Dual-insulation high-efficiency safety electric water heater

An electric water heater, high-efficiency technology, used in water heaters, fluid heaters, lighting and heating equipment, etc., can solve the problems of complex process, bursting of the pipe wall, can not be well satisfied, etc., to achieve the effect of not easy to damage

Active Publication Date: 2006-07-19
A O SMITH CHINA WATER HEATER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Yet, through in-depth and meticulous research, the applicant finds that the double insulation structure of the existing electric heater all has deficiencies.
[0004] For example, the utility model patent with the application number CN94218994.9 discloses a structure that fills between the heating element and the shell as an additional insulating heat transfer medium, so that the heater has a double insulation function. The inner tank will occupy a large space, and from the technical point of view, it is difficult to ensure that the filling is dense due to the inability to reduce the diameter, and if the filling material contains air, it is easy to cause the tube wall to burst during use
The double-insulated electric heater disclosed in CN97224405.0 covers a layer of continuous and uniform inorganic adhesive film on the outer surface of the ordinary metal electric heating tube, and then encapsulates it in the metal jacket without gaps, thereby forming a gap between the live parts and the outer metal sheath. Double leakage protection, this patent overcomes the shortcomi

Method used

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  • Dual-insulation high-efficiency safety electric water heater

Examples

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Embodiment 1

[0024] The double-insulated high-efficiency and safe electric water heater of this embodiment is a preferred example, and is mainly composed of a control circuit on the casing, a water storage liner placed in the shell, and a U-shaped electric heating tube installed in the liner. Except for the electric heating device, other parts are the same as the existing electric water heater, which is practical.

[0025] Electric heating devices such as figure 1 , 2 As shown, the basic structure of the electric heating tube 1 is the same as that of the ordinary electric heating tube. The outer tube 3 is equipped with a resistance wire 2, and the space between the outer tube and the resistance wire is filled with insulating powder 4 such as magnesium oxide after shrinkage. Different from ordinary electric heating tubes, the section of the heating section of the U-shaped electric heating tube 1 in this embodiment is as follows: figure 2 As shown, it consists of two pairs of electric hea...

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PUM

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Abstract

The invention relates to a dual-insulation high-efficiency safety electric water heater, belonging to the household apparatus. It comprises a water storage inner container inside the case; a bended electric heating tube inside the inner container; and a control circuit connecting the electric heating tube. Wherein, said electric heating tube is inserted in the heat conductive insulation sheath whose inner space matches the shape of electric heating tube; said heat conductive insulation sheath is through the metallic mounting end cap to be inserted into the metallic support tube whose shape matches the shape of said sheath; the end of said metallic support tube is sealed and welded with the metallic mounting end cap; and the outer screw of mounting end cap is sealed and screwed with the inner screw of the mounting hole of inner container. Compared to present technique, the invention can avoid change the former structure of water heater with lower cost, and it can form dual insulation outside the electric heating tube and at the connection with the inner container to avoid the electric leakage.

Description

technical field [0001] The invention relates to an electric water heater, in particular to an electric water heater whose safety is ensured by improving an insulating structure, and belongs to the technical field of household appliances. Background technique [0002] Electric water heaters are easy to use and significantly improve the quality of life, so they are widely used. The existing electric water heater is mainly composed of a control circuit on the housing, a water storage liner arranged in the shell, and an electric heating device installed in the liner. In order to facilitate installation and reduce its own power density, U-shaped electric heaters are commonly used in existing electric water heaters. [0003] In order to prevent leakage and ensure safe use, in addition to taking measures such as shell grounding and adding anti-electricity drainage tubes, designers mainly focus on the root cause of leakage-electric heating and propose various safety measures for se...

Claims

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Application Information

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IPC IPC(8): F24H1/20F24H9/20
Inventor 丁威邱步万华新鞠平张庆新
Owner A O SMITH CHINA WATER HEATER CO LTD
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