| 摘要 |
PURPOSE:To make a hot water boiler of a small size and a simple construction by making a flue connected to a combustion chamber in a boiler can into a coil form. CONSTITUTION:A combustion cylinder 3 with a burner 2 on one end is installed in the lower part of a can 1 and on the other end of the combustion cylinder 3, a coil form flue 6 is connected, the other end 61 of which is opened to the outside of the can. |
