EP2177656B1 - Drum for a laundry dryer - Google Patents
Drum for a laundry dryer Download PDFInfo
- Publication number
- EP2177656B1 EP2177656B1 EP08018120A EP08018120A EP2177656B1 EP 2177656 B1 EP2177656 B1 EP 2177656B1 EP 08018120 A EP08018120 A EP 08018120A EP 08018120 A EP08018120 A EP 08018120A EP 2177656 B1 EP2177656 B1 EP 2177656B1
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- EP
- European Patent Office
- Prior art keywords
- drum
- segments
- approximately
- casing
- length
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- 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.)
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
- D06F58/04—Details
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- 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
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- 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
- D06F37/06—Ribs, lifters, or rubbing means forming part of the receptacle
Definitions
- the invention relates to a drum for a tumble dryer, in which the drum can be rotatably mounted on a horizontal or inclined axis, comprising a cylindrical or frusto-conical shell, which comprises on its surface a structure consisting of individual curved segments.
- the drum For drying wet or damp laundry items, there are known dryers with a rotatable drum, through which a heated air stream flows in order to dry the laundry located therein.
- the wet laundry items are swirled around by the drum rotation, so that they are well flowed through by the drying air, whereby the laundry is deprived of moisture.
- the drum usually has driving ribs in order to lift the laundry items in the circumferential direction, wherein they detach in the upper region due to their gravity from the drum shell and impinge on the drum shell down.
- a drum for a tumble dryer which has a structure of outwardly directed, to the drum outer bulges for improved entrainment.
- This additionally protects the laundry items, as they can slide on a bubble, caused by partial Heilverwirbelungen in the area of the bulges, very low friction along.
- the bulges are here uniformly structured, so that the laundry movement is caused in the circumferential direction of the drum. In this case, it may happen that the laundry pieces curl together in a ring, so that there is a rolling movement with less mixing with the drying air.
- the DE 10 2005 026 175 A1 discloses a washing machine drum having ellipsoidal bulges in the shell. However, the bulges are evenly arranged on the lateral surface, so that the structure of the embossments or bulges does not show a curved pattern on the surface.
- a similar drum is from the DE 101 45 079 C1 known.
- the curved segments have a round, or polygonal base.
- the DE 297 05 226 U1 discloses a washing machine drum in which the through-holes are arranged in polygonal embossments for improved removal of washing liquid.
- the DE 41 31 005 A1 discloses a drying drum in which the ribs are formed as curvatures directed towards the interior of the drum.
- the DE 101 45 079 C1 discloses a drying drum whose jacket is made wavy, so that there are circumferential grooves. The structure of the corrugations is carried out uniformly.
- the DE 196 0370 discloses a drum in which the embossing has a circular or polygonal base. In one embodiment, small cambers are arranged in the spaces between the bulges with a large base.
- the invention is therefore based on the object to provide a drum for a tumble dryer with buckles, in which the mixing of the laundry with the drying air is improved in a simple manner.
- the main advantage of the drum according to the invention is that an improved movement of the laundry items within the drum is achieved when arranged approximately horizontally or inclined and with a usual speed for the drying process, for example 20 to 70 rpm is rotated. Furthermore, the conservation of the laundry items is maintained or improved, so that premature wear or damage can be avoided.
- the drum according to the invention in particular the drum casing, comprises a structure of curvatures directed towards the drum outer, which consists of individual curved segments.
- the size of the segments is designed differently such that the structure of the curved segments forms a curved pattern on the jacket. Due to the curved pattern, partially different flows or turbulences of the drying air are caused, as a result of which differently intensive air cushions are formed on the drum shell.
- moving laundry items are moved on or close to the drum shell somewhat in the axial direction or in the direction of an edge of the drum shell, so that the laundry items are moved more strongly within the drum.
- the pattern is S-shaped or S-shaped several times curved.
- force impulses or movement impulses are exerted transversely to the circumferential direction in two opposing directions on the laundry casing resting against the drum casing, so that the laundry items reciprocate in the axial direction when the drum is rotated.
- the directional impulses are also exerted on the items of laundry which impinge on the drum shell during the tumble or slide along it, so that on the whole a seemingly chaotic or chaotic or inhomogeneous movement of the items inside the drum is produced than in the case of a drum with a uniform arch structure.
- the curved segments are formed of polygons which abut each other with their edge contours, wherein the segments have a length and a width of about 1 to 5 cm. This results in a nearly coherent arch structure, which can thereby exert particularly effective movement impulses on the laundry.
- the corners of the polygons, in this example honeycombed 6-corner, can be rounded, so that sharp-edged transitions are avoided.
- the roundings in this embodiment have a radius in the range of 2 to 10 mm.
- the height of the bulges is chosen so that they have about the same height and that the height is about 0.1 to 2 mm.
- the smaller segments are more curved in relation to their area than the larger segments, based on the base area of the respective individual segment.
- a partially different mechanical effect on the laundry is effected, whereby the motion caused by the vault structure movement pulses are enhanced.
- the bulges each have a height which is approximately proportional to the length and width of the surfaces, wherein the height corresponds to about 1/500 to 1/20 of the width or the length of the respective segment. This can be advantageous to avoid exaggerated violent impulses for the laundry and to achieve a gentle laundry treatment.
- the segments In order to provide the segments of different sizes, it is expedient for the segments to have at least approximately the same length in the direction of the circumference of the drum and to have a different width in the transverse direction.
- the size and the arrangement are chosen so that the S-shaped pattern is formed in the circumferential direction of the shell.
- the segments in the direction of the drum circumference each have a different length, so that the curved or S-shaped pattern is correspondingly formed transversely to the circumferential direction of the jacket.
- the undulating pattern includes transverse and longitudinal portions, thereby increasing the inhomogeneity of the structure formed by the segments.
- the circumferentially extending S-shaped pattern starting from the approximate centerline of the shell, has a first vertex toward the first end wall and a second vertex toward the second end wall. This ensures that the wave-shaped structure is apparent at least almost over the entire width of the drum shell.
- the drum shell is divided into at least two sections, wherein in each section in each case an S-shaped pattern or a multiple S-shaped curved pattern of domed segments is arranged.
- each section in each case an S-shaped pattern or a multiple S-shaped curved pattern of domed segments is arranged.
- driving ribs In the areas between the individual sections can be mounted driving ribs, which lift the laundry items as the drum is rotated, so that they peel off again in the upper third and fall down.
- the driver ribs can be kept very flat, preferably in the range of about 1 to 2 cm with a drum diameter of 50 to 65 cm.
- the curved or S-shaped pattern is formed on the jacket such that a curved or S-shaped web results without buckling or arch structure.
- a curved or S-shaped web results without buckling or arch structure.
- an improved guidance of the laundry items along the curved or S-shaped, smooth web is achieved.
- the web has approximately the width corresponding to the length of a segment in the circumferential direction.
- a segment width is kept free of bulges, wherein in the S-shaped embodiment of the web starts approximately in the central region or equatorial region of the shell and ends after his arcuate deflections back in the equatorial region.
- the width of the web varies, wherein the width of the web at the narrowest point in the central region of the drum portion or the drum circumference approximately the length of a segment and at the widest point in the apex region or at the ends of the S-shaped web approximately Length of 1.5 to 2 times a segment corresponds. That is, starting in the equatorial region of the shell of the web is designed to be 1.5 to 2 times wider than in the center region of the web, wherein the center of the web, based on the circumference of the drum shell, is also located in the equatorial region. The arcuate deflections of the web deviate once in the direction of the first end wall and once in the direction of the second end wall of the drum from the equatorial line.
- the web is provided with additional directed to the drum outer and / or drum interior surfaces, wherein the curved surfaces each have a length in the circumferential direction of the shell of about 0.4 to 0.8 times the length of a nearest segment and a width from about 0.4 to 0.8 times the width of a nearest segment.
- Fig. 1 is a purely schematic representation of a dryer 1, shown with a housing 2 and a drum 3 arranged therein.
- the position and direction data relate to the operating position of the dryer 1.
- the drum 3 is rotatably mounted, so that in the drying process, the laundry items 8 are swirled around while the air or heated air 12 flows through the drum 3.
- the housing 2 has a loading opening 5, via which the interior of the drum 3 can be reached.
- the loading opening 5 can be closed by means of a door 4.
- the air flow 12 is generated by means of a blower 5 and blown through the process air duct 7 into the drum 3. With a heater 6 in the process air duct 7, the air 12 is heated.
- a condensation device 11 is furthermore provided, which extracts the moisture from the process air 12 and supplies the condensation liquid to a collecting container 9.
- the fan 5 and the drum 3 is driven in rotation.
- Fig. 2 the drum 3 is shown, which consists of a jacket 19 and two opposite end walls 20, wherein here for better illustration of the inside of the jacket 19, the front end face is removed.
- On the inner side 19 a of the jacket 19 are distributed over the circumference a plurality of driver ribs 21, in this example, three, attached.
- the driver ribs 21 are formed in profile approximately V-shaped.
- the drum shell 19 is here divided into three sections, which are divided by the driver ribs 21. In this case, in each section, a structure of the segments 22 is formed such that a curved pattern, in this example an S-shaped pattern, forms on the jacket 19.
- the pattern is in this case designed such that on the drum shell 19 a curved or S-shaped smooth web 24 extends in the circumferential direction U or which extends within the portion between the driving ribs 21.
- the web 24 is not provided here with bulges or with curved segments 22.
- the web 24 is embedded laterally by the segments 22, so that it does not hit one of the front edges 19b 19c.
- the segments 22 are angular, in this example 6-square executed with their contours 22a (FIG. Fig. 4a ) lie against each other and form a honeycomb arrangement.
- Fig. 3 the jacket 19 is shown as a settlement.
- the jacket 19 is divided in the circumferential direction U into a plurality, in this example three, sections 26, which are provided with the structure of arched, polygonal, here hexagonal segments 22.
- the segments 22 are formed differently in size with respect to their surface, such that a curved, here an S-shaped pattern of the structure results on the surface of the jacket 19.
- a curved or S-shaped web 24 is formed, due to its S-shape, the circumferential center line, here Equatorialline EQ called, crossed or oriented to it.
- the circumferential center line here Equatorialline EQ called
- Fig. 4a is a single section 26 of the shell 19 ( Fig. 2 ) in detail. It can be seen here that all the segments 22 have approximately the same length L, wherein they differ with respect to their width B, such that a curved, here an S-shaped pattern of the structure results, wherein additionally an S-shaped web 24th is formed without segments 22 and without bulges.
- the jacket 19 is shown in the sectional plane AA. It can be seen here that the segments 22 have a curvature 23 towards the interior of the drum or are arched, wherein they are arranged with their edge contours 22a at a distance R from the respectively adjacent segment 22.
- the bulges 23 have approximately the same height h, the height h being approximately 0.1 to 2 mm. It is alternatively possible to vary the height h depending on the size, ie of the length L and / or width B of the segments 22. It can also be seen here that the web 24 has no curvature. The web 24 in this case has a width B of about a segment 22, as it undistorted or as it represents in its length L.
- FIG. 5a an embodiment of the drum 3 is outlined, in which the jacket 19 is provided with a wider S-shaped web 24, as in the example according to FIG Fig. 4a the case is.
- the web 22 is designed differently wide in its course in the circumferential direction U, wherein the width B of the web 24 at the narrowest point in the center region of the drum portion 26 or the drum circumference approximately the length L of a segment 22 and at the widest point in the apex area or at the ends of the S-shaped web 24 approximately the length L of 1.5 to 2 times a segment 22 corresponds.
- the web 22 is provided with additional curved surfaces 27 facing the drum, the curved surfaces 27 each having a circumferential length U of the jacket 19 of about 0.4 to 0.8 times the length L of a nearest segment 22 and a width B of about 0.4 to 0.8 times the width B of a nearest segment 22.
- the curved to the drum outer segments 22 are the curved to the drum outer segments 22, the smooth area of the web 24 and the curved segments 27 can be seen in the web 24.
- the smaller segments 27 arranged on the web 24 may also be arched towards the interior of the drum in order to increase the entrainment effect on the items of laundry 8 (FIG. Fig. 1 ) to reinforce. Furthermore, a combination of outward bulges and inward bulges is possible.
- Fig. 6 does not fall under the present invention and shows an embodiment of the drum shell 19 in a developed view, in which the segments 22 are formed differently such that a curved or S-shaped structure 28 results, which extends along the entire shell circumference. There is no buckle-free web 24 is formed so that only the distortion of the segments forms the curved or S-shaped pattern.
- Fig. 7 shows an embodiment with a buckle-free web 24 in the middle third of the shell 19.
- the S-shape is designed so that a single S or a single swing back and forth over the entire shell circumference extends.
- the already mentioned embodiments according to Fig. 5a and 5b with differently wide web 24 and / or with additional curved surfaces 27 (FIG. Fig. 5 ) in the web 24 can also be carried out so that a single S extends over the entire circumference of the shell.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
- Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
Description
Die Erfindung betrifft eine Trommel für einen Wäschetrockner, in dem die Trommel über eine horizontale oder geneigte Achse drehbar gelagert werden kann, umfassend einen zylinderförmigen oder kegelstumpfförmigen Mantel, der auf seiner Fläche eine Struktur, die aus einzelnen gewölbten Segmenten besteht, umfasst.The invention relates to a drum for a tumble dryer, in which the drum can be rotatably mounted on a horizontal or inclined axis, comprising a cylindrical or frusto-conical shell, which comprises on its surface a structure consisting of individual curved segments.
Zum Trocknen von nassen oder feuchten Wäschestücken sind Trockner mit einer drehbaren Trommel bekannt, die mit einem erhitzten Luftstrom durchströmt wird, um die darin befindliche Wäsche zu trocknen. Hierbei werden die feuchten Wäschestücke durch die Trommeldrehung herumgewirbelt, damit sie von der Trocknungsluft gut durchströmt werden, wodurch den Wäschestücken Feuchtigkeit entzogen wird. Die Trommel besitzt hierzu üblicherweise Mitnehmerrippen, um die Wäschestücke in Umfangsrichtung anzuheben, wobei sie sich im oberen Bereich aufgrund ihrer Schwerkraft vom Trommelmantel ablösen und nach unten auf den Trommelmantel auftreffen. Beim Fall bzw. Herumwirbeln innerhalb der Trommel werden die Wäschestücke am effektivsten mit der Trocknungsluft beaufschlagt.For drying wet or damp laundry items, there are known dryers with a rotatable drum, through which a heated air stream flows in order to dry the laundry located therein. Here, the wet laundry items are swirled around by the drum rotation, so that they are well flowed through by the drying air, whereby the laundry is deprived of moisture. For this purpose, the drum usually has driving ribs in order to lift the laundry items in the circumferential direction, wherein they detach in the upper region due to their gravity from the drum shell and impinge on the drum shell down. When tumbling or tumbling inside the drum, the laundry is most effectively exposed to the drying air.
Aus der
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Der Erfindung liegt deshalb die Aufgabe zu Grunde, eine Trommel für einen Wäschetrockner mit Wölbungen bereitzustellen, bei der auf einfache Weise die Durchmischung der Wäschestücke mit der Trocknungsluft verbessert ist.The invention is therefore based on the object to provide a drum for a tumble dryer with buckles, in which the mixing of the laundry with the drying air is improved in a simple manner.
Die Aufgabe wird durch eine Trommel mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Ausführungen ergeben sich aus den nachfolgenden abhängigen Ansprüchen.The object is achieved by a drum having the features of
Der wesentliche Vorteil der erfindungsgemäßen Trommel ist, dass eine verbesserte Bewegung der Wäschestücke innerhalb der Trommel erreicht wird, wenn diese etwa horizontal oder geneigt angeordnet und mit einer für den Trocknungsvorgang üblichen Drehzahl, beispielsweise 20 bis 70 u/min gedreht wird. Ferner wird die Schonung der Wäschestücke beibehalten bzw. verbessert, so dass vorzeitiger Verschleiß oder Beschädigungen vermieden werden.The main advantage of the drum according to the invention is that an improved movement of the laundry items within the drum is achieved when arranged approximately horizontally or inclined and with a usual speed for the drying process, for example 20 to 70 rpm is rotated. Furthermore, the conservation of the laundry items is maintained or improved, so that premature wear or damage can be avoided.
Die erfindungsgemäße Trommel, insbesondere der Trommelmantel umfasst hierzu eine Struktur aus zum Trommeläußern gerichteten Wölbungen, die aus einzelnen gewölbten Segmenten besteht. Die Größe der Segmente ist derart unterschiedlich ausgebildet, dass die Struktur aus den gewölbten Segmenten auf dem Mantel ein gekrümmtes Muster bildet. Durch das gekrümmte Muster werden partiell unterschiedliche Strömungen bzw. Verwirbelungen der Trocknungsluft verursacht, wodurch unterschiedlich intensive Luftpolster am Trommelmantel entstehen. Dadurch werden am bzw. nah am Trommelmantel entlang gleitende Wäschestücke aufgrund der Krümmung etwas in axialer Richtung bzw. in Richtung zu einem Rand des Trommelmantels bewegt, so dass die Wäschestücke stärker innerhalb der Trommel bewegt werden. Der sogenannte Rolleffekt wird dadurch gemildert, da die Wäschestücke zusätzlich zur Umfangsrichtung nunmehr zusätzlich in axialer Richtung, bezogen auf die betriebsgemäße Einbaulage der Trommel, bewegt und/oder zumindest sporadisch Bewegungsimpulse in axialer Richtung erhalten. Hierbei ist es möglich, die sonst üblichen Mitnehmerrippen kleiner bzw. flacher zu gestalten, da die Wäschebewegung durch die Wölbstruktur im Mantel verstärkt wird. Gegebenenfalls kann auf den Einsatz von Mitnehmerrippen gänzlich verzichtet werden.For this purpose, the drum according to the invention, in particular the drum casing, comprises a structure of curvatures directed towards the drum outer, which consists of individual curved segments. The size of the segments is designed differently such that the structure of the curved segments forms a curved pattern on the jacket. Due to the curved pattern, partially different flows or turbulences of the drying air are caused, as a result of which differently intensive air cushions are formed on the drum shell. As a result, due to the curvature, moving laundry items are moved on or close to the drum shell somewhat in the axial direction or in the direction of an edge of the drum shell, so that the laundry items are moved more strongly within the drum. The so-called roll effect is thereby alleviated, since the laundry items in addition to the circumferential direction now additionally in the axial direction, based on the operational installation position of the drum, moves and / or at least sporadically receive motion pulses in the axial direction. In this case, it is possible to make the otherwise common driving ribs smaller or flatter, since the washing movement is enhanced by the arch structure in the casing. Optionally, the use of driving ribs can be completely dispensed with.
Für die Ausbildung der Wölbung ist es zweckmäßig, die Segmente zum Trommeläußeren hin gewölbt auszuführen. Dadurch werden unterschiedlich große Luftpolster bzw. zusätzlich Luftverwirbelungen im Bereich nah zum Trommelmantel geschaffen, wodurch die Wäschebewegung in axialer Richtung insgesamt verbessert wird.For the formation of the curvature, it is expedient to make the segments arched towards the outside of the drum. As a result, different sized air cushion or additional air turbulence in the area created close to the drum shell, whereby the laundry movement in the axial direction is improved overall.
In einer vorteilhaften Weiterbildung ist das Muster S-förmig oder mehrfach S-förmig geschwungen ausgebildet. Dadurch werden quer zur Umfangsrichtung Kraftimpulse bzw. Bewegungsimpulse in zwei entgegen gesetzte Richtungen auf die am Trommelmantel anliegenden Wäschestücke ausgeübt, so dass sich die Wäschestücke in axialer Richtung hin- und herbewegen, wenn die Trommel gedreht wird. Die Richtungsimpulse werden auch auf die Wäschestücke ausgeübt, die beim Wäschefall auf den Trommelmantel auftreffen oder an diesem entlang gleiten, so dass insgesamt eine scheinbar chaotische oder chaotischere bzw. inhomogenere Bewegung der Wäschestücke innerhalb der Trommel entsteht, als bei einer Trommel mit einer gleichmäßigen Wölbstruktur.In an advantageous embodiment, the pattern is S-shaped or S-shaped several times curved. As a result, force impulses or movement impulses are exerted transversely to the circumferential direction in two opposing directions on the laundry casing resting against the drum casing, so that the laundry items reciprocate in the axial direction when the drum is rotated. The directional impulses are also exerted on the items of laundry which impinge on the drum shell during the tumble or slide along it, so that on the whole a seemingly chaotic or chaotic or inhomogeneous movement of the items inside the drum is produced than in the case of a drum with a uniform arch structure.
Insgesamt ist es vorteilhaft, dass die gewölbten Segmente aus Vielecken gebildet sind, die mit ihren Randkonturen aneinanderliegen, wobei die Segmente eine Länge und eine Breite von etwa 1 bis 5 cm aufweisen. Dadurch ergibt sich eine nahezu zusammenhängende Wölbstruktur, die dadurch besonders effektiv die Bewegungsimpulse auf die Wäschestücke ausüben kann. Die Ecken der Vielecke, in diesem Beispiel wabenförmig angeordnete 6-Ecke, können abgerundet sein, so dass scharfkantige Übergänge vermieden werden. Die Abrundungen haben in dieser Ausführung einen Radius im Bereich von 2 bis 10 mm.Overall, it is advantageous that the curved segments are formed of polygons which abut each other with their edge contours, wherein the segments have a length and a width of about 1 to 5 cm. This results in a nearly coherent arch structure, which can thereby exert particularly effective movement impulses on the laundry. The corners of the polygons, in this example honeycombed 6-corner, can be rounded, so that sharp-edged transitions are avoided. The roundings in this embodiment have a radius in the range of 2 to 10 mm.
Die Höhe der Wölbungen ist so gewählt, dass sie etwa die gleiche Höhe aufweisen und dass die Höhe etwa 0,1 bis 2 mm beträgt. Dadurch sind die kleineren Segmente im Verhältnis zu ihrer Fläche stärker gewölbt, als die größeren Segmente, bezogen auf die Grundfläche des jeweils einzelnen Segments. Somit wird eine partiell unterschiedliche mechanische Einwirkung auf die Wäschestücke bewirkt, wodurch auch die durch die Wölbstruktur verursachten Bewegungsimpulse verstärkt werden.The height of the bulges is chosen so that they have about the same height and that the height is about 0.1 to 2 mm. As a result, the smaller segments are more curved in relation to their area than the larger segments, based on the base area of the respective individual segment. Thus, a partially different mechanical effect on the laundry is effected, whereby the motion caused by the vault structure movement pulses are enhanced.
In einer anderen Ausführung weisen die Wölbungen jeweils eine Höhe auf, die in etwa proportional zur Länge und Breite der Flächen ist, wobei die Höhe etwa 1/500 bis 1/20 der Breite bzw. der Länge des jeweiligen Segments entspricht. Das kann vorteilhaft sein, um übertrieben heftige Bewegungsimpulse für die Wäschestücke zu vermeiden und eine schonende Wäschebehandlung zu erreichen.In another embodiment, the bulges each have a height which is approximately proportional to the length and width of the surfaces, wherein the height corresponds to about 1/500 to 1/20 of the width or the length of the respective segment. This can be advantageous to avoid exaggerated violent impulses for the laundry and to achieve a gentle laundry treatment.
Zur Bereitstellung der unterschiedlich großen Segmente ist es zweckmäßig, dass die Segmente in Richtung des Trommelumfangs jeweils zumindest annähernd die gleiche Länge aufweisen und in Querrichtung jeweils eine unterschiedliche Breite aufweisen. Der Größenverlauf und die Anordnung sind so gewählt, dass sich das S-förmige Muster in Umfangsrichtung des Mantels ausbildet.In order to provide the segments of different sizes, it is expedient for the segments to have at least approximately the same length in the direction of the circumference of the drum and to have a different width in the transverse direction. The size and the arrangement are chosen so that the S-shaped pattern is formed in the circumferential direction of the shell.
In einer vorteilhaften Weiterbildung weisen die Segmente in Richtung des Trommelumfangs jeweils eine unterschiedliche Länge auf, so dass das gekrümmte bzw. S-förmige Muster entsprechend quer zur Umfangsrichtung des Mantels ausgebildet ist. In Kombination mit der Krümmung in Umfangsrichtung enthält das wellenförmige Muster einen transversalen und einen longitudinalen Anteil, wodurch die Inhomogenität der aus den Segmenten gebildeten Struktur vergrößert wird. Dadurch werden Kraftimpulse bzw. Bewegungsimpulse in Umfangsrichtung und quer zur Umfangsrichtung auf die Wäschestücke eingeleitet, was die Durchmischung der Wäschestücke mit der Trocknungsluft nochmals verbessert.In an advantageous development, the segments in the direction of the drum circumference each have a different length, so that the curved or S-shaped pattern is correspondingly formed transversely to the circumferential direction of the jacket. In combination with the circumferential curvature, the undulating pattern includes transverse and longitudinal portions, thereby increasing the inhomogeneity of the structure formed by the segments. As a result, force pulses or movement pulses are introduced in the circumferential direction and transversely to the circumferential direction of the laundry, which further improves the mixing of the laundry with the drying air.
In einer weiteren, zweckmäßigen Ausführung weist das sich in Umfangsrichtung erstreckende S-förmige Muster, ausgehend von der ungefähren Mittellinie des Mantels, einen ersten Scheitel in Richtung zur ersten Stirnwand und einen zweiten Scheitel in Richtung zur zweiten Stirnwand auf. Somit ist sichergestellt, dass sich die wellenförmige Struktur zumindest nahezu über die gesamte Breite des Trommelmantels abzeichnet.In a further expedient embodiment, the circumferentially extending S-shaped pattern, starting from the approximate centerline of the shell, has a first vertex toward the first end wall and a second vertex toward the second end wall. This ensures that the wave-shaped structure is apparent at least almost over the entire width of the drum shell.
In einer vorteilhaften Weiterbildung ist der Trommelmantel in zumindest zwei Abschnitte aufgeteilt, wobei in jedem Abschnitt jeweils ein S-förmiges Muster bzw. ein mehrfach S-förmig geschwungenes Muster aus gewölbten Segmenten angeordnet ist. In den Bereichen zwischen den einzelnen Abschnitten können Mitnehmerrippen angebracht sein, die die Wäschestücke beim Drehen der Trommel anheben, so dass sie sich im oberen Drittel wieder ablösen und nach unten fallen. Die Mitnehmerrippen können hierbei sehr flach gehalten werden, vorzugsweise im Bereich von etwa 1 bis 2 cm bei einem Trommeldurchmesser von 50 bis 65 cm.In an advantageous development of the drum shell is divided into at least two sections, wherein in each section in each case an S-shaped pattern or a multiple S-shaped curved pattern of domed segments is arranged. In the areas between the individual sections can be mounted driving ribs, which lift the laundry items as the drum is rotated, so that they peel off again in the upper third and fall down. The driver ribs can be kept very flat, preferably in the range of about 1 to 2 cm with a drum diameter of 50 to 65 cm.
Das gekrümmte bzw. S-förmige Muster ist auf dem Mantel derart ausgebildet, dass sich ein gekrümmter bzw. S-förmiger Steg ohne Wölbungen bzw. Wölbstruktur ergibt. Dadurch wird eine verbesserte Führung der Wäschestücke entlang des gekrümmten bzw. S-förmigen, glatten Stegs erreicht. Hierbei ist es zweckmäßig, dass der Steg etwa die Breite aufweist, die der Länge eines Segments in Umfangsrichtung entspricht. Somit wird sozusagen eine Segmentbreite von Wölbungen freigehalten, wobei bei der S-förmigen Ausführung der Steg etwa im Mittenbereich bzw. Äquatorialbereich des Mantels beginnt und nach seinen bogenförmigen Auslenkungen wieder im Äquatorialbereich endet.The curved or S-shaped pattern is formed on the jacket such that a curved or S-shaped web results without buckling or arch structure. As a result, an improved guidance of the laundry items along the curved or S-shaped, smooth web is achieved. It is expedient that the web has approximately the width corresponding to the length of a segment in the circumferential direction. Thus, so to speak, a segment width is kept free of bulges, wherein in the S-shaped embodiment of the web starts approximately in the central region or equatorial region of the shell and ends after his arcuate deflections back in the equatorial region.
In einer vorteilhaften Weiterbildung variiert die Breite des Stegs, wobei die Breite des Stegs an der schmalsten Stelle im Mittenbereich des Trommelabschnitts oder des Trommelumfangs ungefähr der Länge eines Segments und an der breitesten Stelle im Scheitelbereich bzw. an den Enden des S-förmigen Stegs ungefähr der Länge des 1,5 bis 2 fachen eines Segments entspricht. Das heißt, beginnend im Äquatorialbereich des Mantels ist der Steg um das 1,5 bis 2 fache breiter ausgeführt, als im Mittenbereich des Stegs, wobei sich die Mitte des Stegs, bezogen auf den Umfang des Trommelmantels, ebenfalls im Äquatorialbereich befindet. Die bogenförmigen Auslenkungen des Stegs weichen einmal in Richtung der ersten Stirnwand und einmal in Richtung der zweiten Stirnwand der Trommel von der Äquatorialline ab.In an advantageous embodiment, the width of the web varies, wherein the width of the web at the narrowest point in the central region of the drum portion or the drum circumference approximately the length of a segment and at the widest point in the apex region or at the ends of the S-shaped web approximately Length of 1.5 to 2 times a segment corresponds. That is, starting in the equatorial region of the shell of the web is designed to be 1.5 to 2 times wider than in the center region of the web, wherein the center of the web, based on the circumference of the drum shell, is also located in the equatorial region. The arcuate deflections of the web deviate once in the direction of the first end wall and once in the direction of the second end wall of the drum from the equatorial line.
In einer vorteilhaften Weiterbildung ist der Steg mit zusätzlichen zum Trommeläußeren und / oder Trommelinneren gerichteten Flächen versehen, wobei die gewölbten Flächen jeweils eine Länge in Umfangsrichtung des Mantels von etwa dem 0,4 bis 0,8 fachen der Länge eines nächstgelegenen Segments aufweisen und eine Breite von etwa dem 0,4 bis 0,8 fachen der Breite eines nächstgelegenen Segments aufweisen. Dadurch wird die Führung der am Mantel entlang gleitenden Wäschestücke in axialer Richtung bzw., in Richtung der Stirnwände nochmals verbessert.In an advantageous development of the web is provided with additional directed to the drum outer and / or drum interior surfaces, wherein the curved surfaces each have a length in the circumferential direction of the shell of about 0.4 to 0.8 times the length of a nearest segment and a width from about 0.4 to 0.8 times the width of a nearest segment. As a result, the leadership of the coat along sliding laundry in the axial direction or, in the direction of the end walls is further improved.
Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen rein schematisch dargestellt und wird nachfolgend näher beschrieben. Es zeigen:
- Fig. 1:
- einen Wäschetrockner in einer skizzierten Schnittdarstellung;
- Fig. 2:
- die Trommel in einer perspektivischen Ansicht und
- Fig. 3 bis 7:
- den Trommelmantel in einer abgewickelten Ansicht in unterschiedlichen Ausführungen.
- Fig. 6:
- fällt nicht under die vorliegende Erfindung.
- Fig. 1:
- a tumble dryer in a sketched sectional view;
- Fig. 2:
- the drum in a perspective view and
- 3 to 7:
- the drum shell in a developed view in different versions.
- Fig. 6:
- does not fall under the present invention.
In
In
In
In
In
Claims (13)
- Drum (3) for a tumble dryer (1) in which the drum (3) can be rotatably mounted via a horizontal or inclined shaft (7), comprising an approximately cylindrical casing (19) of which the surface comprises a structure which consists of individual domed segments (22), the size of the segments (22) being configured to be different such that the structure made up of the domed segments (22) forms a bent or S-shaped pattern on the surface of the casing (19),
characterised in that
the curved or S-shaped pattern on the casing (19) is configured such that a curved or S-shaped web (24) without domes or a domed structure is produced. - Drum according to claim 1,
characterised in that
the segments (22) are domed towards the outside of the drum. - Drum according to claim 1,
characterised in that
the pattern is at least simply bent in an S-shape. - Drum according to claim 3,
characterised in that
each of the segments (22) are at least approximately of the same length (L) in the circumferential direction (U) of the casing (19) and are of a different width (B) in the transverse direction, such that the S-shaped bent pattern is formed in the circumferential direction (U) of the casing (19). - Drum according to either claim 1 or claim 3,
characterised in that
each of the segments (22) is of a different length (L) in the circumferential direction (U) of the casing (19), such that the curved or S-shaped pattern is correspondingly formed transverse to the circumferential direction (U) of the casing (19). - Drum according to claim 3,
characterised in that
the S-shaped pattern (28) extending in the circumferential direction (U), starting from the approximate centreline (EQ) of the casing (19) which is circumferential in the circumferential direction (U), comprises a first apex towards the first casing edge (19a) and a second apex towards the opposite second casing edge (19b). - Drum according to any of claims 1 to 6,
characterised in that
the drum casing (19) is divided into at least two portions (26), and in that an S-shaped pattern made up of domed segments (22) is arranged in each of the respective portions (26). - Drum according to claim 1,
characterised in that
the domed segments (22) are formed from polygons of which the edge contours are juxtaposed directly or with spacing (R), the segments being of a length (L) and a width (B) of approximately 1 to 5 cm. - Drum according to either claim 1 or claim 2,
characterised in that
the domes (23) are of approximately the same height (h), and in that the height (h) is approximately 0.1 to 2 mm. - Drum according to either claim 1 or claim 2,
characterised in that
each of the domes (23) is of a height (h) which is approximately proportional to the length (L) and the width (B) of the segments (22), the height corresponding approximately to 1/500 to 1/20 of the width (B) and the length (L) of the respective segment (22). - Drum according to claim 10,
characterised in that
the web (24) is approximately of a width (B) which corresponds to the length (L) of a segment (22) in the circumferential direction (U). - Drum according to claim 11,
characterised in that
the width of the web (24) varies, the width (B) of the web (24) at the narrowest point in the central region of the drum portion (26) or of the drum circumference (U) approximately corresponding to the length of a segment (22), and at the widest point in the apex region or at the ends of the S-shaped webs (24) approximately corresponding to 1.5 times to twice the length of a segment (22). - Drum according to any of claims 1, 11 and 12,
characterised in that
the web (24) is provided with additional domed surfaces (27) oriented towards the outside of the drum and/or the inside of the drum, each of the domed surfaces (27) being of a length in the circumferential direction (U) of the casing (19) of approximately 0.4 to 0.8 times the length (L) of the closest segment (22) and of a width (B) of approximately 0.4 to 0.8 times the width (B) of the closest segment (22).
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08018120A EP2177656B1 (en) | 2008-10-16 | 2008-10-16 | Drum for a laundry dryer |
ES08018120T ES2395983T3 (en) | 2008-10-16 | 2008-10-16 | Drum for a clothes dryer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08018120A EP2177656B1 (en) | 2008-10-16 | 2008-10-16 | Drum for a laundry dryer |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2177656A1 EP2177656A1 (en) | 2010-04-21 |
EP2177656B1 true EP2177656B1 (en) | 2012-11-28 |
Family
ID=40451370
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08018120A Not-in-force EP2177656B1 (en) | 2008-10-16 | 2008-10-16 | Drum for a laundry dryer |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2177656B1 (en) |
ES (1) | ES2395983T3 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2558254T3 (en) | 2010-10-14 | 2016-02-02 | Alliance Laundry CE s.r.o | Drum for washing machine |
KR102396321B1 (en) * | 2016-07-12 | 2022-05-10 | 삼성전자주식회사 | Washing machine |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4131005A1 (en) | 1990-12-04 | 1992-06-11 | Bauknecht Hausgeraete | Household appliance, e.g. laundry dryer, - has several entraining means on drum inside which are flat, slightly rounded and evenly distributed |
DE19603710A1 (en) * | 1996-02-02 | 1997-08-07 | Aeg Hausgeraete Gmbh | Washer dryer, for minimised noise during washing and spinning |
DE29705226U1 (en) | 1997-03-22 | 1998-07-23 | AEG Hausgeräte GmbH, 90429 Nürnberg | Washing drum for a washing machine |
DE19731666A1 (en) * | 1997-07-23 | 1999-01-28 | Aeg Hausgeraete Gmbh | Laundry drum for electric washing machine |
DE10145079C1 (en) | 2001-09-13 | 2002-10-10 | Miele & Cie | Drum, for washer-dryer, has casing surface at least partly provided with indentations in form of honeycomb curvature structure whose honeycomb surfaces face outside of drum |
DE102005026175A1 (en) | 2005-06-06 | 2006-12-07 | BSH Bosch und Siemens Hausgeräte GmbH | Water-conducting household appliance with a laundry drum embossed |
-
2008
- 2008-10-16 ES ES08018120T patent/ES2395983T3/en active Active
- 2008-10-16 EP EP08018120A patent/EP2177656B1/en not_active Not-in-force
Also Published As
Publication number | Publication date |
---|---|
EP2177656A1 (en) | 2010-04-21 |
ES2395983T3 (en) | 2013-02-18 |
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