Multifunctional control valve

Abstract

A multifunctional control valve comprises a valve body, a valve ball, a rotating shaft and a pressure sensor. A valve water inlet and a valve water outlet are formed in the valve body and can be communicated with a horizontal channel of the valve ball, and therefore cold water is injected to a water heater when water pressure is low. A notch is further formed in the valve ball, so that a pressure relief channel is formed between the valve ball and the valve body, and the pressure relief channel is communicated with the valve water outlet and an overflow opening. The valve ball can be driven by the rotating shaft to rotate forwards by 90 degrees and rotate reversely by 90 degrees, so that conversion of water flowing and stopping is achieved, and pressure of the water heater is adjusted. The pressure sensor is arranged at the valve water outlet and connected with a controller through a wire, and the controller controls a motor to act according to pressure values detected by the pressure sensor. Automatic closing can be achieved when the detected pressure value exceeds a set working pressure value, automatic pressure relief can be carried out when the pressure value exceeds a set pressure relief value, the water heater is maintained to work at a low water pressure state, the service life of the water heater can be prolonged, and stability of water outlet temperature is guaranteed.

Description

technical field [0001] The invention relates to the technical field of fluid control valves, in particular to a multifunctional control valve for keeping a water storage water heater working in a low water pressure state and having an overpressure protection function. Background technique [0002] At present, there are two common structural types of domestic water storage water heaters, one is a closed structure, and the other is an open water outlet structure. [0003] A storage water heater with a closed structure. The advantages are: the pressure of the cold water inlet and the hot water inlet of the mixing valve are equal, the water temperature after mixing is constant, and is basically not affected by the change of the water source pressure. The disadvantage is that the water storage container of the water heater works under high pressure for a long time, which will greatly reduce the water storage. The service life of the container. [0004] The water storage water h...

AI Technical Summary

Problems solved by technology

The advantages are: the pressure of the cold water inlet and the hot water inlet of the mixing valve are equal, the water temperature after mixing is constant, and is basically not affected by the change of the water source pressure. The disadvantage is that the water storage container of the water heater works under high pressure for a long time, which will greatly reduce the water storage. Service life of the container

[0004] The water storage water heater with an open water outlet structure, the hot water outlet of the water storage container (liner) is connected to the atmosphere, the advantage is: the water storage container of the water heater is in a pressure-free state, and the inner tank has a long service life; the disadvantage is: the outlet of the mixing valve The water temperature is unstable with the change of water source pressure. At the same time, when the mixing valve is closed, a small stream of hot water will flow out, which is easy to scald people. At present, only a few manufacturers use water heaters with an open water storage structure.

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