| 摘要 |
<P>PROBLEM TO BE SOLVED: To lower a temperature of bathtub hot water without wasting water and heat energy. <P>SOLUTION: A reheating circulation pathway connected to the bathtub is thermally connected to a hot water storage tank through a liquid circulation pathway for a heat collector for circulating liquid to the heat collector for collecting heat of sunlight, and a liquid circulation pathway for a heater connected to a heating device. A heat exchange control means 11 for lowering a temperature, receives a bathtub hot water temperature lowering command for lowering the bathtub hot water temperature in comparison with a predetermined bath set temperature, compares a bathtub hot water temperature detection value with a stored hot water detection value, and drives a bathtub hot water circulation pump 6 when the stored hot water temperature detection value is lower than the bathtub hot water temperature detection value to circulate the bathtub hot water through the reheating circulation pathway without reheating the water, and lowers the bathtub hot water temperature by exchanging heat between the circulated bathtub hot water and the hot water in the hot water storage tank through the liquid circulation pathway for the heat collector and the liquid circulation pathway for the heater. <P>COPYRIGHT: (C)2012,JPO&INPIT |
