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Automatic temperature control electric heating film, and preparation method and application thereof

An electric heating film and self-temperature control technology, which is applied in the direction of ohmic resistance heating, ohmic resistance heating parts, heating elements, etc., can solve the problems of covering burning, fire, local high temperature, etc.

Pending Publication Date: 2021-05-07
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The insulating matrix is ​​generally a structural layer composed of glass fiber composite layer or polyether ether ketone and other polymer materials. The sprayed electric heating film coating is a metal coating. When energized and heated, if there is a partial covering, it is easy to cause local heat. Accumulation leads to excessive local temperature. The accumulation of this heat will damage the electric heating film, and more seriously, it will cause the covering to burn and cause a fire accident, and then the anti-deicing effect cannot be achieved.

Method used

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  • Automatic temperature control electric heating film, and preparation method and application thereof
  • Automatic temperature control electric heating film, and preparation method and application thereof
  • Automatic temperature control electric heating film, and preparation method and application thereof

Examples

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preparation example Construction

[0058] In the present invention, the preparation method of the self-temperature-controlled electric heating film preferably includes the following steps:

[0059] Mix the insulating polymer, heat-insulating functional nanoparticles / heat-conducting functional nanoparticles and organic solvents, spray on the substrate, and dry to obtain an insulating isolation layer;

[0060] Arranging interdigitated electrodes on the insulating isolation layer;

[0061] Dissolving nano conductive fillers, positive temperature coefficient thermosensitive fillers, polymers and residual phase change materials in an organic solvent, then spraying the sub-electrodes covering the interdigitated electrodes, and obtaining a positive temperature coefficient coating after drying;

[0062] The insulating polymer, heat-insulating functional nanoparticles / heat-conducting functional nanoparticles and an organic solvent are mixed and then sprayed to cover the main electrode and part of the positive temperatur...

Embodiment 1

[0082] The schematic cross-sectional view of the structure of the self-temperature-controlled electric heating film provided in this embodiment is as follows: figure 1 As shown in the figure, 1 is an insulating isolation layer, 2 is an interdigital electrode, 3 is a positive temperature coefficient coating, and 4 is an insulating protective layer;

[0083] The arrangement of the interdigitated electrodes provided in this embodiment on the insulating isolation layer is as follows: image 3 As shown in the figure, 1 is an insulating isolation layer, 2a is the main electrode of the interdigitated electrode, and 2b is the secondary electrode of the interdigitated electrode;

[0084] Such as figure 1 with 3 As shown, the self-temperature-control electric heating film consists of an insulating isolation layer 1, an interdigital electrode 2 arranged on the surface of the insulating isolation layer 1, and a positive temperature coefficient coating covering the surface of the seconda...

Embodiment 2

[0088] The schematic cross-sectional view of the structure of the self-temperature-controlled electric heating film provided in this embodiment is as follows: figure 1 As shown in the figure, 1 is an insulating isolation layer, 2 is an interdigital electrode, 3 is a positive temperature coefficient coating, and 4 is an insulating protective layer;

[0089] The schematic diagram of the top view structure of the self-controlling electric heating film provided in this embodiment is as follows figure 2 As shown in the figure, 2a is the main electrode of the interdigital electrode, 2b is the secondary electrode of the interdigital electrode, 3 is the positive temperature coefficient coating, and 4 is the insulating protective layer;

[0090] Such as figure 1 with 2 As shown, the self-temperature control electric heating film of the present embodiment 2 is composed of an insulating isolation layer 1, an interdigital electrode 2 arranged on the surface of the insulating isolation ...

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Abstract

The invention provides an automatic temperature control electric heating film. The automatic temperature control electric heating film comprises an insulation isolation layer, an interdigital electrode arranged on the surface of the insulation isolation layer, a positive temperature coefficient coating covering the surface of an auxiliary electrode of the interdigital electrode, and an insulation protection layer covering the surface of a main electrode of the interdigital electrode. The positive temperature coefficient coating is not in contact with the main electrode of the interdigital electrode; and the insulation protection layer is in lap joint with the positive temperature coefficient coating. According to the electric heating film provided by the invention, when external voltage is applied, electric energy is transmitted to the positive temperature coefficient (PTC) coating through the interdigital electrodes, and by utilizing the PTC effect, after the coating is heated to a certain temperature, the coating can automatically limit the temperature due to the fact that the heating power is reduced because the resistance is increased, so that automatic temperature control is realized, and the purpose of preventing and removing ice is achieved. The result of the embodiment shows that when the electrical resistivity of the electric heating film is 0.01 omega.m, the PTC effect can reach 25 times or above, and the automatic temperature control effect and the liquid drop slippage performance are good.

Description

technical field [0001] The invention belongs to the technical field of electric heating film, and in particular relates to a self-controlling electric heating film and its preparation method and application. Background technique [0002] Electric heating film has been widely used in many fields, such as heat preservation and heating of equipment or space, anti-icing and deicing of aircraft and other equipment surfaces. The principle of the electric heating film is based on Joule's law. By applying a certain voltage to achieve electrothermal heating, the "solid-solid" contact between the aircraft surface and the ice can be transformed into a "solid-liquid" contact, thereby reducing the surface ice adhesion. , to achieve anti-deicing effect. The current electric heating film is mainly to spray the electric heating film coating on the surface of the insulating substrate to form an integrated structural and functional part. The insulating matrix is ​​generally a structural lay...

Claims

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Application Information

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IPC IPC(8): H05B3/02H05B3/03H05B3/20H05B3/14
CPCH05B3/02H05B3/03H05B3/20H05B3/145H05B2214/02H05B2203/02H05B2214/04H05B3/26H01C1/1406H01C7/02H05B1/0294H05B3/06H05B3/86H05B2203/013H05B2203/035
Inventor 陈华伟朱彦曈王泽林澜刘晓林赵泽辉陈济琛
Owner BEIHANG UNIV