ClassID:

159487

F25B2500/16 - CPC Classification

Classification description:

Problems to be solved Lubrication

Recent Application in this class:
#1
20260110473
2026-04-23

SYSTEM AND METHOD FOR LUBRICANT QUALITY CONTROL OF AN HVACR SYSTEM

#2
20260104185
2026-04-16

MOTOR COOLING SYSTEM

#3
20260029174
2026-01-29

METHOD FOR MANAGING OIL IN A MULTI-COMPRESSOR REFRIGERATION SYSTEM AND MULTI-COMPRESSOR REFRIGERATION SYSTEM HAVING A COMMON OIL EQUALIZATION LINE PROVIDED WITH AN OIL PUMPING DEVICE

#4
20250305730
2025-10-02

LUBRICANT SEPARATION SYSTEM FOR HVAC&R SYSTEM

#5
20250290527
2025-09-18

OIL LUBRICATED FLUID PUMPS WITH OIL SEPARATORS

#6
20250277611
2025-09-04

REFRIGERANT CIRCULATION SYSTEM

#7
20250230955
2025-07-17

OIL-FREE BEARING LIQUID SUPPLY AIR-CONDITIONING SYSTEM AND CONTROL METHOD THEREFOR

#8
20250216138
2025-07-03

A MULTI-COMPRESSOR SYSTEM HAVING INDIVIDUAL OIL BALANCING LINES

#9
20250155172
2025-05-15

COMPRESSOR OIL RECOVERY IN HYBRID VCC PUMPED TWO PHASE LOOPS

#10
20250085038
2025-03-13

ACCUMULATOR AND A HEAT PUMP SYSTEM WITH THE SAME

#11
20250043999
2025-02-06

OIL LUBRICATION-TYPE COMPRESSOR FOR CRYOCOOLER

#12
20240426532
2024-12-26

REFRIGERANT SYSTEM AND CONTROLLING METHOD THEREOF

#13
20240401859
2024-12-05

Control method and device suitable for air conditioner in high drop mode

#14
20240337422
2024-10-10

AIR CONDITIONER

#15
20240305150
2024-09-12

ROTOR, ELECTRIC MOTOR, COMPRESSOR, REFRIGERATION CYCLE DEVICE, AND AIR CONDITIONER

#16
20240280300
2024-08-22

COOLING SYSTEM AND METHOD FOR OPERATING A COOLING SYSTEM

#17
20240240806
2024-07-18

AIR CONDITIONER, CONTROL METHOD, AND NON-TRANSITORY COMPUTER-READABLE RECORDING MEDIUM

#18
20240191924
2024-06-13

REFRIGERANT LEAK DETERMINATION APPARATUS, CONTROL DEVICE, COMPUTER READABLE MEDIUM, AND REFRIGERANT LEAK DETERMINATION METHOD

#19
20240085073
2024-03-14

Cooling device

#20
20240060691
2024-02-22

MULTIPLE-COMPRESSOR SYSTEM WITH OIL BALANCE CONTROL

#21
20240044564
2024-02-08

REFRIGERATION PLANT AND OPERATING METHOD THEREOF

#22
20230383760
2023-11-30

Refrigerant compressor with wear sleeve and lubricant blends for handling debris-laden fluids

#23
20230358255
2023-11-09

OIL LUBRICATED FLUID PUMPS WITH OIL SEPARATORS

#24
20230349602
2023-11-02

OIL MANAGEMENT SYSTEM FOR MULTIPLE COMPRESSORS

#25
20230349421
2023-11-02

Porous gas bearing

#26
20230272951
2023-08-31

Compression apparatus

#27
20230194135
2023-06-22

OIL MANAGEMENT FOR DUAL COMPRESSOR MODULATION

#28
20230175748
2023-06-08

Refrigeration cycle apparatus

#29
20230135687
2023-05-04

Heat pump

#30
20230014676
2023-01-19

Grease and refrigeration cycle apparatus using grease as lubricant

#31
20220404077
2022-12-22

Refrigeration system and oil recovery method for the same

#32
20220341640
2022-10-27

Method for replacing refrigerant in refrigeration apparatus, refrigerating machine oil, and container

#33
20220316777
2022-10-06

ELECTRONIC EXPANSION VALVE AND AIR CONDITIONING SYSTEM USING THE SAME

#34
20220316767
2022-10-06

REFRIGERANT CYCLE SYSTEM

#35
20220307746
2022-09-29

Method for managing a heat pump operating with a low environmental impact operating fluid

#36
20220196310
2022-06-23

Control system for a vapor compression system

#37
20220099341
2022-03-31

Multi-compressor oil equalization

#38
20220082315
2022-03-17

System and method for dynamically determining refrigerant film thickness and dynamically controlling refrigerant film thickness at rolling-element bearing of an oil free chiller

#39
20220082308
2022-03-17

Refrigeration apparatus

#40
20220065502
2022-03-03

Heat exchange system and method for reclaiming corrosion inhibitor in heat exchange system

#41
20220011032
2022-01-13

Control method and system for refrigeration, oil return and noise reduction of multi-split air-conditioner

#42
20220003468
2022-01-06

Automatic oil level retention system for compressor and method for controlling same

#43
20210372680
2021-12-02

Refrigeration cycle apparatus that injects refrigerant into compressor during low load operation

#44
20210355943
2021-11-18

Rotary cylinder piston compressor pump and compressor with rotary cylinder piston compressor pump

#45
20210348807
2021-11-11

Oil management system for multiple compressors

#46
20210285693
2021-09-16

Lubricant management for an HVACR system

#47
20210247107
2021-08-12

METHOD AND SYSTEM FOR COOLING A MOTOR DURING MOTOR STARTUP

#48
20210215058
2021-07-15

Device and method for operating volumetric expansion machines

#49
20210207857
2021-07-08

Oil sump for multi-compressor HVAC and R system

#50
20210190394
2021-06-24

Turbo refrigerator and startup control method therefor

#51
20210148615
2021-05-20

MULTI-SPLIT AIR CONDITIONING SYSTEM AND METHOD AND DEVICE FOR CONTROLLING OIL RETURN OF THE MULTI-SPLIT AIR CONDITIONING SYSTEM

#52
20210123639
2021-04-29

Oil control system and method for HVAC system

#53
20210116154
2021-04-22

Compressor cooling

#54
20210108843
2021-04-15

Refrigeration machine control device, turbo refrigeration machine, refrigeration machine control method, and program

#55
20210018235
2021-01-21

System and method for lubricant separation and return control

#56
20200408256
2020-12-31

Porous gas bearing

#57
20200378668
2020-12-03

Lubricant quality management for a compressor

#58
20200378664
2020-12-03

LUBRICANT MANAGEMENT IN AN HVACR SYSTEM

#59
20200378658
2020-12-03

Refrigeration apparatus

#60
20200370805
2020-11-26

Lubricant blends to reduce refrigerant solubility

#61
20200370803
2020-11-26

REFRIGERATION APPARATUS AND USE THEREOF

#62
20200370801
2020-11-26

Refrigeration apparatus including lubrication of compressor with refrigerant

#63
20200370800
2020-11-26

Refrigeration apparatus

#64
20200370799
2020-11-26

Refrigeration apparatus with refrigerant lubricant subcooling heat exchanger and use thereof

#65
20200370798
2020-11-26

Refrigeration apparatus

#66
20200370797
2020-11-26

Refrigeration apparatus having subcooling heat exchanger for lubrication flow

#67
20200355193
2020-11-12

Refrigerant lubrication system with side channel pump

#68
20200333053
2020-10-22

COOLING CIRCUIT SECTION AND COOLING CIRCUIT

#69
20200309435
2020-10-01

Refrigeration cycle apparatus recovering refrigerator oil in refrigerant circuit

#70
20200292220
2020-09-17

Oil separator and refrigeration cycle apparatus

#71
20200292216
2020-09-17

Refrigerating cycle apparatus

#72
20200256595
2020-08-13

Air conditioner system including refrigerant cycle circuit for oil flow blocking

#73
20200232687
2020-07-23

Compressor with oil equalizing pipe, parallel compressor set, and oil equalizing method

#74
20200166258
2020-05-28

Oil return control method and device of air conditioning system, storage medium and air conditioning system

#75
20200166252
2020-05-28

Cooling system and method for operating a cooling system

#76
20200166249
2020-05-28

Cooling system for a refrigerant lubricated bearing assembly

#77
20200141619
2020-05-07

Multi-split system and method and apparatus for adjusting oil volume of compressor of multi-split system

#78
20200141618
2020-05-07

FLUID STIRRING AND LIQUEFACTION PROMOTING APPARATUS DISPOSED ON PIPELINE OF HEAT PUMP SYSTEM

#79
20200141617
2020-05-07

Lubrication supply system

#80
20200132350
2020-04-30

Additive composition for improvement of miscibility of lubricants in air-conditioning and refrigeration systems

#81
20200072521
2020-03-05

Method and apparatus for balanced fluid distribution in tandem-compressor systems

#82
20200056603
2020-02-20

Linear compressor and method for controlling linear compressor

#83
20190383539
2019-12-19

Lubricant quality management for a compressor

#84
20190376556
2019-12-12

Porous gas bearing

#85
20190376555
2019-12-12

Porous gas bearing

#86
20190346188
2019-11-14

Refrigeration cycle apparatus

#87
20190346182
2019-11-14

Refrigeration cycle apparatus

#88
20190322916
2019-10-24

Composition for heat cycle system, and heat cycle system

#89
20190301778
2019-10-03

REFRIGERATION CYCLE APPARATUS

#90
20190293334
2019-09-26

System and method for dynamically determining refrigerant film thickness and dynamically controlling refrigerant film thickness at rolling-element bearing of an oil free chiller

#91
20190271491
2019-09-05

Vapor compression system with refrigerant-lubricated compressor

#92
20190257302
2019-08-22

Refrigeration system and the lubrication method thereof

#93
20190242622
2019-08-08

Refrigeration cycle apparatus

#94
20190212038
2019-07-11

Method of managing compressor start for transport refrigeration system

#95
20190203882
2019-07-04

Oil flow switch and lubrication system with the same for a refrigeration system

#96
20190178543
2019-06-13

Accumulator and oil separator

#97
20190178537
2019-06-13

Vapor compression system with refrigerant-lubricated compressor

#98
20190162457
2019-05-30

Lubrication and cooling system

#99
20190032971
2019-01-31

Refrigerant compressor and freezing apparatus using same

#100
20180320946
2018-11-08

Sensor failure error handling

#101
20180306472
2018-10-25

Multi-stage oil batch boiling system

#102
20180305599
2018-10-25

Refrigerating machine oil composition and working fluid composition for refrigerating machine using same

#103
20180283753
2018-10-04

SYSTEM AND METHOD OF CONTROLLING AN OIL FLOW WITHIN A REFRIGERATION SYSTEM

#104
20180283746
2018-10-04

Refrigeration cycle apparatus in which a lubricating oil circulates together with refrigerant

#105
20180282649
2018-10-04

Freezer oil, composition for freezers, freezer, and method for selecting freezer oil

#106
20180274830
2018-09-27

Method and apparatus for common pressure and oil equalization in multi-compressor systems

#107
20180274527
2018-09-27

LABYRINTH SEALS FOR COMPRESSOR

#108
20180266737
2018-09-20

Air-conditioning apparatus with return oil flow controlled through solenoid valves

#109
20180202425
2018-07-19

Oil separate and collect device

#110
20180180333
2018-06-28

Liquid sensing for refrigerant-lubricated bearings

#111
20180180332
2018-06-28

Heat transfer system with tribofilm on bearing surface

#112
20180128521
2018-05-10

Cooling system

#113
20180097419
2018-04-05

Compressor for compressing refrigerant and having a motor with insulator tooth portions

#114
20180087816
2018-03-29

High outdoor ambient and high suction pressure oil pump out mitigation for air conditioners

#115
20180079982
2018-03-22

Refrigerator lubricating oil and mixed composition for refrigerator

#116
20180073786
2018-03-15

Air-conditioning apparatus

#117
20180023868
2018-01-25

Refrigeration cycle apparatus with oil separator switching valve

#118
20180003419
2018-01-04

Air conditioning device

#119
20170356448
2017-12-14

Screw compressor with oil shutoff and method

#120
20170335849
2017-11-23

CRANKSHAFT FOR ROTATORY COMPRESSOR, ROTATORY COMPRESSOR AND REFRIGERATING CYCLE DEVICE

#121
20170328618
2017-11-16

Lubricant blends to reduce refrigerant solubility

#122
20170284706
2017-10-05

Refrigeration cycle device

#123
20170284696
2017-10-05

Direct expansion air conditioning system with separate outdoor air latent cooling and return air sensible cooling arrangements

#124
20170268811
2017-09-21

Refrigeration cycle apparatus, and abnormality detection system for refrigeration cycle apparatus

#125
20170248352
2017-08-31

Chiller compressor oil conditioning

#126
20170234585
2017-08-17

Refrigerant cooling and lubrication system with refrigerant vapor vent line

#127
20170211860
2017-07-27

Additive composition for improvement of miscibility of lubricants in air-conditioning and refrigeration systems

#128
20170211855
2017-07-27

Oil distribution in multiple-compressor systems utilizing variable speed

#129
20170198951
2017-07-13

REFRIGERATION OIL REPLACEMENT DEVICE OF A TOTALLY HERMETIC COMPRESSOR IN A REFRIGERATION RECYCLING SYSTEM

#130
20170176076
2017-06-22

System and method for dynamically determining refrigerant film thickness and dynamically controlling refrigerant film thickness at rolling-element bearing of an oil free chiller

#131
20170174965
2017-06-22

Azeotrope to azeotrope-like composition containing 1-chloro-3,3,3-trifluoropropene and 1,1,1,3,3-pentafluoropropane

#132
20170167764
2017-06-15

Oil management in a refrigeration system—compressor oil cooler integrated into gascooler

#133
20170167763
2017-06-15

Heat Engine And Method For Operating A Heat Engine

#134
20170166831
2017-06-15

REFRIGERATOR OIL COMPOSITION, AND REFRIGERATION DEVICE

#135
20170146272
2017-05-25

Refrigerant cooling and lubrication system with refrigerant source access from an evaporator

#136
20170131011
2017-05-11

Method and apparatus for optimizing refrigeration systems

#137
20170097007
2017-04-06

Refrigerant lube system

#138
20170089620
2017-03-30

Refrigerant cooling and lubrication system

#139
20170089616
2017-03-30

REFRIGERATION CYCLE APPARATUS

#140
20170073602
2017-03-16

Refrigerator oil, and working fluid composition for refrigerators

#141
20170058174
2017-03-02

COMPOSITION FOR HEAT CYCLE SYSTEM AND HEAT CYCLE SYSTEM

#142
20170058173
2017-03-02

WORKING FLUID FOR HEAT CYCLE, COMPOSITION FOR HEAT CYCLE SYSTEM, AND HEAT CYCLE SYSTEM

#143
20170058172
2017-03-02

COMPOSITION FOR HEAT CYCLE SYSTEM AND HEAT CYCLE SYSTEM

#144
20170058171
2017-03-02

WORKING FLUID FOR HEAT CYCLE, COMPOSITION FOR HEAT CYCLE SYSTEM, AND HEAT CYCLE SYSTEM

#145
20170051960
2017-02-23

System for managing lubricant levels in tandem compressor assemblies of an HVAC system

#146
20170016439
2017-01-19

System for heating a compressor assembly in an HVAC system

#147
20160347982
2016-12-01

Composition for heat cycle system, and heat cycle system

#148
20160334147
2016-11-17

Desicating synthetic refrigeration oil composition for fluoro-olefin refrigeration systems

#149
20160319691
2016-11-03

Device and method for operating volumetric expansion machines

#150
20160290687
2016-10-06

Refrigerant device for increasing the thermodynamic efficiency

#151
20160290686
2016-10-06

Device that can be used with a refrigerant fluid for increasing the thermodynamic efficiency

#152
20160265820
2016-09-15

Compressor having lubricant management system for bearing life

#153
20160231035
2016-08-11

Air conditioner with oil separator and injection control thereof

#154
20160201951
2016-07-14

Air conditioner with oil level control for both gas and electric heat pump cycles

#155
20160153688
2016-06-02

Oil recovery for refrigeration system

#156
20160137895
2016-05-19

Use of alkyl perfluoroalkene ethers and mixtures thereof in high temperature heat pumps

#157
20160123635
2016-05-05

Oil return method for multi-split air conditioning in heating

#158
20160116196
2016-04-28

Oil separator and air conditioner including an oil separator

#159
20160047575
2016-02-18

Compressor bearing cooling

#160
20160040915
2016-02-11

Compressor bearing cooling

#161
20160018148
2016-01-21

Refrigeration apparatus

#162
20160010885
2016-01-14

System for managing lubricant levels in tandem compressor assemblies of an HVAC system

#163
20160010654
2016-01-14

Oil tank of turbo chiller compressor and turbo chiller compressor

#164
20160003510
2016-01-07

Lubrication and cooling system

#165
20150354863
2015-12-10

Refrigerant cooling and lubrication system with refrigerant vapor vent line

#166
20150330690
2015-11-19

Sensor failure error handling

#167
20150330651
2015-11-19

Accommodating CSSH for tandem compressor transitions

#168
20150253026
2015-09-10

Air conditioning system, control system therefor and air-conditioning control method

#169
20150184910
2015-07-02

Air conditioner

#170
20150167689
2015-06-18

Turbo compressor and turbo refrigerator

#171
20150128629
2015-05-14

Refrigeration apparatus

#172
20150128627
2015-05-14

Liquid level indicator, turbo compressor, and turbo refrigerator

#173
20150114013
2015-04-30

Air conditioner with oil separators and method for controlling the same

#174
20150101487
2015-04-16

Compressor and oil amount management system for compressor

#175
20150096621
2015-04-09

System for heating a compressor assembly in an HVAC system

#176
20150044070
2015-02-12

Oil balancing apparatus and refrigeration system with oil balancing apparatus

#177
20150020539
2015-01-22

Compressor and air conditioning apparatus using the same

#178
20140338380
2014-11-20

Heat pump device, air conditioner, and freezer

#179
20140130539
2014-05-15

Oil separator and air conditioner using the same

#180
20130000339
2013-01-03

Air-conditioning apparatus with oil return in a transcritical cycle

#181
20120227430
2012-09-13

Air-conditioning apparatus utilizing compressor preheating

#182
20120210742
2012-08-23

Air-conditioning apparatus

#183
20120192581
2012-08-02

Air conditioner using oil return operation based on outdoor air temperature

#184
20120041608
2012-02-16

Method and apparatus for optimizing refrigeration systems

#185
20120011876
2012-01-19

Discharge muffler and two-stage compressor including the same

#186
20110248206
2011-10-13

Refrigerator oil composition for carbon dioxide coolant

#187
20110239667
2011-10-06

AIR CONDITIONER AND METHOD OF CONTROLLING THE SAME

#188
20110155817
2011-06-30

EXPANSION VALVE

#189
20110083450
2011-04-14

Refrigerant System With Stator Heater

#190
20100251736
2010-10-07

REFRIGERANT CIRCUIT AND METHOD FOR MANAGING OIL THEREIN

#191
20100186439
2010-07-29

Fluid machine and refrigeration cycle apparatus

#192
20100175396
2010-07-15

Oil return in refrigerant system

#193
20100147018
2010-06-17

Refrigeration apparatus

#194
20100101270
2010-04-29

Hermetic compressor and refrigeration cycle having the same

#195
20100064700
2010-03-18

Refrigerant system oil accumulation removal

#196
20100050673
2010-03-04

OIL RETURN ALGORITHM FOR CAPACITY MODULATED COMPRESSOR

#197
20100037637
2010-02-18

Oil circulation observer for HVAC systems

#198
20090260376
2009-10-22

Air conditioner

#199
20080317619
2008-12-25

Tandem compressor system and method

#200
20080196445
2008-08-21

Variable speed compressor motor control for low speed operation

#201
20080134701
2008-06-12

Variable Compressor Oil Return

#202
20080075609
2008-03-27

Compressor

#203
20080008608
2008-01-10

Compressor, method for manufacturing the compressor, defroster of refrigerant circuit, and refrigerant unit

#204
20070272893
2007-11-29

Refrigerator Oil Composition for Carbon Dioxide Coolant

#205
20070214827
2007-09-20

Oil-free refrigerant circulation technology for air-conditioning and refrigeration system

#206
20070214813
2007-09-20

Cooling device with compressor cabinet heater and a control method

#207
20070151285
2007-07-05

Extraction apparatus

#208
20070006608
2007-01-11

Oil checking device for compressor of air conditioning system

#209
20060277930
2006-12-14

Lubricant return schemes for use in refrigerant cycle

#210
20060168994
2006-08-03

Compressor, method for manufacturing the compressor, defroster of refrigerant circuit, and refrigerant unit

#211
20060065011
2006-03-30

Vapor-compression refrigerant cycle system with ejector

#212
20060064992
2006-03-30

Refrigerating system having reciprocating compressor

#213
20060016203
2006-01-26

Refrigerating cycle device capable of ensuring oil return

#214
20050284156
2005-12-29

Lubricant return schemes for use in refrigerant cycle

#215
20050247073
2005-11-10

Drive unit for compressor and refrigerator

#216
20050210891
2005-09-29

Trans-critical refrigerating unit

#217
20050178146
2005-08-18

Supercritical refrigeration cycle

#218
20050138957
2005-06-30

Refrigerant cycle system

#219
20050126193
2005-06-16

Oil return control in refrigerant system

#220
20050103045
2005-05-19

Air conditioner

#221
20050103035
2005-05-19

Oil circulation observer for HVAC systems