| 摘要 |
<p>PURPOSE:To perform an economical operation by maximizing the operation hours of heat pump and minimizing the operation hours of heater by controlling the heating while comparing the heating characteristics curve showing the heating time relative to the combined heating capacity of the heat pump and supplemental heat source with the detected water temperature. CONSTITUTION:Water circulating between the reservoir tank 1 and water heat exchanger 5 by means of a circulation pump 4 returns to the reservoir tank after being heated in the water heat exchanger 5. At this moment, the water temperature is detected at regular time intervals by a thermo sensor 6 in the reservoir tank. Meanwhile, the relationship between the elapsed time of operation and water temperature is compared in the memory unit 10 based on the combined heating capacity of the heat pump unit 3 and heater 2, and, if the detected water temperature is low, the heater 2 is additionally operated. If the detected water temperature is high, only the heat pump is operated. While such processes are repeated, the heating of the reservoir tank 1 is completed. The control device 11 switches to the operation of the heater 2 only once the first predetermined water temperature is reached, and also controls thereafter the heating operation up tot he second water temperature at the end of the midnight time power supply.</p> |
