| 摘要 |
PURPOSE: An electric heating device for a plastic greenhouse is provided to enable users to easily manage the device, and to offer thermal efficiency of the optimal level. CONSTITUTION: A heating unit (110) generates heat when electricity is applied, and is formed of more than one heating unit with a plate shape. A thermal insulation protecting unit includes an insertion unit for inserting the heating unit. A pair of power connecting layers (112) is arranged on the upper and lower sides in parallel. A heating layer (111) is formed by arranging at least one material sheet in a rod shape in parallel, and generates heat when electricity is applied. An inner protective layer (113) is located on the front and rear sides of the heating layer and the power connecting layers. A power direct connecting layer (112a) is connected to an external power source. A power assistant connecting layer (112b) has the higher electrical conductivity than the power direct connecting layer. |
