Enamel coating heating tube and manufacture method for electric water heater

A manufacturing method and technology for electric water heaters, which are applied to water heaters, ohmic resistance heating parts, heating elements, etc., can solve the problems of destroying enamel layers, coating enamel on electric heating pipes, and damaging insulating terminal insulation materials, etc. The layer is dense, the bond is firm, and the effect of prolonging the protection time
CN100399863CActive Publication Date: 2008-07-02A O SMITH (CHINA) WATER HEATER CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
A O SMITH (CHINA) WATER HEATER CO LTD
Publication Date
2008-07-02

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Abstract

The enamel-coated heating pipe for electric water heater is shaped into bending state. The heating wire isolating from outside casing of metal pipe by insulated terminal is installed in the pipe. The insulating heat-conductance material is filled into the space between the heating wire and outside casing of metal pipe. The key point of the invention is: after the enamel paint is coated on external surface of metal pipe, the temperature of electric heating and holding time are controlled in accordance with enamel agglomeration technology.
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Description

technical field

[0001] The invention relates to a heating device for an electric water heater, and also relates to a manufacturing method of the heating device, which belongs to the technical field of household appliances. Background technique

[0002] With the continuous improvement of people's quality of life, electric water heaters have entered thousands of households and become one of the most commonly used household appliances. The heating device is usually a curved electric heating tube. The tube is equipped with a heating wire isolated from the metal tube shell through an insulating terminal. The space between the heating wire and the metal tube shell is filled with insulating heat-conducting materials such as magnesia quartz sand. Electric water heaters are very convenient to use, but the descaling and anticorrosion of electric heating devices is always a major technical problem.

[0003] In order to solve this problem, people have been trying to find new coating ma...

Claims

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