EP1151241A1 - Vorrichtung zum ermitteln von ablagerungen an oberflächen, insbesondere in wasch- und/oder spülmaschinen - Google Patents
Vorrichtung zum ermitteln von ablagerungen an oberflächen, insbesondere in wasch- und/oder spülmaschinenInfo
- Publication number
- EP1151241A1 EP1151241A1 EP00910639A EP00910639A EP1151241A1 EP 1151241 A1 EP1151241 A1 EP 1151241A1 EP 00910639 A EP00910639 A EP 00910639A EP 00910639 A EP00910639 A EP 00910639A EP 1151241 A1 EP1151241 A1 EP 1151241A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electromagnetic radiation
- deposits
- detector
- transmitter
- radiation
- 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- Withdrawn
Links
- 238000005406 washing Methods 0.000 title claims abstract description 16
- 230000005855 radiation Effects 0.000 claims description 24
- 230000005670 electromagnetic radiation Effects 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 2
- 208000004434 Calcinosis Diseases 0.000 description 7
- 230000002308 calcification Effects 0.000 description 7
- 238000005259 measurement Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000001902 propagating effect Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000008237 rinsing water Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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
- A47L15/4295—Arrangements for detecting or measuring the condition of the crockery or tableware, e.g. nature or quantity
-
- 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
- A47L15/0057—Cleaning of machines parts, e.g. removal of deposits like lime scale or proteins from piping or tub
Definitions
- Device for determining deposits on surfaces especially in washing machines and / or dishwashers.
- the invention relates to a device for determining deposits on surfaces, in particular in liquid-carrying machines, such as washing machines and / or dishwashers.
- Machines in this sense are therefore all machines which can have deposits, in particular limescale deposits, on surfaces and which, by measuring this risk of deposits, provide a countermeasure or at least information about this condition.
- dishwashers and / or washing machines as an example of a water-carrying machine.
- dishwashers and / or washing machines hereinafter referred to as dishwashers for short
- Dishwashers are known, for example, which use complex chemical sensors to measure the lime content of the water and, for example, activate an ion exchanger if the lime content is too high. It is an object of the invention to provide a device with which deposits on surfaces, in particular in liquid-carrying machines, such as washing machines and / or dishwashers, can be determined. In this sense, calcifications or the like are particularly suitable as deposits.
- the device should be compact and insensitive to interference and should detect deposits at an early stage.
- a device according to the invention should not only be usable in novel dishwashers and / or washing machines which are designed for the use of the invention, but also be retrofittable in machines already in operation.
- the device Depending on the deposits that have been determined, the device generates signals that are fed to a control system in order to initiate steps that avoid further deposits or reduce existing ones.
- FIG. 1 shows a schematic representation of a device for determining deposits in a washing machine or dishwasher
- FIG. 2 shows a cross-sectional view of a device according to FIG. 1 with multiple internal reflections
- FIG. 3 a schematic view of a device according to the invention with a cylindrical body and multiple internal reflections with a helical beam path
- FIG. 4 a cross section of a device according to the invention with different beam paths
- FIG. 5 shows a cross section of a device according to the invention with different beam paths below
- FIG. 6 shows a cross section of a device according to the invention with different beam paths using two transmitters and one detector
- FIG. 7 a cross section of a device according to the invention with helical beam paths in a cylindrical body with a reflecting dome,
- FIG. 8 a cross section of the retroreflective dome of the device according to the invention from FIG. 7, and
- Figure 9 a preferred embodiment of an inventive
- a light-guiding body 10 is attached, into which light is introduced in such a way that it spreads within the body 10 on a predetermined beam path 40 and is internally reflected on an outer surface 12 of the body 10.
- the deposits 1 to be determined can occur on the outside of the outer surface 12. This type of reflection is referred to as "internal reflection" in the following, since the light used for measurement only propagates or is reflected within the body 10. After internal reflection, the light is received by a detector 30. Occur deposits 1 on the outer surface 12 of the body 10, they influence the reflection properties of this surface 12 for light, as a result of which the signal level of the internally reflected light changes compared to the signal level of the originally introduced light.
- the light detected after internal reflection or its signal level is measured as a measure of deposits 1 on the body 10. If this measure exceeds a predetermined limit value, the detector 30 or a control unit connected to it generates signals which are supplied to devices in order to avoid further deposits 1 or to reduce existing deposits 1.
- Such devices are e.g. B. auxiliary devices (z. B. for ion exchangers), and / or devices that visually and / or acoustically tell the user that excessive deposits 1 have occurred.
- These devices, which become active when the deposits 1 are too strong are preferably connected directly to the dishwasher or integrated therein.
- a control unit (not shown) performs a calibration of the measuring device at the beginning and / or at the end of each operating process of the dishwasher, since the device according to the invention is intended to determine deposits 1 which arise during a washing and / or washing process.
- the calibration takes into account deposits 1 on the body 10 which are already present before a rinsing and / or washing process. Furthermore, the calibration can be used to check whether deposits 1 already present on the body 10 are so thick that they have to be removed in order to ensure reliable operation of a device according to the invention. It also makes it possible to derive a trend for the formation of deposits from the history of several previous washing processes. This calibration can be carried out for the transmitter 20, the detector 30 or for both in a separate or jointly carried out process.
- control unit should control the transmitter 20 and the detector 30 so that the determination of deposits 1 takes place not only continuously but also at time intervals can be predetermined depending on the respective application.
- a material is preferably selected for the light-guiding body 10, the refractive index n of which is greater than that of the liquid 90 surrounding the body 10.
- the liquid 90 is water in conventional household dishwashers, but can be any other liquid used for cleaning, depending on the type of dishwasher. In the case of water, a refractive index n greater than 1.33 should therefore preferably be selected.
- the body 10 has a surface 12 which has the same or at least comparable properties with regard to the formation of deposits as the surface of glassware to be cleaned in the machine.
- Light is preferably used to determine deposits. However, it is possible to use any type of electromagnetic radiation.
- any light-guiding body 10 of any shape is suitable, which guides radiation from a transmitter 20 to at least one point of internal reflection and then to a detector 30.
- a detector 30 guides radiation from a transmitter 20 to at least one point of internal reflection and then to a detector 30.
- cuboid, spherical, hemispherical, cylindrical and ring-shaped body 10 or combinations of such shaped body 10 possible. It is also possible to use body 10 made of a flexible light-conducting material.
- the choice of the respective body shape is primarily determined by the desired number of internal reflections of the radiation on its way from the transmitter 20 to a detector 30, 32.
- a cylindrical body 10 was selected for the embodiments shown below.
- Figures 2 to 7 show such cylindrical bodies in different embodiments.
- the beam paths 40, 42, 44 in the body 10 can differ not only in different embodiments, but also in one embodiment (see FIGS. 4 to 8).
- the beam paths 40, 42, 44 are placed in such a way that internal reflections are distributed along the surface of the body and a determination of limescale deposits is possible with one measurement based on several reflections.
- a beam path 40, 42, 44 in the body 10 is determined by the introduction of the radiation into the body 10.
- the radiation is not introduced parallel to the longitudinal axis of the body 10 but at an angle to it.
- the number of internal reflections can be predetermined as a function of this angle, with at least two, preferably at least three or five or even more preferably at least seven internal reflections being provided here (see FIG. 2).
- the numbers of internal reflections mentioned here are only exemplary and not restrictive for the present invention, since the aim is to maximize the number of internal reflections depending on the various applications of the invention in order to detect deposits more sensitively and more precisely.
- the radiation can be radiated into the body 10 in different directions (three directions are shown). Radiation is introduced into the body 10 in such a way that it spreads in the body 10 in different ways 40, 42, 44.
- the paths 40, 42, 44 differ in the number of reflections occurring in the course of the individual paths and / or in their length (see FIG. 4). This can be achieved, inter alia, by different slopes of the helical lines of the radiation or by a choice of different locations at which radiation is introduced.
- a selective detection 30, 32 of the radiation a ratio formation of the signal level of the radiation propagating on different paths 40, 42, 44 is possible, whereby further influences on the signal levels not caused by limescale can be eliminated from the measurement.
- the selective detection 30, 32 can be achieved in different ways.
- the radiation propagating on different paths 40, 42, 44 can be detected at different points on the body 10 by a corresponding detector 30, 32 (see FIG. 5).
- a cylindrical body 10 has a reflecting end 14 and an end 16 opposite the reflecting end, at which radiation is introduced and discharged.
- the reflective end 14 can be internally mirrored, as a result of which the reflective properties at the reflective end 14 are not influenced by deposits 1 on the body 10. It is preferred that internal reflections take place at the reflecting end 14 by shaping the body 10 accordingly.
- the reflecting end 14 is designed as a hemispherical dome 14 on the body 10 (see FIG. 7), but in principle any shaped reflecting end 14 can be used that directs radiation through the body 10 to the detector 30.
- the shape of the reflective end 14 can include a and / or a plurality of planar and / or curved surfaces are formed. This is also achieved by suitably choosing the shape of the entire body 10, for example as an annular or hemispherical body (see FIG. 8).
- the radiation guiding means e.g. radiation-conducting fibers or other optical components to be introduced into the body 10.
- the radiation can be guided to the detector using such radiation-guiding devices.
- the device for determining deposits is constructed in two parts.
- a connection part AT is used, which is located inside a
- Dishwasher is located. At least the part of the device according to the invention that the deposits, z. B. calcifications, is detachably connected for exchange with the connector AT. This releasably connected part of the device according to the invention is referred to below as sensor part ST.
- the sensor part ST preferably comprises the body 10, but can also comprise the sensor 20 and / or the detector 30.
- the connection part AT enables the supply of signals necessary for measuring the deposits into the sensor part ST as well as the derivation of necessary signals from the sensor part ST. The type of these signals depends on the particular design of the sensor part ST. If the sensor part ST comprises the body 10, but not the transmitter 20 and the detector 30, these signals will be electromagnetic radiation.
- these signals are electrical signals if the sensor part ST also has the transmitter 20 and the detector 30.
- the signals emitted by the connection part AT can be generated in this itself or by additional ones Facilities are supplied.
- signals which the connection part AT receives from the sensor part ST can be at least preprocessed in the connection part AT and then passed on to further devices or transmitted directly to other devices for evaluating the measurement signals.
- the bodies 10, which are only schematically described in the figures, can preferably also be designed differently, in particular in the form of an arc, spiral, helix or coil, the light being introduced into the body at one end and being led out or measured at the other end.
- bodies shaped in this way it is possible to maximize the number of internal reflections of the narrowly focused, that is to say as little divergent beam as possible. Over a hundred internal reflections are possible, so that the measurement signal can indicate possible limescale deposits.
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19904280A DE19904280B4 (de) | 1999-02-03 | 1999-02-03 | Vorrichtung und Verfahren zur Ermittlung von Ablagerungen an Glasoberflächen in Spülmaschinen |
| DE19904280 | 1999-02-03 | ||
| PCT/EP2000/000874 WO2000046572A1 (de) | 1999-02-03 | 2000-02-03 | Vorrichtung zum ermitteln von ablagerungen an oberflächen, insbesondere in wasch- und/oder spülmaschinen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1151241A1 true EP1151241A1 (de) | 2001-11-07 |
Family
ID=7896258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00910639A Withdrawn EP1151241A1 (de) | 1999-02-03 | 2000-02-03 | Vorrichtung zum ermitteln von ablagerungen an oberflächen, insbesondere in wasch- und/oder spülmaschinen |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6924499B2 (de) |
| EP (1) | EP1151241A1 (de) |
| DE (1) | DE19904280B4 (de) |
| TR (1) | TR200101907T2 (de) |
| WO (1) | WO2000046572A1 (de) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10053220A1 (de) | 2000-10-26 | 2002-05-08 | Bsh Bosch Siemens Hausgeraete | Verfahren und eine Vorrichtung zum Ermitteln von Ablagerungen von Bestandteilen einer Flüssigkeit an Oberflächen, insbesondere in flüssigkeitsführenden Maschinen |
| DE10135191A1 (de) * | 2001-07-19 | 2003-01-30 | Bsh Bosch Siemens Hausgeraete | Verfahren zum Betreiben eines wasserführenden Haushaltgerätes und Haushaltgerät hierzu |
| DE10203300C1 (de) * | 2002-01-24 | 2003-05-28 | Univ Dresden Tech | Verfahren und Anordnung zum Erkennen klebender Partikel an Oberflächen von Papier, Pappe und in Suspensionen |
| DE10208214B4 (de) * | 2002-02-26 | 2004-09-30 | BSH Bosch und Siemens Hausgeräte GmbH | Vorrichtung zur Überprüfung der Belagbildung und wasserführendes Gerät |
| DE10340748A1 (de) | 2003-08-29 | 2005-03-17 | Robert Bosch Gmbh | Rußpartikelsensor |
| DE20314918U1 (de) * | 2003-09-25 | 2005-02-03 | Scansonic Gmbh | Vorrichtung zur Überwachung eines Schutzglases einer Laseroptik auf Bruch und/oder Verschmutzung |
| DE502004005365D1 (de) * | 2004-09-10 | 2007-12-13 | Cognis Ip Man Gmbh | Verfahren zur quantitativen Messung von Ablagerung auf festen Oberflächen |
| DE102005005039A1 (de) * | 2005-02-03 | 2006-08-10 | BSH Bosch und Siemens Hausgeräte GmbH | Wasserführendes Haushaltgerät |
| DE102007013086A1 (de) * | 2007-03-14 | 2008-09-18 | Sgs Institut Fresenius Gmbh | Vorrichtung und Verfahren zur Erfassung von Verunreinigungen auf einem transparenten Substrat |
| DE202008017432U1 (de) * | 2008-07-23 | 2009-12-03 | BSH Bosch und Siemens Hausgeräte GmbH | Wasserführendes Haushaltsgerät, insbesondere eine Geschirrspülmaschine |
| US8229204B2 (en) * | 2009-06-29 | 2012-07-24 | Ecolab Inc. | Optical processing of surfaces to determine cleanliness |
| US8509473B2 (en) * | 2009-06-29 | 2013-08-13 | Ecolab Inc. | Optical processing to control a washing apparatus |
| US20110094544A1 (en) * | 2009-10-23 | 2011-04-28 | Premark Feg L.L.C. | Warewash machine with soil detection |
| US9420937B2 (en) * | 2009-12-17 | 2016-08-23 | Whirlpool Corporation | Dishwasher with dynamically controlled cycle of operation |
| US9010580B2 (en) | 2010-10-29 | 2015-04-21 | Whirlpool Corporation | Stream detection and/or characterization for beverage dispensing in a refrigerator |
| US8844082B2 (en) | 2010-12-14 | 2014-09-30 | Whirlpool Corporation | Laundry treating appliance with biofilm treating cycle |
| US20120144871A1 (en) * | 2010-12-14 | 2012-06-14 | Whirlpool Corporation | Laundry treating appliance with biofilm treating cycle |
| DE102011084180B3 (de) * | 2011-10-07 | 2013-01-31 | BSH Bosch und Siemens Hausgeräte GmbH | Vorrichtung zur Detektion von Ablagerungen in einem Innenraum eines Haushaltsgeräts und Haushaltsgerät |
| 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 |
| DE102014110034A1 (de) * | 2014-07-17 | 2016-01-21 | Miele & Cie. Kg | Detektion und Schichtdickenbestimmung von Kalk- und/oder Biofilmen in einem Haushaltsgerät |
| US10390675B2 (en) | 2015-06-01 | 2019-08-27 | Illinois Tool Works Inc. | Warewash machine cleaning notification and in-situ dilution process |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0966914A2 (de) * | 1998-06-10 | 1999-12-29 | BSH Bosch und Siemens Hausgeräte GmbH | Verfahren und wasserführendes Haushaltsgerät zur Wasserenthärtung |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7413683A (nl) | 1973-10-29 | 1975-05-02 | Gerhard Karl | Ruitvervuilingsdetectieinrichting. |
| JPS5376889A (en) * | 1976-12-18 | 1978-07-07 | Denki Kagaku Keiki Kk | Sensor for oils* etc* |
| SE7903175L (sv) * | 1979-04-10 | 1980-10-11 | Asea Ab | Fiberoptiskt metdon |
| DE3303221A1 (de) | 1983-02-01 | 1984-08-02 | Bayer Ag, 5090 Leverkusen | Verfahren zur herstellung von isocyanuratgruppen aufweisenden polyisocyanaten, die nach diesem verfahren erhaeltlichen verbindungen und ihre verwendung zur herstellung von polyurethanen |
| US4946242A (en) * | 1987-08-28 | 1990-08-07 | Hitachi, Ltd. | Optical part including integral combination of optical fiber and light emitting or receiving element and method of manufacturing the same |
| US5003823A (en) | 1989-08-21 | 1991-04-02 | Sundstrand Corporation | Noncontact rotating liquid film thickness sensor |
| DE4102146C1 (en) * | 1991-01-25 | 1991-09-26 | Robert Bosch Gmbh, 7000 Stuttgart, De | Rain and dirt sensor for motor vehicle windscreen - uses light source below or at inner side of pane and light measurer at top or outside |
| US5396079A (en) * | 1991-11-19 | 1995-03-07 | Board Of Control Of Michigan Technological University | Fiber optic detector and depth sensor and method for doing same |
| WO1994015819A1 (de) * | 1993-01-13 | 1994-07-21 | Robert Bosch Gmbh | Sensoreinrichtung zur erfassung des benetzungs- und/oder verschmutzungsgrades von scheiben, insbesondere frontscheiben von kraftfahrzeugen |
| US6084519A (en) * | 1993-05-07 | 2000-07-04 | Control Devices, Inc. | Multi-function light sensor for vehicle |
| DE9309837U1 (de) * | 1993-07-02 | 1993-09-02 | Reime, Gerd, 75328 Schömberg | Anordnung zum Messen oder Erkennen der Benetzung einer für eine bestimmte Strahlung durchlässigen Wand oder Platte |
| DE4330710C1 (de) * | 1993-09-10 | 1994-11-17 | Kostal Leopold Gmbh & Co Kg | Optoelektronische Sensoreinrichtung |
| US5694210A (en) | 1996-06-28 | 1997-12-02 | The Board Of Trustees Of The University Of Illinois | Multi-purpose sensor system and sensing method using internally reflected light beams |
| DE19714664C2 (de) * | 1997-04-09 | 2002-11-14 | Zangenstein Elektro | Wasch- oder Spülmaschine mit Trübungssensor |
| DE19721976B4 (de) * | 1997-05-26 | 2008-07-24 | BSH Bosch und Siemens Hausgeräte GmbH | Verfahren zum Feststellen eines unzulässig hohen Verkalkungsgrades in einem wasserführenden Haushaltsgerät |
| US6173609B1 (en) * | 1997-06-20 | 2001-01-16 | Optical Sensor Consultants, Inc. | Optical level sensor |
| US6232603B1 (en) * | 1998-10-29 | 2001-05-15 | Kelsey-Hayes Co. | Rain sensor operation on solar reflective glass |
-
1999
- 1999-02-03 DE DE19904280A patent/DE19904280B4/de not_active Expired - Fee Related
-
2000
- 2000-02-03 TR TR2001/01907T patent/TR200101907T2/xx unknown
- 2000-02-03 WO PCT/EP2000/000874 patent/WO2000046572A1/de not_active Ceased
- 2000-02-03 EP EP00910639A patent/EP1151241A1/de not_active Withdrawn
-
2001
- 2001-08-03 US US09/922,464 patent/US6924499B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0966914A2 (de) * | 1998-06-10 | 1999-12-29 | BSH Bosch und Siemens Hausgeräte GmbH | Verfahren und wasserführendes Haushaltsgerät zur Wasserenthärtung |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO0046572A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20020066873A1 (en) | 2002-06-06 |
| DE19904280B4 (de) | 2005-08-18 |
| DE19904280A1 (de) | 2000-08-24 |
| WO2000046572A1 (de) | 2000-08-10 |
| US6924499B2 (en) | 2005-08-02 |
| TR200101907T2 (tr) | 2001-12-21 |
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