A water supply device with the function of recycling cold and hot water and its control method

Abstract

The invention discloses a water supply device with the function of circulating cold and hot water and a control method thereof. The device comprises a water supply pipeline and a water supply terminal. The cold water main flow pipeline is provided with a check valve, the cold water pressurized flow pipeline is provided with a water pump, a pressurized outflow three-way valve, a pressurized inflow three-way valve and a cold water pressurized normally open solenoid valve. A heating device, a hot water supply branch three-way valve and a hot water supply normally closed solenoid valve are arranged on the flow pipeline, and a return flow normally open solenoid valve and a return return three-way valve are arranged on the return branch. The remaining cold water in the hot water outlet pipeline is drained when the hot water switch is turned off, and the hot and cold water is pressurized. The invention has the advantages of water saving and energy saving, stable and reliable hot water temperature, good water use experience, wide range of water pressure adaptation, and can be used for flushing operation, which is simple and convenient and is not restricted by terrain.

Description

technical field [0001] The invention relates to cold and hot water supply technology, in particular to a water supply device with the function of recycling hot and cold water and a control method thereof. Background technique [0002] Hot and cold water supply devices are common water supply equipment in industry, hotels and households. However, the cold and hot water supply devices of the prior art generally have the following problems: 1) There is a certain length of pipeline between the heating device and the faucet. Every time when the user turns on the tap to use hot water, there is often a certain amount of residual cold water in the pipeline between the heating device and the tap. Therefore, it is necessary to drain this part of the remaining cold water first, and then the hot water can be discharged normally, so there is a serious waste of water resources caused by "cold water flowing out in vain" for many years. And in order to check when the cold water is drained...

AI Technical Summary

Problems solved by technology

However, the following problems generally exist in the hot and cold water supply devices of the prior art: 1) due to the fact that there is a certain length of pipeline between the heating device and the faucet

This part of the remaining hot water cannot be discharged and utilized in time, resulting in the phenomenon of "hot water cannot be drained" and energy waste in the form of natural gas, gas and electricity.

3) At present, the start-up of general heating devices often depends on a certain water pressure, but in some specific areas or high-rise buildings, there is often insufficient water pressure, resulting in the failure of normal use of the heating device

4) The ground and facilities of industries, hotels and households often need to be washed, and the washing operation requires a certain water pressure, and an additional pressurizing device is often required to pressurize the water, resulting in cumbersome washing operations and being pressurized The volume of the installation and the constraints of the terrain

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