An infrared electric heating tube and its water heater

Abstract

The invention relates to an infrared electric heating tube which comprises a ceramic core tube, heat insulation ceramic fiber paper covering the outer wall of the ceramic core tube and a coiled electric heating wire. The ceramic core tube, the heat insulation ceramic fiber paper and the coiled electric heating wire are all packaged in a glass tube. An electrode and an electrode seat are arranged on a port of the glass tube, a layer of infrared heat conduction coating is poured on the inner wall of the transparent glass tube, the infrared heat conduction coating is formed by blending of silicon carbide and water-soluble sodium silicate with the concentration being 50%, and the weight ratio of the silicon carbide and the sodium silicate is 3:1. The electric heating wire is coiled on the heat insulation ceramic fiber paper coated with the infrared heat conduction coating, the gap between the electric heating wire and the glass tube is filled with the powder compound of silicon carbide, silicon oxide and rare earth oxide, and the mixing ratio of the silicon carbide, the silicon oxide and the rare earth oxide is 3:2:1. According to the design, infrared thermal radiation is used for heating, the advantages of being high in thermal efficiency, high in heating speed, long in service life and the like are achieved, water can be better activated, and the infrared electric heating tube is particularly suitable for the industries of bathroom water heaters, drinking water boiler and the like.

Description

technical field [0001] The invention relates to the technical field of electric heating elements, in particular to electric heating pipes for water heating and water heaters thereof. Background technique [0002] At present, with the rapid development of the economy and the increasing number of industrial enterprises, the waste gas and waste water produced seriously affect our quality of life. The heat is first transferred to the metal tube through magnesium oxide, and then transferred to the water to be heated by the metal tube. This heating method is carried out by using the heat transfer method of the medium. When heating water, the heating temperature rises slowly. A lot of power. [0003] China Patent No.: 201120355870.2, the utility model patent titled: "A Quick Infrared Heating Tube" has improved this, the core of its technology is: "The ceramic tube is used as the core tube, and its outer wall is covered with heat-insulating ceramic fiber paper , the ceramic fiber...

AI Technical Summary

Problems solved by technology

This technology can effectively improve the thermal efficiency of water heating, but the heating tube of this technology is designed to be densely filled with solid fillers between the glass tube and the heating wire. Due to the effect of thermal expansion and contraction, in practical applications, the glass tube will It is easy to crack and burst, causing the heating tube to fail

On the other hand, because the material of the glass tube itself is generally not easy for infrared rays to pass through, infrared rays cannot easily penetrate the glass tube, and the radiation flux of infrared rays to the outside is small, resulting in low heating efficiency and the temperature rise of the water to be heated. Slow, but the heat energy will accumulate in the glass tube, sometimes the temperature is too high and it is easy to burn the heating wire

Furthermore, the radiation flux of infrared rays to the outside is small, and the speed of heating water and the conversion efficiency of negative ions in water are low.

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