LED lighting is currently the biggest technical problem is the cooling problem, poor heat dissipation led to LED drive power, electrolytic capacitors have become the further development of LED lighting fixtures, LED light source premature aging reasons. In the use of LVLED light source of the lamp program, because the LED light source work in the low voltage (VF = 3.2V), high current (IF = 300-700mA) working condition, the heat is very powerful, the traditional lighting space is small, small area of heat It is difficult to derive heat quickly. Despite the use of a variety of cooling programs, the results are unsatisfactory, a LED lighting a solution to the problem. Looking for easy to use, good thermal conductivity, and low-cost cooling materials are always in the effort.
At present, LED light source after power, about 30% of the electrical energy into light energy, the rest into heat so it should be so much heat as soon as possible export LED lighting structure design is the key technology, heat needs through heat conduction, thermal convection, heat radiation Can be distributed. Indoor LED Lighting Only to export heat as soon as possible in order to effectively reduce the temperature inside the LED lamps in order to protect the power supply is not in the long-term high temperature environment, in order to avoid LED light source due to long-term high temperature work and premature aging.
Because the LED light source itself is not infrared, Indoor LED Lighting ultraviolet, LED light source itself does not have radiation cooling function, LED lighting cooling way only with the LED lamp beads plate close combination of heat sink to derive heat. Radiator must have the function of heat conduction, thermal convection, heat radiation.
Any radiator, in addition to the heat can be quickly transferred from the heat source to the surface of the radiator, the most important thing is to rely on convection and radiation to heat the heat to the air. Thermal conductivity only solves the heat transfer path, and thermal convection is the main function of the radiator, heat dissipation performance mainly by the cooling area, shape, natural convection strength of the decision, Indoor LED Lighting the heat radiation is only auxiliary role. In general, if the heat from the heat source to the radiator surface distance is less than 5mm, then as long as the material thermal conductivity is greater than 5, the heat can be derived, Indoor LED Lighting the rest of the heat must be dominated by thermal convection.
Most LED lighting sources still use low voltage (VF = 3.2V), high current (IF = 200-700mA) LED lamp beads, because the work of high heat, you must use a higher thermal conductivity of aluminum. Usually die-cast aluminum radiator, extruded aluminum radiator, stamping aluminum radiator. Die-cast aluminum radiator is a pressure casting parts of the technology, the liquid zinc copper and aluminum alloy poured into the die-casting machine inlet, the die-casting machine die-casting, casting a pre-designed mold limited shape radiator.
Is a heat-conductive plastic shell aluminum core radiator. Thermal plastic and aluminum cooling core in the injection molding machine on a molding, aluminum heat core to do the pieces, the need for pre-mechanical processing. The heat of the LED lamp beads is quickly conducted through the aluminum heat sink to the thermally conductive plastic, which uses its multi-wing to form air convection heat, Indoor LED Lighting using its surface to radiate some heat.
Plastic aluminum radiator general use of thermal plastic original color white and black, black plastic plastic aluminum radiator radiation cooling effect better. Thermal conductivity of a thermoplastic material, material flow, density, toughness, strength are easy to injection molding, has a good resistance to cold and heat impact cycle characteristics, excellent insulation properties. Thermal conductivity of plastic is better than ordinary metal materials. Thermal conductivity of plastic than aluminum die-casting aluminum and ceramic 40%, the same shape of the radiator, plastic aluminum can reduce the weight of nearly one-third; Indoor LED Lighting compared with the aluminum radiator low processing costs, short processing cycle, low processing temperature; Finished products are not fragile; customer-owned injection molding machine can be differentiated lighting design and production. Plastic aluminum radiator insulation performance is good, easy to pass safety regulations.
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