EP3266360A1 - Dishwasher with sensor unit for determining rotation of a spray arm - Google Patents
Dishwasher with sensor unit for determining rotation of a spray arm Download PDFInfo
- Publication number
- EP3266360A1 EP3266360A1 EP17178568.6A EP17178568A EP3266360A1 EP 3266360 A1 EP3266360 A1 EP 3266360A1 EP 17178568 A EP17178568 A EP 17178568A EP 3266360 A1 EP3266360 A1 EP 3266360A1
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- EP
- European Patent Office
- Prior art keywords
- working space
- dishwasher
- spray arm
- housing
- dishwasher according
- Prior art date
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- 238000011156 evaluation Methods 0.000 claims description 15
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- 238000001514 detection method Methods 0.000 description 3
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Images
Classifications
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- 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
- A47L15/14—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber
- A47L15/18—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with movably-mounted spraying devices
- A47L15/22—Rotary spraying devices
-
- 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
- A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
- A47L15/0049—Detection or prevention of malfunction, including accident prevention
-
- 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
- A47L15/14—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber
- A47L15/18—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with movably-mounted spraying devices
- A47L15/22—Rotary spraying devices
- A47L15/23—Rotary spraying devices moved by means of the sprays
-
- 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
- A47L15/44—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
- A47L15/4409—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants by tipping containers or opening their lids, e.g. with the help of a programmer
-
- 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
- A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
- A47L2401/06—Water supply, circulation or discharge information
-
- 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
- A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
- A47L2401/24—Spray arms status, e.g. detection of spray arm rotation
-
- 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
- A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
- A47L2401/30—Variation of electrical, magnetical or optical quantities
-
- 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
- A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
- A47L2501/02—Water discharge, e.g. opening or closure of discharge valve
-
- 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
- A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
- A47L2501/05—Drain or recirculation pump, e.g. regulation of the pump rotational speed or flow direction
-
- 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
- A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
- A47L2501/20—Spray nozzles or spray arms
-
- 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
- A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
- A47L2501/26—Indication or alarm to the controlling device or to the user
Definitions
- the invention relates to a dishwasher with a working space and a sensor according to the preamble of claim 1.
- Such a dishwasher is for example in the document DE 10034546 A1 described.
- the interior of a dishwasher is monitored by means of one or more radar sensors using the Doppler effect.
- This sensor is very expensive and therefore costly.
- so far no technically perfect function of such a dishwasher has been realized.
- the object of the invention is, starting from a dishwasher according to the preamble of claim 1 to propose a dishwasher with an improved program control.
- a dishwasher according to the invention with a sensor unit for detecting a spray arm movement in the working space is characterized in that it comprises at least one infrared transmitter and / or one infrared receiver.
- This sensor unit is at least partially in the housing of the device formed as an insert, which serves for the supply and metering of a working substance such as a cleaner, rinse aid, etc.
- a dosing device such a device is referred to as a dosing device.
- the terms “dishwasher”, “dishwasher” or “dishwasher” are also used in the following as synonymous terms as the terms “water jet” and “Laugenstrahl”.
- infrared light By the use of infrared light, a reliable and even under the ambient conditions in the working space of a dishwasher during operation largely trouble-free detection in particular the movement of the spray arm is possible. Due to the large range of an infrared beam and spray arms at a distance from the sensor unit or in an unfavorable position, for example, with regard to the angular orientation detectable.
- the operating principle of the sensor unit is based on the fact that infrared light emitted from an infrared transmitter, reflected in the working space and is detected by an infrared receiver again.
- an infrared beam may be reflected to the receiver via a stationary reflector located in the working space of the machine, detecting changes in the IR beam, eg in intensity, by a rotating spray arm, a device attached to the spray arm, or a stream of water or lye from the spray arm caused.
- a stationary reflector can be a separate component or an already existing device, e.g. an area of the wall of the working space can be used.
- a jet emitted by the IR transmitter is transmitted through the rotating spray arm or associated element, e.g. a region of the Sprüharmwand, a separate, attached to the spray arm reflector element, a water or Laugenstrahl a Sprüharmdüse, etc. reflected in the receiver. These reflections are therefore directly correlated with the rotation of the spray arm.
- the reflections and / or changes of reflections are to be detected significantly, especially if they take place in the vicinity of the transmitter and / or receiver, for example by a spray arm or water jet rotating directly past the transmitter and / or receiver.
- a reliably detectable reflection of the infrared light is ensured by the fact that at least one Sprüharmdüse is oriented such that the water jet or the liquor jet of the wash liquor at least partially crosses the beam path of the infrared light.
- the inventively desired reflections can be caused by the water or the alkali.
- the beam path of the infrared light is formed, for example by additional optical elements, that results in a focal point or at least one focusing zone, which is illuminated by said water or alkali stream.
- the desired reflection by the spray arm itself evoked.
- the arrangement and surface design of the spray arm can be provided accordingly.
- a spray arm at least in some areas may have a coating that is highly reflective for infrared light.
- the beam path of the infrared light or the position of the spray arm can be arranged relative to each other such that the spray arm crosses the beam path at least with its reflection zone.
- a beam path can be used which has a focal point or at least one focusing zone through which the spray arm is guided with its reflection zone.
- the spray arm is equipped with a special reflector for infrared light.
- Reflectors of this type may be designed, by mirror surfaces and / or by refraction of light, if appropriate with the additional use of optical elements, in such a way that incident infrared light is reflected in a targeted manner. In the visible range, such reflectors are also known by the term “cat's eye” or “Lüneburg lens”.
- a reflection angle can be provided, which takes into account the relative arrangement of the infrared receiver with respect to the infrared transmitter.
- the housing of the metering device which includes the sensor unit, designed watertight.
- the placement of the sensor unit in the housing of the already existing metering device facilitates the arrangement in the interior of the working space of the dishwasher.
- no additional opening in the inner wall or the door of the working space must be provided as a result, since the metering device is to be arranged anyway in such a recess of the inner wall.
- the housing is already water and in the known metering devices Well trained. All electrical control devices for the metering device, which are located inside the dishwasher door, are already protected by the design of the housing before the water or the flushing liquor according to the prior art.
- a sensor unit can be accommodated without major sealing problems advantageously within such a metering device, including, for example, an infrared transparent window is provided in the housing.
- a window can be easily realized by appropriate seals or by a solid connection, for example by welding or gluing reliably tight with the housing wall of the metering device.
- the additional arrangement of guide elements is further provided to keep running water away from the beam path of the infrared light after the passage of the spray arm. Rising water could cause reflections that produce unwanted spurious signals.
- guiding elements for example in the form of a canopy above the exit of the infrared light from the housing, for example above a passage window, it can be ensured that water trickling down is guided laterally around it.
- such guide elements are provided on the inner wall of the working space, whereby the entire that here device is protected against herrafinnendem water and thus the infrared beam path.
- the sensor unit in particular the infrared transmitter and / or receiver, is preferably arranged such that it does not lie directly in a water or lye jet of a spray arm nozzle. This also prevents interference due to unwanted reflections.
- the time sequence of the sensor signal is detected and an evaluation unit is provided in order to detect the periodicity or frequency of the sensor signal caused by the rotating spray arm.
- a periodic or frequency-dependent signal can be assumed. Due to the timing of the sensor signals with subsequent evaluation in an electronic evaluation unit can thus be evaluated selectively for periodic signals. By this measure, almost all non-periodically occurring interference signals are already filtered or suppressed.
- the speed or speed of the spray arm can then be determined. If no periodic signal can be detected, this is a sign for a stationary, but at least for a non-rotating spray arm.
- this can for example be brought to the display for an operator or else intervene in the control of the program sequence.
- an analog evaluation circuit is provided to detect the periodicity or frequency of the sensor signal caused by the rotating spray arm.
- a circuit can be realized, for example, using a so-called PPL (phase lock loop).
- PPL phase lock loop
- an oscillating input signal in a comparator or differential amplifier can be compared to the sensor signal and changes in the output voltage used to draw conclusions about proper rotation of a spray arm.
- various algorithms can furthermore be provided to analyze and exclude disturbing influences.
- an integration of the signal peaks that is to say the determination of the area covered by the signal for the detection and exclusion of error peaks.
- This error signals can be detected and excluded, which do not follow the timing and intensity of the reflections generated by the spray arm or the water or alkali beam. Threshold analysis may also be used instead of or in addition to other methods of error detection.
- FIG. 1 the dishwasher 1 with rinsing chamber 2 is shown schematically in section.
- the washing chamber 2 are in dish racks 3, 4 below each of which a spray arm 5, 6 is rotatably arranged.
- a dishwasher door 7 At the front of a dishwasher door 7 is rotatably mounted, as indicated by a rotation axis 8.
- a metering device 9 In the dishwasher door 7 is a metering device 9 for adding detergent.
- a sump container 10 which includes, for example, the usual filter and the drainage.
- FIG. 2 the arrangement of an infrared sensor unit 11 is illustrated in the metering device 9, which comprises an infrared transmitter 12 and an infrared receiver 13.
- the metering device 9 comprises in a conventional manner a flap 14 for closing a flushing agent chamber, an outlet opening 15 for the rinse aid dosage and a sight glass 16 and a refill opening 17 for the rinse aid.
- FIG. 1 indicated Inside the dishwasher door and the evaluation and control unit can be arranged, as in FIG. 1 indicated. At the in FIG. 1 indicated location of the evaluation and control unit 18, this can be directly connected to the necessary to operate the machine displays, buttons and other controls.
- FIG. 3 a metering device for installation in a dishwasher door according to the invention is shown, wherein a memory 1 is provided for receiving detergent. This detergent is fed during the cleaning phase of the dishwasher controlled in the cleaning room for the dishes. In this case, a lid 2 is opened, so that the cleaning agent from the memory 1 leak or can be rinsed out.
- a roof-shaped projection 20 serves as a guide to redirect herabinnendes water or alkali.
- the infrared sensor unit 11 is installed by way of example on the edge of the housing 19 of the metering device.
- an infrared sensor signal is shown in its time sequence.
- the horizontal axis of the diagram shows the time t while the vertical axis represents the intensity I.
- the sensor signal S shows various peaks P1 to P5, which are arranged periodically over time.
- the respective times t1 to t5 are marked with corresponding arrows.
- the diagram according to FIG. 4 shows by way of example two further peaks S1 and S2, which represent spurious signals that may be caused for example by unwanted reflections on dripping water or the like.
- interference peaks S1 and S2 can be detected and eliminated by suitable evaluation by means of the evaluation unit 18.
- This evaluation can for example be designed such that only periodically recurring signals P1 to P5 are perceived as true sensor signals, non-periodic signals, however, as interference signals.
- Another way to detect the noise is, for example, to integrate the corresponding signal peaks over time, which mathematically determines the area covered by the peaks. Since an integral value within a certain interval is to be expected in the case of regular sensor signals, this makes it possible to detect and exclude other signals, such as, for example, the line-shaped interference signals S1 and S2.
- exemplary methods or other methods for detecting interference signals may be used alone or in combination with each other.
- a malfunction for example a standing or too slowly rotating spray arm, is detected on the basis of the sensor signal, this can be indicated in a display of the operator.
- the dishwasher according to the invention can also be controlled depending on the sensor signal.
- the amount of water and / or the pump pressure can be varied.
- controllable nozzles with regard to the beam alignment and / or beam shape are also conceivable.
Landscapes
- Washing And Drying Of Tableware (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
Es wird ein Geschirrspüler mit einem Arbeitsraum, mit wenigstens einem drehbar im Arbeitsraum angeordneten Sprüharm und mit einer Dosiervorrichtung zur Zufuhr und Dosierung eines Stoffes, wie Reiniger, Klarspüler, usw. in den Arbeitsraum, die als Einsatzteil mit einem Gehäuse zum Einsetzen in eine Ausnehmung einer Innenwand des Arbeitsraums, beispielsweise in der Tür des Arbeitsraums ausgebildet ist, und mit einer Sensoreinheit zur Erkennung einer Sprüharmbewegung im Arbeitsraum des Geschirrspülers, die wenigstens teilweise in einem Gehäuse der Dosiervorrichtung angeordnet ist, vorgeschlagen, wobei die Sensoreinheit 11 wenigstens einen Infrarotsender 12 und/oder einen Infrarotempfänger 13 umfasst.It is a dishwasher with a working space, with at least one rotatably arranged in the working chamber spray arm and with a metering device for feeding and dosing a substance such as cleaner, rinse aid, etc. in the working space, which serves as an insert with a housing for insertion into a recess of a Inner wall of the working space, for example, in the door of the working space is formed, and with a sensor unit for detecting a Sprüharmbewegung in the working space of the dishwasher, which is at least partially disposed in a housing of the metering proposed, wherein the sensor unit 11 at least one infrared transmitter 12 and / or an infrared receiver 13 comprises.
Description
Die Erfindung betrifft einen Geschirrspüler mit einem Arbeitsraum und einem Sensor nach dem Oberbegriff des Anspruchs 1.The invention relates to a dishwasher with a working space and a sensor according to the preamble of
Ein derartiger Geschirrspüler ist beispielsweise in der Druckschrift
Aufgabe der Erfindung ist es, ausgehend von einem Geschirrspüler gemäß dem Oberbegriff des Anspruchs 1 einen Geschirrspüler mit einer verbesserten Programmsteuerung vorzuschlagen.The object of the invention is, starting from a dishwasher according to the preamble of
Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.This object is solved by the characterizing features of
Dementsprechend zeichnet sich ein erfindungsgemäßer Geschirrspüler mit einer-Sensoreinheit zu Erkennung einer Sprüharmbewegung im Arbeitsraum dadurch aus, dass sie wenigstens einen Infrarotsender und/oder einen Infrarotempfänger umfasst.Accordingly, a dishwasher according to the invention with a sensor unit for detecting a spray arm movement in the working space is characterized in that it comprises at least one infrared transmitter and / or one infrared receiver.
Diese Sensoreinheit ist wenigstens teilweise in dem Gehäuse der als Einsatzteil ausgebildeten Vorrichtung, die zur Zufuhr und Dosierung eines Arbeitsstoffes wie eines Reiniger, Klarspülers usw. dient.This sensor unit is at least partially in the housing of the device formed as an insert, which serves for the supply and metering of a working substance such as a cleaner, rinse aid, etc.
Im Folgenden wird eine solche Vorrichtung als Dosiervorrichtung bezeichnet. Weiterhin werden die Begriffe "Spülmaschine", "Geschirrspülmaschine" oder "Geschirrspüler" im Folgenden ebenso als synonyme Begriffe verwendet wie die Begriffe "Wasserstrahl" und "Laugenstrahl".In the following, such a device is referred to as a dosing device. Furthermore, the terms "dishwasher", "dishwasher" or "dishwasher" are also used in the following as synonymous terms as the terms "water jet" and "Laugenstrahl".
Mit Hilfe einer erfindungsgemäßen Sensoreinheit ist es möglich, Programmabläufe während des Betriebs zu kontrollieren. Insbesondere kann damit erfasst werden, ob und welcher Sprüharm ordnungsgemäß rotiert oder ein Fehlverhalten aufweist.With the aid of a sensor unit according to the invention, it is possible to control program sequences during operation. In particular, it can thus be detected whether and which spray arm rotates properly or exhibits a wrong behavior.
Durch die Verwendung von Infrarotlicht ist eine zuverlässige und auch unter den Umgebungsbedingungen im Arbeitsraum einer Geschirrspülmaschine während des Betriebs weitgehend störungsfreie Erfassung insbesondere der Bewegung des Sprüharms möglich. Durch die große Reichweite eines Infrarot-Strahles sind auch Sprüharme in weiterer Entfernung von der Sensoreinheit oder in ungünstiger Lage, beispielsweise im Hinblick auf die Winkelorientierung, detektierbar.By the use of infrared light, a reliable and even under the ambient conditions in the working space of a dishwasher during operation largely trouble-free detection in particular the movement of the spray arm is possible. Due to the large range of an infrared beam and spray arms at a distance from the sensor unit or in an unfavorable position, for example, with regard to the angular orientation detectable.
Das Funktionsprinzip der Sensoreinheit basiert dabei darauf, dass Infrarotlicht von einem Infrarotsender abgestrahlt, im Arbeitsraum reflektiert und von einem Infrarotempfänger wieder detektiert wird.The operating principle of the sensor unit is based on the fact that infrared light emitted from an infrared transmitter, reflected in the working space and is detected by an infrared receiver again.
Zur Erkennung einer Sprüharmrotation kann beispielsweise ein Infrarotstrahl über einen stationär im Arbeitsraum der Maschine befindlichen Reflektor zum Empfänger reflektiert werden, wobei Änderungen des IR- Strahls z.B. in der Intensität, erfasst werden, die durch einen rotierenden Sprüharm, ein an dem Sprüharm befestigtes Bauelement oder durch einen Wasser- oder Laugenstrahl aus dem Sprüharm verursacht werden.For example, to detect a spray arm rotation, an infrared beam may be reflected to the receiver via a stationary reflector located in the working space of the machine, detecting changes in the IR beam, eg in intensity, by a rotating spray arm, a device attached to the spray arm, or a stream of water or lye from the spray arm caused.
Als stationärer Reflektor kann dabei ein separates Bauteil oder ein ohnehin vorhandenes Bauelement, z.B. ein Bereich der Wandung des Arbeitsraums verwendet werden.As a stationary reflector can be a separate component or an already existing device, e.g. an area of the wall of the working space can be used.
In einer anderen Ausführung der Erfindung wird ein vom IR-Sender ausgestrahlter Strahl durch den rotierenden Sprüharm oder ein damit verbundenes Element, z.B. einem Bereich der Sprüharmwand, einem separatem, am Sprüharm befestigten Reflektorelement, einem Wasser-oder Laugenstrahl einer Sprüharmdüse, etc. in den Empfänger reflektiert. Diese Reflexionen sind also unmittelbar mit der Rotation des Sprüharms korreliert.In another embodiment of the invention, a jet emitted by the IR transmitter is transmitted through the rotating spray arm or associated element, e.g. a region of the Sprüharmwand, a separate, attached to the spray arm reflector element, a water or Laugenstrahl a Sprüharmdüse, etc. reflected in the receiver. These reflections are therefore directly correlated with the rotation of the spray arm.
Die Reflexionen und/oder Änderungen von Reflexionen sind insbesondere dann signifikant zu erfassen, wenn diese in der Nähe des Senders und/oder Empfängers stattfinden, beispielsweise durch einen unmittelbar am Sender/und oder Empfänger vorbeidrehenden Sprüharm oder Wasserstrahl.The reflections and / or changes of reflections are to be detected significantly, especially if they take place in the vicinity of the transmitter and / or receiver, for example by a spray arm or water jet rotating directly past the transmitter and / or receiver.
In einer besonderen Ausführungsform der Erfindung wird für eine zuverlässig detektierbare Reflexion des Infrarotlichts dadurch gesorgt, dass wenigstens eine Sprüharmdüse derart ausgerichtet ist, dass der Wasserstrahl bzw. der Laugenstrahl der Waschlauge den Strahlengang des Infrarotlichts wenigstens teilweise kreuzt. Die erfindungsgemäß gewünschten Reflexionen können dabei durch das Wasser bzw. die Lauge hervorgerufen werden.In a particular embodiment of the invention, a reliably detectable reflection of the infrared light is ensured by the fact that at least one Sprüharmdüse is oriented such that the water jet or the liquor jet of the wash liquor at least partially crosses the beam path of the infrared light. The inventively desired reflections can be caused by the water or the alkali.
Vorzugsweise wird in einer solchen Ausführungsform der Strahlengang des Infrarotlichts so ausgebildet, beispielsweise durch zusätzliche optische Elemente, dass sich ein Brennpunkt oder zumindest eine Fokussierungszone ergibt, die von dem genannten Wasser-oder Laugenstrahl angestrahlt wird.Preferably, in such an embodiment, the beam path of the infrared light is formed, for example by additional optical elements, that results in a focal point or at least one focusing zone, which is illuminated by said water or alkali stream.
In einer anderen ebenfalls vorteilhaften Ausführungsform der Erfindung wird die gewünschte Reflexion durch den Sprüharm selbst hervorgerufen. Hierzu kann die Anordnung und Oberflächengestaltung des Sprüharms entsprechend vorgesehen werden. So kann beispielsweise ein Sprüharm wenigstens bereichsweise eine für Infrarotlicht gut reflektierende Beschichtung aufweisen. Weiterhin kann der Strahlengang des Infrarotlichts bzw. die Position des Sprüharms relativ zueinander derart angeordnet werden, dass der Sprüharm zumindest mit seiner Reflexionszone den Strahlengang kreuzt. Auch in dieser Ausführungsform kann vorteilhafter Weise ein Strahlengang verwendet werden, der einen Brennpunkt oder zumindest eine Fokussierungszone aufweist, durch die der Sprüharm mit seiner Reflexionszone geführt wird.In another likewise advantageous embodiment of the invention, the desired reflection by the spray arm itself evoked. For this purpose, the arrangement and surface design of the spray arm can be provided accordingly. Thus, for example, a spray arm at least in some areas may have a coating that is highly reflective for infrared light. Furthermore, the beam path of the infrared light or the position of the spray arm can be arranged relative to each other such that the spray arm crosses the beam path at least with its reflection zone. Also in this embodiment, advantageously, a beam path can be used which has a focal point or at least one focusing zone through which the spray arm is guided with its reflection zone.
In einer weiteren vorteilhaften Ausführungsform der Erfindung wird der Sprüharm mit einem speziellen Reflektor für Infrarotlicht ausgestattet. Derartige Reflektoren können durch Spiegelflächen und/oder durch Lichtbrechung gegebenenfalls unter zusätzlicher Verwendung optischer Elemente so ausgestaltet werden, dass einfallendes Infrarotlicht zielgerichtet reflektiert wird. Im sichtbaren Bereich sind derartige Reflektoren auch unter dem Begriff "Katzenauge" oder "Lüneburg-Linse" bekannt.In a further advantageous embodiment of the invention, the spray arm is equipped with a special reflector for infrared light. Reflectors of this type may be designed, by mirror surfaces and / or by refraction of light, if appropriate with the additional use of optical elements, in such a way that incident infrared light is reflected in a targeted manner. In the visible range, such reflectors are also known by the term "cat's eye" or "Lüneburg lens".
Mit derartigen Reflektoren kann insbesondere auch ein Reflexionswinkel vorgesehen werden, der die relative Anordnung des Infrarotempfängers in Bezug zum Infrarotsender berücksichtigt.With such reflectors, in particular, a reflection angle can be provided, which takes into account the relative arrangement of the infrared receiver with respect to the infrared transmitter.
Vorteilhafterweise wird das Gehäuse der Dosiervorrichtung, das die Sensoreinheit beinhaltet, wasserdicht ausgeführt. Die Unterbringung der Sensoreinheit im Gehäuse der ohnehin vorhandenen Dosierungsvorrichtung erleichtert dabei die Anordnung im Innern des Arbeitsraums der Spülmaschine. Zum einen muss hierdurch keine zusätzliche Öffnung in der Innenwand bzw. der Tür des Arbeitsraums vorgesehen werden, da die Dosiervorrichtung ohnehin in einer solchen Ausnehmung der Innenwand anzuordnen ist. Darüber hinaus ist bereits bei den bekannten Dosiervorrichtungen das Gehäuse wasser- und laugendicht ausgebildet. Sämtliche elektrischen Steuerorgane auch für die Dosiervorrichtung, die sich im Innern der Geschirrspülmaschinentür befinden, sind bereits nach dem Stand der Technik durch die Ausgestaltung des Gehäuses vor dem Wasser bzw. der Spüllauge geschützt.Advantageously, the housing of the metering device, which includes the sensor unit, designed watertight. The placement of the sensor unit in the housing of the already existing metering device facilitates the arrangement in the interior of the working space of the dishwasher. On the one hand, no additional opening in the inner wall or the door of the working space must be provided as a result, since the metering device is to be arranged anyway in such a recess of the inner wall. In addition, the housing is already water and in the known metering devices Well trained. All electrical control devices for the metering device, which are located inside the dishwasher door, are already protected by the design of the housing before the water or the flushing liquor according to the prior art.
Somit kann eine Sensoreinheit ohne größere Dichtprobleme vorteilhafter Weise innerhalb einer solchen Dosiervorrichtung untergebracht werden, wozu beispielsweise ein Infrarot durchlässiges Fenster im Gehäuse vorgesehen wird. Ein solches Fenster ist einfach durch entsprechende Dichtungen oder auch durch eine feste Verbindung, beispielsweise durch Verschweißen oder Verkleben zuverlässig dicht mit der Gehäusewandung der Dosiervorrichtung zu realisieren.Thus, a sensor unit can be accommodated without major sealing problems advantageously within such a metering device, including, for example, an infrared transparent window is provided in the housing. Such a window can be easily realized by appropriate seals or by a solid connection, for example by welding or gluing reliably tight with the housing wall of the metering device.
In einer vorteilhaften Ausführungsform der Erfindung wird weiterhin die zusätzliche Anordnung von Leitelementen vorgesehen, um abrinnendes Wasser nach dem Durchlauf des Sprüharms vom Strahlengang des Infrarotlichts fernzuhalten. Durch herabrinnendes Wasser könnten Reflexionen verursacht werden, die unerwünschte Störsignale liefern. Durch Leitelemente, beispielsweise in Form eines Vordaches oberhalb des Austritts des Infrarotlichts aus dem Gehäuse, beispielsweise oberhalb eines Durchtrittsfensters kann dafür gesorgt werden, dass herabrinnendes Wasser seitlich darum herumgeleitet wird.In an advantageous embodiment of the invention, the additional arrangement of guide elements is further provided to keep running water away from the beam path of the infrared light after the passage of the spray arm. Rising water could cause reflections that produce unwanted spurious signals. By guiding elements, for example in the form of a canopy above the exit of the infrared light from the housing, for example above a passage window, it can be ensured that water trickling down is guided laterally around it.
In einer anderen Ausführungsform der Erfindung werden derartige Leitelemente an der Innenwand des Arbeitsraums vorgesehen, womit die gesamte dass hier Vorrichtung vor herabrinnendem Wasser und somit auch der Infrarot-Strahlengang geschützt wird.In another embodiment of the invention, such guide elements are provided on the inner wall of the working space, whereby the entire that here device is protected against herrafinnendem water and thus the infrared beam path.
Weiterhin wird bevorzugt die Sensoreinheit, insbesondere der Infrarotsender und/oder -empfänger derart angeordnet, dass sie nicht unmittelbar in einem Wasser- bzw. Laugenstrahl einer Sprüharmdüse liegen. Auch hierdurch werden Störsignale durch unerwünschte Reflexionen vermieden.Furthermore, the sensor unit, in particular the infrared transmitter and / or receiver, is preferably arranged such that it does not lie directly in a water or lye jet of a spray arm nozzle. This also prevents interference due to unwanted reflections.
In einer besonderen Ausführungsform der Erfindung wird der Zeitablauf des Sensorsignals erfasst und eine Auswerteeinheit vorgesehen, um die Periodizität bzw. Frequenz des vom drehenden Sprüharm hervorgerufenen Sensorsignals zu erfassen.In a particular embodiment of the invention, the time sequence of the sensor signal is detected and an evaluation unit is provided in order to detect the periodicity or frequency of the sensor signal caused by the rotating spray arm.
Da erfindungsgemäß die Drehbewegung des Sprüharms zu überwachen ist, kann von einem periodischen oder frequenzabhängigen Signal ausgegangen werden. Durch die zeitliche Erfassung der Sensorsignale mit anschließender Auswertung in einer elektronischen Auswerteeinheit kann somit selektiv nach periodischen Signalen ausgewertet werden. Durch diese Maßnahme sind nahezu alle nicht periodisch auftretenden Störsignale bereits gefiltert bzw. unterdrückt.Since, according to the invention, the rotational movement of the spray arm is to be monitored, a periodic or frequency-dependent signal can be assumed. Due to the timing of the sensor signals with subsequent evaluation in an electronic evaluation unit can thus be evaluated selectively for periodic signals. By this measure, almost all non-periodically occurring interference signals are already filtered or suppressed.
Durch Bestimmung der Frequenz kann sodann die Drehzahl bzw. Geschwindigkeit des Sprüharms bestimmt werden. Sollte kein periodisches Signal detektierbar sein, so ist dies ein Zeichen für einen stillstehenden, zumindest jedoch für einen nicht freidrehenden Sprüharm.By determining the frequency, the speed or speed of the spray arm can then be determined. If no periodic signal can be detected, this is a sign for a stationary, but at least for a non-rotating spray arm.
Im Falle einer solchen Fehlfunktion des Sprüharms kann dies beispielsweise zur Anzeige für eine Bedienperson gebracht werden oder aber auch in die Steuerung des Programmablaufs eingegriffen werden.In the case of such a malfunction of the spray arm, this can for example be brought to the display for an operator or else intervene in the control of the program sequence.
In einer besonderen Ausführungsform der Erfindung wird eine analoge Auswerteschaltung vorgesehen, um die Periodizität bzw. Frequenz des vom drehenden Sprüharm hervorgerufenen Sensorsignals zu detektieren. Eine solche Schaltung kann beispielsweise unter Verwendung eines sogenannten PPL (phase lock loop) realisiert werden. So kann ein oszillierendes Eingangssignal in einem Komparator oder Differenzenverstärker mit dem Sensorsignal verglichen werden und Änderungen der Ausgangsspannung zu Rückschlüssen auf eine ordnungsgemäße Rotation eines Sprüharms herangezogen werden. Auch wenn technisch zur Auswertung eines erfindungsgemäßen Sensorsignals digitale Bauelemente ohne weiteres zur Verfügung stehen, kann der Einsatz einer analogen Schaltung unter Kostengesichtspunkten bei entsprechenden Stückzahlen die technisch vorteilhaftere Lösung bieten. Auch die Kombination einer analogen Schaltung mit einer digitalen Auswertung, die z.B. nur bei fehlerhafter Ausgangsspannung der analogen Schaltung eingreift, wäre denkbar.In a particular embodiment of the invention, an analog evaluation circuit is provided to detect the periodicity or frequency of the sensor signal caused by the rotating spray arm. Such a circuit can be realized, for example, using a so-called PPL (phase lock loop). Thus, an oscillating input signal in a comparator or differential amplifier can be compared to the sensor signal and changes in the output voltage used to draw conclusions about proper rotation of a spray arm. Even if, for the evaluation of a sensor signal according to the invention, digital components are readily available, it is possible the use of an analog circuit in terms of cost with appropriate quantities provide the more technically advantageous solution. The combination of an analog circuit with a digital evaluation, which intervenes only in case of faulty output voltage of the analog circuit, for example, would be conceivable.
Im Falle einer digitalen Auswerteeinheit können weiterhin verschiedene Algorithmen vorgesehen werden, um Störeinflüsse zu analysieren und auszuschließen. Anstelle oder in Kombination zu der Verwendung der Periodizität wie oben angeführt kann beispielsweise auch eine Integration der Signalpeaks, das heißt die Bestimmung der durch das Signal abgedeckten Fläche zur Erkennung und zum Ausschluss von Fehlerpeaks herangezogen werden. Hiermit können Fehlersignale erkannt und ausgeschlossen werden, die nicht dem Zeitablauf und der Intensität der durch den Sprüharm bzw. dem Wasser-oder Laugenstrahl erzeugten Reflexionen folgen. Auch eine Schwellwertanalyse kann anstelle oder zusätzlich zu anderen Methoden der Fehlererkennung eingesetzt werden.In the case of a digital evaluation unit, various algorithms can furthermore be provided to analyze and exclude disturbing influences. Instead of or in combination with the use of the periodicity as stated above, it is also possible, for example, to use an integration of the signal peaks, that is to say the determination of the area covered by the signal for the detection and exclusion of error peaks. This error signals can be detected and excluded, which do not follow the timing and intensity of the reflections generated by the spray arm or the water or alkali beam. Threshold analysis may also be used instead of or in addition to other methods of error detection.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird anhand der Figuren nachfolgend näher erläutert.An embodiment of the invention is illustrated in the drawing and will be explained in more detail with reference to FIGS.
Im Einzelnen zeigen
-
einen schematischen Querschnitt durch eine Spülmaschine mit Sprüharm,Figur 1 -
eine Draufsicht auf dieFigur 2Türinnenseite einer 8 Spülmaschine, -
eine Darstellung einer Dosiervorrichtung undFigur 3 -
ein Beispiel für ein Sensorsignal, dass Mittels. Infrarotsender und/oder Infrarotempfänger messbar ist.Figur 4
-
FIG. 1 a schematic cross section through a dishwasher with spray arm, -
FIG. 2 a top view of the inside of the door of adishwasher 8, -
FIG. 3 an illustration of a metering device and -
FIG. 4 an example of a sensor signal that means. Infrared transmitter and / or infrared receiver is measurable.
In
An der Vorderseite ist eine Spülmaschinentür 7 drehbar angebracht, wie durch eine Drehachse 8 angedeutet ist. In der Spülmaschinentür 7 befindet sich eine Dosiervorrichtung 9 zur Spülmittelzugabe.At the front of a
Im Boden der Spülmaschine 1 befindet sich ein Sumpfbehälter 10, der beispielsweise die üblichen Filter und den Wasserabfluss beinhaltet.In the bottom of the
In
Im Inneren der Spülmaschinentür kann auch die Auswerte- und Steuereinheit angeordnet werden, wie in
In
Die Infrarot-Sensoreinheit 11 ist beispielhaft am Rand des Gehäuses 19 der Dosiervorrichtung eingebaut.The
In
Das Diagramm gemäß
Diese Störpeaks S1 und S2 können durch geeignete Auswertung mittels der Auswerteeinheit 18 erkannt und eliminiert werden. Diese Auswertung kann beispielsweise derart ausgestaltet sein, dass nur periodisch wiederkehrende Signale P1 bis P5 als echte Sensorsignale, nichtperiodische Signale hingegen als Störsignale wahrgenommen werden. Eine andere Möglichkeit, die Störsignale zu erkennen, besteht beispielsweise darin, die entsprechenden Signalpeaks über die Zeit zu integrieren, wodurch mathematisch die Fläche, die durch die Peaks überdeckt wird, bestimmt wird. Da bei regulären Sensorsignalen ein Integralwert innerhalb eines bestimmten Intervalls zu erwarten ist, können hierdurch anderweitige Signale, wie beispielsweise die linienförmigen Störsignale S1 und S2 erkannt und ausgeschlossen werden.These interference peaks S1 and S2 can be detected and eliminated by suitable evaluation by means of the
Diese beispielhaften Methoden oder auch weitere Methoden zur Erkennung von Störsignalen, beispielsweise über Schwellenwerte in der Intensität oder dergleichen, können alleine oder auch in Kombination zueinander Anwendung finden.These exemplary methods or other methods for detecting interference signals, for example via thresholds in intensity or the like, may be used alone or in combination with each other.
Wird auf der Grundlage des Sensorsignals eine Fehlfunktion, beispielsweise ein stehender oder zu langsam drehender Sprüharm_erkannt, so kann dies in einer Anzeige der Bedienperson angezeigt werden.If a malfunction, for example a standing or too slowly rotating spray arm, is detected on the basis of the sensor signal, this can be indicated in a display of the operator.
Die erfindungsgemäße Spülmaschine kann auch abhängig vom Sensorsignal gesteuert werden. So kann beispielsweise die Wassermenge und/oder der Pumpendruck variiert werden. Gegebenenfalls sind auch steuerbare Düsen hinsichtlich der Strahlausrichtung und/oder Strahlform denkbar.The dishwasher according to the invention can also be controlled depending on the sensor signal. For example, the amount of water and / or the pump pressure can be varied. Optionally, controllable nozzles with regard to the beam alignment and / or beam shape are also conceivable.
- 1 Spülmaschine1 dishwasher
- 2 Spülkammer2 rinsing chamber
- 3 Geschirrkorb3 crockery basket
- 4 Geschirrkorb4 crockery basket
- 5 Sprüharm5 spray arm
- 6 Sprüharm6 spray arm
- 7 Spülmaschinentür7 dishwasher door
- 8 Drehachse8 axis of rotation
- 9 Dosiervorrichtung9 dosing device
- 10 Sumpfbehälter10 sump containers
- 11 Infrarot-Sensoreinheit11 infrared sensor unit
- 12 Infrarotsender12 infrared transmitters
- 13 Infrarotempfanger13 infrared receivers
- 14 Klappe14 flap
- 15 Auslauföffnung15 outlet opening
- 16 Schauglas16 sight glass
- 17 Nachfüllöffnung17 refill opening
- 18 Auswerte- und Steuereinheit18 evaluation and control unit
- 19 Gehäuse19 housing
- 20 dachförmiger Vorsprung20 roof-shaped projection
- T ZeitT time
- I IntensitätI intensity
- P1 PeakP1 peak
- P2 PeakP2 peak
- P3 PeakP3 peak
- P4 PeakP4 peak
- P5 PeakP5 peak
- T1 ZeitpunktT1 time
- T2 ZeitpunktT2 time
- T3 ZeitpunktT3 time
- T4 ZeitpunktT4 time
- T5 ZeitpunktT5 time
- S1 StörpeakS1 interference peak
- S2 StörpeakS2 interference peak
Claims (11)
dadurch gekennzeichnet, dass
die Sensoreinheit 11 wenigstens einen Infrarotsender 12 und/oder einen Infrarotempfänger 13 umfasst.Dishwasher with a working space, with at least one rotatable in the working space arranged spray arm and with a metering device for supplying and dosing a substance, such as cleaners, rinse aid, etc. in the working space, as an insert part with a housing for insertion into a recess of an inner wall of the working space , For example, is formed in the door of the working space, and with a sensor unit for detecting a Sprüharmbewegung in the working space of the dishwasher, which is at least partially disposed in a housing of the metering device
characterized in that
the sensor unit 11 comprises at least one infrared transmitter 12 and / or one infrared receiver 13.
Applications Claiming Priority (1)
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DE102016112442.7A DE102016112442A1 (en) | 2016-07-07 | 2016-07-07 | Dishwasher with sensor unit for determining a rotary movement of a spray arm |
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EP3266360A1 true EP3266360A1 (en) | 2018-01-10 |
EP3266360B1 EP3266360B1 (en) | 2022-08-10 |
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EP17178568.6A Active EP3266360B1 (en) | 2016-07-07 | 2017-06-29 | Dishwasher with sensor unit for determining rotation of a spray arm |
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US (1) | US20180008118A1 (en) |
EP (1) | EP3266360B1 (en) |
CN (1) | CN107581990A (en) |
DE (1) | DE102016112442A1 (en) |
PL (1) | PL3266360T3 (en) |
WO (1) | WO2018007533A1 (en) |
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CN110432846A (en) * | 2018-05-04 | 2019-11-12 | 青岛海尔洗碗机有限公司 | A kind of middle spray structure for spraying dish-washing machine and the dish-washing machine with the structure |
CN110693426A (en) * | 2018-07-09 | 2020-01-17 | 青岛海尔洗碗机有限公司 | Spraying device of dish washing machine |
US11022757B1 (en) | 2019-11-26 | 2021-06-01 | Cisco Technology, Inc. | Using an anti-reflection coating with a grating coupler |
KR20220072650A (en) * | 2020-11-25 | 2022-06-02 | 엘지전자 주식회사 | Member for holding sensor and dishwasher comprising member for holding sensor |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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DE10034546A1 (en) | 1999-07-15 | 2001-03-08 | Aweco Appliance Sys Gmbh & Co | Dishwasher comprises radar sensor so that execution of programme can be controlled according to requirements |
WO2011035940A1 (en) * | 2009-09-24 | 2011-03-31 | Henkel Ag & Co. Kgaa | Method and system for detecting the rotation of a spray arm in a dishwasher |
-
2016
- 2016-07-07 DE DE102016112442.7A patent/DE102016112442A1/en active Pending
-
2017
- 2017-06-29 PL PL17178568.6T patent/PL3266360T3/en unknown
- 2017-06-29 EP EP17178568.6A patent/EP3266360B1/en active Active
- 2017-07-06 WO PCT/EP2017/066958 patent/WO2018007533A1/en active Application Filing
- 2017-07-06 CN CN201710549281.XA patent/CN107581990A/en active Pending
- 2017-07-06 US US15/643,419 patent/US20180008118A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10034546A1 (en) | 1999-07-15 | 2001-03-08 | Aweco Appliance Sys Gmbh & Co | Dishwasher comprises radar sensor so that execution of programme can be controlled according to requirements |
WO2011035940A1 (en) * | 2009-09-24 | 2011-03-31 | Henkel Ag & Co. Kgaa | Method and system for detecting the rotation of a spray arm in a dishwasher |
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WO2018007533A1 (en) | 2018-01-11 |
EP3266360B1 (en) | 2022-08-10 |
US20180008118A1 (en) | 2018-01-11 |
CN107581990A (en) | 2018-01-16 |
DE102016112442A1 (en) | 2018-01-11 |
PL3266360T3 (en) | 2022-11-28 |
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