| 摘要 |
For cooking appliances, a gas burner presenting externally at least one annular portion ( 50 ), characterised by presenting two gas inlets ( 3, 10 ), with which at least two injectors ( 4, 11 ) are associated respectively; the first gas inlet ( 3 ) supplying the air/gas mixture to a first annular chamber ( 55 ) provided in said annular portion ( 50 ) and communicating with a series of main ports ( 24 ) through which said mixture leaves to form at least one main flame ring ( 43 ) in the outer circumference of the annular portion ( 50 ); the second gas inlet ( 10 ) supplying the air/gas mixture to a second annular chamber ( 55 ) provided in said annular portion ( 50 ) and feeding a flame ring ( 27 ) which constitutes the only flame ignited in the burner when this is operating at minimum power.
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