Segmented Jacketed Water Tank

Abstract

A sectional jacket water tank comprises an inner container (3) and a jacket welded on the outer surface of the inner container (3). An enamel layer is arranged on the inner surface of the inner container (3). The jacket is composed of a first sleeve (1) and a second sleeve (2). One side of the first sleeve (1) and one side of the second sleeve (2) are respectively welded on the inner container (3), the enamel layer is sintered, and the other side of first sleeve (1) and the other side of the second sleeve (2) are welded. When the enamel layer is sintered, a jacket layer is in the opening state so that axial stress generated when the jacket is heated and expanded during enamel sintering is released on the opening side of the jacket layer, and powder falling or chipping of the enamel layer of the jacket water tank caused by stress concentration is avoided.

Description

technical field [0001] The invention belongs to the field of water heaters, and in particular relates to a segmented jacketed water tank applied to water storage water heaters such as electric water heaters, heat pump water heaters, and solar water heaters. Background technique [0002] In the prior art, jacketed water tanks generally first weld the jacket on the outer surface of the inner tank, and then sinter the enamel layer in the inner tank. However, there is stress at the weld between the jacket and the outer surface of the inner tank. At the same time, during the sintering process of the enamel layer, because the jacket is on the outside, it first expands when heated to generate axial stress, which intensifies the tension between the jacket and the outer surface of the inner tank. The stress concentration at the welding part of the jacketed water tank will eventually lead to undesirable phenomena such as powder falling or porcelain explosion on the enamel layer of the...

AI Technical Summary

Problems solved by technology

However, there is stress at the weld between the jacket and the outer surface of the inner tank. At the same time, during the sintering process of the enamel layer, because the jacket is on the outside, it first expands when heated to generate axial stress, which intensifies the tension between the jacket and the outer surface of the inner tank. The stress concentration at the welding part of the jacketed water tank will eventually lead to the occurrence of undesirable phenomena such as powder falling or porcelain explosion on the enamel layer of the jacketed water tank due to excessive stress concentration.

Although the stress can be eliminated or reduced by various methods such as high-temperature heating and beating, this will undoubtedly increase the processing cost of the jacketed water tank

Images