| 摘要 |
<P>PROBLEM TO BE SOLVED: To increase heat utilization efficiency of a heat source device even in a case when the small amount of hot water of high temperature is supplied or in a case when high-temperature heating is performed with small heating load in a water heater supplying heat by using one heat source device. <P>SOLUTION: This water heater comprises the heat source device 17, a sensible heat heat-exchanger 15, a water heating passage 3, a water supply passage 2, a tapping passage 4, a heat application water circulating passage 6 connected with a downstream side and an upstream side of the water heating passage 3, a circulation pump 19 for pressure-feeding the hot water of the heat application water circulating passage 6, a circulation passage for heating 7 for circulating a heat medium to a heating device, a heat exchanger for heating 20 performing the heat exchange between the hot water of the heat application water circulating passage 6 and the heat medium, an exhaust heat recovering heat exchanger 14 for supplying the heat of an exhaust gas discharged from the heat source device 17 to the water in the heating water passage 3, and an exhaust heat recovering heat exchanger 24 mounted on a heating return passage 7a for returning the heat medium from the heating device to the heat exchanger for heating 20 in the circulation passage for heating 7, and supplying the heat of exhaust gas passing through the exhaust heat recovering heat exchanger 14 to the heat medium in the heating return passage 7a. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
