| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a hot water storage type water heater comprising a bath reheating function capable of being composed of a small number of components. <P>SOLUTION: A temperature relation table LUT indicating a relation between a tank upper temperature T<SB>top</SB>and a bathtub water temperature T<SB>bus</SB>, and a reheating circulation water temperature T<SB>bott</SB>of hot water flowing in a reheating circulation passage at a downstream side of a reheating heat exchanger on the basis of a flow rate F<SB>1</SB>of a reheating circulation pump 18 and a flow rate F<SB>2</SB>of a bath circulation pump 21, is stored in a temperature relation table storing means 51. A reheating circulation water temperature calculating means 54 calculates the reheating circulation water temperature T<SB>bott</SB>by using the temperature relation table on the basis of the tank upper temperature T<SB>top</SB>and the bathtub water temperature T<SB>bus</SB>during a reheating operation. A reheating load calculating means 55 calculates reheating load by temporally integrating a product F<SB>1</SB>×(T<SB>top</SB>-T<SB>bott</SB>) of the flow rate F<SB>1</SB>of the reheating circulation pump and difference obtained by subtracting the reheating circulation water temperature T<SB>bott</SB>from the tank upper temperature T<SB>top</SB>. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
