
 a first stretch developing along a vertical direction from an inlet section;   at least one outlet opening for discharging said fumes along a substantially horizontal direction, said outlet opening having a height along said vertical direction and a width along a direction orthogonal to said vertical direction; and   a second joining stretch between said first stretch and said outlet opening;   wherein said height is less than 40 mm, and   wherein it comprises a pair of openings that are symmetrical with respect to a centreline plane arranged along said vertical direction, said second stretch having an upper surface, an intersection line between said centreline plane and said upper surface defining a nose of said flue.   
     
     
         2 . The household hood of  claim 1 , wherein the area of each outlet opening is comprised between 48 and 56 cm 2 . 
     
     
         3 . The household hood of  claim 1 , wherein the area of each outlet opening is equal to 52 cm 2 . 
     
     
         4 . The household hood of  claim 1 , wherein an adimensionalized distance between said inlet section and said nose is comprised between 0.7 and 0.75, said adimensionalized distance being calculated with respect to a distance between said outlet opening and a centreline plane of said flue. 
     
     
         5 . The household hood of  claim 3 , wherein said upper surface has a first connection placed at said nose, an adimensionalized radius of said first connection being comprised between 0.03 and 0.06, said adimensionalized radius being calculated with respect to a distance between said outlet opening and a centreline plane of said flue. 
     
     
         6 . The household hood of  claim 4 , wherein said upper surface has a first connection placed at said nose, an adimensionalized radius of said first connection being comprised between 0.03 and 0.06, said adimensionalized radius being calculated with respect to a distance between said outlet opening and a centreline plane of said flue. 
     
     
         7 . The household hood of  claim 1 , wherein said first stretch comprises an entrance zone close to said inlet section, said entrance zone having constant section along said vertical direction, said entrance zone having an adimensionalized length less than 0.3, said adimensionalized length of said entrance zone being calculated with respect to a distance between said outlet opening and a centreline plane of said flue.