CLOSED TYPE FORCIBLE CIRCULATION SOLAR HEAT WATER HEATER

摘要

PROBLEM TO BE SOLVED: To provide a forcible circulation water heater system of a closed circuit capable of being driven only by a solar cell without a commercial power supply, which is safe without an idle operation of a DC power supply circulation pump, while synchronizing a solar heat absorbing property, ON/OFF of a forcible circulation pump, and a circulation speed of heat medium.SOLUTION: The solar heat water heater system has a closed type heat medium circulation circuit having a DC power supply circulation pump, an expansion tank, and a pressure releasing valve in the middle of piping coupling a heat exchanger arranged in a hot water storage tank and a solar heat collector, and is characterized in that wiring going out from a PC plate in which the solar cell of light receiving area of 0.4 m, a temperature sensor of the solar heat collector, the temperature sensor of the hot water storage tank, and a heat medium detecting sensor are wired are wired to the DC power supply circulation pump.