What is the concept of fire emergency light?

Suitable for fire emergency lighting, it is the most common lighting tool in fire emergency, with long emergency time, high brightness and automatic emergency function when power is cut off. Fire emergency lights have the characteristics of low power consumption, high brightness and long service life. There are power switches and indicator lights on the side, which are suitable for emergency lighting in public places such as factories, hotels, schools and units. Fire emergency lights are made of industrial plastics and high-brightness bulbs. The color is mainly white with two arrows on the surface. The material is non-aging, with fast heat dissipation and impact resistance. Fire emergency lights have wall-mounted, portable and suspended installation methods. It has the advantages of reliable work, high stability and long service life. Suitable for high-rise buildings such as factories, hotels, shopping malls and buildings. It is used for emergency lighting in case of power failure. Metal lamp holder or flame-retardant plastic lamp holder is adopted, and there are wall-mounted, portable and suspended installation methods. Emergency time ≥90 minutes. Its principle can refer to the principle of electromagnetic relay, similar. The emergency lighting system used in China is mainly controlled by its own power supply. The normal power supply is connected from the ordinary lighting power supply circuit, and the emergency lamp battery is charged at ordinary times. When the normal power supply is cut off, the standby power supply (battery) automatically supplies power. This kind of emergency light has a large number of electronic components such as voltage transformation, voltage stabilization, charging, inverter, battery and so on. The battery needs to be charged and discharged when the emergency light is in use, maintenance and failure.

The other is the centralized control type with centralized power supply. Emergency lights have no independent power supply. When the power supply in normal lighting fails, it will be supplied by the centralized power supply system. In this form of emergency lighting system, all complicated electronic circuits inside the lamps are omitted, and the emergency lighting lamps are no different from ordinary lamps, and the centralized power supply system is set in a special room. Compared with independent control emergency lights with their own power supply, centralized control emergency lights with centralized power supply have the advantages of convenient centralized management, user self-inspection, fire supervision and inspection, prolonged lamp life and improved emergency evacuation efficiency. The system has good reliability, long service life, convenient maintenance and management, and low price. However, because there is no standby power supply (battery) in each emergency lamp, if the power supply line fails, it will directly affect the normal operation of the emergency lighting system, so there are special fire protection requirements for the laying of its power supply line. For the independently controlled emergency lights with their own power supply, there is no special requirement for the power supply line because there is a standby power supply (battery) in each emergency light, and the failure of the power supply line will not affect the standby power supply. When the emergency light fails, it generally only affects the light itself, but has little effect on the whole system. When selecting emergency lighting, the emergency lighting system should be selected reasonably according to the specific situation. Generally speaking, new projects or projects with fire control rooms should be uniformly wired during construction, and centralized power supply and centralized emergency lighting should be selected; For small places, late rectification or secondary renovation projects, independent control emergency lighting with its own power supply should be selected.