F
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
 F01 - 
F04
Subsection index
MACHINES
positive displacement
rotary or oscillating piston
liquid and elastic fluid or elastic fluidF01C
liquid onlyF04C
reciprocating piston or other
liquid and elastic fluid or elastic fluidF01B
liquid onlyF04B
non-positive displacement
liquid and elastic fluid or elastic fluidF01D
liquid onlyF03B
ENGINES
positive displacement
rotary or oscillating piston
liquid and elastic fluid or elastic fluidF01C
liquid onlyF03C
reciprocating piston or other
liquid and elastic fluid or elastic fluidF01B
liquid onlyF03C
non-positive displacement
liquid and elastic fluid or elastic fluidF01D
liquid onlyF03B
PUMPS
positive displacement
rotary or oscillating pistonF04C
reciprocating piston or otherF04B
non-positive displacementF04D
  
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)

Attention is drawn to Note (2) following the title of subclass F24F.   [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
 F25B 1/00 - 
F25B 13/00
Compression machines, plant, or systems
P:120 F25B 1/00
Compression machines, plant or systems with non-reversible cycle (F25B 3/00, F25B 5/00, F25B 6/00, F25B 7/00, F25B 9/00 take precedence)  [5]
 F25B 1/02
·  with compressor of reciprocating-piston type (F25B 1/10 takes precedence)
 F25B 1/04
·  with compressor of rotary type (F25B 1/10 takes precedence)
 F25B 1/06
·  with compressor of jet type, e.g. using liquid under pressure (F25B 1/10 takes precedence)
 F25B 1/10
·  with multi-stage compression (with cascade operation F25B 7/00)
P:60 F25B 3/00
Self-contained rotary compression machines, i.e. with compressor, condenser, and evaporator rotating as a single unit
P:90 F25B 5/00
Compression machines, plant, or systems, with several evaporator circuits, e.g. for varying refrigerating capacity (with cascade operation F25B 7/00)
P:100 F25B 6/00
Compression machines, plant, or systems, with several condenser circuits  [5]
P:80 F25B 7/00
Compression machines, plant, 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 takes precedence)
P:50 F25B 9/00
Compression machines, plant, or systems, in which the refrigerant is air or other gas of low boiling point
 F25B 9/02
·  using Joule-Thompson effect; using vortex effect
 F25B 9/06
·  using expanders (F25B 9/10 takes precedence)  [5]
 F25B 9/08
·  using ejectors (F25B 9/10 takes precedence)  [5]
 F25B 9/10
·  with several cooling stages  [5]
 F25B 9/12
·  using 3He-4He dilution  [5]
 F25B 9/14
·  characterised by the cycle used, e.g. Stirling cycle  [5]
P:70 F25B 11/00
Compression machines, plant, or systems, using turbines, e.g. gas turbines
 F25B 11/02
·  as expanders (F25B 9/06 takes precedence)  [5]
P:110 F25B 13/00
Compression machines, plant, or systems, with reversible cycle (defrosting cycles F25B 47/02)
 F25B 15/00 - 
F25B 17/00
Sorption machines, plant, or systems
P:140 F25B 15/00
Sorption machines, plant, or systems, operating continuously, e.g. absorption type
 F25B 15/02
·  without inert gas (F25B 15/12, F25B 15/14, F25B 15/16 take precedence)
 F25B 15/10
·  with inert gas (F25B 15/12, F25B 15/14, F25B 15/16 take precedence)
 F25B 15/12
·  with resorber (F25B 15/14 takes precedence)
 F25B 15/14
·  using osmosis
 F25B 15/16
·  using desorption cycle
P:130 F25B 17/00
Sorption machines, plant, or systems, operating intermittently, e.g. absorption or adsorption type
 F25B 19/00 - 
F25B 23/00
Machines, plant, or systems, with a single mode of operation, not covered by groups F25B 1/00-F25B 17/00
P:150 F25B 19/00
Machines, plant, or systems, using evaporation of a refrigerant but without recovery of the vapour
P:40 F25B 21/00
Machines, plant, or systems, using electric or magnetic effects
 F25B 21/02
·  using Peltier effect; using Nernst-Ettinghausen effect (thermoelectric elements H01L 35/00, H01L 37/00)
P:160 F25B 23/00
Machines, plant, or systems, with a single mode of operation not covered by groups F25B 1/00-F25B 21/00, e.g. using selective radiation effect
   
P:30 F25B 25/00
Machines, plant, or systems, using a combination of modes of operation covered by two or more of the groups F25B 1/00-F25B 23/00 (combinations of two or more modes of operation covered by a single main group, see the relevant group)
P:0 F25B 27/00
Machines, plant, or systems, using particular sources of energy (F25B 30/00 takes precedence)
 F25B 27/02
·  using waste heat, e.g. from internal-combustion engines
P:10 F25B 29/00
Combined heating and refrigeration systems, e.g. operating alternately or simultaneously  [5]
P:20 F25B 30/00
Heat pumps  [5]
 F25B 30/00

Note(s)

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 31/00 - 
F25B 49/00
Component parts or details
P:210 F25B 31/00
Compressor arrangements (compressors per se F04)
P:240 F25B 33/00
Boilers; Analysers; Rectifiers (boiler-absorbers F25B 35/00)
P:230 F25B 35/00
Boiler-absorbers, i.e. boilers usable for absorption or adsorption
P:250 F25B 37/00
Absorbers; Adsorbers (boiler-absorbers F25B 35/00; separating processes involving the treatment of liquids with solid sorbents B01D 15/00; separation of gases or vapours by adsorption B01D 53/02; separation of gases or vapours by absorption B01D 53/14; investigating using adsorption or absorption G01N 30/00)
P:260 F25B 39/00
Evaporators; Condensers
 F25B 39/02
·  Evaporators
 F25B 39/04
·  Condensers
P:200 F25B 40/00
Subcoolers, desuperheaters or superheaters  [5]
P:220 F25B 41/00
Fluid-circulation arrangements, e.g. for transferring liquid from evaporator to boiler (pumps per se, sealings therefor F04)
 F25B 41/04
·  Disposition of valves (valves per se F16K)
 F25B 41/06
·  Flow restrictors, e.g. capillary tubes; Disposition thereof
P:180 F25B 43/00
Arrangements for separating or purifying gases or liquids (in analysers or rectifiers F25B 33/00); Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat (F25B 40/00 takes precedence)  [5]
 F25B 43/02
·  for separating lubricants from the refrigerant
 F25B 43/04
·  for withdrawing non-condensible gases
P:270 F25B 45/00
Arrangements for charging or discharging refrigerant
P:190 F25B 47/00
Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
 F25B 47/02
·  Defrosting cycles  [5]
P:170 F25B 49/00
Arrangement or mounting of control or safety devices (testing refrigerators G01M; control in general G05)
 F25B 49/02
·  for compression type machines, plant or systems  [5]