Today is the day for the inspection of fire extinguishers (the fire extinguishers originally required a monthly inspection, and now the fire extinguishers required a semi-monthly inspection), because the most used fire extinguishers we have ever used are dry powder extinguishers and carbon dioxide. For dry powder extinguishers, we do not need to know the composition of dry powder, just know how to use it. I estimate that this dry powder extinguisher training is also the most highly trained. The co2 extinguishers are used on special occasions, in the information machines and distribution rooms, where they are most used at the mall, and are generally used by professionals。
We will now focus on co2 extinguishers, because they are relatively new to everyone, and because of their performance and the principle of fire suppression, they are used mainly among precision equipment such as power distribution rooms, machinery rooms and so forth, mainly because co2 can be extinguished, much less residual。
Imagine that if there was a fire in the room, we used a fire extinguisher, which was extinguished, but it was possible that the circuit board could not be repaired because of the residue of dry powder and that the replacement of the board could be too expensive。
Maybe somebody would ask, "doesn't the carbon dioxide spray fly away with a carbon dioxide extinguisher?" that's just like me, middle school physics isn't good, and i've been searching the internet for co2 density more than air, so don't worry about it running away。
(the following is a web copy, a summary is in place, it's not embarrassing
1. The rationale for co2 extinguishers and their effects on humans
The rationale for co2 extinguishers is to liquidate or sequester co2 through high pressure, which is then released when required. During the release process, co2 is rapidly elevated from liquid or solid to gaseous, and this process absorbs large amounts of heat, leading to a sharp decrease in temperature in the surrounding environment. When human skin is exposed to these super-cool gases, skin tissues freeze quickly, resulting in freezing injuries. Especially when there are fewer blood circulations like fingers。
Preventive measures and approaches
In order to reduce the risk of freezing injuries, co2 extinguishers should be used as follows:
1. Keep safe distance: avoid direct firing of fire extinguishers at humans。
2. Clothes for protective gear: when used, wear appropriate protective clothing, such as thick gloves and protective clothing。
3. Avoid prolonged exposure: minimize exposure time in low temperature environments。
4. Timely treatment of tundra: if it is not thawed, it should be removed from the cold immediately, warm and warm to promote reheating and seek medical assistance。
Of course, co2 is known to be asphyxiating, so when co2 extinguishers are used in closed spaces, it is necessary to escape the oxygen-deficit environment in time。
I don't know if i'm making myself clear
