Circularly-heating electric water heater with thermal compensation function

Abstract

The invention discloses a circularly-heating electric water heater with a thermal compensation function. The circularly-heating electric water heater comprises a water tank, an outer circulation heating assembly and a three-way valve. The water tank is provided with a cold water inlet, an outer circulation water outlet and an outer circulation water inlet. The outer circulation water outlet, the outer circulation heating assembly, the three-way valve and the outer circulation water inlet are sequentially connected to form an outer circulation heating loop. The water inlet end of the three-way valve and the first water outlet end are connected between the outer circulation heating assembly and the outer circulation water inlet, and the second water outlet end of the three-way valve is a hot water outlet. According to the circularly-heating electric water heater, the outer circulation heating assembly is arranged outside the water tank, an outer circulation heating form is adopted, true water and electricity separation is achieved, the circularly-heating electric water heater is safer and more reliable, and maintaining of the outer circulation heating assembly is facilitated; and the outer circulation heating assembly directly drains hot water through the three-way valve, the outer circulation heating assembly can also heat water in the water tank for the second time when water is output, thermal compensation is achieved, and it is guaranteed that the temperature of outlet water meets the set requirements.

Description

technical field [0001] The invention relates to an electric water heater, in particular to a circulating heating electric water heater with thermal compensation function which can be applied to heat storage electric water heaters, solar electric water heaters and air energy electric water heaters. Background technique [0002] At present, the existing electric water heaters, especially the water storage electric water heaters, basically place the electric heating tube in the water tank, and the electric heating tube directly contacts with the water when it is working, which has extremely serious safety hazards and cannot prevent the leakage problem. According to statistics, there are about 5 / 10,000 electric leakage accidents every year, and due to the internal high temperature of the electric heating tube, a large amount of scale is generated on the surface of the electric heating tube. The scale can accelerate the aging and decline of the electric heating tube, and affect th...

AI Technical Summary

Problems solved by technology

[0002] At present, the existing electric water heaters, especially the water storage electric water heaters, basically place the electric heating tube in the water tank, and the electric heating tube directly contacts with the water when it is working, which has extremely serious safety hazards and cannot prevent the leakage problem. According to statistics, there are about 5 / 10,000 electric leakage accidents every year, and due to the internal high temperature of the electric heating tube, a large amount of scale is generated on the surface of the electric heating tube. The scale can accelerate the aging and decline of the electric heating tube, and affect the life of the electric heating tube. Ease of repair or maintenance

At the same time, the electric corrosion generated between the electric heating tube and the water tank is also likely to cause the water tank to leak.

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