| 摘要 |
An air-gas mixer device (1, 100), in particular for gas burners (2) with forced ventilation, is described and comprises an air-gas mixing chamber (12) for producing a combustible mixture to be delivered to the burner, in which the chamber (12) is supplied by a first flow of a mixture of primary air and of gas and by a second flow of secondary air through a first duct (5) and a second duct (6), respectively. The device comprises first means for choking the first duct (5) and/or the second duct (6) so as selectively to choke the quantity of the mixture of primary air and gas and/or of secondary air supplied to the mixing chamber (12). |
