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随着卤代烷灭火剂的逐渐淘汰,二氧化碳灭火系统得到更加广泛的应用。它具有洁净、廉价、维修简便等特点,在封闭空间里扑救电气设备、可燃液体及初期A类火灾均十分有效。由于二氧化碳灭火系统的灭火原理主要是靠稀释空气中氧气的含量,使氧气浓度在很短的时间内下降到物质燃烧所必需的浓度以下,从而使火焰熄灭,因此二氧化碳灭火系统的设计灭火浓度一般在34％以上当空气中二氧化碳的浓度达到25％以上时,人体将很快出现中毒反应,可能在数秒钟内导致昏迷、惊厥、甚至死亡。因此,二氧化碳灭火系统一般只适用于平时无人工作的封闭空间,如配电间、变压器等。
With the gradual elimination of halogenated fire extinguishing agents, carbon dioxide fire extinguishing system has been more widely used. It is clean, cheap, easy to maintain and so on. It is very effective in combating electrical equipment, flammable liquids and initial Class A fire in confined spaces. Because the principle of fire extinguishing carbon dioxide fire extinguishing system is mainly by diluting the content of oxygen in the air, the oxygen concentration in a very short period of time down to the necessary concentration below the concentration of the material, so that the flame extinguished, so the design of fire extinguishing system CO2 concentration generally Above 34%, when the concentration of carbon dioxide in the air reaches more than 25%, the human body will soon have a toxic reaction that may lead to coma, convulsions and even death within a few seconds. Therefore, the carbon dioxide fire extinguishing system is generally only applicable to the usually unoccupied closed space, such as distribution rooms, transformers and so on.