| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a combustion apparatus operable in the limit of dew condensation according to use conditions. <P>SOLUTION: This combustion apparatus comprises a bypass passage 43 bypassing a heat exchanger 30, flow rate control means 44 and 102 controlling the flow rate of fluid flowing through the bypass passage, and a dewing lower limit temperature lead-out means 103 leading out the lower limit of the outlet temperature of the heat exchanger in a range where dew condensation does not occur. The dewing lower limit temperature lead-out means obtains the lower limit value by using the rate of fuel supplied to the burner, the rate of air supplied to the burner, and the humidity of the air supplied to the burner. The flow rate control means control the flow rate to the bypass passage so that the outlet temperature of the heat exchanger becomes the lower limit value. <P>COPYRIGHT: (C)2004,JPO |
