of the compressor motor

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F25B2700/151

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FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F25Refrigeration F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS COMBINED HEATING AND REFRIGERATION SYSTEMS HEAT-PUMP SYSTEMS F25B2700/00Sensing or detecting of parameters Sensors therefor

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F25B2700/151of the compressor motor

Industries

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Patents Grantslast 30 patents

Information Patent Grant
Compressor device and method for controlling such a compressor device
- Patent number 12,163,526
- Issue date Dec 10, 2024
- Atlas Copco Airpower, naamloze vennootschap
- Thomas Vandewal
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Buck-converter-based drive circuits for driving motors of compresso...
- Patent number 12,136,872
- Issue date Nov 5, 2024
- Copeland LP
- Joseph G. Marcinkiewicz
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method for optimizing the energetic consumption of a refrigerating...
- Patent number 12,085,322
- Issue date Sep 10, 2024
- Carel Industries S.p.A.
- Mattia Morandin
- G05 - CONTROLLING REGULATING
Information Patent Grant
Refrigeration and heat pump systems with pressure exchangers
- Patent number 12,085,324
- Issue date Sep 10, 2024
- Energy Recovery, Inc.
- Azam Mihir Thatte
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Grant
Heat pump systems with pressure exchangers
- Patent number 12,007,154
- Issue date Jun 11, 2024
- Energy Recovery, Inc.
- Azam Mihir Thatte
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Grant
Utilizing wet fracturing sand for hydraulic fracturing operations
- Patent number RE50007
- Issue date Jun 11, 2024
- TYPHON TECHNOLOGY SOLUTIONS (U.S.), LLC
- Jeffrey G. Morris
Information Patent Grant
Control device, refrigerator, control method, and abnormality detec...
- Patent number 11,994,325
- Issue date May 28, 2024
- MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
- Ryosuke Suemitsu
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Heat pump apparatus with compressor heating control
- Patent number 11,971,200
- Issue date Apr 30, 2024
- Mitsubishi Electric Corporation
- Yuichi Shimizu
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
System and method for determining efficiency of chillers
- Patent number 11,959,678
- Issue date Apr 16, 2024
- Tyco Fire & Security GmbH
- Leland John Szewerenko
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Drive circuit for a variable speed fan motor
- Patent number 11,959,679
- Issue date Apr 16, 2024
- Regal Beloit America, Inc.
- Paul S. Mullin
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Recycle information management system
- Patent number 11,953,247
- Issue date Apr 9, 2024
- Daikin Industries, Ltd.
- Takahiro Yamaguchi
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Power converting apparatus and air conditioner including the same
- Patent number 11,940,194
- Issue date Mar 26, 2024
- LG Electronics Inc.
- Jinho Cho
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Refrigeration and heat pump systems with pressure exchangers
- Patent number 11,913,696
- Issue date Feb 27, 2024
- Energy Recovery, Inc.
- Azam Mihir Thatte
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Grant
Method and system for controlling compressor temperature
- Patent number 11,906,225
- Issue date Feb 20, 2024
- Charles A. Cluff
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Refrigerator having a cold air supply means and control method ther...
- Patent number 11,885,547
- Issue date Jan 30, 2024
- LG Electronics Inc.
- Myungjin Chung
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Transport battery for use with portable thermal management system
- Patent number 11,865,035
- Issue date Jan 9, 2024
- Zoll Circulation, Inc.
- Jeremy Thomas Dabrowiak
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
System and method for predicting a surge of a centrifugal refrigera...
- Patent number 11,835,053
- Issue date Dec 5, 2023
- Carrier Corporation
- Jialong Wang
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Refrigeration and heat pump systems with pressure exchangers
- Patent number 11,781,789
- Issue date Oct 10, 2023
- Energy Recovery, Inc.
- Azam Mihir Thatte
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Grant
Environmental control unit including maintenance prediction
- Patent number 11,774,128
- Issue date Oct 3, 2023
- Robert Bosch LLC
- Goncalo Costa
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Compressor fault diagnostic apparatus and system
- Patent number 11,754,073
- Issue date Sep 12, 2023
- LG Electronics Inc.
- Sehoon Kim
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Variable speed compressor based AC system and control method
- Patent number 11,719,477
- Issue date Aug 8, 2023
- Jianliang Zhang
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Environmental control unit including maintenance prediction
- Patent number 11,703,241
- Issue date Jul 18, 2023
- Robert Bosch LLC
- Goncalo Costa
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Control of refrigeration and heat pump systems that include pressur...
- Patent number 11,692,743
- Issue date Jul 4, 2023
- Energy Recovery, Inc.
- Azam Mihir Thatte
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Grant
Cooling system that comprises multiple cooling apparatus and reduce...
- Patent number 11,656,016
- Issue date May 23, 2023
- Ebara Refrigeration Equipment & Systems Co., Ltd.
- Akihiro Ito
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Start-stop control systems and methods for gas foil bearing machine
- Patent number 11,644,227
- Issue date May 9, 2023
- Emerson Climate Technologies, Inc.
- Michael D. Oakley
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Variable speed drive input current control
- Patent number 11,644,226
- Issue date May 9, 2023
- Johnson Controls Tyco IP Holdings LLP
- Ajit W. Kane
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Determination device for refrigerant quality
- Patent number 11,609,011
- Issue date Mar 21, 2023
- Daikin Industries, Ltd.
- Shigeharu Taira
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
System and method for determining efficiency of chillers
- Patent number 11,592,224
- Issue date Feb 28, 2023
- Johnson Controls Tyco IP Holdings LLP
- Leland John Szewerenko
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Compressor floodback protection system
- Patent number 11,573,037
- Issue date Feb 7, 2023
- Emerson Climate Technologies, Inc.
- Troy Richard Brostrom
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Refrigerator having a cold air supply means and control method ther...
- Patent number 11,549,736
- Issue date Jan 10, 2023
- LG Electronics Inc.
- Myungjin Chung
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...

Patents Applicationslast 30 patents

Information Patent Application
CONTROL OF REFRIGERATION AND HEAT PUMP SYSTEMS THAT INCLUDE PRESSUR...
- Publication number 20240418416
- Publication date Dec 19, 2024
- Energy Recovery, Inc.
- Azam Mihir Thatte
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Application
REFRIGERATION AND HEAT PUMP SYSTEMS WITH PRESSURE EXCHANGERS
- Publication number 20240393017
- Publication date Nov 28, 2024
- Energy Recovery, Inc.
- Azam Mihir Thatte
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Application
CRYOGENIC REFRIGERATION SYSTEM AND CRYOGENIC PUMP
- Publication number 20240302088
- Publication date Sep 12, 2024
- Leybold Dresden GmbH
- Michael Hampel
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
HEAT PUMP SYSTEMS WITH PRESSURE EXCHANGERS
- Publication number 20240263846
- Publication date Aug 8, 2024
- Energy Recovery, Inc.
- Azam Mihir Thatte
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Application
COMPRESSOR VOLTAGE PROTECTION MODULE ENABLING BASED ON SOFT STARTER...
- Publication number 20240077240
- Publication date Mar 7, 2024
- Copeland LP
- Chetan Avinash SOWANI
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
HEAT PUMP SYSTEMS WITH PRESSURE EXCHANGERS
- Publication number 20240035712
- Publication date Feb 1, 2024
- Energy Recovery, Inc.
- Azam Mihir Thatte
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Application
REFRIGERATOR AND CONTROL METHOD THEREOF
- Publication number 20230349609
- Publication date Nov 2, 2023
- LG ELECTRONICS INC.
- Sangil Lee
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
METHOD FOR POWER LIMITING AN APPLIANCE MOTOR
- Publication number 20230336097
- Publication date Oct 19, 2023
- Haier US Appliance Solutions, Inc.
- Joseph Wilson Latham
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
DEVICE MANAGEMENT SYSTEM FOR INVERTER COMPRESSOR
- Publication number 20230296302
- Publication date Sep 21, 2023
- Mitsubishi Electric Corporation
- Yuki TAMURA
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
CONTROL OF REFRIGERATION AND HEAT PUMP SYSTEMS THAT INCLUDE PRESSUR...
- Publication number 20230288101
- Publication date Sep 14, 2023
- Energy Recovery, Inc.
- Azam Mihir Thatte
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Application
CURRENT REGULATION IN AIR CONDITIONING SYSTEMS
- Publication number 20230213256
- Publication date Jul 6, 2023
- Carrier Corporation
- Jaegue Shin
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
REFRIGERATION AND HEAT PUMP SYSTEMS WITH PRESSURE EXCHANGERS
- Publication number 20230213245
- Publication date Jul 6, 2023
- Energy Recovery, Inc.
- Azam Mihir Thatte
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Application
SYSTEM AND METHOD FOR DETERMINING EFFICIENCY OF CHILLERS
- Publication number 20230204269
- Publication date Jun 29, 2023
- Johnson Controls Tyco IP Holdings LLP
- Leland John Szewerenko
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
SHOE CARE APPARATUS AND METHOD FOR CONTROLLING THEREOF
- Publication number 20230190074
- Publication date Jun 22, 2023
- Samsung Electronics Co., Ltd.
- Heemoon JEONG
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
REFRIGERATOR HAVING A COLD AIR SUPPLY MEANS AND CONTROL METHOD THER...
- Publication number 20230114081
- Publication date Apr 13, 2023
- LG ELECTRONICS INC.
- Myungjin CHUNG
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
COMPRESSOR RETURN AIR DRYNESS DETECTION METHOD, APPARATUS, DEVICE,...
- Publication number 20230079856
- Publication date Mar 16, 2023
- Yusheng ZHANG
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
SYSTEM AND METHOD FOR OPERATING A VARIABLE SPEED COMPRESSOR OF AN A...
- Publication number 20230019279
- Publication date Jan 19, 2023
- Haier US Appliance Solutions, Inc.
- Joshua Duane Longenecker
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
HEAT PUMP APPARATUS
- Publication number 20220412612
- Publication date Dec 29, 2022
- Mitsubishi Electric Corporation
- Yuichi SHIMIZU
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
HEAT PUMP DEVICE, HEAT PUMP SYSTEM, AIR CONDITIONER, AND REFRIGERAT...
- Publication number 20220397323
- Publication date Dec 15, 2022
- Mitsubishi Electric Corporation
- Takashi YAMAKAWA
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
CONTROL OF REFRIGERATION AND HEAT PUMP SYSTEMS THAT INCLUDE PRESSUR...
- Publication number 20220397324
- Publication date Dec 15, 2022
- Energy Recovery, Inc.
- Azam Mihir Thatte
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
GAS BEARING COMPRESSOR BACKUP POWER
- Publication number 20220357087
- Publication date Nov 10, 2022
- TRANE INTERNATIONAL INC.
- Seth M. McGill
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
METHOD FOR OPTIMIZING THE ENERGETIC CONSUMPTION OF A REFRIGERATING...
- Publication number 20220065512
- Publication date Mar 3, 2022
- CAREL INDUSTRIES S.P.A.
- Mattia MORANDIN
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
START-STOP CONTROL SYSTEMS AND METHODS FOR GAS FOIL BEARING MACHINE
- Publication number 20220065513
- Publication date Mar 3, 2022
- Emerson Climate Technologies, Inc.
- Michael D. Oakley
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
ABNORMALITY DETERMINATION DEVICE, FREEZING DEVICE INCLUDING THIS AB...
- Publication number 20220042730
- Publication date Feb 10, 2022
- DAIKIN INDUSTRIES, LTD.
- Kiichirou SATOU
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
CONTROL DEVICE, REFRIGERATOR, CONTROL METHOD, AND ABNORMALITY DETEC...
- Publication number 20210302084
- Publication date Sep 30, 2021
- MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
- Ryosuke SUEMITSU
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
Environmental Control Unit including Maintenance Prediction
- Publication number 20210293433
- Publication date Sep 23, 2021
- ROBERT BOSCH LLC
- Goncalo Costa
- G05 - CONTROLLING REGULATING
Information Patent Application
Environmental Control Unit including Maintenance Prediction
- Publication number 20210293432
- Publication date Sep 23, 2021
- ROBERT BOSCH LLC
- Goncalo Costa
- G05 - CONTROLLING REGULATING
Information Patent Application
COMPRESSOR FOR HEAT EXCHANGE SYSTEM, HEAT EXCHANGE SYSTEM AND METHO...
- Publication number 20210285707
- Publication date Sep 16, 2021
- Carrier Corporation
- Jin Wang
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
POWER CONVERTING APPARATUS AND AIR CONDITIONER INCLUDING THE SAME
- Publication number 20210247120
- Publication date Aug 12, 2021
- LG ELECTRONICS INC.
- Jinho CHO
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
SYSTEM AND METHOD FOR PREDICTING A SURGE OF A CENTRIFUGAL REFRIGERA...
- Publication number 20210215161
- Publication date Jul 15, 2021
- Carrier Corporation
- Jialong Wang
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...

of the compressor motor

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Compressor device and method for controlling such a compressor device

Buck-converter-based drive circuits for driving motors of compresso...

Method for optimizing the energetic consumption of a refrigerating...

Refrigeration and heat pump systems with pressure exchangers

Heat pump systems with pressure exchangers

Utilizing wet fracturing sand for hydraulic fracturing operations

Control device, refrigerator, control method, and abnormality detec...

Heat pump apparatus with compressor heating control

System and method for determining efficiency of chillers

Drive circuit for a variable speed fan motor

Recycle information management system

Power converting apparatus and air conditioner including the same

Refrigeration and heat pump systems with pressure exchangers

Method and system for controlling compressor temperature

Refrigerator having a cold air supply means and control method ther...

Transport battery for use with portable thermal management system

System and method for predicting a surge of a centrifugal refrigera...

Refrigeration and heat pump systems with pressure exchangers

Environmental control unit including maintenance prediction

Compressor fault diagnostic apparatus and system

Variable speed compressor based AC system and control method

Environmental control unit including maintenance prediction

Control of refrigeration and heat pump systems that include pressur...

Cooling system that comprises multiple cooling apparatus and reduce...

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

Variable speed drive input current control

Determination device for refrigerant quality

System and method for determining efficiency of chillers

Compressor floodback protection system

Refrigerator having a cold air supply means and control method ther...

Patents Applicationslast 30 patents

CONTROL OF REFRIGERATION AND HEAT PUMP SYSTEMS THAT INCLUDE PRESSUR...

REFRIGERATION AND HEAT PUMP SYSTEMS WITH PRESSURE EXCHANGERS

CRYOGENIC REFRIGERATION SYSTEM AND CRYOGENIC PUMP

HEAT PUMP SYSTEMS WITH PRESSURE EXCHANGERS

COMPRESSOR VOLTAGE PROTECTION MODULE ENABLING BASED ON SOFT STARTER...

HEAT PUMP SYSTEMS WITH PRESSURE EXCHANGERS

REFRIGERATOR AND CONTROL METHOD THEREOF

METHOD FOR POWER LIMITING AN APPLIANCE MOTOR

DEVICE MANAGEMENT SYSTEM FOR INVERTER COMPRESSOR

CONTROL OF REFRIGERATION AND HEAT PUMP SYSTEMS THAT INCLUDE PRESSUR...

CURRENT REGULATION IN AIR CONDITIONING SYSTEMS

REFRIGERATION AND HEAT PUMP SYSTEMS WITH PRESSURE EXCHANGERS

SYSTEM AND METHOD FOR DETERMINING EFFICIENCY OF CHILLERS

SHOE CARE APPARATUS AND METHOD FOR CONTROLLING THEREOF

REFRIGERATOR HAVING A COLD AIR SUPPLY MEANS AND CONTROL METHOD THER...

COMPRESSOR RETURN AIR DRYNESS DETECTION METHOD, APPARATUS, DEVICE,...

SYSTEM AND METHOD FOR OPERATING A VARIABLE SPEED COMPRESSOR OF AN A...

HEAT PUMP APPARATUS

HEAT PUMP DEVICE, HEAT PUMP SYSTEM, AIR CONDITIONER, AND REFRIGERAT...

CONTROL OF REFRIGERATION AND HEAT PUMP SYSTEMS THAT INCLUDE PRESSUR...

GAS BEARING COMPRESSOR BACKUP POWER

METHOD FOR OPTIMIZING THE ENERGETIC CONSUMPTION OF A REFRIGERATING...

START-STOP CONTROL SYSTEMS AND METHODS FOR GAS FOIL BEARING MACHINE

ABNORMALITY DETERMINATION DEVICE, FREEZING DEVICE INCLUDING THIS AB...

CONTROL DEVICE, REFRIGERATOR, CONTROL METHOD, AND ABNORMALITY DETEC...

Environmental Control Unit including Maintenance Prediction

Environmental Control Unit including Maintenance Prediction

COMPRESSOR FOR HEAT EXCHANGE SYSTEM, HEAT EXCHANGE SYSTEM AND METHO...

POWER CONVERTING APPARATUS AND AIR CONDITIONER INCLUDING THE SAME

SYSTEM AND METHOD FOR PREDICTING A SURGE OF A CENTRIFUGAL REFRIGERA...