Kitchen hood ventilator

Claim 1

A kitchen hood ventilator comprising: a casing including top and bottom walls, side walls, and a rear wall, and including a warm air inlet located adjacent the lower front corner, a cool air inlet located adjacent the upper rear corner, and an air outlet located adjacent the upper front corner; a partition mounted in the casing and extending between an opening and the air outlet of the casing; filter means mounted in the casing in the path of warm air flowing through the warm air inlet thereof; a cool air duct mounted in the casing and extending from the cool air inlet downwardly along the rear wall of the casing and then parallel to and above the bottom wall of the casinG to a cool air outlet; a propeller fan mounted in the opening of the partition for moving warm air through the warm air inlet, the filter and the air outlet and for moving cool air through the cool air inlet, the cool air duct having predetermined load characteristics; and a fan motor supported on the cool air duct in the cool air outlet thereof and therefore in the path of cool air flowing through the cool air duct under the action of the propeller fan, said motor for rotating the propeller fan and having predetermined output power characteristics, the load characteristics of the propeller fan and the output power characteristics of the fan motor being so interrelated that substantially the full capacity of the fan motor is required to rotate the propeller fan.