EP2446799A2 - Dishwasher - Google Patents
Dishwasher Download PDFInfo
- Publication number
- EP2446799A2 EP2446799A2 EP11185089A EP11185089A EP2446799A2 EP 2446799 A2 EP2446799 A2 EP 2446799A2 EP 11185089 A EP11185089 A EP 11185089A EP 11185089 A EP11185089 A EP 11185089A EP 2446799 A2 EP2446799 A2 EP 2446799A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- inlet pipe
- liquid inlet
- dishwasher according
- connecting piece
- axis
- 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
Links
- 239000007788 liquid Substances 0.000 claims abstract description 67
- 238000005507 spraying Methods 0.000 claims abstract description 33
- 239000007921 spray Substances 0.000 claims description 52
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000011010 flushing procedure Methods 0.000 abstract description 6
- 239000012530 fluid Substances 0.000 description 6
- 238000007667 floating Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000004851 dishwashing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
- A47L15/4219—Water recirculation
- A47L15/4221—Arrangements for redirection of washing water, e.g. water diverters to selectively supply the spray arms
Definitions
- the invention relates to a dishwasher, in particular a domestic dishwasher, with at least one spraying device which is mounted rotatably about a rotation axis on a liquid inlet pipe.
- Such a spraying device serves for uniformly distributing the rinsing liquid to the items to be washed located in the washing compartment of the dishwasher.
- the rinsing liquid flowing out of the liquid inlet pipe into the spraying device is introduced into the spraying device in the middle and deflected into spray arms which are opposite from each other, from which it exits through a plurality of openings and causes the spraying device to rotate in order to achieve a uniform distribution of the rinsing liquid on the dishes ,
- the invention is based on the object of specifying a dishwasher with at least one spray device, which is mounted rotatably about a rotation axis on a liquid inlet pipe, and with which even at moderate flow velocities of the rinsing liquid flowing in the liquid inlet pipe, a sufficiently large exit velocity of the rinsing liquid from the in the spray arms located openings can be achieved.
- the spray device is mounted with a central connecting piece rotatable about a rotation axis on a liquid inlet pipe.
- the spraying device is designed in particular as a spray arm mounted in a rotatable manner, from whose axis of rotation and by means of the connecting piece central liquid feed two Sprüharmabitese emanate in opposite directions and extending in the radial direction.
- a flow-guiding body is arranged, which divides the rinsing liquid flowing into the spraying device from the liquid inlet pipe into two partial streams and into opposite directions. oriented parallel to a longitudinal axis of the spray device directions, in particular in the two Sprüharmabête, into deflects.
- the flow guide is formed by a rib extending transversely to the longitudinal axis, forming the lateral flanks of a Anströmschräge for entering from the liquid inlet pipe in the spray water.
- a particularly low-loss deflection is achieved.
- such a rib manufacturing technology is easy to implement.
- the spraying device is axially fixed in a final assembly position by a permanent magnet arrangement on the liquid inlet pipe.
- a permanent magnet arrangement on the liquid inlet pipe.
- At least one Sprüharmschale (except for the spray nozzle openings) can be formed continuously closed along its entire longitudinal extent, ie an opening approximately in the middle of the longitudinal extension of the Sprüharms for passage of the connecting piece of remplisstechnikszubuch- or liquid inlet pipe can be avoided in one of the two Sprüharmschreibschalen since a breakthrough in the other Sprüharmschreibschale sufficient for coupling the connection piece of the spray.
- the spraying device comprises a central connecting piece for connection to the liquid inlet pipe, with which it is rotatably mounted on the liquid inlet pipe, wherein the permanent magnet assembly comprises a liquid inlet pipe and a ring arranged on the connecting ring, which are arranged in the final assembly position coaxial with each other.
- the mounting end position is hereinafter referred to as the state that is established after the installation of the spray device on the liquid inlet pipe when the spray device is not in operation, i. if it is not flowed through by rinsing liquid. Accordingly, the operating state is to be understood as the state that occurs when the spray device flows through the rinsing liquid and is set in a rotational movement.
- an end portion of the liquid inlet pipe is disposed within the connecting piece and the end portion and the connecting piece is provided with an annular peripheral support flange, with which the insertion depth of the end portion is limited in the connecting piece.
- the support flange may serve as a liquid and / or dirt deflector, e.g. From top to bottom dripping rinsing fluid or falling debris from the bearing point of the invention largely keeps away.
- the end portion of the liquid inlet pipe has according to an advantageous development of the invention on its outer periphery one or more, in particular a plurality of annular circumferential ribs. These are preferably with their free ends in the radial direction outwardly from the end portion above the ring magnet from. Each two consecutive ribs in the axial direction have a height distance from one another viewed in the axial extent of the axis of rotation.
- the ribs serve for the connection of the spraying device, in particular of the rotatably mounted spray arm, surrounding the end section to the outside, a radial support or guidance, i. to provide a radial bearing.
- the occurrence of leakage at the bearing point between the spraying device and the liquid inlet pipe can be largely avoided with the aid of the ribs.
- a dishwashing machine comprises a spraying device 2 which is rotatably mounted on a liquid inlet pipe 8 about a rotation axis 6 perpendicular to the longitudinal axis 4 of the spraying device.
- the spray device 2 comprises a central, substantially cylindrical connecting piece 10, the center axis of which is aligned coaxially with the axis of rotation 6.
- the connecting piece 10 Starting from the connecting piece 10 extending in opposite directions or diametrically opposite each other, ie offset by about 180 ° to each other, two about the same length Sprüharmabête or half arms.
- the two half-arms thus form a rotatably mounted spray arm, which is rotatably mounted centrally.
- the spray arm is preferably composed of an upper shell and a lower shell.
- This is provided with an outer circumference annular circumferential support flange 14 whose It forms an axial stop or a thrust bearing for the axially movable connection piece 10.
- the support flange 14 limits the insertion depth of the end portion 12 in the connecting piece 10.
- the end face facing away from the spray device 2 16th of the connecting piece 10 serving as a stop surface for the support flange 14 flange-like widening.
- the abutment surfaces may also be formed by the end face of the end portion and by a shoulder annularly extending in the connecting piece.
- the connecting piece 10 is mounted with a radial clearance outside on the end portion 12 to allow a low-friction rotational movement of the spray 2.
- At its outer periphery of the end portion 12 is provided with annular circumferential ribs 17 whose outer diameter is slightly smaller than the inner diameter of the connecting piece 10. These serve as a radial bearing or as a radial guide for the end portion 12 outside surrounding connecting piece 10.
- the by the radial clearance at exactly centric arrangement resulting annular gap between the ribs 17 and the connecting piece 10 is narrow to minimize the escape of flushing fluid W as far as possible.
- the spray device 2 is fixed to the liquid inlet pipe 8 with a permanent magnet arrangement 20a, which consists of two ring magnets 22a, 24a. These are arranged in the connecting piece 10 and in the end portion 12. Specifically, the ring magnet 22a is mounted in a recess 18 in the inner wall of the fitting 10, while the ring magnet 24a is mounted on a lower end-side radially outwardly projecting flange ring of the end portion 12. It is covered by the bottom of the ribs 17 from above and framed in the annular groove between the bottom rib and the flange.
- the connecting piece 10 and the end portion 12 are thus suitably annular circumferential, rectangular in cross-section grooves or recesses 18 and 19, in which the ring magnets 22a, 24a are arranged. They are arranged offset in the radial direction and in the axial direction (relative to the axis of rotation 6) against each other.
- the ring magnets 22a, 24a each have a radial polarity. The radial polarities are directed opposite to each other, so that the ring magnets 22a, 24a repel each other in the axial direction due to their axial offset.
- the magnetic force acting between the ring magnets 22a, 24a is directed parallel to the axis of rotation 6 in the case of axially offset and centric arrangement, ie, about the axis of rotation 6, of the ring magnets 22a, 24a.
- the ring magnet 22a of the connection piece 10 lies in the radial direction on a circular path further outward than the ring magnet 24a of the end piece 12. Seen from above in plan view, the outer ring magnet 22a surrounds the inner ring magnet 24a.
- the ring nut 22 a arranged in the connection piece 10 is located between the ring magnet 24 a arranged in the end section 12 and the support flange 14, so that the between the Ring magnet 22a and 24a acting magnetic repulsion force presses the connection piece 10 against the support flange 14, which serves as an axial stop.
- This magnetic force is dimensioned so that it is greater than the forces occurring during operation, acting on the sprayer 2 against the magnetic force in the direction of the axis of rotation 6 forces to fix the spray 2 at the liquid inlet pipe 8 and hold.
- a flow guide 28 is arranged on the wall 26 of the connecting piece 10 opposite wall 27, here in the embodiment on the inner wall of the lower shell of the spray 2, in particular the Sprüharms, from the end portion 12 of the liquid inlet pipe 8 in the spray 2 inflowing rinsing liquid W divides into two sub-streams and deflects into each other in opposite directions, parallel to the longitudinal axis 4 of the spray device 2 oriented directions so that it enters into the outlet openings 34 provided with spray arms 36 and 38 of the spray device 2.
- the flow guide 28 is formed by a rib extending transversely to the longitudinal axis 4, the lateral flanks 40 form a Ansträgeschräge for emerging from the liquid inlet pipe 8 in the spray 2 rinsing fluid W and deflect them with little hydraulic losses to the spray arms 36, 38. Since the flow guide 28 is arranged on the spraying device 2 and rotates with it, an optimal, low-loss hydraulic deflection in the spray arms 36, 38 is ensured at each rotational position of the spray device.
- Fig. 2 has an alternative permanent magnet arrangement 20b also in the radial direction poled ring magnets 22b, 24b, which are arranged in the end portion 12 of the liquid inlet pipe 8 and in the connecting piece 10, but differing from the in Fig. 1 embodiment shown in the same direction are radially poled and are arranged opposite to each other in the radial direction, so that the ring magnet 22b surrounds the ring magnet 24b outside substantially concentric. Since the ring magnets 22b, 24b are radially poled in the same direction, they attract each other and center the end portion 12 in the spigot 10.
- the ring magnets 22, 24 are coaxial with each other with a small axial offset, ie, along their axial length arranged overlapping, which is arranged at the end portion 12, ie further provided inside ring magnet 24b in the adjusting in the final position position closer to the support flange 14 as the axially movably mounted connection piece 10 further outwardly disposed ring magnet 22b.
- the inner ring magnet 24b is therefore positioned slightly higher than the outer ring magnet 22b.
- the two ring magnets 22b, 24b exert on each other an attractive force acting in the direction of the axis of rotation 6, so that support flange 14 of the end section 12 and end face 16 of the connecting piece 10 are pressed against one another.
- Such a small axial offset is necessary in order to exert on the spraying device 2 a force directed towards the support flange 14 of the end section 12, which is necessary for the hydraulic forces acting on the spraying device 2 in the opposite direction and for arranging the spraying device 2 below the liquid inlet pipe 8 to compensate for the effective weight.
- the end face 16 may rest during operation still on the support flange 14 with a correspondingly reduced bearing force or it may result in a floating equilibrium position in which between the support flange 14 and the end face 16, a narrow gap is present.
- ring magnets 22c, 24c which are axially poled in opposite directions.
- the ring magnets 22c, 24c are set in series in the axial direction of the axis of rotation 6 in series and offset from one another in the radial direction. As a result, they exert a repulsive magnetic force acting in the direction of the axis of rotation 6 on each other.
- the ring magnet 22c arranged on the connection piece 10 is arranged between the support flange 14 and the ring magnet 24c arranged on the end section 12, ie the ring magnet 22c of the end connection 10 lies in the axial direction, in particular completely below the ring magnet 24c of the end section 12 , so that on the connecting piece 10 and thus the spraying device 2 a directed towards the support flange 14 toward magnetic force is exerted.
- By suitable dimensioning of the ring magnets 22c, 24c an axially floating mounting of the connecting piece can also be achieved in the operating state.
- ring magnets 22d, 24d provided with opposite polarity in the axial direction.
- the outer ring magnet 22d surrounds the inner ring magnet 24d substantially concentrically, ie both are aligned approximately on the same radial straight line and largely overlap.
- the mode of action of the ring magnets 22d, 24d corresponds to the mode of action in FIG Fig. 2 shown ring magnets 22b, 24b, which have a radial polarity in the same direction. Also in this case of FIG.
- the ring magnets 22d, 24d have a minimum axial overlap offset in order to exert on each other an attractive force acting in the direction of the axis of rotation 6 and to generate a force directed towards the spraying device 2 towards the support flange 14.
- the ring magnet 24d of the stationary, that is staioncer, end portion 12 located radially inwardly is seated with a height offset relative to the radially outer ring magnets 22d of the axially and possibly radially movable connection piece, ie it is positioned higher than the outer ring magnet 22d.
- the arranged in the connecting piece 10 ring magnets 22a-d expediently an inner diameter, the is slightly larger than the outer diameter of the arranged in the end portion 12 ring magnets 24a-d.
- the ring magnets 22, 24 have the same inner and outer diameter and may differ at best in the direction of their polarity.
- a permanent magnet arrangement 20e in which two ring magnets 22e, 24e are provided with the same axial polarity and arranged approximately in a straight line in a row in the vertical or axial direction one behind the other.
- the ring magnet 22e of the connecting piece 10 is positioned lower than the ring magnet 24e of the end portion 12. He is here completely below the ring magnet 24e.
- the two ring magnets 22e, 24e attract each other, so that then a directed towards the support flange 14 force is exerted on the spray device 2, if, as in Fig. 5 represented, which is arranged in the end portion 12 ring magnet 24e of the end portion 12 between the support flange 14 and arranged in the connecting piece 10 ring magnet 22e.
- ring magnets can be used, which in opposite directions (see FIG. 3 ) are axially poled.
- the ring magnet 22e located in the connection piece is arranged between the support flange 14 and the ring magnet 24e located in the end section 12, in order to effect a spraying force on the spraying device 2 towards the supporting flange 14.
- the ring magnet 22e of the connecting piece 10 is expediently above, that is arranged above the ring magnet 24e of the end portion 12 and in the axial direction in alignment therewith, so that between the two opposite-pole ring magnet 22e, 24e a magnetic counterforce zw movable connection piece 10 presses upwards in the direction of support flange 14.
- ring magnets with identical or opposite axial polarity instead of ring magnets with identical or opposite axial polarity, alternatively ring magnets with oppositely directed radial polarity can be used.
- inner ring magnet of the end portion 12 slightly lower in the axial direction offset from the outer, now provided with a relation to the inner ring magnet opposite radial polarity ring magnet of the connecting piece 10, so that a repulsive force on the outer magnet and thus the end neck in the axial direction up to the support flange 14 acts.
- ring magnets which are radially poled in the same direction as in the arrangement of FIG. 2 is clarified.
- the inner ring magnet of the end portion 12 is slightly higher offset relative to the outer ring magnet of the connecting piece 10 to raise the axially movable connecting piece upwardly in the direction of support flange 14 by the occurring magnetic attraction between the two rectified ring magnet.
- the end section 12 of the liquid inlet pipe 8 is mounted in the connecting piece 10 of the spraying device 2.
- This arrangement has the advantage that virtually no flushing liquid escapes through a gap required for low-friction support of the connecting piece 10 between the end section 12 and the connecting piece 10. In principle, it is also possible to minimize the gap by correspondingly small tolerances and to store the connection piece in the end section.
- the ring magnets 22a-e and in each case the ring magnets 24a-e have the same overall height and the same width or the same radial extent. Basically, these may differ in their dimensions but also from each other.
- the spray device 2 can be used as an alternative to the in Fig. 1 to 5 be shown magnetic bearings also be mounted in another way on the liquid inlet pipe 8.
- Fig. 6 a simple embodiment of a mechanical bearing is illustrated.
- the connecting piece 10 is provided with a circular circumferential recess 42 on the inner circumference, in which a on the outer circumference of opening into the connecting piece 10 end portion 12 of the liquid inlet pipe 8 arranged, also annular encircling, spherically shaped rib 44 engages in the form of a snap connection and the Sprayer 2 fixed axially.
Abstract
Description
Die Erfindung bezieht sich auf eine Geschirrspülmaschine, insbesondere eine Haushaltsgeschirrspülmaschine, mit zumindest einer Sprüheinrichtung, die drehbar um eine Drehachse an einem Flüssigkeitseinlaufrohr gelagert ist.The invention relates to a dishwasher, in particular a domestic dishwasher, with at least one spraying device which is mounted rotatably about a rotation axis on a liquid inlet pipe.
Eine derartige Sprüheinrichtung dient zum gleichmäßigen Verteilen der Spülflüssigkeit auf das im Spülraum der Geschirrspülmaschine befindliche Spülgut. Die aus dem Flüssigkeitseinlaufrohr in die Sprüheinrichtung strömende Spülflüssigkeit wird mittig in die Sprüheinrichtung eingeleitet und in einander gegenüberliegende Sprüharme umgelenkt, aus denen es durch eine Mehrzahl von Öffnungen ausströmt und die Sprüheinrichtung in eine Drehbewegung versetzt, um eine gleichmäßige Verteilung des Spülflüssigkeit auf dem Spülgut zu erzielen.Such a spraying device serves for uniformly distributing the rinsing liquid to the items to be washed located in the washing compartment of the dishwasher. The rinsing liquid flowing out of the liquid inlet pipe into the spraying device is introduced into the spraying device in the middle and deflected into spray arms which are opposite from each other, from which it exits through a plurality of openings and causes the spraying device to rotate in order to achieve a uniform distribution of the rinsing liquid on the dishes ,
Der Erfindung liegt nun die Aufgabe zugrunde, eine Geschirrspülmaschine mit zumindest einer Sprüheinrichtung anzugeben, die drehbar um eine Drehachse an einem Flüssigkeitseinlaufrohr gelagert ist, und mit der auch bei moderaten Strömungsgeschwindigkeiten der im Flüssigkeitseinlaufrohr strömenden Spülflüssigkeit eine hinreichend große Austrittsgeschwindigkeit der Spülflüssigkeit aus den in den Sprüharmen befindlichen Öffnungen erreicht werden kann.The invention is based on the object of specifying a dishwasher with at least one spray device, which is mounted rotatably about a rotation axis on a liquid inlet pipe, and with which even at moderate flow velocities of the rinsing liquid flowing in the liquid inlet pipe, a sufficiently large exit velocity of the rinsing liquid from the in the spray arms located openings can be achieved.
Die genannte Aufgabe wird gemäß der Erfindung gelöst mit einer Geschirrspülmaschine mit den Merkmalen des Patentanspruches 1. Gemäß diesen Merkmalen ist die Sprüheinrichtung mit einem zentralen Anschlussstutzen drehbar um eine Drehachse an einem Flüssigkeitseinlaufrohr gelagert. Die Sprüheinrichtung ist insbesondere als rotierbar gelagerter Sprüharm ausgebildet, von dessen Drehachse und mittels des Anschlussstutzens mittiger Flüssigkeitseinspeisung zwei Sprüharmabschnitte in entgegengesetzte Richtungen ausgehen und sich in radialer Richtung erstrecken. An einer der Mündungsöffnung des Anschlussstutzens gegenüberliegenden Wand der Sprüheinrichtung ist ein Strömungsleitkörper angeordnet, der die aus dem Flüssigkeitseinlaufrohr in die Sprüheinrichtung einströmende Spülflüssigkeit in zwei Teilströme aufteilt und in einander entgegengesetzte, parallel zu einer Längsachse der Sprüheinrichtung orientierte Richtungen, insbesondere in die beiden Sprüharmabschnitte, hinein umlenkt.The above object is achieved according to the invention with a dishwasher with the features of claim 1. According to these features, the spray device is mounted with a central connecting piece rotatable about a rotation axis on a liquid inlet pipe. The spraying device is designed in particular as a spray arm mounted in a rotatable manner, from whose axis of rotation and by means of the connecting piece central liquid feed two Sprüharmabschnitte emanate in opposite directions and extending in the radial direction. On a wall of the spraying device opposite the mouth of the connecting piece, a flow-guiding body is arranged, which divides the rinsing liquid flowing into the spraying device from the liquid inlet pipe into two partial streams and into opposite directions. oriented parallel to a longitudinal axis of the spray device directions, in particular in the two Sprüharmabschnitte, into deflects.
Durch diese Maßnahmen wird eine hydraulisch verlustarme Umlenkung der aus dem Flüssigkeitseinlaufrohr austretenden Spülflüssigkeit in die beiden Sprüharmabschnitte der Sprüheinrichtung erreicht, so dass die Spülflüssigkeit mit hoher Geschwindigkeit innerhalb der beiden Sprüharmabschnitte zu den darin befindlichen Öffnungen strömt. Durch die Anbringung eines die Umlenkung bewirkenden Strömungsleitkörpers wird außerdem die auf die Sprüheinrichtung durch die aus dem Flüssigkeitseinlaufrohr zuströmende und auf die der Mündungsöffnung des Anschlussstutzens gegenüberliegenden Wand auftreffende Spülflüssigkeit parallel zur Drehachse der Sprüheinrichtung ausgeübte Kraft verringert, so dass die im Drehlager auftretenden Reibungskräfte entsprechend verringert sind.As a result of these measures, a hydraulic low-loss deflection of the rinsing liquid emerging from the liquid inlet pipe into the two spray arm sections of the spray device is achieved so that the rinsing liquid flows at high speed within the two spray arm sections to the openings therein. By attaching a deflecting causing Strömungsleitkörpers also on the spray through the inflowing from the liquid inlet pipe and on the opposite wall of the connecting piece wall adjacent flushing liquid is applied parallel to the axis of rotation of the spray force is reduced, so that the friction forces occurring in the pivot bearing are reduced accordingly ,
In einer vorteilhaften Ausgestaltung der Erfindung ist der Strömungsleitkörper durch eine quer zu Längsachse verlaufende Rippe gebildet, deren seitliche Flanken eine Anströmschräge für das aus dem Flüssigkeitseinlaufrohr in die Sprüheinrichtung eintretende Wasser bilden. Dadurch wird eine besonders verlustarme Umlenkung erzielt. Darüber hinaus ist eine solche Rippe fertigungstechnisch einfach realisierbar.In an advantageous embodiment of the invention, the flow guide is formed by a rib extending transversely to the longitudinal axis, forming the lateral flanks of a Anströmschräge for entering from the liquid inlet pipe in the spray water. As a result, a particularly low-loss deflection is achieved. In addition, such a rib manufacturing technology is easy to implement.
Gemäß einer vorteilhaften Weiterbildung der Erfindung ist außerdem die Sprüheinrichtung in einer Montageendposition durch eine Permanentmagnetanordnung am Flüssigkeitseinlaufrohr axial fixiert. Durch diese Maßnahme ist es auf fertigungstechnisch einfache Weise möglich, die Sprüheinrichtung weitgehend verschleiß- und reibungsarm am Flüssigkeitszulaufrohr, insbesondere Flüssigkeitseinlaufrohr, zu lagern. Denn es lässt sich in vorteilhafter Weise für die Sprüheinrichtung, insbesondere einen Sprüharm, durch die erfindungsgemäße Magnetanordnung eine schwebende Drehlagerung bereitstellen. Zudem kann mindestens eine Sprüharmschale (bis auf die Sprühdüsenöffnungen) durchgängig entlang ihrer gesamten Längserstreckung geschlossen ausgebildet werden, d.h. ein Durchbruch etwa in der Mitte der Längserstreckung des Sprüharms zur Hindurchführung des Anschlussstutzens des Flüssigkeitszufuhr- bzw. Flüssigkeitseinlaufrohrs kann in einer der beiden Sprüharmhalbschalen vermieden werden, da ein Durchbruch in der anderen Sprüharmhalbschale zur Ankopplung des Anschlussstutzens der Sprüheinrichtung ausreicht.According to an advantageous development of the invention, moreover, the spraying device is axially fixed in a final assembly position by a permanent magnet arrangement on the liquid inlet pipe. By this measure, it is possible in a simple manufacturing technology, the spray largely wear and low friction on the liquid inlet pipe, in particular liquid inlet pipe to store. Because it can be provided in an advantageous manner for the spray, in particular a spray arm, by the magnet arrangement according to the invention, a floating pivot bearing. In addition, at least one Sprüharmschale (except for the spray nozzle openings) can be formed continuously closed along its entire longitudinal extent, ie an opening approximately in the middle of the longitudinal extension of the Sprüharms for passage of the connecting piece of Flüssigkeitszufuhr- or liquid inlet pipe can be avoided in one of the two Sprüharmhalbschalen since a breakthrough in the other Sprüharmhalbschale sufficient for coupling the connection piece of the spray.
In einer bevorzugten Ausführungsform umfasst die Sprüheinrichtung einen zentralen Anschlussstutzen zum Anschließen an das Flüssigkeitseinlaufrohr, mit dem sie drehbar am Flüssigkeitseinlaufrohr gelagert ist, wobei die Permanentmagnetanordnung einen am Flüssigkeitseinlaufrohr und einem am Anschlussstutzen angeordneten Ringmagneten umfasst, die in der Montageendposition koaxial zueinander angeordnet sind. Dadurch ist die Montage vereinfacht, da es ausreicht, Flüssigkeitseinlaufrohr und Anschlussstutzen lediglich ineinander zu schieben, bis die Montageendposition erreicht ist.In a preferred embodiment, the spraying device comprises a central connecting piece for connection to the liquid inlet pipe, with which it is rotatably mounted on the liquid inlet pipe, wherein the permanent magnet assembly comprises a liquid inlet pipe and a ring arranged on the connecting ring, which are arranged in the final assembly position coaxial with each other. As a result, the assembly is simplified, since it is sufficient to slide fluid inlet pipe and connecting pieces only into each other until the final assembly position is reached.
Als Montageendposition wird nachfolgend der Zustand bezeichnet, der sich nach erfolgter Montage der Sprüheinrichtung am Flüssigkeitseinlaufrohr einstellt, wenn die Sprüheinrichtung nicht im Betrieb ist, d.h. wenn sie nicht von Spülflüssigkeit durchströmt wird. Dementsprechend ist als Betriebszustand der Zustand zu verstehen, der sich einstellt, wenn die Sprüheinrichtung von Spülflüssigkeit durchströmt und in eine Drehbewegung versetzt wird.The mounting end position is hereinafter referred to as the state that is established after the installation of the spray device on the liquid inlet pipe when the spray device is not in operation, i. if it is not flowed through by rinsing liquid. Accordingly, the operating state is to be understood as the state that occurs when the spray device flows through the rinsing liquid and is set in a rotational movement.
In einer weiteren vorteilhaften Ausgestaltung der Erfindung ist ein Endabschnitt des Flüssigkeitseinlaufrohrs innerhalb des Anschlussstutzens angeordnet und der Endabschnitt und der Anschlussstutzen ist mit einem ringförmig umlaufenden Stützflansch versehen, mit dem die Einführtiefe des Endabschnitts in den Anschlussstutzen begrenzt wird. Dadurch ist ein Austritt von Spülflüssigkeit an der Lagerstelle zwischen Anschlussstutzen und Endabschnitt weitgehend vermieden. Zusätzlich oder unabhängig hiervon kann der Stützflansch als Flüssigkeits- und/oder Schmutzabweiser dienen, der z.B. von oben nach unten abtropfende Spülflüssigkeit oder herunterfallende Schmutzteilchen von der erfindungsgemäßen Lagerstelle weitgehend fernhält.In a further advantageous embodiment of the invention, an end portion of the liquid inlet pipe is disposed within the connecting piece and the end portion and the connecting piece is provided with an annular peripheral support flange, with which the insertion depth of the end portion is limited in the connecting piece. As a result, leakage of rinsing liquid at the bearing point between the connecting piece and end portion is largely avoided. Additionally or independently thereof, the support flange may serve as a liquid and / or dirt deflector, e.g. From top to bottom dripping rinsing fluid or falling debris from the bearing point of the invention largely keeps away.
Das Auftreten einer Leckage wird insbesondere dann weitgehend vermieden, wenn der Endabschnitt des Flüssigkeitseinlaufrohrs an seinem Außenumfang eine Mehrzahl von ringförmig umlaufenden Rippen aufweist.The occurrence of leakage is largely avoided in particular when the end section of the liquid inlet pipe has a plurality of annular circumferential ribs on its outer circumference.
Wenn außerdem die Stützflansche durch die Magnetkraft in der Montageendposition axial gegeneinander gepresst werden, ist eine besonders einfache und sichere Montage der Sprüheinrichtung am Flüssigkeitseinlaufrohr gewährleistet.In addition, when the support flanges are axially pressed against each other by the magnetic force in the final assembly position, a particularly simple and secure installation of the spray is ensured at the liquid inlet pipe.
Der Endabschnitt des Flüssigkeitseinlaufrohrs weist nach einer vorteilhaften Weiterbildung der Erfindung an seinem Außenumfang eine oder mehrere, insbesondere eine Mehrzahl von ringförmig umlaufenden Rippen aufweist. Diese stehen vorzugsweise mit ihren freien Enden in radialer Richtung nach außen vom Endabschnitt oberhalb dessen Ringmagneten ab. Je zwei in axialer Richtung aufeinanderfolgende Rippen weisen voneinander in axialer Erstreckung der Drehachse betrachtet einen Höhenabstand voneinander auf. Die Rippen dienen dazu, für den außen den Endabschnitt umgebenden Anschlussstutzen der Sprüheinrichtung, insbesondere des rotierbar gelagerten Sprüharms eine radiale Abstützung bzw. Führung, d.h. ein Radiallager bereitzustellen. Zusätzlich oder unabhängig hiervon kann mit Hilfe der Rippen insbesondere auch das Auftreten einer Leckage an der Lagerstelle zwischen Sprüheinrichtung und Flüssigkeitseinlaufrohr weitgehend vermieden werden.The end portion of the liquid inlet pipe has according to an advantageous development of the invention on its outer periphery one or more, in particular a plurality of annular circumferential ribs. These are preferably with their free ends in the radial direction outwardly from the end portion above the ring magnet from. Each two consecutive ribs in the axial direction have a height distance from one another viewed in the axial extent of the axis of rotation. The ribs serve for the connection of the spraying device, in particular of the rotatably mounted spray arm, surrounding the end section to the outside, a radial support or guidance, i. to provide a radial bearing. In addition or independently thereof, the occurrence of leakage at the bearing point between the spraying device and the liquid inlet pipe can be largely avoided with the aid of the ribs.
Wenn außerdem die Stützflansche von Einlaufrohr und Anschlussstutzen durch die Magnetkraft in der Montageendposition axial gegeneinander gepresst werden, ist eine besonders einfache und sichere Montage der Sprüheinrichtung am Flüssigkeitseinlaufrohr sichergestellt.In addition, if the support flanges of the inlet pipe and connecting piece are pressed axially against each other by the magnetic force in the final assembly position, a particularly simple and secure installation of the sprayer is ensured at the liquid inlet pipe.
Die vorstehend erläuterten und/oder in den Unteransprüchen wiedergegebenen vorteilhaften Aus- und Weiterbildungen der Erfindung können dabei - außer z. B. in den Fällen eindeutiger Abhängigkeiten oder unvereinbarer Alternativen - einzeln oder aber auch in beliebiger Kombination miteinander zur Anwendung kommen.The above-explained and / or reproduced in the subclaims advantageous embodiments and refinements of the invention can - in addition to z. B. in cases of clear dependencies or incompatible alternatives - individually or in any combination with each other.
Die Erfindung und ihre vorteilhaften Aus- und Weiterbildungen sowie deren Vorteile werden nachfolgend anhand von Zeichnungen näher erläutert. Es zeigen, jeweils in einer schematischen Prinzipskizze:
- Fig. 1 bis 4
- jeweils eine an einem Flüssigkeitseinlaufrohr mit unterschiedlichen Magnetanordnungen gelagerte Sprüheinrichtung gemäß der Erfindung in einem teilweisen Längsschnitt in einer perspektivischen Darstellung,
- Fig. 5
- eine weitere alternative Ausgestaltung einer Magnetanordnung zur Lagerung der Sprüheinrichtung in einem schematischen Teilschnitt, und
- Fig. 6
- eine perspektivische Darstellung einer alternativen Ausführungsform der Lagerung einer Sprüheinrichtung gemäß der Erfindung in einem teilweisen Längsschnitt.
- Fig. 1 to 4
- each one mounted on a liquid inlet pipe with different magnet arrangements sprayer according to the invention in a partial longitudinal section in a perspective view,
- Fig. 5
- a further alternative embodiment of a magnet assembly for mounting the spray in a schematic partial section, and
- Fig. 6
- a perspective view of an alternative embodiment of the storage of a spray device according to the invention in a partial longitudinal section.
In den folgenden Figuren sind einander entsprechende Teile mit denselben Bezugszeichen versehen. Dabei sind nur diejenigen Bestandteile einer Geschirrspülmaschine mit Bezugszeichen versehen und erläutert, welche für das Verständnis der Erfindung erforderlich sind. Es versteht sich von selbst, dass die erfindungsgemäße Geschirrspülmaschine weitere Teile und Baugruppen umfassen kann.In the following figures, corresponding parts are provided with the same reference numerals. In this case, only those components of a dishwasher are provided with reference numerals and explained, which are necessary for the understanding of the invention. It goes without saying that the dishwasher according to the invention can comprise further parts and assemblies.
Gemäß
Der Anschlussstutzen 10 ist mit einem radialen Spiel außen auf dem Endabschnitt 12 gelagert, um eine reibungsarme Drehbewegung der Sprüheinrichtung 2 zu ermöglichen. An seinem Außenumfang ist der Endabschnitt 12 mit ringförmig umlaufenden Rippen 17 versehen, deren Außendurchmesser geringfügig kleiner ist als der Innendurchmesser des Anschlussstutzens 10. Diese dienen als Radiallager bzw. als Radialführung für den den Endabschnitt 12 außen umgebenden Anschlussstutzen 10. Der sich durch das radiale Spiel bei exakt zentrischer Anordnung ergebende Ringspalt zwischen den Rippen 17 und dem Anschlussstutzen 10 ist schmal, um ein Austreten von Spülflüssigkeit W weitestgehend zu minimieren.The connecting
Die Sprüheinrichtung 2 ist am Flüssigkeitseinlaufrohr 8 mit einer Permanentmagnetanordnung 20a fixiert, die aus zwei Ringmagneten 22a, 24a besteht. Diese sind im Anschlussstutzen 10 sowie im Endabschnitt 12 angeordnet. Im Einzelnen ist der Ringmagnet 22a in einer Nische bzw. einer Abstufung 18 in der Innenwandung des Anschlussstutzens 10 angebracht, während der Ringmagnet 24a auf einem unteren, endseitigen, radial nach außen frei abstehenden Flanschring des Endabschnitts 12 montiert ist. Er wird von der untersten der Rippen 17 von oben abgedeckt und in der Ringnut zwischen der untersten Rippe und dem Flanschring eingefasst. Im Anschlussstutzen 10 und im Endabschnitt 12 befinden sich also zweckmäßigerweise ringförmig umlaufende, im Querschnitt rechteckförmige Nuten oder Ausnehmungen 18 bzw. 19, in denen die Ringmagneten 22a, 24a angeordnet sind. Sie sind in radialer Richtung sowie in axialer Richtung (bezogen auf die Drehachse 6) gegeneinander versetzt angeordnet. Im dargestellten Ausführungsbeispiel weisen die Ringmagneten 22a, 24a jeweils eine radiale Polung auf. Die radialen Polungen sind entgegengesetzt zueinander gerichtet, so dass sich die Ringmagnete 22a, 24a aufgrund ihres axialen Versatzes zueinander in axialer Richtung abstoßen. D.h., dass die zwischen den Ringmagneten 22a, 24a wirkende magnetische Kraft bei axial versetzter und zentrischer, d. h. um die Drehachse 6 koaxialer Anordnung der Ringmagnete 22a, 24a parallel zur Drehachse 6 gerichtet ist. Der Ringmagnet 22a des Anschlussstutzens 10 liegt dabei in radialer Richtung betrachtet auf einer weiter außen liegenden Kreisbahn als der Ringmagnet 24a des Endstücks 12. Von oben in Draufsicht betrachtet umgibt der äußere Ringmagnet 22a den inneren Ringmagneten 24a. In der Montageendposition, in der der Stützflansch 14 auf der flanschartig verbreiterten Stirnfläche 16 aufliegt, befindet sich der im Anschlussstutzen 10 angeordnete Ringmagnet 22a zwischen dem im Endabschnitt 12 angeordneten Ringmagneten 24a und dem Stützflansch 14, so dass die zwischen den Ringmagneten 22a und 24a wirkende magnetische Abstoßungskraft den Anschlussstutzen 10 gegen den Stützflansch 14 drückt, das als Axialanschlag dient. Diese magnetische Kraft ist dabei so dimensioniert, dass sie größer ist als die im Betrieb auftretenden, auf die Sprüheinrichtung 2 entgegen der magnetischen Kraft in Richtung der Drehachse 6 wirkenden Kräfte, um die Sprüheinrichtung 2 am Flüssigkeitseinlaufrohr 8 zu fixieren bzw. zu halten. Diese Kräfte setzen sich aus dem Gewicht der Sprüheinrichtung 2 sowie aus hydraulischen Kräften zusammen, die von der in die Sprüheinrichtung 2 ein- und aus dieser ausströmenden Spülflüssigkeit W erzeugt werden, wobei sich Gewicht und hydraulische Kräfte addieren, wenn die Sprüheinrichtung 2 unterhalb des Flüssigkeitseinlaufrohres 8 angeordnet ist. Im Betriebszustand wird die Auflagekraft zwischen dem Stützflansch 14 und der Stirnfläche 16 durch die von der Spülflüssigkeit W ausgeübten hydraulischen Kräfte verringert, so dass entweder die Kraft, mit der die Stirnfläche 16 gegen den Stützflansch 14 gepresst wird und dementsprechend die Reibungskraft verringert ist, oder sich bei geeigneter Dimensionierung eine schwimmende Lagerung einstellen kann, bei der zwischen Stützflansch 14 und Stirnfläche 16 ein kleiner Spalt entsteht.The
In der Sprüheinrichtung 2 ist auf der der Mündungsöffnung 26 des Anschlussstutzens 10 gegenüberliegenden Wand 27, hier im Ausführungsbeispiel auf der Innenwandung der Unterschale der Sprüheinrichtung 2, insbesondere des Sprüharms, ein Strömungsleitkörper 28 angeordnet, der die aus dem Endabschnitt 12 des Flüssigkeitseinlaufrohrs 8 in die Sprüheinrichtung 2 einströmende Spülflüssigkeit W in zwei Teilströme aufteilt und ineinander entgegengesetzte, parallel zur Längsachse 4 der Sprüheinrichtung 2 orientierte Richtungen umlenkt, so dass sie in die mit Austrittsöffnungen 34 versehenen Sprüharme 36 bzw. 38 der Sprüheinrichtung 2 eintritt. Der Strömungsleitkörper 28 ist durch eine quer zu Längsachse 4 verlaufende Rippe gebildet, deren seitliche Flanken 40 eine Anströmschräge für die aus dem Flüssigkeitseinlaufrohr 8 in die Sprüheinrichtung 2 austretende Spülflüssigkeit W bilden und diese mit nur geringen hydraulischen Verlusten zu den Sprüharmen 36, 38 umlenken. Da der Strömungsleitkörper 28 an der Sprüheinrichtung 2 angeordnet ist und sich mit dieser mitdreht, ist bei jeder Drehposition der Sprüheinrichtung 2 eine optimale, hydraulisch verlustarme Umlenkung in die Sprüharme 36, 38 gewährleistet.In the
Da die Lagerung der Sprüheinrichtung 2 ausschließlich durch die zwischen dem Anschlussstutzen 10 und dem Endabschnitt 12 wirkenden magnetischen Kräfte erfolgt, ist es abweichend zu im Stand der Technik bekannten Ausführungsformen nicht mehr erforderlich, dass der Endabschnitt 12 die Sprüheinrichtung 2 durchsetzt und die dem Flüssigkeitseinlaufrohr 8 gegenüberliegende Wand 27 der Sprüheinrichtung 2 hintergreift. Dadurch kann das Unterteil der Sprüheinrichtung 2 wie in
Im Ausführungsbeispiel gemäß
Im Ausführungsbeispiel gemäß
Bei dem in
In den
Im Ausführungsbeispiel der
Alternativ zu der in
Anstelle von Ringmagneten mit identischer oder entgegengesetzter Axialpolung können alternativ hierzu auch Ringmagnete mit entgegengesetzt gerichteter Radialpolung verwendet werden. Zweckmäßigerweise liegt dabei der z. B. in der Radialanordnung von
Optional können auch Ringmagnete verwendet werden, die in der gleichen Richtung radial gepolt sind, wie dies in der Anordnung von
In den Ausführungsbeispielen ist der Endabschnitt 12 des Flüssigkeitseinlaufrohres 8 im Anschlussstutzen 10 der Sprüheinrichtung 2 gelagert. Diese Anordnung hat den Vorteil, dass durch einen zur reibungsarmen Lagerung des Anschlussstutzens 10 erforderlichen Spalt zwischen Endabschnitt 12 und Anschlussstutzen 10 praktisch keine Spülflüssigkeit austritt. Grundsätzlich ist es aber auch möglich, durch entsprechend kleine Toleranzen den Spalt zu minimieren und den Anschlussstutzen im Endabschnitt zu lagern.In the exemplary embodiments, the
In den dargestellten Ausführungsbeispielen weisen jeweils die Ringmagnete 22a-e sowie jeweils die Ringmagnete 24a-e dieselbe Bauhöhe und dieselbe Breite bzw. dieselbe radiale Erstreckung auf. Grundsätzlich können diese in ihren Abmessungen aber auch voneinander abweichen.In the exemplary embodiments illustrated, the
Die erfindungsgemäße Sprüheinrichtung 2 kann alternativ zu den in
- 2 Sprüheinrichtung2 spraying device
- 4 Längsachse4 longitudinal axis
- 6 Drehachse6 axis of rotation
- 8 Flüssigkeitseinlaufrohr8 fluid inlet pipe
- 10 Anschlussstutzen10 connecting pieces
- 12 Endabschnitt12 end section
- 14 Stützflansch14 support flange
- 16 Stirnfläche16 face
- 17 Rippe17 rib
- 18, 19 Ausnehmung18, 19 recess
- 20a-e Permanentmagnetanordnung20a-e permanent magnet arrangement
- 22a-e, 24a-e Ringmagnet22a-e, 24a-e ring magnet
- 26 Mündungsöffnung26 mouth opening
- 27 Wand27 wall
- 28 Strömungsleitkörper28 flow guide
- 30, 32 Teilstrom30, 32 partial flow
- 34 Austrittsöffnung34 outlet opening
- 36 ,38 Sprüharm36, 38 spray arm
- 40 Flanke40 flank
- 42 Ausnehmung42 recess
- 44 Rippe44 rib
- W SpülflüssigkeitW rinsing fluid
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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PL11185089T PL2446799T3 (en) | 2010-10-26 | 2011-10-13 | Dishwasher |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010042961 DE102010042961A1 (en) | 2010-10-26 | 2010-10-26 | dishwasher |
Publications (3)
Publication Number | Publication Date |
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EP2446799A2 true EP2446799A2 (en) | 2012-05-02 |
EP2446799A3 EP2446799A3 (en) | 2013-07-03 |
EP2446799B1 EP2446799B1 (en) | 2017-12-27 |
Family
ID=44772948
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EP11185089.7A Active EP2446799B1 (en) | 2010-10-26 | 2011-10-13 | Dishwasher |
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EP (1) | EP2446799B1 (en) |
DE (1) | DE102010042961A1 (en) |
PL (1) | PL2446799T3 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11026555B2 (en) | 2015-12-21 | 2021-06-08 | Electrolux Appliances Aktiebolag | Dishwasher comprising a wash arm arrangement |
US11191417B2 (en) | 2016-07-08 | 2021-12-07 | Electrolux Appliances Aktiebolag | Wash arm assembly |
US11464391B2 (en) | 2017-10-31 | 2022-10-11 | Electrolux Appliances Aktiebolag | Spray arm assembly |
US11612299B2 (en) | 2017-10-31 | 2023-03-28 | Electrolux Appliances Aktiebolag | Wash arm assembly |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1115659A (en) * | 1965-11-22 | 1968-05-29 | Electrolux Ltd | Coupling device for the working and the driving members of a floor polisher |
DE4020899A1 (en) * | 1990-06-30 | 1992-01-02 | Licentia Gmbh | Domestic dishwasher - has devices to prevent malfunction arising from incorrect loading of crockery |
DK1346680T3 (en) * | 1991-12-20 | 2006-07-03 | Fisher & Paykel Appliances Ltd | dishwasher |
DE102009006163A1 (en) * | 2009-01-26 | 2010-07-29 | Meiko Maschinenbau Gmbh & Co. Kg | Cleaning device for cleaning tablewares in e.g. industrial application, has cleaning nozzle rotatably mounted and including pivot bearing designed such that inner surface slides on outer surface by rotating bearing |
EP2215952A1 (en) * | 2009-02-09 | 2010-08-11 | Electrolux Home Products Corporation N.V. | Spray arm assembly for a dishwasher |
-
2010
- 2010-10-26 DE DE201010042961 patent/DE102010042961A1/en not_active Withdrawn
-
2011
- 2011-10-13 EP EP11185089.7A patent/EP2446799B1/en active Active
- 2011-10-13 PL PL11185089T patent/PL2446799T3/en unknown
Non-Patent Citations (1)
Title |
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None |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11026555B2 (en) | 2015-12-21 | 2021-06-08 | Electrolux Appliances Aktiebolag | Dishwasher comprising a wash arm arrangement |
US11191417B2 (en) | 2016-07-08 | 2021-12-07 | Electrolux Appliances Aktiebolag | Wash arm assembly |
US11464391B2 (en) | 2017-10-31 | 2022-10-11 | Electrolux Appliances Aktiebolag | Spray arm assembly |
US11612299B2 (en) | 2017-10-31 | 2023-03-28 | Electrolux Appliances Aktiebolag | Wash arm assembly |
Also Published As
Publication number | Publication date |
---|---|
PL2446799T3 (en) | 2018-06-29 |
EP2446799B1 (en) | 2017-12-27 |
EP2446799A3 (en) | 2013-07-03 |
DE102010042961A1 (en) | 2012-04-26 |
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