随着国民经济的快速发展,城市综合体、异形建筑、大空间大跨度建筑大量涌现,玻璃幕墙和保温材料广泛应用,这都给建筑防排烟和消防灭火救援带来了新的挑战。近年来我国发生的多起重特大火灾事故中,由于火灾所产生的浓烟未被及时排出,火灾浓烟使人视线不清,找不到逃生之路,导致被困人员吸入浓烟中毒,甚至窒息死亡。此外,浓烟还给进入火场进行救援的人员增加阻碍,使救援人员看不见道路,行动延缓,看不见搜救目标,错过了宝贵的 With the rapid development of the national economy, a large number of urban complexes, special-shaped buildings and large-space long-span buildings have emerged. Glass curtain walls and thermal insulation materials are widely used. All these have posed new challenges for fire control and rescue of buildings. In recent years, many heavy fires in our country occurred in fire accidents. Since the smoke generated by the fire was not discharged in time, the smoke from the fire made people’s eyes blurred and could not find a way to escape. As a result, people trapped in the smoke were poisoned, Even choking death. In addition, the heavy smoke returned to the fire rescue personnel to increase the obstruction, so that rescue workers can not see the road, action delay, can not see the search and rescue objectives, missed the precious