EP1258170A1 - Cooking surface comprising a temperature sensor - Google Patents
Cooking surface comprising a temperature sensorInfo
- Publication number
- EP1258170A1 EP1258170A1 EP01903691A EP01903691A EP1258170A1 EP 1258170 A1 EP1258170 A1 EP 1258170A1 EP 01903691 A EP01903691 A EP 01903691A EP 01903691 A EP01903691 A EP 01903691A EP 1258170 A1 EP1258170 A1 EP 1258170A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heating element
- temperature sensor
- hob
- heating
- area
- 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 hob according to the preamble of
- 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 gives a signal corresponding to the temperature of the glass ceramic
- Control circuit from The heating windings or the halogen lamps are arranged in the interior of a pot-like insulation support and heat the glass ceramic plate via direct radiation.
- the edge of the insulation support rests on the underside of the glass ceramic plate under spring tension, and the temperature sensor is outside the interior of the insulation support, but inside the heating element. arranged
- the temperature sensor is still in a heat-conducting connection with the underside of the glass ceramic plate, the temperature sensor being arranged in a receptacle in the edge of the insulating support.
- the receptacle is arranged at a distance x from the inside of the edge of the insulating support, the minimum value of which is selected such that when it is switched on Switching the heating windings or the halogen lamps on and off only have a negligible influence on the temperature sensor.
- the maximum value of the distance x is chosen so that the delay due to the thermal conductivity of the glass ceramic plate results in a small hysteresis.
- the distance x has been found Widths from 3 mm to 6 mm have been found to be advantageous.
- the temperature sensor is inserted into the inserted or printed receptacle on the top of the extension, which protrudes into the interior of the insulating support, and is in white with the underside of the glass ceramic plate Sleeve-conductive connection
- the temperature sensor is held indirectly 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 low
- 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 partially covers 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 attached to 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
- Heat transfer surface of the heat transfer element is printed, 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.
- sensors 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, if desired, 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 sits The thermocouple is kept in good thermal contact with the underside of the glass ceramic plate by means of the insulation block
- the object of the present invention is to provide a generic cooktop and a corresponding heating element, which has good measurement accuracy with simple assembly According to the invention this is achieved in that in a cooktop according to the preamble of claim 1, the temperature sensor is attached to an element which extends from an area inside the heating element to an area outside the heating element, and in that the element has a receiving section inside the heating element for has the temperature sensor and a mounting section for attaching the element, in particular to the heating element, and / or a connection section for connecting at least one electrical line outside the heating element, which receiving section is radially laterally offset from the mounting section or connection section.
- the relative position of the temperature sensor to the element and their heat conduction behavior are precisely defined and it is a preassembled erable and testable in advance as well as easy to handle in terms of assembly technology, because a larger, unit is provided.
- the simultaneous attachment of the temperature sensor to the element is therefore optimally coupled to the hob plate or to a cooking pot placed thereon, with easy positioning and mounting of the temperature sensor
- the temperature sensor is arranged in the area of a temperature limiter of the heating element.
- all electrical connections can be spatially combined in an assembly-technically advantageous manner, and on the other hand, the respective minimum distances between the electrical connections are reliably maintained by the temperature limiter in accordance with the relevant VDE regulations the installation space in the area of the outer peripheral wall of the heating element is restricted, but on the other hand it is advantageous if the various electrical connections of the temperature limiter and the temperature sensor are as close as possible in a safety-related manner
- the heat-conducting element is fastened, in particular screwed, directly or with the aid of an intermediate assembly part in the region of the outer circumferential wall of the heating element or the insulation support Heating element is 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 be able to adjust the contact pressure or the contact surface of the element and thus
- the temperature sensor is attached to the underside of the element.
- this allows a large, flat contact surface to improve the heat conduction from the underside of the glass ceramic plate to the temperature sensor.
- the temperature sensor is due to the flat-sized larger element in the assembly process, e.g. B when the element / temperature sensor unit falls down, better mechanically protected
- 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 optimally deform the receiving part specifically in terms of application and safety technology.
- the rest of the element can consist of a different material, in particular a spring material being suitable, in order to be able to print the element on the underside of the glass ceramic plate
- the element is designed as a torsion spring, the torsion area of the spring element being provided essentially outside the heating element and thus in a cooler area.
- a particularly compact structural unit is produced if the spring is essentially L-shaped
- the element is designed to be electrically conductive and grounded in order to optimally meet the safety regulations with a simple structure
- the heating element of the heating element is shielded from outgoing heat radiation
- the electrical lines of the temperature sensor are connected to a first connection section of the element or a connection piece mounted there.
- the element can also have a second connection section, on which one
- 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 is a perspective view from above of the heating element alone according to the first exemplary embodiment
- FIG. 4 is a greatly simplified sectional view of the heating element with the heat-conducting element according to the second exemplary embodiment
- Fig. 5 in a view from above in sections of the heating element with the heat conducting element according to the third 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 there are various types known per se
- 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).
- the cooktop plate 3 is usually appropriately decorated on the top side.
- a cooking vessel 6 can be placed.
- the bottom of the cooking vessel 6 in the cold state is often only in the ring area of the heating element 5 in an annular surface on the hob plate 3, while in the central remaining area the pan base is spaced from the plate by an air gap (FIG. 1). In the heated state, this air gap decreases or ideally becomes almost zero due to the known thermally induced movement of the pot base
- the heating element 5 has a cup-like tin pot 7, in which a circular disk-shaped insulation plate 9 also holds.
- Tin pot 7 attached to a heating conductor connection part 17, 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).
- the heating element 5 also has a temperature limiter 19 known per se, the rod of which extends across extends 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. 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 this (FIGS. 1, 2, 3). It should be noted that the hood 27 does not open directly sits on the bottom of the recess 23 so that the hood 27 can yield slightly when struck on the hob plate 3. Damage or breakage of the plate 3 can be avoided, in particular if it is made of glass or glass ceramic material
- a PT-500 sensor with its sensor lines 30 is embedded and thereby fastened and guided by means of a temperature-resistant and heat-conductive ceramic adhesive 28 as the temperature sensor 29.
- the material of the element cover 27 is X7 steel and the cover 27 is for this purpose designed as a bent part
- the hood material must have sufficiently good heat conduction properties, must be easily 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
- the hood-shaped design of the element 25 ensures that the air and creepage distance to the live temperature sensor 29, which is prescribed in terms of safety technology, 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
- the hood 27 has an essentially L-shaped hood support 37 made of steel firmly connected, preferably welded. For this purpose, the element hood 27 sits on a
- the top wall of the element hood 27 is slightly raised relative to the top of the hood support 37 arranged and defines and delimits a flat area A, in which the element 25 rests on the underside of the hob plate 3 in a heat-conducting manner (FIGS. 1, 2, 5).
- the overlapping connection of the hood 27 and the hood support 37 also increases the stability of the connection, while the hood support 37 consists of 0.8 mm thick material, in order to be suitable for the earthing plug connections described below, the element cover 27 consists 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 mounting plate 45 with mounting openings 47 which is bent downwards at a right angle.
- the mounting openings 47 allow the heat-conducting element 25 to be attached to the outer circumferential wall of the tin pot 7 in a highly adjustable manner via an intermediate mounting part 48 (FIG. 2) on the one hand at the bottom of the
- Tin pot 7 is screwed into its bottom (not shown) This part 48 extends approximately L-shaped from the bottom of the heating element to its side wall 7. In the side wall area, the heat-conducting element 25 is then screwed to the intermediate mounting part 48 and so the position of the heat-conducting element 25 is high Can be defined in a defined manner This allows complex screw openings in the side wall of the
- Tin pot 7 is omitted and the openings that are always present on the bottom side of 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.
- a connecting part can be fastened in the mounting holes 47 (not shown), with the one hand the electrical sensor lines 30 of the
- Temperature sensors 29 can be connected, for example plugged in, and to which, on the other hand, electrical connecting lines of a control unit 101 (FIG. 6) of the hob 1 are connected. This provides a secure strain relief for the sensor lines 30.
- the connecting part furthermore ensures that the electrical connections of the PT -Temperature sensor 29 to ground or grounded
- Hood support 37 are insulated
- the temperature sensor and the sensor lines 30 are covered over their entire length by the heat conducting element 25 on the top side better guidance of the lines 30, these 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.
- the mounting plate 45 has a flat pin 49 on which an earthing line 51 or its standardized AMP Plug of the cooktop can be plugged in immediately. As a result, the heat-conducting element 25 is open
- 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.
- the heat-conducting element 25 must also not be too stiff to prevent mechanical To be able to give in to the load or movement of the cooktop plate 3 in a suitable manner, otherwise there was a risk that the element 25 or the element hood 27 would be too stiff against the cooktop plate 3 or the chip breaker on the underside of the plate 3 or, if necessary, its breakage.
- FIG. 4 sections are in a sectional representation transverse to the longitudinal extension of the element and thus approximately perpendicular to line II in FIG. 2 the area of the hob is shown in which the temperature sensor 29 is arranged together with a heat-conducting element 75 in the area of the insulation block 21 similar to the first exemplary embodiment.
- the heat-conducting element 25 has none
- an element shell 77 on this element shell is also arranged in a suitable receiving recess 23 of the insulation block 21.
- the edge of the insulation shell lies in an annular area directly on the underside of the glass ceramic plate 3 and is therefore in heat-conducting connection with it in the element shell 77 the temperature sensor 29 is arranged, the shell being additionally filled with a heat-conducting paste.
- the heat-conducting element 75 could otherwise, like the heat-conducting element 25 of the first exemplary embodiment.
- the temperature sensor 29 is operated with a protective extra-low 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 shows 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 about 50 to 100 mm 2. It is also shown that the contact area A is about 10 times larger than a base area B of the Temperature sensor 29 This ensures, among other things, that the temperature on the underside of the hob plate is not determined by the temperature sensor in a quasi-punctiform manner, but rather integrally over a larger area. This is particularly important because the particular one
- Pan diameter and its bottom quality are not exactly known and can additionally vary from pan type to pan type.
- a lateral minimum distance a of the element 85 to the edge region of the insulation material 21 is approximately 8 mm. This provides an optimal geometry, which has the following advantages for the precise regulation of the heating power
- the temperature sensor 29 and the element cover 27 are adequately shielded by the insulation block 21, on the one hand, against the heat radiation emanating from the band heating conductor 15, and on the other hand, the insulation block is still small enough to be used for cooking To be able to avoid heating or roasting a disadvantageous shading of the cooking vessel base 6 and an undesirably uneven heat distribution in the pan base caused thereby.
- the heat conducting element 25 is still sufficiently good thermal to the area of the hob plate coupled, which is heated directly by the heat radiation from the heating means 15.
- the temperature sensor 29 with respect to the hob plate 3 is grounded by a grounded protective element 27, taking into account the 4- or 8-mm Kechech- and air distance is also covered by the enlargement of the Underside of the cooktop 3 thermally in contact with the surface is reached, which, despite all the mounting tolerances, produces a sufficiently good thermal contact between the flat-sized, smaller temperature sensor and the cooktop 3. This is particularly important if a glass ceramic cooktop 3 with a nub on the underside is used, whose Stud geometry on the order of
- Temperature sensor 29 maintains the above statements on the design of the geometries, distances and large ratios apply to all three exemplary embodiments. If necessary, the measuring area A is coupled to the underside of the hob plate, which consists in particular of glass ceramic material, by means of a high-temperature lubricant in order to achieve improved heat transfer and improved shock absorption when subjected to impact loads
- FIG. 6 A block diagram is shown schematically in FIG. 6, which shows the most important components of the cooktop.
- the control unit 101 regulates the heating output of the band heating conductor 15 in accordance with the measured values of the temperature sensor 29 to the desired value specified by an input unit 103 burning is almost impossible
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Electric Stoves And Ranges (AREA)
- Cookers (AREA)
- Control Of Resistance Heating (AREA)
- Resistance Heating (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10006954A DE10006954A1 (en) | 2000-02-16 | 2000-02-16 | Ceramic cooking hob has temperature sensor supported by fixing element extending from point on outside of heating element in contact with underside of hob surface on inside of heating element |
DE10006954 | 2000-02-16 | ||
PCT/EP2001/001145 WO2001062046A1 (en) | 2000-02-16 | 2001-02-02 | Cooking surface comprising a temperature sensor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1258170A1 true EP1258170A1 (en) | 2002-11-20 |
EP1258170B1 EP1258170B1 (en) | 2007-12-19 |
Family
ID=7631126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01903691A Expired - Lifetime EP1258170B1 (en) | 2000-02-16 | 2001-02-02 | Cooking surface comprising a temperature sensor |
Country Status (5)
Country | Link |
---|---|
US (1) | US6580058B2 (en) |
EP (1) | EP1258170B1 (en) |
AT (1) | ATE381875T1 (en) |
DE (2) | DE10006954A1 (en) |
WO (1) | WO2001062046A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3771287A1 (en) | 2019-07-25 | 2021-01-27 | E.G.O. Elektro-Gerätebau GmbH | Radiation heating device and hob with such a radiation heating device |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2360591B (en) * | 2000-03-23 | 2004-04-28 | Ceramaspeed Ltd | Temperature sensor |
DE10250317B4 (en) | 2002-10-29 | 2004-10-28 | Schott Glas | Glass or glass ceramic plate with an electric heating unit |
GB0313703D0 (en) * | 2003-06-13 | 2003-07-16 | Ceramaspeed Ltd | Temperature sensor assembly for an electrical heating arrangement |
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 |
KR100771628B1 (en) * | 2006-05-11 | 2007-10-31 | 엘지전자 주식회사 | Electricity oven |
ES2341827B1 (en) * | 2008-05-23 | 2011-05-16 | Bsh Electrodomesticos España, S.A. | COOKING FIELD WITH A COOKING FIELD PLATE. |
DE102008058318B3 (en) * | 2008-11-21 | 2010-06-17 | Schott Ag | Scratch-resistant silicone coating for cooking surfaces made of glass or glass ceramic |
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 |
CN112050954B (en) * | 2019-06-05 | 2022-06-24 | 志圣工业股份有限公司 | Temperature measuring device |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3906424A (en) * | 1974-05-13 | 1975-09-16 | Therm O Disc Inc | Cooking range and control therefor |
DE2923884C2 (en) | 1979-06-13 | 1982-12-02 | E.G.O. Elektro-Geraete Blanc U. Fischer, 7519 Oberderdingen | Control device for coupling to heating elements for glass ceramic cooking surfaces |
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 |
DE8706277U1 (en) * | 1987-05-01 | 1987-06-25 | E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen | Electric radiant heater for heating a plate, in particular a glass ceramic plate |
DE9113992U1 (en) * | 1991-11-12 | 1992-01-02 | E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen | Radiant heating unit |
DE4138817A1 (en) * | 1991-11-26 | 1993-05-27 | Ego Elektro Blanc & Fischer | TEMPERATURE DETECTION DEVICE |
DE4224934C2 (en) * | 1992-07-28 | 2003-05-15 | Bsh Bosch Siemens Hausgeraete | Radiator with sensor technology for a pan detection system |
DE19604306C2 (en) * | 1996-02-07 | 2000-05-11 | Ako Werke Gmbh & Co | Radiant heater |
GB2335541A (en) * | 1998-03-20 | 1999-09-22 | Ceramaspeed Ltd | Electric heater comprising a temperature sensing and limiting arrangement |
DE19846512A1 (en) * | 1998-10-09 | 2000-04-13 | Ego Elektro Geraetebau Gmbh | Installation of a housing of a switching device |
-
2000
- 2000-02-16 DE DE10006954A patent/DE10006954A1/en not_active Withdrawn
-
2001
- 2001-02-02 DE DE50113397T patent/DE50113397D1/en not_active Expired - Lifetime
- 2001-02-02 EP EP01903691A patent/EP1258170B1/en not_active Expired - Lifetime
- 2001-02-02 AT AT01903691T patent/ATE381875T1/en not_active IP Right Cessation
- 2001-02-02 WO PCT/EP2001/001145 patent/WO2001062046A1/en active IP Right Grant
-
2002
- 2002-08-16 US US10/223,040 patent/US6580058B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0162046A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3771287A1 (en) | 2019-07-25 | 2021-01-27 | E.G.O. Elektro-Gerätebau GmbH | Radiation heating device and hob with such a radiation heating device |
Also Published As
Publication number | Publication date |
---|---|
US6580058B2 (en) | 2003-06-17 |
WO2001062046A1 (en) | 2001-08-23 |
US20030024923A1 (en) | 2003-02-06 |
ATE381875T1 (en) | 2008-01-15 |
DE50113397D1 (en) | 2008-01-31 |
EP1258170B1 (en) | 2007-12-19 |
DE10006954A1 (en) | 2001-10-11 |
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