| 摘要 |
PROBLEM TO BE SOLVED: To provide a bath system in which the environment of using a bathroom, e.g. bathing environment, can be made comfortable. SOLUTION: The reheating/circulating circuit 26 of a forced circulation reheating bath heater can be switched between a direct heating circuit 7 circulating through a bathtub 4 and an indirect heating circuit 8 circulating through a heat discharging means 5 by means of a switching control unit 6. At the time of reheat operation, bathing/nonbathing is determined from abrupt variation of water level detected by a bathtub water level sensor 32. In case of nonbathing, three-way changeover valves 61, 62 are switched such that supply pipelines 26a, 7a are interconnected and return pipelines 26b, 7b are interconnected to raise the temperature of hot water in the bathtub directly. In case of bathing, the three-way changeover valves are switched such that supply pipelines 26a, 8a are interconnected and return pipelines 26b, 8b are interconnected to return hot water in an expansion tank 83 to a heat exchanger 27 and to supply reheated hot water to the heat discharging means. The heat discharging means discharges heat of hot water thus supplied to heat the bottom wall 42 of the bathtub thus raising the temperature of hot water in the bathtub indirectly.
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