EP0651214A1 - Appareil de réfrigération ou de congélation - Google Patents

Appareil de réfrigération ou de congélation Download PDF

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Publication number
EP0651214A1
EP0651214A1 EP94111326A EP94111326A EP0651214A1 EP 0651214 A1 EP0651214 A1 EP 0651214A1 EP 94111326 A EP94111326 A EP 94111326A EP 94111326 A EP94111326 A EP 94111326A EP 0651214 A1 EP0651214 A1 EP 0651214A1
Authority
EP
European Patent Office
Prior art keywords
evaporator
refrigerator
cold
heat
cooling
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Withdrawn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
EP94111326A
Other languages
German (de)
English (en)
Inventor
Herbert Gerner
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
Liebherr Hausgeraete GmbH
Original Assignee
Liebherr Hausgeraete Ochsenhausen GmbH
Liebherr 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 Liebherr Hausgeraete Ochsenhausen GmbH, Liebherr Hausgeraete GmbH filed Critical Liebherr Hausgeraete Ochsenhausen GmbH
Publication of EP0651214A1 publication Critical patent/EP0651214A1/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Withdrawn legal-status Critical Current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
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/006—Self-contained movable devices, e.g. domestic refrigerators with cold storage accumulators

Definitions

  • the invention relates to a refrigerator or freezer with a planar or plate-shaped evaporator arranged in a housing wall delimiting a cooling space and provided with thermal insulation.
  • Refrigerators and freezers of this type are known in different embodiments.
  • the evaporator which can consist of a double-walled circuit board with embossed channels and cavities, is foamed behind a housing wall consisting of a plastic plate.
  • the object of the invention is therefore to provide a refrigerator or freezer whose cooling space is sufficiently cooled even when the power supply to the compressor is temporarily interrupted or the compressor is not operated for other reasons shall be.
  • this object is achieved in a refrigerator or freezer of the generic type in that a cold store is arranged on the side of the evaporator facing away from the refrigerator.
  • the cold storage device provided according to the invention is a space which is in heat-conducting connection with the evaporator and which is filled with a medium which is able to absorb and store a large amount of heat.
  • This medium can be a eutectic sole, for example.
  • Heat stores of this type are known, for example, in the case of so-called "cold accumulators" which are inserted in cool boxes.
  • the cold storage device can also be referred to as "latent heat storage device".
  • the cold or heat storage is known per se, so that its detailed description can be dispensed with.
  • the refrigerator or freezer equipped with the cold store according to the invention is able to maintain a sufficiently low temperature over a longer bridging period in the event of a power failure of the device in the refrigerator.
  • the device according to the invention is therefore suitable for photovoltaically operated devices in which the operation of the compressor is ensured only because of the time of day.
  • the device according to the invention can also be used, for example, in hotel operations in which noises caused by compressors are undesirable during the night. Conversely it is also possible to charge the cold storage with cheaper night-time electricity so that the compressor does not have to be operated at all during the day or only for shorter times.
  • the cold store is directly coupled to the evaporator, it is connected to the evaporator in such a way that the heat-storing medium of the cold store is only separated from the evaporator by a good heat-conducting wall. Difficulties arise in defrosting the evaporator because of defrosting is only possible if the cold storage is also emptied, ie has absorbed so much heat that the evaporator can warm up to temperatures above zero degrees. Furthermore, flexible and fast temperature control is not possible if the evaporator is directly connected to the cold storage.
  • the invention is therefore based on the further object of allowing defrosting of the evaporator and flexible temperature control, if necessary, despite the arrangement of a cold store.
  • this object is achieved in a refrigerator or freezer with the features of claim 1 in that the cold store is separated from the evaporator by a gap which, if necessary, can be filled and emptied with a highly heat-conducting liquid.
  • This embodiment of the refrigerator or freezer according to the invention makes it possible to inactivate the cold storage at any time by withdrawing the heat-conducting liquid from the gap, so that it forms a good heat-conducting layer between the evaporator and the cold storage. If the evaporator is isolated from the cold store by the gap, the evaporator can be defrosted by interrupting the supply of refrigerant.
  • the temperature in the cooling space can be essentially unaffected by conventional control of the supply of refrigerant to the evaporator control from the cold storage in the desired manner.
  • the cooling compartment can also be cooled down faster if necessary.
  • the gap between the evaporator and the cold store can be formed by a flat container, the walls of which consist of a good heat-conducting material.
  • the gap can also be formed directly by walls of the plate-shaped evaporator and a wall of the container that holds the medium of the cold store, a circumferential, narrow wall, which can be made of plastic and / or a suitable sealing material, having to be provided between the two walls.
  • a liquid-holding reservoir is provided, which is connected to the flat container by lines in which at least one valve and a pump are arranged connected is.
  • the flat container is divided into sections by at least one narrow intermediate wall, each of which can be filled and emptied with the liquid. In this way, for example, a partial defrosting of the evaporator is possible if the cooling of the cooling space is not to be completely interrupted during the defrosting.
  • the wall 1 of the housing of the refrigerator or freezer is formed by an inner shell 2, which may be made of plastic, and an outer wall 3, for example made of sheet metal, the space between the plate-shaped walls 2 , 3 is foamed with an insulating plastic 4.
  • a plate-shaped evaporator 5 is arranged immediately behind the inner shell or wall 2. This usually consists of an evaporator board. It could of course also consist of coils arranged in one plane.
  • a cold store (latent heat store) is arranged immediately behind the evaporator 5 and extends essentially over the width of the evaporator. This cold storage 6 is also a flat container of suitable thickness, which holds the medium with good heat storage Record properties, the container is in direct contact with the evaporator in the manner shown.
  • a gap-shaped space 7 is provided between the flat evaporator 5 and the cold storage 6, which can be filled with a highly thermally conductive liquid 8 as required.
  • This heat-conducting liquid 8 can be stored in a storage container 9, which is also foamed into a wall of the device above the evaporator 5.
  • the storage container 9 is connected to the gap-shaped space 7 via a line 11 in which a solenoid valve 10 is arranged.
  • a return line 12 is provided, in which a pump 13 is arranged.
  • vents of the usual type are provided in order to be able to fill and empty the gap-shaped space 7 with liquid 8, if necessary.
  • the flat container 15 forming the gap-shaped space 7 is divided into two container sections 17, 18 by a vertical partition wall 16.
  • the container sections 17, 18 are connected to one another and to the inflow and outflow lines, so that the sections 17, 18 can be filled and emptied independently of one another.
  • the purpose of the arrangement of a cooling system with latent heat storage is to operate a cooling device even when a continuous power supply to the device cannot be guaranteed or the operation of the cooling unit is to be limited to certain periods.
  • the charge during the day i.e. H. cooled latent heat storage, ensure adequate cooling for the night.
  • devices would be conceivable that are only in operation at the time when the refrigeration unit is not disturbing.
  • the operation of the devices with night power would be conceivable.
  • Evaporator coupled directly to the latent heat storage. Problem: defrosting is not possible without the memory being completely empty. The device is cooled until the memory is empty. Difficulties with temperature control are also to be expected since the cold supply cannot be interrupted.
  • Evaporators and latent heat storage are not directly coupled. There is a cavity between the evaporator and the latent heat store, which has poor thermal conductivity in the unfilled state. A connection between the evaporator and the latent heat storage can be established by means of a thermally conductive liquid.
  • the liquid is circulated by a small pump.
  • the pump would only have to be operated briefly in order to raise the liquid to an appropriate level. If necessary, the liquid is then drained from the higher-lying container into the necessary spaces.
  • the device can be cooled briefly if the evaporator is operated without coupling and the entire cooling capacity can thus be used to cool the interior.
  • the memory can be charged when the evaporator is operated in the coupled state.
  • the cold room is also cooled, but with reduced performance. If there is a coupling and the evaporator is not operated, the device is cooled from the storage tank.
  • the coupling can be interrupted sufficiently (the insulating distance between the evaporator and the latent heat storage is sufficiently large) and the internal temperature does not rise too much until the defrosting has taken place, since the heat from the rear wall directly defrosts supported the evaporator, not applicable.
  • the defrosting process could be supported by a fan.
  • the intermediate space By designing or dividing the intermediate space into different zones, it is possible to only partially create the coupling between the evaporator and the latent heat store. In the meantime, the temperature of the zones that are not coupled to the storage unit can rise to the cold room temperature, ie the evaporator thaws in this zone while the device is still being cooled.

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)
EP94111326A 1993-11-02 1994-07-20 Appareil de réfrigération ou de congélation Withdrawn EP0651214A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9316729U DE9316729U1 (de) 1993-11-02 1993-11-02 Kühl- oder Gefriergerät
DE9316729U 1993-11-02

Publications (1)

Publication Number Publication Date
EP0651214A1 true EP0651214A1 (fr) 1995-05-03

Family

ID=6900188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94111326A Withdrawn EP0651214A1 (fr) 1993-11-02 1994-07-20 Appareil de réfrigération ou de congélation

Country Status (2)

Country Link
EP (1) EP0651214A1 (fr)
DE (1) DE9316729U1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999009359A1 (fr) 1997-08-14 1999-02-25 Etc Energietechnik Und Chemie Gmbh & Co. Kg Installation refrigerante fonctionnant a l'energie solaire
EP0903550A1 (fr) * 1997-09-19 1999-03-24 Aktiebolaget Electrolux Dispositif pour refroidissement rapide d'un objet dans un réfrigérateur
WO1999024771A1 (fr) 1997-11-12 1999-05-20 Etc Energietechnik Und Chemie Gmbh & Co. Kg Dispositif et procede destines au fonctionnement de refrigerateurs et congelateurs
WO2010149402A1 (fr) 2009-06-25 2010-12-29 Cambridge Design Research Llp Appareil et procédés de distribution

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009052558A1 (de) * 2009-08-24 2011-03-03 Liebherr-Hausgeräte Lienz Gmbh Kühl- und/oder Gefriergerät

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB378261A (en) * 1930-10-23 1932-08-11 Bosch Robert Improvements in refrigerators
DE926553C (de) * 1952-02-22 1955-04-21 Hendrikus Petrus Corneli Jamin Kuehlschrank
DE2521757A1 (de) * 1975-05-16 1976-11-25 Motta Gmbh Mobiler kuehlbehaelter mit verbesserter kaeltespeicherkapazitaet
DE2725347B2 (de) * 1977-06-04 1979-06-21 Schmidt'sche Heissdampf-Gesellschaft Mbh, 3500 Kassel Wärmeaustauschverfahren, insbesondere zum Kühlen von Spaltgasen, und Wärmeaustauscher zum Durchführen des Verfahrens
US4161212A (en) * 1977-01-28 1979-07-17 Martin Marietta Corporation Pneumatically controlled wide heat load space radiator
US4858678A (en) * 1988-06-02 1989-08-22 The Boeing Company Variable heat conductance heat exchanger
US4951481A (en) * 1988-03-17 1990-08-28 Sanden Corporation Refrigerator with efficient cold accumulator
EP0566518A1 (fr) * 1992-04-15 1993-10-20 Bellevue Holdings Limited Conteneur isotherme et réfrigéré avec accumulateur de froid

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR920003697B1 (ko) * 1989-11-13 1992-05-09 최영택 전기석축냉·열식 냉난방 시스템(system)
DE4142842A1 (de) * 1991-09-26 1993-04-01 Wolfgang Wasserthal Tragbares kuehlbehaeltnis
DE4142843A1 (de) * 1991-09-26 1993-04-01 Wolfgang Wasserthal Tragbares kuehlbehaeltnis

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB378261A (en) * 1930-10-23 1932-08-11 Bosch Robert Improvements in refrigerators
DE926553C (de) * 1952-02-22 1955-04-21 Hendrikus Petrus Corneli Jamin Kuehlschrank
DE2521757A1 (de) * 1975-05-16 1976-11-25 Motta Gmbh Mobiler kuehlbehaelter mit verbesserter kaeltespeicherkapazitaet
US4161212A (en) * 1977-01-28 1979-07-17 Martin Marietta Corporation Pneumatically controlled wide heat load space radiator
DE2725347B2 (de) * 1977-06-04 1979-06-21 Schmidt'sche Heissdampf-Gesellschaft Mbh, 3500 Kassel Wärmeaustauschverfahren, insbesondere zum Kühlen von Spaltgasen, und Wärmeaustauscher zum Durchführen des Verfahrens
US4951481A (en) * 1988-03-17 1990-08-28 Sanden Corporation Refrigerator with efficient cold accumulator
US4858678A (en) * 1988-06-02 1989-08-22 The Boeing Company Variable heat conductance heat exchanger
EP0566518A1 (fr) * 1992-04-15 1993-10-20 Bellevue Holdings Limited Conteneur isotherme et réfrigéré avec accumulateur de froid

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999009359A1 (fr) 1997-08-14 1999-02-25 Etc Energietechnik Und Chemie Gmbh & Co. Kg Installation refrigerante fonctionnant a l'energie solaire
EP0903550A1 (fr) * 1997-09-19 1999-03-24 Aktiebolaget Electrolux Dispositif pour refroidissement rapide d'un objet dans un réfrigérateur
WO1999024771A1 (fr) 1997-11-12 1999-05-20 Etc Energietechnik Und Chemie Gmbh & Co. Kg Dispositif et procede destines au fonctionnement de refrigerateurs et congelateurs
WO2010149402A1 (fr) 2009-06-25 2010-12-29 Cambridge Design Research Llp Appareil et procédés de distribution

Also Published As

Publication number Publication date
DE9316729U1 (de) 1995-03-02

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