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