EP2567167A2 - Appareil frigorifique et évaporateur associé - Google Patents

Appareil frigorifique et évaporateur associé

Info

Publication number
EP2567167A2
EP2567167A2 EP11712574A EP11712574A EP2567167A2 EP 2567167 A2 EP2567167 A2 EP 2567167A2 EP 11712574 A EP11712574 A EP 11712574A EP 11712574 A EP11712574 A EP 11712574A EP 2567167 A2 EP2567167 A2 EP 2567167A2
Authority
EP
European Patent Office
Prior art keywords
tube
graphite
wall
evaporator
evaporator 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
EP11712574A
Other languages
German (de)
English (en)
Other versions
EP2567167B1 (fr
Inventor
Stefan Holzer
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 EP2567167A2 publication Critical patent/EP2567167A2/fr
Application granted granted Critical
Publication of EP2567167B1 publication Critical patent/EP2567167B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/02—Constructions of heat-exchange apparatus characterised by the selection of particular materials of carbon, e.g. graphite
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F28D1/0477—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F28D2021/0071—Evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F2013/005—Thermal joints
    • F28F2013/006—Heat conductive materials

Definitions

  • the present invention relates to a refrigeration device, in particular a domestic refrigerator, and a usable in such a refrigerator evaporator.
  • a refrigeration device in particular a domestic refrigerator
  • a usable in such a refrigerator evaporator conventionally comprises a pipe in which refrigerant circulates, a support plate to which the pipe is fixed and via the one
  • Heat exchange takes place between the tube and an interior of the refrigerator cooled by the evaporator, and a heat spreader layer disposed between the tube and the carrier plate, which provides efficient heat transfer between the carrier plate and the tube.
  • the carrier plate is a freezer compartment trough formed in an inner container of the refrigeration device, around which the tube is wound.
  • metal plates may be disposed between the tube and the freezer tray. If such a metal plate touches the freezer well over a large area, it causes a good
  • a slightly cheaper solution is to glue a 30 micron thick aluminum foil to the outer surfaces of the freezer compartment and wrap and glue the tube around it. If the adhesive layer that fixes the tube to the aluminum foil is thin enough, sufficient thermal conductivity of the evaporator for practical requirements is readily achievable. However, it is precisely this thin adhesive layer that can not be reliably realized everywhere. Fluctuations in the ductility of the tube may cause individual turns of the tube to not conform tightly to the aluminum foil, leaving an air gap therebetween or creating a thick layer of adhesive that significantly impedes heat transfer. Although the aluminum foil is cheaper than a metal plate, but still there is a need for a more cost-effective solution that reliably ensures good heat exchange between the tube and the support plate.
  • Object of the present invention is to provide an evaporator for a refrigerator, which at low cost the conventional evaporator in its thermal
  • the object is achieved by graphite-containing in an evaporator for a refrigerator with a refrigerant-carrying tube, at least one support plate to which the tube is attached, and arranged between the tube and the carrier plate heat spreader layer graphite.
  • the thermal conductivity of graphite is better than that of many metals and only slightly lower than that of aluminum at significantly lower cost. It is therefore sufficient a layer thickness of the graphite, which is only slightly larger than that of the aluminum foil to provide an evaporator whose
  • Heat exchange performance is at least as large as that of a conventional one
  • the graphite content of the heat spreader layer should preferably be at least 100 mg / cm 2 , more preferably at least 200 mg / cm 2 , corresponding in each case to a layer thickness of pure graphite of approximately 50 or 100 ⁇ m.
  • a graphite layer of this thickness can easily reach a heat transfer coefficient of 0.4 Wm "2 K " 1 .
  • the heat spreader layer comprises a sheet of substantially pure graphite.
  • a graphite layer can be considered if any impurities present do not affect the thermal conductivity of the layer.
  • the heat spreader layer may comprise a graphite filled plastic film.
  • a plastic film must be generally thicker than a pure graphite foil to achieve the same thermal conductivity, but has the advantage of more convenient handling.
  • the film may have a macroscopically homogeneous structure with embedded in a plastic matrix graphite particles or a
  • a third embodiment results as a heat distribution layer a graphite-containing plastic plate into consideration.
  • Plastic film such a depression can be easily formed, since such a film will generally be the more compliant, the higher their graphite content.
  • a recess may be formed in advance on the plate to subsequently lay the tube therein.
  • the plastic plate may also have the tube clamping projections that produce a close thermal contact between plastic plate and tube.
  • these projections have mutually opposite concave flanks, in which the tube can be inserted.
  • the projections may conveniently be formed as ribs extending along the tube.
  • the support plate may form a wall of a freezer compartment or a refrigerating compartment in a refrigerator according to the invention.
  • the heat distribution layer may comprise a graphite-containing plastic plate on a first of these walls and a foil on a second wall. Due to the higher in comparison to the film carrying capacity of the plastic plate, the tube can be laid closer to the first wall than at the second.
  • the first wall is a rear wall or a bottom wall of the first wall
  • Freezer In the case of the rear wall, the use of the plastic plate makes sense, because it is not practical here to anchor the tube by wrapping around the freezer. On a bottom wall, a denser installation of the pipe may be desirable in order to provide a high cooling capacity for rapid freezing of stored refrigerated goods.
  • the invention is also applicable to an evaporator, the support plate is arranged freely in an interior of the refrigerator.
  • FIG. 1 shows a schematic cross section through a domestic refrigerator according to a first embodiment of the invention
  • FIG. 2 shows a schematic cross section through a refrigeration device according to a second
  • FIG. 5 shows a wall section of the freezer compartment according to a modified
  • FIG. 6 shows a schematic perspective view of a freezer inner container with an evaporator according to the invention.
  • Fig. 1 shows a section through a combination household refrigeration appliance with a body 1, a normal refrigeration compartment 2, a freezer compartment 3 and doors 4, 5 for closing the two compartments 2, 3.
  • the compartments 2, 3 are in a conventional manner by Plastic deep-drawn inner container delimited by a surrounding insulating material layer 6.
  • the inner containers are each box-shaped with a front side open to the door 4 or 5, a rear wall 7, ceiling floor and side walls 8, 9 and 10 respectively.
  • the insulation material layer 6 facing outer sides of the walls 8, 9, 10 of the freezer compartment Inner container are covered with a graphite or graphite-filled plastic film, which is not visible in Fig. 1 due to their small thickness.
  • the foil may be glued individually piece by piece to each wall 8, 9, 10, or it may be wound in one piece around all four walls 8, 9, 10.
  • a refrigerant pipe 1 1 made of aluminum extends helically over the walls 8, 9, 10 of the inner container in close contact with the film.
  • Fig. 2 shows an alternative embodiment of a refrigeration device according to the invention.
  • an inner container surrounded by an insulating material layer 6 delimits an inner space 12 which is subdivided by a box 13 mounted therein into a freezer compartment (inside the box 13) and a normal refrigerated compartment 2 (outside the box 13).
  • the molded plastic or metal walls of the box 13 are externally covered with a sheet of graphite or graphite-filled plastic, and around the film is helically wrapped a refrigerant pipe 1 1.
  • Fig. 3 shows schematically and not to scale a partial section through the freezer compartment inner container of the refrigerator of FIG. 1 or the box 13 of FIG. 2.
  • the designated here with 14 film Graphite or of graphite-filled plastic extends integrally over the walls 8, 10.
  • the tube 11 is in the vicinity of rounded edges 15 between the walls 8, 10 in the yielding Slide 14 is pressed.
  • the original thickness of the film 14 at these locations is indicated by a dashed line. From this flexibility of the film results in a large-area contact between the film 14 and the tube 1 1 in the vicinity of the edges 15, which in turn provides for a highly efficient heat transfer between the tube 1 1 and the film 14.
  • Fig. 4 shows a section through a part of the ceiling wall 8, on which is clearly visible, as the tube 1 1 has pressed into the film 14.
  • the film 14 In practice, however, it is not a problem to give the film 14 also an at least equivalent heat transfer coefficient. If the film 14 consists of pure graphite, a thickness of 100 to 200 ⁇ m suffices to achieve a heat transfer coefficient of approximately 0.5 ⁇ m 2 K -1 , which corresponds to that of a conventional aluminum foil of 30 ⁇ m thickness. This layer thickness corresponds to a graphite amount of about 100 to 200 mg / cm 2 , and it is to be assumed that a corresponding amount of graphite will also be sufficient in a graphite-filled film in order to achieve a heat transfer coefficient of the same level.
  • a plastic plate 16 whose thermal conductivity is increased by the addition of graphite. While the amount of graphite that can be added to most plastics without losing their strength is limited, the thermal conductivity of plastic sheet 16 will generally be significantly less than that of pure graphite. However, this disadvantage is of little importance, since suitable plastics are available inexpensively, so that sufficient for practical purposes heat transfer coefficient of at least 0.4 watts per square meter Kelvin can be achieved, in which the thickness of the plastic plate 16 is chosen sufficiently large. In practice, a thickness of the plate 16 of 1 to 2 mm is sufficient to accommodate the required amount of graphite from about 100 to 200 mg / cm 2 .
  • projections may be formed, for example, as hooks which press the tube against the plate; preferred is the embodiment shown in Fig. 5, in which the projections 17 are formed as elongated ribs, each pairwise define a groove in which the tube 1 1 is clamped.
  • the rib-shaped projections 17 of FIG. 5 facing concave flanks 18 whose radius of curvature corresponds to the outer radius of the tube 1 1, so that the flanks 18 and the tube 1 1 to more than half of the pipe circumference.
  • Fig. 6 shows in a perspective view obliquely from below a freezer compartment inner container according to a further development of the present invention.
  • Ceiling bottom and side walls 8, 9, 10 of the inner container are, as described with reference to FIGS. 1 to 3, coated with a graphite-containing film 14, and drawn in Fig. 6 in dashed lines section 19 of the refrigerant raw r 1 1 1 pulls is in contact with the film 14 helically around the walls 8, 9, 10.
  • the tube 1 1 can not be secured as in the case of the section 19 by sloshing around, here is a plate 16 with reference to 5 and a meandering over the plate 16 extending portion 20 of the tube 1 1 is respectively clamped between the plate 16 protruding projections 17.
  • the freezer can be cooled from five sides at the same time; Heat can only penetrate through its open front.
  • such an increased laying density on a single wall is wrapped with the helically around the walls 8, 9, 10
  • Pipe section 19 not realizable.
  • a second plate 21 of graphite-containing plastic is attached here: it can be glued to the film 14, or the film 14 is recessed in the area occupied by the plate 21.
  • a segment 22 of the around the walls 8, 9, 10 wound pipe section 19 extends over the plastic plate 21 in the longitudinal direction.
  • pairs of projections 17 are formed, which clamp between them to the tube segment 21 parallel tube segments 23, 24.
  • These pipe segments 23, 24 are connected to each other and to one end of the pipe section 19 via arches 25, 26.
  • a along an edge 15 between the bottom and side walls 9, 10 extending pipe section 27 establishes a connection to the extending over the rear wall 7 pipe.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne un évaporateur pour un appareil frigorifique, comprenant un tube (11) guidant un fluide frigorigène, au moins une plaque de support (7, 8, 9, 10) sur laquelle est fixé le tube (11), et une couche de dissipation de chaleur (14, 16, 21) contenant du graphite, disposée entre le tube (11) et la plaque de support (7, 8, 9, 10).
EP11712574.0A 2010-05-04 2011-04-07 Appareil frigorifique et évaporateur associé Not-in-force EP2567167B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010028527A DE102010028527A1 (de) 2010-05-04 2010-05-04 Kältegerät und Verdampfer dafür
PCT/EP2011/055404 WO2011138117A2 (fr) 2010-05-04 2011-04-07 Appareil frigorifique et évaporateur associé

Publications (2)

Publication Number Publication Date
EP2567167A2 true EP2567167A2 (fr) 2013-03-13
EP2567167B1 EP2567167B1 (fr) 2014-03-05

Family

ID=44625709

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11712574.0A Not-in-force EP2567167B1 (fr) 2010-05-04 2011-04-07 Appareil frigorifique et évaporateur associé

Country Status (5)

Country Link
EP (1) EP2567167B1 (fr)
CN (1) CN102869941B (fr)
DE (1) DE102010028527A1 (fr)
RU (1) RU2528799C2 (fr)
WO (1) WO2011138117A2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011100192A1 (de) * 2011-05-02 2012-11-08 Liebherr-Hausgeräte Ochsenhausen GmbH Wärmeübertrager und Kühl- und/oder Gefriergerät mit einem Wärmeübertrager
DE202012103540U1 (de) * 2012-09-17 2013-12-20 Uponor Innovation Ab Wärmeleitplatte, insbesondere zum Kühlen oder Heizen eines Gebäudes
WO2014086860A1 (fr) * 2012-12-05 2014-06-12 Arcelik Anonim Sirketi Dispositif de refroidissement comprenant un évaporateur
EP2829828B1 (fr) 2013-07-25 2016-06-29 Electrolux Appliances Aktiebolag Procédé de fabrication d'un appareil de réfrigération
DE102014011672A1 (de) * 2013-11-04 2015-05-07 Liebherr-Hausgeräte Lienz Gmbh Kühl- und/oder Gefriergerät
DE102014210679A1 (de) 2014-06-05 2015-12-17 BSH Hausgeräte GmbH Kältegerät mit einem Verdampfer
CN106839573A (zh) * 2017-01-22 2017-06-13 合肥华凌股份有限公司 冰箱

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DE1601053A1 (de) * 1967-11-14 1970-08-20 Bauknecht Gmbh G Kuehleinrichtung
SU1198360A1 (ru) * 1983-07-05 1985-12-15 Гнединцевский Газоперерабатывающий Завод Горизонтальный теплообменник-испаритель погружного типа
CN1087824C (zh) * 1998-02-12 2002-07-17 中国科学院低温技术实验中心 蓄热式不间断工作冷凝器
US6536227B1 (en) * 2002-01-29 2003-03-25 Daewoo Electronics Corporation Direct cooling type refrigerator
US20070053168A1 (en) * 2004-01-21 2007-03-08 General Electric Company Advanced heat sinks and thermal spreaders
DE202005000909U1 (de) 2004-12-28 2006-05-04 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und Gefriergerät
CN101048055A (zh) * 2006-03-30 2007-10-03 通用电气公司 先进的受热器和散热器
DE202006010757U1 (de) * 2006-07-11 2006-11-02 Sgl Carbon Ag Kühlvorrichtung
CN201306966Y (zh) * 2008-11-14 2009-09-09 河南新科隆电器有限公司 一种粘接式板管蒸发器

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See references of WO2011138117A3 *

Also Published As

Publication number Publication date
WO2011138117A2 (fr) 2011-11-10
CN102869941A (zh) 2013-01-09
EP2567167B1 (fr) 2014-03-05
RU2528799C2 (ru) 2014-09-20
CN102869941B (zh) 2015-09-30
DE102010028527A1 (de) 2011-11-10
WO2011138117A3 (fr) 2012-02-23
RU2012147335A (ru) 2014-06-10

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