WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

F23L　AIR SUPPLY; DRAUGHT-INDUCING; SUPPLYING NON-COMBUSTIBLE LIQUID OR GAS (air-supply arrangements for fluent fuels F23C; dampers and throat restrictors for open fire-places F24; air inlet valves for open fire fronts F24)

F23L 1/00 Passages or apertures for delivering primary air for combustion

F23L 1/02 ・by discharging the air below the fire

F23L 3/00 Arrangements of valves or dampers before the fire

F23L 5/00 Blast-producing apparatus before the fire

F23L 5/02 ・Arrangements of fans or blowers (fans or blowers per se F04)

F23L 5/04 ・by induction of air for combustion, e.g. using steam jet

F23L 7/00 Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam

F23L 7/002 ・{Supplying water}

F23L 7/005 ・・{Evaporated water; Steam}

F23L 7/007 ・{Supplying oxygen or oxygen-enriched air}

F23L 9/00 Passages or apertures for delivering secondary air for completing combustion of fuel

F23L 9/02 ・by discharging the air above the fire

F23L 9/04 ・by discharging the air beyond the fire, i.e. nearer the smoke outlet

F23L 9/06 ・by discharging the air into the fire bed

F23L 11/00 Arrangements of valves or dampers after the fire

F23L 11/005 ・{for closing the flue during interruption of burner function}

F23L 11/02 ・for reducing draught by admission of air to flues

F23L 13/00 Construction of valves or dampers for controlling air supply or draught (in general F16K)

F23L 13/02 ・pivoted about a single axis but having not other movement (formed as linked slats each pivoted about an axis F23L 13/08)

F23L 13/04 ・・with axis perpendicular to face

F23L 13/06 ・slidable only

F23L 13/08 ・operating as a roller blind; operating as a venetian blind

F23L 13/10 ・having a compound movement involving both sliding and pivoting

F23L 15/00 Heating of air supplied for combustion

F23L 15/02 ・Arrangements of regenerators

F23L 15/04 ・Arrangements of recuperators

F23L 15/045 ・・{using intermediate heat-transfer fluids}

F23L 17/00 Inducing draught

F23L 17/005 ・{using fans}

F23L 17/02 ・Tops for chimneys or ventilating shafts; Terminals for flues

F23L 17/04 ・・Balanced-flue arrangements, i.e. devices which combine air inlet to combustion unit with smoke outlet

F23L 17/06 ・・branched; T-headed

F23L 17/08 ・・with co-axial cones or louvres

F23L 17/10 ・・wherein the top moves as a whole

F23L 17/12 ・・Devices for fastening the top or terminal to chimney, shaft, or flue

F23L 17/14 ・・Draining devices

F23L 17/16 ・Induction apparatus, e.g. steam jet, acting on combustion products beyond the fire

F23L 99/00 Subject matter not provided for in other groups of this subclass

F23L 2700/00 Installations for increasing draught in chimneys; Specific draught control devices for locomotives

F23L 2700/001 ・Installations for increasing draught in chimneys

F23L 2700/002 ・Specific draught control devices for locomotives

F23L 2900/00 Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber

F23L 2900/00001 ・Treating oxidant before combustion, e.g. by adding a catalyst

F23L 2900/05021 ・Gas turbine driven blowers for supplying combustion air or oxidant, i.e. turbochargers

F23L 2900/07001 ・Injecting synthetic air, i.e. a combustion supporting mixture made of pure oxygen and an inert gas, e.g. nitrogen or recycled fumes

F23L 2900/07002 ・Injecting inert gas, other than steam or evaporated water, into the combustion chambers

F23L 2900/07003 ・Controlling the inert gas supply

F23L 2900/07004 ・Injecting liquid or solid materials releasing oxygen, e.g. perchlorate, nitrate, peroxide, and chlorate compounds, or appropriate mixtures thereof

F23L 2900/07005 ・Injecting pure oxygen or oxygen enriched air

F23L 2900/07006 ・Control of the oxygen supply

F23L 2900/07007 ・using specific ranges of oxygen percentage

F23L 2900/07008 ・Injection of water into the combustion chamber

F23L 2900/07009 ・Injection of steam into the combustion chamber

F23L 2900/15021 ・using regenerative heat exchanger bodies with different layers of material

F23L 2900/15022 ・using pre-purging regenerator beds

F23L 2900/15041 ・Preheating combustion air by recuperating heat from ashes

F23L 2900/15042 ・Preheating combustion air by auxiliary combustion, e.g. in a turbine

F23L 2900/15043 ・Preheating combustion air by heat recovery means located in the chimney, e.g. for home heating devices

F23L 2900/15044 ・Preheating combustion air by heat recovery means using solar or other clean energy