| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat pump type water heater capable of effectively suppressing decline in heating capacity and a coefficient of performance even when a water inflow temperature is increased, in the heat pump type water heater in which refrigerant pressure on the high pressure side is set to exceed critical pressure. <P>SOLUTION: A control part 33 performs control to increase a hot water delivery temperature from a first hot water delivery temperature to a second hot water delivery temperature, when a water inflow temperature in which a coefficient of performance at the first hot water delivery temperature becomes equal to a coefficient of performance at the second hot water delivery temperature higher than the first hot water delivery temperature as a reference value A1 and a water inflow temperature exceeds the reference value A1. <P>COPYRIGHT: (C)2010,JPO&INPIT |
