EP1476599A1 - Cylinder washing machine with a front-loading cylinder - Google Patents

Cylinder washing machine with a front-loading cylinder

Info

Publication number
EP1476599A1
EP1476599A1 EP03704415A EP03704415A EP1476599A1 EP 1476599 A1 EP1476599 A1 EP 1476599A1 EP 03704415 A EP03704415 A EP 03704415A EP 03704415 A EP03704415 A EP 03704415A EP 1476599 A1 EP1476599 A1 EP 1476599A1
Authority
EP
European Patent Office
Prior art keywords
drum
washing machine
container
area
laundry
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
EP03704415A
Other languages
German (de)
French (fr)
Other versions
EP1476599B1 (en
Inventor
Eckehard Reinwald
Ingo Schulze
Stephan Sommer
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 EP1476599A1 publication Critical patent/EP1476599A1/en
Application granted granted Critical
Publication of EP1476599B1 publication Critical patent/EP1476599B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/02—Rotary receptacles, e.g. drums
    • D06F37/04—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a horizontal or inclined axis

Definitions

  • the invention relates to a drum washing machine with a laundry drum that can be loaded from the front, the jacket of which is perforated and which is surrounded by a container within which it is at least approximately horizontally suspended on its rear wall, and with a working section for spin-drying the laundry in the drum ,
  • Such so-called front loading washing machines regularly have a rubber sleeve as a watertight connection between the tub, which is mounted in a swinging manner, and the fixed housing opening.
  • a rubber sleeve is the one from DE 37 38 399 A1 which, in its deepest part, also has drainage holes to the tub, so that residual water does not remain in the folds of the sleeve.
  • Such residual water is particularly troublesome when spinning, namely when the swing-mounted suds container unit makes strong oscillating movements and the cuff tends to flutter violently. Then residual water is thrown up out of the cuff and gets back on the laundry from which it was just spun off. This process worsens the spin result.
  • the object of the invention is to take measures in a washing machine described at the outset which at least reduce, if not exclude, this rewetting effect and thereby also promise better reproducible residual moisture values for similar spin processes.
  • this object is achieved in that precautions are taken to ensure that essentially no air can flow from the container through the interior of the drum and back to the container during dry spinning.
  • This effect is also present in the lower area of the cuff without residual water, because the water wetting the laundry comes out of the tub and is carried away by the air flow.
  • a flow resistance is arranged in the path of a potential air flow from the container through the interior of the drum back to the container. Such a flow resistance would prevent the formation of an air flow as described or would at least reduce it to such an extent that the residual flow no longer has sufficient energy for the entrainment of centrifuged water from the tub.
  • a possible embodiment of such a flow resistance would be a barrier, which is arranged in the annular gap between the loading opening of the drum and the front opening of the container.
  • a further advantageous development of the invention consists in the fact that the drum jacket on a ring section which adjoins the rear wall of the drum has an at least lower specific perforation area fraction than on the ring section arranged closer to the loading opening. It was observed that, at the start of the spin section, the laundry was deposited primarily on the drum jacket in the front area of the laundry drum and left free the ring section near the rear wall. However, if there are also flood holes in the rear section that are not covered by the laundry, then the air sucked in through the loading opening during high-speed spinning can be pressed through these free flood holes into the surrounding tub and the ring flow is already established. If, on the other hand, there are no or smaller or only a few flood holes in this ring section, the flow resistance is too great for this potential air flow, and an essential flow does not even occur.
  • This embodiment of the invention is particularly advantageous because the laundry drum acquires greater mechanical rigidity as a result of the reduced perforated area in the rear region of the drum jacket. In addition, this measure naturally avoids additional means for increasing the flow resistance.
  • Some laundry drums are also perforated on the back wall to ensure a more intensive exchange of the wash liquor with the laundry.
  • the rear wall of the drum has an annular disk section which is adjacent to the drum jacket and has a lower specific perforation area fraction than the disk section arranged directly opposite the loading opening.
  • the area of the pane section of the rear wall corresponds at least approximately to the area of the loading opening.
  • This part of the perforated rear wall has the same pressure conditions as the coaxial loading opening.
  • the reduction in the specific proportion of perforated area can be achieved by omitting every sixth hole (with a total of 30 holes per row) in the first row of holes arranged on a circumferential line outside the fully perforated part. In each row of holes further away there can then be another hole or alternating one or two holes or progressively one, two, three etc. holes of a basic amount of six, seven, eight, nine or ten holes per integer / all (depending on the divisibility of the Total number of solderers per row) can be omitted.
  • FIG. 1 is a perspective view of a laundry drum, the end of which has been removed for a better view of the interior,
  • FIG. 3 shows an enlarged view of a triangular region of flood holes in the ring region of the drum casing according to FIG. 2,
  • FIG. 4 shows a development according to FIG. 2 with a lower specific perforation area proportion than in FIG. 2,
  • FIG. 5 shows an enlarged view of a triangular region of flood holes in the ring region of the drum casing according to FIG. 4
  • FIG. 6 shows a development according to FIG. 2 with a lower specific one
  • FIG. 7 is an enlarged view of a triangular area of flood holes in the ring area of the drum shell according to FIG. 6, 8 shows a development according to FIG. 2 with a lower specific perforation area proportion than in FIGS. 6 and
  • FIG. 9 is an enlarged view of a triangular area of flood holes in the ring area of the drum casing according to FIG. 8, the laundry drum 1 in FIG. 1 is rotatably mounted about an axis 2 arranged horizontally here and consists of a drum casing 3, a rear wall 4 and one not shown Front floor, which was removed for a better view of the interior of the drum.
  • the jacket 3 and the rear wall 4 are provided with flood holes 5 and 6 of any shape, which ensure the constant exchange of the wash liquor during the
  • the dashed arc lines indicate that the perforated surfaces expand in the relevant direction.
  • the rear wall 4 is provided in a known manner with a star-shaped embossing 7 for stabilization.
  • FIG. 1 it can already be seen that on the ring section 10, which adjoins the rear wall 4 of the drum 1 and is indicated by the two boundary lines 8 and 9, the specific proportion of perforated surface is considerably reduced compared to the other perforated surface. Similarly, the specific proportion of perforated area in an annular disk section 11 of the drum rear wall 4, which adjoins the drum casing 3, is reduced compared to the remaining perforated area of the rear wall 4. Only the surface of a pane section of the rear wall 4, which corresponds approximately to the surface of the opposite loading opening, is perforated over the entire surface, apart from the stiffening embossing.
  • FIG. 3 In the enlarged representation (FIG. 3) of a triangular area in accordance with the frame in FIG. 2, there are twenty hole locations, of which ten hole locations are occupied by flood holes 15 with a gray background. The unoccupied holes are marked with smaller white circles 16. Accordingly, there is a perforation area share of 50%.
  • a perforated area fraction of less than 50% can be achieved if the ring section 10 is designed according to FIGS. 4 to 9.
  • a continuous or discontinuous reduction of the specific perforated area fractions from front to rear would also be within the scope of the invention and will help the desired effect, the definition of the ring section only having to be defined unsharp.
  • the ring section can even be completely without holes so that the flow resistance is against ° °.
  • Adjust drum 1 if the rear wall is perforated at all.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

A cylinder washing machine includes a front-loading cylinder, the shell of which is provided with holes and is surrounded by a container. The cylinder washing machine includes a cycle for spin-drying the laundry contained in the cylinder. To prevent water that has already been spun out of the laundry from being transported back to the interior space of the cylinder during spin-drying, precautions are taken to prevent substantially any air from flowing from the container through the interior space of the cylinder and back to the container during spin-drying.

Description

Trommelwaschmaschine mit einer von vorn beschickbaren WäschetrommelDrum washing machine with a washing drum that can be loaded from the front
Die Erfindung betrifft eine Trommelwaschmaschine mit einer von der Stirnseite beschickbaren Wäschetrommel, deren Mantel gelocht ist und die von einem Behälter umgeben ist, innerhalb dem sie an ihrer Rückwand wenigstens annähernd horizontal fliegend gelagert ist, und mit einem Arbeitsabschnitt zum Trockenschleudern der in der Trommel befindlichen Wäsche.The invention relates to a drum washing machine with a laundry drum that can be loaded from the front, the jacket of which is perforated and which is surrounded by a container within which it is at least approximately horizontally suspended on its rear wall, and with a working section for spin-drying the laundry in the drum ,
Eine derartige Waschmaschine ist in EP 0 810 319 B1 beschrieben. Die fliegend gelagerte Wäschetrommel dieser Waschmaschine hat einen Trommelmantel mit gleichmäßig verteilten Flutlöchern, die beim Schleudern die aus der Wäsche ausgetriebene Feuchtigkeit in den Laugenbehälter abführen sollen. Flutlöcher entsprechend dieser bekannten Waschmaschine gleichmäßig über den Trommelmantel zu verteilen, ist notorisch, was u. a. auch die DE 1 259 283 B1 , DE 1 460 812 A1 und DE 1 460 840 A1 belegen, die ansonsten unterschiedlichste Konstruktionen und Werkstoffe für eine von der Stirnseite her beschickbare Wäschetrommel zeigen.Such a washing machine is described in EP 0 810 319 B1. The overhung laundry drum of this washing machine has a drum jacket with evenly distributed flood holes, which are intended to remove the moisture expelled from the laundry into the tub when spinning. Distributing flood holes according to this well-known washing machine evenly over the drum jacket is notorious what u. a. DE 1 259 283 B1, DE 1 460 812 A1 and DE 1 460 840 A1 also demonstrate that otherwise show a wide variety of constructions and materials for a laundry drum that can be loaded from the front.
Derartige sogenannte Frontlader-Waschmaschinen haben regelmäßig eine Gummimanschette als wasserdichte Verbindung zwischen dem Laugenbehälter, der schwingend gelagert ist, und der feststehenden Gehäuseöffnung. Als Beispiel für eine solche Gummimanschette sei hier diejenige aus der DE 37 38 399 A1 genannt, die in ihrer tiefsten Partie auch Ablauflöcher zum Laugenbehälter hin aufweist, damit in den Falten der Manschette nicht noch Restwasser stehen bleibt. Solches Restwasser stört vor allem beim Schleudern, wenn nämlich das schwingend aufgehängte Laugenbehälteraggregat starke Schwingbewegungen vollführt und die Manschette dabei zu heftigen Flatterbewegungen neigt. Dann wird Restwasser aus der Manschette hochgeschleudert und gelangt wieder auf die Wäsche, von der es gerade abgeschleudert wurde. Dieser Vorgang verschlechtert das Schleuderergebnis.Such so-called front loading washing machines regularly have a rubber sleeve as a watertight connection between the tub, which is mounted in a swinging manner, and the fixed housing opening. An example of such a rubber sleeve is the one from DE 37 38 399 A1 which, in its deepest part, also has drainage holes to the tub, so that residual water does not remain in the folds of the sleeve. Such residual water is particularly troublesome when spinning, namely when the swing-mounted suds container unit makes strong oscillating movements and the cuff tends to flutter violently. Then residual water is thrown up out of the cuff and gets back on the laundry from which it was just spun off. This process worsens the spin result.
Nun glaubten die Fachleute, mit dieser Maßnahme die geschilderten Probleme gelöst zu haben. Erstaunlichweise ist dieser Rückbenetzungs-Effekt aber trotz 5 der Ablauflöcher in der Manschette vorhanden. Woher kommt also noch das die Wäsche wieder benetzende Wasser?Now the experts believed that this measure had solved the problems described. Surprisingly, this rewetting effect is present despite 5 of the drain holes in the cuff. So where does the washing water come from?
Der Erfindung liegt die Aufgabe zugrunde, bei einer eingangs beschriebenen Waschmaschine Maßnahmen zu ergreifen, die diesen Rückbenetzungs-Effekt zumindest verringern, wenn nicht gar ausschließen und dadurch auch besser 0 reproduzierbare Restfeuchtewerte für gleichartige Schleuderprozesse versprechen.The object of the invention is to take measures in a washing machine described at the outset which at least reduce, if not exclude, this rewetting effect and thereby also promise better reproducible residual moisture values for similar spin processes.
Gemäß der vorliegenden Erfindung wird diese Aufgabe dadurch gelöst, dass Vorkehrungen dafür getroffen sind, dass während des Trockenschleudems vom Behälter durch den Innenraum der Trommel und zurück zum Behälter im wesent- 5 liehen keine Luft strömen kann.According to the present invention, this object is achieved in that precautions are taken to ensure that essentially no air can flow from the container through the interior of the drum and back to the container during dry spinning.
Es wurde nämlich gefunden, dass während des Schleuderns vornehmlich die hinteren Flutlöcher des Trommelmantels nicht ausreichend mit Wäsche bedeckt sind, um auch dort die Flutlöcher zu verdecken. Begünstigt wird dieser Effekt durch die einseitige Achslagerung bei einer Frontlader-Waschmaschine mit we- :0 nigstens annähernd horizontaler Trommelachse und die damit verbundenen größeren Auslenkungen der rotierenden Wäschetrommel im vorderen Bereich. Dadurch wird nämlich der an der Innenseite des Trommelmantels angelegte Wäschering verstärkt in axialer Richtung nach vorn transportiert.It was found that the rear flood holes of the drum casing, in particular, were not sufficiently covered with laundry to cover the flood holes there as well. This effect is favored by the one-sided axle bearing in a front-loading washing machine with at least an approximately horizontal drum axis and the associated larger deflections of the rotating laundry drum in the front area. As a result, the laundry ring placed on the inside of the drum shell is increasingly transported forward in the axial direction.
Durch die daher im hinteren Bereich der Trommel vermehrt freiliegenden Flutlö- !5 eher bildet sich insbesondere bei höheren Schleuderdrehzahlen als 1400 Upm an der Wäschetrommel ein Luftstrom aus, weil die Trommel nun gewissermaßen als Radialventilatorrad wirken kann. Sie zieht dann nämlich Luft über die zentrale Beschickungsöffnung an und drückt sie durch die freiliegenden Flutlöcher in den Zwischenraum zwischen Trommel und Laugenbehälter, von wo sie wieder durch so den schmalen Spalt zwischen Laugenbehälter-Frontöffnung und Beschickungsöffnung der Trommel zur zentralen Öffnung an der Manschette gelangt. Wahr- scheinlich wird dieser Effekt sogar noch durch Wasser unterstützt, das aus der tiefsten Partie der Manschette von dem zusätzlich durch die Ablauflöcher in der Manschette gesaugten Luftstrom mitgerissen wird. Das auf diesen Wegen vom Luftstrom mitgerissene Wasser wird von der Beschickungsöffnung her wieder auf die Wäsche geführt.As a result of the increased exposure to flooding in the rear area of the drum, an air flow is formed on the laundry drum, in particular at higher spin speeds than 1400 rpm, because the drum can now act as a radial fan wheel. It then draws air through the central loading opening and pushes it through the exposed flood holes into the space between the drum and the tub, from where it passes through the narrow gap between the front opening of the tub and the loading opening of the drum to the central opening on the cuff. True- this effect is apparently even supported by water, which is entrained from the deepest part of the cuff by the air flow additionally sucked through the drain holes in the cuff. The water entrained in this way by the air flow is led back to the laundry from the loading opening.
Dieser Effekt ist auch ohne Restwasser im unteren Bereich der Manschette vorhanden, weil das die Wäsche wieder benetzende Wasser aus dem Laugenbehälter kommt und von dort mit der Luftströmung mitgerissen wird.This effect is also present in the lower area of the cuff without residual water, because the water wetting the laundry comes out of the tub and is carried away by the air flow.
Durch die vorliegende Erfindung können die zuvor beschriebenen Nachteile nun verhindert werden. Einerseits sind damit nämlich geringere Restfeuchtewerte erzielbar als ohne die erfindungsgemäßen Maßnahmen und andererseits sind diese Werte bei vergleichbaren Schleuderprozessen reproduzierbar. Falls beim Schleudern die Manschette starke Flatterbewegungen vollführt, können zwar noch Wassertropfen hochspritzen; sie gelangen mangels des nahezu vermiede- nen Luftstroms aber nicht mehr in den Trommelinnenraum, so dass auch hierdurch kein Rückbenetzungseffekt mehr zu befürchten ist.The disadvantages described above can now be prevented by the present invention. On the one hand, lower residual moisture values can thus be achieved than without the measures according to the invention, and on the other hand these values can be reproduced in comparable centrifugal processes. If the cuff makes strong fluttering movements when spinning, water drops can still splash up; However, due to the lack of virtually avoided air flow, they no longer get into the interior of the drum, so that there is no longer any fear of a rewetting effect.
In Weiterbildung der erfindungsgemäßen Vorkehrungen ist im Weg eines potentiellen Luftstromes aus dem Behälter durch den Innenraum der Trommel zurück zum Behälter ein Strömungswiderstand angeordnet. Ein solcher Strömungswi- derstand würde die Ausbildung eines beschriebenen Luftstromes unterbinden oder doch zumindest so weit vermindern, dass der Reststrom nicht mehr genügend Energie für die Mitführung von abgeschleudertem Wasser aus dem Laugenbehälter aufweist.In a further development of the precautions according to the invention, a flow resistance is arranged in the path of a potential air flow from the container through the interior of the drum back to the container. Such a flow resistance would prevent the formation of an air flow as described or would at least reduce it to such an extent that the residual flow no longer has sufficient energy for the entrainment of centrifuged water from the tub.
Eine mögliche Ausbildung eines solchen Strömungswiderstandes wäre eine Sperre, die im ringförmigen Spalt zwischen der Beschickungsöffnung der Trommel und der Frontöffnung des Behälters angeordnet ist.A possible embodiment of such a flow resistance would be a barrier, which is arranged in the annular gap between the loading opening of the drum and the front opening of the container.
Eine weitere vorteilhafte Weiterbildung der Erfindung besteht darin, dass der Trommelmantel auf einem Ringabschnitt, der an die Rückwand der Trommel anschließt, einen zumindest geringeren spezifischen Lochflächenanteil aufweist als auf dem näher der Beschickungsöffnung angeordneten Ringabschnitt. Es wude nämlich beobachtet, dass die Wäsche sich beim Beginn des Schleuderabschnitts vornehmlich im vorderen Bereich der Wäschetrommel am Trommelmantel anlagert und den rückwandnahen Ringabschnitt frei lässt. Sind dann aber im hinteren Abschnitt ebenfalls Flutlöcher vorhanden, die von der Wäsche nicht abgedeckt sind, dann kann die durch die Beschickungsöffnung während des hochtourigen Schleuderns angesaugte Luft durch diese freien Flutlöcher in den umgebenden Laugenbehälter gedrückt werden und schon kommt die Ringströmung zustande. Sind hingegen in diesem Ringabschnitt keine oder kleinere oder nur wenige Flutlöcher vorhanden, dann ist der Strömungswiderstand für diese potentielle Luftströmung zu groß, und eine wesentliche Strömung kommt gar nicht erst zustande.A further advantageous development of the invention consists in the fact that the drum jacket on a ring section which adjoins the rear wall of the drum has an at least lower specific perforation area fraction than on the ring section arranged closer to the loading opening. It was observed that, at the start of the spin section, the laundry was deposited primarily on the drum jacket in the front area of the laundry drum and left free the ring section near the rear wall. However, if there are also flood holes in the rear section that are not covered by the laundry, then the air sucked in through the loading opening during high-speed spinning can be pressed through these free flood holes into the surrounding tub and the ring flow is already established. If, on the other hand, there are no or smaller or only a few flood holes in this ring section, the flow resistance is too great for this potential air flow, and an essential flow does not even occur.
Besonders vorteilhaft ist diese Ausbildung der Erfindung deshalb, weil durch die verminderte Lochfläche im hinteren Bereich des Trommelmantels die Wäschetrommel eine höhere mechanische Steifigkeit erwirbt. Außerdem vermeidet diese Maßnahme natürlich zusätzliche Mittel zur Erhöhung des Strömungswiderstands.This embodiment of the invention is particularly advantageous because the laundry drum acquires greater mechanical rigidity as a result of the reduced perforated area in the rear region of the drum jacket. In addition, this measure naturally avoids additional means for increasing the flow resistance.
Als besonders vorteilhaft haben sich Abmessungen des Ringabschnittes erwiesen, bei der die Breite des Ringabschnitts etwa ein Zehntel der Breite des vollflächig gelochten Teils des Trommelmantels misst. Dabei ist es völlig ausreichend, wenn die spezifische Gesamt-Lochfläche in diesem Ringabschnitt etwa 50% der Lochfläche gegenüber derjenigen im vorderen Bereich der Wäschetrommel beträgt.Dimensions of the ring section in which the width of the ring section measures approximately one tenth of the width of the fully perforated part of the drum shell have proven to be particularly advantageous. It is entirely sufficient if the specific total perforated area in this ring section is approximately 50% of the perforated area compared to that in the front area of the laundry drum.
Manche Wäschetrommeln sind auch an ihrer Rückwand gelocht, um einen intensiveren Austausch der Waschflotte mit der Wäsche zu gewährleisten. In Anwendung und Weiterbildung der Erfindung weist in einer derartigen Waschmaschine die Rückwand der Trommel einen Ringscheibenabschnitt auf, der an den Trommelmantel angrenzt und einen geringeren spezifischen Lochflächenanteil aufweist als der unmittelbar gegenüber der Beschickungsöffnung angeordnete Scheibenabschnitt.Some laundry drums are also perforated on the back wall to ensure a more intensive exchange of the wash liquor with the laundry. In application and development of the invention, in such a washing machine the rear wall of the drum has an annular disk section which is adjacent to the drum jacket and has a lower specific perforation area fraction than the disk section arranged directly opposite the loading opening.
Dabei ist weiterhin von Vorteil, wenn die Fläche des Scheibenabschnittes der Rückwand wenigstens annähernd der Fläche der Beschickungsöffnung entspricht. Dieser Teil der gelochten Rückwand hat nämlich dieselben Druckverhältnisse wie die gleichachsige Beschickungsöffnung.It is also advantageous if the area of the pane section of the rear wall corresponds at least approximately to the area of the loading opening. This part of the perforated rear wall has the same pressure conditions as the coaxial loading opening.
Die Minderung des spezifischen Lochflächenanteils kann dadurch erreicht werden, dass in der ersten außerhalb des vollflächig gelochten Teils auf einer Umfangslinie angeordneten Lochreihe jedes sechste Loch (bei einer Gesamtmenge von 30 Löchern je Reihe) ausgelassen wird. In jeder weiter entfernten Lochreihe kann dann je ein weiteres Loch oder abwechselnd ein oder zwei Löcher oder progressiv eines, zwei, drei usw. Löcher von einer Grundmenge von sechs, sieben, acht, neun oder zehn Löchern pro Inten/all (je nach Teilbarkeit der Gesamtmenge von Lö- ehern pro Reihe) ausgelassen werden.The reduction in the specific proportion of perforated area can be achieved by omitting every sixth hole (with a total of 30 holes per row) in the first row of holes arranged on a circumferential line outside the fully perforated part. In each row of holes further away there can then be another hole or alternating one or two holes or progressively one, two, three etc. holes of a basic amount of six, seven, eight, nine or ten holes per integer / all (depending on the divisibility of the Total number of solderers per row) can be omitted.
Anhand von in der Zeichnung dargestellten Ausführungsbeispielen ist die Erfindung nachstehend erläutert. Es zeigenThe invention is explained below on the basis of exemplary embodiments shown in the drawing. Show it
Fig. 1 eine perspektivische Ansicht einer Wäschtrommel, deren Stirnboden zum besseren Einblick in den Innenraum abgenommen wurde,1 is a perspective view of a laundry drum, the end of which has been removed for a better view of the interior,
Fig. 2 einen Teil einer Abwicklung des Trommelmantels mit einer Form der Verringerung des spezifischen Lochflächenanteils im Ringbereich nahe der Trommelrückwand,2 shows a part of a development of the drum shell with a form of reduction of the specific perforation area in the ring area near the rear wall of the drum,
Fig. 3 eine vergrößerte Ansicht eines Dreiecksbereichs von Flutlöchern im Ringbereich des Trommelmantels gemäß Fig. 2,3 shows an enlarged view of a triangular region of flood holes in the ring region of the drum casing according to FIG. 2,
Fig. 4 eine Abwicklung gemäß Fig. 2 mit einem geringeren spezifischen Lochflächenanteil als in Fig. 2,4 shows a development according to FIG. 2 with a lower specific perforation area proportion than in FIG. 2,
Fig. 5 eine vergrößerte Ansicht eines Dreiecksbereichs von Flutlöchem im Ringbereich des Trommelmantels gemäß Fig. 4, Fig. 6 eine Abwicklung gemäß Fig. 2 mit einem geringeren spezifischen5 shows an enlarged view of a triangular region of flood holes in the ring region of the drum casing according to FIG. 4, FIG. 6 shows a development according to FIG. 2 with a lower specific one
Lochflächenanteil als in Fig. 4,Perforated area proportion than in FIG. 4
Fig. 7 eine vergrößerte Ansicht eines Dreiecksbereichs von Flutlöchern im Ringbereich des Trommelmantels gemäß Fig. 6, Fig. 8 eine Abwicklung gemäß Fig. 2 mit einem geringeren spezifischen Lochflächenanteil als in Fig. 6 und7 is an enlarged view of a triangular area of flood holes in the ring area of the drum shell according to FIG. 6, 8 shows a development according to FIG. 2 with a lower specific perforation area proportion than in FIGS. 6 and
Fig. 9 eine vergrößerte Ansicht eines Dreiecksbereichs von Flutlöchern im Ringbereich des Trommelmantels gemäß Fig. 8, Die Wäschetrommel 1 in Fig. 1 ist um eine hier horizontal angeordnete Achse 2 drehbar gelagert und besteht aus einem Trommelmantel 3, einer Rückwand 4 und einem nicht dargestellten Stirnboden, der zum besseren Einblick in den Innenraum der Trommel abgenommen wurde.9 is an enlarged view of a triangular area of flood holes in the ring area of the drum casing according to FIG. 8, the laundry drum 1 in FIG. 1 is rotatably mounted about an axis 2 arranged horizontally here and consists of a drum casing 3, a rear wall 4 and one not shown Front floor, which was removed for a better view of the interior of the drum.
Der Mantel 3 und die Rückwand 4 sind mit Flutlöchern 5 bzw. 6 beliebiger For- mung versehen, die dem ständigen Austausch der Waschflotte während derThe jacket 3 and the rear wall 4 are provided with flood holes 5 and 6 of any shape, which ensure the constant exchange of the wash liquor during the
Waschphase dienen. Die gestrichelten Bogenlinien deuten an, dass sich die gelochten Flächen in der betreffenden Richtung ausdehnen. Während des Schleuderabschnittes wird durch die Flutlöcher 5 des Trommelmantels 3 der größte Teil der nach dem Spülprozess in der Wäsche noch vorhandenen Spülflotte vom Trommelmantel abgeschleudert. Die Rückwand 4 ist in bekannter Weise zur Stabilisierung mit einer sternförmigen Prägung 7 versehen.Serve washing phase. The dashed arc lines indicate that the perforated surfaces expand in the relevant direction. During the spin section, most of the washing liquor still present in the laundry after the washing process is thrown off the drum jacket through the flood holes 5 of the drum jacket 3. The rear wall 4 is provided in a known manner with a star-shaped embossing 7 for stabilization.
In Fig. 1 ist bereits zu erkennen, dass auf dem Ringabschnitt 10, der an die Rückwand 4 der Trommel 1 anschließt und durch die beiden Grenzlinien 8 und 9 angedeutet ist, der spezifische Lochflächenanteil gegenüber der übrigen gelochten Flä- ehe erheblich vermindert ist. In ähnlicher Weise ist auch der spezifische Lochflächenanteil in einem Ringscheibenabschnitt 11 der Trommelrückwand 4, der an den Trommelmantel 3 angrenzt, gegenüber der übrigen gelochten Fläche der Rückwand 4 vermindert. Lediglich die Fläche eines Scheibenabschnitts der Rückwand 4, die etwa der Fläche der gegenüberliegenden Beschickungsöffnung ent- spricht, ist - abgesehen von der versteifenden Prägung - vollflächig gelocht.In FIG. 1 it can already be seen that on the ring section 10, which adjoins the rear wall 4 of the drum 1 and is indicated by the two boundary lines 8 and 9, the specific proportion of perforated surface is considerably reduced compared to the other perforated surface. Similarly, the specific proportion of perforated area in an annular disk section 11 of the drum rear wall 4, which adjoins the drum casing 3, is reduced compared to the remaining perforated area of the rear wall 4. Only the surface of a pane section of the rear wall 4, which corresponds approximately to the surface of the opposite loading opening, is perforated over the entire surface, apart from the stiffening embossing.
In den Fig. 2 bis 9 sind unterschiedliche Lochmuster der Ringabschnitte 10 gezeigt, die unterschiedlich große spezifische Lochflächenanteile haben. Die vollflächig gelochten Abschnitte 12 sind durch die Randreihen 13 und 14 der Löcher gesäumt; zwischen diesen Randreihen sind selbstverständlich in gleicherweise wie am oberen Rand 13 Lochreihen angeordnet bis hin zur untersten durchgehenden Lochreihe 14. So sind die Lochflächenanteile im Ringabschnitt 10 in Fig. 2 und 3 auf 50% des Lochflächenanteils im Abschnitt 12 vermindert. Dies wird dadurch erreicht, dass sich gleichgroße Dreiecksbereiche von Lochungen und lochfreien Flächen entlang einer Mantellinie abwechseln. Kommen nun während des Schleuderabschnitts keine Wäscheteile über dem Ringabschnitt 10 zu liegen, dann ist der Strömungswiderstand durch den verminderten Lochflächenanteil dennoch so groß, dass er das Entstehen einer oben geschilderten, geschlossenen Strömung wenigstens behindert.2 to 9 different hole patterns of the ring sections 10 are shown, which have different sized specific hole area portions. The fully perforated sections 12 are hemmed by the edge rows 13 and 14 of the holes; between these rows of holes are of course arranged in the same way as on the upper edge 13 rows of holes down to the lowest continuous row of holes 14. The perforated surface portions in the ring section 10 in FIGS. 2 and 3 are reduced to 50% of the perforated surface portion in the section 12. This is achieved in that triangular areas of equal size alternate between perforations and non-perforated areas along a surface line. If no laundry items come to lie over the ring section 10 during the spin section, the flow resistance due to the reduced proportion of perforated area is nevertheless so great that it at least hinders the development of a closed flow described above.
In der vergrößerten Darstellung (Fig. 3) eines Dreiecksbereiches gemäß der Um- rahmung in Fig. 2 sind zwanzig Lochplätze vorhanden, von denen zehn Lochplätze mit grau unterlegten Flutlöchern 15 besetzt sind. Die nicht besetzten Lochplätze sind mit kleineren weißen Kreisen 16 gekennzeichnet. Entsprechend ergibt sich ein Lochflächenanteil von 50%.In the enlarged representation (FIG. 3) of a triangular area in accordance with the frame in FIG. 2, there are twenty hole locations, of which ten hole locations are occupied by flood holes 15 with a gray background. The unoccupied holes are marked with smaller white circles 16. Accordingly, there is a perforation area share of 50%.
Ein Lochflächenanteil von unter 50% ist erreichbar, wenn man den Ringabschnitt 10 gemäß Fig. 4 bis 9 gestaltet.A perforated area fraction of less than 50% can be achieved if the ring section 10 is designed according to FIGS. 4 to 9.
In Fig. 4 und 5 sind von zwanzig möglichen Plätzen in einem Dreiecksbereich nur noch neun durch Löcher 15 besetzt. Damit ist also ein Lochflächenanteil von nur noch 45% gegenüber der vollflächigen Lochbesetzung zu erzielen. Entsprechend höher ist der Strömungswiderstand. Bei dem Ausführungsbeispiel in Fig. 6 und 7 ist ein Lochflächenanteil von nur noch 40% vorhanden, weil in einem Dreiecksbereich nur noch acht von zwanzig Lochplätzen durch Löcher 15 besetzt sind.4 and 5, of the twenty possible places in a triangular area, only nine are still occupied by holes 15. This means that a perforation area share of only 45% can be achieved compared to the full-area hole occupation. The flow resistance is correspondingly higher. In the exemplary embodiment in FIGS. 6 and 7, a perforation area share of only 40% is present, because in a triangular region only eight out of twenty perforation spaces are occupied by holes 15.
Im Ausführungsbeispiel der Fig. 8 und 9 sind gar nur noch sieben von zwanzig Lochplätzen durch grau unterlegte Löcher 15 besetzt, so dass ein Lochflächenan- teil von 35% zu errechnen ist.In the exemplary embodiment in FIGS. 8 and 9, only seven out of twenty hole positions are occupied by holes 15 with a gray background, so that a hole area share of 35% can be calculated.
Mit entsprechenden Variationen von Dreiecksbereichen im Ringabschnitt 10 sind auch andere mehr oder minder knappe Lochflächenanteile zu erzielen, so dass man sehr genau mit anderen Werten für Lochflächenanteile diverse unterschiedliche Strömungswiderstände einstellen kann. Anstelle der Verringerung der Lochflächenanteile durch Verminderung der Lochzahl pro Flächeneinheit oder zusätzlich zu ihr können die Flutlöcher im hinterern Bereich auch einen kleineren Durchmesser haben als im vorderen, von der Wäsche sicher bedeckten Bereich. Auf diese Weise würde der Strömungswiderstand ebenfalls vergrößert werden.With corresponding variations of triangular areas in the ring section 10, other more or less scarce perforated surface portions can also be achieved, so that various different flow resistances can be set very precisely with different values for perforated surface portions. Instead of reducing the perforation area by reducing the number of holes per unit area or in addition to it, the flood holes in the rear area can also have a smaller diameter than in the front area, which is safely covered by the laundry. In this way the flow resistance would also be increased.
Eine kontinuierliche oder diskontinuierliche Verringerung der spezifischen Lochflächenanteile von vorn nach hinten würde ebenfalls im Rahmen der Erfindung liegen und wird dem gewünschten Effekt helfen, wobei die Eingrenzung des Ringabschnitts nur noch unscharf zu definieren wäre.A continuous or discontinuous reduction of the specific perforated area fractions from front to rear would also be within the scope of the invention and will help the desired effect, the definition of the ring section only having to be defined unsharp.
Schließlich kann der Ringabschnitt sogar völlig ohne Löcher ausgestattet sein, damit der Strömungswiderstand gegen °° geht.Finally, the ring section can even be completely without holes so that the flow resistance is against ° °.
Entsprechend zu den hier gezeigten Ausführungsbeispielen lässt sich auch derCorresponding to the exemplary embodiments shown here, the
Strömungswiderstand eines Ringscheibenabschnitts 11 der Rückwand 4 einerFlow resistance of an annular disc portion 11 of the rear wall 4 one
Wäschetrommel 1 einstellen, sofern die Rückwand überhaupt gelocht ist. Adjust drum 1 if the rear wall is perforated at all.

Claims

P a te n ta n s p r ü c h e Patent claims
1. Trommelwaschmaschine mit einer von der Stirnseite beschickbaren Wäschetrommel (1), deren Mantel (3) gelocht ist und die von einem Behälter umgeben ist, innerhalb dem sie an ihrer Rückwand (4) wenigstens annähernd horizontal fliegend gelagert ist, und mit einem Arbeitsabschnitt zum Trockenschleudern der in der Trommel (1) befindlichen Wäsche, dadurch gekennzeichnet, dass Vorkehrungen dafür getroffen sind, dass während des Trockenschleudems vom Behälter durch den Innenraum der Trommel (1) und zurück zum Behälter im wesentlichen keine Luft strömen kann.1. drum washing machine with a laundry drum (1) which can be loaded from the front side, the jacket (3) of which is perforated and which is surrounded by a container within which it is at least approximately horizontally overhung on its rear wall (4), and with a working section for Spin-drying the laundry in the drum (1), characterized in that provision is made so that essentially no air can flow from the container through the interior of the drum (1) and back to the container during the spin-drying process.
2. Trommelwaschmaschine nach Anspruch 1 , dadurch gekennzeichnet, dass im Weg eines potentiellen Luftstromes aus dem Behälter durch den Innenraum der Trommel (1) zurück zum Behälter ein Strömungswiderstand angeordnet ist.2. Drum washing machine according to claim 1, characterized in that a flow resistance is arranged in the path of a potential air flow from the container through the interior of the drum (1) back to the container.
3. Trommelwaschmaschine nach Anspruch 2, dadurch gekennzeichnet, dass der Strömungswiderstand aus einer Sperre besteht, die im ringförmigen Spalt zwischen der Beschickungsöffnung der Trommel (1) und der Frontöffnung des Behälters angeordnet ist.3. Drum washing machine according to claim 2, characterized in that the flow resistance consists of a barrier which is arranged in the annular gap between the loading opening of the drum (1) and the front opening of the container.
4. Trommelwaschmaschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Trommelmantel (3) auf einem Ringabschnitt (10), der an die Rückwand (4) der Trommel (1) anschließt, einen zumindest geringeren spezifischen Lochflächenanteil aufweist als auf dem näher der Beschickungsöffnung angeordneten Ringabschnitt (12). 4. Drum washing machine according to one of claims 1 to 3, characterized in that the drum shell (3) on a ring portion (10) which adjoins the rear wall (4) of the drum (1) has an at least lower specific perforation area than on the ring section (12) arranged closer to the loading opening.
5. Trommelwaschmaschine nach Anspruch 4, dadurch gekennzeichnet, dass die Breite des Ringabschnitts (10) etwa ein Zehntel der Breite des vollflächig gelochten Teils (12) des Trommelmantels (3) misst.5. Drum washing machine according to claim 4, characterized in that the width of the ring section (10) measures approximately one tenth of the width of the fully perforated part (12) of the drum shell (3).
6. Trommelwaschmaschine nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Rückwand (4) der Trommel (1) einen Ringscheibenabschnitt (11) aufweist, der an den Trommelmantel (3) angrenzt und einen geringeren spezifischen Lochflächenanteil aufweist als der unmittelbar gegenüber der Beschickungsöffnung angeordnete Scheibenabschnitt.6. Drum washing machine according to one of the preceding claims, characterized in that the rear wall (4) of the drum (1) has an annular disc portion (11) which is adjacent to the drum shell (3) and has a lower specific perforation area than that directly opposite the loading opening arranged disc section.
7. Trommelwaschmaschine nach Anspruch 6, dadurch gekennzeichnet, dass die Fläche des Scheibenabschnittes der Rückwand (4) wenigstens annähernd der Fläche der Beschickungsöffnung entspricht. 7. drum washing machine according to claim 6, characterized in that the area of the disc section of the rear wall (4) corresponds at least approximately to the area of the loading opening.
EP03704415A 2002-02-08 2003-01-16 Cylinder washing machine with a front-loading cylinder Expired - Lifetime EP1476599B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10205306A DE10205306B4 (en) 2002-02-08 2002-02-08 Drum washing machine with a front-loading laundry drum
DE10205306 2002-02-08
PCT/EP2003/000418 WO2003066952A1 (en) 2002-02-08 2003-01-16 Cylinder washing machine with a front-loading cylinder

Publications (2)

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EP1476599A1 true EP1476599A1 (en) 2004-11-17
EP1476599B1 EP1476599B1 (en) 2010-03-24

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EP (1) EP1476599B1 (en)
KR (1) KR100802263B1 (en)
CN (1) CN100519891C (en)
AT (1) ATE462036T1 (en)
DE (2) DE10205306B4 (en)
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ATE462036T1 (en) 2010-04-15
DE50312550D1 (en) 2010-05-06
CN1630752A (en) 2005-06-22
KR20040081142A (en) 2004-09-20
PL369898A1 (en) 2005-05-02
EP1476599B1 (en) 2010-03-24
US7082793B2 (en) 2006-08-01
US20050044899A1 (en) 2005-03-03
WO2003066952A1 (en) 2003-08-14
DE10205306A1 (en) 2003-08-21
CN100519891C (en) 2009-07-29
PL201064B1 (en) 2009-03-31
DE10205306B4 (en) 2006-12-28

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