Heat Sink Using Latent Heat of LED Street Light

Abstract

There is provided a heat sink using latent heat of an LED street light, wherein a phase change material (PCM) is used in the heat sink to quickly and efficiently dissipate high-temperature heat which generated by LED elements when the street light using LEDs as a light source is turned on. The heat sink using latent heat of an LED street light according to the present invention comprises: a lower plate on which a number of cooling fins protrude at equal intervals and under which an LED module is attached, the LED module having a PCB (printed circuit board) on which a number of LED elements are mounted; an upper plate on which a number of cooling fins protrude at equal intervals, the upper plate to be positioned on the lower plate; and a PCM (phase change material) filled between the upper plate and the lower plated, the PCM absorbing/dissipating thermal energy while changing from liquid to solid or from solid to liquid, wherein the cooling fins protruding on is the upper plate and the lower plate are formed, along a length direction of the heat sink.

1 . A heat sink using latent heat of an LED street light, comprising:
 a lower plate on which a number of cooling fins protrude at equal intervals and under which an LED module is attached, the LED module having a PCB (printed circuit board) on which a number of LED elements are mounted;   an upper plate on which a number of cooling fins protrude at equal intervals, the upper plate to be positioned on the lower plate; and   a PCM (phase change material) filled between the upper plate and the lower plated, the PCM absorbing/dissipating thermal energy while changing from liquid to solid or from solid to liquid,   wherein the cooling fins protruding on the upper plate and the lower plate are formed, along a length direction of the heat sink.   
     
     
         2 . The heat sink according to  claim 1 , wherein the position of each of the protruding cooling fins on the upper plate is arranged between the positions of the two adjacent protruding cooling fins on the lower plated. 
     
     
         3 . The heat sink according to  claim 1 , wherein the cross section of the heat sink is flat. 
     
     
         4 . The heat sink according to  claim 1 , wherein the cross section of the heat sink is in a   shape in which a middle part is higher than both ends in a width direction of the heat sink. 
     
     
         5 . The heat sink according to  claim 1 , wherein the material of the upper plate and the lower plate of the heat sink is aluminum.