Hoods for extracting cooking fumes, comprising first and second suction units
A hood for extracting cooking fumes may include: a base having an intake opening; a conduit connected to the base, with a discharge opening in fluid communication with the intake opening; and first and second suction units in the conduit to respectively generate first and second air flows that cross the conduit from the intake to the discharge openings. The first suction unit may be closer to the intake opening than the second suction unit. The first and second suction units may partially overlap along a transverse direction. The hood further may include separating members in the conduit to define first and second suction chambers, each in fluid communication with the intake and discharge openings. The first air flow may cross the first suction chamber from the intake to the discharge opening. The second air flow may cross the second suction chamber from the intake to the discharge opening.
1 . A hood for extracting cooking fumes, the hood comprising:
a base having an intake opening and facing a hob;
a conduit connected to said base and presenting a discharge opening placed in fluid communication with said intake opening of said base, said conduit extending along a longitudinal direction (X-X), said discharge opening being arranged on an opposite side of said conduit with respect to said intake opening along the longitudinal direction (X-X);
a first suction unit and a second suction unit arranged in the conduit and configured to respectively generate a first air flow and a second air flow that cross the conduit from the intake opening to the discharge opening, the first and second suction unit extending in parallel along a depth direction (Z-Z) perpendicular to the longitudinal direction (X-X);
wherein the first suction unit is placed closer to the intake opening than the second suction unit, and the second suction unit is spaced from the first suction unit along the longitudinal direction (X-X),
wherein the first suction unit and the second suction unit are partially overlapping along a transverse direction (Y-Y) that is perpendicular to the longitudinal direction (X-X) and to the depth direction (Z-Z),
wherein the hood further comprises separating members arranged in the conduit to define a first suction chamber and a second suction chamber,
wherein each of the first and second suction chambers is placed in fluid communication with the intake opening and the discharge opening,
wherein the first suction unit is placed in the first suction chamber, and the first air flow crosses the first suction chamber to flow from the intake opening to the discharge opening,
wherein the second suction unit is placed in the second suction chamber, and the second air flow crosses the second suction chamber to flow from the intake opening to the discharge opening, wherein the separating members comprise a first dividing element and a second dividing element separate from the first dividing element, and
wherein each of the first dividing element and the second dividing element is substantially L-shaped and comprises a first wall oriented along the longitudinal direction (X-X) and a second wall oriented along the transverse direction (Y-Y), and wherein the first wall of the second dividing element is connected to the second wall of the first dividing element to separate the first suction chamber and the second suction chamber.
2 . The hood of claim 1 , wherein:
the first suction unit comprises a first impeller configured to rotate about a first rotation axis oriented parallel to the depth direction (Z-Z) to generate the first air flow, the first rotation axis lying at a first distance from the intake opening;
the second suction unit comprises a second impeller configured to rotate about a second rotation axis oriented parallel to the depth direction (Z-Z) to generate the second air flow, the second rotation axis lying at a second distance from the intake opening; and
the second distance is greater than the first distance.
3 . The hood of claim 2 , wherein the conduit extends along the transverse direction (Y-Y) over a length between 300 mm and 600 mm.
4 . The hood of claim 2 , wherein:
the first impeller and the second impeller have a first and second radial extension, respectively; and
the first rotation axis and the second rotation axis are spaced along the transverse direction (Y-Y) over a length between 25% and 75% of a sum of the first and second radial extensions.
5 . The hood of claim 1 , wherein the first and second suction chamber respectively comprise a first inlet and a second inlet in fluid communication with the intake opening of the base, the first suction chamber and the second suction chamber extending along the longitudinal direction (X-X) from the first inlet and the second inlet respectively for a first stretch and a second stretch, the second stretch presenting a greater length than the first stretch.
6 . The hood of claim 5 , wherein the first inlet has a surface extent equal to 1.5-3 times a surface extent of the second inlet.
7 . The hood of claim 1 , wherein
the first dividing element is connected internally to the conduit to define the first suction chamber; and
the second dividing element is connected internally to the conduit to define the second suction chamber.
8 . The hood of claim 7 , wherein the first wall and the second wall of each dividing element extend from side to side of the conduit along the depth direction (Z-Z).
9 . The hood of claim 1 , further comprising:
a first discharge conduit arranged in the conduit and configured to convey the first air flow from the first suction chamber to the discharge opening; and
a second discharge conduit arranged in the conduit and configured to convey the second air flow from the second suction chamber to the discharge opening.