F25BLevel 3

REFRIGERATION MACHINES, PLANTS OR SYSTEMS

**Definition:** This place covers:

Refrigeration machines, plants or systems; combined heating and refrigeration systems; heat-pump systems.

Cold production at temperatures below ambient, not transportation of heat.

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F25B 1/00Compression machines, plants or systems

F25B 11/00Compression machines, plants or systems, using turbines, e.g. gas turbines

F25B 13/00Compression machines, plants or systems, with reversible cycle

F25B 15/00Sorption machines, plants or systems

F25B 17/00Sorption machines, plants or systems, operating intermittently, e.g. absorption or adsorption type

F25B 19/00Machines, plants or systems, with a single mode of operation, not covered by groups

F25B 21/00Machines, plants or systems, using electric or magnetic effects

F25B 23/00Machines, plants or systems, with a single mode of operation not covered by groups

F25B 2300/00Indexing scheme associated with groups

F25B 2309/00Gas cycle refrigeration machines

F25B 2313/00Compression machines, plants or systems with reversible cycle not otherwise provided for

F25B 2315/00Sorption refrigeration cycles or details thereof

F25B 2321/00Details of machines, plants or systems, using electric or magnetic effects

F25B 2327/00Refrigeration system using an engine for driving a compressor

F25B 2333/00Details of boilers

F25B 2339/00Details of evaporators

F25B 2341/00Details of ejectors not being used as compression device

F25B 2345/00Details for charging or discharging refrigerants

F25B 2347/00Details for preventing or removing deposits or corrosion

F25B 2400/00General 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 25/00Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups

F25B 2500/00Problems to be solved

F25B 2600/00Control issues

F25B 27/00Machines, plants or systems, using particular sources of energy

F25B 2700/00Sensing or detecting of parameters

F25B 29/00Combined heating and refrigeration systems, e.g. operating alternately or simultaneously

F25B 3/00Self-contained rotary compression machines, i.e. with compressor, condenser and evaporator rotating as a single unit

F25B 30/00Heat pumps

F25B 31/00Component parts or details

F25B 33/00Boilers

F25B 35/00Boiler-absorbers, i.e. boilers usable for absorption or adsorption

F25B 37/00Absorbers

F25B 39/00Evaporators

F25B 40/00Subcoolers, desuperheaters or superheaters

F25B 41/00Fluid-circulation arrangements

F25B 43/00Arrangements for separating or purifying gases or liquids

F25B 45/00Arrangements for charging or discharging refrigerant

F25B 47/00Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass

F25B 49/00Arrangement or mounting of control or safety devices

F25B 5/00Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity

F25B 6/00Compression machines, plants or systems, with several condenser circuits

F25B 7/00Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit

F25B 9/00Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point

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