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A life-saving smoke alarm in a fire



https://vedard.com/blog/a-life-saving-smoke-alarm-in-a-fire/
Why are so many people trapped in an indoor fire? According to statistics, =
more than 80 percent of those who died in the fire were smoke-choked. Fire =
combustion products contain a large number of toxic components, such as car=
bon monoxide, carbon dioxide, hydrogen cyanide, sulfur dioxide, nitrogen di=
oxide, etc., these gases have different degrees of harm to human body. One =
of the most toxic gases is carbon monoxide. Carbon dioxide is non-toxic, bu=
t when it reaches certain concentrations, it can stimulate a person=E2=80=
=99s respiratory center, resulting in shortness of breath, increased smoke =
inhalation, headaches, confusion and other symptoms. The vertical flow rate=
 of flue gas is 3-5 meters per second, which is 8-10 times the horizontal f=
low rate.When the toxic smoke fills the entire evacuation channel, people m=
ay faint if they stay 1-2 minutes, and people may die if they stay 4-5 minu=
tes.
Electrical and living fire carelessness is the two main causes of residenti=
al fire. The specific causes of electrical fire include line failure, elect=
rical equipment failure, heating appliances used for a long time or too clo=
se to fuel, etc. The specific causes of careless use of fire in life are oi=
l pan fire, baking, improper use of stoves, smoking, spontaneous combustion=
, playing with fire and so on. There are a lot of flammable objects in the =
room, some furniture, plastic combustion will produce a lot of smoke. The s=
moke would have lowered the line of sight so much that it was hard to see f=
rom a meter away. After the occurrence of an indoor fire, the escape time i=
s limited. Under normal circumstances, the ordinary residence fire will def=
lagration in about three and a half minutes, and the chance of escaping aft=
er deflagration is very low.
The following measures can effectively reduce the occurrence of residential=
 fires: timely replacement of aging and damaged electrical lines, replaceme=
nt of old electrical appliances, regular inspection of gas lines, no smokin=
g in bed, teaching children not to play with fire, keeping away from combus=
tible materials when baking and heating, checking the use of electricity an=
d gas before going to bed or going out, etc.
In addition, fire detection and alarm equipment should be installed in the =
home for early warning and early detection. Once there is a fire, the alarm=
 device will trigger the alarm, even in the middle of the night people can =
evacuate and call fire police. Smoke alarms are the most commonly used fire=
 alarm detectors. According to fire protection association, A smoke alarm s=
hould be installed in every bedroom, a smoke alarm should be installed outs=
ide the bedroom where the alarm can be heard through the door. At least one=
 smoke alarm should be installed on each floor of the residence. The closer=
 the alarm is to the fire, the faster it will work.Therefore, as many fire =
smoke alarms as possible should be installed in the residence.

There are many types of smoke detectors. Refer to another article at Fire s=
afety cannot be ignored.


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