EP1715095B1 - Process for controlling the water supply to the tub in a washer-dryer - Google Patents

Process for controlling the water supply to the tub in a washer-dryer Download PDF

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Publication number
EP1715095B1
EP1715095B1 EP06006351A EP06006351A EP1715095B1 EP 1715095 B1 EP1715095 B1 EP 1715095B1 EP 06006351 A EP06006351 A EP 06006351A EP 06006351 A EP06006351 A EP 06006351A EP 1715095 B1 EP1715095 B1 EP 1715095B1
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EP
European Patent Office
Prior art keywords
siphon
tub
water supply
washing liquid
water
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EP06006351A
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German (de)
French (fr)
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EP1715095A1 (en
Inventor
Michael Presto
Christoph Wendker
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Miele und Cie KG
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Miele und Cie KG
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Publication of EP1715095A1 publication Critical patent/EP1715095A1/en
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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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/50—Control of washer-dryers characterised by the purpose or target of the control
    • D06F33/52—Control of the operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/54—Control of the operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of water filling
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/18—Washing liquid level
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/02—Water supply
    • 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
    • D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air 
    • 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
    • D06F39/087—Water level measuring or regulating devices
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/32—Control of operations performed in domestic laundry dryers 

Definitions

  • the invention relates to a method for controlling the water supply to the tub of a washer dryer via at least one controllable by an electronic program control solenoid valve, which is associated with a Waschstoffein mecanickasten, which is connected to the tub via a water supply device with a trained as a water siphon, the siphon before or During a drying program by water supply is refillable to avoid the escape of moist process air, which is guided by a blower in a closed circuit through the tub and process air duct, from the Waschstoffein Textilkasten during the drying process.
  • Such a method is for a washer-dryer from the EP 1 197 592 A1 known.
  • the washer-dryer has a lye container which is connected via a siphon to the water supply device (detergent dispenser and controllable solenoid valves).
  • the siphon serves as a water trap, which should prevent the escape of moist exhaust air from the tub during the drying process.
  • the water supply can be completely or partially emptied due to the movement of the tub when spinning.
  • it is proposed here to replenish the water mask before and during drying it is provided to open the solenoid valves timed and one or more times refill a well-defined amount of water.
  • the water reservoir is filled at predetermined times with precisely defined amounts of water, regardless of the actual filling state of the siphon. It may therefore happen that time-controlled refilling occurs although there is still enough water in the siphon. If the water mask is overfilled, there is a risk that the laundry will be rewetted in the dry process.
  • the invention thus raises the problem of developing a method for filling the water mask in a washer-dryer, in which overfilling and thus rewetting of the laundry in the drying process is reliably avoided.
  • the achievable with the present invention consist in particular in that the water mask is filled depending on the actual filling state in the water mask or in the siphon and thus overfilling of the siphon and the rewetting of the laundry is avoided. In addition, water is eliminated by eliminating unnecessary refilling saved and the program runtime reduced.
  • the method for detecting the filling state of the siphon is possible with the present in the washer-dryer sensor for detecting the level in the tub.
  • FIGS. 1 and 2 the structure of the tub (1) or the thermodynamic unit of a washer-dryer with the assemblies essential to the invention is shown schematically.
  • FIG. 1 shows the essential components for the washing process and their assignment to the tub (1).
  • a drum (2) is rotatably mounted for receiving the laundry.
  • the water is supplied via the solenoid valves connected to the detergent dispenser (3).
  • the Waschschein Cypruskasten (3) is connected to the tub (1) via a water supply device with a trained as a water siphon (4).
  • the siphon (4) is filled with water when the water to the tub (1) and thus forms a vapor barrier for the during the washing process or in the dry process from the tub (1) exiting moist air.
  • a riser consisting of an air trap (5) and a hose (6) is arranged, in which according to the air trap principle, the water corresponding to the level increases in the tub (1).
  • an analog pressure sensor is arranged directly on the control board of the program control device (7).
  • the entire system air trap or riser and hose to the pressure sensor
  • the pressure-dependent voltage signal that is output by the analog pressure sensor is thus proportional to the liquid level in the tub (1).
  • FIG. 2 shows the essential components for the drying process and their assignment to the thermodynamic unit or to the tub (1) and the flow channel (8) for the process air.
  • the laundry is first washed and dried after the program section spin in the same device.
  • heated air is introduced into the door opening (9) in the front area of the tub (1).
  • the heating of this air takes place in a heating channel (10).
  • the warm air then flows through the drum (2) in the tub (1) and absorbs the moisture of the laundry.
  • an outlet opening (11) in the tub (1) the heated, laden with moisture air from the tub (1), condensed in a Kondenskanal (12) and by means of blower (13) in a closed circuit again on the heating channel (10) directed into the drum (2).
  • the in FIG. 1 illustrated siphon (4) is filled by the water inlet in the washing process.
  • the water mask can be reduced or completely emptied.
  • An overfilling of the water mask or the siphon (4) with partially or completely filled water mask is prevented by a pre-filling of the filling state in the siphon (4).
  • the voltage signal of the analog pressure sensor connected to the air trap is evaluated.
  • the blower (13) for the circulation of the process air is turned on to detect the filling state in the siphon (4) and carried out an evaluation of the voltage signal of the analog pressure sensor. Thereafter, the blower (13) is turned off and carried out a re-evaluation of the voltage signal. It is advantageous, after switching on and off the blower (13), the level measurements about 8 s. delayed. On the basis of the evaluation of the voltage signals, which correspond to the air pressure in the tub, the filling state is detected in the siphon (4).
  • the method for detecting the filling state of the water mask can also be carried out during the drying process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Drying Of Solid Materials (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)

Abstract

The wash tank (1) has a water level pressure chamber (5) connected by a hose (6) to a sensing unit (7) and machine control system which actuates the water filling valve at the wash product dispenser (3) and fill hose (4) and the drying fan to extract the hot moist air.

Description

Die Erfindung betrifft ein Verfahren zur Steuerung der Wasserzufuhr zum Laugenbehälter eines Waschtrockners über mindestens ein von einer elektronischen Programmsteuerung ansteuerbares Magnetventil, das einem Waschmitteleinspülkasten zugeordnet ist, der mit dem Laugenbehälter über eine Wasserzufuhreinrichtung mit einem als Wasservorlage ausgebildeten Siphon verbunden ist, wobei der Siphon vor oder während eines Trockenprogramms durch Wasserzufuhr auffüllbar ist um das Austreten von feuchter Prozessluft, die mittels Gebläse in geschlossenem Kreislauf durch Laugenbehälter und Prozessluftkanal geführt wird, aus dem Waschmitteleinspülkasten während des Trockenvorganges zu vermeiden.The invention relates to a method for controlling the water supply to the tub of a washer dryer via at least one controllable by an electronic program control solenoid valve, which is associated with a Waschmitteleinspülkasten, which is connected to the tub via a water supply device with a trained as a water siphon, the siphon before or During a drying program by water supply is refillable to avoid the escape of moist process air, which is guided by a blower in a closed circuit through the tub and process air duct, from the Waschmitteleinspülkasten during the drying process.

Ein derartiges Verfahren ist für einen Waschtrockner aus der EP 1 197 592 A1 bekannt. Der Waschtrockner verfügt über einen Laugenbehälter welcher über einen Siphon mit der Wasserzufuhreinrichtung (Waschmitteleinspülkasten sowie ansteuerbare Magnetventile) verbunden ist. Der Siphon dient als Wasservorlage, die das Austreten von feuchter Abluft aus dem Laugenbehälter während des Trockenvorganges vermeiden soll. Bei Waschtrocknern kann die Wasservorlage bedingt durch die Bewegung des Laugenbehälters beim Schleudern ganz oder teilweise entleert werden. Um das Austreten von feuchter Abluft sicher zu vermeiden, wird hier vorgeschlagen, die Wasservorlage vor und während des Trocknens erneut aufzufüllen. Dafür ist vorgesehen, die Magnetventile zeitgesteuert zu öffnen und dabei ein oder mehrmals eine genau definierte Menge Wasser nachzufüllen. Bei diesem Verfahren wird die Wasservorlage zu vorgegebenen Zeiten mit genau definierten Wassermengen unabhängig vom tatsächlichen Füllzustand des Siphons gefüllt. Es kann daher vorkommen, dass zeitgesteuert nachgefüllt wird, obwohl noch genügend Wasser im Siphon vorhanden ist. Bei Überfüllung der Wasservorlage besteht die Gefahr, dass die Wäsche im Trockenprozess rückbefeuchtet wird.Such a method is for a washer-dryer from the EP 1 197 592 A1 known. The washer-dryer has a lye container which is connected via a siphon to the water supply device (detergent dispenser and controllable solenoid valves). The siphon serves as a water trap, which should prevent the escape of moist exhaust air from the tub during the drying process. In the case of washer-dryers, the water supply can be completely or partially emptied due to the movement of the tub when spinning. In order to safely avoid the escape of moist exhaust air, it is proposed here to replenish the water mask before and during drying. For this purpose, it is provided to open the solenoid valves timed and one or more times refill a well-defined amount of water. In this process, the water reservoir is filled at predetermined times with precisely defined amounts of water, regardless of the actual filling state of the siphon. It may therefore happen that time-controlled refilling occurs although there is still enough water in the siphon. If the water mask is overfilled, there is a risk that the laundry will be rewetted in the dry process.

Ferner ist ein Verfahren gemäß dem Oberbegriff des Anspruchs 1 aus der EP 1 302 586 A1 bekannt.Furthermore, a method according to the preamble of claim 1 of the EP 1 302 586 A1 known.

Der Erfindung stellt sich somit das Problem, ein Verfahren zur Befüllung der Wasservorlage in einem Waschtrockner zu entwickeln, bei dem ein Überfüllen und damit ein Rückbefeuchten der Wäsche im Trockenprozess sicher vermieden wird.The invention thus raises the problem of developing a method for filling the water mask in a washer-dryer, in which overfilling and thus rewetting of the laundry in the drying process is reliably avoided.

Erfindungsgemäß wird dieses Problem durch ein Verfahren mit den Merkmalen des Patentanspruchs 1 gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus dem nachfolgenden Unteranspruch.According to the invention, this problem is solved by a method having the features of patent claim 1. Advantageous embodiments and modifications of the invention will become apparent from the following subclaim.

Die mit der Erfindung erreichbaren Vorteile bestehen insbesondere darin, dass die Wasservorlage in Abhängigkeit des tatsächlichen Füllzustandes in der Wasservorlage bzw. im Siphon befüllt wird und damit ein Überfüllen des Siphons sowie das Rückbefeuchten der Wäsche vermieden wird. Außerdem wird Wasser durch das Entfallen eines überflüssigen Nachfüllvorganges eingespart sowie die Programmablaufzeit verringert. Das Verfahren zur Erfassung des Füllzustandes des Siphons ist mit dem im Waschtrockner vorhandenen Sensor zur Erfassung des Niveaus im Laugenbehälter möglich.The achievable with the present invention consist in particular in that the water mask is filled depending on the actual filling state in the water mask or in the siphon and thus overfilling of the siphon and the rewetting of the laundry is avoided. In addition, water is eliminated by eliminating unnecessary refilling saved and the program runtime reduced. The method for detecting the filling state of the siphon is possible with the present in the washer-dryer sensor for detecting the level in the tub.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen rein schematisch dargestellt und wird nachfolgend näher beschrieben. Es zeigen:

Figur 1
die Anordnung der wasserführenden Baugruppen mit Wasservorlage (Siphon) eines Waschtrockners schematisch in der Frontansicht;
Figur 2
die thermodynamische Einheit eines Waschtrockners schematisch in der Seitenansicht und
Figur 3
den Verfahrensablauf bei Füllung der Wasservorlage bzw. des Siphons.
An embodiment of the invention is shown purely schematically in the drawings and will be described in more detail below. Show it:
FIG. 1
the arrangement of water-bearing assemblies with water siphon (siphon) of a washer dryer schematically in front view;
FIG. 2
the thermodynamic unit of a washer dryer schematically in side view and
FIG. 3
the procedure when filling the water mask or the siphon.

In den Figuren 1 und 2 ist der Aufbau des Laugenbehälters (1) bzw. der thermodynamischen Einheit eines Waschtrockners mit den erfindungswesentlichen Baugruppen schematisch dargestellt.In the FIGS. 1 and 2 the structure of the tub (1) or the thermodynamic unit of a washer-dryer with the assemblies essential to the invention is shown schematically.

Figur 1 zeigt die für den Waschprozess wesentlichen Baugruppen und deren Zuordnung zum Laugenbehälter (1). Innerhalb des Laugenbehälters (1) ist eine Trommel (2) drehbar zur Aufnahme der Wäsche gelagert. Im Waschprogramm erfolgt die Wasserzufuhr über die an den Waschmitteleinspülkasten (3) angeschlossenen Magnetventile. Der Waschmitteleinspülkasten (3) ist mit dem Laugenbehälter(1) über eine Wasserzufuhreinrichtung mit einem als Wasservorlage ausgebildeten Siphon (4) verbunden. Der Siphon (4) wird beim Wasserzulauf zum Laugenbehälter (1) mit Wasser gefüllt und bildet so eine Dampfsperre für die beim Waschprozess bzw. im Trockenprozess aus dem Laugenbehälter (1) austretende feuchte Luft. Im unteren Bereich des Laugenbehälters (1) ist eine Steigleitung bestehend aus einer Luftfalle (5) und einem Schlauch (6) angeordnet, in der nach dem Luftfallenprinzip das Wasser korrespondierend zum Niveau im Laugenbehälter (1) steigt. Am Ende der Steigleitung bzw. des Schlauchs (6) ist ein nicht näher dargestellter analoger Drucksensor direkt auf der Steuerplatine der Programmsteuereinrichtung (7) angeordnet. Das gesamte System (Luftfalle bzw. Steigleitung und Schlauch zum Drucksensor) ist luftdicht abgeschlossen. Auf diese Weise erhöht sich mit steigendem Wasserstand im Laugenbehälter (1) der Luftdruck in der Steigleitung bzw. der Luftfalle (5). Das druckabhängige Spannungssignal, das vom dem analogen Drucksensor abgegeben wird, ist somit proportional zum Flüssigkeitsniveau im Laugenbehälter (1). FIG. 1 shows the essential components for the washing process and their assignment to the tub (1). Within the tub (1) a drum (2) is rotatably mounted for receiving the laundry. In the wash program, the water is supplied via the solenoid valves connected to the detergent dispenser (3). The Waschmitteleinspülkasten (3) is connected to the tub (1) via a water supply device with a trained as a water siphon (4). The siphon (4) is filled with water when the water to the tub (1) and thus forms a vapor barrier for the during the washing process or in the dry process from the tub (1) exiting moist air. In the lower region of the tub (1), a riser consisting of an air trap (5) and a hose (6) is arranged, in which according to the air trap principle, the water corresponding to the level increases in the tub (1). At the end of the riser or the hose (6), an analog pressure sensor, not shown, is arranged directly on the control board of the program control device (7). The entire system (air trap or riser and hose to the pressure sensor) is hermetically sealed. In this way increases with increasing water level in the tub (1), the air pressure in the riser or the air trap (5). The pressure-dependent voltage signal that is output by the analog pressure sensor is thus proportional to the liquid level in the tub (1).

Figur 2 zeigt die für den Trockenprozess wesentlichen Baugruppen und deren Zuordnung zur thermodynamischen Einheit bzw. zum Laugenbehälter (1) sowie den Strömungskanal (8) für die Prozessluft. Die Wäsche wird zunächst gewaschen und nach dem Programmabschnitt Schleudern im selben Gerät getrocknet. Zum Trocknen wird in die Türöffnung (9) im vorderen Bereich des Laugenbehälters (1) erwärmte Luft eingeleitet. Die Erwärmung dieser Luft erfolgt in einem Heizkanal (10). Die warme Luft durchströmt anschließend die Trommel (2) im Laugenbehälter (1) und nimmt dabei die Feuchtigkeit der Wäsche auf. Durch eine Auslassöffnung (11) im Laugenbehälter (1) wird die erwärmte, mit Feuchtigkeit beladene Luft aus dem Laugenbehälter (1) abgeleitet, in einem Kondenskanal (12) kondensiert und mittels Gebläse (13) im geschlossenen Kreislauf wieder über den Heizkanal (10) in die Trommel (2) geleitet. FIG. 2 shows the essential components for the drying process and their assignment to the thermodynamic unit or to the tub (1) and the flow channel (8) for the process air. The laundry is first washed and dried after the program section spin in the same device. For drying, heated air is introduced into the door opening (9) in the front area of the tub (1). The heating of this air takes place in a heating channel (10). The warm air then flows through the drum (2) in the tub (1) and absorbs the moisture of the laundry. Through an outlet opening (11) in the tub (1), the heated, laden with moisture air from the tub (1), condensed in a Kondenskanal (12) and by means of blower (13) in a closed circuit again on the heating channel (10) directed into the drum (2).

Der in Figur 1 dargestellte Siphon (4) ist durch den Wasserzulauf im Waschprozess gefüllt. Beim Schleudern kommt es jedoch zu Auslenkungen des Laugenbehälters (1), durch die auch die flexibel an den Laugenbehälter (1) angeschlossene Wasserzufuhreinrichtung mit dem Siphon (4) mitbewegt wird. Dabei kann die Wasservorlage reduziert oder auch ganz entleert werden. Um das Austreten von feuchter Prozessluft aus dem Waschmitteleinspülkasten (3) während des Trockenvorganges zu vermeiden, wird der Siphon (4) vor oder während eines Trockenprogramms durch Wasserzufuhr nach dem in Figur 3 gezeigten Verfahrensablauf wieder befüllt. Ein Überfüllen der Wasservorlage bzw. des Siphons (4) bei noch teilweise oder ganz gefüllter Wasservorlage wird durch eine dem Füllvorgang vorgeschaltete Erfassung des Füllzustandes im Siphon (4) vermieden. Dazu wird das Spannungssignal des an die Luftfalle angeschlossenen analogen Drucksensors ausgewertet. Bei der Auswertung des Spannungssignals des analogen Drucksensors wird die Erkenntnis ausgenutzt, dass eine Niveauerfassung für den Füllstand im Laugenbehälter (1) nur bei gefüllter Wasservorlage bzw. bei gefülltem Siphon (4) möglich ist, wobei sich mit steigendem Wasserstand im Laugenbehälter (1) der Luftdruck in der Steigleitung erhöht. Vor dem Trockenvorgang wird zur Erfassung des Füllzustandes im Siphon (4) das Gebläse (13) für die Zirkulation der Prozessluft eingeschaltet und eine Auswertung des Spannungssignals des analogen Drucksensors durchgeführt. Danach wird das Gebläse (13) abgeschaltet und eine erneute Auswertung des Spannungssignals durchgeführt. Es ist vorteilhaft, nach dem Ein- bzw. Ausschalten des Gebläses (13) die Niveaumessungen ca. 8 s. verzögert durchzuführen. Anhand der Auswertung der Spannungssignale, die dem Luftdruck im Laugenbehälter entsprechen, erfolgt die Erkennung des Füllzustandes im Siphon (4).The in FIG. 1 illustrated siphon (4) is filled by the water inlet in the washing process. When spinning, however, it comes to deflections of the tub (1), by which also the flexible to the tub (1) connected to the water supply device with the siphon (4) is moved. The water mask can be reduced or completely emptied. In order to avoid the escape of moist process air from the Waschmitteleinspülkasten (3) during the drying process, the siphon (4) before or during a drying program by water supply after the in FIG. 3 filled again shown process flow. An overfilling of the water mask or the siphon (4) with partially or completely filled water mask is prevented by a pre-filling of the filling state in the siphon (4). For this purpose, the voltage signal of the analog pressure sensor connected to the air trap is evaluated. In the evaluation of the voltage signal of the analog pressure sensor, the knowledge is exploited that a level detection for the level in the tub (1) only when filled water mask or filled siphon (4) is possible, with increasing water level in the tub (1) of Increased air pressure in the riser. Before the drying process, the blower (13) for the circulation of the process air is turned on to detect the filling state in the siphon (4) and carried out an evaluation of the voltage signal of the analog pressure sensor. Thereafter, the blower (13) is turned off and carried out a re-evaluation of the voltage signal. It is advantageous, after switching on and off the blower (13), the level measurements about 8 s. delayed. On the basis of the evaluation of the voltage signals, which correspond to the air pressure in the tub, the filling state is detected in the siphon (4).

Der Siphon (4) ist gefüllt, wenn die Luftdruckdifferenz (Luftdruck Gebläse ein - Luftdruck Gebläse aus) einen vorgegebenen Grenzwert überschreitet. Ein Füllschritt wird nicht durchgeführt. Unterschreitet die Luftdruckdifferenz diesen vorgegebenen Grenzwert (z.B. X = 5 mm Ws), ist das System bestehend aus Laugenbehälter (1) und Druckerfassungseinrichtung bei entleertem Siphon (4) offen. Der erfasste Luftdruck entspricht dann bei beiden Messungen annähernd dem Normaldruck. Ein geringfügiger Druckunterschied aus beiden Messungen ergibt sich aus dem Einfluss der Beladung in der Trommel. In diesem Fall wird ein Füllschritt durch die Ansteuerung der Magnetventile eingeleitet.The siphon (4) is filled when the air pressure difference (air pressure blower on - air pressure blower off) exceeds a predetermined limit. A filling step is not carried out. If the air pressure difference falls below this predetermined limit value (eg X = 5 mm Ws), the system comprising the suds container (1) and the pressure detection device is open when the siphon (4) is empty. The detected air pressure then corresponds approximately to the normal pressure in both measurements. A slight pressure difference from both measurements results from the influence of the loading in the drum. In this case, a filling step is initiated by the control of the solenoid valves.

Das Verfahren zur Erfassung des Füllzustandes der Wasservorlage kann auch zusätzlich während des Trockenvorganges durchgeführt werden. Außerdem ist es möglich das Verfahren in Abhängigkeit einer festgelegten Grenzdrehzahl für den Schleudervorgang durchzuführen. Liegt die Drehzahl eines abschließenden Schleuderganges z.B. unterhalb eines festgelegten Wertes, ist davon auszugehen, dass die Wasservorlage nicht durch die Bewegungen des Laugenbehälters (1) entleert wurde. Eine Füllstandserfassung mit einem anschließenden Füllschritt muss nicht durchgeführt werden.The method for detecting the filling state of the water mask can also be carried out during the drying process. In addition, it is possible to carry out the method as a function of a specified limit speed for the spinning process. If the speed of a final spin is e.g. below a specified value, it is to be assumed that the water supply was not emptied by the movements of the tub (1). A level detection with a subsequent filling step does not have to be carried out.

Claims (2)

  1. Method for controlling the water supply to the washing liquid tub of a washer-drier by means of at least one solenoid valve that is actuatable by an electronic program control, the said solenoid valve being associated with a detergent wash-in container, which, with the washing liquid tub, is connected by means of a water supply device to a siphon that is in the form of water trap, wherein the siphon can be filled up by the water supply means before or during a drying program in order to prevent moist process air, which is guided by means of a blower in a closed circuit through the washing liquid tub and process air duct, escaping from the detergent wash-in container during the drying operation, characterised in that the fill level of the siphon (4) is detected by the level sensor, which is connected to the washing liquid tub (1), is disposed at the end of a rising line (5, 6) and generates voltage signals corresponding to the level-dependent pressure in the washing liquid tub (1), wherein a pressure measurement is carried out when the blower (13) is activated and a comparative measurement is carried out when the blower (13) is not activated and an evaluation of the signals received by the level sensor is effected in an evaluation circuit of the electronic program control device (7) and, in dependence on the difference value, the solenoid valve is actuated to accomplish a fill step.
  2. Method for controlling the water supply according to claim 1, characterised in that the detecting of the fill level in the siphon (4) is effected when the speed of the drum (2), mounted so as to be rotatable in the washing liquid tub (1), has exceeded a predetermined limit value in a previous spin cycle.
EP06006351A 2005-04-20 2006-03-28 Process for controlling the water supply to the tub in a washer-dryer Active EP1715095B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005018550A DE102005018550B3 (en) 2005-04-20 2005-04-20 A wash tank for a domestic washing and drying machine has a water level pressure system and control unit by which the drying fan is actuated when the water level is low

Publications (2)

Publication Number Publication Date
EP1715095A1 EP1715095A1 (en) 2006-10-25
EP1715095B1 true EP1715095B1 (en) 2008-04-30

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Family Applications (1)

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EP06006351A Active EP1715095B1 (en) 2005-04-20 2006-03-28 Process for controlling the water supply to the tub in a washer-dryer

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Country Link
EP (1) EP1715095B1 (en)
AT (1) ATE393848T1 (en)
DE (2) DE102005018550B3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3124668A1 (en) 2015-07-27 2017-02-01 Electrolux Appliances Aktiebolag Drying method for washer dryer with siphon filling and washer dryer

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007003085U1 (en) * 2007-03-02 2007-05-24 BSH Bosch und Siemens Hausgeräte GmbH Plastic moulded outer drum for a horizontal axis front loading washing machine has a horizontal outlet in the lower region directed to the side into which the pressure chamber is fitted
DE102009029523A1 (en) * 2009-09-17 2011-03-24 BSH Bosch und Siemens Hausgeräte GmbH Water-carrying household appliance with a water supply device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8507722D0 (en) * 1985-03-25 1985-05-01 Hotpoint Ltd Washing machines
JPH11104397A (en) * 1997-10-01 1999-04-20 Hitachi Ltd Drum type washing/spindrying machine
ITPN20000059A1 (en) * 2000-10-10 2002-04-10 Electrolux Zanussi Elettrodome COMBINED LINEN WASHING-DRYING MACHINE
DE20023575U1 (en) * 2000-12-08 2004-11-25 BSH Bosch und Siemens Hausgeräte GmbH Washing machine for rotating a washing drum in a lye/caustic solution container around a horizontal axis has a discharge hose linked to a discharge opening and a lye pump, also a turbidity sensor and a pressure sensor attachment
ITPN20010070A1 (en) * 2001-10-10 2003-04-10 Electrolux Zanussi Elettrodome LINEN WASHING MACHINE-DRYING MACHINE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3124668A1 (en) 2015-07-27 2017-02-01 Electrolux Appliances Aktiebolag Drying method for washer dryer with siphon filling and washer dryer
AU2016204988B2 (en) * 2015-07-27 2021-02-18 Electrolux Appliances Aktiebolag Drying Method for Washer Dryer with Siphon Filling

Also Published As

Publication number Publication date
EP1715095A1 (en) 2006-10-25
DE502006000701D1 (en) 2008-06-12
DE102005018550B3 (en) 2005-12-08
ATE393848T1 (en) 2008-05-15

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