Simple fire extinguishers are portable fire extinguishers developed in recent years. It is characterized by a small fire extinguisher with an extinguishing agent filling capacity of 500 grams or less and a pressure of 0.8 MPa or less, which is a one-time use and cannot be refilled. According to the type of fire extinguishing agent, simple fire extinguisher has 1211 fire extinguisher, also called aerosol halon fire extinguisher; simple dry powder fire extinguisher, also known as portable dry powder fire extinguisher; and simple air foam fire extinguisher, also known as portable air foam Fire extinguisher. The simple fire extinguisher is suitable for home use. The simple 1211 fire extinguisher and the simple dry powder fire extinguisher can save the initial fire of the liquefied petroleum gas stove and the upper valve of the cylinder, or the gas stove, etc., and can also save solids such as hot pot fire and waste paper basket. Combustible fire. Simple air foam is suitable for initial fires caused by oil pans, kerosene stoves, oil lamps, and candles, as well as for the burning of solid combustibles.