| 摘要 |
PURPOSE:To prevent the generation of impact noise and to improve quietness and a heating effect, by a method wherein a fine bypass escape hole is formed in one end on the upper side of a heat absorbing pipe, and a part of water forced circulating through the heat absorbing pipe is made to escape into a water chamber. CONSTITUTION:A first heat absorbing 14, extending across a smoke box 6, is horizontally laid in a position above a heated water pipe 7 with a gentle slope, one end on the lower side is opened to a water chamber 3, one end on the upper side is formed in a blind holeform manner to communicate with the water chamber 3, and an escape hole 18 is opened downward. A second heat absorbing pipe 19, extending across the smoke box 6, is coupled in a meandering manner to a position above the first heat absorbing pipe 14 with a gentle slope, and an escape 20 is opened to the coupling part in a manner to communicate with the water chamber 3. Since, as noted above, fine escape holes 18 and 20 are formed downward in the heat absorbing pipes 14 and 19, respectively, and therefore an action to perform smooth forced circulation is provided. This constitution prevention of the occurrence of an impact and causes increase of a circulation speed to provide a high temperature heat absorbing action.
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