| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat pump type water heater improving reliability by executing control to lower a temperature of a boiling heat exchanger when boiling operation is completed. <P>SOLUTION: The heat pump type water heater 100 performs cooling operation of the boiling heat exchanger 2 by controlling at least a compressor 1, an expansion valve 3 and a water supply pump 7 until predetermined time passes after completion of the boiling operation. <P>COPYRIGHT: (C)2011,JPO&INPIT |
