The uniform surface temperature of the electric heat pipe will directly affect the actual use effect, life and safety of the electric heat pipe. The main reason for the temperature difference on the surface of the electric heat pipe is the uneven density and eccentricity inside the electric heat pipe, which eventually leads to the uneven temperature.
The uneven density means that the electric heating wire is arranged very closely in a certain section of the electric heating tube, and the other section is arranged very loosely or even pulled into a straight line, at which time the electric heating tube will have a serious temperature imbalance. If the heating wires in the tube are not evenly arranged, the spiral ring of the heating wires on the unit length. As a result, the power of this section will increase with the increase of the number of turns, and the phenomenon of local power will increase, resulting in uneven temperature, and on the contrary, the power per unit length is small. The surface load is the power per unit area on the heating surface, because the local power increases, the local surface load correspondingly increases. The surface load is closely related to the surface temperature, the surface load increases, the surface temperature of the electric heat pipe increases, the surface load decreases, the temperature of the electric heat pipe surface decreases.
The so-called eccentricity refers to the central axis of the spiral electric heating wire deviates from the central axis of the electric heat pipe, so that the electric heating wire is too close to the wall of the electric heating tube on one side, and there is a larger distance with the other side, considering the thermal conductivity of the heat transfer medium and the thickness of the heat transfer medium on both sides is inconsistent, resulting in uneven tube surface temperature.
