| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat pump water heater capable of surely detecting the improper connection of pipes in installation. <P>SOLUTION: This heat pump water heater comprises a watering temperature detecting means 20D for detecting a temperature of the water supplied to a hot water supply heat exchanger 12, a tapping temperature detecting means 20E for detecting a tapping temperature after the heat exchange by the hot water supply heat exchanger 12, and tank temperature detecting means 20A-C for detecting a temperature of a hot water storage tank 20. The improper connection of a watering pipe conduit and a tapping pipe conduit is judged when a state that the watering temperature is higher than the tapping temperature by more than a predetermined temperature, is continued for more than a predetermined time, the tank temperature is lower than a predetermined temperature, and the watering temperature is higher than a predetermined temperature. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
