EP2649860B1 - Dispositif de chauffage pour un appareil électroménager et appareil électroménager équipé de ce dispositif de chauffage - Google Patents

Dispositif de chauffage pour un appareil électroménager et appareil électroménager équipé de ce dispositif de chauffage Download PDF

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Publication number
EP2649860B1
EP2649860B1 EP11791274.1A EP11791274A EP2649860B1 EP 2649860 B1 EP2649860 B1 EP 2649860B1 EP 11791274 A EP11791274 A EP 11791274A EP 2649860 B1 EP2649860 B1 EP 2649860B1
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EP
European Patent Office
Prior art keywords
substrate
heating device
layer
recess
temperature
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
EP11791274.1A
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German (de)
English (en)
Other versions
EP2649860A1 (fr
Inventor
Ingo Bally
Alexander Dinkel
Wolfgang Fuchs
Claudia Leitmeyr
Angelika Namberger
Michael Reindl
Klemens Roch
Wolfgang Schnell
Matthias Sorg
Günter ZSCHAU
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
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BSH Hausgeraete GmbH
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Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to PL11791274T priority Critical patent/PL2649860T3/pl
Publication of EP2649860A1 publication Critical patent/EP2649860A1/fr
Application granted granted Critical
Publication of EP2649860B1 publication Critical patent/EP2649860B1/fr
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/72—Plates of sheet metal
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/07—Heating plates with temperature control means

Definitions

  • the invention relates to a heating device for a household appliance, wherein the heating device has a substrate to be heated with a use side and a rear side facing away from the use side, at least one surface heating, which is arranged on the back of the substrate, and at least one temperature sensor.
  • the invention also relates to a household appliance with at least one such heating device.
  • the at least one temperature sensor is attached to the surface heating.
  • the at least one temperature sensor is typically used for temperature control of one of the use side directly or spaced facing medium (food, liquor, process air, etc.).
  • characteristic curves are often used to determine a temperature at the use side, which information about an experimentally determined difference between the temperature at the heater of the temperature the usage side depending on one or more variables (eg the temperature at the heater).
  • DE 20 32 151 A1 discloses an electric heater with a flat support body made of inorganic material, such as glass ceramic, fused silica, porcelain, the upper side has at least one heating surface for receiving the material to be heated, wherein the support body is formed as a profiled press or cast body.
  • the support body may have a bedding for receiving a temperature sensor or regulator.
  • GB 2 103 910 A discloses a glass ceramic hotplate in which at least one radiant heater is disposed beneath a glass ceramic cooking surface and wherein the or each radiant heater comprises a continuous base layer of electrically and thermally insulating material, a peripheral wall also of electrically and thermally insulating material, and a heating element disposed on the base layer having.
  • the radiant heater also includes means, for example a backing, on the base layer for insulating a region in the peripheral wall from the heat emitted by the heating element and a temperature sensor such as a thermocouple or a platinum resistor within the isolated region to substantially only in operation the temperature of a cooking vessel, which is heated by the heater, to react sensitively.
  • the temperature sensor is effective because a cold area is created on the glass ceramic plate, by which the temperature of the cooking vessel can be determined.
  • FR 2 283 618 A1 discloses a heater having a low temperature gradient, the device having an electrical resistance protected by an electrically insulating material, the heating resistor having a thin heating conductor sandwiched between two sheets of electrically insulating material.
  • a heating device for a domestic appliance comprising a substrate to be heated with a use side and a rear side facing away from the use side, at least one surface heating, which is arranged on the back of the substrate, and at least one temperature sensor, wherein the at least one temperature sensor an associated recess in the surface heating is performed and fixed to the substrate.
  • the use side may in particular represent that side or surface of the substrate which is intended to be exposed to a medium to be treated (feed, liquor, process air, etc.).
  • the rear side can be shielded in particular by the substrate against the medium to be treated.
  • This heating device has the advantage that a direct influencing of the temperature sensed by the at least one temperature sensor is reduced on account of the surface heating, that is to say a temperature measurement which is relatively independent of the temperature of the heating is made possible. Rather, the temperature at its side of use more accurate and reliable reproducing substrate is sensed. Also, the at least one temperature sensor can now respond more quickly to temperature changes on the use side of the substrate, allowing for improved temperature control.
  • the at least one temperature sensor since the substrate is not broken through the recess, the at least one temperature sensor remains protected from the medium to be treated, which allows a further long service life. Also, the at least one temperature sensor remains hidden when looking at the use side, and the use side is easier to clean.
  • the recessed construction also allows a flatter construction.
  • the long service life is further extended by the fact that a temperature at the substrate due to a heat spread and due to a smoothing of temperature fluctuations of the heater (which may occur, for example, in a pulse-like operation of the heater) lower maximum values and temperature fluctuations than in a direct on the heater attached temperature sensor.
  • the substrate may comprise, for example, metal, including enameled metal, glass or glass-ceramic.
  • the at least one temperature sensor is mounted in a rear recess or depression of the substrate. This further reduces an influence of the heating on a temperature measurement. Also, the at least one temperature sensor is brought even closer to the use side, which further improves, for example, a measurement accuracy and a response time with respect to a temperature change on the use side.
  • the substrate has a plurality of layers or layers and the rear depression is formed by at least one recess in at least one of the layers.
  • the rear depression is formed by at least one recess in at least one of the layers.
  • at least in that layer which forms the use side of the substrate "uppermost layer"
  • no such recess is provided in order to avoid a breakthrough.
  • all layers except for the uppermost layer have a recess for generating the respective depression in order to bring the at least one temperature sensor as close as possible to the use side.
  • the layers may in particular be metal layers, wherein at least one of the layers may in particular comprise stainless steel or aluminum.
  • an uppermost layer forming the use side of the substrate may be made of durable stainless steel while an underlying layer forming the backside of the substrate is made of highly thermally conductive aluminum.
  • the heater is then attached to the aluminum layer.
  • the recess may be e.g. be formed by a recess in the aluminum layer.
  • the at least one temperature sensor can then be attached to a rear side of the stainless steel layer.
  • the layers preferably have at least one independently producible and / or freestanding layer or layer.
  • the recesses in the layers may be introduced after applying or joining the layers, e.g. by etching, lasing, etc. Alternatively, the recesses may be introduced into the respective layers prior to joining the layers and the layers then joined together.
  • the assembly may be used in independently producible layers e.g. done by soldering and / or whipping.
  • the substrate is a homogeneous material and the rear recess is formed by a material removal of the substrate, for example by milling, etching, drilling or lasing.
  • the depression is preferably brought as close as possible to the use side.
  • the recess on an area of max. about 400 mm 2 , in particular to a diameter of about 20 mm, is limited, so that the good heat distribution in the heating is not interrupted.
  • the recess is not limited in shape and may be, for example, angular, round, elliptical or equipped with a freeform contour, etc., with a circular or cylindrical recess is preferred.
  • Attachment of a temperature sensor may be accomplished in any suitable manner, e.g. by means of soldering, welding, clamping, press-fitting, gluing etc.
  • the heater may in particular be a thin-film heater or a thick-film heater.
  • the heater may comprise an electrically conductive heating conductor layer.
  • the heating conductor layer may be applied directly to a substrate to be heated, in particular if the substrate is an electrically non-conductive substrate, e.g. made of glass, glass ceramic or plastic.
  • the heating conductor layer may alternatively be applied indirectly over an electrically insulating insulating layer on a substrate to be heated, in particular if the substrate is an electrically conductive substrate, e.g. made of metal.
  • the heat conductor layer may in particular consist of CrNi.
  • a thickness of the heating conductor layer between one and 300 micrometers, in particular between 25 and 50 micrometers, is preferred.
  • the insulating layer preferably comprises a dielectric material, preferably aluminum oxide.
  • a thickness of the insulating layer between 150 and 500 micrometers, in particular between 250 and 300 micrometers, is preferred.
  • top coat may have been applied to the heater, which may for example prevent moisture from penetrating into the hygroscopic insulating layer.
  • the at least one heating track has been applied by means of a plasma process.
  • a use of a thermal plasma spraying is advantageous.
  • the heating conductor layer and optionally the insulating layer can be applied to the substrate.
  • a plasma torch can be used for plasma spraying.
  • the plasma spraying has the advantage that it is easy to carry out and allows a high accuracy of the produced layers.
  • many materials can be plasma sprayed.
  • the substrate hardly heats up during the coating (up to a maximum of 200 ° C.), which is likewise advantageous.
  • the object is also achieved by a household appliance with at least one heating device as described above.
  • the household appliance may in particular be a cooking appliance. It is an embodiment that the household appliance is a cooking appliance in the form of a Garraumeinschubs.
  • the cooking compartment insert can in particular be a food support, e.g. an actively heated baking sheet, food tray or cooking space divider.
  • the use side is typically also serving as a food storage top, his ceiling or top is directly heated by means of the rear mounted heater.
  • the temperature measurement can be so accurate that a temperature at an underside of a resting food can also be determined. Even later additions of cold foods, liquids, etc. (for example, fish sticks or infusions) may then be detected by the at least one temperature sensor.
  • a temperature control can be used advantageously to prevent burning and burning (empty cooking protection).
  • the household appliance may also be another cooking appliance, e.g. an oven (oven, microwave oven etc.) or a hob.
  • the substrate of the hob can e.g. be a glass ceramic plate.
  • the medium to be heated can then be in particular a cookware (pot, pan, etc.).
  • the household appliance may also include, for example, a washing machine (e.g., with the heating device for heating liquor), a tumble dryer (e.g., with the heating device for heating process air), or a dishwasher (e.g., with the heating device for heating rinse water).
  • a washing machine e.g., with the heating device for heating liquor
  • a tumble dryer e.g., with the heating device for heating process air
  • a dishwasher e.g., with the heating device for heating rinse water.
  • the figure shows a heating device 1 for a domestic appliance H, e.g. a heated food support.
  • the heating device 1 has a substrate 2 to be heated with a use side 3 and a rear side 4 facing away from the use side 3.
  • a surface heating 5 is mounted flat.
  • the heating device 1 further has two temperature sensors 6, which are performed by a respectively associated recess 7 in the surface heating 5 and fixed to the substrate 2.
  • the substrate 2 comprises a plurality of sheets or layers 2a, 2b, of which a first or uppermost substrate layer 2a of stainless steel defines the use side 3.
  • a second substrate layer 2 b consists of highly conductive aluminum and supports the surface heating 5.
  • the surface heating 5 has an electrically insulating insulating layer 5a made of aluminum oxide lying flat on the second substrate layer 2b, on which facing away from the second substrate layer 2b, a heat conductor layer 5b is applied flat.
  • the Schuleiter Anlagen 5b can be energized to generate heat.
  • the recess 7 is achieved by corresponding congruent recesses in the insulating layer 5a and the heating conductor layer 5b.
  • the substrate 2 has two rear recesses 8.
  • the recesses 8 are formed by a respective recess in the second substrate layer 2b, so that the temperature sensors 6 are inserted into a respective recess 7 and congruent recess 8 and fixed to the back of the uppermost substrate layer 2a.
  • the temperature sensors 6 may be attached to the uppermost substrate layer 2a directly or via a thermal interface material (TIM), such as a thermal interface material.
  • TIM thermal interface material
  • the recess 7 and the recess 8 are each configured in a circular plan view with a diameter of not more than about 20 mm.
  • the temperature sensors 6 are connected via corresponding electrical lines 9 to an evaluation unit, in particular a control unit.
  • the control unit may, in the case of a food support as the household appliance H, for. be a control unit of the Gargut lacking receiving cooking appliance.

Claims (8)

  1. Dispositif de chauffage (1) pour un appareil électroménager (H), comportant
    - un substrat (2) à chauffer, présentant une face d'utilisation (3) et une face arrière (4) opposée à la face d'utilisation (3),
    - au moins un chauffage de surface (5) monté sur la face arrière (4) du substrat (2), et
    - au moins un capteur de température (6),
    caractérisé en ce que ledit au moins un capteur de température (6) passe à travers un évidement (7) correspondant ménagé dans le chauffage de surface (5) et est fixé dans un creux arrière (8) du substrat (2).
  2. Dispositif de chauffage (1) selon la revendication 1, caractérisé en ce que le substrat (2) comporte plusieurs couches (2a ; 2b) et le creux arrière (8) est formé par un évidement (7) ménagé dans au moins une des couches (2b), au moins la couche (2a) formant la face d'utilisation (3) du substrat (2) étant exempte d'un tel évidement (7).
  3. Dispositif de chauffage selon la revendication 2, caractérisé en ce que la couche (2a) formant la face d'utilisation (3) du substrat (2) est en acier inoxydable et une couche sous-jacente (2b) formant la face arrière (4) du substrat (2) est en aluminium.
  4. Dispositif de chauffage selon la revendication 2, caractérisé en ce que le substrat est une matière homogène et le creux arrière est formé par un enlèvement de matière du substrat.
  5. Dispositif de chauffage (1) selon l'une des revendications précédentes, caractérisé en ce que l'évidement (7) est limité à une surface d'environ 400 mm2, en particulier à un diamètre d'environ 20 mm.
  6. Appareil électroménager (H) équipé d'au moins un dispositif de chauffage (1), caractérisé en ce que le dispositif de chauffage (1) est un dispositif de chauffage (1) selon l'une des revendications précédentes.
  7. Appareil électroménager (H) selon la revendication 6, caractérisé en ce que l'appareil électroménager (H) est un appareil de cuisson.
  8. Appareil électroménager (H) selon la revendication 6, caractérisé en ce que l'appareil électroménager (H) est un insert d'enceinte de cuisson.
EP11791274.1A 2010-12-07 2011-12-01 Dispositif de chauffage pour un appareil électroménager et appareil électroménager équipé de ce dispositif de chauffage Active EP2649860B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11791274T PL2649860T3 (pl) 2010-12-07 2011-12-01 Urządzenie grzewcze do urządzenia gospodarstwa domowego i urządzenie gospodarstwa domowego z takim urządzeniem grzewczym

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010062507A DE102010062507A1 (de) 2010-12-07 2010-12-07 Heizvorrichtung für ein Haushaltsgerät und Haushaltsgerät mit einer solchen Heizvorrichtung
PCT/EP2011/071486 WO2012076392A1 (fr) 2010-12-07 2011-12-01 Dispositif de chauffage pour un appareil électroménager et appareil électroménager équipé de ce dispositif de chauffage

Publications (2)

Publication Number Publication Date
EP2649860A1 EP2649860A1 (fr) 2013-10-16
EP2649860B1 true EP2649860B1 (fr) 2017-08-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11791274.1A Active EP2649860B1 (fr) 2010-12-07 2011-12-01 Dispositif de chauffage pour un appareil électroménager et appareil électroménager équipé de ce dispositif de chauffage

Country Status (5)

Country Link
EP (1) EP2649860B1 (fr)
DE (1) DE102010062507A1 (fr)
ES (1) ES2645369T3 (fr)
PL (1) PL2649860T3 (fr)
WO (1) WO2012076392A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2015229071A1 (en) 2014-03-14 2016-10-27 Spectrum Brands, Inc. Wirelessly operable cooking appliance

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2032151A1 (de) * 1970-06-30 1972-01-05 Siemens Elektrogeraete Gmbh Elektrische Heizeinrichtung mit einem flächigen Tragkörper aus anorganischem Werkstoff
FR2283618A1 (fr) * 1974-09-02 1976-03-26 Jamet Michel Dispositif a faible gradient et grande sensibilite permettant d'asservir ou de reguler la temperature d'un corps
GB2103910B (en) * 1981-08-08 1985-08-21 Micropore International Ltd Improvements in electric cookers incorporating radiant heaters

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
ES2645369T3 (es) 2017-12-05
PL2649860T3 (pl) 2017-12-29
DE102010062507A1 (de) 2012-06-14
WO2012076392A1 (fr) 2012-06-14
EP2649860A1 (fr) 2013-10-16

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