Third, light source of Cree LED light bulbs
Now let’s look at the light source: use 20pcs 3535 encapsulation of LED, as for the type of ominous, how much and how much string didn’t look out, but this is not the dismantling of a key, the key is to see it the installation of the manufacturing process. It USES a hard piece of bent circular aluminum board and aluminum radiator with two input jack fixed solution and the positive and negative poles with two metal shrapnel oppression, so then, beautiful and worth learning (this) as for the “hard” bending of the circular aluminum plate is how to do? Is estimated to be the first LED all welding on a flat piece of aluminum plate, and then through the bending of the clip to do this shape, it is not bent out by hand. But it also has a drawback, is off the opportunity of copper is very high and can’t only bending once many times bending
Four, aluminum alloy heat sink, break up
Look at the pictures can know, aluminum radiator is a middle with 10 of faceted cylindrical, exposed the round shape of part is a heat sink, hollow cylinder middle part 2 there is a light source and power supply electrical connection in the role,. Whole, make the radiator use three card buckle way with plastic holder with fixed position and the three card buckle design is clever because when fixed glass to glue, by the way, the glue on the three card buckle also play together. Here it is necessary to combine the above light source structure about the thermal conductivity and thermal conditions of the product we know fixed in front of the light source used only two sockets to use screw fastening, so it is difficult to form a closely between light source and heat sink in the middle there will be some big gaps, and look at the pictures can know the gap not we usually use some filler to help heat (such as thermal conductive silicone, conducting strip without and with a hollow cylindrical structure for heat conduction on heat transfer so there will be a big problem, right? So small radiator can really spread the 9.5 W hot? The whole radiator weight is about 100 g, look at the pictures can also know it to appear loose edge area is not enough amount of scattered scattered go so large wattage. Even with heat paint does not help. According to these two questions, this is going to a temperature rise test to see whether it’s a pity that is preparing to test of time carelessly use 220 v, the bulb is broken. But think later, if CREE LED chip can be over 150 degrees of heat-resistant that there is no problem.