EP1260120B1 - Cooking surface comprising a temperature sensor - Google Patents
Cooking surface comprising a temperature sensor Download PDFInfo
- Publication number
- EP1260120B1 EP1260120B1 EP01921276A EP01921276A EP1260120B1 EP 1260120 B1 EP1260120 B1 EP 1260120B1 EP 01921276 A EP01921276 A EP 01921276A EP 01921276 A EP01921276 A EP 01921276A EP 1260120 B1 EP1260120 B1 EP 1260120B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature sensor
- cooker hob
- heating
- underside
- plate
- 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.)
- Expired - Lifetime
Links
- 238000010411 cooking Methods 0.000 title claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 59
- 239000000463 material Substances 0.000 claims description 8
- 230000005855 radiation Effects 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000006112 glass ceramic composition Substances 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 2
- 239000002241 glass-ceramic Substances 0.000 abstract description 21
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 description 14
- 238000012546 transfer Methods 0.000 description 10
- 239000002184 metal Substances 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 229910052736 halogen Inorganic materials 0.000 description 3
- 150000002367 halogens Chemical class 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Images
Classifications
-
- 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
- H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
- H05B3/746—Protection, e.g. overheat cutoff, hot plate indicator
-
- 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 present invention relates to a hob according to the preamble of claim 1, and a corresponding heating element and a suitable element.
- Such a hob is known from the document DE 37 03 768 C2 in which a device for detecting the temperature of a heated by means of heating coils or halogen lamps glass-ceramic plate is disclosed with a temperature sensor. This emits a signal corresponding to the temperature of the glass ceramic for a control circuit.
- the heating coils or the halogen lamps are arranged in the interior of a pot-like insulating support and heat the glass ceramic plate via direct radiation. The edge of the insulating support abuts against the underside of the glass-ceramic plate under spring tension, and the temperature sensor is outside the interior of the insulating support; however, within the heating element.
- the temperature sensor is further in thermally conductive connection with the underside of the glass ceramic plate, wherein the temperature sensor is arranged in a receptacle in the edge of the insulating support.
- the receptacle is arranged at a distance x to the inside of the edge of the insulating support, the minimum value of which is selected so that the short-term temperature changes occurring when the heating coils or the halogen lamps are switched on and off have only a negligible influence on the temperature sensor.
- the maximum value of the distance x is chosen such that the delay in the control characteristic caused by the thermal conductivity of the glass ceramic plate results in a small hysteresis. As a distance x widths of 3 mm to 6 mm have proven to be advantageous.
- the temperature sensor is introduced into the introduced or indented receptacle on the upper side of the projection, which protrudes into the interior of the insulating support, and is in heat-conducting connection with the underside of the glass ceramic plate.
- the temperature sensor is indirectly held under spring tension on the underside of the glass ceramic plate in order to keep the heat transfer resistance between the glass ceramic plate and the temperature sensor small.
- a heating element for a cooking unit with a temperature sensor known.
- a heat transfer element in the form of a sheet is used, which is arranged partially overlapping the heated area between the radiators and the glass ceramic plate, but from the Heating element protrudes and there is in communication with the temperature sensor of the controller.
- the heat transfer element is fixed on the edge of the heating shell bearing by clamping and is usually on the underside of the glass ceramic plate. From the heat-sensing region of the heat transfer element, an outer section protrudes outwards beyond the edge of the heating element.
- the sensor socket of the temperature sensor is pressed by a compression spring to the underside of the heat transfer surface of the heat transfer element, which is supported on a leading the sensor socket, mounted on the outer portion of the heat transfer element holding mechanism.
- a compression spring to the underside of the heat transfer surface of the heat transfer element, which is supported on a leading the sensor socket, mounted on the outer portion of the heat transfer element holding mechanism.
- an electrical NTC or PTC sensor can be used, which is pressed resiliently or is fixedly attached to the outer portion of the heat transfer element.
- the heat transfer element can be grounded, providing contact protection.
- thermocouple is held in good thermal contact with the underside of the glass ceramic plate by means of the insulation block.
- Object of the present invention is to provide a generic hob and a corresponding heating element, which at the same time have a high safety standard and a good measurement accuracy.
- a permanent stable positioning of a thermally conductive element with a temperature sensor of the hob and easy accessibility of connections are ensured.
- the temperature sensor is connected to a thermally conductive element which is thermally conductive with the underside of the hob plate in conjunction, and that the element completely covers the temperature sensor up to the hob plate.
- the temperature sensor is on the one hand thermally coupled well to the underside of the hob plate and on the other hand, the safety regulations are respect.
- the 4 resp. 8 mm air and creepage distance between live parts and the glass ceramic hotplate complied with.
- a complex realization of the temperature measuring arrangement for example, in safety extra-low voltage technology is not required.
- the element also covers the electrical leads of the temperature sensor up to the hob plate out.
- the element is approximately hood-shaped at least in the region of the temperature sensor and has an upper and apron-like lateral walls.
- the 8 mm air and creepage distance can be maintained without having to choose the base area of the hood too large. This is particularly important because the hood together with the temperature sensor is preferably shielded from the heat radiation of the heating means of the heating element, the shielding area may not be chosen too large.
- the hood is at least partially closed on the bottom side.
- the heat-conducting element in the region of the outer peripheral wall of the heating element or the insulating support fixed directly or with the aid of an intermediate mounting part, in particular screwed.
- the intermediate mounting part is fixed in the bottom region of the heating element and extends in the region of the outer peripheral wall of the heating element, in which the element in turn screwed to the intermediate mounting part.
- the element can be screwed to the outer peripheral wall of the heating element at different heights.
- the temperature sensor is attached to the underside of the element.
- a large plane contact surface for improving the heat conduction from the underside of the glass ceramic plate to the temperature sensor can be realized.
- the temperature sensor is characterized by the larger area element in the assembly process, e.g. when falling the unit element / temperature sensor, better mechanically protected.
- the element may have a receiving portion for the temperature sensor and a mounting portion for the attachment of the element, in particular in the heating element, wherein the receiving portion is radially laterally offset from the mounting portion.
- the temperature sensor is to be mounted in the immediate vicinity of a temperature limiter present in the heating element.
- the temperature limiter namely the mounting space in the region of the outer peripheral wall of the heating element is limited, on the other hand, it is favorable if the various electrical connections of the temperature limiter and the temperature sensor are as close as safety-friendly together.
- the element is formed at least in two parts.
- a receiving part for the temperature sensor consists of a softer material in order to be able to geometrically reshape the receiving part in an application-specific and safety-related manner.
- the remainder of the element may consist of a different material, wherein in particular a spring material is suitable for being able to press the element in a defined manner against the underside of the glass-ceramic plate.
- Manufacturing and assembly technology is particularly advantageous when the element is designed as a torsion spring, wherein the torsion region of the spring element is provided substantially outside of the heating element and thus in a cooler area.
- the element is designed to be electrically conductive and grounded in order to optimally meet the safety regulations with a simple structure.
- both the temperature sensor and the element by means of an insulating body is sufficiently shielded against emanating from a heating means of the heating element heat radiation.
- the electrical leads of the temperature sensor are connected to a first connection portion of the element or a fitting mounted there.
- the element can also have a second connection section, to which a grounding line of the element is connected.
- a hob 1 has a hob plate 3, in particular of glass ceramic, on ( Fig. 1 ).
- different heating elements 5 of the hob are provided in a conventional manner, which are pressed in a known manner to the underside of the hob plate 3 (not shown).
- the hob plate 3 is usually decorated accordingly on its upper side.
- a cooking vessel 6 is shut off.
- the bottom of the cooking vessel 6 is in the cold state often only in the edge region of the heating element 5 in an annular surface on the hob plate 3, while in the central residual region of the pot bottom is spaced by an air gap of the plate ( Fig. 1 ).
- the heating element 5 has a cup-shaped sheet metal pot 7, in which a circular disk-shaped insulation plate 9 is located. Furthermore, an inner insulation ring 11 and an outer insulation ring 13 corresponding to a two-circuit heating arrangement are provided within the sheet metal pot 7 on the insulation plate 9. As a result, the interior of the heating element 5 is separated into an inner and an outer heating region, in each of which a Bandterrorism 15 extends ( Fig. 1 . Fig. 2 ).
- a Schuleiteran gleichteil 17 is fixed in the region of the outer peripheral wall of the sheet metal pot 7, which is on the one hand conductively connected to the BandChleitern 15 and on the other hand to not shown electrical supply lines of the hob 1 can be connected ( Fig. 2 ).
- the heating element 5 also has a known temperature limiter 19, whose rod extends transversely across the heated region of the heating element.
- the terminal block of the temperature limiter 19 has the known and usual, laterally issued Kunststoffflachsteckite for connection to the power supply line or to the Schuleiteranschlußteil 17 of the heating element 5.
- an insulation block 21 is disposed in the region of the temperature limiter 19.
- a receiving recess 23 is milled in the top thereof.
- a heat-conducting element 25 is arranged with its element hood 27 ( Fig. 1 . 2, 3 ). It is too Note that the hood 27 is not seated directly on the bottom of the recess 23 so that the hood 27 can yield slightly to a blow on the hob plate 3. As a result, damage or breakage of the plate 3 can be avoided, especially if it is made of glass or glass ceramic material.
- the element hood 27 In the receiving space formed by the element hood 27 is by means of a temperature-resistant and thermally conductive ceramic adhesive 28 as a temperature sensor 29, a PT-500 probe embedded with its sensor leads 30 and thereby secured and guided.
- the material of the element cover 27 is X7 steel and the hood 27 is designed as a bent part.
- the hood material must have sufficiently good heat conduction properties, must be well deformable, as explained below, but sufficiently mechanically stable over the entire temperature range of up to 350 - 400 ° C, and retain its properties even at these temperatures.
- two side walls 31 are bent substantially at right angles down ( Fig. 3 ). Also bent at right angles to the side walls 31 define bottom walls 33 a slot-shaped open bottom of the element cover 27.
- the front side of the receiving space of the hood is closed by a right angle bent from the top wall end wall 35. Due to the dome-shaped design of the element 25 ensures that the safety-specified air and creepage distance to the live temperature sensor 29 is maintained in case of breakage of the hob plate 3, without the base of the element 25 and the hood 27 and thus of the insulation block 21 too large to have to shape. More detailed explanations on the geometric design and arrangement of the temperature sensor 29, the element 25 and the insulation block 21 will be described in connection with the description of in Fig. 5 sketched third embodiment.
- the hood 27 is fixedly connected to a substantially L-shaped hood carrier 37 made of steel, preferably welded.
- the element hood 27 is seated on a connecting section 39 of the hood carrier 37 (FIG. Fig. 3 ).
- the top wall of the element hood 27 is arranged slightly elevated relative to the top side of the hood carrier 37 and defines and delimits a surface area A, in which the element 25 rests on the underside of the hob plate 3 in a heat-conducting manner ( Fig. 1 . 2 . 5 ).
- Due to the overlapping connection of hood 27 and hood carrier 37 is also the stability of Connection increased.
- the cage carrier 37 is made of 0.8 mm thick material in order to be suitable for the earthing plug-in connections described below, the element cover 27 is made of thinner material, which additionally simplifies their forming.
- the hood carrier 37 is in a spring portion 41 in a mounting portion 43 via ( Fig. 2, 3rd ).
- the spring portion 41 is arranged substantially outside the heated region of the heating element 5 and the outer insulating ring 13.
- the mounting portion 43 of the hood support 37 has a right angle bent down mounting plate 45 with mounting holes 47.
- the heat-conducting element 25 height adjustable via an intermediate mounting member 48 on the outer peripheral wall of the sheet metal pot 7 are attached Fig. 2 ).
- the intermediate mounting part 48 is bolted on the one hand to the underside of the sheet metal pot 7 in the bottom thereof (not shown). This part 48 extends approximately L-shaped from the bottom of the heating element to its side wall 7.
- the heat-conducting element 25 is then screwed to the intermediate mounting part 48 and thus defined in terms of height the position of the heat-conducting element 25 defined.
- the heat-conducting element 25 can also be screwed to the outer wall of the sheet pot 7 in the area of the mounting openings 47.
- a connection part can be fastened in the mounting openings 47 (not shown), to which the electrical sensor leads 30 of the temperature sensor 29 can be connected, eg, plugged, and on the other hand electrical connection lines of a control unit 101 (FIG.
- connection part is further to ensure that the electrical connections of the PT temperature sensor 29 to ground or the grounded hood carrier 37 are isolated.
- the temperature sensor and the sensor lines 30 are covered over the entire length of the heat-conducting element 25 deck.
- the mounting plate 45 has a flat pin 49 on which a grounding line 51 and their standard AMP plug of the hob is directly pluggable. As a result, the heat-conducting element 25 is set to ground potential.
- the ohmic resistance of the element 25 is at a value of 0.1 ohms or less in order to withstand a continuous current load of at least 25 amperes. Furthermore, the heat-conducting element 25 must not be made too stiff in order to be able to give in properly under mechanical loading or movement of the hob plate 3. Otherwise would be feared by a too stiff concern of the element 25 and the element cover 27 on the hob plate 3 hotplate chipping on the underside of the plate 3 or possibly also their breakage.
- the hood-shaped heat conducting element 85 has an element hood 87, which corresponds to that of the first exemplary embodiment.
- a mounting portion 89 of the hood carrier 37 is not arranged laterally offset radially to the receiving portion of the element hood 87. Rather, the mounting portion 89 extends in extension of the element cover 87 radially unopposed along the outer wall of the sheet metal pot 7 vertically downwards.
- Fig. 4 is shown schematically in which area A, the heat-conducting element 85 is thermally in contact with the underside of the hob plate 3. The size of the area is about 50 to 100 mm 2 .
- the contact surface A is about 10 times larger than a base B of the temperature sensor 29. This ensures, inter alia, that the temperature at the bottom of the cooktop panel by the temperature sensor not quasi point-like, but determined integrating over a larger area becomes. This is particularly important because the respective pan diameter and its soil properties are not known exactly and can also vary from pan to pan type.
- a lateral minimum distance a of the element 85 to the edge region of the insulating material 21 is about 8 mm. This provides an optimal geometry that has the following advantages for the has precise control of the heating power or the temperature, in particular in frying operations in pans 6 parked on the hob plate 3.
- the temperature sensor 29 and the element hood 27 are shielded by the insulation block 21 on the one hand sufficiently against the emanating from the Bandbyleiter 15 thermal radiation.
- the insulation block is still small enough to avoid an adverse shading of the cooking vessel bottom 6 and thereby caused undesirable uneven heat distribution in the pan bottom when heating or frying.
- the heat-conducting element 25 is still sufficiently thermally coupled to the region of the hob plate, which is heated directly by the heat radiation of the heating means 15. This is also achieved in the first and in the second embodiment wherein at the same time the temperature sensor 29 relative to the hob plate 3 is covered by a grounded protective element 27 in compliance with the required according to 4 or 8 mm creepage distance and air gap.
- the measuring surface A is coupled by a high-temperature lubricant to the cooktop plate underside, which consists in particular of glass ceramic material, in order to achieve improved heat transfer and impact resistance improved damping.
- Fig. 5 schematically a block diagram is shown, showing the main components of the hob.
- the control unit 101 regulates the heating power of the BandMapleiters 15 according to the measured values of the temperature sensor 29 to the predetermined by an input unit 103 target value.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Electric Stoves And Ranges (AREA)
- Control Of Resistance Heating (AREA)
- Cookers (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft ein Kochfeld nach dem Oberbegriff des Patentanspruches 1, sowie ein entsprechendes Heizelement und ein geeignetes Element.The present invention relates to a hob according to the preamble of claim 1, and a corresponding heating element and a suitable element.
Ein derartiges Kochfeld ist bekannt aus der Druckschrift
Weiterhin ist aus der Druckschrift
Weiterhin ist aus der Druckschrift
Aus der
Aufgabe der vorliegenden Erfindung ist es, ein gattungsgemäßes Kochfeld und ein entsprechendes Heizelement bereitzustellen, die gleichzeitig einen hohen Sicherheitsstandard und eine gute Meßgenauigkeit aufweisen. Insbesondere soll eine dauerhafte stabile Positionierung eines wärmeleitenden Elements mit einem Temperaturfühler des Kochfeldes sowie eine einfache Zugänglichkeit von Anschlüssen gewährleistet werden.Object of the present invention is to provide a generic hob and a corresponding heating element, which at the same time have a high safety standard and a good measurement accuracy. In particular, should a permanent stable positioning of a thermally conductive element with a temperature sensor of the hob and easy accessibility of connections are ensured.
Erfindungsgemäß ist dies dadurch erreicht, dass bei einem Kochfeld nach dem Oberbegriff des Patentanspruches 1 der Temperaturfühler mit einem wärmeleitenden Element verbunden ist, das wärmeleitend mit der Unterseite der Kochfeldplatte in Verbindung steht, und daß das Element den Temperaturfühler nach oben zur Kochfeldplatte hin vollständig abdeckt. Durch das Wärmeleitelement ist der Temperaturfühler einerseits thermisch gut an die Unterseite der Kochfeldplatte angekoppelt und andererseits sind die Sicherheits-Vorschriften bzgl. der 4 bzw. 8 mm- Luft- und Kriechstrecke zwischen spannungsführenden Teilen und der Glaskeramik-Kochplatte eingehalten. Eine aufwendige Realisierung der Temperaturmessanordnung beispielsweise in Schutzkleinspannungstechnik ist nicht erforderlich.According to the invention this is achieved in that in a hob according to the preamble of claim 1, the temperature sensor is connected to a thermally conductive element which is thermally conductive with the underside of the hob plate in conjunction, and that the element completely covers the temperature sensor up to the hob plate. By the heat-conducting element, the temperature sensor is on the one hand thermally coupled well to the underside of the hob plate and on the other hand, the safety regulations are respect. The 4 resp. 8 mm air and creepage distance between live parts and the glass ceramic hotplate complied with. A complex realization of the temperature measuring arrangement, for example, in safety extra-low voltage technology is not required.
Zur Verbesserung der Sicherheit der Anordnung ist vorgesehen, dass das Element auch die elektrischen Zuleitungen des Temperaturfühlers nach oben zur Kochfeldplatte hin abdeckt.To improve the safety of the arrangement is provided that the element also covers the electrical leads of the temperature sensor up to the hob plate out.
Gemäß einer bevorzugten Aufführungsform ist das Element zumindest im Bereich des Temperaturfühlers etwa haubenförmig ausgebildet und weist dabei eine obere und schürzenähnliche seitliche Wände auf. Dabei kann die 8 mm- Luft- und Kriechstrecke eingehalten werden, ohne die Grundfläche der Haube zu groß wählen zu müssen. Dies ist insbesondere deshalb wichtig, weil die Haube zusammen mit dem Temperaturfühler bevorzugterweise von der Wärmestrahlung des Heizmittels des Heizelementes abzuschirmen ist, der Abschirmungsbereich jedoch nicht zu groß gewählt werden darf.According to a preferred embodiment, the element is approximately hood-shaped at least in the region of the temperature sensor and has an upper and apron-like lateral walls. The 8 mm air and creepage distance can be maintained without having to choose the base area of the hood too large. This is particularly important because the hood together with the temperature sensor is preferably shielded from the heat radiation of the heating means of the heating element, the shielding area may not be chosen too large.
Um den Temperaturfühler in die Haube einfach beispielsweise mit einem hochtemperaturbeständigen, wärmeleitenden Keramikkleber eingießen zu können, ist die Haube bodenseitig zumindest zum Teil geschlossen ausgebildet.To be able to easily pour the temperature sensor into the hood, for example, with a high-temperature-resistant, thermally conductive ceramic adhesive, the hood is at least partially closed on the bottom side.
Um das Element schnell und fehlerfrei montieren zu können, ist vorgesehen, dass das Wärmeleitelement im Bereich der Außenumfangswand des Heizelementes bzw. des Isolierträgers direkt oder unter Zuhilfenahme eines Zwischenmontageteiles befestigt, insbesondere verschraubt ist. Dabei kann insbesondere vorgesehen sein, dass das Zwischenmontageteil im Bodenbereich des Heizelementes befestigt ist und sich in den Bereich der Außenumfangswand des Heizelementes erstreckt, in dem das Element wiederum mit dem Zwischenmontageteil verschraubt ist. Um den Anpressdruck bzw. die Anpressfläche des Elementes und damit unter anderem die thermische Ankopplung des Elementes an die Unterseite der Kochfeldplatte gut einstellen zu können, kann das Element an der Außenumfangswand des Heizelementes in verschiedenen Höhen anschraubbar sein.In order to mount the element quickly and accurately, it is provided that the heat-conducting element in the region of the outer peripheral wall of the heating element or the insulating support fixed directly or with the aid of an intermediate mounting part, in particular screwed. It can be provided in particular that the intermediate mounting part is fixed in the bottom region of the heating element and extends in the region of the outer peripheral wall of the heating element, in which the element in turn screwed to the intermediate mounting part. In order to adjust the contact pressure or the contact surface of the element and thus, inter alia, the thermal coupling of the element to the underside of the hob plate, the element can be screwed to the outer peripheral wall of the heating element at different heights.
Gemäß einer bevorzugten Ausführungsform ist der Temperaturfühler an der Unterseite des Elementes befestigt. Dadurch kann zum einen eine große plane Auflagefläche zur Verbesserung der Wärmeleitung von der Unterseite der Glaskeramikplatte zum Temperaturfühler realisiert werden. Zum anderen ist der Temperaturfühler durch das flächenmäßig größere Element im Montageprozeß, z.B. beim Herunterfallen der Einheit Element/ Temperaturfühler, besser mechanisch geschützt.According to a preferred embodiment, the temperature sensor is attached to the underside of the element. As a result, on the one hand, a large plane contact surface for improving the heat conduction from the underside of the glass ceramic plate to the temperature sensor can be realized. On the other hand, the temperature sensor is characterized by the larger area element in the assembly process, e.g. when falling the unit element / temperature sensor, better mechanically protected.
Zur Vereinfachung der Montage kann das Element einen Aufnahmeabschnitt für den Temperaturfühler und einen Montageabschnitt für die Befestigung des Elementes, insbesondere im Heizelement, aufweisen, wobei der Aufnahmeabschnitt radial seitlich versetzt zum Montageabschnitt liegt. Dies ist insbesondere dann wichtig, wenn der Temperaturfühler in unmittelbarer Nähe eines bei dem Heizelement vorhandenen Temperaturbegrenzers montiert werden soll. Durch den Temperaturbegrenzer ist nämlich der Montageplatz im Bereich der Außenumfangswand des Heizelementes beschränkt, andererseits ist es jedoch günstig, wenn die verschiedenen elektrischen Anschlüsse des Temperaturbegrenzers und des Temperaturfühlers so nahe wie sicherheitstechnisch erlaubt beieinander liegen.To simplify the assembly, the element may have a receiving portion for the temperature sensor and a mounting portion for the attachment of the element, in particular in the heating element, wherein the receiving portion is radially laterally offset from the mounting portion. This is particularly important if the temperature sensor is to be mounted in the immediate vicinity of a temperature limiter present in the heating element. By the temperature limiter namely the mounting space in the region of the outer peripheral wall of the heating element is limited, on the other hand, it is favorable if the various electrical connections of the temperature limiter and the temperature sensor are as close as safety-friendly together.
Vorteilhafterweise ist das Element zumindest zweiteilig ausgebildet. Ein Aufnahmeteil für den Temperaturfühler besteht dabei aus einen weicheren Material, um den Aufnahmeteil anwendungs- und sicherheitstechnisch spezifisch optimal geometrisch umformen zu können. Der Rest des Elementes kann aus einem anderen Material bestehen, wobei insbesondere ein Federmaterial geeignet ist, um das Element definiert an die Unterseite der Glaskeramikplatte andrücken zu können.Advantageously, the element is formed at least in two parts. A receiving part for the temperature sensor consists of a softer material in order to be able to geometrically reshape the receiving part in an application-specific and safety-related manner. The remainder of the element may consist of a different material, wherein in particular a spring material is suitable for being able to press the element in a defined manner against the underside of the glass-ceramic plate.
Fertigungs- und montagetechnisch besonders günstig ist es, wenn das Element als Torsionsfeder ausgebildet ist, wobei der Torsionsbereich des Federelementes im wesentlichen außerhalb des Heizelementes und damit in einem kühleren Bereich vorgesehen ist.Manufacturing and assembly technology is particularly advantageous when the element is designed as a torsion spring, wherein the torsion region of the spring element is provided substantially outside of the heating element and thus in a cooler area.
Gemäß einer bevorzugten Ausführungsform ist das Element elektrisch leitfähig ausgebildet sowie geerdet, um um bei einfachem Aufbau den Sicherheitsvorschriften optimal zu genügen.According to a preferred embodiment, the element is designed to be electrically conductive and grounded in order to optimally meet the safety regulations with a simple structure.
Um eine ausreichende Meßgenauigkeit zu erhalten, ist sowohl der Temperaturfühler als auch das Element mittels eines Isolationskörpers ausreichend gegen von einem Heizmittel des Heizelementes ausgehende Wärmestrahlung abgeschirmt.In order to obtain a sufficient measuring accuracy, both the temperature sensor and the element by means of an insulating body is sufficiently shielded against emanating from a heating means of the heating element heat radiation.
Zur Vereinfachung der Montage und insbesondere zur Zugentlastung sind die elektrischen Leitungen des Temperaturfühlers mit einem ersten Anschlussabschnitt des Elementes oder einem dort montierten Anschlussstück verbunden. Entsprechend kann auch das Element einen zweiten Anschlussabschnitt aufweisen, an dem eine Erdungsleitung des Elementes angeschlossen ist.To simplify the assembly and in particular for strain relief, the electrical leads of the temperature sensor are connected to a first connection portion of the element or a fitting mounted there. Accordingly, the element can also have a second connection section, to which a grounding line of the element is connected.
Nachfolgend sind anhand schematischer Darstellungen zwei Ausführungsbeispiele des erfindungsgemäßen Kochfeldes und Heizelementes bzw. Elementes für das Heizelement beschrieben. Es zeigen:
- Fig. 1
- in einer Schnittdarstellung im wesentlichen entlang der Linie 1-1 in
Fig. 2 das Kochfeld mit einem Heizelement gemäß dem ersten Ausführungsbeispiel, - Fig. 2
- in einer perspektivischen Ansicht von oben das Heizelement alleine gemäß dem ersten Ausführungsbeispiel,
- Fig. 3
- in vergrößertem Maßstab in einer perspektivischen Ansicht von unten das Wärmeleitelement aus
Fig. 1 undFig. 2 ohne den Temperaturfühler, - Fig. 4
- in einer Ansicht von oben abschnittsweise das Heizelement mit dem Wärmeleitelement gemäß dem zweiten Ausführungsbeispiel und
- Fig. 5
- ein Blockschaltbild des erfindungsgemäßen Kochfeldes.
- Fig. 1
- in a sectional view substantially along the line 1-1 in
Fig. 2 the hob with a heating element according to the first embodiment, - Fig. 2
- in a perspective view from above, the heating element alone according to the first embodiment,
- Fig. 3
- on an enlarged scale in a perspective view from below the heat conduction from
Fig. 1 andFig. 2 without the temperature sensor, - Fig. 4
- in a top view in sections, the heating element with the heat conducting element according to the second embodiment and
- Fig. 5
- a block diagram of the hob according to the invention.
Ein Kochfeld 1 weist eine Kochfeldplatte 3, insbesondere aus Glaskeramik, auf (
In den durch die Elementenhaube 27 gebildeten Aufnahmeraum ist mittels eines temperaturbeständigen und wärmeleitenden Keramikklebers 28 als Temperaturfühler 29 ein PT-500-Meßfühler mit seinen Fühlerleitungen 30 eingebettet und dadurch befestigt und geführt. Das Material der Elementenhaube 27 ist X7-Stahl und die Haube 27 ist dazu als Biegeteil ausgeführt. Das Haubenmaterial muss ausreichend gute Wärmeleitungseigenschaften aufweisen, muss gut verformbar sein, wie nachfolgend erläutert ist, jedoch im gesamten Temperaturbereich von bis zu 350 - 400°C ausreichend mechanisch stabil, und seine Eigenschaften auch bei diesen Temperaturen beibehalten. Von dem als Deckwand dienenden Abschnitt der Elementenhaube 27 sind zwei Seitenwände 31 im wesentlichen rechtwinklig nach unten abgebogen (
Der Haubenträger 37 geht in einem Federabschnitt 41 in einen Montageabschnitt 43 über (
Gemäß dem zweiten Ausführungsbeispiel nach
In
Claims (10)
- Cooker hob with a cooker hob plate (3), particularly of glass-ceramic material, below which at least one heating element (5) is arranged, for heating a cooking vessel which can be placed on the cooker hob plate (3), and with a temperature sensor (29) for detecting the temperature of the cooker hob plate (3), which temperature sensor (29) within the heating element (5) senses the temperature of the underside of the cooker hob plate (3) and is connected with a control unit (101) for controlling the heat output of the heating element (5), wherein the temperature sensor (29) is connected with a thermally conductive element (25; 85) which is thermally conductively connected with the underside of the cooker hob plate (3) and that the element (25; 85) completely covers the temperature sensor (29) upwardly towards the cooker hob plate (3), characterised in that the element (25; 85) is earthed outside the heating element (5) and the element (25) has a second connecting section (49) with which an earth line (51) of the element (25) is connected.
- Cooker hob according to claim 1, characterised in that the temperature sensor (29) and the element (25; 85) are screened by means of insulating material (21) from the heat radiation of the heating means (15).
- Cooker hob according to claim 1, characterised in that the element (25; 85) covers electrical feed lines (30) of the temperature sensor (29) upwardly towards the cooker hob plate (3).
- Cooker hob according to one of the preceding claims, particularly according to claim 2, characterised in that the element (25; 85) is constructed to be approximately hood-shaped at least in the region of the temperature sensor (29) and in that case has upper and skirt-like lateral walls (31; 35).
- Cooker hob according to claim 4, characterised in that the hood (27; 87) is closed at least in part at the base side.
- Cooker hob according to claim 4 or 5, characterised in that the material of the hood (27; 87) is X7 steel or X10 steel.
- Cooker hob according to claim 1, characterised in that the value of the resistive impedance of the element (25; 85) is less than approximately 0.1 Ohms.
- Cooker hob according to one of the preceding claims, characterised in that the element (25) has a first connecting section (47) which is connected with the electrical lines (30) of the temperature sensor (29).
- Cooker hob according to one of the preceding claims, characterised in that the temperature sensor (29) is cast in the element (25; 85) or fastened thereto.
- Cooker hob according to one of the preceding claims, characterised in that the element (25; 85) is constructed as a spring element and is urged in the region of the temperature sensor (29) against the underside of the cooker hob plate (3).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10006953 | 2000-02-16 | ||
DE10006953A DE10006953A1 (en) | 2000-02-16 | 2000-02-16 | Hob with temperature sensor |
PCT/EP2001/001384 WO2001062047A1 (en) | 2000-02-16 | 2001-02-08 | Cooking surface comprising a temperature sensor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1260120A1 EP1260120A1 (en) | 2002-11-27 |
EP1260120B1 true EP1260120B1 (en) | 2008-07-09 |
Family
ID=7631125
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01921276A Expired - Lifetime EP1260120B1 (en) | 2000-02-16 | 2001-02-08 | Cooking surface comprising a temperature sensor |
Country Status (5)
Country | Link |
---|---|
US (1) | US20030042246A1 (en) |
EP (1) | EP1260120B1 (en) |
AT (1) | ATE400981T1 (en) |
DE (2) | DE10006953A1 (en) |
WO (1) | WO2001062047A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2859867B1 (en) * | 2003-09-16 | 2006-04-14 | Frima Sa | HEATING ELEMENT FOR COOKING APPARATUS |
DE102004053012B4 (en) * | 2004-10-29 | 2023-01-12 | BSH Hausgeräte GmbH | Hob with a temperature sensor |
DE102005040041B3 (en) * | 2005-08-23 | 2006-10-19 | Miele & Cie. Kg | Glass ceramic cooking plate, for a cooker/hob, is within an insulation and is fitted with a lower temperature monitor to hold the radiated heat from the upper surface at a given level |
SE529587C2 (en) * | 2005-10-21 | 2007-09-25 | Hans-Goeran Aahlander | A cooking device with sensor arrangement and a cooking vessel |
US20150265089A1 (en) * | 2014-03-19 | 2015-09-24 | Zoppas Industries de Mexico SA de CV | Surface Unit for Heating |
CA2943281A1 (en) * | 2014-03-19 | 2015-09-24 | Zoppas Industries de Mexico | High performance surface unit for heating |
ES1135492Y (en) * | 2014-12-11 | 2015-04-13 | Eika S Coop | Radiant light adapted to a cooking hob |
CN107889300A (en) * | 2016-09-29 | 2018-04-06 | 浙江久康电器有限公司 | The electrical heating stove of plug-in type infrared ray electric heat stove plate and the dress electric heating furnace tray |
US10757762B2 (en) * | 2017-12-01 | 2020-08-25 | Haier Us Appliance Solutions, Inc. | Electric cooktop appliance |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3622754A (en) * | 1970-07-24 | 1971-11-23 | Gen Electric | Glass plate surface heating unit with even temperature distribution |
DE2747652C2 (en) * | 1977-10-24 | 1984-04-05 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | Electric cooker |
GB2071969B (en) * | 1980-03-05 | 1983-09-21 | Kenwood Mfg Co Ltd | Cooking apparatus |
US4447710A (en) * | 1981-08-08 | 1984-05-08 | Micropore International Limited | Electric cookers incorporating radiant heaters |
DE3703768A1 (en) * | 1987-02-07 | 1988-08-18 | Fissler Gmbh | DEVICE FOR DETECTING THE TEMPERATURE OF A GLASS CERAMIC PLATE HEATED BY HEATING WINDINGS OR HALOGEN LAMPS |
US4816647A (en) * | 1987-11-13 | 1989-03-28 | General Electric Company | Power control for appliance having a glass ceramic cooking surface |
GB2335541A (en) * | 1998-03-20 | 1999-09-22 | Ceramaspeed Ltd | Electric heater comprising a temperature sensing and limiting arrangement |
-
2000
- 2000-02-16 DE DE10006953A patent/DE10006953A1/en not_active Withdrawn
-
2001
- 2001-02-08 AT AT01921276T patent/ATE400981T1/en not_active IP Right Cessation
- 2001-02-08 EP EP01921276A patent/EP1260120B1/en not_active Expired - Lifetime
- 2001-02-08 DE DE50114094T patent/DE50114094D1/en not_active Expired - Lifetime
- 2001-02-08 WO PCT/EP2001/001384 patent/WO2001062047A1/en active IP Right Grant
-
2002
- 2002-08-16 US US10/223,029 patent/US20030042246A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
EP1260120A1 (en) | 2002-11-27 |
DE50114094D1 (en) | 2008-08-21 |
US20030042246A1 (en) | 2003-03-06 |
WO2001062047A1 (en) | 2001-08-23 |
ATE400981T1 (en) | 2008-07-15 |
DE10006953A1 (en) | 2001-08-23 |
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