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Working principle of automatic fire extinguisher

Fire extinguishers are more common in life, but you may not know much about the working principle of fire extinguishers. Next, let me briefly introduce you to the editor.Automatic fire extinguisherThe working principle.

Dry powder fire extinguisher

The dry powder fire extinguisher is filled with dry powder extinguishing agent. Dry powder extinguishing agent is a dry and easy-to-flow fine powder used for extinguishing fire, which is composed of inorganic salt with fire extinguishing effect and a small amount of additives through drying, crushing and mixing to form fine solid powder. Use compressed carbon dioxide to blow out dry powder to extinguish fire.


Foam fire extinguisher

There are two containers in the foam fire extinguisher, which are filled with two liquids, aluminum sulfate and sodium bicarbonate solution. The two do not contact and no chemical reaction occurs. When a foam fire extinguisher is needed, turn the fire extinguisher upside down. When the two solutions are mixed together, a large amount of carbon dioxide gas will be generated. Foam fire extinguishers extinguish fire according to some chemical reaction methods. In addition to these reactants, some foaming agent is also added to the fire extinguisher. When the switch is turned on, foam is sprayed from the fire extinguisher and covers the burning items to isolate the burning material from the air, reduce the temperature, and achieve the purpose of extinguishing the fire.

Carbon dioxide fire extinguisher

Carbon dioxide has a high density, carbon dioxide as a gas can effectively exclude air and surround the surface of the object in the continuous combustion process or distributed in a relatively closed space, reduce the oxygen concentration around the combustible or in the protective space, and play a role in extinguishing fire.

The above is a brief introduction to youAutomatic fire extinguisherThe whole content of the working principle, I hope it can be helpful to you. If you want to know about other aspects, welcome to consult us. We look forward to cooperating with you.

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1. When using a portable dry powder fire extinguisher, one is to pull up the pull ring and the other is to press the handle. What we are using now is the push-down handle type. When the pressure is pressed down, the dry powder will be sprayed out. But it should be noted that the safety pin needs to be pulled out first, otherwise it will not spray dry powder.

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Many units or individual families will be equipped with dry powder fire extinguishers, but according to statistics, 80% of people do not know the scope of application of dry powder fire extinguishers and which types of fires can be extinguished. There are also reports that due to the improper use of fire extinguishers, the fire has increased and the loss has been miserable. There will also be corresponding instructions on the cylinder label of normal dry powder fire extinguishers, but there are still many friends who do not look carefully or do not look carefully, which brings potential dangers to the fire fighting work.

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