REGULATING OR CONTROLLING COMBUSTION (control devices specially adapted for combustion apparatus in which combustion takes place in a fluidised bed of fuel or other particles F23C10/28; condition responsive controls for regulating combustion in domestic stoves with open fires for solid fuel F24B1/187)

Introduced: September 1968

Description

F23N covers devices and methods for regulating and controlling combustion processes in furnaces, boilers, burners, and other combustion apparatus. The classification includes fuel supply control systems, air/oxygen supply regulation, flame monitoring and safety devices, and automatic control mechanisms that adjust combustion parameters to maintain stable operation. Typical applications encompass ignition control, fuel flow modulation, excess air management, and feedback systems for industrial heating equipment. This class excludes the combustion apparatus itself (covered in F23D, F23H) and specific fuel supply systems when not integrated with combustion control (covered in F23K).

Title

Titles differ between systems:

IPC: REGULATING OR CONTROLLING COMBUSTION

CPC: REGULATING OR CONTROLLING COMBUSTION (control devices specially adapted for combustion apparatus in which combustion takes place in a fluidised bed of fuel or other particles F23C10/28; condition responsive controls for regulating combustion in domestic stoves with open fires for solid fuel F24B1/187)

Full Title

Full titles differ between systems:

IPC:

REGULATING OR CONTROLLING COMBUSTION

CPC:

REGULATING OR CONTROLLING COMBUSTION (control devices specially adapted for combustion apparatus in which combustion takes place in a fluidised bed of fuel or other particles F23C10/28; condition responsive controls for regulating combustion in domestic stoves with open fires for solid fuel F24B1/187)

CPC subdivides this area 5x more granularly than IPC with 12 additional codes.

12 codes are CPC-only extensions.

Note: 12 CPC extensions are marked as secondary classification only.

2 shared codes have differing titles between IPC and CPC.

Child Classifications

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F23N 1/00 Regulating fuel supply +3 CPC IPC+CPC Available in IPC and CPC
F23N 2221/00 Pretreatment or prehandling 2nd only +6 CPC CPC only CPC only
F23N 2223/00 Signal processing; Details thereof 2nd only +23 CPC CPC only CPC only
F23N 2225/00 Measuring 2nd only +5 CPC CPC only CPC only
F23N 2227/00 Ignition or checking 2nd only +16 CPC CPC only CPC only
F23N 2229/00 Flame sensors 2nd only +11 CPC CPC only CPC only
F23N 2231/00 Fail safe 2nd only +13 CPC CPC only CPC only
F23N 2233/00 Ventilators 2nd only +3 CPC CPC only CPC only
F23N 2235/00 Valves, nozzles or pumps 2nd only +4 CPC CPC only CPC only
F23N 2237/00 Controlling 2nd only +12 CPC CPC only CPC only
F23N 2239/00 Fuels 2nd only +3 CPC CPC only CPC only
F23N 2241/00 Applications 2nd only +12 CPC CPC only CPC only
F23N 2900/00 Special features of, or arrangements for controlling combustion 2nd only +10 CPC CPC only CPC only
F23N 3/00 Regulating air supply or draught (conjointly with fuel supply F23N1/00) +3 CPC IPC+CPC Available in IPC and CPC
F23N 5/00 Systems for controlling combustion (regulating fuel supply F23N1/00, regulating air supply or draught F23N3/00) +1 CPC IPC+CPC Available in IPC and CPC