Flat-shaped ceramic electric heating element

Abstract

A flat-shaped ceramic electric heating element, which comprises an outer conductive layer, an outer resistive layer, an inner insulating layer and an inner insulating reinforcement layer, wherein the outer conductive layer is located at upper segments on two sides of the outer resistive layer, and a positive electrode site and a negative electrode site are provided on an end face of the outer conductive layer. The cross section of the flat-shaped ceramic electric heating element is a square structural body. The flat-shaped ceramic electric heating element further comprises a head conductive layer, which wraps around a bottom end of the outer resistive layer. Compared with a previous heating body for left and right circuits in the company, the middle flat-shaped ceramic electric heating element in the present disclosure has a longitudinal insulating groove eliminated, such that the strength of a product is effectively improved, premature fracture caused by cyclic impacts of thermal stresses is avoided, and changes in resistance distribution and migration of a temperature region brought about by the continuous expansion of a stress crack are also avoided.

Dependencies are inferred from the claim text.