EP0995957A2 - Kältegerät mit Temperaturausgleichseinrichtung - Google Patents

Kältegerät mit Temperaturausgleichseinrichtung Download PDF

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Publication number
EP0995957A2
EP0995957A2 EP99117317A EP99117317A EP0995957A2 EP 0995957 A2 EP0995957 A2 EP 0995957A2 EP 99117317 A EP99117317 A EP 99117317A EP 99117317 A EP99117317 A EP 99117317A EP 0995957 A2 EP0995957 A2 EP 0995957A2
Authority
EP
European Patent Office
Prior art keywords
temperature
refrigeration apparatus
control means
lamp
cold storage
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
EP99117317A
Other languages
English (en)
French (fr)
Other versions
EP0995957A3 (de
EP0995957B1 (de
Inventor
Massimiliano Ranieri
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.)
Electrolux Home Products Italy SpA
Original Assignee
Electrolux Zanussi Elettrodomestici SpA
Electrolux Zanussi SpA
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 Electrolux Zanussi Elettrodomestici SpA, Electrolux Zanussi SpA filed Critical Electrolux Zanussi Elettrodomestici SpA
Publication of EP0995957A2 publication Critical patent/EP0995957A2/de
Publication of EP0995957A3 publication Critical patent/EP0995957A3/de
Application granted granted Critical
Publication of EP0995957B1 publication Critical patent/EP0995957B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D27/00—Lighting arrangements
    • F25D27/005—Lighting arrangements combined with control means
    • 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
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • 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
    • 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
    • F25D2400/34—Temperature balancing 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
    • 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
    • F25D2700/12—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
    • F25D2700/14—Sensors measuring the temperature outside the refrigerator or freezer

Definitions

  • the present invention refers to a refrigeration apparatus of the type comprising at least a first compartment and at least a second compartment that are cooled down at different temperatures, as well as a temperature balancing device adapted to ensure a correct operation of the apparatus even in the case of the ambient temperature dropping to an excessive extent.
  • Refrigeration apparatuses of this kind are well-known in the art and they generally comprise a refrigerating circuit provided with a single compressor and two evaporators arranged in series and associated to a cold storage compartment and a freezer compartment, respectively.
  • Automatic control means enable the cold storage compartment temperature to be set and the compressor to be caused to operate cyclically in order to keep respective pre-determined temperatures in the two compartments.
  • the temperature balancing device is adapted to artificially heat up the cold storage compartment when the ambient temperature is excessively low, in such a manner as to increase the rate of the operation cycles of the compressor, thereby preventing the temperature in the freezer compartment from increasing to a dangerous extent as far as the integrity of the therein stored food articles is concerned.
  • the temperature balancing device preferably makes use, as a heating element, of the same illuminating lamp which is provided in the cold storage compartment and is normally controlled to light up whenever the access door of said compartment is opened.
  • a capacitor may be used in view of reducing the power output of the lamp when the latter is operated as a temperature-balancing heating element.
  • the lamp can be operated at normal power rating by means of a switch adapted to make the connection when the door is opened, or can be operated at a reduced power rating, through said capacitor and an additionally provided switch, in response to an excessive drop in the ambient temperature.
  • said additional switch may either be of the manually actuated type or may be provided in the form of an electronic switch that is controllable through a driving circuit adapted to either directly or indirectly detect the ambient temperature.
  • the main drawback connected to the above described solution anyway derives from the fact that, when operating as a temperature balacing element, the lamp is operated at a pre-determined fixed power rating, regardless of the actual operating conditions of the refrigeration apparatus and the actual value of the ambient temperature. Therefore, the resulting "thermally balanced" operation of the apparatus is a rather approximate, imprecise one, ie. the thermal power output of the lamp may be either undesirably excessive or actually insufficient for the operating conditions of the refrigeration apparatus to be able to be controlled automatically in an effective, accurate manner.
  • a further purpose of the present invention is to provide a refrigeration apparatus of the above cited kind, which, although functionally sophisticated, requires a substantially limited number of component parts.
  • the refrigeration apparatus is preferably a refrigerator of the type comprising at least a cold storage compartment 3 and at least a freezer compartment 4.
  • the two compartments 3 and 4 are thermally insulated and are adapted to be cooled down by respective evaporators connected in series in a refrigerating circuit that also includes a compressor 8 and a condenser which are both common to both compartments.
  • a compressor 8 and a condenser which are both common to both compartments.
  • the compartments 3 and 4 are normally kept at respective temperatures, wherein the cold storage temperature is obviously higher than the freezer temperature.
  • the rated temperature of the cold storage compartment 3, and as a consequence also the temperature of the freezer compartment 4, is adjustable by means a a control device 5 to which at least a lamp 6 (preferably of the filament type).
  • the lamp 6 is adapted to perform the twofold task of illuminating the cold storage compartment 3 (by for instance delivering its full thermal power output) when the associated access door of the refrigerator is opened, and artificially heating the same cold storage compartment 3 (even if the associated access door is closed) when anomalous conditions occur as brought about by an excessive lowering of the ambient temperature Ta.
  • the lamp 6 is able to perform a temperature balancing task, ie. is capable of heating up the cold storage compartment 3 to a temperature that is detected by an appropriate sensor 7 and used to cause the on/off cycles of the compressor 8 to occur at a faster rate.
  • the lamp 6 is anyway supplied at the normal power rating, ie, at the rating at which it operates when performing as an illuminating lamp upon a door opening condition being detected (for instance, by a Reed-type magnetic sensor 12 or the like).
  • the refrigeration apparatus comprises control means based on a microprocessor 9, for instance of the Motorola P18 type, that are adapted to control at least an electronic switch 10 (for instance, a Triac) so as to deliver to the lamp 6 (as this will be described in greater detail further on) the power supply available at two terminals 11.
  • a microprocessor 9 for instance of the Motorola P18 type
  • an electronic switch 10 for instance, a Triac
  • the microprocessor 9 comprises respective inputs 13, 14, 15 and 16 that are driven by the control device 5, the temperature sensor 7 of the cold storage compartment 3, a sensor 17 adapted to detect the ambient temperature Ta, and the door-opening magnetic sensor 12, respectively.
  • the microprocessor 9 has two outputs 18 through which it is capable of cyclically energize the compressor 8, via a relay 19 or the like, in accordance with the temperature Tr set on the control device 5 (for instance, 5°C) and the temperature detected by the sensor 7, which preferably detects the temperature of the air in the interior of the cold storage compartment 3.
  • the cyclic energizations of the compressor 8 are therefore in this way normally able to keep the temperatures in the compartments 3 and 4 at their respective rated or set values through a sequence of cooling phases alternating with pauses or resting phases of the respective evaporators.
  • the sensor 12 When the sensor 12 detects an open-door condition, it drives the input 16 of the microprocessor 9 with a control signal in response to which the microprocessor 9 then drives in turn the Triac 10 so as to let the lamp 6 be supplied at the required power rating to illuminate the interior of the cold storage compartment 3.
  • the inputs 13 and 15 of the microprocessor 9 are driven by the control device 5 and the sensor 17 with a reference signal and a signal that is indicative of the temperature Ta of the room in which the apparatus is installed, respectively.
  • the microprocessor 9 is adapted tosupply the lamp 6 also when the sensor 12 actually detects a closed-door condition, preferably when the compressor 8 is in a de-energization phase, in the case that the temperature Ta detected by the sensor 17 is lower than a pre-determined value (for instance, 20°C).
  • the microprocessor 9 is set so as to supply the lamp 6 at a power rating that is variable (in a linear manner or at discrete levels, from a minimum value to a maximum value) in accordance with the above cited temperatures Tr and Ta.
  • the microprocessor 9 is adapted to let the lamp 6 operate as a temperature balancing device at a power rating that is variable according to a pre-determined correlation (built into the same microprocessor 9) between the temperatures Tr and Ta.
  • a pre-determined correlation built into the same microprocessor 9 between the temperatures Tr and Ta.
  • a correlation may be of the matrix type and can be most easily set in the microprocessor 9 by anyone skilled in the art.
  • Such a power adjustment can for instance be easily obtained through a phase control of the gate signal of the Triac 10, in a per sè known manner, in accordance with the outcome of the correlation between the above cited parameters.
  • the above cited correlation of the temperatures Tr and Ta is preferably determined by the microprocessor 9 by identifying the values of said temperatures based on the signals it receives at its inputs 13 and 15, as described afore in greater detail. It can however be easily appreciated that, as an alternative solution, the above cited correlation may be determined by the microprocessor 9 in an indirect manner, for instance by identifying the ratio of the operation times to the pause times of the compressor 8 Such a time ratio is in fact indicative of the temperatures Tr and Ta according to determined parameters that can be easily calculated by those skilled in the art.
  • the lamp 6 is in this way able to operate as a temperature balancing healing element at a power rating that is each time correlated to the actual requirements of the refrigeration apparatus.
  • the risk is in this way advantageously avoided of a thermal power of the lamp 6 proving insufficient under conditions of particularly low ambient temperature Ta or, conversely, of a thermal power of said lamp 6 being excessively high when said ambient temperature is not particularly low.
  • a single switch 10 controlled by the microprocessor 9 is capable of supplying the lamp 6 for it to operate both as an illumination element and temperature balancing heating element.
  • the refrigeration apparatus according to the present invention may be of a more traditional type, ie. of the type using temperature balancing heating means that are distinct from the illumination lamp 6. Also in this case, in fact, the operation of the apparatus will be improved by letting the temperature balancing means operate at a power rating that is correlated to the afore cited parameters, in particular the ambient temperature Ta and the set temperature Tr.

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)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
EP19990117317 1998-10-22 1999-09-03 Kältegerät mit Temperaturausgleichseinrichtung Expired - Lifetime EP0995957B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1998PN000076 IT1305526B1 (it) 1998-10-22 1998-10-22 Apparecchio refrigerante con dispositivo di bilanciamentotermico
ITPN980076 1998-10-22

Publications (3)

Publication Number Publication Date
EP0995957A2 true EP0995957A2 (de) 2000-04-26
EP0995957A3 EP0995957A3 (de) 2000-11-02
EP0995957B1 EP0995957B1 (de) 2004-04-28

Family

ID=11395434

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990117317 Expired - Lifetime EP0995957B1 (de) 1998-10-22 1999-09-03 Kältegerät mit Temperaturausgleichseinrichtung

Country Status (4)

Country Link
EP (1) EP0995957B1 (de)
DE (1) DE69916739T2 (de)
ES (1) ES2221275T3 (de)
IT (1) IT1305526B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000065289A1 (de) * 1999-04-23 2000-11-02 BSH Bosch und Siemens Hausgeräte GmbH Kühlgerät
EP1344998A1 (de) * 2002-03-13 2003-09-17 Electrolux Home Products Corporation N.V. Mit einem Kompressor versehene Kühlvorrichtung mit Temperaturregelung zweier Ablagefächer
EP1460361A1 (de) * 2003-03-21 2004-09-22 Signal Lux MDS S.r.l. Regler für ein Kältegerät
CN111503988A (zh) * 2020-02-24 2020-08-07 合肥美的电冰箱有限公司 用于冰箱的控制方法、控制装置、冰箱和存储介质

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29707866U1 (de) 1997-04-30 1997-09-25 Bosch-Siemens Hausgeräte GmbH, 81669 München Kühlgerät

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2780441A (en) * 1954-12-21 1957-02-05 Herbert C Rhodes Automatic control system for combined freezer and cooler
IT1245076B (it) * 1991-04-18 1994-09-13 Merloni Elettrodomestici Spa Frigorifero
DE4210603A1 (de) * 1992-03-31 1992-10-15 Zanussi Elettrodomestici Kuehlvorrichtung mit temperaturfuehler

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29707866U1 (de) 1997-04-30 1997-09-25 Bosch-Siemens Hausgeräte GmbH, 81669 München Kühlgerät

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000065289A1 (de) * 1999-04-23 2000-11-02 BSH Bosch und Siemens Hausgeräte GmbH Kühlgerät
EP1344998A1 (de) * 2002-03-13 2003-09-17 Electrolux Home Products Corporation N.V. Mit einem Kompressor versehene Kühlvorrichtung mit Temperaturregelung zweier Ablagefächer
EP1460361A1 (de) * 2003-03-21 2004-09-22 Signal Lux MDS S.r.l. Regler für ein Kältegerät
CN111503988A (zh) * 2020-02-24 2020-08-07 合肥美的电冰箱有限公司 用于冰箱的控制方法、控制装置、冰箱和存储介质
CN111503988B (zh) * 2020-02-24 2023-01-24 合肥美的电冰箱有限公司 用于冰箱的控制方法、控制装置、冰箱和存储介质

Also Published As

Publication number Publication date
EP0995957A3 (de) 2000-11-02
IT1305526B1 (it) 2001-05-09
DE69916739T2 (de) 2004-09-30
EP0995957B1 (de) 2004-04-28
ITPN980076A1 (it) 2000-04-22
ES2221275T3 (es) 2004-12-16
DE69916739D1 (de) 2004-06-03

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