ClassID:

159514

F25B2600/0253 - CPC Classification

Classification description:

Control issues; Compressor control by controlling speed with variable speed

Recent Application in this class:
#1
20260153274
2026-06-04

SYSTEMS AND METHODS FOR CONTROLLING A PURGE UNIT OF A VAPOR COMPRESSION SYSTEM

#2
20260139885
2026-05-21

COMPRESSOR CONTROL IN A VAPOR COMPRESSION COOLING CYCLE

#3
20260088240
2026-03-26

PREVENTING NUISANCE TRIPS OF GROUND-FAULT CIRCUIT INTERRUPTORS ELECTRICALLY COUPLED TO CLIMATE CONTROL SYSTEMS

#4
20260085851
2026-03-26

CONTROL METHOD AND CONTROL APPARATUS FOR MULTI-SPLIT AIR CONDITIONING SYSTEM, AND MULTI-SPLIT AIR CONDITIONING SYSTEM

#5
20260029176
2026-01-29

HVAC SYSTEM WITH BYPASS CONDUIT

#6
20260016197
2026-01-15

MODULAR CHILLER WITH PUMPED REFRIGERANT ECONOMIZER

#7
20260012114
2026-01-08

OPERATING A HOUSEHOLD APPLIANCE WITH A BLDC DRIVE MOTOR

#8
20260009574
2026-01-08

TEMPERATURE CONTROL SYSTEM, TEMPERATURE CONTROL METHOD, CONTROL DEVICE, AND COMPUTER PROGRAM

#9
20260009573
2026-01-08

METHOD AND APPARATUS FOR CONTROLLING MULTI-MODULE WATER CHILLING UNIT

#10
20250369674
2025-12-04

AIR CONDITIONING CONTROL SYSTEM AND AIR CONDITIONING CONTROL METHOD

#11
20250369673
2025-12-04

SYSTEMS AND/OR METHODS FOR CONTROLLING A COMPRESSOR AND/OR A FAN MOTOR

#12
20250354738
2025-11-20

Cold Climate Heat Pump with Vapor Injection System

#13
20250321031
2025-10-16

COOLING SYSTEM FOR A VARIABLE FREQUENCY DRIVE ASSOCIATED WITH A TRANSPORT REFRIGERATION UNIT

#14
20250290675
2025-09-18

WATER SOURCE HEAT PUMP SYSTEM

#15
20250289292
2025-09-18

MULTI-COMPRESSOR OIL MIGRATION MITIGATION CLIMATE SYSTEM

#16
20250271190
2025-08-28

COMPRESSOR CONTROL PROCESS FOR VARIABLE CASCADE REFRIGERATION SYSTEM

#17
20250251182
2025-08-07

REFRIGERATOR AND CONTROL METHOD THEREOF

#18
20250237419
2025-07-24

METHOD AND SYSTEM TO PREVENT FROST ACCUMULATION IN AN HVAC SYSTEM

#19
20250207836
2025-06-26

COMPRESSOR CONTROL IN A VAPOR COMPRESSION COOLING CYCLE

#20
20250207834
2025-06-26

CLIMATE CONTROL SYSTEM MINIMUM COMPRESSOR SPEED BASED ON REFRIGERANT LINE DIAMETER

#21
20250102202
2025-03-27

MULTI-FEED CHILLER-HEATER PRODUCTION MODULE AND METHOD OF CONTROLLING THE SAME

#22
20250102195
2025-03-27

MAGNETIC BEARING COMPRESSOR PROTECTION

#23
20250093084
2025-03-20

SYSTEMS AND METHODS FOR DETERMINING STARTUP PRESSURE RATIO FOR DYNAMIC COMPRESSORS

#24
20250067454
2025-02-27

System and Method for Heating and Cooling

#25
20250052466
2025-02-13

METHOD OF OPERATING A MOTOR COUPLED TO A MECHANICAL LOAD

#26
20250044007
2025-02-06

Compressor/Expander Machine

#27
20250015740
2025-01-09

MOTOR DRIVING DEVICE AND REFRIGERATION CYCLE-INCORPORATING DEVICE

#28
20250003659
2025-01-02

COOLING MECHANISM

#29
20240418169
2024-12-19

TWO-STAGE REFRIGERANT COMPRESSOR AND OPERATION METHOD THEREOF

#30
20240361058
2024-10-31

Automatic Maintenance and Flow Control of Heat Exchanger

#31
20240328694
2024-10-03

REFRIGERATION SYSTEM WITH VARIABLE SPEED COMPRESSOR

#32
20240318883
2024-09-26

DUAL-COMPRESSOR VAPOR CYCLE SYSTEM

#33
20240318656
2024-09-26

VOLUME RATIO CONTROL SYSTEM FOR A COMPRESSOR

#34
20240302088
2024-09-12

CRYOGENIC REFRIGERATION SYSTEM AND CRYOGENIC PUMP

#35
20240263855
2024-08-08

REFRIGERATION CYCLE DEVICE, CONTROL METHOD, AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM

#36
20240230197
2024-07-11

System and method for extending the operating range of a dynamic compressor

#37
20240230196
2024-07-11

AIR-CONDITIONING APPARATUS

#38
20240219090
2024-07-04

IMPROVED COOLING SYSTEM CONTROL

#39
20240210085
2024-06-27

AIR CONDITIONING SYSTEM WITH VAPOR INJECTION COMPRESSOR

#40
20240175615
2024-05-30

VAPOR COMPRESSION REFRIGERATION CYCLE DEVICE

#41
20240159439
2024-05-16

VARIABLE FREQUENCY AIR SOURCE HEAT PUMP COLD WATER UNIT AND PARALLEL CONTROL METHOD THEREOF

#42
20240125525
2024-04-18

REFRIGERATOR AND METHOD FOR CONTROLLING THE SAME

#43
20240110732
2024-04-04

Multi-feed chiller-heater production module and method of controlling the same

#44
20240060688
2024-02-22

FLUID TEMPERATURE CONTROL SYSTEM

#45
20240053077
2024-02-15

SYSTEMS AND METHODS FOR HUMIDITY CONTROL IN AN AIR CONDITIONING SYSTEM

#46
20240044564
2024-02-08

REFRIGERATION PLANT AND OPERATING METHOD THEREOF

#47
20240022070
2024-01-18

ACTIVE HARMONIC COMPENSATOR FOR VARIABLE SPEED CHILLERS

#48
20230417466
2023-12-28

Compressor Frequency Regulation Method, Control Apparatus, Heat Exchange Device and Electronic Device

#49
20230413850
2023-12-28

AUTOMATIC VISCOSITY CONTROL SYSTEM FOR FOOD PRODUCTS DISPENSED FROM FROZEN BEVERAGE AND SOFT-SERVE ICE CREAM EQUIPMENT

#50
20230392846
2023-12-07

BUILDING SYSTEM WITH AUTOMATIC CHILLER ANTI-SURGE CONTROL

#51
20230384012
2023-11-30

Systems and methods for determining startup pressure ratio for dynamic compressors

#52
20230382184
2023-11-30

Peak demand response operation of HVAC systems

#53
20230375242
2023-11-23

Systems and methods for modeling of chiller efficiency and determination of efficiency-based staging

#54
20230366601
2023-11-16

AIR CONDITIONER AND OPERATION METHOD THEREOF

#55
20230358454
2023-11-09

Sensor validation

#56
20230358448
2023-11-09

HVAC SYSTEM WITH BYPASS CONDUIT

#57
20230349583
2023-11-02

SYSTEM AND METHOD FOR OPERATING A COMPRESSOR OF AN HVAC SYSTEM

#58
20230341153
2023-10-26

MULTI-CAPACITY COMPRESSOR WITH VARIABLE SPEED DRIVE AND METHOD OF USE

#59
20230304715
2023-09-28

Refrigeration apparatus

#60
20230296302
2023-09-21

DEVICE MANAGEMENT SYSTEM FOR INVERTER COMPRESSOR

#61
20230272951
2023-08-31

Compression apparatus

#62
20230236242
2023-07-27

SYSTEM AND METHOD FOR CONTROLLING REFRIGERATION LOOP EXPANSION VALVE FLOW AND COMPRESSOR SPEED UNDER CONDITIONS OF RAPID HEAT LOAD CHANGES

#63
20230235935
2023-07-27

System and method for extending the operating range of a dynamic compressor

#64
20230228467
2023-07-20

SYSTEMS AND METHODS FOR CONTROLLING A PURGE UNIT OF A VAPOR COMPRESSION SYSTEM

#65
20230221030
2023-07-13

Air conditioner

#66
20230213229
2023-07-06

Air conditioner with variable speed compressor and variable speed fan

#67
20230204276
2023-06-29

Refrigeration cycle apparatus

#68
20230190074
2023-06-22

SHOE CARE APPARATUS AND METHOD FOR CONTROLLING THEREOF

#69
20230175748
2023-06-08

Refrigeration cycle apparatus

#70
20230175743
2023-06-08

Row split coil systems for HVAC systems

#71
20230168016
2023-06-01

Air conditioning unit for an accurate control of supply air temperature, and operation control method and operation control device for air conditioning unit

#72
20230168011
2023-06-01

Method of operating an electronic expansion valve in an air conditioner unit

#73
20230160618
2023-05-25

Systems and methods for humidity control in an air conditioning system

#74
20230152019
2023-05-18

Heat source unit and refrigeration apparatus

#75
20230124191
2023-04-20

MULTI-COMPRESSOR OIL MIGRATION MITIGATION CLIMATE SYSTEM

#76
20230122568
2023-04-20

Heat pump system and controller for controlling operation of the same

#77
20230114081
2023-04-13

Refrigerator having a cold air supply means and control method therefore

#78
20230078956
2023-03-16

Refrigerant system for cooling electronics

#79
20230073117
2023-03-09

System and method for operating an air conditioner unit having an auxiliary electric heater

#80
20230055507
2023-02-23

Air conditioning system with vapor injection compressor

#81
20230041855
2023-02-09

System and method for operating a variable speed compressor of an air conditioner unit

#82
20230035387
2023-02-02

Volume ratio control system for a compressor

#83
20230029703
2023-02-02

Volume ratio control system for a compressor

#84
20230026023
2023-01-26

Refrigeration System with Brushless DC Motor Compressor Drive

#85
20230019279
2023-01-19

SYSTEM AND METHOD FOR OPERATING A VARIABLE SPEED COMPRESSOR OF AN AIR CONDITIONER UNIT

#86
20230003429
2023-01-05

Sensor validation

#87
20220412626
2022-12-29

Surge prevention in a chiller with centrifugal compressor

#88
20220412625
2022-12-29

Refrigerant leak detection system and method

#89
20220412609
2022-12-29

Carbon dioxide overlapping type heating system, and control method therefor

#90
20220404093
2022-12-22

Hybrid mobile shellfish cooling system

#91
20220357087
2022-11-10

Gas bearing compressor backup power

#92
20220349636
2022-11-03

System and method for operational acoustic optimization of a variable speed compressor and refrigerator

#93
20220333838
2022-10-20

Refrigerator appliance with high freezer capacity

#94
20220290900
2022-09-15

Method for controlling refrigerating system using non-azeotropic mixed refrigerant

#95
20220275999
2022-09-01

REFRIGERATION AND/OR LIQUEFACTION METHOD, DEVICE AND SYSTEM

#96
20220228763
2022-07-21

Air conditioning with recovery wheel, dehumidification wheel, cooling coil, and secondary direct-expansion circuit

#97
20220203802
2022-06-30

Method and system for control of a hybrid power system for powering a transport climate control system

#98
20220202208
2022-06-30

METHOD AND SYSTEM TO VARY SUCTION TEMPERATURE TO POSTPONE FROST FORMATION

#99
20220196309
2022-06-23

Systems and methods for modeling of chiller efficiency and determination of efficiency-based staging

#100
20220186997
2022-06-16

Method and a system for preventing a freeze event using refrigerant temperature

#101
20220178591
2022-06-09

Chiller with an outdoor unit transferring heat to an indoor unit using carbon dioxide

#102
20220099347
2022-03-31

INFORMATION PROCESSING APPARATUS, AIR-CONDITIONING APPARATUS, AND AIR-CONDITIONING SYSTEM

#103
20220090834
2022-03-24

METHOD OF CONTROLLING REFRIGERATOR

#104
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

#105
20220065513
2022-03-03

Start-stop control systems and methods for gas foil bearing machine

#106
20220065512
2022-03-03

Method for optimizing the energetic consumption of a refrigerating machine and refrigerating machine implementing said method

#107
20220026128
2022-01-27

REFRIGERATION APPLIANCE AND METHOD FOR INITIALISING A DEFROSTING OPERATION IN A REFRIGERATION APPLIANCE

#108
20220018582
2022-01-20

Control unit for a refrigerant compressor

#109
20220011032
2022-01-13

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

#110
20220011031
2022-01-13

Systems and methods for humidity control in an air conditioning system

#111
20220011026
2022-01-13

Magnetic bearing compressor protection

#112
20210381736
2021-12-09

Thermal management system for directed energy weapon system

#113
20210372680
2021-12-02

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

#114
20210364209
2021-11-25

Reverse rotation prevention in centrifugal compressor

#115
20210341200
2021-11-04

Electric control assembly and air conditioner

#116
20210341198
2021-11-04

Compressor control circuit

#117
20210341197
2021-11-04

Methods and systems for operating HVAC systems in low load conditions

#118
20210333034
2021-10-28

Refrigerator and control method thereof

#119
20210333031
2021-10-28

SYSTEMS AND/OR METHODS FOR CONTROLLING A COMPRESSOR AND/OR A FAN MOTOR

#120
20210333028
2021-10-28

REFRIGERANT CHARGING SYSTEM AND METHOD FOR VARIABLE SPEED COMPRESSOR BASED AC SYSTEM

#121
20210333021
2021-10-28

Chiller with an outdoor unit transferring heat to an indoor unit using carbon dioxide

#122
20210325096
2021-10-21

Refrigerator and method of controlling the same

#123
20210310710
2021-10-07

Noise reduction method

#124
20210302092
2021-09-30

Method for controlling refrigerator to alternately cool two storage compartments

#125
20210302086
2021-09-30

Method and apparatus for preventing component malfunction using accelerometers

#126
20210281208
2021-09-09

Variable speed drive with secondary windings

#127
20210270510
2021-09-02

Building system with automatic chiller anti-surge control

#128
20210268874
2021-09-02

Sensor validation

#129
20210237535
2021-08-05

Peak demand response operation of HVAC systems

#130
20210222925
2021-07-22

Condenser with external subcooler

#131
20210207884
2021-07-08

Refrigerator and method for controlling refrigerator with improved cooling management

#132
20210199359
2021-07-01

Refrigerant leak detection system and method

#133
20210190386
2021-06-24

Systems for a chiller electrical enclosure

#134
20210180840
2021-06-17

Heating, ventilation, air-conditioning, and refrigeration system with variable speed compressor

#135
20210180839
2021-06-17

Heating, ventilation, air-conditioning, and refrigeration system with variable speed compressor

#136
20210180818
2021-06-17

System and method for heating and cooling

#137
20210156602
2021-05-27

Bypass line for refrigerant

#138
20210140695
2021-05-13

Automatic maintenance and flow control of heat exchanger

#139
20210140693
2021-05-13

Methods and systems for operating HVAC systems in low load conditions

#140
20210131712
2021-05-06

Refrigerator having a cold air supply means and control method therefore

#141
20210131680
2021-05-06

Limiting operation of a HVAC system for low-noise municipalities

#142
20210123648
2021-04-29

Method for operating a chiller

#143
20210116160
2021-04-22

Refrigeration appliance and method in which the rotational speed of the compressor is controlled based on the temperature of a first temperature zone independently of a temperature of other temperature zones

#144
20210095906
2021-04-01

Method and system for compressor modulation in non-communicating mode

#145
20210088260
2021-03-25

Modular waterside economizer for air-cooled chillers

#146
20210046800
2021-02-18

Peak demand response operation of HVAC systems

#147
20210036615
2021-02-04

DC to DC converter sourcing variable DC link voltage

#148
20210025380
2021-01-28

Gas compressor and method for controlling same

#149
20210018230
2021-01-21

Compressor chiller systems including thermoelectric modules, and corresponding control methods

#150
20200400355
2020-12-24

Refrigerator having variable speed compressor and control method thereof

#151
20200386433
2020-12-10

System and method for heating and cooling

#152
20200378668
2020-12-03

Lubricant quality management for a compressor

#153
20200378667
2020-12-03

Air conditioning system with vapor injection compressor

#154
20200363111
2020-11-19

Method and system for improving refrigeration system efficiency

#155
20200355418
2020-11-12

METHOD AND SYSTEM TO VARY SUCTION TEMPERATURE TO POSTPONE FROST FORMATION

#156
20200340716
2020-10-29

DC system controls

#157
20200331322
2020-10-22

Multi-compressor climate system

#158
20200309432
2020-10-01

Method for controlling a refrigeration device

#159
20200298655
2020-09-24

Air-conditioner control

#160
20200282794
2020-09-10

Device and method for controlling operation of transport refrigeration unit

#161
20200263912
2020-08-20

Control method and system in a refrigeration system and compressor of a refrigeration system

#162
20200256595
2020-08-13

Air conditioner system including refrigerant cycle circuit for oil flow blocking

#163
20200240693
2020-07-30

Vector drive for vapor compression systems

#164
20200240692
2020-07-30

Method and system for compressor modulation in non-communicating mode

#165
20200240689
2020-07-30

Method and apparatus for preventing component malfunction using accelerometers

#166
20200240685
2020-07-30

Systems and methods for controlling a purge unit of a vapor compression system

#167
20200232686
2020-07-23

Multi power converter unit for a trailer refrigeration unit

#168
20200224929
2020-07-16

Two step oil motive eductor system

#169
20200217569
2020-07-09

Refrigeration system with brushless DC motor compressor drive

#170
20200208894
2020-07-02

Refrigerator and method for controlling a motor driving a compressor of the refrigerator

#171
20200149772
2020-05-14

Control method for air conditioning system, and air conditioning system

#172
20200132074
2020-04-30

Rotary compressors with variable speed and volume control

#173
20200116406
2020-04-16

Methods and systems for preventing premature compressor failure from improper operation

#174
20200072520
2020-03-05

Variable speed compressor based AC system and control method

#175
20200067441
2020-02-27

METHOD FOR CONTROLLING THE SPEED OF A MOTOR

#176
20200041183
2020-02-06

Method for operating a chiller

#177
20200041172
2020-02-06

APPARATUS FOR AIR-CONDITIONING OF ENVIRONMENTS IN THE MARINE FIELD

#178
20200041171
2020-02-06

Method for air-conditioning of environments in the marine field

#179
20200036304
2020-01-30

Power stealing system with an electric load

#180
20200025409
2020-01-23

Hybrid tandem compressor system and method of use

#181
20200018531
2020-01-16

System and method for power optimizing control of multi-zone heat pumps

#182
20190390886
2019-12-26

System and method of controlling a variable-capacity compressor and a variable-capacity fan using a two-stage thermostat

#183
20190390882
2019-12-26

Refrigeration Appliance And Method For The Operation Thereof

#184
20190383540
2019-12-19

Control method for refrigerator

#185
20190383539
2019-12-19

Lubricant quality management for a compressor

#186
20190383535
2019-12-19

Air-conditioning apparatus

#187
20190376733
2019-12-12

Heat source unit and air conditioner having the heat source unit

#188
20190338994
2019-11-07

DC varaiable speed compressor control method and control system

#189
20190331379
2019-10-31

Variable speed compressor based AC system and control method

#190
20190323751
2019-10-24

Variable speed drive control for chiller coast-through

#191
20190323750
2019-10-24

Methods and systems for operating HVAC systems in low load conditions

#192
20190323722
2019-10-24

Method and apparatus for re-heat dehumidification utilizing a variable speed compressor system

#193
20190323717
2019-10-24

Control method for heating operation of air-conditioner based on coil temperature and indoor fan speed

#194
20190310004
2019-10-10

METHOD FOR OPERATING A ROTATIONAL-SPEED-VARIABLE REFRIGERANT COMPRESSOR

#195
20190299132
2019-10-03

Method for controlling a vapour compression system during gas bypass valve malfunction

#196
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

#197
20190293331
2019-09-26

Refrigeration cycle apparatus

#198
20190287147
2019-09-19

Variable refrigerant flow system with electricity consumption apportionment

#199
20190277530
2019-09-12

Thermostat with user interface features

#200
20190271489
2019-09-05

Compressor chiller systems including thermoelectric modules, and corresponding control methods

#201
20190264972
2019-08-29

Refrigerator and control method thereof

#202
20190263218
2019-08-29

Transport refrigeration system and method of operation

#203
20190257564
2019-08-22

Refrigeration cycle apparatus

#204
20190257563
2019-08-22

Method of controlling electronic expansion valve of air-conditioner

#205
20190249894
2019-08-15

DC varaiable speed compressor control method and control system

#206
20190239533
2019-08-08

Machine and method for processing liquid or semi liquid food products

#207
20190234662
2019-08-01

Compressor control circuit

#208
20190226707
2019-07-25

System and method for heating and cooling

#209
20190226706
2019-07-25

Evaporator coil protection for HVAC systems

#210
20190219316
2019-07-18

Scroll unloading detection system

#211
20190219280
2019-07-18

Limiting operation of a HVAC system for low-noise municipalities

#212
20190212045
2019-07-11

Multi-split system and liquid return prevention control method thereof

#213
20190203997
2019-07-04

Refrigeration apparatus

#214
20190203996
2019-07-04

Capacity control technique with motor temperature override

#215
20190203995
2019-07-04

Refrigeration device having condenser unit connected to compressor unit with on-site pipe interposed therebetween and remote from the compressor unit

#216
20190178548
2019-06-13

Air conditioning systems and methods with cooling capacity modulation via fixed pump operation and variable condenser fan operation

#217
20190170404
2019-06-06

Multi-capacity compressor with variable speed drive and method of use

#218
20190170378
2019-06-06

Regenerative air conditioner

#219
20190162459
2019-05-30

Method for operating a variable-speed refrigerant compressor

#220
20190154322
2019-05-23

Refrigeration cycle apparatus capable of performing refrigerant recovery operation and controlling blower

#221
20190154310
2019-05-23

Heat pump system having CO2 as the first heat pump medium and water as the second heat pump medium

#222
20190154024
2019-05-23

Method for protecting an electric motor of a device with a motor driven consumer with a continuous capacity control system and choice of such a motor

#223
20190145681
2019-05-16

Compressor unit, refrigeration circuit comprising the same and method of operating a compressor unit

#224
20190140553
2019-05-09

AC/DC CONVERTER, MODULE, POWER CONVERSION DEVICE, AND AIR CONDITIONING APPARATUS

#225
20190137156
2019-05-09

Control mechanism for climate control unit with multiple stages

#226
20190137155
2019-05-09

Chiller system, method for obtaining middle water temperature and control method thereof

#227
20190136742
2019-05-09

Systems and methods for controlling a variable speed water pump

#228
20190120528
2019-04-25

System and method for cryogenic cooling

#229
20190113264
2019-04-18

Refrigeration device and controller for refrigeration device

#230
20190101314
2019-04-04

Capacity staging system for multiple compressors

#231
20190101313
2019-04-04

VEHICULAR AIR CONDITIONING SYSTEMS

#232
20190097534
2019-03-28

DC to DC converter sourcing variable DC link voltage

#233
20190093928
2019-03-28

Multi-split HVAC system

#234
20190074789
2019-03-07

DC to DC converter sourcing variable DC link voltage

#235
20190072308
2019-03-07

Refrigeration system with brushless DC motor compressor drive

#236
20190072301
2019-03-07

Domestic refrigeration appliance with a coolant circuit and method for operating a domestic refrigeration appliance with a coolant circuit

#237
20190072284
2019-03-07

Heat-pump air-conditioning hot-water supply device

#238
20190063806
2019-02-28

Air-conditioning apparatus

#239
20190063805
2019-02-28

Control system for multiple compressors

#240
20190049130
2019-02-14

Hybrid tandem compressor system and method of use

#241
20190047353
2019-02-14

Air-conditioner control

#242
20190041099
2019-02-07

Refrigeration apparatus and method for controlling the same

#243
20190032981
2019-01-31

Air conditioning system with vapor injection compressor

#244
20190030984
2019-01-31

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