The definition of the heat sink

Heat sink is a device for radiating easily heating electronic components in electrical appliances. Heat sink is mostly made of aluminum alloy, brass or bronze in plate, sheet, multi sheet, etc. for example, a considerable heat sink should be used for CPU in computer, and a heat sink should be used for power tube, line tube and power amplifier tube in TV. Generally, during the use of the heat sink, a layer of thermal conductive silicone grease shall be coated on the contact surface between the electronic components and the heat sink, so that the heat emitted by the components can be more effectively transmitted to the heat sink, and then distributed to the surrounding air through the heat sink.