Heat Pipe (HP) is composed of an outer shell, a capillary structure, and a working fluid. The shell of the heat pipe is filled with an appropriate working fluid, which is drawn into a certain vacuum state and sealed. When the surface of the heat pipe comes into contact with the heat source and is heated, the working fluid inside the heat pipe evaporates at the evaporation end, and the pressure rises, pushing the steam to flow to the condensation end. The steam condenses in the low-temperature environment of the condensation end, and the condensed liquid flows back to the evaporation end through the suction core, thus achieving cyclic operation.