EP2112263B1 - Washer-dryer with a drum housing with a water entry opening - Google Patents

Washer-dryer with a drum housing with a water entry opening Download PDF

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Publication number
EP2112263B1
EP2112263B1 EP09100229A EP09100229A EP2112263B1 EP 2112263 B1 EP2112263 B1 EP 2112263B1 EP 09100229 A EP09100229 A EP 09100229A EP 09100229 A EP09100229 A EP 09100229A EP 2112263 B1 EP2112263 B1 EP 2112263B1
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EP
European Patent Office
Prior art keywords
drum
laundry
drum housing
water inlet
water
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EP09100229A
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German (de)
French (fr)
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EP2112263A1 (en
Inventor
Edwin Bolduan
Dieter Schröder
Andreas Stolze
Joachim Wüstemann
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BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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Publication of EP2112263A1 publication Critical patent/EP2112263A1/en
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    • 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
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • D06F58/04—Details 
    • 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

Definitions

  • the invention relates to a washer-dryer with a laundry drum rotatably mounted in a drum housing and a water inlet opening provided in a wall of the drum housing for the entry of cooling and / or condensate water into the drum housing.
  • Prior art washer-dryers show the documents WO 2006/029953 WO 2007/138019 A1 such as EP 0 636 732 B1 .
  • DE 44 27 361 A1 and DE 195 22 307 C2 The three last-mentioned documents primarily each describe a washer-dryer which has a water-cooled condenser for drying wet laundry by means of a circulating process air stream.
  • a washer-dryer has a drum housing together with a rotatable drum for receiving the laundry, facilities for supplying and discharging water and laundry treatment means, etc.
  • a process air circuit is formed in the washer-dryer by a fan, heating channel, drum with laundry load and condenser to dry the washed laundry by a process air flow in the process air circuit.
  • the condenser can be water or air cooled.
  • the air inlet into the drum is usually in the door area above the sight glass, and the air outlet from the drum is located on a wall, in particular on the drum shell or in the drum rear wall.
  • the air outlet opening is at the same time condensate and / or cooling water inlet opening in the drum. From the drum housing periodically water is pumped out during a drying process. Because of the construction space, an air-water countercurrent with strong turbulences is created in this air outlet opening.
  • the distances between the laundry drum and the drum housing are minimized even in a washer-dryer;
  • the drum and the laundry to be dried therein can be moistened unintentionally by water swirls of the condensate water in the area of the air outlet opening.
  • Such undesired moistening worsens the consumption values of the drying process, since the distributed water for re-discharging through the process air flow in particular again must be evaporated.
  • the vortex formation can be reduced by a uniform enlargement of the outlet opening.
  • the washer-dryer is provided with a laundry drum (inner drum) mounted rotatably in a drum housing (outer drum, tub) and a water inlet opening provided in a wall of the drum housing for entry of cooling water and / or condensate water;
  • the wall has a recess which extends from the water inlet opening approximately perpendicular to the wall and outwardly of the drum housing.
  • According to the invention does not penetrate water from the water inlet opening in a straight path in the drum housing, but it must first flow through the return. As a result, the formation of drops and splashes in the area of the inner drum and any laundry there in the drum housing is avoided.
  • the wall with the recess is preferably a rear wall, and the recess extends in the direction of a jacket of the drum housing.
  • the rear wall preferably has a recess which extends from the water inlet opening in the direction of the jacket of the drum housing or in the direction of the edge of the rear wall.
  • the recess can also be regarded as an extension of the water inlet opening in the direction of the jacket of the rear wall.
  • a washer-dryer with a distance-optimized air outlet region in the drum rear wall reduces the rewetting of the laundry item to be dried by swirling water and is thus improved in terms of the expenditure on energy and time for the drying process.
  • the water inlet opening in the drum housing simultaneously corresponds to the air outlet opening in a process air duct.
  • the water inlet opening and the air outlet opening can be completely or partially separated from one another.
  • the rear wall extends outward along a radial direction, for example, along an imaginary line that passes approximately through the center of the rear wall and the center of the air inlet opening.
  • the return is designed mirror-symmetrically with respect to this line or direction.
  • the recess extends at least to a radial position which is opposite a jacket of the laundry drum, in particular, if the recess further extends to a shell of the drum housing.
  • the recess at least partially has a tapered (funnel-shaped) shape starting from the water inlet opening, in particular a funnel shape extending over the majority of the length or the entire length of the recess. This will reduce the width or cross-sectional area of the funnel.
  • the recess has a tapering in plan view from the front at least in sections form.
  • This shape may comprise, at least in sections or regions, a curved or straight contour, in particular a tulip-shaped contour.
  • the recess has a cross-sectionally at least partially tapered shape.
  • This shape may comprise, at least in sections or regions, a curved or straight contour, in particular a tulip-shaped contour.
  • a distance between a fold on an end face of the jacket of the laundry drum and the drum housing is more than 8 mm, in particular more than 10 mm.
  • edges in the area of the water inlet opening are rounded, in particular rounded in the shape of a nozzle.
  • FIG. 1 shows components of a washer-dryer with air-condensation cooling, which is in the state after a wash and before a drying cycle.
  • the washer-dryer has a drum housing 1 (outer drum, tub), in which a laundry drum 2 (inner drum) for receiving laundry 3 is rotatably mounted.
  • a fresh water supply line 4 which opens into a dispenser 5
  • water is supplied with or without detergent additive to the drum housing 1 and forms there a free fleet 6.
  • the auficarmbare a heater 7 free fleet 6 can by means of a drain pump 8 through a drain channel 9 to the outside be drained.
  • a substantially self-contained process air duct 10 for the process air is connected to the tub 1.
  • the upper part 11 of the process air duct 10 is connected to the pressure side of a process air blower 12 and opens at its other end in the drum housing 1 above the filling opening (not shown here) of the laundry drum 2.
  • the lower part 13 of the process air duct 10 is to the suction side of the process air blower 12 connected and opens into an air outlet opening or water inlet opening 14 (relative to the drum housing 1) in a lower portion of the drum housing 1.
  • this water inlet opening 14 is still above the level that is ever reached by the fleet 6 during washing or rinsing.
  • a heating device not shown here, is typically also arranged for heating the process air.
  • the process air is blown by means of the blower 12 through the heater, heated there and then mixed in the laundry drum 2 with the wet laundry 3. There, the heat energy is used to evaporate the water in the laundry 3.
  • the thus loaded with steam process air is then cooled in a condenser 15 and passed back to the fan 12.
  • the condensation device 15 designed as a heat exchanger, which essentially has a cooler 16, is mounted in a lower part 13 of the process air channel 10.
  • the cooler 16 is cooled here by fresh air, which is sucked from the environment of the washer dryer by a cooling air blower 17 and fed to the cooler 16 via the cooling air inflow channel 18.
  • the cooling air is conducted via a cooling air outflow channel 19 to an exhaust air outlet 20.
  • the downpipe 21 is designed here as part of the process air duct 10. During drying, therefore, a mass transport of water results from the laundry 3 located in the drum 2 to the outside. This reduces the weight of the laundry 3 and thus also the force on the vibrating system.
  • the water inlet opening 14 is at the same time air outlet for the process air from the drum housing 1 and condensate or cooling water inlet into the drum 1 from the above arranged condensation device 15, arises at this opening 14 space reasons an air-water countercurrent with strong turbulence. For the best possible washing effect with low water consumption, the distances between the washing drum 2 and drum housing 1 are minimized. In a following laundry drying However, by water vortex of the condensate water to be dried laundry 3 and the inner drum 2 can be moistened again unintentionally. An unwanted humidification by condensate water deteriorates the consumption values of the drying process.
  • FIG. 2 shows a side view of a section of a washer-dryer 22, in which now the water inlet opening 14 is arranged in a rear wall 23 of the drum housing 1;
  • FIG. 3 Since the laundry drum 2 is not closed on the back, but to achieve a good flow characteristics of the process air drum openings 24 in the rear wall 25 of the laundry drum 2 are present, condensate can through the drum openings 24 in the Wash drum 2 penetrate. This can be done by direct spraying of condensate water in the drum openings 24, but above all by an accumulation of sprayed condensate in an inadvertently serving as a collecting groove fold 26 at the front bottom of the shell 27 of the laundry drum 2.
  • the therein Water entrained can run down on the rear wall 25 of the laundry drum 2 and thus pass through the drum openings 24 in the laundry drum 2.
  • Particularly critical is the distance d between the fold 26 and the drum housing 1, which is less than 8 mm so far.
  • the rear wall 23 of the drum housing 1 a recess 28 which extends from the water inlet opening 14, starting in the direction of the edge of the back or a jacket 29 of the drum housing 1, via a the jacket of the laundry drum 2 opposite radial position P out to the jacket 29 of the drum housing 1.
  • the contour of the previously used drum housing 1 and the process air duct 10 are shown in dashed lines.
  • the horizontal distance d between the fold 26 and the drum housing 1 is thereby increased to more 10 mm.
  • the recess 28 has in particular a side view ( FIG. 2 ) starting from the drum opening 14 funnel-shaped downwardly tapering shape, wherein the recess 28 has a continuously tapering in cross-section shown in the form shown.
  • the recess 28 also has a front view ( FIG. 3 ) to the edge or jacket 29 of tapered, tulip-shaped form. This shape is curved at two terminal sections and straight between them. In this case, the return is executed with respect to a radial direction shown here Strichat radial direction.
  • edges or transitions in the water outlet area are flow-optimized, for. B. rounded Tüllenförmig.
  • FIG. 4 shows a washer-dryer 30 in the region of the water inlet opening 14, which is now just above the fold 26.
  • the recess 28 is formed to a height just below the fold 26, but not quite up to the jacket 29th
  • the present invention is not limited to the embodiment shown.
  • a cooler / condenser with water cooling can be used instead of the air cooling shown.
  • other forms of return are possible, for. B. funnel-shaped with straight outer contour or straight down, and the recess may be attached to a wall other than the rear wall. Also, the return can be made shorter.
  • the recess need not extend radially from the water inlet opening to the outside, but for example also angled to a radial direction. Also, the return can, for example, additionally extend backward.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The spinner-washer (22) has a washer drum (2) pivoted in a drum housing (1) and has a water inlet (14) for entering cold water or condensed water. The water inlet is placed in a wall (23) of the drum housing. The wall has a retrace (28) which extends from the water inlet coming perpendicular to the wall and outwards from the drum housing.

Description

Die Erfindung betrifft einen Waschtrockner mit einer drehbar in einem Trommelgehäuse gelagerten Wäschetrommel und einer in einer Wand des Trommelgehäuses eingebrachten Wassereintrittsöffnung zum Eintritt von Kühl- und / oder Kondensatwasser in das Trommelgehäuse.The invention relates to a washer-dryer with a laundry drum rotatably mounted in a drum housing and a water inlet opening provided in a wall of the drum housing for the entry of cooling and / or condensate water into the drum housing.

Waschtrockner des Standes der Technik zeigen die Dokumente WO 2006/029953 WO 2007/138019 A1 sowie EP 0 636 732 B1 , DE 44 27 361 A1 und DE 195 22 307 C2 . In den drei letztgenannten Dokumenten ist in erster Linie jeweils ein Waschtrockner beschrieben, der zum Trocknen feuchter Wäsche mittels eines zirkulierenden Prozessluftstroms einen wassergekühlten Kondensator aufweist.Prior art washer-dryers show the documents WO 2006/029953 WO 2007/138019 A1 such as EP 0 636 732 B1 . DE 44 27 361 A1 and DE 195 22 307 C2 , The three last-mentioned documents primarily each describe a washer-dryer which has a water-cooled condenser for drying wet laundry by means of a circulating process air stream.

Unter einem Waschtrockner wird demgemäß ein Hausgerät verstanden, welches Wäsche sowohl waschen als auch trocknen kann und mit entsprechenden Einrichtungen ausgestattet ist. Wie eine übliche Waschmaschine weist ein Waschtrockner ein Trommelgehäuse nebst darin drehbarer Trommel zum Aufnehmen der Wäsche auf, dazu Einrichtungen zum Zu- und Abführen von Wasser und Wäschebehandlungsmittel etc. Zusätzlich ist in dem Waschtrockner ein Prozessluftkreislauf gebildet durch Gebläse, Heizkanal, Trommel mit Wäschebeladung und Kondensator, um die gewaschene Wäsche durch einen in dem Prozessluftkreislauf geführten Prozessluftstrom zu trocknen. Der Kondensator kann wasser- oder luftgekühlt sein. Der Lufteintritt in die Trommel befindet sich in der Regel im Türbereich über dem Schauglas, und der Luftaustritt aus der Trommel befindet sich an einer Wand, insbesondere am Trommelmantel oder in der Trommelrückwand. Die Luftaustrittsöffnung ist gleichzeitig Kondensat- und / oder Kühlwassereintrittsöffnung in die Trommel. Aus dem Trommelgehäuse wird während eines Trocknungsvorgangs periodisch Wasser abgepumpt. Bauraumbedingt entsteht in dieser Luftaustrittsöffnung ein Luft-Wasser-Gegenstrom mit starken Verwirbelungen.Under a washer dryer is thus understood a household appliance, which can both wash and dry laundry and is equipped with appropriate facilities. Like a conventional washing machine, a washer-dryer has a drum housing together with a rotatable drum for receiving the laundry, facilities for supplying and discharging water and laundry treatment means, etc. In addition, a process air circuit is formed in the washer-dryer by a fan, heating channel, drum with laundry load and condenser to dry the washed laundry by a process air flow in the process air circuit. The condenser can be water or air cooled. The air inlet into the drum is usually in the door area above the sight glass, and the air outlet from the drum is located on a wall, in particular on the drum shell or in the drum rear wall. The air outlet opening is at the same time condensate and / or cooling water inlet opening in the drum. From the drum housing periodically water is pumped out during a drying process. Because of the construction space, an air-water countercurrent with strong turbulences is created in this air outlet opening.

Für eine bestmögliche Waschwirkung mit geringem Wasserverbrauch sind die Abstände zwischen der Wäschetrommel und dem Trommelgehäuse auch in einem Waschtrockner minimiert; in einer folgenden Wäschetrocknung können jedoch durch Wasserwirbel des Kondensatwassers im Bereich der Luftaustrittsöffnung die Trommel und die darin befindliche, zu trocknende Wäsche wieder ungewollt befeuchtet werden. Solches ungewollte Befeuchten verschlechtert die Verbrauchswerte des Trocknungsprozesses, da das dabei verteilte Wasser zum erneuten Abführen durch den Prozessluftstrom insbesondere wieder verdampft werden muss. In einer Anordnung, bei der sich der der Luftaustritt am Trommelmantel befindet, kann durch eine gleichförmige Vergrößerung der Austrittsöffnung die Wirbelbildung verringert werden.For the best possible washing effect with low water consumption, the distances between the laundry drum and the drum housing are minimized even in a washer-dryer; However, in a subsequent drying of the laundry, the drum and the laundry to be dried therein can be moistened unintentionally by water swirls of the condensate water in the area of the air outlet opening. Such undesired moistening worsens the consumption values of the drying process, since the distributed water for re-discharging through the process air flow in particular again must be evaporated. In an arrangement in which the air outlet is located on the drum shell, the vortex formation can be reduced by a uniform enlargement of the outlet opening.

Es ist die Aufgabe der folgenden Erfindung, in einer Grundkonstruktion eines Waschtrockners, bei dem sich die Wassereintrittsöffnung an der Rückseite der Trommel befindet, die Benetzung von Innentrommel und Wäsche mit Kondensat- und / oder Kühlwasser zu verringern oder sogar zu verhindern.It is the object of the following invention, in a basic construction of a washer dryer in which the water inlet opening is located at the rear of the drum to reduce or even prevent the wetting of the inner drum and laundry with condensate and / or cooling water.

Diese Aufgabe wird mittels eines Waschtrockners nach dem unabhängigen Patentanspruch gelöst. Bevorzugte Ausführungsformen sind insbesondere den abhängigen Patentansprüchen entnehmbar.This object is achieved by means of a washer-dryer according to the independent claim. Preferred embodiments are in particular the dependent claims.

Der Waschtrockner ist mit einer drehbar in einem Trommelgehäuse (Außentrommel, Laugenbehälter) gelagerten Wäschetrommel (Innentrommel) und einer in einer Wand des Trommelgehäuses eingebrachten Wassereintrittsöffnung zum Eintritt von Kühlwasser und/oder Kondensatwasser versehen; dabei weist die Wand einen Rücksprung auf, der sich von der Wassereintrittsöffnung ausgehend etwa senkrecht zu der Wand und auswärts von dem Trommelgehäuse erstreckt.The washer-dryer is provided with a laundry drum (inner drum) mounted rotatably in a drum housing (outer drum, tub) and a water inlet opening provided in a wall of the drum housing for entry of cooling water and / or condensate water; In this case, the wall has a recess which extends from the water inlet opening approximately perpendicular to the wall and outwardly of the drum housing.

Erfindungsgemäß dringt Wasser aus der Wassereintrittsöffnung nicht auf geradem Wege in das Trommelgehäuse ein, sondern es muss zunächst den Rücksprung durchfließen. Dadurch wird das Ausbilden von Tropfen und Spritzern im Bereich der Innentrommel und der dort eventuell vorhandenen Wäsche im Trommelgehäuse vermieden.According to the invention does not penetrate water from the water inlet opening in a straight path in the drum housing, but it must first flow through the return. As a result, the formation of drops and splashes in the area of the inner drum and any laundry there in the drum housing is avoided.

Die Wand mit dem Rücksprung ist dabei vorzugsweise eine Rückwand, und der Rücksprung erstreckt sich in Richtung eines Mantels des Trommelgehäuses.The wall with the recess is preferably a rear wall, and the recess extends in the direction of a jacket of the drum housing.

Es ist durchaus denkbar und kann je nach Gestaltung des Trommelgehäuses und der daran angeschlossenen weiteren Komponenten des Waschtrockners auch vorteilhaft sein, die Wassereintrittsöffnung mit dem Rücksprung an einer anderen Wand des Trommelgehäuses, insbesondere an seinem Mantel, vorzusehen.It is quite conceivable and may also be advantageous, depending on the design of the drum housing and the other components of the washer dryer connected thereto, to provide the water inlet opening with the recess on another wall of the drum housing, in particular on its jacket.

Ist die Wassereintrittsöffnung an der Rückwand des Trommelgehäuses vorgesehen, so weist die Rückwand vorzugsweise einen Rücksprung auf, der sich von der Wassereintrittsöffnung ausgehend in Richtung des Mantels des Trommelgehäuses bzw. in Richtung des Randes der Rückwand erstreckt.If the water inlet opening is provided on the rear wall of the drum housing, the rear wall preferably has a recess which extends from the water inlet opening in the direction of the jacket of the drum housing or in the direction of the edge of the rear wall.

Der Rücksprung kann gegebenenfalls auch als eine Erweiterung der Wassereintrittsöffnung in Richtung des Mantels der Rückwand angesehen werden. Ein Waschtrockner mit einem dergestalt abstandsoptimierten Luftaustrittsbereich in der Trommelrückwand verringert die erneute Befeuchtung des zu trocknenden Wäschepostens durch verwirbeltes Wasser und ist somit insbesondere verbessert hinsichtlich des .Aufwandes an Energie und Zeit für den Trocknungsprozess.If appropriate, the recess can also be regarded as an extension of the water inlet opening in the direction of the jacket of the rear wall. A washer-dryer with a distance-optimized air outlet region in the drum rear wall reduces the rewetting of the laundry item to be dried by swirling water and is thus improved in terms of the expenditure on energy and time for the drying process.

Vorzugsweise entspricht die Wassereintrittsöffnung in das Trommelgehäuse gleichzeitig der Luftaustrittsöffnung in einen Prozessluftkanal. Alternativ können aber auch Wassereintrittsöffnung und Luftaustrittsöffnung ganz oder teilweise voneinander getrennt sein.Preferably, the water inlet opening in the drum housing simultaneously corresponds to the air outlet opening in a process air duct. Alternatively, however, the water inlet opening and the air outlet opening can be completely or partially separated from one another.

Vorzugsweise erstreckt sich die Rückwand entlang einer Radialenrichtung nach Außen, beispielsweise entlang einer gedachten Linie, die in etwa durch die Mitte der Rückwand und die Mitte der Lufteinlassöffnung läuft. Vorzugsweise ist der Rücksprung spiegelsymmetrisch bezüglich dieser Linie bzw. Richtung ausgestaltet.Preferably, the rear wall extends outward along a radial direction, for example, along an imaginary line that passes approximately through the center of the rear wall and the center of the air inlet opening. Preferably, the return is designed mirror-symmetrically with respect to this line or direction.

Es wird zur verringerten Füllung einer Falzung an einem Stirnboden des Mantels der Wäschetrommel bevorzugt, wenn sich der Rücksprung mindestens bis zu einer radialen Position erstreckt, die einem Mantel der Wäschetrommel gegenüberliegt, insbesondere, falls sich der Rücksprung weiter bis zu einem Mantel des Trommelgehäuses erstreckt.It is preferred for the reduced filling of a fold on a front bottom of the drum of the laundry drum when the recess extends at least to a radial position which is opposite a jacket of the laundry drum, in particular, if the recess further extends to a shell of the drum housing.

Vorzugsweise weist der Rücksprung zumindest teilweise eine sich von der Wassereintrittsöffnung ausgehende verjüngende (trichterförmige) Form auf, insbesondere eine sich über den Großteil der Länge oder die gesamte Länge des Rücksprungs erstreckende Trichterform. Dabei verringern sich die Breite oder die Querschnittsfläche des Trichters.Preferably, the recess at least partially has a tapered (funnel-shaped) shape starting from the water inlet opening, in particular a funnel shape extending over the majority of the length or the entire length of the recess. This will reduce the width or cross-sectional area of the funnel.

Vorzugsweise weist der Rücksprung eine sich in Aufsicht von vorne zumindest abschnittsweise verjüngende Form auf. Diese Form kann zumindest abschnittsweise oder bereichsweise eine gekrümmte oder gerade Kontur umfassen, insbesondere eine tulpenförmige Kontur.Preferably, the recess has a tapering in plan view from the front at least in sections form. This shape may comprise, at least in sections or regions, a curved or straight contour, in particular a tulip-shaped contour.

Vorzugsweise weist der Rücksprung eine sich im Querschnitt zumindest abschnittsweise verjüngende Form auf. Diese Form kann zumindest abschnittsweise oder bereichsweise eine gekrümmte oder gerade Kontur umfassen, insbesondere eine tulpenförmige Kontur. Vorzugsweise beträgt ein Abstand zwischen einer Falzung an einem Stirnboden des Mantels der Wäschetrommel und dem Trommelgehäuse mehr als 8 mm, insbesondere mehr als 10 mm.Preferably, the recess has a cross-sectionally at least partially tapered shape. This shape may comprise, at least in sections or regions, a curved or straight contour, in particular a tulip-shaped contour. Preferably, a distance between a fold on an end face of the jacket of the laundry drum and the drum housing is more than 8 mm, in particular more than 10 mm.

Zur Vermeidung von Wasserwirbeln sind Kanten im Bereich der Wassereintrittsöffnung verrundet, insbesondere tüllenförmig verrundet.In order to avoid swirling of water, edges in the area of the water inlet opening are rounded, in particular rounded in the shape of a nozzle.

In den folgenden Figuren wird die Erfindung anhand eines Ausführungsbeispiels schematisch genauer beschrieben. Dabei können zur besseren Übersichtlichkeit gleiche oder gleichwirkende Elemente über verschiedene Figuren hinweg mit gleichen Bezugszeichen versehen sein.

FIG 1
zeigt als Schnittdarstellung in Vorderansicht Komponenten eines bekann- ten Waschtrockners mit einer Luftaustrittsöffnung bzw. Wassereintrittsöff- nung am Trommelmantel;
FIG 2
zeigt als Schnittdarstellung in Querschnittsansicht einen Ausschnitt eines Waschtrockners gemäß besagtem Ausführungsbeispiel mit einer Wasser- eintrittsöffnung an einer Rückwand des Trommelgehäuses;
FIG 3
zeigt eine Aufsicht von vorne auf die Wassereintrittsöffnung des Waschtrockners aus FIG 2;
FIG 4
zeigt als Schnittdarstellung in Querschnittsansicht eine weitere aus- schnittsweise Ansicht eines Waschtrockners gemäß besagtem Ausfüh- rungsbeispiel mit einer Wassereintrittsöffnung an einer Rückwand des Trommelgehäuses.
In the following figures, the invention will be described schematically with reference to an embodiment schematically. For the sake of clarity, the same or equivalent elements can be provided with the same reference characters across different figures.
FIG. 1
shows a sectional front view of components of a known washer-dryer with an air outlet opening or water inlet opening on the drum shell;
FIG. 2
shows a sectional view in cross-sectional view of a section of a washer dryer according to said embodiment with a water inlet opening on a rear wall of the drum housing;
FIG. 3
shows a view from the front of the water inlet opening of the washer dryer FIG. 2 ;
FIG. 4
shows a sectional view in cross-sectional view of another cut-away view of a washer-dryer according to said exemplary embodiment with a water inlet opening on a rear wall of the drum housing.

FIG 1 zeigt Komponenten eines Waschtrockners mit Luftkondensationskühlung, welcher sich im Zustand nach einem Waschgang und vor einem Trocknungsgang befindet. Der Waschtrockner weist ein Trommelgehäuse 1 (Außentrommel, Laugenbehälter) auf, in welchem eine Wäschetrommel 2 (Innentrommel) zur Aufnahme von Wäsche 3 drehbar gelagert ist. Mittels einer Frischwasserzuleitung 4, die in eine Einspülschale 5 mündet, wird Wasser mit oder ohne Waschmittelzusatz dem Trommelgehäuse 1 zugeführt und bildet dort eine freie Flotte 6. Die über eine Heizung 7 aufwärmbare freie Flotte 6 kann mittels einer Laugenpumpe 8 durch einen Ablaufkanal 9 nach Außen abgelassen werden. Zusätzlich ist am Laugenbehälter 1 ein im Wesentlichen in sich geschlossener Prozessluftkanal 10 für die Prozessluft angeschlossen. Der obere Teil 11 des Prozessluftkanals 10 ist mit der Druckseite eines Prozessluftgebläses 12 verbunden und mündet mit seinem anderen Ende in dem Trommelgehäuse 1 oberhalb der Einfüllöffnung (hier nicht dargestellt) der Wäschetrommel 2. Der untere Teil 13 des Prozessluftkanals 10 ist an die Saugseite des Prozessluftgebläses 12 angeschlossen und mündet in einer Luftaustrittsöffnung bzw. Wassereintrittsöffnung 14 (bezüglich des Trommelgehäuses 1) in einen unteren Bereich des Trommelgehäuses 1. Diese Wassereintrittsöffnung 14 liegt aber immer noch oberhalb desjenigen Niveaus, das von der Flotte 6 beim Waschen oder Spülen jemals erreicht wird. Im oberen Kanalteil 11 ist typischerweise noch eine hier nicht dargestellte Heizvorrichtung zum Erhitzen der Prozessluft angeordnet. Im Trocknungsbetrieb wird die Prozessluft mittels des Gebläses 12 durch die Heizvorrichtung geblasen, dort erwärmt und anschließend in der Wäschetrommel 2 mit der feuchten Wäsche 3 durchmischt. Dort wird die Wärmeenergie dazu verwendet, das in der Wäsche 3 befindliche Wasser zu verdampfen. Die solcherart mit Dampf beladene Prozessluft wird anschließend in einer Kondensationsvorrichtung 15 abgekühlt und wieder zum Gebläse 12 geleitet. FIG. 1 shows components of a washer-dryer with air-condensation cooling, which is in the state after a wash and before a drying cycle. The washer-dryer has a drum housing 1 (outer drum, tub), in which a laundry drum 2 (inner drum) for receiving laundry 3 is rotatably mounted. By means of a fresh water supply line 4, which opens into a dispenser 5, water is supplied with or without detergent additive to the drum housing 1 and forms there a free fleet 6. The aufwärmbare a heater 7 free fleet 6 can by means of a drain pump 8 through a drain channel 9 to the outside be drained. In addition, a substantially self-contained process air duct 10 for the process air is connected to the tub 1. The upper part 11 of the process air duct 10 is connected to the pressure side of a process air blower 12 and opens at its other end in the drum housing 1 above the filling opening (not shown here) of the laundry drum 2. The lower part 13 of the process air duct 10 is to the suction side of the process air blower 12 connected and opens into an air outlet opening or water inlet opening 14 (relative to the drum housing 1) in a lower portion of the drum housing 1. However, this water inlet opening 14 is still above the level that is ever reached by the fleet 6 during washing or rinsing. In the upper channel part 11, a heating device, not shown here, is typically also arranged for heating the process air. In the drying operation, the process air is blown by means of the blower 12 through the heater, heated there and then mixed in the laundry drum 2 with the wet laundry 3. There, the heat energy is used to evaporate the water in the laundry 3. The thus loaded with steam process air is then cooled in a condenser 15 and passed back to the fan 12.

Dazu ist die als Wärmetauscher ausgeführte Kondensationseinrichtung 15, die im Wesentlichen einen Kühler 16 aufweist, in einem unteren Teil 13 des Prozessluftkanals 10 angebracht. Der Kühler 16 wird hier durch Frischluft gekühlt, die aus der Umgebung des Waschtrockners von einem Kühlluftgebläse 17 angesaugt und über den Kühlluftzuflusskanal 18 dem Kühler 16 zugeführt wird. Nach Durchströmen des Kühlers 16 und Aufnahme von Wärmeenergie aus der Prozessluft wird die Kühlluft über einen Kühlluftabflusskanal 19 zu einem Abluftausgang 20 geführt. Beim Kühlen der Prozessluft im Kühler 16 anfallendes Kondensat wird über eine Fallleitung 21 durch die Wassereintrittsöffnung 14 zum Trommelgehäuse 1 abgeleitet und von dort mittels der Laugenpumpe 8 von Zeit zu Zeit in das Abwassersystem abgepumpt. Die Fallleitung 21 ist hier als Teil des Prozessluftkanals 10 ausgeführt. Während der Trocknung ergibt sich also ein Massentransport von Wasser aus der in der Trommel 2 befindlichen Wäsche 3 nach außen. Dadurch verringern sich das Gewicht der Wäsche 3 und damit auch die Kraft auf das Schwingsystem.For this purpose, the condensation device 15 designed as a heat exchanger, which essentially has a cooler 16, is mounted in a lower part 13 of the process air channel 10. The cooler 16 is cooled here by fresh air, which is sucked from the environment of the washer dryer by a cooling air blower 17 and fed to the cooler 16 via the cooling air inflow channel 18. After flowing through the radiator 16 and receiving heat energy from the process air, the cooling air is conducted via a cooling air outflow channel 19 to an exhaust air outlet 20. When condensing the process air in the cooler 16 resulting condensate is discharged via a downpipe 21 through the water inlet opening 14 to the drum housing 1 and pumped from there by means of the drain pump 8 from time to time in the sewage system. The downpipe 21 is designed here as part of the process air duct 10. During drying, therefore, a mass transport of water results from the laundry 3 located in the drum 2 to the outside. This reduces the weight of the laundry 3 and thus also the force on the vibrating system.

Da die Wassereintrittsöffnung 14 gleichzeitig Luftaustritt für die Prozessluft aus dem Trommelgehäuse 1 und Kondensat- bzw. Kühlwassereintritt in die Trommel 1 aus der oberhalb angeordneten Kondensationseinrichtung 15 ist, entsteht an dieser Öffnung 14 bauraumbedingt ein Luft-Wasser-Gegenstrom mit starken Verwirbelungen. Für eine bestmögliche Waschwirkung mit geringem Wasserverbrauch sind die Abstände zwischen Wäcrhetrommel 2 und Trommelgeäuse 1 minimiert In einer folgenden Wäschetroknung können jedoch durch Wasserwirbel des Kondensatwassers die zu trocknende Wäsche 3 und die Innentrommel 2 wieder ungewollt befeuchtet werden. Eine ungewollte Befeuchtung durch Kondensatwasser verschlechtert die Verbrauchswerte des Trocknungsprozesses.Since the water inlet opening 14 is at the same time air outlet for the process air from the drum housing 1 and condensate or cooling water inlet into the drum 1 from the above arranged condensation device 15, arises at this opening 14 space reasons an air-water countercurrent with strong turbulence. For the best possible washing effect with low water consumption, the distances between the washing drum 2 and drum housing 1 are minimized. In a following laundry drying However, by water vortex of the condensate water to be dried laundry 3 and the inner drum 2 can be moistened again unintentionally. An unwanted humidification by condensate water deteriorates the consumption values of the drying process.

In dieser Figur ist lediglich zur übersichtlicheren Darstellung der einzelnen Komponenten die Variante des Waschtrockners mit der Wassereintrittsöffnung 14 am Mantel des Trommelgehäuses 1 gezeigt. Diese Elemente sind grundsätzlich auch bei Anordnung der Wassereintrittsöffnung 14 an der Rückwand des Trommelgehäuses 1 vorhanden.In this figure, only for a clearer view of the individual components, the variant of the washer-dryer with the water inlet opening 14 on the jacket of the drum housing 1 is shown. In principle, these elements are also present when the water inlet opening 14 is arranged on the rear wall of the drum housing 1.

FIG 2 zeigt in Seitenansicht einen Ausschnitt aus einem Waschtrockner 22, bei dem nun die Wassereintrittsöffnung 14 in einer Rückwand 23 des Trommelgehäuses 1 angeordnet ist; FIG 3 zeigt diesen Waschtrockner 22 von vorne mit Blick auf die Wassereintrittsöffnung 14. Da die Wäschetrommel 2 rückseitig nicht geschlossen ist, sondern zur Erreichung einer guten Strömungscharakteristik der Prozessluft Trommelöffnungen 24 in der Rückwand 25 der Wäschetrommel 2 vorhanden sind, kann Kondensatwasser durch die Trommelöffnungen 24 in die Wäschetrommel 2 eindringen. Dies kann durch direktes Spritzen von Kondensatwasser in die Trommelöffnungen 24 geschehen, aber vor allem auch durch ein Ansammeln von ausgespritztem Kondensatwasser in einer unbeabsichtigt als Sammelrinne dienenden Falzung 26 am Stirnboden des Mantels 27 der Wäschetrommel 2. Bei einer Drehung der Wäschetrommel 2 wird das darin befindliche Wasser mitgezogen, kann an der Rückwand 25 der Wäschetrommel 2 herablaufen und so durch die Trommelöffnungen 24 in die Wäschetrommel 2 gelangen. Besonders kritisch ist dabei der Abstand d zwischen der Falzung 26 und dem Trommelgehäuse 1, der bisher weniger als 8 mm beträgt. FIG. 2 shows a side view of a section of a washer-dryer 22, in which now the water inlet opening 14 is arranged in a rear wall 23 of the drum housing 1; FIG. 3 Since the laundry drum 2 is not closed on the back, but to achieve a good flow characteristics of the process air drum openings 24 in the rear wall 25 of the laundry drum 2 are present, condensate can through the drum openings 24 in the Wash drum 2 penetrate. This can be done by direct spraying of condensate water in the drum openings 24, but above all by an accumulation of sprayed condensate in an inadvertently serving as a collecting groove fold 26 at the front bottom of the shell 27 of the laundry drum 2. Upon rotation of the laundry drum 2, the therein Water entrained, can run down on the rear wall 25 of the laundry drum 2 and thus pass through the drum openings 24 in the laundry drum 2. Particularly critical is the distance d between the fold 26 and the drum housing 1, which is less than 8 mm so far.

Um das erneute Befeuchten der Wäsche 3 zu vermeiden, weist die Rückwand 23 des Trommelgehäuses 1, einen Rücksprung 28 auf, der sich von der Wassereintrittsöffnung 14 ausgehend in Richtung des Randes der Rückseite bzw. eines Mantels 29 des Trommelgehäuses 1 erstreckt, und zwar über eine dem Mantel der Wäschetrommel 2 gegenüberliegenden radialen Position P hinaus bis zum Mantel 29 des Trommelgehäuses 1. Die Kontur des bisher verwendeten Trommelgehäuses 1 und des Prozessluftkanals 10 sind gestrichelt dargestellt. Der horizontale Abstand d zwischen der Falzung 26 und dem Trommelgehäuse 1 wird dadurch auf mehr 10 mm vergrößert. Durch diesen Rücksprung 28 wird es Spritzwasser erschwert, in die Trommelöffnungen 24 zu gelangen, als auch, sich in der Falzung 26 zu sammeln.In order to avoid rewetting the laundry 3, the rear wall 23 of the drum housing 1, a recess 28 which extends from the water inlet opening 14, starting in the direction of the edge of the back or a jacket 29 of the drum housing 1, via a the jacket of the laundry drum 2 opposite radial position P out to the jacket 29 of the drum housing 1. The contour of the previously used drum housing 1 and the process air duct 10 are shown in dashed lines. The horizontal distance d between the fold 26 and the drum housing 1 is thereby increased to more 10 mm. By this recess 28, it is difficult splash water to get into the drum openings 24, as well as to collect in the fold 26.

Der Rücksprung 28 weist im speziellen eine seitlich betrachtet (FIG 2) sich von der Trommelöffnung 14 ausgehend trichterförmig nach unten verjüngende Form auf, bei der der Rücksprung 28 eine sich im gezeigten Querschnitt kontinuierlich verjüngende Form aufweist. Der Rücksprung 28 weist auch in Aufsicht von vorne (FIG 3) eine sich zum Rand bzw. Mantel 29 aus verjüngende, tulpenförmige Form auf. Diese Form ist an zwei endständigen Abschnitten gekrümmt und dazwischen geradlinig. Dabei ist der Rücksprung bezüglich einer hier gestrichpunktet eingezeichneten Radialenrichtung spiegelsymmetrisch ausgeführt.The recess 28 has in particular a side view ( FIG. 2 ) starting from the drum opening 14 funnel-shaped downwardly tapering shape, wherein the recess 28 has a continuously tapering in cross-section shown in the form shown. The recess 28 also has a front view ( FIG. 3 ) to the edge or jacket 29 of tapered, tulip-shaped form. This shape is curved at two terminal sections and straight between them. In this case, the return is executed with respect to a radial direction shown here Strichpunktet radial direction.

Zur Verringerung der Wirbelbildung an der Wassereintrittsöffnung 14 bzw. im Wasseraustrittsbereich sind der Rücksprung 28 und der Übergangsbereich B zwischen Rücksprung 28 und übriger Rückwand 23 ohne Kanten ausgebildet. Allgemein sind Kanten bzw. Übergänge im Wasseraustrittsbereich strömungsoptimiert, z. B. tüllenförmig verrundet.To reduce the vortex formation at the water inlet opening 14 or in the water outlet region of the recess 28 and the transition region B between the recess 28 and the remaining rear wall 23 are formed without edges. In general, edges or transitions in the water outlet area are flow-optimized, for. B. rounded Tüllenförmig.

FIG 4 zeigt einen Waschtrockner 30 im Bereich der Wassereintrittsöffnung 14, die sich nun knapp oberhalb der Falzung 26 befindet. Der Rücksprung 28 ist bis auf eine Höhe knapp unter der Falzung 26 ausgebildet, aber nicht ganz bis zum Mantel 29. FIG. 4 shows a washer-dryer 30 in the region of the water inlet opening 14, which is now just above the fold 26. The recess 28 is formed to a height just below the fold 26, but not quite up to the jacket 29th

Selbstverständlich ist die vorliegende Erfindung nicht auf das gezeigte Ausführungsbeispiel beschränkt. So kann statt der gezeigten Luftkühlung auch ein Kühler / Kondensator mit Wasserkühlung verwendet werden. Auch sind andere Formen des Rücksprungs möglich, z. B. trichterförmig mit gerader Außenkontur oder gerade heruntergezogen, und der Rücksprung kann an einer anderen Wand als der Rückwand angebracht sein. Auch kann der Rücksprung kürzer ausgeführt sein. Ferner braucht sich der Rücksprung nicht radial von der Wassereintrittsöffnung nach Außen zu erstrecken, sondern beispielsweise auch angewinkelt zu einer Radialenrichtung. Auch kann der Rücksprung sich beispielsweise zusätzlich rückwärtig ausweiten.Of course, the present invention is not limited to the embodiment shown. Thus, instead of the air cooling shown, a cooler / condenser with water cooling can be used. Also, other forms of return are possible, for. B. funnel-shaped with straight outer contour or straight down, and the recess may be attached to a wall other than the rear wall. Also, the return can be made shorter. Furthermore, the recess need not extend radially from the water inlet opening to the outside, but for example also angled to a radial direction. Also, the return can, for example, additionally extend backward.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Trommelgehäusedrum housing
22
Wäschetrommelwashing drum
33
WäscheLaundry
44
FrischwasserzuleitungFresh water supply
55
Einspülschale 6 freie FlotteEinspülschale 6 free fleet
77
Heizungheater
88th
LaugenpumpeDrain pump
99
Ablaufkanaldrain channel
1010
ProzessluftkanalProcess air duct
1111
oberer Teil des Prozessluftkanalsupper part of the process air duct
1212
ProzessluftgebläsesProcess air fan
1313
unterer Teil des Prozessluftkanalslower part of the process air duct
1414
Luftaustrittsöffnung / WassereintrittsöffnungAir outlet opening / water inlet opening
1515
Kondensationsvorrichtungcondensation device
1616
Kühlercooler
1717
KühlluftgebläseCooling fan
1818
KühlluftzuflusskanalCooling air inlet channel
1919
KühlluftabflusskanalCooling air outlet channel
2020
Abluftausgangexhaust air outlet
2121
Fallleitungpenstock
2222
Waschtrocknerwasher dryer
2323
Rückwand des TrommelgehäusesRear wall of the drum housing
2424
Trommelöffnungdrum opening
2525
Rückwand der WäschetrommelRear wall of the laundry drum
2626
Falzungfold
2727
Mantel der WäschetrommelCoat of laundry drum
2828
Rücksprungreturn
2929
Mantel des TrommelgehäusesSheath of the drum housing
3030
Waschtrocknerwasher dryer

Claims (9)

  1. Laundry drier (22; 30) with a laundry drum (2) rotatably mounted in a drum housing (1) and a water inlet opening (14), which is formed in a wall (23) of the drum housing (1), for the entry of cooling water and/or condensation water, characterised in that the wall (23) has a set-back portion (28) which starting from the water inlet opening (14) extends approximately perpendicularly to the wall (23) and outwardly from the drum housing (1).
  2. Laundry drier (22; 30) according to claim 1, characterised in that the wall (23) is a rear wall (23) and that the set-back portion (28) extends in the direction of a casing (29) of the drum housing (1).
  3. Laundry drier (22; 30) according to claim 2, characterised in that the rear wall (23) extends outwardly along a radial direction.
  4. Laundry drier (22; 30) according to one of claims 2 and 3, characterised in that the set-back portion (28) extends at least up to a position (P) opposite a casing (27) of the laundry drum (2).
  5. Laundry drier (22) according to claim 4, characterised in that the set-back portion (28) extends up to a casing (29) of the drum housing (1).
  6. Laundry drier (22; 30) according to any one of the preceding claims, characterised in that the set-back portion (28) has a form which in plan view tapers at least in a section from the front.
  7. Laundry drier (22; 30) according to any one of the preceding claims, characterised in that the set-back portion (28) has a form tapering at least in a section in cross-section.
  8. Laundry drier (22; 30) according to any one of the preceding claims, characterised in that a spacing (d) between a fold (26) at a base end of the casing (27) of the laundry drum (2) and the drum housing (1) is more than 8 millimetres, particularly more than 10 millimetres.
  9. Laundry drier (22; 30) according to any one of the preceding claims, characterised in that edges of the drum housing (1) are rounded in beak-shape at the water inlet opening (14).
EP09100229A 2008-04-24 2009-04-07 Washer-dryer with a drum housing with a water entry opening Active EP2112263B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008020571A DE102008020571A1 (en) 2008-04-24 2008-04-24 Washer dryer with a drum housing having a water inlet opening

Publications (2)

Publication Number Publication Date
EP2112263A1 EP2112263A1 (en) 2009-10-28
EP2112263B1 true EP2112263B1 (en) 2011-09-21

Family

ID=40847370

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09100229A Active EP2112263B1 (en) 2008-04-24 2009-04-07 Washer-dryer with a drum housing with a water entry opening

Country Status (4)

Country Link
EP (1) EP2112263B1 (en)
CN (1) CN101597854B (en)
AT (1) ATE525513T1 (en)
DE (1) DE102008020571A1 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES242354Y (en) * 1979-03-16 1979-11-16 DRYING DEVICE FOR CLOTHES WASHING MACHINES.
DE4325209A1 (en) 1993-07-27 1995-02-02 Bosch Siemens Hausgeraete Washing machine set up to dry
DE4427361A1 (en) 1994-08-02 1996-02-08 Bosch Siemens Hausgeraete Washing machine set up to dry
DE19522307C2 (en) 1995-06-20 2000-06-08 Bsh Bosch Siemens Hausgeraete Washing machine or dishwasher set up for drying
JP3517618B2 (en) * 1999-10-21 2004-04-12 株式会社東芝 Drum type washer / dryer
JP3600106B2 (en) * 2000-03-01 2004-12-08 株式会社日立製作所 Clothes dryer
DE102004044176A1 (en) * 2004-09-13 2006-03-30 BSH Bosch und Siemens Hausgeräte GmbH Drying process for a household appliance and household appliance for carrying out the drying process
CN101082161B (en) 2006-05-31 2013-10-09 博西华电器（江苏）有限公司 Barrel washing machine provided with drying procedure and control method thereof

Also Published As

Publication number Publication date
ATE525513T1 (en) 2011-10-15
EP2112263A1 (en) 2009-10-28
CN101597854A (en) 2009-12-09
DE102008020571A1 (en) 2009-10-29
CN101597854B (en) 2012-04-25

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