HEAT SINK FOR IMPROVING HEAT DISSIPATION CHARACTERISTIC OF MIDDLE PORTION OF LED LAMP

摘要

According to the present invention, a heat dissipation unit (140) in a heat sink (150) positions a heat dissipation pipe with a small diameter in a heat dissipation pipe with a large diameter to overlap bottom surfaces (141a, 142a, 143a) of heat dissipation pipes (141, 142, 143) while the bottom surfaces (141a, 142a, 143a) of the heat dissipation pipes (141, 142, 143) come in surface contact with each other. The bottom surface (143a) of the heat dissipation pipe (143) having the largest diameter is installed to come in surface contact with a base plate (130). Air discharge gaps (141c, 142c, 143c) are formed on sides of the heat dissipation pipes (141, 142, 143). According to the present invention, since the thickness and the area of the heat dissipation unit (140) can be larger in a middle portion of an LED plate (120) than a rim of the LED plate (120), heat can be quickly dissipated in the middle portion of the LED plate (120). Also, since hot air in the middle portion can be quickly discharged to the outside through the air discharge gaps (141c, 142c, 143c), a heat dissipation characteristic of the middle portion is improved.;COPYRIGHT KIPO 2017