Annular electrothermal film capable of avoiding film burning

Abstract

The invention belongs to the technical field of heating materials, and relates to an annular electrothermal film capable of avoiding film burning. The annular electrothermal film is provided with an open-loop main electrode approximate to be annular and wire welding points connected to the head and the tail of the main electrode; and a plurality of sections of heating areas connected with the electrothermal film are connected to the main electrode in series. On the basis of keeping the stability and reliability of a series circuit, the annular layout design is adopted,contact is better and more stable for circular and concave bottom containers, the problem of film burning is not easy to occur, the heating requirements in most occasions are better met, and the material waste and the money loss caused by film burning damage are reduced.

Description

technical field [0001] The invention belongs to the technical field of heating materials, and in particular relates to an annular electric heating film which can avoid film burning. Background technique [0002] The electric heating film is a light and thin planar resistance heating element structure with high energy density. Compared with the traditional resistance heating wire, it is small in size, light in weight, energy-saving and environmentally friendly, and can be applied to more fields and products. . Considering the difficulty of routing and the stability of the overall structure, the current common electrothermal film is a square sheet structure, and the circuit layout is mainly connected in series, so that the circuit will be less prone to regional short circuit and ablation problems . [0003] However, for the vast majority of containers with round bottoms, square membranes are likely to cause poor contact. The problem of wiring layout will cause the energy to...

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Problems solved by technology

Considering the difficulty of routing and the stability of the overall structure, the current common electrothermal film is a square sheet structure, and the circuit layout is mainly connected in series, so that the circuit will be less prone to regional short circuit and ablation problems

[0003] However, for the vast majority of containers with round bottoms, square membranes are likely to cause poor contact. The problem of wiring layout will cause the energy to be unable to be transmitted quickly due to its own defects, which may eventually lead to power attenuation or even burning of the film layer, resulting in a waste of money and materials

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