Heat pipe is a new type of heat transfer element with extremely high thermal conductivity. It transfers heat through the evaporation and condensation of liquid in a fully enclosed vacuum tube. It uses fluid principle such as siphon effect to achieve good refrigeration effect. It has the characteristics of extremely high heat conductivity, good isothermal property, free change of heat transfer area on both sides of cold and hot, long-distance heat transfer, temperature control, etc.

A typical gravity heat pipe is firstly vacuumized in a closed pipe. In this state, an appropriate amount of working medium is filled and heated at the lower end of the heat pipe. The working medium absorbs heat and vaporizes into steam. Under a small pressure difference, it rises to the upper end of the heat pipe, releases heat to the outside world, and condenses into liquid. Under the action of gravity, the condensate returns to the heating section along the inner wall of the heat pipe, and is heated and vaporized again, so as to transfer heat continuously from one end to the other. Due to the phase change heat transfer, the thermal resistance in the heat pipe is very small.

The heat pipe has the advantage of extremely fast heat transfer speed. It can effectively reduce the thermal resistance value and increase the heat dissipation efficiency when installed in the radiator. It has extremely high thermal conductivity, up to hundreds of times the thermal conductivity of pure copper. It is reputed as a "thermal superconductor".

Heat pipe heat dissipation has the following advantages:

● Heat pipe heat dissipation technology has the advantages of good heat dissipation effect, relatively small thermal resistance, long service life and fast heat transfer. The thermal conductivity of heat pipe is more than 100 times that of ordinary metal;

● The direction of heat transfer is reversible, and either end can become the evaporation end and condensation end;

● Excellent thermal responsiveness. The vaporized steam in the heat pipe can be transmitted at a speed close to the sound speed, thereby effectively improving the heat conduction effect;

● Simple and compact structure, light weight, small volume and convenient maintenance;

● No power consumption, no noise, in line with the industrial "green" requirements;

● It can be used in the environment without gravity field.