EP0849390B1 - Washing machine with a liquid pipe comprising several parts - Google Patents

Washing machine with a liquid pipe comprising several parts Download PDF

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Publication number
EP0849390B1
EP0849390B1 EP97119925A EP97119925A EP0849390B1 EP 0849390 B1 EP0849390 B1 EP 0849390B1 EP 97119925 A EP97119925 A EP 97119925A EP 97119925 A EP97119925 A EP 97119925A EP 0849390 B1 EP0849390 B1 EP 0849390B1
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EP
European Patent Office
Prior art keywords
washing machine
machine according
pipe section
drum washing
duct
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97119925A
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German (de)
French (fr)
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EP0849390A3 (en
EP0849390A2 (en
Inventor
Christian Dipl.-Ing. Engel
Gundula Dipl.-Ing. Czyzewski
Wolfgang Proppe
Carsten Dr.-Ing. Stelzer
Andreas Dipl.-Ing. /Dr.-Ing. Stolze
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
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Individual
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Publication of EP0849390A3 publication Critical patent/EP0849390A3/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
    • 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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
    • D06F37/22—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a horizontal axis
    • 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
    • D06F39/083—Liquid discharge or recirculation 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
    • 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

Definitions

  • the invention relates to a drum washing machine with a between one in the bottom Suds container arranged drain hole and one located further up in the suds container Opening guided multi-part liquid line, which contains a line section, the only serves to circulate the lye in the tub between Hold opening and drain hole, and the one solid pipe section with a see-through Has an area on the wall of which responds to the cloudiness of the alkali, one optical transmitter and an optical receiver-containing sensor is installed.
  • Such a drum washing machine is known from DE 36 03 323 A1.
  • the Sensor installed so far down in the suds drain system that there remains in the suds drain system Water to calcify the transparent area and to reduce transparency can lead to falsify the measured values recorded by the sensor.
  • the known turbidity sensor is subject to severe vibrations when spinning, because the known line section on the one hand on the vibrating tub and on the other is attached to the fixed drain pump. Transfer the tub vibrations therefore rely on the sensor.
  • the attachment points of the line section subject to very heavy loads.
  • the invention has for its object in a drum washing machine described above to design the arrangement of an optical sensor for the cloudiness of the lye, that neither the sensor nor the fastenings of the line section due to vibrations too heavy when spinning and that the transparent area of the pipe section is not clouded by limescale.
  • this object is achieved in that the line section on the one hand an upper part of a drain pipe connected to the drain hole and on the other hand on the is connected higher to the tub and the sensor in a fork-like, the pipe section encompassing housing is installed, which on the contact surfaces is adapted to the transparent area of the outer shape of the pipe section.
  • the sensor reaches an area below the tub, in which it is not is more exposed to the remaining lye residue, although it is used for the purpose of Turbidity measurement of the alkali during washing and / or rinsing fully with the respective Alkali is applied.
  • vibrations during the skidding are for the Sensor and the fastenings of the line section harmless because of the line section is connected at both ends to connections that swing in the same direction as the tub.
  • the pipe section has a on its outer wall base-like thickening with a mounting surface facing away from the interior of the tube and is used to attach the sensor.
  • the transmitter and receiver have a fixed and unchangeable one Position to each other.
  • the fork extensions are interconnected by a bridge connected to each other for positioning the LED and the phototransistor serves to mount the housing on the base-like thickening.
  • the line section of the Washing machine according to the invention is designed in a special way that the Pipe section with the upper part of the drain line connected to the drain hole is liquid-tight is connected and via a flexible elbow to the opening in the tub Has connection.
  • the line bend is therefore preferably designed to be flexible so that the Line section can be easily assembled in the manufacture of the washing machine.
  • To the line bend can be formed from a rubber-like material and have a fold or instead of the fold, the arch can be formed by several folds.
  • the pipe section forms an elbow and is connected to the opening of the tub. This will get the Sensor in the highest possible position, which is still in use when the washing machine is in operation Alkali is applied.
  • the pipe section can either be an integral part of the line section or on its remote from the opening End by means of a pipe with the upper part of the drain pipe connected to the drain hole be connected liquid-tight.
  • the entire line section consist of a solid pipe component or this pipe component outside the pipe section have a multi-part corrugation.
  • the pipe can either be smooth Provide wall or be designed as a corrugated tube. In all cases, it is for the unhindered Flow of the alkali to be measured is particularly advantageous if the pipe section is continuously curved.
  • the washing machine shown in Figure 1 has a housing 1 in which a tub 2 on way not shown here is mounted to vibrate.
  • the washing drum is in the tub 2 3 horizontally rotatable.
  • In the upper part of the tub 2 it can over a line 4 from a supply line 5 via a solenoid valve 6 and a detergent box 7 Water and optionally detergent are added.
  • In the lower section of the tub 2 is connected to a drain hole 8 a drain line 9 in a liquid-tight manner Folds 10 and a further line 11 on a not shown here, firmly mounted in the housing 1 Drain pump is connected.
  • a line section 13 is switched on somewhat higher than the drain hole 8, by constantly leaching out of the opening 12 during operation of the washing machine flows back to the drain line 9 and via the drain hole 8 back into the tub 2. This flow is based on small pressure differences between the lye and the drain hole 8 and the opening 12.
  • a sensor 14 is attached to the line section 13, the output signals of which are via a Line 15 are given to a processing and control device 16. In it the Processed sensor signals in a manner not shown here.
  • the sensor 14 shown in Fig. 2 is housed in a housing, in the fork extensions 17 and 18 on the one hand as an optical transmitter an infrared LED 19 and on the other hand as optical receiver a photo transistor 20 are embedded. Your feed lines are also in the Housing embedded and lead to connections 21 and 22 of a connecting bar 23.
  • the pipe section 24 shown in section contains at least at the positions of the transmitter and the receiver (19 and 20) transparent areas 25, which are transmitted by the transmission beam 26 Infrared LED 19 can be penetrated.
  • the pipe section 24 has at the lower part of it Outer wall a base-like thickening 27 with a mounting surface 28. It is from the interior facing away from the tube 24 and facing the bridge 29 of the sensor housing. she serves for fastening the sensor 14, for which a screw hole 30 is provided in the bridge 29.
  • the line section 13 in Fig. 3 consists of a flexible line bend 31, on the one hand is buttoned into the opening 12 of the tub 2.
  • a support sleeve 32 is also provided.
  • the line bend contains to compensate for tolerances 31 a fold 33 and is equipped at the other end with a fastening grommet 34 which pushed over one end of the pipe section 24 and secured with a hose clamp 35 is.
  • the other end of the pipe section 24 is in a rubber grommet 36 of the drain line 9 and is also secured by a hose clamp 35.
  • the upper part 9 of the drain pipe is slightly longer than without the coupling of a line section 13 and has therefore a support ring 37 which carries a sealing lip 38 at the lower end, which together with A ball 39 seals the drain line.
  • the sensor 14 is on the base-like thickening 27 the pipe section 24 attached by means of a screw. For safe positioning at side walls 40 on the pipe section 24 also contribute to the assembly.
  • the senor 14 according to FIG. 4 is designed as a line bend 41 Pipe section attached.
  • the cable bend has a sharp kink and is at the opening 12 of the tub 2 buttoned by means of a rubber seal 43. It is one piece Part of the line section 13, with its straight part 42 in a rubber grommet 36 of the drain line 9 is inserted. Since the line section 13 in Fig. 4 is a rigid in itself Is formed, there is no need to secure the rubber grommet 36 by means of a hose clamp.
  • FIG. 5 Sensor 14 is also shown in FIG. 5 for a line section 13 attached to pipe section 50 in a similar manner as in the previous examples.
  • the Pipe section is designed as a continuously curved conduit bend 50, one has lower flow resistance than the line kink of the bend 41 in FIG. 4.
  • the line section 13 is formed in two parts. However, in contrast to what is shown in this embodiment also a one-piece design as in Fig. 4 possible. To do this, the Line section 13 may be formed as a blow molded part.
  • the second part of the line section 13 is a corrugated tube 51, the shafts 52 of which only serve to compensate for tolerances can. However, it has been shown that the tolerance compensation already through the rubber parts the button seal 43 and the rubber grommet 36 takes place in a sufficient manner.
  • a hose clamp 35 is required at two-part design of the line section 13 is also in turn on the rubber grommet 36 a hose clamp 35 is required.
  • the components of the line section shown in the exemplary embodiments in FIGS. 3 to 5 can be combined with one another in any way, depending on the environment given requirements.
  • the design of the housing 17, 18 and 29 is also the same of the sensor 14 in FIG. 2 can be changed in any way if the arrangement of the transmitter 19 and of the receiver 20 is maintained.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Optical Measuring Cells (AREA)
  • Centrifugal Separators (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

The fluid line between a drain opening at the bottom of the tub and an opening located at a higher level in the tub includes a line segment, which serves solely to keep the washwater in the tub in circulation between the upper opening and the drain opening. The line also has a solid pipe segment with a transparent region, at the wall of which a sensor is mounted that responds to the turbidity of the washwater. The sensor has an optical transmitter and an optical receiver. The sensor elements are built into a forked housing so as to securely mount and protect the sensor from the severe shaking during spin cycles. The forked housing embraces the pipe segment and the housing is adapted to the outer shape of the pipe segment at the faces which are in contact with the transparent region.

Description

Die Erfindung geht aus von einer Trommelwaschmaschine mit einer zwischen einem unten im Laugenbehälter angeordneten Ablaufloch und einer weiter oben im Laugenbehälter angeordneten Öffnung geführten mehrteiligen Flüssigkeitsleitung, die einen Leitungsabschnitt enthält, der ausschließlich dazu dient, die im Laugenbehälter befindliche Lauge in einem Umlauf zwischen Öffnung und Ablaufloch zu halten, und der einen Feststoff-Rohrabschnitt mit einem durchsichtigen Bereich aufweist, an dessen Wandung ein auf die Trübung der Lauge ansprechender, einen optischen Sender und einen optischen Empfänger enthaltender Sensor eingebaut ist.The invention relates to a drum washing machine with a between one in the bottom Suds container arranged drain hole and one located further up in the suds container Opening guided multi-part liquid line, which contains a line section, the only serves to circulate the lye in the tub between Hold opening and drain hole, and the one solid pipe section with a see-through Has an area on the wall of which responds to the cloudiness of the alkali, one optical transmitter and an optical receiver-containing sensor is installed.

Eine derartige Trommelwaschmaschine ist aus der DE 36 03 323 A 1 bekannt. Darin ist der Sensor soweit unten im Laugenablaufsystem eingebaut, daß im Laugenablaufsystem stehenbleibendes Wasser zur Verkalkung des transparenten Bereiches und zur Minderung der Transparenz führen kann, die vom Sensor aufgenommene Meßwerte verfälschen würde. Außerdem ist der bekannte Trübungssensor durch schwere Erschütterungen beim Schleudern belastet, weil der bekannte Leitungsabschnitt einerseits am schwingenden Laugenbehälter und andererseits an der ortsfesten Laugenpumpe befestigt ist. Die Laugenbehälterschwingungen übertragen sich daher auf den Sensor. Außerdem sind die Befestigungsstellen des Leitungsabschnitts dadurch sehr starken Belastungen unterworfen.Such a drum washing machine is known from DE 36 03 323 A1. In it is the Sensor installed so far down in the suds drain system that there remains in the suds drain system Water to calcify the transparent area and to reduce transparency can lead to falsify the measured values recorded by the sensor. Moreover the known turbidity sensor is subject to severe vibrations when spinning, because the known line section on the one hand on the vibrating tub and on the other is attached to the fixed drain pump. Transfer the tub vibrations therefore rely on the sensor. In addition, the attachment points of the line section subject to very heavy loads.

Der Erfindung liegt die Aufgabe zugrunde, bei einer eingangs beschriebenen Trommelwaschmaschine die Anordnung eines optischen Sensors für die Trübung der Lauge so zu gestalten, daß weder der Sensor noch die Befestigungen des Leitungsabschnitts durch Erschütterungen beim Schleudern zu stark belastet werden und daß der transparente Bereich des Rohrabschnitts nicht durch Kalkablagerungen getrübt wird.The invention has for its object in a drum washing machine described above to design the arrangement of an optical sensor for the cloudiness of the lye, that neither the sensor nor the fastenings of the line section due to vibrations too heavy when spinning and that the transparent area of the pipe section is not clouded by limescale.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß der Leitungsabschnitt einerseits an einen oberen Teil einer am Ablaufloch angeschlossenen Ablaufleitung und andererseits an der höher am Laugenbehälter gelegenen Öffnung angeschlossen ist und der Sensor in einem gabelartigen, den Rohrabschnitt umgreifenden Gehäuse eingebaut ist, das an den Kontaktflächen zum durchsichtigen Bereich der äußeren Form des Rohrabschnitts angepaßt ist. Auf diese Weise gelangt der Sensor in einen Bereich unterhalb des Laugenbehälters, in dem er nicht mehr dem dort ständig verbleibenden Laugenrest ausgesetzt ist, obwohl er zum Zwecke der Trübungsmessung der Lauge während des Waschens und/oder Spülens voll mit der jeweiligen Lauge beaufschlagt ist. Außerdem sind Erschütterungen während des Schleudems für den Sensor und die Befestigungen des Leitungsabschnitts unschädlich, weil der Leitungsabschnitt beidendig mit Anschlüssen gekoppelt ist, die gleichsinnig mit dem Laugenbehälter schwingen.According to the invention this object is achieved in that the line section on the one hand an upper part of a drain pipe connected to the drain hole and on the other hand on the is connected higher to the tub and the sensor in a fork-like, the pipe section encompassing housing is installed, which on the contact surfaces is adapted to the transparent area of the outer shape of the pipe section. To this In this way, the sensor reaches an area below the tub, in which it is not is more exposed to the remaining lye residue, although it is used for the purpose of Turbidity measurement of the alkali during washing and / or rinsing fully with the respective Alkali is applied. In addition, vibrations during the skidding are for the Sensor and the fastenings of the line section harmless because of the line section is connected at both ends to connections that swing in the same direction as the tub.

Zur sicheren Befestigung des Sensors hat der Rohrabschnitt an seiner Außenwandung eine sockelartige Verdickung mit einer Montagefläche, die vom Innenraum des Rohres abgewandt ist und zur Befestigung des Sensors dient.To securely attach the sensor, the pipe section has a on its outer wall base-like thickening with a mounting surface facing away from the interior of the tube and is used to attach the sensor.

In besonders vorteilhafter Weise enthält der eine Gabelfortsatz des Gehäuses als optischen Sender eine Infrarot-LED und der andere Gabelfortsatz als optischen Empfänger einen Fototransistor, die beide innerhalb des Gehäuses mit einer Verbindungsleiste elektrisch verbunden sind. Auf diese Weise haben Sender und Empfänger eine einmal festgelegte und unveränderliche Position zueinander.In a particularly advantageous manner, it contains a fork extension of the housing as an optical one Transmitter an infrared LED and the other fork extension as an optical receiver a photo transistor, both of which are electrically connected within the housing with a connecting bar are. In this way, the transmitter and receiver have a fixed and unchangeable one Position to each other.

Die Gabelfortsätze sind gemäß einer weiteren Fortbildung der Erfindung durch eine Brücke miteinander verbunden, die zur Positionierung der LED und des Fototransistors zueinander und zur Montage des Gehäuses an der sockelartigen Verdickung dient. Der Leitungsabschnitt der erfindungsgemäßen Waschmaschine ist in besonderer Weise dadurch ausgestaltet, daß der Rohrabschnitt mit dem oberen Teil der am Ablaufloch angeschlossenen Ablaufleitung flüssigkeitsdicht verbunden ist und über einen flexiblen Leitungsbogen mit der Öffnung im Laugenbehälter Verbindung hat. Der Leitungsbogen ist vorzugsweise deshalb flexibel gestaltet, damit der Leitungsabschnitt sich bei der Herstellung der Waschmaschine leicht montieren läßt. Dazu kann der Leitungsbogen aus einem gummiartigen Werkstoff gebildet sein und eine Falte aufweisen oder statt der Falte der Bogen durch mehrere Falten gebildet sein.According to a further development of the invention, the fork extensions are interconnected by a bridge connected to each other for positioning the LED and the phototransistor serves to mount the housing on the base-like thickening. The line section of the Washing machine according to the invention is designed in a special way that the Pipe section with the upper part of the drain line connected to the drain hole is liquid-tight is connected and via a flexible elbow to the opening in the tub Has connection. The line bend is therefore preferably designed to be flexible so that the Line section can be easily assembled in the manufacture of the washing machine. To the line bend can be formed from a rubber-like material and have a fold or instead of the fold, the arch can be formed by several folds.

In einer anderen vorteilhaften Weiterbildung der Erfindung bildet der Rohrabschnitt einen Leitungsbogen und ist an der Öffnung des Laugenbehälters angeschlossen. Dadurch gelangt der Sensor in eine höchstmögliche Position, die beim Betrieb der Waschmaschine immer noch mit Lauge beaufschlagt ist.In another advantageous development of the invention, the pipe section forms an elbow and is connected to the opening of the tub. This will get the Sensor in the highest possible position, which is still in use when the washing machine is in operation Alkali is applied.

Entweder kann in einer besonders vorteilhaften Weiterbildung der Erfindung der Rohrabschnitt einstückiger Bestandteil des Leitungsabschnitts sein oder an seinem von der Öffnung entfernten Ende mittels eines Rohres mit dem oberen Teil der am Ablaufloch angeschlossenen Ablaufleitung flüssigkeitsdicht verbunden sein. Im ersten Falle kann der gesamte Leitungsabschnitt aus einem festen Rohrbauteil bestehen oder dieses Rohrbauteil außerhalb des Rohrabschnitts eine mehrgliedrige Wellung aufweisen. Im zweiten Fall kann das Rohr entweder mit einer glatten Wandung versehen oder als Wellrohr ausgestaltet sein. In allen Fällen ist es für die ungehinderte Strömung der zu messenden Lauge von besonderem Vorteil, wenn der Rohrabschnitt stetig gekrümmt ist.In a particularly advantageous development of the invention, the pipe section can either be an integral part of the line section or on its remote from the opening End by means of a pipe with the upper part of the drain pipe connected to the drain hole be connected liquid-tight. In the first case, the entire line section consist of a solid pipe component or this pipe component outside the pipe section have a multi-part corrugation. In the second case, the pipe can either be smooth Provide wall or be designed as a corrugated tube. In all cases, it is for the unhindered Flow of the alkali to be measured is particularly advantageous if the pipe section is continuously curved.

Anhand der in der Zeichnung dargestellten Ausführungsbeispiele ist die Erfindung nachstehend erläutert.Based on the embodiments shown in the drawing, the invention is below explained.

Es zeigen

Fig. 1
eine schematische Darstellung einer Trommelwaschmaschine mit der erfindungsgemäßen Anordnung eines Sensors an einem Leitungsabschnitt,
Fig. 2
eine schematische Darstellung des gabelartigen Sensor-Gehäuses in einer Querschnitt-Darstellung des Rohrabschnitts,
Fig. 3
einen Längsschnitt durch eine Ausführungsform des Leitungsabschnitts mit einem faltigen Leitungsbogen aus Gummi,
Fig. 4
einen Schnitt gemäß Fig. 3 durch einen einteilig gestalteten Leitungsabschnitt mit festem Rohr und
Fig. 5
einen Schnitt gemäß Fig. 3 durch einen zweiteiligen Leitungsabschnitt mit Wellrohr.
Show it
Fig. 1
1 shows a schematic illustration of a drum washing machine with the arrangement according to the invention of a sensor on a line section,
Fig. 2
1 shows a schematic illustration of the fork-like sensor housing in a cross-sectional illustration of the pipe section,
Fig. 3
2 shows a longitudinal section through an embodiment of the line section with a wrinkled rubber line bend,
Fig. 4
a section of FIG. 3 through a one-piece line section with a fixed tube and
Fig. 5
a section of FIG. 3 through a two-part line section with corrugated tube.

Die in Fig.1 dargestellte Waschmaschine hat ein Gehäuse 1, in dem ein Laugenbehälter 2 auf hier nicht dargestellte Weise schwingfähig montiert ist. Im Laugenbehälter 2 ist die Wäschetrommel 3 horizontal drehbar gelagert. Im oberen Teil des Laugenbehälters 2 kann ihm über eine Leitung 4 aus einer Zuleitung 5 über ein Magnetventil 6 und einen Waschmittelkasten 7 Wasser und gegebenenfalls Waschmittel zugeführt werden. Im unteren Abschnitt des Laugenbehälters 2 ist mit einem Ablaufloch 8 eine Ablaufleitung 9 flüssigkeitsdicht verbunden, die über Falten 10 und eine weitere Leitung 11 an einer hier nicht dargestellten, fest im Gehäuse 1 montierten Laugenpumpe angeschlossen ist. Zwischen der Ablaufleitung 9 und einer weiteren, etwas höher als das Ablaufloch 8 liegenden Öffnung 12 ist ein Leitungsabschnitt 13 eingeschaltet, durch den während des Betriebs der Waschmaschine Lauge aus der Öffnung 12 ständig zur Ablaufleitung 9 und über das Ablaufloch 8 wieder in den Laugenbehälter 2 zurückströmt. Diese Strömung basiert auf geringen Druckunterschieden der Lauge über dem Ablaufloch 8 und der Öffnung 12.The washing machine shown in Figure 1 has a housing 1 in which a tub 2 on way not shown here is mounted to vibrate. The washing drum is in the tub 2 3 horizontally rotatable. In the upper part of the tub 2 it can over a line 4 from a supply line 5 via a solenoid valve 6 and a detergent box 7 Water and optionally detergent are added. In the lower section of the tub 2 is connected to a drain hole 8 a drain line 9 in a liquid-tight manner Folds 10 and a further line 11 on a not shown here, firmly mounted in the housing 1 Drain pump is connected. Between the drain line 9 and another, a line section 13 is switched on somewhat higher than the drain hole 8, by constantly leaching out of the opening 12 during operation of the washing machine flows back to the drain line 9 and via the drain hole 8 back into the tub 2. This flow is based on small pressure differences between the lye and the drain hole 8 and the opening 12.

An den Leitungsabschnitt 13 ist ein Sensor 14 angebaut, dessen Ausgangssignale über eine Leitung 15 an ein Verarbeitungs- und Steuergerät 16 abgegeben werden. Darin werden die Sensorsignale auf hier nicht näher dargestellte Weise verarbeitet.A sensor 14 is attached to the line section 13, the output signals of which are via a Line 15 are given to a processing and control device 16. In it the Processed sensor signals in a manner not shown here.

Der in Fig. 2 dargestellte Sensor 14 ist in einem Gehäuse untergebracht, in dessen Gabelfortsätze 17 und 18 einerseits als optischer Sender eine Infrarot-LED 19 und andererseits als optischer Empfänger ein Fototransistor 20 eingebettet sind. Ihre Zuleitungen sind ebenfalls im Gehäuse eingebettet und führen an Anschlüsse 21 und 22 einer Verbindungsleiste 23.The sensor 14 shown in Fig. 2 is housed in a housing, in the fork extensions 17 and 18 on the one hand as an optical transmitter an infrared LED 19 and on the other hand as optical receiver a photo transistor 20 are embedded. Your feed lines are also in the Housing embedded and lead to connections 21 and 22 of a connecting bar 23.

Der geschnitten dargestellte Rohrabschnitt 24 enthält zumindest an den Positionen des Senders und des Empfängers (19 und 20) transparente Bereiche 25, die vom Sendestrahl 26 der Infrarot-LED 19 durchdrungen werden können. Der Rohrabschnitt 24 hat am unteren Teil seiner Außenwandung eine sockelartige Verdickung 27 mit einer Montagefläche 28. Sie ist vom Innenraum des Rohres 24 abgewandt und der Brücke 29 des Sensorgehäuse zugewandt. Sie dient zur Befestigung des Sensors 14, wofür in der Brücke 29 ein Schraubenloch 30 vorgesehen ist.The pipe section 24 shown in section contains at least at the positions of the transmitter and the receiver (19 and 20) transparent areas 25, which are transmitted by the transmission beam 26 Infrared LED 19 can be penetrated. The pipe section 24 has at the lower part of it Outer wall a base-like thickening 27 with a mounting surface 28. It is from the interior facing away from the tube 24 and facing the bridge 29 of the sensor housing. she serves for fastening the sensor 14, for which a screw hole 30 is provided in the bridge 29.

Der Leitungsabschnitt 13 in Fig. 3 besteht aus einem flexiblen Leitungsbogen 31, der einerseits in die Öffnung 12 des Laugenbehälters 2 eingeknöpft ist. Zur Sicherung dieser Verbindung ist noch eine Stützhülse 32 vorgesehen. Zum Ausgleichen von Toleranzen enthält der Leitungsbogen 31 eine Falte 33 und ist am anderen Ende mit einer Befestigungstülle 34 ausgestattet, die über das eine Ende des Rohrabschnittes 24 geschoben und mit einer Schlauchklemme 35 gesichert ist. Das andere Ende des Rohrabschnitts 24 steckt in einer Gummitülle 36 der Ablaufleitung 9 und ist ebenfalls durch eine Schlauchklemme 35 gesichert. Die obere Teil 9 der Ablaufleitung ist etwas länger als ohne die Ankoppelung eines Leitungsabschnitts 13 und hat daher einen Stützring 37, der am unteren Ende eine Dichtlippe 38 trägt, die zusammmen mit einer Kugel 39 die Ablaufleitung dichtet Der Sensor 14 ist an der sockelartigen Verdickung 27 des Rohrabschnitts 24 mittels einer Schraube befestigt. Zur sicheren Lagepositionierung bei der Montage tragen noch seitliche Wände 40 am Rohrabschnitt 24 bei.The line section 13 in Fig. 3 consists of a flexible line bend 31, on the one hand is buttoned into the opening 12 of the tub 2. To secure this connection is a support sleeve 32 is also provided. The line bend contains to compensate for tolerances 31 a fold 33 and is equipped at the other end with a fastening grommet 34 which pushed over one end of the pipe section 24 and secured with a hose clamp 35 is. The other end of the pipe section 24 is in a rubber grommet 36 of the drain line 9 and is also secured by a hose clamp 35. The upper part 9 of the drain pipe is slightly longer than without the coupling of a line section 13 and has therefore a support ring 37 which carries a sealing lip 38 at the lower end, which together with A ball 39 seals the drain line. The sensor 14 is on the base-like thickening 27 the pipe section 24 attached by means of a screw. For safe positioning at side walls 40 on the pipe section 24 also contribute to the assembly.

In ähnlicher Weise ist der Sensor 14 gemäß Fig. 4 am als Leitungsbogen 41 ausgebildeten Rohrabschnitt angebaut. Der Leitungsbogen hat einen scharfen Knick und ist an der Öffnung 12 des Laugenbehälters 2 mittels einer Gummidichtung 43 eingeknöpft. Er ist einstückiger Bestandteil des Leitungsabschnitts 13, der mit seinem gerade geführten Teil 42 in eine Gummitülle 36 der Ablaufleitung 9 gesteckt ist. Da der Leitungsabschnitt 13 in Fig. 4 ein in sich starres Gebilde ist, erübrigt sich hier die Sicherung der Gummitülle 36 mittels einer Schlauchschelle.In a similar way, the sensor 14 according to FIG. 4 is designed as a line bend 41 Pipe section attached. The cable bend has a sharp kink and is at the opening 12 of the tub 2 buttoned by means of a rubber seal 43. It is one piece Part of the line section 13, with its straight part 42 in a rubber grommet 36 of the drain line 9 is inserted. Since the line section 13 in Fig. 4 is a rigid in itself Is formed, there is no need to secure the rubber grommet 36 by means of a hose clamp.

Auch in dem in Fig. 5 dargestellten Beispiel für einen Leitungsabschnitt 13 ist der Sensor 14 in ähnlicher Weise am Rohrabschnitt 50 befestigt wie in den vorstehenden Beispielen. Hier ist der Rohrabschnitt allerdings als ein stetig gekrümmter Leitungsbogen 50 ausgebildet, der einen geringeren Strömungswiderstand hat als der Leitungsknick des Bogens 41 in Fig. 4. Der Leitungsabschnitt 13 ist dagegen zweiteilig ausgebildet. Anders als dargestellt ist allerdings in dieser Ausführung ebenfalls eine einteilige Ausbildung wie in Fig. 4 möglich. Dazu müßte der Leitungsabschnitt 13 als Blasformteil ausgebildet sein. Der zweite Teil des Leitungsabschnitts 13 ist ein Wellrohr 51, dessen Wellen 52 lediglich zum Ausgleich von Toleranzen dienen können. Allerdings hat sich gezeigt, daß der Toleranzausgleich bereits durch die Gummiteile der Einknöpfdichtung 43 und der Gummitülle 36 in ausreichender Weise stattfindet. Bei zweiteiliger Ausbildung des Leitungsabschnitts 13 ist außerdem an der Gummitülle 36 wiederum eine Schlauchschelle 35 vonnöten.Sensor 14 is also shown in FIG. 5 for a line section 13 attached to pipe section 50 in a similar manner as in the previous examples. Here is the Pipe section, however, is designed as a continuously curved conduit bend 50, one has lower flow resistance than the line kink of the bend 41 in FIG. 4. The line section 13 is formed in two parts. However, in contrast to what is shown in this embodiment also a one-piece design as in Fig. 4 possible. To do this, the Line section 13 may be formed as a blow molded part. The second part of the line section 13 is a corrugated tube 51, the shafts 52 of which only serve to compensate for tolerances can. However, it has been shown that the tolerance compensation already through the rubber parts the button seal 43 and the rubber grommet 36 takes place in a sufficient manner. at two-part design of the line section 13 is also in turn on the rubber grommet 36 a hose clamp 35 is required.

Die in den Ausführungsbeispielen der Figuren 3 bis 5 dargestellten Bestandteile des Leitungsabschnitts sind in beliebiger Weise miteinander kombinierbar, je nach durch die jeweilige Umgebung gegebenen Anforderungen. Ebenso ist die Ausgestaltung des Gehäuses 17, 18 und 29 des Sensors 14 in Fig. 2 in jeder Weise veränderbar, wenn die Anordnung des Senders 19 und des Empfängers 20 beibehalten wird.The components of the line section shown in the exemplary embodiments in FIGS. 3 to 5 can be combined with one another in any way, depending on the environment given requirements. The design of the housing 17, 18 and 29 is also the same of the sensor 14 in FIG. 2 can be changed in any way if the arrangement of the transmitter 19 and of the receiver 20 is maintained.

Claims (13)

  1. Drum washing machine with a multi-part liquid duct which is led between an outflow hole (8) arranged at the bottom in the washing solution container (2) and an opening (12) arranged further above in the washing solution container and which includes a duct portion (13), which exclusively serves the purpose of keeping the washing solution disposed in the washing solution container in circulation between opening and outflow hole (8) and which comprises a solid material pipe section with a transparent region (25), at the wall of which there is incorporated a sensor (14) responding to the turbidity of the washing solution and containing an optical transmitter (19) and an optical receiver (20), characterised in that the duct portion (13) is connected at one end to an upper part (9) of an outflow duct (9 to 11) connected to the outflow hole (8) and at the other end to the opening (12) disposed higher at the washing solution container (2) and the sensor (14) is installed in a fork-shaped housing (17, 18, 29) which engages around the pipe section (24) and which is matched at the contact surfaces for the transparent region (25) to the external shape of the pipe section (24).
  2. Drum washing machine according to claim 1, characterised in that the pipe section (24) has at its outer wall a socket-like enlargement (27) with a mounting surface (28) which is remote from the interior space of the pipe (24) and serves for fastening the sensor (14).
  3. Drum washing machine according to claim 1 or 2, characterised in that the one fork protrusion (17) of the housing (17, 18, 29) contains an infrared LED (19) as optical transmitter and the other fork protrusion (18) contains a phototransistor (20) as optical receiver, which are both electrically connected within the housing (17, 18, 29) by a connecting strip (23).
  4. Drum washing machine according to claim 3, characterised in that the fork protrusions (17, 18) are connected together by a bridge (29), which serves for positioning the LED (19) and the phototransistor (20) relative to one another and for mounting the housing (17, 18, 29) at the socket-like enlargement (27).
  5. Drum washing machine according to one of claims 1 to 4, characterised in that the pipe section (24) is connected in liquid-tight manner with the upper part (9) of the outflow duct (9 to 11) connected with the outflow hole (8) and is connected by way of a flexible duct elbow (31) with the opening (12) in the washing solution container (2).
  6. Drum washing machine according to claim 5, characterised in that the duct elbow (31) is made of a rubber-like material and has a fold (33).
  7. Drum washing machine according to claim 5, characterised in that the duct elbow (31) is formed from a rubber-like material and the elbow is formed by several folds.
  8. Drum washing machine according to one of claims 1 to 4, characterised in that the pipe section (24) forms a duct elbow (41, 50) and is connected to the opening (12) of the washing solution container (2).
  9. Drum washing machine according to claim 8, characterised in that the pipe section (41) is an integral component of the duct portion (13).
  10. Drum washing machine according to claim 9, characterised in that the duct portion (13) has a multi-element corrugation outside the pipe section (50).
  11. Drum washing machine according to claim 8, characterised in that the pipe section (21, 50) is connected in liquid-tight manner at its end, which is remote from the opening (12), by means of a pipe (42, 51) with the upper part (9) of the outflow duct (9 to 11) connected to the outflow hole (8).
  12. Drum washing machine according to claim 11, characterised in that the pipe (51) is a corrugated pipe.
  13. Drum washing machine according to one of the preceding claims, characterised in that the pipe section (50) is constantly curved.
EP97119925A 1996-12-18 1997-11-13 Washing machine with a liquid pipe comprising several parts Expired - Lifetime EP0849390B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19652830A DE19652830A1 (en) 1996-12-18 1996-12-18 Drum washing machine with a multi-part liquid line
DE19652830 1996-12-18

Publications (3)

Publication Number Publication Date
EP0849390A2 EP0849390A2 (en) 1998-06-24
EP0849390A3 EP0849390A3 (en) 1999-01-20
EP0849390B1 true EP0849390B1 (en) 2002-06-12

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Application Number Title Priority Date Filing Date
EP97119925A Expired - Lifetime EP0849390B1 (en) 1996-12-18 1997-11-13 Washing machine with a liquid pipe comprising several parts

Country Status (12)

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US (1) US5881578A (en)
EP (1) EP0849390B1 (en)
KR (1) KR100453784B1 (en)
CN (1) CN1093197C (en)
AT (1) ATE219180T1 (en)
BR (1) BR9706361A (en)
DE (2) DE19652830A1 (en)
ES (1) ES2177882T3 (en)
NZ (1) NZ329427A (en)
PL (1) PL183831B1 (en)
RU (1) RU2170295C2 (en)
TR (1) TR199701590A3 (en)

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Also Published As

Publication number Publication date
KR19980063970A (en) 1998-10-07
EP0849390A3 (en) 1999-01-20
DE59707490D1 (en) 2002-07-18
KR100453784B1 (en) 2005-04-20
DE19652830A1 (en) 1998-06-25
ATE219180T1 (en) 2002-06-15
RU2170295C2 (en) 2001-07-10
PL323656A1 (en) 1998-06-22
PL183831B1 (en) 2002-07-31
TR199701590A2 (en) 1998-07-21
NZ329427A (en) 1999-10-28
EP0849390A2 (en) 1998-06-24
CN1185499A (en) 1998-06-24
US5881578A (en) 1999-03-16
BR9706361A (en) 1999-05-04
CN1093197C (en) 2002-10-23
ES2177882T3 (en) 2002-12-16
TR199701590A3 (en) 1998-07-21

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