| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a storage type water heater capable of preventing an uncomfortable feeling from being imparted to a user by suppressing hot water lower in temperature than a target temperature which is changed and set from being fed. <P>SOLUTION: A control means D for controlling an auxiliary heating means A and a water mixing means B executes stop mode operation processing for stopping the auxiliary heating means A and heating operation mode operation processing for heat-operating the auxiliary heating means A, determines that there arises an auxiliary heating necessary state when a difference between a hot water output temperature from a hot water accumulation tank and the target temperature reaches a heating determination set value or smaller, determines that there arises an auxiliary heating unnecessary state when the difference between the hot water output temperature and the target temperature reaches a non-necessity determination set value or larger which is larger than the heating determination set value, and when the output of the hot water from a hot water feed passage during the execution of the heating operation mode operation processing is stopped, changes the non-necessity determination set value to a value of a large set amount when the output of the hot water from the hot water feed passage is started within a set time after the stop of the output of the hot water. <P>COPYRIGHT: (C)2013,JPO&INPIT |
