燃烧的产物一般为气体、热量和烟,气体上含有大量的一氧化碳、二氧化碳、二氧化氮等有毒气体,它们与可见烟混合在一起构成的烟气可致人窒息,而火灾时产生的烟气致人窒息是火灾时造成人员伤亡的直接和重要的原因。如2004年2月15日,吉林市中百商厦造成54人死亡的特大火灾事故中多数人是由于烟气窒息而死亡的。由此可见,严格按照有关消防法规设置排烟设施是非常必要的。 The product of combustion is generally gas, heat and smoke. The gas contains a large amount of toxic gases such as carbon monoxide, carbon dioxide and nitrogen dioxide. The fumes which are mixed with visible smoke can cause suffocation, and the fumes generated in the fire Choking is a direct and important cause of casualties in a fire. For example, on February 15, 2004, most of the 54 people who died in the Zhongbai Commercial Building in Jilin City died of smothering fumes. This shows that strict accordance with the relevant fire safety regulations to set the smoke exhaust facilities is very necessary.