| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a highly economical combustion chamber of a gas boiler capable of making a device into a small and compact size and improving the yield. <P>SOLUTION: In this combustion chamber of the gas boiler, in order to increase the heat transfer area of a heating water inflow pipe to improve the heat exchange efficiency, the heating water inflow pipe 25 is formed within the combustion chamber 10, and a heat insulating member 45 is provided in the housing 15 of the combustion chamber. A heat exchange pipe is formed in a double structure of an inner copper material pipe and an outer aluminum material pipe, and a heat absorbing fin 35 is formed on the circumferential surface of the aluminum material pipe through a rolling work. Otherwise, the whole heat exchange pipe is formed in a single structure of a copper material pipe, and the heat absorbing fin 35 is formed on the circumferential surface of the pipe through rolling work. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
