Heat sink

The term heat sink is a combination of the words “Heat” meaning heat and “Sink” meaning reducer. It has high thermal conductivity and is usually installed on electronic and mechanical components. The function of the heat sink is to transfer heat from components to control temperature.

Performance:

A heat sink, if properly connected to a heat source, is able to absorb the heat generated and gradually dissipate this heat through interaction with air flow or liquids such as water. As the size of the heat sink increases, the amount of heat dissipation also increases, which helps improve the performance and reduce the temperature of electronic components. Increased heat can damage electronic components and reduce their lifespan. There are many components in electronic and telecommunications devices that generate heat due to their function.

Structure:

To understand the function of a heat sink in an LED lamp, it is necessary to understand its structure. The basis of the heat sink’s operation is based on the specific resistance of the material. LED heat sinks are usually made of materials with high thermal conductivity.

Materials used in the manufacture of heat sinks:

Among metals, gold is the best thermal conductor, but is rarely used due to its high cost. Copper is also a suitable metal, but its use in heat sinks is limited due to its high density and limited ductility. Aluminum is widely used in the manufacture of heat sinks due to its light weight, low cost, and high ductility. Aluminum can be anodized, which creates a thicker oxide layer and better colorability.

Heat sink applications:

In LED lamps, heat sinks are used to absorb and transfer the heat emitted by the LED light and prevent damage to the LED’s internal phosphor. Damage to the phosphor can cause reduced light output, color change, and shorten the lifespan of the LED. Therefore, choosing the right heat sinks in lighting products is very important.

The role of the heat sink in lamp efficiency:

Heat build-up is one of the main causes of structural failure of lights, especially LEDs. In designing the thermal systems of lights, attention should be paid to the driver current, environmental conditions and thermal resistances of the components. To transfer maximum heat to the heat sink, it is common to use thermal interface materials such as grease or epoxy.

Advantages of LED heatsink:

•  Prevent temperature rise
• Protecting temperature-sensitive equipment
• Preventing changes in light intensity and color
• Increase the lifespan of parts

Types of heat sinks:

Heat sinks fall into two general categories: those with a blower fan or liquid cooling system, and those without mechanical components that use convection to transfer heat. The former are highly efficient but have moving parts and are expensive, while the latter have no moving parts and require a constant flow of air.

Types of fanless heatsinks:

Fanless heatsinks are made in a variety of shapes, including round, comb, U-shaped, slotted, butterfly, and antler.

Conclusion:

In the design of lighting systems, the heat of the lamps is an important issue. Heat sinks are used to dissipate this heat and increase the useful life of the system. Optimal management of the heat of light sources helps to increase the optical efficiency, the quality of the light spectrum and the longer life of the lamps.

Keyword:

Heat sink, heat, electrical components, cooling, heat sink

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