EP2108298B1 - Haushaltsanwendung mit einem Fluidsystem und Vorrichtung zur Erkennung einer Wärme- und/oder Infrarotstrahlung - Google Patents

Haushaltsanwendung mit einem Fluidsystem und Vorrichtung zur Erkennung einer Wärme- und/oder Infrarotstrahlung Download PDF

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Publication number
EP2108298B1
EP2108298B1 EP08006949.5A EP08006949A EP2108298B1 EP 2108298 B1 EP2108298 B1 EP 2108298B1 EP 08006949 A EP08006949 A EP 08006949A EP 2108298 B1 EP2108298 B1 EP 2108298B1
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EP
European Patent Office
Prior art keywords
fluid
sensor element
household appliance
radiation
thermal 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.)
Not-in-force
Application number
EP08006949.5A
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English (en)
French (fr)
Other versions
EP2108298A1 (de
Inventor
Jiri Bohac
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
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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.)
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Publication date
Application filed by Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to EP08006949.5A priority Critical patent/EP2108298B1/de
Priority to PL08006949.5T priority patent/PL2108298T3/pl
Publication of EP2108298A1 publication Critical patent/EP2108298A1/de
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Publication of EP2108298B1 publication Critical patent/EP2108298B1/de
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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
    • A47L15/4287—Temperature measuring or regulating arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/22—Condition of the washing liquid, e.g. turbidity
    • D06F34/24—Liquid temperature
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/16—Washing liquid temperature
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/64—Radiation, e.g. microwaves
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/28—Electric heating
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/58—Indications or alarms to the control system or to the user

Definitions

  • the present invention relates to a household appliance and a method for detecting a thermal radiation.
  • the temperature of the fluid is detected by one or more sensor elements, which are in a direct contact with the fluid.
  • the sensor element may be a temperature sensitive electric or electronic element, in particular a temperature sensitive resistor or transistor element.
  • the sensor element is an NTC (negative temperature coefficient) sensor.
  • the sensor element is arranged in a fixed position within the fluid system.
  • the sensor element requires electric connectors and wires in order to send signals out of the fluid system.
  • the passageway for the wires through the wall of the fluid system risks a leakage in said wall.
  • the sensor element and the wires have to be isolated.
  • the temperature sensitive element reacts very slowly on a change of the temperature of the fluid.
  • the US 5,739,534 describes a system for detecting the presence of a fluid in a washing machine.
  • the system comprises means for transmitting two or more infrared signals towards the fluid.
  • the infrared signals have different wavelengths.
  • the system comprises means for detecting the infrared signals reflected on the fluid. By comparing the intensities of the infrared signals the presence of said fluid is determined.
  • a microwave clothes dryer comprising an infrared sensor the occurrence of heating which might lead to an outbreak of a fire in the clothes.
  • the dryer comprises means for introducing water into the chamber of the dryer to wet the clothes.
  • WO 00/34839 A1 discloses en electrical thermal appliance with remotely mounted temperature sensor.
  • WO 02/42689 A1 discloses a bolometric humidity sensor and cooker using the same.
  • JP 06 126099 A discloses a laundry dryer with an infrared sensor, which senses the temperature of the hot air.
  • US 5 291 626 A discloses a dishwasher that comprises a sensor for detecting electromagnetic radiation of the liquid.
  • a core idea of the present invention is to detect the thermal radiation of the fluid or fluid mixture in the fluid system of the household appliance (or: domestic appliance, home appliance) in order to obtain information about the temperature and/or other thermal quantities of the fluid, such as the radiation intensity.
  • the present invention allows a contact less detection or determination or measuring of the temperature and/or other thermal quantities of the fluid or fluid mixture since the thermal radiation detecting device does not have to be in contact and typically is not in contact with the fluid or fluid mixture when the thermal radiation from the fluid or fluid mixture is detected.
  • the contact less measuring or determining of the temperature by detecting thermal radiation allows in particular that the radiation detecting device can be arranged outside of or separated from the fluid system of the appliance and that no electric connectors within the fluid system and no passageway for the wires in the wall of the fluid system are required so that there are no risks for a leakage in said wall.
  • the detection of the thermal radiation of the fluid or fluid mixture can also be indirect in the sense that the thermal radiation of a body, wall or container such as a tub of a washing machine or dish washer or pipe being in thermal contact with the fluid or fluid mixture is detected.
  • thermal radiation includes radiation, in particular electromagnetic radiation, of longer wavelength than visible light such as infrared radiation or radiation from the infrared spectrum as well as even longer wavelengths such as radiation from the microwave or even radio wavelength spectrum, e.g. wavelengths from typically 0.8 mm up to 1000 mm, in particular radiation in the wavelength range between 1 pm and 100 ⁇ m for temperatures in a temperature range up to about 100 °C.
  • the radiation detecting device comprises at least one thermoelectric sensor element and/or pyroelectric sensor element and/or Bolometer and/or, preferably, thermopile sensor element.
  • thermopile sensors are known as such for contact less measuring of temperature, for instance from EP 1 296 122 B1 , the disclosure of which is enclosed into the present application herewith by reference.
  • a thermopile sensor element has the advantage that it reacts very fast on a change of the temperature of the fluid, at least much faster than the known NTC elements, and, thus, the control or surveillance of the temperature of the fluid can be improved and is reliable even when the fluid flows (inline measurement).
  • thermopile sensor element is, in one embodiment, provided to detect the intensity of the thermal radiation from the fluid.
  • radiation detecting device in particular thermopile sensor element, may be provided to detect the temperature of the fluid directly or indirectly via the detected or measured radiation.
  • the temperature of the fluid may be determined from the intensity of the thermal radiation.
  • the fluid system comprises at least one transparent or transmissive device which is transmissive for infrared and/or thermal radiation, in particular thermal radiation as defined above, and arranged between the radiation detecting device or sensor element, in particular thermopile sensor element, and the fluid or fluid mixture.
  • the radiation detecting device, in particular thermopile sensor element may be positioned at a distance or separated from the fluid.
  • the transmissive device may border or enclose at least partially the fluid or may be formed as a window arranged in a wall of the fluid system allowing for the detection of the temperature of the fluid in a certain position of the fluid system.
  • the transmissive device is a pipe or a pipe section of the fluid system.
  • the transmissive pipe may be made of one single piece and can be easily produced.
  • the transmissive device is made of a glass or plastic material that is suitably transmissive for the thermal radiation.
  • the radiation detecting device in particular its sensor element such as thermopile sensor element, is preferably sensitive for infrared radiation or in the infrared spectrum.
  • the infrared radiation from the fluid provides reliable information about the temperature of the fluid.
  • the household appliance comprises at least one electronic circuit connected to the sensor element.
  • the electronic circuit may be provided for receiving electric signals from the sensor element.
  • the electric signals correspond to the intensity of the thermal radiation from the fluid to sensor element.
  • the electronic circuit may transform the electric signals into a value of the actual temperature of the fluid.
  • the electric signals correspond to the temperature of the fluid.
  • the information about the temperature may be used for controlling the household appliance. If the fluid is behind or on the other side of the transmissive device, then the electric signals may correspond to the temperature of the fluid behind said transmissive device.
  • the electronic circuit may be provided for processing the electric signals from the sensor element and/or for controlling the household appliance.
  • heating elements of the household appliance may be controlled in order to obtain a predetermined temperature of the fluid.
  • the electronic circuit and the sensor element may be placed at the same position in the household appliance. Especially, the electronic circuit and the sensor element form a single structural member of the household appliance. This simplifies the production of the household appliance.
  • the household appliance may comprise at least one output device for displaying the actual temperature value of the fluid. This output device allows that the operator may be always informed about the actual temperature value of the fluid.
  • thermopile sensor element is arranged in an inter-visibility of the fluid during detecting the thermal radiation of the fluid.
  • FIG 1 illustrates a schematic diagram of an apparatus or a device for detecting a thermal radiation 14 of a fluid 20 within a household appliance such as a dish washer or a washing machine or a condensation laundry dryer or a steam cooking oven or water heater or iron, according to a first embodiment of the present invention.
  • the apparatus comprises a thermopile sensor element 10, an electronic circuit 12 and a transmissive or transparent device 18.
  • the transparent device is formed as a window 18 within a pipe 16.
  • the thermopile sensor element 10 is an infrared sensitive sensor element, typically sensing thermal radiation in the wavelength range between 1 ⁇ m and 100 ⁇ m for temperatures in a temperature range up to about 100 °C.
  • the apparatus is arranged or installable in a household appliance with a system containing a running and/or stationary fluid 20.
  • the pipe 16 forms a part of a circulation system in the household appliance.
  • the circulation system contains the fluid 20.
  • the fluid 20 irradiates the thermal radiation 14.
  • the thermal radiation 14 is substantially an infrared radiation.
  • the intensity of the thermal radiation 14 depends on the temperature of the fluid 20.
  • the window 18 is integrated in the wall of the pipe 16.
  • the window 18 is made of a transparent material, like glass or plastic.
  • the window 20 is transparent for the thermal radiation 14.
  • the window 18 and the thermopile sensor element 10 are arranged in a position, that there is intervisibility between the fluid 20 and the thermopile sensor element 10. Thus, the thermopile sensor element 10 is able to detect the thermal radiation 14 from the fluid 20.
  • thermopile sensor element 10 is electrically connected to the electronic circuit 12.
  • the thermopile sensor element 10 sends electric signals to the electronic circuit 12. Said electric signals depend on the thermal radiation 14 and therefore on the temperature of the fluid 20.
  • the electronic circuit 12 is provided to process the signals from the thermopile sensor element 10. Further, the electronic circuit 12 may be provided to control the household appliance.
  • the apparatus may comprise a displaying device in order to indicate the temperature of the fluid 20.
  • a displaying device in order to indicate the temperature of the fluid 20.
  • FIG 2 illustrates a schematic diagram of the apparatus for detecting the thermal radiation 14 of the fluid 20 within the household appliance according to a second embodiment of the present invention.
  • the second embodiment of the apparatus comprises also the thermopile sensor element 10 formed as an infrared sensitive sensor element as well as the electronic circuit 12.
  • the apparatus of the second embodiment is arranged or installable in the household appliance with the system containing a running and/or stationary fluid 20.
  • the apparatus comprises a transparent pipe 22 or pipe section.
  • the transparent pipe 22 or pipe section, respectively, forms a part of the circulation system in the household appliance.
  • the transparent pipe 22 is permeable for the thermal radiation 14 of the fluid 20.
  • the pipe 16 comprises-the transparent window 18
  • the pipe 22 itself is transparent.
  • the pipe 22 and the pipe section may be made of the transparent material, like special transparent glass or plastic. Said material is transparent for the thermal radiation 14.
  • the pipe 22 or pipe section, respectively, is also arranged in the position, that there is intervisibility between the fluid 20 and the thermopile sensor element 10. This allows the thermopile sensor element 10 to detect the thermal radiation 14 from the fluid 20.
  • the household appliance with the apparatus according to the present invention allows a contact less detection of the temperature of the fluid 20.
  • the invention requires no holes in the pipe 16 and 22. Thus, there is no risk of a leakage in the pipe 16 and 22 because of the temperature sensor element 10.
  • thermopile sensor element 10 can be arranged in every position, where the inter-visibility between the thermopile sensor element 10 and the window 18 or the transparent pipe 22, respectively, exists.
  • the thermopile sensor element 10 may be arranged in a relative long distance from the fluid.
  • the thermopile sensor element 10 may be placed on or besides the electronic circuit 12.
  • thermopile sensor element 10 causes no parasitic capacities.
  • thermopile sensor element 10 causes no problems for the electromagnetic compatibility.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Radiation Pyrometers (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Claims (9)

  1. Haushaltsgerät, insbesondere ein Geschirrspüler, eine Waschmaschine, ein Kondensationswäschetrockner oder ein Dampfgarofen, das Folgendes umfasst:
    ein Fluidsystem, das ein fließendes und/oder stationäres Fluid (20) oder eine Fluidmischung enthält, und
    eine Strahlungsdetektionsvorrichtung zum Detektieren einer thermischen Strahlung (14) von dem Fluid (20) oder der Fluidmischung, um die Temperatur des Fluids (20) oder der Fluidmischung zu bestimmen,
    wobei das Fluidsystem wenigstens eine durchlässige Vorrichtung (18; 22) umfasst, die zwischen der Strahlungsdetektionsvorrichtung (10) und dem Fluid (20) oder der Fluidmischung angeordnet ist und die aus einem Material hergestellt ist, das für die thermische Strahlung (14) des Fluids oder der Fluidmischung durchlässig ist, insbesondere ein Glas oder ein Kunststoff oder ein Polymermaterial,
    dadurch gekennzeichnet, dass die wenigstens eine durchlässige Vorrichtung ein Rohr (22) oder ein Rohrabschnitt des Fluidsystems ist.
  2. Haushaltsgerät nach Anspruch 1, wobei das Fluidsystem ein geschlossenes System oder ein Kreislaufsystem ist.
  3. Haushaltsgerät nach Anspruch 1 oder 2, wobei die Strahlungsdetektionsvorrichtung wenigstens ein thermoelektrisches Sensorelement oder ein pyroelektrisches Sensorelement oder ein bolometrisches Sensorelement oder ein Thermosäulen-Sensorelement (10) ist.
  4. Haushaltsgerät nach einem der vorhergehenden Ansprüche, wobei die Strahlungsdetektionsvorrichtung, insbesondere das Thermosäulen-Sensorelement (10), vorgesehen ist, um die Intensität der thermischen Strahlung von dem Fluid (20) oder der Fluidmischung zu detektieren, um die Temperatur aus der detektierten Intensität abzuleiten oder um direkt die Temperatur des Fluids oder der Fluidmischung zu detektieren.
  5. Haushaltsgerät nach einem der vorhergehenden Ansprüche, wobei die Strahlungsdetektionsvorrichtung, insbesondere das Thermosäulen-Sensorelement (10), Infrarotstrahlung (14) erfassen kann.
  6. Haushaltsgerät nach Anspruch 3 oder 4, wobei die Strahlungsdetektionsvorrichtung wenigstens eine elektronische Schaltung (12) umfasst, die mit dem wenigstens einen Sensorelement, insbesondere dem Thermosäulen-Sensorelement (10), verbunden ist und/oder dafür vorgesehen ist, elektrische Signale von diesem zu empfangen, und/oder zur Steuerung des Haushaltsgeräts, insbesondere einer Heizvorrichtung zum Erwärmen des Fluids oder der Fluidmischung, vorgesehen ist, wobei vorzugsweise die elektronische Schaltung (12) und das Sensorelement (10) an derselben Position in dem Haushaltsgerät angeordnet sind und/oder ein einteiliges Strukturelement des Haushaltsgeräts bilden.
  7. Haushaltsgerät nach einem der vorhergehenden Ansprüche, das wenigstens eine Ausgabevorrichtung zum Anzeigen des tatsächlichen Temperaturwerts des Fluids (20) oder der Fluidmischung umfasst.
  8. Verfahren zum Detektieren einer thermischen Strahlung (14) eines fließenden und/oder stationären Fluids (20) oder einer Mischung, die ein Fluid enthält, in einem geschlossenen oder wenigstens teilweise geschlossenen Fluidsystem eines Haushaltsgeräts mit einer Vorrichtung zum Detektieren einer thermischen Strahlung (14) mit wenigstens einem Thermosäulen-Sensorelement (10), wobei das Fluidsystem wenigstens eine durchlässige Vorrichtung (18; 22) umfasst, die zwischen dem Thermosäulen-Sensorelement (10) und dem Fluid (20) angeordnet ist, und wobei das Thermosäulen-Sensorelement (10) während des Detektierens der thermischen Strahlung (14) des Fluids (20) in einem direkten Sichtkontakt mit dem Fluid (20) angeordnet ist, dadurch gekennzeichnet, dass die wenigstens eine durchlässige Vorrichtung ein Rohr oder ein Rohrabschnitt des Fluidsystems ist.
  9. Verfahren nach Anspruch 8, das in einem Haushaltsgerät nach einem der Ansprüche 1 bis 7 durchgeführt wird.
EP08006949.5A 2008-04-08 2008-04-08 Haushaltsanwendung mit einem Fluidsystem und Vorrichtung zur Erkennung einer Wärme- und/oder Infrarotstrahlung Not-in-force EP2108298B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP08006949.5A EP2108298B1 (de) 2008-04-08 2008-04-08 Haushaltsanwendung mit einem Fluidsystem und Vorrichtung zur Erkennung einer Wärme- und/oder Infrarotstrahlung
PL08006949.5T PL2108298T3 (pl) 2008-04-08 2008-04-08 Urządzenie gospodarstwa domowego z systemem płynowym oraz urządzenie do wykrywania promieniowania cieplnego i/lub podczerwonego

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08006949.5A EP2108298B1 (de) 2008-04-08 2008-04-08 Haushaltsanwendung mit einem Fluidsystem und Vorrichtung zur Erkennung einer Wärme- und/oder Infrarotstrahlung

Publications (2)

Publication Number Publication Date
EP2108298A1 EP2108298A1 (de) 2009-10-14
EP2108298B1 true EP2108298B1 (de) 2016-03-16

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EP08006949.5A Not-in-force EP2108298B1 (de) 2008-04-08 2008-04-08 Haushaltsanwendung mit einem Fluidsystem und Vorrichtung zur Erkennung einer Wärme- und/oder Infrarotstrahlung

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EP (1) EP2108298B1 (de)
PL (1) PL2108298T3 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014218254A1 (de) * 2014-09-11 2016-03-17 BSH Hausgeräte GmbH Kondensationstrockner mit einem Temperatursensor, sowie Verfahren zu seinem Betreiben

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5291626B1 (en) 1992-05-01 1996-05-21 Gen Electric Machine for cleansing articles
JPH06126099A (ja) 1992-10-19 1994-05-10 Sharp Corp 衣類乾燥機
GB2283083B (en) * 1994-01-08 1997-06-11 David Liell System manager for heating apparatus
SG86341A1 (en) 1998-12-08 2002-02-19 Koninkl Philips Electronics Nv Electric thermal appliance with remotely mounted temperature sensor
US6401357B1 (en) * 2000-06-13 2002-06-11 Electric Power Research Institute, Inc. End of cycle detector and method for microwave clothes dryer
EP1954099A1 (de) 2000-11-21 2008-08-06 LG Electronics, Inc. Bolometrischer Feuchtigkeitssensor und Kocher damit und Verfahren zur Kochersteuerung

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EP2108298A1 (de) 2009-10-14
PL2108298T3 (pl) 2016-09-30

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