Electrode connection structure of semi-conductor electric heating piece

Abstract

The invention provides an electrode connection structure of a semi-conductor electric heating piece, which belongs to the technical field of semi-conductor electric heating, and solves the problems that after a traditional semi-conductor electric heating piece is used for a long time, the contact area of the outer surface of an electrode with the piece body is reduced and the contact resistance between the electrode and the piece body is increased because of the thermal expansion and contraction of the piece body. In the electrode connection structure of the semi-conductor electric heating piece, the semi-conductor electric heating piece comprises a piece body and an electrode which is inlaid in the piece body; and the electrode is a strip structure which is hollow inside and is provided with a mesh hole on the side surface, the piece body on the inner side of the electrode and the piece body on the outer side of the electrode are connected with the piece body which passes through themesh hole. The electrode connection structure can increase the conductive contact area between the piece body and the electrode, the contact area when in temperature rise is basically unchanged, and the contact resistance between the electrode and the piece body is reduced.

Description

technical field [0001] The invention belongs to the technical field of semiconductor electric heating, and relates to an electrode connection structure, in particular to an electrode connection structure of a semiconductor electric heating element. Background technique [0002] The semiconductor heating element has the dual functions of converting electrical energy into heat energy and automatically limiting the temperature. Flexible semiconductor heating elements can be applied to floor heating, pipes, valves, pump bodies, storage tanks and other devices, such as electric heating film, heating cable, heating cable, self-limiting temperature heating sheet, etc. [0003] Existing semiconductor heating elements include a main body and two electrodes embedded in the main body. The main body is mainly made of conductive and heating semiconductor materials, and the electrodes are solid copper strands, copper sheets, printed electrodes or copper braided wires. Since the outer sur...

AI Technical Summary

Problems solved by technology

[0004] When this kind of semiconductor electric heating element is used at the beginning, its performance can meet the technical requirements, but as the use time prolongs, the body will expand and contract due to heat, resulting in the reduction of the contact area between the outer surface of the electrode and the body, and the contact between the electrode and the body. The contact resistance between them becomes very large, which greatly affects the performance of the semiconductor

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