| F | SK | SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING |
| F25 | KL | REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES |
| F25D | UKL | 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) |
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| F25D 1/00 | HGR | Devices using naturally-cold air or water |
| F25D 1/02 | UGR1 | | . | using naturally-cold water, e.g. household-tap water |
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| F25D 3/00 | HGR | Devices using other cold materials; Devices using cold-storage bodies |
| F25D 3/02 | UGR1 | | . | using ice, e.g. ice-boxes |
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| F25D 3/04 | UGR2 | |
| F25D 3/06 | UGR2 | |
| F25D 3/08 | UGR3 | | . . . | portable, i.e. adapted to be carried personally |
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| F25D 3/10 | UGR1 | | . | using liquefied gases, e.g. liquid air |
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| F25D 3/11 | UGR2 | | . . | with conveyers carrying articles to be cooled through the cooling space [4] |
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| F25D 3/12 | UGR1 | | . | using solidified gases, e.g. carbon-dioxide snow |
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| F25D 3/14 | UGR2 | | . . | portable, i.e. adapted to be carried personally |
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| F25D 5/00 | HGR | Devices using endothermic chemical reactions, e.g. using frigorific mixtures |
| F25D 5/02 | UGR1 | | . | portable, i.e. adapted to be carried personally |
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| F25D 7/00 | HGR | Devices using evaporation effects without recovery of the vapour (butter or cheese dishes with cooling devices A47G 19/26) |
| F25D 9/00 | HGR | Devices not covered by groups F25D 1/00-F25D 7/00; Combinations of devices covered by two or more of the groups F25D 1/00-F25D 7/00 |
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| F25D 11/00 | HGR | Self-contained movable devices, e.g. domestic refrigerator |
| F25D 11/02 | UGR1 | | . | with cooling compartments at different temperatures |
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| F25D 11/04 | UGR1 | | . | specially adapted for storing deep-frozen articles (F25D 11/02 takes precedence) |
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| F25D 13/00 | HGR | Stationary devices, e.g. cold rooms |
| F25D 13/02 | UGR1 | | . | with several cooling compartments, e.g. refrigerated locker systems |
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| F25D 13/04 | UGR2 | | . . | the compartments being at different temperatures |
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| F25D 13/06 | UGR1 | | . | with conveyers carrying articles to be cooled through the cooling space |
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| F25D 15/00 | HGR | Devices not covered by group F25D 11/00 or F25D 13/00, e.g. non-self-contained movable devices |
| F25D 16/00 | ZWE |
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| F25D 16/00 | HGR | Devices using a combination of a cooling mode associated with refrigerating machinery with a cooling mode not associated with refrigerating machinery [5] |
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| F25D 17/00 | HGR | Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces [3] |
| F25D 17/02 | UGR1 | | . | for circulating liquids, e.g. brine |
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| F25D 17/04 | UGR1 | | . | for circulating gas, e.g. by natural convection [3] |
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| F25D 17/06 | UGR2 | |
| F25D 17/08 | UGR3 | |
| F25D 19/00 | HGR | Arrangement or mounting of refrigeration units with respect to devices |
| F25D 19/02 | UGR1 | |
| F25D 19/04 | UGR1 | | . | with more than one refrigeration unit |
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| F25D 21/00 | HGR | Defrosting; Preventing frosting; Removing condensed or defrost water (removing ice or water from heat-exchange apparatus in general F28F 17/00; heating arrangements specially adapted for transparent or reflecting areas H05B 3/84) |
| F25D 21/02 | UGR1 | | . | Detecting the presence of frost or condensate |
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| F25D 21/04 | UGR1 | | . | Preventing the formation of frost or condensate |
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| F25D 21/06 | UGR1 | |
| F25D 21/08 | UGR2 | |
| F25D 21/10 | UGR2 | | . . | by spraying with fluid |
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| F25D 21/12 | UGR2 | | . . | by hot-fluid circulating system separate from the refrigerant system |
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| F25D 21/14 | UGR1 | | . | Collecting or removing condensed and defrost water; Drip trays |
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| F25D 23/00 | HGR | General constructional features (F25D 21/00 takes precedence) |
| F25D 23/02 | UGR1 | |
| F25D 23/04 | UGR2 | | . . | with special compartments, e.g. butter conditioners |
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| F25D 23/06 | UGR1 | |
| F25D 23/08 | UGR1 | | . | Parts formed wholly or mainly of plastics materials |
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| F25D 23/10 | UGR1 | | . | Arrangements for mounting in particular locations, e.g. for built-in type, for corner type |
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| F25D 23/12 | UGR1 | | . | Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove |
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| F25D 25/00 | HGR | Charging, supporting, or discharging the articles to be cooled |
| F25D 25/02 | UGR1 | |
| F25D 25/04 | UGR1 | | . | by conveyers (in general B65G) |
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| F25D 27/00 | HGR | Lighting arrangements (in general F21) |
| F25D 29/00 | HGR | Arrangement or mounting of control or safety devices |
| F25D 31/00 | ZWE |
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| F25D 31/00 | HGR | Other cooling or freezing apparatus |