Motor speed control of compressors or fans

Industry

CPC
Y02B40/32

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Parent Industries

YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS Y02Climate change prevention Y02BINDEXING SCHEME RELATING TO CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS Y02B40/00Technologies aiming at improving the efficiency of home appliances

Current Industry

Y02B40/32Motor speed control of compressors or fans

Industries

Patents Grantslast 30 patents

Information Patent Grant
Refrigeration appliance fan
- Patent number 10,837,694
- Issue date Nov 17, 2020
- Whirlpool Corporation
- Adam Gary
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Domestic refrigeration appliance with a coolant circuit and method...
- Patent number 10,801,759
- Issue date Oct 13, 2020
- BSH Hausgeraete GmbH
- Tommy Beckmann
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Storage unit and tempering system for a storage unit
- Patent number 10,697,672
- Issue date Jun 30, 2020
- Bitzer Kuehlmaschinenbau GmbH
- Kari Saikkonen
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Ventilation controller for equipment enclosure
- Patent number 10,670,315
- Issue date Jun 2, 2020
- Schroff Technologies International, Inc.
- Richard De Felice
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Grant
Refrigerated food bar arrangement and a cooling system for such a f...
- Patent number 10,499,752
- Issue date Dec 10, 2019
- PICADELI AB
- Markus Palmnäs
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
Information Patent Grant
Refrigerator and method for controlling constant temperature thereof
- Patent number 10,473,388
- Issue date Nov 12, 2019
- LG Electronics Inc.
- Yong Hyeon Cho
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Control method for refrigerator
- Patent number 10,429,112
- Issue date Oct 1, 2019
- LG Electronics Inc.
- Namhun Kim
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Refrigerated display case
- Patent number 10,420,425
- Issue date Sep 24, 2019
- AHT Cooling Systems GmbH
- Reinhold Resch
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Refrigerator having a refrigeration system with first and second co...
- Patent number 10,288,335
- Issue date May 14, 2019
- Electrolux Home Products Corporation N.V.
- Andreas Aschan
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Grant
Methods and apparatus for determining power consumption
- Patent number 10,240,841
- Issue date Mar 26, 2019
- LG Electronics Inc.
- Sangbok Choi
- D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...
Information Patent Grant
Ice compartment assembly for refrigerator
- Patent number 10,203,142
- Issue date Feb 12, 2019
- Whirlpool Corporation
- Tim L. Coulter
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Refrigeration device having automatic defrosting and method for ope...
- Patent number 10,203,147
- Issue date Feb 12, 2019
- BSH Hausgeräte GmbH
- Jochen Härlen
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Robust fixed-sequence control method and appliance for exceptional...
- Patent number 10,184,692
- Issue date Jan 22, 2019
- Whirlpool Corporation
- Alberto R. Gomes
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Net heat load compensation control method and appliance for tempera...
- Patent number 10,145,589
- Issue date Dec 4, 2018
- Whirlpool Corporation
- Alberto R. Gomes
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Refrigeration system having a variable speed compressor
- Patent number 10,072,876
- Issue date Sep 11, 2018
- Thermo Fisher Scientific (Asheville) LLC
- Qi Wang
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Ice maker for a refrigeration appliance
- Patent number 10,036,585
- Issue date Jul 31, 2018
- Electrolux Home Products, Inc.
- Thomas W. McCollough
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Refrigerator and method of controlling the same
- Patent number 9,982,927
- Issue date May 29, 2018
- LG Electronics Inc.
- Sangbong Lee
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Multiple evaporator control using PWM valve/compressor
- Patent number 9,970,698
- Issue date May 15, 2018
- Whirlpool Corporation
- Alberto Regio Gomes
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Cooling equipment, temperature control system, air conditioning sys...
- Patent number 9,964,351
- Issue date May 8, 2018
- SHARP KABUSHIKI KAISHA
- Takashi Yamashita
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Refrigerator and control method thereof
- Patent number 9,933,188
- Issue date Apr 3, 2018
- LG Electronics Inc.
- Hyoungkeun Lim
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Container for refrigerating machine
- Patent number 9,903,633
- Issue date Feb 27, 2018
- DENSO CORPORATION
- Takehiro Kurata
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Thawing appliance
- Patent number 9,895,022
- Issue date Feb 20, 2018
- Electrolux Professional SpA
- Omar Fracas
- A23 - FOODS OR FOODSTUFFS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
Information Patent Grant
Refrigerator and operating method thereof
- Patent number 9,863,688
- Issue date Jan 9, 2018
- LG Electronics Inc.
- Byoungsuk Choi
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Refrigeration system having a variable speed compressor
- Patent number 9,835,360
- Issue date Dec 5, 2017
- Thermo Fisher Scientific (Asheville) LLC
- Qi Wang
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Refrigerator and method for controlling the same
- Patent number 9,816,749
- Issue date Nov 14, 2017
- LG Electronics Inc.
- Hyoung Keun Lim
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Refrigerator
- Patent number 9,746,226
- Issue date Aug 29, 2017
- LG Electronics Inc.
- Sangbong Lee
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Refrigeration device for container
- Patent number 9,718,612
- Issue date Aug 1, 2017
- Daikin Industries, Ltd.
- Akitoshi Ueno
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Higher efficiency appliance employing thermal load shifting in refr...
- Patent number 9,714,785
- Issue date Jul 25, 2017
- Whirlpool Corporation
- Nihat O. Cur
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Dual capillary tube / heat exchanger in combination with cycle prim...
- Patent number 9,696,077
- Issue date Jul 4, 2017
- Whirlpool Corporation
- Alberto Regio Gomes
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Ice compartment assembly for refrigerator
- Patent number 9,683,769
- Issue date Jun 20, 2017
- Whirlpool Corporation
- Tim L. Coulter
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

Information Patent Application
Refrigeration System Having A Variable Speed Compressor
- Publication number 20180347862
- Publication date Dec 6, 2018
- THERMO FISHER SCIENTIFIC (ASHEVILLE) LLC
- Qi Wang
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
Refrigeration System Having A Variable Speed Compressor
- Publication number 20180347861
- Publication date Dec 6, 2018
- THERMO FISHER SCIENTIFIC (ASHEVILLE) LLC
- Qi Wang
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
ICE MAKER FOR A REFRIGERATION APPLIANCE
- Publication number 20180328642
- Publication date Nov 15, 2018
- ELECTROLUX HOME PRODUCTS, INC.
- Thomas W. McCollough
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
COOLING EQUIPMENT, TEMPERATURE CONTROL SYSTEM, AIR CONDITIONING SYS...
- Publication number 20180087830
- Publication date Mar 29, 2018
- Sharp Kabushiki Kaisha
- Takashi YAMASHITA
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Application
REFRIGERATION SYSTEM HAVING A VARIABLE SPEED COMPRESSOR
- Publication number 20170314821
- Publication date Nov 2, 2017
- THERMO FISHER SCIENTIFIC (ASHEVILLE) LLC
- Qi Wang
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
REFRIGERATOR ICE COMPARTMENT LATCH AND COVER
- Publication number 20140338386
- Publication date Nov 20, 2014
- Whirlpool Corporation
- DEAN A. MARTIN
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
REFRIGERATOR AND METHOD OF OPERATING REFRIGERATION SYSTEM
- Publication number 20140318161
- Publication date Oct 30, 2014
- ELECTROLUX HOME PRODUCTS CORPORATION N.V.
- Richard Furberg
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
METHOD FOR CONTROLLING REFRIGERATOR
- Publication number 20140284024
- Publication date Sep 25, 2014
- LG ELECTRONICS INC.
- Jaehoon SHIN
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
CONTROL SYSTEM FOR A DUAL EVAPORATOR REFRIGERATION SYSTEM
- Publication number 20140260409
- Publication date Sep 18, 2014
- GENERAL ELECTRIC COMPANY
- Brent Alden Junge
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
NET HEAT LOAD COMPENSATION CONTROL METHOD AND APPLIANCE FOR TEMPERA...
- Publication number 20140260377
- Publication date Sep 18, 2014
- Whirlpool Corporation
- Alberto R. Gomes
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
ROBUST FIXED-SEQUENCE CONTROL METHOD AND APPLIANCE FOR EXCEPTIONAL...
- Publication number 20140260378
- Publication date Sep 18, 2014
- Whirlpool Corporation
- Alberto R. Gomes
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
DUAL SUCTION COMPRESSOR WITH RAPID SUCTION PORT SWITCHING MECHANISM...
- Publication number 20140238059
- Publication date Aug 28, 2014
- Whirlpool Corporation
- Guolian Wu
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
ENTHALPY BASED CONTROL FOR A REFRIGERATION APPLIANCE
- Publication number 20140230464
- Publication date Aug 21, 2014
- GENERAL ELECTRIC COMPANY
- Bahman Abbasi
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
HIGHER EFICIENCY APPLIANCE EMPLOYING THERMAL LOAD SHIFTING IN REFRI...
- Publication number 20140202187
- Publication date Jul 24, 2014
- Whirlpool Corporation
- NIHAT O. CUR
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
REFRIGERATOR CONTROL SYSTEM AND METHOD
- Publication number 20140165632
- Publication date Jun 19, 2014
- GENERAL ELECTRIC COMPANY
- Bahman Abbasi
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
METHOD FOR CONTROLLING THE DEFROST OF AN EVAPORATOR IN A REFRIGERAT...
- Publication number 20140165629
- Publication date Jun 19, 2014
- Whirlpool Corporation
- MARIAGRAZIA DAURIA
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
COOLING EQUIPMENT, TEMPERATURE CONTROL SYSTEM, AIR CONDITIONING SYS...
- Publication number 20140124158
- Publication date May 8, 2014
- Sharp Kabushiki Kaisha
- Takashi Yamashita
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Application
METHOD FOR IMPROVING EFFICIENCY OF A REFRIGERATOR APPLIANCE DURING...
- Publication number 20140123690
- Publication date May 8, 2014
- GENERAL ELECTRIC COMPANY
- Kenneth Joseph Hanley
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
REFRIGERATING APPARATUS
- Publication number 20140060098
- Publication date Mar 6, 2014
- PANASONIC HEALTHCARE CO., LTD.
- Hidetoshi SHINYA
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
ON-LINE ENERGY CONSUMPTION OPTIMIZATION ADAPTIVE TO ENVIRONMENTAL C...
- Publication number 20130340450
- Publication date Dec 26, 2013
- Whirlpool Corporation
- Farhad ASHRAFZADEH
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
SYNCHRONOUS TEMPERATURE RATE CONTROL AND APPARATUS FOR REFRIGERATIO...
- Publication number 20130305756
- Publication date Nov 21, 2013
- Whirlpool Corporation
- ALBERTO REGIO GOMES
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
REFRIGERATOR WITH TEMPERATURE CONTROL
- Publication number 20130219938
- Publication date Aug 29, 2013
- TIM L. COULTER
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
REFRIGERATION ARRANGEMENT AND METHODS FOR REDUCING CHARGE MIGRATION
- Publication number 20130213066
- Publication date Aug 22, 2013
- Whirlpool Corporation
- ANDREW D. LITCH
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
REFRIGERATOR WITH VARIABLE CAPACITY COMPRESSOR AND CYCLE PRIMING AC...
- Publication number 20130213064
- Publication date Aug 22, 2013
- Whirlpool Corporation
- Alberto Regio Gomes
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
DUAL CAPILLARY TUBE / HEAT EXCHANGER IN COMBINATION WITH CYCLE PRIM...
- Publication number 20130213065
- Publication date Aug 22, 2013
- Whirlpool Corporation
- ALBERTO REGIO GOMES
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
ICE COMPARTMENT ASSEMBLY FOR REFRIGERATOR
- Publication number 20130205825
- Publication date Aug 15, 2013
- TIM L. COULTER
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
REFRIGERATOR WITH TEMPERATURE CONTROL
- Publication number 20130205817
- Publication date Aug 15, 2013
- TIM L. COULTER
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
ICE COMPARTMENT ASSEMBLY FOR REFRIGERATOR
- Publication number 20130205819
- Publication date Aug 15, 2013
- TIM L. COULTER
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
REFRIGERATOR WITH TEMPERATURE CONTROL
- Publication number 20130199226
- Publication date Aug 8, 2013
- TIM L. COULTER
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
REFRIGERATOR WITH TEMPERATURE CONTROL
- Publication number 20130199227
- Publication date Aug 8, 2013
- TIM L. COULTER
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Motor speed control of compressors or fans

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Refrigeration appliance fan

Domestic refrigeration appliance with a coolant circuit and method...

Storage unit and tempering system for a storage unit

Ventilation controller for equipment enclosure

Refrigerated food bar arrangement and a cooling system for such a f...

Refrigerator and method for controlling constant temperature thereof

Control method for refrigerator

Refrigerated display case

Refrigerator having a refrigeration system with first and second co...

Methods and apparatus for determining power consumption

Ice compartment assembly for refrigerator

Refrigeration device having automatic defrosting and method for ope...

Robust fixed-sequence control method and appliance for exceptional...

Net heat load compensation control method and appliance for tempera...

Refrigeration system having a variable speed compressor

Ice maker for a refrigeration appliance

Refrigerator and method of controlling the same

Multiple evaporator control using PWM valve/compressor

Cooling equipment, temperature control system, air conditioning sys...

Refrigerator and control method thereof

Container for refrigerating machine

Thawing appliance

Refrigerator and operating method thereof

Refrigeration system having a variable speed compressor

Refrigerator and method for controlling the same

Refrigerator

Refrigeration device for container

Higher efficiency appliance employing thermal load shifting in refr...

Dual capillary tube / heat exchanger in combination with cycle prim...

Ice compartment assembly for refrigerator

Patents Applicationslast 30 patents

Refrigeration System Having A Variable Speed Compressor

Refrigeration System Having A Variable Speed Compressor

ICE MAKER FOR A REFRIGERATION APPLIANCE

COOLING EQUIPMENT, TEMPERATURE CONTROL SYSTEM, AIR CONDITIONING SYS...

REFRIGERATION SYSTEM HAVING A VARIABLE SPEED COMPRESSOR

REFRIGERATOR ICE COMPARTMENT LATCH AND COVER

REFRIGERATOR AND METHOD OF OPERATING REFRIGERATION SYSTEM

METHOD FOR CONTROLLING REFRIGERATOR

CONTROL SYSTEM FOR A DUAL EVAPORATOR REFRIGERATION SYSTEM

NET HEAT LOAD COMPENSATION CONTROL METHOD AND APPLIANCE FOR TEMPERA...

ROBUST FIXED-SEQUENCE CONTROL METHOD AND APPLIANCE FOR EXCEPTIONAL...

DUAL SUCTION COMPRESSOR WITH RAPID SUCTION PORT SWITCHING MECHANISM...

ENTHALPY BASED CONTROL FOR A REFRIGERATION APPLIANCE

HIGHER EFICIENCY APPLIANCE EMPLOYING THERMAL LOAD SHIFTING IN REFRI...

REFRIGERATOR CONTROL SYSTEM AND METHOD

METHOD FOR CONTROLLING THE DEFROST OF AN EVAPORATOR IN A REFRIGERAT...

COOLING EQUIPMENT, TEMPERATURE CONTROL SYSTEM, AIR CONDITIONING SYS...

METHOD FOR IMPROVING EFFICIENCY OF A REFRIGERATOR APPLIANCE DURING...

REFRIGERATING APPARATUS

ON-LINE ENERGY CONSUMPTION OPTIMIZATION ADAPTIVE TO ENVIRONMENTAL C...

SYNCHRONOUS TEMPERATURE RATE CONTROL AND APPARATUS FOR REFRIGERATIO...

REFRIGERATOR WITH TEMPERATURE CONTROL

REFRIGERATION ARRANGEMENT AND METHODS FOR REDUCING CHARGE MIGRATION

REFRIGERATOR WITH VARIABLE CAPACITY COMPRESSOR AND CYCLE PRIMING AC...

DUAL CAPILLARY TUBE / HEAT EXCHANGER IN COMBINATION WITH CYCLE PRIM...

ICE COMPARTMENT ASSEMBLY FOR REFRIGERATOR

REFRIGERATOR WITH TEMPERATURE CONTROL

ICE COMPARTMENT ASSEMBLY FOR REFRIGERATOR

REFRIGERATOR WITH TEMPERATURE CONTROL

REFRIGERATOR WITH TEMPERATURE CONTROL