EP2631577A2 - Appareil de réfrigération et/ou de congélation - Google Patents

Appareil de réfrigération et/ou de congélation Download PDF

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Publication number
EP2631577A2
EP2631577A2 EP13001008.5A EP13001008A EP2631577A2 EP 2631577 A2 EP2631577 A2 EP 2631577A2 EP 13001008 A EP13001008 A EP 13001008A EP 2631577 A2 EP2631577 A2 EP 2631577A2
Authority
EP
European Patent Office
Prior art keywords
compartment
emissivity
heat
evaporator
radiation
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
EP13001008.5A
Other languages
German (de)
English (en)
Other versions
EP2631577A3 (fr
EP2631577B1 (fr
Inventor
Matthias Schenk
Michael Schick
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 EP2631577A2 publication Critical patent/EP2631577A2/fr
Publication of EP2631577A3 publication Critical patent/EP2631577A3/fr
Application granted granted Critical
Publication of EP2631577B1 publication Critical patent/EP2631577B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F25D23/00—General constructional features
    • F25D23/06—Walls
    • F25D23/065—Details
    • 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
    • F25D23/00—General constructional features

Definitions

  • the present invention relates to a refrigerator and / or freezer with at least one body having at least one outer wall and in which at least one cooled compartment is arranged, and having at least one refrigerant circuit having at least one evaporator for cooling the compartment.
  • the present invention has for its object to improve the efficiency of a refrigerator and / or freezer.
  • a refrigerator and / or freezer with the features of claim 1. Thereafter, it is provided that one or more walls of the compartment and / or at least one in the compartment befindliches element and / or one or more outer walls of the device body are partially or completely provided with means by which the emissivity with respect to the thermal radiation of said wall and / or said element is reduced.
  • the feature that the emissivity is reduced or increased means that the emissivity of the relevant component using the means mentioned is lower or greater than without the use of said means
  • the present invention is therefore based in particular on the idea to reduce the heat input into the cooled compartment in that the heat flow generated by the heat radiation is reduced compared to known devices.
  • the heat flux through thermal radiation depends on a constant, the surface temperature of the heat radiation emitting component, its size and also on the emissivity, which can be between 0 and 1.
  • a perfect mirror has the emissivity 0, an ideal black body the emissivity 1.
  • the effect of said means is that the heat radiation, which is reduced, for example, by the surface of said compartment facing the cooled interior, or also by the surface of a component located therein, such as a shelf, is reduced.
  • the heat radiation emitted is thus reduced compared to the state without the use of said means.
  • wall of the compartment is not limited to the actual inner container, but also the inner door, i. the inside of the door is included.
  • the term "compartment” is understood to mean not only the space used to hold the food to be refrigerated and / or frozen, but also the space in which the evaporator is located.
  • This evaporator space is preferably in flow communication with the storage space for receiving refrigerated or frozen goods, so that an exchange of air between the evaporator space and the storage space is possible or takes place.
  • the evaporator chamber can be separated from the storage space, for example, by a vertical partition plate or by a cooling air duct.
  • one or more radiation screens are provided inside and / or outside of the device, which at least partially reflect the heat radiation of at least one wall or at least one component of the device or otherwise largely or completely discourage the cooled interior.
  • a radiation shield is a surface which is preferably not in thermally conductive contact with other surfaces, but exchanges heat only via radiation.
  • the radiation shield is designed at least on one side with a surface with a low emissivity, in order to absorb as little heat as possible.
  • the heat radiation impinging on the radiation shield is preferably partially or completely reflected.
  • the radiation screens can be mounted, for example, on the inner container or on the inside of the door. They may be upstream of the inner container wall or the inside of the door in the direction of the cooled interior and / or extend parallel to them. It is also conceivable that the inner container itself is designed as a radiation shield.
  • radiation screens can also be attached to all other places where heat is transmitted via radiation to the device or in the cooled interior, z. B. in the compressor or between the rear panel and condenser.
  • the radiation screens can be present in single or multiple numbers and z. B. be arranged in layers to further reduce the heat input by radiation.
  • the means are provided on the surfaces of the inner wall or the inner container, preferably on the inside of the door, flap or other closure element and / or on the rear wall behind a free-hanging evaporator, through which the heat radiation is reduced.
  • the said evaporator is preferably a free-hanging evaporator.
  • a free-hanging evaporator Consider, for example, a roll bond or a Z-bond evaporator or else a flat-type evaporator or heat exchanger of a (brine) circuit which is designed in another form.
  • the device faces surfaces with very different temperatures.
  • the evaporator surface which is very cold, is in the radiation exchange with the comparatively warm surfaces of the inner container and possibly other parts in the interior of the device. If these surfaces consist of a material with a comparatively high emissivity, heat can pass directly from the inner container to the evaporator, thereby burdening the heat transfer in the refrigeration cycle.
  • the device has at least one heat exchanger and / or heat accumulator, and that the heat exchanger and / or the heat accumulator is partially or completely provided with means by which their emissivity is increased with respect to the heat radiation.
  • the heat exchanger and / or the heat accumulator is partially or completely provided with means by which their emissivity is increased with respect to the heat radiation.
  • this has the advantage that radiation is absorbed efficiently and the heat is well dissipated from the cooled compartment.
  • the invention also includes a combination of the aforementioned features, namely the reduction of the emissivity of walls of the compartment and / or at least one element located in the compartment and / or one or more outer walls of the device body and increasing the emissivity of one or more heat exchangers and / or heat storage, such as latent heat storage of the device.
  • shelves and / or shelves made of a material with a low emissivity or to provide it with a coating which has a low emissivity, such as mirrors or mirrored surfaces, glossy metal foils or metallic finishes.
  • the use of said means is not limited to the refrigerated interior. It may alternatively or additionally include the outdoor area of the device.
  • the outer wall or a portion of the outer wall such as e.g. the compressor or the rear wall of the device is designed with said means.
  • surfaces which are in the range of warm parts of the device are made of a material with a low emissivity or are provided with a coating of a material with a low emissivity.
  • metal foils in particular lustrous metal foils or even metallic finishes, may be considered as examples.
  • the low emissivity leads to a low absorption of the heat radiation or to a low emission of heat radiation, whereby the advantage is achieved that, for example, from a condenser or from a compressor, the heat can be dissipated efficiently.
  • the invention encompasses any means which result in the desired increase or decrease in the emissivity. It is conceivable that the means are the material of the relevant component itself or a coating or a three-dimensional structuring of the surface.
  • the component in question or at least its surface such as the inner container made of a material with reduced emissivity or an evaporator with an increased emissivity or to achieve the desired property (reduced or increased emissivity) by a coating.
  • the coating is a vapor deposition, coating, mirroring or gluing. This listing is exemplary in nature and not a definitive list of measures for coating components of a refrigerator and / or freezer.
  • the means by which the emissivity is reduced may be a glossy surface or coating, a sheet, a mirror, a metal foil, a polished metal or metal sheet, or a metallic finish.
  • the coatings or surface materials which can be used to change the emissivity are, for example, thin sheets or metal foils of materials such as e.g. Aluminum, copper or the like. These materials can also be used as a layer of the radiation screen (s).
  • additives which are added to a base material and reduce or increase the emissivity of at least the surface of the component as required.
  • suitable additives are metals, plastics, ceramics, pure substances, such as TiO 2 .
  • the invention also includes a surface treatment or change which leads to a change, preferably to an increase in the emissivity.
  • Such surface treatment or modification may, for example, be the structuring of the surface in order to increase the surface available for the absorption of heat radiation.
  • This structuring can take place before, after or during the production or coating process, for example by rolling, microstructuring by laser, embossing of a structure during the deep-drawing process, etc.
  • the structuring is thus preferably designed such that an enlargement of the surface of the component results.
  • the surface of an evaporator can be structured in such a way that it has an enlarged surface and thus an emissivity which is greater than that of an unstructured state.
  • Such structuring can not only be applied to evaporators, but to heat exchangers of any kind for a refrigerator and / or freezer, which are designed as desired. also in liquefiers or other heat exchangers, e.g. in devices with secondary circuit or the like.
  • the emissivity and thus also the absorption capacity of thermal radiation are increased by the use of the agents according to the invention. It is conceivable to produce an evaporator from a material which has a high emissivity or to coat the evaporator with such a material. Thus, the emissivity of the evaporator is increased from a condition without the use of the means mentioned. It is conceivable to use the evaporator e.g. by vapor deposition, painting, gluing etc. to coat. For example, a coating with a material, e.g.
  • radiator paint a black, preferably matt black finish or other black, preferably matte black version of the evaporator, in particular of non-visible evaporator surfaces.
  • a black, preferably matt black finish or other black preferably matte black version of the evaporator, in particular of non-visible evaporator surfaces.
  • these statements apply not only to evaporators, but to any heat exchangers, such as evaporators, condenser or other heat exchangers, for example, in devices with secondary circuit or similar.
  • this heat accumulator or latent heat accumulator such that they consist of a material at least in the region of their surface according to the above statements or are coated with a material which increases the emissivity of the accumulator. Also, the structuring of the surface of the memory described in more detail above is possible to increase the surface thereof.
  • the one or more heat storage or latent heat storage are attached to evaporators, condensers or other heat exchangers or at other locations in the refrigerator and / or freezer.
  • the absorption capacity of heat radiation of the memory and thus its efficiency is increased.
  • One conceivable embodiment relates to a refrigerator whose refrigerated compartment is formed by an inner container and the inside of a door.
  • a free-hanging evaporator which is designed for example as a Rollbond or Z-Bond evaporator.
  • the evaporator can be located behind a panel, which is formed for example by a partition plate and serves as a veneer, so that the evaporator is not visible.
  • the evaporator space and the storage space for holding the refrigerated and / or frozen food are in fluid communication so that cold air can pass from the evaporator to the storage space and air from the storage space to the evaporator.
  • the surface of the inner wall of the inner container and in particular the area behind the evaporator, i. the rear wall of the inner container and / or the inside of the door is provided on its side facing the cooled compartment with a coating which reduces the emissivity of the inner container or the inner door from the uncoated condition.
  • the material used for the coating for example, a mirror or a mirrored surface, a shiny surface, such as a metal foil or a sheet, preferably a highly polished sheet into consideration.
  • the emissivity can be significantly reduced.
  • the emissivity of plastic is about 0.93, that of an aluminum foil or a polished aluminum sheet is only about 0.04 to 0.05.
  • the material of the inner container including the inner side of the door, from a material which has a lower emissivity than the conventional inner container material. It is conceivable, for example, to provide the inner container material with additives which are designed such that they reduce the emissivity of the surface. Consider, for example, Metals, such as copper or aluminum, which are added to the plastic material.
  • the emissivity of the inner container walls or the inner door and / or other internals located in the cooled interior is ⁇ 0.8 and particularly preferably ⁇ 0.5.
  • the evaporator has a surface with an emissivity that is above the conventional evaporator. This can be achieved, for example, by producing the evaporator from a suitable material or by providing it with a coating which increases the emissivity and thus also the absorption capacity.
  • coatings preferably being made in a dark shade and preferably in black.
  • the reduction of the emissivity of the inner container walls has the advantage that the heat radiation emanating from them is reduced, i. the heat input into the cooled interior is reduced.
  • the evaporator has an emissivity of> 0.5 and more preferably of> 0.8. These values may also be used for other heat exchangers, e.g. the condenser or heat storage, in particular latent heat storage or their enclosure apply.
  • the increase in the emissivity of the evaporator surface has the advantage that existing heat is better absorbed and thus more effectively removed from the cooled interior.
  • evaporator matt black which is particularly not disturbing when it is covered, for example, taken in a cooling air duct or separated by a partition plate.
  • sheet metal has an emissivity of about 0.07 and matt black paint has an emissivity of 0.97.
  • the evaporator may be provided with a structuring, preferably with a microstructure, which increases its surface area and thus leads to an increase in the emissivity.
  • FIG. 1 shows by the reference numeral 10 the body of a refrigerator and / or freezer. Whose cooled interior 20 is closed by a door 30. Like this further FIG. 1 As can be seen, located on the back outside of the device, the condenser 40 and in a rear, bottom compressor superposed compressor 50th
  • FIG. 1 It is further apparent that the door is provided on its inside, ie on its side facing the cooled interior 20, with a radiation shield 60 which has a reflecting face turned towards the inside of the door 30.
  • This reflective side is indicated in the figure by the reference numeral 62 and directed to the respective "heat source”.
  • a radiation shield 60 is arranged with a reflective side 62 between the outside of the device body 10 and the condenser 40. Another radiation shield is located between the compressor 50 and the compressor as shown in FIG FIG. 1 is shown. Like this by the arrows in FIG. 1 is shown, the radiation screens 60 with the reflective side 62 cause the heat radiation emanating from the walls or components in question to be reflected at the reflecting side at least partially and thus a heat input into the device or into the cooled interior 20 is reduced. Like this FIG. 1 shows, the radiation shield 60 may be designed as a plate or as a straight surface or as a curved member.
  • FIG. 2 shows an embodiment of a refrigerator and / or freezer, in which the door is not only provided with one, but with a plurality of radiation screens 60, each having a reflective side or surface 62.
  • the arrangement of several radiation screens causes a particularly efficient prevention of heat input into the cooled interior by reflection.
  • the radiation screens can also be found in places other than those in FIGS. 1 and 2 shown points, such as attached to the inner container wall.
  • the arrangement of the radiation screens in layers further reduces the heat input by radiation.

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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)
EP13001008.5A 2012-02-27 2013-02-27 Appareil de réfrigération et/ou de congélation Active EP2631577B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012003906 2012-02-27
DE102012005782 2012-03-21

Publications (3)

Publication Number Publication Date
EP2631577A2 true EP2631577A2 (fr) 2013-08-28
EP2631577A3 EP2631577A3 (fr) 2015-08-12
EP2631577B1 EP2631577B1 (fr) 2017-06-28

Family

ID=47900417

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13001008.5A Active EP2631577B1 (fr) 2012-02-27 2013-02-27 Appareil de réfrigération et/ou de congélation

Country Status (3)

Country Link
EP (1) EP2631577B1 (fr)
DE (1) DE102013003277A1 (fr)
ES (1) ES2641362T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3633192A1 (fr) * 2018-10-01 2020-04-08 Nidec Global Appliance Austria GmbH Compresseur frigorifique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016012005A1 (de) * 2016-07-14 2018-01-18 Liebherr-Hausgeräte Lienz Gmbh Kühl- und/oder Gefriergerät

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR638201A (fr) * 1926-08-03 1928-05-19 Chicago Pneumatic Tool Co Perfectionnements aux appareils frigorifiques
DE595010C (de) * 1929-11-15 1934-03-26 Platen Munters Refrigerating S Aus spiegelnden Aluminiumfolien bestehende Kuehlschrank-Isolation
CH204041A (de) * 1936-11-16 1939-04-15 Bosch Gmbh Robert Aus Eisenblech bestehender Wärmeaustauscher für Kühlräume.
US4035608A (en) * 1975-11-17 1977-07-12 Anthony's Manufacturing Company, Inc. Multi-pane window structure
DE7807672U1 (de) * 1978-03-14 1978-06-22 G. Bauknecht Gmbh, Elektrotechnische Fabriken, 7000 Stuttgart Tiefkuehltruhe
DE3130458A1 (de) * 1980-07-25 1982-03-11 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Kuehl- oder gefriergeraet
DE3122545A1 (de) * 1981-06-05 1982-12-30 Alois Ing.(grad.) 8000 München Mack "kuehl- oder gefrierschrank"
DE10215420A1 (de) * 2001-04-26 2003-10-23 Conatis Gmbh Kühlmöbel
DE102005032121A1 (de) * 2004-07-08 2006-02-23 Bayerisches Zentrum für Angewandte Energieforschung e.V. Vorrichtung zur Reduzierung des Kühlenergiebedarfs von Kühlmöbeln

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3633192A1 (fr) * 2018-10-01 2020-04-08 Nidec Global Appliance Austria GmbH Compresseur frigorifique

Also Published As

Publication number Publication date
DE102013003277A1 (de) 2013-08-29
EP2631577A3 (fr) 2015-08-12
EP2631577B1 (fr) 2017-06-28
ES2641362T3 (es) 2017-11-08

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