Patent ID: 11930564
Assignee: CHONGQING LE-MARK TECHNOLOGY CO
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  F | IPC F  H

Claim 3:
4. A ceramic electric heating element wherein:
the ceramic electric heating element has four layers that include, from the inside out, an inner conducting layer (1), an inner insulating layer (2), a resistive layer (11), and an outer insulating layer (5), respectively;
the inner conducting layer (1) is located in the center of the ceramic electric heating element;
the inner insulating layer (2) wraps the inner conducting layer (1) on the outside, and the inner insulating layer (2) is divided into two segments, with the peripheral profile of the lower segment being greater than that of the upper segment;
the resistive layer (11) wraps the upper part of the inner insulating layer (2) on the outside, and the resistive layer (11) is divided into two segments, with the peripheral profile of the upper segment being less than that of the lower segment, and the peripheral profile of the lower segment of the resistive layer (11) equaling to that of the lower segment of the inner insulating layer (2);
the outer insulating layer (5) wraps the upper segment of the resistive layer (11) on the outside, with the peripheral profile of the outer insulating layer (5) equaling to that of the lower segment of the resistive layer (11);
the lower part of the inner conducting layer (1) has a spot (7) where a central electrode is located, the upper end of the inner resistive layer (11) has a connecting hole (8), and the outside of the lower part of the resistive layer (11) has a spot (9) where a side electrode is connected;
the spot (7) where the central electrode is located is solid; and
an electrically conductive ceramic electrode is welded to the spot (7).