EP2893261B1 - Appareil ménager - Google Patents

Appareil ménager Download PDF

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Publication number
EP2893261B1
EP2893261B1 EP13783672.2A EP13783672A EP2893261B1 EP 2893261 B1 EP2893261 B1 EP 2893261B1 EP 13783672 A EP13783672 A EP 13783672A EP 2893261 B1 EP2893261 B1 EP 2893261B1
Authority
EP
European Patent Office
Prior art keywords
light
unit
sensor
domestic appliance
guiding element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13783672.2A
Other languages
German (de)
English (en)
Other versions
EP2893261A2 (fr
Inventor
Rafael Alonso Esteban
Carlos Heras Vila
Eduardo Imaz Martinez
Sergio Llorente Gil
David Paesa García
Julio Rivera Peman
Iñigo SALINAS ARIZ
Francisco Villuendas Yuste
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2893261A2 publication Critical patent/EP2893261A2/fr
Application granted granted Critical
Publication of EP2893261B1 publication Critical patent/EP2893261B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices
    • F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
    • F24C7/083—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination on tops, hot plates

Definitions

  • the invention relates to a domestic appliance according to the preamble of claim 1.
  • Hobs which use an infrared sensor for temperature determination.
  • a temperature is assigned to a sensor measured value via a calibration table.
  • the object of the invention is, in particular, to provide a generic household appliance with improved properties with regard to improved temperature determination.
  • the object is achieved by the features of claim 1, while advantageous embodiments and modifications of the invention can be taken from the dependent claims.
  • the invention is based on a domestic appliance, in particular hob, with at least one light-guiding element and at least one sensor unit which has at least one light sensor and is intended to detect light transmitted through the light-guiding element and to determine at least one relevant temperature characteristic, the sensor unit being provided for this purpose is to determine a temperature characteristic of a visually arranged behind the light guide object as the relevant temperature characteristic.
  • the sensor unit has at least one further sensor element, which is provided to determine at least one parameter of the at least one light-guiding element, wherein at least one light-guiding element is formed as part of a light-guiding unit, wherein the light-guiding unit is intended to emit light from a first Point to a second point.
  • a “light-conducting element” is to be understood in particular an element which is at least partially transparent to electromagnetic radiation.
  • an element is “partially transparent” for electromagnetic radiation, should be understood in particular that the element at least in a partial region of the electromagnetic radiation, in particular at least in a partial region between 300 nm and 5 microns, advantageously at least in a partial region between 900 nm and 3 ⁇ m, preferably at least in a partial area between 1.2 ⁇ m and 2.6 ⁇ m, in particular a subregion having a width of at least 100 nm, advantageously at least 300 nm, preferably at least 500 nm, a transparency of at least 30%, in particular at least 50%, advantageously at least 70%.
  • a “sensor unit” should in particular be understood to mean a unit which has at least one sensor element.
  • a “sensor element” is to be understood in particular to be an element which is intended to determine a physical variable to be determined, in particular a temperature and / or at least one radiation parameter, in particular a radiation intensity, into at least one other, advantageously electrical parameter, in particular a current , a voltage, a resistance, a capacitance and / or an inductance to convert.
  • the sensor unit has at least one, preferably electrical, evaluation electronics, which are provided to measure the other, preferably electrical characteristic.
  • the transmitter has at least one amplifier circuit.
  • the evaluation is provided to convert the parameter into a evaluable for a control unit, advantageously digital signal.
  • a “light sensor” should in particular be understood to mean a sensor element which is intended to measure at least one characteristic of electromagnetic radiation.
  • the light sensor is intended to measure an intensity of incident infrared radiation.
  • the light sensor is designed as a photodiode.
  • the light sensor is intended to detect light with wavelengths smaller than 4 ⁇ m, in particular smaller than 3 ⁇ m, advantageously smaller than 2.6 ⁇ m.
  • the sensor unit is provided as a relevant temperature parameter to determine a temperature characteristic of an object arranged optically behind the light-guiding element, in particular a cooking utensil and / or cooking product.
  • provided is intended to be understood in particular specially programmed, designed and / or equipped.
  • a "temperature parameter” is to be understood in particular to mean a parameter whose value, at least between -50 ° C. and 500 ° C., in particular at least between 20 ° C. and 250 ° C., can be clearly assigned to a temperature, with a determination tolerance of the temperature characteristic variable a deviation in the temperature determination of a maximum of 10 K, in particular a maximum of 5 K, advantageously at most 1 K leads.
  • the sensor unit is provided to determine a temperature characteristic of the light-guiding element with the aid of the further sensor element.
  • the further sensor element is a temperature sensor, in particular a temperature-dependent resistor, preferably a thermistor, educated.
  • the sensor unit is provided for determining a transmissivity of the light-guiding element with the aid of the further sensor element.
  • a plurality of further sensor elements are provided for a plurality of light-guiding elements.
  • additional parameters such as, in particular, a current temperature of the light-guiding element, can be included in a determination of the relevant temperature characteristic.
  • at least one light-guiding element is designed as a heating zone delimiting unit.
  • the sensor unit has at least one sensor element which is provided to determine at least one parameter, in particular a temperature parameter, of the heating zone delimiting unit.
  • a "heating zone limiting unit” should be understood in particular to mean a unit which is intended to at least partially limit a heating zone, in particular a cooking chamber, for example an oven or a microwave, and / or a cooking zone.
  • the Schuzonenbegrenzungsaku is designed as a disk unit.
  • the light-guiding element is designed as a hob plate.
  • the heating zone limiting unit is at least partially absorbent, in particular tinted, at least in the region of visible light.
  • the light-guiding element has at least one, preferably coloring and / or structuring, coating on a side facing away from a heating zone.
  • the coating is designed as a filter element.
  • the coating is intended to absorb light, at least partially in visible light.
  • the coating is preferably transparent at least in the infrared spectral range, in particular at least between 1.2 and 2.6 ⁇ m, advantageously at least between 1.2 ⁇ m and 1.7 ⁇ m.
  • the invention can be used particularly advantageously, wherein an improved temperature determination is possible.
  • a light-guiding element is formed as part of a light-guiding unit.
  • the sensor unit has at least one sensor element which is provided to determine at least one parameter, in particular a temperature parameter, of the light guide unit.
  • the light guide unit is provided to light from a measuring point to the light sensor and / or to conduct to a beam splitter unit.
  • the measuring point is formed by a surface piece of a, preferably at least partially transparent, heating zone delimiting unit, in particular a hob plate, alternatively a cooking chamber wall.
  • an element is “partially" transparent, it should be understood in particular that the element in at least one spectral range, in particular at least one spectral range having a width of at least 300 nm, advantageously at least 500 nm, preferably at least 900 nm, advantageously in the infrared range Radiation, in particular between 1.2 microns and 1.7 microns, advantageously between 1.2 microns and 2.6 microns, a transparency of at least 30%, in particular at least 50%, advantageously at least 70%.
  • a "light guide unit” is understood to be a unit which is intended to guide light, in particular at least in the infrared spectral range, from a first point to a second point.
  • the first and the second point are at least 5 cm, advantageously at least 10 cm, preferably at least 15 cm away from each other.
  • the light guide unit is provided to adapt a propagation direction of the light.
  • at least one point of the light guide unit is a propagation direction of the light, relative to an inlet direction by at least 10 °, advantageously at least 30 °, preferably at least 80 ° rotated.
  • the light guide unit has at least one reflecting and / or focusing element, in particular a mirror, a prism and / or a lens.
  • the light guide unit is provided to capture light from the measurement point and forward.
  • the light guide unit preferably has at least one optical fiber and / or is formed by it.
  • optical fiber is to be understood, in particular, as a light-conducting element which is designed as a fiber and is intended to achieve lateral light confinement on the basis of total reflection.
  • a fiber is to be understood in particular as meaning a preferably flexible element which has a thickness which corresponds to a maximum of 20%, in particular not more than 10%, advantageously not more than 5%, preferably not more than 1%, of a length of the element.
  • the fiber has an at least oval, preferably circular, cross-section.
  • the glass fiber has a smallest bending radius of not more than 5 cm, in particular not more than 4 cm, advantageously not more than 3 cm.
  • the optical fiber is formed by glass.
  • the optical fiber preferably has a greater refractive index in the center than in at least one edge area.
  • the refractive index, starting from the center to Edge a sloping gradient.
  • the optical fiber has a core fiber with a diameter of at least 200 ⁇ m, in particular at least 300 ⁇ m, advantageously at least 500 ⁇ m.
  • the optical fiber has a numerical aperture of at least 0.1, advantageously at least 0.2, and in particular of at most 0.5, advantageously of at most 0.3.
  • the light guide unit alternatively and / or additionally has at least one prism and / or at least one mirror. In particular, an improved temperature determination can be achieved.
  • the sensor unit has at least one sensor element which is provided to determine at least one parameter, in particular a temperature parameter, of the beam splitter unit and / or of the light guide element of the beam splitter unit.
  • the sensor unit has at least one beam splitter unit which is provided to divide light originating from a measuring point into at least two partial beams and to guide it to at least two different light sensors.
  • the beam splitter unit is provided to divide the radiation simultaneously into at least two partial beams.
  • the beam splitter unit is provided to emit the partial beams at an angle of at least 5 °, advantageously at least 20 °, preferably at least 80 °, and in particular at most 120 ° to each other.
  • the light sensors are optically behind, advantageously arranged directly behind the beam splitter unit, wherein in particular a first of the partial beams falls directly on a first of the light sensors and a second of the partial beams directly on a second of the light sensors.
  • a distance between the beam splitter unit and the light sensor is smaller than 5 cm, in particular smaller than 3 cm, advantageously smaller than 1 cm, preferably smaller is than 0.5 cm.
  • the sensor unit has at least one guide unit which is provided to guide at least a first of the partial beams from the beam splitter unit to a first of the light sensors and / or to guide a second of the partial beams from the beam splitter unit to a second one of the light sensors ,
  • the beam splitter unit has at least one focusing element, in particular a lens, which is intended to form at least one of the partial beams.
  • the Beam splitter unit is provided to the radiation alternately, preferably alternately periodically, in particular with a frequency greater than 1 Hz, in particular greater than 10 Hz, advantageously greater than 100 Hz, preferably greater than 1000 Hz, assign to different partial beams.
  • the beam splitter unit for this purpose has at least one electro-optical element and / or at least one movable, in particular oscillating, tilting and / or rotating, arranged element, in particular a mirror, and an actuator in order to move the movable element.
  • an improved temperature determination can be achieved.
  • the sensor unit has at least one evaluation electronics which is provided to determine a corrected relevant temperature parameter as a function of a value of the parameter which is determined by the further sensor element.
  • the evaluation electronics are provided, assuming a model that takes into account the reflection and / or emission of, in particular infrared, light in, of and / or on the light guide element as a function of a temperature of the light guide, to calculate a corrected relevant temperature characteristic.
  • the transmitter has at least one arithmetic unit, advantageously at least one memory unit and an operating program stored in the memory unit, which is intended to be executed by the arithmetic unit.
  • the evaluation electronics have at least one characteristic matrix stored in the memory unit and / or an especially multidimensional characteristic value function which is provided for characteristic values of the light sensor and the at least one further sensor element, taking into account an extended absorption, reflection and / or emission model to allocate corrected relevant temperature parameter.
  • the transmitter is provided to reflect reflections and multiple reflections within the light guide. In particular, an improved temperature determination can be achieved.
  • the invention is preferably used in cooking appliances, in particular stoves and / or hobs. But in other household appliances in which a non-contact temperature determination is sought, this invention is advantageously used. Further advantages emerge from the following description of the drawing. In the drawing, an embodiment of the invention is shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.
  • FIG. 1 shows a cooking appliance designed as a domestic appliance 10 with four, each as a hob device, trained home appliance devices 12.
  • the domestic appliance 10 is formed as an induction hob.
  • the domestic appliance devices 12 each have a heating element 14, which is arranged below a heating zone limiting unit 16.
  • the heating elements 14 are designed as induction heating elements.
  • the heating zone limiting unit 16 is designed as a cooktop panel formed by glass ceramic.
  • the domestic appliance devices 12 each have a sensor unit 20 which has two light sensors 22, 24 and which is provided to detect light transmitted through a light guide element 17 designed as a heating zone limiting unit 16 in order to determine a relevant temperature characteristic of a cooking utensil 26 set up on the heating zone delimiting unit 16 ( FIG. 2 ).
  • the sensor unit 20 furthermore has a light guide unit 30.
  • the light guide unit 30 has a light guide element 33 designed as an optical fiber 32.
  • the light guide unit 30 has a beam splitter unit 34.
  • the optical fiber 32 is designed to receive light from a measurement point on the underside of the heating zone delimiting unit 16 and to conduct it to the beam splitter unit 34.
  • the optical fiber 32 has a core diameter of 1 mm and a numerical Aperture of 0.22 on.
  • the optical fiber 32 is arranged in a bushing 36 in the heating element 14.
  • the passage 36 is disposed near a center of the heating element 14.
  • the beam splitter unit 34 is provided to generate from the light which is guided by the optical fiber 32 to the beam splitter unit 34, two partial beams, which are the light sensors 22, 24 of the sensor unit 20, respectively.
  • the beam splitter unit 34 has a light-conducting element 39 designed as a partially transmissive mirror 38, which is provided to generate the two partial beams.
  • a filter unit is arranged, which is provided to filter the partial beams differently.
  • the sensor unit 20 has three further sensor elements 40, 42, 44, which are provided to determine at least temperature characteristics of the light-guiding elements 17, 33, 39.
  • a first of the further sensor elements 40 is designed as a PTC thermistor.
  • the first further sensor element 40 is arranged on an underside of the heating zone delimiting unit 16 next to the heating element 14.
  • the first sensor element 40 is provided to determine a temperature of the heating zone limiting unit 16.
  • a second of the further sensor elements 42 is provided to determine a temperature of the optical fiber 32.
  • the second further sensor element 42 is designed as a thermistor.
  • a third of the sensor elements 44 is provided to determine a temperature of the partially transmissive mirror 38.
  • the third sensor element 44 is designed as a PTC thermistor.
  • the light sensors 22, 24 have temperature sensors 23, 25, which are provided to determine temperatures of the light sensors 22, 24, in order to determine a dark current, which falsifies a measured value of the light sensors 22, 24 designed as infrared photodiodes.
  • the sensor unit 20 has evaluation electronics 50 which are provided to determine a corrected relevant temperature parameter as a function of a value of the parameter which is determined by the further sensor elements 40, 42, 44.
  • the evaluation electronics 50 are provided for direct transmission T 0 of radiation emitted by the cooking utensil 26 through the light guide element 17, direct emission E 0 from the light guide element 17, indirect emission E n from the light guide element 17 and indirect transmission T n through the light guide element 17 to take into account ( FIG. 3 ).
  • two light guide units are used instead of a light guide unit in combination with a beam splitter unit or it is measured with only one sensor element and / or it is dispensed with a light guide unit or an optical fiber.
  • only one or two, or even more than three further sensor elements are provided in order to determine parameters, in particular temperature characteristics of the light-guiding elements.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Radiation Pyrometers (AREA)
  • Induction Heating Cooking Devices (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Claims (7)

  1. Appareil ménager, notamment table de cuisson, comportant au moins un dispositif d'appareil ménager (12) qui comprend au moins un élément guide de lumière (17, 33, 39) et au moins une unité de capteur (20) qui comprend au moins un capteur de lumière (22, 24) et qui est conçue pour détecter la lumière transmise par l'élément guide de lumière (17, 33, 39) et pour déterminer au moins une grandeur caractéristique de température, dans lequel l'unité de capteur (20) est conçue pour déterminer, en tant que grandeur caractéristique de température correspondante, une grandeur caractéristique de température d'un objet disposé optiquement derrière l'élément guide de lumière (17, 33, 39), et dans lequel au moins un élément guide de lumière (33) est formé en tant que partie d'une unité de guidage de lumière (30), l'unité de guidage de lumière (30) étant conçue pour guider de la lumière d'un premier point jusqu'à un second point,
    caractérisé en ce que l'unité de capteur (20) comprend au moins un autre élément capteur (40, 42, 44) agencé pour déterminer au moins une grandeur caractéristique du au moins un élément guide de lumière (17, 33, 39).
  2. Appareil ménager selon la revendication 1, caractérisé en ce qu'au moins un élément guide de lumière (17) est configuré sous forme d'unité de délimitation de zones de chauffage (16).
  3. Appareil ménager selon la revendication 2, caractérisé en ce que l'élément guide de lumière (17) est configuré sous forme de plaque de cuisson.
  4. Appareil ménager selon l'une des revendications 1 à 3, caractérisé en ce que l'élément guide de lumière (33) est configuré sous forme de fibre optique (32).
  5. Appareil ménager selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins un élément guide de lumière (39) est configuré sous forme de partie d'une unité de séparateur de faisceau (34).
  6. Appareil ménager selon l'une quelconque des revendications précédentes, caractérisé en ce que l'autre élément capteur (40, 42, 44) est au moins configuré pour déterminer une grandeur caractéristique de température de l'élément guide de lumière (17, 33, 39).
  7. Appareil ménager selon l'une quelconque des revendications précédentes, caractérisé en ce que l'unité de capteur (20) comprend au moins un circuit électronique d'évaluation (50), qui est configuré pour déterminer une grandeur caractéristique de température correspondante corrigée en fonction d'une valeur de la grandeur caractéristique qui est déterminée par l'autre élément capteur (40, 42, 44).
EP13783672.2A 2012-09-03 2013-08-22 Appareil ménager Active EP2893261B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES201231357 2012-09-03
PCT/IB2013/056798 WO2014033593A2 (fr) 2012-09-03 2013-08-22 Dispositif d'appareil ménager

Publications (2)

Publication Number Publication Date
EP2893261A2 EP2893261A2 (fr) 2015-07-15
EP2893261B1 true EP2893261B1 (fr) 2019-04-03

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ID=49510453

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13783672.2A Active EP2893261B1 (fr) 2012-09-03 2013-08-22 Appareil ménager

Country Status (4)

Country Link
US (1) US9976751B2 (fr)
EP (1) EP2893261B1 (fr)
ES (1) ES2725572T3 (fr)
WO (1) WO2014033593A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10624353B1 (en) 2015-03-12 2020-04-21 John Langley Pizza oven
US10533754B2 (en) * 2015-03-13 2020-01-14 Whirlpool Corporation Pot support grate
US11224228B1 (en) 2020-06-18 2022-01-18 John Langley Three sensor oven

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19654773C1 (de) * 1996-12-31 1998-04-23 Schott Glaswerke Verfahren und Vorrichtung zur betrieblichen Messung der Temperatur in mindestens einer Kochzone eines Kochfeldes mit einer Glaskeramikplatte
US6375350B1 (en) * 2000-08-08 2002-04-23 Quantum Logic Corp Range pyrometer
JP2003347028A (ja) * 2002-05-24 2003-12-05 Matsushita Electric Ind Co Ltd 調理器
DE102006026907A1 (de) * 2006-06-09 2008-01-03 BSH Bosch und Siemens Hausgeräte GmbH Induktionskochmulde und Verfahren zur Ermittlung einer Temperatur eines Bodens eines Zubereitungsbehälters
ES2659989T3 (es) * 2006-12-18 2018-03-20 Panasonic Corporation Dispositivo de cocina de calentamiento por inducción

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
US20150253014A1 (en) 2015-09-10
ES2725572T3 (es) 2019-09-24
WO2014033593A3 (fr) 2014-05-08
US9976751B2 (en) 2018-05-22
WO2014033593A2 (fr) 2014-03-06
EP2893261A2 (fr) 2015-07-15

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