Building ventilation system with air inlet flap control

Details Building ventilation system with air inlet flap control Building ventilation system with air inlet flap control

F - Mech Eng,Light,Heat,Weapons

24

F

98/33

F24F 7/007 (2006.01)

Patent

CA 1282992

ABSTRACT OF THE INVENTION In a ventilation system for a building in which air is extracted by a fan arrangement, an inlet flap arrangement is provided for a ceiling opening which comprises a foamed material flap member mounted directly covering the ceiling opening. The flap member is controlled by a tension spring biasing it to a closed position so that its weight and air pressure act to open the flap. The angle of the spring relative to the position of the centre of gravity of the flap member are controlled to provide the required opening characteristics. In one arrangement the flap member is shaped as a scoop so as to direct air along the ceiling when opened.

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