EP0721092A2 - Abtausteuerung eines gekühlten Fachs - Google Patents

Abtausteuerung eines gekühlten Fachs Download PDF

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Publication number
EP0721092A2
EP0721092A2 EP95120450A EP95120450A EP0721092A2 EP 0721092 A2 EP0721092 A2 EP 0721092A2 EP 95120450 A EP95120450 A EP 95120450A EP 95120450 A EP95120450 A EP 95120450A EP 0721092 A2 EP0721092 A2 EP 0721092A2
Authority
EP
European Patent Office
Prior art keywords
compressor
compartment
switch
cam
actuator
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.)
Withdrawn
Application number
EP95120450A
Other languages
English (en)
French (fr)
Other versions
EP0721092A3 (de
Inventor
John P. Duve
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.)
Eaton Corp
Original Assignee
Eaton Corp
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 Eaton Corp filed Critical Eaton Corp
Publication of EP0721092A2 publication Critical patent/EP0721092A2/de
Publication of EP0721092A3 publication Critical patent/EP0721092A3/de
Withdrawn legal-status Critical Current

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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
    • F25D21/004—Control mechanisms
    • 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

Definitions

  • the present invention relates to controlling operation of an electrically operated defroster for refrigerated compartments such, as for example, the freezer compartment in a refrigerator and particularly refrigerators of the type produced in high volume for household usage.
  • Refrigerators manufactured for household usage are sold in a highly competitive market place and it is necessary to reduce the manufacturing cost to a minimum in order to compete in this market.
  • the present invention provides a cam operated selector switch for selecting between operation of the refrigerator compressor and a defrost heater.
  • the cam is operated by an advanced mechanism incrementally advanced during each on/off cycle of the compressor; and, the cam is operative upon a predetermined number of accumulated advances to move the selector switch from a position energizing the compressor to a position completing a circuit for the defrost heater.
  • the selector switch is returned to a position de-energizing the defrost heater and a position selecting compressor operation.
  • the advance mechanism preferably comprises an advance pawl and ratchet where the advance pawl is pivoted by a connecting means in the form of a linkage actuated by a temperature sensing element in the refrigerated compartment.
  • the temperature sensing element also actuates and de-actuates a line power switch to the cam operated selector switch.
  • the refrigerated compartment temperature sensor advances and retracts the advanced pawl each occurrence of the opening and closing of the line switch by the refrigerated compartment temperature sensor.
  • a separate temperature sensor de-actuates the defrost heater upon warming of the compartment by the defrost heater in the event of a failure of the compressor controlling temperature sensor.
  • the drawing comprises a schematic of a control system for a refrigerator compressor and defrost heater embodying the principals of the present invention.
  • control system of the present invention is indicated generally at 10 and includes a refrigerated compartment indicated by dashed outline and reference numeral 12 which has disposed therein a temperature transducer means such as a thermostatic control or thermostat indicated generally at 14.
  • Control 14 operates an advance mechanism which effects operation of a selector switch indicated at generally at 16 which is operated by a cam 18.
  • the cam is advanced by an advance mechanism indicated generally at 20 which is operatively connected to the thermostat 14 as indicated by the dashed line in the drawing.
  • Selector switch 16 selects between a position operating a refrigerant compressor 22 generally located remotely from the compartment 12 and a defrost heater 25 generally associated with the compartment 12.
  • the thermostat 14 includes a line switch indicated generally at 24 which has a movable contact arm 26 connected to one side L1 of a power line and a stationary contact 28 which is connected to the common terminal of switch 16 which comprises preferably a single-pole double-switch 16.
  • Switch 16 has one side contact 30 thereof connected to junction 32 which is connected to one side of the compressor 22 and one side of a freezer fan motor 34.
  • the opposite side of the compressor 22 is connected to power line junction 36 on side L2 of the power line; and, the opposite side of fan 34 is connected to power line junction 38 on power line L2.
  • Switch 16 has another opposite side contact 40 which is connected to one side of defrost heater 25 which has its opposite side connected to one terminal of a thermostatic switch indicated generally at 42 which has the other side thereof connected to power line junction 44 on line L2.
  • Switch 42 is operated by a defrost temperature sensor 46 associated with the refrigerated compartment 12.
  • Switch 16 is biased to the position closing against contact 30 for compressor energization by a suitable bias means such as spring 48 and has a cam follower 50 provided on the movable arm of the switch.
  • the advance mechanism 20 preferably comprises a pivoted advance pawl 52 which engages upon upward movement, teeth 54 of ratchet wheel 56 which is connected as indicated by dashed line in the drawing for, upon rotational movement, rotating cam 18.
  • Pawl 52 is connected to a link member 58 which is pivoted for movement by the thermostat temperature sensing element 60.
  • Link member 58 is also connected with a lost-motion slotted connection and pin 62 to the arm 26 of switch 24 as indicated in dashed line in the drawing.
  • a door switch 64 may be connected in series with an interior light 66.
  • cam 18 acts against cam follower 50 to move switch 16 from the position shown in dashed outline of the drawing to the position shown in solid outline for contacting side contact 40 which effects and energization of the defrost heater and de-energization of the compressor.
  • temperature sensor 60 Upon the defrost heater raising the compartment 12 to a predetermined temperature, temperature sensor 60 is operative to close line switch 24 and move linkage member 58 for retracting pawl 52 an amount sufficient to incrementally advance ratchet wheel 56 and cam 18 to return the switch 16 to the position shown in dashed outline closing against contact 30 and to re-energize the compressor.
  • the present invention thus provides a unique and novel electromechanical system for energizing a refrigerator defrost heater after an accumulated number of refrigerant compressors cycles without the need for a motor driven timing mechanism.

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)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP95120450A 1995-01-06 1995-12-22 Abtausteuerung eines gekühlten Fachs Withdrawn EP0721092A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US36960295A 1995-01-06 1995-01-06
US369602 1995-01-06

Publications (2)

Publication Number Publication Date
EP0721092A2 true EP0721092A2 (de) 1996-07-10
EP0721092A3 EP0721092A3 (de) 1998-01-14

Family

ID=23456125

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95120450A Withdrawn EP0721092A3 (de) 1995-01-06 1995-12-22 Abtausteuerung eines gekühlten Fachs

Country Status (5)

Country Link
EP (1) EP0721092A3 (de)
JP (1) JPH08254375A (de)
CN (1) CN1151507A (de)
BR (1) BR9600423A (de)
CA (1) CA2166571A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0897142A1 (de) * 1997-08-12 1999-02-17 Merloni Elettrodomestici S.p.A. Temperaturregelungssystem für Kühlschrank
WO2020093039A3 (en) * 2018-11-04 2020-06-11 Elemental Machines, Inc. Method and apparatus for determining the defrost timing of a freezer
CN115717806A (zh) * 2022-11-23 2023-02-28 江苏省精创电气股份有限公司 用于冷库的智能化霜方法、装置、存储介质和电子终端

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6466682B2 (ja) * 2014-10-15 2019-02-06 シャープ株式会社 空気調和機
KR102354521B1 (ko) 2015-03-05 2022-01-24 엘지이노텍 주식회사 감지 모듈 및 이를 포함하는 냉장고
CN115200290B (zh) * 2022-07-04 2023-10-27 珠海格力电器股份有限公司 一种冰箱的控制方法及冰箱

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2166602A (en) * 1938-03-17 1939-07-18 Honeywell Regulator Co Refrigeration control system
US2711079A (en) * 1952-11-18 1955-06-21 Gen Electric Automatic refrigerator control
US2949016A (en) * 1955-01-05 1960-08-16 Robert H Thorner Defrosting control means for refrigeration apparatus
US3022640A (en) * 1959-08-11 1962-02-27 Whirlpool Co Home appliance
GB1429569A (en) * 1973-09-11 1976-03-24 Amf Inc Refrigerator control apparatus
US4173871A (en) * 1977-12-27 1979-11-13 General Electric Company Refrigeration apparatus demand defrost control system and method
US4358933A (en) * 1981-01-19 1982-11-16 General Electric Company Household refrigerator defrost system
GB2115612B (en) * 1982-02-05 1985-11-13 Ranco Inc Control unit for refrigerators or freezers

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0897142A1 (de) * 1997-08-12 1999-02-17 Merloni Elettrodomestici S.p.A. Temperaturregelungssystem für Kühlschrank
WO2020093039A3 (en) * 2018-11-04 2020-06-11 Elemental Machines, Inc. Method and apparatus for determining the defrost timing of a freezer
US11561037B2 (en) 2018-11-04 2023-01-24 Elemental Machines, Inc. Method and apparatus for determining freezer status
US12449183B2 (en) 2018-11-04 2025-10-21 Elemental Machines, Inc. Method and apparatus for determining freezer status
CN115717806A (zh) * 2022-11-23 2023-02-28 江苏省精创电气股份有限公司 用于冷库的智能化霜方法、装置、存储介质和电子终端

Also Published As

Publication number Publication date
BR9600423A (pt) 1998-03-03
JPH08254375A (ja) 1996-10-01
CA2166571A1 (en) 1996-07-07
EP0721092A3 (de) 1998-01-14
CN1151507A (zh) 1997-06-11

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