EP1036231A2 - Automatically controlled washing machine with a lye rolling system - Google Patents

Automatically controlled washing machine with a lye rolling system

Info

Publication number
EP1036231A2
EP1036231A2 EP98963414A EP98963414A EP1036231A2 EP 1036231 A2 EP1036231 A2 EP 1036231A2 EP 98963414 A EP98963414 A EP 98963414A EP 98963414 A EP98963414 A EP 98963414A EP 1036231 A2 EP1036231 A2 EP 1036231A2
Authority
EP
European Patent Office
Prior art keywords
washing machine
pipeline
valve
float
turbidity sensor
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
EP98963414A
Other languages
German (de)
French (fr)
Other versions
EP1036231B1 (en
Inventor
Horst Wiemer
Harald MOSCHÜTZ
Edwin Bolduan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1036231A2 publication Critical patent/EP1036231A2/en
Application granted granted Critical
Publication of EP1036231B1 publication Critical patent/EP1036231B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/088—Liquid supply 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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/42—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of draining
    • 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/22—Condition of the washing liquid, e.g. turbidity
    • 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
    • D06F2103/20—Washing liquid condition, e.g. turbidity
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/58—Indications or alarms to the control system or to the user

Definitions

  • the invention relates to an automatically controlled washing machine with a lye circulation system, in which lye is discharged at the bottom of a laundry treatment room by means of a pump and fed back to it via a pipeline above the laundry in the treatment room, which washing machine is further connected to a fresh water supply line which is connected to a valve can be opened or closed, which can be controlled by a sensor device suitable for determining a volume flow present in the delivery direction of the pump.
  • Such a washing machine is known from DE-A-43 32 225.
  • a lye circulation system is connected to the bottom of the tub for constant flooding of the laundry in the washing drum by means of washing or rinsing lye.
  • This consists of a pipeline, in the course of which a drain pump and a sensor device are arranged. The presence of a flow in the pipeline is detected by the sensor device. Depending on the presence or absence of a flow in the pipeline, the sensor device emits a corresponding signal to the valve arranged in the course of the fresh water supply line, whereby either the fresh water supply is initiated or blocked. In this way, the washing machine is always supplied with the absolutely necessary amount of water.
  • the invention has for its object to develop a washing machine of the type described above so that the control of the fresh water supply can be done as possible with sensor elements already present on the washing machine.
  • the object is achieved according to the invention in that in the course of the pipeline a body which can be actuated by the volume flow prevailing in the pipeline is arranged and which, depending on the presence or non-existence presence of the volume flow protrudes into the measuring section of a turbidity sensor or releases it, by means of which turbidity sensor the valve is controlled in its open or closed position.
  • a body which can be actuated by the volume flow prevailing in the pipeline is arranged and which, depending on the presence or non-existence presence of the volume flow protrudes into the measuring section of a turbidity sensor or releases it, by means of which turbidity sensor the valve is controlled in its open or closed position.
  • the body is designed as a floating body and is arranged in a vertical region of the pipeline.
  • the float automatically assumes its rest position due to gravity. There is therefore no need for any special means for returning the float to its rest position.
  • the float is designed in the manner of a valve plate provided with a plunger, the plunger protruding into the measuring section of the turbidity sensor in the rest position of the float and the valve plate resting on a valve seat, the pipeline is completely shut off in the rest position of the float.
  • the occurrence of even a very small volume flow thus leads to an adjustment of the float. This results in a very high sensitivity of the device.
  • a separate valve seat in the pipeline can be avoided in that the circumferential edge of the valve disk has a conically increasing course and the pipeline is designed to be conical in the same way, at least in the rest position of the float.
  • a stop limiting the adjustment path of the float is also provided in the pipeline, the position of which is selected such that when the float lies against the stop of the plunger, the measuring section of the turbidity sensor is completely released.
  • Fig. 1 in a schematic representation of an automatically controlled washing machine
  • Fig. 2 shows the formation of a sensor device using a turbidity sensor.
  • a washing drum 2 is rotatably mounted in the tub 1 of the washing machine. In it are items of laundry 3 which are lifted by carriers 4 when the drum 2 is rotated and fall again. This means that the Items of laundry instead, which are always flooded with washing or rinsing water in new directions.
  • the washing or rinsing liquor is introduced into the tub 1 via a fresh water supply line 5 and a detergent container 6.
  • a valve 7 in the fresh water supply line 5 is used to control the fresh water supply. For this purpose, the valve 7 is controlled by a control device 8 of the washing machine.
  • a lye circulation system is connected to the bottom of the lye container 1 for the continuous flooding of the laundry with washing or rinsing liquor.
  • This consists of a pipeline 9, in the course of which a drain pump 10, a heating device 11 and a sensor device 12 are arranged.
  • the sensor device 12 has a floating body 13 arranged in the pipeline 9.
  • the float 13 is designed in the manner of a valve plate 15 provided with a tappet 14.
  • the peripheral edge 16 of the valve plate 15 is designed to rise conically.
  • the pipeline 9 is designed to rise conically in the same way, at least in the region corresponding to the rest position of the float 13.
  • the valve plate 15 can be in the rest position, i.e. in the absence of a volume flow, lay in the pipeline 9 with its peripheral edge 16 snugly against the inner wall of the pipeline 9.
  • a turbidity sensor 17 is attached to the outer circumference of the pipeline 9. At least in this area, the pipeline 9 is made of translucent material, so that a light beam 18 emitted by the transmission part of the turbidity sensor 17, which represents the measuring section of the turbidity sensor 17, can pass through the pipeline 9 to the receiving part of the turbidity sensor 17.
  • the diameter of the valve plate 15 is matched to the inside diameter of the pipe 9 so that the valve plate 15 comes into contact with the inner wall of the pipe 9 in relation to the position of the measuring section of the turbidity sensor 17 such that its plunger 14 is still in the light beam 18 of the Turbidity sensor 17 protrudes and interrupts it.
  • a corresponding control signal can be emitted from the turbidity sensor 17 to the control device 8, by means of which the valve 7 is opened by the control device 8. Fresh water is thus supplied until the pump 10
  • the volume flow set in the pipeline 9 lifts the valve plate 15 and thereby pulls the plunger 14 out of the measuring section, ie out of the light beam 18. Now the light beam 18 hits the receiving part of the turbidity sensor 17 and triggers a control signal from which the valve 7 is blocked again.
  • the washing machine is only supplied with the amount of water that is absolutely necessary for a washing process.
  • the turbidity sensor 17 which is present in any case in modern washing machines is used not only for measuring turbidity during the washing process of the washing machine but also for controlling the fresh water supply. A separate sensor element for controlling the fresh water supply can thus be saved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

Detergent solution is discharged by means of a pump (10) at the bottom of a washing handling space (1) and is fed back to the handling space (1) via a pipeline (9) above the washing (3) located in the handling space. The washing machine is also connected to a fresh-water supply line (5) which can be opened and closed by a valve (7) which is controllable by a sensor device (12) suitable for establishing a volumetric flow present in the pumping direction of the pump (10).It is possible to dispense with a separate sensor element for controlling the fresh-water supply by a body (13) which can be actuated by the volumetric flow prevailing in the pipeline (9) being arranged along the pipeline (9) and, depending on the presence or absence of volumetric flow, protruding into or releasing the measuring section (18) of a turbidity sensor (17). Finally, the valve (7) is controlled by the turbidity sensor (17) so as to assume its opening or closed position.

Description

Automatisch gesteuerte Waschmaschine mit einem LaugenumwälzsystemAutomatically controlled washing machine with a lye circulation system
Die Erfindung betrifft eine automatisch gesteuerte Waschmaschine mit einem Laugen- umwälzsystem, bei dem am Boden eines Wäschebehandlungsraumes mittels einer Pumpe Lauge abgeführt und über eine Rohrleitung oberhalb der im Behandlungsraum befindlichen Wäsche diesem wieder zugeführt wird, welche Waschmaschine ferner an eine Frischwasserzuleitung angeschlossen ist, die durch ein Ventil geöffnet oder geschlossen werden kann, das durch eine zur Feststellung eines in der Förderrichtung der Pumpe vorhandenen Volumenstromes geeignete Sensoreinrichtung steuerbar ist.The invention relates to an automatically controlled washing machine with a lye circulation system, in which lye is discharged at the bottom of a laundry treatment room by means of a pump and fed back to it via a pipeline above the laundry in the treatment room, which washing machine is further connected to a fresh water supply line which is connected to a valve can be opened or closed, which can be controlled by a sensor device suitable for determining a volume flow present in the delivery direction of the pump.
Eine solche Waschmaschine ist durch die DE-A-43 32 225 bekannt. Bei dieser Waschmaschine ist zum ständigen Durchfluten der in der Waschtrommel befindlichen Wäsche mittels Wasch- oder Spüllauge am Boden des Laugenbehälters ein Laugenumwälzsystem angeschlossen. Dieses besteht aus einer Rohrleitung, in deren Zuge eine Laugen- pumpe und eine Sensoreinrichtung angeordnet sind. Durch die Sensoreinrichtung wird das Vorhandensein einer Strömung in der Rohrleitung erfaßt. Die Sensoreinrichtung gibt in Abhängigkeit vom Vorhandensein oder NichtVorhandensein einer Strömung in der Rohrleitung ein entsprechendes Signal an das im Zuge der Frischwasserzuleitung angeordnete Ventil ab, wodurch entweder die Frischwasserzufuhr eingeleitet oder gesperrt wird. Auf diese Weise wird die Waschmaschine stets nur mit der unbedingt notwendigen Wassermenge versorgt.Such a washing machine is known from DE-A-43 32 225. In this washing machine, a lye circulation system is connected to the bottom of the tub for constant flooding of the laundry in the washing drum by means of washing or rinsing lye. This consists of a pipeline, in the course of which a drain pump and a sensor device are arranged. The presence of a flow in the pipeline is detected by the sensor device. Depending on the presence or absence of a flow in the pipeline, the sensor device emits a corresponding signal to the valve arranged in the course of the fresh water supply line, whereby either the fresh water supply is initiated or blocked. In this way, the washing machine is always supplied with the absolutely necessary amount of water.
Der Erfindung liegt die Aufgabe zugrunde, eine Waschmaschine der eingangs beschriebenen Art so weiterzubilden, daß die Steuerung der Frischwasserzufuhr möglichst mit bereits ohnehin schon an der Waschmaschine vorhandenen Sensorelementen erfolgen kann.The invention has for its object to develop a washing machine of the type described above so that the control of the fresh water supply can be done as possible with sensor elements already present on the washing machine.
Die Lösung der gestellten Aufgabe gelingt nach der Erfindung dadurch, daß im Zuge der Rohrleitung ein durch den in der Rohrleitung herrschenden Volumenstrom betätigbarer Körper angeordnet ist, der in Abhängigkeit von dem Vorhandensein oder dem Nichtvor- handensein des Volumenstromes in die Meßstrecke eines Trübungssensors ragt bzw. diese freigibt, durch welchen Trübungssensor das Ventil in seine öffnungs- oder Schließstellung gesteuert ist. Somit braucht in der Rohrleitung nur ein einfaches mechanisches Teil eingebaut zu werden, wohingegen für die aufwendigere sensorische Erfas- sung der für die Trübungsmessung des Spülwassers sowieso vorhandene Trübungssensor herangezogen wird.The object is achieved according to the invention in that in the course of the pipeline a body which can be actuated by the volume flow prevailing in the pipeline is arranged and which, depending on the presence or non-existence presence of the volume flow protrudes into the measuring section of a turbidity sensor or releases it, by means of which turbidity sensor the valve is controlled in its open or closed position. Thus, only a simple mechanical part needs to be installed in the pipeline, whereas the turbidity sensor, which is in any case available for measuring the turbidity of the rinsing water, is used for the more complex sensory detection.
Gemäß einer weiteren Ausgestaltung der Erfindung ist der Körper als Schwebekörper ausgebildet und in einem senkrecht verlaufenden Bereich der Rohrleitung angeordnet. Bei einer solchen Anordnung nimmt der Schwebkörper aufgrund der Schwerkraft seine Ruhelage selbsttätig ein. Es bedarf somit keiner gesonderten Mittel für eine Rückführung des Schwebekörpers in seine Ruhestellung.According to a further embodiment of the invention, the body is designed as a floating body and is arranged in a vertical region of the pipeline. With such an arrangement, the float automatically assumes its rest position due to gravity. There is therefore no need for any special means for returning the float to its rest position.
Dadurch, daß der Schwebekörper nach Art eines mit einem Stößel versehenen Ventiltellers ausgebildet ist, wobei der Stößel in der Ruhelage des Schwebekörpers in die Meßstrecke des Trübungssensors ragt und der Ventilteller an einem Ventilsitz anliegt, wird in der Ruhelage des Schwebekörpers die Rohrleitung vollständig abgesperrt. Damit führt das Auftreten auch eines sehr kleinen Volumenstromes bereits zu einem Verstellen des Schwebekörpers. Es ergibt sich hierdurch eine sehr hohe Empfindlichkeit der Einrichtung.Characterized in that the float is designed in the manner of a valve plate provided with a plunger, the plunger protruding into the measuring section of the turbidity sensor in the rest position of the float and the valve plate resting on a valve seat, the pipeline is completely shut off in the rest position of the float. The occurrence of even a very small volume flow thus leads to an adjustment of the float. This results in a very high sensitivity of the device.
Ein gesonderter Ventilsitz in der Rohrleitung läßt sich dadurch vermeiden, daß der Um- fangsrand des Ventiltellers einen konisch ansteigenden Verlauf aufweist und die Rohrleitung zumindest im Bereich der Ruhelage des Schwebekörpers in gleicher Weise konisch verlaufend ausgebildet ist.A separate valve seat in the pipeline can be avoided in that the circumferential edge of the valve disk has a conically increasing course and the pipeline is designed to be conical in the same way, at least in the rest position of the float.
Zweckmäßigerweise ist in der Rohrleitung ferner ein den Verstellweg des Schwebekörpers begrenzender Anschlag vorgesehen, dessen Lage so gewählt ist, daß beim Anlie- gen des Schwebekörpers an dem Anschlag der Stößel die Meßstrecke des Trübungssensors vollständig freigibt.Advantageously, a stop limiting the adjustment path of the float is also provided in the pipeline, the position of which is selected such that when the float lies against the stop of the plunger, the measuring section of the turbidity sensor is completely released.
Anhand eines in der Zeichnung dargestellten Ausführungsbeispieles ist die Erfindung nachstehend erläutert. Es zeigenThe invention is explained below using an exemplary embodiment shown in the drawing. Show it
Fig. 1 in schematischer Darstellung eine automatisch gesteuerte Waschmaschine, Fig. 2 die Ausbildung einer Sensoreinrichtung unter Verwendung eines Trübungssensors.Fig. 1 in a schematic representation of an automatically controlled washing machine, Fig. 2 shows the formation of a sensor device using a turbidity sensor.
Im Laugenbehälter 1 der Waschmaschine ist eine Waschtrommel 2 drehbar gelagert. Darin liegen Wäschestücke 3, die durch Mitnehmer 4 beim Drehen der Trommel 2 angehoben werden und wieder herabfallen. Dadurch findet ein ständiges Umschichten der Wäschestücke statt, wodurch diese stets in neuen Richtungen von Wasch- oder Spüllauge durchflutet werden. Die Wasch- oder Spüllauge wird über eine Frischwasserzuleitung 5 und einen Waschmittelbehälter 6 in den Laugenbehälter 1 eingeführt. Zum Steuern der Frischwasserzufuhr dient ein Ventil 7 in der Frischwasserzuleitung 5. Das Ventil 7 wird zu diesem Zweck von einer Steuereinrichtung 8 der Waschmaschine gesteuert.A washing drum 2 is rotatably mounted in the tub 1 of the washing machine. In it are items of laundry 3 which are lifted by carriers 4 when the drum 2 is rotated and fall again. This means that the Items of laundry instead, which are always flooded with washing or rinsing water in new directions. The washing or rinsing liquor is introduced into the tub 1 via a fresh water supply line 5 and a detergent container 6. A valve 7 in the fresh water supply line 5 is used to control the fresh water supply. For this purpose, the valve 7 is controlled by a control device 8 of the washing machine.
Zum ständigen Durchfluten der Wäsche mit Wasch- oder Spüllauge ist am Boden des Laugenbehälters 1 ein Laugenumwälzsystem angeschlossen. Dieses besteht aus einer Rohrleitung 9, in deren Zug eine Laugenpumpe 10, eine Heizeinrichtung 11 und eine Sensoreinrichtung 12 angeordnet sind.A lye circulation system is connected to the bottom of the lye container 1 for the continuous flooding of the laundry with washing or rinsing liquor. This consists of a pipeline 9, in the course of which a drain pump 10, a heating device 11 and a sensor device 12 are arranged.
Gemäß der in Fig. 2 gezeigten Ausführungsvarianten weist die Sensoreinrichtung 12 einen in der Rohrleitung 9 angeordneten Schwebekörper 13 auf. Der Schwebekörper 13 ist nach Art eines mit einem Stößel 14 versehenen Ventiltellers 15 ausgeführt. Der Um- fangsrand 16 des Ventiltellers 15 ist konisch ansteigend ausgebildet. Die Rohrleitung 9 ist zumindest in dem der Ruhelage des Schwebekörpers 13 entsprechenden Bereich in der gleichen Weise konisch ansteigend ausgebildet. Damit kann sich der Ventilteller 15 in der Ruhelage, d.h. bei Nichtvorhandensein eines Volumenstromes, in der Rohrleitung 9 mit seinem Umfangsrand 16 satt an der Innenwand der Rohrleitung 9 anlegen.According to the embodiment variants shown in FIG. 2, the sensor device 12 has a floating body 13 arranged in the pipeline 9. The float 13 is designed in the manner of a valve plate 15 provided with a tappet 14. The peripheral edge 16 of the valve plate 15 is designed to rise conically. The pipeline 9 is designed to rise conically in the same way, at least in the region corresponding to the rest position of the float 13. Thus, the valve plate 15 can be in the rest position, i.e. in the absence of a volume flow, lay in the pipeline 9 with its peripheral edge 16 snugly against the inner wall of the pipeline 9.
Am Außenumfang der Rohrleitung 9 ist ein Trübungssensor 17 angebracht. Zumindest in diesem Bereich besteht die Rohrleitung 9 aus lichtdurchlässigem Material, so daß ein vom Sendeteil des Trübungssensors 17 ausgesandter Lichtstrahl 18, welcher die Meßstrecke des Trübungssensors 17 darstellt, durch die Rohrleitung 9 hindurch zum Empfangsteil des Trübungssensors 17 gelangen kann.A turbidity sensor 17 is attached to the outer circumference of the pipeline 9. At least in this area, the pipeline 9 is made of translucent material, so that a light beam 18 emitted by the transmission part of the turbidity sensor 17, which represents the measuring section of the turbidity sensor 17, can pass through the pipeline 9 to the receiving part of the turbidity sensor 17.
Der Durchmesser des Ventiltellers 15 ist so auf den Innendurchmesser der Rohrleitung 9 abgestimmt, daß der Ventilteller 15 in Bezug auf die Lage der Meßstrecke des Trübungssensors 17 so an der Innenwand der Rohrleitung 9 zur Anlage kommt, daß sein Stößel 14 noch in den Lichtstrahl 18 des Trübungssensors 17 ragt und diesen unterbricht. Dadurch kann vom Trübungssensor 17 ein entsprechendes Steuersignal an die Steuereinrichtung 8 abgegeben werden, durch das das Ventil 7 von der Steuereinrich- tung 8 aufgesteuert wird. Damit wird solange Frischwasser zugführt, bis die Pumpe 10The diameter of the valve plate 15 is matched to the inside diameter of the pipe 9 so that the valve plate 15 comes into contact with the inner wall of the pipe 9 in relation to the position of the measuring section of the turbidity sensor 17 such that its plunger 14 is still in the light beam 18 of the Turbidity sensor 17 protrudes and interrupts it. As a result, a corresponding control signal can be emitted from the turbidity sensor 17 to the control device 8, by means of which the valve 7 is opened by the control device 8. Fresh water is thus supplied until the pump 10
Wasser in die Rohrleitung 9 pumpen kann.Can pump water into the pipe 9.
Der in der Rohrleitung 9 einsetzenden Volumenstrom hebt den Ventilteller 15 und zieht dadurch der Stößel 14 aus der Meßstrecke, d.h. aus dem Lichtstrahl 18. Nun trifft der Lichtstrahl 18 auf den Empfangsteil des Trübungssensors 17 und löst ein Steuersignal aus, durch das das Ventil 7 wieder gesperrt wird. Somit wird der Waschmaschine nur die für einen Waschvorgang unbedingt notwendige Wassermenge zugeführt.The volume flow set in the pipeline 9 lifts the valve plate 15 and thereby pulls the plunger 14 out of the measuring section, ie out of the light beam 18. Now the light beam 18 hits the receiving part of the turbidity sensor 17 and triggers a control signal from which the valve 7 is blocked again. Thus, the washing machine is only supplied with the amount of water that is absolutely necessary for a washing process.
Der bei modernen Waschmaschinen ohnehin vorhandene Trübungssensor 17 wird also außer zur Trübungsmessung während des Spülvorganges der Waschmaschine auch zur Steuerung der Frischwasserzufuhr herangezogen. Somit kann ein gesondertes Sensorelement für die Steuerung der Frischwasserzufuhr eingespart werden. The turbidity sensor 17 which is present in any case in modern washing machines is used not only for measuring turbidity during the washing process of the washing machine but also for controlling the fresh water supply. A separate sensor element for controlling the fresh water supply can thus be saved.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Automatisch gesteuerte Waschmaschine mit einem Laugenumwälzsystem, bei dem am Boden eines Wäschebehandlungsraumes mittels einer Pumpe Lauge abgeführt und über eine Rohrleitung oberhalb der im Behandlungsraum befindlichen Wäsche diesem wieder zugeführt wird, welche Waschmaschine ferner an eine Frischwasserzuleitung angeschlossen ist, die durch ein Ventil, das durch eine zur Feststellung eines in der Förderrichtung der Pumpe vorhandenen Volu- 5 menstromes geeignete Sensoreinrichtung steuerbar ist, geöffnet oder geschlossen werden kann, dadurch gekennzeichnet, daß im Zuge der Rohrleitung (9) ein durch den in der Rohrleitung (9) herrschenden Volumenstrom betätigbarer Körper (13) angeordnet ist, der in Abhängigkeit von dem Vorhandensein oder dem Nichtvorhandensein des Volumenstromes in die Meßstrecke (18) eines Trübungs- o sensors (17) ragt bzw. diese freigibt, durch welchen Trübungssensor (17) das1.Automatically controlled washing machine with a lye circulation system, in which lye is discharged at the bottom of a laundry treatment room by means of a pump and fed back to it via a pipe above the laundry in the treatment room, which washing machine is also connected to a fresh water supply line which is connected by a valve which can be controlled, opened or closed by a sensor device suitable for determining a volume flow present in the delivery direction of the pump, characterized in that in the course of the pipeline (9) a body which can be actuated by the volume flow prevailing in the pipeline (9) (13) is arranged, which, depending on the presence or absence of the volume flow, projects into the measuring section (18) of a turbidity sensor (17) or releases it, through which turbidity sensor (17) the
Ventil (7) in seine Öffnungs- oder Schließstellung gesteuert ist.Valve (7) is controlled in its open or closed position.
2. Waschmaschine nach Anspruch 1 , dadurch gekennzeichnet, daß der Körper als Schwebekörper (13) ausgebildet und in einem senkrecht verlaufenden Bereich 5 der Rohrleitung (9) angeordnet ist.2. Washing machine according to claim 1, characterized in that the body is designed as a float (13) and is arranged in a perpendicular region 5 of the pipeline (9).
3. Waschmaschine nach Anspruch 2, dadurch gekennzeichnet, daß der Schwebekörper (13) nach Art eines mit einem Stößel (14) versehenen Ventiltellers (15) ausgebildet ist, wobei der Stößel (14) in der Ruhelage des Schwebekörpers (13) 0 in die Meßstrecke (18) des Trübungssensors (17) ragt und der Ventilteller (15) an einem Ventilsitz anliegt.3. Washing machine according to claim 2, characterized in that the float (13) is designed in the manner of a plunger (14) provided with valve plate (15), the plunger (14) 0 in the rest position of the float (13) Measuring section (18) of the turbidity sensor (17) protrudes and the valve plate (15) rests against a valve seat.
4. Waschmaschine nach Anspruch 3, dadurch gekennzeichnet, daß der Umfangs- rand (16) des Ventiltellers (15) einen konisch ansteigenden Verlauf aufweist und 5 die Rohrleitung (9) im Bereich der Ruhelage des Schwebekörpers (13) in gleicher4. Washing machine according to claim 3, characterized in that the peripheral edge (16) of the valve plate (15) has a conically increasing course and 5 the pipe (9) in the rest position of the float (13) in the same
Weise konisch verlaufend ausgebildet ist. Waschmaschine nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß in der Rohrleitung (9) ein den Schwebeweg des Schwebekörpers (13) begrenzender Anschlag vorgesehen ist, dessen Lage so gewählt ist, daß beim Anliegen des Schwebekörpers (13) an dem Anschlag der Stößel (14) die Meßstrecke (18) des Trübungssensors (17) vollständig freigibt. Way is conical. Washing machine according to claim 3 or 4, characterized in that a stop is provided in the pipeline (9) which limits the floating path of the floating body (13), the position of which is selected such that when the floating body (13) bears against the stop of the plunger ( 14) completely releases the measuring section (18) of the turbidity sensor (17).
EP98963414A 1997-11-04 1998-11-04 Automatically controlled washing machine with a lye rolling system Expired - Lifetime EP1036231B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19748706 1997-11-04
DE19748706A DE19748706A1 (en) 1997-11-04 1997-11-04 Automatically controlled washing machine with a lye circulation system
PCT/EP1998/007064 WO1999023292A2 (en) 1997-11-04 1998-11-04 Automatically controlled washing machine with a lye rolling system

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EP1036231A2 true EP1036231A2 (en) 2000-09-20
EP1036231B1 EP1036231B1 (en) 2002-03-13

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EP98963414A Expired - Lifetime EP1036231B1 (en) 1997-11-04 1998-11-04 Automatically controlled washing machine with a lye rolling system

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US (1) US6378341B1 (en)
EP (1) EP1036231B1 (en)
AT (1) ATE214440T1 (en)
DE (2) DE19748706A1 (en)
ES (1) ES2174525T3 (en)
TR (1) TR200001158T2 (en)
WO (1) WO1999023292A2 (en)

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US6378341B1 (en) 2002-04-30
DE19748706A1 (en) 1999-05-06
ATE214440T1 (en) 2002-03-15
WO1999023292A3 (en) 1999-08-19
ES2174525T3 (en) 2002-11-01
EP1036231B1 (en) 2002-03-13
TR200001158T2 (en) 2000-11-21
WO1999023292A2 (en) 1999-05-14
DE59803380D1 (en) 2002-04-18

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