Electric water heater capable of convert heating power automatically

Abstract

The invention provides an electric water heater capable of convert heating power automatically. The electric water heater comprises a water heater tank, electric heaters, a cold water inlet pipe, a hot water outlet pipe, a temperature sensor and a central control unit, wherein the tank is in a multi-layer structure, the water heater tank comprises four side walls and a bottom wall, four electric heaters are respectively arranged on the bottom wall and all side walls, and electric heaters are started for heating continuously and successively with the rising of the heating temperature. The electric water heater can control the heating power according to the water temperature, so that rapid thermal expansion of the tank can be prevented; and simultaneously, heaters are arranged on side walls and the bottom wall, so that the uniformity of the heating temperature can be guaranteed.

Description

technical field [0001] The invention belongs to the field of water heaters, in particular to an electric water heater with automatic heating power conversion. Background technique [0002] The heating power of the electric water heater commonly used in the family is relatively single at present, generally only has one kind of heating power, and the heating power will not change as the temperature of the water increases. Therefore, in this case, for a water heater with a relatively large heating power, once the heating is started, the temperature of the water will increase rapidly. It leads to rapid expansion of the inner tank, and multiple rapid expansions will easily lead to loosening of the combination between the inner tank and other shell materials, and will also reduce the frequency of use of the inner tank; some water heaters have low heating power, although they will heat up the water The speed is slow, thereby reducing the rapid thermal expansion of the inner tank, ...

AI Technical Summary

Problems solved by technology

[0002] At present, the heating power of electric water heaters commonly used in households is relatively single. Generally, there is only one heating power, and the heating power will not change with the increase of water temperature.

Therefore, in this case, for a water heater with a relatively large heating power, once the heating is started, the temperature of the water will increase rapidly. It leads to rapid expansion of the inner tank, and multiple rapid expansions will easily lead to loosening of the combination between the inner tank and other shell materials, and will also reduce the frequency of use of the inner tank; some water heaters have low heating power, although they will heat up the water The speed is slow, thereby reducing the rapid thermal expansion of the inner tank, but the heating speed of the overall water is slow, thus affecting the timeliness of use

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