Electrothermal film and heating structure

Abstract

The invention discloses an electric heating film and a heating structure. The electrothermal film includes a heating layer, at least one side of the heating layer is closely attached to a fireproof insulation layer, and a shielding layer is stacked on the fireproofing insulation layer, and the shielding layer is electrically connected to the neutral terminal of the heating layer. connection, the heating layer is also provided with live wire terminals. Even if the electrothermal film provided by the embodiment of the present invention is damaged by puncture or the like during construction, it can still be used normally; due to the existence of the fireproof insulation layer, it can ensure that the local structure damaged by perforation will not be further expanded due to burning or ignition. Therefore, the risk of current leakage can be greatly reduced, and the leakage protection device of the entire circuit will not be tripped; at the same time, the electric heating film provided by the embodiment of the present invention has a relatively large contact resistance due to the carbon-based heating layer, so there is almost no risk of contact electric shock, and it is safe to use high sex.

Description

technical field [0001] The invention relates to an electric heating film structure, in particular to an electric heating film and a heating structure, and belongs to the technical field of electric heating film. Background technique [0002] With the improvement of people's living standards and the advancement of science and technology, electrothermal film, as a new star in the field of floor heating and heating, is more and more popular because of its large heating area, energy saving and environmental protection, rapid heating, high conversion efficiency of far infrared rays, and the function of physical therapy and health care. favored by more and more consumers. However, in the actual laying process, especially when the cement mortar is covered above the electrothermal film, due to the formation of distributed capacitance between the planar heating electrothermal film and the cement mortar layer, it is easy to cause the leakage current of the distributed capacitance; Th...

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Problems solved by technology

[0003] see figure 1 , in the existing actual construction, the traditional electrothermal film with shielding layer is perforated (destroying the hole or destroying the structure such as figure 1 Mark 6 in ) after electrification, the heating layer 1 and shielding layer 2 of the electrothermal film will be partially short-circuited and ignited. As a result, the continuous combustion phenomenon of the electrothermal film occurs; and, since the structure of the electrothermal film is usually composed of a polymer film such as PET and a heat-generating layer, it is difficult for this structure not to be pierced by nails or sharp stones. The shielding layer with almost the same area of ​​the heating layer is very easy to form a local short circuit with the heating layer (the shielding layer is the neutral line, and the circuit voltage division of the heating layer is 0V~220V), especially the perforated part with a large voltage difference (120V~220V) will Sparking occurs, and the resulting high temperature further causes the polymer films such as PET in the electrothermal film structure to burn, causing huge safety hazards

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