| 摘要 |
PURPOSE: A heating device is provided to increase the speed of heat transferred from a heating part to a metal pipe because a liquid-phase substance is integrated with the metal pipe by being spread on the outer circumference of the metal pipe. CONSTITUTION: A heating device (1) comprises a metal pipe, a heating part (30), a first coating layer (20), and a second coating layer (40). Fluid passes the metal pipe. The heating part is wound on the circumference of the metal pipe and applies heat into the metal pipe. The first coating layer is positioned between the heating part and the metal pipe and is coated on the outer circumference of the metal pipe. The second coating layer covers the heating part to protect the heating part from external factors. |
