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Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised

CPC
COOPERATIVE PATENT CLASSIFICATION
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REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS (
{
evaporation or evaporation apparatus for physical or chemical purposes, e.g. evaporation of liquids for gas phase reactions B01B 1/005
}
; 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)
NOTE
-
Attention is drawn to Note (2) following the title of subclass F24F.

When classifying heat pump circuits or systems, groups F25B 1/00 to F25B 25/00 and F25B 29/00 take precedence over group F25B 30/00.

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Guide Heading:
Compression machines, plant, or systems
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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)
F25B 1/005
.
{
of the single unit type (F25B 1/10 takes precedence)
}
F25B 1/02
.
with compressor of reciprocating-piston type (
{
F25B 1/005,
}
F25B 1/10 take precedence)
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.
with compressor of rotary type (
{
F25B 1/005,
}
F25B 1/10 take precedence)
F25B 1/047
. .
of screw type
F25B 1/053
. .
of turbine type
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.
with compressor of jet type, e.g. using liquid under pressure (
{
F25B 1/005,
}
F25B 1/10 take precedence)
F25B 1/08
. .
using vapour under pressure
F25B 1/10
.
with multi-stage compression (with cascade operation F25B 7/00)
F25B 3/00
Self-contained rotary compression machines, i.e. with compressor, condenser, and evaporator rotating as a single unit
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Compression machines, plant, or systems, with several evaporator circuits, e.g. for varying refrigerating capacity (with cascade operation F25B 7/00)
F25B 5/02
.
arranged in parallel
F25B 5/04
.
arranged in series
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Compression machines, plant, or systems, with several condenser circuits
F25B 6/02
.
arranged in parallel
F25B 6/04
.
arranged in series
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)
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Compression machines, plant, or systems, in which the refrigerant is air or other gas of low boiling point
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F25B 9/002
.
{
characterised by the refrigerant
}
F25B 9/004
. .
{
the refrigerant being air (air conditioning F24F)
}
. .
{
the refrigerant containing more than one component (F25B 9/004 takes precedence; refrigerant materials per se C09K 5/00)
}
F25B 9/008
. .
{
the refrigerant being carbon dioxide
}
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F25B 9/02
.
using Joule-Thompson effect; using vortex effect
F25B 9/04
. .
using vortex effect
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.
using expanders (F25B 9/10 takes precedence)
F25B 9/065
. .
{
using pressurised gas jets
}
.
using ejectors (F25B 9/10 takes precedence)
F25B 9/10
.
with several cooling stages
F25B 9/12
.
using 3He-4He dilution
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.
characterised by the cycle used, e.g. Stirling cycle
{
(engine plants with Vuilleumier-type cycles F02G 1/0445)
}
. .
{
pulse-tube cycle
}
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Compression machines, plant, or systems, using turbines, e.g. gas turbines
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F25B 11/02
.
as expanders (F25B 9/06 takes precedence)
F25B 11/04
. .
centrifugal type
Compression machines, plant, or systems withreversible cycle (defrosting cycles F25B 47/02)
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Guide Heading:
Sorption machines, plant, or systems
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Sorption machines, plant, or systems, operating continuously, e.g. absorption type
F25B 15/002
.
{
using the endothermic solution of salt
}
F25B 15/004
.
{
of rotary type
}
F25B 15/006
.
{
with cascade operation
}
F25B 15/008
.
{
with multi-stage operation (F25B 15/006 takes precedence)
}
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F25B 15/02
.
without inert gas (
{
F25B 15/004, F25B 15/006, F25B 15/008
}
, F25B 15/12, F25B 15/14, F25B 15/16 take precedence)
F25B 15/025
. .
{
Liquid transfer means
}
F25B 15/04
. .
the refrigerant being ammonia evaporated from aqueous solution
{
(F25B 15/025 takes precedence)
}
F25B 15/06
. .
the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
{
(F25B 15/025 takes precedence)
}
F25B 15/08
. .
the refrigerant being sulfuric acid
{
(F25B 15/025 takes precedence)
}
F25B 15/09
. .
the refrigerant being hydrogen desorbed from a hydride
{
(F25B 15/025 takes precedence)
}
.
with inert gas (
{
F25B 15/004, F25B 15/006, F25B 15/008
}
, F25B 15/12, F25B 15/14, F25B 15/16 take precedence)
F25B 15/12
.
with resorber (
{
F25B 15/004, F25B 15/006, F25B 15/008
}
, F25B 15/14 take precedence)
F25B 15/14
.
using osmosis (
{
F25B 15/004, F25B 15/006, F25B 15/008 take precedence
}
)
F25B 15/16
.
using desorption cycle (
{
F25B 15/004, F25B 15/006, F25B 15/008 take precedence
}
)
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Sorption machines, plant, or systems, operating intermittently, e.g. absorption or adsorption type
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F25B 17/02
.
the absorbent or adsorbent being a liquid, e.g. brine (F25B 17/10 takes precedence)
F25B 17/04
. .
with two or more boilers operating alternately
F25B 17/06
. .
with the boiler and evaporator built-up as a unit in a tiltable or revolving arrangement
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F25B 17/08
.
the absorbent or adsorbent being a solid, e.g. salt (F25B 17/12 takes precedence)
F25B 17/083
. .
{
with two or more boiler-sorbers operating alternately
}
F25B 17/086
. .
{
with two or more boiler-sorber/evaporator units
}
F25B 17/10
.
using the endothermic solution of salt
F25B 17/12
.
using desorption of hydrogen from a hydride
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Guide Heading:
Machines, plant, or systems, with a single mode of operation, not covered by groups F25B 1/00 to F25B 17/00
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Machines, plant, or systems, using evaporation of a refrigerant but without recovery of the vapour
F25B 19/005
.
{
the refrigerant being a liquefied gas
}
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F25B 19/02
.
using fluid jet, e.g. of steam
{
(F25B 19/005 takes precedence)
}
F25B 19/04
. .
using liquid jet, e.g. of water
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Machines, plant, or systems, using electric or magnetic effects
{
(magnetic refrigerating material H01F 1/012 and H01F 1/017)
}
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.
using Peltier effect; using Nernst-Ettinghausen effect (thermo-electric elements H01L 35/00, H01L 37/00)
F25B 21/04
. .
reversible
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F25B 23/00
Machines, plant, or systems, with a single mode of operation not covered by groups F25B 1/00 to F25B 21/00, e.g. using selective radiation effect
.
{
using selective radiation effect
}
.
{
boiling cooling systems
}
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Machines, plant, or systems, using a combination of modes of operation covered by two or more of the groups F25B 1/00 to F25B 23/00(combinations of two or more modes of operation covered by a single main group, see the relevant group)
.
{
using primary and secondary systems
}
F25B 25/02
.
Compression-sorption machines, plants, or systems
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Machines, plant, or systems, using particular sources of energy (F25B 30/06 takes precedence)
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F25B 27/002
.
{
using solar energy (use of solar heat not otherwise provided for F24J 2/00)
}
F25B 27/005
. .
{
in compression type systems
}
F25B 27/007
. .
{
in sorption type systems
}
F25B 27/02
.
using waste heat, e.g. from internal-combustion engines
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Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
F25B 29/003
.
{
of the compression type system
}
F25B 29/006
.
{
of the sorption type system
}
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Heat pumps
F25B 30/02
.
of the compression type
F25B 30/04
.
of the sorption type
F25B 30/06
.
characterised by the source of low potential heat
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Guide Heading:
Component parts or details
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Compressor arrangements (compressors per se F04)
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F25B 31/002
.
{
lubrication (of compressors per se F04B, of machines or engines in general F01M)
}
F25B 31/004
. .
{
oil recirculating arrangements
}
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F25B 31/006
.
{
cooling of compressor or motor (of compressors per se F04B 39/06)
}
F25B 31/008
. .
{
by injecting a liquid (for compressors in general F04B 39/062)
}
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F25B 31/02
.
of motor-compressor units
F25B 31/023
. .
{
with compressor of reciprocating-piston type
}
F25B 31/026
. .
{
with compressor of rotary type
}
Boilers; Analysers; Rectifiers (boiler-absorbers F25B 35/00)
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Boiler-absorbers, i.e. boilers usable for absorption or adsorption
F25B 35/02
.
using a liquid as sorbent, e.g. brine
F25B 35/04
.
using a solid as sorbent
Absorbers; Adsorbers (boiler-absorbers F25B 35/00; separating processes involving the treatment of liquids with adsorbents 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);
{
(absorption or adsorption in general B01J 20/00)
}
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Evaporators; Condensers
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F25B 39/02
.
Evaporators
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F25B 39/022
. .
{
with plate-like or laminated elements
}
F25B 39/024
. . .
{
with elements constructed in the shape of a hollow panel (for heat exchange in general F28F 3/12)
}
F25B 39/026
. .
{
specially adapted for sorption type systems
}
F25B 39/028
. .
{
having distributing means
}
F25B 39/04
.
Condensers
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Subcoolers, desuperheaters or superheaters
F25B 40/02
.
Subcoolers
F25B 40/04
.
Desuperheaters
F25B 40/06
.
Superheaters
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Fluid-circulation arrangements, e.g. for transferring liquid from evaporator to boiler (pumps per se, sealings therefor F04)
.
{
fluid line arrangements
}
F25B 41/006
.
{
optical fluid control arrangements
}
F25B 41/02
.
using electro-osmosis
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F25B 41/04
.
Disposition of valves (valves per se F16K)
F25B 41/043
. .
{
in the circuit between evaporator and compressor
}
F25B 41/046
. .
{
of fluid flow reversing valves
}
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F25B 41/06
.
Flow restrictors, e.g. capillary tubes; Disposition thereof
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. .
[Expansion valves (regulating valves per se G05D)]
F25B 41/065
. . .
{
Float control valves
}
. .
{
capillary tubes
}
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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)
.
{
filters (in general B01D)
}
.
{
accumulators
}
F25B 43/02
.
for separating lubricants from the refrigerant
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F25B 43/04
.
for withdrawing non-condensible gases
F25B 43/043
. .
{
for compression type systems
}
F25B 43/046
. .
{
for sorption type systems
}
Arrangements for charging or discharging refrigerant
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F25B 47/00
Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
F25B 47/003
.
{
for preventing corrosion
}
.
{
for preventing frost
}
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.
Defrosting cycles
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F25B 47/022
. .
{
hot gas defrosting
}
F25B 47/025
. . .
{
by reversing the cycle
}
F25B 47/027
. .
{
for defrosting sorption type systems
}
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Arrangement or mounting of control or safety devices (testing refrigerators G01M; control in general G05)
.
{
of safety devices (F25B 49/02 and F25B 49/04 take precedence)
}
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.
for compression type machines, plant or systems
. .
{
Compressor control arrangements (in general F04B)
}
. .
{
Motor control arrangements (motors per se H02K)
}
. .
{
Condenser control arrangements
}
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F25B 49/04
.
for sorption type machines, plant or systems
F25B 49/043
. .
{
Operating continuously
}
F25B 49/046
. .
{
Operating intermittently
}

F25B 2100/00
F25B 2300/00
Special arrangements or features for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems
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F25B 2309/00
Gas cycle refrigeration machines
F25B 2309/001
.
with a linear configuration or a linear motor
F25B 2309/002
.
with parallel working cold producing expansion devices in one circuit
F25B 2309/003
.
characterised by construction or composition of the regenerator
F25B 2309/004
.
using a compressor of the rotary type
F25B 2309/005
.
using an expander of the rotary type
F25B 2309/006
.
using a distributing valve of the rotary type
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F25B 2309/02
.
using the Joule-Thompson effect
F25B 2309/021
. .
with a cryosurgical probe tip having a specific construction
F25B 2309/022
. .
characterised by the expansion element
F25B 2309/023
. .
with two stage expansion
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F25B 2309/06
.
Compression machines, plant or systems characterised by the refrigerant being carbon dioxide
F25B 2309/061
. .
with cycle highest pressure above the supercritical pressure
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F25B 2309/14
.
Compression machines, plant or systems characterised by the cycle used
F25B 2309/1401
. .
Ericsson or Ericcson cycles
F25B 2309/1402
. .
Pulse-tube cycles with acoustic driver
F25B 2309/1403
. .
Pulse-tube cycles with heat input into acoustic driver
F25B 2309/1404
. .
Pulse-tube cycles with loudspeaker driven acoustic driver
F25B 2309/1405
. .
Pulse-tube cycles with travelling waves
F25B 2309/1406
. .
Pulse-tube cycles with pulse tube in co-axial or concentric geometrical arrangements
F25B 2309/1407
. .
Pulse-tube cycles with pulse tube having in-line geometrical arrangements
F25B 2309/1408
. .
Pulse-tube cycles with pulse tube having U-turn or L-turn type geometrical arrangements
F25B 2309/1409
. .
Pulse-tube cycles with pulse tube having special type of geometrical arrangements not being a coaxial, in-line or U-turn type
F25B 2309/1411
. .
Pulse-tube cycles characterised by control details, e.g. tuning, phase shifting or general control
F25B 2309/1412
. .
Pulse-tube cycles characterised by heat exchanger details
F25B 2309/1413
. .
Pulse-tube cycles characterised by performance, geometry or theory
F25B 2309/1414
. .
Pulse-tube cycles characterised by pulse tube details
F25B 2309/1415
. .
Pulse-tube cycles characterised by regenerator details
F25B 2309/1416
. .
Pulse-tube cycles characterised by regenerator stack details
F25B 2309/1417
. .
Pulse-tube cycles without any valves in gas supply and return lines
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F25B 2309/1418
. .
Pulse-tube cycles with valves in gas supply and return lines
F25B 2309/14181
. . .
the valves being of the rotary type
F25B 2309/1419
. .
Pulse-tube cycles with pulse tube having a basic pulse tube refrigarator (PTR), i.e. comprising a tube with basic schematic
F25B 2309/1421
. .
Pulse-tube cycles characterised by details not otherwise provided for
F25B 2309/1422
. .
Pulse tubes with basic schematic including a counter flow heat exchanger instead of a regenerative heat exchanger
F25B 2309/1423
. .
Pulse tubes with basic schematic including an inertance tube
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F25B 2309/1424
. .
Pulse tubes with basic schematic including an orifice and a reservoir
F25B 2309/14241
. . .
Pulse tubes with basic schematic including an orifice reservoir multiple inlet pulse tube
F25B 2309/1425
. .
Pulse tubes with basic schematic including several pulse tubes
F25B 2309/1426
. .
Pulse tubes with basic schematic including at the pulse tube warm end a so called warm end expander
F25B 2309/1427
. .
Control of a pulse tube
F25B 2309/1428
. .
Control of a Stirling refrigeration machine
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F25B 2313/00
Compression machines, plant, or systems with reversible cycle not otherwise provided for
F25B 2313/001
.
with two or more accumulators
F25B 2313/002
.
geothermal
F25B 2313/003
.
Indoor unit with water as a heat sink or heat source
F25B 2313/004
.
Outdoor unit with water as a heat sink or heat source
F25B 2313/005
.
Outdoor unit expansion valves
F25B 2313/006
.
two pipes connecting the outdoor side to the indoor side with multiple indoor units
F25B 2313/007
.
three pipes connecting the outdoor side to the indoor side with multiple indoor units
F25B 2313/008
.
Refrigerant heaters
F25B 2313/009
.
indoor unit in circulation with outdoor unit in first operation mode, indoor unit in circulation with an other heat exchanger in second operation mode or outdoor unit in circulation with an other heat exchanger in third operation mode
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F25B 2313/021
.
Indoor unit or outdoor unit with auxiliary heat exchanger not forming part of the indoor or outdoor unit
F25B 2313/0211
. .
the auxiliary heat exchanger being only used during defrosting
F25B 2313/0212
. .
the auxiliary heat exchanger being only used during dehumidifying
F25B 2313/0213
. .
the auxiliary heat exchanger being only used during heating
F25B 2313/0214
. .
the auxiliary heat exchanger being used parallel to the indoor unit during heating operation
F25B 2313/0215
. .
the auxiliary heat exchanger being used parallel to the outdoor heat exchanger during heating operation
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F25B 2313/023
.
using multiple indoor units
F25B 2313/0231
. .
with simultaneous cooling and heating
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F25B 2313/0232
. .
with bypasses
F25B 2313/02321
. . .
during cooling
F25B 2313/02322
. . .
during defrosting
F25B 2313/02323
. . .
during heating
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F25B 2313/0233
. .
in parallel arrangements
F25B 2313/02331
. . .
during cooling
F25B 2313/02332
. . .
during defrosting
F25B 2313/02333
. . .
during dehumidification
F25B 2313/02334
. . .
during heating
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F25B 2313/0234
. .
in series arrangements
F25B 2313/02341
. . .
during cooling
F25B 2313/02342
. . .
during defrosting
F25B 2313/02343
. . .
during dehumidification
F25B 2313/02344
. . .
during heating
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F25B 2313/025
.
using multiple outdoor units
F25B 2313/0251
. .
being defrosted alternately
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F25B 2313/0252
. .
with bypasses
F25B 2313/02521
. . .
during cooling
F25B 2313/02522
. . .
during defrosting
F25B 2313/02523
. . .
during heating
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F25B 2313/0253
. .
in parallel arrangements
F25B 2313/02531
. . .
during cooling
F25B 2313/02532
. . .
during defrosting
F25B 2313/02533
. . .
during heating
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F25B 2313/0254
. .
in series arrangements
F25B 2313/02541
. . .
during cooling
F25B 2313/02542
. . .
during defrosting
F25B 2313/02543
. . .
during heating
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F25B 2313/027
.
characterised by the reversing means
F25B 2313/0271
. .
the compressor allows rotation in reverse direction
F25B 2313/0272
. .
using bridge circuits of one-way valves
F25B 2313/02731
. .
using one three-way valve
F25B 2313/02732
. .
using two three-way valves
F25B 2313/02741
. .
using one four-way valve
F25B 2313/02742
. .
using two four-way valves
F25B 2313/02743
. .
using three four-way valves
F25B 2313/0276
. .
using six-way valves
F25B 2313/0279
. .
using nine-way valves
F25B 2313/02791
. .
using shut-off valves
F25B 2313/02792
. .
using reversing valve changing the refrigerant flow direction due to pressure differences of the refrigerant and not by external actuation
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F25B 2313/029
.
Control issues
F25B 2313/0291
. .
related to the pressure of the indoor unit
F25B 2313/0292
. .
related to reversing valves
F25B 2313/0293
. .
related to the indoor fan, e.g. controlling speed
F25B 2313/0294
. .
related to the outdoor fan, e.g. controlling speed
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F25B 2313/031
.
Sensor arrangements
F25B 2313/0311
. .
Pressure sensors near the expansion valve
F25B 2313/0312
. .
Pressure sensors near the indoor heat exchanger
F25B 2313/0313
. .
Pressure sensors near the outdoor heat exchanger
F25B 2313/0314
. .
Temperature sensors near the indoor heat exchanger
F25B 2313/0315
. .
Temperature sensors near the outdoor heat exchanger
F25B 2313/0316
. .
Temperature sensors near the refrigerant heater
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F25B 2315/00
Sorption refrigeration cycles or details thereof
F25B 2315/001
.
Crystallization prevention
F25B 2315/002
.
Generator absorber heat exchanger (GAX)
F25B 2315/003
.
Hydrates for sorption cycles
F25B 2315/004
.
Inert heat-exchangers
F25B 2315/005
.
Regeneration
F25B 2315/006
.
Reversible sorption cycles
F25B 2315/007
.
Parallel systems therefor
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F25B 2321/00
Details of machines, plants, or systems, using electric or magnetic effects
F25B 2321/001
.
by using electro-caloric effects
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F25B 2321/002
.
by using magneto-caloric effects
F25B 2321/0021
. .
with a static fixed magnet
F25B 2321/0022
. .
with a rotating or otherwise moving magnet
F25B 2321/0023
. .
with modulation, influencing or enhancing an existing magnetic field
F25B 2321/003
.
by using thermionic electron cooling effects
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F25B 2321/02
.
using Peltier effects; using Nernst-Ettinghausen effects
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F25B 2321/021
. .
Control thereof
F25B 2321/0211
. . .
of fans
F25B 2321/0212
. . .
of electric power, current or voltage
F25B 2321/023
. .
Mounting details thereof
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F25B 2321/025
. .
Removal of heat
F25B 2321/0251
. . .
by a gas
F25B 2321/0252
. . .
by liquids or two-phase fluids
Collapse
F25B 2327/00
Refrigeration system using an engine for driving a compressor
F25B 2327/001
.
of the internal combustion type
Collapse
F25B 2333/00
Details of boilers; Analysers; Rectifiers
F25B 2333/001
.
the generator or boiler having an analyser
F25B 2333/002
.
the generator or boiler is heated electrically
F25B 2333/003
.
the generator or boiler is heated by combustion gas
F25B 2333/004
.
the generator or boiler uses an inert gas as pressure equalizing medium
Collapse
F25B 2333/005
.
the generator or boiler uses electromagnetic energy in the form of microwaves for desorbing the sorbate from the sorbate/sorbent compound
F25B 2333/0051
. .
the energy is used for heating an auxiliary medium which is used as heating source for desorbing the sorbate from the sorbate/sorbent compound
F25B 2333/006
.
the generator or boiler having a rectifier
F25B 2333/007
.
the generator or boiler heated by heat exchangers with steam or hot water as heating fluid or by a secondary boiling-condensing heater
Collapse
F25B 2339/00
Details of evaporators; Details of condensers
Collapse
F25B 2339/02
.
Details of evaporators
F25B 2339/021
. .
Evaporators in which refrigerant is sprayed on a surface to be cooled
F25B 2339/022
. .
Evaporators constructed from a pair of plates forming a space in which is located a refrigerant carrying coil
F25B 2339/023
. .
Evaporators consisting of one or several sheets on one face of which is fixed a refrigerant carrying coil
Collapse
F25B 2339/024
. .
Evaporators with refrigerant in a vessel in which is situated a heat exchanger
F25B 2339/0241
. . .
having plate-like elements
F25B 2339/0242
. . .
having tubular elements
Collapse
F25B 2339/04
.
Details of condensers
F25B 2339/041
. .
of evaporative condensers
F25B 2339/042
. .
of pcm condensers
F25B 2339/043
. .
Condensers made by assembling plate-like or laminated elements
Collapse
F25B 2339/044
. .
Condensers with an integrated receiver
F25B 2339/0441
. . .
containing a drier or a filter
F25B 2339/0442
. . .
characterised by the mechanical fixation of the receiver to the header
F25B 2339/0443
. . .
the receiver being positioned horizontally
F25B 2339/0444
. . .
where the flow of refrigerant through the condenser receiver is split into two or more flows, each flow following a different path through the condenser receiver
F25B 2339/0445
. . .
with throttle portions
F25B 2339/0446
. . .
characterised by the refrigerant tubes connecting the header of the condenser to the receiver; Inlet or outlet connections to receiver
F25B 2339/045
. .
Condensers made by assembling a tube on a plate-like element or between plate-like elements
F25B 2339/046
. .
Condensers with refrigerant heat exchange tubes positioned inside or around a vessel containing water or pcm to cool the refrigerant gas
F25B 2339/047
. .
Water-cooled condensers
Collapse
F25B 2341/00
Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
Collapse
F25B 2341/001
.
Ejectors not being used as compression device
F25B 2341/0011
. .
Ejectors with the cooled primary flow at reduced or low pressure
F25B 2341/0012
. .
Ejectors with the cooled primary flow at high pressure
F25B 2341/0013
. .
Ejector control arrangements
F25B 2341/0014
. .
Ejectors with a high pressure hot primary flow from a compressor discharge
F25B 2341/0015
. .
using two or more ejectors
F25B 2341/0016
. .
Ejectors for creating an oil recirculation
Collapse
F25B 2341/06
.
Details of flow restrictors or expansion valves
F25B 2341/061
. .
Bidirectional expansion restrictors
F25B 2341/062
. .
Capillary expansion valves
F25B 2341/063
. .
Feed forward expansion valves
F25B 2341/064
. .
Superheater expansion valves
Collapse
F25B 2341/065
. .
Electric expansion valves
F25B 2341/0651
. . .
actuated by electric heating means, e.g. a heated bimetallic element
F25B 2341/0652
. . .
being opened and closed cyclically, e. g. with pulse width modulation
F25B 2341/0653
. . .
actuated by an electric motor
Collapse
F25B 2341/066
. .
Refrigeration circuits using more than one expansion valve
F25B 2341/0661
. . .
arranged in parallel
F25B 2341/0662
. . .
arranged in series
Collapse
F25B 2341/067
. .
Expansion valves having a pilot valve
F25B 2341/0671
. . .
the pilot valve is electrically actuated
Collapse
F25B 2341/068
. .
Expansion valves combined with a sensor
F25B 2341/0681
. . .
the sensor is heated
F25B 2341/0682
. . .
the sensor contains sorbent materials
F25B 2341/0683
. . .
the sensor is disposed in the suction line and influenced by the temperature or the pressure of the suction gas
Collapse
F25B 2345/00
Details for charging or discharging refrigerants; Service stations therefor
F25B 2345/001
.
Charging refrigerant to a cycle
F25B 2345/002
.
Collecting refrigerant from a cycle
F25B 2345/003
.
Control issues for charging or collecting refrigerant to or from a cycle
F25B 2345/004
.
with several tanks to collect or charge a cycle
Collapse
F25B 2345/005
.
Service stations therefor
F25B 2345/0051
. .
having a carrying handle
F25B 2345/0052
. .
having wheels
F25B 2345/006
.
characterised by charging or discharging valves
F25B 2345/007
.
characterised by the weighing of refrigerant or oil
Collapse
F25B 2347/00
Details for preventing or removing deposits or corrosion
Collapse
F25B 2347/02
.
Details of defrosting cycles
F25B 2347/021
. .
Alternate defrosting
F25B 2347/022
. .
Cool gas defrosting
F25B 2347/023
. .
Set point defrosting
Collapse
F25B 2400/00
General 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
F25B 2400/01
.
Heaters
F25B 2400/02
.
Centrifugal separation of gas, liquid or oil
F25B 2400/03
.
Suction accumulators with deflectors
Collapse
F25B 2400/04
.
Refrigeration circuit bypassing means
F25B 2400/0401
. .
for the compressor
F25B 2400/0403
. .
for the condenser
F25B 2400/0405
. .
for the desuperheater
F25B 2400/0407
. .
for the ejector
F25B 2400/0409
. .
for the evaporator
F25B 2400/0411
. .
for the expansion valve or capillary tube
F25B 2400/0413
. .
for the filter or drier
F25B 2400/0415
. .
for the receiver
F25B 2400/0417
. .
for the subcooler
F25B 2400/0419
. .
for the superheater
Collapse
F25B 2400/05
.
Compression system with heat exchange between particular parts of the system
F25B 2400/051
. .
between the accumulator and another part of the cycle
F25B 2400/052
. .
between the capillary tube and another part of the refrigeration cycle
F25B 2400/053
. .
between the storage receiver and another part of the system
F25B 2400/054
. .
between the suction tube of the compressor and another part of the cycle
Collapse
F25B 2400/06
.
Several compression machines arranged in parallel
F25B 2400/061
. .
the capacity of the first system being different from the second
Collapse
F25B 2400/07
.
Details of compressors or related parts
F25B 2400/071
. .
Compressor mounted in a housing in which a condenser is integrated
F25B 2400/072
. .
Intercoolers therefor
F25B 2400/073
. .
Linear compressors
F25B 2400/074
. .
with multiple cylinders
Collapse
F25B 2400/075
. .
with parallel compressors
F25B 2400/0751
. . .
the compressors having different capacities
F25B 2400/076
. .
having multiple cylinders driven by a rotating swash plate
F25B 2400/077
. .
Compressor control units, e.g. terminal boxes, mounted on the compressor casing wall containing for example starter, protection switches or connector contacts
F25B 2400/08
.
Refrigeration machines, plants and systems having means for detecting the concentration of a refrigerant
F25B 2400/09
.
Refrigeration machines, plants and systems having means for detecting the concentration of a sorbent solution
F25B 2400/11
.
Drop catchers
Collapse
F25B 2400/12
.
Inflammable refrigerants
F25B 2400/121
. .
using R1234
F25B 2400/13
.
Economisers
Collapse
F25B 2400/14
.
Power generation using energy from the expansion of the refrigerant
F25B 2400/141
. .
the extracted power is not recycled back in the refrigerant circuit
F25B 2400/15
.
Micro-electro-mechanical devices
Collapse
F25B 2400/16
.
Receivers
F25B 2400/161
. .
arranged in parallel
F25B 2400/162
. .
characterised by the plug or stop
F25B 2400/17
.
Re-condensers
F25B 2400/18
.
Refrigerant conversion
F25B 2400/19
.
Pumping down refrigerant from one part of the cycle to another part of the cycle, e.g. when the cycle is changed from cooling to heating, or before a defrost cycle is started
F25B 2400/21
.
Modules for refrigeration systems
F25B 2400/22
.
Refrigeration systems for supermarkets
F25B 2400/23
.
Separators
F25B 2400/24
.
Storage receiver heat
Collapse
F25B 2500/00
Problems to be solved
F25B 2500/01
.
Geometry problems, e.g. for reducing size
F25B 2500/02
.
Increasing the heating capacity of a reversible cycle during cold outdoor conditions
F25B 2500/03
.
Cavitations
F25B 2500/04
.
Clogging
F25B 2500/05
.
Cost reduction
F25B 2500/06
.
Damage
F25B 2500/07
.
Exceeding a certain pressure value in a refrigeration component or cycle
F25B 2500/08
.
Exceeding a certain temperature value in a refrigeration component or cycle
F25B 2500/09
.
Improving heat transfers
F25B 2500/11
.
Reducing heat transfers
F25B 2500/12
.
Sound
F25B 2500/13
.
Vibrations
F25B 2500/14
.
the presence of moisture in a refrigeration component or cycle
F25B 2500/15
.
Hunting, i.e. oscillation of controlled refrigeration variables reaching undesirable values
F25B 2500/16
.
Lubrication
F25B 2500/17
.
Size reduction
F25B 2500/18
.
Optimization, e.g. high integration of refrigeration components
F25B 2500/19
.
Calculation of parameters
F25B 2500/21
.
Reduction of parts
Collapse
F25B 2500/22
.
Preventing, detecting or repairing leaks of refrigeration fluids
F25B 2500/221
. .
Preventing leaks from developing
F25B 2500/222
. .
Detecting refrigerant leaks
F25B 2500/23
.
High amount of refrigerant in the system
F25B 2500/24
.
Low amount of refrigerant in the system
F25B 2500/25
.
Standardisation of apparatus or parts
F25B 2500/26
.
characterised by the startup of the refrigeration cycle
F25B 2500/27
.
characterised by the stop of the refrigeration cycle
F25B 2500/28
.
Means for preventing liquid refrigerant entering into the compressor
F25B 2500/29
.
High ambient temperatures
F25B 2500/31
.
Low ambient temperatures
F25B 2500/32
.
Weight
Collapse
F25B 2600/00
Control issues
F25B 2600/01
.
Timing
Collapse
F25B 2600/02
.
Compressor control
F25B 2600/021
. .
Inverters therefor
F25B 2600/022
. .
for multi-stage operation
F25B 2600/023
. .
controlling swash plate angles
F25B 2600/024
. .
by controlling the electric parameters, e.g. current or voltage
Collapse
F25B 2600/025
. .
by controlling speed
F25B 2600/0251
. . .
with on-off operation
F25B 2600/0252
. . .
with two speeds
F25B 2600/0253
. . .
with variable speed
Collapse
F25B 2600/026
. .
by controlling unloaders
F25B 2600/0261
. . .
external to the compressor
F25B 2600/0262
. . .
internal to the compressor
Collapse
F25B 2600/027
. .
by controlling pressure
F25B 2600/0271
. . .
the discharge pressure
F25B 2600/0272
. . .
the suction pressure
F25B 2600/05
.
Refrigerant levels
F25B 2600/07
.
Remote controls
Collapse
F25B 2600/11
.
Fan speed control
F25B 2600/111
. .
of condenser fans
F25B 2600/112
. .
of evaporator fans
F25B 2600/13
.
Pump speed control
F25B 2600/15
.
during shut down
F25B 2600/17
.
by controlling the pressure of the condenser
F25B 2600/19
.
Refrigerant outlet condenser temperature
F25B 2600/21
.
Refrigerant outlet evaporator temperature
F25B 2600/23
.
Time delays
Collapse
F25B 2600/25
.
Control of valves
F25B 2600/2501
. .
Bypass valves
F25B 2600/2503
. .
Condenser exit valves
F25B 2600/2505
. .
Fixed-differential control valves
F25B 2600/2507
. .
Flow-diverting valves
F25B 2600/2509
. .
Economiser valves
F25B 2600/2511
. .
Evaporator distribution valves
F25B 2600/2513
. .
Expansion valves
F25B 2600/2515
. .
Flow valves
F25B 2600/2517
. .
Head-pressure valves
F25B 2600/2519
. .
On-off valves
F25B 2600/2521
. .
On-off valves controlled by pulse signals
F25B 2600/2523
. .
Receiver valves
F25B 2600/2525
. .
Pressure relief valves
Collapse
F25B 2700/00
Sensing or detecting of parameters; Sensors therefor
F25B 2700/01
.
Sensors determining characteristics of the burner for a generator
F25B 2700/02
.
Humidity
F25B 2700/03
.
Oil level
F25B 2700/04
.
Refrigerant level
F25B 2700/05
.
Load shedding of a compressor
F25B 2700/06
.
Piston positions of a compressor
Collapse
F25B 2700/11
.
Sensor to detect if defrost is necessary
F25B 2700/111
. .
using an emitter and receiver , e.g. sensing by emitting light or other radiation and receiving reflection by a sensor
Collapse
F25B 2700/13
.
Mass flow of refrigerants
F25B 2700/131
. .
at the outlet of a subcooler
Collapse
F25B 2700/133
. .
through the condenser
F25B 2700/1331
. . .
at the inlet
F25B 2700/1332
. . .
at the outlet
Collapse
F25B 2700/135
. .
through the evaporator
F25B 2700/1351
. . .
of the cooled fluid upstream or downstream of the evaporator
F25B 2700/1352
. . .
at the inlet
F25B 2700/1353
. . .
at the outlet
Collapse
F25B 2700/15
.
Power, e.g. by voltage or current
F25B 2700/151
. .
of the compressor motor
Collapse
F25B 2700/17
.
Speeds
F25B 2700/171
. .
of the compressor
F25B 2700/172
. .
of the condenser fan
F25B 2700/173
. .
of the evaporator fan
Collapse
F25B 2700/19
.
Pressures
F25B 2700/191
. .
near an expansion valve
Collapse
F25B 2700/193
. .
of the compressor
F25B 2700/1931
. . .
Discharge pressures
F25B 2700/1932
. . .
Oil pressures
F25B 2700/1933
. . .
Suction pressures
F25B 2700/195
. .
of the condenser
F25B 2700/197
. .
of the evaporator
Collapse
F25B 2700/21
.
Temperatures
F25B 2700/2101
. .
in a bypass
F25B 2700/2102
. .
at the outlet of the gas cooler
F25B 2700/2103
. .
near a heat exchanger
F25B 2700/2104
. .
of an indoor room or compartment
F25B 2700/2105
. .
Oil temperatures
F25B 2700/2106
. .
of fresh outdoor air
F25B 2700/2107
. .
of a Peltier element
F25B 2700/2108
. .
of a receiver
F25B 2700/2109
. .
of a separator
F25B 2700/2111
. .
of a heat storage receiver
F25B 2700/2113
. .
of a suction accumulator
Collapse
F25B 2700/2115
. .
of a compressor or the drive means therefor
F25B 2700/21151
. . .
at the suction side of the compressor
F25B 2700/21152
. . .
at the discharge side of the compressor
F25B 2700/21153
. . .
of electronic components
F25B 2700/21154
. . .
of an inverter
F25B 2700/21155
. . .
of the oil
Collapse
F25B 2700/21156
. . .
of the motor
F25B 2700/21157
. . . .
at the coil or rotor
Collapse
F25B 2700/2116
. .
of a condenser
F25B 2700/21161
. . .
the fluid cooled by the condenser
F25B 2700/21162
. . .
of the refrigerant at the inlet of the condenser
F25B 2700/21163
. . .
of the refrigerant at the outlet of the condenser
Collapse
F25B 2700/2117
. .
of an evaporator
Collapse
F25B 2700/21171
. . .
of the fluid cooled by the evaporator
F25B 2700/21172
. . . .
at the inlet
F25B 2700/21173
. . . .
at the outlet
F25B 2700/21174
. . .
of the refrigerant at the inlet of the evaporator
F25B 2700/21175
. . .
of the refrigerant at the outlet of the evaporator
This page is owned by Office of Patent Classification.
Last Modified: 10/10/2013