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LED lighting lamps and lanterns of five types of radiator

The LED lighting lamps and lanterns is one of the biggest technical problem is the heat dissipation problem, poor heat dissipation lead to LED drive power supply, electrolytic capacitor is short to the further development of LED lighting lamps and lanterns, the LED light source, the causes of premature aging. 
In using LVLED lighting lamps and lanterns scheme, due to the LED light source in work (VF) = 3.2 V low voltage, high current (IF = 300-700 ma) working condition, fever, traditional lamps and lanterns of the space is narrow, small area of the radiator is hard to export quantity of heat quickly. Although USES a variety of cooling schemes, the results are unsatisfactory, the LED lighting lamps and lanterns of no solution of the problem. Looking for simple and easy to use, good thermal conductivity and low cost of heat dissipation material is always in the effort. 
About 30% at present, such as LED light source in the electric energy into light energy, and the rest is converted into heat energy so be exported as soon as possible so much heat is the key technology of structure design of LED lamps and lanterns, heat energy through heat conduction, convection and radiation is needed to send out. Only by reducing export quantity of heat to be effective as soon as possible the cavity temperature inside the LED lamps and lanterns, can protect the power supply does not work in the persistent high temperatures, can avoid the LED light source for high temperature for a long time work and produce premature aging. 
The cooling way of LED lighting lamps and lanterns 
Because of the LED light source itself no infrared, ultraviolet, so the LED light source itself without radiation cooling function, the LED lighting lamps and lanterns of the cooling way only through close combination with LED lamp bead board heat radiator to export. The radiator must possess the function of the heat conduction, convection and radiation. 
Any radiator, in addition to can quickly to the heat from the heat source conduction to the surface of the radiator, the main or rely on the heat convection and radiation in the air. Way only solves the heat transfer of thermal conductivity, and heat convection is the main function of the radiator, the heat dissipating performance mainly by natural convection heat dissipation area, shape, strength the ability of the decision, the effect of thermal radiation is auxiliary. In general, if the heat from the heat source to the radiator surface distance is less than 5 mm, so as long as the material coefficient of thermal conductivity is greater than 5, the heat can be derived, and the remaining heat must be dominated by heat convection. 
Most of the LED lighting light source still use (VF) = 3.2 V low voltage, high current (IF = 200-200 ma) LED lamp bead, due to the high quantity of heat at work, you must use high thermal conductivity aluminum alloy. Usually has a stamping die casting aluminum radiator, extruded aluminum radiator, aluminum radiator. Die-casting aluminum radiator technology is a kind of pressure casting parts, poured liquid zinc copper aluminum injection into the mouth of die casting machine, the die casting machine die casting, casting out the shape of the mould qualified radiator designed. 
Die casting aluminum radiator 
Production cost control, heat dissipation thin wing can do, it is difficult to maximize the heat dissipation area. The LED die casting material for ADC10 and ADC12 commonly used lamps and lanterns of the radiator. 
Extruded aluminum radiator 
Is the liquid aluminum through fixed die extrusion, then put the rod by machining cutting into the shape of a need to radiator, post processing cost is higher. Extruded aluminum radiator is shown in figure 3. Heat dissipation wing can do a lot of very thin, the heat dissipation area get the maximum extension, heat dissipation wing work automatically when the air convection diffusion heat, cooling effect is better. Commonly used material is AL6061 and AL6063. 
Stamping aluminum radiator 
Is through the punch and die for steel, aluminum alloy sheet metal stamping, pull to rise, make a cup of tube type of radiator, stamping molding radiator inside and outside perimeter smooth, because there was no wings and the cooling area is limited. Commonly used aluminum alloy material is 5052, 6061, 6063. Stamping parts quality is small, high material utilization, is a low cost solution. 
Aluminum alloy radiator thermal conductivity is ideal, more suitable for isolation switch constant-current power supply. For the isolation switch constant-current power supply, the need to pass through the structure design of lamps and lanterns for ac and dc, high voltage and low voltage power supply isolation, can through the CE and UL certification. 
Aluminum radiator plastic bag 
Is a kind of plastic shell of thermal conductivity aluminum radiator core. Thermal conductivity of plastic and aluminum radiator core is molding in the injection molding machine last, aluminum radiator core is up to do, need to advance to mechanical processing. LED lamp bead rapid conduction of heat through the aluminum radiator core to thermal conductive plastics and thermal conductive plastic using its wing form air convection, more use of the surface part of heat radiation. 
Plastic package aluminum radiator general use of thermal conductive plastics were the color of white and black, black plastic plastic package aluminum radiator of radiation cooling effect is better. Liquidity of a thermoplastic material for thermal conducting plastics and the material, strength, toughness and density are easy to injection molding, has the very good impact resistance to hot and cold cycle properties, excellent insulation performance. Radiation coefficient of thermal conductivity of plastic is better than that of ordinary metal material. Thermal conductive plastic density is 40% smaller than aluminum and ceramic, the same shape of the radiator, aluminum plastic package can reduce the weight of the nearly a third; Compared with the whole aluminum radiator low processing cost, short processing cycle, low processing temperature; The finished product is not easy to broken; The injection molding machine can be carried out by advertisers differentiation of lamps and lanterns shape design production. Plastic package aluminum radiator insulation performance is good, easy to pass safety. 
High thermal conductive plastic radiator 
High thermal conductive plastic radiator recently development soon, a kind of whole plastic radiator radiator for thermal conducting plastics and its coefficient of thermal conductivity is higher than common plastic dozens of times, up to 2-9 w/mk, excellent heat conduction and thermal radiation ability; Can be applied to all sorts of lamps and lanterns of power of new heat insulation materials, can be widely used in all kinds of LED lamps and lanterns of 1 w to 200 w. 
High thermal conductive plastic stress levels is ac 6000 v, suitable for using an isolating switch constant-current power supply, HVLED high voltage linear constant current power supply. Make this kind of LED lighting lamps and lanterns easily through CE, TUV, UL and other strict safety detection. HVLED using high voltage (VF = 35-280 VDC), small current (IF = 20-60 ma) working status, HVLED lamp bead plate fever so. High thermal conductive plastic radiator with traditional injection molding, extrusion molding machine. A molding, high finished product finish. Improved production efficiency, high design flexibility, can give full play to the designer's design concept. High thermal conductive plastic radiator with PLA (corn starch) polymerization and degradation, no residue, no chemical pollution, the production process without any heavy metal pollution, no water, no exhaust gas, conform to the requirements of the global environmental protection. 
High thermal conductive plastic cooling body internal PLA via intermolecular nanoscale metal ions, at high temperatures can be rapid movement, increase the thermal radiation energy. Its vitality is better than that of metal material heat dissipation. High thermal conductive plastic radiator resistance to high temperature, 150 for five hours no rupture, deformation, with high voltage linear constant current IC driver program application, without electrolytic capacitor and inductance, large volume significantly improves the life span of LED the whole light, not isolation power supply scheme, high efficiency and low cost. Especially suitable for daylight lamp, high power applications of industrial and mining lamp. 
High thermal conductive plastic radiator can design a lot of precision of the heat dissipation wing, the heat dissipation wing can do a lot of very thin, get the maximum extension cooling area, heat dissipation wing work automatically when the air convection diffusion heat, cooling effect is better. LED lamp bead heat to the heat dissipation wing directly by high thermal conductive plastic, by air convection and surface radiation heat quickly. 
High thermal conductive plastic radiator density to lighter than aluminium. The density of aluminum is 2700 kg/m3, and the density of plastic is 1420 kg/m3, almost half of aluminum, so the same shape of the radiator, radiator plastic weight is only half of the aluminum. And processing is simple, the molding cycle can be shortened by 20-50%, this also reduces the cost of power. 

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