Safe electric heater provided with insulating sleeve for scale inhibition of heat exchange surface through guide circulation electric insulating

Abstract

The invention provides a safe electric heater provided with an insulating sleeve for scale inhibition of a heat exchange surface through guide circulation electric insulating. A heat release surface of the electric heater is an electric insulating material face, so that the binding force of calcium and magnesium ions to the heat release surface, and hard incrustation is not easily formed; the bottom end of the electric heater of which the heat release surface is the electric insulating material face is arranged on a mounting and fixing base; an electric insulating guide assembly is formed by insulating guide sleeves which are sleeved concentrically from inside to outside; the upper end of the inner insulating guide tube is a water outlet port and arranged under the water surface of the topof the water heater; water enters from the upper end pipe orifice of the outer insulating guide sleeve, passes through a throttling device formed between the pipe orifice of the bottom of the inner insulating guide tube and the mounting and fixing base, enters a hot water cavity of the electric heater of which the heat release surface is the electric insulating material surface, and the water heated by the electric heater is discharged from the upper end pipe orifice of the inner insulating guide tube; the temperature of the water entering an electric insulating guiedvane is increased rapidlyafter being heated by the water heater, thereby achieving the instant hot requirements, the production cost is low, processing is easy, the performance is excellent, and the safe electric heater represents the development direction of the water heater application in the future.

Description

technical field [0001] The invention relates to the field of electric heating, in particular to a safe electric heater provided with an insulating sleeve for diversion circulation, electric insulation, and scale prevention on a heat release surface. Background technique [0002] The existing electric heater generally adopts the form of electric heating wire filled with magnesium oxide powder in the metal tube. Because the metal tube conducts electricity, the surface of the metal tube will be scaled, resulting in poor heat transfer effect, which will cause the temperature of the metal electric heating tube to be too high, which will easily cause metal Corrosion of the tubes shortens the service life. Although quartz glass electric heaters are not easy to scale, because the heat dissipation area and power density of a single tube need to be matched, high-power tubes often need to be made larger in order to meet the demand for power, and if the volume is too large, it will affe...

AI Technical Summary

Problems solved by technology

[0002] Existing electric heaters generally adopt the form of electric heating wire filled with magnesium oxide powder in the metal tube. Because the metal tube conducts electricity, the surface of the metal tube will be scaled, resulting in poor heat transfer effect, resulting in excessive temperature of the metal electric heating tube, which easily causes metal Tube corrosion, shortened service life

Although quartz glass electric heaters are not easy to scale, because the heat dissipation area and power density of a single tube need to be matched, high-power tubes often need to be made larger in order to meet the demand for power, and if the volume is too large, it will affect the strength. , installation space, safety, cost and other aspects cause a lot of inconvenience, and power regulation is difficult

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