| 摘要 |
The present invention relates to a hot water boiler for heating and heating water and improves the generation temperature of hot water for heating and heating water. The present invention connects compartments (27a, 27b) of each header (23) of a heat exchanger for heating water (20) and a heat exchanger for heating (30) and each end of an auxiliary heat exchange pipe for heating water (30a) and an auxiliary heat exchange pipe for heating (30b) to heating and heating water supply pipes (40a, 40b) and returning pipes (41a, 41b). Moreover, each valve (46a, 46b, 46c, 46d, 47a, 47b, 47c, 47d) is installed between connection points of an outlet side of each heating and heating water supply pipe (40a, 40b), an inlet side of the returning pipes (41a, 40b), a first pipe (42), a second pipe (43), a third pipe (44), and the first and the second pipes (42, 43) of the heating water returning pipe (41a), respectively. |
