Collecting hood

A collecting hood for capturing the exhaust air above cooking areas, production devices and the like, said collecting hood comprising a vapor chamber, an extraction chamber and an air supply chamber which extend horizontally and parallel to one another in a longitudinal direction, wherein:

• the vapor chamber is downwardly open and tapers upward,
• the extraction chamber is separated from the vapor chamber by a filter or a separator, wherein the filter or the separator forms an inclined boundary of the upwardly tapering vapor chamber, and
• the air supply chamber tapers downward and merges at its bottom end into a curved deflection region which opens out into a discharge opening which is arranged at a bottom end of the vapor chamber opposite the extraction chamber such that supply air which is blown from above into the air supply chamber, emerges from the discharge opening horizontally or upwardly at an angle in the direction of the filter or of the separator,
• and further comprising a negative pressure chamber which is arranged between the vapor chamber and the air supply chamber, wherein the negative pressure chamber is closed on all sides with the exception of a suction opening at its bottom end which opens out in the region of an inner radius of the curved deflection region of the air supply chamber into said deflection region, and wherein the negative pressure chamber and the air supply chamber are separated from one another along an induction region, which connects upwardly to the suction opening or to the deflection region, by a wall which comprises a plurality of individual apertures which are arranged consecutively in the longitudinal direction of the collecting hood.