| 摘要 |
<p>PURPOSE:To discharge a predetermined quantity of hot water at a predetermined temperature from a desired bathtub to be discharged via a hot water supply tube while supplying sufficiently heated hot water to a bathtub by deciding a bath circulation quantity based on a hot water supply request class number at the time of simultaneously using both a hot water supply side and a bath side. CONSTITUTION:Since sufficiently heated bath hot water can be supplied, when a hot water supply request class number calculated according to a detection signal of a water quantity detector 27, a supply hot water temperature detector 28, a supply water temperature detector 29 or a heat exchanger outlet temperature detector 30 is smaller than a predetermined class number in the case where a shower is taken while reheating for bath temperature keeping function, etc., to a bathtub 22, a circulation pump 20 is continuously operated. However, when the request class number reaches the predetermined class number, a duty ratio of the pump 20 is varied based on one bath circulating operation pattern stored in a memory in a controller C. When the request class number becomes a maximum, the pump 20 is completely stopped.</p> |
