MULTIPLE COMBUSTION DEVICE, EXHAUST BACKFLOW PREVENTION METHOD AND MULTIPLE HOT WATER SUPPLY SYSTEM

摘要

PROBLEM TO BE SOLVED: To prevent exhaust flowing in an exhaust collection part from flowing back to a combustor during combustion stop, without needing backflow detection of exhaust.SOLUTION: A multiple combustion device (2) includes a plurality of combustors (12, a water heater 52), and collects exhaust (EG) of each combustor to an exhaust collection part (exhaust collection duct 18) and discharges the exhaust. The multiple combustion device also includes a backflow prevention part (backflow prevention adapter 20) in an exhaust passage between the exhaust collection part and the combustor, and a blower fan (28) blowing air to the exhaust passage from the combustor during combustion stop of the combustor. The multiple combustion device prevents the exhaust from flowing back from the exhaust collection part to the combustor during combustion stop.SELECTED DRAWING: Figure 1