Combined-type electric water heater

Abstract

The invention relates to a combined-type electric water heater. The water heater comprises a water storage tank with a temperature sensor therein, and the water storage tank is provided with an inletpipe and an outlet pipe; the inlet pipe is provided with a water level controller, and the outlet pipe is sequentially provided with a water pump, an electric heater unit and a three-way valve; a second valve port of the three-way valve is connected with a normal-closed solenoid valve which is connected with the water storage tank by a return pipe, and a third valve port of the three-way valve isconnected with a faucet at a user side. The water heater product has advantages of small size, low power, high heating speed, heavy waterflow and low cost of the water storage tank and is suitable forlow water pressure environment.

Description

technical field [0001] The invention relates to an electric water heater, in particular to a composite electric water heater. Background technique [0002] Traditional electric water heaters mainly include storage electric water heaters and instant electric water heaters. The storage type electric water heater mainly installs the electric heating tube in the large-capacity metal water storage tank. When working, the water in the water tank is heated to the set temperature (usually between 75°C and 80°C). When the user turns on the tap, The hot water is released through the hot water pipe and mixed with the cold water from the tap water pipe to adjust the appropriate water temperature for use. The advantage of this kind of water heater is that the water volume is large and the working current is small. But it also has obvious disadvantages. Firstly, it is bulky and takes up a lot of space, so it can only be installed outside the bathroom; secondly, because the water tempera...

AI Technical Summary

Problems solved by technology

[0004] Regardless of whether it is a storage electric water heater or an instant electric water heater, due to the high water temperature of the water storage tank during operation, the water storage tank is made of a metal pressure vessel, and insulation measures are required, resulting in higher product costs.

In addition, traditional water heaters must be equipped with hot and cold faucets when they are used. The high-temperature hot water in the storage tank is used to mix with the normal temperature water in the tap water pipe. However, the water pressure in the tap water pipe is usually high, which will lead to unstable hot water output. , bringing discomfort to users, especially in some areas with low water supply pressure, this phenomenon is especially obvious

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