Smoke detectors, also known as smoke detectors, smoke detectors, smoke detectors, smoke detectors, and smoke detectors, are primarily used in fire protection systems and are also used in the construction of security systems.
The main types of smoke detectors:
1. The ion-smearing smoke-type smoke detector is a point-type detector. It contains a small amount of radioactive material in the ionization chamber, which can make the ionized room air become a conductor, allowing a certain current to pass through the air between the two electrodes. The local air is ionized, and the ion flow is formed by the voltage, which gives the ionization chamber an effective conductivity. When the smoke particles enter the ionizing zone, they reduce the electrical conductivity of the air due to the bonding with the ions, resulting in the weakening of the ion movement. When the conductivity is below a predetermined value, the detector issues an alarm.
2. The photo-inductive smoke photo-electric smoke detector is also a point type detector, which was developed based on the basic property that the smoke generated when a fire can change the propagation characteristics of light. According to the absorption and scattering of light by smoke particles. Optical smoke detectors are classified into two types: light-blocking and astigmatism.
3. Infrared beam-smearing infrared beam smoke detectors are linear detectors, which are fire detectors that respond to flue gas parameters around a narrow strip in the alert range. It differs from the previous two types of point-type smoke detectors in that the linear smoke detector divides the light emitter and the photoreceptor into two separate parts. When used, the two parts are installed opposite to each other and the middle part is connected by a light beam. stand up. Infrared beam smoke detectors are divided into two types: radiation type and reflection type. Smoke-detection type fire detectors are suitable to be installed in places where there is a large amount of smoke or smoldering after the occurrence of a fire; it is not suitable to install in places where the smoke is usually large or the ventilation speed is high.
The main types of smoke detectors:
1. The ion-smearing smoke-type smoke detector is a point-type detector. It contains a small amount of radioactive material in the ionization chamber, which can make the ionized room air become a conductor, allowing a certain current to pass through the air between the two electrodes. The local air is ionized, and the ion flow is formed by the voltage, which gives the ionization chamber an effective conductivity. When the smoke particles enter the ionizing zone, they reduce the electrical conductivity of the air due to the bonding with the ions, resulting in the weakening of the ion movement. When the conductivity is below a predetermined value, the detector issues an alarm.
2. The photo-inductive smoke photo-electric smoke detector is also a point type detector, which was developed based on the basic property that the smoke generated when a fire can change the propagation characteristics of light. According to the absorption and scattering of light by smoke particles. Optical smoke detectors are classified into two types: light-blocking and astigmatism.
3. Infrared beam-smearing infrared beam smoke detectors are linear detectors, which are fire detectors that respond to flue gas parameters around a narrow strip in the alert range. It differs from the previous two types of point-type smoke detectors in that the linear smoke detector divides the light emitter and the photoreceptor into two separate parts. When used, the two parts are installed opposite to each other and the middle part is connected by a light beam. stand up. Infrared beam smoke detectors are divided into two types: radiation type and reflection type. Smoke-detection type fire detectors are suitable to be installed in places where there is a large amount of smoke or smoldering after the occurrence of a fire; it is not suitable to install in places where the smoke is usually large or the ventilation speed is high.
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