| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a storage type hot water supply device not becoming a cause of noise even when it is used while using a hot water supply pressurizing pump to raise a hot water supply pressure, particularly in a midnight time zone wherein a periphery becomes quiet. <P>SOLUTION: The storage type hot water supply device is provided with a hot water storage tank 1 storing hot water heated by a heating means 3, a hot water supply pipe 27 sending out the hot water in the hot water storage tank 1 by opening of a hot water tap 4, and the hot water supply pressurizing pump 29 provided in a midway part of the hot water supply pipe 2 to carry out pressure feed of the hot water to the hot water tap 4. In the hot water supply pressurizing pump 29, since a rotational frequency is lowered than as in a normal time zone in at least the midnight time zone, the storage type hot water supply device is used for usage in a place with an extremely low water service pressure or hot water supply to a third floor, and it is very convenient. Since the rotational frequency of the hot water supply pressurizing pump 29 is lowered than as in the normal time zone in the midnight time zone wherein the periphery becomes quiet, driving noise becomes low and there is no worry about being a nuisance to neighbors due to noise, and it can be always used with a peace of mind and without feeling any constraint. <P>COPYRIGHT: (C)2007,JPO&INPIT |
