Solar water supply system based on backflow water saving technology

The invention relates to a solar water supply system suitable for modern families and hotels needing to save water. The system is specifically named as a solar water supply system based on a backflow water saving technology. The solar water supply system mainly comprises a water storage tank of a water heater, a vacuum heat collecting tube, a backflow water storage tank and a controller. The controller consists of a single-chip processor, a temperature sensor, a temperature detecting module, a flow sensor, a digital electronic valve, a switch control module, a keyboard control module, an LCD (Liquid Crystal Display) and a power supply module. By using the controller, the solar water supply system realizes the aims that water which is output by the solar water heater and does not reach theset temperature is introduced to the backflow water storage tank by a backflow valve through a backflow pipe so as to be reused, and water is saved. Furthermore, the size of the digital electronic valve is regulated by the co