The smoke alarm is one of the most common fire early warning devices. It can accurately sense the smoke generated by the fire in the early stage of the fire, and quickly give people an early warning to prevent the spread of the fire.
What is a smoke alarm?
1. The development process of fire is roughly divided into the initial stage, the development stage and the decay and extinction stage.
2. The smoke alarm can sense the initial smoke generation stage of the fire, and automatically send out a fire alarm signal to put out the fire before it becomes a disaster.
3. According to different structures, smoke alarms can be divided into ion detectors and photoelectric detectors.
ion detector
The ion-type smoke detector is composed of two series chambers containing Am241 radioactive sources, field effect tubes and switch circuits.
When a fire occurs, the smoke enters the detection ionization chamber, causing the change of the voltage divider ratio applied at both ends of the two ionization chambers. When the voltage increase across the detection ionization chamber reaches a certain value, the switch circuit operates and an alarm signal is issued.
photoelectric detector
Photoelectric smoke detectors are composed of light sources, photoelectric elements and electronic switches.
Photoelectric smoke detectors use the principle of light scattering to detect the smoke generated in the early stage of a fire and issue an alarm signal.
Pay attention to installation
1. Kitchen: It is recommended to install the smoke alarm more than 3 meters away from the cooking utensils.
2. Single-storey residences: Smoke alarms should be installed between corridors, sleeping and living areas, preferably on the ceiling, at least 30cm away from walls or lamps.
3. Large-scale or multi-storey residences: In addition to the installation location of single-storey residences, the connection between the bottom of the stairs and each floor of the stairs should also be installed. Also, buy interconnected alarms!
S4A reminds you
No matter where the smoke alarm is installed, it must not be installed above the object that will generate steam, otherwise false alarms will easily occur.
Author:Written by Ms.Rebecca Fu from S4A INDUSTRIAL CO.,LIMITED
Factory Address:Building S4A, South Third Lane, Qiuyuling Street, Zhangkeng Village, Hengli Town, Dongguan City, Guangdong Province Office Address:#601,floor 6 ,building 1,JINFANGHUA industrial zone, Bantian St. Longgang Dist. Shenzhen, PRC.
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