EP0429953B1 - Condenseur refroidi par air pour sèche-linge - Google Patents

Condenseur refroidi par air pour sèche-linge Download PDF

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Publication number
EP0429953B1
EP0429953B1 EP90121783A EP90121783A EP0429953B1 EP 0429953 B1 EP0429953 B1 EP 0429953B1 EP 90121783 A EP90121783 A EP 90121783A EP 90121783 A EP90121783 A EP 90121783A EP 0429953 B1 EP0429953 B1 EP 0429953B1
Authority
EP
European Patent Office
Prior art keywords
plates
frame
condenser according
foils
stacked
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.)
Expired - Lifetime
Application number
EP90121783A
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German (de)
English (en)
Other versions
EP0429953A3 (en
EP0429953A2 (fr
Inventor
Günter Dr. Wentzlaff
Stefan Dipl.-Ing. Morath
Klaus Dipl.-Ing. Grunert (Fh)
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.)
BOSCH-SIEMENS HAUSGERAETE GMBH
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0429953A2 publication Critical patent/EP0429953A2/fr
Publication of EP0429953A3 publication Critical patent/EP0429953A3/de
Application granted granted Critical
Publication of EP0429953B1 publication Critical patent/EP0429953B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/24—Condensing arrangements
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0025—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being formed by zig-zag bend plates
    • 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
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/065—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material the heat-exchange apparatus employing plate-like or laminated conduits

Definitions

  • the invention relates to an air-cooled condenser for condensing the laundry moisture transferred into the process air from a household clothes dryer, the condenser containing hollow plates stacked at a distance from one another and the spaces between the plates during operation of process air and the cavities of the plates in the cooling air flows essentially in cross flow to the process air.
  • Such a capacitor is known from German utility model 80 17 935.
  • sandwich-like plates are held in guide grooves of a channel-like housing and can be individually pulled out of these guide grooves and inserted again.
  • the sandwich shape of the panels is created by two parallel metal strips, which are soldered or glued to the ribs in between. This results in a rigid and stable construction which, according to the task, should also withstand cleaning operations by the housewife after it has been removed from the housing.
  • German utility model 83 18 395 which contains stacked plates as a package, which according to DE-AS 30 27 900 made of aluminum sheet bent and provided with ribbing in the cooling air duct.
  • the stacked panels are molded into a package and held at a distance from each other by plastic molded parts attached to the side and glued with sealing compound. As a result, they can be removed as a whole stack for the purpose of cleaning and thus better withstand the usual stresses caused by cleaning operations.
  • the known plates are very expensive in terms of the material used (aluminum) and in terms of their manufacture.
  • the assembly of the plates and their sealing attachment, both as individually insertable plates and as plates glued into the separate side parts, is very complex and prone to errors with regard to the tightness between the cooling air and the process air duct.
  • the invention has for its object to provide a construction for a capacitor mentioned in the introduction, in which the sealing problems mentioned above are avoided and the manufacture of the capacitor, in particular the assembly of its individual parts into a package, is suitable for fully automated production.
  • the hollow plates are formed essentially from a grid-like plastic frame with inlet and outlet openings for the cooling air containing opposite side walls, which are aligned by several in the flow direction of the cooling air, the partition walls between connect the inflow and outflow openings to the side cheeks, and the outer frame members are connected to one another, and that the common interfaces between the plate cavities and the plate spacing spaces are formed by plastic films which adhere to seal the sides of the interfaces and form the condensation surfaces for the moisture from the process air.
  • Such a construction enables the automatic production of the plates from molded plastic parts and the automatic placement of plastic films and their connection to the frame.
  • the individual plates can also be automatically stacked and connected to one another in a suitable manner.
  • the height of the partition walls and the frame spars is equal to the frame thickness and their surfaces facing the condensation surface serve as support and sealing surfaces for the foils. This gives the plastic films enough contact surfaces so that the risk of curling or folding of the films is largely avoided. Because of the same heights of the dividing walls and the frame spars, the foils lie on the supporting surfaces in a sealing manner and thus prevent the foils from fluttering in the channels in the event of strong currents and thereby lifting off the supporting surfaces.
  • the foils of each plate can consist of one piece which is placed around one of the two frame spars. This shape simplifies production in that the films are pulled off a roll, placed on an outer frame edge, folded over on the opposite frame edge, returned as a condensation surface to the first frame edge and can be cut off there.
  • embodiments of the invention are suitable in which the foils are welded or glued to its material at the contact surfaces to the frame or in which the foils are extrusion-coated with its material on the contact surfaces to the frame are.
  • the side cheeks are integrally connected to the height of the spacing spaces and spacing strips which extend over the entire width of the cooling air cavities.
  • the spacer strips integrated in the frame molding reduce the number of individual parts required for a capacitor according to the invention. Furthermore, the number of sealing surfaces can be reduced.
  • the stacked plates are sealingly connected to one another at the contact surfaces between the one longitudinal edge of the side cheeks and the free longitudinal edge of the spacer strips. Such a connection results in a compact plate stack as a package.
  • the sealing connection can also consist of an adhesive or a weld.
  • the invention can advantageously be developed in that the plastic films are pre-stretched before being connected to the plastic frame.
  • pre-stretched films shrink films
  • shrink films are commercially available and are always used where a firm position of the films is required after heat treatment. This use has the essential advantage in the condenser according to the invention that after the heat treatment shrinked films no longer present any risk of wrinkling, which would lead to the accumulation of condensate during operation of the tumble dryer and reduce the heat transfer.
  • a capacitor according to the invention can best be handled in practice in that the stacked plates form a block, the top and bottom of which are covered by a plastic cover plate at a distance from the next stacked plate. As a result, the plastic foils sensitive condensation surfaces.
  • the entire package of stacked plates and plastic cover plates can be held together by at least two tensioning straps wrapping around the package.
  • tensioning straps are known for example as parcel straps, have a high tension and can be attached automatically. Special sealing measures on the contact surfaces of the stacked plates and plastic cover plates would be unnecessary.
  • the tumble dryer shown as an exemplary embodiment in FIG. 1 has a housing 10 with an internal drying space 11. Between this and the rear wall of the dryer there is an inlet air duct 12 in which the air is heated by means of a heating device 13 and by a blower 14 via a grille wall 15 is blown into the drying room. At the front of the dryer there is a loading opening 16 for loading the laundry parts to be dried. The loading opening is then closed by a door 17.
  • the process air comes from there into the air-cooled condenser 2.
  • the condenser is shown partially broken and contains heat-conducting plates 21 with cavities which are traversed by fresh cooling air transversely to the process air.
  • the process air is shown on the warm side by a solid arrow and on the cold side by a dashed, streaked arrow.
  • the moisture collects at the outlet of the condenser and flows off to the condensate collecting container 22, from which the condensate can be pumped out or removed manually.
  • a door or flap 23 which can be opened by the operator for the purpose of cleaning the condenser 2. Before cleaning, the plates 21 can be pulled out of the condenser 2 as a package and cleaned outside.
  • the plates 21 contain a uniform plastic molding.
  • This molded part is formed from two side walls 24, which together with end strips 25 form the support frame for the film 26 shown in FIG. 3.
  • the side walls 24 contain inflow openings 27 and outflow openings 28 for the cooling air.
  • partition walls 29 are also provided which run parallel to the end strips 25 and are oriented essentially in the flow direction of the cooling air and are as high as the entire frame is thick. These dividing walls 29 can deviate regularly or irregularly from the flat shape in a manner not shown here in order to swirl the cooling air flowing through the cooling air channels delimited by them. As a result, the cooling air comes into closer contact with the condensation surfaces formed by the film.
  • the plastic frames 24, 25 with their partitions 29 form the cavities for the cooling air.
  • the process air sweeps across the cooling air over the condensation surfaces formed by the drawn-on plastic film 26.
  • the plates each form spacing spaces which are maintained by spacer strips 30 on the undersides of the cheeks 24.
  • spacer strips sit on the respective upper edge of the side cheek 24 of the plate below.
  • spacer strips 30 arranged on both sides, on the one hand, and the underside of the upper plate and the upper side of the lower plate, on the other hand, a space is formed which guides the process air.
  • the film 26 can, as shown in Fig. 3, consist of one piece and be folded around a face bar 25 so that it lies with its imaginary line network 31 on the respective contact surfaces of the plastic molding (Fig. 2).
  • the longitudinal lines 32 lie on the upper or lower long narrow sides 33 of the side walls 24 and the transverse lines 34 of the line network 31 on the support surfaces 35 of the partition walls 29.
  • the materials of the film and the frame can be welded or glued to one another at these contact surfaces.
  • Another fastening option is also that the film material is at least partially extrusion-coated by the material of the frame along the contact surfaces. This would mean inserting the foils into the injection mold in the manufacturing process for such a plate before the plastic frame is injection molded. 3, the plastic films can also be present separately for each condensation surface.
  • Plates produced in this way can be stacked in accordance with the exemplary embodiment in FIG. 2.
  • the number of stacked plates in one package can be varied; For use in household clothes dryers, a number of nine plates stacked on top of one another has proven to be sufficient, starting from a base area available for the condenser.
  • Such a stack of stacked plates can become a uniformly manageable part by sealingly connecting the individual plates to one another at their surfaces in contact with one another - in the present example these are the lower longitudinal strips of the spacer strips 30 and the upper longitudinal strips of the side walls 24.
  • Such a sealing connection can consist of an adhesive or a weld.
  • the contact areas can also be through mechanical pressure of the plates become tight.
  • an additional application of a sealant is recommended because the seal between the cooling air and process air channels should be as ideal as possible.
  • Such a mechanical connection can be achieved by clamping the side panels and spacer bars stacked one above the other.
  • a plastic cover plate is advantageously provided at a distance from the next stacked plate, such a plate pack could be used for the mechanical connection of the plates to one another by at least two Package wrapping straps to be held together.
  • the distance of the additional plastic cover plate on the top should then be maintained by means of separate spacer strips.
  • the plastic films attached to the frame can advantageously be pre-stretched according to an embodiment of the invention before they are processed. Because such plastic frames are subject to unwanted deformations after their injection molding process (warping, shrinkage, thermal expansion), folds could form in the film glued to the frame, in which condensate collects, which hinders the transition from the process air to the cooling air. Such a pre-stretched, so-called shrink film would avoid this effect because it tensions itself automatically when the capacitor is started up due to the heat introduced. This measure ensures a film that is taut and wrinkle-free in any correct operating mode, from which the condensate can flow off unhindered.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Claims (13)

  1. Condenseur à refroidissement par air pour condenser l'humidité du linge, transmise par l'air du processus, hors d'un sèche-linge électroménager, le condenseur contenant des plaques creuses empilées avec un certain écartement entre elles et de l'air de refroidissement traversant les espaces d'écartement entre les plaques pendant la circulation de l'air du processus et les espaces creux des plaques selon une direction générale qui croise celle de l'air du processus,
       caractérisé en ce que
       chaque plaque creuse est constituée pour l'essentiel d'un cadre en matière plastique (24, 25, 29) en forme de grille et comportant des jumelles latérales (24) qui sont situées à l'opposé l'une de l'autre et qui contiennent des ouvertures d'entrée et d'évacuation (27, 28) pour l'air de refroidissement, ces jumelles latérales étant reliées entre elles par plusieurs cloisons (29), qui sont orientées parallèlement à la direction de circulation de l'air de refroidissement et qui sont rattachées aux jumelles latérales (24) entre les ouvertures d'entrée et d'évacuation (27, 28), et par des longerons de cadre (25) extérieurs,
       et les surfaces limites communes entre les espaces creux des plaques et les espaces d'écartement entre les plaques sont formées par des feuilles en matière plastique (26) qui adhèrent de manière étanche aux côtés des surfaces limites et qui constituent les surfaces de condensation pour l'humidité provenant de l'air du processus.
  2. Condenseur selon la revendication 1, caractérisé en ce que la hauteur des cloisons (29) et des longerons de cadre (25) est égale à l'épaisseur (D) du cadre et que leurs surfaces (35) tournées vers les surfaces de condensation servent de surfaces d'appui et d'étanchéité pour les feuilles (26).
  3. Condenseur selon la revendication 1 ou 2, caractérisé en ce que les feuilles (26) de chaque plaque sont constituées d'une seule pièce qui est posée autour d'un des deux longerons de cadre (25).
  4. Condenseur selon une des revendications précédentes, caractérisé en ce que les feuilles (26) sont soudées aux surfaces de contact (33, 35) touchant le cadre (24, 25, 29) avec le matériau de celui-ci.
  5. Condenseur selon une des revendications 1 à 3, caractérisé en ce que les feuilles (26) sont collées aux surfaces de contact (33, 35) touchant le cadre (24, 25, 29) avec le matériau de celui-ci.
  6. Condenseur selon une des revendications 1 à 3, caractérisé en ce que les feuilles (26) sont rattachées aux surfaces de contact (33, 35) touchant le cadre (24, 25, 29) par extrusion du matériau de celui-ci.
  7. Condenseur selon l'une des revendications précédentes, caractérisé en ce que les jumelles latérales (24) sont liées d'une seule pièce aux barres d'écartement (30) qui déterminent la hauteur des espaces d'écartement et qui s'étendent sur toute la largeur des espaces creux pour l'air de refroidissement.
  8. Condenseur selon la revendication 7, caractérisé en ce que les plaques empilées (figure 2) sont liées les unes aux autres de manière étanche au niveau des surfaces de contact entre l'arête longitudinale des jumelles latérales (24) et l'arête longitudinale libre des barres d'écartement (30).
  9. Condenseur selon la revendication 8, caractérisé en ce que la liaison étanche est un collage.
  10. Condenseur selon la revendication 8, caractérisé en ce que la liaison étanche est une soudure.
  11. Condenseur selon une des revendications précédentes, caractérisé en ce que les feuilles en matière plastique (26) sont rétractées avant d'être liées au cadre en matière plastique (24, 25, 29).
  12. Condenseur selon une des revendications 8 à 10, caractérisé en ce que les plaques empilées (figure 2) forment un bloc dont la face supérieure et la face inférieure sont recouvertes chacune par une plaque de couverture en matière plastique à une certaine distance de la prochaine plaque empilée.
  13. Condenseur selon la revendication 12, caractérisé en ce que tout le paquet constitué de plaques empilées et de plaques de couverture en matière plastique est maintenu ensemble par au moins deux colliers de serrage qui entourent le paquet.
EP90121783A 1989-12-01 1990-11-14 Condenseur refroidi par air pour sèche-linge Expired - Lifetime EP0429953B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3939855 1989-12-01
DE3939855A DE3939855A1 (de) 1989-12-01 1989-12-01 Luftgekuehlter kondensator fuer einen haushalt-waeschetrockner

Publications (3)

Publication Number Publication Date
EP0429953A2 EP0429953A2 (fr) 1991-06-05
EP0429953A3 EP0429953A3 (en) 1991-09-25
EP0429953B1 true EP0429953B1 (fr) 1996-01-17

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ID=6394645

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90121783A Expired - Lifetime EP0429953B1 (fr) 1989-12-01 1990-11-14 Condenseur refroidi par air pour sèche-linge

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EP (1) EP0429953B1 (fr)
DE (2) DE3939855A1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4237117A1 (de) * 1992-11-03 1994-05-05 Bosch Siemens Hausgeraete Verfahren zum Herstellen eines Pakets von Wärmetauscher-Platten für einen Haushalt-Wäschetrockner, Werkzeug für ein solches Herstellungsverfahren und nach diesem Verfahren hergestelltes Plattenpaket
ES2173239T3 (es) 1995-11-20 2002-10-16 Electrolux Zanussi Elettrodome Procedimiento de fabricacion de un dispositivo cambiador de calor de corrientes cruzadas.
DE19838525C2 (de) * 1997-09-03 2002-12-05 Joma Polytec Kunststofftechnik Kreuzstrom-Wärmetauscher für Kondensationswäschetrockner und Herstellungsverfahren
EP0982427B1 (fr) * 1998-08-25 2003-03-05 Joma-Polytec Kunststofftechnik GmbH Echangeur de chaleur à courants croisés pour sèche-linge avec condenseur
EP1203923B1 (fr) 2000-11-01 2006-07-26 AKG-Thermotechnik GmbH & Co.KG Echangeur de chaleur, en particulier sèche-linge à condensation
NL1022794C2 (nl) * 2002-10-31 2004-09-06 Oxycell Holding Bv Werkwijze voor het vervaardigen van een warmtewisselaar, alsmede met de werkwijze verkregen warmtewisselaar.
CN100451231C (zh) * 2003-04-11 2009-01-14 乐金电子(天津)电器有限公司 冷凝式衣类烘干机用冷凝器的结构
KR100595188B1 (ko) 2003-09-24 2006-07-03 엘지전자 주식회사 응축식 의류건조기의 응축기
US7036243B2 (en) * 2003-12-22 2006-05-02 Lg Electronics Inc. Laundry dryer and condenser assembly thereof
KR101021778B1 (ko) * 2003-12-26 2011-03-15 엘지전자 주식회사 건조기의 컨덴서 하단부 배수유로 구조
KR100826537B1 (ko) 2007-02-23 2008-05-02 엘지전자 주식회사 열교환기 및 이를 포함한 응축식 의류건조기
US8595951B2 (en) * 2010-01-13 2013-12-03 Peet Shoe Dryer, Inc. Reservoir bladder dryer system
ITRN20100080A1 (it) 2010-12-22 2012-06-23 Indesit Co Spa Elettrodomestico
CN104911882B (zh) 2014-03-14 2018-10-30 青岛海尔滚筒洗衣机有限公司 一种干衣机或洗干一体机
CN104911877B (zh) * 2014-03-14 2018-12-25 青岛海尔滚筒洗衣机有限公司 一种具有框架的热交换器
CN104911881B (zh) * 2014-03-14 2019-01-22 青岛海尔滚筒洗衣机有限公司 一种空气冷凝结构
DE102014212085A1 (de) * 2014-06-24 2015-12-24 BSH Hausgeräte GmbH Wärmetauscher für ein Haushaltsgerät, Verfahren zum Herstellen eines solchen sowie Haushaltsgerät mit einem solchen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8017935U1 (de) * 1980-07-04 1980-10-02 Sueddeutsche Kuehlerfabrik Julius Fr. Behr Gmbh & Co Kg, 7000 Stuttgart Luftgekühlter Kondensations-Wärmetrockner
DE3027900C2 (de) * 1980-07-23 1986-11-06 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Luftgekühlter Wärmetauscher für Haushalt-Wäschetrockner
DE8318395U1 (de) * 1983-06-24 1983-10-20 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Haushalt-waeschetrockner

Also Published As

Publication number Publication date
EP0429953A3 (en) 1991-09-25
EP0429953A2 (fr) 1991-06-05
DE59010071D1 (de) 1996-02-29
DE3939855A1 (de) 1991-06-06

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