| 摘要 |
PURPOSE:To reduce the discharge of an intermediate product such as carbon monoxide contained in combustion exhaust gas or the generation of NO2 by changing the volume of a combustion chamber housing a burner in response to the changeover to the high or low combustion amount. CONSTITUTION:A combustion chamber 5 consists of a space surrounded by a partition plate 8 which is set to surround a flame 7 formed on a burner flame port 6. The plate 8 and a rear wall 12 are connected with a heat resisting spring 9 and the plate 8 subjected to the flame temp. due to the difference in the combustion amount and its heat is rotated around the lower end 20 of the combustion chamber by the difference in temp. of the spring 9. At the time of low combustion the chamber 5 has a space indicated by a broken line because of no elongation and contraction of the spring 9. As the combustion amount is increased and the combustion approaches high one, the temp. of the spring 9 is further raised and the spring 9 is contracted to move the plate 8 to the location indicated by a solid line and at the time of high combustion the space surrounded by the solid line is formed in the chamber 5. As above, the chamber 5 is equipped with a structure capable of changing in response to the combustion amount and the performance of combustion exhaust gas can be therefore remarkably improved. |
