Linear heat source

Abstract

The invention discloses a linear heat source, which comprises a linear substrate, a heating layer arranged on the surface of the linear substrate, and two electrodes arranged on the surface of the heating layer at intervals, wherein the two electrodes and the heating layer are electrically connected respectively; the heating layer comprises a carbon nanotube layer; and the carbon nanotube layer comprises a plurality of carbon nanotubes which are intertwined and disorderly arranged.

Description

technical field [0001] The invention relates to a line heat source, in particular to a line heat source based on carbon nanotubes. Background technique [0002] Heat sources play an important role in people's production, life and scientific research. The wire heat source is one of the commonly used heat sources, and is widely used in electric heaters, infrared therapeutic devices, electric heaters and other fields. [0003] See figure 1 , the prior art provides a wire heat source 10, which includes a hollow cylindrical support 102; a heating layer 104 is arranged on the surface of the support 102, and an insulating protective layer 106 is arranged on the surface of the heating layer 104; two electrodes 110 are respectively arranged It is located at both ends of the bracket 102 and is electrically connected to the heating layer 104 ; two clamping parts 108 fix the two electrodes 110 and the heating layer 101 on the two ends of the bracket 102 respectively. Wherein, the hea...

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Problems solved by technology

[0004] However, the use of carbon fiber paper as the heating layer has the following disadvantages: First, the thickness of carbon fiber paper is relatively large, generally tens of microns, which makes it difficult for the linear heat source to be made into a microstructure, and cannot be applied to the heating of micro devices.

Second, because the carbon fiber paper contains the paper substrate, the carbon fiber paper has a high density and a large weight, which makes it inconvenient to use the linear heat source of the carbon fiber paper

Third, due to the random distribution of pitch-based carbon fibers in the carbon fiber paper, the carbon fiber paper has low strength, poor flexibility, and is easy to break, which limits its scope.

Fourth, the electrothermal conversion efficiency of carbon fiber paper is low, which is not conducive to energy saving and environmental protection

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