Three-dimensional heat source

Abstract

The invention provides a three-dimensional heat source with long service life and high electrothermal conversion efficiency, comprising a heating element and at least two electrodes. The heating element comprises a plurality of carbon nano-tubes distributed uniformly; the at least two electrodes are arranged at intervals and respectively and electrically connected with the heating element; the heating element is formed a hollow three-dimensional structure; and the plurality of the carbon nano-tubes in the heating element form at least one self-supporting carbon nano-tube structure. The three-dimensional heat source can be used for manufacturing factory pipelines, laboratory heating ovens or electric ovens of kitchen ware and the like.

Description

technical field [0001] The invention relates to a three-dimensional heat source, in particular to a three-dimensional heat source based on carbon nanotubes. Background technique [0002] Heat sources play an important role in people's production, life and scientific research. The three-dimensional heat source is a kind of heat source, and its characteristic is that the three-dimensional heat source has a three-dimensional structure, so that the object to be heated can be arranged inside it for heating. Since the three-dimensional heat source can heat all parts of the object to be heated at the same time, the three-dimensional heat source has the advantages of wide heating area, uniform heating and high efficiency. The three-dimensional heat source has been successfully used in industrial fields, scientific research fields or living fields, such as factory pipelines, laboratory heating furnaces or kitchen electric ovens. [0003] The basic structure of a volumetric heat sou...

AI Technical Summary

Problems solved by technology

However, the use of metal wire as a heating element has the following disadvantages: first, the surface of the metal wire is easily oxidized, resulting in an increase in local resistance and thus being blown, so the service life is short; second, the metal wire is gray body radiation, so the heat The radiation efficiency is low, the radiation distance is short, and the radiation is uneven; third, the metal wire has a high density, a large weight, and is inconvenient to use

However, the use of carbon fiber paper as the heating element has the following disadvantages: First, due to the random distribution of pitch-based carbon fibers in the carbon fiber paper, the carbon fiber paper has less strength, poor flexibility, and is easy to break, and also has the shortcoming of short life. ; Second, the electrothermal conversion efficiency of carbon fiber paper is low, which is not conducive to energy saving and environmental protection

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