Heat pipe technology is a heat transfer element called "heat pipe" invented by G.M. Grover of Los Alamos National Laboratory in the United States in 1963, which makes full use of the principle of heat conduction and the rapid heat transfer properties of the refrigeration medium, through the heat pipe to quickly transfer the heat of the heating object to the heat source, and its thermal conductivity exceeds the thermal conductivity of any known metal.
From a thermodynamic point of view, why do heat pipes have such good thermal conductivity? The heat absorption and heat release of the object are relative, and whenever there is a temperature difference, there will inevitably be a phenomenon of heat transfer from high temperature to low temperature. From the three ways of heat transfer: radiation, convection, conduction, of which heat conduction is the fastest. The heat pipe is the use of evaporative refrigeration, so that the temperature difference between the two ends of the heat pipe is very large, so that the heat is quickly conducted. Generally, heat pipes are composed of a tube shell, a liquid absorbent core and an end cap. The inside of the heat pipe is pumped into a negative pressure state and filled with an appropriate liquid, which has a low boiling point and is easy to volatilize. The tube wall has a liquid wick, which is made of a capillary porous material. When the heat pipe section is heated, the liquid in the capillary tube evaporates rapidly, the vapor flows to the other end under a small pressure difference, and releases heat, re-condenses into a liquid, and the liquid flows back to the evaporation section along the porous material by capillary force, so that the cycle continues, and the heat is transferred from one end of the heat pipe to the other. This cycle is fast, and heat can be continuously conducted.
Like the heat pipe in the notebook, it is not actually a real heat pipe, but a pure copper heat conduction element
