Inner container of electric water heater with improved structure and its production process

Abstract

The invention discloses a liner of an electric water heater with an improved structure and a manufacturing process thereof. The liner comprises a first liner and a second liner, wherein the first liner and the second liner are communicated and connected with each other; two ends of a center circle of the first liner are provided with a first sealing end cover and a first flange end cover respectively; two ends of a center circle of the second liner are provided with a second sealing end cover and a second flange end cover respectively; the cross section of the center circle of the first liner is in a D shape; the plane in which the vertical edge of the D shape is positioned is provided with limbers; and the center circle, the second sealing end cover and the second flange end cover of the second liner are tightly contacted, matched, welded and fixed with the first liner respectively. Compared with the prior art, the manufacturing process has the advantages of improving a connection structure between the two liners, simultaneously arranging the sequence of a welding process reasonably, mixing cold and hot water evenly, eliminating potential problems of quality and security, simple procedure, less welding lines, high hot water yield, corrosion resistance, long service life, low cost, and suitability for promotion and use of the electric water heater.

Description

technical field [0001] The invention relates to an electric water heater liner and a manufacturing process thereof, belonging to the field of sanitary equipment products, in particular to an electric water heater liner with an improved structure and a manufacturing process thereof. Background technique [0002] At present, there are more and more types and styles of electric water heaters on the market, and their functions are also different. And the existing electric water heater liner can generally be divided into three classes according to different materials: the one is to add metal coating and lining plastic resin layer on the inner wall of carbon steel matrix; The inner wall of carbon steel matrix or stainless steel matrix is ​​coated with enamel material to make enamel liner. Due to the presence of chloride ions in the water, the first two inner tanks are prone to corrosion under the action of high-temperature chloride-ion-containing water for a long time. The advan...

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Problems solved by technology

Nowadays, one of the commonly used serial connection methods is to use several connecting pipes between two small cylindrical inner tanks and fix them by welding. The welding process of this structure is complicated, and the operability of the production process is relatively difficult. If the connecting pipe is uneven, there will still be problems such as uneven enamel layer and lack of porcelain on the connecting pipe, which may lead to corrosion of the carbon steel inner tank; For the side flange, the two inner tanks are enamelled and then the flanges are butt-jointed, and the flanges are welded and fixed on the outside. This structure is also difficult to weld and has many welds. Moreover, welding after enamelling is also easy to damage the enamel at the joint. Layer, resulting in the possibility of no porcelain area in the inner tank, leaving a quality hidden danger of inner tank corrosion

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