| 摘要 |
<p>PURPOSE:To enable a large amount of hot water to be used even in case of a small-sized hot water feeder by a method wherein at mid-night, a specified preference time zone for boiling up hot water is provided and at the same time even at a time zone except the preference time zone, a boiling can be performed again under an action of a thermostat every time the hot water is used within a range of predetermined times. CONSTITUTION:An electrical hot water feeder is energized for eight hours at mid-night of a preference time zone set by a timer device 14 and then the hot water is boiled up to a predetermined temperature within the specified time. If the number of counts of the counter is set by the number of times setting means 17 until 10 hours elapse, an additional boiling is carried out just after use until the specified times come, resulting in that at the time when a hot water feeding is started for a bath tub in the evening, all amount of hot water in the tank are already boiled up to a predetermined hot water temperature and it becomes possible to provide the same amount of hot water as that of the prior art even in case of the hot water feeder having a small capacity and then its installation at a narrow space in a home can be carried out.</p> |
