5 Application characteristics of LED light source in coal mining face lighting
(1) Safety: The circuit used for the intrinsically safe LED lighting is intrinsically safe. At the same time, due to the long service life of the LED, it is not necessary to replace the lamps frequently, which greatly reduces the problem of safety accidents caused by underground lighting maintenance of coal mine workers. The filament temperature of the incandescent light bulb is higher than 2 000 ° C, and the LED is a cold light source, and its light emission temperature is only 60 ° C. When the cover glass is broken, the gas will not ignite and explode. (2) Energy saving, the working current of LED is about 1/3 of the working current of incandescent bulbs, which saves 2/3 of the power. (3) The disadvantages of LEDs as the light source of coal mining face lighting are as follows: first, the cost is high, the price of an intrinsically safe LED lighting is several times that of ordinary lamps; Due to the different LEDs selected, the light will not be soft and dazzling, and the workers are not used to it when it is used underground. But there are solutions to these two problems. For the problem of high prices, from the perspective of unit price alone, if the comprehensive cost of LED lighting is analyzed, the problem is not the case. Due to the long service life of LEDs, they do not need to be replaced as often as other miner's lamps, and the working current of LEDs is small, which greatly saves energy. In addition, LED lamps are maintenance-free during use. Overall, the overall cost of LED lighting is still higher than other lighting. The cost of the lamp is low. For the problem of dazzling light, in the selection of LED, you can choose a lower color temperature according to the situation. The color temperature is high, and the light is dazzling. When the color temperature is below 6 000 K, the dazzling feeling is obviously reduced, and the user also has a process of adaptation.
In addition, the function of the professional optical design lampshade is to add a professional optically designed light interceptor on the inner wall of the standard lampshade. When the light passes through the light interceptor, the material of the light interceptor is set to a high reflectance at a special angle The aluminum surface layer can eliminate glare from any angle, and the glare light no longer enters the eyes, and of course protects the eyes; at the same time, the light is also guided by the light interceptor into effective vertical light to ensure that the illuminated area is soft and bright.