| 摘要 |
PURPOSE:To obtain uniform temperature distribution while improving exhaust heat recovery rate by connecting the ends of a continuous radiation pipe to an air supply pipe separated from a branch pipe while the diameter of the branch pipe is formed of be suddenly wider than that of an air introducing pipe and equipping the branch pipe with a switching mechanism. CONSTITUTION:Since a branch pipe 2 is formed to be suddenly wider than that of an air introducing pipe 4, a vortex is produced at the pipe wall part thereof to be in a negative pressure state. When a charge valve 9 is closed and another change valve 9' is opened, the vortex produced at the side of the change valve 9' is eliminated and negative pressure is not produced at the side of the change valve 9'. Therefore, air flow is sucked to the side of the change valve 9, a passage shown in a continuous line arrow mark, namely the air flow is flowed only to the side of an air supply pipe 3 and introduced in a radiation pipe 1 from a connecting part 6. After combustion gas sufficiently heat an accumulator 8 to discharge from an exhaust part 15, but combustion by a burner part 7 is continued for tens seconds or for a few minutes, the combustion gas is allowed flow as shown by a broken line in the righthand figure and the accumulator 8 is heated and discharged from an exhaust part 15 when the change valve 9 is opened and the other change valve 9' is closed. |
