Cooling fins, referred to as heat sinks. It is classified as a "passive heat sink" in the field of electronic engineering design. The metal fins (mostly aluminum or copper, silver is too expensive and generally not used) with good thermal conductivity, light weight and easy processing are attached to the heating surface to dissipate heat in a composite heat exchange mode.
Introduction of cooling fins
The heat dissipation fin of stamped aluminum includes a main body and two connecting copper pipes. Two fixing holes are respectively provided at both ends of the main body part, a perforation is opened in the middle part, and the joint part protrudes toward one side of the heat dissipation fin at the perforation. The aluminum heat sink fins are joined to the heat pipe through perforations and copper tubes. The connecting part is formed by extending vertically outward from both ends of the main body part, and includes a vertical part and a bearing part. The vertical part includes a first receiving block and two second receiving blocks. A first receiving portion is formed on both sides of the first receiving block, and a second receiving portion is formed between the second receiving blocks. The supporting portion is formed by vertically extending inwardly from the second receiving portion of the vertical portion, and is parallel to the main body portion, and two fixing protrusions are protrudingly provided on the fixing hole corresponding to the main body portion.
Working principle of cooling fins
As we all know, CPU heat dissipation is mainly achieved through conduction, which involves the medium that directly contacts the processor—the heat sink. After the heat sink absorbs the heat, it dissipates the heat in the form of convection. In the process of convection heat dissipation, the heat dissipation area is mainly determined by the surface area of the heat dissipation fins. The larger the surface area, the better the heat dissipation effect; The smaller the surface area, the worse the heat dissipation effect. The design methods commonly used in the industry mainly include: Increase the number of radiating fins and increase the length of the radiating fins. One of its data is the "thickness-to-height ratio"-the ratio of the thickness to the height of the heat sink fin. The smaller the value, the denser the heat dissipation fins per unit volume can be made, the more the number, the larger the effective heat dissipation surface area, and the better the heat dissipation performance.
Use of heat sink fins
This technology is now used in LED lights, such as corn lights, high bay lights, flood lights, panel lights, etc.
Advantages and disadvantages of cooling fins
Advantages: The production is lighter, the heat dissipation surface area is increased, and the heat effect is good! For example, high-bay high bay lights, traditional die-cast aluminum and profile aluminum, are heavy and have certain safety hazards. Finned heat sinks are safer.
Disadvantages: Due to the different manufacturing processes, the production cost of fin-type heat sinks is higher, so the market price is correspondingly more expensive, so fin-type heat sinks are generally made of higher-end products