| CPC F24H 1/124 (2013.01) | 6 Claims |
|
1. A hot water apparatus comprising:
a burner comprising a burner port plate provided with a plurality of burner ports, wherein a mixed gas of fuel gas and air supplied to a back side of the burner port plate is capable of passing through the plurality of burner ports to burn in a combustion region on a surface side of the burner port plate;
a heat exchanger capable of heating hot water using combustion gas generated by driving combustion of the burner;
a flame rod that comprises a core wire part having electrical conductivity and an insulator part holding the core wire part, and serves to detect flame of the burner based on contact of the core wire part with flame during driving combustion of the burner; and
a case comprising a side wall part surrounding the combustion region, wherein
the flame rod is attached to the side wall part of the case such that the insulator part is positioned on a downstream side of the burner port plate in a combustion gas flow direction, and the core wire part comprises: an extending part extending from the insulator part toward the burner port plate; and a tip-side part positioned closer to a tip of the core wire part than the extending part, and
in the combustion gas flow direction, the tip-side part of the core wire part is opposed to at least one of the plurality of burner ports, and the extending part is not opposed to any of the plurality of burner ports, wherein
the plurality of burner ports are in principle provided at the burner port plate in an arrangement of a particular pattern, and as an exception, against the particular pattern, a burner port exclusion region where arrangement of the plurality of burner ports is excluded is provided at the burner port plate, and
in the combustion gas flow direction, the extending part of the core wire part is opposed to the burner port exclusion region.
|