Contrast of Five Radiators for Indoor LED Lighting

Date:24-08-2019

Die Casting Aluminum Radiator The production cost is co […]

Die Casting Aluminum Radiator
The production cost is controllable, and the heat dissipation wing can not be thin, so it is difficult to make the heat dissipation area larger. The common die-casting materials for radiators of LED lamps are ADC10 and ADC12.
Extruded aluminium radiator
The liquid aluminium is extruded through a fixed die, and then the bar is machined and cut into the required shape of the radiator. The later processing cost is higher. The radiating wing can do a lot of very thin, the maximum expansion of the radiating area. When the radiating wing works, it automatically forms air convection to diffuse heat, and the radiating effect is better. Common materials are AL6061 and AL6063.
Stamping aluminium radiator
The sheet metal of steel and aluminium alloy is stamped and lifted by punch and die to form a cup-and-tube radiator. The exterior and interior of the radiator are smooth, and the heat dissipation area is limited because of the absence of wings. The commonly used aluminium alloy materials are 5052, 6061 and 6063. Stamping parts are of low quality and high material utilization rate, which is a low-cost solution.
The heat conduction of aluminium alloy radiator is ideal and suitable for isolated switching constant current power supply. For the non-disconnecting switch constant current power supply, it is necessary to isolate AC and DC, high voltage and low voltage power supply through the lamp structure design, in order to pass CE or UL certification.
Plastic-clad aluminium radiator
The utility model is a radiator with a heat conducting plastic shell and an aluminium core. Thermal conductive plastics and aluminium heat sink are formed in an injection molding machine once, and aluminium heat sink is used as buried parts, which need to be machined beforehand. The heat of LED lamp beads is rapidly transmitted to heat conducting plastics through aluminium heat sink. Thermal conducting plastics use its multi-wings to form air convection and heat dissipation, and use its surface to radiate part of the heat.
Plastic-clad aluminium radiators generally use the original color of thermal conductive plastics white and black, and the radiation heat dissipation effect of plastic-clad aluminium radiators with black plastics is better. Thermal conductive plastics is a kind of thermoplastic material, which is easy to be injection moulded because of its fluidity, density, toughness and strength. It has good cold and thermal shock cycle resistance and excellent insulation performance. The radiation coefficient of thermal conductive plastics is better than that of ordinary metal materials.
The density of thermal conductive plastics is 40% smaller than that of die-cast aluminium and ceramics, and the weight of plastic-clad aluminium in the same shape radiator can be reduced by nearly one-third; compared with all aluminium radiators, the processing cost is low, the processing cycle is short and the processing temperature is low; the finished products are not fragile; the customer-owned injection moulding machine can design and produce different shapes of lamps and lanterns. Plastic-clad aluminium radiator has good insulation performance and is easy to pass through safety regulations.
High Thermal Conductivity Plastic Radiator
High thermal conductivity plastic radiator has developed rapidly recently. High thermal conductivity plastic radiator is a kind of all-plastic radiator. Its thermal conductivity coefficient is several times higher than that of ordinary plastic, reaching 2-9w/mk. It has excellent heat conduction and radiation ability. It can be used as a new type of insulating heat dissipation material for various power lamps and lanterns, and can be widely used in 1W-200W. All kinds of LED lamps and lanterns.
High thermal conductivity plastics can withstand voltage up to 6000V, suitable for use of non-isolating switch constant current power supply, HVLED high-voltage linear constant current power supply. This kind of LED lighting is easy to pass CE, TUV, UL and other strict safety testing. HVLED uses high voltage (VF=35-280VDC) and low current (IF=20-60mA) working conditions, so the heating of HVLED bulb board is reduced. High thermal conductivity plastic radiator can be made by traditional injection and extruder.
Once shaping, the finished product has high smoothness. Greatly improve the efficiency, high flexibility in shape design, can give full play to the design concept of designers. High thermal conductivity plastic radiator is polymerized by PLA (corn starch). It is fully degraded, no residue, no chemical pollution, no heavy metal pollution, no sewage, no waste gas in the production process, and meets the requirements of global environmental protection.
The PLA molecules of high thermal conductivity plastics are densely packed with nano-sized metal ions, which can move rapidly at high temperature and increase the thermal radiation energy. Its activity is superior to that of metal heat sinks. High thermal conductivity plastic radiator can withstand high temperature, not break at 150 C for 5 hours, no distortion. It is applied with high voltage linear constant current IC drive scheme. It does not need electrolytic capacitor and large inductance, and greatly enhances the life of LED lamp. The non-isolated power supply scheme has high efficiency and low cost. It is especially suitable for the application of fluorescent lamps and high-power industrial and mining lamps.
High thermal conductivity plastic radiator can design many precise radiator fins. The radiator fins can be made many thin, the radiation area can be expanded to the largest extent. When the radiator fins work, air convection and diffusion heat can be formed automatically, and the radiation effect is better. The heat of LED lamp beads passes through high thermal conductivity plastics directly to the radiation wing, and quickly dissipates heat through air convection and surface radiation.
The density of high thermal conductivity plastic radiator is lighter than that of aluminium. The density of aluminium is 2700kg/m3, while that of plastic is 1420kg/m3, which is almost half of that of aluminium. Therefore, the weight of plastic radiator of the same shape is only 1/2 of that of aluminium. Moreover, the processing is simple, and the forming cycle can be shortened by 20-50%, which also reduces the power of cost.

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