| 摘要 |
PURPOSE:To improve a heat exchanging efficiency by a method wherein an exhaust pipe is provided in a water pipe for the fin-pipe type heat exchanger for a gas hot-water supplying machine of a forced combustion system and combustion exhaust gas flowed along the periphery of the water pipe is introduced into the exhaust pipe. CONSTITUTION:The fin-pipe type heat exchanger of the hot-water heater is consisting of the exhaust pipe 12 equipped with baffles 14... and penetrating through the inner side of the water pipe 6 provided with a multitude of fins 5 on the periphery thereof, and a plurality of openings 13 are provided at the piled part of both pipes 6, 12 with proper intervals. One end of the exhaust pipe 12 is closed and the other end thereof is opened while an exhaust fan 8 is provided at the open end. When the burner 1 is operated in the above described device, the water pipe 6 is heated directly by the combustion gas and the water in the pipe 6 is heated also by the combustion gas discharged through the exhaust pipe 12 from the inside thereof. According to this method, the water in the pipe 6 may be heated efficiently and is discharged from a hot-water discharging pipe 16. |
