EP0603576A2 - Dispositif pour réduire la consommation d'énergie pendant la dégivrage d'un réfrigérateur - Google Patents

Dispositif pour réduire la consommation d'énergie pendant la dégivrage d'un réfrigérateur Download PDF

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Publication number
EP0603576A2
EP0603576A2 EP93118974A EP93118974A EP0603576A2 EP 0603576 A2 EP0603576 A2 EP 0603576A2 EP 93118974 A EP93118974 A EP 93118974A EP 93118974 A EP93118974 A EP 93118974A EP 0603576 A2 EP0603576 A2 EP 0603576A2
Authority
EP
European Patent Office
Prior art keywords
resistance heater
refrigerator
electrical
defrosting
compartment
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Withdrawn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
EP93118974A
Other languages
German (de)
English (en)
Other versions
EP0603576A3 (fr
Inventor
Sergio C/O Whirlpool Italia S.R.L. Gasperini
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.)
Whirlpool Europe BV
Original Assignee
Whirlpool Europe BV
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 Whirlpool Europe BV filed Critical Whirlpool Europe BV
Publication of EP0603576A2 publication Critical patent/EP0603576A2/fr
Publication of EP0603576A3 publication Critical patent/EP0603576A3/fr
Withdrawn legal-status Critical Current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
    • F25D21/06—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
    • 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
    • F25D2400/04—Refrigerators with a horizontal mullion

Definitions

  • This invention relates to a device in accordance with the introduction to the independent claim.
  • This periodic defrosting is particularly required in the refrigeration compartment. This is achieved for example by timed activation of a defrosting resistance heater positioned at the evaporator.
  • An object of the invention is to provide a device which enables the defrosting resistance heater to be switched out of its usual power circuit when the temperature within the environment in which the refrigerator is located exceeds the predetermined temperature, ie exceeds a predetermined value which enables the refrigeration compartment to be defrosted without the operation of said resistance heater. This results in a corresponding energy saving during refrigerator operation.
  • a further object is to provide a device of the aforesaid type which is of reliable use and of simple low-cost construction.
  • Figure 1 is a schematic view of a refrigerator provided with the device of the invention
  • Figure 2 is a partial schematic view of the electrical circuit of a refrigerator such as that shown in Figure 1.
  • a refrigerator 1 for example an upright refrigerator
  • a cabinet 2 housing a freezer compartment 3 and a refrigeration compartment 4.
  • Hairpin evaporator coils indicated respectively by 6 and 7 are contained in these compartments (which are provided with usual walls and closure doors, not shown). These coils form part of a single evaporator of the refrigeration circuit, which is of known type and therefore not further described.
  • a usual defrosting electrical resistance heater 8 which is activated in known manner (for example during predetermined cycles) in such a manner as to (partially or totally) defrost the coil 7 and the walls of the compartment 4.
  • the electrical resistance heater 8 is connected to a device 10 which measures the temperature of the environment containing the refrigerator 1, to allow the resistance heater 8 to be powered only when this temperature exceeds 20-22°C.
  • the device 10 comprises a temperature sensor member 15 associated with the cabinet 2 and located in such a position as to measure the ambient temperature without being influenced by the internal temperature of the compartment 4.
  • This sensor is positioned for example on the outside of said cabinet.
  • the sensor is connected to a switch member 16 connected in series with the resistance heater 8.
  • the senor is a bimetallic element 17 in the form of a strip connected in series with the resistance heater 8 and located in such a position as to sense ambient temperature.
  • the element 17 also acts as a switch because when ambient temperature exceeds 20°C it changes its spatial position to open the electrical power circuit to the resistance heater 8.
  • FIG. 2 One embodiment of this circuit is shown in Figure 2. It comprises an electrical feed line 20 of known type and a return line 21, to which there is connected an electrical branch 22 comprising a switch 23 controlled by the usual thermostat positioned in the refrigeration compartment 4. To this branch there is connected a usual motor-compressor unit 25 provided with the necessary starter device 25A and protection device 25B, and forming part of the said refrigeration circuit.
  • the bimetallic element 17 is connected in series with the resistance heater 29 to act on fixed contacts 37 and 38 of the branch 28.
  • the switching thermostat 23 When the required temperature is reached the switching thermostat 23 opens and interrupts the power passing through it to the motor-compressor unit 25.
  • the resistance heater 29 is powered at one end (line 20) via the bimetallic element 17 and at its other end (line 21) via the motor-compressor unit 25 (the resistance of the resistance heater 29 is much higher than the internal resistance of the electric motor, so that during said rest stage the motor windings merely act as the conducting wire to feed the electrical signal from the line 21 to the resistance heater 29).
  • the resistance heater 29 heats the compartment 4 and the coil 7, to defrost them.
  • the bimetallic element 17 changes its spatial arrangement and separates from the contacts 37, 38. In this manner power is cut off to the resistance heater 29 with the result that defrosting takes place naturally without the operation of said resistance heater.
  • the element 17 maintains its position of separation from the contacts 37, 38 until ambient temperature falls a few degrees below the said 20°C (for example to below 16°C).
  • the element 17 then again closes said contacts to again power the resistance heater 29.
  • the resistance heater 29 is not powered, with consequent energy saving.
  • the switching thermostat 23 closes to restore normal operating conditions.
  • the described device can obviously be constructed in a more complicated manner, for example by connecting the sensor 15 to an electrical or electronic circuit (for example of microprocessor type) which acts on the switch 16 so that it closes and opens on the basis of the temperature of the environment containing the refrigerator 1.
  • an electrical or electronic circuit for example of microprocessor type

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)
EP93118974A 1992-12-22 1993-11-25 Dispositif pour réduire la consommation d'énergie pendant la dégivrage d'un réfrigérateur. Withdrawn EP0603576A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT001087 IT227082Y1 (it) 1992-12-22 1992-12-22 Dispositivo per ridurre i consumi energetici durante la fase di sbrinamento di un refrigeratore
ITMI921087U 1992-12-22

Publications (2)

Publication Number Publication Date
EP0603576A2 true EP0603576A2 (fr) 1994-06-29
EP0603576A3 EP0603576A3 (fr) 1995-01-18

Family

ID=11363220

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93118974A Withdrawn EP0603576A3 (fr) 1992-12-22 1993-11-25 Dispositif pour réduire la consommation d'énergie pendant la dégivrage d'un réfrigérateur.

Country Status (2)

Country Link
EP (1) EP0603576A3 (fr)
IT (1) IT227082Y1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1726895A1 (fr) * 2005-05-27 2006-11-29 Giuseppe Floris Dispositif de protection anti-givre pour un système de réfrigération

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE943169C (de) * 1951-07-13 1956-05-17 Gen Motors Corp Haushaltskuehlschrank
DE1963336A1 (de) * 1968-12-26 1970-08-27 Ulgor Sci System zur automatischen Enteisung von Kuehlschraenken
DE2557794A1 (de) * 1975-12-22 1977-06-23 Licentia Gmbh Verfahren und vorrichtung zum abtauen des verdampfers bei einem kuehlgeraet mit abtauvorrichtung
FR2347634A1 (fr) * 1976-04-08 1977-11-04 Bosch Siemens Hausgeraete Refrigerateur, en particulier refrigerateur a deux compartiments

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE943169C (de) * 1951-07-13 1956-05-17 Gen Motors Corp Haushaltskuehlschrank
DE1963336A1 (de) * 1968-12-26 1970-08-27 Ulgor Sci System zur automatischen Enteisung von Kuehlschraenken
DE2557794A1 (de) * 1975-12-22 1977-06-23 Licentia Gmbh Verfahren und vorrichtung zum abtauen des verdampfers bei einem kuehlgeraet mit abtauvorrichtung
FR2347634A1 (fr) * 1976-04-08 1977-11-04 Bosch Siemens Hausgeraete Refrigerateur, en particulier refrigerateur a deux compartiments

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1726895A1 (fr) * 2005-05-27 2006-11-29 Giuseppe Floris Dispositif de protection anti-givre pour un système de réfrigération

Also Published As

Publication number Publication date
ITMI921087V0 (it) 1992-12-22
EP0603576A3 (fr) 1995-01-18
IT227082Y1 (it) 1997-09-09
ITMI921087U1 (it) 1994-06-22

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