IPC Classification

Class code (prefix) Descriptions Number of results
F25B 1/00 Compression machines, plants or systems with non-reversible cycle
F25B 1/02 Compression machines, plants or systems with non-reversible cycle with compressor of reciprocating-piston type
F25B 1/04 Compression machines, plants or systems with non-reversible cycle with compressor of rotary type
F25B 1/06 Compression machines, plants or systems with non-reversible cycle with compressor of jet type, e.g. using liquid under pressure
F25B 1/08 Compression machines, plants or systems with non-reversible cycle with compressor of jet type, e.g. using liquid under pressure using vapour under pressure
F25B 1/10 Compression machines, plants or systems with non-reversible cycle with multi-stage compression
F25B 1/047 Compression machines, plants or systems with non-reversible cycle with compressor of rotary type of screw type
F25B 1/053 Compression machines, plants or systems with non-reversible cycle with compressor of rotary type of turbine type
F25B 3/00 Self-contained rotary compression machines, i.e. with compressor, condenser and evaporator rotating as a single unit
F25B 5/00 Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
F25B 5/02 Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
F25B 5/04 Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in series
F25B 6/00 Compression machines, plants or systems, with several condenser circuits
F25B 6/02 Compression machines, plants or systems, with several condenser circuits arranged in parallel
F25B 6/04 Compression machines, plants or systems, with several condenser circuits arranged in series
F25B 7/00 Compression 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 9/00 Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
F25B 9/02 Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using vortex effect
F25B 9/04 Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using vortex effect using vortex effect
F25B 9/06 Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using expanders
F25B 9/08 Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using ejectors
F25B 9/10 Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point with several cooling stages
F25B 9/12 Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using 3He-4He dilution
F25B 9/14 Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
F25B 11/00 Compression machines, plants or systems, using turbines, e.g. gas turbines
F25B 11/02 Compression machines, plants or systems, using turbines, e.g. gas turbines as expanders
F25B 11/04 Compression machines, plants or systems, using turbines, e.g. gas turbines as expanders centrifugal type
F25B 13/00 Compression machines, plants or systems, with reversible cycle
F25B 15/00 Sorption machines, plants or systems, operating continuously, e.g. absorption type
F25B 15/02 Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
F25B 15/04 Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being ammonia evaporated from aqueous solution
F25B 15/06 Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
F25B 15/08 Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being sulfuric acid
F25B 15/09 Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being hydrogen desorbed from a hydride
F25B 15/10 Sorption machines, plants or systems, operating continuously, e.g. absorption type with inert gas
F25B 15/12 Sorption machines, plants or systems, operating continuously, e.g. absorption type with resorber
F25B 15/14 Sorption machines, plants or systems, operating continuously, e.g. absorption type using osmosis
F25B 15/16 Sorption machines, plants or systems, operating continuously, e.g. absorption type using desorption cycle
F25B 17/00 Sorption machines, plants or systems, operating intermittently, e.g. absorption or adsorption type
F25B 17/02 Sorption machines, plants or systems, operating intermittently, e.g. absorption or adsorption type the absorbent or adsorbent being a liquid, e.g. brine
F25B 17/04 Sorption machines, plants or systems, operating intermittently, e.g. absorption or adsorption type the absorbent or adsorbent being a liquid, e.g. brine with two or more boilers operating alternately
F25B 17/06 Sorption machines, plants or systems, operating intermittently, e.g. absorption or adsorption type the absorbent or adsorbent being a liquid, e.g. brine with the boiler and evaporator built-up as a unit in a tiltable or revolving arrangement
F25B 17/08 Sorption machines, plants or systems, operating intermittently, e.g. absorption or adsorption type the absorbent or adsorbent being a solid, e.g. salt
F25B 17/10 Sorption machines, plants or systems, operating intermittently, e.g. absorption or adsorption type using the endothermic solution of salt
F25B 17/12 Sorption machines, plants or systems, operating intermittently, e.g. absorption or adsorption type using desorption of hydrogen from a hydride
F25B 19/00 Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour
F25B 19/02 Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour using fluid jet, e.g. of steam
F25B 19/04 Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour using fluid jet, e.g. of steam using liquid jet, e.g. of water
F25B 21/00 Machines, plants or systems, using electric or magnetic effects
F25B 21/02 Machines, plants or systems, using electric or magnetic effects using Nernst-Ettinghausen effect
F25B 21/04 Machines, plants or systems, using electric or magnetic effects using Nernst-Ettinghausen effect reversible
F25B 23/00 Machines, plants or systems, with a single mode of operation not covered by groups , e.g. using selective radiation effect
F25B 25/00 Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups
F25B 25/02 Compression-sorption machines, plants, or systems
F25B 27/00 Machines, plants or systems, using particular sources of energy
F25B 27/02 Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
F25B 29/00 Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
F25B 30/00 Heat pumps
F25B 30/02 Heat pumps of the compression type
F25B 30/04 Heat pumps of the sorption type
F25B 30/06 Heat pumps characterised by the source of low potential heat
F25B 31/00 Compressor arrangements
F25B 31/02 Compressor arrangements of motor-compressor units
F25B 33/00 Boilers; Analysers; Rectifiers
F25B 35/00 Boiler-absorbers, i.e. boilers usable for absorption or adsorption
F25B 35/02 Boiler-absorbers, i.e. boilers usable for absorption or adsorption using a liquid as sorbent, e.g. brine
F25B 35/04 Boiler-absorbers, i.e. boilers usable for absorption or adsorption using a solid as sorbent
F25B 37/00 Absorbers; Adsorbers
F25B 39/00 Evaporators; Condensers
F25B 39/02 Evaporators
F25B 39/04 Condensers
F25B 40/00 Subcoolers, desuperheaters or superheaters
F25B 40/02 Subcoolers
F25B 40/04 Desuperheaters
F25B 40/06 Superheaters
F25B 41/00 Fluid-circulation arrangements
F25B 41/02 Fluid-circulation arrangements, e.g. for transferring liquid from evaporator to boiler using electro-osmosis
F25B 41/04 Disposition of valves
F25B 41/06 Flow restrictors, e.g. capillary tubes; Disposition thereof
F25B 41/10 Fluid-circulation arrangements using electro-osmosis
F25B 41/20 Disposition of valves, e.g. of on-off valves or flow control valves
F25B 41/22 Disposition of valves, e.g. of on-off valves or flow control valves between evaporator and compressor
F25B 41/24 Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
F25B 41/26 Disposition of valves, e.g. of on-off valves or flow control valves of fluid flow reversing valves
F25B 41/28 Disposition of valves, e.g. of on-off valves or flow control valves specially adapted for sorption cycles
F25B 41/30 Expansion means; Dispositions thereof
F25B 41/31 Expansion valves
F25B 41/32 Expansion valves having flow rate limiting means other than the valve member, e.g. having bypass orifices in the valve body
F25B 41/33 Expansion valves with the valve member being actuated by the fluid pressure, e.g. by the pressure of the refrigerant
F25B 41/34 Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
F25B 41/35 Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by rotary motors, e.g. by stepping motors
F25B 41/36 Expansion valves with the valve member being actuated by bimetal elements or shape-memory elements influenced by fluids, e.g. by the refrigerant
F25B 41/37 Capillary tubes
F25B 41/38 Expansion means; Dispositions thereof specially adapted for reversible cycles, e.g. bidirectional expansion restrictors
F25B 41/39 Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator
F25B 41/40 Fluid line arrangements
F25B 41/42 Arrangements for diverging or converging flows, e.g. branch lines or junctions
F25B 41/45 Arrangements for diverging or converging flows, e.g. branch lines or junctions for flow control on the upstream side of the diverging point, e.g. with spiral structure for generating turbulence
F25B 41/48 Arrangements for diverging or converging flows, e.g. branch lines or junctions for flow path resistance control on the downstream side of the diverging point, e.g. by an orifice
F25B 41/315 Expansion valves actuated by floats
F25B 41/325 Expansion valves having two or more valve members
F25B 41/335 Expansion valves with the valve member being actuated by the fluid pressure, e.g. by the pressure of the refrigerant via diaphragms
F25B 41/345 Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by solenoids
F25B 41/355 Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by electric heating of bimetal elements, shape memory elements or heat expanding elements
F25B 41/375 Capillary tubes characterised by a variable restriction, e.g. restrictors made of shape memory alloy
F25B 41/385 Dispositions with two or more expansion means arranged in parallel on a refrigerant line leading to the same evaporator
F25B 43/00 Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
F25B 43/02 Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
F25B 43/04 Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for withdrawing non-condensible gases
F25B 45/00 Arrangements for charging or discharging refrigerant
F25B 47/00 Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
F25B 47/02 Defrosting cycles
F25B 49/00 Arrangement or mounting of control or safety devices
F25B 49/02 Arrangement or mounting of control or safety devices for compression type machines, plants or systems
F25B 49/04 Arrangement or mounting of control or safety devices for sorption type machines, plants or systems