Do you really understand heat dissipation? Analyze the principle of heat pipe radiator
Release time:
2024-06-05 17:42
The heat sink is essential in the platform. It can help the CPU achieve a cool cooling effect and make the CPU run more stable. Often players will use the radiator with a heat pipe to install, different needs of the player to choose the radiator is different, then the number of heat pipe radiator will be different. There are radiators with single heat pipes, double heat pipes and 8 heat pipes. The heat dissipation effect of these radiators is not the same, players need to choose their own products through their own needs. Many players will say that the heat pipe of the radiator is used to conduct heat, and the heat of the CPU is blown through the fins. In order to have a better heat dissipation effect, the number of heat pipes in the radiator needs to reach a certain number, otherwise it is difficult to meet the needs of players. So how does the heat pipe radiator dissipate heat? Witley will take you to see.
Heat dissipation principle of heat pipe
In fact, the principle is very simple. The heat absorption and heat release of an object are relative. When there is a temperature difference, the phenomenon of heat transfer from high temperature to low temperature will inevitably occur. Heat pipe is the use of evaporative refrigeration, so that the temperature difference between the two ends of the heat pipe is very large, so that the heat conduction. The principle of heat pipe technology is actually very simple, which is to use the evaporation and condensation of the working fluid to transfer heat. The inside of the copper tube is vacuumed and filled with working fluid. The fluid circulates repeatedly in the interior through a phase change process of evaporation-condensation, continuously transferring heat from the hot end to the cold end, thus forming a heat transfer process in which heat is transferred from one end of the tube to the other end.
The general heat pipe is composed of a tube shell, a wick and an end cover. The inside of the heat pipe is pumped into a negative pressure state and filled with an appropriate liquid, which has a low boiling point and is easy to volatilize. The tube wall has a wick, which is composed of a capillary porous material. One end of the heat pipe is the evaporation end, and the other end is the condensation end. When one end of the heat pipe is heated, the liquid in the capillary tube evaporates rapidly. The vapor flows to the other end under a slight pressure difference, releases heat, and condenses into liquid again. The liquid flows back to the evaporation section by capillary force along the porous material, and the heat is transferred from one end of the heat pipe to the other end. This cycle is fast, and heat can be continuously conducted away.
Heat pipe design is different
At present, there are some cheap heat pipe radiators in the market, which also include some video card radiators. Although heat pipes are used, the outer wall is often made of aluminum, and the internal capillary process is almost impossible to use powder sintering process, so the performance will not be as good as * * heat pipes. When purchasing, we cannot give too much hope to the heat dissipation performance of this product. Understanding the classification of heat pipes helps us to select * * radiators. Although most of the heat pipes in PC radiators use copper as the main material, the heat dissipation performance is quite different due to different structures. At present, in the four categories (wire mesh, groove, powder sintering), most of the two structures are groove and sintering.
Welding process of fin folding blade is different
The dense thin fins we see are made by this process. When forming, the edge of the fin retains a small section of specially designed protruding part, the fin is fixed in a custom-made mold, the protruding part is bent and locked with each other, and becomes a neat arrangement of parallel fins. In combination with stamping, it is mainly used to manufacture parallel dense thin fins used in reflow or ducted designs. The advantages of the folding method are obvious: the mechanical locking structure is simple and the process is few; the interface impedance generated by the subsequent connection between the fin and the heat absorption bottom can be compensated. One-time equipment input can be a large number of output, and now many heat pipe cooling products on the market have this type of fin link, stable and simple. And welding this form of heat dissipation is a well-known metal processing method. The commonly used welding method in heat sink processing is reflow soldering, also known as reflow soldering. At present, most of the heat pipe radiator, the connection between the heat pipe and the fin is welding. Because the bonding degree of welding directly affects the heat dissipation effect, the cost of welding is higher.
Suitable for their own is good
Choosing a good radiator depends on the CPU reference of the players. The author can be divided into three groups, one is ordinary players, the other is * * players. The platform of ordinary players will not be overclocked and will be used for a long time. It does not require too much heat dissipation. For players, long-term use requires a radiator with better heat dissipation capacity. For * * players, a radiator that can withstand overclocking is very important.
keyword： Radiator
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