| 摘要 |
The present invention relates to a gas burner (10) comprising a cylindrical burner head (11) having a plurality of burner orifices (15) in a cylindrical surface thereof, fan means (23, 24, 25) for supplying a gas air mixture to said burner head (11) gas supply means (26) for supplying a combustible gas within the vicinity of the fan inlet (25) so that the fan means (23, 24, 25) takes in atmospheric air and gas from said supply means and a zero governor (40) included in the gas supply means, said governor (40) being connected between the outlet for said fan means (23, 24, 25) and a combustion chamber for the burner (10) so that when the pressure in the combustion chamber relative to the fan supply means (23, 24, 25) increases above a predetermined datum the gas supply is shut off.
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