| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat pump water heater which has a function of displaying actual achievement of an energy reduction amount and/or CO<SB POS="POST">2</SB>emission/reduction amounts on a monitor. <P>SOLUTION: The heat pump water heater includes: a boiling circulation pipe line 4 in which low-temperature water in a bottom part of a hot water tank 2, in which supply water is supplied in the bottom part, is sucked up by a boiling circulation pump 5, is heated by a heat pump device 1, and is returned to a top part of the hot water tank; mixing valves 10, 12 which mix supply water in hot water discharged from the top part of the hot water tank 2 to adjust at a predetermined temperature; and an electrical device for driving the heat pump water heater. The heat pump water heater obtains a hot water supply heat amount Qo by integrating a heat amount supplied to a hot water supply load over a set time by taking in a measurement value T1 of a water supply temperature, measurement values (T2-T5) of the hot water supply temperatures, and measurement values (F1-F3) of hot water supply amounts, while obtaining an electric power consumption heat amount Qi on calorie basis is obtained by taking in a measurement value W of an electric power consumption amount of the electrical device and integrating over the set time, and obtaining the energy reduction amount Qr=Qo-Qi, which is displayed on the monitor 45. <P>COPYRIGHT: (C)2012,JPO&INPIT |
