HEATING SYSTEM OF HEAT PUMP USING SOLAR ENERGY AND UNDERGROUND HEAT STORAGE

摘要

The present invention relates to a heat pump heating system using solar heat and underground heat. The heat pump heating system using solar heat and underground heat comprises a solar heat collection device having a solar heat collection plate, a circulation pump, and an underground heat storage tank, and a heat pump. Heating water heated and stored in the underground heat storage tank by the solar heat collection plate and the circulation pump, and whose temperature is higher than or equal to a prescribed temperature is circulated by a different circulation pump for heating. The underground heat storage tank supplies a heat source to the heat pump, which is used as an evaporator which evaporates refrigerant gas. When the temperature of the heating water stored in the underground heat storage tank is lower than the prescribed temperature, the circulation pump is stopped, and then the heat pump using the heating water whose temperature is lower than the prescribed temperature as a heat source operates for continuous heating. Heating is basically done by the heating water heated by solar heat and stored in the underground heat storage tank, but heating can be continued by the heat pump even when the temperature of the heating water is lowered for uninterrupted heating to increase heating efficiency.