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Plane heat source

A heat source and heating element technology, which is applied in the field of surface heat source based on carbon nanotubes, can solve the problems of insufficient thermal response speed of thermoelectric materials, insufficient heating temperature of electrothermal materials, and inability to form carbon nanotube structures, etc., to achieve electrothermal conversion efficiency High, good heating performance, small thermal hysteresis effect

Active Publication Date: 2013-06-05
TSINGHUA UNIV +1
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Problems solved by technology

[0006] Moreover, after the above-mentioned dispersion treatment of the carbon nanotubes, even if the carbon nanotubes can contact each other, the binding force is weak, and a self-supporting carbon nanotube structure cannot be formed.
Due to the low content of carbon nanotubes, the thermal response speed of thermoelectric materials is not fast enough, and the electrothermal conversion efficiency is not high enough, so the heating temperature of this electrothermal material is not high enough, which limits its application range.
In addition, in order to disperse carbon nanotubes in the liquid phase, when preparing electrothermal materials, the flexible matrix can only choose polymer materials, and the heat-resistant temperature of polymer materials is low. Material approach limits choice of substrate material

Method used

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preparation example Construction

[0072] see Figure 18 , the embodiment of the present invention provides a method for preparing a surface heat source 10, which includes the following steps:

[0073] In step 1, a carbon nanotube structure 164 is provided, and the carbon nanotube structure 164 includes a plurality of pores.

[0074] According to the difference of the carbon nanotube structure 164, the preparation method of the carbon nanotube structure 164 includes: a direct film drawing method, a rolling method, a flocculation method and the like. In this embodiment, the carbon nanotube structure 164 can be a one-dimensional structure or a two-dimensional structure. The preparation methods of the above-mentioned several carbon nanotube structures 164 will be described separately below.

[0075] (1) When the carbon nanotube structure 164 includes at least one carbon nanotube drawn film, the preparation method of the carbon nanotube structure 164 specifically includes the following steps:

[0076] Firstly, a...

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Abstract

The invention relates to a plane heat source, comprising a heating element and at least two electrodes which are arranged at intervals and electrically connected with the heating element, wherein the heating element is composed of a substrate and an integrated self-supporting carbon nano tube structure formed by a plurality of carbon nano tubes. The plane heat source can be used for producing self-heating clothes, gloves or shoes, electric heaters, infrared therapy apparatuses, electric radiators and the like and has wide application range.

Description

technical field [0001] The invention relates to a surface heat source, in particular to a surface heat source based on carbon nanotubes. Background technique [0002] Heat sources play an important role in people's production, life and scientific research. A surface heat source is a type of heat source. The surface heat source is a two-dimensional structure, and the object to be heated is placed above the two-dimensional structure to heat the object. Therefore, the surface heat source can heat all parts of the object to be heated at the same time, with a large heating surface, uniform heating and high efficiency. Surface heat sources have been successfully used in industrial fields, scientific research fields, or living fields, such as electric heaters, electric blankets, infrared therapeutic devices, and electric heaters. [0003] The existing surface heat source generally includes a heating element and at least two electrodes, the at least two electrodes are arranged on ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B82B1/00
Inventor 冯辰刘锴王佳平姜开利刘长洪范守善
Owner TSINGHUA UNIV
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