Electric heating device

Abstract

The invention discloses a safe and rapid electric heating device, comprising a heat conduction pipe and an electric heating wire. The electric heating wire is spirally wound on the outer wall of the heat conduction pipe; the heat conduction pipe is an aluminum alloy pipe; a layer of a sulfuric acid anode oxide film is arranged on the surface of the outer wall of the aluminum alloy pipe; and the electric heating wire and the surface of the outer wall of the aluminum alloy pipe are in direct contact. The electric heating device provided by the invention has the advantages in that the electric heating wire can heat the aluminum alloy pipe through direct contact through the layer of the sulfuric acid anode oxide film arranged on the surface of the outer wall of the aluminum alloy pipe, so that the heating speed of the electric heating device can be effectively improved, and the use security of the electric heating device can be ensured.

Description

technical field [0001] The invention relates to an electric heating device. Background technique [0002] A known electric heating device, its heating principle is to conduct the heat generated by the high-temperature resistance wire to the heat-conducting tube after electrification, and heat the material in the heat-conducting tube. It is widely used in many occasions due to its convenient use and no pollution. The existing electric heating device includes a heat pipe and an electric heating wire. The heat pipe is usually made of a copper pipe, and the outer wall of the copper pipe is provided with an insulating layer. The electric heating wire is spirally wound on the outer wall of the copper pipe and contacts the insulating layer. Copper has the characteristics of good thermal conductivity and strong ductility, but it is expensive to use in large quantities; the insulating layer is mostly composed of crystalline magnesium oxide powder with high temperature resistance and ...

AI Technical Summary

Problems solved by technology

Copper has the characteristics of good thermal conductivity and strong ductility, but it is expensive to use in large quantities; the insulating layer is mostly composed of crystalline magnesium oxide powder with high temperature resistance and good insulation performance, but the thermal conductivity is low, and the material in the heat pipe cannot rapid heating

And after the heat pipe is used for a period of time, the insulating layer on the surface is easy to age and fall off, which brings safety hazards to the use

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