The carbon dioxide in the fire extinguisher is generally in liquid cans. Liquid carbon dioxide is extremely volatile. This gas is 760 times larger than the original liquid. When it was ejected from the fire extinguisher, part of it became a white snowflake (also called dry ice) and the temperature was very low. Dry ice absorbs heat and atomizes into carbon dioxide gas, covering the surface of the burning material. Carbon dioxide gas has the function of diluting and removing air, reducing the percentage of oxygen or combustible gas. When carbon dioxide accounts for 30%-35% of the air concentration, The burning will stop. Therefore, carbon dioxide has suffocating and cooling effects. Use it to extinguish the fire, leaving no trace afterwards, no corrosion or damage.
It can extinguish the fire, mainly because it contacts the burning material, generates bromide ions when heated, and immediately combines with the hydrogen radicals that occur during combustion, so that the combustion chain reaction is quickly stopped, the fire is extinguished, and there is a certain amount of cooling and suffocation. effect. Use it to extinguish fires of precision instruments, cultural relics and archives. The fire extinguishing efficiency is more than four times higher than that of carbon dioxide, leaving no traces after the fire.