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The application of Heatsink
Fin is a given appliance easily heat-generating electronic component cooling apparatus, and more from aluminum, brass or bronze made of plates, sheets, and so much flake, such as computer CPU central processor to be used in fairly large fins, the television power management, line pipe, tube amplifiers have to use the power amplifier heat sink. Usually fins in use to coat electronic components and heat sink contact surface layer of thermal grease, the heat emitted by components more effectively transmitted to the heat sink, go through the fins distributed to the surrounding air. On the heat sink material, the thermal conductivity of each material are different, by thermal conductivity from highest to lowest, are silver, copper, aluminum, steel. But if silver to make the fins would be too expensive, so the best solution is the use of copper. Although aluminum is much cheaper, but apparently not as good thermal conductivity of copper is good (only about 50% copper).
The most commonly used heat sink material is copper and aluminum, both have their advantages and disadvantages. Copper's thermal conductivity, but more expensive, higher processing difficulty, excessive weight (a lot more than the CPU copper radiator restrictions on weight), small heat capacity, and easily oxidized. The aluminum is too soft, can not directly use, are using aluminum to provide sufficient rigidity, the advantage of aluminum is inexpensive, light weight, but the thermal conductivity than copper would be much worse. Some radiator on their respective merits, embedded in a piece of copper on aluminum heatsink base.
For ordinary users, with aluminum fins have been sufficient to achieve cooling needs.
Northern winter heating radiator, also known as heat sink.
Fin plays an important role in the radiator configuration, except for active cooling fan, the assessment of a radiator is good or bad depends largely on the heat sink itself endothermic capacity and thermal conductivity
a. aluminum fins
b. copper heatsink
c. copper and aluminum heat sink combination
d. heat pipe heat sink
Aluminum extrusion heat sink
It is widely used in modern cooling excellent heat dissipation material, most of the industry uses high-quality aluminum 6063 T5, its purity can reach more than 98%, the thermal conduction ability, low density, cheap so get major manufacturers favor. Based on Intel and AMD CPU thermal resistance and its calorific value considerations, aluminum extrusion manufacturers develop the appropriate mold, the ingot is heated to a certain temperature to be changed physical form, and then get out of the mold of the We want all kinds of raw material of the heat sink; then its cut, post-ditch, grinding, deburring, cleaning, surface treatment can be carried out use.
Cast aluminum heat sink
Although inexpensive aluminum extrusion heat sink, lower manufacturing costs, but due to the soft texture of the aluminum itself limited by the height of the fin thickness than his fins generally not more than 1:18, so each PC manufacturers continue to increase the cooling area, and under constant heat dissipation requirements, manufacturers have proposed a more appropriate solution, encryption fins, thereby increasing the number of fins; bent fins, increasing heat dissipation area; the ingots from a solid to a liquid through the mold is heated, and then cooled to become what we want heatsink.
Aluminum cutting fins
While solving this aluminum extrusion can not be achieved from the cooling area, but now the degree of precision molds directly affects our overall shape heatsink and cooling capacity, so more vendors began to think with precision machinery processing tool Direct become ingots block cutting to shape what we want, so in the process neither deformed nor make various impurities in the aluminum extrusion process into the fin, but also make our maximize heat dissipation area.
Cutting copper heatsink
Use for so long aluminum extrusion heat sink, no matter how to change our process, it is difficult to meet growing CPU heat, and some manufacturers have Costly in terms of cost, rounded aluminum and copper demand, due to the thermal conductivity of copper coefficient far greater than aluminum, exponentially increase the thermal conductivity of the heat is of great benefit to us; however, since copper is far greater than the hardness of aluminum, so in the process of the process is a severe test. So conventional extrusion molding process has not applied to copper, while had become such a way of cutting processing.
Aluminum, copper fin stack
One thing is worth noting that the cost and profit is always the ultimate goal pursued by manufacturers, so the major manufacturers began to come up with a more optimal solution, a way to break the pressure copper, aluminum timber, made of We want fins of various shapes, and then with the appropriate links with various fin base plate welded together in the way, so that both met our cooling requirements, but also accelerate the progress of our production, so production more easy
Embedded copper heatsink
This compromise solution to get the most perfect should belong to AVC's first embedded copper technology. This is a copper heat conduction speed, density, heat capacity and strong advantage with the traditional aluminum extrusion density light, cheap, easy to mass production advantages of a harmonious unity;
Inlaid copper heatsink
Another option is to FOXCONN's first contact with the bottom part of the radiator and CPU use copper block, use copper absorbs heat quickly, heat conduction and strong features, a fast CPU will run it generated a lot of heat to the surface of the nickel-plated copper on the block, while the copper block and aluminum extrusion heat sink using thermal paste between the closely combine to make a lot of heat quickly spread to the extruded aluminum heat sink and turned on the fan and away.
In the cooling requirements increase again today, the Japanese began to think of clever use thin dense fin and cooling base plate is fitted with a huge pressure. Such techniques may be copper, aluminum fins and copper, aluminum base plate and match any combination, and also effectively avoid the welding process, a variety of welding thermal paste is not balanced and produced new thermal drawbacks. So customers have more choice and diversity of thermal solutions. However, due to the special nature of its processing, and now there are still too costly production problems.
Copper and aluminum heat sink and heat pipe fitting
Heat pipe is a major discovery in the field of heat transfer in recent years, it is the first major use of high-end notebook computers and communications industries in the main heat dissipating material. Because of its amazing thermal conduction velocity and physical characteristics recycling, so that we become more relaxed and heat to create unlimited possibilities.
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