EP2893261A2 - Hausgerätevorrichtung - Google Patents
HausgerätevorrichtungInfo
- Publication number
- EP2893261A2 EP2893261A2 EP13783672.2A EP13783672A EP2893261A2 EP 2893261 A2 EP2893261 A2 EP 2893261A2 EP 13783672 A EP13783672 A EP 13783672A EP 2893261 A2 EP2893261 A2 EP 2893261A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- unit
- sensor
- domestic appliance
- light guide
- 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.)
- Granted
Links
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 household appliance device 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 device with improved properties in terms of improved temperature determination.
- the object is achieved by the features of
- Patent claim 1 solved, while advantageous embodiments and modifications of the invention can be taken from the dependent claims.
- the invention relates to a home appliance device, in particular one
- Hob device with at least one light guide and at least one
- Sensor unit having at least one light sensor and is provided to detect light transmitted through the light guide element and to determine at least one 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.
- a “light-guiding element” is to be understood as meaning, in particular, an element that is at least partially transparent to electromagnetic radiation, In particular that an element is “partially transparent” for electromagnetic radiation, it should be understood that the element is at least partially submerged in the electromagnetic field
- electromagnetic radiation in particular at least in a partial region between 300 nm and 5 ⁇ m, advantageously at least in a partial region between 900 nm and 3 ⁇ m, preferably at least in a partial region 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” is to be understood as meaning in particular a unit which has at least one sensor element.
- Sensor element is to be understood in particular as an element which is intended to have a physical variable to be determined, in particular a temperature and / or at least one radiation parameter , in particular one
- Radiation intensity in at least one other, advantageously electrical characteristics, 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 sensor unit has at least one, preferably electrical, evaluation electronics, which are provided to measure the other, preferably electrical characteristic.
- a "light sensor” is to be understood as meaning, in particular, a sensor element which is intended to measure at least one characteristic of electromagnetic radiation
- Light sensor designed to measure an intensity of incident infrared radiation.
- the light sensor is designed as a photodiode.
- the light sensor is intended to light with wavelengths less than 4 ⁇ , in particular less than 3 ⁇ , advantageously less than 2.6 ⁇ to detect.
- the sensor unit is provided as a relevant temperature parameter, a
- Temperature characteristic of an optically arranged behind the light guide object in particular a cooking utensil and / or food to be determined.
- “provided” is meant in particular specially programmed, designed and / or equipped "temperature characteristic” is to be understood in particular 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, wherein a determination tolerance of the temperature characteristic to 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 with the aid of the further sensor element to a temperature characteristic of the light guide
- 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.
- Light guide provided.
- an improved measurement can be achieved by the embodiment according to the invention.
- 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 guide element as
- Heating zone limiting unit is formed.
- 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” is to be understood in particular as meaning a unit which is intended to be a heating zone, in particular a heating zone
- Cooking chamber for example, an oven or a microwave, and / or a
- Cooking zone at least partially limit.
- Advantageous is the
- Heating zone limiting unit designed as a plate unit.
- the light-guiding element is designed as a hob plate.
- the hob plate is designed as a plate unit.
- Heating zone limiting unit at least partially absorbing at least in the range of visible light, in particular tinted.
- 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 invention can be used particularly advantageously, wherein an improved temperature determination is possible.
- At least one light-guiding element as part of a
- Light guide unit is formed.
- 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 direct to a beam splitter unit.
- the measuring point is from a surface piece of a, preferably at least partially transparent,
- an 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 ⁇ m and 1.7 ⁇ m, advantageously between 1.2 ⁇ m and 2.6 ⁇ m, has a transparency of at least 30%, in particular at least 50%, advantageously at least 70%, below a "light guide unit". In particular, it is intended to mean a unit intended to provide light,
- 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.
- Light guide unit a propagation direction of the light, relative to an inlet direction by at least 10 °, preferably 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 intended to receive light from the
- the light guide unit preferably has at least one optical fiber and / or is formed by it. Under one
- optical fiber it is meant, in particular, a light-conducting element which is designed as a fiber and is intended to achieve lateral light confinement based on total reflection not more than 20%, in particular not more than 10%, advantageously not more than 5%, preferably not more than 1%, corresponds to 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, in particular 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 region Edge, a sloping gradient.
- the optical fiber has a core fiber with a diameter of at least 200 ⁇ , in particular at least 300 ⁇ , advantageously at least 500 ⁇ on.
- 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.
- Light guide unit alternatively and / or additionally at least one prism and / or at least one mirror. It can be improved in particular
- At least one light-guiding element as part of a
- 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 light sensor is arranged "directly" behind the beam splitter unit, it should be understood in particular that 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 greater than 0.5 cm
- the sensor unit at least one
- Partial beams from the beam splitter unit to lead 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 of the light sensors.
- the beam splitter unit has at least one
- 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, depending on a value of the parameter, which is determined by the further sensor element, a corrected relevant
- 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 a characteristic value function, in particular a multi-dimensional characteristic, which is provided for taking characteristic values of the light sensor and the at least one further sensor element into consideration 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 also in other home appliances, where a non-contact
- Fig. 1 shows a cooking hob according to the invention in a schematic view
- FIG. 1 shows a domestic appliance 10, designed as a hob, with four, in each case as
- the domestic appliance 10 is designed 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.
- Heating zone delimiting unit 16 is formed as a cooktop panel formed of glass ceramic.
- the home appliance devices 12 each have a sensor unit 20, which has two light sensors 22, 24 and which is provided by a as
- the sensor unit 20 furthermore has a light guide unit 30.
- Light guide unit 30 has a light guide element 33 designed as an optical fiber 32. Furthermore, the light guide unit 30 has a beam splitter unit 34. The
- Optical fiber 32 is intended to receive light from a measurement point on the underside of the heating zone delimiting unit 16 and to guide 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 in a bushing 36 in the
- Heating element 14 is arranged.
- the bushing 36 is near a center of the
- Heating element 14 is arranged.
- 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 trained as a partially transparent mirror 38
- Light guide 39 which is intended to generate the two partial beams.
- the filter 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 a temperature of
- the third sensor element 44 is designed as a PTC thermistor. Furthermore, 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 a
- Evaluation electronics 50 which is provided, depending on a value of the characteristic, which are determined by the further sensor elements 40, 42, 44, to determine a corrected relevant temperature characteristic.
- 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 ( Figure 3).
- two light guide units instead of one
- Light guide unit used in combination with a beam splitter unit or it is measured with only one sensor element and / or it is on a
- Light guide unit or an optical fiber omitted. Furthermore, it is conceivable that 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.
Landscapes
- 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)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES201231357 | 2012-09-03 | ||
| PCT/IB2013/056798 WO2014033593A2 (de) | 2012-09-03 | 2013-08-22 | Hausgerätevorrichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2893261A2 true EP2893261A2 (de) | 2015-07-15 |
| EP2893261B1 EP2893261B1 (de) | 2019-04-03 |
Family
ID=49510453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13783672.2A Active EP2893261B1 (de) | 2012-09-03 | 2013-08-22 | Hausgerät |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US9976751B2 (de) |
| EP (1) | EP2893261B1 (de) |
| ES (1) | ES2725572T3 (de) |
| WO (1) | WO2014033593A2 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10624353B1 (en) | 2015-03-12 | 2020-04-21 | John Langley | Pizza oven |
| EP3268669B1 (de) * | 2015-03-13 | 2020-04-22 | Whirlpool EMEA S.p.A | Topftragrost |
| US11224228B1 (en) | 2020-06-18 | 2022-01-18 | John Langley | Three sensor oven |
Family Cites Families (5)
| 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 |
| RU2449509C2 (ru) * | 2006-12-18 | 2012-04-27 | Панасоник Корпорэйшн | Устройство для приготовления пищи индукционным нагревом |
-
2013
- 2013-08-22 US US14/423,146 patent/US9976751B2/en not_active Expired - Fee Related
- 2013-08-22 WO PCT/IB2013/056798 patent/WO2014033593A2/de not_active Ceased
- 2013-08-22 ES ES13783672T patent/ES2725572T3/es active Active
- 2013-08-22 EP EP13783672.2A patent/EP2893261B1/de active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2014033593A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014033593A2 (de) | 2014-03-06 |
| EP2893261B1 (de) | 2019-04-03 |
| US20150253014A1 (en) | 2015-09-10 |
| US9976751B2 (en) | 2018-05-22 |
| ES2725572T3 (es) | 2019-09-24 |
| WO2014033593A3 (de) | 2014-05-08 |
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