EP1470375B1 - Appareil frigorifique a reglage de la temperature de l'air - Google Patents

Appareil frigorifique a reglage de la temperature de l'air Download PDF

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Publication number
EP1470375B1
EP1470375B1 EP03704372A EP03704372A EP1470375B1 EP 1470375 B1 EP1470375 B1 EP 1470375B1 EP 03704372 A EP03704372 A EP 03704372A EP 03704372 A EP03704372 A EP 03704372A EP 1470375 B1 EP1470375 B1 EP 1470375B1
Authority
EP
European Patent Office
Prior art keywords
temperature
evaporator
operating mode
control unit
temperature sensor
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 - Lifetime
Application number
EP03704372A
Other languages
German (de)
English (en)
Other versions
EP1470375A1 (fr
Inventor
Helmut Konopa
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete 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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1470375A1 publication Critical patent/EP1470375A1/fr
Application granted granted Critical
Publication of EP1470375B1 publication Critical patent/EP1470375B1/fr
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
    • 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
    • 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
    • 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
    • F25D2400/08—Refrigerator tables
    • 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
    • F25D2400/36—Visual displays
    • 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 a refrigerator with a heat-insulating housing, an evaporator and two surrounded by the housing, cooled by the evaporator to different target temperature spaces.
  • Refrigerators with internal ice compartment the walls of which are largely formed by the evaporator. Since heat from the outside can penetrate into this freezer compartment only over a small part of its surface area, it reaches significantly lower storage temperatures than the main refrigerator compartment of such a refrigerator, which surrounds the evaporator on a large part of its surface on the outside.
  • the temperature of both rooms of such a refrigeration device is controlled by means of a temperature sensor, which is arranged on the evaporator itself and detects its temperature. Since the operation of the freezer compartment, the evaporator must reach temperatures below 0 ° C, formed on prolonged operation of the refrigerator on the surface of the evaporator, a layer of frost or ice. This layer causes a thermal insulation of the evaporator relative to the main refrigerator compartment of the refrigerator, with the result that with increasing icing the evaporator absorbs less and less heat. As a result, only short operating times of a liquid refrigerant evaporator source, such as a compressor, are required to maintain the temperature sensed by the sensor within a predetermined desired range.
  • a liquid refrigerant evaporator source such as a compressor
  • a refrigerator according to the preamble of claim 1 is made EP-A-0 967 449 known.
  • Object of the present invention is to provide a refrigeration device of the type described, in which an increasing icing of the evaporator can not lead to an undesirable increase in indoor temperatures, and its operation in excessive icing a user does not cause a Defect but intuitively makes it clear that defrosting is necessary.
  • a first temperature sensor of this refrigerator By arranging a first temperature sensor of this refrigerator so that it detects the air temperature of the warmer of the two refrigerated rooms of the refrigerator, it is excluded that excessive icing of the evaporator can lead to an undesirable increase in the temperature in this room. Instead, as a result of the icing, the operating phases of the refrigerant source necessary to maintain the setpoint temperature in the space monitored by the sensor become longer and longer. The user may therefore hear if necessary that the refrigerator is working, and get to no wrong conclusions about its functionality.
  • the refrigeration device has a second temperature sensor for detecting a temperature of the evaporator or the colder of the two rooms.
  • this second temperature sensor is not used as conventionally arranged on the evaporator temperature sensors to keep the evaporator temperature constantly in a desired range, but it serves essentially as a precautionary measure to avoid maladjustment, when using only the first temperature sensor at unusually low ambient temperatures or could result in a very weak set cooling. Namely, if a weak cooling is set or the temperature of the environment in which the refrigerator is placed, only slightly above the target temperature of the warmer interior, so this leads to extremely short operating phases of the refrigerant source, which may be insufficient to the temperature in the colder of the two rooms to a sufficiently low value.
  • the control unit which controls the operation of the refrigerant source is arranged to assume a first operating mode or normal operating mode, as long as the temperature of the evaporator or of the colder space detected by the second temperature sensor is below a predetermined threshold and, in the first mode of operation, to control the operation of the source such that the temperature of the warmer room sensed by the first temperature sensor remains within a desired range.
  • the control unit changes from the first operating mode in a second operating mode or emergency cooling mode, wherein it controls the average power of the source in the second operating mode to a higher value than in the first.
  • the control unit continuously operates the source in the second mode of operation.
  • the control unit changes from the second operating mode back to the first.
  • the control unit has a user-selectable third mode of operation or defrost mode in which it does not operate the source. If the refrigeration device has a heating device for heating the evaporator, it may be provided that the control unit is set up to operate the heating device in this third operating mode in order to accelerate the defrosting.
  • control unit is further configured to automatically switch from the third mode of operation to the first or second mode of operation when the temperature detected by the second temperature sensor exceeds a third threshold indicative of complete defrost of the evaporator.
  • a third threshold indicative of complete defrost of the evaporator.
  • Fig. 1 shows a perspective view of a refrigerator as an application example of the present invention, with the door open 1.
  • the heat-insulating housing 2 of the refrigerator encloses an interior, which is divided into a normal refrigerated compartment 3 and an icebox 4.
  • the roughly cuboid icebox 4 is in an upper corner arranged in the interior. It has on its front side facing the door 1 a closable, in the figure half-opened flap 5.
  • the four adjacent to this end walls of the cuboid shape are formed by an evaporator 6, on the outer surface of lines 7 are recognizable for a refrigerant.
  • a flat shell 8 is mounted to be pulled out from. It extends over the entire base of the icebox 4 and serves to catch condensation, which drips down during defrosting of the evaporator 6 of this.
  • FIG. 2 Various functional elements of the refrigerator are in the schematic drawing of Fig. 2 shown.
  • a suction line 9 for vaporized refrigerant extends from the evaporator 6 to a compressor 10.
  • An outgoing from the compressor 10 Compressed refrigerant pressure line 11 passes through a liquefier 12 mounted on the rear side of the housing 2 before reaching the evaporator 6.
  • a control unit 13 for controlling the operation of the compressor 10 is connected to mounted on a front panel 14 of the housing 2 control and display elements 15 and 16 and two temperature sensors 17, 18, of which the first, 17, inside the normal cooling compartment 3 or is mounted on a wall thereof at a distance from the evaporator 6 to detect the prevailing in the normal refrigeration compartment 3 air temperature.
  • the second temperature sensor 18 is mounted on the evaporator 6 and detects its temperature.
  • the control unit 13 has three modes of operation. In a first operating mode, it switches on and off the compressor 10 as a function of the temperature T N detected by the temperature sensor 17 in order to keep this temperature T N within a predetermined tolerance range around a target value set by a user on one of the operating elements 15 ,
  • Fig. 3A shows the course of detected by the temperature sensor 17 temperature T N of the normal cooling compartment 3 as a function of time t. Whenever the temperature T N is at the upper edge of the tolerance range, the control unit 13 switches on the compressor 10 and keeps it in operation until the temperature T N reaches the lower limit of the tolerance range. The corresponding operating phases of the compressor 10 are in Fig. 3B shown.
  • the second temperature sensor 18 is provided.
  • Fig. 2 shows the second temperature sensor 18 mounted on the evaporator 6. Strictly speaking, with this placement of the second sensor 18, the temperature detected by it may deviate from the temperature T E prevailing in the freezer compartment 4.
  • the second sensor 18 could also be placed at a distance from the evaporator 6 in the freezer 4 in order to detect its temperature T E.
  • the control unit 13 When the second temperature sensor 18 reports a temperature above a critical first threshold of, for example, -5 ° C to the control unit 13, it changes to a second operating mode, in which the compressor 10 is operated independently of the temperature detected by the temperature sensor 17 T N , Only when the evaporator temperature has fallen below a second threshold of eg -10 ° C and thus a sufficient cooling of the freezer compartment is ensured, the control unit returns to the first operating mode.
  • a critical first threshold for example, -5 ° C
  • these two thresholds can be fixed by the manufacturer of the refrigeration device. In general, there is no need for the user to be able to specify them himself. However, it may be useful if the control unit 13 offers the user the opportunity to completely disable the second mode of operation. As a result, energy can be saved if the freezer compartment is empty and can therefore assume temperatures above the first threshold, without this leading to damage to refrigerated goods.
  • the control unit 13 is further displaceable by operating a corresponding control element 15 in a third operating mode, a defrost operating mode.
  • This mode of operation may simply be that the control unit keeps the compressor off, but monitors the temperature sensed by the temperature sensor 18 when the compressor is off, and when it reaches a positive temperature Celsius indicates a complete defrost of the evaporator 6, returns to the first or second operating mode.
  • the evaporator 6 may be equipped with a heater (not shown) operated by the control unit 13 as long as it is in its third operating mode.

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  • 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)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Defrosting Systems (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Sorption Type Refrigeration Machines (AREA)

Claims (8)

  1. Appareil frigorifique comprenant un boîtier (2) calorifuge, un évaporateur (6) et deux chambres (3, 4) entourées par le boîtier (2), refroidies à différentes températures de prescription par l'évaporateur (6), une source (10-12) destinée à alimenter l'évaporateur (6) en réfrigérant liquide, un premier capteur de température (17) et une unité de commande (13) destinée à commander le fonctionnement de la source (10-12) en fonction d'une température (TN) enregistrée par le premier capteur de température (17), lequel est disposé afin de capter la température de l'air dans la chambre plus chaude (3) des deux chambres (3, 4), et un deuxième capteur de température (18) destiné à capter une température de l'évaporateur (6) ou de la chambre plus froide (4) des deux chambres (3, 4), caractérisé en ce que l'unité de commande (13) est configurée pour prendre un premier mode de fonctionnement tant que la température enregistrée par le deuxième capteur de température (18) se situe en dessous d'un seuil prédéfini, et pour commander le fonctionnement de la source (10-12) dans le premier mode de fonctionnement, de manière à ce que la température enregistrée par le premier capteur (17) reste dans une plage de prescription.
  2. Appareil frigorifique selon la revendication 1, caractérisé en ce que l'évaporateur (6) forme une paroi qui délimite les deux chambres (3, 4) l'une de l'autre.
  3. Appareil frigorifique selon la revendication 2, caractérisé en ce que l'unité de commande (13) est configurée pour alterner du premier mode de fonctionnement en un deuxième mode de fonctionnement lorsque la température enregistrée par le deuxième capteur de température (18) dépasse un premier seuil prédéfini et règle ainsi" dans le deuxième mode de fonctionnement, la puissance moyenne de la source (10-12) sur une valeur plus élevée que dans le premier mode de fonctionnement.
  4. Appareil frigorifique selon la revendication 3, caractérisé en ce que l'unité de commande (13) est configurée pour alterner du deuxième mode de fonctionnement au premier mode de fonctionnement lorsque la température enregistrée par le deuxième capteur de température (18) est située en dessous d'un deuxième seuil prédéfini, ce deuxième seuil étant plus bas que le premier.
  5. Appareil frigorifique selon la revendication 3 ou 4, caractérisé en ce que l'unité de commande (13) fait fonctionner la source (10-12) en continu dans le deuxième mode de fonctionnement.
  6. Appareil frigorifique selon les revendications 3 à 5, caractérisé en ce que l'unité de commande (13) dispose d'un troisième mode de fonctionnement réglable par un utilisateur, dans lequel mode elle ne fait pas fonctionner la source (10-12).
  7. Appareil frigorifique selon la revendication 5, caractérisé en ce que l'appareil frigorifique présente un dispositif de chauffage pour chauffer l'évaporateur (8) et en ce que l'unité de commande (13) est configurée pour faire fonctionner le dispositif de chauffage dans le troisième mode de fonctionnement.
  8. Appareil frigorifique selon la revendication 6 ou 7, caractérisé en ce que l'unité de commande (13) est configurée pour alterner du troisième mode de fonctionnement au premier ou au deuxième mode de fonctionnement lorsque la température enregistrée par le deuxième capteur de température (18) dépasse un troisième seuil.
EP03704372A 2002-01-21 2003-01-10 Appareil frigorifique a reglage de la temperature de l'air Expired - Lifetime EP1470375B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10202134A DE10202134A1 (de) 2002-01-21 2002-01-21 Lufttemperaturgeregeltes Kältegerät
DE10202134 2002-01-21
PCT/EP2003/000185 WO2003060402A1 (fr) 2002-01-21 2003-01-10 Appareil frigorifique a reglage de la temperature de l'air

Publications (2)

Publication Number Publication Date
EP1470375A1 EP1470375A1 (fr) 2004-10-27
EP1470375B1 true EP1470375B1 (fr) 2009-05-20

Family

ID=7712669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03704372A Expired - Lifetime EP1470375B1 (fr) 2002-01-21 2003-01-10 Appareil frigorifique a reglage de la temperature de l'air

Country Status (8)

Country Link
EP (1) EP1470375B1 (fr)
CN (1) CN100416193C (fr)
AT (1) ATE431926T1 (fr)
BR (1) BR0306819A (fr)
DE (2) DE10202134A1 (fr)
ES (1) ES2326163T3 (fr)
PL (1) PL201063B1 (fr)
WO (1) WO2003060402A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014091282A1 (fr) * 2012-12-14 2014-06-19 Industrias Haceb S.A. Réfrigérateur sans dégivrage automatique à évaporateur semi-injecté comprenant des raccordements accessibles pour la réparation

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL63406C (fr) * 1942-02-03
US2647375A (en) * 1950-05-13 1953-08-04 Philco Corp Two-temperature refrigerator with automatic defrosting
US3478818A (en) * 1966-06-01 1969-11-18 Mitsubishi Electric Corp Automatic temperature control type refrigerator
DE1808585A1 (de) * 1968-11-13 1970-05-21 Bosch Hausgeraete Gmbh Gefriergeraet,insbesondere Gefriertruhe
IT1112399B (it) * 1979-03-22 1986-01-13 Eurodomestici Ind Riunite Dispositivo termostatico elettronico per frigoriferi
US4332142A (en) * 1980-10-14 1982-06-01 General Electric Company Household refrigerator including anti-sweat heater control circuit
CN2094708U (zh) * 1991-05-30 1992-01-29 秦桂林 一种冷冻冷藏室可互换的电冰箱
CN2098656U (zh) * 1991-08-10 1992-03-11 秦桂林 一种冷冻冷藏室可互换的电冰箱
DE19828061C1 (de) * 1998-06-24 1999-12-23 Danfoss As Verfahren zur Regelung der Temperatur eines Kühlmöbels und Temperaturregelvorrichtung für ein Kühlmöbel
SE513258C2 (sv) * 1998-11-05 2000-08-07 Electrolux Ab Sätt och anordning för styrning av en temperatur i ett skåp

Also Published As

Publication number Publication date
PL201063B1 (pl) 2009-03-31
BR0306819A (pt) 2004-12-28
EP1470375A1 (fr) 2004-10-27
ATE431926T1 (de) 2009-06-15
CN100416193C (zh) 2008-09-03
CN1735780A (zh) 2006-02-15
WO2003060402A1 (fr) 2003-07-24
DE10202134A1 (de) 2003-07-31
WO2003060402A8 (fr) 2009-01-29
ES2326163T3 (es) 2009-10-02
PL369369A1 (en) 2005-04-18
DE50311532D1 (de) 2009-07-02

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