Hot water storage type heat pump water heater

摘要

PROBLEM TO BE SOLVED: To provide a hot water storage type heat pump hot water supply device which determines change of a boiling target temperature depending on presence/absence of an additional heating operation result and presence/absence of bathtub water at boiling operation start time.SOLUTION: When boiling operation start time has come in a state where an additional heating operation result is present, and bathtub water is determined to be absent by confirming presence/absence of the bathtub water in a bathtub 31, it is estimated that possibility is low that the additional heating operation is executed on the day when the boiling operation in a hot water storage tank 2 is executed, and a boiling target temperature is lowered. Thus, as hot water with excessively high temperature is not stored in the hot water storage tank 2, deterioration of boiling efficiency can be prevented, and energy can be saved by decreasing a power use amount during the boiling operation.