Double heat pipe

There are three types of double heat pipes, which are for cooling, heat storage, and all-weather. For cooling, the heat absorbed from the outside is absorbed to the inside, and when it is transported to the upper part, the cooling water takes out the heat remaining inside and improves the cooling efficiency. On the contrary, for heat storage, heat is released to the outside to heat, and heat stored in the interior heats up, and the heat stored in the heat dissipates even after the heating is stopped. The all-weather type is a heat pipe that can be used without any restrictions in environments where it is difficult to tilt.