To ensure the effectiveness of portable fire extinguishers, we need to regularly maintain and inspect them. Check whether the pressure of the fire extinguisher is normal, whether the nozzle is unobstructed, and whether the bottle body is corroded or damaged. Meanwhile, it is important to pay attention to the shelf life of fire extinguishers and promptly replace expired or damaged ones.

There are many kinds of portable fire extinguishers, including dry powder fire extinguishers, foam fire extinguishers and carbon dioxide fire extinguishers. These fire extinguishers each have their own characteristics and are suitable for different types of fires. Dry powder fire extinguishers are suitable for solid, liquid, and gas fires, with the advantages of fast extinguishing speed and easy operation; Foam fire extinguishers are mainly used to extinguish liquid fires. They can generate foam to cover the surface of combustibles and isolate the air to extinguish the fire; Carbon dioxide fire extinguishers are particularly suitable for electrical fires, as their non-conductive properties can prevent secondary damage to electrical equipment.

For different locations and uses, we also need to pay attention to specific types of fire extinguishers. For example, flammable places such as kitchens may require the use of specialized kitchen fire extinguishers to deal with specific types of fire sources such as grease fires. In some special industries, such as chemical and medical industries, special fire extinguishing equipment may also be required to cope with specific types of fire risks.

When using a fire extinguisher, we need to follow certain operating procedures. Firstly, after discovering a fire, it is important to quickly determine the size of the fire and the type of fire source, and select the appropriate fire extinguisher. Then, operate in the order of "pulling, gripping, aiming, and scanning". Pull out, that is, pull out the safety pin of the fire extinguisher; Grip, that is, grip the nozzle and align it with the base of the flame; Aiming, that is, aiming at the source of fire; Sweeping, that is, sweeping left and right, gradually pushing forward until the flame is extinguished. During the firefighting process, it is important to remain calm, pay attention to personal safety, and avoid letting the fire spread.

Dry powder fire extinguishers are suitable for solid material fires, liquid fires, and gas fires. They have good extinguishing effects and are easy to operate, making them widely used in various places. Foam fire extinguishers are suitable for liquid fires. They can generate foam to cover the surface of combustibles and isolate air to extinguish the fire. Carbon dioxide fire extinguishers are suitable for electrical fires, as their non-conductive properties prevent secondary damage to electrical equipment during the extinguishing process.