| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hot water storage type water heater with reduced heat loss of expanded water. <P>SOLUTION: The hot water storage type water heater has a hot water storage operation mode heating water by a heat pump unit 1 to store hot water into a hot water storage tank 3. The hot water storage type water heater includes: a mixing valve 5 generating hot water of a predetermined temperature by mixing the hot water of the hot water storage tank 3 with water; a high-temperature discharge path 7 constituted by sequentially connecting a high-temperature pipe 4 discharging high-temperature hot water or air from an upper part of the hot water storage tank 3, high-temperature and low-temperature inlet parts 5a, 5b of the mixing valve 5, and an on-off valve 6; a low-temperature discharge path 9 constituted of a low-temperature pipe 8 for taking low-temperature water from a lower part of the hot water storage tank 3; an expanded water discharge pipe 11 and a pressure relief valve 12 provided to communicate with a joining portion 10 of the high-temperature discharge path 7 and a low-temperature discharge path 9; and a check valve 13 parallely-connected to the on-off valve 6. In the hot water storage operation mode, a time for opening the on-off valve 6 is provided. <P>COPYRIGHT: (C)2012,JPO&INPIT |
