EP0935687A1 - Cylinder washing machine - Google Patents

Cylinder washing machine

Info

Publication number
EP0935687A1
EP0935687A1 EP97950062A EP97950062A EP0935687A1 EP 0935687 A1 EP0935687 A1 EP 0935687A1 EP 97950062 A EP97950062 A EP 97950062A EP 97950062 A EP97950062 A EP 97950062A EP 0935687 A1 EP0935687 A1 EP 0935687A1
Authority
EP
European Patent Office
Prior art keywords
drum
washing machine
holes
drum washing
jacket
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
EP97950062A
Other languages
German (de)
French (fr)
Other versions
EP0935687B1 (en
Inventor
Wolfgang Hellhake
Siegfried Augustin
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.)
Miele und Cie KG
Original Assignee
Miele und Cie KG
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
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Application filed by Miele und Cie KG filed Critical Miele und Cie KG
Priority to EP01105712A priority Critical patent/EP1118704B1/en
Publication of EP0935687A1 publication Critical patent/EP0935687A1/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
    • 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 washing machine or a washer-dryer with a drum horizontally or inclined and rotatably mounted in a tub with a casing and two cover surfaces, the casing or one of the cover surfaces being equipped with a removal opening, and the casing being wholly or partly made of sheet metal is manufactured, which is provided with a vault structure directed towards the inside of the drum.
  • Drums of washing machines or washer dryers usually consist of sheet metal structures. Because of the high spin speeds of up to 1600 rpm, great demands are placed on the drum construction in terms of strength, shape retention and rigidity. From DE 44 37 986 A1 and DE-OS 25 57 215 it is known to provide the sheet metal from which the drum is made with arch structures to increase its strength.
  • the drum jacket and possibly also the top surfaces with holes so that an exchange of lye between the laundry and the tub is ensured.
  • These holes have diameters in the order of 3.5 mm in today's washing machines.
  • holes with a diameter of approx. 2.5 mm are first punched into a sheet metal coil and then deepened in a funnel shape by an embossing process, the so-called passage, and widened to 3.5 mm.
  • the deepening of the holes is directed outwards.
  • Drums with hole diameters of around 2 mm which do not have to be put through, therefore have a relatively smooth surface, which lacks the optical properties described above.
  • the invention thus presents the problem of designing the drum of a washing machine in such a way that good optical properties and complete emptying of the residual water are achieved at the same time.
  • the advantages which can be achieved with the invention are an increase in the stability of the drum. This can reduce the costs of using thick sheets or complex forming processes (e.g. expanding).
  • the safety distance between the drum and the tub which is intended to prevent the drum and tub from touching during spinning, can be reduced while maintaining the sheet thickness. This reduces the so-called dead volume between the drum and tub shell, i.e. H. the free fleet is reduced (lower water and energy consumption) and the drum volume can be increased.
  • the holes are arranged in sections of the jacket which have no arched structure. With such a drum, the perforation is easier to carry out since it does not have to be adapted to the arch structure.
  • the holes can be arranged in the edge regions adjoining the cover surfaces (cap, base) or in the central region of the jacket.
  • the arch structure consists of polygons directed towards the inside of the drum and the holes are in the corner points of the edge contours arranged. This results in a pattern for the arch structure that is relatively easy to produce and, moreover, the holes are located at the deepest points, which greatly improves the drainage behavior of the wash liquor or the rinsing water.
  • the edge contours have a flat area directed in the circumferential direction of the drum casing and if the holes are arranged in this area.
  • shaping and stabilizing contours are embossed into the perforated cylindrical shell by expansion.
  • it is provided with the arch structure by a method known from DE 44 37 986 A1 or DE-OS 25 57 215. With such a method, it is impossible to punch the holes in the already rounded drum jacket provided with the arch structure. It is relatively difficult to arrange the holes punched on the sheet coil and the arch structure created by expanding the jacket so that the holes are exactly at the corner points of the structure.
  • a change in the sequence of the process steps in a process in which the structure is first broken in and then punched is also disadvantageous in terms of production technology, since the arched structures can be damaged by punching the holes.
  • the tolerance range in which the holes are to be arranged is increased, which simplifies the punching in an automatic manufacturing process. This is particularly the case if the width of the flat area is 1.5 to 2.5 times the hole diameter.
  • the holes are smaller in number and / or in diameter than those of conventional drum washing machines. As a result, the passage of fluff or threads is reduced, which protects the laundry more.
  • FIG. 1 shows the general structure of a drum washing machine
  • FIG. 3 shows a further variant of the arch structure and the perforation in an area of the drum casing (3.1).
  • Figure 5 shows a section of a drum (3) with unstructured areas
  • the drum washing machine (1) designed according to the invention has a tub (2) in which a drum (3) for holding laundry (4) is rotatably mounted.
  • the drum (3) is driven by a motor (13) via a V-belt (13.1).
  • the lye Container (2) is suspended on springs (5) so that it can move in the housing (6) and is supported in the lower region by shock absorbers (7) against the housing base (8) in order to dampen these vibrations.
  • the detergent / fabric softener required to carry out a washing program is fed to the tub (2) via a detergent dispensing chamber (9) with a connecting hose (10) connected.
  • the desired substances can be filled by the user into corresponding compartments (11) in a detergent drawer (12).
  • the entire subject content is flushed into the tub (2) at the beginning of the respective program part via a water inlet (not shown in the drawings).
  • a microprocessor control (MC) is provided, which is connected to various measuring sensors and the operating elements via signal lines (14). It transmits time and status-dependent commands to various actuators (motors, valves, display elements %) via control lines (15).
  • the drum (3) is manufactured in an automatic manufacturing process (not shown) described in more detail elsewhere. For this purpose, first a sheet metal strip is cut from a coil for the drum casing (3.1) and punched with the desired perforation (16). The sheet metal strip is then bent in a circle and the two mutually facing edges are welded. The cylinder thus created is provided with shaping and stabilizing contours by known expansion processes. Then, by a method known from DE-OS 25 57 215
  • Figure 3 shows a section of the drum shell (3.1) with the basic structure of the arch structure and the arrangement of the holes (16) according to the invention:
  • the jacket (3.1) is provided in its entirety or in sections with inwardly curved polygons, preferably hexagons (17).
  • Figure 3a shows a section through the jacket (3.1) along the line A - A, from which the curvature of the hexagons (17) in the direction of the drum axis (3.4) is clear. Versions are also possible in which the top surfaces (cap (3.2) and bottom (3.3)) are provided with curved polygons.
  • Holes (16) are provided in the drum jacket (3.1) in a smaller number than in the case of drums (3) customary today and, if possible, with a smaller diameter d (approximately 2 mm).
  • holes (16) are arranged in the outward-facing edge contours (17.1) of the curvature and here in particular in the corner points of the hexagons.
  • the arrangement of the holes (16) is determined by the requirement for rapid, residue-free water drainage and a good degree of textile dewatering when spinning with pumps or only pumping, optimal laundry protection, low sensitivity to foreign bodies and good optics.
  • Figure 4 shows a section of a drum casing (3.1) with an advantageous embodiment of the arch structure in the form of hexagons (18) with curved edges, in which the edge contours have a flat area (19) of 1.5 from the circumferential direction of the drum casing (3.1) -fold up to 2.5 times the hole diameter (d) and the holes (16) are arranged in this area (19).
  • the areas (19) are 4 mm wide and the hole diameter d is 2 mm.
  • the width across flats s of the structural samples is approximately one fifth of the jacket width, here 38.48 mm.
  • Rows of holes are arranged on the front and rear edges (3.5) of the drum shell (3.1), which are not curved.
  • unstructured zones (3.6) with holes (16) are possible, for example as shown in FIG. 5, in the middle of the drum shell (3.1).
  • the domed areas can be completely unperforated, so that the structure only serves to secure the drum (3), but it can also the perforation (16) described above in the preferred places within the domed structure, for. B. the corner points (20) of the polygons (17).
  • the diameter of the drum (3) can be increased by up to 10 mm in all of the above-described embodiments with a corresponding material thickness and constant tub size, provided that this does not conflict with the formation of a water jacket when spinning.
  • the smallest distance between the drum jacket (3.1) and the tub container can only be approx. 5 mm.
  • Drum shells (3.1) can be provided with the arched structure as cylinders and subjected to a further shaping process (e.g. expanding) before or after. It is also possible to process finished blanks or coil material provided with arch structures (see DE 44 37 986 A1) or to provide blank or coil material with the arch structures in a continuous manufacturing process, to punch before or after, and to further form processes (e.g. roll forming, embossing , Presses, etc.) and to form a cylinder.
  • a further shaping process e.g. expanding

Abstract

The invention relates to a washing machine or a clothes dryer comprising a horizontally placed or slanted rotating cylinder (3) in a washing container (2) with a sleeve (3.1) and two covering surfaces (3.2, 3.3). The sleeve (3.1) or one of the two covering surfaces (3.2, 3.3) is provided with an opening for removal. The sleeve (3.1) is made entirely or partially out of sheet metal with a domed structure directed towards the inside of the cylinder. In order to protect laundry as much as possible while preserving optical features and ensuring that residual water is fully emptied, the perforations (16) in the sleeve (3.1) are located on the outer edges (16.1) of the dome which are directed towards the outside of the cylinder. Alternately, the perforations (16)) can be located in sections (3.5; 3.6) of the sleeve (3.1)which are designed without a dome structure.

Description

Beschreibungdescription
TrommelwaschmaschineDrum washing machine
Die Erfindung betrifft eine Waschmaschine oder einen Waschtrockner mit einer in einem Laugenbehälter horizontal oder geneigt und drehbar gelagerten Trommel mit einem Mantel und zwei Deckflächen, wobei der Mantel oder eine der Deckflächen mit einer Entnahmeöffnung ausgestattet ist, und wobei der Mantel ganz oder teilweise aus einem Blech gefertigt ist, welches mit einer zum Trommelinneren gerichteten Wölbstruktur versehenen ist.The invention relates to a washing machine or a washer-dryer with a drum horizontally or inclined and rotatably mounted in a tub with a casing and two cover surfaces, the casing or one of the cover surfaces being equipped with a removal opening, and the casing being wholly or partly made of sheet metal is manufactured, which is provided with a vault structure directed towards the inside of the drum.
Trommeln von Waschautomaten oder Waschtrocknern bestehen in der Regel aus Blechkonstruktionen. Wegen der hohen Schleuderdrehzahlen bis zu 1600 Upm werden an die Trom- melkonstruktion große Anforderungen bezüglich Festigkeit, Formhaltigkeit und Steif igkeit gestellt. Aus der DE 44 37 986 A1 und aus der DE-OS 25 57 215 ist es bekannt, das Blech, aus dem die Trommel gefertigt wird, zur Erhöhung seiner Festigkeit mit Wölbstrukturen zu versehen.Drums of washing machines or washer dryers usually consist of sheet metal structures. Because of the high spin speeds of up to 1600 rpm, great demands are placed on the drum construction in terms of strength, shape retention and rigidity. From DE 44 37 986 A1 and DE-OS 25 57 215 it is known to provide the sheet metal from which the drum is made with arch structures to increase its strength.
Bei Waschmaschinen ist es weiterhin üblich, den Trommelmantel und evtl. auch die Deckflä- chen mit Löchern zu versehen, damit ein Laugenaustausch zwischen Wäsche und Laugenbehälter gewährleistet ist. Diese Löcher besitzen bei heute üblichen Waschmaschinen Durchmesser in der Größenordnung von 3,5 mm. Dabei werden im Fertigungsprozeß der Trommel zunächst Löcher mit einem Durchmesser von ca. 2,5 mm in ein Blechcoil eingestanzt und anschließend durch einen Prägevorgang, das sogenannte Durchstellen, trichterförmig vertieft und auf 3,5 mm geweitet. Beim Formen und Verschweißen eines zugeschnittenen Coilteils zu einem zylindrischen Mantel wird die Vertiefung der Löcher nach außen gerichtet. Dies geschieht zu dem Zweck, daß am Lochrand evtl. vorhandene Grate nicht ins Trommelinnere ragen und so der Kontakt der Wäsche zu diesen Graten vermieden wird. Das Durchstellen und die damit verbundene Strukturierung der Trommelinnenseite ergibt den Effekt, daß einerseits der Anteil der ebenen Oberfläche an der gesamten Mantelfläche verringert und andererseits das in die Trommel einfallende Licht diffus gespiegelt wird. Hierdurch wird zum einen der Eindruck von Solidität und Glanz, also hochwertigem Material vermittelt, außerdem fallen Kratzer oder Verunreinigungen weniger auf.In washing machines, it is also common to provide the drum jacket and possibly also the top surfaces with holes so that an exchange of lye between the laundry and the tub is ensured. These holes have diameters in the order of 3.5 mm in today's washing machines. In the manufacturing process of the drum, holes with a diameter of approx. 2.5 mm are first punched into a sheet metal coil and then deepened in a funnel shape by an embossing process, the so-called passage, and widened to 3.5 mm. When forming and welding a cut coil part into a cylindrical jacket, the deepening of the holes is directed outwards. This is done for the purpose that any burrs that may be present on the edge of the hole do not protrude into the interior of the drum and thus the contact of the laundry with these burrs is avoided. The setting through and the associated structuring of the inside of the drum results in the effect that, on the one hand, the proportion of the flat surface in the entire lateral surface is reduced and, on the other hand, the light entering the drum is reflected diffusely. On the one hand, this gives the impression of solidity and shine, i.e. high-quality material, and scratches or contamination are less noticeable.
Bei den vorgenannten Trommeln hat es sich als nachteilig erwiesen, daß die relativ großen Löcher bei Textilien zur Noppenbildung, zu Wäscheschäden und zum Durchtritt von Fäden und Fremdkörpern führen. Es wurde deshalb bereits vorgeschlagen, den Lochdurchmesser zu verringern (DE-OS 14 10 985) und/oder die Lochung auf Teilbereiche des Mantels zu begrenzen (DE 28 26 506 A1). Will man durchgestellte Löcher mit einem Durchmesser von 2 mm erreichen, so dürfen die Stanzwerkzeuge eine maximale Stärke von ca. 1 ,2 mm aufweisen. Dies würde bei den für Waschmaschinentrommeln verwendeten Blechstärken schnell zum Abbrechen der Werkzeuge führen. Aus diesem Grund ist es in einem automatisierten Fertigungsprozeß nicht möglich, Waschmaschinentrommeln mit durchgestellten Löchern von 2 mm Durchmesser zu erzeugen.In the case of the aforementioned drums, it has proven to be disadvantageous that the relatively large holes in textiles lead to pimples, to laundry damage and to the passage of threads and foreign bodies. It has therefore already been proposed to reduce the hole diameter (DE-OS 14 10 985) and / or to limit the perforation to partial areas of the jacket (DE 28 26 506 A1). If you want to reach through holes with a diameter of 2 mm, the punching tools may have a maximum thickness of approx. 1.2 mm. With the plate thicknesses used for washing machine drums, this would quickly lead to the tools breaking off. For this reason, it is not possible in an automated manufacturing process to produce washing machine drums with through holes of 2 mm in diameter.
Trommeln mit Lochdurchmessern um 2 mm, bei denen auf das Durchstellen verzichtet wird, besitzen deshalb eine relativ glatte Oberfläche, welcher die zuvor geschilderten optischen Eigenschaften fehlen. Das Gleiche gilt für Trommeln mit einer Lochung in Teilbereichen, da hier die ungelochten Mantelbereiche vollkommen glatt sind. Außerdem ist es bei solchen Trommeln nachteilig, daß auf der glatten Oberfläche Restwasser stehenbleibt und die Entwässerung verschlechtert.Drums with hole diameters of around 2 mm, which do not have to be put through, therefore have a relatively smooth surface, which lacks the optical properties described above. The same applies to drums with perforations in partial areas, since the unperforated jacket areas are completely smooth. In addition, with such drums it is disadvantageous that residual water remains on the smooth surface and the drainage deteriorates.
Der Erfindung stellt sich somit das Problem, die Trommel einer Waschmaschine derart zu gestalten, daß gleichzeitig gute optische Eigenschaften und eine vollständige Entleerung des Restwassers erreicht werden.The invention thus presents the problem of designing the drum of a washing machine in such a way that good optical properties and complete emptying of the residual water are achieved at the same time.
Erfindungsgemäß wird dieses Problem durch Trommelwaschmaschinen mit den Merkmalen der unabhängigen Patentansprüche 1 und 2 gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den nachfolgenden abhängigen Ansprüchen.According to the invention, this problem is solved by drum washing machines with the features of independent claims 1 and 2. Advantageous refinements and developments of the invention result from the following dependent claims.
Die mit der Erfindung erreichbaren Vorteile bestehen neben der Lösung des vorgenannten Problems in einer Erhöhung der Stabilität der Trommel. Hierdurch können die Kosten, die beim Einsatz dicker Bleche oder aufwendiger Umformprozesse (z. B. Expandieren) entstehen, verringert werden. Alternativ dazu kann bei Beibehaltung der Blechstärken der Sicherheitabstand zwischen Trommel und Laugenbehälter, der beim Schleudern die Berührung von Trommel und Laugenbehälter verhindern soll, verringert werden. Hierdurch reduziert sich das sogenannte Totvolumen zwischen Trommel- und Laugenbehältermantel, d. h. die freie Flotte wird reduziert (geringerer Wasser- und Energieverbrauch) und das Trommelvolumen kann vergrößert werden.In addition to solving the aforementioned problem, the advantages which can be achieved with the invention are an increase in the stability of the drum. This can reduce the costs of using thick sheets or complex forming processes (e.g. expanding). As an alternative to this, the safety distance between the drum and the tub, which is intended to prevent the drum and tub from touching during spinning, can be reduced while maintaining the sheet thickness. This reduces the so-called dead volume between the drum and tub shell, i.e. H. the free fleet is reduced (lower water and energy consumption) and the drum volume can be increased.
Bei einer anderen erfindungsgemäßen Ausgestaltung der Trommelwaschmaschine nach dem Oberbegriff des Anspruchs 1 sind die Löcher in ohne Wölbstruktur ausgebildeten Abschnitten des Mantels angeordnet. Bei einer solche Trommel ist die Lochung einfacher auszuführen, da sie nicht der Wölbstruktur angepaßt werden muß. Die Löcher können in den an die Deckflächen (Kappe, Boden) angrenzenden Randbereichen oder im Mittelbereich des Mantels angeordnet sein.In another embodiment of the drum-type washing machine according to the invention, the holes are arranged in sections of the jacket which have no arched structure. With such a drum, the perforation is easier to carry out since it does not have to be adapted to the arch structure. The holes can be arranged in the edge regions adjoining the cover surfaces (cap, base) or in the central region of the jacket.
In einer vorteilhaften Ausführungsform der Erfindung besteht die Wölbstruktur aus zum Trommelinneren gerichteten Vielecken und die Löcher sind in den Eckpunkten der Randkonturen angeordnet. Hierdurch ergibt sich ein relativ einfach herzustellendes Muster für die Wölbstruktur und außerdem befinden sich die Löcher jeweils an den tiefsten Punkten, wodurch das Ablaufverhalten der Waschlauge bzw. des Spülwassers sehr stark verbessert wird.In an advantageous embodiment of the invention, the arch structure consists of polygons directed towards the inside of the drum and the holes are in the corner points of the edge contours arranged. This results in a pattern for the arch structure that is relatively easy to produce and, moreover, the holes are located at the deepest points, which greatly improves the drainage behavior of the wash liquor or the rinsing water.
Es ist weiterhin vorteilhaft, wenn die Randkonturen einen flachen, in Umfangsrichtung des Trommelmantels gerichteten Bereich aufweisen und wenn die Löcher in diesem Bereich angeordnet sind. In dem an anderer Stelle (S.1 , 2. 14-21) beschriebenen Fertigungsprozeß werden in den gelochten zylindrische Mantel durch Expandieren formgebende und stabilisierende Konturen eingeprägt. Anschließend wird er durch ein aus der DE 44 37 986 A1 oder der DE- OS 25 57 215 bekanntes Verfahren mit der Wölbstruktur versehen. Bei einem solchen Verfah- ren ist es unmöglich, die Löcher in den bereits gerundeten, mit der Wölbstruktur versehenen Trommelmantel zu stanzen. Es ist relativ schwierig, die am Blechcoil eingestanzte Lochung und die durch Expandieren des Mantels erzeugte Wölbstruktur so übereinander anzuordnen, daß die Löcher sich exakt an den Eckpunkten der Struktur befinden. Eine Änderung der Abfolge der Verfahrensschritte in einen Prozeß, bei dem zunächst die Struktur eingebrach und anschließend gelocht wird, ist ebenfalls fertigungstechnisch ungünstig, da die Wölbstrukturen durch das Stanzen der Löcher beschädigt werden können. Durch das Verbreitern der Randkonturen vergrößert sich der Toleranzbereich, in dem die Löcher angeordnet werden sollen, wodurch die Lochung in einem automatischen Fertigungsprozeß vereinfacht wird. Dies ist insbesondere der Fall, wenn die Breite des flachen Bereichs, das 1 ,5-fache bis 2,5-fache des Lochdurchmessers aufweist.It is also advantageous if the edge contours have a flat area directed in the circumferential direction of the drum casing and if the holes are arranged in this area. In the manufacturing process described elsewhere (p.1, 2. 14-21), shaping and stabilizing contours are embossed into the perforated cylindrical shell by expansion. Then it is provided with the arch structure by a method known from DE 44 37 986 A1 or DE-OS 25 57 215. With such a method, it is impossible to punch the holes in the already rounded drum jacket provided with the arch structure. It is relatively difficult to arrange the holes punched on the sheet coil and the arch structure created by expanding the jacket so that the holes are exactly at the corner points of the structure. A change in the sequence of the process steps in a process in which the structure is first broken in and then punched is also disadvantageous in terms of production technology, since the arched structures can be damaged by punching the holes. By widening the edge contours, the tolerance range in which the holes are to be arranged is increased, which simplifies the punching in an automatic manufacturing process. This is particularly the case if the width of the flat area is 1.5 to 2.5 times the hole diameter.
Es ist weiterhin vorteilhaft, wenn die Löcher gegenüber denen herkömmlicher Trommelwaschmaschinen in der Anzahl und/oder im Durchmesser verringert sind. Hierdurch wird der Durchtritt von Flusen oder Fäden vermindert, wodurch die Wäsche stärker geschont wird.It is also advantageous if the holes are smaller in number and / or in diameter than those of conventional drum washing machines. As a result, the passage of fluff or threads is reduced, which protects the laundry more.
Ausführungsbeispiele der Erfindung sind in den Zeichnungen rein schematisch dargestellt und werden nachfolgend näher beschrieben. Es zeigtExemplary embodiments of the invention are shown purely schematically in the drawings and are described in more detail below. It shows
Figur 1 den allgemeinen Aufbau einer TrommelwaschmaschineFigure 1 shows the general structure of a drum washing machine
Figur 2 den Längsschnitt durch eine Trommel (3)2 shows the longitudinal section through a drum (3)
Figur 3, 3a schematisch die Gestaltung der Wölbstruktur und der Lochung in einem Bereich des Trommelmantels (3.1) Figur 4 eine weitere Variante der Wölbstruktur und der Lochung in einem Bereich des3, 3a schematically the design of the arch structure and the perforation in an area of the drum casing (3.1). FIG. 4 shows a further variant of the arch structure and the perforation in an area of the
Trommelmantels (3.1) Figur 5 einen Ausschnitt aus einer Trommel (3) mit unstrukturierten BereichenDrum casing (3.1) Figure 5 shows a section of a drum (3) with unstructured areas
Die erfindungsgemäß ausgebildete Trommelwaschmaschine (1) besitzt einen Laugenbehälter (2), in dem eine Trommel (3) zur Aufnahme von Wäsche (4) drehbar gelagert ist. Der An- trieb der Trommel (3) erfolgt durch einen Motor (13) über einen Keilriemen (13.1). Der Laugen- behälter (2) ist an Federn (5) schwingbeweglich im Gehäuse (6) aufgehängt und wird zur Dämpfung dieser Schwingungen im unteren Bereich durch Stoßdämpfer (7) gegenüber dem Gehäuseboden (8) abgestützt.The drum washing machine (1) designed according to the invention has a tub (2) in which a drum (3) for holding laundry (4) is rotatably mounted. The drum (3) is driven by a motor (13) via a V-belt (13.1). The lye Container (2) is suspended on springs (5) so that it can move in the housing (6) and is supported in the lower region by shock absorbers (7) against the housing base (8) in order to dampen these vibrations.
Die zur Durchführung eines Waschprogramms benötigten Wasch-/Weichspülmittel werden dem Laugenbehälter (2) über eine Waschmitteleinspülkammer (9) mit angeschlossenem Verbindungsschlauch (10) zugeführt. Hierzu können die gewünschten Substanzen vom Benutzer in entsprechende Fächer (11) einer Waschmittelschublade (12) eingefüllt werden. Über einen in den Zeichnungen nicht dargestellten Wasserzulauf wird der gesamte Fachinhalt zu Beginn des jeweiligen Programmteils in den Laugenbehälter (2) eingespült.The detergent / fabric softener required to carry out a washing program is fed to the tub (2) via a detergent dispensing chamber (9) with a connecting hose (10) connected. For this purpose, the desired substances can be filled by the user into corresponding compartments (11) in a detergent drawer (12). The entire subject content is flushed into the tub (2) at the beginning of the respective program part via a water inlet (not shown in the drawings).
Zur Steuerung der verschiedenen Waschprogramme ist eine Mikroprozessor-Steuerung (MC) vorgesehen, die über Signalleitungen (14) mit verschiedenen Meßgebern und den Bedienelementen verbunden ist. Sie gibt zeit- und zustandsabhängige Befehle über Steuerleitungen (15) an verschiedene Aktoren (Motoren, Ventile, Anzeigeelemente ...) weiter.To control the various washing programs, a microprocessor control (MC) is provided, which is connected to various measuring sensors and the operating elements via signal lines (14). It transmits time and status-dependent commands to various actuators (motors, valves, display elements ...) via control lines (15).
Die Trommel (3) wird in einem an anderer Stelle genauer beschriebenen automatischen Ferti- gungsverfahren (nicht dargestellt) hergestellt. Hierzu wird zunächst für den Trommelmantel (3.1) ein Blechstreifen von einem Coil abgeschnitten und durch Stanzen mit der gewünschten Lochung (16) versehen. Anschließend wird der Blechstreifen kreisförmig gebogen und die beiden zueinander weisenden Kanten verschweißt. Der so entstandene Zylinder wird durch bekannte Expandierverfahren mit formgebenden und stabilisierenden Konturen verse- hen. Anschließend wird durch ein aus der DE-OS 25 57 215 bekanntes Verfahren eineThe drum (3) is manufactured in an automatic manufacturing process (not shown) described in more detail elsewhere. For this purpose, first a sheet metal strip is cut from a coil for the drum casing (3.1) and punched with the desired perforation (16). The sheet metal strip is then bent in a circle and the two mutually facing edges are welded. The cylinder thus created is provided with shaping and stabilizing contours by known expansion processes. Then, by a method known from DE-OS 25 57 215
Wölbstruktur auf den Mantel gebracht. Danach erfolgt die Montage des Bodens (3.2) und der Kappe (3.3).Vaulted structure on the coat. Then the base (3.2) and the cap (3.3) are installed.
Figur 3 zeigt einen Ausschnitt aus dem Trommelmantel (3.1) mit dem prinzipiellen Aufbau der Wölbstruktur und der erfindungsgemäßen Anordnung der Löcher (16):Figure 3 shows a section of the drum shell (3.1) with the basic structure of the arch structure and the arrangement of the holes (16) according to the invention:
Der Mantel (3.1) ist komplett oder in Abschnitten mit nach innen gewölbten Vielecken, vorzugsweise Sechsecken (17), versehen. Figur 3a zeigt einen Schnitt durch den Mantel (3.1) entlang der Linie A - A, aus dem die Wölbung der Sechsecke (17) in Richtung der Trommelachse (3.4) deutlich wird. Es sind auch Ausführungen möglich, bei denen die Deckflächen (Kappe (3.2) und Boden (3.3)), mit gewölbten Vielecken versehen sind. Im Trommelman- tel (3.1) sind Löcher (16) in einer geringeren Zahl als bei heute üblichen Trommeln (3) und möglichst mit geringerem Durchmesser d (ca. 2 mm) vorgesehen. Diese Löcher (16) sind in den nach außen gerichteten Randkonturen (17.1) der Wölbung und hier insbesondere in den Eckpunkten der Sechsecke angeordnet. Die Anordnung der Löcher (16) wird bestimmt durch die Forderung nach raschem, rückstandsfreien Wasserablauf und gutem Textilentwässerungsgrad beim Schleudern mit Pumpen oder ausschließlichem Abpumpen, einer optimalen Wäscheschonung, geringer Fremdkörperempfindlichkeit und einer guten Optik.The jacket (3.1) is provided in its entirety or in sections with inwardly curved polygons, preferably hexagons (17). Figure 3a shows a section through the jacket (3.1) along the line A - A, from which the curvature of the hexagons (17) in the direction of the drum axis (3.4) is clear. Versions are also possible in which the top surfaces (cap (3.2) and bottom (3.3)) are provided with curved polygons. Holes (16) are provided in the drum jacket (3.1) in a smaller number than in the case of drums (3) customary today and, if possible, with a smaller diameter d (approximately 2 mm). These holes (16) are arranged in the outward-facing edge contours (17.1) of the curvature and here in particular in the corner points of the hexagons. The arrangement of the holes (16) is determined by the requirement for rapid, residue-free water drainage and a good degree of textile dewatering when spinning with pumps or only pumping, optimal laundry protection, low sensitivity to foreign bodies and good optics.
Figur 4 zeigt einen Ausschnitt aus einem Trommelmantel (3.1) mit einer vorteilhaften Ausführungsform der Wölbstrukturin Form von Sechsecken (18) mit geschwungenen Rändern, bei der die Randkonturen einen flachen, in Umfangsrichtung des Trommelmantels (3.1) gerichteten Bereich (19) vom 1,5-fachen bis 2,5-fachen des Lochdurchmessers (d) aufweisen und die Löcher (16) in diesem Bereich (19) angeordnet sind. Im dargestellten Ausführungsbeispiel sind die Bereiche (19) 4 mm breit und der Lochdurchmesser d beträgt 2 mm. Die Schlüsselweite s der Strukturmuster beträgt etwa ein Fünftel der Mantelbreite, hier 38,48 mm. Die Vorteile einer solchen Ausführungsform sind an anderer Stelle beschrieben.Figure 4 shows a section of a drum casing (3.1) with an advantageous embodiment of the arch structure in the form of hexagons (18) with curved edges, in which the edge contours have a flat area (19) of 1.5 from the circumferential direction of the drum casing (3.1) -fold up to 2.5 times the hole diameter (d) and the holes (16) are arranged in this area (19). In the illustrated embodiment, the areas (19) are 4 mm wide and the hole diameter d is 2 mm. The width across flats s of the structural samples is approximately one fifth of the jacket width, here 38.48 mm. The advantages of such an embodiment are described elsewhere.
Neben Trommeln (3) mit Löchern (16) in den wölbstrukturierten Bereichen ist folgende, in Figur 5 dargestellte Variante denkbar:In addition to drums (3) with holes (16) in the domed areas, the following variant shown in FIG. 5 is also conceivable:
Lochreihen sind an den vorderen und hinteren Rändern (3.5) des Trommelmantels (3.1), die nicht gewölbt sind, angeordnet. Zusätzlich oder alternativ dazu sind weitere begrenzte, unstrukturierte Zonen (3.6) mit Löchern (16) möglich, beispielsweise wie in Figur 5 dargestellt, in der Mitte des Trommelmantels (3.1). Dabei können die wölbstrukturierten Bereiche vollkommen ungelocht sein, so daß die Struktur nur zur Festigung der Trommel (3) dient, es kann aber auch die weiter oben beschriebene Lochung (16) in den bevorzugten Stellen innerhalb der Wölbstruktur, z. B. den Eckpunkten (20) der Vielecke (17), vorgenommen werden.Rows of holes are arranged on the front and rear edges (3.5) of the drum shell (3.1), which are not curved. In addition or as an alternative to this, further limited, unstructured zones (3.6) with holes (16) are possible, for example as shown in FIG. 5, in the middle of the drum shell (3.1). The domed areas can be completely unperforated, so that the structure only serves to secure the drum (3), but it can also the perforation (16) described above in the preferred places within the domed structure, for. B. the corner points (20) of the polygons (17).
Der Durchmesser der Trommel (3) kann bei allen vorbeschriebenen Ausführungsformen bei entsprechender Materialstärke und gleichbleibendem Laugenbehälterdurchmesser um bis zu 10 mm vergrößert werden, sofern dem nicht eine Wassermantelbildung beim Schleudern entgegensteht. Hierdurch kann der geringste Abstand zwischen Trommelmantel (3.1) und Laugenbehältermantel nur ca. 5 mm betragen.The diameter of the drum (3) can be increased by up to 10 mm in all of the above-described embodiments with a corresponding material thickness and constant tub size, provided that this does not conflict with the formation of a water jacket when spinning. As a result, the smallest distance between the drum jacket (3.1) and the tub container can only be approx. 5 mm.
Es können Trommelmäntel (3.1) als Zylinder mit der Wölbstruktur versehen werden und vorher oder nachher einem weiteren Umformprozeß (z. B. Expandieren) unterworfen werden. Genauso ist es möglich, mit Wölbstrukturen versehene fertige Platinen oder Coilmaterial (s. DE 44 37 986 A1) zu verarbeiten oder Platinen oder Coilmaterial in einem kontinuierlichen Fertigungsprozeß mit den Wölbstrukturen zu versehen, vorher oder nachher zu lochen und weiteren Umformprozessen (z. b. Rollforming, Prägen, Pressen usw.) zu unterziehen, sowie zu einem Zylinder zu formen.Drum shells (3.1) can be provided with the arched structure as cylinders and subjected to a further shaping process (e.g. expanding) before or after. It is also possible to process finished blanks or coil material provided with arch structures (see DE 44 37 986 A1) or to provide blank or coil material with the arch structures in a continuous manufacturing process, to punch before or after, and to further form processes (e.g. roll forming, embossing , Presses, etc.) and to form a cylinder.
Die Überlegungen können sinngemäß auch auf den Boden und die Kappe übertragen werden. The considerations can also be applied analogously to the bottom and the cap.

Claims

Patentansprüche claims
1. Waschmaschine oder Waschtrockner mit einer in einem Laugenbehälter (2) horizontal oder geneigt und drehbar gelagerten Trommel (3) mit einem Mantel (3.1) und zwei Deckflächen (3.2, 3.3), wobei der Mantel (3.1) oder eine der Deckflächen (3.2, 3.3) mit einer Entnah- meöffnung ausgestattet ist, und wobei der Mantel mindestens teilweise aus einem Blech gefertigt ist, welches mindestens teilweise mit einer zum Trommelinneren gerichteten Wölbstruktur versehenen ist, dadurch gekennzeichnet, daß Löcher (16) im Mantel (3.1) auf den zum Trommeläußeren gerichteten Randkontu- ren (17.1; 19) der Wölbung angeordnet sind.1. washing machine or washer-dryer with a drum (3) mounted horizontally or inclined and rotatable in a tub (2) and rotatable with a jacket (3.1) and two cover surfaces (3.2, 3.3), the jacket (3.1) or one of the cover surfaces (3.2 , 3.3) is equipped with a removal opening, and wherein the casing is at least partially made of a sheet metal which is at least partially provided with a domed structure directed towards the inside of the drum, characterized in that holes (16) in the casing (3.1) on the edge contours (17.1; 19) of the curvature facing the drum exterior are arranged.
2. Trommelwaschmaschine (1) nach dem Oberbegriff des Anspruchsl, dadurch gekennzeichnet, daß die Löcher (16) in ohne Wölbstruktur ausgebildeten Abschnitten (3.5; 3.6) des Mantels (3.1) angeordnet sind.2. Drum washing machine (1) according to the preamble of claim 1, characterized in that the holes (16) are arranged in sections (3.5; 3.6) of the jacket (3.1) which have no arch structure.
3. Trommelwaschmaschine (1) nach Anspruch 2, dadurch gekennzeichnet, daß die Löcher (16) in mindestens einem an die Deckfläche angrenzenden ungewölbten Abschnitt (3.5) des Mantels (3.1) angeordnet sind.3. drum washing machine (1) according to claim 2, characterized in that the holes (16) in at least one adjacent to the top surface non-curved portion (3.5) of the jacket (3.1) are arranged.
4. Trommelwaschmaschine (1) nach einem der Ansprüche 2 oder 3, dadurch gekennzeichnet, daß die Löcher (16) in einem ungewölbten Mittelbereich (3.6) des Mantels (3.1) angeordnet sind.4. drum washing machine (1) according to one of claims 2 or 3, characterized in that the holes (16) are arranged in a non-arched central region (3.6) of the jacket (3.1).
5. Trommelwaschmaschine (1) nach mindestens einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Wölbstruktur aus zum Trommelinneren gerichteten Vielecken (16) besteht und daß die Löcher (16) in den Eckpunkten der Randkonturen angeordnet sind.5. drum washing machine (1) according to at least one of claims 1 to 4, characterized in that the arch structure consists of polygons (16) directed towards the inside of the drum and that the holes (16) are arranged in the corner points of the edge contours.
6. Trommelwaschmaschine (1) nach Anspruch 5, dadurch gekennzeichnet, daß die Randkonturen einen flachen, in Umfangsrichtung des Trommelmantels (3.1) gerichte- ten Bereich (19) aufweisen und daß die Löcher (16) in diesen Bereichen (19) angeordnet sind. 6. drum washing machine (1) according to claim 5, characterized in that the edge contours have a flat, in the circumferential direction of the drum shell (3.1) directed area (19) and that the holes (16) are arranged in these areas (19).
7. Trommelwaschmaschine (1) nach Anspruch 6, dadurch gekennzeichnet, daß die Breite der Bereiche (19) das 1 ,5-fache bis 2,5-fache des Lochdurchmessers (d) beträgt.7. drum washing machine (1) according to claim 6, characterized in that the width of the areas (19) is 1, 5 times to 2.5 times the hole diameter (d).
8. Trommelwaschmaschine (1) nach mindestens einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Löcher (16) gegenüber denen herkömmlicher Trommelwaschmaschinen (1) im Durchmesser (d) verringert sind.8. drum washing machine (1) according to at least one of claims 1 to 7, characterized in that the holes (16) compared to those of conventional drum washing machines (1) in diameter (d) are reduced.
9. Trommelwaschmaschine (1) nach Anspruch 8, dadurch gekennzeichnet, daß die Löcher (16) einen Durchmesser (d) von ca. 2 mm besitzen.9. drum washing machine (1) according to claim 8, characterized in that the holes (16) have a diameter (d) of about 2 mm.
10. Trommelwaschmaschine (1) nach mindestens einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Löcher (16) gegenüber denen herkömmlicher Trommelwaschmaschinen (1) in der Anzahl verringert sind.10. drum washing machine (1) according to at least one of claims 1 to 9, characterized in that the holes (16) compared to those of conventional drum washing machines (1) are reduced in number.
11. Trommelwaschmaschine (1) nach mindestens einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß der Abstand zwischen Trommelmantel (3.1) und Laugenbehältermantel gegenüber dem von herkömmlichen Trommelwaschmaschinen (1) um bis zu 5 mm verringert ist.11. drum washing machine (1) according to at least one of claims 1 to 10, characterized in that the distance between the drum jacket (3.1) and tub container is reduced compared to that of conventional drum washing machines (1) by up to 5 mm.
12. Trommelwaschmaschine (1) nach Anspruch 11 , dadurch gekennzeichnet, daß der geringste Abstand zwischen Trommelmantel (3.1) und Laugenbehältermantel ca. 5 mm beträgt. 12. drum washing machine (1) according to claim 11, characterized in that the smallest distance between the drum jacket (3.1) and tub container is about 5 mm.
EP97950062A 1996-11-02 1997-10-31 Cylinder washing machine Expired - Lifetime EP0935687B1 (en)

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DE19645273 1996-11-02
DE19645273 1996-11-02
PCT/EP1997/006033 WO1998020195A1 (en) 1996-11-02 1997-10-31 Cylinder washing machine

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WO2019185809A1 (en) 2018-03-28 2019-10-03 Meiko Maschinenbau Gmbh & Co. Kg Method and devices for cleaning at least one breathing apparatus
WO2021110897A1 (en) 2019-12-06 2021-06-10 Meiko Maschinenbau Gmbh & Co. Kg Cleaning items to be cleaned, which have at least one cavity, in a conveyor washer

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DE59710390D1 (en) 2003-08-07
WO1998020195A1 (en) 1998-05-14
EP0935687B1 (en) 2001-06-13
EP1118704A1 (en) 2001-07-25
ES2159887T3 (en) 2001-10-16
KR20000036196A (en) 2000-06-26
EP1118704B1 (en) 2003-07-02
KR100393318B1 (en) 2003-08-02
DE59703826D1 (en) 2001-07-19
ES2195963T3 (en) 2003-12-16
US6334341B1 (en) 2002-01-01
JP2001504006A (en) 2001-03-27

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