How Do I Choose the Best Heatsink Design?

The notebook radiator is a fan device that blows the heat directly to the bottom of the notebook computer, forcibly blows out the notebook heat, and introduces cold air to increase the air flow at the bottom of the notebook.

Notebook Cooler

The notebook radiator is a fan device that blows the heat directly to the bottom of the notebook computer, forcibly blows out the notebook heat, and introduces cold air to increase the air flow at the bottom of the notebook.

Chinese name

Notebook Cooler

Types of

Electronic equipment

Features

Cooling

Object of action

laptop

New product

Heat extraction radiator

It is a small device that effectively maintains the internal low-temperature working environment and effectively reduces the temperature of the notebook computer. However, notebook radiators usually only help notebooks dissipate heat, and most of the radiators mainly reduce the external temperature of the notebook by strengthening the air flow speed of the plastic casing at the bottom.

1. Each corner of the radiator panel has a fine chamfering treatment, which will not scratch the books;

2. Reasonable slope setting, more comfortable when using books;

3. Long-term use of the notebook, cooling becomes a matter of course, due to the constant increase in frequency of mainstream notebooks, the long-term use temperature is getting higher and higher. In order to better protect one's love "Ben" really needs to cool down. The cooling pad can help our books to avoid the pain of high temperature and ensure the normal operation of the books;

4. Blow the heat directly to the bottom of the notebook computer, force the notebook heat out, and introduce cold air to increase the air flow at the bottom of the notebook, so that all heating components inside the notebook computer can be radiated and the internal low-temperature working environment can be effectively maintained;

5. The USB power design is directly connected to the notebook USB interface, without the need to add a socket and other equipment;

6. The wind speed of the radiator of a single fan is not very large, but it does not mean that the cooling effect is not good, because it is a single oversized fan, and the speed of the fan is a constant value set by the manufacturer after testing. This speed can achieve the fan life and cooling effect. The best balance of this radiator is good or bad, it should be the result of a customer's long-term use.

1. 1. Radiator material determines success or failure

In the past two years, there have been more and more types of notebook heat sinks, but what has followed is a messy situation. Therefore, when purchasing, the most important thing is the material of the notebook radiator. At present, miscellaneous products are usually made of plastic materials, which not only has poor thermal conductivity, but also has an unreasonable shape design. Relatively speaking, brand-name products will use aluminum alloy with higher thermal conductivity, and its heat dissipation effect is satisfactory. In addition, when purchasing, you should also pay attention to whether the edges of the radiator are smooth and whether the surface of the radiator is non-slip design. Otherwise, if you scratch your hands, or if your notebook "speed-skates" from the radiator, you will lose more.

1. 2. The radiator fan is really annoying

Laptop radiators usually use dual-fan or triple-fan designs, and the heat dissipation effect is mainly determined by the airflow generated by the fans, not the number of fans. Therefore, when buying a notebook radiator, don't blindly superstitious three-fan design, sometimes double-fan design is more excellent. The ideal solution is to take a personal experience with your own notebook so that you can buy the most suitable product. It should also be noted that some dual-fan designs have stronger heat dissipation effects because the fan speed is increased. What followed was noticeable noise. Therefore, when purchasing this book, users must pay special attention to the noise of the radiator. Only when there is no obvious noise in a quiet environment, is it suitable for users to buy!

1. 3. The external power supply of the radiator is more flexible

Most notebook coolers will be powered by USB, which is very convenient. However, if the USB power supply is used when the battery is used, it may cause insufficient power supply of the notebook, shorten the battery life of the notebook, or occupy a valuable USB interface, and cannot connect other devices. So in theory, it is better to buy a notebook radiator that also has an external power supply. In this way, when there is an external power supply or it is not necessary to connect multiple USB devices, the USB power supply is used, and when the notebook is under heavy work or needs to connect multiple USB devices, the external power supply is used for power supply. Not only is the use more flexible, it will not affect the use of other USB devices.

1. 4. Adjustable speed radiator is more value

Fan noise is unavoidable, but it can be reduced by reducing the speed. On days where the weather is not too hot, notebook radiators with speed regulation are more worthy of favor. At present, the fans of notebook radiators usually have three levels of speed regulation: high, medium and low. Just like an electric fan, it adjusts with different temperatures. Where you buy a laptop radiator, you should try to buy products with speed regulation. In addition, notebook coolers with software control and automatic monitoring can also be considered.

1. 5. Choose exhaust vent radiator carefully

In addition to pedestal radiators, PC card radiators have also appeared on the market. This heat sink can be directly inserted into the PC card slot of a notebook, and the fan is rotated to extract air to achieve the purpose of rapid cooling of the notebook. However, due to different internal designs, this heat sink is not suitable for all notebooks. If you use it forcibly, it will disturb the air convection inside and cause the high fever inside the notebook, so this radiator is only a brand-name product. In addition, there is an exhaust radiator with a similar shape. This radiator also exhausts air, but it is installed in the exhaust port of the notebook. Therefore, the exhaust direction can be consistent with the direction of air flow inside the notebook So it can be considered.

1. 6. "Increase" books can also improve heat dissipation

The reason why notebooks need a heat sink is mainly due to poor air circulation at the bottom. Therefore, there is also a laptop pad on the market, which can also be regarded as a special radiator. After using the foot pad, the notebook is "increased" and the distance from the desktop is much longer. The bottom air is easier to circulate, and the heat dissipation problem has been solved.

Using a laptop for business office and games for a long time will cause damage to the lumbar spine and spine. The ergonomic design of the notebook radiator can better adapt to and meet people's choices from various angles, making people more comfortable at work. , Safety and health. So as to improve work efficiency.

1.Material of cooling base

There are two main materials used in the current market: metal or plastic. The thermal conductivity of metal is good, but the bottom of any notebook has non-slip rubber pads, and it is impossible to fit tightly with the metal cooling base, so the thermal conductivity of metal cannot be fully exerted. Of course, the metal base can still better absorb and diffuse the heat emitted from the notebook. In addition, metals are generally heavy, and because of the high process requirements during manufacturing, once the work is not fine enough, it can easily become a sharp weapon. Plastic materials are generally lighter and have higher hardness. Many engineering plastics are even stronger than metals. For cost and portability considerations, a light-weight, low-heat notebook can be purchased with a well-designed plastic cooling base. However, if it is heavy and has a high heat, it is still recommended to purchase a metal base with a good workmanship.

Commonly used underside treatment processes include:

Drawing process (grinding)

The drawing process is also the most commonly used underside treatment process. When drawing, use a tool with a certain degree of roughness and hardness on the surface, such as sandpaper and files, to perform unidirectional, repeated or rotating friction on the surface of the object, and use the cutting effect of the tool to remove the surface when it is rubbed Of course, smoothing out the protrusions will also cause scratches on the originally flat surface. Therefore, a gradual process from coarse to fine should be used to gradually reduce the roughness of the treated surface.

Features of the drawing process: Strips of parallel wear marks

Disc milling process (cutting)

The disc milling process refers to cutting the surface of the radiator by a high-speed rotating tool after fixing the bottom surface of the radiator. The tool always rotates in the same plane, so the cut bottom surface is very flat. As with the wire drawing process, the finer the tools used in the disk milling process, the higher the flatness of the cut bottom surface. The manufacturing cost of the disk milling process is relatively high, but only two or three processes are required for wire drawing, which is more time-saving and the effect is ideal.

Disk milling process features: curved wear marks

CNC machine tools

Milling is still the main process used by CNC machine tools to smooth the bottom surface of heat sinks. However, unlike traditional disk milling, the cutter of a CNC milling machine can precisely control the relative distance to the heat sink through a single-chip microcomputer. After the tool contacts the bottom surface of the heat sink, the two are moved horizontally relative to each other to cut the unprocessed part left by the tool gap in the traditional disc milling to achieve a complete flat effect. No subsequent processing can be used to obtain the mirror-like effect The flatness can be less than 0.001mm.

Other crafts

In addition to the above, there are other processes for the bottom treatment of the radiator, such as polishing. However, relatively speaking, the polishing treatment is more for the consideration of the aesthetics of the radiator, and the flatness of the bottom surface of the radiator is not too much. Improvements and higher processing costs.

As we said before, no matter how the bottom surface of the heat sink is handled, this mechanical process cannot make a completely standard flat surface, and the trenches or gaps between the CPU and the heat sink are always inevitable. The air existing in these gaps has a great influence on the heat transfer capacity of the radiator. As everyone knows, the thermal resistance of air is very high, so other substances must be used to reduce the heat resistance, otherwise the heat transfer performance of the heat sink will be large. The discount is not even working. This is the origin of the thermally conductive medium. Its role is to fill the gap between the heat source such as the CPU and the heat sink, and increase the contact area between the heat source and the heat sink.