EP2638337B1 - Évaporateur - Google Patents

Évaporateur Download PDF

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Publication number
EP2638337B1
EP2638337B1 EP11775804.5A EP11775804A EP2638337B1 EP 2638337 B1 EP2638337 B1 EP 2638337B1 EP 11775804 A EP11775804 A EP 11775804A EP 2638337 B1 EP2638337 B1 EP 2638337B1
Authority
EP
European Patent Office
Prior art keywords
pipe
evaporator
defrost heater
radial direction
heater
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.)
Not-in-force
Application number
EP11775804.5A
Other languages
German (de)
English (en)
Other versions
EP2638337A2 (fr
Inventor
Renate Pradel
Daniel Radziwolek
Birtan Sert
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 EP2638337A2 publication Critical patent/EP2638337A2/fr
Application granted granted Critical
Publication of EP2638337B1 publication Critical patent/EP2638337B1/fr
Not-in-force 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • 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
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06—Removing frost
    • F25D21/08—Removing frost by electric heating
    • 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
    • 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
    • F28F1/24—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 extending transversely
    • F28F1/32—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 extending transversely the means having portions engaging further tubular elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F17/00—Removing ice or water from heat-exchange apparatus
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/01—Heaters
    • 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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
    • F28F9/0131—Auxiliary supports for elements for tubes or tube-assemblies formed by plates

Definitions

  • the invention relates to an evaporator for a refrigeration appliance, in particular a domestic refrigeration appliance, with a pipe through which a refrigerant can flow with an inlet and an outlet opening, wherein the tube has U-shaped deflections with legs of pipe sections running parallel to each other and straight and wherein the pipe is in Passage openings of fins is stored.
  • refrigerators and freezers often include an evaporator for expanding the cooling medium and for cooling a cold room.
  • This evaporator tends to icing.
  • no-frost devices localized supply of energy to the icing-prone areas of the evaporator causes defrosting of the ice without bringing the entire refrigerator to defrost temperature.
  • a corresponding defrosting device is off DE 11 2004 002 258 T5 in which a defrosting heater is inserted into a through hole of the fins of the evaporator.
  • DE 31 45 445 shows another defrost heater in contact with the heat exchange fins.
  • the layout DE 10 00836 shows an evaporator comprising a cooling coil around which a heating cable is wound and is considered as the closest prior art over the subject of claim 1.
  • the publication WO 2008/001526 A1 shows an evaporator with a fin element.
  • the fin element has slots for a heater.
  • the patent US 3,285,334 shows a heat exchanger comprising lamellar elements.
  • the lamellar elements have notches in which a tube is clamped.
  • the publication WO 2007/045677 A1 shows an evaporator with a tube and fins. Furthermore, a resistance element is provided, which runs parallel to the tube.
  • a disadvantage of the known solutions is first the attachment of the heater to the evaporator, since there is a certain distance in known solutions. Also, the evaporator in the manufacturing process should be easy and inexpensive to produce and the heater should be easily removed in case of service.
  • an evaporator for a refrigerator having a refrigerant-flowable tube with an inlet and an outlet opening according to independent claim 1.
  • the defrost heater can be removed and / or mounted on one of the sides of the deflections of the evaporator. It can be easily assembled in the production process and is easy to remove even for service purposes.
  • the defrost heating has at least one U-shaped deflection, which is associated with a U-shaped deflection of the tube and the defrost heater extends along a leg of the tube in a first radial direction of the tube and along the other leg of the tube in a second radial Direction of the pipe.
  • the second radial direction differs by at least 90 ° from the first radial direction.
  • the second radial direction differs from the first radial direction by 180 °. Since the portions of the pipe heater are on respective opposite sides of the cooling tube, the guidance of the tube is improved in the passage openings. In addition, in the event that the defrost heater is above and below the pipe, condensate drain better than if it were adjacent to (horizontally) the pipe.
  • the defrost heater has meandering a plurality of U-shaped baffles associated with U-shaped baffles of the tube, and the defrost heater extends along the straight legs in different radial directions of the tube and the radial directions are at respective adjacent legs of the tube differently. This will be the leadership of Tube in the passage openings in total, so over several periods of the deflections out, improved.
  • the defrost heater is an electrical resistance heater, as this can be produced and installed at low cost and space-saving.
  • the defrost heater meandering on a plurality of U-shaped turns, which are all in one plane. This does not exclude that further turns may not lie in this plane.
  • the defrost heater is a flat assembly that can be stacked well in the manufacturing process. Since the defrost heater does not have a very high flexural rigidity, it is advantageous that it does not have an excessively complex shape.
  • An appropriate refrigerator and / or freezer includes an evaporator and a controller or controller for activating the defrost heater and thus for defrosting the evaporator. So a no-frost cooling unit is provided and for de-icing, the entire unit does not have to be heated to temperatures above zero degrees.
  • Fig. 1 shows an evaporator, as used, for example, in a compressor refrigerator.
  • a refrigerant is compressed by a compressor, whereby it is heated. This heat is released via a capacitor to the environment.
  • the (liquid) coolant is passed to reduce the pressure via a throttle and relaxed in this way.
  • the refrigerant evaporates and there is evaporation cold, which is discharged via an evaporator to a surrounding medium.
  • This ambient medium is usually the air in the space to be cooled, which is passed either by the convection principle or fan assisted by the evaporator.
  • the refrigerant is supplied to the compressor again, whereby the refrigerant circuit is closed.
  • the current of the ambient medium is shown with the arrows K.
  • the evaporator is in the present case designed as a tube evaporator.
  • a tube with an inlet opening 5 and an outlet opening 7 is used.
  • This tube 2 has a plurality of turns or U-shaped deflections.
  • each U-shaped deflection comprises two legs 10 and 10 ', which are designed as straight and parallel pipe sections and at the base there is a deflecting element 12.
  • This deflecting element can be formed in the simplest case by bending the tube. Alternatively, a separate semicircular curved element with the legs 10 and 10 'connected and in particular soldered be. Since both ends of the legs are deflected in a U-shape, the result is a kind of position of adjacent parallel legs.
  • the legs are not in a plane, but every other leg is an amount of almost twice the pipe diameter corresponds to the top - ie according to Fig. 2 in z-direction - offset. Two of these layers are superimposed so that the outlet opening 7 of the inlet opening 5 is adjacent.
  • lamellae 20 are provided with passage openings 25 and 30.
  • the already correspondingly bent tube 2 is moved by a movement in the y-direction against the slats.
  • the lamellae have the task in use of the evaporator to keep the bent tube 2 in its desired position and thus to give the evaporator mechanical stability against shock or vibration.
  • the lamellae are directly in contact with the tube, so that a good heat exchange is possible and so serve the cooled surfaces of the lamellae cooling the air to be cooled. In principle, for reasons of strength, one blade at a time is sufficient for both areas of the deflections.
  • FIG. 4 In the slats 20 according to Fig. 4 Upper passage opening 25 are used, whose size is dimensioned so that a U-shaped deflection of the pipe can be inserted through it.
  • the lower passage openings 30 also include areas for the passage of U-shaped deflections, but are extended in different directions, so that through these passage openings 30 in addition, the defrost heater can be introduced. So that's how it turns out Fig. 3 gives the region 54 of the defrost heater 50 above (in the z-direction) of the associated pipe section 10 and the portion 54 'of the defrost heater 50 below the pipe section 10'.
  • the passage openings 25 and 30 are each circumferentially closed.
  • FIGS. 5 to 7 show different variants in which the defrost heater can abut a corresponding U-shaped deflection of the pipe.
  • the figures are shown from a viewing angle in the y-direction in the evaporator body, wherein the two larger circles represent sections through the tube and the smaller interconnected circles is a section through the defrost heater.
  • Fig. 6 stands for the installation situation according to the main embodiment and is rotated by about 30 ° and in this case the defrost heater is in different directions to the rectilinear pipe sections 10 and 10 'at.
  • a variant of a passage opening could be rectangular, so that, according to Fig. 5 , the pipe heater is in each case on the same side of the tube.
  • Fig. 6 The execution of Fig. 6 is advantageous in a production process, in which first the tube is plugged together with the lamellae and then, for example, in an immersion bath, is soldered together. It can be seen from the geometry of the passage opening 30 of the lamella 20 that, due to its shape, the U-shaped deflection of the tube into the x and z directions is well guided.
  • the defrost heater is also ideally located on the pipe, the defrost heater can only be installed after soldering. That is, the pipe has in the execution of Fig. 5 at the time of soldering in z'-direction a certain play, so that can not be made in the manufacturing process without further ado that it remains at its desired position.
  • Fig. 7 an alternative embodiment of the defrost heater is shown.
  • the lamella would have an elongate passage opening adapted to the outer dimensions of the pipe deflection, with an enlargement on the right side for a part the pipe heating. Even so, the bent pipe is well guided in its position in the x and z directions during the manufacturing process and before the pipe heater is inserted.

Claims (8)

  1. Évaporateur (1) pour un appareil frigorifique, notamment un appareil frigorifique à usage domestique comprenant un tube pouvant être traversé par un réfrigérant, muni d'un orifice d'entrée (5) et d'un orifice de sortie (7), le tube présentant des coudes en forme de U ayant des côtés en sections de tube (10, 10', 16, 16') parallèles les unes aux autres et s'étendant de manière rectiligne, et
    le tube étant logé dans des orifices de passage (30) de lamelles (20),
    un chauffage de dégivrage (50) étant ménagé le long au moins d'une partie des sections de tube rectilignes (10, 10') et le chauffage de dégivrage (50) étant guidé et logé dans les orifices de passage (30) des lamelles (20), caractérisé en ce que les sections de tube rectilignes (10, 10') qui, conformément à l'écoulement du réfrigérant, sont voisines à l'orifice d'entrée (5) sont munies du chauffage de dégivrage (50) et en ce que les sections de tube rectilignes (16, 16') qui, conformément à l'écoulement du réfrigérant, sont voisines à l'orifice de sortie (7), ne sont pas munies d'un chauffage de dégivrage.
  2. Évaporateur (1) selon la revendication 1, caractérisé en ce que le chauffage de dégivrage (50) peut être retiré de l'évaporateur sur un des côtés des coudes (12) et/ou y être monté.
  3. Évaporateur (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le chauffage de dégivrage (50) présente au moins un coude (52) en forme de U, lequel est attribué à un coude en forme de U du tube, et en ce que le chauffage de dégivrage (50) s'étend le long d'un côté (10) du tube dans une première direction radiale du tube et en ce qu'il s'étend le long de l'autre côté (10') du tube dans une deuxième direction radiale du tube, et en ce que la deuxième direction radiale se différencie d'au moins 90° de la première direction radiale.
  4. Évaporateur (1) selon la revendication 3, caractérisé en ce que la deuxième direction radiale se différencie de 180° de la première direction radiale.
  5. Évaporateur (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le chauffage de dégivrage présente, à la manière de méandres, une pluralité de coudes (52) en forme de U qui sont attribués aux coudes en forme de U du tube, et en ce que le chauffage de dégivrage s'étend dans différentes directions radiales du tube le long des côtés rectilignes et en ce que les directions radiales sont différentes en cas de côtés du tube respectivement voisins.
  6. Évaporateur (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le chauffage de dégivrage (50) est un chauffage électrique par résistance.
  7. Évaporateur (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le chauffage de dégivrage présente une pluralité de spires en forme de U, lesquelles sont toutes situées dans un plan.
  8. Appareil frigorifique et/ou congélateur muni d'un évaporateur (1) selon l'une quelconque des revendications 1 à 7 et d'une commande ou d'un dispositif de régulation pour l'activation du chauffage de dégivrage et donc pour le dégivrage de l'évaporateur.
EP11775804.5A 2010-11-08 2011-10-26 Évaporateur Not-in-force EP2638337B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010043542 DE102010043542A1 (de) 2010-11-08 2010-11-08 Verdampfer
PCT/EP2011/068787 WO2012062581A2 (fr) 2010-11-08 2011-10-26 Évaporateur

Publications (2)

Publication Number Publication Date
EP2638337A2 EP2638337A2 (fr) 2013-09-18
EP2638337B1 true EP2638337B1 (fr) 2015-01-28

Family

ID=44863054

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11775804.5A Not-in-force EP2638337B1 (fr) 2010-11-08 2011-10-26 Évaporateur

Country Status (5)

Country Link
EP (1) EP2638337B1 (fr)
CN (1) CN103201570B (fr)
DE (1) DE102010043542A1 (fr)
ES (1) ES2529667T3 (fr)
WO (1) WO2012062581A2 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102840723A (zh) * 2012-10-12 2012-12-26 苏州金科信汇光电科技有限公司 冷却排管防结冰装置
CN105352227A (zh) * 2015-11-20 2016-02-24 苏州汉克山姆照明科技有限公司 一种防结冰型冷却排管
CN105241129A (zh) * 2015-11-20 2016-01-13 苏州汉克山姆照明科技有限公司 一种可除冰霜的冷却排管
CN105485970A (zh) * 2015-11-20 2016-04-13 苏州汉克山姆照明科技有限公司 一种高效除霜冷却排管
CN107514842A (zh) * 2016-06-17 2017-12-26 杭州三花家电热管理系统有限公司 一种换热器
CN109869973B (zh) * 2017-12-05 2022-03-29 松下电器产业株式会社 冷冻冷藏库
EP3705811A1 (fr) * 2019-03-08 2020-09-09 Daikin Industries, Ltd. Unité extérieure pour pompe à chaleur
CN114061240B (zh) * 2020-07-30 2023-08-04 海信冰箱有限公司 一种加热管及冰箱

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Publication number Priority date Publication date Assignee Title
DE1000836B (de) * 1954-07-31 1957-01-17 Andrew George Heron Vorrichtung zum Enteisen von Kuehleinrichtungen
US3285334A (en) * 1961-12-11 1966-11-15 Peerless Of America Integral dual-passage heat exchange tubing with reverse bends
JPS52112550U (fr) * 1976-02-25 1977-08-26
US4432211A (en) 1980-11-17 1984-02-21 Hitachi, Ltd. Defrosting apparatus
JPS58110976A (ja) * 1981-12-24 1983-07-01 昭和アルミニウム株式会社 蒸発器およびその製造方法
WO2003099487A1 (fr) * 2002-05-29 2003-12-04 Arçelik A.S. Procede pour produire un evaporateur
US8087261B2 (en) 2003-11-28 2012-01-03 Lg Electronics Inc. Defroster for evaporator in refrigerator
ITVE20050033U1 (it) * 2005-10-20 2007-04-21 I R C A S P A Ind Resistenze Evaporatore a lamelle per impianti refrigeranti provvisto di dispositivo per effettuare lo sbrinamento.
JP2008008519A (ja) * 2006-06-27 2008-01-17 Yanmar Co Ltd 冷凍コンテナ

Also Published As

Publication number Publication date
WO2012062581A3 (fr) 2012-10-04
DE102010043542A1 (de) 2012-05-10
ES2529667T3 (es) 2015-02-24
CN103201570B (zh) 2015-03-18
EP2638337A2 (fr) 2013-09-18
WO2012062581A2 (fr) 2012-05-18
CN103201570A (zh) 2013-07-10

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