WO2003071917A2 - Vorrichtung zur überprüfung der belagbildung und wasserführendes gerät - Google Patents
Vorrichtung zur überprüfung der belagbildung und wasserführendes gerät Download PDFInfo
- Publication number
- WO2003071917A2 WO2003071917A2 PCT/EP2003/001328 EP0301328W WO03071917A2 WO 2003071917 A2 WO2003071917 A2 WO 2003071917A2 EP 0301328 W EP0301328 W EP 0301328W WO 03071917 A2 WO03071917 A2 WO 03071917A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical signal
- water
- chamber
- translucent
- area
- Prior art date
Links
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
- A47L15/42—Details
- A47L15/4229—Water softening arrangements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
- G01N21/552—Attenuated total reflection
Definitions
- the present invention relates to a device for checking the formation of deposits consisting of a translucent element with two end faces, at least one element emitting an optical signal and at least one element receiving an optical signal, and a water-carrying device, in particular for the household.
- the rinsing liquor is softened in a water softening device in areas with high water hardness before each rinsing process. If insufficiently softening water is used, characteristic limescale deposits form on the wash ware during the drying process, which have an optically disadvantageous effect, in particular on glasses and shiny stainless steel surfaces. To avoid these limescale deposits, the ion exchanger is conventionally regenerated regularly, so that no limescale deposits are to be expected in the rinsing process following the regeneration. Since the softening quality of the ion exchanger steadily decreases between regenerations and thus the deposit frequency increases, it is desirable to recognize a tendency of the deposit frequency and density early on in order to take appropriate regeneration measures.
- a change in the water hardness is measured on the basis of limescale deposits on a translucent surface by a sensor with an element emitting an optical signal and an element receiving optical signals, and a point in time for carrying out the regeneration process. tot determined depending on the measured limescale, a control unit processes the signals accordingly and initiates a regeneration process.
- the object of the present invention is therefore to provide a device which makes it possible to determine the formation of deposits or a trend in the formation of deposits and to take appropriate measures for setting a desired formation of deposits.
- the device according to the invention for checking the formation of deposits consisting of a translucent element with two end faces, furthermore has at least one element that emits an optical signal and at least one element that receives an optical signal, the translucent element being designed such that the one that emits the optical signal and the element receiving the optical signal directly adjoins the end faces of the translucent element, and the end faces are arranged such that they are always free of deposits.
- the translucent element is rod-shaped or, based on a rod shape, is helical.
- the translucent element is expediently arranged in a chamber-like area, the chamber-like area Area has at least one opening, which opens into an interior of a water-bearing household appliance, preferably a rinsing container, and also has a valve which is suitable for emptying the chamber-like area.
- the valve is expediently operated electromagnetically in the chamber-like region; the valve can preferably be driven via an actuating element with a memory effect.
- the device according to the invention is expediently arranged in the inner door of a water-carrying household appliance, in particular a dishwasher, and has a corresponding opening through which the washing liquid can circulate or can enter the chamber-like area.
- the translucent element which is preferably made of glass, particularly advantageously made of borosilicate, and, if the drying process begins, a corresponding deposit, if appropriate, leave a lime deposit.
- the extent of the deposit, in particular the lime deposits is measured via an optical signal. The measurement is based on the following physical phenomenon.
- the light emitted by the element emitting an optical signal enters the translucent element via the first end surface and is constantly reflected in this way due to the reflection taking place in the translucent element at the interface between the translucent element and the surrounding atmosphere that the light beam or the light bundle radiates with scattering losses through the translucent element and finally exits through the second end surface and enters the element receiving an optical signal. Due to the total reflection taking place in the translucent element, the brightness value is determined, which corresponds to a certain energy value. An energy difference between the element emitting the optical signal and the element receiving the optical signal is based on a certain radiation power of the transparent element and is taken into account accordingly when processing the signal value.
- an optical signal for example infrared light
- the refractive index between the translucent element and the immediately following deposit layer is changed in these areas so that the number of total reflections at the boundary layer of the translucent element drops. If a light beam or a bundle of light occurs at a certain angle on the interface of the translucent element and this area of the translucent element is covered with a deposit layer, a certain proportion of the bundle of light emerges from the translucent element and does not enter the translucent element reflected. Since the optical signal-receiving element measures the energy strength or light intensity of the emerging light from the translucent element, the received light intensity is associated with a corresponding coating, for example a limescale deposit on the translucent element.
- appropriate deposits e.g. lime deposits
- the beginning of a deposit on the translucent element can thus be determined, so that appropriate measures, e.g. if limescale is found to soften the water.
- deposits e.g. Limescale deposits are found on the translucent element before they can be seen by the human eye on glassware.
- the regeneration process for the ion exchanger is started and the normally very thin deposits, in particular lime deposits, on the translucent element are cleaned with freshly softened water and possibly with detergent.
- the chamber-like area has an opening, which is preferably designed such that no food residues can penetrate into the chamber-like area.
- a lattice-like cover is preferably provided, the gap dimension for the respective lattice openings being dimensioned such that conventional food particles, such as citrus fruit kernels, which are often encountered, cannot penetrate through them.
- the device according to the invention has a valve which is arranged such that the chamber-like area can be completely emptied.
- Conventional solenoid valves can be used to form the valve, or valves that can be mechanically actuated can also be used. Valves whose activation can be carried out using control elements made of memory metal are particularly advantageous.
- the device according to the invention has a heating element which heats the moist atmosphere in the chamber-like area and thus dries the translucent element.
- limescale forms on the translucent element when the water is not completely softened, and this limescale is determined using the measurement method described above.
- FIG. 1 shows a schematic illustration of the mode of operation of the translucent element and of the two signal-receiving and emitting elements
- FIG. 2a / 2b the functional principle of the device according to the invention on the basis of schematically illustrated translucent elements
- FIG. 3 shows a sectional illustration of a preferred embodiment of the device according to the invention
- Figure 4 is a plan view of the preferred embodiment of Figure 3 and
- an element 4 emitting an optical signal and an element 5 receiving an optical signal are connected to one another via a transparent element 2, a U-shape being chosen for the shape of the transparent element.
- the translucent element is of helical design and thus has the advantage of using a longer light path for the measurement.
- the translucent element can also be non-curved, in particular the formation of a rod-shaped, translucent element can be advantageous.
- a rod-shaped, translucent element a plurality of elements can be arranged next to one another in the chamber-like area, for example in order to obtain a certain redundancy during the measurement.
- the light spectrum can also be chosen wider, i.e. the preferred infrared range can be varied for the individual light-transmitting elements and the elements transmitting / receiving optical signals connected to them.
- FIG. 2a / b The physical phenomenon on which the device according to the invention is based is shown in FIG. 2a / b, the light emitted by the element 4 emitting the optical signal having an energy level Ei and, after passing through the transparent element 2, an energy level E 2 on the element receiving the optical signal. has.
- the translucent element 2 is without contamination, ie limescale deposits or other deposits, essentially all light rays that are emitted by the element 4 emitting the optical signal into the translucent element 2 become due to the total reflection between the translucent element and the surrounding atmosphere until the optical signal-receiving element 5 is reached and do not leave the transparent element.
- the energy level E ⁇ corresponds essentially to the energy level E 2 , so that when determining these two energy levels it is determined that no energy dirt or covering, ie limescale is present on the translucent element 2.
- limescale deposits 10 form which at least partially cover the outer surface of the translucent element 2.
- the energy level E 3 is received on the side of the optical signal emitting element 4 and the energy level E 4 is received on the side of the optical signal receiving element 5.
- the limescale 10 it can be determined that the energy level E 4 is significantly lower than the energy level E 3 , so that after determining the energy level E 4 the degree of limescale or the contamination of the translucent element 2 can be determined.
- the amount is inverted and is then present as a positive voltage.
- the program control unit downstream of the element receiving the optical signal processes this positive measurement signal and derives a corresponding measurement result based on existing measurement data.
- the regeneration of the ion exchanger is activated when a threshold value or degree of contamination is reached, so that softened water of the appropriate quality is available for the next washing program run.
- FIG. 3 shows a sectional view through a preferred embodiment of the present invention, which is used in a water-bearing household appliance.
- the device 1 according to the invention is preferably installed in the inner door 14 of a dishwasher and sealed for sealing between the washing container and the inside of the door by means of corresponding sealing elements 12.
- washing liquid flows along the arrow direction 6 into the chamber-like area 3, fills it up and thereby wets the translucent elements 2, which are designed as helices.
- the chamber-like area 3 is emptied via the valve 7 and the chamber-like area 3 is heated by means of the heating element 9 in such a way that the wetted light-transmitting element 2 dries.
- the chamber-like area 3 is flooded and emptied several times before the drying process in order to obtain reproducible results.
- a so-called PTC (Positive Temperature Component) element is preferably used as the heating element 9, which forms a specific current characteristic and is able to heat the chamber-like region 3 to a uniform temperature of, for example, over 100 ° C.
- a so-called memory wire 13 is provided for actuating the valve, which changes its shape when heated, ie when a certain current intensity flows through, and opens the valve 7.
- Valve 7 expediently consists of a rubber-elastic region 15 and a pin-like element 16, which changes its position due to the shape change of the memory wire 13 and thus opens the valve 7. After the memory wire 13 has cooled, the force exerted by the return spring 8 predominates and moves the pin 16 together with the rubber-elastic region 15 such that the valve 7 is closed.
- FIG. 4 The rear view of the device according to the invention according to FIG. 4 shows the memory wire 13 and the return spring 8, as well as the preferred round configuration of the device 1 according to the invention.
- FIG. 5 shows a plan view of the device 1 according to the invention, in particular the comb-like opening area of the opening 6, which is advantageously designed and dimensioned such that food residues cannot penetrate into the chamber-like area 3 of the device 1 according to the invention.
- a device 1 which allows the formation of deposits, e.g. the degree of water hardness, or a trend in the formation of deposits, e.g. the degree of water hardness, and appropriate measures for setting a desired deposit formation, e.g. to achieve a desired degree of water hardness.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003218652A AU2003218652A1 (en) | 2002-02-26 | 2003-02-11 | Device for monitoring the formation of a coating and water-carrying device |
EP03711881A EP1481235B1 (de) | 2002-02-26 | 2003-02-11 | Wasserführendes gerät mit einer vorrichtung zur überprüfung der belagbildung |
DE50310064T DE50310064D1 (de) | 2002-02-26 | 2003-02-11 | Wasserführendes gerät mit einer vorrichtung zur überprüfung der belagbildung |
US10/926,931 US7162896B2 (en) | 2002-02-26 | 2004-08-26 | Apparatus for checking the formation of scale, and water-carrying appliance |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10208214A DE10208214B4 (de) | 2002-02-26 | 2002-02-26 | Vorrichtung zur Überprüfung der Belagbildung und wasserführendes Gerät |
DE10208214.6 | 2002-02-26 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/926,931 Continuation US7162896B2 (en) | 2002-02-26 | 2004-08-26 | Apparatus for checking the formation of scale, and water-carrying appliance |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2003071917A2 true WO2003071917A2 (de) | 2003-09-04 |
WO2003071917A3 WO2003071917A3 (de) | 2003-12-24 |
Family
ID=27740424
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2003/001328 WO2003071917A2 (de) | 2002-02-26 | 2003-02-11 | Vorrichtung zur überprüfung der belagbildung und wasserführendes gerät |
Country Status (7)
Country | Link |
---|---|
US (1) | US7162896B2 (de) |
EP (1) | EP1481235B1 (de) |
AT (1) | ATE399988T1 (de) |
AU (1) | AU2003218652A1 (de) |
DE (2) | DE10208214B4 (de) |
ES (1) | ES2307908T3 (de) |
WO (1) | WO2003071917A2 (de) |
Families Citing this family (12)
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DE102004035718A1 (de) * | 2004-07-23 | 2006-04-13 | BSH Bosch und Siemens Hausgeräte GmbH | Verfahren zur Zufuhr von Klarspülmittel bei einer programmgesteuerten Geschirrspülmaschine |
EP1790973A3 (de) * | 2004-09-10 | 2007-06-13 | Cognis IP Management GmbH | Verfahren zur quantitativen Messung von Ablagerungen auf festen Oberflächen |
DE102005005039A1 (de) * | 2005-02-03 | 2006-08-10 | BSH Bosch und Siemens Hausgeräte GmbH | Wasserführendes Haushaltgerät |
ITTO20050856A1 (it) * | 2005-12-06 | 2007-06-07 | Eltek Spa | Componente per elettrodomestico, in particolare per lavastoviglie, e pozzetto per elettrodomestico, in particolare per lavastoviglie, che lo utilizza |
KR100735707B1 (ko) * | 2006-09-29 | 2007-07-06 | 엘지전자 주식회사 | 건조기 및 그 제어방법 |
DE102007013086A1 (de) * | 2007-03-14 | 2008-09-18 | Sgs Institut Fresenius Gmbh | Vorrichtung und Verfahren zur Erfassung von Verunreinigungen auf einem transparenten Substrat |
US8557053B2 (en) * | 2008-11-26 | 2013-10-15 | Electrolux Home Products, Inc. | Actuator assembly and associated apparatuses |
US8509473B2 (en) * | 2009-06-29 | 2013-08-13 | Ecolab Inc. | Optical processing to control a washing apparatus |
US8229204B2 (en) * | 2009-06-29 | 2012-07-24 | Ecolab Inc. | Optical processing of surfaces to determine cleanliness |
US9420937B2 (en) * | 2009-12-17 | 2016-08-23 | Whirlpool Corporation | Dishwasher with dynamically controlled cycle of operation |
US9587856B2 (en) | 2013-06-14 | 2017-03-07 | Whirlpool Corporation | Methods, apparatus and articles of manufactures to detect impurity deposits in flow-through water heaters |
US10390675B2 (en) | 2015-06-01 | 2019-08-27 | Illinois Tool Works Inc. | Warewash machine cleaning notification and in-situ dilution process |
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2002
- 2002-02-26 DE DE10208214A patent/DE10208214B4/de not_active Expired - Fee Related
-
2003
- 2003-02-11 AT AT03711881T patent/ATE399988T1/de active
- 2003-02-11 WO PCT/EP2003/001328 patent/WO2003071917A2/de active IP Right Grant
- 2003-02-11 ES ES03711881T patent/ES2307908T3/es not_active Expired - Lifetime
- 2003-02-11 EP EP03711881A patent/EP1481235B1/de not_active Expired - Lifetime
- 2003-02-11 DE DE50310064T patent/DE50310064D1/de not_active Expired - Lifetime
- 2003-02-11 AU AU2003218652A patent/AU2003218652A1/en not_active Abandoned
-
2004
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US5926269A (en) * | 1995-06-14 | 1999-07-20 | Dystar Textilfarben Gmbh & Co. | Optical probe with sensor made of optical polymer |
DE19626203A1 (de) * | 1996-06-29 | 1998-01-02 | Aeg Hausgeraete Gmbh | Optischer Sensor |
DE19714695A1 (de) * | 1997-04-09 | 1998-10-15 | Zangenstein Elektro | Wasch- oder Geschirrspülmaschine mit Trübungssensor |
DE19740266A1 (de) * | 1997-09-15 | 1999-03-18 | Ronald Dr Eberl | Verfahren zum Nachweis von Tensiden in wäßrigen Lösungen |
EP0966914A2 (de) * | 1998-06-10 | 1999-12-29 | BSH Bosch und Siemens Hausgeräte GmbH | Verfahren und wasserführendes Haushaltsgerät zur Wasserenthärtung |
EP0972486A1 (de) * | 1998-07-15 | 2000-01-19 | Whirlpool Corporation | Optischer Sensor |
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WO2000046572A1 (de) * | 1999-02-03 | 2000-08-10 | BSH Bosch und Siemens Hausgeräte GmbH | Vorrichtung zum ermitteln von ablagerungen an oberflächen, insbesondere in wasch- und/oder spülmaschinen |
Also Published As
Publication number | Publication date |
---|---|
AU2003218652A1 (en) | 2003-09-09 |
DE10208214B4 (de) | 2004-09-30 |
US20050046826A1 (en) | 2005-03-03 |
US7162896B2 (en) | 2007-01-16 |
WO2003071917A3 (de) | 2003-12-24 |
EP1481235B1 (de) | 2008-07-02 |
EP1481235A2 (de) | 2004-12-01 |
ATE399988T1 (de) | 2008-07-15 |
AU2003218652A8 (en) | 2003-09-09 |
ES2307908T3 (es) | 2008-12-01 |
DE10208214A1 (de) | 2003-09-11 |
DE50310064D1 (de) | 2008-08-14 |
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