| 摘要 |
PURPOSE:To enhance the heating efficiency and reduce the heat dissipation loss and consequently enhance the total efficiency by a method wherein hot water with necessary quantity and temperature is ensured at necessary times. CONSTITUTION:During the time zone ranging from night to early morning, the contact 11a is closed while the contact 11b of a timer 11 is open and consequently a relay 12 is controlled by a water temperature sensor 7a, which has a contact 7a' connected in series to the contact 11a and is used for setting medium temperature. Next, when the afternoon time set by the timer 11 comes, the contact 11b is closed, resulting in energizing the relay 12 so as to start to drive heat pump operation by a water temperature sensor 7b, which has a contact 7b' and is used for setting high temperature (70 deg.C). When the temperature of the water in a hot water storage tank 6 arrives as high as the set temperature of the water temperature sensor 7b or 70 deg.C, the contact 7b' is open, resulting in stopping the heat pump operation. Concretely, the temperature of the water in the hot water storage tank has risen up to a high temperature of 70 deg.C by evening in order to provide for the large consumption of hot water by taking bath during the period of time ranging from evening to night. |
