Factors affecting the effect of aluminum radiator

Factors affecting the effect of aluminum radiator

As a heat dissipation tool with high efficiency, aluminum radiator is widely used in electronics, electrical appliances, lighting and other industries. Different manufacturers master different technologies, referring to different production standards, the production of aluminum radiator in the heat dissipation effect will also have advantages and disadvantages, so what are the factors affecting the heat dissipation effect?

Radiator bottom design

Generally people think that a piece of fin is the key to heat dissipation, in fact, the bottom of the heat sink is also a part of the heat dissipation can not be ignored. Aluminum radiator at the bottom of the design should adhere to the principle of gradually thinning from the heat source part to both sides, which is to ensure that the heat absorbed by the heat source part can be quickly transferred to the surrounding thinner part, to achieve high efficiency heat dissipation. Otherwise, the heat of the heat source can not spread around rapidly, which will affect the radiator to further absorb the heat of the heat source.

Radiator fin design

The radiator is designed in the shape of fins, not only to increase the contact area with the heat source to absorb more heat, but also to increase the contact area between the radiator and the air to disperse heat into the air more quickly. And one of the things you might think about here is that the thicker the fins, the better the heat dissipation? In fact, the overall area of the radiator is limited, the more fins, it is true that there is a larger contact area to absorb more heat, but this also means that the spacing between the fins becomes smaller, at this time the air flow speed in each channel becomes smaller, the radiator to disperse heat into the air becomes more difficult. As the fins get thicker, the corresponding amount of the reservoir decreases, and the heat absorption does not necessarily increase. Therefore, when the manufacturer produces the aluminum radiator, the design of the fins should be calculated reasonably and precisely according to the demand, and produced in strict accordance with the planning. Only in this way can the finished products fully meet the heat dissipation demand.

Extrusion processing

It is not difficult to see that the radiator has very high requirements in shape design and dimensional accuracy, and the radiator in the molding process to achieve no error, in order to achieve the expected heat dissipation effect. Aluminum extrusion molding is a part processing method that exerts strong pressure on aluminum alloy material placed in the mold cavity to produce directional deformation of aluminum alloy, so as to obtain the required section shape, size and mechanical properties. And the radiator using aluminum extrusion molding technology can achieve high precision, good surface quality, the overall structure is stable, to ensure the qualified rate of products. The traditional die casting manufacturing and welding technology is not able to achieve such a good effect, not only the precision is difficult to meet the requirements, but also the welding is easy to corrosion and affect the stability of the overall structure.
Surface treatment processing

The factors that affect the heat dissipation effect of aluminum radiator are not only the radiator area, shape and convective area with the air, but also the thermal radiation capacity can not be ignored. Radiation heat dissipation is a heat dissipation mode in which the surface of the object with higher temperature emits infrared ray and the surface of the object with lower temperature receives heat. The aluminum profile radiator can transfer the high heat from the heat source to the part with lower temperature by using radiation heat dissipation, so as to achieve the effect of balanced heat dissipation and improved heat dissipation performance. The effect of ordinary aluminum radiator on radiation heat dissipation is not good, and the anodic oxidation is used to form an oxide film on the surface of the aluminum radiator, in order to enhance the thermal radiation ability of the radiator, so that the heat dissipation effect of the radiator can be more excellent.