Patent ID: 9097419
Filing Date: 2015-08-04
Classification: F23D,F23N

Abstract:
1. A comburent/combustible-gas premix burner, comprising the following components: ventilation means for sending the comburent and the comburent/combustible-gas mixture to a combustion head; means for regulating the immission of the combustible gas; a comburent/combustible-gas mixing system comprising means for localized pressure loss; and a combustion head, provided with a device for ignition of the comburent/combustible-gas mixture and for detection of the presence of the flame; wherein said mixing system is divided into two mixing channels for mixing the comburent with the combustible gas, wherein the two mixing channels are in fluid communication via a reverse flow extending between the two mixing channels, and wherein only one of the mixing channels is provided with open/close means designed to regulate the flowrate of the mixture through said two channels; wherein said mixing system is divided into said mixing channels by a baffle element, the baffle element being shaped in such a way as to bestow upon each mixing channel a shape of a Venturi tube such that the inlets to each of the Venturi tubes are subject to the same inlet pressure; wherein said open/close means envisages weight and shape adequate for opening the passage for air, or for the air/gas mixture, at values of pressure difference higher than a preset minimum; wherein a force generated by the pressure difference acts against a weight of the open/close means alone; and wherein, when the open/close means are completely closed, a negligible air flow is determined in the reverse flow conduit connecting the mixing channels.