SMOKE EXHAUSTING METHOD IN LARGE SPACE IN WHICH MIST-LIKE WATER OR NONCOMBUSTIBLE GAS BECOMES SOURCE OF TORNADO

摘要

PURPOSE:To efficiently exhaust the smoke without exerting a hindrance on damage of human life and a refuge action of a man, and also, while suppressing combustion. CONSTITUTION:A turning flow is caused by inducing the surrounding air by water atomization or noncombustible gas injected from an injection nozzle 4 provided toward on roughly a tangent of the same circle drawn on the lower face in an atrium 2. On the other hand, by a smoke exhaust machine 3 provided on the upper part of the atrium concerned 2, a negative pressure zone is generated, a tornado is generated by a synergistic action of the turning flow and the negative pressure zone and by the tornado concerned, smoke generated from a fire is concentrated in the vertical direction of the center part of the atrium concerned 2 and the smoke concerned is exhausted from the smoke exhaust machine 3 of the upper part. Also, in an ultrahigh building, etc., this equipment is constituted so that an air injection nozzle is provided toward the direction of the smoke exhaust machine 3 of the upper part in the middle of the atrium 2, a new tornado is generated by injecting usual air therefrom and diffusion of smoke in the middle of the atrium is prevented.