STORAGE TYPE HOT WATER SUPPLY EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To boil up hot water in a hot water storage tank efficiently by selecting heat pump heat collecting operation or solar heat collecting operation exhibiting higher operational efficiency depending on the relationship between outer air temperature and hot water temperature. SOLUTION: A compressor, a condenser and an evaporator are coupled in series while encapsulating refrigerant to constitute a heat pump heat collector. A solar heat collector is coupled in parallel with the evaporator. A solenoid valve couples any one of the evaporator or the solar heat collector selectively with the compressor and the condenser. A controller determines heat pump heat collecting operation or solar heat collecting operation exhibiting higher operational efficiency depending on the relationship between outer air temperature detected through an evaporator temperature sensor and hot water temperature detected through a hot, water temperature sensor. A region H where the operational efficiency of heat pump heat collecting operation is high, a region S where the operational efficiency of solar heat collecting operation is high, and the border line A thereof are determined experimentally and stored in the memory means of the controller.