| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce size and weight of an appliance and to improve efficiency by applying a single heat source for supplying hot water, heating and bathing by combining a hot water supplying-heat exchanger and a latent heat recovering-heat exchanger. <P>SOLUTION: This hot water supply heating device is provided with a hot water supply circuit formed from a water supply passage 1 to a tapping passage 3 through the latent heat recovering-heat exchanger 16 and the hot water supplying-heat exchanger 15, and a hot water supplying circulating circuit 19 for taking out the water from the hot water supplying-heat exchanger 15, supplying the water to a use-side heat exchanger 18, and returning the water to the latent heat recovering-heat exchanger 16 through a circulation pump 17, and further comprises a first burner 2A performing combustion within a predetermined rated capacity range when the hot water supply circuit 3 is used, and a second burner 2B performing combustion within the predetermined rated capacity range when the hot water supplying circulating circuit 19 is used. The first burner and the second burner have the order of priority, so that a special operation mode is released and an ordinary operation mode is returned when the operation request is done from the burner of high priority during the operation of the burner of low priority in the special operation mode. <P>COPYRIGHT: (C)2007,JPO&INPIT |
