Electric heating mat

A surface heater and electrode technology, applied in ohmic resistance heating, heating method, electric heating system, etc., can solve the problems of residual current flow and energy consumption, etc.

Pending Publication Date: 2021-07-09
THURINGISCHES INSTITUT FUR TEXTIL & KUNST FORSCHUNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this solution is that, due to the finite resistance still present, there is still a residual current flowing even in the absence of a load, with the result that a small amount of energy is permanently dissipated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] This example shows the working principle of the invention. Conductive PE foam (ELS-M) with dimensions 470x320 mm and thickness 6 mm is covered on both sides with mesh electrodes made of stainless steel. Mesh electrodes consisted of stainless steel wires with a mesh width of 1.4 mm and were loosely fixed to the foam at the edges. PET plastic filaments with a diameter of 0.5 mm and an interval of about 6 cm were woven into the wire mesh as a spacer between the lower mesh electrode and the conductive foam. 28 foam sheets (2 mm thick) were bonded approximately 8 cm apart from each other as spacers between the upper mesh electrode and the conductive foam. In principle, other materials and body shapes can also be used as spacers, as long as they do not prevent large-area contact between the electrodes and the conductive foam when loaded.

[0025] If a voltage of 60V is applied across the electrodes, no measurable current flows through the heating pad with no load (no load)....

example 2

[0029] This example shows the significance of spacers for reducing the no-load current in the no-load situation, whereby no spacers are used. Conductive foam with dimensions 21x21 cm and thickness 7 mm is covered with mesh electrodes made of stainless steel on both sides. Mesh electrodes consisted of stainless steel wires with a mesh width of 1.4 mm and were loosely fixed to the foam at the edges. There are no spacers. If a voltage of 60 V is applied to the electrodes, a small but easily measurable current (10 mA) flows through the heating pad without load, caused by random point contacts. If the pad is locally loaded, a higher current than in example 1 starts to flow at this location.

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Abstract

The invention relates to an electric surface heater, or heating mat, based on an electrically conductive polymer foil or a conductive polymer foam that only heats locally where persons, animals or objects are positioned on the mat. Energy can thereby be saved in comparison with a full-area heater. Ideally, this local heat generation functions without any external electronic control or regulation.

Description

technical field [0001] The present invention relates to an electric surface heater or heating pad based on conductive polymer film or conductive polymer foam, which only locally heats the place of a person, animal or object on the pad. Energy can thus be saved compared to full-area heaters. Ideally, this localized heat generation works without any external electronic control or regulation. Background technique [0002] Electric surface heaters have many applications, especially as wall heaters, floor heaters, mirror heaters, terrarium heaters, water bed heaters, heated floor mats, etc. For example, to heat a room, a large area of ​​heat output is required, whereas in the case of heatable floor mats or heated blankets for domestic pets such as dogs, heat is only required where there is direct contact. [0003] Known electric surface heating systems generate heat by converting electrical energy (Joule heating). They consist, for example, of electrically conductive plastics ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/03H05B3/02H05B3/34
CPCH05B3/02H05B3/03H05B3/34H05B3/146H05B3/267H05B2203/013H05B2203/02H05B2203/026H05B3/14H05B2203/029F24D13/022H05B1/0202H05B2203/01H05B2203/016H05B2214/04
Inventor M·施罗德H·沙赫L·萨博M·埃赫哈特
Owner THURINGISCHES INSTITUT FUR TEXTIL & KUNST FORSCHUNG
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