An Intelligent and Highly Effective Water Circulating System Applied in Domestic Water Heater

In daily usage of water heater, residual cold water stored in water pipe have to be emptied before hot water come out from water heater, which cause considerable waste of water, especially there exists long water pipe. Therefore, it is crucial to solve the water wastage, and of great significance to protect water resource as the demand for water is continuously increasing. This paper presented a water circulating system which can recycle the residual cold water stored in water pipe to water heater using water circulating pump, electromagnetic valve, controlling system and water circulating pipe. After cold water is heated in water heater and reach the required temperature set by user, it will run automatically to the outlet. This water circulating system can be applied to domestic water heater, which can save enormous water resource, and it has prosperous future profit prospect.