Water tank of heat-pump water heater

Abstract

The invention discloses a water tank of a heat-pump water heater. The water tank of the heat-pump water heater comprises a liner, a heating pipe and an isolating medium layer, wherein an accommodating cavity is formed in the liner; the heating pipe coils on the outer surface of the liner; the isolating medium layer is arranged between the heating pipe and the liner and used for electrical isolation of the heating pipe and the liner. According to the water tank of the heat-pump water heater, direct contact of the heating pipe with the liner is avoided, potential corrosion between the heating pipe and the liner is prevented effectively, corrosion perforation of the liner or the heating pipe is avoided, water leakage of the liner or leakage of a refrigerant in the heating pipe due to potential corrosion is prevented effectively, the service life of the water tank is prolonged, and the safety of the water tank is improved.

Description

technical field [0001] The invention relates to the field of household appliances, in particular to a water tank of a heat pump water heater. Background technique [0002] Heat-exchange copper tubes are wound on the inner and outer walls of the fluorine circulating water tank of heat pump water heaters. However, with the rising cost pressure, various manufacturers are looking for alternative materials for copper tubes. Aluminum tubing is a great option. The thermal conductivity of the aluminum tube is lower than that of the copper tube, and the cost is only 1 / 3 of the copper tube, which has a great cost advantage. [0003] At present, the aluminum coil water tanks on the market are directly coiled on the outer wall of the inner tank. The material of the inner tank is mainly steel plate, and the material of the aluminum tube is aluminum alloy. The two different metals are in direct contact. There is a potential difference between them, thus forming an anode and a cathode, r...

AI Technical Summary

Problems solved by technology

[0003] At present, the aluminum coil water tanks on the market are directly coiled on the outer wall of the inner tank. The material of the inner tank is mainly steel plate, and the material of the aluminum tube is aluminum alloy. The two different metals are in direct contact. There is a potential difference between them, thus forming an anode and a cathode, resulting in potential corrosion

In addition, when the water tank is used in different environments, external air and water will inevitably enter the foam layer of the water tank, and the aluminum tube of the outer disk will be exposed to high temperature and humidity for a long time, which will greatly accelerate the corrosion reaction and cause the aluminum tube to perforate Fluorine leakage, or inner tank corrosion and water leakage

Once the water tank leaks water and fluorine, it cannot be repaired and can only be replaced as a whole. If the water tank leaks seriously, it may damage the decoration of the user's home and bring greater losses to the user's economy.

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