| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot water supply device surely preventing freezing of pipes and valves regardless of presence or absence of residual hot water in a bathtub without needing a heater.SOLUTION: Hot water of high temperature heated by a heat source unit is stored in a hot water storage tank, a water supply pipe for supplying water, is connected to a bottom part of the hot water storage tank, and a water supply bypass pipe branched from the water supply pipe and bypassing the hot water storage tank, is connected. The hot water of high temperature guided from a hot water discharge pipe connected to an upper part of the hot water storage tank, and the water guided from the water supply bypass pipe are mixed by a bath mixing valve, and a hot water filling pipe is disposed to guide the same to a bathtub through a fluid control valve. A main control part having a control means for preventing freezing of hot water filling pipe, is disposed to prevent the freezing by opening the fluid control valve to satisfy prescribed conditions when an outside air temperature detected by an outside air temperature sensor detecting the outside air temperature, reaches a prescribed temperature or less, and a hot water filling pipe temperature detected by a hot water filling pipe temperature detecting means reaches a prescribed temperature or less, and supplying hot water/water to the hot water filling pipe. |
