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EP0268155A2 - Washing machine with a device for preventing the formation of foam - Google Patents

Washing machine with a device for preventing the formation of foam Download PDF

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Publication number
EP0268155A2
EP0268155A2 EP87116306A EP87116306A EP0268155A2 EP 0268155 A2 EP0268155 A2 EP 0268155A2 EP 87116306 A EP87116306 A EP 87116306A EP 87116306 A EP87116306 A EP 87116306A EP 0268155 A2 EP0268155 A2 EP 0268155A2
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EP
European Patent Office
Prior art keywords
washing
washing machine
machine according
speed
drum
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
Application number
EP87116306A
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German (de)
French (fr)
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EP0268155A3 (en
EP0268155B1 (en
Inventor
Franz-Josef Ing. Wipperfürth (grad.)
Irmgard Ing.(Grad.) Rothmund
Hildegard Kraft
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Licentia Patent Verwaltungs GmbH
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Licentia Patent Verwaltungs GmbH
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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 
    • D06F39/06—Arrangements for preventing or destroying scum

Definitions

  • the invention relates to a program-controlled washing machine according to the preamble of claim 1.
  • Washing machines of this type are generally known.
  • the washware in order to reduce the wash liquor still contained in the washware after each wash cycle and thus to increase the efficiency of this wash cycle, the washware is spun at the end of each wash cycle.
  • the laundry drum containing the laundry is operated during the spin cycle at a high rotational speed, which is approximately in the order of magnitude of 800 to 1200 rpm.
  • the mixture of water and detergent that is expelled from the laundry or spun material and passes through the perforated drum jacket often creates foam in the tub after a spin cycle of a few seconds, which can lead to an interruption the work of the drain pump.
  • the invention has for its object to improve a program-controlled washing machine of the type mentioned in such a way that at the earliest possible time after completion of the washing process with the maximum possible drum speed, the laundry without the risk of foaming in the suds container which hinders the further pumping out of the washing liquor can be thrown.
  • the laundry drum of a washing machine is referred to, which is rotatably housed in a tub 2 (washing tub).
  • the laundry drum 1 is provided in the usual manner on its entire outer surface with perforations for the passage of water or washing and rinsing liquor and is motorized can be driven either in the wash cycle or in the spin cycle.
  • This laundry drum can therefore also perform the spin cycle of the laundry, which usually ends a washing program or rinsing program.
  • the perforated laundry drum 1 containing the laundry is partially immersed in the wash liquor (wash liquor, rinsing water) present in the tub.
  • the drive motor 5 and thus the drive 6 for the laundry drum 1 are controlled via an electrical regulating and control unit 7.
  • a measuring pipeline 8 goes from the drain line 3, which is based on the water pressure in the Contains drum or the detergent appealing measuring device 9 for the liquor level in the tub 2 contains.
  • An analog or pneumatic pressure sensor advantageously serves as the measuring device 9. It would also be conceivable to use a pressure-independent device as the measuring device for detecting the foam limit.
  • the regulating and control unit 7 is preceded by a level comparator 10 and a control element 11 influencing the current for the drive motor is connected downstream.
  • the Nieveau comparator 10 receives its data from the analog pressure sensor 9 (measuring device), the output signals (level signals) of which are an indication of the foam formation or the foam development during the spinning process. These output signals represent a controlled variable for the drive motor 5 of the laundry drum 1 and thus for the regulation or influencing of the spin speed.
  • the aim is to ensure that the laundry can be dewatered as soon as possible at the earliest possible time after completion of the washing process with the maximum possible laundry drum speed, irrespective of the particular type and amount of laundry as well as the type and amount of detergent is without swirling existing wash liquor from the last wash cycle. This prevents excessive foam from forming in the laundry drum. It follows the advantageous possibility that now a complete pumping of the residual liquor can be carried out and a good rinsing effect can be achieved with reduced water consumption.
  • the initially low initial spin speed for the washing drum after the gentle start is increased in small steps, e.g. B. 50 rpm only increased if no increase in the drum water pressure is measured or registered via the analog pressure sensor 9 connected in parallel with the liquor or lye level, and consequently also no further increase or increase in the Foaming is present, which means that an existing certain low foam limit in the laundry drum for a certain period of z. B. is equal to or falls below a second.
  • a certain critical foam limit is not exceeded at a drum speed of around 100 rpm or when the centrifugal setpoint is activated, the spinning process is stopped immediately and a rinsing process is repeated or interposed.
  • the analog pressure sensor 9 used in the washing machine described makes it possible to detect all washing levels, ie any level between 35 mm water column (foam level limit) and 300 mm water column (safety level limit) can be controlled.
  • the spin cycle is also interrupted and the amount of rinsing water in the subsequent rinse cycle is increased if the foam limit is no longer undershot at a predetermined or specified washing drum speed. Furthermore, the spin cycle is interrupted and the duration of the rinse cycle of the subsequent rinse cycle is extended and / or the reversing process (movement mechanism for shifting the items to be washed) is increased during the subsequent rinse cycle if the foam limits are no longer undershot at a predetermined wash drum speed.
  • a further process step is that the washing drum speed is reduced until the washing drum comes to a standstill when the foam is present and then accelerated again to at least 100 rpm for a predetermined or specified period of time.
  • This washing drum speed reduction u. Acceleration is expediently repeated several times, although the number of these repetitions is limited depending on the type of laundry or washing program selection.
  • the predetermined laundry drum speed reduction steps and / or laundry drum speed acceleration steps can, depending on the type of laundry, program selection and / or number of spin cycle value additions, be appropriately multiplied by a corresponding factor.
  • the laundry drum speed reduction and / or acceleration can be increased degressively or progressively.
  • the program-specific spin duration in the individual processes shown is only started when a predetermined or specified washing drum minimum speed and / or minimum startup period has been exceeded.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

During the spinning operation, foam is often produced in the lye container for the washing drum after a spinning time of a few seconds from a mixture of water and washing agents which is expelled from the material being spun, and this can sometimes lead to an interruption of the work of the emptying pump. 2.2 So that spinning can be carried out as soon as possible after completion of the washing operation at the maximum possible washing- drum speed of the material being washed or spun, without the danger of the formation of foam in the lye container to prevent the further pumping away of the washing lye, there is provided as a measuring device a pressure sensor, the output signals of which are an indication of the foam formation during the spinning operation, these output signals representing control variables for the drive motor of the washing drum and therefore for the regulation of the spinning speed. 2.3 Program-controlled washing machine with a washing drum driveable in the washing and spinning mode by means of a motor. <IMAGE>

Description

Die Erfindung betrifft eine programmgesteuerte Waschmaschine nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a program-controlled washing machine according to the preamble of claim 1.

Waschmaschinen dieser Art sind allgemein bekannt. Bei solchen Waschmaschinen wird, um die im Waschgut nach jedem Spülgang noch enthaltende Waschlauge zu verringern und damit den Wirkungsgrad dieses Arbeitsganges zu erhöhen, das Waschgut am Ende eines jeden Spülganges geschleudert. Die das Waschgut enthaltende Wäschetrommel wird beim Schleudervorgang mit hoher Umdrehungsgeschwindigkeit betrieben, die etwa in der Größenordnung von 800 bis 1200 U/min liegt. Während des Schleudervorganges entwickelt sich nun aber aus dem Gemisch von Wasser und Waschmitteln, das aus dem Wasch- bzw. Schleudergut ausgetrieben wird und durch den perforierten Wäschetrommelmantel hindurchtritt, im Laugenbehälter schon nach einer Schleuderdauer von einigen Sekunden oftmals Schaum, was unter Umständen zu einer Unterbrechung der Arbeit der Entleerungspumpe führen kann.Washing machines of this type are generally known. In such washing machines, in order to reduce the wash liquor still contained in the washware after each wash cycle and thus to increase the efficiency of this wash cycle, the washware is spun at the end of each wash cycle. The laundry drum containing the laundry is operated during the spin cycle at a high rotational speed, which is approximately in the order of magnitude of 800 to 1200 rpm. However, during the spin cycle, the mixture of water and detergent that is expelled from the laundry or spun material and passes through the perforated drum jacket often creates foam in the tub after a spin cycle of a few seconds, which can lead to an interruption the work of the drain pump.

Der Erfindung liegt die Aufgabe zugrunde, eine programmgesteuerte Waschmaschine der eingangs genannten Art so zu verbessern, daß zu einem möglichst frühen Zeitpunkt nach Beendigung des Waschvorganges mit der maximal möglichen Wäschetrommel-Drehzahl das Waschgut ohne der Gefahr einer das weitere Abpumpen der Waschlauge behindernden Schaumbildung im Laugenbehälter geschleudert werden kann.The invention has for its object to improve a program-controlled washing machine of the type mentioned in such a way that at the earliest possible time after completion of the washing process with the maximum possible drum speed, the laundry without the risk of foaming in the suds container which hinders the further pumping out of the washing liquor can be thrown.

Die Lösung dieser Aufgabe gemäß der Erfindung ist dem kennzeichnenden Teil des Patentanspruchs 1 zu entnehmen.
Vorteilhafte weitere Ausgestaltungen des Gegenstandes der Erfindung sind in den Unteransprüchen angegeben.The solution to this problem according to the invention can be found in the characterizing part of patent claim 1.
Advantageous further developments of the subject matter of the invention are specified in the subclaims.

Die mit der Erfindung erzielbaren Vorteile sind darin zu sehen, daß nur dann auf eine höhere Schleuderdrehzahl hochgefahren wird, wenn praktisch keine nennenswerte Schaumbildung gegeben ist und daß bei einer Schaumentwicklung eine automatische Drehzahlanpassung für die Wäschetrommel vorgenommen wird. Daraus ergibt sich der weitere Vorteil, daß der Schleuderhochlauf ohne sog. Wasserpanschen in der Wäschetrommel abläuft, was eine erhebliche Geräuschverminderung zur Folge hat. Durch das Erfassen bzw. Abfragen der jeweiligen Schaumgrenze ist ein rein funktionsabhängiges Abpumpen der Lauge möglich, wodurch eine optimale Entwässerung und damit ausgezeichnete Spülwirkung erreicht wird. Infolge der erreichten verbesserten Abpumpleistung und guten Entwässerung des Waschgutes ist ein äußerst schnelles Hochfahren auf die maximalste Schleuderdrehzahl von z. B. 850 Grad U/min möglich.The advantages that can be achieved with the invention are to be seen in the fact that the spin-up speed is increased only when there is practically no appreciable foam formation, and in the case of foam development, an automatic speed adjustment for the laundry drum is carried out. This has the further advantage that the centrifugal run-up takes place in the washing drum without so-called water panches, which results in a considerable reduction in noise. By recording or querying the respective foam limit, a purely function-dependent pumping out of the alkali is possible, as a result of which optimal dewatering and thus an excellent rinsing effect are achieved. As a result of the improved pumping performance and good dewatering of the items to be washed, an extremely rapid ramp-up to the maximum spin speed of e.g. B. 850 degrees U / min possible.

Anhand eines in der Zeichnung veranschaulichten Ausführungsbeispieles wird die Erfindung nachfolgend näher beschrieben.The invention is described in more detail below using an exemplary embodiment illustrated in the drawing.

Es zeigen:

  • Fig. 1 in vereinfachter Darstellung eine Waschmaschine mit einer die Schaumbildung in der Wäschetrommel erfaßenden Meßeinrichtung und die Waschtrommelmotorsteuerung,
  • Fig. 2 ein Flußdiagramm, das die Reihenfolge der Verfahrensschritte einer Ausführungsform der Erfindung zeigt.
Show it:
  • 1 is a simplified illustration of a washing machine with a measuring device which detects the formation of foam in the laundry drum and the washing drum motor control,
  • Fig. 2 is a flow chart showing the order of the process steps of an embodiment of the invention.

Mit 1 ist die Wäschetrommel einer nicht weiter dargestellten Waschmaschine bezeichnet, die in einem Laugenbehälter 2 (Waschbottich) drehbar untergebracht ist. Die Wäschetrommel 1 ist in üblicher Weise auf ihrer gesamten Mantelfläche mit Perforierungen für den Durchtritt von Wasser bzw. Wasch- und Spüllauge versehen und ist motorisch wahlweise im Waschgang oder im Schleudergang antreibbar. Diese Wäschetrommel kann damit auch das ein Waschprogramm oder Spülprogramm in der Regel beendigende Schleudern der Wäsche vornehmen. Vom Boden des Laugenbehälters 2 geht eine Ablaufleitung 3 mit einer zwischengeschalteten Entleerungspumpe 4 ab. Nach der Entleerungspumpe 4 geht die Ablaufleitung 3 in eine Abflußsteigleitung 3ʹ über. Während des gesamten Wasch- und auch Spülvorganges ist die das Waschgut enthaltende perforierte Wäschetrommel 1 in der im Laugenbehälter anstehenden Waschflotte (Waschlauge, Spülwasser) zum Teil eingetaucht. Gesteuert wird der Antriebsmotor 5 und damit der Antrieb 6 für die Wäschetrommel 1 über eine elektrische Regel- und Steuereinheit 7. Zwischen der Entleerungspumpe 4 und dem Laugenbehälter 2 geht von der Ablaufleitung 3 eine Meß-Rohrleitung 8 ab, welche eine auf den Wasserdruck in der Wäschetrommel bzw. des Laugenbehälters ansprechende Meßeinrichtung 9 für den Flottenstand im Laugenbehälter 2 enthält. Als Meßeinrichtung 9 dient in vorteilhafter Weise ein analoger oder pneumatischer Drucksensor. Es wäre auch denkbar, als Meßeinrichtung zur Erfassung der Schaumgrenze eine druckunabhängige Einrichtung zu verwenden. Der Regel- und Steuereinheit 7 ist ein Niveau-Komparator 10 vorgeschaltet sowie ein den Strom für den Antriebsmotor beeiflußendes Steuerglied 11 nachgeschaltet. Der Nieveau-Komparator 10 erhält seine Daten von dem analogen Drucksensor 9 (Meßeinrichtung), dessen Ausgangssignale (Niveausignale) ein Indiz für die Schaumbildung bzw. die Schaumentwicklung während des Schleudervorganges sind. Diese Ausgangssignale stellen eine Regelgröße für den Antriebsmotor 5 der Wäschetrommel 1 und damit für die Regelung bzw. Beeinflussung der Schleuderdrehzahl dar.With 1 the laundry drum of a washing machine, not shown, is referred to, which is rotatably housed in a tub 2 (washing tub). The laundry drum 1 is provided in the usual manner on its entire outer surface with perforations for the passage of water or washing and rinsing liquor and is motorized can be driven either in the wash cycle or in the spin cycle. This laundry drum can therefore also perform the spin cycle of the laundry, which usually ends a washing program or rinsing program. From the bottom of the tub 2 there is a drain line 3 with an intermediate drain pump 4. After the drain pump 4, the drain line 3 passes into a drain line 3ʹ. During the entire washing and also rinsing process, the perforated laundry drum 1 containing the laundry is partially immersed in the wash liquor (wash liquor, rinsing water) present in the tub. The drive motor 5 and thus the drive 6 for the laundry drum 1 are controlled via an electrical regulating and control unit 7. Between the drain pump 4 and the tub 2, a measuring pipeline 8 goes from the drain line 3, which is based on the water pressure in the Contains drum or the detergent appealing measuring device 9 for the liquor level in the tub 2 contains. An analog or pneumatic pressure sensor advantageously serves as the measuring device 9. It would also be conceivable to use a pressure-independent device as the measuring device for detecting the foam limit. The regulating and control unit 7 is preceded by a level comparator 10 and a control element 11 influencing the current for the drive motor is connected downstream. The Nieveau comparator 10 receives its data from the analog pressure sensor 9 (measuring device), the output signals (level signals) of which are an indication of the foam formation or the foam development during the spinning process. These output signals represent a controlled variable for the drive motor 5 of the laundry drum 1 and thus for the regulation or influencing of the spin speed.

Mit der beschriebenen Meßeinrichtung 9 und der Regel- und Steuereinheit 7 soll erreicht werden, daß zu einem möglichst frühen Zeitpunkt nach Beendigung des Waschvorganges mit der maximal möglichen Wäschetrommel-Drehzahl das Waschgut unabhängig von der jeweiligen Wäscheart und Wäschemenge sowie Waschmittelart und Waschmittelmenge soweit wie möglich entwässerbar ist, ohne daß dabei vom letzen Waschgang her vorhandene Waschlauge verwirbelt wird. Damit wird verhindert, daß sich in der Wäschetrommel übermäßig Schaum bilden kann. Daraus ergibt sich die vorteilhafte Möglichkeit, daß nunmehr auch ein vollständiges Abpumpen der Restlauge durchführbar ist und eine gute Spülwirkung bei verminderten Wasserverbrauch erreichbar ist.With the described measuring device 9 and the regulating and control unit 7, the aim is to ensure that the laundry can be dewatered as soon as possible at the earliest possible time after completion of the washing process with the maximum possible laundry drum speed, irrespective of the particular type and amount of laundry as well as the type and amount of detergent is without swirling existing wash liquor from the last wash cycle. This prevents excessive foam from forming in the laundry drum. It follows the advantageous possibility that now a complete pumping of the residual liquor can be carried out and a good rinsing effect can be achieved with reduced water consumption.

Die Arbeitsweise der beschriebenen Waschmaschine mit sog. Schaumbremse ist nach dem Flußdiagramm nun folgende:The operation of the washing machine described with so-called foam brake is now as follows according to the flow diagram:

Um zu verhindern, daß sich nach Beginn bzw. nach Einsetzen des Schleudervorganges in der Wäschetrommel 1 übermäßig Schaum bilden kann, wird die zunächst niedere Anfangsschleuderdrehzahl für die Wäschetrommel nach dem Sanftanlauf in kleinen Schritten, von z. B. 50 U/min nur dann erhöht, wenn über den parallel zum Flotten- bzw. Laugenniveau angeschlossenen analogen Drucksensor 9 in der Meß-Rohrleitung 8 keine Erhöhung des Trommelwasserdruckes gemessen bzw. registriert wird und damit folglich auch keine weitere Erhöhung bzw. Steigerung der Schaumbildung vorliegt, d. h., daß eine vorhandene bestimmte niedere Schaumgrenze in der Wäschetrommel während einer bestimmten Zeitdauer von z. B. einer Sekunde gleich bzw. unterschritten ist. Wird jedoch die Schaumgrenze in der Wäschetrommel bzw. des Laugenbehälters längere Zeit nicht unterschritten, so wird die Drehzahl des Wäschetrommelantriebsmotors 5 über die beschriebene Regel- und Steuereinheit 7 in Verbindung mit dem Steuerglied 11 in kleinen Schritten, von z. B. 50 U/min, solange reduziert, bis sich die Schaumgrenze wieder auf ein bestimmtes niedriges Niveau eingestellt hat und bleibend unterschritten wird. Sollte jedoch aber eine bestimmte kritische Schaumgrenze schon bei einer Trommel-Drehzahl von etwa 100 U/min oder bei der Schleudersollwertaufschaltung nicht mehr unterschritten werden, so wird der Schleudervorgang umgehend abgebrochen und ein Spülvorgang wiederholt bzw. zwischengeschaltet. Der bei der beschriebenen Waschmaschine eingesetzte analoge Drucksensor 9 ermöglicht es, daß damit alle Waschniveaus erfaßt werden können, d. h. jedes Niveau zwischen 35 mm Wassersäule (Schaumniveaugrenze) und 300 mm Wassersäule (Sicherheitsniveaugrenze) ist ansteuerbar.To prevent excessive foam from forming in the washing drum 1 after the start or after the spinning process has started, the initially low initial spin speed for the washing drum after the gentle start is increased in small steps, e.g. B. 50 rpm only increased if no increase in the drum water pressure is measured or registered via the analog pressure sensor 9 connected in parallel with the liquor or lye level, and consequently also no further increase or increase in the Foaming is present, which means that an existing certain low foam limit in the laundry drum for a certain period of z. B. is equal to or falls below a second. However, if the foam limit in the laundry drum or the tub is not undershot for a long time, the speed of the laundry drum drive motor 5 via the described regulating and control unit 7 in connection with the control member 11 in small steps, e.g. B. 50 U / min, until the foam limit has returned to a certain low level and remains below. However, if a certain critical foam limit is not exceeded at a drum speed of around 100 rpm or when the centrifugal setpoint is activated, the spinning process is stopped immediately and a rinsing process is repeated or interposed. The analog pressure sensor 9 used in the washing machine described makes it possible to detect all washing levels, ie any level between 35 mm water column (foam level limit) and 300 mm water column (safety level limit) can be controlled.

Der Schleudervorgang wird auch abgebrochen und die Spülwassermenge des nachfolgenden Spülganges wird erhöht, wenn die Schaumgrenze bei einer vorab bestimmten bzw. festgelegten Waschtrommel-Drehzahl nicht mehr unterschritten wird. Ferner wird der Schleudervorgang abgebrochen sowie die Spülgang-Zeitdauer des nachfolgenden Spülgangs verlängert und/oder der Reversiervorgang (Bewegungsmechanik für das Umschichten des Waschgutes) während des nachfolgenden Spülgangs erhöht, wenn die Schaumgrenzen bei einer vorab bestimmten Waschtrommel-Drehzahl nicht mehr unterschritten wird.The spin cycle is also interrupted and the amount of rinsing water in the subsequent rinse cycle is increased if the foam limit is no longer undershot at a predetermined or specified washing drum speed. Furthermore, the spin cycle is interrupted and the duration of the rinse cycle of the subsequent rinse cycle is extended and / or the reversing process (movement mechanism for shifting the items to be washed) is increased during the subsequent rinse cycle if the foam limits are no longer undershot at a predetermined wash drum speed.

Ein weiterer Verfahrensschritt besteht darin, daß die Waschtrommel-Drehzahl bei vorhandenem Schaum bis zum Stillstand der Waschtrommel reduziert und danach einer vorab bestimmten bzw. festgelegten Zeitdauer wieder auf mindenstens 100 U/min beschleunigt wird. Diese Waschtrommel-Drehzahl-Reduzierung u. -Beschleunigung wird zweckmäßig mehrmals wiederholt, wobei jedoch die Anzahl dieser Wiederholungen je nach Wäscheart bzw. Waschprogrammwahl begrenzt ist. Die vorab bestimmten Wäschetrommel-Drehzahl-Reduzierungsschritte und/oder Wäschetrommel-Drehzahl-Beschleunigungsschritte können je nach Wäscheart, Programmwahl und/oder Anzahl der Schleudersollwertaufschaltungen zweckmäßig zusätzlich mit einem entsprechenden Faktor multipliziert werden. Die Steigerung der Wäschetrommel-Drehlzahl-Reduzierung und/oder -Beschleunigung kann dabei degressiv oder progressiv vorgenommen werden. Die programmspezifische Schleuderzeitdauer bei den aufgezeigten einzelnen Abläufen wird immer erst dann gestartet, wenn eine vorab bestimmte bzw. festgelegte Waschtrommel-Mindestdrehzahl- und/oder Mindestanlaufzeitdauer überschritten ist.A further process step is that the washing drum speed is reduced until the washing drum comes to a standstill when the foam is present and then accelerated again to at least 100 rpm for a predetermined or specified period of time. This washing drum speed reduction u. Acceleration is expediently repeated several times, although the number of these repetitions is limited depending on the type of laundry or washing program selection. The predetermined laundry drum speed reduction steps and / or laundry drum speed acceleration steps can, depending on the type of laundry, program selection and / or number of spin cycle value additions, be appropriately multiplied by a corresponding factor. The laundry drum speed reduction and / or acceleration can be increased degressively or progressively. The program-specific spin duration in the individual processes shown is only started when a predetermined or specified washing drum minimum speed and / or minimum startup period has been exceeded.

Claims (17)

1. Programmgesteuerte Waschmaschine mit einer durch einen Motor im Wasch- und Schleudergang antreibbaren Wäschetrommel, die sich im Inneren des Laugenbehälters befindet, aus welchem die Wasch- und Spüllauge mittels in einer Ablaufleitung angeordneten Entleerungspumpe abführbar ist und an der Ablaufleitung zwischen der Entleerungspumpe und dem Laugenbehälter eine Rohrleitung mit einer Meßeinrichtung angeschlossen ist, dadurch gekennzeichnet, daß als Meßeinrichtung ein Sensor dient, dessen Ausgangssignale ein Indiz für die Schaumbildung während des Schleudervorganges sind, und diese Ausgangssignale Regelgrößen für den Antriebsmotor der Wäschetrommel und damit für die Regelung der Schleuderdrehzahl darstellen.1.Program-controlled washing machine with a washing drum which can be driven by a motor in the washing and spin cycle and which is located inside the tub, from which the washing and rinsing liquor can be removed by means of a drain pump arranged in a drain line and on the drain line between the drain pump and the tub A pipe is connected to a measuring device, characterized in that a sensor serves as the measuring device, the output signals of which are an indication of the foam formation during the spin cycle, and these output signals represent control variables for the drive motor of the laundry drum and thus for the control of the spin speed. 2. Waschmaschine nach Anspruch 1, dadurch gekennzeichnet, daß als Meßeinrichtung (9) ein analoger oder pneumatischer Drucksensor vorgesehen ist.2. Washing machine according to claim 1, characterized in that an analog or pneumatic pressure sensor is provided as the measuring device (9). 3. Waschmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Meßeinrichtung zur Erfassung der Schaumgrenze eine druckunabhängige Einrichtung ist.3. Washing machine according to claim 1, characterized in that the measuring device for detecting the foam limit is a pressure-independent device. 4. Waschmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Schleuderdrehzahl nach dem Anlauf der Wäschetrommel in kleinsten Schritten nur dann erhöht wird, wenn die zulässige Schaumgrenze während einer bestimmten Zeitspanne unterschritten ist.4. Washing machine according to claim 1, characterized in that the spin speed after starting the laundry drum is increased in the smallest increments only if the permissible foam limit is undershot for a certain period of time. 5. Waschmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Schleuderdrehzahl nach dem Anlauf der Wäschetrommel in kleinsten Schritten reduziert wird, wenn eine bestimmte Schaumgrenze während einer längeren Zeitspanne nicht unterschritten wird.5. Washing machine according to claim 1, characterized in that the spin speed after starting the laundry drum is reduced in the smallest steps if a certain foam limit is not fallen below for a longer period of time. 6. Waschmaschine nach Anspruch 5, dadurch gekennzeichnet, daß die Schleuderdrehzahl solange reduziert wird, bis die Schaumgrenze wieder bleibend unterschritten wird.6. Washing machine according to claim 5, characterized in that the spin speed is reduced until the foam limit is permanently fallen below again. 7. Waschmaschine nach Anspruch 1, dadurch gekennzeichnet, daß der Schleudervorgang abgebrochen und ein Spülgang zwischengeschaltet wird, wenn die Schaumgrenze bei 100 U/min oder bei der Schleudersollwertaufschaltung nicht mehr unterschritten wird, od. während der Schleuderzeit eine vorab bestimmte Minimaldrehzahl nicht überschritten wird.7. Washing machine according to claim 1, characterized in that the spinning process is interrupted and a rinse cycle is interposed when the foam limit at 100 rpm or in the centrifugal setpoint is not exceeded, or during the spinning time a predetermined minimum speed is not exceeded. 8. Waschmaschine nach Anspruch 1, dadurch gekennzeichnet, daß der Drucksensor (9) parallel zum Flotten- bzw. Laugeniveau in der Wäschetrommel angeschlossen ist.8. Washing machine according to claim 1, characterized in that the pressure sensor (9) is connected in parallel to the liquor or lye level in the laundry drum. 9. Waschmaschine nach Anspruch 1, dadurch gekennzeichnet, daß der Schleudervorgang abgebrochen u. die Spülwassermenge des nachfolgenden Spülvorganges erhöht wird, wenn die Schaumgrenze bei einer vorab bestimmten Drehzahl nicht mehr unterschritten wird, od. eine vorab bestimmte Minimaldrehzahl während des Schleudervorganges nicht überschritten wird.9. Washing machine according to claim 1, characterized in that the spinning process is interrupted and. the amount of rinsing water in the subsequent rinsing process is increased if the foam limit is no longer undershot at a predetermined speed, or a predetermined minimum speed is not exceeded during the spinning process. 10. Waschmaschine nach Anspruch 1, dadurch gekennzeichnet, daß der Schleudervorgang abgebrochen u. die Spülgang-Zeitdauer des nachfolgenden Spülganges verlängert und/oder der Reversiervorgang während des nachfolgenden Spülganges erhöht wird, wenn die Schaumgrenze bei einer vorab bestimmten Waschtrommel-Drehzahl nicht mehr unterschritten wird, od. eine vorab bestimmte Minimaldrehzahl während des Schleudervorgangs nicht überschritten wird.10. Washing machine according to claim 1, characterized in that the spinning process is interrupted and. the duration of the rinse cycle of the subsequent rinse cycle is extended and / or the reversing process is increased during the subsequent rinse cycle if the foam limit is no longer undershot at a predetermined washing drum speed, or a predetermined minimum speed is not exceeded during the spinning process. 11. Waschmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Waschtrommel-Drehzahl bei vorhandener Schaumgrenze bis zum Stillstand reduziert und danach nach einer vorab bestimmten Zeitdauer wieder auf mindestens 100 U/min beschleunigt wird.11. Washing machine according to claim 1, characterized in that the washing drum speed is reduced to a standstill when the foam limit is present and is then accelerated again to at least 100 rpm after a predetermined period of time. 12. Waschmaschine nach Anspruch 11, dadurch gekennzeichnet, daß die Waschtrommel-Drehzahl-Reduzierung u. -Beschleunigung mehrmal wiederholt wird, wobei die Anzahl dieser Wiederholungen je nach Wäscheart bzw. Programmwahl begrenzt ist.12. Washing machine according to claim 11, characterized in that the washing drum speed reduction u. Acceleration is repeated several times, the number of these repetitions being limited depending on the type of laundry or program selection. 13. Waschmaschine nach Anspruch 1, 5, 10, oder 11, dadurch gekennzeichnet, daß die programmspezifische Schleuderzeitdauer erst dann gestartet wird, wenn eine vorab bestimmte Waschtrommel-Mindestdrehzahl-­und/oder Mindestanlaufzeitdauer überschritten ist.13. Washing machine according to claim 1, 5, 10 or 11, characterized in that the program-specific spinning time is only started when a predetermined washing drum minimum speed and / or minimum start-up time is exceeded. 14. Waschmaschine nach Anspruch 7 oder einem der folgenden, dadurch gekennzeichnet, daß die vorab bestimmten Wäschetrommel-Drehzahl-Reduzierungsschritte und/oder Wäschetrommel-Drehzahl-Beschleunigungsschritte je nach Wäscheart, Programmwahl und/oder Anzahl der Schleudersollwertaufschaltungen zusätzlich mit einem entsprechenden Faktor multipliziert werden.14. Washing machine according to claim 7 or one of the following, characterized in that the predetermined laundry drum speed reduction steps and / or laundry drum speed acceleration steps depending on the type of laundry, program selection and / or number of centrifugal setpoint additions are additionally multiplied by a corresponding factor. 15. Waschmaschine nach Anspruch 7 oder einem der folgenden, dadurch gekennzeichnet, daß die Wäschetrommel-Drehzahl-Reduzierung und/oder Wäschetrommel-Drehzahl-Beschleunigung degressiv od. progressiv gesteigert wird.15. Washing machine according to claim 7 or one of the following, characterized in that the washing drum speed reduction and / or washing drum speed acceleration is degressively or progressively increased. 16. Waschmaschine nach Anspruch 1 od. einem der folgenden, dadurch gekennzeichnet, daß der elektrischen Regel- u. Steuereinheit (7) für den Motor (5) ein Niveau-Komparator (10) vorgeschaltet sowie ein den Strom für den Motor (5) beeinflußendes Steuerglied (11) nachgeschaltet ist, und der Niveau-Komparator (10) an der Meßeinrichtung (9) angeschlossen ist.16. Washing machine according to claim 1 or one of the following, characterized in that the electrical control u. Control unit (7) for the motor (5) is preceded by a level comparator (10) and a control element (11) influencing the current for the motor (5) is connected downstream, and the level comparator (10) on the measuring device (9) connected. 17. Waschmaschine nach Anspruch 1 oder einem der folgenden, dadurch gekennzeichnet, daß der elektrische Regel- u. Steuereinheit (7) für den Motor (5) weitere Steuerglieder zugeordnet sind, durch die der Stromkreis des Antriebsmotors eines mechanisch gesteuerten Programmschaltwerkes und/oder der Stromkreis eines Kupplungsmagneten für die Programm-Überfahrstrecken zusätzlich unterbrochen od. geschlossen wird.17. Washing machine according to claim 1 or one of the following, characterized in that the electrical control u. Control unit (7) for the motor (5) are assigned further control elements, by means of which the circuit of the drive motor of a mechanically controlled program switching mechanism and / or the circuit of a clutch magnet for the program crossing sections is additionally interrupted or closed.
EP87116306A 1986-11-11 1987-11-05 Washing machine with a device for preventing the formation of foam Expired - Lifetime EP0268155B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3638498 1986-11-11
DE3638498A DE3638498C2 (en) 1986-11-11 1986-11-11 Program-controlled washing machine

Publications (3)

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EP0268155A2 true EP0268155A2 (en) 1988-05-25
EP0268155A3 EP0268155A3 (en) 1988-08-24
EP0268155B1 EP0268155B1 (en) 1991-07-24

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EP87116306A Expired - Lifetime EP0268155B1 (en) 1986-11-11 1987-11-05 Washing machine with a device for preventing the formation of foam

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EP (1) EP0268155B1 (en)
DE (2) DE3638498C2 (en)
TR (1) TR23176A (en)

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FR2639661A1 (en) * 1988-11-30 1990-06-01 Licentia Gmbh WASHING MACHINE CONTROLLED BY PROGRAM
EP0407272A1 (en) * 1989-07-04 1991-01-09 Esswein S.A. Washing machine with improved rinsing and a low water consumption
EP0429949A1 (en) * 1989-11-22 1991-06-05 INDUSTRIE ZANUSSI S.p.A. Automatic laundry washer of the rotating drum type
EP0724036A1 (en) * 1995-01-25 1996-07-31 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Clothes washing and drying machine with foam reducing arrangement
EP0984092A1 (en) * 1998-09-02 2000-03-08 Miele &amp; Cie. GmbH &amp; Co. Washing machine with device for determining the laundry weight
WO2004015189A1 (en) * 2002-07-29 2004-02-19 BSH Bosch und Siemens Hausgeräte GmbH Method for removing foam from the lye container of a drum-type washing machine
EP1688528A1 (en) * 2005-02-02 2006-08-09 Samsung Electronics Co., Ltd. Washing machine and foam sensing method thereof
WO2007074037A1 (en) * 2005-12-29 2007-07-05 Arcelik Anonim Sirketi A washing machine and a control method
WO2009010432A2 (en) 2007-07-18 2009-01-22 BSH Bosch und Siemens Hausgeräte GmbH Method for controlling the generation of suds in a washing machine and a washing machine suitable therefor
WO2009016009A1 (en) 2007-08-01 2009-02-05 BSH Bosch und Siemens Hausgeräte GmbH Method for eliminating foam in a drum washing machine and drum washing machine suitable therefor
JP2013009808A (en) * 2011-06-29 2013-01-17 Panasonic Corp Drum type washing machine and program for the same
EP2728048A1 (en) * 2011-06-29 2014-05-07 Panasonic Corporation Drum washing machine
EP2746444A1 (en) * 2012-12-21 2014-06-25 Electrolux Home Products Corporation N.V. Method for controlling a laundry washing machine and laundry washing machine
EP2849007A1 (en) * 2013-09-11 2015-03-18 Electrolux Appliances Aktiebolag A method for controlling a washing machine during a washing cycle
EP2848726A1 (en) * 2013-09-11 2015-03-18 Electrolux Appliances Aktiebolag A method for operating a washing machine
EP3382083A1 (en) * 2017-03-27 2018-10-03 Vestel Elektronik Sanayi ve Ticaret A.S. Method for determining foam in a washing machine

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DE4104151A1 (en) * 1991-02-12 1992-08-13 Miele & Cie Laundry treatment machine with program control - and foam sensing device with switching mechanism to switch on heating device when foam is detected
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DE19549526C2 (en) * 1995-06-23 1999-02-11 Miele & Cie Appts. for determining imbalance of washing machine drum
DE19606769B4 (en) * 1996-02-23 2006-05-11 AEG Hausgeräte GmbH Program-controlled washing machine with a device for reducing foaming
DE102007042968B4 (en) * 2007-09-10 2021-05-12 BSH Hausgeräte GmbH Method for detecting foam in a drum washing machine and a suitable drum washing machine
DE102015205949A1 (en) 2015-04-01 2016-10-06 BSH Hausgeräte GmbH Method for operating a washing machine with foam detection by a motor current evaluation and this suitable washing machine
DE102015205945A1 (en) 2015-04-01 2016-10-06 BSH Hausgeräte GmbH Method for operating a washing machine with foam detection by a drum speed evaluation and this suitable washing machine
EP3318670A1 (en) 2016-11-08 2018-05-09 BSH Hausgeräte GmbH Process for the operation of a washing machine with foam detection and washing machine suitable for this process

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FR2639661A1 (en) * 1988-11-30 1990-06-01 Licentia Gmbh WASHING MACHINE CONTROLLED BY PROGRAM
EP0407272A1 (en) * 1989-07-04 1991-01-09 Esswein S.A. Washing machine with improved rinsing and a low water consumption
FR2649422A1 (en) * 1989-07-04 1991-01-11 Esswein Sa WASHING MACHINE WITH IMPROVED AND ECONOMICAL RINSING
EP0429949A1 (en) * 1989-11-22 1991-06-05 INDUSTRIE ZANUSSI S.p.A. Automatic laundry washer of the rotating drum type
EP0724036A1 (en) * 1995-01-25 1996-07-31 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Clothes washing and drying machine with foam reducing arrangement
EP0984092A1 (en) * 1998-09-02 2000-03-08 Miele &amp; Cie. GmbH &amp; Co. Washing machine with device for determining the laundry weight
US7340792B2 (en) 2002-07-29 2008-03-11 Bsh Bosch Und Siemens Haugeraete Gmbh Process for eliminating foam in the lye container of a drum washing machine
WO2004015189A1 (en) * 2002-07-29 2004-02-19 BSH Bosch und Siemens Hausgeräte GmbH Method for removing foam from the lye container of a drum-type washing machine
EP1688528A1 (en) * 2005-02-02 2006-08-09 Samsung Electronics Co., Ltd. Washing machine and foam sensing method thereof
WO2007074037A1 (en) * 2005-12-29 2007-07-05 Arcelik Anonim Sirketi A washing machine and a control method
WO2009010432A2 (en) 2007-07-18 2009-01-22 BSH Bosch und Siemens Hausgeräte GmbH Method for controlling the generation of suds in a washing machine and a washing machine suitable therefor
WO2009010432A3 (en) * 2007-07-18 2009-06-18 Bsh Bosch Siemens Hausgeraete Method for controlling the generation of suds in a washing machine and a washing machine suitable therefor
EA017272B1 (en) * 2007-07-18 2012-11-30 Бсх Бош Унд Сименс Хаусгерете Гмбх Method for controlling the generation of suds in a washing machine and a washing machine suitable for carrying out said method
CN101755087B (en) * 2007-07-18 2012-12-19 Bsh博世和西门子家用器具有限公司 Method for controlling the generation of suds in a washing machine and a washing machine suitable therefor
US8601625B2 (en) 2007-07-18 2013-12-10 Bsh Bosch Und Siemens Hausgeraete Gmbh Method for controlling the generation of suds in a washing machine and a washing machine suitable therefor
WO2009016009A1 (en) 2007-08-01 2009-02-05 BSH Bosch und Siemens Hausgeräte GmbH Method for eliminating foam in a drum washing machine and drum washing machine suitable therefor
CN101772600B (en) * 2007-08-01 2012-05-30 Bsh博世和西门子家用器具有限公司 Method for removing bubbles in drum type washing machine and drum type washing machine suitable for the same
US8510887B2 (en) 2007-08-01 2013-08-20 Bsh Bosch Und Siemens Hausgeraete Gmbh Method for eliminating foam in a drum washing machine and drum washing machine suitable therefor
JP2013009808A (en) * 2011-06-29 2013-01-17 Panasonic Corp Drum type washing machine and program for the same
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EP2728048A1 (en) * 2011-06-29 2014-05-07 Panasonic Corporation Drum washing machine
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US9828716B2 (en) 2012-12-21 2017-11-28 Electrolux Home Products Corporation N.V. Method for controlling a laundry washing machine and laundry washing machine
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WO2015036166A1 (en) * 2013-09-11 2015-03-19 Electrolux Appliances Aktiebolag A method for operating a washing machine during a washing cycle
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US10000882B2 (en) 2013-09-11 2018-06-19 Electrolux Appliances Aktiebolag Method for operating a washing machine
US10077525B2 (en) 2013-09-11 2018-09-18 Electrolux Appliances Aktiebolag Method for operating a washing machine during a washing cycle
AU2014320700B2 (en) * 2013-09-11 2018-11-01 Electrolux Appliances Aktiebolag A method for operating a washing machine during a washing cycle
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EP3382083A1 (en) * 2017-03-27 2018-10-03 Vestel Elektronik Sanayi ve Ticaret A.S. Method for determining foam in a washing machine

Also Published As

Publication number Publication date
TR23176A (en) 1989-06-05
DE3638498C2 (en) 1994-06-30
DE3771665D1 (en) 1991-08-29
DE3638498A1 (en) 1988-05-19
EP0268155A3 (en) 1988-08-24
EP0268155B1 (en) 1991-07-24

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