Electric heating film having anti-leakage function

Abstract

The invention discloses an electric heating film having an anti-leakage function, which comprises upper and lower two layers of insulation films, wherein a conductive heating layer is clamped between the two layers of insulation films; the conductive heating layer is connected to a power line electrode and a null line electrode; second conductive layers connected to the null line electrode are covered outside of the insulation films; and second insulation layers are covered outside of the second conductive layers. A loop can be formed between the generated leaked current and the null line electrode, namely the leaked current can be utilized for generating heat, thereby increasing the heat conversion power and saving electric energy as well as avoiding the problem of influence on the normal work of the electric heating film caused by frequently driving a leakage protector to act by the leaked current. The electric heating film can be assembled according to an assembling operation specification for the electric heating film and the potential safety hazard caused by the leakage of the conductive layers can be eliminated, thereby increasing the assembling efficiency in unit area and improving the warming effect.

Description

technical field [0001] The invention relates to an electric heating film, in particular to an electric heating film with the function of preventing electric leakage, which can increase the installation power per unit area, save electric energy, and is safe and reliable. Background technique [0002] At present, electrothermal film has been widely used in geothermal heating for buildings. The existing electric heating film is equipped with upper and lower insulating films (made of PVC, PET, PC, PI and other materials), and a conductive heating layer (conductive ink or metal film lines, carbon fiber, etc.) is sandwiched between the two insulating films. , The conductive heating layer is connected to the live wire electrode and the neutral wire electrode. When in use, the live wire electrode is connected to the mains 220V voltage live wire, and the neutral wire electrode is connected to the mains 220V voltage neutral wire. Due to the large heating area of ​​the electrothermal ...

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Problems solved by technology

[0003] 1. If the electric heating film installation operation rules are followed, that is, a leakage protector (air switch) is installed in the circuit connecting the conductive heating layer and the power supply, the leakage current generated is enough to make the leakage protector operate, the switch is disconnected, and the electric heating film loses power supply due to But it cannot work normally; and in order to prevent the action of the leakage protector from affecting the work of the electric heating film, cancel the leakage protector (air switch), which does not conform to the operation rules for the installation of the electric heating film, even if the conductive layer leaks due to the reduction of insulation performance, there is no protective measure , there is a security risk;

[0004] 2. Since the leakage current is directly proportional to the frequency and voltage amplitude of the AC power supply, it is necessary to abide by the installation operation regulations and avoid excessive leakage current, which can only reduce the installation power per unit area and affect the heating effect;

[0005] 3. The generated leakage current reduces the thermal conversion efficiency of the electrothermal film and wastes electric energy;

[0006] 4. There is only an insulating layer and no shielding layer outside the conductive heating layer, and the electromagnetic field formed has a slight electric radiation to the human body; in addition, the tear resistance is also low, which affects the service life of the product

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