EP1258172A1 - Kochfeld mit temperaturfühler - Google Patents
Kochfeld mit temperaturfühlerInfo
- Publication number
- EP1258172A1 EP1258172A1 EP01905756A EP01905756A EP1258172A1 EP 1258172 A1 EP1258172 A1 EP 1258172A1 EP 01905756 A EP01905756 A EP 01905756A EP 01905756 A EP01905756 A EP 01905756A EP 1258172 A1 EP1258172 A1 EP 1258172A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature sensor
- heating element
- hob
- heating
- heat
- 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
-
- 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 cooktop with a cooktop, below which at least one heating element is arranged for heating a cooking vessel that can be placed on the cooktop, and to a temperature sensor for detecting the temperature of the cooktop, which temperature sensor within the heating element is in heat-conducting contact with the underside of the cooktop stands and is connected to a control unit for controlling the heating line of the heating element, as well as a corresponding heating element and a suitable element
- Such a hob is known from the publication DE 37 03 768 C2, whereby a device for detecting the temperature of a glass ceramic plate heated by means of heating coils or halogen lamps with a temperature sensor is disclosed.
- This sensor 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 insulator and heat the glass ceramic plate via direct radiation.
- the edge of the insulator is spring-loaded on the underside of the glass ceramic plate, and the temperature sensor is outside the
- the temperature sensor is still in heat-conducting connection with the underside of the glass ceramic plate, the temperature sensor being arranged in a receptacle in the edge of the iso-carrier.
- the minimum value is selected so that the short-term temperature changes that occur when the heating coils or halogen lamps are switched on and off only have a negligible influence on the temperature sensor.
- the maximum value of the distance x is selected such that the control characteristic delays due to the thermal conductivity of the glass ceramic plate A small hysteresis results. A distance x of 3 mm to 6 mm has proven to be advantageous.
- the temperature sensor is inserted in the or printed receptacle on the top of the extension, which protrudes into the interior of the insulating material, is inserted and is in heat-conducting connection with the underside of the glass ceramic plate.
- the temperature sensor is held indirectly under spring tension on the underside of the glass ceramic plate to keep the heat transfer resistance between the glass ceramic plate and the temperature sensor small to keep
- a heating element for a cooking unit with a temperature sensor is known from the document EP 0 021 107 A1.
- a heat transfer element in the form of a sheet is used , which is partially overlapping the heated area between the radiators and the glass ceramic plate, but protrudes from the heating element and is there connected to the temperature sensor of the controller.
- the heat transfer element is attached to the edge of the shell supporting the heating by clamping and is normally on the Underside of the glass ceramic plate on From the area of the heat dissipating
- Heat transfer element protrudes an outer section outwards beyond the edge of the heating element.It is formed in one piece with the aforementioned area, essentially parallel to it, but offset slightly downward by a bend, so that the outer section does not abut the underside of the glass ceramic plate
- the temperature sensor is attached to the underside of the by a compression spring
- Printed heat transfer surface of the heat transfer element which is supported on a holding mechanism that guides the sensor socket and is attached to the outer section of the heat transfer element.
- a holding mechanism that guides the sensor socket and is attached to the outer section of the heat transfer element.
- other sensor types and connections are also possible.
- an electrical NTC or PTC sensor can also be used, which is spring-loaded or is fixedly attached to the outer section of the heat transfer element.
- the heat transfer element can be grounded, which provides protection against contact
- a glass ceramic cooktop is known from US Pat. No. 4,447,710, in which an insulation body is arranged in the edge region of the heating element, on which a
- Temperature sensor for example, a thermocouple is seated.
- the thermocouple is in good thermal contact with the underside of the glass ceramic plate is maintained by means of the insulation block
- the object of the present invention is to provide a generic cooktop and a corresponding heating element which have good measurement accuracy with simple assembly
- a heat-conducting element within the heating element is in heat-conducting contact with the underside of the cooktop plate, and in that the temperature sensor is fastened to the element in this area.
- a corresponding heating element is furthermore As well as an element for the heating element, good measuring accuracy can be achieved by sensing the hotplate temperature inside the heating element in the edge area.
- the relative position of the temperature sensor to the heat-conducting element and its heat-conducting behavior are precisely defined Testable as well as easy to handle in terms of assembly technology, because larger and more stable structural unit is provided
- the thermal coupling of the heat-conducting element to the underside of the hob plate inside the heating element and the simultaneous attachment of the temperature sensor to the element mean that the temperature sensor is easy to position and mount, so that it is optimal on the hob plate or on a saucepan placed on it coupled
- the temperature sensor is arranged in the region of a temperature limiter of the heating element.
- all electrical connections are spatially combined on the heating element in a manner that is favorable in terms of assembly technology, and on the other hand the respective minimum distances between the electrical connections are maintained in accordance with the relevant VDE regulations
- the heat-conducting element is fastened, in particular screwed, in the area of the outer peripheral wall of the heating element or the iso-carrier, or is screwed on, in particular is simply attached and extends into the area of the outer peripheral wall of the heating element, in which the element is in turn screwed to the intermediate mounting part in order to adjust the contact pressure or the contact surface of the element and thus, among other things, the thermal coupling of the element to the underside of the hob plate can, the element can be screwed to the outer peripheral wall of the heating element in different heights
- the temperature sensor is attached to the underside of the element.
- this allows a large and flat contact surface to be used to improve the heat conduction from the underside of the glass ceramic plate to the temperature sensor.
- the temperature sensor is in the assembly process due to the larger, flat element. Eg when the element / temperature sensor unit falls down, better mechanically protected
- the element can have a receiving section for the temperature sensor and a mounting section for fastening the element, in particular to the heating element, the receiving section being located radially laterally offset from the mounting section.
- the element is formed at least in two parts.
- a receiving part for the temperature sensor consists of a softer material in order to optimally geometrically deform the receiving part in terms of application and safety technology It should also be noted that the thermal conductivity of the material used is sufficient.
- the rest of the element can be made of another, for example, harder material, whereby a spring material is particularly suitable in order to be able to press the element onto the underside of the glass ceramic plate in a defined manner
- Torsion spring is formed, wherein the torsion area of the spring element is provided essentially outside 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 are adequately shielded from heat radiation emitted by a heating element of the heating element by means of an insulation body
- the electrical lines of the temperature sensor are connected to a first connection section of the
- the element can accordingly also have a second connection section, to which an earth line of the element is connected
- FIG. 1 is a sectional view substantially along the line l-l in FIG. 2, the hob with a heating element according to the first exemplary embodiment
- FIG. 2 shows a perspective view from above of the heating element alone according to the first exemplary embodiment 3 on an enlarged scale in a perspective view from below the heat conducting element from FIG. 1 and FIG. 2 without the temperature sensor,
- FIG. 4 is a greatly simplified sectional view of the heating element with the heat-conducting element according to the second exemplary embodiment
- FIG. 6 shows a block diagram of the hob according to the invention
- a cooktop 1 has a cooktop plate 3, in particular made of glass ceramic (Fig. 1) Below the cooktop plate 3, in a manner known per se, various heating elements 5 of the cooktop are provided, which are printed in a known manner on the underside of the cooktop plate 3 (not shown). In the area of the heating element 5, the top of the cooktop 3 is usually appropriately decorated.A cooking vessel 6 can be placed in this heated area. The bottom of the cooking vessel 6 in the cold state is often only in the edge area of the heating element 5 in an annular area on the cooktop 3 while central remaining area of the pot bottom by a
- the heating element 5 has a cup-like tin pot 7, in which a circular disk-shaped insulation plate 9 is furthermore inside of the tin pot 7 on the insulation plate 9, an inner insulation ring 11 and an outer insulation 13 according to a dual-circuit heating arrangement are provided. As a result, the interior of the heating element 5 is separated into an inner and an outer heating area, in each of which a strip heating conductor 15 extends (FIG. 1 Fig.
- a heating conductor connection part 17 is fastened in the region of the outer peripheral wall of the tin pot 7, which is conductively connected on the one hand to the band heating conductors 15 and on the other hand can be connected to electrical supply lines (not shown) of the hob 1 (FIG. 2)
- Element 5 also has a known temperature limiter 19, the rod of which extends across the heated area of the heating element
- Temperature limiter 19 has the known and customary, laterally flared contact pins for connection to the voltage supply line or to the heating conductor connection part 17 of the heating element 5.
- An insulation block 21 is arranged in the area of the temperature limiter 19 between the inner insulation ring and the outer insulation ring 13. This can serve for this purpose , the temperature limiter 19 in
- a receiving recess 23 is milled in the upper side thereof.
- a heat conducting element 25 with its element hood 27 is arranged in it (FIGS. 1, 2, 3) It should be noted that the hood 27 does not sit directly on the bottom of the recess 23, so that the hood 27 can yield slightly when the hob plate 3 is hit. Damage or breakage of the plate 3 can be avoided, especially if it is made of glass. or glass ceramic material
- a PT- is used as a temperature sensor 29 by means of a temperature-resistant and heat-conducting ceramic adhesive 28.
- the material of the element cover 27 is X7 steel and the cover 27 is designed as a bent part for this purpose.
- the cover material must have sufficiently good heat conduction properties and must be easily deformable, as explained below, however Sufficiently mechanically stable over the entire temperature range of up to 350-400 ° C, and maintaining its properties even at these temperatures.
- Receiving space of the hood is closed by an end wall 35 bent at right angles from the top wall.
- the hood-shaped design of the element 25 ensures that the safety-related air and creepage distance to the live temperature sensor 29 is maintained in the event of a break in the hob plate 3 without the base surface of the element 25 or the hood 27 and thus the insulation block 21 must be made too large. More precise designs for the geometric design and arrangement of the temperature sensor 29, the element 25 and the insulation block 21 are made in connection with the description of the third exemplary embodiment outlined in FIG. 5.
- the hood 27 is firmly connected to an essentially L-shaped hood support 37 made of steel, preferably welded.
- the element hood 27 is seated on a connecting section 39 of the hood support 37 (Fig 3) This is the top wall of the
- Element hood 27 is arranged slightly elevated in relation to the top of the hood support 37 and defines and delimits a flat area A in which the element 25 lies in a heat-conducting manner on the underside of the hob plate 3 (FIGS. 1, 2, 5) due to the overlapping connection of the hood 27 and hood carrier 37 the stability of the connection is also increased. While the hood support 37 is made of 0.8 mm thick material in order to be suitable for the earthing plug connections described below, the element hood 27 is made of thinner material, which further simplifies its reshaping
- the hood support 37 merges into a mounting section 43 in a spring section 41 (FIGS. 2, 3).
- the spring section 41 is arranged essentially outside the heated area of the heating element 5 or the outer insulation ring 13.
- the mounting section 43 of the hood support 37 has a downward right angle Bent mounting plate 45 with mounting openings 47 Through the mounting openings 47, the heat-conducting element 25 can be attached in a highly adjustable manner via an intermediate mounting part 48 to the outer peripheral wall of the tin pot 7 (FIG. 2).
- the intermediate mounting part 48 on the one hand on the underside of the tin pot 7 in the bottom thereof is screwed (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 the position of the heat conducting element 25 can thus be defined to a high degree n
- Elaborate screwing openings in the side wall of the tin pot 7 are omitted and the openings which are always present on the bottom side in the tin pot can be used as an alternative.
- the heat-conducting element 25 can also be screwed to the outer wall of the tin pot 7 in the area of the mounting openings 47 are fastened (not shown), with which the electrical sensor lines 30 of the temperature sensor 29 can be connected, for example, can be plugged in, and on the other hand Electrical connecting lines of a control unit 101 (FIG. 6) of the hob 1 are connected.
- the connecting part furthermore ensures that the electrical connections of the PT temperature sensor 29 are insulated from earth or the grounded hood bracket 37 Temperature sensors and the sensor lines 30 are covered over their entire length by the heat-conducting element 25 on the top side.To better guide the lines 30, they can be glued to the underside of the element 25 in the area of the hood support 37 and / or held by guide elements formed on the support 37 Mounting plate 45 on a flat pin 49 on which a ground line 51 or its standardized AMP connector of the
- the heat-conducting element 25 is connected to ground potential. It must be ensured that the ohmic resistance of the element 25 is at a value of 0.1 ohm or less in order to withstand a continuous current load of at least 25 A. Furthermore, the heat-conducting element 25 also not be made too stiff in order to be able to yield appropriately when subjected to mechanical stress or movement of the hob plate 3. Otherwise, due to the element 25 or the element hood 27 being too rigidly attached to the hob plate 3, the hotplate flake off on the underside of the plate 3 or possibly also To fear their breakage Furthermore, it should be noted that an improvement in the heat conduction from the underside of the hob plate 3 to
- Heat-conducting element 25 can be reached if the spaces between the knobs formed on the underside of the glass ceramic plate are filled with a heat-conducting paste or a suitable adhesive
- the heat-conducting element 25 does not have an element hood, but an element shell 77.
- This element shell is likewise arranged in a suitable receiving recess 23 of the insulation block 21.
- the edge of the insulation shell rests in an annular area directly on the underside of the glass ceramic plate 3 and is therefore in a heat-conducting connection with it.
- the temperature sensor 29 is arranged in the element shell 77, the shell is additionally filled with a heat-conducting paste.
- the heat-conducting element 75 (not shown in more detail) could otherwise be shaped like the heat-conducting element 25 of the first exemplary embodiment.
- the temperature sensor 29 is operated with a protective terminal voltage or transmits its measurement signal without contact from the heating element
- the heat-conducting element 85 for example in the form of a hood, has an element hood 87 which corresponds to that of the first exemplary embodiment
- the mounting section 89 extends radially downward along the outer wall of the tin pot 7, vertically downward.
- FIG. 5 shows schematically the area A in which the heat-conducting element 85 is thermally in contact with the underside of the hob plate 3. The size of the area is approximately 50 to 100 mm 2 It is also shown that the contact area A is approximately 10 times larger than a base area B of the temperature sensor 29.
- the temperature sensor 29 and Element hood 27 are adequately shielded by the insulation block 21, on the one hand, against the thermal radiation emanating from the strip heating conductor 15, on the other hand, the insulation block is still small enough to be disadvantageous when heating or roasting To be able to avoid shading of the cooking vessel base 6 and an undesired, uneven heat distribution in the pan base caused in this way.
- the heat conducting element 25 is still sufficiently thermally coupled to the area of the hob plate which is heated directly by the heat radiation from the heating medium 15.
- the temperature sensor 29 is at the same time covered with respect to the hob plate 3 by a grounded protective element 27, taking into account the 4 or 8 mm gap and air gap required according to the requirements. Also, by enlarging the thermally in contact with the underside of the hob plate 3 Flat surface achieved, that despite all assembly tolerances, a sufficiently good warm contact is made between the flat-sized, smaller temperature sensor and the hob plate 3. This is particularly important if a glass ceramic Kochfeidplatte 3 is used, the knob geometry is in the order of the temperature sensor 29 above statements about the design of the geometries, distances and large proportions apply to all three exemplary embodiments
- Measuring surface A is coupled by a high-temperature lubricant to the underside of the cooktop plate, which consists in particular of glass ceramic material, in order to achieve improved heat transfer and improved damping under impact loads
- FIG. 6 A block diagram is shown schematically in FIG. 6, which shows the most important components of the hob.
- the control unit 101 regulates the heating output of the
- Band heating conductor 15 corresponding to the measured values of the temperature sensor 29 to the target value specified by an input unit 103. In this way, it can be achieved in particular that scorching is almost impossible during roasting
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Electric Stoves And Ranges (AREA)
- Control Of Resistance Heating (AREA)
- Cookers (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10006974 | 2000-02-16 | ||
DE10006974A DE10006974A1 (de) | 2000-02-16 | 2000-02-16 | Kochfeld mit Temperaturfühler |
PCT/EP2001/001428 WO2001062049A1 (de) | 2000-02-16 | 2001-02-09 | Kochfeld mit temperaturfühler |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1258172A1 true EP1258172A1 (de) | 2002-11-20 |
EP1258172B1 EP1258172B1 (de) | 2006-09-13 |
Family
ID=7631141
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01905756A Expired - Lifetime EP1258172B1 (de) | 2000-02-16 | 2001-02-09 | Kochfeld mit temperaturfühler |
Country Status (5)
Country | Link |
---|---|
US (1) | US7573003B2 (de) |
EP (1) | EP1258172B1 (de) |
AT (1) | ATE339867T1 (de) |
DE (2) | DE10006974A1 (de) |
WO (1) | WO2001062049A1 (de) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6756569B2 (en) * | 2001-05-11 | 2004-06-29 | Emerson Electric Co. | Temperature sensor for heater unit in cooktop range |
DE102005040041B3 (de) | 2005-08-23 | 2006-10-19 | Miele & Cie. Kg | Glaskeramikkochfeld mit wenigstens einem Kochfeldbereich |
KR100771628B1 (ko) * | 2006-05-11 | 2007-10-31 | 엘지전자 주식회사 | 전기레인지 |
US9320293B2 (en) * | 2008-06-06 | 2016-04-26 | Gold Medal Products Company | Popcorn kettle |
ES2428243R1 (es) * | 2012-02-10 | 2013-12-10 | Bsh Electrodomesticos Espana | Aparato de cocción y procedimiento para la regulación de la temperatura en dicho aparato |
EP2631545B1 (de) * | 2012-02-22 | 2017-05-17 | Electrolux Home Products Corporation N.V. | Heizplatte mit mindestens einem Temperatursensorelement |
US10018514B2 (en) * | 2014-02-17 | 2018-07-10 | Haier Us Appliance Solutions, Inc. | Cooktop temperature sensors and methods of operation |
ES1135492Y (es) * | 2014-12-11 | 2015-04-13 | Eika S Coop | Foco radiante adaptado a una encimera de cocción |
US20160227609A1 (en) * | 2015-01-30 | 2016-08-04 | Schott Corporation | Multi function glass or glass-ceramic cooktop system and method of cooking thereon |
USD796900S1 (en) | 2015-12-17 | 2017-09-12 | Dan Lowry Llc | Heat diffuser |
US10136664B2 (en) | 2016-07-11 | 2018-11-27 | Gold Medal Products Company | Popcorn popping machines and methods for different types of popcorn kernels and different popped popcorn types |
US10634363B2 (en) * | 2017-10-18 | 2020-04-28 | Haier Us Appliance Solutions, Inc. | Spring bracket for a cooktop appliance |
DE102019211101A1 (de) * | 2019-07-25 | 2021-01-28 | E.G.O. Elektro-Gerätebau GmbH | Strahlungsheizeinrichtung und Kochfeld mit einer solchen Strahlungsheizeinrichtung |
Family Cites Families (12)
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 |
DE7732760U1 (de) * | 1977-10-24 | 1980-01-17 | Bosch-Siemens Hausgeraete Gmbh, 7000 Stuttgart | Elektrokochgeraet |
DE2747652C2 (de) * | 1977-10-24 | 1984-04-05 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | Elektrokochgerät |
US4241289A (en) * | 1979-03-02 | 1980-12-23 | General Electric Company | Heat sensing apparatus for an electric range automatic surface unit control |
DE2923884C2 (de) | 1979-06-13 | 1982-12-02 | E.G.O. Elektro-Geraete Blanc U. Fischer, 7519 Oberderdingen | Regeleinrichtung zur Ankopplung an Heizelemente für Glaskeramik-Kochflächen |
DE8109131U1 (de) * | 1981-03-27 | 1981-08-20 | E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen | Temperaturfuehlanordnung fuer elektrische strahlheizkoerper |
US4447710A (en) | 1981-08-08 | 1984-05-08 | Micropore International Limited | Electric cookers incorporating radiant heaters |
US4755655A (en) * | 1986-12-04 | 1988-07-05 | General Electric Company | Thermal protection arrangement for solid disk glass cooktop |
DE3703768A1 (de) | 1987-02-07 | 1988-08-18 | Fissler Gmbh | Vorrichtung zum erfassen der temperatur einer mittels heizwicklungen oder halogenlampen aufgeheizten glaskeramikplatte |
JPH0464025A (ja) * | 1990-07-02 | 1992-02-28 | Matsushita Electric Ind Co Ltd | 調理器用温度センサー |
DE19604306C2 (de) * | 1996-02-07 | 2000-05-11 | Ako Werke Gmbh & Co | Strahlungsheizkörper |
GB2335541A (en) * | 1998-03-20 | 1999-09-22 | Ceramaspeed Ltd | Electric heater comprising a temperature sensing and limiting arrangement |
-
2000
- 2000-02-16 DE DE10006974A patent/DE10006974A1/de not_active Withdrawn
-
2001
- 2001-02-09 EP EP01905756A patent/EP1258172B1/de not_active Expired - Lifetime
- 2001-02-09 WO PCT/EP2001/001428 patent/WO2001062049A1/de active IP Right Grant
- 2001-02-09 DE DE50111005T patent/DE50111005D1/de not_active Expired - Lifetime
- 2001-02-09 AT AT01905756T patent/ATE339867T1/de not_active IP Right Cessation
-
2002
- 2002-08-16 US US10/223,041 patent/US7573003B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0162049A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE10006974A1 (de) | 2001-08-23 |
ATE339867T1 (de) | 2006-10-15 |
EP1258172B1 (de) | 2006-09-13 |
US7573003B2 (en) | 2009-08-11 |
DE50111005D1 (de) | 2006-10-26 |
US20030019863A1 (en) | 2003-01-30 |
WO2001062049A1 (de) | 2001-08-23 |
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