Smoke ventilation
AssigneeDavid John Royle
InventorsDavid John Royle, Danish Ahmad
Life of this patent
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Abstract
The invention provides door and window sensors, which can be incorporated into building pressurisation and depressurisation systems, for use in protecting a building's escape routes against smoke ingress during a fire.
Claims9
1-37. (canceled)
An apparatus for ventilating an escape route of a building, the apparatus comprising sensing means for detecting the position of a plurality of doors in the escape route of the building, and control means for variably controlling a velocity of air leakage in the escape route of the building, using a ventilator fan, to be at least 2 ms−based on the position of the doors detected by the sensing means to maintain pressure in the escape route at a level sufficient to prevent ingress of smoke into the escape route from outside of the escape route when one or more of the doors are opened,
- wherein the plurality of doors comprise sliding doors,
- wherein the sensing means comprises a plurality of sensors, each respectively attached to a corresponding one of the plurality of doors, wherein each sensor is capable of sensing the position of the corresponding door to which it is fitted with respect to the corresponding door frame, and
- wherein the ventilator fan is coupled to receive an output of at least one of the sensors so that the ventilator fan is switched on when the corresponding door is opened and as soon as an opening is created between the corresponding door and a door frame in which the door is located.
Dependencies are inferred from the claim text.