| 摘要 |
<p>A heater, comprising: a first metal sheathing plate (10); a second metal sheathing plate (20) and an electric heating core plate which is interposed between the first metal sheathing plate (10) and the second metal sheathing plate (20). The electric heating core plate is composed of an insulating plate and a heating wire that wounded around the insulating plate. Insulating mats are arranged in between the first metal sheathing plate (10), the second metal sheathing plate (20) and the electric heating core plate. A scarf joint hole (200) is provided in the electric heating core plate (20). An insulating stool (30) is arranged in the scarf joint hole (200). A through hole (300) is arranged in the center of the insulating stool (30). The heating wire is leaded out through the through hole (300) by a lead wire (40). Thereby it can prevent the contact of the lead wire (40) and the second metal sheathing plate (20), so the short circuit is avoided.</p> |
