| 摘要 |
PROBLEM TO BE SOLVED: To provide a corrosion prevention type chimney in which the formation of a heat bridge section onto the interior wall of an internal cylinder is prevented by simple structure and corrosion due to dew condensation can be prevented. SOLUTION: The chimney 15 is composed of an internal cylinder 1, in which a heat-insulating material 8 is wound on an external surface and an internal surface is used as a flue, and a supporting material 16 supporting the internal cylinder 1 on the external surface side of the internal cylinder 1. The internal cylinder 1 is made of a steel plate, the whole external surface la of the internal cylinder 1 is covered with the heat-insulating material 8, and a heat-insulating protective cover 20 is installed onto the surface of the heat-insulating material 8. On the other hand, the supporting material 16 comprises a supporting material body 17 and a ring-shaped member 18, and these body and member are connected by a connector 19, and constituted integrally. Since the ring-shaped member 18 is not fixed onto the external surface of the heat-insulating material 8 and the internal cylinder 1 is supported through the heat-insulating material 8, the whole external surface of the internal cylinder 1 is covered uniformly with the heat-insulating material 8 and an exposed section can be removed.
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