Before we shared the intelligent products such as smart door locks and electric curtains used in smart homes , we will share the commonly used home fire detectors, such as smoke detectors, temperature detectors and gas leak detectors. Today we will talk about the smoke detector first.
First of all, the classification of smoke detectors is generally classified into a bit type and a line type from the detection range, and the point type is further divided into an ion sense smoke and a photo-electricity smoke, and the line type is further divided into a laser smoke detector and a separate infrared beam smoke detector. Most of the smoke detectors suitable for our family use are photo-electric smoke detectors.
How does the photo-electric smoke detector work?
The photo-electricity smoke detector is developed by utilizing the basic property that the smoke generated during the fire can change the propagation characteristics of the light. When the smoke concentration reaches a certain degree, the photo-electric smoke detector emits an alarm signal. According to the absorption and scattering of light by smoke particles. Photoelectric smoke detectors are divided into two types: shading type and astigmatism type. According to different access modes and battery power supply methods, it can be divided into networked smoke, independent smoke, and wireless smoke.
The networked smoke detector is generally suitable for the large-scale fire alarm system. It is simple to understand that it needs to be used with the central control host and cannot work independently, but the front-end signal acquisition has no field output function.
Independent smoke detector, generally suitable for home use, can collect alarm signals on the spot, and send out alarm sound and light on site, easy to install.
Wireless smoke detector is generally suitable for small household wireless alarm system, which is used with the central control host and wireless communication with the control host.
The structure diagram of the photo-electricity smoke detector is as follows. When the smoke is generated in the early stage of the fire, the smoke enters the storage chamber, and the photosensitive element cannot receive the infrared light normally, and the detector gives an alarm.
Photoelectric Smoke Detector Installation Precautions:
1. The horizontal distance between the detector and the wall and the beam should not be less than 5 meters; there should be no obstruction within 0.5 m of the horizontal distance around the detector.
2. The horizontal distance from the detector to the nearest side of the air supply air inlet should not be less than 5 meters; the horizontal distance to the aperture of the porous air supply top grid should not be less than 0.5 meters.
3. Smoke detectors should not be installed in places where smoke and water vapor concentration are high.
4. The detector should be installed horizontally. When it is really necessary to install it obliquely, the angle of inclination should not exceed 45 degrees.
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