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REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHER SUBCLASS ( refrigerated show cases A47F 3/04 ; thermally-insulated vessels for domestic use A47J 41/00 ; refrigerated vehicles, see the appropriate subclasses of classes B60 to 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 and comparable apparatus without refrigeration G12B ; cooling of engines or pumps, see the relevant classes )
Definition statement
This subclass/group covers:

Refrigerators; cold rooms; ice-boxes; cooling or freezing apparatus not covered by any other subclass.

Relationship between large subject matter areas

F24F: "air-conditioning" means the supply of air to rooms or spaces by means which provide for the treatment of the air in at least two of the following ways: heating-cooling-any other kind of treatment, e.g. humidification.

Other household appliance fields are A47L (domestic washing), D06F (domestic laundry driers), F24B (domestic stoves).

References relevant to classification in this subclass
This subclass/group does not cover:
Refrigerated show cases
Thermally-insulated vessels for domestic use
Refrigerated vehicles
Containers with thermal insulation in general
Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants, or material for the production of heat or cold by chemical reactions other than by combustion
Cooling of engines or pumps
Thermally-insulated vessels for liquefied or solidified gases
Air-conditioning or air-humidification
Refrigeration machines, plants or systems
Production, working, storing or distribution of ice
Cooling of instruments and comparable apparatus without refrigeration
Informative references
Attention is drawn to the following places, which may be of interest for search:
Non-refrigerated containers specially adapted for transporting or storing living parts whilst preserving, e.g. cool boxes, blood bags or straws for seminal fluid
Cooling of specific food
Cooling of meat
Cooling of fruit
Cooling of ice cream
Cooling of food in general
Cooled garments
Casings for protecting, packaging, dispensing articles for surgery
Containers specially adapted for medical or pharmaceutical purposes
Cooling of protective clothing
Heat insulating devices, e.g. jackets for flasks, for laboratory
B01L11/02
Conveyers
Laptop cooling
Coin-freed or like apparatus with heating or cooling means
Computer/electronics cooling
Special rules of classification within this subclass

Devices not associated with refrigerating machinery: F25D 1/00-F25D 9/00

Devices associated with refrigerating machinery: F25D 11/00-F25D 16/00

Details or features of the devices covered by groups F25D 1/00 to F25D 16/00: F25D 17/00-F25D 31/00

Only classify a household appliance when a refrigerator or freezer is mentioned or when a refrigerator or freezer is shown in the drawings. Always circulate to the following household appliance fields:

A47L (domestic washing), D06F (domestic laundry driers), F24B (domestic stoves).

Glossary of terms
In this subclass/group, the following terms (or expressions) are 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.
{combined with heat exchangers}
Special rules of classification within this group

Classify in F25D 3/005 when only details of the heat exchanger are claimed.

When heat exchangers are combined with a cooling cycle: F25D 16/00.

When combined with or situated in refrigerators: F25D 11/006.

using ice, e.g. ice-boxes
Special rules of classification within this group

Not only use of ice, but also PCM's, i.e. Phase Change Materials, blue ice.

Movable containers
Special rules of classification within this group

Classify also in F25D 2303/08.

portable, i.e. adapted to be carried personally
Informative references
Attention is drawn to the following places, which may be of interest for search:
Lunch or picnic boxes
Drinking glasses
Thermally insulated vessels with heat or cold storing elements or material for kitchen equipment
Cooling bags for medical or therapeutic treatment of human body
Containers with thermal insulation in general
Materials undergoing a change of state from liquid to solid
Special arrangement or features of devices using cold storage material
Type of cooled receptacles
Using latent heat
Special rules of classification within this group

In case no details are claimed about cooling material, but only details about cooling box itself, no classification in F25D 3/08.

Special arrangements or features of devices using cold storage material are additionally classified in F25D 2303/08 and lower.

Features of the cooled receptacles are classified in F25D 2331/80 and lower.

using liquefied gases, e.g. liquid air { ( for cooling semiconductor devices H01L 23/445) }
Informative references
Attention is drawn to the following places, which may be of interest for search:
For cooling semiconductor devices
Special rules of classification within this group

Only cooled rooms, otherwise classify in F25B 19/005

Classify in F25D 3/12 when CO2 snow (dry ice) is claimed or mentioned.

with conveyers carrying articles to be cooled through the cooling space
Special rules of classification within this group
Conveyers in general
Stationary devices with conveyers carrying articles to be cooled through the cooling space
By conveyers
Using solidified gases with conveyers carrying articles to be cooled through the cooling space
using solidified gases, e.g. carbon-dioxide snow
Informative references
Attention is drawn to the following places, which may be of interest for search:
Solidiying carbon dioxide
Special rules of classification within this group

Classify in F25D 3/10 when liquid N2 is claimed or mentioned.

{Stationary devices with conveyers carrying articles to be cooled through the cooling space}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Conveyers in general
Stationary devices with conveyers carrying articles to be cooled through the cooling space
By conveyers
Using liquefied gases with conveyers carrying articles to be cooled through the cooling space
Devices using endothermic chemical reactions, e.g. using frigorific mixtures
Definition statement
This subclass/group covers:

Cooling by endothermic chemical reaction between substances triggered by for example rupturing/piercing a membrane.

Devices using evaporation effects without recovery of the vapour ( butter or cheese dishes with cooling devices A47G 19/26)
Definition statement
This subclass/group covers:

The cooling effect is derived from the evaporation of water, for which a supply of heat is required.

References relevant to classification in this group
This subclass/group does not cover:
Butter or cheese dishes with cooling devices
A23G19/26
Evaporative coolers
Vacuum coolers
Special rules of classification within this group

Classification of devices using evaporation effects without recovery of the vapour at ambient pressure.

Self-contained movable devices, e.g. domestic refrigerator
References relevant to classification in this group
This subclass/group does not cover:
Purses, travelling bags or baskets, suitcases
Hand carts
Containers for storage or transport of articles or materials
By forced circulation
{with cold storage accumulators}
Special rules of classification within this group

In case cold accumulators are arranged inside a refrigerator.

Cold storage accumulators in devices not associated with refrigerating machinery and emphasize on heat exchanger itself, classify in F25D 3/005.

When heat exchangers are combined with a cooling system, classify in F25D 16/00.

{with two or more evaporators}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Compression machines, plant, or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
{using primary and secondary refrigeration systems}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Machines, plant, or systems, using primary and secondary systems
{of the sorption cycle type}
Special rules of classification within this group

Documents with one cooling compartment and sorption cycle classify in F25D 11/027 and F25D 11/00.

with conveyers carrying articles to be cooled through the cooling space
Informative references
Attention is drawn to the following places, which may be of interest for search:
Conveyers in general
By conveyers
Using liquefied gases with conveyers carrying articles to be cooled through the cooling space
Using solidified gases with conveyers carrying articles to be cooled through the cooling space
Devices not covered by group F25D 11/00 or F25D 13/00 , e.g. non-self-contained movable devices
Definition statement
This subclass/group covers:

Products cooled by a cooling system at a remote place;

Devices for freezing of pipes for forming a frozen ice plug in a section of a pipe to be repaired.

Movable devices implies also refrigerators.

Special rules of classification within this group

Classify also in F25D 17/02 in case of cooling by circulating a coolant.

Classify also in F25D 17/06 in case of cooling by cold air.

Devices using a combination of a cooling mode associated with refrigerating machinery with a cooling mode not associated with refrigerating machinery
Special rules of classification within this group

When heat exchangers are combined with a cooling system, classify in F25D 16/00.

In case cold accumulators are arranged inside a refrigerator, classify in F25D 11/006.

Cold storage accumulators in devices not associated with refrigerating machinery and emphasize on heat exchanger itself, classify in F25D 3/005.

{in cold rooms}
Special rules of classification within this group

Classification in F25B 25/005 when primary refrigeration cycle is important.

for circulating air, e.g. by convection
Definition statement
This subclass/group covers:

Circulation of air by natural convection.

References relevant to classification in this group
This subclass/group does not cover:

Forced circulation of air is classified in F25D 17/06.

{Air treating means within refrigerated spaces (air conditioning in general F24F) }
Informative references
Attention is drawn to the following places, which may be of interest for search:
Preservation or chemical ripening of fruit or vegetables
Preservation of food in general
Disinfection, sterilization or deodorization of air
Filtering material for liquid or gaseous fluids
Treating air flowing to refrigeration compartments
Ion generating apparatus
Special rules of classification within this group

Treating air flowing to refrigeration compartments by purification (dehumidification, humidification, deodorizing, ozone generator and uv-lamp) is additionally classified in F25D 2317/041 and lower.

Treating air flowing to refrigeration compartments by creating a vacuum in a storage compartment to store products under vacuum is additionally classified in F25D 2317/043. Vacuum cooling is classified in F25D 31/00.

{Air flow control arrangements}
Definition statement
This subclass/group covers:

Air dampers; Air valves.

by forced circulation
Informative references
Attention is drawn to the following places, which may be of interest for search:
Ventilator details
Special arrangements or features of forced air circulation within refrigerated spaces
Air flow control arrangements
Special rules of classification within this group

Circulation of air by natural convection is classified in F25D 17/04.

Control of air circulation is also classified in F25D 17/06.

Special arrangements or features of forced air circulation within refrigerated spaces are additionally classified in F25D 17/06 and lower.

Additionally classify in F25D 21/002 in case of defrost control.

using ducts
Definition statement
This subclass/group covers:

Ducts for cooling by radiation, i.e. indirect cooling.

Arrangement or mounting of refrigeration units with respect to devices {or objects to be refrigerated, e.g. infra-red detectors}
Definition statement
This subclass/group covers:

Mounting of complete refrigeration units.

References relevant to classification in this group
This subclass/group does not cover:
Mounting of components of refrigerating machinery
{Defroster control}
References relevant to classification in this group
This subclass/group does not cover:

Classification in F25B 47/02 when frost is removed by heat of the refrigeration cycle.

Removing frost ( defrosting cycles F25B 47/02)
References relevant to classification in this group
This subclass/group does not cover:

Classification in F25B 47/02 when frost is removed by heat of the refrigeration cycle.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Alternate defrosting
Collecting or removing condensed and defrost water; Drip trays
References relevant to classification in this group
This subclass/group does not cover:
Passenger or goods spaces characterized by condensed liquid drainage means
Removing condensate in air-conditioning
Collecting and removing condensate for heat-exchangers
Informative references
Attention is drawn to the following places, which may be of interest for search:
Cooling refrigerating machinery
Special arrangements or features of collecting condense or defrost water
Special rules of classification within this group

Special arrangements or features of collecting condense or defrost water are additionally classified in F25D 21/14 and lower.

{for cooling refrigerating machinery}
Definition statement
This subclass/group covers:

Cooling of compressor and condenser of refrigerated enclosures.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Cooling of compressor or motor
Condensers with refrigerant heat exchange tubes positioned inside or around a vessel containing water or pcm to cool the refrigerant gas
Water-cooled condensers
Special arrangements or details for cooling refrigerating machinery
{for mounting refrigerating machinery components}
Definition statement
This subclass/group covers:

Mounting of components of refrigerating machinery.

References relevant to classification in this group
This subclass/group does not cover:

Mounting of complete refrigeration units: F25D 19/00.

Special rules of classification within this group

Special arrangements or features for cooling refrigerating machinery are additionally classified in F25D23/0C2 and lower.

Doors; Covers (F25D 23/08 takes precedence ) { locks or fastenings E05B 65/0042}
References relevant to classification in this group
This subclass/group does not cover:
Transparent doors
Details not related to door itself, e.g. hinges, handles, actuators, dispensers are classified in
Parts formed wholly or mainly of plastics materials
Informative references
Attention is drawn to the following places, which may be of interest for search:
Night covers display case
Locks or fastenings
Doors
Special arrangements or details of doors or covers not otherwise covered
Special rules of classification within this group

F25D 23/08 takes precedence.

French doors are additionally classified in F25D 2323/021;

Doors that can be pivoted either left-handed or right-handed are additionally classified in F25D 2323/022.

Door in door constructions are additionally classified in F25D 2323/023.

{Details}
References relevant to classification in this group
This subclass/group does not cover:

Details of refrigerator doors are classified in F25D 23/02.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Special rules of classification within this group

All details not related to refrigerator door itself, e.g. hinges, handles, actuators, dispensers are classified in F25D 23/028.

Door hinges are additionally classified in F25D 2323/024.

Walls (F25D 23/08 takes precedence; containers with thermal insulation B65D 81/38)
Informative references
Attention is drawn to the following places, which may be of interest for search:
Details of cabinets, racks or shelf units
Shaping or joining of plastics; Shaping of substances in a plastic state, in general; after-treatment of shaped products, e.g. repairing
Foaming
Extrusion molding
Production of refrigerators
Insulation, layered products
Containers with thermal insulation
Insulation, vacuum panel
Supports for pipes, cables or protective tubing
Thermal insulation in general
Supports for pipes or cables inside other pipes or sleeves
Insulation
Collapsible walls
Inflatable walls
Special rules of classification within this group

F25D 23/08 takes precedence.

Insulation (with respect to heat or sound) is additionally classified in F25D 2201/00.

Collapsible walls are additionally classified in F25D 2323/061.

Inflatable walls are additionally classified in F25D 2323/062.

{Sealing strips}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Magnetic gaskets
{Water cooler}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Filtering devices
Dispensing beverages
Ice dispenser
Refrigerator doors; covers
Special arrangements or details of the water filter for the water/ice dispenser
Special arrangements or details of the water tank for the water/ice dispenser
Special rules of classification within this group

Additionally classify in:

F25D 23/02 when details of the door are claimed.

F25C 5/005 when details of an ice dispenser are claimed.

F25D 2323/121 when special arrangements or details of the water filter are claimed.

F25D 2323/122 when special arrangements or details of the water tank are claimed.

Charging, supporting, and discharging the articles to be cooled
Special rules of classification within this group

Additionally classify in:

F25D 2331/80: Type of cooled receptacles.

by shelves
Informative references
Attention is drawn to the following places, which may be of interest for search:
Drawers, shelves
Show stands, hangers or shelves
Special arrangements or features of shelves with several possible configurations
Special arrangements or features of shelves made of glass or ceramic
Special arrangements or features of shelves made of wires
Type of cooled receptacles
Special rules of classification within this group

Additionally classify in:

F25D 2325/021: Special arrangements or features of shelves with several possible configurations

F25D 2325/022: Special arrangements or features of shelves made of glass or ceramic

F25D 2325/023: Special arrangements or features of shelves made of wires

F25D 2331/80: Type of cooled receptacles.

{Baskets}
Definition statement
This subclass/group covers:

Wire baskets.

{Drawers}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Drawers
Type of cooled receptacles
Special rules of classification within this group

Additionally classify drawers opened by sliding doors in F25D 23/021.

by conveyers ( in general B65G)
Informative references
Attention is drawn to the following places, which may be of interest for search:
Stationary devices with conveyers carrying articles to be cooled through the cooling space
Using liquefied gases with conveyers carrying articles to be cooled through the cooling space
Using solidified gases with conveyers carrying articles to be cooled through the cooling space
Conveyers in general
Special rules of classification within this group

Shelves or drawers which can be adjusted in height are classified in A47B 57/06.

Lighting arrangements ( in general F21)
Definition statement
This subclass/group covers:

Lighting arrangements for lighting cooling enclosures, both inside and outside the enclosure.

Relationship between large subject matter areas

Lighting in general: F21.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Lighting devices
Circuit arrangements for electric light sources
Special arrangements or features for lighting arrangements on the external side of the refrigerator, freezer or cooling box
Arrangement or mounting of control or safety devices
Informative references
Attention is drawn to the following places, which may be of interest for search:
Arrangement or mounting of control or safety devices
Control issues F25D
Means for sensing or measuring F25D; Sensors therefor F25D
Telecontrol of temperature
Inventory
Special rules of classification within this group

F25D 17/06 takes precedence;

F25D 21/00 takes precedence;

F25B 49/02 takes precedence, classify in F25D 29/00 to distinguish a refrigerator over a refrigeration cycle.

F25B 5/00 takes precedence, classify in F25D 29/00 or F25D 11/022 to distinguish a refrigerator over a refrigeration cycle.

Additional classification of control issues in F25D 2600/00.

Additional classification of means for sensing or measuring and sensors therefor in F25D 2700/00.

{Mounting of control devices}
Definition statement
This subclass/group covers:

Mounting of control devices; Mounting of sensors to refrigeration devices

Special rules of classification within this group

Mounting of sensors to refrigeration devices are classified in F25D 29/005/CCA.

Other cooling or freezing apparatus
Definition statement
This subclass/group covers:

Cooling by creating a vacuum.

References relevant to classification in this group
This subclass/group does not cover:

Storing of products in a refrigerated enclosure under vacuum: F25D 2317/043.

{Liquid coolers, e.g. beverage cooler ( receptacle coolers F25D 31/006) }
References relevant to classification in this group
This subclass/group does not cover:
Repectacle coolers
Informative references
Attention is drawn to the following places, which may be of interest for search:
Cooling of liquids with pour-throughs
{specially adapted for cooling receptacles, e.g. tanks}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Type of cooled receptacles
{Bottles or cans}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Type of cooled receptacles
{Drinking glasses}
Definition statement
This subclass/group covers:

Pre-chilling of glasses.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Type of cooled receptacles; Glasses
This page is owned by Office of Patent Classification.
Last Modified: 10/11/2013