| 摘要 |
<P>PROBLEM TO BE SOLVED: To sufficiently gain an advantage by utilizing commercial power source in a predetermined criterion time of a day, in a heat pump type water heater executing compressor stop control. <P>SOLUTION: The longest time among a necessary compressor stop time Tc1, a necessary decompressor full-open time Tel and a duration time Tf1 is applied as a necessary stop time from start to termination of the compressor stop control, and the compressor stop control is started at a clock time earlier than a second reference clock time NT2 as a termination clock time of a late-night power time zone by the necessary stop time T1. Thus the operation of a heat pump cycle after the second reference clock time NT2 can be prevented, and advantage of power cost reduction can be sufficiently gained by utilizing the power of late-night power time zone. <P>COPYRIGHT: (C)2010,JPO&INPIT |
