Gas-fired heating apparatus
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United States of America Patent
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-
Aug 7, 2007
Grant Date -
Aug 11, 2005
app pub date -
Nov 1, 2004
filing date -
Feb 7, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The gas-fired heater, especially a water heater, has an atmospheric gas burner (5) arranged within a nearly or completely closed combustion chamber (2) and associated with a premixing gas/air supply system (8) with a fuel gas feed nozzle (10). In order to avoid oscillations, which lead to sound waves and combustion instabilities, an oscillation-damping air supply chamber (11, 11', 11'') is connected to the entrance (8a) of the gas/air supply system (8) for combustion air, within which the fuel gas feed nozzle is arranged. The air supply chamber (11, 11', 11'') is provided with at least one air entrance (12, 12', 12''). The air supply chamber can be box-like, duct-like embracing or extending around the combustion chamber or it can be a pipe with different diameter pipe sections.
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