EP3266360B1 - Lave-vaisselle comportant une unité de détection destinée à déterminer un mouvement rotatif d'un bras de pulvérisation - Google Patents

Lave-vaisselle comportant une unité de détection destinée à déterminer un mouvement rotatif d'un bras de pulvérisation Download PDF

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Publication number
EP3266360B1
EP3266360B1 EP17178568.6A EP17178568A EP3266360B1 EP 3266360 B1 EP3266360 B1 EP 3266360B1 EP 17178568 A EP17178568 A EP 17178568A EP 3266360 B1 EP3266360 B1 EP 3266360B1
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EP
European Patent Office
Prior art keywords
spray arm
dishwasher
housing
infrared
working chamber
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.)
Active
Application number
EP17178568.6A
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German (de)
English (en)
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EP3266360A1 (fr
Inventor
Kurt Wallerstorfer
Andreas Pleschinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanhua Aweco Appliance Systems GmbH
Original Assignee
Sanhua Aweco Appliance Systems GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Publication of EP3266360A1 publication Critical patent/EP3266360A1/fr
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Publication of EP3266360B1 publication Critical patent/EP3266360B1/fr
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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
    • A47L15/14—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 publication DE 10034546 Al described.
  • the interior of a dishwasher is monitored by means of one or more radar sensors using the Doppler effect.
  • This sensor system is very complex and correspondingly expensive.
  • no technically flawless function of such a dishwasher could be realized up to now.
  • the object of the invention based on a dishwasher according to the preamble of claim 1, is to propose a dishwasher with improved operational reliability.
  • a dishwasher according to the invention with a sensor unit for detecting a spray arm movement in the working area is characterized in that guide elements are provided to keep water running off after it has passed through the spray arm away from the beam path of the infrared light. Water running down could cause reflections that deliver unwanted interference signals.
  • the housing can include these according to the invention, 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 running down is guided around it to the side.
  • such guide elements can be provided on the inner wall of the working space, whereby the entire device is protected from water running down and thus also the infrared beam path.
  • This sensor unit is at least partially in the housing of the device designed as an insert part, which is used for supplying and dosing a working substance such as a cleaning agent, rinse aid, etc.
  • a dosing device Such a device is referred to below as a dosing device.
  • the terms “dishwasher”, “dishwasher” or “dishwasher” are used below as synonymous terms, as are the terms “water jet” and “lye jet”.
  • a sensor unit With the help of a sensor unit according to the invention, it is possible to monitor program sequences during operation. In particular, this can be used to determine whether and which spray arm is rotating properly or is malfunctioning.
  • infrared light enables reliable and largely trouble-free detection, in particular of the movement of the spray arm, even under the ambient conditions in the work area of a dishwasher during operation. Due to the large range of an infrared beam, spray arms can also be detected at a greater distance from the sensor unit or in an unfavorable position, for example with regard to the angular orientation.
  • the functional principle of the sensor unit is based on infrared light being emitted by an infrared transmitter, reflected in the work area and then detected again by an infrared receiver.
  • an infrared beam can be reflected to the receiver via a reflector located stationary in the working area of the machine, with changes in the IR beam being detected, for example in intensity, which are caused by a rotating spray arm, a component attached to the spray arm or by a jet of water or suds from the spray arm caused.
  • a beam emitted by the IR transmitter is directed through the rotating spray arm or an element connected to it, e.g Receiver reflected. These reflections are therefore directly correlated with the rotation of the spray arm.
  • the reflections and/or changes in reflections are to be detected significantly in particular when 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 aligning at least one spray arm nozzle in such a way that the water jet or the suds jet of the washing suds at least partially crosses the beam path of the infrared light.
  • the reflections desired according to the invention can be caused by the water or the lye.
  • the beam path of the infrared light is preferably formed in such a way, for example by means of additional optical elements, that a focal point or at least one focusing zone results, which is illuminated by the water or lye jet mentioned.
  • the desired reflection is provided by the spray arm self induced.
  • the arrangement and surface design of the spray arm can be provided accordingly.
  • a spray arm can have a coating that reflects infrared light well, at least in certain areas.
  • the beam path of the infrared light or the position of the spray arm relative to one another can be arranged in such a way that the spray arm crosses the beam path at least with its reflection zone.
  • a beam path can advantageously 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.
  • a special reflector for infrared light can be configured by mirror surfaces and/or by refraction of light, optionally 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 under the terms “cat's eye” or “Lüneburg lens”.
  • such reflectors can also be used to provide a reflection angle that takes into account the relative arrangement of the infrared receiver in relation to the infrared transmitter.
  • the housing of the dosing device which contains the sensor unit, is watertight. Accommodating the sensor unit in the housing of the dosing device that is present anyway makes it easier to arrange it inside the working space of the dishwasher. On the one hand, this means that no additional opening has to be provided in the inner wall or the door of the working space, since the dosing device has to be arranged in such a recess in the inner wall anyway.
  • the housing is water and already in the known metering devices lye-tight. All electrical control elements, including those for the dosing device, which are located inside the dishwasher door, are already protected from the water or the washing-up liquid according to the prior art by the design of the housing.
  • a sensor unit can thus advantageously be accommodated within such a dosing device without major sealing problems, for which purpose, for example, an infrared-permeable window is provided in the housing.
  • a window can easily be realized with the housing wall of the dosing device in a reliably sealed manner by means of appropriate seals or also by means of a fixed connection, for example by welding or gluing.
  • the sensor unit in particular the infrared transmitter and/or receiver, is preferably arranged in such a way that they are not located directly in a water or suds jet of a spray arm nozzle. This also prevents interference signals from unwanted reflections.
  • the timing of the sensor signal is recorded and an evaluation unit is provided in order to record the periodicity or frequency of the sensor signal caused by the rotating spray arm.
  • the rotational speed or speed of the spray arm can then be determined by determining the frequency. If no periodic signal can be detected, this is a sign of a stationary, or at least a non-freely rotating, spray arm.
  • this can be displayed to an operator, for example, or the control of the program sequence can be intervened.
  • an analog evaluation circuit is provided in order to detect the periodicity or frequency of the sensor signal generated by the rotating spray arm.
  • a circuit can be implemented, for example, using a so-called PPL (phase lock loop).
  • PPL phase lock loop
  • An oscillating input signal can be compared with the sensor signal in a comparator or differential amplifier, and changes in the output voltage can be used to draw conclusions about correct rotation of a spray arm.
  • the use of an analog circuit from the point of view of costs with corresponding quantities offer the technically more advantageous solution.
  • the combination of an analog circuit with a digital evaluation which for example only intervenes if the output voltage of the analog circuit is faulty, would be conceivable.
  • various algorithms can also be provided in order to analyze and rule out interference.
  • an integration of the signal peaks ie the determination of the area covered by the signal, can also be used to identify and exclude error peaks.
  • error signals can be recognized and ruled out that do not follow the lapse of time and the intensity of the reflections generated by the spray arm or the water or suds jet.
  • a threshold value analysis can also be used instead of or in addition to other methods of error detection.
  • FIG 1 the dishwasher 1 with the washing chamber 2 is shown schematically in section.
  • the washing chamber 2 are located at crockery baskets 3, 4 below each of which a spray arm 5, 6 is rotatably arranged.
  • a dishwasher door 7 is rotatably attached to the front, as indicated by a pivot axis 8 .
  • a dosing device 9 for adding detergent is provided in the dishwasher door 7 .
  • a sump tank 10 which contains, for example, the usual filter and the water drain.
  • FIG 2 the arrangement of an infrared sensor unit 11 in the dosing device 9 is illustrated, which includes an infrared transmitter 12 and an infrared receiver 13 .
  • the dosing device 9 is as already based figure 1 described, used in the dishwasher door 7.
  • the dosing device 9 includes in the usual way a flap 14 for closing a detergent chamber, an outlet opening 15 for dosing the rinse aid and a sight glass 16 and a refill opening 17 for the rinse aid.
  • the evaluation and control unit can also be arranged inside the dishwasher door, as shown in figure 1 implied. on the in figure 1 indicated location of the evaluation and control unit 18, this can be connected directly to the displays, buttons and other controls required to operate the machine.
  • FIG 3 a metering device for installation in a dishwasher door according to the invention is shown, with a reservoir 1 being provided for holding cleaning agent. This cleaning agent is fed into the dishwashing compartment in a controlled manner during the washing phase of the dishwasher.
  • a lid 2 is opened so that the cleaning agent can run out of the reservoir 1 or be flushed out.
  • a roof-shaped projection 20 serves as a guide element to divert water or lye running down.
  • the infrared sensor unit 11 is built into the edge of the housing 19 of the dosing device, for example.
  • FIG 4 an infrared sensor signal is shown as an example over time.
  • the horizontal axis of the diagram shows the time t while the vertical axis shows the intensity I.
  • the sensor signal S shows different peaks P1 to P5, which are arranged periodically over time.
  • the respective points in time t1 to t5 are marked with corresponding arrows.
  • the diagram according to figure 4 shows two further peaks S1 and S2 as an example, which represent interference signals that can be caused, for example, by undesired reflections from dripping water or the like.
  • interference peaks S1 and S2 can be recognized and eliminated by suitable evaluation using the evaluation unit 18 .
  • This evaluation can, for example, be designed in such a way that only periodically recurring signals P1 to P5 are perceived as real sensor signals, while non-periodic signals are perceived as interference signals.
  • Another way of detecting the interference signals is, for example, to integrate the corresponding signal peaks over time, which mathematically determines the area covered by the peaks. Since an integral value is to be expected within a certain interval with regular sensor signals, other signals, such as the linear interference signals S1 and S2, can be recognized and excluded.
  • a malfunction for example a spray arm that is stationary or rotating too slowly, is detected on the basis of the sensor signal, this can be indicated in a display for the operator.
  • the dishwasher according to the invention can also be controlled as a function of the sensor signal.
  • the amount of water and/or the pump pressure can be varied.
  • controllable nozzles with regard to jet orientation and/or jet 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)

Claims (8)

  1. Lave-vaisselle pourvu d'un compartiment de travail (2), comprenant au moins un bras de pulvérisation (5, 6) disposé en rotation dans le compartiment de travail (2), et un dispositif de dosage (9) servant à alimenter et à doser une substance, telle qu'un produit nettoyant, un produit de rinçage, etc., dans le compartiment de travail (2) et qui est réalisé sous forme d'insert pourvu d'un boîtier à insérer dans un évidement d'une paroi intérieure du compartiment de travail, par exemple dans la porte du compartiment de travail, et une unité de détection (11) servant à détecter un mouvement de bras de pulvérisation dans le compartiment de travail du lave-vaisselle et qui est disposée au moins partiellement dans un boîtier du dispositif de dosage, l'unité de détection (11) comprenant au moins un émetteur infrarouge (12) et/ou un récepteur infrarouge (13),
    caractérisé en ce que le boîtier (19) du dispositif de dosage (9) présente des éléments de guidage (20) afin de garder la trajectoire du faisceau de la lumière infrarouge au moins partiellement libre de l'eau s'écoulant du boîtier, et/ou en ce que la paroi intérieure du compartiment de travail (2) présente des éléments de guidage (20) afin d'éloigner l'eau d'écoulement de la trajectoire du faisceau de la lumière infrarouge.
  2. Lave-vaisselle selon la revendication 1, caractérisé en ce que le bras de pulvérisation (5, 6) et/ou un jet d'eau ou de lessive d'une buse de pulvérisation croise la trajectoire du faisceau de l'émetteur infrarouge (12) et/ou du récepteur infrarouge (13) pendant la rotation du bras de pulvérisation.
  3. Lave-vaisselle selon l'une quelconque des revendications précédentes, caractérisé en ce que le bras de pulvérisation (5, 6) comprend un réflecteur pour la lumière infrarouge.
  4. Lave-vaisselle selon l'une quelconque des revendications précédentes, caractérisé en ce que le boîtier (19) du dispositif de dosage (9) est réalisé de manière étanche à l'eau.
  5. Lave-vaisselle selon l'une quelconque des revendications précédentes, caractérisé en ce que les éléments de guidage sont réalisés sous forme de toit (20) sur un passage laissant passer l'infrarouge du boîtier (19) du dispositif de dosage (9).
  6. Lave-vaisselle selon l'une quelconque des revendications précédentes, caractérisé en ce que l'unité de détection (11) est disposée de telle sorte qu'elle ne se trouve pas directement dans un jet d'eau d'une buse de bras de pulvérisation.
  7. Lave-vaisselle selon l'une quelconque des revendications précédentes, caractérisé en ce que la courbe de temps du signal de capteur est détectée et une unité d'évaluation est prévue pour détecter la périodicité ou la fréquence du signal de capteur provoqué par le bras de pulvérisation tournant.
  8. Lave-vaisselle selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un circuit d'évaluation analogique est prévu.
EP17178568.6A 2016-07-07 2017-06-29 Lave-vaisselle comportant une unité de détection destinée à déterminer un mouvement rotatif d'un bras de pulvérisation Active EP3266360B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016112442.7A DE102016112442A1 (de) 2016-07-07 2016-07-07 Geschirrspüler mit Sensoreinheit zur Bestimmung einer Drehbewegung eines Sprüharms

Publications (2)

Publication Number Publication Date
EP3266360A1 EP3266360A1 (fr) 2018-01-10
EP3266360B1 true EP3266360B1 (fr) 2022-08-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP17178568.6A Active EP3266360B1 (fr) 2016-07-07 2017-06-29 Lave-vaisselle comportant une unité de détection destinée à déterminer un mouvement rotatif d'un bras de pulvérisation

Country Status (6)

Country Link
US (1) US20180008118A1 (fr)
EP (1) EP3266360B1 (fr)
CN (1) CN107581990A (fr)
DE (1) DE102016112442A1 (fr)
PL (1) PL3266360T3 (fr)
WO (1) WO2018007533A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110432846A (zh) * 2018-05-04 2019-11-12 青岛海尔洗碗机有限公司 一种中喷淋洗碗机的喷淋结构及具有该结构的洗碗机
CN110693426A (zh) * 2018-07-09 2020-01-17 青岛海尔洗碗机有限公司 一种洗碗机的喷淋装置
US11022757B1 (en) 2019-11-26 2021-06-01 Cisco Technology, Inc. Using an anti-reflection coating with a grating coupler
KR20220072650A (ko) * 2020-11-25 2022-06-02 엘지전자 주식회사 센서 고정 부재 및 센서 고정 부재를 포함하는 식기 세척기

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6675818B1 (en) 1999-07-15 2004-01-13 Aweco Appliance Systems Gmbh & Co. Kg Dishwashing machine
DE102009044960A1 (de) * 2009-09-24 2011-03-31 Henkel Ag & Co. Kgaa Verfahren und System zur Detektion der Rotation eines Sprüharms in einer Geschirrspülmaschine

Also Published As

Publication number Publication date
PL3266360T3 (pl) 2022-11-28
CN107581990A (zh) 2018-01-16
DE102016112442A1 (de) 2018-01-11
US20180008118A1 (en) 2018-01-11
EP3266360A1 (fr) 2018-01-10
WO2018007533A1 (fr) 2018-01-11

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