1.前言灭火按其原理可分为冷却、窒息、除去可燃物三种方式.以往水、泡沫、粉末、二氧化碳等灭火设备就是以这三种灭火方式为主体的灭火设备.其中,虽然也有像粉末灭火设备是利用化学反应灭火的,但这些灭火设备都只是以灭火为目的.当然,灭火设备就应以灭火为目的.可是,近年来,要求灭火时应保护生命安全和建筑物,不用说,还要保护建筑物内 1. Introduction Fire extinguishing can be divided into cooling, suffocation and removal of combustibles in accordance with its principle. In the past, fire extinguishing equipment such as water, foam, powder and carbon dioxide was the fire extinguishing equipment mainly using these three fire extinguishing methods. Powder fire extinguishing equipment uses chemical reactions to extinguish fires, but these fire extinguishing equipments are only for the purpose of fire extinguishing. Of course, fire extinguishing equipment should be used for fire extinguishing purposes. However, in recent years, when fire extinguishing is required, life safety and buildings should be protected. Needless to say , but also to protect the building