EP2206457A1 - Waschmittelermittlung - Google Patents

Waschmittelermittlung Download PDF

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Publication number
EP2206457A1
EP2206457A1 EP09000087A EP09000087A EP2206457A1 EP 2206457 A1 EP2206457 A1 EP 2206457A1 EP 09000087 A EP09000087 A EP 09000087A EP 09000087 A EP09000087 A EP 09000087A EP 2206457 A1 EP2206457 A1 EP 2206457A1
Authority
EP
European Patent Office
Prior art keywords
detergent
light
turbidity
fluid
dish
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.)
Withdrawn
Application number
EP09000087A
Other languages
English (en)
French (fr)
Inventor
Girish Pimputkar
Per-Erik Pers
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.)
Electrolux Home Products Corp NV
Original Assignee
Electrolux Home Products Corp NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to EP09000087A priority Critical patent/EP2206457A1/de
Publication of EP2206457A1 publication Critical patent/EP2206457A1/de
Withdrawn legal-status Critical Current

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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
    • A47L15/42—Details
    • A47L15/4297—Arrangements for detecting or measuring the condition of the washing water, e.g. turbidity
    • 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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0055—Metering or indication of used products, e.g. type or quantity of detergent, rinse aid or salt; for measuring or controlling the product concentration
    • 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
    • A47L15/449—Metering controlling 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
    • 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
    • A47L2401/02—Consumable products information, e.g. information on detergent, rinsing aid or salt; Dispensing device information, e.g. information on the type, e.g. detachable, or status of the device
    • A47L2401/023—Quantity or concentration of the consumable product
    • 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
    • A47L2401/02—Consumable products information, e.g. information on detergent, rinsing aid or salt; Dispensing device information, e.g. information on the type, e.g. detachable, or status of the device
    • A47L2401/026—Nature or type of the consumable product, e.g. information on detergent, e.g. 3-in-1 tablets, rinsing aid or salt
    • 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
    • A47L2401/10—Water cloudiness or dirtiness, e.g. turbidity, foaming or level of bacteria
    • 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
    • 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
    • A47L2501/30—Regulation of machine operational steps within the washing process, e.g. performing an additional rinsing phase, shortening or stopping of the drying phase, washing at decreased noise operation conditions

Definitions

  • the present invention generally relates to a dish-washing machine for washing dishware and, more particularly, to a detergent detector for detection of the presence of detergent in a fluid, or liquid medium, contained in the dish-washing machine.
  • a dish-washing machine is an apparatus for automatically washing dishware such as plates, glasses, cuttery and other utensils used in, e.g., cooking or serving.
  • a detergent can be introduced into a detergent container (a.k.a detergent receptable) or the like and water can be supplied.
  • the detergent may be of different types, such as powder, gel or tablets.
  • the present invention seeks to mitigate, alleviate or eliminate one or more of the above-mentioned deficiences and disadvantages singly or in combination.
  • a detergent detector for detection of the presence of detergent in a fluid contained in a dish-washing machine, wherein the detergent detector comprises: a turbidity sensor configured to measure the turbidity of a fluid during a predetermined time period subsequent to an expected release of detergent into the fluid, the turbidity being indicative of the presence of detergent in the fluid; and a processor communicatively connected to the turbidity sensor, the processor being configured to determine a turbidity value based on the measured turbidity and to interpret the turbidity value as an indication of the presence of detergent.
  • expected release of detergent may include multiple expected releases of detergent.
  • the present invention is based on the inventors' realization that the point of detergent release is known for any given washing cycle in dish-washing machines and, furthermore, that the turbidity of the fluid contained in the dish-washing machine is a reliable indication of the presence of detergent, at least for a relatively short time period (e.g. 120-300 seconds) subequent to the detergent release.
  • a relatively short time period e.g. 120-300 seconds
  • very little or no soil is dissolved in the dish-washing water. Consequently, the initial increase in turbidity of the dish-washing water is only, or at least for the major part, due to the presence of undissolved solid detergent particles.
  • detergent is missing, there will be no or very little turbidity during this relatively short time period.
  • the predetermined time period is less than or equal to 300 seconds, such as less than or equal to 120 seconds. It is within this time period that the turbidity gives the best, or most reliable, indication of the presence of detergent. After this period, the turbidity of the fluid is increasingly influenced by other particles in the fluid, such as soil from dishware, and hence the indication of the presence of detergent becomes less reliable the longer the time period is.
  • the turbidity sensor is configured to measure the turbidity of the fluid continuously. This way, turbidity variations can be monitored over the predetermined time period. After the detergent release, the turbidity will vary over the predetermined time. In addition, the inventors have found that variations in the turbidity over this predetermined time period are distinctively different for different detergent types. Thus, by continuously monitoring the turbidity (which is indicative of the presence of detergent) over the predetermined time period and comparing it with known characteristics of different detergent types in advance, it may be possible to interpret which detergent type is used.
  • the processor is configured to communicate a signal indicative of the presence of detergent to a controller forming part of a dish-washing machine, the controller being communicativeley connected to the processor and configured to control a washing program of the dish-washing machine in dependence of the indication of the presence of detergent.
  • the turbidity sensor comprises a light source for emitting light, the light having a radiant intensity; and a light-sensitive element for receiving light emitted from the light source, the light source and the light-sensitive element being positioned relative to each other so that, when the light source is in operation, light emitted from the light source propagates through the fluid on its way to the light sensitive element, wherein the light-sensitive element is configured to measure the radiant intensity of light received at the light-sensitive element.
  • the processor may be configured to compare the radiant intensity of the light emitted from the light source with the radiant intensity of the light received at the light-sensitive element and to determine, based on this comparison, the turbidity value.
  • the processor is configured to communicate a signal indicative of the presence of detergent to a user interface, the user interface being communicativeley connected to the processor and configured to indicate the presence of detergent to a user.
  • the user interface may include a display screen.
  • the processor is configured to communicate a signal indicative of the presence of detergent to a transmitter, the transmitter being communicativeley connected to the processor and configured to transmit the signal indicative of the presence of detergent to a receiver.
  • the receiver may be external to the dish-washing machine, in which the detergent detector is employed.
  • a dish-washing machine comprising a detergent detector according to the above-mentioned first aspect of the invention.
  • a method for detecting the presence of detergent in a fluid contained in a dish-washing machine comprises: measuring the turbidity of a fluid during a predetermined time period subsequent to an expected release of detergent into the fluid, the turbidity being indicative of the presence of detergent in the fluid; determining a turbidity value based on the measured turbidity of the fluid; and interpreting the turbidity value as an indication of the presence of detergent.
  • expected release of detergent may include multiple expected releases of detergent.
  • the predetermined time period is less than or equal to 300 seconds, such as less than or equal to 120 seconds.
  • the step of measuring comprises continuously measuring the turbidity of the fluid, so that turbidity variations can thereby be monitored over the predetermined time period.
  • the method comprises controlling a washing program of the dish-washing machine in dependence of the indication of the presence of detergent.
  • the method comprises: emitting light, having a radiant intensity, at a light source; receiving light from the light source, at a location to which the light propagates through the fluid, and measuring the radiant intensity of the received light; and comparing the radiant intensity of the light emitted from the light source with the radiant intensity of the light received at the light-sensitive element for determing the turbidity value.
  • the method comprises communicating a signal indicative of the presence of detergent to a user interface for indicating the presence of detergent to a user.
  • the method comprises communicating a signal indicative of the presence of detergent to a transmitter for transmitting the signal to a receiver.
  • a computer-program product comprising software instructions which, when executed in an apparatus having computer capabilities, perform the method according to the third aspect of the invention.
  • the computer-program product comprises computer program code means, comprising:
  • the predetermined time period is less or equal to 300 seconds, preferably less or equal to 120 seconds.
  • the computer-program product may further comprise:
  • the computer-program product may further comprise:
  • the second, third and fourth aspects may exhibit the same advantages and features as the first aspect.
  • FIG. 1 illustratively shows a detergent detector 100 in accordance with an exemplary embodiment of the invention.
  • the detergent detector 100 according to this exemplary embodiment, which is here represented in block-diagram form, comprises a turbidity sensor 120 for measuring the turbidity of a fluid 110.
  • the detergent detector 100 comprises a data processing unit or processor 130 communicatively coupled to the turbidity sensor 120.
  • the detergent detector 100 may further include or be coupled to a power supply section, a clock and similar auxiliary components.
  • these components have been intentionally omitted from the drawings, since they are not considered necessary for explaining the principles of the present invention.
  • the addition of such components is considered to belong to the common general knowledge of persons skilled in the art.
  • the turbidity sensor 120 comprises a light-emitting portion 210 and a light-receiving portion 220.
  • the light-emitting 210 and light-receiving 220 portions are so positioned that light emitted by the former, at least for the most part, can propagate through the fluid 110 to reach the latter.
  • the light-emitting portion 210 comprises a light source 211 and a focusing lens 212.
  • the light source 211 may be subject to certain requirements regarding dimensions, reliability and power consumption, and can advantageously be realised as a solid-state light source such as a light-emitting diode (LED).
  • LED light-emitting diode
  • the focusing lens 212 may serve as a relatively simple means for collecting the light beams emitted by the light source 211 into a parallel or substantially parallel beam.
  • Different focusing means could be envisaged, such as a collimator or an assembly of several lenses.
  • the light emitted by the light source 211 at a radiant intensity I 0 , may propagate along an optical path 111, a portion of which intersects the fluid 110, and is eventually received by the light-receiving portion 220.
  • optical attenuation which, as will be described hereinafter may, e.g., be the result of detergent which is dissolved therein
  • the light beam exits the fluid 110 with intensity I , which may be comparatively lower than the radiant intensity I 0 of the emitted light.
  • the light-receiving portion 220 comprises a light-sensitive element 221, which may suitably be a phototransistor for receiving light in a wavelength range that is compatible with the light source 211.
  • the light-sensistive element 221 may be one from a group comprising a phototransistor, a photodiode and a photoresistor.
  • Phototransistors and photodiodes are both capable of emitting a voltage responsive to the radiant intensity of light impinging on a light-sensitive surface.
  • the resistance of a photoresistor may vary in dependence of the intensity of light hitting a light-sensitive surface of the photoresistor.
  • these components are suitable for measuring the radiant intensity of received light.
  • this latter may advantageously be preceded by a collimator 222 or a similar device, which is capable of cutting out light not impinging substantially on the optical axis 111.
  • a signal that encodes the radiant intensity of the received light I can then be provided to the processor 230.
  • the detergent detector comprises the processor 130.
  • the processor 130 is configured to receive the two signals indicative of the radiant intensities of the emitted and received light. That is I 0 and I , respectively.
  • the processor 130 comprises a computing means 231.
  • the computing means 231 is configured to receive the two signals indicative of the radiant intensities of the emitted and received light and provide, on the basis of these, a signal indicative of the turbidity of the fluid 110 to an output gateway 232.
  • the computing means 231 is configured to output a turbidity value on the basis of the calculated transmittance.
  • turbidity refers to the concentration of light-scattering or light-absorbing particles suspended in the fluid 110.
  • the transmittance is indicative of the turbidity of the fluid 110 via an empirical transmittance-turbidity curve, such as the illustrative curve shown in FIG 2.
  • FIG. 2 shows an exemplary curve of transmittance T (in per cent) as a function of turbidity Turb (in arbitrary units) in a range of interest.
  • Dissolved matter such as detergent in the form of e.g. gels, powder or tablets generally attenuate light travelling in the fluid 110.
  • the point of expected detergent release (or rather, the opening of the detergent receptable) is known for any given washing cycle in dish-washing machines.
  • the inventors have realized that during a relatively short time period after the expected detergent release (such as 120-300 seconds), very little or no soil is suspended into the dish-washing water. Consequently, the initial increase in turbidity of the dish-washing water is only, or at least for the major part, due to the detergent being incompletely dissolved in the fluid.
  • the turbidity would be zero or very low during this relatively short time period.
  • the processor 130 may comprise a comparator or interpreting means 233 for interpreting the turbidity value as an indication of the presence of detergent.
  • a signal indicative of the turbidity is provided to the interpreting means 233 from the gateway 232. If the turbidity is determined to be less than a certain threshold value, the interpreting means 233 will indicate that no detergent is in the process of being dissolved in the fluid 110. On the other hand, if there is a significant increase in turbidity, then the turbidity value is determined to be above the certain threshold value and the interpreting means 233 will, accordingly, indicate that detergent is being dissolved in the fluid 110.
  • the interpreting means 233 may be communicatively connected to a user interface 301, e.g. a display screen, forming part of the dish-washing machine ( see FIG. 4 ). Thus, the user can be informed whether detergent is present in the dish-washing fluid or not through the user interface. Additionally, or alternatively, the interpreting means 233 may be communicatively connected to a regulating means 302 forming part of the dish-washing machine. Additionally, or alternatively, interpreting means 233 may be communicatively connected to a transmitter 303 for transmitting a signal indicative of the detergent presence to a receiver, which may be external to the dish-washing machine.
  • FIG 3 is a graphical representation of the turbidity (i.e. indicative of detergent presence) in the dish-washing water during a predetermined time period of 120 seconds after detergent release into the fluid 110.
  • the turbidity in arbitrary units
  • the turbidity is represented by the vertical axis.
  • the turbidity is represented by a measured voltage, which is indicative of the radiant intensity of light impinging on a light-sensitive surface of the light-sensitive element 221.
  • the time (in seconds) after detergent release is represented by the horizontal axis. The point "0" indicates the release of detergent.
  • the point of detergent release is the point of time when the detergent receptable is activated, i.e. opened, for introducing the detergent into the dish-washing machine.
  • the point of detergent release is known in advance, i.e. known a priori, for any given washing cycle in dish-washing machines.
  • the inventors have realized that different detergents exhibit distinctively different behavior as regards the measured turbidity in the dish-washing water, at least for a relatively short time period such as 120 seconds after the detergent release.
  • the various curves represent the turbidity increase (i.e., voltage drop in the illustrated example) in fluid 110 due to detergent dissolution during the relatively short time period after the detergent release for three different detergent types.
  • Curve A represents the case where detergent is missing. In this case, the voltage will not change significantly, since there will be no apparent turbidity increase.
  • Curve B illustrates a case where a detergent without polymers is used. Such detergent may, e.g., be powder or a tablet without polymers.
  • Curve C illustrates such a case where the detergent includes polymers, e.g. a tablet with polymers.
  • the polymers will break down the tablet into a foam base solution when it gets into contact with the water.
  • the inventors' have found that the foam causes a relatively rapid increase in turbidity (thus, a rapid voltage drop) as shown by Curve C.
  • the turbidity sensor 120 is therefore advantageously configured to measure the turbidity value of the fluid 110 continuously, so that variations in the turbidity can thereby be monitored over the predetermined time period of, e.g., the 120 seconds illustrated in FIG. 3 .
  • the predetermined time period e.g., the 120 seconds illustrated in FIG. 3 .
  • FIG. 4 is a schematic view of an exemplary dish-washing machine 400, or dishwasher, having a dishware compartment 410, in which spray arms 412, 414 are arranged.
  • Washing fluid such as water
  • a system 428 for deliming can be provided in the dish-washing machine 400.
  • washing fluid is pressurised by the circulation pump 424 and is fed to the spray arms 412, 414 via a heater 426.
  • the washing fluid After falling through the dishware compartment 410, the washing fluid reaches a sump 430 via a filter 432.
  • the detergent detector 100 is located in the sump 430.
  • the light-emitting portion (not shown) and the light-receiving portion (not shown) are provided at such locations relative to each other that any light emitted by the turbidity sensor passes through the washing fluid.
  • the sump 430 is generally fluid-filled up to a certain level during operation of the dish-washing machine 400. By placing both the light-emitting portion and the light-receiving portion of the turbidity sensor 110 below this level, a suitable optical path between these can be achieved.
  • the turbidity sensor 120 may be advantageous to place downstream of the filter 432, because coarse particles are then removed and cannot disadvantageously perturb the measurement. It may further be advantageous to place the turbidity sensor 110 in a region of the sump 430 in which the current velocity during operation of the dish-washing machine 400 is relatively high, because this reduces the rate of deposition on light-emitting and light-receiving surfaces (not shown) of the turbidity sensor. It also ensures that the composition - and consequently the turbidity - of that fluid 110 which is in contact with the sensor 120 (on which the measurements are based) is approximately identical to the composition of that fluid 110 which is in contact with the dishware. Alternatively, the turbidity sensor 110 can be placed around a portion of the hydraulic path between the sump 430 and any of the spray arms 412, 414.
  • FIG. 5 illustrates a certain embodiment of a method 500 for detecting the presence of detergent in a fluid contained in a dish-washing machine.
  • the method comprises an initial step 510 of emitting light from a light source, the light having an intensity I 0 .
  • a second step 512 light emitted by the light source is received at a location to which the emitted light propagates through the fluid, and its radiant intensity is measured.
  • a measured turbidity corresponding to the transmittance can be calculated and, hence, a turbidity value can be determined.
  • a turbidity value of a fluid can be determined. This is performed during a predetermined time period subsequently to a release of detergent into the fluid. This predetermined time period is relatively short (e.g. 120-300 seconds as described previously) and, accordingly, the turbidity is a sufficiently reliable indication of the presence of detergent in the fluid.
  • the determined turbidity value is interpreted as an indication of the presence of detergent.
  • the measurement comprises continuously measuring the turbidity of the fluid, so that turbidity variations can thereby be monitored over the predetermined time period.
  • the method comprises the additional step 520 of controlling a washing program of the dish-washing machine in dependence of the indication of the presence of detergent.
  • the method may additionally comprise a step 522 for communicating a signal indicative of the presence of detergent to a user interface for thereby indicating the presence of detergent to a user.
  • the disclosed method 500 may be performed by software instructions included in a computer program product, which, as used herein, may be a computer-readable medium having software instructions stored thereon.
  • computer readable mediums may comprise computer storage media and communication media.
  • computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data.
  • Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer.
  • communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
  • the turbidity sensor 120 may be of a type having a radiant intensity which is variable and the processor 130 may include or be connected to a control unit, which is configured to adjust, by selecting one intensity level out of a plurality of predetermined intensity levels, the radiant intensity of the light emitted by the light source 211 in dependence of the measured radiant intensity of light received at the light-sensitive element 221.
  • a control unit which is configured to adjust, by selecting one intensity level out of a plurality of predetermined intensity levels, the radiant intensity of the light emitted by the light source 211 in dependence of the measured radiant intensity of light received at the light-sensitive element 221.
  • the inventors have realized that it may be advantageous to detect detergent presence during pre-wash washing cycles as well.
  • Many of today's dish-washing machines have dishwashing programs including both a main washing phase/cycle and, additionally, a so-called pre-wash phase/cycle.
  • the pre-wash takes place just before the main washing.
  • water is generally sprayed at the dishware contained in the dish-washing machine and soil removal is only, or at least mostly, caused by the mechanical action taking place in the dish-washing machine as the water jets hit the dishware. Normally, the water is not heated during pre-wash and detergent is not dispensed in the water either.
  • the controller of the dish-washing machine can be configured to control the washing program of the dish-washing machine such that the pre-wash converts to a main-wash time period. Consequently, wasteful usage of detergent during pre-wash can be avoided or at least reduced and, accordingly, an environment friendly detergent detector can be provided.

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EP09000087A 2009-01-07 2009-01-07 Waschmittelermittlung Withdrawn EP2206457A1 (de)

Priority Applications (1)

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EP09000087A EP2206457A1 (de) 2009-01-07 2009-01-07 Waschmittelermittlung

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EP09000087A EP2206457A1 (de) 2009-01-07 2009-01-07 Waschmittelermittlung

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102590146A (zh) * 2010-12-28 2012-07-18 恩德莱斯和豪瑟尔测量及调节技术分析仪表两合公司 用于确定介质的测量变量、特别是用于浊度测量的方法
EP2644079A1 (de) 2012-03-30 2013-10-02 Electrolux Home Products Corporation N.V. Waschmittel mit Trübheitssensorerkennung
EP2657687A2 (de) * 2012-04-23 2013-10-30 Samsung Electronics Co., Ltd Trübungssensor und Steuerungsverfahren dafür
EP2664264A1 (de) 2012-05-15 2013-11-20 Electrolux Home Products Corporation N.V. Verfahren und Vorrichtung zur Messung von Trübungen
EP3834695A1 (de) * 2019-12-11 2021-06-16 LG Electronics Inc. Geschirrspüler und verfahren zur steuerung davon

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EP1180344A2 (de) * 2000-08-18 2002-02-20 Miele & Cie. GmbH & Co. Verfahren zur Ermittlung des Verschmutzungsgrades der Spülflüssigkeit bei einer mit einem Trübungssensor ausgestatteten programmgesteuerten Geschirrspülmaschine
US20030196278A1 (en) * 2002-04-19 2003-10-23 Durfee Anthony L. Static and dynamic turbidity sensing in a washing appliance
DE10257826A1 (de) * 2002-05-16 2003-11-27 Electrolux Home Prod Corp Geschirrspülmaschine und Verfahren zum Betreiben einer Geschirrspülmaschine bei Verwendung von einem Kombinationspräparat mit mehreren Wirkstoffen
DE102005050183A1 (de) * 2005-10-19 2007-04-26 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine und Betriebsverfahren für eine Geschirrspülmaschine
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Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
EP1180344A2 (de) * 2000-08-18 2002-02-20 Miele & Cie. GmbH & Co. Verfahren zur Ermittlung des Verschmutzungsgrades der Spülflüssigkeit bei einer mit einem Trübungssensor ausgestatteten programmgesteuerten Geschirrspülmaschine
US20030196278A1 (en) * 2002-04-19 2003-10-23 Durfee Anthony L. Static and dynamic turbidity sensing in a washing appliance
DE10257826A1 (de) * 2002-05-16 2003-11-27 Electrolux Home Prod Corp Geschirrspülmaschine und Verfahren zum Betreiben einer Geschirrspülmaschine bei Verwendung von einem Kombinationspräparat mit mehreren Wirkstoffen
DE102005050183A1 (de) * 2005-10-19 2007-04-26 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine und Betriebsverfahren für eine Geschirrspülmaschine
DE102006052892A1 (de) * 2006-11-09 2008-05-15 BSH Bosch und Siemens Hausgeräte GmbH Trübungssensor

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CN102590146A (zh) * 2010-12-28 2012-07-18 恩德莱斯和豪瑟尔测量及调节技术分析仪表两合公司 用于确定介质的测量变量、特别是用于浊度测量的方法
EP2644079A1 (de) 2012-03-30 2013-10-02 Electrolux Home Products Corporation N.V. Waschmittel mit Trübheitssensorerkennung
WO2013144381A1 (en) 2012-03-30 2013-10-03 Electrolux Home Products Corporation N.V. Turbidity sensor detecting detergent
EP2657687A2 (de) * 2012-04-23 2013-10-30 Samsung Electronics Co., Ltd Trübungssensor und Steuerungsverfahren dafür
CN103376253A (zh) * 2012-04-23 2013-10-30 三星电子株式会社 浊度传感器及其控制方法
EP2657687A3 (de) * 2012-04-23 2014-06-18 Samsung Electronics Co., Ltd Trübungssensor und Steuerungsverfahren dafür
US9709505B2 (en) 2012-04-23 2017-07-18 Samsung Electronics Co., Ltd. Turbidity sensor and control method thereof
EP2664264A1 (de) 2012-05-15 2013-11-20 Electrolux Home Products Corporation N.V. Verfahren und Vorrichtung zur Messung von Trübungen
EP3834695A1 (de) * 2019-12-11 2021-06-16 LG Electronics Inc. Geschirrspüler und verfahren zur steuerung davon
US11484184B2 (en) 2019-12-11 2022-11-01 Lg Electronics Inc. Dishwasher and method of controlling same
US11737642B2 (en) 2019-12-11 2023-08-29 Lg Electronics Inc. Dishwasher and method of controlling same

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