RU2599003C1 - Fabric with electromagnetic heating - Google Patents

Abstract

FIELD: textile.

SUBSTANCE: invention relates to design of special types of fabric and may be used in production of clothes and accessories for extreme conditions characterized by low values of ambient temperature. Fabric with electromagnetic heating is a cloth made by weaving of threads and comprises the main nonconductive threads having the first direction, and threads with electromagnetic heating having the second direction perpendicular to the first one, According to the invention heating threads are made in the form of electroconductive non-magnetic tubes, inside which there are magnetized elastic thread from hard-magnetic material, a gap between them is filled with elastic non-magnetic material or air. Fabric improves operational and technological quality of fabric allows cutting by arbitrary shape and area, provides even heating temperature. Fabric provides additional heat protection from overcooling users and equipment, available for a long time under low temperature, and may be used in production of sport tourist and military items.

EFFECT: technical effect consists in independent operation of cloth with electromagnetic heating and improved operational and technological properties.

1 cl, 2 dwg

Description

The invention relates to the textile industry, in particular to electric heating fabrics for industrial and domestic purposes, having in their structure electric heating threads.

Known electric heating fabric (RF patent No. 55782, D03D 15/00, 08.27.2006). The fabric contains a weave of electrical insulating warp and weft threads and electrically conductive carbon threads. In this case, groups of parallel conductive threads of 2-3 warp threads, adjacent or woven through an electrical insulating thread, are interwoven weft with an array of conductive threads of material with high electrical conductivity, forming a current-carrying tape.

The disadvantage of this fabric is the complexity of the structure of the fabric and the complexity of its production, as well as the need for an electric current source to provide electrical heating.

Electric heating fabric is also known (RF patent No. 2109091, D03D 15/00, 04/20/1998). This fabric contains a background part formed by interweaving electrical insulating warp and weft threads and electrically conductive threads. The latter form within the background part of the tissue groups of m parallel electrically conductive threads. In each group, adjacent electrically conductive filaments are located at a predetermined distance b from one another, selected from the condition of the thermal balance of the medium surrounding the electric heating fabric during its functioning.

The disadvantage of such a fabric is that for the use of fabric requires additional conductors and the connection of each electrical conductive thread to them, as well as the need for a source of electrical voltage. This leads to operating costs and degrades consumer properties.

Closest to the invention in terms of the number of similar essential features is electric heating fabric (RF patent No. 2212120, Н05В 3/34, 09/10/2003). It is a web made by interweaving threads, and contains the main non-conductive threads having a first direction, and conductive resistive threads having a second direction perpendicular to the first. The fabric also includes at least two main conductive busbars and distribution buses, separated from the conductive resistive wires by dielectric barriers of non-conductive threads of cotton or synthetic fiber, in which circuit breakers are located. Means for connecting current-carrying connecting wires are located in holes made in the main non-conductive threads. The main non-conductive threads have a plain type of weaving with the aforementioned non-conductive threads. Electrically conductive resistive filaments, when an electric current flows through them, will heat up and therefore can be called heating.

The disadvantages of the prototype can be attributed to the need for an external source of electrical energy, which limits the heating time, and also increases the mass of the final product, for example, clothes from this fabric.

The objective of the invention is to increase the reliability of the functioning of the tissue and expand the functionality of the use of this fabric.

The technical result of the invention consists in the autonomy of the fabric with electromagnetic heating and improving its operational and technological properties.

The problem is solved, and the technical result is achieved by the fact that the proposed fabric, which is a fabric made by interweaving threads, and containing the main non-conductive filaments having a first direction, and heating threads with electromagnetic heating having a second direction perpendicular to the first, according to the invention, heating threads made in the form of electrically conductive non-magnetic tubes, inside of which magnetized elastic strands of magnetically hard material are fixed, and the gap between them is Full elastic non-magnetic material or air.

The invention is illustrated by drawings. In FIG. 1 shows a diagram of a device for heating threads with electromagnetic heating. In FIG. 2 shows a diagram of the formation of a magnetic field and eddy currents in heating threads with electromagnetic heating.

The fabric with electromagnetic heating contains heating filaments, which are tubular fibers 1, which are made in the form of electrically conductive non-magnetic tubes (Fig. 1). Inside these tubular fibers 1 with a gap of 3, threadlike permanent magnets 2 are placed, which are magnetized elastic filaments of hard magnetic material that are connected to the tubular fibers 1 (Fig. 1). The gap 3 between the filamentary permanent magnets 2 and the tubular fibers 1 is filled with elastic, or elastic material, or air (Fig. 1).

The inventive fabric with electromagnetic heating, unlike the known electric heating fabrics, works autonomously, without sources of electrical voltage. This is explained by the operation of heating threads with electromagnetic heating, which occurs as follows. The filamentous permanent magnets 2 create a magnetic field whose lines of force cross the electrically conductive tubular fiber 1 (Fig. 2). During mechanical actions of a person when walking and running, due to the inertia and elastic coupling of the threadlike permanent magnets 2 with the tubular fibers 1, their relative vibrations occur. In general, relative vibrations can have a longitudinal and transverse component.

With longitudinal vibrations, the lines of force of the magnetic field intersect the electrically conductive tubular fibers 1, due to which eddy currents (Foucault currents) arise in the latter. The direction of these currents is such that they begin to inhibit the relative motion of the threadlike permanent magnets 2 and the tubular fibers 1.

With transverse vibrations, there is an increase in the field induction in the approaching part of the tubular fiber 1 and a decrease in the induction in the moving part of the tubular fiber 1 (Fig. 2). This changes the magnetic flux through the conductive circuits in the tubular fiber 1, in which eddy currents are induced, which also impede mutual motion.

The flow of eddy currents is accompanied by heat in accordance with the Joule-Lenz law, which leads to heating of the tubular fibers 1 and the entire tissue layer. The amount of heat released, and therefore the heating temperature, is determined by the magnitude of the magnetic field induction, the amplitude and frequency of the relative oscillations, as well as the electrical resistance along the path of their flow.

The advantages of fabrics with electromagnetic heating are that they can improve performance, since there is no need to ensure the reliability of electrical contacts, charge batteries or replace batteries, etc. A fabric with electromagnetic heating also has greater reliability, since the magnitude and uniformity of heating practically does not change with local damage to individual threads, in contrast to the known electric heating fabrics. The fabric provides additional thermal protection against overcooling of users and equipment that are located for a long time at low temperatures, and can be used in the manufacture of sports, tourism and military products.

Claims (1)

A fabric, which is a web made by interweaving threads, and containing the main non-conductive threads having a first direction, and heating threads having a second direction perpendicular to the first, characterized in that the heating threads are made in the form of electrically conductive non-magnetic tubes, inside of which magnetized elastic threads are fixed from hard magnetic material, and the gap between them is filled with elastic non-magnetic material or air.

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