CA2365747A1 - Deterministic refrigerator defrost method and apparatus - Google Patents

Deterministic refrigerator defrost method and apparatus Download PDF

Info

Publication number
CA2365747A1
CA2365747A1 CA002365747A CA2365747A CA2365747A1 CA 2365747 A1 CA2365747 A1 CA 2365747A1 CA 002365747 A CA002365747 A CA 002365747A CA 2365747 A CA2365747 A CA 2365747A CA 2365747 A1 CA2365747 A1 CA 2365747A1
Authority
CA
Canada
Prior art keywords
defrost
accordance
temperature
cycle
compressor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002365747A
Other languages
French (fr)
Other versions
CA2365747C (en
Inventor
John S. Holmes
Wolfgang Daum
Jerry J. Ii Queen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Publication of CA2365747A1 publication Critical patent/CA2365747A1/en
Application granted granted Critical
Publication of CA2365747C publication Critical patent/CA2365747C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/002—Defroster control
    • F25D21/006—Defroster control with electronic control circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06—Removing frost
    • F25D21/08—Removing frost by electric heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/23—Time delays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/15—Power, e.g. by voltage or current
    • F25B2700/151—Power, e.g. by voltage or current of the compressor motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2117—Temperatures of an evaporator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/002—Defroster control
    • F25D21/008—Defroster control by timer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/06—Refrigerators with a vertical mullion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/02—Sensors detecting door opening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/10—Sensors measuring the temperature of the evaporator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature
    • F25D2700/122—Sensors measuring the inside temperature of freezer compartments

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Defrosting Systems (AREA)

Abstract

A defrost control system for a self-defrosting refrigerator is configured to monitor a compressor load, determine whether at least a first defrost cycle is required based on the compressor load, execute at least one defrost cycle when required; and regulate the defrost cycle to conserve energy. A controller is operatively coupled to a compressor, a defrost heater, and a refrigeration compartment temperature sensor. The controller makes defrost decisions based on temperature conditions in the refrigeration compartment in light of other events, such as refrigerator door openings, completed defrost cycles, and power up events.
Defrost cycles are automatically adjusted as operating conditions change, thereby avoiding unnecessary energy consumption that would otherwise occur in a fixed defrost cycle.

Claims (34)

1. A method for controlling a self-defrosting refrigerator including a compressor, a defrost heater and a controller operatively coupled to the compressor and the defrost heater, said method comprising the steps of:
monitoring a compressor load;
determining whether at least a first defrost cycle is required based on the compressor load;
executing at least one defrost cycle when required; and regulating the defrost cycle to conserve energy.
2. A method in accordance with Claim 1, the refrigerator including an evaporator, said method further comprising the step of monitoring an evaporator load.
3. A method in accordance with Claim 2, said step of determining whether at least a first defrost cycle is required comprises the step of comparing the evaporator load and the compressor load.
4. A method in accordance with Claim 3 wherein said step of monitoring a compressor load comprises the step of sensing a compressor current.
5. A method in accordance with Claim 4 wherein said step of monitoring the evaporator load comprises the step of monitoring a temperature differential across the evaporator.
6. A method in accordance with Claim 1 wherein said step of monitoring a compressor load comprises the step of monitoring a compressor run time.
7. A method in accordance with Claim 6 wherein said step of determining whether at least one defrost is required comprises the step of comparing the compressor run time to a predetermined compressor run time.
8. A method in accordance with Claim 7, said step of monitoring a compressor run time further comprises the step of decrementing the predetermined run time by a predetermined amount for each second or compressor run time.
9. A method in accordance with Claim 8, said step of monitoring a compressor run time further comprising the step of decrementing the predetermined run time by a predetermined amount for each second that the door is open.
10. A method in accordance with Claim 1 wherein said step of determining whether at least a first defrost cycle is required comprises the step of determining whether a normal defrost cycle is required or an abnormal defrost is required.
11. A method in accordance with Claim 10, the controller including a memory, said step of determining whether a normal defrost cycle is required or an abnormal defrost is required comprising the steps of:
monitoring an elapsed defrost time to complete a defrost cycle;
storing the elapsed time in controller memory; and comparing the elapsed time to a predetermined reference time.
12. A method in accordance with Claim 11 wherein said step of executing at least one defrost cycle comprises the steps of:
executing a first defrost cycle when the elapsed time is less than the reference time; and executing a second defrost cycle when the elapsed time is greater than the reference time, said second defrost cycle different than said first defrost cycle.
13. A method in accordance with Claim 1, the refrigerator including at least one refrigeration compartment, said step of regulating the defrost cycle comprising the steps of:
determining a temperature of the refrigeration compartment, and executing a pre-chill cycle only when the determined temperature is above a predetermined temperature.
14. A method in accordance with Claim 1 wherein said step of regulating the defrost cycle comprises the steps of:
monitoring an evaporator temperature during defrost; and terminating the defrost when the evaporator reaches a predetermined temperature.
15. A method in accordance with Claim 1, the refrigerator including a refrigeration compartment, the controller including a memory, the memory containing a time till defrost value and a refrigeration compartment temperature setpoint, said step of regulating the defrost comprising the steps of;
reading the time till defrost and the refrigeration compartment temperature setting upon powerup;
determining the temperature of the refrigeration compartment; and resuming the time till defrost if the determined temperature is substantially at the refrigeration compartment temperature setting.
16. A method in accordance with Claim 1, the refrigerator including a refrigeration compartment, the controller including a memory, the memory containing a refrigeration compartment temperature setpoint, said step of regulating the defrost cycle comprising the steps of:
determining the temperature of the refrigeration after the defrost is completed;
comparing the determined temperature to the compartment temperature setpoint; and executing a cooling cycle only when the determined temperature exceeds the compartment temperature setpoint.
17. A method in accordance with Claim 1 wherein said step of determining whether at least a first defrost cycle is required comprises the step of determining a need for a defrost cycle using fuzzy inputs.
18. A defrost control system for a frost-free refrigerator including a compressor, a defrost heater, at least one refrigeration compartment and a temperature sensor thermally coupled to the refrigeration compartment, said control system comprising:

a controller operatively coupled to the compressor, the defrost heater, and the temperature sensor, said controller configured to:
monitor a compressor load;
determine whether at least a first defrost cycle is required based on the compressor load;
execute at least one defrost cycle when required; and regulate the defrost cycle to conserve energy.
19. A defrost control system accordance with Claim 18, the refrigerator including an evaporator, said controller further configured to monitor an evaporator load.
20. A defrost control system in accordance with Claim 19, said controller further configured to compare the evaporator load and the compressor load.
21. A defrost control system in accordance with Claim 20 said controller further configured to monitor a compressor load by sensing a compressor current.
22. A defrost control system in accordance with Claim 21, said controller further configured to monitor a temperature differential across the evaporator.
23. A defrost control system in accordance with Claim 18, said controller further configured to monitor a compressor run time.
24. A defrost control system in accordance with Claim 23, said controller further configured to compare the compressor run time to a predetermined compressor run time.
25. A defrost control system in accordance with Claim 24, said controller further configured to decrement the predetermined run time by. a predetermined amount for each second or compressor run time.
26. A defrost control system in accordance with Claim 25, said controller further configured to decrement the predetermined run time by a predetermined amount for each second that the door is open.
27. A defrost control system in accordance with Claim 18, said controller further configured to determine whether a normal defrost cycle is required or an abnormal defrost is required.
28. A defrost control system in accordance with Claim 27, said controller comprising a memory, said s said controller further configured to:
monitor an elapsed defrost time to complete a defrost cycle;
store the elapsed time in said controller memory; and compare the elapsed time to a predetermined reference time.
29. A defrost control system in accordance with Claim 28, said controller further configured to:
execute a first defrost cycle when the elapsed time, is less than the reference time; and execute at least a second defrost cycle when the elapsed time is greater than the reference time, said second defrost cycle different than said first defrost cycle.
30. A defrost control system in accordance with Claim 18, said controller further configured to determine a temperature of the refrigeration compartment, and execute a pre-chill cycle only when the determined temperature is above a predetermined temperature.
31. A defrost control system in accordance with Claim 18, said controller further configured to:
monitor an evaporator temperature during defrost; and terminate the defrost when the evaporator reaches a predetermined temperature.
32. A defrost control system in accordance with Claim 18, said controller comprising a memory, said memory containing a time till defrost value and a refrigeration compartment temperature setpoint, said controller further configured to:

read the time till defrost and the refrigeration compartment temperature setting upon powerup;
determine the temperature of the refrigeration compartment; and resume the time till defrost if the determined temperature is substantially at the determined temperature.
33. A defrost control system in accordance with Claim 18; said controller comprising a memory, said memory containing a refrigeration compartment temperature setpoint, said controller further configured to:
determine the temperature of the refrigeration after the defrost is completed;
compare the determined temperature to the compartment temperature setpoint; and execute cooling cycle only when the determined temperature exceeds the compartment temperature setpoint.
34. A defrost control system in accordance with Claim 18 said controller further configured to determine a need for a defrost cycle using fuzzy inputs.
CA2365747A 2001-01-05 2001-12-20 Deterministic refrigerator defrost method and apparatus Expired - Fee Related CA2365747C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/755,296 2001-01-05
US09/755,296 US6606870B2 (en) 2001-01-05 2001-01-05 Deterministic refrigerator defrost method and apparatus

Publications (2)

Publication Number Publication Date
CA2365747A1 true CA2365747A1 (en) 2002-07-05
CA2365747C CA2365747C (en) 2010-11-16

Family

ID=25038559

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2365747A Expired - Fee Related CA2365747C (en) 2001-01-05 2001-12-20 Deterministic refrigerator defrost method and apparatus

Country Status (3)

Country Link
US (1) US6606870B2 (en)
CA (1) CA2365747C (en)
MX (1) MXPA02000088A (en)

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6523358B2 (en) * 2001-03-30 2003-02-25 White Consolidated Industries, Inc. Adaptive defrost control device and method
US6880949B2 (en) * 2001-11-15 2005-04-19 General Electric Company Mullion assembly for refrigerator quick chill and thaw pan
US20060038314A1 (en) * 2001-11-27 2006-02-23 Capaldo Kevin P Method for producing low birefringence plastic film
TW200300914A (en) * 2001-12-14 2003-06-16 Matsushita Electric Ind Co Ltd Sensor information linking device
US6779352B2 (en) * 2002-01-14 2004-08-24 Samsung Electronics Co., Ltd. Refrigerator and method of controlling the same
US7397827B2 (en) * 2002-12-11 2008-07-08 Tellabs Operations, Inc. Systems and methods for switching multi-rate communications
US6739146B1 (en) * 2003-03-12 2004-05-25 Maytag Corporation Adaptive defrost control for a refrigerator
SE0303227D0 (en) * 2003-12-01 2003-12-01 Dometic Sweden Ab defrosting
US7921660B2 (en) * 2005-05-26 2011-04-12 Brody Engineering Ltd. System and method for controlling defrost cycles of a refrigeration device
US20070130974A1 (en) * 2005-12-12 2007-06-14 Gatlin Gary L Air conditioner defrost system
KR100760199B1 (en) * 2005-12-13 2007-09-20 삼성전자주식회사 Method of controlling refrigerator
US7827811B2 (en) * 2006-01-09 2010-11-09 Maytag Corporation Refrigerator control including a hidden features menu
US7765819B2 (en) * 2006-01-09 2010-08-03 Maytag Corporation Control for a refrigerator
US7895845B2 (en) * 2006-12-28 2011-03-01 Steve Every Adaptive defrost control for frozen product dispensers
JP2009210161A (en) * 2008-02-29 2009-09-17 Sanyo Electric Co Ltd Equipment control system, control device, and control program
JP4642100B2 (en) * 2008-09-01 2011-03-02 三菱電機株式会社 Heat pump equipment
US20100326096A1 (en) * 2008-11-10 2010-12-30 Brent Alden Junge Control sytem for bottom freezer refrigerator with ice maker in upper door
US8417386B2 (en) * 2008-11-17 2013-04-09 Trane International Inc. System and method for defrost of an HVAC system
WO2010107536A2 (en) * 2009-03-18 2010-09-23 Carrier Corporation Microprocessor controlled defrost termination
JP5756898B2 (en) * 2009-12-28 2015-07-29 パナソニックヘルスケアホールディングス株式会社 Cold storage
US8826679B2 (en) 2010-12-01 2014-09-09 General Electric Company Refrigerator energy and temperature control
US9127875B2 (en) 2011-02-07 2015-09-08 Electrolux Home Products, Inc. Variable power defrost heater
WO2013010540A2 (en) 2011-07-15 2013-01-24 Danfoss A/S Method for controlling a refrigerator, a control unit and a refrigerator
EP2732224A2 (en) * 2011-07-15 2014-05-21 Danfoss A/S Method for controlling defrost operation of a refrigeration system
EP2623903B1 (en) * 2011-10-28 2016-06-15 Technomirai Co., Ltd Energy-saving system for showcase, refrigerator and freezer
KR102082515B1 (en) * 2012-03-14 2020-02-27 가부시키가이샤 한도오따이 에네루기 켄큐쇼 Power supply system
FR2991441B1 (en) * 2012-06-04 2014-06-20 Mobile Comfort Holding METHOD FOR DETECTING THE FRICTION OF AN AIR / FRIGORIGENE FLUID EVAPORATOR EXCHANGER BASED ON THE INCREASE IN ELECTRICAL CONSUMPTION
US9328956B2 (en) * 2012-12-18 2016-05-03 General Electric Company Refrigerator control system and method
EP2754981A1 (en) * 2013-01-15 2014-07-16 Whirpool Corporation A method for controlling the defrost of an evaporator in a refrigeration appliance and refrigeration appliance using such method
BR112015024124B1 (en) 2013-03-21 2022-05-17 Evapco, Inc. Method and apparatus for initiating coil thawing in a refrigeration system evaporator
US20150121921A1 (en) * 2013-06-03 2015-05-07 Kenneth Glaser "CPTS" constant product temperature scanner
CA2947437A1 (en) * 2014-05-06 2015-11-12 Evapco, Inc. Sensor for coil defrost in a refrigeration system evaporator
KR101728388B1 (en) * 2014-12-15 2017-04-19 엘지전자 주식회사 Refrigerator with defrosting unit
AU2018412069A1 (en) 2018-03-09 2020-08-06 Electrolux Do Brasil S.A. Adaptive defrost activation method
US11493260B1 (en) 2018-05-31 2022-11-08 Thermo Fisher Scientific (Asheville) Llc Freezers and operating methods using adaptive defrost
US11204192B2 (en) * 2018-06-15 2021-12-21 Johnson Controls Technology Company Adjustable duct for HVAC system
US11131497B2 (en) * 2019-06-18 2021-09-28 Honeywell International Inc. Method and system for controlling the defrost cycle of a vapor compression system for increased energy efficiency
CN113915921B (en) * 2021-01-22 2023-02-17 海信冰箱有限公司 Defrosting control method and refrigerator
CN115265050A (en) * 2021-04-29 2022-11-01 青岛海尔电冰箱有限公司 Refrigerator and control method thereof

Family Cites Families (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA844775A (en) * 1967-11-09 1970-06-16 H. Ting Youn Defrost control apparatus
US3681933A (en) 1970-08-20 1972-08-08 Dynamics Corp America Defrost control
DE2262039B2 (en) 1971-12-23 1980-01-17 N.V. Philips' Gloeilampenfabrieken, Eindhoven (Niederlande) Device for the automatic control of the defrosting of the evaporator of a refrigerator
US3992895A (en) 1975-07-07 1976-11-23 Kramer Daniel E Defrost controls for refrigeration systems
US4104888A (en) 1977-01-31 1978-08-08 Carrier Corporation Defrost control for heat pumps
US4156350A (en) 1977-12-27 1979-05-29 General Electric Company Refrigeration apparatus demand defrost control system and method
US4173871A (en) 1977-12-27 1979-11-13 General Electric Company Refrigeration apparatus demand defrost control system and method
US4251988A (en) 1978-12-08 1981-02-24 Amf Incorporated Defrosting system using actual defrosting time as a controlling parameter
US4694657A (en) 1979-06-20 1987-09-22 Spectrol Electronics Corporation Adaptive defrost control and method
US4680940A (en) 1979-06-20 1987-07-21 Vaughn Eldon D Adaptive defrost control and method
US4327556A (en) 1980-05-08 1982-05-04 General Electric Company Fail-safe electronically controlled defrost system
US4327557A (en) 1980-05-30 1982-05-04 Whirlpool Corporation Adaptive defrost control system
US4297852A (en) 1980-07-17 1981-11-03 General Electric Company Refrigerator defrost control with control of time interval between defrost cycles
US4344294A (en) 1980-07-31 1982-08-17 General Electric Company Thermal delay demand defrost system
JPS608431B2 (en) 1981-03-03 1985-03-02 三菱電機株式会社 frost detector
US4528821A (en) 1982-07-28 1985-07-16 Whirlpool Corporation Adaptive demand defrost control for a refrigerator
US4481785A (en) 1982-07-28 1984-11-13 Whirlpool Corporation Adaptive defrost control system for a refrigerator
US4555057A (en) 1983-03-03 1985-11-26 Jfec Corporation & Associates Heating and cooling system monitoring apparatus
US4834169A (en) 1984-03-12 1989-05-30 Whirlpool Corporation Apparatus for controlling a refrigerator in low ambient temperature conditions
US5187941A (en) 1984-03-12 1993-02-23 Whirlpool Corporation Method for controlling a refrigerator in low ambient temperature conditions
JPS6189460A (en) 1984-10-05 1986-05-07 株式会社東芝 Refrigerator
US4604871A (en) 1985-01-17 1986-08-12 General Electric Company Over-temperature warning system for refrigerator appliance
US4663941A (en) 1985-09-30 1987-05-12 Whirlpool Corporation Refrigerator temperature and defrost control
US4707684A (en) 1985-12-18 1987-11-17 Whirlpool Corporation Alarm for a refrigerator
US4689965A (en) 1985-12-27 1987-09-01 Whirlpool Corporation Adaptive defrost control for a refrigerator
US4750332A (en) 1986-03-05 1988-06-14 Eaton Corporation Refrigeration control system with self-adjusting defrost interval
JPH0689976B2 (en) 1987-03-13 1994-11-14 株式会社東芝 Refrigerator temperature control circuit
JPH01134146A (en) 1987-11-18 1989-05-26 Mitsubishi Electric Corp Defrosting device for air conditioner
US4949550A (en) 1989-10-04 1990-08-21 Thermo King Corporation Method and apparatus for monitoring a transport refrigeration system and its conditioned load
US4938027A (en) 1989-11-06 1990-07-03 Amana Refrigeration, Inc. Apparatus and method for defrosting refrigerator in vacation mode
KR0129519B1 (en) 1991-01-26 1998-04-08 강진구 Defrosting control method of a refrigerator
KR960001986B1 (en) 1991-01-31 1996-02-08 삼성전자주식회사 Refrigerator
US5123253A (en) 1991-07-11 1992-06-23 Thermo King Corporation Method of operating a transport refrigeration unit
US5493867A (en) 1992-11-18 1996-02-27 Whirlpool Corporation Fuzzy logic adaptive defrost control
US5363669A (en) 1992-11-18 1994-11-15 Whirlpool Corporation Defrost cycle controller
US5440893A (en) 1994-02-28 1995-08-15 Maytag Corporation Adaptive defrost control system
JPH07260326A (en) 1994-03-24 1995-10-13 Toshiba Corp Defrost controller for refrigerator
US5483804A (en) 1994-03-28 1996-01-16 Sanyo Electric Co., Ltd. Defrost control apparatus for refrigerator
KR0182534B1 (en) 1994-11-17 1999-05-01 윤종용 Defrosting device and its control method of a refrigerator
KR100188926B1 (en) 1994-11-30 1999-06-01 김광호 Defrosting method and its apparatus of ga fuzzy theory refrigerator
KR0183703B1 (en) 1994-11-30 1999-05-01 김광호 Method and apparatus for defrosting ga-fuzzy theory using refrigeration-refrigerators
US5533350A (en) 1994-12-16 1996-07-09 Robertshaw Controls Company Defrost control of a refrigeration system utilizing ambient air temperature determination
US5842355A (en) 1995-03-22 1998-12-01 Rowe International, Inc. Defrost control system for a refrigerator
US5692385A (en) 1996-01-26 1997-12-02 General Electric Company System and method initiating defrost in response to speed or torque of evaporator motor
US5765382A (en) 1996-08-29 1998-06-16 Texas Instruments Incorporated Adaptive defrost system
KR0170597B1 (en) 1996-08-31 1999-03-20 배순훈 Control method of refrigerator defrosting pause
US5887443A (en) 1997-11-20 1999-03-30 Samsung Electronics Co., Ltd. Defrost control method and apparatus of refrigerator

Also Published As

Publication number Publication date
CA2365747C (en) 2010-11-16
MXPA02000088A (en) 2002-09-11
US6606870B2 (en) 2003-08-19
US20020088238A1 (en) 2002-07-11

Similar Documents

Publication Publication Date Title
CA2365747A1 (en) Deterministic refrigerator defrost method and apparatus
US5924295A (en) Method and apparatus for controlling initial operation of refrigerator
JP3231076B2 (en) Automatic operation control method of refrigerator
EP0859206B1 (en) Refrigeration system and method of control
US6216478B1 (en) Operation speed change system and method for refrigerator
US4510767A (en) Cold storage and refrigeration system
US5787718A (en) Method for controlling quick cooling function of refrigerator
KR0142739B1 (en) Defrosting device for a refrigerator
JPH0827122B2 (en) Refrigerator temperature control method
CN112460902A (en) Refrigerator defrosting method and refrigerator
EP2905566B1 (en) Refrigerator and method for controlling the same
JPH06213548A (en) Refrigerator
JP3716593B2 (en) refrigerator
KR100593632B1 (en) Method of controlling defrost cycle of refrigerator and its device
JP3034781B2 (en) refrigerator
JP3066147B2 (en) Showcase defrost control method
CN109751830A (en) The detection method and device of refrigeration equipment and its state
CN104969137B (en) Control system for refrigerated equipment and apparatus with energy saving features
JP3886190B2 (en) vending machine
US20240133621A1 (en) Refrigerator and control method thereof
KR20130037531A (en) Method for power saving motion of refrigerator
JPS6135856A (en) Method for controlling temperature of thermostatic apparatus
KR100452994B1 (en) Control method for refrigeration system
KR960010658B1 (en) Refrigerator
JPH07180940A (en) Refrigerator

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20121220