| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat transfer fin structure of a heat exchanger for a gas boiler capable of increasing heat transfer area to extremely increase heat exchanging efficiency, reducing cost of a product, and compacting the product. SOLUTION: The gas boiler has a combustion chamber cover 10 having a combustion chamber 10a inside, the heat exchangers 24 disposed in the upper and lower parts of the combustion chamber, and a bas burner 22. The heat exchangers have a tubular tube 24a in which water circulates and a plurality of high fins 24b of not shorter than 9 mm extending from a plate surface to the radial outside on the outside of the tube. The high fins 24b are preferably rolled and fabricated to the tube 24a. COPYRIGHT: (C)2004,JPO
|
