F25B REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
Introduced: September 1968
Description
Covers refrigeration and cooling equipment, including compressor-based machines, absorption systems, and thermoelectric cooling devices used in industrial, commercial, and domestic applications. Encompasses combined systems that provide both heating and cooling functions, as well as heat pump systems that transfer thermal energy for temperature control. Includes the design, construction, and operation of refrigerant circuits, compressors, condensers, evaporators, and associated components. Excludes ice manufacture and gas liquefaction when classified separately under other subclasses, as well as thermal insulation and specific refrigerant chemistries.
Of 43 combined children, 28 exist in both systems.
15 codes are CPC-only extensions.
Note: 15 CPC extensions are marked as secondary classification only.
11 shared codes have differing titles between IPC and CPC.
Child Classifications
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- F25B 1/00 Compression machines, plants or systems with non-reversible cycle (F25B3/00, F25B5/00, F25B6/00, F25B7/00, F25B9/00 take precedence) +1 CPC IPC+CPC Available in IPC and CPC
- F25B 11/00 Compression machines, plants or systems, using turbines, e.g. gas turbines IPC+CPC Available in IPC and CPC
- F25B 13/00 Compression machines, plants or systems, with reversible cycle (defrosting cycles F25B47/02) IPC+CPC Available in IPC and CPC
- F25B 15/00 Sorption machines, plants or systems, operating continuously, e.g. absorption type +4 CPC IPC+CPC Available in IPC and CPC
- F25B 17/00 Sorption machines, plants or systems, operating intermittently, e.g. absorption or adsorption type IPC+CPC Available in IPC and CPC
- F25B 19/00 Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour +1 CPC IPC+CPC Available in IPC and CPC
- F25B 21/00 Machines, plants or systems, using electric or magnetic effects IPC+CPC Available in IPC and CPC
- F25B 23/00 Machines, plants or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect +2 CPC IPC+CPC Available in IPC and CPC
- F25B 2300/00 Special arrangements or features for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems 2nd only CPC only CPC only
- F25B 2313/00 Compression machines, plants or systems with reversible cycle not otherwise provided for 2nd only +15 CPC CPC only CPC only
- F25B 2321/00 Details of machines, plants or systems, using electric or magnetic effects 2nd only +4 CPC CPC only CPC only
- F25B 2327/00 Refrigeration system using an engine for driving a compressor 2nd only +1 CPC CPC only CPC only
- F25B 2341/00 Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves 2nd only +2 CPC CPC only CPC only
- F25B 2345/00 Details for charging or discharging refrigerants; Service stations therefor 2nd only +7 CPC CPC only CPC only
- F25B 2347/00 Details for preventing or removing deposits or corrosion 2nd only +1 CPC CPC only CPC only
- F25B 2400/00 General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B 2nd only +22 CPC CPC only CPC only