EP2556319B1 - Échangeur de chaleur tubulaire métallique, son procédé de fabrication et appareil de réfrigération utilisant celui-ci - Google Patents

Échangeur de chaleur tubulaire métallique, son procédé de fabrication et appareil de réfrigération utilisant celui-ci Download PDF

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Publication number
EP2556319B1
EP2556319B1 EP11712238.2A EP11712238A EP2556319B1 EP 2556319 B1 EP2556319 B1 EP 2556319B1 EP 11712238 A EP11712238 A EP 11712238A EP 2556319 B1 EP2556319 B1 EP 2556319B1
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EP
European Patent Office
Prior art keywords
heat exchanger
bitumen
wires
tube heat
wire tube
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.)
Active
Application number
EP11712238.2A
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German (de)
English (en)
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EP2556319A2 (fr
Inventor
Detlef Cieslik
Berthold Pflomm
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.)
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Publication of EP2556319A2 publication Critical patent/EP2556319A2/fr
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Publication of EP2556319B1 publication Critical patent/EP2556319B1/fr
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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
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/122—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and being formed of wires
    • 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
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/04—Condensers
    • 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
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D2020/0004—Particular heat storage apparatus

Definitions

  • the present invention relates to a wire tube heat exchanger, in particular for a household refrigerating appliance, with two layers of wires and a refrigerant pipe extending into a gap between the layers.
  • a heat exchanger of this type in which, in the intermediate space between the two layers, moreover, between each two parallel sections of the refrigerant pipe, bags are filled, which are filled with a thermal energy storage medium.
  • the thermal ballast these bags present prolongs the running times and down times of a compressor that pumps the refrigerant through the refrigerant line.
  • non-rigid bags to accommodate the energy storage medium has the advantage that a close thermal contact between the wires and / or the refrigerant line on the one hand and the energy storage medium on the other hand can be ensured, but there is a high risk of leakage of the bag inappropriate treatment.
  • the bags are well suited for a horizontally mounted heat exchanger such as an evaporator between two compartments of a freezer, in the vertical installation position typical of a condenser there is a risk of the bags collapsing in a lower portion of the heat exchanger thereby limiting their effectiveness is.
  • Out GB 1 110 041 A is a cooling device has become known in which an evaporator to increase the cooling storage capacity is surrounded by a sand-bitumen mass.
  • An object of the invention is to provide a heat exchanger which guarantees efficient heat exchange between a heat transfer medium and an energy storage medium regardless of the installation position of the heat exchanger and is easy to manufacture.
  • bitumen can be made easily plasticized by heating, so that it is able to snugly adhere to any contour of the wires or the refrigerant tube of the wire tube heat exchanger and an intense heat exchange between the wires or the Refrigerant pipe on the one hand and the bitumen on the other hand is possible.
  • the bitumen is fixed, so that unlike a liquid-filled bag is no danger that the bitumen leaves its installation.
  • At least a first of the two layers of wires is predominantly, i. on a majority of the length of the wires and / or on a majority of their circumference, embedded in the bitumen.
  • bitumen In order not to interfere with the heat exchange with the environment, the bitumen should have a large exposed surface. Therefore, it is useful for the effectiveness of the heat exchanger, when the embedded wires of the first layer are visible on a surface of the bitumen.
  • the surface of the bitumen advantageously has ribs in which the wires of the first layer run.
  • the projection of the ribs over adjacent areas of the surface, in particular over each extending between the ribs grooves should correspond at least to the diameter of the wires.
  • the gap is filled with bitumen all over.
  • bituminous layer In order to protect the bituminous layer from damage, it is advantageous if the bitumen does not project beyond the wires of the second layer.
  • the amount of bitumen used is preferably so large that the bitumen touches the wires of the second layer.
  • An edge region of the plate-shaped wire tube heat exchanger can expediently be kept free of bitumen, likewise in order to reduce the risk of damage to the bituminous layer.
  • This edge region may, in particular, comprise marginal wires of the first and second layers and / or the respective outermost of a plurality of parallel sections of the refrigerant tube.
  • the invention also provides a refrigeration appliance, in particular a domestic refrigeration appliance, in which a wire tube heat exchanger of the type described above is mounted on an outer surface of the body as a condenser.
  • the wire tube heat exchanger is expediently mounted on the carcass such that the second layer of the wire tube heat exchanger faces away from the carcass.
  • the bitumen layer even if it is exposed on the opposite, the body facing surface of the heat exchanger, protected in the installed state against damage.
  • the partial pressing of the bitumen results in an embedding of the wires of the first layer in the bitumen layer and thus a secure anchoring of the bitumen on the heat exchanger.
  • a temperature range between 70 and 90 ° C. It has been found that in this temperature range a firm adhesion of the bitumen to the wires of the first layer can be achieved without the additional use of adhesives. Higher temperatures lead to poorer adhesion due to the increasing flowability of the bitumen; lower temperatures require very high pressing forces, which can damage the structure of the wire tube heat exchanger.
  • a flexible cushion in which the wires of the first layer can press .
  • a cushion may in particular consist of silicone.
  • Fig. 1 shows in a perspective view a section of a wire tube heat exchanger 1 of known per se structure, with two mutually parallel layers 2, 3 of wires 2a, 2b, ..., 3a, 3b, ... and one in a gap 4 between the Layers 2, 3 running meandering and firmly connected to the wires of the two layers 2,3 by spot welding refrigerant pipe 5. Above the wire tube heat exchanger, a section of a bitumen 6 is shown.
  • the heat exchanger 1 is as in Fig. 2 shown in cross section, placed in a mold 10, wherein outer sheets 11 of the refrigerant pipe 5 and optionally these adjacent marginal wires 2a, 3a of the layers 2, 3 between parts 12, 13 of the mold 10 are sealed.
  • the edge lengths of a central clearance of the mold 10 correspond to those of the punch 7.
  • the width of the bitumen film 6 also corresponds to the width of the cavity.
  • the length of the bitumen film 6 may be smaller than that of the cavity and the heat exchanger 1, so that two rectilinear portions 18 of the refrigerant pipe 5 are not covered by the film 6 at opposite edges of the substantially rectangular heat exchanger 1.
  • bituminous film 6 is heated in the mold 10 to a temperature of about 80 ° C. At this temperature, the bitumen is plastic and penetrates under the pressure of the punch 7 through gaps between the wires of the layer 2 in the space 4 a.
  • Fig. 3 shows this fact in a to Fig. 1 similar perspective partial view of the heat exchanger 1 and the punch 7 with the omission of the mold 10. Most of the bitumen is displaced into the space 4 inside; wherein the streams of material which have passed through a wire 2b, 2c, ... on its opposite sides, are again fused together on the downstream side of the wire, so that only a narrow groove 14 in the flow shadow of the wire at one of the layer 3 adjacent surface of the bitumen 6 appears.
  • bitumen over a gap between two wires of the layer 2 is more compliant than immediately above these wires, are pressed into the bitumen-contacting surface of the pad 9 respectively at the location of the wires 2a, 2b, ... and the refrigerant tube 5 grooves. Therefore, on the side of the wires 2 facing the punch 7, the bitumen is not completely displaced, but a thin layer of bitumen remains between the wires 2b, 2c ... and the punch 7, so that the wires 2b, 2c, .. are embedded in the bitumen of the film 6 over their entire circumference. Thus, later, after cooling, a firm anchoring of the bitumen at the heat exchanger 1 results.
  • the stamp 7 facing surface of the bitumen 6 gets a strong contouring by pressing; which is quite desirable for intensifying the heat exchange with the environment.
  • the strength of the contouring can be influenced by pressing pressure, pressing temperature and compliance of the pad 9; Preferably, it is set so that the tips of forming in the surface of the bitumen, surrounding the wires 2 ribs 15 by at least the diameter of the wires 2 over each lying between the ribs 15 recesses 16 survive.
  • bitumen foils 6, as in FIG Fig. 4 placed on two sides of a wire tube heat exchanger 1 and pressed against each other under heating, whereby the in Fig. 5 obtained in section evaporator structure is obtained.
  • the wires of both layers 2, 3 of the heat exchanger 1 are embedded in the bitumen substantially over their entire circumference, and in the intermediate space 4 between the layers 2, 3 the bitumen foils 6 pressed into the intermediate space from both sides are fused together. Due to the fusion of the films 6, the bitumen is firmly anchored even when the wires 2b, 2c, ..., 3b, 3c, ...
  • Fig. 6 shows a perspective view of a household refrigerator, which with a according to the with reference to FIGS. 1 to 3 shown method is provided as a condenser wire tube heat exchanger.
  • the heat exchanger 20 is on a rear wall of a body 17 of the refrigerator mounted.
  • the refrigerant pipe 5 comprises a plurality of parallel, horizontally guided pipe sections 18 which are connected in series by arcs 11.
  • the bituminous film 6 is pressed from the rear wall of the body 17 facing side into the heat exchanger 20.
  • the edge length of the film 6 is so dimensioned that of the pipe sections 18 each of the uppermost and the lowest, denoted by 18a, is not touched by the bitumen.
  • the remaining pipe sections 18 are encased in a large part of their circumference of the bitumen and accordingly shown in the figure only as dashed lines.
  • the wires of the body 17 facing the layer 2 are in Fig. 6 not shown; they are completely embedded in the bitumen with the exception of the wires 2a at the right and left edges of the evaporator and their ends attached to the outer pipe sections 18 '.
  • the thickness of the bituminous film 6 is dimensioned such that the film 6 just does not penetrate into the gaps between the wires 3a, 3b, 3c,... Of the layer 3 facing away from the body 17 in the fully deformed state.
  • These wires 3a, 3b, 3c, ... remain freely visible and are accordingly shown in the figure as solid lines.
  • the bitumen in the finished refrigerator is protected on the one hand by the wires facing away from the body 17 layer 3 and at its edges by the marginal wires 2a, 3a of the layers 2 and 3 and the outer pipe sections 18a from damage.
  • the body 17 facing the surface of the heat exchanger is largely free of sharp corners and edges, where dust can get stuck by the bitumen layer exposed there. Since the bitumen largely fills the intermediate space 4, hardly any dust can settle on the heat exchanger 1 even from the side facing away from the body.
  • the bituminous layer therefore not only forms a thermal ballast, which allows to improve the efficiency of the device by extending the compressor operating phases, but it also limits the formation of a dust layer insulating the heat exchanger 1 and thus impairing the efficiency in the course of operation.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (14)

  1. Echangeur de chaleur à tubes métalliques, notamment pour un appareil frigorifique à usage domestique, comprenant deux couches (2 ; 3) de fils métalliques (2a, 2b, ... , 3a, 3b, ...) et un tube de réfrigérant (5) s'étendant dans un espace intermédiaire (4) entre les couches (2 ; 3), caractérisé en ce que l'espace intermédiaire (4) est rempli au moins en partie avec du bitume (6) du fait qu'une feuille de bitume (6) est pressée, au moins sur une partie, à travers des interstices entre les fils métalliques (2a, 2b, ...) de la première couche (2).
  2. Echangeur de chaleur à tubes métalliques selon la revendication 1, caractérisé en ce qu'au moins la première (2) des deux couches (2 ; 3) est enrobée en majeure partie dans le bitume (6).
  3. Echangeur de chaleur à tubes métalliques selon la revendication 2, caractérisé en ce que les fils métalliques enrobés (2b, 2c, ...) de la première couche (2) se dessinent (14 ; 15) sur une surface du bitume.
  4. Echangeur de chaleur à tubes métalliques selon la revendication 3, caractérisé en ce que la surface du bitume (6) présente des nervures (15) dans lesquelles s'étendent les fils métalliques (2b, 2c, ...), et en ce que le débordement des nervures (15) sur des zones voisines (16) de la surface correspond au moins au diamètre des fils métalliques (2b, 2c).
  5. Echangeur de chaleur à tubes métalliques selon l'une quelconque des revendications précédentes, caractérisé en ce que l'espace intermédiaire (4) est rempli de bitume (6) sur toute sa surface sur une majeure partie de la surface de l'échange de chaleur à tubes métalliques en forme de plaque.
  6. Echangeur de chaleur à tubes métalliques selon l'une quelconque des revendications précédentes, caractérisé en ce que le bitume (6) ne déborde pas au-delà des fils métalliques (3a, 3b, ...) de la deuxième couche (3).
  7. Echangeur de chaleur à tubes métalliques selon l'une quelconque des revendications précédentes, caractérisé en ce que le bitume (6) est en contact avec les fils métalliques de la deuxième couche.
  8. Echangeur de chaleur à tubes métalliques selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une zone de bord de l'échangeur de chaleur à tubes métalliques en forme de plaque est exempte de bitume.
  9. Echangeur de chaleur à tubes métalliques selon la revendication 8, caractérisé en ce que la zone de bord comprend des fils métalliques de bordure (2a ; 3a) de la première et de la deuxième couches (2 ; 3) et/ou les sections respectivement situées les plus à l'extérieur (18a) de plusieurs sections parallèles (18) du tube de réfrigérant (5).
  10. Appareil frigorifique, notamment appareil frigorifique à usage domestique, comprenant un corps (17) et un échangeur de chaleur à tubes métalliques (20) monté sur une surface extérieur du corps, selon l'une quelconque des revendications précédentes.
  11. Appareil frigorifique selon la revendication 10, caractérisé en ce que l'échangeur de chaleur à tubes métalliques (20) est un échangeur de chaleur à tubes métalliques selon la revendication 6 et en ce que la deuxième couche (3) de l'échangeur de chaleur à tubes métalliques (20) est opposée au corps (17).
  12. Procédé de fabrication d'un échangeur de chaleur à tubes métalliques (20) comprenant les étapes :
    a) fixation d'un tube de réfrigérant (5) entre deux couches (2 ; 3) de fils métalliques (2a, 2b, ... ; 3a, 3b, ...) ;
    b) positionnement d'une feuille de bitume (6) sur un côté extérieur au moins de la première couche (2) de fils métalliques (2a, 2b, ...) ;
    c) pression à travers au moins une partie de la feuille de bitume (6) à travers des interstices entre les fils métalliques (2a, 2b, ...) de la première couche (2).
  13. Procédé selon la revendication 12, caractérisé en ce que la pression est réalisée à une température comprise entre 70 et 90°C.
  14. Procédé selon la revendication 12 ou 13, caractérisé en ce que pour presser, on utilise un coussin souple (9), notamment en silicone.
EP11712238.2A 2010-04-09 2011-03-30 Échangeur de chaleur tubulaire métallique, son procédé de fabrication et appareil de réfrigération utilisant celui-ci Active EP2556319B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010003825 DE102010003825A1 (de) 2010-04-09 2010-04-09 Drahtrohrwärmetauscher, Verfahren zu dessen Herstellung und diesen verwendendes Kältegerät
PCT/EP2011/054893 WO2011124511A2 (fr) 2010-04-09 2011-03-30 Échangeur de chaleur tubulaire métallique, son procédé de fabrication et appareil de réfrigération utilisant celui-ci

Publications (2)

Publication Number Publication Date
EP2556319A2 EP2556319A2 (fr) 2013-02-13
EP2556319B1 true EP2556319B1 (fr) 2014-03-05

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EP11712238.2A Active EP2556319B1 (fr) 2010-04-09 2011-03-30 Échangeur de chaleur tubulaire métallique, son procédé de fabrication et appareil de réfrigération utilisant celui-ci

Country Status (6)

Country Link
EP (1) EP2556319B1 (fr)
CN (1) CN103403482B (fr)
DE (1) DE102010003825A1 (fr)
ES (1) ES2452521T3 (fr)
RU (1) RU2519197C1 (fr)
WO (1) WO2011124511A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102607214A (zh) * 2012-03-21 2012-07-25 合肥美的荣事达电冰箱有限公司 冷凝器及具有它的制冷设备
DE102018212209A1 (de) * 2018-07-23 2020-01-23 BSH Hausgeräte GmbH Einkreis-Kältegerät

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB619444A (en) * 1946-12-10 1949-03-09 Frank Frederick Briginshaw Improvements in and relating to refrigerating and like equipment
GB973994A (en) * 1963-08-01 1964-11-04 Lec Refrigeration Ltd Bottle cooler
GB1110041A (en) * 1964-04-29 1968-04-18 Mieczyslaw Komedera Improvements in or relating to apparatus for chilling liquids
SU1746155A1 (ru) * 1990-07-12 1992-07-07 Челябинский Зональный Научно-Исследовательский И Проектный Институт Типового И Экспериментального Проектирования Жилых И Общественных Зданий Солнцеприемное устройство, совмещенное с кровлей здани
DE19818995A1 (de) * 1998-04-28 1999-11-04 Bsh Bosch Siemens Hausgeraete Kältegerät
DE19948480A1 (de) 1999-10-08 2001-04-12 Bsh Bosch Siemens Hausgeraete Wärmetauscher, wie Verdampfer, Verflüssiger oder dergleichen
DE10218826B4 (de) * 2002-04-26 2007-03-22 BSH Bosch und Siemens Hausgeräte GmbH Wärmetauscher für ein Kältegerät und Verfahren zur Herstellung eines Wärmetauschers
CN1309998C (zh) * 2002-04-26 2007-04-11 Bsh博施及西门子家用器具有限公司 制冷装置用的换热器和制造换热器的方法
CN101089049B (zh) * 2006-06-13 2012-07-25 上海蜜荣科电气数字集成有限责任公司 一种废胎胶粉复合改性沥青及其制备方法
DE102008019387A1 (de) * 2008-04-17 2009-10-22 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät, insbesondere Haushaltskältegerät umfassend einen Verflüssiger mit Wärmespeicherelementen
DE102008041478A1 (de) * 2008-08-22 2010-02-25 BSH Bosch und Siemens Hausgeräte GmbH Geräuschreduziertes Kältegerät

Also Published As

Publication number Publication date
EP2556319A2 (fr) 2013-02-13
WO2011124511A3 (fr) 2012-03-15
RU2519197C1 (ru) 2014-06-10
CN103403482A (zh) 2013-11-20
ES2452521T3 (es) 2014-04-01
DE102010003825A1 (de) 2011-10-13
WO2011124511A2 (fr) 2011-10-13
RU2012144288A (ru) 2014-05-20
CN103403482B (zh) 2015-09-09

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