A high turn-down burner adapted to receive a fuel flow for combustion including an outer housing including a central axis, a side wall having a top edge and a bottom edge, a plurality of apertures disposed on the side wall, a top wall adjoining the side wall at the top edge and a bottom wall adjoining the side wall at the bottom edge; an inner housing including a central axis, a side wall, a plurality of apertures disposed on the side wall, the inner housing is coaxially rotatable with respect to the outer housing; and an actuator adapted to harness and convert the power exerted by the fuel flow to a movement of the inner housing with respect to the outer housing, wherein the alignment of the apertures of the inner and outer housings is adapted to modify an effective combustion area of the burner.

The present invention relates to a burner. At least one first passage, at least one second passage and a mixing chamber are formed in the burner, and the mixing chamber is respectively connected to an outlet of the first passage and an outlet of the second passage, so that a first fluid and a second fluid are mixed in the mixing chamber to form a fluid mixture; wherein the burner includes a nozzle, and at least one through passage fluidly connected to the mixing chamber is formed in the nozzle, so that the fluid mixture flows out from the at least one through passage, and wherein the sum of the sectional areas of the at least one through passage is smaller than the sectional area of the mixing chamber.

A combustion cell (1) for a heating system comprising: a fan unit (2), configured to supply a flow of premixed air-gas required for the combustion, a lid (3); a burner, (5) comprising a central perforated zone (501) and a peripheral zone (502) free of holes; a distributor (6), comprising a peripheral part provided with apertures (601) and positioned upstream of the burner (5) for feeding the flow of premixed air-gas to the burner (5), with its peripheral part facing towards the peripheral zone (502) of the burner (5); a flange (7) configured to connect the lid (3) to the burner (5); a coil (8) for exchanging heat, wherein the flange (7) has a receiving surface (701) which receives a first spiral (801) of the coil (8) to exchange heat in direct contact with the flange (7).

A device for controlling a fuel-oxidizer mixture for a premix gas burner, comprises: an intake duct for admitting the mixture into the burner; an injection duct, connected to the intake duct to supply the fuel; a monitoring device for checking the state of combustion in the burner; a gas regulating valve; a fan located in the intake duct; a control unit for controlling the speed of rotation of the fan between a first and a second rotation speed, corresponding to a minimum flow rate of oxidizer (Qmin) and a maximum flow rate of oxidizer (Qmax), respectively; a regulator coupled to the intake duct and having a first aperture, adjustable through a first shutter, and a second aperture, adjustable through a second shutter. The control unit is configured to drive the gas regulating valve in real time.

A gas cooking assembly comprises: (a) a base part (10) comprising: (a1) a burner body (14) for installation in a cooktop surface (16); (a2) a gas outlet (20) in the burner body (14); and (a3) an ignition source (22) in the burner body (14); and (b) an upper part (12) comprising: (b1) at least one foot (36) for supporting the upper part (12) on the cooktop surface (16); (b2) a grate (26) for supporting a cooking vessel; (b3) an annular flame spreader (28); and (b4) a gas inlet (46) at the bottom side of the flame spreader (28); wherein the upper part (12) is an integral unit that is removable from the base part (10), wherein when the upper part (12) is connected to the base part (10), the gas inlet (46) of the upper part (12) connects to the gas outlet (20) of the base part (10).

A burner gas supply apparatus for increasing flame turbulence, the apparatus comprising a conduit having a characteristic width, W, defined by an inner surface having a circumferential direction and an axial direction, the axial direction terminating in a nozzle defining a nozzle exit plane and having a characteristic dimension, d, where d<=W; and three bluff bodies each with a characteristic dimension, D.sub.bb-i, projecting a length, L.sub.i into the conduit from the inner surface, and an axial spacing X.sub.i between adjacent bluff bodies (between the downstream bluff body and the nozzle exit plane in the case of X.sub.1) wherein 0.5<=L.sub.i/W<=1 and wherein X.sub.i/D.sub.bb-i<=30.

A combustion plate is for use in a totally aerated combustion burner in which a plate main body made of ceramic has formed therein a multiplicity of flame holes for ejecting a premixed gas. The plate main body is provided, in a lattice shape, with non-flame-hole sections free of flame holes. Each of those sections of the plate main body which are enclosed by the non-flame-hole sections constitutes a collective flame-hole section having formed therein in a crowded manner a plurality of flame holes. Flame holes formed in those peripheral portions of the collective flame-hole sections which are adjacent to the non-flame-hole sections are smaller in diameter than the diameter of the flame holes formed in those portions of the collective flame-hole sections which are inner than the peripheral portions.

A high turn-down burner adapted to receive a fuel flow for combustion. The burner includes a housing having a side wall with an interior surface forming an inner periphery, a bottom wall adjoining the side wall, a top wall adjoining the side wall and a plurality of apertures disposed on the side wall; a supply tube adapted through the top wall of the housing, the supply tube including a side wall having an outer surface forming an outer periphery, a top end, a bottom end, wherein the supply tube is adapted to receive the fuel flow at the top end of the supply tube; and a disk having an opening adapted to accommodate the supply tube, wherein the disk is configured to slide along a length of the supply tube within the space delineated by the inner periphery of the housing and the outer periphery of the supply tube.

A burner assembly combines oxygen and fuel to produce a flame. The burner assembly includes an oxygen supply tube adapted to receive a stream of oxygen and a fuel supply tube arranged to extend through the oxygen tube to convey a stream of fluidized, pulverized, solid fuel into a flame chamber. Oxygen flowing through the oxygen supply tube passes through oxygen-injection holes formed in the fuel supply tube and then mixes with fluidized, pulverized, solid fuel passing through the fuel supply tube to create an oxygen-fuel mixture in a downstream portion of the fuel supply tube. This mixture is discharged into the flame chamber and ignited in a flame chamber to produce a flame.

A door with a gas burner on an inner surface and a system for carrying a combustible gas to the burner on the outer surface thereof. The door comprises a pair of metal sheets rigidly connected to one another at the edges thereof, each sheet having input and output openings for the gas mixture that are mutually separated in order to leave an inner space receiving a deflector plate serving as a thermal shield to be swept over on either side by the flow of the gas mixture supplying the burner. This arrangement reduces heat loss through the door; thus, keeping the outer surface cold, avoiding the risk of burns, and preheating the gas mixture. The invention can be used in heating appliances.