| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat pump type heating hot water heater capable of preventing an average outgoing temperature from being higher than a target outgoing temperature and improving COP.SOLUTION: When a compressor is restarted at the time ts1 and outgoing temperature Tg becomes an upper limit temperature Tt1 or higher at the time t1 during a period from the time ts1 to the time te1 in which a compressor minimum operation time tcm elapses, an excessive calorie Qu1 during a period from the time t1 to the time t2 in which the compressor 1 is stopped at the time te1, and to which the outgoing temperature Tg starts to decrease and becomes the upper limit temperature Tt1 or lower is calculated. Then, if the outgoing temperature Tg is decreased and becomes the lower limit temperature Tt2 or lower at the time t3, the outgoing temperature Tg is taken from an outgoing temperature sensor for every predetermined time from the time t3 and every time a heat loss quantity Qd1 is calculated. Then, the compressor is restarted at the time t4 in which the excessive calorie Qu1 is equal to the heat loss quantity Qd1. At the time t4, the compressor is restarted and subsequently the aforesaid control is repeated.SELECTED DRAWING: Figure 4 |
