LED lighting fixtures2018-11-07
At present, one of the biggest technical problems of LED lighting fixtures is the heat dissipation problem. The LED heat supply and electrolytic capacitors have become the shortcomings for the further development of LED lighting fixtures, and the reason for the premature aging of LED light sources.
Only by quickly exporting heat can it be useful to reduce the temperature of the cavity inside the LED lamp, in order to maintain the power supply is not working in a durable high temperature environment, in order to prevent the LED light source from premature aging due to long time high temperature operation.
Because the LED light source itself does not have infrared rays or ultraviolet rays, the LED light source itself has no radiation heat dissipation function, and the heat dissipation route of the LED lighting fixture can only derive heat through a heat sink closely combined with the LED lamp bead. It is necessary for the heat sink to have heat conduction, heat convection, and heat radiation.
Any radiator, in addition to being able to quickly transfer heat from the heat source to the surface of the radiator, the most important thing is to rely on convection and radiation to dissipate heat into the air. Heat conduction only deals with the way of heat transfer, and heat convection is the main function of the heat sink. The heat dissipation function is mainly affected by the heat dissipation area, shape, and the ability of natural convection intensity. Thermal radiation is only an auxiliary function. Generally speaking, if the heat is separated from the heat source to the surface of the heat sink by less than 5 mm, then only when the thermal conductivity of the material is greater than 5, the heat can be derived, and other heat dissipation must be dominated by heat convection.