The dry powder fire extinguisher is equipped with dry powder fire extinguishing agent such as ammonium phosphate. This dry powder fire extinguishing agent is easy to flow and dry, and consists of inorganic salts and grinding and drying additives, which can effectively put out the initial fire.

carbon dioxide gas can exclude air and surround the surface of a burning object or distribute in a relatively closed space, so as to reduce the oxygen concentration around combustible materials or in a protective space, and produce asphyxiation to extinguish the fire.

In addition, when carbon dioxide is ejected from the storage container, it will be quickly vaporized from the liquid into gas, and absorb some heat from the surrounding to play a cooling role.