Linear heating wire device

Abstract

Provided is a linear heating wire device, which is a single-line linear heating wire, and a temperature detection core wire and a short circuit detection core wire interactively winding around the outer circumference of a polymer layer at certain intervals spirally, so that a temperature control circuit and an interline short circuit protection circuit are separated, and a high-precision and stable temperature control function and a interline short circuit protection function with little fluctuation and high security are obtained in an economical way. A heating core wire (2) is spirally wounded around a roll core (1); a polymer layer (3) is formed around the roll core (1); a temperature detection core wire (4) and a short circuit detection core wire (6) are interactively kept from each at a certain distance on the outer circumference of the roll core (1), and are spirally wounded in a manner of biting into the polymer layer; and an insulation covering layer (5) is further formed on the roll core (1). Since the temperature detection core wire and the short circuit detection core wire are separated in space, the temperature control of the temperature detection core wire and the interline short circuit protection of the short circuit detection core wire can be performed independently, highly precisely with no fluctuation.

Description

technical field [0001] The invention relates to a linear heating wire device used in planar heating appliances such as electric heating blankets and electric heating carpets. Background technique [0002] In general, the linear heating wires used in surface heating appliances such as electric heating carpets are well known. The structure formed by the hot line is called a double-line structure, and its structure is as follows image 3 shown. [0003] In this figure, the linear sensor wire 100 is composed of a winding core 1a of a fiber bundle such as polyester fiber, and an inner electrode core wire 2a formed by spirally winding a copper or copper alloy conductor on the outer periphery of the winding core 1a. ; The heat-sensitive polymer layer 3a formed by extruding a heat-sensitive polymer resin on the outer periphery of the inner electrode core wire 2a; the outer electrode formed by winding a copper or copper alloy conductor in a spiral shape on the outer periphery of the...

AI Technical Summary

Problems solved by technology

[0026] Therefore, the existing two-wire linear heating line method composed of a linear sensing line and a linear heating line is a good configuration that can completely separate the temperature control function and the safety protection function, and the fusing time difference caused by the short circuit position between the lines There is still a margin within the allowable range, which is an excellent method of safety, but because two wires are used, the cost is very high and uneconomical, and because the thermally sensitive polymer layer 3a changes greatly with time, there are Large problem that stable temperature control cannot be performed for a long time

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