Wire type heating wire device

Abstract

The invention provides a wire type heating wire device, which is a single-line wire type heating wire. Insulating wires, temperature detecting wires and short circuit detecting wires are alternately arranged on the periphery of a high polymer layer. The wires are co-stranded and spirally wound so as to make a temperature control circuit and an inter-wire short circuit protecting circuit separated. In this way, inter-wire short circuit protection functions characterized by high precision, stable temperature control function, alleviated fluctuation and high safety are acquired. The economical effects are also great. Heating wires are wound on a roll core in a spiral way. The high polymer layer is formed on the periphery of the heating wires. At least one insulating wire serves as the temperature detecting wire and the short circuit detecting wire of a conductor and is alternately arranged on the periphery of the conductor. The wires are spirally wound in a co-strand way. Furthermore, an insulating coating layer is formed thereon. The temperature detecting wire and the short circuit detecting wire are separated spatially. Therefore, the temperature control by the temperature detecting wires and the inter-wire short circuit protection by the short circuit detecting wires are respectively independent and performed in a high-precision and non-fluctuation way.

Description

technical field [0001] The invention relates to a wire-shaped heating wire device used in planar heating appliances such as electric heating blankets and electric heating carpets. Background technique [0002] In general, wire-shaped heating wire devices used in surface heating appliances such as electric blankets and electric heating carpets are well known. A structure called a two-wire type consisting of a wire-shaped heating wire, and its structure is as follows image 3 shown. [0003] In this figure, the wire-like sensor wire 100 is composed of: a winding core 1a of a fiber bundle such as polyester fiber; an inner electrode wire 2a formed by spirally winding a copper or copper alloy conductor around the outer periphery of the winding core 1a; Thermally sensitive polymer layer 3a formed by extruding thermosensitive polymer resin on the outer periphery of inner electrode wire 2a; outer electrode wire formed by spirally winding copper or copper alloy conductors on the out...

AI Technical Summary

Problems solved by technology

[0054] However, even if the above preventive measures are taken, the temperature control part may fail. In order to prepare for the situation where the heat-sensitive polymer layer 3d is melted and a short circuit occurs between the heating wire 2d and the overheating detection wire 6d, a line-to-line short-circuit protection circuit, but as Figure 7 As shown, the circuit connection for line-to-line short-circuit protection that can adhere to the above-mentioned main purpose of "signal separation" can only be constructed as in the image 3 and Figure 5 As in the case of using the popular single-wire electric heating wire 102 described in , the line-to-line short-circuit protection operation with less fluctuation cannot be obtained.

[0055] Of course, with regard to the overheating detection wire 6d, it can also be used as a special device for short-circuit protection between lines with high sensitivity that flows through the AC half-wave current in two paths like the two-wire type, but it cannot constitute the overheating signal as the main purpose. The prevention circuit of the line short circuit caused by the

Therefore, as a means to achieve the purpose of Patent Document 5, the insulation coating treatment of the temperature detection wire 4d does not need to perform its function, so it is extremely uneconomical to use the overheat detection wire as a dedicated device for short circuit detection wires in the structure of Patent Document 5

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