EP0481178B1 - Laundry dryer with a condenser - Google Patents

Laundry dryer with a condenser Download PDF

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Publication number
EP0481178B1
EP0481178B1 EP91113072A EP91113072A EP0481178B1 EP 0481178 B1 EP0481178 B1 EP 0481178B1 EP 91113072 A EP91113072 A EP 91113072A EP 91113072 A EP91113072 A EP 91113072A EP 0481178 B1 EP0481178 B1 EP 0481178B1
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EP
European Patent Office
Prior art keywords
laundry drier
drier according
laundry
openings
condenser
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EP91113072A
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German (de)
French (fr)
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EP0481178A1 (en
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Zanker GmbH
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Zanker GmbH
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    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00Domestic laundry dryers
    • D06F58/20General details of domestic laundry dryers 
    • D06F58/24Condensing arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/06Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/062Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material the heat-exchange apparatus employing tubular conduits
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02Header boxes; End plates
    • F28F9/04Arrangements for sealing elements into header boxes or end plates
    • F28F9/06Arrangements for sealing elements into header boxes or end plates by dismountable joints
    • F28F9/14Arrangements for sealing elements into header boxes or end plates by dismountable joints by force-joining

Definitions

  • the invention relates to a clothes dryer according to the preamble of patent claim 1.
  • Such tumble dryers have an internal closed air circuit through which heated air is passed through the damp laundry by means of a blower and is then fed to a condenser.
  • the warm, steam-laden air flows through a first cavity, which is penetrated, for example, by a tube block through which a cooling medium, for example tap water or cold ambient air, flows.
  • a cooling medium for example tap water or cold ambient air
  • the condenser is on an outer wall, e.g. arranged in the door.
  • the two cavities can be separated from one another by flat or corrugated walls or they are designed in the manner of a tube capacitor by installing a tube block in the door. The door then forms one cavity and the interior of the tubes forms the other cavity (WO 90/08851 A1).
  • this type of condenser allows easy handling e.g. not for cleaning (fluff removal).
  • U.S. Patent 2,742,708 e.g. a tumble dryer with a housing that includes a drum housing with an inlet for the drying air, an inlet for the cooling air and an outlet for the air mixture, a heater for the drum housing, a rotatable drum in the drum housing, a removable moisture condenser with separate channels for the drying air and the cooling air in the housing under the drum housing, a separately removable condensate pan under the condenser and a fan, the fan circulating drying air and cooling air through the respective inlets separately through the condenser and leading them out of the outlet in the mixed state.
  • US Pat. No. 3,032,887 describes a dryer for wet textile products comprising a housing with a partition, a closed air circulation system and a Cooling air system, an access door in the housing, a scrubbing drum rotatably mounted in the partition for receiving the textiles, the drum having a drilled wall and a flanged opening which is axially aligned with the access door.
  • This dryer further includes an inlet boss attached to the housing adjacent the door and extending toward the drum, the boss having a curved air duct, a cotton filter in the bent duct, and a condenser with a plurality of air ducts running in parallel, non-horizontal and spaced apart and removably disposed between a pair of manifolds.
  • thermal expansion can adversely affect the door construction and the connecting devices to the connecting parts if, for example in a plastic construction with outer skin cooling, the door surface is directly exposed to warm air.
  • the invention has for its object to provide a clothes dryer, the condenser is structurally simple and therefore easy to manufacture in series and inexpensive. Furthermore, the condenser should be versatile in use for different types of dryer and at different locations, and should be easy to handle for the user.
  • the capacitor then forms a separate compact unit, which in turn is made up of modular units that can be used in a variety of ways and that consist exclusively of assembled, for example plugged-in units Plastic parts exist and can be used as a whole in various places in the tumble dryer, for example in the door.
  • the assembly is particularly easy and can be done by machines if necessary.
  • the capacitor is a robust, reliable component that can also be easily removed, cleaned or replaced if necessary.
  • the condenser consists of only three differently shaped, in part multiply existing plastic parts, namely the housing jacket, the identically designed head and foot piece and the likewise identically designed tubes or corrugated walls.
  • the compact structural unit is formed from the connecting pieces and a tube block, while the housing jacket surrounding the block is formed from wall parts of the clothes dryer.
  • the modular units are connected to one another in such a way that the capacitor can be easily pulled out of the device housing or plugged in again. If, for example, a plug connection is selected in this embodiment, additional devices for securing and stabilizing the connection between the tubes and the connecting pieces are provided.
  • the modular design enables efficient production and versatile use of the capacitor.
  • Different capacitors can be used in the construction and dimensions if certain requirements with regard to laundry drying are to be met.
  • the size ratios, the lengths of the tubes, the diameter ratios, the shape of the tube cross-sections, the number of tubes and the size of the flow spaces for the cooling air and / or the steam-laden circulation air could be changed, as could the air flow and the air distribution, in order for the desired drying process to achieve optimal results.
  • these capacitors can be used at different points in the device housing, whereby they always have the same modular units.
  • the condenser can be accommodated in the door without tension even in the event of greater thermal expansion.
  • the condenser is slidably inserted or locked into the side guide devices of the door. It is therefore easily removable for service purposes or for cleaning. Since the condenser can expand under the influence of heat and, according to its loose guidance, it is always tight and free of tension and since the seals are also integrated in the casing of the condenser, there is always a suitable adjustment to the housing openings of the tumble dryer. Tolerances and warpage of device housing parts, e.g. the door, therefore have no influence on the tightness of the capacitor itself and the sealability to the device.
  • Fig. 1 shows schematically the flow of air in the door 1 of a clothes dryer.
  • the warm, steam-laden air enters the door body in the upper region in the direction of the arrow and is deflected downward, coming into extensive contact with the outside of the tubes 2 in the condenser 3.
  • the reference number 4 designates the flow of the cooled air leaving the condenser, which is then passed back into the washing drum 6 via heating elements.
  • cooler outside air enters the door body from below and flows inside the tubes 2 upwards, where it leaves the door through outlet openings (not shown).
  • the movement of the two air streams takes place via fans, not shown, in the counterflow principle.
  • a direct current principle or a cross current principle is also possible here.
  • the condensate formed during the cooling of the steam is collected and removed in a manner known per se.
  • the openings of the door or of the condenser, through which the various air streams are passed when the door is closed, are provided with seals 7, 8 which, when the door is closed, rest against the corresponding openings in the tumble dryer housing.
  • the condenser 3 has on its surface facing the inside of the tumble dryer an opening 10 for the entry of the warm, steam-laden air and an opening 11 for the exit of the cooled, dehumidified air.
  • the opening 10 is covered by a lint filter 12, in front of which there is again a laundry deflector 13. These parts are assembled by detachable snap connections with the interposition of seals.
  • the capacitor 3 including lint filter 12 and laundry deflector 13 is gem.
  • Fig. 2b used in the door body. During installation, it is inserted into the lateral guide devices 9 from above or snapped into place from the front and held there in a sliding and floating manner.
  • the assembly thus completed has three openings that come into contact with the housing of the tumble dryer: the opening 10 for the inlet and the opening 11 for the outlet of the circulated air, and the opening 14 for the inlet of the outside air.
  • This air emerges from the upper ends of the tubes 2 and escapes to the outside through suitable openings near the top edge of the door.
  • the openings 10 and 11 of the compact unit 3 for supplying and discharging the warm, steam-laden air are preferably dimensioned larger than the device-side connection openings, such that the device-side connection openings remain within the area enclosed by the sealing devices when the compact unit 3 moves due to thermal expansion.
  • the construction of the capacitor can be seen in FIG. 3.
  • the housing jacket 15 consists of two spaced wide side walls 16, 17 and two narrow side walls 18, 19. Die As can be seen, narrow side walls are gradually angled or can also be rounded.
  • the housing jacket thus has the shape of a flat sleeve and is formed in one piece from plastic.
  • a head piece 20 and a foot piece 21 are inserted into the open sides of the sleeve.
  • the connection is made by eyelets 22 formed on the free edges of the housing shell 15 and projections 23 formed on the sides of the head and foot piece, so that an easy-to-assemble snap connection is created.
  • the head piece 20 and the foot piece 21 are identical. They have insertion openings 24 in a symmetrical arrangement, into which the ends of the tubes 2 are inserted. 4, the insertion openings have a stepped diameter. In the part receiving the tube end, the diameter corresponds to the outer diameter of the tubes, so that they are held therein with an interference fit. In the subsequent part, the diameter of the insertion opening corresponds to the inside diameter of the tubes 2 and thus forms a stepless transition. In the part that extends further outwards, the insertion openings 24 are then flared, which overall gives a particularly streamlined cross-sectional profile for the incoming cooling air.
  • the modular compact structural unit 25, 25 ' is arranged below the drum 26, 26'.
  • the jacket is not part of the capacitor, but is formed by parts 27, 27 ', 28, 28' of the device housing, into which the capacitor is inserted in a slightly inclined manner.
  • the circulating air is redirected directly down from the drum 25, 25 'to the condenser (internal recirculation) and, after the water has condensed out, is fed back to the drum via the heater 29'.
  • FIGS. 5a and 5b differ in that in FIG. 5a the moisture-laden warm air is passed through the tubes and the external cooling air is conducted around the tubes, while in the example according to FIG. 5b the moisture-laden warm air is directed around the tubes and the external cooling air is passed through the tubes.
  • the heat exchanger block 2 is floating in the side guides 9 so that it can expand in the direction of arrow 29 under heat, without stresses being introduced into the frame structure of the door.
  • the openings 10, 11 of the housing jacket 15 for supplying or discharging the warm, steam-laden air are enclosed by seals 30 and 7, respectively.

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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)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

A laundry drier has a heat exchanger block which serves as a condenser and is e.g. designed as a tube block and consists of versatile modular constructional units which together form a compact constructional unit which in turn can be positioned in a versatile manner and easily removably in the laundry drier. The compact constructional unit is for example inserted into the door, and on guiding through and cooling of the warm air conducted over the moist laundry the steam contained therein is condensed into water. The condenser is designed as a tube condenser and consists of plastic parts interconnected by insertion connections. In a preferred embodiment, the condenser consists of a flat, sleeve-shaped housing (15), the open sides of which are closed by a headpiece and a footpiece (20, 21), between which the tubes are arranged. This unit is mounted as a whole e.g. floating in the door. The laundry drier is formed particularly advantageously from the point of view of manufacturing technology and can be used in and removed from different drier types as a modular constructional unit in an advantageous and service-friendly manner. <IMAGE>

Description

Die Erfindung betrifft einen Wäschetrockner entsprechend dem Oberbegriff des Patentanspruchs 1.The invention relates to a clothes dryer according to the preamble of patent claim 1.

Solche Wäschetrockner weisen einen internen geschlossenen Luftkreislauf auf, durch den aufgeheizte Luft mittels eines Gebläses durch die feuchte Wäsche geleitet und anschließend einem Kondensator zugeführt wird. In diesem Kondensator durchströmt die warme, dampfbeladene Luft einen ersten Hohlraum, der beispielsweise von einem Röhrenblock durchgriffen ist, durch welchen ein Kühlmedium, beispielsweise Leitungswasser oder kalte Umgebungsluft, strömt. Infolge der Abkühlung wird in dem ersten Hohlraum das Wasser aus dem Dampf auskondensiert und abgeleitet. Die aus dem ersten Hohlraum des Kondensators austretende abgekühlte Luft wird dann wieder aufgeheizt und erneut der Wäsche zugeleitet.Such tumble dryers have an internal closed air circuit through which heated air is passed through the damp laundry by means of a blower and is then fed to a condenser. In this condenser, the warm, steam-laden air flows through a first cavity, which is penetrated, for example, by a tube block through which a cooling medium, for example tap water or cold ambient air, flows. As a result of the cooling, the water is condensed out of the steam in the first cavity and drained off. The cooled air emerging from the first cavity of the condenser is then heated again and fed to the laundry again.

Für die Anbringung des Kondensators in dem Gehäuse des Wäschetrockners gibt es verschiedene Möglichkeiten. Bei einem bekannten Wäschetrockner ist zum Zweck einer besonders raumsparenden Bauweise der Kondensator an einer Außenwand, z.B. in der Tür, angeordnet. Die beiden Hohlräume können durch ebene oder gewellte Wände voneinander getrennt sein oder sie sind nach Art eines Röhrenkondensators gestaltet, indem in die Tür ein Röhrenblock eingebaut ist. Die Tür bildet dann den einen Hohlraum und das Innere der Röhren den anderen Hohlraum (WO 90/08851 A1).There are various options for mounting the condenser in the housing of the tumble dryer. In a known tumble dryer, the condenser is on an outer wall, e.g. arranged in the door. The two cavities can be separated from one another by flat or corrugated walls or they are designed in the manner of a tube capacitor by installing a tube block in the door. The door then forms one cavity and the interior of the tubes forms the other cavity (WO 90/08851 A1).

Da das Kondensatorgehäuse Teil der Tür bzw. einer Außenwand des Wäschetrockners ist und die Röhren nicht ohne weiteres herausgenommen werden können, läßt dieser Kondensatortyp eine einfache Handhabung z.B. für eine Reinigung (Flusenentfernung) nicht zu.Since the condenser housing is part of the door or an outer wall of the tumble dryer and the tubes cannot be easily removed, this type of condenser allows easy handling e.g. not for cleaning (fluff removal).

Aus dem Stand der Technik sind bereits Wäschetrockner bekannt, bei denen die Kondensatoren herausnehmbar sind. Die US-Patentschrift 2 742 708 offenbart z.B. einen Wäschetrockner mit einem Gehäuse, das ein Trommelgehäuse mit einem Einlaß für die Trocknungsluft, einem Einlaß für die Kühlungsluft und einem Auslaß für das Luftgemisch, eine Heizung für das Trommelgehäuse, eine drehbare Trommel in dem Trommelgehäuse, einen entfernbaren Feuchtigkeitskondensator mit getrennten Kanälen für die Trocknungsluft und die Kühlungsluft in dem Gehäuse unter dem Trommelgehäuse, eine separat entfernbare Kondensatpfanne unter dem Kondensator und einen Ventilator umfaßt, wobei der Ventilator Trocknungsluft und Kühlungsluft durch die jeweiligen Einlässe getrennt durch den Kondensator zirkuliert und im gemischten Zustand aus dem Auslaß herausführt.Tumble dryers in which the capacitors can be removed are already known from the prior art. U.S. Patent 2,742,708, e.g. a tumble dryer with a housing that includes a drum housing with an inlet for the drying air, an inlet for the cooling air and an outlet for the air mixture, a heater for the drum housing, a rotatable drum in the drum housing, a removable moisture condenser with separate channels for the drying air and the cooling air in the housing under the drum housing, a separately removable condensate pan under the condenser and a fan, the fan circulating drying air and cooling air through the respective inlets separately through the condenser and leading them out of the outlet in the mixed state.

Die amerikanische Patentschrift US 3 032 887 beschreibt einen Trockner für nasse Textilerzeugnisse umfassend ein Gehäuse mit einer Trennwand, einem geschlossenen Umluftsystem und einem Kühlungsluftsystem, einer Zugangstür in dem Gehäuse, einer drehbar in der Trennwand gelagerten Scheuertrommel zur Aufnahme der Textilien, wobei die Trommel eine mit Bohrungen versehene Wandung und eine angeflanschte Öffnung aufweist, die axial mit der Zugangstür ausgerichtet ist. Ferner beinhaltet dieser Trockner einen Einlaßansatz, der benachbart der Tür an dem Gehäuse befestigt ist und sich zur Trommel hin erstreckt, wobei der Ansatz einen gebogenen Umluftkanal, einen Baumwollfilter in dem gebogenen Kanal und einen Kondensator mit einer Vielzahl von Umluftkanälen aufweist, die in paralleler, nicht waagerechter und beabstandet angeordneter Weise und entfernbar zwischen einem Paar von Verteilerköpfen angeordnet sind.US Pat. No. 3,032,887 describes a dryer for wet textile products comprising a housing with a partition, a closed air circulation system and a Cooling air system, an access door in the housing, a scrubbing drum rotatably mounted in the partition for receiving the textiles, the drum having a drilled wall and a flanged opening which is axially aligned with the access door. This dryer further includes an inlet boss attached to the housing adjacent the door and extending toward the drum, the boss having a curved air duct, a cotton filter in the bent duct, and a condenser with a plurality of air ducts running in parallel, non-horizontal and spaced apart and removably disposed between a pair of manifolds.

Bei diesen beiden Patentschriften können Wärmedehnungen die Türkonstruktion sowie die Verbindungseinrichtungen zu den Anschlußteilen ungünstig beeinflussen, wenn beispielsweise bei einer Kunststoffkonstruktion mit Außenhautkühlung eine direkte Beaufschlagung der Türfläche mit warmer Luft erfolgt.In these two patents, thermal expansion can adversely affect the door construction and the connecting devices to the connecting parts if, for example in a plastic construction with outer skin cooling, the door surface is directly exposed to warm air.

Der Erfindung liegt die Aufgabe zugrunde, einen Wäschetrockner anzugeben, dessen Kondensator konstruktiv einfach aufgebaut und daher in Serie leicht zu fertigen und preiswert ist. Ferner soll der Kondensator für unterschiedliche Trocknertypen und an verschiedenen Stellen derselben vielseitig einsetzbar sein und eine leichte Handhabung für den Benutzer ermöglichen.The invention has for its object to provide a clothes dryer, the condenser is structurally simple and therefore easy to manufacture in series and inexpensive. Furthermore, the condenser should be versatile in use for different types of dryer and at different locations, and should be easy to handle for the user.

Die Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen ergeben sich aus den Unteransprüchen.The object is achieved by the characterizing features of claim 1. Advantageous refinements result from the subclaims.

Der Kondensator bildet hiernach eine gesonderte kompakte Baueinheit, die ihrerseits aus vielseitig verwendbaren modularen Baueinheiten aufgebaut ist und die ausschließlich aus zusammengesetzten, z.B. gesteckten Kunststoffteilen besteht und als ganzes an verschiedenen Stellen in den Wäschetrockner, beispielsweise in die Tür, eingesetzt werden kann Die Montage ist dadurch besonders einfach und kann ggfs. durch Automaten erfolgen. Der Kondensator ist andererseits ein robustes, zuverlässiges Bauteil, das bei Bedarf auch leicht wieder ausgebaut, gereinigt oder ausgetauscht werden kann.The capacitor then forms a separate compact unit, which in turn is made up of modular units that can be used in a variety of ways and that consist exclusively of assembled, for example plugged-in units Plastic parts exist and can be used as a whole in various places in the tumble dryer, for example in the door. The assembly is particularly easy and can be done by machines if necessary. On the other hand, the capacitor is a robust, reliable component that can also be easily removed, cleaned or replaced if necessary.

In einer bevorzugten Ausführung besteht der Kondensator aus lediglich drei unterschiedlich geformten, zum Teil mehrfach vorhandenen Kunststoffteilen, nämlich dem Gehäusemantel, dem identisch ausgebildeten Kopf- und Fußstück und den ebenfalls identisch ausgebildeten Röhren oder gewellten Wänden.In a preferred embodiment, the condenser consists of only three differently shaped, in part multiply existing plastic parts, namely the housing jacket, the identically designed head and foot piece and the likewise identically designed tubes or corrugated walls.

Es ist aber auch möglich, daß die kompakte Baueinheit aus den Anschlußstücken und einem Röhrenblock gebildet ist, während der den Block umschließende Gehäusemantel von Wandteilen des Wäschetrockners gebildet ist. Dabei sind die modularen Baueinheiten untereinander derart verbunden, daß der Kondensator problemlos aus dem Gerätegehäuse herausgzogen oder wieder eingesteckt werden kann. Wird bei dieser Ausführung beispielsweise eine Steckvorbindung gewählt, sind zusätzliche Einrichtungen zur Sicherung und Stabilisierung dar Verbindung zwischen den Röhren und den Anschlußstücken vorgesehen.However, it is also possible for the compact structural unit to be formed from the connecting pieces and a tube block, while the housing jacket surrounding the block is formed from wall parts of the clothes dryer. The modular units are connected to one another in such a way that the capacitor can be easily pulled out of the device housing or plugged in again. If, for example, a plug connection is selected in this embodiment, additional devices for securing and stabilizing the connection between the tubes and the connecting pieces are provided.

Die modulartige Ausgestaltung ermöglicht eine rationelle Herstellung und einen vielseitigen Einsatz des Kondensators. So können im Aufbau und in den Abmessungen unterschiedliche Kondensatoren Verwendung finden, wenn bestimmte Anforderungen in Bezug auf die Wäschetrocknung erfüllt werden sollen. Beispielsweise ließen sich die Größenverhältnisse, die Längen der Röhren, Durchmesserverhältnisse, die Form der Röhrenquerschnitte, die Anzahl der Röhren und die Größe der Strömungsräume für die Kühlluft und /oder die dampfbeladene Zirkulationsluft verändern ebenso wie die Luftführung und die Luftverteilung, um für den gewünschten Trocknungsvorgang optimale Ergebnisse zu erzielen. Diese Kondensatoren können je nach Trocknertyp an unterschiedlichen Stellen des Gerätegehäuses eingesetzt werden, wobei sie immer dieselben modularen Baueinheiten besitzen. Da die warme Luft die Außenhaut bzw. die Tür nicht mehr direkt beaufschlagt, sondern die Luft im Kondensator umgelenkt wird, wird ferner eine Deformation der Außenhaut bzw. der Türaußenwand durch Wärme vermieden. Infolge der vorteilhaften schwimmenden Lagerung des Kondensators kann dieser selbst bei größeren Wärmeausdehnungen spannungsfrei in der Tür aufgenommen werden. Beim Einbau wird der Kondensator in seitliche Führungseinrichtungen der Tür gleitend eingeführt oder eingerastet. Er ist daher zu Servicezwecken oder zum Reinigen leicht herausnehmbar. Da sich der Kondensator unter Wärmebeeinflussung ausdehnen kann und entsprechend seiner losen Führung immer dicht und spannungsfrei ist und da außerdem die Dichtungen im Gehäusemantel des Kondensators integriert sind, ist immer eine geeignete Justierung gegenüber den Gehäuseöffnungen des Wäschetrockners gegeben. Toleranzen und Verwerfungen von Gerätegehäuseteilen z.B.der Tür haben daher keinen Einfluß auf die Dichtheit des Kondensators selbst und die Dichtfähigkeit zum Gerät.The modular design enables efficient production and versatile use of the capacitor. Different capacitors can be used in the construction and dimensions if certain requirements with regard to laundry drying are to be met. For example, the size ratios, the lengths of the tubes, the diameter ratios, the shape of the tube cross-sections, the number of tubes and the size of the flow spaces for the cooling air and / or the steam-laden circulation air could be changed, as could the air flow and the air distribution, in order for the desired drying process to achieve optimal results. Depending on the type of dryer, these capacitors can be used at different points in the device housing, whereby they always have the same modular units. Since the warm air no longer acts directly on the outer skin or the door, but instead deflects the air in the condenser, deformation of the outer skin or the outer door wall by heat is avoided. As a result of the advantageous floating mounting of the condenser, the condenser can be accommodated in the door without tension even in the event of greater thermal expansion. During installation, the condenser is slidably inserted or locked into the side guide devices of the door. It is therefore easily removable for service purposes or for cleaning. Since the condenser can expand under the influence of heat and, according to its loose guidance, it is always tight and free of tension and since the seals are also integrated in the casing of the condenser, there is always a suitable adjustment to the housing openings of the tumble dryer. Tolerances and warpage of device housing parts, e.g. the door, therefore have no influence on the tightness of the capacitor itself and the sealability to the device.

Weitere Einzelheiten ergeben sich aus der nachfolgenden Beschreibung eines bevorzugten Ausführungsbeispiels anhand der Zeichnung. In dieser zeigen:

Fig. 1
einen Vertikalschnitt durch den Türbereich eines Wäschetrockners,
Fig. 2a
eine Ansicht der Tür mit auseinandergezogener Darstellung der Teile,
Fig. 2b
eine Ansicht der Tür im zusammengesetzten Zustand,
Fig. 3
eine auseinandergezogene Darstellung des Kondensators,
Fig. 4
einen Teilschnitt durch das Fußstück, und
Fig. 5a, b
weitere Ausfüphrungsbeispiele mit einer unterhalb der Trommel angeordneten modularen Baueinheit, und
Fig.6
eine perspektivische, schematische Ansicht der in den Türrahmen eingesetzten modularen Baueinheit gemäß Fig.3.
Further details emerge from the following description of a preferred exemplary embodiment with reference to the drawing. In this show:
Fig. 1
a vertical section through the door area of a clothes dryer,
Fig. 2a
a view of the door with the parts exploded,
Fig. 2b
a view of the door in the assembled state,
Fig. 3
an exploded view of the capacitor,
Fig. 4
a partial section through the foot piece, and
5a, b
further exemplary embodiments with a modular unit arranged below the drum, and
Fig. 6
a perspective, schematic view of the modular assembly used in the door frame according to Figure 3.

Fig. 1 zeigt schematisch die Führung der Luftströme in der Tür 1 eines Wäschetrockners. Die warme, dampfbeladene Luft tritt im oberen Bereich in Pfeilrichtung in den Türkörper ein und wird nach unten abgelenkt, wobei sie großflächig in Kontakt mit den Außenseiten der Röhren 2 in dem Kondensator 3 gelangt. Die Bezugsziffer 4 bezeichnet den Strom der den Kondensator verlassenden, abgekühlten Luft, die anschließend im Kreislauf über Heizelemente in die Wäschetrommel 6 zurück geleitet wird. Mit dem Luftstrom 5 tritt kühlere Außenluft von unten in den Türkörper ein und strömt innerhalb der Röhren 2 nach oben, wo sie die Tür durch nicht dargestellte Austrittsöffnungen verläßt. Die Bewegung der beiden Luftströme erfolgt über nicht dargestellte Gebläse im Gegenstromprinzip. Es ist hier aber auch ein Gleichstromprinzip oder ein Querstromprinzip möglich. Das bei der Abkühlung des Dampfes entstehende Kondenswasser wird in an sich bekannter Weise aufgefangen und abgeführt.Fig. 1 shows schematically the flow of air in the door 1 of a clothes dryer. The warm, steam-laden air enters the door body in the upper region in the direction of the arrow and is deflected downward, coming into extensive contact with the outside of the tubes 2 in the condenser 3. The reference number 4 designates the flow of the cooled air leaving the condenser, which is then passed back into the washing drum 6 via heating elements. With the air flow 5, cooler outside air enters the door body from below and flows inside the tubes 2 upwards, where it leaves the door through outlet openings (not shown). The movement of the two air streams takes place via fans, not shown, in the counterflow principle. However, a direct current principle or a cross current principle is also possible here. The condensate formed during the cooling of the steam is collected and removed in a manner known per se.

Die Öffnungen der Tür bzw. des Kondensators, durch die bei geschlossener Tür die verschiedenen Luftströme geleitet werden, sind mit Dichtungen 7, 8 versehen, die sich bei geschlossener Tür an die korrespondierenden Öffnungen des Wäschetrocknergehäuses anlegen.The openings of the door or of the condenser, through which the various air streams are passed when the door is closed, are provided with seals 7, 8 which, when the door is closed, rest against the corresponding openings in the tumble dryer housing.

Die Fig. 2a und 2b zeigen die Tür, die als einstückiger oder zusammengesetzter Kunststoffkörper ausgebildet ist. Die notwendigen Beschläge sind aus Gründen der besseren Übersichtlichkeit nicht dargestellt. Der Kondensator 3 weist auf seiner dem Inneren des Wäschetrockners zugewandten Fläche eine Öffnung 10 für den Eintritt der warmen, dampfbeladenen Luft und eine Öffnung 11 für den Austritt der abgekühlten, entfeuchteten Luft auf. Die Öffnung 10 ist durch ein Flusenfilter 12 abgedeckt, vor dem sich wiederum ein Wäscheabweiser 13 befindet. Diese Teile sind durch lösbare Schnappverbindungen unter Zwischenlage von Dichtungen zusammengesetzt.2a and 2b show the door, which is designed as a one-piece or composite plastic body. The necessary Fittings are not shown for reasons of clarity. The condenser 3 has on its surface facing the inside of the tumble dryer an opening 10 for the entry of the warm, steam-laden air and an opening 11 for the exit of the cooled, dehumidified air. The opening 10 is covered by a lint filter 12, in front of which there is again a laundry deflector 13. These parts are assembled by detachable snap connections with the interposition of seals.

Der Kondensator 3 einschließlich Flusenfilter 12 und Wäscheabweiser 13 ist gem. Fig. 2b in den Türkörper eingesetzt. Er wird beim Einbau von oben in die seitlichen Führungseinrichtungen 9 eingeführt bzw. von vorn eingerastet und in diesen gleitend und schwimmend gehalten.The capacitor 3 including lint filter 12 and laundry deflector 13 is gem. Fig. 2b used in the door body. During installation, it is inserted into the lateral guide devices 9 from above or snapped into place from the front and held there in a sliding and floating manner.

Die so komplettierte Baueinheit weist drei gegen das Gehäuse des Wäschetrockners zur Anlage kommende Öffnungen auf: die Öffnung 10 für den Eintritt und die Öffnung 11 für den Austritt der im Kreislauf geführten Luft sowie die Öffnung 14 für den Eintritt der Außenluft. Diese Luft tritt aus den oberen Enden der Röhren 2 wieder aus und entweicht durch geeignete Öffnungen in der Nähe der Türoberkante ins Freie. Dabei sind die Öffnungen 10 und 11 der kompakten Baueinheit 3 zur Zuleitung und Ableitung der warmen, dampfbeladenen Luft vorzugsweise größer bemessen als die geräteseitigen Anschlußöffnungen, derart, daß die geräteseitigen Anschlußöffnungen bei wärmdehnungsbedingter Bewegung der kompakten Baueinheit 3 innerhalb des von den Dichtungseinrichtungen umschlossenen Bereiches verbleiben.The assembly thus completed has three openings that come into contact with the housing of the tumble dryer: the opening 10 for the inlet and the opening 11 for the outlet of the circulated air, and the opening 14 for the inlet of the outside air. This air emerges from the upper ends of the tubes 2 and escapes to the outside through suitable openings near the top edge of the door. The openings 10 and 11 of the compact unit 3 for supplying and discharging the warm, steam-laden air are preferably dimensioned larger than the device-side connection openings, such that the device-side connection openings remain within the area enclosed by the sealing devices when the compact unit 3 moves due to thermal expansion.

Der Aufbau des Kondensators ist aus Fig. 3 ersichtlich. Der Gehäusemantel 15 besteht aus zwei beabstandeten breiten Seitenwänden 16, 17 und aus zwei schmalen Seitenwänden 18, 19. Die schmalen Seitenwände sind wie ersichtlich stufenweise abgewinkelt oder können auch abgerundet sein. Der Gehäusemantel weist somit die Form einer flachen Hülse auf und ist einstückig aus Kunststoff geformt. In die offenen Seiten der Hülse sind ein Kopfstück 20 und ein Fußstück 21 eingesetzt. Die Verbindung erfolgt dabei durch an den freien Kanten des Gehäusemantels 15 angeformte Ösen 22 und an den Seiten des Kopf- und des Fußstücks ausgebildete Vorsprünge 23, so daß eine leicht zu montierende Schnappverbindung geschaffen ist.The construction of the capacitor can be seen in FIG. 3. The housing jacket 15 consists of two spaced wide side walls 16, 17 and two narrow side walls 18, 19. Die As can be seen, narrow side walls are gradually angled or can also be rounded. The housing jacket thus has the shape of a flat sleeve and is formed in one piece from plastic. A head piece 20 and a foot piece 21 are inserted into the open sides of the sleeve. The connection is made by eyelets 22 formed on the free edges of the housing shell 15 and projections 23 formed on the sides of the head and foot piece, so that an easy-to-assemble snap connection is created.

Das Kopfstück 20 und das Fußstück 21 sind identisch ausgebildet. Sie weisen in symmetrischer Anordnung Einstecköffnungen 24 auf, in die die Enden der Röhren 2 eingesteckt sind. Gemäß Fig. 4 haben die Einstecköffnungen einen abgestuften Durchmesser. In dem das Röhrenende aufnehmenden Teil entspricht der Durchmesser dem Außendurchmesser der Röhren, so daß diese mit Preßsitz darin gehalten sind. In dem anschließenden Teil entspricht der Durchmesser der Einstecköffnung dem Innendurchmesser der Röhren 2 und bildet damit einen stufenlosen Übergang. In dem sich weiter nach außen erstreckenden Teil sind dann die Einstecköffnungen 24 konisch erweitert, wodurch insgesamt ein besonders strömungsgünstiger Querschnittsverlauf für die eintretende Kühlluft gegeben ist.The head piece 20 and the foot piece 21 are identical. They have insertion openings 24 in a symmetrical arrangement, into which the ends of the tubes 2 are inserted. 4, the insertion openings have a stepped diameter. In the part receiving the tube end, the diameter corresponds to the outer diameter of the tubes, so that they are held therein with an interference fit. In the subsequent part, the diameter of the insertion opening corresponds to the inside diameter of the tubes 2 and thus forms a stepless transition. In the part that extends further outwards, the insertion openings 24 are then flared, which overall gives a particularly streamlined cross-sectional profile for the incoming cooling air.

Bei dem in den Fig. 5a, b gezeigten Ausführungsbeispielen ist die modulare kompakte Baueinheit 25, 25'unterhalb der Trommel 26, 26' angeordnet. In diesem Fall ist z.B. der Mantel nicht Teil des Kondensators, sondern wird von Teilen 27, 27', 28, 28' des Gerätegehäuses gebildet, in die der Kondensator etwas geneigt liegend eingeschoben ist. Die Umluft wird aus der Trommel 25, 25' dierekt nach unten zum Kondensator umgeleitet (innere Rückführung) und nach dem Auskondensieren des Wassers über die Heizung 29' wieder der Trommel zugeführt. Die beiden Beispiele der Fig.5a und 5b unterscheiden sich dadurch, daß bei Fig 5a die feuchtigkeitsbeladene warme Luft durch die Röhren hindurch und die äußere Kühlluft um die Röhren herumgeleitet wird, während bei dem Beispiel gemäß Fig 5b die feuchtigkeitsbeladene warme Luft um die Röhren herum und die äußere Kühlluft durch die Röhren hindurchgeleitet wird.In the exemplary embodiments shown in FIGS. 5a, b, the modular compact structural unit 25, 25 'is arranged below the drum 26, 26'. In this case e.g. the jacket is not part of the capacitor, but is formed by parts 27, 27 ', 28, 28' of the device housing, into which the capacitor is inserted in a slightly inclined manner. The circulating air is redirected directly down from the drum 25, 25 'to the condenser (internal recirculation) and, after the water has condensed out, is fed back to the drum via the heater 29'. The two examples in FIGS. 5a and 5b differ in that in FIG. 5a the moisture-laden warm air is passed through the tubes and the external cooling air is conducted around the tubes, while in the example according to FIG. 5b the moisture-laden warm air is directed around the tubes and the external cooling air is passed through the tubes.

Bei der in der Fig.6 dargestellten Ansicht ist der Wärmetauscherblock 2 in den seitlichen Führungen 9 schwimmend gelagert, so daß er sich in Richtung des Pfeiles 29 unter Wärme ausdehnen kann, ohne daß Spannungen in die Rahmenkonstruktion der Tür eingeleitet werden. Die Öffnungen 10, 11 des Gehäusemantels 15 zur Zuleitung bzw. Ableitung der warmen, dampfbeladenen Luft sind von Dichtungen 30 bzw. 7 umschlossen.In the view shown in Figure 6, the heat exchanger block 2 is floating in the side guides 9 so that it can expand in the direction of arrow 29 under heat, without stresses being introduced into the frame structure of the door. The openings 10, 11 of the housing jacket 15 for supplying or discharging the warm, steam-laden air are enclosed by seals 30 and 7, respectively.

Claims (24)

  1. Laundry drier with an appliance housing, the interior space of which is accessible in order to receive laundry through a door (1), and with a condenser (3) removably insserted in the appliance housing and comprising a first cavity for guiding the hot steam-laden air and a second cavity for guiding a coolant (5), the cavities being formed by a heat-exchanger block, for example, by a block of tubes (2) through which one medium (4) flows and around which the other medium (5) flows, characterized in that the condenser (3) is composed of modular units (2, 15, 20, 21) which are assembled by push-in and/or snap-in connections and which together can form condensers of different construction and measurements.
  2. Laundry drier according to Claim 1, characterized in that the compact unit (3) comprises a casing which encloses the heat-exchanger block (2) and defines the first cavity, and in which openings (10, 11) are provided for the supply and discharge of the hot, steam-laden air, the casing being closed at its open ends by connecting elements (20, 21) of the heat-exchanger block.
  3. Laundry drier according to Claim 1, characterized in that the compact unit (3) includes the heat-exchanger block (2) and connecting elements (20, 21) provided at its ends, and in that it is formed so that it can be pushed into a casing of the laundry drier with openings for the supply and discharge of the hot, steam-laden air.
  4. Laundry drier according to Claim 2 or Claim 3, characterized in that the casing (15) is closed at its ends by a unitary top element (20) and a unitary base element (21) which, with a tube block, comprise connecting openings (24) adapted to the number and cross-section of the tubes (2).
  5. Laundry drier according to Claim 4, characterized in that the top and base elements (20, 21) are identical.
  6. Laundry drier according to any one of the preceding Claims 1 to 4, characterized in that the top and/or the base element (20, 21) comprise additional functional elements such as inlet and outlet ducts for the cooling air or steam-laden circulation air.
  7. Laundry drier according to Claim 2, characterized in that the casing (15) is composed of two wide, spaced-apart side walls (16, 17) and two narrow side walls (18, 19) formed integrally therewith, and in that it is closed on the remaining sides by the top and base elements (20, 21).
  8. Laundry drier according to any one of the preceding claims, characterized in that the openings (10, 11) for the supply and discharge of the hot, steam-laden air are disposed in the wide side wall (16) of the casing facing the interior of the laundry drier.
  9. Laundry drier according to any one of the preceding claims, characterized in that sealing devices are provided on the edges of the openings (10, 11) for the supply and discharge of the hot, steam-laden air.
  10. Laundry drier according to any one of the preceding claims, characterized in that the modular units (2, 15, 20, 21) of the compact unit (3) are composed of plastics material.
  11. Laundry drier according to any one of the preceding claims, characterized in that, in a tube block without a casing, the base and top elements (20, 21) are held together in their position by additional connecting stays.
  12. Laundry drier according to any one of the preceding claims, characterized in that recesses (22) are formed on the free edges of one module, particularly the casing (15), and in that the associated module or modules, particularly the top and base elements (20, 21), comprise wedge-shaped projections (23) which engage in the recesses in the manner of a snap-closure.
  13. Laundry drier according to any one of the preceding claims, characterized in that each of the push-in openings (24) formed in the top element and in the base element (20, 21) has a stepped diameter which corresponds to the outside diameter of the tubes (2) in the portion receiving the tube ends and to the inside diameter of the tubes in the connecting portion.
  14. Laundry drier according to any one of the preceding claims, characterized in that portions of the push-in openings (24) adjacent the inlet region in the top element or the foot element (20, 21), respectively, are widened to favour the flow.
  15. Laundry drier according to Claim 1 or Claim 2, characterized in that the compact unit (3) is disposed in a wall portion of the appliance housing, particularly the door (1).
  16. Laundry drier according to Claim 1 or Claim 3, characterized in that the compact unit (3) is disposed in the top or bottom portion of the appliance housing.
  17. Laundry drier according to any one of the preceding claims, characterized in that the door body is formed as a moulded plastics body in which the compact unit (3) is fitted in a floating manner.
  18. Laundry drier according to any one of the preceding claims, characterized in that the door body comprises a frame with lateral guides for receiving the narrow side walls of the casing (15) of the compact unit (3).
  19. Laundry drier according to any one of the preceding claims, characterized in that the openings (10, 11) of the compact unit (3) for the supply and discharge of the hot, steam-laden air are of larger dimensions than the connecting openings on the appliance side, so that, with movement owing to thermal expansion of the compact unit, the connecting openings on the appliance side remain inside the region enclosed by the sealing devices.
  20. Laundry drier according to any one of the preceding claims, characterized in that the top and base elements (20, 21) are connected, respectively, to a supply tube and to a discharge tube for the external air which serves as the coolant.
  21. Laundry drier according to any one of the preceding claims, characterized in that a fluff filter (12) is disposed upstream of the inlet opening (10) of the casing (15).
  22. Laundry drier according to Claim 21, characterized in that a laundry deflector (13) is disposed upstream of the fluff filter (12).
  23. Laundry drier according to any one of the preceding claims, characterized in that the base element (21) is connected to the supply tube for the external air.
  24. Laundry drier according to any one of the preceding claims, characterized in that the door (1) comprises, in the region of the upper edge, outlet openings for the external air led through the tubes (2).
EP91113072A 1990-10-17 1991-08-02 Laundry dryer with a condenser Expired - Lifetime EP0481178B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4032904 1990-10-17
DE4032904A DE4032904A1 (en) 1990-10-17 1990-10-17 LAUNDRY DRYER

Publications (2)

Publication Number Publication Date
EP0481178A1 EP0481178A1 (en) 1992-04-22
EP0481178B1 true EP0481178B1 (en) 1995-11-02

Family

ID=6416434

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91113072A Expired - Lifetime EP0481178B1 (en) 1990-10-17 1991-08-02 Laundry dryer with a condenser

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EP (1) EP0481178B1 (en)
AT (1) ATE129760T1 (en)
DE (2) DE4032904A1 (en)

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DE4135845A1 (en) * 1991-10-31 1993-05-06 Bauknecht Hausgeraete Gmbh, 7000 Stuttgart, De LAUNDRY DRYER
IT1254215B (en) * 1992-02-25 1995-09-14 Merloni Antonio Spa WATER ECONOMIZER DEVICE FOR WASHING MACHINES LINEN DRYING MACHINES
DE4304072C2 (en) * 1993-02-11 1995-05-11 Bauknecht Hausgeraete Heat exchangers, in particular for tumble dryers
SE503689C2 (en) * 1994-04-15 1996-08-05 Electrolux Ab Dryer with condenser
DE29618878U1 (en) * 1996-10-30 1996-12-19 Rehau Ag + Co, 95111 Rehau Heat exchanger
US6964297B1 (en) 1998-07-14 2005-11-15 L & M Radiator, Inc. Removable tube heat exchanger and header plate
EP1097347B1 (en) * 1998-07-14 2003-10-01 L.&amp; M. RADIATOR, INC. Removable tube heat exchanger and header plate
FR2785375B1 (en) * 1998-10-28 2001-01-12 Valeo Thermique Moteur Sa HEAT EXCHANGER WITH TUBE BEAM AND COLLECTORS IN THERMOPLASTIC MATERIAL
WO2000045105A1 (en) 1999-01-29 2000-08-03 L & M Radiator, Inc. Support for heat exchanger tubes
US7036243B2 (en) * 2003-12-22 2006-05-02 Lg Electronics Inc. Laundry dryer and condenser assembly thereof
WO2007023081A1 (en) * 2005-08-23 2007-03-01 BSH Bosch und Siemens Hausgeräte GmbH Device comprising a functional component, particularly in a household appliance
DE102006005809B4 (en) * 2006-02-08 2012-05-24 BSH Bosch und Siemens Hausgeräte GmbH Condenser dryer comprising a capacitor housing with at least one thin wall
DE102008054104A1 (en) * 2008-10-31 2010-05-06 Herbert Kannegiesser Gmbh Method and device for treating the exhaust air from heated laundry machines
US11697901B2 (en) 2020-01-09 2023-07-11 Whirlpool Corporation Door assembly for a laundry treating appliance
CN112302486B (en) * 2020-03-17 2022-06-21 无锡小天鹅电器有限公司 Door body structure and clothing nursing device
CN115404681A (en) * 2021-05-28 2022-11-29 Bsh家用电器有限公司 Laundry treatment device comprising an active cooling element

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US3032887A (en) * 1958-05-02 1962-05-08 Gen Motors Corp Clothes drier
DE8017935U1 (en) * 1980-07-04 1980-10-02 Sueddeutsche Kuehlerfabrik Julius Fr. Behr Gmbh & Co Kg, 7000 Stuttgart Air-cooled condensation heat dryer
US5136792A (en) * 1989-02-03 1992-08-11 Zanket Gmbh Laundry dryer

Also Published As

Publication number Publication date
ATE129760T1 (en) 1995-11-15
DE59106820D1 (en) 1995-12-07
DE4032904A1 (en) 1992-04-23
EP0481178A1 (en) 1992-04-22

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