| 摘要 |
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 ( 8 a) 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. |
