Patent ID: 11957945
Assignee: nan
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC A  F  B | IPC A  B  F

Claim 0:
1. A ceiling ventilation hood and fire protection system comprising:
a ceiling ventilation hood, the ceiling ventilation hood defining an upper plane and a lower plane with a filter disposed between the upper and lower planes; and
at least two nozzles mounted on the ceiling ventilation hood and spaced a distance apart, each having an outlet defining a discharge axis, the discharge axis extending towards a center of a hazard zone and intersecting an axis that is perpendicular to the filter at a location vertically beneath the lower plane of the ceiling ventilation hood, wherein the outlet is disposed in the ceiling ventilation hood between the upper and lower planes, the nozzles spaced and oriented at a height relative to the hazard zone to provide overlapping protection of the hazard zone, each of the nozzles defining a spray pattern to effectively address a fire within the hazard zone independent of airflow through the filter,
wherein the outlets of the at least two nozzles are positioned at least 54 inches above the hazard zone within a nozzle location zone, and wherein the outlets of the at least two nozzles are located on the same side of the filter; and
wherein the hazard zone has a hazard zone width corresponding to a width of a heating element of a kitchen appliance, the nozzle location zone being in an axial plane that extends perpendicular to the hazard zone, a radius between a geometric center of the nozzle location zone and a center of the hazard zone being at least twice the hazard zone width, a first vertical edge of the nozzle location zone being above the hazard zone, and a second vertical edge of the nozzle location zone being offset from the hazard zone, the nozzle location zone entirely disposed between the upper and lower planes of the ceiling ventilation hood, within distal ends of the ceiling ventilation hood, and proximate the filter relative to one of the distal ends of the ceiling ventilation hood.