The processor uses graphite to conduct heat to the metal casing for heat dissipation. The vents you mentioned are not available yet, but Apple has a patent for micro-turbine heat dissipation. The air is sucked from the headphone port or speaker port into the mobile device for heat dissipation. Now It has not been used yet, but the disadvantage is that it becomes a vacuum cleaner, and a large amount of dust enters the body and heat accumulates more easily.
1. Basic concepts
1. The methods of heat dissipation include radiation heat dissipation, conduction heat dissipation, convection heat dissipation, and evaporation heat dissipation. The heat generated by various tissues and organs of the body is evenly distributed throughout the body along with blood circulation.
2. When blood flows through the blood vessels of the skin, 90% of all heat is dissipated from the skin, so the skin is the main part of the human body that dissipates heat. There is also a small amount of heat that is dissipated out of the body through breathing, urine and feces through the lungs, kidneys and digestive tract.
2. Conduction heat dissipation
1. Conduction heat dissipation (thermal conduction) refers to a heat dissipation method in which the heat of the body is directly transferred to a lower-temperature object in contact with it.
2. The heat dissipated in this way depends on the temperature difference between the skin temperature and the contact object, the contact area, and the thermal conductivity of the object in contact with the skin. The thermal conductivity of air is small, and the amount of heat dissipated through direct conduction in the air is very small. Cotton and wool fabrics are also poor conductors of heat, so not much body heat is lost through conduction.
3. In addition, the thermal conductivity of human fat is also small, so it is difficult for obese people to transfer heat from the deep body to the surface, and they are prone to sweating in hot weather. Since water has a large specific heat and good thermal conductivity, the thermal conductivity of water is often used in clinical treatment for local heating or ice caps, ice packs, etc. are used to cool down patients with high fever.