| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat pump type water heater wherein reheating control taking a hot water supply load into consideration is performed to restrict inconvenience of hot water interruption for an improvement of comfortableness of use thereof. SOLUTION: A temperature lowering rate ΔT of detected hot water temperature TW is grasped, and when the temperature lowering rate is large, reference temperature Tth is set higher than in the situation when the same is small. More specifically, when the temperature lowering rate ΔT is large, a large amount of rapid hot water supply load is existent and hence starting of reheating is promoted. Further, when fresh air temperature is low, the reference temperature Tth is set higher than in the case where the fresh air temperature is high. Moreover, after hot water supply to a bath the reference temperature Tth is set high. |
