Oil burner for low heating capacities

Claim 1

An oil burner including an oil conveying device, an air blower and a burner head, said burner head comprising: a substantially cylindrical burner tube having an outlet orifice at one end, said burner tube tapering towards the orifice, a burner nozzle situated in said burner tube, said burner nozzle having a plurality of supporting arms and being tapered towards said outlet orifice of said burner tube thereby to have a frustoconical end zone at a front end thereof, and a baffle plate attached to and supported by the supporting arms of said burner nozzle, said baffle plate having a cup shape and being arranged in said burner tube in front of said burner nozzle with the interior bottom of the cup shape facing the outlet orifice of said burner tube, the cup shape of said baffle plate including a bottom zone conically widening towards the outlet orifice of said burner tube and having a central opening with a diameter equal to or larger than that of the burner nozzle and a plurality of passage slots radially outwardly extending from the central opening, said passage slots being recessed by bends in the bottom zone forming strip zones extending angularly towards the outlet orifice of said burner tube, and an edge shell around the bottom zone widening towards the outlet orifice of said burner tube so that an annular gap is defined between a front end of the edge shell of said baffle plate and the inner face of said burner tube, whereby primary air in the burner head is conducted over said frustoconical end zone of said burner nozzle mainly into the central opening of said baffle plate to flow substantially parallel to an axis of said burner tube in at least the edge zone of said central opening of said baffle plate for imparting thorough mixing of air and oil, and secondary air in the burner head is ejected through said annular gap for complete combustion of oil.