Heat Sink With Heat Pipe

heat sink With Heat Pipe is a Heat Sink with integrated heat pipe technology, which is used to improve heat dissipation efficiency and is particularly suitable for high-power electronic devices such as computers, LED lights, servers and industrial equipment. This Heat Sink combines heat pipes (Heat Pipe) with traditional heat sinks (Heat Sink), effectively transferring the heat generated by the equipment from the heat source to the surface of the heat sink, and dissipating the heat into the air by convection and radiation.

Manufacturing process

Heat pipe design and manufacturing

Heat pipe structure: Heat pipes are usually made of copper or aluminum materials, and the tube is filled with working liquid. After the liquid evaporates, it transfers heat from one end of the heat source, condenses into liquid, and flows back to the cold end through the capillary structure.

Heat pipe manufacturing process: The manufacturing process of heat pipes usually includes copper pipe processing, inner wall coating of working fluid, pressurized sealing and vacuum injection, etc., to ensure that the working fluid in the heat pipe can effectively evaporate and condense at high temperatures.

Milling and surface treatment of radiator

The radiator part is usually made of aluminum alloy material, and multiple heat dissipation fins are processed through CNC milling and stamping processes to maximize the heat dissipation area.

Then the surface is treated, such as anodizing, spraying or coating, to improve its corrosion resistance and thermal conductivity.

Connection of heat pipe to heat sink

Welding or hot pressing: The heat pipe is connected to the heat sink by welding or hot pressing to ensure that the heat pipe can effectively transfer heat from the heat source to the heat sink.

Testing and quality control

The completed heat pipe radiator will undergo strict quality testing, including testing of parameters such as thermal conductivity, heat dissipation performance and pressure resistance to ensure its stability under high temperature and high pressure environment.

Precision

The diameter and length of the heat pipe: The diameter of the heat pipe is usually between 6mm and 12mm, and the length can be customized according to specific needs. The accuracy is required to be within ±0.1mm to ensure the effective circulation of the working fluid inside the heat pipe.

Fin spacing: The spacing of the heat sink determines the heat dissipation effect, usually 1mm to 5mm, and the accuracy is also required to be within ±0.1mm.

Thermal resistance: The thermal resistance of the heat pipe radiator is usually between 0.2°C/W and 2°C/W, and the specific value depends on the design of the radiator and the materials used. The lower the thermal resistance, the higher the heat dissipation efficiency.

Thermal conductivity: The thermal conductivity of the heat sink and heat pipe determines the heat transfer efficiency. The thermal conductivity of aluminum alloy materials is usually about 200-220 W/m·K, and the thermal conductivity of copper is higher, up to 380 W/m·K.

Surface treatment

Anodizing: This is a common surface treatment method for aluminum materials, which can improve the corrosion resistance, hardness and thermal conductivity of aluminum alloys. A dense oxide film will form on the surface of anodized aluminum, which effectively improves the heat dissipation effect.

Spraying: Through the spraying process, a coating with good thermal conductivity is applied to the surface of the heat sink. This process not only improves the heat dissipation effect, but also enhances the corrosion resistance.

Coating: Special coating materials, such as graphene, carbon nanotubes and other materials, are used to further improve thermal conductivity.

Metal plating: For example, nickel plating, silver plating, etc. These processes can increase the oxidation resistance of the radiator, reduce corrosion, and improve stability after long-term use.

Application areas

Electronic products: including computer processors (CPU), graphics cards, game consoles, routers and other equipment, especially suitable for high-performance, high-power electronic components heat dissipation.

LED lighting: The heat dissipation requirements of LED lamps are getting higher and higher. Heat pipe radiators can effectively reduce the operating temperature of LED lamps and extend their service life.

Servers and data centers: High-density integrated electronic devices, such as servers, have extremely important heat dissipation requirements. Heat pipe radiators can effectively prevent overheating and cause equipment failure.

Automotive electronics: In electric vehicles, hybrid vehicles and traditional vehicles, heat pipe radiators can be used for battery management systems, engine control systems and other electronic devices.

Industrial equipment: In automation equipment, medical equipment and communication equipment, heat pipe radiators are often used to ensure stable operation of equipment under high load.

How to maintain and maintain

Regular cleaning: Heat pipe radiators are prone to dust accumulation, especially the gap between the cooling fins. Regularly clean the dust and debris on the surface of the radiator to maintain the heat dissipation effect. Use a soft brush or compressed air for cleaning, and avoid using water or highly corrosive detergents.

Check the heat pipe connection: The connection between the heat pipe and the heat sink is the key to heat conduction. It is necessary to regularly check the firmness of the welding or hot pressing connection to avoid poor contact and reduce the heat dissipation effect.

Avoid excessive impact: Although the heat pipe radiator is strong, it is still necessary to avoid high-intensity impact or pressure to prevent the heat pipe from breaking or leaking.

Ambient temperature control: Make sure that the ambient temperature of the equipment is within the recommended range to avoid overheating of the equipment, especially when used in a high temperature environment, to ensure that the heat pipe radiator is not overloaded.

Avoid liquid leakage: The heat pipe is filled with working fluid. Once the heat pipe breaks or leaks, the heat dissipation performance will be greatly reduced. During maintenance, care should be taken to avoid sharp objects from contacting the heat pipe.

Precautions

Installation direction: The installation position and direction of the heat pipe radiator are very critical. When installing, ensure that the evaporation end of the heat pipe faces the heat source and the condensation end faces the heat dissipation fins. The wrong installation direction will affect the working efficiency of the heat pipe.

Appropriate load and operating temperature: The heat pipe radiator has a certain heat load bearing capacity. When using it, it is necessary to follow the operating temperature range provided by the manufacturer to avoid exceeding the design parameters.

Material selection: For different application areas, appropriate heat pipe materials and heat sink materials should be selected according to specific needs. For example, in corrosive environments, materials with stronger corrosion resistance should be selected, such as nickel-plated aluminum alloy or copper materials.

Avoid high-temperature operation: Long-term operation in extremely high temperature environments may reduce the evaporation efficiency of the working fluid inside the heat pipe, affecting the heat dissipation effect. Therefore, the equipment should be kept at high temperatures for a long time.

Quality certification: When purchasing heat pipe radiators, products with quality certification should be selected to ensure the long-term stability and safety of the radiator.

Heat pipe radiators are a highly integrated heat dissipation solution that can effectively improve the efficiency of heat transfer and dissipation. Its precision, surface treatment, material selection and reasonable maintenance are the key to ensuring its performance. With the continuous improvement of heat dissipation requirements for electronic equipment and industrial applications, heat pipe radiators will be more widely used in the future.