KR930022400A - Safe parallel type constant output heating wire and its manufacturing method - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parallel type constant output heating wire and a method for manufacturing the same. More specifically, the present invention provides a power source that is supplied to a nichrome wire at a high temperature by using a polymer material having a PTC (constant temperature coefficient resistance) property in addition to a conventional nichrome wire. It is related to a heating wire and a method of manufacturing the same to prevent overheating and to provide fundamental safety so that it is safe even in case of an accident. In the parallel type constant output heating wire of the present invention, the conductor and the nichrome wire are connected in the order of the conductor, the conductive adhesive, the PTC polymer sheet having the PTC characteristics, and the nichrome wire, so that the current is supplied to the nichrome wire through the PTC polymer material. In the manufacturing process of the product of the present invention, the conductor is extruded together with the insulator, the insulator is peeled off so that the conductor is exposed to the outside in order to make the connection part, and then the conductive adhesive is applied to the connection part, and the PTC polymer sheet After attaching to the connection part, cover the insulation tube on the PTC polymer sheet, wrap the nichrome wire at a constant pitch on the cable, apply conductive adhesive to the contact part between the nichrome wire and the PTC polymer sheet, and then And extruding the insulating jacket for the step. The parallel constant output heating wire of the present invention configured as described above has a structure in which the PTC polymer material and the nichrome wire are connected in series in each heating region. Therefore, when the temperature of the heating wire rises to the melting temperature of the PTC polymer, the resistance of the PTC polymer sheet increases rapidly. Since the power supply to the nichrome wire is cut off, further heat generation can be prevented.

Description

Safe parallel type constant output heating wire and its manufacturing method

Since this is an open matter, no full text was included.

Figure 4 is a schematic diagram showing the structure of the safe parallel constant output heating wire of the present invention

5 is a sectional view taken along the line B-B of the fourth.

Claims (6)

Two conductors 1 inserted near both ends of the rod-shaped insulator 2 having an elliptical cross-sectional shape, and are positioned at regular intervals in the longitudinal direction of the two conductors 1 and alternately positioned with each other. The electroconductive adhesive 9 applied to the connecting portions 4 of both sides of the insulator 1 stripped to the extent that 1) is exposed to the outside, and the conductive having a width that can sufficiently cover the stripped connecting portions 4. The PCT polymer sheet 8 is a rectangular PTC polymer sheet 8 attached to the adhesive 9 and a tubular body wider than the width of the stripped connecting portion 4 and narrower than the width of the PCT polymer sheet 8. Nichrome wire (3), the nichrome wire (3) and the PTC polymer sheet which are wound on the insulating tube (10) and the insulating material (2) over a predetermined pitch and are in contact with the PTC polymer sheet (8) The conductive connection 12 which improves contact with (8) and a cable as the outermost layer Consists of a jacket (5) insulation surrounding the PTC polymer material and the nichrome wire is safe parallel constant power heating element, it characterized in that it has a structure connected in series. The crystalline polymer according to claim 1, wherein the PTC polymer sheet 8 has a volume resistance of about 10 ⁰ -10 ² Ωcm at room temperature, and has a volume resistance of about 10 ⁵ -10 ⁷ Ωcm at a temperature higher than the melting temperature. A safe parallel type constant output heating wire, characterized in that the blend of carbon black is a crosslinked PTC polymer material. The method of claim 2, wherein the crystalline polymer is polyethylene (PE), polyvinylidene fluoride (PVdF), characterized in that the parallel constant output heating wire safe. The two parallel conductors 1 are extruded together with the insulator 2 and insulated from the two conductors 1 at regular intervals in the longitudinal direction and alternately positioned with each other. 2) is stripped by a predetermined length so that the conductor 1 is exposed to the outside, and then a conductive adhesive 9 is applied to the stripped connection portion, and the PTC polymer sheet 8 is attached to the connection portion 4. After attaching to the insulating film 10, which is wider than the width of the stripped connection part 4 and narrower than the width of the PTC polymer sheet 8, the nichrome wire 3 is placed on the PTC polymer sheet 8. ) Is wound on the cable at a constant pitch, and the conductive adhesive 11 is applied to the contact portion between the nichrome wire 3 and the PTC polymer sheet 8, and then extruding the insulating jacket 5 for insulation from the outside. Method for manufacturing a safe parallel constant output heating wire consisting of. The method of claim 4, wherein the PTC polymer sheet 8 is a PTC polymer material which is irradiated and crosslinked after extrusion of the sheet by blending an appropriate amount of carbon black to the crystalline polymer, and has a volume resistance of about 10 ⁰ -10 ² Ωcm at room temperature, A method for producing a safe parallel constant output heating wire having a volume resistance of about 10 ⁵ -10 ⁷ Ωcm at a temperature above the melting point. The method of claim 5, wherein the crystalline molecules are polyethylene (PE) or polyvinylidene fluoride (PVdF). ※ Note: The disclosure is based on the initial application.