CN2746699Y

CN2746699Y - Self-limited electric heating band

Info

Publication number: CN2746699Y
Application number: CN 200420109303
Authority: CN
Inventors: 程巍; 程崇钧
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-11-30
Filing date: 2004-11-30
Publication date: 2005-12-14
Anticipated expiration: 2014-11-30

Abstract

The utility model discloses a self-limited electric heating band, relating to the technical field of the electric heating band, and comprising an electricity conducting wire core, a PTC material layer, an insulating layer, a shielding layer and a strengthen protective layer. The PTC materials are squeezed between the two electricity conducting wire cores and outside the two electricity conducting wire cores to form a PTC core band; the insulating layer, the shielding layer and the strengthen protective layer are packaged outside the PTC core band; the electricity conducting wire cores of the self-limited electric heating band is a hollow-flat structure. When the self-limited electric heating band having the high power or big using length produced by the utility model is used, in the condition that the cross sections of the electricity conducting cores are the same, the PTC material consumption of manufacturing the PTC core band is largely reduced, the heating area of the core band is increased and the bending property of the product is reinforced.

Description

A kind of self-limited type ribbon heater

Technical field

Technical solutions of the utility model relate to the self-limited type ribbon heater, particularly a kind of high-power wide type self-limited type heat tape.

Background technology

In the prior art, the self-limited type ribbon heater is by conductive core line, be extruded between two strands of conductive core lines ptc material form the heat generating core band, at the outside extruded insulation layer of PTC core band, woven shield and extrude heavy seal coat again and form, but because this self-limited type ribbon heater self self-regulated temperature control, it is widely used in multiple fields such as antifreeze, insulation, heating; But make because the conductive core line of this self-limited type ribbon heater all press the regular stranded method of electric wire conductor wire core, the conductor wire core after stranded is cylindrical, and makes the cross section that extrudes ptc material composition heat generating core band be flat; When making big nominal power output or increasing the product that uses length, must strengthen the diameter of conductive core line, so the corresponding increase in PTC core band cross section.The defective that exists is: 1. the consumption with kind unit product ptc material increases; 2. the bending property of finished product reduces.

The utility model content

Technical problem to be solved in the utility model is, design a kind of self-limited type ribbon heater, when increasing the nominal power output or increase single use length, do not increase PTC core band cross section too much, thereby solve the technical problem that prior art too much consumes ptc material and reduces its bending property because of the conductor wire cross section increases.

The technical scheme of the utility model technical solution problem is: it is made up of conductor wire core, ptc layer, insulating barrier, screen and reinforcement sheath, ptc material is extruded between two strands of conductor wire cores and the outside, form PTC core band, insulating barrier, screen and reinforcement sheath are wrapped in the outside of PTC core band, and its conductor wire core is the flat structure of hollow.The hollow structure of above-mentioned conductor wire core is meant the structure that has inner chamber, can be for there being the gap, or form the structure that inwall fits; The flat structure of above-mentioned conductor wire core refers to that its width is much larger than thickness.

The chamber wall of conductor wire core is formed by metal wire knitted.

The inner chamber of conductor wire core can be provided with metallic foil.

Adopt technique scheme, because conductor wire core is the flat structure of hollow, therefore under the situation of the conductor wire core of same cross-sectional, the material usage of PTC significantly reduces when making PTC core band, can save ptc material about 20%, by adjusting cross section and the spacing that two money paid for shares belong to braid over braid, can increase heating area, increase power output, also strengthened the bending property of product simultaneously.

Description of drawings

Fig. 1 is the example structure schematic diagram of a kind of optimal design of the utility model;

Fig. 2 is the metallic braid cross section structure schematic diagram that is provided with metallic foil.

In the drawings:

Metallic braid 1; Metallic foil 2; PTC core band 3; Insulating barrier 4; Screen 5; Strengthen sheath 6.

Embodiment

In conjunction with Fig. 1, Fig. 2, a kind of self-limited type ribbon heater, it is made up of flat metallic braid 1, ptc layer, insulating barrier 4, screen 5 and reinforcement sheath 6, ptc material is extruded between the metallic braid 1 and the outside PTC of formation core band 3, insulating barrier 4, screen 5 and reinforcement sheath 6 are wrapped in the outside of PTC core band 3, the cross section of PTC core band 3 is flat, and promptly top and bottom are parallel, and left and right sides is circular arc.The tubular metal band that is flat that metallic braid 1 forms for repressed metal wire knitted is for preventing that heavy in section metallic braid 1 because of the blank pipe phenomenon that wire excessively slightly causes, can be provided with metallic foil 2 in the inner chamber of metallic braid 1.

Claims

1, a kind of self-limited type ribbon heater, it is made up of conductor wire core, ptc layer, insulating barrier (4), screen (5) and reinforcement sheath (6), ptc material is extruded between two strands of conductor wire cores and the outside, form PTC core band (3), insulating barrier (4), screen (5) and reinforcement sheath (6) are wrapped in the outside of PTC core band (3), and it is characterized in that: its conductor wire core (1) is the flat structure of hollow.

2, self-limited type according to claim 1 ribbon heater, it is characterized in that: the chamber wall of conductor wire core (1) is formed by metal wire knitted.

3, self-limited type according to claim 1 and 2 ribbon heater, it is characterized in that: the inner chamber of conductor wire core (1) can be provided with metallic foil (2).