| 摘要 |
PURPOSE:To suppress the overheating of a coupling part and obtain a small sized, light-weight and efficient heat exchanger by a structure wherein an air leading-in part is provided at the coupling part of a combustion chamber and a heat exchange part. CONSTITUTION:The combustion chamber 3, to which a burner 2 is faced, and the heat exchange part 5, to which the combustion chamber 3 is coupled through the coupling part 5, are provided in a main body casing 1 equipped with an inlet 1a, at which a fan 6 is installed, and an outlet 1b and in addition the air leading-in part 5a is formed at the coupling part 5. The burner 2 is actuated synchronously with a fan 8 installed in an exhaust pipe 7 and the fan 6. |
