| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent wrong detection of flame of a flame rod caused by dropping of dew condensation water in a combustion device having a gas-liquid heat exchanger. <P>SOLUTION: A dew condensation water visor 10 is disposed on an upper portion of insulator 9 for retaining a frame rod 8. Thus the dew condensation water is prevented from dropping on the insulator 9 by the visor 10. <P>COPYRIGHT: (C)2007,JPO&INPIT |
