The
patent application relates to the technical field of A62C3 / 00, in particular to a fire extinguishing device for
spontaneous combustion of an automobile. The fire extinguishing device comprises a high-pressure gas device, a
dry powder tank, a
metal hose and an air flow channel, wherein the outlet of the high-pressure gas device is connected with the inlet of the air flow channel, the bottom ofthe
dry powder tank is connected with the side wall of the air flow channel, and the outlet of the air flow channel is connected with the
metal hose; the high-pressure gas device comprises an expansion
thermometer, a
cam is arranged on the outer ring of the expansion
thermometer, a first working diaphragm is arranged on the high-pressure gas device, a first steel needle is arranged on the first working diaphragm, a box body is arranged on one side close to the tip of the first steel needle, and a film is arranged on the part of the box body facing the first steel needle; and a rotating plate is arranged on the air flow channel corresponding to the
dry powder tank, a second steel needle is arranged on the rotating plate, and a second working diaphragm is arranged at the bottom of the dry
powder tank. According to the fire extinguishing device provided by the invention, dry
powder and high-pressure gas are separately arranged, and then the high-pressure gas drives the dry
powder into themetal hose according to the Bernoulli principle, thereby achieving the effect of quickly extinguishing fire.