EP0982427B1 - Echangeur de chaleur à courants croisés pour sèche-linge avec condenseur - Google Patents

Echangeur de chaleur à courants croisés pour sèche-linge avec condenseur Download PDF

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Publication number
EP0982427B1
EP0982427B1 EP99114748A EP99114748A EP0982427B1 EP 0982427 B1 EP0982427 B1 EP 0982427B1 EP 99114748 A EP99114748 A EP 99114748A EP 99114748 A EP99114748 A EP 99114748A EP 0982427 B1 EP0982427 B1 EP 0982427B1
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EP
European Patent Office
Prior art keywords
plate
elements
heat exchanger
accordance
foil
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
EP99114748A
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German (de)
English (en)
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EP0982427A1 (fr
Inventor
Alexander Maute
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.)
Joma Polytec Kunststofftechnik GmbH
Original Assignee
Joma Polytec Kunststofftechnik 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
Priority claimed from DE19838525A external-priority patent/DE19838525C2/de
Application filed by Joma Polytec Kunststofftechnik GmbH filed Critical Joma Polytec Kunststofftechnik GmbH
Publication of EP0982427A1 publication Critical patent/EP0982427A1/fr
Application granted granted Critical
Publication of EP0982427B1 publication Critical patent/EP0982427B1/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
    • 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
    • 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
    • F28D9/0031—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 for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0037—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 for one heat-exchange medium being formed by paired plates touching each other the conduits for the other heat-exchange medium also being formed by paired plates touching each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F28F3/046—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being linear, e.g. corrugations

Definitions

  • the invention relates to a cross-flow heat exchanger for Condensation clothes dryer with the features of the generic term of claim 1.
  • Such a heat exchanger is from DE 30 27 900 C2, Fig. 2nd and 3, known.
  • housing openings form the entry and Outlet openings for the warm, moisture-laden and process air to be cooled or dried Condensation dryer.
  • the process air is in the The interior of the housing is led through guide channels that pass through the Plates as well as the side walls of the receiving housing are defined are.
  • the plates form flat, rectangular heat sinks the top and bottom of the plate the moisture precipitate and as condensate from the Housing outlet opening can drain.
  • the plates or heat sinks are two apart overlapping, parallel and flat plate parts Aluminum sheet on only two opposite Edge parts are connected airtight. Analogous to Accordingly, receiving housings point to each other opposite, open foreheads that with corresponding openings in the side walls of the Align the receiving housing.
  • Upright webs which are in the direction of flow of the cooling air extend and parallel to each other at a lateral distance assigned. These webs form together with the two Plate parts with rectangular channels in cross section.
  • the webs are made of a meandering ribbed sheet formed, which alternately glued to both plate parts is.
  • the meandering folded ribbed sheet gives it Connection of its contact points with the two sheet metal parts the plates the necessary rigidity for their handling for cleaning the cross-flow heat exchanger. Create also a surface enlargement to improve the Heat dissipation on the cooling air side.
  • connection is made by gluing using a thermally conductive special adhesive.
  • the invention is based, cross-flow heat exchanger the task in a in the preamble of claim 1 explained, to provide known training, which is in constructive aspects through special simplicity and a good heat dissipation on the cooling air side.
  • a cross-flow heat exchanger allows to form the one to be cooled and channels to be dehumidified leading process channels on a To dispense with plate-receiving housing by now the moist air through channels of the air guide body forming plates is passed and the webs on the upper and lower, flat outside of the plates provided and are each located on an adjacent upper or Support the lower plate. Sheets and webs thus define together extending across the process air channels Cooling air ducts.
  • the construction according to the invention is distinguished by this an extremely minimal material requirement by the Plate-forming plate parts only from one out of good thermally conductive metal or thermoplastic existing film are made to which the webs have them molded on immediately during their manufacture.
  • the webs as well as the molded in the plate parts channel-like depressions for the formation of moist air ducting or condensate drainage channels lend the plate parts a cross ribbing, which despite the low Film thickness gives a high degree of rigidity.
  • the plate package created in this way is then at the plate contact points the plates welded, glued or pressure together. This can either be along two opposite edge parts or, preferably, on one A large number of points of contact between the plate parts, preferably in a homogeneous distribution over the areas of the Plate parts are made. In this last way, one becomes better stability of the composite panels achieved.
  • the webs can either be in the longitudinal direction or Flow direction be formed continuously, which is the formation of a laminar flow as advantageous turns out, or they can be divided lengthwise and the Web sections offset to one another transversely to the longitudinal direction be arranged, which is suitable for the formation of a turbulent Flow proves to be advantageous. In the latter case it happens Turbulence and therefore better heat exchange between the flowing medium and the air duct limiting webs and plate parts. Especially in this It turns out to be advantageous if the film is a Is plastic film and the webs by a corresponding Tooling are formed from the film without the Foil was cut at this point. The web sections then form a rounded, closed peripheral contour.
  • a plate pack designed for a desired cooling capacity is sealed at the end in a frame fix.
  • the dehumidification performance can thus be determined by the number of Define plates, the number of the top and bottom of the plates Bottom protruding webs should be chosen so that an optimal ratio of cooling capacity, depending on the chosen surface enlargement, to which by the number of Bridges caused pressure loss in the defined by them Can achieve cooling air channels.
  • the invention makes it possible in a very simple manner powerful cross-flow heat exchanger for different Interpret services without costly interventions in their basic constructive concept to be forced.
  • the invention thus offers a sophisticated, Complete construction system for cross-flow heat exchangers, which for existing device generations are compatible.
  • thermoformed foils To use plastic, where to manufacture the Plate parts with preference to acrylonitrile-butadiene-styrene copolymers (ABS) or polypropylene.
  • ABS acrylonitrile-butadiene-styrene copolymers
  • polypropylene This has to be achieved necessary cooling capacities or the necessary Thermal conductivity and stability a film thickness between 0.15 mm and 0.50 mm, preferably 0.3 mm as advantageous proved.
  • plastics are thermally insulators act, is, compared to materials with good Thermal conductivity, due to its use as a film, just accept a performance loss of 3 - 8%. However, this is compensated for by the fact that the Plastic film is thermoformable and the plate parts accordingly inexpensive and with any Have the surface enlarged.
  • the film to be processed is preheated and in one tool into the desired shape in one go.
  • the webs formed transversely to the channel-like depressions are made by thin metal strips inserted into the tool formed, which engage sword-like in the film.
  • the metal strips Do not cut the film, but only deep-draw it.
  • the webs are not continuous in the longitudinal direction but divided and preferably offset from one another transversely to the longitudinal direction are arranged, since then the flowing medium is not on Cut surfaces but the web sections a have rounded, closed leading edge.
  • cross-flow heat exchanger are known, in which, analogously to the invention Construction that passes cooling air between bars which is between and across to damp or Process air channels extend.
  • This damp or Process air channels are in this case folded through from Al blanks Box tubes formed while the webs to form the Cooling air ducts made of meandering folded aluminum fins are made between the levels of box pipes are introduced or glued.
  • Such cross flow heat exchangers are manufactured by AKG Thermotechnik GmbH & Co. KG manufactured in 34369 Hofgeismar and distributed.
  • the cross-flow heat exchanger shown has, for example five horizontal levels of humid air flowing through, in Cross section preferably approximately cylindrical Process air channels 10, which are at a radial distance from each other run parallel and preferably from level to level Gap are offset. Across the process air channels 10 and parallel to their levels extend in a total of six Levels in cross section of rectangular cooling air ducts 12.
  • Both types of channels 10 and 12 are through one above the other stacked, preferably rectangular plates 14 formed, which in turn each consist of two identical shapes and plate parts 16 and 18 assigned symmetrically to one another are made (see Figs. 3 and 4).
  • these plate parts 16, 18 in one piece from a film made of thermoplastic material, preferably polypropylene. You may as well in one piece from a foil made of heat-conducting metal, preferably aluminum.
  • Each plate member 18 is along its two opposite longitudinal edge pieces 20 and 22 with such 20 'and 22' designated the one symmetrically assigned to them Plate part 16 preferably by gluing, welding, Pressure joining or folding tightly connected.
  • each plate part 16 or 18 with molded to each other parallel, groove-like depressions 24 equipped.
  • the cooling air channels 12 are on the plate parts 16, 18 transversely to the recesses 24 or their airtight interconnected longitudinal edge parts 20, 22 extending perpendicularly projecting and mutually parallel webs 26 formed.
  • Each plate 14 is thus characterized by upper and lower, in webs 26 lying in a common vertical plane.
  • Recesses 24 and webs 26 give the thin Plastic films of preferably only 0.20 mm to 0.40 mm Thickness a stiffness that ensures that in mutual solid bond of stacked plates 14 according to Figure 1 is a stiffened unit is achieved.
  • the webs 26 of a plate 14 for forming the cooling air channels 12 engage between two webs 26 of a plate 14 located below or above them, preferably in such a way that adjacent webs 26 touch one another (1st variant ).
  • the webs 26 of two plates 14, as indicated by dash-dotted lines to engage in the middle between those of the other plate 16, as a result of which the number of cooling air ducts 12 can be doubled and the efficiency of the heat exchanger increases (second variant).
  • the plates 14 of the plate pack are at their ends together in a known manner each in a plastic existing holding frame 28 and 30 kept sealed what by means of an adhesive 32, preferably made of cast resin, is accomplished.
  • the webs 26 of the upper and lower plates 14 are for Formation of the outside of the heat exchanger Cooling air channels 12 each through a circuit board 32 or 34 covered, the front also in the holding frame 28, 30 are set.
  • the cross-flow heat exchanger thus formed thus has itself none to form the channels 10 for the condensate drain required housing on. It is a unit in one Housing opening of a condensation dryer insertable, for its handling on its front A handle 38 is provided on the end face.
  • a method of manufacturing the plate parts 18 Metal foil is illustrated in Figures 5 and 6.
  • vacuum thermoforming For the manufacture of plate parts from plastic film, for example polypropylene in a preferred thickness of approx. 0.20 mm, vacuum thermoforming can be used become.
  • the film is preheated and in a tool preferably in a single move to the desired shape drawn.
  • the aforementioned process step of Pushing them together is then not necessary.
  • Tools are fins or sword-like metal strips used, which the webs 26 shown in the figures molding.

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

Claims (13)

  1. Echangeur thermique à courants inversés pour un séche-linge à condensation, présentant une pluralité de plaques (14) disposées de manière sensiblement horizontale et reliées les unes aux autres de manière fixe, qui sont disposées de manière à être perpendiculaires par rapport au plan des plaques en étant parallèles les unes aux autres avec un espacement et qui sont constituées respectivement par deux éléments de plaque (16, 18) disposés en étant parallèles l'un à l'autre, qui sont raccordés l'un à l'autre de manière étanche à l'air le long de deux éléments de bord (20, 20 ou 20', 22') opposés, et constituent ainsi un corps d'alimentation en air ouvert et plat au niveau d'extrémités frontales opposées les unes aux autres, moyennant quoi l'un des éléments de plaque (16 ou 18) supporte, au niveau de l'un de ses côtés plats, une pluralité de barres (26) formées au niveau de l'élément de plaque, qui sont disposées de manière à être parallèles les unes aux autres avec un espacement, qui font saillie en étant perpendiculaires par rapport au côté plat, et qui constituent, conjointement avec un élément de plaque (16 ou 18) reposant sur les barres (26) des canaux d'alimentation en air (12) pour l'air froid,
       caractérisé en ce que les plaques (14) sont traversées par l'air humide ou l'air de traitement, dont les deux éléments de plaque (16 ou 18) sont formés par une feuille (40) réalisée dans un métal qui est un bon conducteur thermique ou dans une substance thermoplastique, en ce que les plaques (14), au niveau de leurs extrémités frontales ouvertes, sont fixées mutuellement de manière étanche dans un châssis de maintien (28 ou 30) respectivement, en ce que les barres (26) font saillie par rapport au côté plat extérieur de chaque élément de plaque (16 ou 18) d'une plaque (14) en s'étendant transversalement par rapport à l'ensemble des éléments de bord (20, 22 ou 20', 22') raccordés les uns aux autres de manière étanche à l'air, et sont formées par formage et reposent ensemble sur un élément de plaque (16 ou 18) d'une plaque voisine (14), et en ce que les plaques (14) présentent respectivement une pluralité de canaux d'air de traitement (10) parallèles les uns aux autres qui s'étendent dans la direction d'écoulement de l'air humide, lesquels canaux sont formés par des évidements (24) en forme de rigoles formés de manière symétrique dans leurs éléments de plaque (16, 18).
  2. Echangeur thermique à courants inversés selon la revendication 1, caractérisé en ce que la feuille (40) destinée à fabriquer les éléments de plaque (16, 18) est une feuille d'aluminium présentant une épaisseur comprise entre 0,14 mm et 0,20 mm, de préférence égale à 0,15 mm.
  3. Echangeur thermique à courants inversés selon la revendication 2, caractérisé en ce que les éléments de plaque (16, 18) constitués d'une feuille d'aluminium (40) et raccordés les uns aux autres de manière étanche à l'air le long de deux éléments de bord opposés (20, 22 ou 20', 22') sont collées, pliées ou appliquées par pression mutuellement.
  4. Echangeur thermique à courants inversés selon la revendication 1, caractérisé en ce que la feuille de matière plastique (40) destinée à fabriquer les éléments de plaque (16, 18) est réalisée en matière thermoplastique, comme des copolymères acrylnitrile-styrène-butadiène (ABS) ou polypropylène, et présente une épaisseur comprise entre 0,15 et 0,50 mm, de préférence égale à 0,3 mm.
  5. Echangeur thermique à courants inversés selon la revendication 4, caractérisé en ce que les éléments de plaque (16, 18) réalisés en matière thermoplastique (40) sont raccordés pour constituer une plaque (14) au niveau des éléments de bord opposés (20, 22 ou 20', 22') par soudure, collage ou application par pression.
  6. Echangeur thermique à courants inversés selon l'une quelconque des revendications précédentes, caractérisé en ce que les éléments de plaque (16, 18), au niveau d'une pluralité de points d'appui, de préférence répartis sur l'ensemble de la surface des plaques, sont raccordés par soudure, collage ou application par pression.
  7. Echangeur thermique à courants inversés selon l'une quelconque des revendications précédentes, caractérisé en ce que les barres (26) sont configurées de manière à être continues dans leur direction longitudinale.
  8. Echangeur thermique à courants inversés selon l'une quelconque des revendications 1 à 6, caractérisé en ce que les barres (26) sont divisées dans leur direction longitudinale et les sections de barres (50) sont déplacées les unes par rapport aux autres transversalement par rapport à leur direction longitudinale.
  9. Echangeur thermique à courants inversés selon la revendication 8, caractérisé en ce que la feuille est une feuille de matière plastique et les barres (26) sont formées à partir d'une feuille de matière plastique sans être séparées à cet emplacement, de telle sorte que les barres (26) sont fermées dans la direction de la périphérie.
  10. Procédé de fabrication d'éléments de plaque (16, 18) pour réaliser un échangeur thermique à courants inversés selon la revendication 2 ou la revendication 4, caractérisé en ce que, dans les feuilles (40), on forme des sections d'évidements (42), situées les unes derrière les autres avec un espacement, des évidements en forme de rigoles (24) et en ce que la feuille (40) est formée entre les sections d'évidements (42) transversalement par rapport à leur direction longitudinale pour former les barres.
  11. Procédé selon la revendication 10, caractérisé en ce qu'une feuille de matière plastique (40) est préchauffée et déformée sous vide par voie thermique.
  12. Procédé selon la revendication 11, caractérisé en ce que le procédé est réalisé en un seul processus de déformation.
  13. Procédé selon la revendication 10, caractérisé en ce que, durant le traitement d'une feuille métallique (40), elle est préformée entre les sections d'évidements (42) transversalement par rapport à leur direction longitudinale et sous la forme d'un comble à pignon dans leur direction de moulage et en ce que, finalement, la feuille (40) destinée à former des barres est tirée dans son ensemble dans la direction longitudinale des sections d'évidements (42), en ce que les sections d'évidements (42) sont en contact sur le côté frontal et en ce que les deux moitiés des sections en forme de comble à pignon (44, 46) destinées à former les barres sont disposées à proximité les unes des autres ou sont apposées les unes aux autres.
EP99114748A 1998-08-25 1999-07-28 Echangeur de chaleur à courants croisés pour sèche-linge avec condenseur Expired - Lifetime EP0982427B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19838525 1998-08-25
DE19838525A DE19838525C2 (de) 1997-09-03 1998-08-25 Kreuzstrom-Wärmetauscher für Kondensationswäschetrockner und Herstellungsverfahren

Publications (2)

Publication Number Publication Date
EP0982427A1 EP0982427A1 (fr) 2000-03-01
EP0982427B1 true EP0982427B1 (fr) 2003-03-05

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007007169U1 (de) 2007-05-16 2008-09-25 Akg-Thermotechnik Gmbh & Co. Kg Wärmeaustauscher für gasförmige Medien
EP2565321A1 (fr) 2011-09-01 2013-03-06 BSH Bosch und Siemens Hausgeräte GmbH Séchoir doté d'un échangeur thermique à flux croisé et son procédé de fonctionnement

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KR100459136B1 (ko) 2002-08-21 2004-12-03 엘지전자 주식회사 응축식 의류건조기용 응축기의 냉각핀 배열구조
DE10356417A1 (de) 2003-11-27 2005-06-30 Joma-Polytec Kunststofftechnik Gmbh Kreuzstromwärmetauscher für Kondensationswäschetrockner
DE102004055550A1 (de) * 2004-11-17 2006-05-24 Kwm Weisshaar Blechbearbeitung Gmbh Wärmetauscher
EP2306134B1 (fr) * 2009-10-01 2012-05-30 Techspace Aero S.A. Procédé de fabrication d'un échangeur de chaleur et échangeur obtenu par le procédé
EP2338842A3 (fr) * 2009-12-28 2011-10-26 Woongjin Coway Co., Ltd. Module de désodorisation
US8827249B2 (en) * 2011-11-07 2014-09-09 Spx Cooling Technologies, Inc. Air-to-air atmospheric exchanger
US8833741B2 (en) * 2011-11-07 2014-09-16 Spx Cooling Technologies, Inc. Air-to-air atmospheric exchanger
CN102505437B (zh) * 2011-11-08 2016-11-23 青岛海尔滚筒洗衣机有限公司 一种干衣冷凝用热交换器及干衣机
US9869052B2 (en) 2011-11-08 2018-01-16 Haier Group Corporation Heat exchanger for condensation in clothes drying and clothes drying system and clothes dryer and drying method thereof
EP2614764A3 (fr) * 2012-01-12 2017-03-29 Winterhalter Gastronom Gmbh Echangeur de chaleur d'eaux usées pour lave-vaisselle ainsi que lave-vaisselle
FR3036179A1 (fr) * 2015-05-12 2016-11-18 Tmw Echangeur thermique moule en deux parties et procede de fabrication d’un tel echangeur
EP3447428A1 (fr) * 2017-08-22 2019-02-27 Airec AB Plaque de transfert de chaleur et échangeur de chaleur
DE102019215569A1 (de) 2019-10-10 2021-04-15 Thyssenkrupp Ag Wasserabtrennung aus dem Rauchgas von Klinkerbrennanlagen

Family Cites Families (4)

* 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
DE3929004A1 (de) * 1989-09-01 1991-03-07 Behr Gmbh & Co Waermetaeuscher
DE3939855A1 (de) * 1989-12-01 1991-06-06 Bosch Siemens Hausgeraete Luftgekuehlter kondensator fuer einen haushalt-waeschetrockner

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007007169U1 (de) 2007-05-16 2008-09-25 Akg-Thermotechnik Gmbh & Co. Kg Wärmeaustauscher für gasförmige Medien
EP1992898A2 (fr) 2007-05-16 2008-11-19 AKG-Thermotechnik GmbH & Co.KG Echangeur thermique pour fluides caloporteurs gazeux
EP2565321A1 (fr) 2011-09-01 2013-03-06 BSH Bosch und Siemens Hausgeräte GmbH Séchoir doté d'un échangeur thermique à flux croisé et son procédé de fonctionnement
DE102011081940A1 (de) 2011-09-01 2013-03-07 BSH Bosch und Siemens Hausgeräte GmbH Trockner mit einem Kreuzstromwärmetauscher und Verfahren zu seinem Betrieb

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