EP1204792A1 - Laundry treating machine - Google Patents
Laundry treating machineInfo
- Publication number
- EP1204792A1 EP1204792A1 EP00956360A EP00956360A EP1204792A1 EP 1204792 A1 EP1204792 A1 EP 1204792A1 EP 00956360 A EP00956360 A EP 00956360A EP 00956360 A EP00956360 A EP 00956360A EP 1204792 A1 EP1204792 A1 EP 1204792A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heating chamber
- tub
- laundry
- laundry treatment
- pumping device
- 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.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- 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 comprising a tub, a laundry drum holding items of laundry, which is rotatably arranged in the tub, a pump-around device with a pump for recirculating
- a laundry treatment machine is, in particular, one within the scope of the invention
- Washing machine can also be a machine for washing and / or impregnating laundry items. These additional functions can also be integrated in a washing machine.
- a laundry treatment machine of this type is known from EP 0 464 776 A1. It shows a washing machine with a cylindrical tub and with a rotatable laundry drum arranged coaxially therein. At least one electric heating element is arranged between the deepest point of the tub and the laundry drum. The lowest point of the tub is in flow communication with a container located below it. At the lowest point of the container there is a pump-over inlet opening of a pump-around device for the recirculation of alkali back into the suds container in the upper region thereof. Furthermore, at a deepest point in the container there is a pump-off inlet opening of a pump-off device for pumping out lye at the end of a washing process. There is a pump in each of the two devices.
- a pump-bypass inlet opening is formed in the wall of the tub, through which the pump of the pump-around device can also draw in tubing.
- a control device switches the pump of the pumping device to full load operation when the suds level in the tub is above the pump bypass inlet opening, whereas this pump is automatically switched to idle mode when the liquor level in the tub drains below the upper edge of the pump bypass inlet opening.
- the pump bypass inlet opening is located just above the lowest point of the laundry drum. This ensures that the alkali level is always sufficiently above the electrical heating element to avoid dry operation of the heating element.
- the pump of the pumping device sucks the container under the tub only when the level reaches beyond the pump bypass inlet opening.
- the control device automatically opens a fresh water supply line for supplying fresh water to the tub when the level drops below the pump bypass inlet opening. If possible, there should only be as much water in the tub as can be sucked up by the laundry in the drum.
- An automatically controlled washing machine is known from DE 43 32 225 A1, in which an electric heating element is arranged on the pressure side of a pump of a pumping device.
- Fresh water from a fresh water line passes through a detergent container into which detergent or dishwashing liquid or another laundry treatment agent can be introduced into the tub and thus also rinses this laundry treatment agent into the tub and through it into the laundry drum.
- Radiators should be adequately covered with water in all operating situations. This is usually achieved by filling the tub with water before the heating phase begins until a water level is reached at which the radiator is covered with water. This level can be detected by pressure switches attached to the lower part of the tub or the pump sump, 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 pumping device (DE 43 32 225 A1).
- a disadvantage of the known arrangements is that due to the turbulence in the wash liquor caused by the movement of the laundry drum, a lye level must be set which is clearly above the radiator. A reduction in the free liquor during the heating phase is therefore limited by this level.
- the "free liquor” is the portion of the wash liquor that is not absorbed by the laundry.
- the object of the invention is to achieve a possibility in a laundry treatment machine with a pump-around device for recirculating the laundry treatment liquid, by means of which the free liquor (the liquid not sucked up by the laundry items) can be reduced while maintaining a sufficient amount Covering the radiator with the liquid.
- This object is achieved according to the invention in that the at least one radiator is arranged in a heating chamber which has side walls which are closely adjacent to the radiator and which extend downward away from the circumferential course of the tub, and in that the inlet opening of the pumping device in the chamber is arranged above the at least one radiator.
- the invention has the advantage that the proportion of the free liquor is significantly reduced and at the same time the minimum amount of water required to always sufficiently cover the radiator with liquid can also be reduced.
- the chamber is through a in the wall of the
- Alkaline container formed, extending trough formed.
- a heating chamber housing is attached to the underside of the tub, which is in flow connection with the deepest point of the tub through a through opening.
- a discharge inlet opening of a pumping device is connected to a deepest point of the heating chamber.
- a non-return valve is preferably arranged, which opens automatically during pumping operation and is otherwise closed.
- the non-return valve is preferably a check valve.
- an electrical control device and a fresh water supply device are provided for the controlled supply of fresh water into the drum as a function of the liquid level at the pump-around inlet opening.
- the electrical control device is preferably part of the control device which is present in washing machines and which contains a number of optional washing programs and, if appropriate, further laundry treatment programs.
- 1 schematically shows a laundry treatment machine according to the invention
- 2 schematically shows a further embodiment of a laundry treatment machine according to the invention
- the laundry treatment machine according to the invention is preferably a washing machine, but can also be another machine for rinsing or strengthening the laundry with tonic or otherwise treating the laundry with liquid.
- a washing machine can incorporate all of these laundry treatment functions in the form of various programs.
- a laundry drum 6 which is rotatably mounted about a horizontal axis of rotation.
- laundry items 8 are indicated, which are lifted by carriers 10 on the inner circumference of the laundry drum 6 when this laundry drum 6 is rotated and fall down again.
- the items 8 of laundry are constantly rearranged.
- Fresh water is introduced into the laundry drum 6 from an open-close valve 14 from a fresh water line 12 through a detergent container 16, which can contain detergent, detergent, laundry starch or other laundry treatment agent.
- the valve 14 is connected to an electronic control device 18. For constant flooding of the laundry items 8 with the treatment liquid is one
- Pumping device 20 provided 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.
- the pressure line 26 recirculates the treatment liquid from the lower end of the washing drum 6 or the tub 4 back into the washing drum 6 onto the laundry items 8.
- the tub 4 is provided at its lower end (bottom) with a downwardly shaped trough 28 which forms a heating chamber 30 forms, in which at least one electric heater 32 is arranged, preferably a tubular heater.
- a pumping-over inlet opening 34 of the suction line 24 of the pumping device 20 is formed in a side wall 36 so far above the radiator 32 that even when the liquid level of the free liquor of the treatment liquid in the trough 28 drops
- Radiator 32 still sufficiently with treatment liquid (washing or rinsing solution or the like) is covered to avoid vapor bubble formation over the heater 32 and overheating of this heater 32.
- Trough 28 is held just above the radiator 32, this level being defined by the upper edge of the pumping inlet opening 34. Only in order to avoid excessively short switch-on / switch-off frequencies of the fresh water valve 14 is the liquid level in the trough 28 filled to a point just above the upper edge of the pumping inlet opening 34, but preferably not via the trough
- the suction line 40 of the pump 42 of a pumping device 44 is connected in terms of flow.
- a pressure line 46 On the pressure side of the pump 42 there is a pressure line 46, preferably a hose, for discharging the treatment liquid from the trough 28 and thus from the entire washing machine.
- non-return valve 48 In the transition between the trough 28 and the suction line 40 there is a non-return valve 48, preferably in the form of a check valve. This non-return valve 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 prevents treatment liquid from flowing back into the trough 28 from the pressure line 46 when the pump 42 of the pumping device 44 is switched off.
- the pressure line 46 (hose) of the pumping device 44 extends from the pump 42 arranged at the bottom of the machine up to a height which is essential is higher than the maximum liquid level in and above the trough 28.
- the liquid pressure arising in it through the switched-off pump 42 and the suction line 40 up to the non-return valve 48 is greater than the liquid pressure in the trough 28.
- the non-return valve 48 is also then closed when the pump 22 of the pumping device 20 treatment liquid from the trough 28 into the laundry drum
- the backflow stop can be forced into the closed position, for example by spring means, the backflow stop opening automatically in all cases when the pump 42 of the pumping device 44 is switched on.
- the trough 28 can be an integral part of the tub 4.
- heating chamber 30 is not formed in a trough of the tub 4, but by a heating chamber housing 50 adjoining the lower end of the tub 4 is, which via a vertical through opening 52 (preferably a longitudinal slot) with the interior of the
- Suds container 4 is in flow connection at its lower end.
- the passage opening 52 has a substantially smaller horizontal cross-section than the heating chamber 30. This avoids even more than in Fig. 1 that 6 rotary movements of the treatment liquid over the radiator 32 occur due to rotational movements of the washing drum, which, when taking the minimum level into account, to avoid overheating of the radiator would have to be taken into account.
- the heating chamber 30 of FIG. 2 can have a smaller height than the heating chamber 30 of FIG. 1. However, this also reduces the amount of free liquor in the treatment liquid.
- the same parts as in Fig. 1 are provided with the same reference numerals in Fig. 2.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
- Disintegrating Or Milling (AREA)
Abstract
Description
Wäschebehandlungsmaschine Laundry appliance
Die Erfindung betrifft eine Wäschebehandiungsmaschine enthaltend einen Laugenbehälter, eine Wäschestücke aufnehmende Wäschetrommel, die in dem Laugenbehälter ro- tierbar angeordnet ist, eine Umpumpvorrichtung mit einer Pumpe zur Rezirkulation vonThe invention relates to a laundry treatment machine comprising a tub, a laundry drum holding items of laundry, which is rotatably arranged in the tub, a pump-around device with a pump for recirculating
Wäsche-Behandlungsflüssigkeit vom untern Ende des Laugenbehälters zurück in die Wäschetrommel, mindestens einen elektrischen Heizkörper in einem Sumpf unter der Wäschetrommel und eine im Sumpf vorgesehene Umpump-Einlaßöffnung der Umpumpvorrichtung. Eine Wäschebehandlungsmaschine ist im Rahmen der Erfindung insbesondere eineLaundry treatment liquid from the lower end of the tub back into the laundry drum, at least one electric heating element in a sump under the laundry drum and a pumping inlet opening of the pumping device provided in the sump. A laundry treatment machine is, in particular, one within the scope of the invention
Waschmaschine, kann jedoch auch eine Maschine zum Spülen und/oder Imprägnieren von Wäschestücken sein. Diese weiteren Funktionen können auch in einer Waschmaschine integriert sein.Washing machine, but can also be a machine for washing and / or impregnating laundry items. These additional functions can also be integrated in a washing machine.
Eine Wäschebehandlungsmaschine dieser Art ist aus der EP 0 464 776 A1 bekannt. Sie zeigt eine Waschmaschine mit einem zylindrischen Laugenbehälter und mit einer koaxial darin angeordneten, rotierbaren Wäschetrommel. Zwischen der tiefsten Stelle des Laugenbehälters und der Wäschetrommel ist mindestens ein elektrisches Heizelement angeordnet. Die tiefste Stelle des Laugenbehälters ist mit einem unter ihr angeordneten Behälter in Strömungsverbindung. An der tiefsten Stelle des Behälters befindet sich eine Umpump-Einlaßöffnung einer Umpumpvorrichtung zur Rezirkulation von Lauge zurück in den Laugenbehälter in dessen oberen Bereich. Ferner befindet sich an einer tiefsten Stelle des Behälters eine Abpump-Einlaßöffnung einer Abpumpvorrichtung zum Abpumpen von Lauge am Ende eines Waschvorganges. In beiden Vorrichtungen befindet sich je eine Pumpe. In der Wand des Laugenbehälters ist eine Umpumpbypass-Einlaßöffnung gebildet, über welche die Pumpe der Umpumpvorrichtung ebenfalls Lauge ansaugen kann. Eine Steuereinrichtung schaltet die Pumpe der Umpumpvorrichtung auf Vollastbetrieb, wenn das Laugenniveau im Laugenbehälter oberhalb der Umpumpbypass- Einlaßöffnung liegt, wohingegen diese Pumpe automatisch auf Leerlaufbetrieb umgeschaltet wird, wenn das Laugenniveau im Laugenbehälter unter die Oberkante der Um- pumpbypass-Einlaßöffnung abfält. Die Umpumpbypass-Einlaßöffnung liegt knapp oberhalb der tiefsten Stelle der Wäschetrommel. Damit wird sichergestellt, daß das Laugenniveau stets ausreichend über dem elektrischen Heizelement liegt, um einen Trockenbetrieb des Heizelementes zu vermeiden. Die Pumpe der Umpumpvorrichtung saugt aus dem Behälter unter dem Laugenbehälter nur dann Lauge, wenn das Laugenniveau bis über die Umpumpbypass-Einlaßöffnung reicht. Die Steuereinrichtung öffnet automatisch jeweils dann eine Frischwasserzuleitung zur Zufuhr von Frischwasser in den Laugenbehälter, wenn das Niveau unter die Umpumpbypass-Einlaßöffnung absinkt. Im Laugenbe- hälter soll möglichst nur so viel Wasser sein, wie von der Wäsche in der Trommel aufgesaugt werden kann.A laundry treatment machine of this type is known from EP 0 464 776 A1. It shows a washing machine with a cylindrical tub and with a rotatable laundry drum arranged coaxially therein. At least one electric heating element is arranged between the deepest point of the tub and the laundry drum. The lowest point of the tub is in flow communication with a container located below it. At the lowest point of the container there is a pump-over inlet opening of a pump-around device for the recirculation of alkali back into the suds container in the upper region thereof. Furthermore, at a deepest point in the container there is a pump-off inlet opening of a pump-off device for pumping out lye at the end of a washing process. There is a pump in each of the two devices. A pump-bypass inlet opening is formed in the wall of the tub, through which the pump of the pump-around device can also draw in tubing. A control device switches the pump of the pumping device to full load operation when the suds level in the tub is above the pump bypass inlet opening, whereas this pump is automatically switched to idle mode when the liquor level in the tub drains below the upper edge of the pump bypass inlet opening. The pump bypass inlet opening is located just above the lowest point of the laundry drum. This ensures that the alkali level is always sufficiently above the electrical heating element to avoid dry operation of the heating element. The pump of the pumping device sucks the container under the tub only when the level reaches beyond the pump bypass inlet opening. The control device automatically opens a fresh water supply line for supplying fresh water to the tub when the level drops below the pump bypass inlet opening. If possible, there should only be as much water in the tub as can be sucked up by the laundry in the drum.
Aus der 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 Waschmittel oder Spülmittel oder ein anderes Wäschebehandlungsmittel eingegeben werden kann, in den Laugenbehälter und spült damit dieses Wäschebehandlungsmittel ebenfalls in den Laugenbehälter und durch diesen in die Wäschetrommel.An automatically controlled washing machine is known from DE 43 32 225 A1, in which an electric heating element is arranged on the pressure side of a pump of a pumping device. Fresh water from a fresh water line passes through a detergent container into which detergent or dishwashing liquid or another laundry treatment agent can be introduced into the tub and thus also rinses this laundry treatment agent into the tub and through it into the laundry drum.
Um die Bildung von Dampfblasen über dem Heizkörper und eine Überhitzung des Heiz- körpers sowie der umliegenden Bauteile und des Waschgutes zu verhindern, muß derTo prevent the formation of steam bubbles over the radiator and overheating of the radiator as well as the surrounding components and the laundry, the
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 Wasserniveau 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 einge- stellt 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.Radiators should be adequately covered with water in all operating situations. This is usually achieved by filling the tub with water before the heating phase begins until a water level is reached at which the radiator is covered with water. This level can be detected by pressure switches attached to the lower part of the tub or the pump sump, 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 pumping device (DE 43 32 225 A1). A disadvantage of the known arrangements is that due to the turbulence in the wash liquor caused by the movement of the laundry drum, a lye level must be set which is clearly above the radiator. A reduction in the free liquor during the heating phase is therefore limited by this level. The "free liquor" is the portion of the wash liquor that is not absorbed by the laundry.
Durch die Erfindung soll die Aufgabe gelöst werden, bei einer Wäschebehandlungsma- schine mit einer Umpumpvorrichtung zur Rezirkulation der Wäschebehandlungsflüssigkeit eine Möglichkeit zu schaffen, durch welche die frei Flotte (die nicht von den Wäschestük- ken aufgesaugte Flüssigkeit) reduziert werden kann unter Aufrechterhaltung einer stets ausreichenden Bedeckung des Heizkörpers mit der Flüssigkeit. Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß der mindestens eine Heizkörper in einer Heizkammer angeordnet ist, die dem Heizkörper nahe benachbarte Seitenwände aufweist, welche sich aus dem Umfangsverlauf des Laugenbehälters heraus nach unten weg erstrecken, und daß die Einlaßöffnung der Umpumpvorrichtung in der Kammer oberhalb des mindestens einen Heizkörpers angeordnet ist.The object of the invention is to achieve a possibility in a laundry treatment machine with a pump-around device for recirculating the laundry treatment liquid, by means of which the free liquor (the liquid not sucked up by the laundry items) can be reduced while maintaining a sufficient amount Covering the radiator with the liquid. This object is achieved according to the invention in that the at least one radiator is arranged in a heating chamber which has side walls which are closely adjacent to the radiator and which extend downward away from the circumferential course of the tub, and in that the inlet opening of the pumping device in the chamber is arranged above the at least one radiator.
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 ebenfalls reduziert werden kann.The invention has the advantage that the proportion of the free liquor is significantly reduced and at the same time the minimum amount of water required to always sufficiently cover the radiator with liquid can also be reduced.
Weitere Merkmale der Erfindung sind in den Unteransprüchen enthalten. Gemäß einer bevorzugten Ausführungsform ist die Kammer durch eine in der Wand desFurther features of the invention are contained in the subclaims. According to a preferred embodiment, the chamber is through a in the wall of the
Laugenbehälters gebildete, sich nach unten erstreckende Mulde gebildet.Alkaline container formed, extending trough formed.
Gemäß einer anderen Ausführungsform der Erfindung ist an der Unterseite des Laugenbehälters ein Heizkammergehäuse befestigt, welches mit der tiefsten Stelle des Laugenbehälters durch eine Durchgangsöffnung in Strömungsverbindung ist. Gemäß bevorzugter Ausführungsform der Erfindung ist an eine tiefste Stelle der Heizkammer eine Abputnp-Einlaßöffnung einer Abpumpvorrichtung angeschlossen.According to another embodiment of the invention, a heating chamber housing is attached to the underside of the tub, which is in flow connection with the deepest point of the tub through a through opening. According to a preferred embodiment of the invention, a discharge inlet opening of a pumping device is connected to a deepest point of the heating chamber.
Zwischen der Heizkammer und der Abpumpvorrichtung ist vorzugsweise eine Rückflußsperre angeordnet, welche automatisch bei Abpumpbetrieb öffnet und ansonsten geschlossen ist. Die Rückflußsperre ist vorzugsweise eine Rückschlagventil.Between the heating chamber and the pumping device, a non-return valve is preferably arranged, which opens automatically during pumping operation and is otherwise closed. The non-return valve is preferably a check valve.
Gemäß der bevorzugten Ausführung sind eine elektrische Steuereinrichtung und eine Frischwasser-Zufuhrvorrichtung vorgesehen zur gesteuerten Zufuhr von Frischwasser in die Trommel in Abhängigkeit vom Flüssigkeitsstand an der Umpump-Einlaßöffnung.According to the preferred embodiment, an electrical control device and a fresh water supply device are provided for the controlled supply of fresh water into the drum as a function of the liquid level at the pump-around inlet opening.
Die elektrische Steuereinrichtung ist vorzugsweise ein Teil der bei Waschmaschinen vor- handenen Steuereinrichtung, welche mehrere wahlweise Waschprogamme und gegebenenfalls weitere Wäschebehandlungsprogramme beinhaltet.The electrical control device is preferably part of the control device which is present in washing machines and which contains a number of optional washing programs and, if appropriate, further laundry treatment programs.
Die Erfindung wird im folgenden mit Bezug auf die Zeichnungen anhand einer bevorzugten Ausführungsform als Beispiel beschrieben. In den Zeichnungen zeigenThe invention is described below with reference to the drawings using a preferred embodiment as an example. Show in the drawings
Fig. 1 schematisch eine Wäschebehandlungsmaschine nach der Erfindung, Fig.2 schematisch eine weitere Ausführungsform einer Wäschebehandlungsmaschine nach der Erfindung,1 schematically shows a laundry treatment machine according to the invention, 2 schematically shows a further embodiment of a laundry treatment machine according to the invention,
Die erfindungsgemäße Wäschebehandlungsmaschine ist vorzugsweise eine Waschma- schine, 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 treatment machine according to the invention is preferably a washing machine, but can also be another machine for rinsing or strengthening the laundry with tonic or otherwise treating the laundry with liquid. A washing machine can incorporate all of these laundry treatment functions in the form of various programs.
Die Wäschebehandlungsmaschine von Fig. 1 enthält in einem Maschinengehäuse 2 ei- nen 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. Frischwasser wird von einem Auf-Zu-Ventil 14 von einer Frischwasserleitung 12 durch einen Waschmittelbehälter 16, welcher Waschmittel, Spülmittel, Wäschestärkemittel oder ein anderes Wäschebehandiungsmittel enthalten kann, in die Wäsche-Trommel 6 eingeführt. Zum Steuern der Frischwasserzufuhr ist das Ventil 14 an eine elektronische Steuereinrichtung 18 angeschlossen. Zur ständigen Durchflutung der Wäschestücke 8 mit der Behandlungsflüssigkeit ist eine1 contains in a machine housing 2 a non-rotating tub 4 and therein a laundry drum 6 which is rotatably mounted about a horizontal axis of rotation. In the laundry drum 6, laundry items 8 are indicated, which are lifted by carriers 10 on the inner circumference of the laundry drum 6 when this laundry drum 6 is rotated and fall down again. As a result, the items 8 of laundry are constantly rearranged. Fresh water is introduced into the laundry drum 6 from an open-close valve 14 from a fresh water line 12 through a detergent container 16, which can contain detergent, detergent, laundry starch or other laundry treatment agent. To control the fresh water supply, the valve 14 is connected to an electronic control device 18. For constant flooding of the laundry items 8 with the treatment liquid is one
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. 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 Behandiungsflüssigkeit in der Mulde 28 derPumping device 20 provided 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. The pressure line 26 recirculates the treatment liquid from the lower end of the washing drum 6 or the tub 4 back into the washing drum 6 onto the laundry items 8. The tub 4 is provided at its lower end (bottom) with a downwardly shaped trough 28 which forms a heating chamber 30 forms, in which at least one electric heater 32 is arranged, preferably a tubular heater. A pumping-over inlet opening 34 of the suction line 24 of the pumping device 20 is formed in a side wall 36 so far above the radiator 32 that even when the liquid level of the free liquor of the treatment liquid in the trough 28 drops
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.Radiator 32 still sufficiently with treatment liquid (washing or rinsing solution or the like) is covered to avoid vapor bubble formation over the heater 32 and overheating of this heater 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 derWhen the liquid level drops below the upper edge of the pumping inlet opening 34, the flow and the dynamic pressure on the pressure side of the pump 22 also decrease, which is detected by a sensor 38 (pressure switch, paddle switch, flow meter or the like) and is communicated to the control device 18, so that, depending on this, as much fresh water can run into the washing drum 6 by opening and then closing the fresh water valve 14 again until the liquid level has risen via the pumping inlet opening 34. So that little free fleet of radiators 32 must be heated, the liquid level in the
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 Ober- kante der Umpump-Einlaßöffnung 34 gefüllt, vorzugsweise jedoch nicht über die MuldeTrough 28 is held just above the radiator 32, this level being defined by the upper edge of the pumping inlet opening 34. Only in order to avoid excessively short switch-on / switch-off frequencies of the fresh water valve 14 is the liquid level in the trough 28 filled to a point just above the upper edge of the pumping inlet opening 34, but preferably not via the trough
28 hinaus bis in den Umfangsbereich des Laugenbehälters 4.28 into the peripheral area 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 deeper the heating element 32 is arranged in the trough, the less variable wave troughs and wave peaks arise in the liquid in the trough 28 due to the rotation of the washing drum 6, and the lower the safety Liquid level can be set above the radiator 32.
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 of a pumping device 44 is connected in terms of flow. On the pressure side of the pump 42 there is a pressure line 46, preferably a hose, for discharging the treatment liquid from the trough 28 and thus 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 there is a non-return valve 48, preferably in the form of a check valve. This non-return valve 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 prevents treatment liquid from flowing back into the trough 28 from the pressure line 46 when the pump 42 of the pumping device 44 is switched off.
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 WäschetrommelThe pressure line 46 (hose) of the pumping device 44 extends from the pump 42 arranged at the bottom of the machine up to a height which is essential is higher than the maximum liquid level in and above the trough 28. As a result, the liquid pressure arising in it through the switched-off pump 42 and the suction line 40 up to the non-return valve 48 is greater than the liquid pressure in the trough 28. Thus, the non-return valve 48 is also then closed when the pump 22 of the pumping device 20 treatment liquid from the trough 28 into the laundry drum
6 rezirkuliert, während die Pumpe 42 der Abpumpvorrichtung 44 ausgeschaltet ist. Gemäß anderer Ausführungsform kann die Rückfiußsperre beispielsweise durch Federmittel in Schließstellung gedrängt werden, wobei die Rückflußsperre in allen Fällen automatisch öffnet, wenn die Pumpe 42 der Abpumpvorrichtung 44 eingeschaltet wird. Die Mulde 28 kann ein einstückiges Teil des Laugenbehälters 4 sein.6 recirculates while the pump 42 of the pumping device 44 is switched off. According to another embodiment, the backflow stop can be forced into the closed position, for example by spring means, the backflow stop opening automatically in all cases when the pump 42 of the pumping device 44 is switched on. The trough 28 can 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 verti- kale Durchgangsöffnung 52 (vorzugsweise ein Längsschlitz) mit dem Innenraum des2 is structurally and functionally identical to the embodiment of FIG. 1, with the exception that the heating chamber 30 is not formed in a trough of the tub 4, but by a heating chamber housing 50 adjoining the lower end of the tub 4 is, which via a vertical through opening 52 (preferably a longitudinal slot) with the interior of the
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 Behandlungsflüssigkeit reduziert. Gleiche Teile wie in Fig. 1 sind in Fig. 2 mit gleichen Bezugszahlen versehen. Suds container 4 is in flow connection at its lower end. The passage opening 52 has a substantially smaller horizontal cross-section than the heating chamber 30. This avoids even more than in Fig. 1 that 6 rotary movements of the treatment liquid over the radiator 32 occur due to rotational movements of the washing drum, which, when taking the minimum level into account, to avoid overheating of the radiator would have to be taken into account. As a result, the heating chamber 30 of FIG. 2 can have a smaller height than the heating chamber 30 of FIG. 1. However, this also reduces the amount of free liquor in the treatment liquid. The same parts as in Fig. 1 are provided with the same reference numerals in Fig. 2.
Claims
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 |
|---|---|---|---|
| DE19935987 | 1999-07-30 | ||
| DE19935987A DE19935987A1 (en) | 1999-07-30 | 1999-07-30 | Laundry treatment machine |
| PCT/EP2000/007389 WO2001009426A1 (en) | 1999-07-30 | 2000-07-31 | Laundry treating machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1204792A1 true EP1204792A1 (en) | 2002-05-15 |
| EP1204792B1 EP1204792B1 (en) | 2005-04-06 |
Family
ID=7916679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00956360A Expired - Lifetime EP1204792B1 (en) | 1999-07-30 | 2000-07-31 | Laundry treating machine |
Country Status (7)
| Country | Link |
|---|---|
| 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 (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2455533A1 (en) | 2010-11-22 | 2012-05-23 | Electrolux Home Products Corporation N.V. | Method of operating a washing machine and washing machine |
| EP2455532A1 (en) | 2010-11-22 | 2012-05-23 | Electrolux Home Products Corporation N.V. | Washing machine |
| EP2998426A1 (en) | 2014-09-16 | 2016-03-23 | Electrolux Appliances Aktiebolag | Washing machiine having an improved valve/filter assembly |
| US10000885B2 (en) | 2013-07-04 | 2018-06-19 | Dongbu Daewoo Electronics Corporation | Washing machine and washing method thereof |
Families Citing this family (7)
| 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 |
| EP2503050B1 (en) | 2011-03-24 | 2013-12-18 | Electrolux Home Products Corporation N.V. | Washing machine comprising a filter element |
| EP2535454B1 (en) | 2011-06-14 | 2021-05-12 | Electrolux Home Products Corporation N.V. | Washing machine |
| EP2570544A1 (en) * | 2011-09-15 | 2013-03-20 | Electrolux Home Products Corporation N.V. | Washing machine |
| DE102015212742A1 (en) | 2015-07-08 | 2017-01-12 | BSH Hausgeräte GmbH | Laundry care device and laundry care process |
| DE102015212738A1 (en) | 2015-07-08 | 2017-01-12 | BSH Hausgeräte GmbH | Laundry care device and laundry care process |
Family Cites Families (4)
| 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 |
-
1999
- 1999-07-30 DE DE19935987A patent/DE19935987A1/en not_active Withdrawn
-
2000
- 2000-07-31 PL PL354460A patent/PL201980B1/en not_active IP Right Cessation
- 2000-07-31 EP EP00956360A patent/EP1204792B1/en not_active Expired - Lifetime
- 2000-07-31 DE DE50010001T patent/DE50010001D1/en not_active Expired - Lifetime
- 2000-07-31 WO PCT/EP2000/007389 patent/WO2001009426A1/en not_active Ceased
- 2000-07-31 TR TR2002/00031T patent/TR200200031T2/en unknown
- 2000-07-31 ES ES00956360T patent/ES2240149T3/en not_active Expired - Lifetime
- 2000-07-31 AT AT00956360T patent/ATE292704T1/en not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0109426A1 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2455533A1 (en) | 2010-11-22 | 2012-05-23 | Electrolux Home Products Corporation N.V. | Method of operating a washing machine and washing machine |
| EP2455532A1 (en) | 2010-11-22 | 2012-05-23 | Electrolux Home Products Corporation N.V. | Washing machine |
| US9702079B2 (en) | 2010-11-22 | 2017-07-11 | Electrolux Home Products Corporation N.V. | Washing machine with recirculation circuit |
| US10000885B2 (en) | 2013-07-04 | 2018-06-19 | Dongbu Daewoo Electronics Corporation | Washing machine and washing method thereof |
| EP2998426A1 (en) | 2014-09-16 | 2016-03-23 | Electrolux Appliances Aktiebolag | Washing machiine having an improved valve/filter assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| PL354460A1 (en) | 2004-01-12 |
| TR200200031T2 (en) | 2002-05-21 |
| DE50010001D1 (en) | 2005-05-12 |
| WO2001009426A1 (en) | 2001-02-08 |
| ATE292704T1 (en) | 2005-04-15 |
| EP1204792B1 (en) | 2005-04-06 |
| PL201980B1 (en) | 2009-05-29 |
| ES2240149T3 (en) | 2005-10-16 |
| DE19935987A1 (en) | 2001-02-01 |
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