A heat pipe is a device that uses the principle that the medium inside needs to absorb (liquid to vapor) or release a large amount of heat (vapor to liquid) during a two-phase change to achieve rapid heat absorption and release and to transfer the heat to another place quickly. Strictly speaking, heat pipes can only be considered part of a heat sink and can be called a thermal conductivity element rather than a heat dissipation element. This means that there is no point in installing a heat pipe when only one end is placed on the heat source and the other end does not have any heat sink or surface for heat dissipation.