F
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  
LIGHTING; HEATING
 F25
REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
 F25B
REFRIGERATION MACHINES, PLANTS, OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS (heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants, or materials for the production of heat or cold by chemical reactions other than by combustion C09K 5/00; pumps, compressors F04; use of heat pumps for domestic or space-heating or for domestic hot-water supply F24D; air-conditioning, air-humidification F24F; fluid heaters using heat pumps F24H)
 F25B

Note(s)

  1. Attention is drawn to Note (2) following the title of subclass F24F.  [5]
  2. When classifying heat pump circuits or systems, groups F25B 1/00-F25B 25/00 and F25B 29/00 take precedence over group F25B 30/00.  [5]
 F25B
Subclass index
MODE OF OPERATION
Compression type
characterised by the cycle 1/00, 13/00
characterised by the arrangement
self-contained rotary; with several evaporation circuits; with several condenser circuits; with cascade operation 3/00; 5/00; 6/00; 7/00
characterised by the refrigerant 9/00
using turbines 11/00
Sorption type 15/00, 17/00
Other types having a single mode of operation, using: evaporation without recovery; electric or magnetic effects; other effect 19/00; 21/00; 23/00
Combinations: of above modes of operation; of heating and refrigerating 25/00; 29/00
Heat pumps 30/00
Using special energy source 27/00
DETAILS, ARRANGEMENTS, OR COMPONENTS
Components: boilers, analysers, rectifiers; boiler-absorbers; absorbers, adsorbers; evaporators, condensers; subcoolers, desuper- heaters, superheaters 33/00; 35/00; 37/00; 39/00; 40/00
Arrangements
compressor arrangement; fluid circulation; separating or purifying gases 31/00; 41/00; 43/00
for charging or discharging refrigerant; for combating corrosion or deposits 45/00; 47/00
Mounting of control and safety devices 49/00

 F25C
PRODUCTION, WORKING, STORING, OR DISTRIBUTION OF ICE (frozen sweets, including ice-cream, their production A23G 9/00; concentrating solutions by removing frozen solvents B01D 9/04; purification of water by freezing C02F 1/22; refrigeration machines, plants, or systems F25B; solidification of gases or gaseous mixtures F25J; freeze-drying F26B)  [2]
 F25C

Note(s)

In this subclass, the following term is used with the meaning indicated:

  • "ice" means any frozen liquid and also covers frozen semiliquids or pasty substances.  [2]


 F25D
REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHER SUBCLASS (refrigerated showcases A47F 3/04; thermally-insulated vessels for domestic use A47J 41/00; refrigerated vehicles, see the appropriate subclasses of classes B60-B64; containers with thermal insulation in general B65D 81/38; heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants, or materials for the production of heat or cold by chemical reactions other than by combustion C09K 5/00; thermally-insulated vessels for liquefied or solidified gases F17C; air-conditioning or air-humidification F24F; refrigeration machines, plants, or systems F25B; cooling of instruments or comparable apparatus without refrigeration G12B; cooling of engines or pumps, see the relevant classes)
 F25D

Note(s)

  1. In this subclass, the following term is used with the meaning indicated:
    • "device" means an enclosed space to be cooled; such devices being associated either with refrigerating machinery, e.g. in a refrigerator, or with other cold sources, e.g. in an ice-box.
  2. Attention is drawn to Note (2) following the title of subclass F24F.  [5]
 F25D
Subclass index
DEVICES NOT ASSOCIATED WITH REFRIGERATING MACHINERY
Using cold air or water; other cold materials or bodies 1/00; 3/00
Using endothermic chemical reactions, or evaporation without recovery 5/00, 7/00
Other devices, combinations 9/00
DEVICES ASSOCIATED WITH REFRIGERATING MACHINERY: SELF-CONTAINED MOVABLE; STATIONARY; OTHER 11/00; 13/00; 15/00, 16/00
STRUCTURAL PARTS OR ARRANGEMENTS, OF GENERAL APPLICATION: GENERAL; DEFROSTING; HANDLING OF ARTICLES TO BE COOLED 23/00; 21/00; 25/00
CIRCULATING COOLING FLUID OR GAS; LIGHTING 17/00; 27/00
ARRANGEMENT OR MOUNTING: OF REFRIGERATION UNITS; OF CONTROL OR SAFETY DEVICES 19/00; 29/00
OTHER APPARATUS 31/00

 F25J
LIQUEFACTION, SOLIDIFICATION, OR SEPARATION OF GASES OR GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT (cryogenic pumps F04B 37/08; gas storage vessels, gas-holders F17; filling vessels with, or discharging from vessels, compressed, liquefied, or solidified gases F17C; refrigeration machines, plants, or systems F25B)