EP2568238A2 - Appareil de réfrigération et/ou de congélation - Google Patents

Appareil de réfrigération et/ou de congélation Download PDF

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Publication number
EP2568238A2
EP2568238A2 EP12006289A EP12006289A EP2568238A2 EP 2568238 A2 EP2568238 A2 EP 2568238A2 EP 12006289 A EP12006289 A EP 12006289A EP 12006289 A EP12006289 A EP 12006289A EP 2568238 A2 EP2568238 A2 EP 2568238A2
Authority
EP
European Patent Office
Prior art keywords
evaporator
cooling
cooling air
wall
fan
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Withdrawn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
EP12006289A
Other languages
German (de)
English (en)
Inventor
Thomas Ertel
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 EP2568238A2 publication Critical patent/EP2568238A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/062Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042Air treating means within refrigerated spaces
    • F25D17/045Air flow control arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2317/00Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/063Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation with air guides
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2317/00Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/065Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the air return
    • F25D2317/0654Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the air return through the side
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2317/00Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/066Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the air supply
    • F25D2317/0661Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the air supply from the bottom

Definitions

  • the present invention relates to a refrigerator and / or freezer with at least one cooled interior, which is closed by at least one closure element, in particular by at least one door or the like, with at least one cooling air duct, in or on the at least one evaporator for cooling by the Cooling air channel is arranged flowing air and at least one fan which is arranged such that it causes a flow of air through the cooling air channel during operation of the fan.
  • a fan in the cooled interior of the refrigerator and / or freezer, which has the task of distributing air or cooled air in the interior.
  • axial fans are used, which are arranged in a specially designed housing.
  • no-frost devices In so-called no-frost devices is known to use a fan, which dissipates the air from the evaporator module and this blows into the compartment to be cooled. Such fans are often used as centrifugal fans.
  • refrigerators and / or freezers are known, in the cooled interior of which a cooling air duct is arranged, which is separated from the storage space for receiving the refrigerated or frozen goods by a vertical partition wall.
  • this cooling air duct is an evaporator.
  • the air movement through the cooling air duct is effected by a fan, which is located, for example, in the upper end region of the cooling air duct.
  • FIGS. 1 a and 1 b Such known from the prior art arrangement is from the FIGS. 1 a and 1 b can be seen.
  • the reference numeral 10 the cooled interior is shown, which is bounded by the inner container 20 and from the inside of the door 30.
  • the inner container 20 is surrounded by a foaming 40, which consists for example of PU foam.
  • a corresponding heat insulation may be located between the outside and the inside of the door 30.
  • the cooling air channel 50 In the rear region of the interior is the cooling air channel 50, which is bounded on the one hand by the rear wall 60 of the inner container 20 and on the other hand by the vertically arranged partition wall 70.
  • the partition wall 70 is mounted at a distance from the rear wall 60. Between the partition 70 and the rear wall 60 is the cooling air channel 50.
  • the cooling of the air is achieved by the evaporator 80, which is designed either as a foamed evaporator ( FIG. 1 a) or as a free-hanging evaporator ( FIG. 1 b) , In the latter case, the partition plate 70 is formed by the evaporator 80.
  • Reference numeral 90 designates a fan which is arranged in the upper inlet region of the cooling air channel 50 and which, during operation, conveys air into the cooling air channel 50 so that it flows through the cooling air channel from top to bottom and is cooled by the evaporator 80.
  • the evaporator 80 may be formed either as a free-hanging evaporator or as a free-hanging evaporator, as shown in the FIGS. 1 a and 1b.
  • the present invention has the object, a cooling and / or freezer of the type mentioned in such a way that the utilization of the cooling capacity of the evaporator is improved.
  • a refrigerator and / or freezer with the features of claim 1.
  • one or more air guide elements are provided, which are arranged in the cooling air passage or relative to the cooling air passage such that they cause a widening or equalization of the air flow in the cooling air passage.
  • the air guide elements is thus achieved a broadening and / or homogenization of the air in the cooling air passage with respect to the situation without the use of the air guide elements or.
  • the air flow generated by the fan can thereby cover a larger area of the evaporator or cooled by the evaporator surface or sweep the said surface more evenly than would be the case without the use of one or more air guide elements.
  • the air guide element is designed such that the air flowing through the cooling air duct over the entire width of the evaporator preferably evenly distributed.
  • the evaporator surface is optimally utilized. It is particularly advantageous if the air flows over the evaporator uniformly, ie, via the evaporator flows per unit area of the evaporator approximately the same amount of air per unit time.
  • the air guide element may be designed in the form of one or more elevations which extend into the cooling air channel.
  • the elevations are located on one or both opposite walls of the cooling air channel and / or an element located in the cooling air channel, such as, for example, on an evaporator or elsewhere in a region within the cooling air channel.
  • the air flow is influenced in such a way that broadening and / or equalization of the air flow takes place in at least one section of the cooling air channel, whereby an improved flow of the evaporator and thus better utilization of the evaporator's cooling capacity takes place.
  • the cooling air duct is located in the cooled interior or in fluid communication therewith.
  • the air guide element may be located on a wall, preferably on the rear wall of the inner container delimiting the cooled inner space, and / or on a partition wall which is arranged at a distance from the wall or rear wall.
  • the partition can basically be formed as a plate. This can extend over the entire width of the interior. It is also conceivable to arrange the air guide element, for example, to an evaporator, which is located in the cooling air passage, or at another point in the space between said wall of the inner container and the partition wall.
  • the air guide element may be an integral part of the wall of the inner container bounding the cooled inner space and / or a partition plate arranged at a distance therefrom and / or an element located therebetween, such as an evaporator. It is also conceivable that the air guide element is designed as an additional part, that is not as an integral part of the cooling air duct forming element or an element located therein.
  • the integral arrangement has the advantage that a particularly simple assembly is possible because it can be dispensed with an assembly of the air guide element.
  • the design of the air guide element as an additional part has the advantage that it can be changed in position if necessary, if necessary.
  • the survey is designed such that the limited by the survey gap across the width of the device or evaporator has no constant width, but a varying width and / or that the distance of the survey to a the elevation opposite element, in particular to a cooling air channel limiting partition wall or to the wall of the inner container over the width of the device or the evaporator is not constant, but changeable. Due to this varying distance of the survey to an adjacent element results in the survey a different flow resistance.
  • This flow resistance or gap width is preferably designed so that below the elevation, i. in the direction of flow after the survey there is a uniform distribution and / or broadening of the air flow generated upstream of the survey by the fan.
  • the elevation is designed such that it has the shape of a part of a circle, an ellipse or a teardrop-shaped profile in cross-section, and / or that the elevation is formed such that it in the Top view straight or curved, horizontal or oblique or in the form of a V-profile, which is open at the top or bottom.
  • ribs or projections may be integrated or otherwise associated with the survey that guarantee compliance with the desired distance during assembly of the cooling air channel limiting partition plate, the evaporator or other component.
  • These ribs, projections or other spacers may be integral parts or be designed as additional parts.
  • one or more spacers are provided which ensure a certain distance of the air guide element to at least one further component, in particular a certain distance of the survey according to one of claims 3 to 7 up to a cooling air duct limiting wall or to a in the cooling air duct component.
  • the cooling air duct is delimited by at least one free-hanging evaporator, which forms a wall of the cooling air duct, wherein either no further partition wall is provided, but this is formed by the evaporator, or in addition to the free-hanging evaporator at least one partition or plate is provided so that the air flows on the front side and rear side over the evaporator.
  • partition is thus to be understood generally and includes any preferably flat and / or plate-shaped element which limits the cooling air duct. This may, for example, be a separating plate or even the evaporator itself or a part of the evaporator itself. It is also conceivable that both a partition plate and an evaporator are used, which is designed as a free-hanging evaporator. This evaporator is arranged in the region between the inner container wall and said partition plate.
  • the air guide element may alternatively or in addition to its formation as a survey by one or more fan-like structures are formed, in particular by one or more fan-like elevations on one or both or more walls of the cooling air duct and / or by one or more fan-like structures in the cooling air channel and / or arranged on a component located in the cooling air passage. It is conceivable, for example, to arrange these fan-like structures on the rear wall of the inner container or to integrate them into the rear wall of the inner container. The same applies to the arrangement of the fan-like structures on said partition plate and / or on the evaporator.
  • the fan-like structures are arranged on the separating plate and / or on the inner container and / or on a component arranged in the cooling air duct, such as an evaporator, these are preferably designed such that they at least over one of the air flow generated by the fan Distribute and widen the partial area and preferably over the entire width of the evaporator or a wall adjacent to the evaporator.
  • the evaporator can be freely suspended or foamed.
  • the fan may be an axial, tangential or radial fan.
  • FIG. 1 a With the reference numeral 10, the cooled interior of a refrigerator or freezer, which is enclosed on the one hand by the inner container 20 and on the other hand from the inside of the door 30.
  • the vertically extending partition plate 70 having an upper recess in which the fan 90 is arranged.
  • the fan 90 By means of the fan 90, air is conveyed from the cooled interior 10 into the cooling air passage 50, which constitutes a part of the cooled interior 10.
  • the cooling air channel 50 has a lower outlet opening 52, through which the cooled air flows back into the cooled interior 10.
  • Reference numeral 80 denotes a foamed-in evaporator which extends directly behind the rear wall of the inner container 20. This serves to cool the air conveyed through the cooling air duct 50.
  • FIG. 1b shows a comparable arrangement, which differs from that according to FIG. 1a characterized in that the partition wall 70 is formed by the evaporator 80.
  • the component "evaporator” coincides with the component "partition”.
  • FIGS. 1 a and 1b marked configurations are known per se from the prior art.
  • FIGS. 1a and 1b surveys not shown in detail, which cause the gap width "B" of the cooling air passage 50 to be changed.
  • gap width is from the FIGS. 1 A and 1b apparent width of the cooling air duct understood, ie from the perspective of standing in front of the device user is the depth of the cooling air duct.
  • This at least one survey now leads to the fact that the cooling air duct is made narrow at the location of the survey, as is the case Figure 1d is apparent.
  • a survey 100 is provided, which is located in the in Figure 1d illustrated example in the rear region of the inner container 20 extends. It may be formed as an additional part or as an integral part of the inner container rear wall.
  • This survey 20 now leads to the fact that the gap width B ', that is, the air gap between the elevation 20 and the partition wall 70 is less than in the known from the prior art designs.
  • the distance or the gap width B ' is not constant over the entire device width, but variable.
  • the gap width B 'in the edge regions of the device, ie in the areas of the side walls is greater than in a central region in which the fan 90 is arranged.
  • a preferred embodiment of the invention is thus that a foamed or free-hanging evaporator is provided and at least one partition plate, in which a fan is integrated in the upper region. This can also be mounted on the device ceiling.
  • a survey 100 is integrated, for example, in the upper region, below the integrated fan in the partition plate, which has a defined but variable distance to the partition plate 70 over the device width. Due to the varying distance B 'of this survey 100 to the partition plate 70 results in the survey 100, a different flow resistance, which is designed so that below the survey uniform distribution of the above the survey 100 generated by the fan 90 air flow occurs.
  • the elevation can extend over the entire width of the interior space 20 or only over a partial area.
  • both an evaporator 80 and beyond a partition 70 is provided.
  • the partition 70 is upstream of the evaporator 80, that is, from the perspective of a person looking into the device, the evaporator 80 is behind the partition plate 70.
  • the evaporator 80 is freely suspended in the cooling air duct 50 and is on its front side and on its back flows through the air conveyed by the fan 90, as does this Figure 1c evident.
  • Numeral 110 in FIG Figure 1d spacers are characterized, which ensure that the partition plate 70 has a predetermined distance to the facing this edge region of the survey 100. In this way, a certain distance between the partition plate 70 and the edge area facing the elevation 100 can be maintained.
  • the shape of the survey 100 can be configured differently. It can have the shape of a partial circle in cross section ( FIG. 2a ), the shape of an ellipse or partial ellipse ( FIG. 2b ), a drop shape according to Figure 2c , Like this Figure 2d shows, the same applies to the partition plate 70 with the survey 100 '.
  • the elevation 100 may be located on the rear wall of the inner container 20 and / or on the partition plate 80. she can be an integral part of these components.
  • the embodiment according to Figure 2d shows two elevations 100, 100 ', one of which is arranged on the rear wall 60 of the inner container 20 and one on the partition plate 70. Between these remains an air gap of the cooling air duct, whose exemplary in Figure 2c shown width B 'is less than before or after the surveys 100th
  • FIGS. 3a to 3c shows the plan views of the rear walls of the inner container 20
  • the survey may be carried out horizontally, ie horizontally ( FIG. 3a ) or in the form of a downwardly open V-profile ( FIG. 3b ) or finally in the form of an upwardly open V-profile ( Figure 3c ).
  • FIGS. 5a and 5b show further embodiments.
  • the integral or as an additional part survey 100 which contacts the spacer 110, which in turn forms an integral part or additional part of the partition plate 70.
  • FIG. 4 shows a further embodiment of the present invention.
  • the air distribution is not over one or more surveys according to Figure 1d achieved, but over a fan-like structure 120, which may be arranged for example on the inner container 20.
  • the present invention thus also relates to the design of a refrigerator and / or freezer, for example, with a foamed or free-hanging evaporator and at least one partition plate in which, for example, in the upper part of a fan is integrated or in which the fan is mounted on the device ceiling.
  • fan-shaped elevations 120 may extend as shown FIG. 4 is apparent. These can be integrated, for example, in the rear wall 60 of the inner container 20 or placed on this.
  • These fan-shaped elevations 120 preferably distribute the air flow generated by the fan 90 over the entire width of the evaporator 80.
  • the aforementioned elevations or structures 100, 120 may also be arranged at any other point of the inner container 20 or alternatively or additionally on at least one further component of the device, instead of on the rear wall 60 of the inner container 20. It is conceivable, for example, to arrange the at least one survey on the partition plate 70 or both on the rear wall or other wall of the inner container 20 and also on the partition plate 70. Such an embodiment of the invention is for example in Figure 2d shown.
  • the fan used can be designed, for example, as an axial, radial or tangential fan.
  • the optimized air flow at the evaporator is achieved that a larger evaporator surface and preferably the entire surface is covered by air, with the result that the cooling capacity of the evaporator is better utilized than in a punctual or strip-like flow over the evaporator.
  • the evaporator temperature can be raised, with the result that the power consumption of the device decreases.
  • the present invention provides a simple and inexpensive way to optimize the flow of the evaporator and reduce the operating costs of the device due to the improved efficiency.
  • the simple and integrated design and the small number of components in the manufacture of the fan system and the entire refrigerator and / or freezer can labor and material costs can be saved.

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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)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
EP12006289A 2011-09-12 2012-09-06 Appareil de réfrigération et/ou de congélation Withdrawn EP2568238A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011113211A DE102011113211A1 (de) 2011-09-12 2011-09-12 Kühl- und/oder Gefriergerät

Publications (1)

Publication Number Publication Date
EP2568238A2 true EP2568238A2 (fr) 2013-03-13

Family

ID=46845566

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12006289A Withdrawn EP2568238A2 (fr) 2011-09-12 2012-09-06 Appareil de réfrigération et/ou de congélation

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EP (1) EP2568238A2 (fr)
DE (1) DE102011113211A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112781401A (zh) * 2019-11-06 2021-05-11 广东美的白色家电技术创新中心有限公司 换热装置风道组件及制冷设备

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JPH10141832A (ja) * 1996-11-08 1998-05-29 Fujitsu General Ltd 電気冷蔵庫
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112781401A (zh) * 2019-11-06 2021-05-11 广东美的白色家电技术创新中心有限公司 换热装置风道组件及制冷设备
CN112781401B (zh) * 2019-11-06 2023-07-25 广东美的白色家电技术创新中心有限公司 换热装置风道组件及制冷设备

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