Bi-directional conduction electric-heating tube

Abstract

A bi-directional conduction electric-heating tube comprises a metal outer tube, a metal inner tube, filler, a heating wire and a guide bar. The heating wire with the guide bar is disposed between the metal outer tube and the metal inner tube. The heating wire is fixed between the metal outer tube and the metal inner tube through the filler. The bi-directional conduction electric-heating tube has the advantages that electric heating efficiency is improved, and radiating area is also enlarged.

Description

technical field [0001] The invention relates to the field of electric heating, in particular to a bidirectional heat conduction electric heating tube. Background technique [0002] Metal electric heating tube is currently the most used energy conversion device for small household appliances in the world, that is, it completes the conversion of electric energy to thermal energy. Although a huge leap has taken place in the electric heating industry from quantity to quality since the 1990s, this The use of class components still has the following unsatisfactory conditions: [0003] 1. Affected by the thermal resistance characteristics of the filling material, the electric heating efficiency of the electric heating tube has never been able to meet the ideal requirements. Such products are very passive in the overall environment of a low-carbon society and environmental protection. [0004] 2. Since the thermal conductivity of the filling material has certain limitations, it can...

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Problems solved by technology

[0003] 1. Affected by the thermal resistance characteristics of the filling material, the electric heating efficiency of the electric heating tube has never been able to meet the ideal requirements. Such products are very passive in the overall environment of low-carbon society and environmental protection.

[0004] 2. Since the thermal conductivity of the filling material has certain limitations, it cannot bear the need of high heat transfer in the state of high power density, so the structural design of the electric heating element cannot meet the overall development requirements of high power and small volume. Machine design can not be more optimized and more economical to carry out new development

[0005] 3. In magnesia (including all kinds of fused and modified magnesia), which is the most widely used filling material at present, due to the existence of many impurities such as Fe 2 o 3 , SiO 2 , CaO, Al 2 o 3 etc., the features they show at high temperature have great unreliability and stability to the thermal conductivity of the electric heating tube or the safety and leakage prevention factors, so the pass rate in the working process of the components, including the manufacturing process, is hidden. risks of

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