EP0114307B1 - Temperaturregeleinrichtung für ein Wärmegerät - Google Patents

Temperaturregeleinrichtung für ein Wärmegerät Download PDF

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Publication number
EP0114307B1
EP0114307B1 EP83112652A EP83112652A EP0114307B1 EP 0114307 B1 EP0114307 B1 EP 0114307B1 EP 83112652 A EP83112652 A EP 83112652A EP 83112652 A EP83112652 A EP 83112652A EP 0114307 B1 EP0114307 B1 EP 0114307B1
Authority
EP
European Patent Office
Prior art keywords
heat transfer
temperature
tube
transfer member
switch
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
Application number
EP83112652A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0114307A1 (de
Inventor
Gerhard Gössler
Hans Mohr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Gerate Blanc und Fischer GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by EGO Elektro Gerate Blanc und Fischer GmbH filed Critical EGO Elektro Gerate Blanc und Fischer GmbH
Priority to AT83112652T priority Critical patent/ATE29820T1/de
Publication of EP0114307A1 publication Critical patent/EP0114307A1/de
Application granted granted Critical
Publication of EP0114307B1 publication Critical patent/EP0114307B1/de
Expired legal-status Critical Current

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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
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0202—Switches
    • H05B1/0213—Switches using bimetallic elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F24C15/102—Tops, e.g. hot plates; Rings electrically heated
    • F24C15/105—Constructive details concerning the regulation of the temperature
    • 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
    • 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
    • H05B3/748—Resistive heating elements, i.e. heating elements exposed to the air, e.g. coil wire heater
    • 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
    • H05B2213/04—Heating plates with overheat protection means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/07—Heating plates with temperature control means

Definitions

  • the invention relates to a temperature regulating or control device for a heating device with an elongated, in particular rod-shaped or tubular, temperature sensor exposed to heat with a control device arranged at its end for reducing the heat output of the heating device, in particular with a between a radiant heater and a glass ceramic.
  • a control device arranged at its end for reducing the heat output of the heating device, in particular with a between a radiant heater and a glass ceramic.
  • a temperature sensor for a temperature limiting device which consists of a sleeve made of quartz glass and a metallic rod of greater thermal expansion arranged inside the sleeve.
  • One end of this rod acts on a snap switch, so that the snap switch is actuated when a certain temperature is reached.
  • the snap switch or another switch sits e.g. in an insulated housing made of steatite, in which the power transmission elements are accommodated between the metal rod and the adjustable snap switch with its electrical leads.
  • a temperature control device of the type mentioned at the beginning (US-A 3710076), in which a temperature-sensitive element, preferably with a temperature-variable electrical resistance, rests on the underside of a glass ceramic cooking surface.
  • the invention has for its object to provide a temperature control or control device of the type mentioned, which is easy and inexpensive to manufacture and yet has an accurate temperature behavior, with commercially available bimetal switches can be used.
  • the temperature sensor is designed as a heat transfer element, which is formed by a tube made of scale-free material, in particular stainless steel, with an inner rod arranged therein, preferably made of copper, and is thermally coupled to at least one temperature switch which is outside the heated area.
  • the heat sensor acts on a switch due to different expansion or different electrical resistance
  • the heat sensor is used to conduct the heat to the switch, this switch then being a commercially available bimetal switch can.
  • the scale-free stainless steel is able to withstand the high temperatures even under continuous use, while the material arranged inside is used due to its good thermal conductivity.
  • the temperature sensor which in particular can also be rod-shaped, can be guided over the radiant heater, for example, along a diameter, it is of course also possible to use it in curved shapes.
  • the temperature switch is located outside the heated area, in particular in the area of one end of the heat transfer element.
  • the temperature switch is a commercially available switch, in particular with a bimetal spring washer. This bime
  • the invention proposes in a further development that the tube is closely connected to the inner rod by pressing, in particular in the form of a prism. This has the advantage that there is a tight connection between the inside of the tube and the inner rod, so that not only is there a good heat transfer, but above all there is even heat transfer at all points of the temperature sensor.
  • the tube and / or the copper wire is pressed with a cable lug to which the temperature switch is attached, in particular screwed on.
  • the crimping with the cable lug can be carried out simultaneously with the crimping of the tube and inner rod, so that only a single operation is required.
  • the cable lug is preferably also made of copper, preferably with a temperature-resistant surface, which can in particular be a nickel plating.
  • the tube has an at least one-sided flattened, in particular triangular cross-section, which may arise when pressing with the inner rod.
  • This design makes it possible to allow the tube to rest directly on the underside of a glass ceramic cooktop, advantageously with the flattened side. This in turn leads to good heat transfer from the surface whose heat is to be monitored to the rod.
  • a semicircular cross section can also be used.
  • the invention further proposes that the dimensions and / or the shape and / or the thermal conductivity of the tube and / or the inner rod are selected such that the permissible permanent temperature of the temperature switch is not exceeded.
  • the wall thickness of the tube must be selected so that there is good transmission to the inner rod.
  • the temperature sensor can also be guided in an arch form over the area to be monitored.
  • FIG. 1 shows a cross section through a glass ceramic cooktop 11 and a radiant heater arranged below it.
  • the radiant heater contains a radiant heater 12.
  • the radiant heater 12 is arranged within a molded body 13, which represents a boundary to the outside and to the bottom.
  • An insulating layer 14 is attached below the molded body 13, the entire radiant heater being surrounded by a sheet metal plate 15.
  • a heat transfer element 16 in the form of a straight tube 17 runs transversely to the heating, see also FIG. 2.
  • the heat transfer element 16 is bent down slightly on the right-hand side in FIG. 1, so that its right end 18 passes through an opening in the sheet metal rim 19 can be put through.
  • the heat transfer element 16 is thermally connected to a bimetal temperature controller 21 via a type of cable lug 20.
  • FIG. 2 shows the position of the tube 17 of the heat transfer element and the bimetal temperature controller 21 in detail. It can be seen that the right end extends through the sheet metal rim 19, while the entire tube 17 of the heat transfer element 16 along a diameter over the Radiant heater 12 runs.
  • the bimetallic temperature controller 21 which can contain a bimetallic spring washer, not shown, is provided with two connecting lines 22, 23, one of which leads to a plug pin 24 of a connecting piece 25, while the other is connected to one end of the radiant heater 12. Since the tube 17 of the heat transfer element 16 is exposed to the heat of the glass ceramic cooktop 11 over practically its entire length, it takes on its temperature and dissipates it to both sides, the heat dissipated to the left being directly via the cable lug 20 is transmitted to the bimetal controller 21. Therefore, the temperature that the bimetal controller assumes is a measure of the temperature of the glass ceramic cooking surface 11, even if its temperature is significantly lower.
  • the arrangement of the bimetal controller 21 is shown in detail in FIG. 3.
  • the bimetal controller 21 has a housing in which a bimetal spring washer is arranged in a heat-conducting manner.
  • the housing 26 of the bimetal controller 21 has a screw 27 on its right side, onto which the lower leg 28 of the cable lug 20, which is provided with a hole, is attached and screwed tight with the aid of a nut 29. This creates a thermally good connection between the cable lug and the housing 26 of the temperature controller 21.
  • the upper leg 30 of the cable lug 20 is pressed tightly with the inner rod 31, so that a good heat-conducting connection is also established here.
  • FIG. 4 shows the cross section of an embodiment of a heat transfer element 16. It can be seen that it consists of an outer tube 17 with a triangular cross section, in the interior of which a good heat-conducting material is introduced, for example a copper rod 31.
  • the heat transfer element 16 becomes attached such that its upper flat side comes to rest directly on the underside of the glass ceramic cooking surface 11. Due to the relatively low height of the tube 17, the device also requires little space.
  • the wall thickness of the tube 17 can be, for example, about 0.3 mm.
  • the outer tube 17 and the copper rod 31 are brought into good heat-conducting connection by reducing, but preferably by prism-like pressing. During the pressing process, the cable lug 20 is pressed with the copper wire 31 at one end.
  • the cable lug 20, which like the copper rod 31 can consist of electrolytically pure copper, expediently has a temperature-resistant surface, for example a nickel plating.
  • the heat transfer element 16 is attached on the right-hand side by inserting it into the opening 18, while on the left-hand side a holding hammer 32, for example welded to the tube 17, is simply inserted over the edge 19 of the plate plate 15.
  • the heat transfer element 16 Because of the material used for the heat transfer element 16, it can even be bent slightly, so that other shapes could also be used.
  • the low cross-section of the tube 17, see FIG. 4, enables a very flat construction of the radiant heater, due to which one can either achieve lower plate temperatures at a given height or the overall height of the radiator can be made lower at previous plate temperatures.
  • the heat transfer element 16 is completely insensitive to shock and impact, so that it poses no problems in this respect during installation.
  • the arrangement of the heat transfer element directly on the underside of the glass ceramic surface has the advantage that the sensor senses influences, such as an offset pot, pot quality, idling, quantity, etc., and can react accordingly.
  • the control behavior is improved on this point.
  • the thermal design of the sensor is adjusted to the switching temperature standardized by the bimetal manufacturer by dimensioning the masses and surfaces of the outer jacket (preferably poor heat conductor) and the inner rod (preferably very good heat conductor).
  • the respective sensor rod can be matched to the heating in terms of its thermal data.
  • a stainless steel tube with the dimensions 0 2x0.16 mm is used as the outer jacket for the hotplate heating with a nominal diameter of 145 mm and a copper conductor 0 1.6 mm as the inner rod (hob 180 mm: 0 1.3 mm).
  • the increase in the mass of the outer jacket increases the dead time (transient response and control amplitude).
  • a change in the copper mass influences the switching temperature measured on the glass ceramic surface due to the change in the amount of heat that can be transported.
  • a further adjustment can be achieved via the position of the sensor and its shape (heat exposure). For example, the pot sensitivity when using a triangular cross section with a narrow side facing the plate is not as pronounced as with a wider side. An angle of 110 ° between the other sides is preferred.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Resistance Heating (AREA)
  • Electric Stoves And Ranges (AREA)
  • Resistance Heating (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Cable Accessories (AREA)
  • Control Of Temperature (AREA)
  • Control Of Combustion (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
EP83112652A 1982-12-18 1983-12-15 Temperaturregeleinrichtung für ein Wärmegerät Expired EP0114307B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83112652T ATE29820T1 (de) 1982-12-18 1983-12-15 Temperaturregeleinrichtung fuer ein waermegeraet.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823247028 DE3247028A1 (de) 1982-12-18 1982-12-18 Temperaturregeleinrichtung fuer ein waermegeraet
DE3247028 1982-12-18

Publications (2)

Publication Number Publication Date
EP0114307A1 EP0114307A1 (de) 1984-08-01
EP0114307B1 true EP0114307B1 (de) 1987-09-16

Family

ID=6181126

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83112652A Expired EP0114307B1 (de) 1982-12-18 1983-12-15 Temperaturregeleinrichtung für ein Wärmegerät

Country Status (5)

Country Link
EP (1) EP0114307B1 (es)
AT (1) ATE29820T1 (es)
DE (2) DE3247028A1 (es)
ES (1) ES528096A0 (es)
YU (1) YU45166B (es)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3622415A1 (de) 1986-07-03 1988-01-07 Ego Elektro Blanc & Fischer Strahlheizkoerper
DE8711209U1 (de) * 1987-08-18 1987-10-01 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen Elektrischer Heizkörper
GB8811440D0 (en) * 1988-05-13 1988-06-15 Redring Electric Ltd Thermal control device
GB8828822D0 (en) * 1988-12-09 1989-01-18 Redring Electric Ltd Control means for electric heater unit
DE4022292A1 (de) * 1990-07-15 1992-01-16 Ego Elektro Blanc & Fischer Elektrisches strahlungsheizelement
DE19638517A1 (de) * 1996-09-20 1998-03-26 Ako Werke Gmbh & Co Strahlungsheizkörper für eine Kochstelle
GB0301167D0 (en) * 2003-01-18 2003-02-19 Ceramaspeed Ltd Temperature-limiting device
CN105252685A (zh) * 2015-11-14 2016-01-20 际华三五一五皮革皮鞋有限公司 一种铁脚后跟加热模具

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1318401A (en) * 1919-10-14 Thermostat
US2148407A (en) * 1937-07-06 1939-02-21 Standard Electric Mfg Corp Surface burner control
US2978564A (en) * 1958-12-31 1961-04-04 Corning Glass Works Electric hot plate
DE1133584B (de) * 1961-03-18 1962-07-19 Busch Jaeger Duerener Metall Temperaturregler oder -melder
DE1301404C2 (de) * 1967-01-05 1974-06-06 Gustav Dipl Ing Massekochplatte mit einem Temperaturregler
US3622754A (en) * 1970-07-24 1971-11-23 Gen Electric Glass plate surface heating unit with even temperature distribution
DE2045001A1 (de) * 1970-09-11 1972-03-16 Rommelsbacher H Kochplatte mit einem thermostatischen Temperaturregler
US3710076A (en) * 1972-02-17 1973-01-09 J Frazier Radiant surface-heater and temperature sensing assembly
DE2546274A1 (de) * 1975-10-16 1977-04-21 Inter Control Koehler Hermann Temperaturregler-sicherheitsthermostat-kombination
DE2627373B2 (de) * 1976-06-18 1978-10-12 E.G.O. Elektro-Geraete Blanc U. Fischer, 7519 Oberderdingen Signaleinrichtung an Kochgeräten mit einer Glaskeramikkochfläche
DE2839161A1 (de) * 1978-09-08 1980-03-20 Ego Regeltech Temperaturbegrenzer fuer eine glaskeramik-kocheinheit
DE2943922A1 (de) * 1979-10-31 1981-05-14 Ego Elektro Blanc & Fischer Temperaturmelder zur anzeige des temperaturzustandes einer glaskeramik-kochflaeche
FR2476308A1 (fr) * 1980-01-14 1981-08-21 Johnson Matthey Co Ltd Plaque en vitre ceramique comprenant un dispositif de mesure de la temperature
DE3100758A1 (de) * 1981-01-13 1982-09-02 Ako Werke Gmbh & Co Schalteinrichtung
DE3108025A1 (de) * 1981-03-03 1982-09-16 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen Elektro-heizeinheit zur beheizung einer platte

Also Published As

Publication number Publication date
YU45166B (en) 1992-03-10
DE3373771D1 (en) 1987-10-22
ES8406832A1 (es) 1984-08-01
YU244283A (en) 1985-12-31
EP0114307A1 (de) 1984-08-01
DE3247028A1 (de) 1984-06-20
ES528096A0 (es) 1984-08-01
ATE29820T1 (de) 1987-10-15

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