EP1204792B1 - Laundry treating machine - Google Patents

Laundry treating machine Download PDF

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Publication number
EP1204792B1
EP1204792B1 EP00956360A EP00956360A EP1204792B1 EP 1204792 B1 EP1204792 B1 EP 1204792B1 EP 00956360 A EP00956360 A EP 00956360A EP 00956360 A EP00956360 A EP 00956360A EP 1204792 B1 EP1204792 B1 EP 1204792B1
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EP
European Patent Office
Prior art keywords
heating chamber
laundry
pumping
solution container
laundry treatment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP00956360A
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German (de)
French (fr)
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EP1204792A1 (en
Inventor
Edwin Bolduan
Harald MOSCHÜTZ
Horst Wiemer
Karl Thier
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BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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Priority to SI200030703T priority Critical patent/SI1204792T1/en
Publication of EP1204792A1 publication Critical patent/EP1204792A1/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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/04—Heating arrangements
    • 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements

Definitions

  • the invention relates to a laundry treatment machine containing a tub, a laundry absorbing laundry drum rotatable in the tub is arranged, a pumping device with a pump for recirculation of Wash treatment liquid from the bottom of the tub back into the Laundry drum, at least one electric radiator in a heating chamber at the bottom Part of the tub, a provided in the heating chamber Umpump inlet opening the Umpumpvorraum and a device for pumping the no longer required lye.
  • a laundry treatment machine is in the context of the invention, in particular a Washing machine, but can also be a machine for rinsing and / or impregnation be of laundry. These other features can also be used in a washing machine be integrated.
  • a laundry treatment machine of the aforementioned type is known from DE 3401 899 A1 known. It shows a washing machine with a cylindrical tub and with a coaxially disposed therein, rotatable laundry drum.
  • the deepest part of the lye tank is in fluid communication with a water tank disposed below it, in which an electric heating element is arranged.
  • a Umpump inlet opening of a pumping device for the recirculation of liquor back into the tub in the upper area.
  • an exhaust pump inlet opening a pumping device for pumping lye at the end of a washing process. In both pumping devices is ever a pump.
  • the pumping device Since the pumping device opens at the bottom of the water tank, can during pumping the heating element are exposed. It is therefore not certain that the Lye level is always sufficient above the electric heating element to a dry operation to avoid the heating element.
  • the pump of the pumping device is likely from the water tank under the tub suck lye only if the Heating elements are electrically switched off. In the tub but should only possible a lot of water, as can be absorbed by the laundry in the drum. This would mean that the heating element can be switched on too rarely and the Heating process would therefore take an unreasonable time.
  • the Radiator To the formation of vapor bubbles over the radiator and overheating of the radiator As well as the surrounding components and the laundry must be prevented, the Radiator must be covered with water in all operating situations. This will Usually achieved in that before the start of the heating phase of the tub so is filled with water until it reaches a water level at which the radiator covered with water. The detection of this level can be done by at the lower part of the Lye tank or pump sump mounted pressure switch, by measuring the dynamic pressure on the pump pressure side of the pumping device or by a Paddle switch in the flow path of the circulating pump (DE 43 32 225 A1) done.
  • a disadvantage of the known arrangements is that due to the movement of the Tumble caused turbulence in the wash liquor a liquor level must be, which is clearly above the radiator. A reduction the free fleet during the heating phase is therefore limited by this level down.
  • the "free liquor” is the proportion of the wash liquor which does not wash is sucked up.
  • the heating chamber as a formed on the tub bottom integrally formed trough, the side walls of the Radiators are so close to each other that they are in the operation of the treatment liquid surrounding radiator not yet overheated, that the pumping inlet opening the Umpümpvortechnisch in the heating chamber above the at least one radiator is arranged and that between the heating chamber and the pumping device a Reflux is arranged, which a return flow from the pumping device in prevents the heating chamber.
  • the invention provides the advantage that the proportion of the free fleet essential is reduced and at the same time to always sufficient coverage of the radiator secured with liquid required minimum amount of water, compared to the measures but can still be reduced from the prior art.
  • the side walls extend from the Circumferential course of the wall of the tub in one piece down.
  • the trough is a heating chamber housing formed, which formed on the underside of the tub and with the lowest point of the tub through a through hole in flow communication is held, whose horizontal cross-section is substantially smaller than the horizontal Cross section of the heating chamber housing.
  • a pump down inlet opening of a pumping device is at a lowest point of the heating chamber a pump down inlet opening of a pumping device connected.
  • the non-return valve is preferably a check valve.
  • an electrical control device and a Fresh water supply device for the controlled supply of fresh water in the laundry drum provided depending on the liquid level in the heating chamber.
  • the electrical control device is preferably a part of existing in washing machines Control device which several optional washing programs and optionally includes further laundry treatment programs.
  • the laundry treating machine according to the invention is preferably a washing machine, However, it can also be another machine for rinsing or strengthening the laundry with tonic or otherwise treating the laundry with liquid.
  • a Washing machine can do all these laundry treatment functions in the form of different Programs include.
  • the laundry treating machine of Fig. 1 includes a machine housing 2 a non-rotating tub 4 and therein a laundry drum 6, which order a horizontal axis of rotation is rotatably mounted.
  • a laundry drum 6 In the laundry drum 6 are pieces of laundry 8 indicated, which by driver 10 on the inner circumference of the laundry drum 6 are raised when turning this laundry drum 6 and fall down again. As a result, a constant redeployment of the laundry items 8 takes place.
  • Fresh water is supplied from an open-close valve 14 from a fresh water line 12 a detergent container 16, which detergent, detergent, Wäschephasesch or may contain another laundry treatment agent introduced into the laundry drum 6.
  • a detergent container 16 which detergent, detergent, WäscheParker or may contain another laundry treatment agent introduced into the laundry drum 6.
  • the valve 14 is connected to an electronic control device 18 connected.
  • a Umpumpvorraum 20 For constant flooding of the laundry items 8 with the treatment liquid is a Umpumpvorplatz 20 with a pump 22, a suction line 24 on the suction side and a pressure line 26 on the pressure side of the pump 22 is provided.
  • the pressure line 26 the treatment liquid recirculates from the lower end of the laundry drum 6 or the Lye container 4 back into the laundry drum 6 on the laundry items.
  • the tub 4 is formed at its lower end (bottom) with a downwardly shaped Well 28 provided, which forms a heating chamber 30, in which at least one electrical heating element 32 is arranged, preferably a tubular heater.
  • a pumped inlet port 34 of the suction line 24 of the pumping device 20 is in a side wall 36 so far above the radiator 32 formed that even when falling off the Liquid levels of the free liquor of the treatment liquid in the trough 28 of the Radiator 32 still sufficient with treatment liquid (washing or rinsing eye or the like) to vapor bubble over the heater body 32 and to avoid overheating of this radiator 32.
  • the suction line 40 of the pump 42 is a pumping device 44 fluidly connected.
  • a Pressure line 46 On the pressure side of the pump 42 is a Pressure line 46, preferably a hose, for discharging the treatment liquid from the trough 28 and thus arranged from the entire washing machine.
  • a reflux barrier 48 In the transition between the trough 28 and the suction line 40 is a reflux barrier 48, preferably in the form of a check valve.
  • This reflux barrier 48 is automatically closed when the liquid pressure in the suction line 40 of the pumping device 44 is greater than in the trough 28. This is a backflow of Treatment liquid from the pressure line 46 with the pump 42 is switched off the pumping device 44 back into the trough 28 prevented.
  • the pressure line 46 (hose) of the pumping device 44 extends from that in the Machine bottom pump 42 is up to a height that is essential is higher than the maximum liquid level in and above the trough 28 in her resulting fluid pressure back through the shut-off pump 42 and the Suction line 40 to the remindflußsperre 48 greater than the liquid pressure in the trough 28.
  • the return valve 48 is closed even when the pump 22 of the Umpumpvortechnisch 20 treatment liquid from the trough 28 in the laundry drum 6 is recirculated while the pump 42 of the pumping device 44 is turned off.
  • the backstop can be provided, for example, by spring means be forced into the closed position, the back pressure lock in all cases automatically opens when the pump 42 of the pumping device 44 is turned on.
  • the trough 28 may be an integral part of the tub 4.
  • FIG. 2 is structurally and functionally identical to the Embodiment of Fig. 1, with the exception that the heating chamber 30 is not in one Trough of the tub 4, but by a to the lower end of the tub 4 subsequent Schuschgeophuse 50 is formed, which has a vertical Through opening 52 (preferably a longitudinal slot) with the interior of the Laugen essenceers 4 at the lower end is in flow communication.
  • the passage opening 52 has a much smaller horizontal cross section than the heating chamber 30. This avoids even more than in Fig. 1, that by rotational movements the washing drum 6 shaft movements of the treatment liquid over the Radiators 32 arise in the consideration of the minimum level to avoid overheating of the radiator would have to be considered.
  • the same parts as in Fig. 1 are provided in Fig. 2 with the same reference numerals.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Disintegrating Or Milling (AREA)

Abstract

The invention relates to a laundry treating machine. The one or more heating elements (32) are located in a heating chamber of the laundry treating machine, especially a washing machine. The heating chamber extends downwardly from the periphery of a tub (4) and is linked with a pumping device (20). The inventive laundry treating machine allows reduction of the amount of liquid required for safely covering the heating element.

Description

Die Erfindung betrifft eine Wäschebehandlungsmaschine enthaltend einen Laugenbehälter, eine Wäschestücke aufnehmende Wäschetrommel, die in dem Laugenbehälter rotierbar angeordnet ist, eine Umpumpvorrichtung mit einer Pumpe zur Rezirkulation von Wäsche-Behandlungsflüssigkeit vom unteren Ende des Laugenbehälters zurück in die Wäschetrommel, mindestens einen elektrischen Heizkörper in einer Heizkammer am unterem Teil des Laugenbehälters, eine in der Heizkammer vorgesehene Umpump-Einlassöffnung der Umpumpvorrichtung und eine Vorrichtung zum Abpumpen der nicht mehr benötigten Lauge.The invention relates to a laundry treatment machine containing a tub, a laundry absorbing laundry drum rotatable in the tub is arranged, a pumping device with a pump for recirculation of Wash treatment liquid from the bottom of the tub back into the Laundry drum, at least one electric radiator in a heating chamber at the bottom Part of the tub, a provided in the heating chamber Umpump inlet opening the Umpumpvorrichtung and a device for pumping the no longer required lye.

Eine Wäschebehandlungsmaschine ist im Rahmen der Erfindung insbesondere eine Waschmaschine, kann jedoch auch eine Maschine zum Spülen und/oder Imprägnieren von Wäschestücken sein. Diese weiteren Funktionen können auch in einer Waschmaschine integriert sein.A laundry treatment machine is in the context of the invention, in particular a Washing machine, but can also be a machine for rinsing and / or impregnation be of laundry. These other features can also be used in a washing machine be integrated.

Eine Wäschebehandlungsmaschine der vorgenannten Art ist aus der DE 3401 899 A1 bekannt. Sie zeigt eine Waschmaschine mit einem zylindrischen Laugenbehälter und mit einer koaxial darin angeordneten, rotierbaren Wäschetrommel. Die tiefste Stelle des Laugenbehätters ist mit einem unter ihr angeordneten Wasserbehälter in Strömungsverbindung, in dem ein elektrisches Heizelement angeordnet ist. An der tiefsten Stelle des Wasserbehälters befindet sich eine Umpump-Einlassöffnung einer Umpumpvorrichtung zur Rezirkulation von Lauge zurück in den Laugenbehälter in dessen oberen Bereich. Femer befindet sich im Niveau des Heizelementes am Behälter eine Abpump-Einlassöffnung einer Abpumpvorrichtung zum Abpumpen von Lauge am Ende eines Waschvorganges. In beiden Pumpvorrichtungen befindet sich je eine Pumpe.A laundry treatment machine of the aforementioned type is known from DE 3401 899 A1 known. It shows a washing machine with a cylindrical tub and with a coaxially disposed therein, rotatable laundry drum. The deepest part of the lye tank is in fluid communication with a water tank disposed below it, in which an electric heating element is arranged. At the lowest point of the Water tank is a Umpump inlet opening of a pumping device for the recirculation of liquor back into the tub in the upper area. Furthermore, at the level of the heating element on the container there is an exhaust pump inlet opening a pumping device for pumping lye at the end of a washing process. In both pumping devices is ever a pump.

Da die Umpumpvorrichtung am Boden des Wasserbehälters mündet, kann beim Umpumpvorgang das Heizelement frei liegen. Es ist daher nicht sichergestellt, dass das Laugenniveau stets ausreichend über dem elektrischen Heizelement liegt, um einen Trockenbetrieb des Heizelementes zu vermeiden. Die Pumpe der Umpumpvorrichtung dürfte aus dem Wasserbehälter unter dem Laugenbehälter nur dann Lauge saugen, wenn die Heizelemente elektrisch ausgeschaltet sind. Im Laugenbehälter soll aber möglichst nur so viel Wasser sein, wie von der Wäsche in der Trommel aufgesaugt werden kann. Dies würde bedeuten, dass das Heizelement viel zu selten eingeschaltet werden kann und der Heizvorgang daher unzumutbar lange dauern würde.Since the pumping device opens at the bottom of the water tank, can during pumping the heating element are exposed. It is therefore not certain that the Lye level is always sufficient above the electric heating element to a dry operation to avoid the heating element. The pump of the pumping device is likely from the water tank under the tub suck lye only if the Heating elements are electrically switched off. In the tub but should only possible a lot of water, as can be absorbed by the laundry in the drum. This would mean that the heating element can be switched on too rarely and the Heating process would therefore take an unreasonable time.

Aus US 4 696 171 A ist eine automatisch gesteuerte Waschmaschine bekannt, bei welcher ein elektrisches Heizelement auf der Saugseite einer Pumpe einer Umpumpvorrichtung angeordnet ist.From US 4 696 171 A an automatically controlled washing machine is known in which an electric heating element on the suction side of a pump of a pumping device is arranged.

Aus DE 43 32 225 A1 ist eine automatisch gesteuerte Waschmaschine bekannt, bei welcher ein elektrisches Heizelement auf der Druckseite einer Pumpe einer Umpumpvorrichtung angeordnet ist. Frischwasser einer Frischwasserleitung gelangt über einen Waschmittelbehällter, in welchen ein Wäschebehandlungsmittel eingegeben werden kann, in den Laugenbehälter und spült damit dieses Wäschebehandlungsmittel ebenfalls in den Laugenbehälter und durch diesen in die Wäschetrommel.From DE 43 32 225 A1 an automatically controlled washing machine is known in which an electric heating element on the pressure side of a pump of a pumping device is arranged. Fresh water of a fresh water line passes through a Waschmittelbehällter, in which a laundry treatment agent can be entered, in the tub and thus flushes this laundry treatment also in the Lye container and through this in the laundry drum.

Um die Bildung von Dampfblasen über dem Heizkörper und eine Überhitzung des Heizkörpers sowie der umliegenden Bauteile und des Waschgutes zu verhindern, muss der Heizkörper in allen Betriebssituationen ausreichend mit Wasser bedeckt sein. Dies wird üblicherweise dadurch erreicht, dass vor Beginn der Heizphase der Laugenbehälter so weit mit Wasser gefüllt wird, bis sich ein Wassemiveau einstellt, bei dem der Heizkörper mit Wasser bedeckt ist. Die Erkennung dieses Niveaus kann durch am unteren Teil des Laugenbehälters oder des Pumpensumpfes angebrachte Druckschalter, durch Messen des Staudruckes auf der Pumpendruckseite der Umpumpvorrichtung oder durch einen Paddelschalter im Strömungsweg der Umpumpvorrichtung (DE 43 32 225 A1 ) erfolgen. Ein Nachteil der bekannten Anordnungen ist, dass aufgrund der durch die Bewegung der Wäschetrommel verursachten Turbulenzen in der Waschlauge ein Laugenniveau eingestellt werden muss, welches deutlich oberhalb des Heizkörpers liegt. Eine Reduzierung der freien Flotte während der Heizphase ist daher durch dieses Niveau nach unten begrenzt. Die "freie Flotte" ist der Anteil der Waschlauge, welcher von der Wäsche nicht aufgesaugt wird.To the formation of vapor bubbles over the radiator and overheating of the radiator As well as the surrounding components and the laundry must be prevented, the Radiator must be covered with water in all operating situations. this will Usually achieved in that before the start of the heating phase of the tub so is filled with water until it reaches a water level at which the radiator covered with water. The detection of this level can be done by at the lower part of the Lye tank or pump sump mounted pressure switch, by measuring the dynamic pressure on the pump pressure side of the pumping device or by a Paddle switch in the flow path of the circulating pump (DE 43 32 225 A1) done. A disadvantage of the known arrangements is that due to the movement of the Tumble caused turbulence in the wash liquor a liquor level must be, which is clearly above the radiator. A reduction the free fleet during the heating phase is therefore limited by this level down. The "free liquor" is the proportion of the wash liquor which does not wash is sucked up.

Durch die Erfindung soll die Aufgabe gelöst werden, bei einer Wäschebehandlungsmaschine mit einer Umpumpvorrichtung zur Rezirkulation der Wäschebehandlungsflüssigkeit eine Möglichkeit zu schaffen, durch welche die frei Flotte (die nicht von den Wäschestücken aufgesaugte Flüssigkeit) reduziert werden kann unter Aufrechterhaltung einer stets ausreichenden Bedeckung des Heizkörpers mit der Flüssigkeit.By the invention, the problem to be solved in a laundry treatment machine with a pumping device for recirculation of the laundry treatment liquid to create a way through which the free fleet (which is not from the laundry items absorbed liquid) can be reduced while maintaining a constant adequate coverage of the radiator with the liquid.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, dass die Heizkammer als eine am Laugenbehälter unten angeformten Mulde ausgebildet ist, deren Seitenwände dem Heizkörper so nahe benachbart sind, dass sie im Betrieb des von Behandlungsflüssigkeit umgebenen Heizkörpers noch nicht überhitzt werden, dass die Umpump-Einlassöffnung der Umpümpvorrichtung in der Heizkammer oberhalb des mindestens einen Heizkörpers angeordnet ist und dass zwischen der Heizkammer und der Abpumpvorrichtung eine Rückflusssperre angeordnet ist, welche einen Rückfluss von der Abpumpvorrichtung in die Heizkammer verhindert.This object is achieved according to the invention in that the heating chamber as a formed on the tub bottom integrally formed trough, the side walls of the Radiators are so close to each other that they are in the operation of the treatment liquid surrounding radiator not yet overheated, that the pumping inlet opening the Umpümpvorrichtung in the heating chamber above the at least one radiator is arranged and that between the heating chamber and the pumping device a Reflux is arranged, which a return flow from the pumping device in prevents the heating chamber.

Durch die Erfindung ergibt sich der Vorteil, dass der Anteil der freien Flotte wesentlich reduziert wird und gleichzeitig die zur stets ausreichenden Bedeckung des Heizkörpers mit Flüssigkeit erforderliche Minimal-Wassermenge gesichert ist, gegenüber den Maßnahmen aus dem Stand der Technik aber dennoch reduziert werden kann.The invention provides the advantage that the proportion of the free fleet essential is reduced and at the same time to always sufficient coverage of the radiator secured with liquid required minimum amount of water, compared to the measures but can still be reduced from the prior art.

Weitere Merkmale der Erfindung sind in den Unteransprüchen enthalten.Further features of the invention are contained in the subclaims.

Gemäß einer bevorzugten Ausführungsform erstrecken sich die Seitenwände aus dem Umfangsverlauf der Wand des Laugenbehälters einstückig nach unten.According to a preferred embodiment, the side walls extend from the Circumferential course of the wall of the tub in one piece down.

Gemäß einer anderen Ausführungsform der Erfindung ist die Mulde aus einem Heizkammergehäuse gebildet, das an der Unterseite des Laugenbehälters angeformt und mit der tiefsten Stelle des Laugenbehälters durch eine Durchgangsöffnung in Strömungsverbindung gehalten ist, deren horizontaler Querschnitt wesentlich kleiner ist als der horizontale Querschnitt des Heizkammergehäuses.According to another embodiment of the invention, the trough is a heating chamber housing formed, which formed on the underside of the tub and with the lowest point of the tub through a through hole in flow communication is held, whose horizontal cross-section is substantially smaller than the horizontal Cross section of the heating chamber housing.

Gemäß bevorzugter Ausführungsform der Erfindung ist an eine tiefste Stelle der Heizkammer eine Abpump-Einlassöffnung einer Abpumpvorrichtung angeschlossen.According to a preferred embodiment of the invention is at a lowest point of the heating chamber a pump down inlet opening of a pumping device connected.

Die Rückflusssperre ist vorzugsweise ein Rückschlagventil.The non-return valve is preferably a check valve.

Gemäß der bevorzugten Ausführung sind eine elektrische Steuereinrichtung und eine Frischwasser-Zufuhrvorrichtung zur gesteuerten Zufuhr von Frischwasser in die Wäschetrommel in Abhängigkeit vom Flüssigkeitsstand in der Heizkammer vorgesehen.According to the preferred embodiment, an electrical control device and a Fresh water supply device for the controlled supply of fresh water in the laundry drum provided depending on the liquid level in the heating chamber.

Die elektrische Steuereinrichtung ist vorzugsweise ein Teil der bei Waschmaschinen vorhandenen Steuereinrichtung, welche mehrere wahlweise Waschprogamme und gegebenenfalls weitere Wäschebehandlungsprogramme beinhaltet.The electrical control device is preferably a part of existing in washing machines Control device which several optional washing programs and optionally includes further laundry treatment programs.

Die Erfindung wird im folgenden mit Bezug auf die Zeichnungen anhand einer bevorzugten Ausführungsform als Beispiel beschrieben. In den Zeichnungen zeigen

Fig. 1
schematisch eine Wäschebehandlungsmaschine nach der Erfindung,
Fig.2
schematisch eine weitere Ausführungsform einer Wäschebehandlungsmaschine nach der Erfindung,
The invention will now be described by way of example with reference to the drawings of a preferred embodiment. In the drawings show
Fig. 1
schematically a laundry treatment machine according to the invention,
Fig.2
schematically another embodiment of a laundry treatment machine according to the invention,

Die erfindungsgemäße Wäschebehandlungsmaschine ist vorzugsweise eine Waschmaschine, kann jedoch auch eine andere Maschine sein zum Spülen oder Stärken der Wäsche mit Stärkungsmittel oder anderweitigem Behandeln der Wäsche mit Flüssigkeit. Eine Waschmaschine kann alle diese Wäschebehandlungsfunktionen in Form von verschiedenen Programmen beinhalten.The laundry treating machine according to the invention is preferably a washing machine, However, it can also be another machine for rinsing or strengthening the laundry with tonic or otherwise treating the laundry with liquid. A Washing machine can do all these laundry treatment functions in the form of different Programs include.

Die Wäschebehandlungsmaschine von Fig. 1 enthält in einem Maschinengehäuse 2 einen nicht rotierenden Laugenbehälter 4 und darin eine Wäschetrommel 6, welche um eine horizontale Drehachse drehbar gelagert ist. In der Wäschetrommel 6 sind Wäschestücke 8 angedeutet, welche durch Mitnehmer 10 am Innenumfang der Wäsch-Trommel 6 beim Drehen dieser Wäschetrommel 6 angehoben werden und wieder herunterfallen. Dadurch findet ein ständiges Umschichten der Wäschestücke 8 statt.The laundry treating machine of Fig. 1 includes a machine housing 2 a non-rotating tub 4 and therein a laundry drum 6, which order a horizontal axis of rotation is rotatably mounted. In the laundry drum 6 are pieces of laundry 8 indicated, which by driver 10 on the inner circumference of the laundry drum 6 are raised when turning this laundry drum 6 and fall down again. As a result, a constant redeployment of the laundry items 8 takes place.

Frischwasser wird von einem Auf-Zu-Ventil 14 von einer Frischwasserleitung 12 durch einen Waschmittelbehälter 16, welcher Waschmittel, Spülmittel, Wäschestärkemittel oder ein anderes Wäschebehandlungsmittel enthalten kann, in die Wäsche-Trommel 6 eingeführt. Zum Steuern der Frischwasserzufuhr ist das Ventil 14 an eine elektronische Steuereinrichtung 18 angeschlossen.Fresh water is supplied from an open-close valve 14 from a fresh water line 12 a detergent container 16, which detergent, detergent, Wäschestärkemittel or may contain another laundry treatment agent introduced into the laundry drum 6. To control the supply of fresh water, the valve 14 is connected to an electronic control device 18 connected.

Zur ständigen Durchflutung der Wäschestücke 8 mit der Behandlungsflüssigkeit ist eine Umpumpvorrichtung 20 mit einer Pumpe 22, einer Saugleitung 24 auf der Saugseite und einer Druckleitung 26 auf der Druckseite der Pumpe 22 vorgesehen. Die Druckleitung 26 rezirkuliert die Behandlungsflüssigkeit vom unteren Ende der Wäschetrommel 6 bzw. des Laugenbehälters 4 zurück in die Wäschetrommel 6 auf die Wäschestücke 8.For constant flooding of the laundry items 8 with the treatment liquid is a Umpumpvorrichtung 20 with a pump 22, a suction line 24 on the suction side and a pressure line 26 on the pressure side of the pump 22 is provided. The pressure line 26 the treatment liquid recirculates from the lower end of the laundry drum 6 or the Lye container 4 back into the laundry drum 6 on the laundry items. 8

Der Laugenbehälter 4 ist an seinem unteren Ende (Boden) mit einer nach unten ausgeformten Mulde 28 versehen, die eine Heizkammer 30 bildet, in welcher mindestens ein elektrischer Heizkörper 32 angeordnet ist, vorzugsweise ein Rohr-Heizkörper. Eine Umpump-Einlaßöffnung 34 der Saugleitung 24 der Umpumpvorrichtung 20 ist in einer Seitenwand 36 so weit oberhalb des Heizkörpers 32 gebildet, daß auch beim Abfallen des Flüssigkeitsniveaus der freien Flotte der Behandlungsflüssigkeit in der Mulde 28 der Heizkörper 32 noch ausreichend mit Behandlungsflüssigkeit (Wasch- oder Spüllauge oder dergleichen) bedeckt ist, um eine Dampfblasenbildung über dem Heizkörper 32 und eine Überhitzung dieses Heizkörpers 32 zu vermeiden.The tub 4 is formed at its lower end (bottom) with a downwardly shaped Well 28 provided, which forms a heating chamber 30, in which at least one electrical heating element 32 is arranged, preferably a tubular heater. A pumped inlet port 34 of the suction line 24 of the pumping device 20 is in a side wall 36 so far above the radiator 32 formed that even when falling off the Liquid levels of the free liquor of the treatment liquid in the trough 28 of the Radiator 32 still sufficient with treatment liquid (washing or rinsing eye or the like) to vapor bubble over the heater body 32 and to avoid overheating of this radiator 32.

Wenn das Flüssigkeitsnieveau unter die Oberkante der Umpump-Einlaßöffnung 34 absinkt, sinken auch die Strömung und der Staudruck auf der Druckseite der Pumpe 22, was durch einen Sensor 38 (Druckschalter, Paddelschalter, Strömungsmesser oder dergleichen) detektiert und der Steuereinrichtung 18 mitgeteilt wird, so daß diese in Abhängigkeit hiervon jeweils so viel Frischwasser durch Öffnen und anschließendes wieder Schließen des Frischwasserventils 14 in die Wäschetrommel 6 einlaufen lassen kann, bis das Flüssigkeitsniveau über die Umpump-Einlaßöffnung 34 angestiegen ist. Damit wenig freie Flotte von Heizkörper 32 aufgeheizt werden muß, wird das Flüssigkeitsniveau in der Mulde 28 nur knapp über dem Heizkörper 32 gehalten, wobei dieses Niveau durch die Oberkante der Umpump-Einlaßöffnung 34 definiert ist. Lediglich zur Vermeidung von übermäßig kurzen Einschalt-Ausschalt-Frequenzen des Frischwasser-Ventils 14 wird das Flüssigkeitsniveau in der Mulde 28 jeweils bis zu einer Stelle knapp oberhalb der Oberkante der Umpump-Einlaßöffnung 34 gefüllt, vorzugsweise jedoch nicht über die Mulde 28 hinaus bis in den Umfangsbereich des Laugenbehälters 4.When the liquid level drops below the top of the recirculation inlet 34, the flow and the back pressure on the pressure side of the pump 22 also sink, what by a sensor 38 (pressure switch, paddle switch, flow meter or the like) detected and the controller 18 is communicated so that they depend on each of them so much fresh water by opening and then again Close the fresh water valve 14 can run into the laundry drum 6, to the liquid level has risen above the pumped-in inlet opening 34. So little free fleet of heaters 32 must be heated, the liquid level in the Mulde 28 just above the radiator 32, this level through the Upper edge of the pumped inlet port 34 is defined. Only to avoid over-short turn-off frequencies of the fresh water valve 14 is the Fluid level in the trough 28 each to a point just above the top the Umpump inlet port 34 is filled, but preferably not over the trough 28 also into the peripheral region of the tub 4.

Je kleiner der horizontale Querschnitt der Mulde 28 ist und je tiefer der Heizkörper 32 in der Mulde angeordnet ist, desto weniger entstehen variable Wellentäler und Wellenberge in der in der Mulde 28 befindlichen Flüssigkeit durch die Rotation der Wäschetrommel 6, und desto niedriger kann das Sicherheits-Flüssigkeitsniveau über dem Heizkörper 32 eingestellt werden.The smaller the horizontal cross section of the trough 28 and the lower the heater 32 in the trough is arranged, the less arise variable troughs and wave crests in the liquid located in the trough 28 by the rotation of the laundry drum 6, and the lower the safety fluid level above the radiator 32 be set.

An der tiefsten Stelle der Mulde 28 ist die Saugleitung 40 der Pumpe 42 einer Abpumpvorrichtung 44 strömungsmäßig angeschlossen. An die Druckseite der Pumpe 42 ist eine Druckleitung 46, vorzugsweise ein Schlauch, zum Ableiten der Behandlungsflüssigkeit aus der Mulde 28 und damit aus der gesamten Waschmaschine angeordnet.At the lowest point of the trough 28, the suction line 40 of the pump 42 is a pumping device 44 fluidly connected. On the pressure side of the pump 42 is a Pressure line 46, preferably a hose, for discharging the treatment liquid from the trough 28 and thus arranged from the entire washing machine.

Im Übergang zwischen der Mulde 28 und der Saugleitung 40 befindet sich eine Rückflußsperre 48, vorzugsweise in Form eines Rückschlagventils. Diese Rückflußsperre 48 ist automatisch geschlossen, wenn der Flüssigkeitsdruck in der Saugleitung 40 der Abpumpvorrichtung 44 größer ist als in der Mulde 28. Dadurch wird ein Zurückfließen von Behandlungsflüssigkeit von der Druckleitung 46 bei abgeschalteter Pumpe 42 der Abpumpvorrichtung 44 zurück in die Mulde 28 verhindert.In the transition between the trough 28 and the suction line 40 is a reflux barrier 48, preferably in the form of a check valve. This reflux barrier 48 is automatically closed when the liquid pressure in the suction line 40 of the pumping device 44 is greater than in the trough 28. This is a backflow of Treatment liquid from the pressure line 46 with the pump 42 is switched off the pumping device 44 back into the trough 28 prevented.

Die Druckleitung 46 (Schlauch) der Abpumpvorrichtung 44 erstreckt sich von der in der Maschine unten angeordneten Pumpe 42 nach oben bis zu einer Höhe, die wesentlich höher ist als das maximale Flüssigkeitsniveau in und über der Mulde 28. Dadurch ist der in ihr entstehende Flüssigkeitsdruck zurück durch die abgeschaltete Pumpe 42 und die Saugleitung 40 bis zur Rückflußsperre 48 größer als der Flüssigkeitsdruck in der Mulde 28. Damit ist die Rückflußsperre 48 auch dann geschlossen, wenn die Pumpe 22 der Umpumpvorrichtung 20 Behandlungsflüssigkeit von der Mulde 28 in die Wäschetrommel 6 rezirkuliert, während die Pumpe 42 der Abpumpvorrichtung 44 ausgeschaltet ist. Gemäß anderer Ausführungsform kann die Rückflußsperre beispielsweise durch Federmittel in Schließstellung gedrängt werden, wobei die Rückflußsperre in allen Fällen automatisch öffnet, wenn die Pumpe 42 der Abpumpvorrichtung 44 eingeschaltet wird.The pressure line 46 (hose) of the pumping device 44 extends from that in the Machine bottom pump 42 is up to a height that is essential is higher than the maximum liquid level in and above the trough 28 in her resulting fluid pressure back through the shut-off pump 42 and the Suction line 40 to the Rückflußsperre 48 greater than the liquid pressure in the trough 28. Thus, the return valve 48 is closed even when the pump 22 of the Umpumpvorrichtung 20 treatment liquid from the trough 28 in the laundry drum 6 is recirculated while the pump 42 of the pumping device 44 is turned off. According to In another embodiment, the backstop can be provided, for example, by spring means be forced into the closed position, the back pressure lock in all cases automatically opens when the pump 42 of the pumping device 44 is turned on.

Die Mulde 28 kann ein einstückiges Teil des Laugenbehälters 4 sein.The trough 28 may be an integral part of the tub 4.

Die Ausführungsform nach Fig. 2 ist konstruktiv und funktionsmäßig identisch mit der Ausführungsform von Fig. 1, mit der Ausnahme, daß die Heizkammer 30 nicht in einer Mulde des Laugenbehälters 4, sondern durch ein sich an das untere Ende des Laugenbehälters 4 anschließendes Heizkammergehäuse 50 gebildet ist, welches über eine vertikale Durchgangsöffnung 52 (vorzugsweise ein Längsschlitz) mit dem Innenraum des Laugenbehälters 4 an dessen unterem Ende in Strömungsverbindung ist. Die Durchgangsöffnung 52 hat einen wesentlich kleineren horizontalen Querschnitt als die Heizkammer 30. Dadurch wird noch mehr als in Fig. 1 vermieden, daß durch Rotationsbewegungen der Wäschetrommel 6 Wellenbewegungen der Behandlungsflüssigkeit über dem Heizkörper 32 entstehen, die bei der Berücksichtigung des Mindest-Niveaus zur Vermeidung einer Überhitzung des Heizkörpers berücksichtigt werden müßten. Dadurch kann die Heizkammer 30 von Fig. 2 eine kleinere Höhe haben als die Heizkammer 30 von Fig. 1. Damit wird aber auch die Menge an freier Flotte der Behandfungsflüssigkeit reduziert. Gleiche Teile wie in Fig. 1 sind in Fig. 2 mit gleichen Bezugszahlen versehen.The embodiment of FIG. 2 is structurally and functionally identical to the Embodiment of Fig. 1, with the exception that the heating chamber 30 is not in one Trough of the tub 4, but by a to the lower end of the tub 4 subsequent Heizkammergehäuse 50 is formed, which has a vertical Through opening 52 (preferably a longitudinal slot) with the interior of the Laugenbehälters 4 at the lower end is in flow communication. The passage opening 52 has a much smaller horizontal cross section than the heating chamber 30. This avoids even more than in Fig. 1, that by rotational movements the washing drum 6 shaft movements of the treatment liquid over the Radiators 32 arise in the consideration of the minimum level to avoid overheating of the radiator would have to be considered. This can the heating chamber 30 of Fig. 2 have a smaller height than the heating chamber 30 of Fig. 1. But also the amount of free liquor of the treatment liquid is reduced. The same parts as in Fig. 1 are provided in Fig. 2 with the same reference numerals.

Claims (6)

  1. Laundry treatment machine comprising a solution container (4), a laundry drum (6) which receives laundry articles (8) and which is rotatably arranged in the solution container, a circulatory pumping device (20) with a pump (22) for recirculation of laundry treatment liquid from the lower end of the solution container back into the laundry drum, at least one electric heating body (32) in a heating chamber (30) at the lower end of the solution container (4), a circulation pumping inlet opening (34), which is provided in the heating chamber, of the circulatory pumping device (20) and a device (44) for pumping away the solution no longer needed, characterised in that the heating chamber (30) is constructed as a trough (28) which is formed at the bottom at the solution container and the side walls (36) of which are so adjacent to the heating body (32) that they are still not overheated in operation of the heating body (32) surrounded by treatment liquid, that the circulation pumping inlet opening (34) of the circulatory pumping device (20) is arranged in the heating chamber (30) above the at least one heating body (32) and that a return flow block (48) is arranged between the heating chamber (30) and the pumping-away device (44) and prevents return flow from the pumping-away device (44) into the heating chamber (30).
  2. Laundry treatment machine according to claim 1, characterised in that the side walls (34) extend integrally in downward direction from the circumferential course of the wall of the solution container (4).
  3. Laundry treatment machine according to claim 1, characterised in that the trough (28) is formed from a heating chamber housing (50) which is integrally formed at the underside of the solution container (4) and which is kept in flow connection with the deepest point of the solution container (4) by a passage opening (52), the horizontal cross-section of which is substantially smaller than the horizontal cross-section of the heating chamber housing.
  4. Laundry treatment machine according to any one of claims 1 to 3, characterised in that a pumping-away device (44) is connected with a lowest point of the heating chamber (30).
  5. Laundry treatment machine according to claim 1 or 4, characterised in that the return flow block is a non-return valve (48).
  6. Laundry treatment machine according to any one of the preceding claims, characterised in that an electrical control device (18) and a fresh water feed device (12, 14, 16) for controlled feed of fresh water into the laundry drum (6) in dependence on the liquid state in the heating chamber (30) are provided.
EP00956360A 1999-07-30 2000-07-31 Laundry treating machine Expired - Lifetime EP1204792B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200030703T SI1204792T1 (en) 1999-07-30 2000-07-31 Laundry treating machine

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19935987A DE19935987A1 (en) 1999-07-30 1999-07-30 Laundry treatment machine
DE19935987 1999-07-30
PCT/EP2000/007389 WO2001009426A1 (en) 1999-07-30 2000-07-31 Laundry treating machine

Publications (2)

Publication Number Publication Date
EP1204792A1 EP1204792A1 (en) 2002-05-15
EP1204792B1 true EP1204792B1 (en) 2005-04-06

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EP00956360A Expired - Lifetime EP1204792B1 (en) 1999-07-30 2000-07-31 Laundry treating machine

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EP (1) EP1204792B1 (en)
AT (1) ATE292704T1 (en)
DE (2) DE19935987A1 (en)
ES (1) ES2240149T3 (en)
PL (1) PL201980B1 (en)
TR (1) TR200200031T2 (en)
WO (1) WO2001009426A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2455532A1 (en) 2010-11-22 2012-05-23 Electrolux Home Products Corporation N.V. Washing machine
WO2012069288A1 (en) 2010-11-22 2012-05-31 Electrolux Home Products Corporation N.V. Method of operating a washing machine and washing machine
EP2503050A1 (en) 2011-03-24 2012-09-26 Electrolux Home Products Corporation N.V. Washing machine comprising a filter element
EP2535454A1 (en) 2011-06-14 2012-12-19 Electrolux Home Products Corporation N.V. Washing machine
EP2570544A1 (en) 2011-09-15 2013-03-20 Electrolux Home Products Corporation N.V. Washing machine
EP2829651A3 (en) * 2013-07-04 2015-05-06 Dongbu Daewoo Electronics Corporation Washing machine and washing method thereof
DE102015212738A1 (en) 2015-07-08 2017-01-12 BSH Hausgeräte GmbH Laundry care device and laundry care process
DE102015212742A1 (en) 2015-07-08 2017-01-12 BSH Hausgeräte GmbH Laundry care device and laundry care process

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10209975A1 (en) * 2002-03-07 2003-09-25 Bsh Bosch Siemens Hausgeraete Electrically heated washing machine
KR20080087597A (en) 2007-03-27 2008-10-01 삼성전자주식회사 washer
EP2998426B1 (en) 2014-09-16 2017-11-15 Electrolux Appliances Aktiebolag Washing machiine having an improved valve/filter assembly

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Publication number Priority date Publication date Assignee Title
DE3401899A1 (en) * 1984-01-20 1985-07-25 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Drum-type washing machine for domestic use
IT1181078B (en) * 1984-11-20 1987-09-23 Zanussi Elettrodomestici WASHING MACHINE
IT1246260B (en) * 1990-07-03 1994-11-17 Zanussi Elettrodomestici WATER LOAD MEASURING DEVICE FOR WASHING MACHINES.
DE4332225B4 (en) * 1993-06-07 2006-09-28 BSH Bosch und Siemens Hausgeräte GmbH Automatically controlled washing machine

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2455532A1 (en) 2010-11-22 2012-05-23 Electrolux Home Products Corporation N.V. Washing machine
WO2012069288A1 (en) 2010-11-22 2012-05-31 Electrolux Home Products Corporation N.V. Method of operating a washing machine and washing machine
EP2762632A1 (en) 2010-11-22 2014-08-06 Electrolux Home Products Corporation N.V. Washing method
EP2503050A1 (en) 2011-03-24 2012-09-26 Electrolux Home Products Corporation N.V. Washing machine comprising a filter element
EP2535454A1 (en) 2011-06-14 2012-12-19 Electrolux Home Products Corporation N.V. Washing machine
EP2570544A1 (en) 2011-09-15 2013-03-20 Electrolux Home Products Corporation N.V. Washing machine
EP2829651A3 (en) * 2013-07-04 2015-05-06 Dongbu Daewoo Electronics Corporation Washing machine and washing method thereof
DE102015212738A1 (en) 2015-07-08 2017-01-12 BSH Hausgeräte GmbH Laundry care device and laundry care process
WO2017005382A1 (en) 2015-07-08 2017-01-12 BSH Hausgeräte GmbH Laundry care apparatus and laundry care method
DE102015212742A1 (en) 2015-07-08 2017-01-12 BSH Hausgeräte GmbH Laundry care device and laundry care process

Also Published As

Publication number Publication date
PL354460A1 (en) 2004-01-12
ES2240149T3 (en) 2005-10-16
DE19935987A1 (en) 2001-02-01
WO2001009426A1 (en) 2001-02-08
TR200200031T2 (en) 2002-05-21
ATE292704T1 (en) 2005-04-15
EP1204792A1 (en) 2002-05-15
PL201980B1 (en) 2009-05-29
DE50010001D1 (en) 2005-05-12

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