EP0805321A1 - Appareil de réfrigération et/ou de congélation - Google Patents

Appareil de réfrigération et/ou de congélation Download PDF

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Publication number
EP0805321A1
EP0805321A1 EP96114834A EP96114834A EP0805321A1 EP 0805321 A1 EP0805321 A1 EP 0805321A1 EP 96114834 A EP96114834 A EP 96114834A EP 96114834 A EP96114834 A EP 96114834A EP 0805321 A1 EP0805321 A1 EP 0805321A1
Authority
EP
European Patent Office
Prior art keywords
connection opening
refrigerator
interior
freezer
freezer according
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
EP96114834A
Other languages
German (de)
English (en)
Other versions
EP0805321B1 (fr
Inventor
Matthias Thaler
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 Werk Lienz GmbH
Original Assignee
Liebherr Werk Lienz 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
Priority claimed from DE19628278A external-priority patent/DE19628278A1/de
Application filed by Liebherr Werk Lienz GmbH filed Critical Liebherr Werk Lienz GmbH
Publication of EP0805321A1 publication Critical patent/EP0805321A1/fr
Application granted granted Critical
Publication of EP0805321B1 publication Critical patent/EP0805321B1/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
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042—Air treating means within refrigerated spaces
    • F25D17/047—Pressure equalising 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
    • 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
    • F25D2400/10—Refrigerator top-coolers

Definitions

  • the invention relates to a refrigerator and / or freezer according to the preamble of claim 1.
  • Refrigerators and freezers as well as fridge-freezers consist of an interior with one or more doors or lids.
  • the surfaces of the interior are cooled by an intermittently operating cooling device, for example a compressor cooling system, in order to bring the goods stored in the refrigerator and freezer or the fridge-freezer combination to a desired low temperature or to keep them there.
  • an intermittently operating cooling device for example a compressor cooling system
  • the temperatures in the closed interior are lowered, as a result of which the pressure of the air in the interior drops compared to the pressure of the ambient atmosphere. Due to this pressure difference, ambient air flows uncontrollably through the finest leaks into the interior, so that the pressure difference is compensated for over time. With the comparatively warmer ambient air, moisture is transported into the interior, which due to the lower dew point is reflected on the cold surfaces of the interior, for example on the evaporator. This precipitation freezes in a freezer due to the low temperatures inside.
  • the object of the invention is to develop a generic refrigerator and / or freezer such that the icing in the interior of the device is reduced to a minimum and thus the defrosting frequency is minimized and on the other hand a quick opening of the device is made possible after each closing of the door or the lid .
  • this object is achieved on the basis of a generic refrigerator and / or freezer by the features of the characterizing part of the main claim. Accordingly, a connection opening between the interior of the device and the ambient atmosphere is created. Pressure equalization can take place specifically through this opening. In addition, the air exchanged through the connection opening is adjusted according to the invention to a desired degree of drying. For this purpose, air drying is carried out within the connection opening.
  • regenerable drying agents for example molecular sieves
  • regenerable drying agents for example molecular sieves
  • the compressor runtime i.e. the incoming ambient air is dried during the cooling phase, in which a vacuum is generated inside the device.
  • the moisture it contains is absorbed, for example, by the molecular sieve and bound there.
  • the air in the interior of the device heats up, creating excess pressure in the interior. This allows the dry, cold air to flow outside and remove the moisture from the molecular sieve.
  • the moisture is transported outside and released back into the outside atmosphere.
  • Freeze-drying is an alternative way of extracting the moisture from the ambient air flowing into the interior.
  • the surface of the connection opening is operatively connected to cooling heat transfer elements.
  • the cooling system itself can thus be used to cool the surface of the connection opening.
  • heat is supplied during the compressor downtime.
  • the waste heat from the cooling system itself can be brought into contact with the connection opening.
  • an external heat source for example an electric heater, can also be used to defrost the ice deposited on the surface of the connection opening.
  • the freezer 10 shown in FIG. 1 has a coolable interior 12 in which the goods to be cooled or frozen can be stored.
  • the cooling takes place through cooled inner walls 14.
  • the cooling of the inner walls 14 takes place via heat exchanger tubes 16, which are connected to a compressor cooling system, not shown here.
  • the interior 12 can be closed by a cover 18, a largely tight sealability being ensured by circumferential seals 20.
  • pressure equalization takes place during the cooling process by the inflow of comparatively moist ambient air via fine leaks in the sealing area of the seal 20 into the interior 12. This is shown in FIG. 1 by corresponding arrows a indicated.
  • the embodiment according to the invention shown in FIG. 2 basically relates to a freezer which corresponds in structure to that according to the prior art. Therefore, the same parts are provided with the same reference numerals here.
  • the freezer according to the invention according to FIG. 2 has a connection opening 24 between the interior 12 and the ambient atmosphere, which is integrated in the cover 18 in the embodiment shown here.
  • a molecular sieve bed 26 is contained within the connection opening 24.
  • the connection opening 24 ensures that, depending on the pressure ratio between the interior 12 and the surrounding atmosphere, air can be exchanged in a targeted manner. During the compressor runtime, in which a negative pressure forms in the interior 12, the more or less moist ambient air is sucked in.
  • connection opening between the interior 12 and the ambient atmosphere is integrated in a side wall 28.
  • the heat transfer elements 16 are coupled to the connecting line 24 via corresponding connections 30, so that the connecting opening 24 is also cooled by the compressor during cooling.
  • the moist air flowing in in the double arrow direction d is cooled down to the desired dew point in the connection opening.
  • the extracted moisture settles on the wall of the connection opening in the form of ice or frost deposits and thus no longer reaches the interior 12.
  • the connection opening 24, on the other hand is connected to the waste heat area of the cooling system (not shown here) via heat exchange elements 32 .
  • connection opening 24 is heated with the waste heat of the cooling system via the heat exchangers 32, so that the ice build-up formed can thaw.
  • the opening 34 of the connection opening into the outside atmosphere is arranged below the opening 36 in the interior 12, so that the defrosted water runs outwards.
  • FIG. 4 largely corresponds to that according to FIG. 3.
  • an external heat source in the form of an electric heater 38 is connected to the connection opening 24 here.
  • This external heat source is provided for defrosting the ice or frost surface deposited within the connection opening.

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)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Drying Of Solid Materials (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP96114834A 1996-05-03 1996-09-16 Appareil de réfrigération et/ou de congélation Expired - Lifetime EP0805321B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19617812 1996-05-03
DE19617812 1996-05-03
DE19628278A DE19628278A1 (de) 1996-05-03 1996-07-12 Kühl- und/oder Gefriergerät
DE19628278 1996-07-12

Publications (2)

Publication Number Publication Date
EP0805321A1 true EP0805321A1 (fr) 1997-11-05
EP0805321B1 EP0805321B1 (fr) 2001-12-05

Family

ID=26025371

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96114834A Expired - Lifetime EP0805321B1 (fr) 1996-05-03 1996-09-16 Appareil de réfrigération et/ou de congélation

Country Status (3)

Country Link
EP (1) EP0805321B1 (fr)
AT (1) ATE210268T1 (fr)
ES (1) ES2169187T3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1845321A1 (fr) 2006-01-30 2007-10-17 Whirlpool Corporation Réfrigérateur avec dispositif d'absorption d'humidité
EP1659356A3 (fr) * 2004-11-17 2009-03-04 Liebherr-Hausgeräte Lienz GmbH Réfrigérateur et/ou congélateur
CN102171521A (zh) * 2008-09-30 2011-08-31 赛默飞世尔科技(阿什维尔)有限责任公司 通过主动循环减少霜
EP2520882A1 (fr) * 2011-05-02 2012-11-07 Whirlpool Corporation Congélateur doté d'une formation réduite de givre
EP3364135B1 (fr) * 2017-02-16 2020-07-22 Whirlpool Corporation Congélateur coffre
WO2020161572A1 (fr) * 2019-02-07 2020-08-13 Rep Ip Ag Contenant de transport

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2259986A (en) * 1939-08-30 1941-10-21 Gen Electric Refrigerator
US2604760A (en) * 1950-04-29 1952-07-29 Gen Electric Moisture collecting and removing arrangement
CH397740A (de) * 1961-08-25 1965-08-31 Bosch Gmbh Robert Kühlschrank
US3826106A (en) * 1972-12-14 1974-07-30 Kemp R Refrigeration apparatus and process
US5271762A (en) * 1992-09-29 1993-12-21 Schoofs Gregory R Apparatus and method for air drying with reduced oxygen enrichment
US5339644A (en) * 1993-04-29 1994-08-23 Singh Kanwal N Defrost system for refrigeration apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2259986A (en) * 1939-08-30 1941-10-21 Gen Electric Refrigerator
US2604760A (en) * 1950-04-29 1952-07-29 Gen Electric Moisture collecting and removing arrangement
CH397740A (de) * 1961-08-25 1965-08-31 Bosch Gmbh Robert Kühlschrank
US3826106A (en) * 1972-12-14 1974-07-30 Kemp R Refrigeration apparatus and process
US5271762A (en) * 1992-09-29 1993-12-21 Schoofs Gregory R Apparatus and method for air drying with reduced oxygen enrichment
US5339644A (en) * 1993-04-29 1994-08-23 Singh Kanwal N Defrost system for refrigeration apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1659356A3 (fr) * 2004-11-17 2009-03-04 Liebherr-Hausgeräte Lienz GmbH Réfrigérateur et/ou congélateur
EP1845321A1 (fr) 2006-01-30 2007-10-17 Whirlpool Corporation Réfrigérateur avec dispositif d'absorption d'humidité
US7797963B2 (en) 2006-01-30 2010-09-21 Whirlpool Corporation Refrigerator with moisture adsorbing device
CN102171521A (zh) * 2008-09-30 2011-08-31 赛默飞世尔科技(阿什维尔)有限责任公司 通过主动循环减少霜
EP2520882A1 (fr) * 2011-05-02 2012-11-07 Whirlpool Corporation Congélateur doté d'une formation réduite de givre
EP3364135B1 (fr) * 2017-02-16 2020-07-22 Whirlpool Corporation Congélateur coffre
WO2020161572A1 (fr) * 2019-02-07 2020-08-13 Rep Ip Ag Contenant de transport

Also Published As

Publication number Publication date
ES2169187T3 (es) 2002-07-01
ATE210268T1 (de) 2001-12-15
EP0805321B1 (fr) 2001-12-05

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