Capacitance type fire-fighting emergency headlamp

Abstract

The invention discloses a capacitive-type fire-control emergency illuminating lamp, comprising a current-limiting over-voltage protective circuit, the output end of which is electrically connected with a rectifying circuit, the output end of the rectifying circuit is electrically connected with an energy storage capacitor and a commercial power detection circuit respectively, the output end of the commercial power detection circuit is electrically connected with an LED drive circuit, the output end of the LED drive circuit is electrically connected with LED lamp sets. The invention can remarkably prolong the service life of the fire-control emergency illuminating lamp and has the characteristics of high brightness and simple circuits, which is an updating and upgrading product of conventional fire-control emergency illuminating lamp.

Description

technical field [0001] The invention belongs to the field of emergency lamp manufacturing, and relates to a fire-fighting emergency lighting lamp, in particular to a capacitive fire-fighting emergency lighting lamp. Background technique [0002] Fire emergency lighting is to provide emergency lighting for the evacuation of people and materials in a fire building in the event of a fire. As an electronic device that is closely related to the safety of people's lives and property, we naturally hope that it has high reliability. , long life, simple maintenance features. However, almost all traditional fire emergency lights use nickel-cadmium batteries as energy storage devices, which inevitably have the following disadvantages: [0003] 1. The charging control circuit of NiCd batteries is relatively complicated. It is necessary to have an overcharge protection circuit and an overdischarge protection circuit to ensure the service life and performance of the nickel-cadmium batte...

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Problems solved by technology

[0004] 2. Due to the memory effect of nickel-cadmium batteries, if the battery is charged before the battery is fully discharged, the capacity of the battery will be greatly reduced. If you want to overcome the memory effect of the battery, you must design a discharge detection control circuit to ensure that the battery can be fully discharged before recharging, however, this makes the circuit of the fire emergency lighting more complicated and more expensive

[0005] 3. The charging time of nickel-cadmium batteries is as long as ten hours. The national standard stipulates that the charging time of fire emergency lights should not exceed 24 hours. The emergency time of fire emergency lights has a certain influence

[0006] 4. Cadmium in nickel-cadmium batteries is a toxic heavy metal element, and nickel-cadmium batteries will pollute the environment during the production process and after they are scrapped

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