EP1742001B1 - Réfrigérateur et/ou congélateur - Google Patents

Réfrigérateur et/ou congélateur Download PDF

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Publication number
EP1742001B1
EP1742001B1 EP20060013973 EP06013973A EP1742001B1 EP 1742001 B1 EP1742001 B1 EP 1742001B1 EP 20060013973 EP20060013973 EP 20060013973 EP 06013973 A EP06013973 A EP 06013973A EP 1742001 B1 EP1742001 B1 EP 1742001B1
Authority
EP
European Patent Office
Prior art keywords
value
switch
evaporator
refrigerator
temperature
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.)
Expired - Fee Related
Application number
EP20060013973
Other languages
German (de)
English (en)
Other versions
EP1742001A2 (fr
EP1742001A3 (fr
Inventor
Holger Jendrusch
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.)
Liebherr Hausgeraete Ochsenhausen GmbH
Original Assignee
Liebherr Hausgeraete Ochsenhausen GmbH
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 Liebherr Hausgeraete Ochsenhausen GmbH filed Critical Liebherr Hausgeraete Ochsenhausen GmbH
Publication of EP1742001A2 publication Critical patent/EP1742001A2/fr
Publication of EP1742001A3 publication Critical patent/EP1742001A3/fr
Application granted granted Critical
Publication of EP1742001B1 publication Critical patent/EP1742001B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/29—High ambient 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/31—Low ambient 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • 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
    • F25D2700/14—Sensors measuring the temperature outside the refrigerator or freezer

Definitions

  • the invention relates to a refrigerator and / or freezer with a cooling circuit comprising at least one evaporator and at least one compressor, with a temperature sensor arranged in the region of the evaporator and with a control unit, which is in communication with the temperature sensor and with the compressor and the is designed so that it turns on the compressor when the temperature measured by means of the temperature sensor exceeds an upper limit (switch-on).
  • Known refrigerators and fridge-freezers have an evaporator on which a temperature sensor is arranged, which emits a characteristic of the evaporator temperature actual temperature. If the evaporator temperature increases when the compressor of the refrigeration circuit is switched off due to the incidence of heat and if this exceeds the 0 ° C limit, the evaporator defrosts. The defrosting of the evaporator is desirable to always ensure a good efficiency of the evaporator and thus a good cooling performance. If the actual temperature value determined by means of the evaporator temperature sensor reaches or exceeds a certain limit value (referred to below as the switch-on value), causes a control unit to turn on the compressor, whereupon the evaporator temperature drops.
  • a certain limit value referred to below as the switch-on value
  • the compressor When a lower limit value is reached (referred to below as the switch-off value), the compressor is switched off again. Due to the incidence of heat it comes again to a warming and thus to an increase in temperature at the evaporator temperature sensor, which again causes the control unit to turn on the compressor when the switch-on is reached again or exceeded.
  • the temperature during operation of the refrigerator and / or freezer oscillates between two values, wherein the resulting temperature profile may be, for example, sinusoidal or sawtooth with straight or curved lines or flanks.
  • the switch-on of the evaporator sensor is set correspondingly high, that is, the limit at which the compressor is turned on again, is comparatively high. This ensures that the evaporator is exposed for a sufficient amount of time to a temperature at which defrosting can occur.
  • a disadvantage of this high setting of the switch-on value is that this value has an effect at medium ambient temperatures, for example at 25 ° C. or even higher values, in such a way that comparatively large temporal temperature fluctuations occur in the space to be cooled, which is not optimal for energetic reasons is.
  • the setting temperature of the refrigeration section is calculated from the minimum and maximum values of the standard measuring points of the room to be cooled, said switch-on value considerably influences this setting temperature. If very high ambient temperatures, for example from 38 ° C. to 43 ° C., may result that the required minimum value of 5 ° C. of the cooling part is no longer achieved due to the comparatively high switch-on value, which precludes suitability of the device for certain areas of use can.
  • the US 6,006,530 discloses a refrigerator in the interior of which a fan is arranged to introduce the cold air cooled by the evaporator into the refrigeration compartment.
  • the fan is operated so that its rotational speed is increased with decreasing evaporator temperature.
  • the apparatus includes or is in communication with an ambient temperature sensor which senses the ambient temperature of the refrigerator and / or freezer, and that there is provided a unit for changing the ON value associated with the ambient temperature sensor and such is designed that at higher ambient temperatures, a lower switch-on value is set or selected as compared to lower ambient temperatures.
  • the control behavior of the device is thus improved by the use of an ambient temperature sensor and by the ambient temperature dependent switch-on values, that is to say limit values of the evaporator temperature at which the compressor is switched on.
  • the turn-on of the evaporator sensor, in which the compressor is turned on be set much lower at high ambient temperatures. It is conceivable, for example, that the limit at which the control unit causes the compressor to switch on is at low ambient temperatures at + 5 ° C. and at high ambient temperatures, for example at 0 ° C. or even lower.
  • switch-on values of less than 0 ° C is conceivable, as the temperature curve will reverberate after switching on the compressor so that a temperature rise above 0 ° C can occur, even if the switch-on value is 0 ° C or below 0 ° C ,
  • the unit for changing the switch-on value is designed such that the switch-on value is not changed within predetermined ranges of the ambient temperature and is reduced when reaching or exceeding an upper range limit and increased when a lower range limit is reached or exceeded. It is conceivable, for example, that one, two, three or more than three such areas are provided.
  • control unit has a characteristic map which has certain ambient temperature ranges and upper limit values assigned thereto, that is, switch-on values for switching on the compressor.
  • control unit checks in which area the temperature measured by means of the evaporator temperature sensor falls and then determines the associated switch-on value.
  • the unit for changing the switch-on value is designed such that the switch-on value is changed continuously with the change of the ambient temperature. It is conceivable, for example, that the correct switch-on value based on the measured ambient temperature value is determined on the basis of a formula-related relationship between the ambient temperature and the switch-on value.
  • the change of the upper limit value or of the switch-on value can thus take place stepwise or continuously.
  • the unit for changing the switch-on is part of the control unit.
  • the unit for changing the switch-on value and the control unit are two separate components. It can thus be a structural unit or even different units.
  • a test means which compares the actual value of the temperature of the space to be cooled, for example, the cooling compartment of the device with a desired value and which is designed such that it makes a correction of the switch-on if the temperature setpoint is not or not within reached or fallen short of a certain period of time.
  • the test means makes a reduction of the switch-on value, so that the compressor is already switched on at lower temperatures and thus earlier a cooling power is generated. In this way, a compromise between achieving the desired temperature of the space to be cooled and ensuring the defrosting of the evaporator can be achieved.
  • the temperature sensor can be arranged directly on the evaporator, preferably in a sensor channel arranged on the evaporator or also in the region of the evaporator. It thus measures the evaporator temperature or the temperature of the atmosphere immediately surrounding the evaporator.
  • the control unit is designed such that it switches off the compressor when the temperature measured by the temperature sensor falls below a lower limit, ie a switch-off and that the switch-off is also changed in a change of the switch-on. It is conceivable that at a subsidence of the switch-on value, which makes sense at comparatively high ambient temperatures, cooling down to a very low switch-off value is not absolutely necessary. It can therefore be provided that the switch-off value is raised when the switch-on value is reduced, so that the span between the two limit values and thus also the temperature fluctuations are reduced.
  • the refrigerator and / or freezer according to the invention has a control unit which is connected on the one hand to the compressor of the cooling circuit and on the other hand with a temperature sensor which is received in a sensor channel of the evaporator of the device. Furthermore, a temperature sensor is connected to the control unit, which detects the ambient temperature of the device.
  • the ambient temperature sensor may be located directly on the device or even spaced therefrom.
  • the control unit has a map in which three ranges of ambient temperature with associated turn-on values, i. with the values of the measured by the evaporator temperature sensor temperature at which the compressor of the device is turned on, are linked.
  • the map is designed such that low ambient temperatures in the range below 16 ° C, for example, between 10 ° C and 16 ° C relatively high switch-on, that is, upper limits of, for example, 5 ° C are assigned. If the evaporator temperature sensor reports this temperature value, the control unit causes the compressor to be switched on at an ambient temperature in the range between 10 ° C and 16 ° C. As long as the temperature in the area of the evaporator is above 0 ° C, defrosting of the evaporator occurs.
  • the map of the control unit comprises a second range, for example, above 16 ° C to 38 ° C of the ambient temperature, which is associated with a lower turn-on value, for example, of 2.5 ° C.
  • a second range for example, above 16 ° C to 38 ° C of the ambient temperature, which is associated with a lower turn-on value, for example, of 2.5 ° C.
  • the map of the control unit has a third range from 38 ° C, for example, 38 ° C to 43 ° C, the low turn-on, for example, 0 ° C are assigned. If the value of 0 ° C is measured by the evaporator temperature sensor at such a high ambient temperature, the compressor is switched on. The switching on of the compressor and the associated cooling at comparatively low temperatures has the advantage that the cold room temperature can be maintained even at very high ambient temperatures, so that the required climate class ST (subtropical) or T (tropical) can be achieved.
  • the present invention ensures that defrosting is effectively ensured at low ambient temperatures, lower refrigerator temperature variations are obtained at ambient ambient temperatures, such as room temperature, which provides energy benefits, and achieves the required climate class at high ambient temperatures due to low turn-on values can be.

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)

Claims (9)

  1. Réfrigérateur et/ou congélateur avec un circuit de réfrigération, qui comprend au moins un évaporateur et au moins un compresseur, avec une sonde de température d'évaporateur disposée au niveau de l'évaporateur et avec un dispositif de commande relié à la sonde de température d'évaporateur et au compresseur et qui est conçu de façon à ce qu'il mette en marche le compresseur lorsque la température mesurée par la sonde de température d'évaporateur dépasse une valeur limite supérieure (valeur de mise en marche),
    caractérisé en ce que
    une sonde de température ambiante est prévue, qui mesure la température ambiante du réfrigérateur et/ou congélateur et en ce qu'un dispositif est prévu pour la modification de la valeur de mise en marche, qui est relié à la sonde de température ambiante et qui est conçu de façon à ce que, lorsque la température ambiante est élevée, une valeur de mise en marche est réglée ou sélectionnée, qui est plus faible que lorsque la température ambiante est basse.
  2. Réfrigérateur et/ou congélateur selon la revendication 1, caractérisé en ce que le dispositif de modification de la valeur de mise en marche est conçu de façon à ce que la valeur de mise en marche n'est pas modifiée dans des intervalles prédéterminés de la température ambiante et est diminuée lorsqu'une limite supérieure est atteinte ou dépassée et est augmentée lorsqu'une limite inférieure est atteinte ou dépassée.
  3. Réfrigérateur et/ou congélateur selon la revendication 2, caractérisé en ce que trois intervalles ou plus sont prévus.
  4. Réfrigérateur et/ou congélateur selon l'une des revendications 2 ou 3, caractérisé en ce que, à des températures ambiantes basses jusqu'à 16°C, une valeur de mise en marche élevée est réglée, à des températures ambiantes à partir de 16°C jusqu'à 38°C, une valeur de mise en marche moyenne située en dessous de la valeur de mise en marche élevée est réglée et, à des températures ambiantes à partir de 38°C, une valeur de mise en marche faible située en dessous de la valeur de mise en marche moyenne est réglée.
  5. Réfrigérateur et/ou congélateur selon la revendication 1, caractérisé en ce que le dispositif de modification de la valeur de mise en marche est conçu de façon à ce que la valeur de mise en marche est modifiée continuellement en même temps que la modification de la température ambiante.
  6. Réfrigérateur et/ou congélateur selon l'une des revendications précédentes, caractérisé en ce que le dispositif de modification de la valeur de mise en marche fait partie du dispositif de commande ou est conçu de manière séparée de celui-ci.
  7. Réfrigérateur et/ou congélateur selon l'une des revendications précédentes, caractérisé en ce qu'un moyen de contrôle est prévu, qui compare la valeur effective de la température de l'espace de l'appareil à refroidir avec une valeur de consigne de température et qui est conçu de façon à ce que la valeur de consigne de la température ne soit pas, ou du moins pas dans une période déterminée, atteinte ou de façon à ce que la valeur effective ne passe pas en dessous de la valeur de consigne.
  8. Réfrigérateur et/ou congélateur selon l'une des revendications précédentes, caractérisé en ce que la sonde de température disposée au niveau de l'évaporateur est disposée directement sur l'évaporateur, de préférence dans un canal de sonde disposé sur l'évaporateur ou à proximité de l'évaporateur.
  9. Réfrigérateur et/ou congélateur selon l'une des revendications précédentes, caractérisé en ce que le dispositif de commande est conçu de façon à ce qu'il arrête le compresseur lorsque la température mesurée à l'aide de la sonde de température passe en dessous d'une valeur limite inférieure (valeur d'arrêt) et en ce que la valeur d'arrêt est également modifiée lors d'une modification de la valeur de mise en marche.
EP20060013973 2005-07-08 2006-07-05 Réfrigérateur et/ou congélateur Expired - Fee Related EP1742001B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202005010779 2005-07-08
DE202005012456U DE202005012456U1 (de) 2005-07-08 2005-08-08 Kühl- und/oder Gefriergerät

Publications (3)

Publication Number Publication Date
EP1742001A2 EP1742001A2 (fr) 2007-01-10
EP1742001A3 EP1742001A3 (fr) 2011-09-21
EP1742001B1 true EP1742001B1 (fr) 2014-05-28

Family

ID=37075528

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060013973 Expired - Fee Related EP1742001B1 (fr) 2005-07-08 2006-07-05 Réfrigérateur et/ou congélateur

Country Status (3)

Country Link
EP (1) EP1742001B1 (fr)
DE (1) DE202005012456U1 (fr)
ES (1) ES2471405T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202008012411U1 (de) * 2008-08-14 2009-12-17 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät
DE102012007826A1 (de) * 2011-05-11 2012-11-15 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät
CN114608258A (zh) * 2022-03-11 2022-06-10 长虹美菱股份有限公司 一种基于电子膨胀阀的冰箱制冷系统化霜控制方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5524444A (en) * 1994-12-16 1996-06-11 Robertshaw Controls Company Temperature control of an appliance using ambient air temperature determination
DE19510268B4 (de) * 1995-03-21 2004-12-09 Liebherr-Hausgeräte Ochsenhausen GmbH Kühlgerät mit einem Normalkühlraum und einem Tiefkühlfach und Kühlverfahren
KR19980083487A (ko) * 1997-05-15 1998-12-05 윤종용 냉장고의 구동제어장치 및 방법
DE19828061C1 (de) * 1998-06-24 1999-12-23 Danfoss As Verfahren zur Regelung der Temperatur eines Kühlmöbels und Temperaturregelvorrichtung für ein Kühlmöbel
DE69916231D1 (de) * 1999-02-19 2004-05-13 Ranco Inc Of Delaware Wilmingt Regler und Verfahren zur Regelung der Temperatur in einem Kühlschrank
BR8200405U (pt) * 2002-03-08 2003-04-08 Quantum Ind E Com De Equipamen Controlador eletrônico para refrigerador

Also Published As

Publication number Publication date
EP1742001A2 (fr) 2007-01-10
ES2471405T3 (es) 2014-06-26
EP1742001A3 (fr) 2011-09-21
DE202005012456U1 (de) 2006-11-16

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