EP0235680A2 - Electrical cooking plate - Google Patents

Electrical cooking plate Download PDF

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Publication number
EP0235680A2
EP0235680A2 EP87102332A EP87102332A EP0235680A2 EP 0235680 A2 EP0235680 A2 EP 0235680A2 EP 87102332 A EP87102332 A EP 87102332A EP 87102332 A EP87102332 A EP 87102332A EP 0235680 A2 EP0235680 A2 EP 0235680A2
Authority
EP
European Patent Office
Prior art keywords
housing
hotplate
underside
temperature sensor
temperature limiter
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
Application number
EP87102332A
Other languages
German (de)
French (fr)
Other versions
EP0235680B1 (en
EP0235680A3 (en
Inventor
Robert Kicherer
Felix Schreder
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 AT87102332T priority Critical patent/ATE76242T1/en
Publication of EP0235680A2 publication Critical patent/EP0235680A2/en
Publication of EP0235680A3 publication Critical patent/EP0235680A3/en
Application granted granted Critical
Publication of EP0235680B1 publication Critical patent/EP0235680B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H05B1/0216—Switches actuated by the expansion of a solid element, e.g. wire or rod
    • 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
    • H05B3/70—Plates of cast metal

Definitions

  • the invention relates to an electric hotplate with a hotplate body which is provided on its underside facing away from the cooking surface with at least one heating resistor embedded in an insulating compound and with a temperature limiter which has a housing in the central zone of the hotplate body with a switch and an actuator acting thereon. Has rod-shaped temperature sensors protruding above the housing in the area of the heating resistor.
  • the housing of the temperature sensor of such electric hot plates provided as a base for the switch parts consists of an electrically insulating material which, due to the very high temperature loads, must also be of very high quality and is usually a ceramic material. This material is problematic in terms of shape and also expensive.
  • the housing of the temperature limiter is essentially closed except for the passage of the temperature sensor and of connecting lugs, with the mounting side of the housing usually being closed a flat cover which is fastened, for example, by a rivet.
  • this design of the temperature limiter is too expensive and the ventilation of the housing is too low. If the housing cover lies on the underside of the housing, it can fall down onto a cover on the underside of the hotplate body if it is damaged and interfere there.
  • the invention has for its object to provide an electric hotplate of the type mentioned, which ensures an improved and simplified manufacture of the temperature limiter.
  • the housing of the temperature limiter is open at the top and that this open side lies at a distance below the bottom of the hotplate body.
  • the housing of the temperature limiter therefore does not require a cover, so that it can be manufactured continuously and completely in one piece. Since its open side is at a distance from the hotplate body, it is well ventilated and no moisture can accumulate in the housing.
  • the housing can be made more compact by this design, so that it takes up less space.
  • the housing has protruding spacers, in particular frustoconical projections, with which it rests on the underside of the hotplate body.
  • the relatively long temperature sensor can also be aligned in a surprisingly simple manner the hotplate body can be achieved.
  • the exposed area of the housing can thereby be kept relatively large.
  • the underside of the hotplate body in cross-section in the area of the housing of the temperature limiter in particular from a downwardly projecting central pin to a downwardly projecting inner flange ring which limits the area of the heating resistor on the inner circumference, increases radially outwards, in which case at least one spacer closer to the temperature sensor is advantageously higher than at least one spacer further away from it, so that despite increasing contact surface of the hotplate body, an alignment of the housing or the temperature sensor parallel to its cooking surface is particularly easy is possible.
  • a particularly safe and wobble-free contact of the housing of the temperature limiter on the hotplate body can be achieved if at least three spacers are provided in a further embodiment of the invention, two of which are preferably located on either side of the inner end of the temperature sensor and one approximately in the extension of the temperature sensor.
  • the last-mentioned spacer ensures an exact alignment of the temperature sensor expediently protruding radially outwards with respect to the central axis of the hotplate body, which extends approximately over the entire annular zone, in which heating resistors are provided, for example, in grooves surrounding the central axis of the hotplate body and the lies between the inner flange ring and an outer flange ring of the hotplate body which projects further downward.
  • the housing of the temperature limiter preferably with rounded corner areas, resting against the inner circumference of the inner flange ring of the hotplate body.
  • the housing of the temperature limiter is also precisely fixed against radial movements relative to the hotplate body.
  • the associated spacers can also be located in these corner areas.
  • the housing of the temperature limiter receives a special, precisely defined system on the inner flange ring if the radius of curvature of the respective rounded corner area of the housing is less than half of its width measured in the longitudinal direction of the temperature sensor.
  • the open side of the housing of the temperature limiter is formed by a flat side of the housing and preferably forms its mounting opening for the switch used by this side, in particular a snap switch.
  • the open side also forms the mounting opening for the temperature sensor, so that all functional or working parts of the temperature limiter can be installed by simply plugging in from this open side.
  • the arrangement can be such that the assembled parts are secured essentially only by their internal stress and by the contact of the movable part of the temperature sensor on the snap switch with respect to the housing.
  • the design according to the invention is particularly suitable for those temperature limiters in which the temperature sensor is formed by an outer tube provided as an expansion tube and an inner rod arranged therein with a different, in particular very low, expansion coefficient.
  • the outer tube can be very securely on the Ge housing if a flange plate is fastened to its inner end with a molded sleeve, which preferably surrounds the inner end of the outer tube between an end collar and an upset flange ring.
  • thermocoupling of the temperature limiter to the hotplate can also be improved by the design according to the invention.
  • the temperature limiter is resiliently pressed against the underside of the hotplate body, a lower cover of the hotplate body preferably being a spring member which rests on the underside of the housing of the temperature limiter, such as a shaped spring clip or the like. having.
  • an electric hotplate 1 has a hotplate body 2 made of cast material, in particular circular, the flat top surface of which is provided with a recess 6 in the center forms the cooking surface 3 of the electric hotplate 1 and which is adjacent on its underside an outer flange ring 4 which extends approximately up to the cooking surface 3 has an outer flange ring 4 and, in the vicinity of the recess 6, has an inner flange ring 5 which projects less far downward.
  • heating resistors 9 are provided on the underside of the hotplate body, which are arranged in grooves which are curved spirally about the central axis 8 and are separated from one another by correspondingly spiraling webs and are embedded in an insulating compound.
  • the inner one The flange ring protrudes slightly downwards from the underside of the vertical webs and thus the insulating compound.
  • the underside of the hotplate body 3 is or the like with a cover 11 in the form of a flat metal cover. essentially closed, this cover 11 abutting the lower end face of the flange ring 4 and the underside of a central pin 12.
  • the central pin 12 provided in the central axis 8 delimits with the inner flange ring 5 an annular space provided within the heating resistors 9 on the underside of the hotplate body 2 and projects further downward from the flange ring, namely preferably as far as the outer flange ring 4.
  • the center pin 12 is provided with a threaded bore, with which the electric hotplate is fixed in the hob and the cover 11 can be stretched against the underside of the hotplate body 2.
  • Said annular space is delimited on the upper side by the approximately constant thickness of the bottom wall of the recess 6, which on the underside has a concave fillet that adjoins the circumferential surface of the central pin 12 and rises radially outwards at a few degrees, for example approximately 10 °, forms annular surface 13 which merges into the inner circumferential surface of the flange ring 5 via a corresponding concave fillet.
  • a temperature limiter 14 which has a housing 15 made of steatite in the said annular space and a rod which projects freely outwards and radially to the central axis 8 Migen temperature sensor 16, which lies at a short distance below the spiral webs of the hotplate body or the insulating material receiving the heating resistors 9 and has a constant distance from them over its length.
  • the temperature sensor 16 extends almost to the inner circumference of the outer flange ring 4 and can be arranged in a contactless manner with respect to the inner flange ring 5.
  • the lengthwise rectangular case 15, which is flatter in side view compared to its width, lies approximately tangentially to the central pin 12 with its elongation, its upper side 17 parallel to the cooking surface 3 or to the temperature sensor 16 being a short distance below the surface 13 of the hotplate body 2 lies that between this side 17 and the surface 13 a gap widening in cross section to the flange ring 5 is formed.
  • the housing 15 has on its top in one piece with it, upwardly frustoconical protruding spacers 18, 19, which project to different extents from the upper side 17 and rest with their upper end faces on the surface 13 of the hotplate body 2.
  • the arrangement is expediently such that the housing 15 with its associated corner regions rests on the inner circumference 21 of the inner flange ring 5 on both sides of the temperature sensor 16.
  • these corner regions 20 are rounded with a quarter circle in the form of a radius of curvature which is smaller than half of the edge dimension of the housing 15 measured in the longitudinal direction of the temperature sensor 16.
  • the housing 15 On its side facing away from the temperature sensor 16, that is to say on the side facing the central pin 12, the housing 15 has the electrical connections for the temperature limiter 14 in the form of connecting lugs 22 which protrude beyond the associated side of the housing 15 and, for example, on both sides of the temperature sensor 16 placed axial plane the hotplate body 2 lie.
  • a spring member 23 which can be formed, for example, by a design which is formed in one piece with the cover 11 and projects upwards therefrom and the housing 15 against the surface 13 of the hotplate body 2 presses.
  • the housing 15 of the temperature limiter 14 is provided with a recess 24, which is essentially limited on all sides, for the completely recessed mounting of the switch parts of a snap switch 25, the shape of which is exclusively on the upper side 17 on it full remaining width open recess 24 is adapted.
  • the switch 25 has a snap contact 26 carried by a snap spring 27, to which a contact fixed to the housing is assigned as the mating contact 28.
  • the inner end of an inner rod 29 of the essentially cylindrical rod-shaped temperature sensor 16 acts on a pressure point of the snap spring 27.
  • the cylindrical inner rod 29 is arranged with little radial play in an outer tube 30 provided as an expansion tube of relatively high expansion coefficient, the inner end of which is fixed in position on the housing 15 is attached and the free end of which carries an adjusting member 31 in the form of an adjusting screw on which the associated outer end of the inner rod 29 is supported.
  • the inner end of the inner rod 29 projects from the inner end of the outer tube 30 and lies in a groove extending to the recess 24 in the upper side 17 of the housing 15.
  • the connecting lug 22 associated with the snap contact 26 is formed by a leg of a contact carrier, which in slot-shaped depressions of the housing 15 is inserted from its upper side 17.
  • the mating contact 28 with its multi-angled connecting lug 22 is inserted into a slot-shaped opening 15 from the upper side 17.
  • the outer tube 30 of the temperature sensor 16 has at the inner end an elongated rectangular flange plate 33 projecting on all sides over its outer circumference, which is penetrated by the outer tube 30 such that the outer tube 30 on the associated side of the flange plate 33 with one formed by its end , Outwardly shaped annular collar 34 abuts and is attached.
  • the flange plate 33 which can be curved in one or two planes in the relaxed state, engages with its longer ends in slots 35 of the housing 15, which connect on both sides to the side surfaces of the groove 32. In these slots 35, the flange plate 33 is secured by its resilient internal stress. Adjacent to the slots 35, the outer tube 33 of the temperature sensor 16 lies essentially without contact in the groove 32, in such a way that it projects freely over the associated longitudinal side of the housing 15 connecting the rounded corner regions 20.
  • Two spacers 18 of larger diameter and of substantially the same size are provided on either side of the temperature sensor 16 in the vicinity or in the area of a corner region 20, a spacer 18 directly adjoining the associated corner region 20 reaching approximately to the adjacent slot 35, while that another spacer 18 lies essentially between the adjacent slot 35 and the adjacent corner region 20.
  • the upper end faces of these two spacers 18 lie in a common plane perpendicular to the temperature sensor 16.
  • the third spacer 19, which is substantially smaller in diameter, lies essentially in an axial plane of the temperature sensor 16 and with respect to the spacers 18 on the other side of the recess 24 between the connecting lugs 22, such that this spacer is also outside the recess 24 or directly is provided adjacent to this.
  • the flange plate 33a has a tubular sleeve 36 formed in one piece with it, the length of which is only about half the diameter and which closely surrounds the inner end of the outer tube 30a.
  • the outer tube 30a With a distance from the end collar 34a adapted to the length of the sleeve 36, the outer tube 30a has an annular collar projecting over its outer circumference approximately by the wall thickness of the sleeve 36 and formed in one piece with it, which is formed by an upset flange ring 37, in the area of which the Wall of the outer tube 30a in the manner of a fold is U-shaped twice on top of each other.
  • the flange plate 33a is curved about an axis lying transversely to its longitudinal direction in such a way that it lies directly adjacent to the sleeve 36 on the boundary edges adjoining the groove 32a of the side surfaces of the slots 35a closer to the outer end of the temperature sensor 16a.
  • the flange plate is at least in the region of its ends at a right angle or parallel to it. Axis lying in the longitudinal direction is curved in such a way that it only rests on the opposite sides of the slots 35a with its corner regions.
  • FIGS. 5 and 6 the same reference numerals are used for corresponding parts as in FIGS. 1 and 2, but with the index "b".
  • temperature limiter 14b in particular its switch housing which bears against the underside of hotplate body 2b with spacers 18b, 19b, is exposed to very good ventilation, so that heat build-up in the area of the switch housing is completely avoided can, while the temperature sensor 16b is arranged well covered between the cover 11b and the underside of the hotplate body 2b.
  • the cover 11b has in the center an opening 39, approximately circular in the embodiment shown, in the form of an opening, from the edge region of which a tongue-shaped spring element 23b, which is approximately radial to the central pin 12b and protrudes in one piece with the cover 11b, projects.
  • This spring member 23b only extends to the central pin 12b, rests on the underside thereof, is penetrated by the threaded bolt 38 inserted in the central pin 12b and is tensioned against the underside of the central pin by a nut screwed onto the threaded bolt 38.
  • the spring member 23b lying essentially parallel to the underside of the switch housing of the temperature limiter 14b at a short distance from this underside approximately in the plane of the lower end face of the outer flange ring 4b passes at its radially outer end via an approximately right-angled offset into the delimitation of the opening 39, this offset being located immediately adjacent to the side of the switch housing from which the temperature sensor 16b protrudes outwards.
  • the width of the spring member 23b is substantially smaller than the longitudinal extent of the housing 15b of the temperature limiter 14b measured parallel thereto, the spring member 23b lying approximately in the middle of this longitudinal extent.
  • the cover 11b forms an approximately closed annular groove around the central axis 8b by channel-shaped embossing, the bottom wall of this annular groove being supported on the lower end face of the inner flange ring 5b.
  • a radial slot 42 is provided, the width and depth of which are in each case the same or only slightly greater than the diameter of the temperature sensor 16b, so that the relatively short section directly adjoining the housing 15b laterally and in the Height center can engage in this slot 42.
  • the housing 15b of the temperature limiter 14b is covered exclusively by the spring member 23b, while it is completely exposed on both sides of this spring member 23b and extends approximately to the limit of the opening 39.
  • the cover 11b is additionally fixed with respect to the hotplate body 2b, except in the area of the central pin 12b.
  • two screws 40 diametrically opposite each other on both sides of the spring member 23b are provided directly adjacent to the delimitation of the opening 39, which are screwed from below into corresponding threaded bores of eye-like widenings of the inner flange ring 5b.
  • the tab-shaped spring member 23b carries between its ends an upwardly projecting cam 41 in the form of an expression which essentially forms the only contact of the spring member 23b on the underside of the housing 15b of the temperature limiter 14b.
  • the cam 41 is expediently arranged in the region of a switch button of the temperature limiter 14b, so that it presses against it and fixes it under resilient pretension. The As a result, the temperature limiter is pressed securely onto the hotplate body 2b with reproducible heat coupling, and assembly is simple.

Landscapes

  • Baking, Grill, Roasting (AREA)
  • Cookers (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Electric Stoves And Ranges (AREA)
  • Control Of Resistance Heating (AREA)
  • General Induction Heating (AREA)
  • Massaging Devices (AREA)
  • Resistance Heating (AREA)
  • Thermally Actuated Switches (AREA)
  • Table Devices Or Equipment (AREA)
  • Insulated Conductors (AREA)
  • Organic Insulating Materials (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)

Abstract

In an electric hotplate (1), the casing (15) of a thermal cutout (14) integrated with a projecting expansion rod temperature sensor (16) is open or unclosed on the top side, so that its reception depth for receiving the associated limiter switch is open upwards towards the underside of the hotplate body (2). On either side of the opening of casing (15) located in said top side (17), the casing is provided with spacers (18, 19) in one piece therewith and projecting upwards to different heights for engaging on the associated sloping surface (13) of the underside of hotplate body (2). Thus, in the case of simple manufacture, a good ventilation of casing (15) is obtained.

Description

Die Erfindung betrifft eine Elektrokochplatte mit einem Kochplattenkörper, der an seiner von der Kochfläche abge­kehrten Unterseite mit mindestens einem in eine Isoliermas­se eingebetteten Heizwiderstand und mit einem Temperaturbe­grenzer versehen ist, der ein in der Mittelzone des Koch­plattenkörpers liegendes Gehäuse mit einem Schalter und einen auf diesen wirkenden, stabförmig über das Gehäuse in den Bereich des Heizwiderstandes vorstehenden Temperatur­fühler aufweist.The invention relates to an electric hotplate with a hotplate body which is provided on its underside facing away from the cooking surface with at least one heating resistor embedded in an insulating compound and with a temperature limiter which has a housing in the central zone of the hotplate body with a switch and an actuator acting thereon. Has rod-shaped temperature sensors protruding above the housing in the area of the heating resistor.

Das als Sockel für die Schalterteile vorgesehene Gehäuse des Temperaturfühlers solcher Elektrokochplatten besteht aus elektrisch-isolierendem Werkstoff, der infolge der sehr hohen Temperaturbelastungen auch sehr hochwertig sein muß und meist ein Keramikwerkstoff ist. Dieser Werkstoff ist hinsichtlich der Formgebung problematisch und außerdem teuer. Bei bekannten Elektrokochplatten ist das Gehäuse des Temperaturbegrenzers im wesentlichen außer für den Durch­tritt des Temperaturfühlers und von Anschlußfahnen ge­schlossen, wobei meist die Montageseite des Gehäuses mit einem flachen und beispielsweise durch einen Niet befestig­ten Deckel abgedeckt ist. Dadurch sind die stromführenden Schalterteile sicher abgedeckt und es werden für viele An­wendungsfälle vorteilhafte Wirkungen erzielt. In anderen Anwendungsfällen jedoch ist diese Ausbildung des Tempera­turbegrenzers zu teuer und die Durchlüftung des Gehäuses zu gering. Liegt der Gehäusedeckel an der Unterseite des Ge­häuses, so kann dieser bei einer Beschädigung nach unten auf eine Abdeckung an der Unterseite des Kochplattenkörpers fallen und dort stören.The housing of the temperature sensor of such electric hot plates provided as a base for the switch parts consists of an electrically insulating material which, due to the very high temperature loads, must also be of very high quality and is usually a ceramic material. This material is problematic in terms of shape and also expensive. In known electric hotplates, the housing of the temperature limiter is essentially closed except for the passage of the temperature sensor and of connecting lugs, with the mounting side of the housing usually being closed a flat cover which is fastened, for example, by a rivet. As a result, the current-carrying switch parts are safely covered and advantageous effects are achieved for many applications. In other applications, however, this design of the temperature limiter is too expensive and the ventilation of the housing is too low. If the housing cover lies on the underside of the housing, it can fall down onto a cover on the underside of the hotplate body if it is damaged and interfere there.

Der Erfindung liegt die Aufgabe zugrunde, eine Elektrokoch­platte der genannten Art zu schaffen, die eine verbesserte und vereinfachte Herstellung des Temperaturbegrenzers ge­währleistet.The invention has for its object to provide an electric hotplate of the type mentioned, which ensures an improved and simplified manufacture of the temperature limiter.

Zur Lösung dieser Aufgabe ist gemäß der Erfindung vorgese­hen, daß das Gehäuse des Temperaturbegrenzers an seiner Oberseite offen ist und daß diese offene Seite mit Abstand unterhalb der Unterseite des Kochplattenkörpers liegt. Das Gehäuse des Temperaturbegrenzers bedarf also keines Deckels, so daß es durchgehend und vollständig einteilig hergestellt werden kann. Da seine offene Seite im Abstand vom Kochplattenkörper vorgesehen ist, ist es gut durchlüf­tet und es kann sich im Gehäuse keine Feuchtigkeit ansam­meln. Darüber hinaus kann das Gehäuse durch diese Ausbil­dung kompakter hergestellt werden, so daß es weniger Raum beansprucht.To achieve this object it is provided according to the invention that the housing of the temperature limiter is open at the top and that this open side lies at a distance below the bottom of the hotplate body. The housing of the temperature limiter therefore does not require a cover, so that it can be manufactured continuously and completely in one piece. Since its open side is at a distance from the hotplate body, it is well ventilated and no moisture can accumulate in the housing. In addition, the housing can be made more compact by this design, so that it takes up less space.

Zur Erzielung einer möglichst genau definierten Anlage des Gehäuses am Kochplattenkörper weist das Gehäuse über seine Oberseite vorstehende Distanzglieder, insbesondere kegel­stumpfförmige Vorsprünge auf, mit welchen es an der Unter­seite des Kochplattenkörpers anliegt. Dadurch kann auf überraschend einfache Weise auch eine sehr exakte Ausrich­tung des verhältnismäßig langen Temperaturfühlers gegenüber dem Kochplattenkörper erzielt werden. Außerdem kann dadurch der offenliegende Bereich des Gehäuses verhältnismäßig groß gehalten werden.In order to achieve the most precisely defined possible contact of the housing on the hotplate body, the housing has protruding spacers, in particular frustoconical projections, with which it rests on the underside of the hotplate body. As a result, the relatively long temperature sensor can also be aligned in a surprisingly simple manner the hotplate body can be achieved. In addition, the exposed area of the housing can thereby be kept relatively large.

Für die an die Kochplatte zu stellenden thermischen Forde­rungen ist es zweckmäßig, wenn die Unterseite des Kochplat­tenkörpers im Querschnitt im Bereich des Gehäuses des Tem­peraturbegrenzers, insbesondere von einem nach unten vor­stehenden Mittelzapfen zu einem nach unten vorstehenden, den Bereich des Heizwiderstandes am Innenumfang begrenzen­den inneren Flanschring, radial nach außen ansteigt, wobei in diesem Fall vorteilhaft mindestens ein näher beim Tempe­raturfühler liegendes Distanzglied höher als wenigstens ein weiter davon entfernt liegendes Distanzglied ist, so daß trotz ansteigender Anlagefläche des Kochplattenkörpers eine zu dessen Kochfläche parallele Ausrichtung des Gehäuses bzw. des Temperaturfühlers ohne besonderen Aufwand möglich ist.For the thermal requirements to be placed on the hotplate, it is expedient if the underside of the hotplate body in cross-section in the area of the housing of the temperature limiter, in particular from a downwardly projecting central pin to a downwardly projecting inner flange ring which limits the area of the heating resistor on the inner circumference, increases radially outwards, in which case at least one spacer closer to the temperature sensor is advantageously higher than at least one spacer further away from it, so that despite increasing contact surface of the hotplate body, an alignment of the housing or the temperature sensor parallel to its cooking surface is particularly easy is possible.

Eine besonders sichere und wackelfreie Anlage des Gehäuses des Temperaturbegrenzers am Kochplattenkörper ist zu errei­chen, wenn in weiterer Ausgestaltung der Erfindung minde­stens drei Distanzglieder vorgesehen sind, von denen vor zugsweise zwei beiderseits des inneren Endes des Tempera­turfühlers und eines etwa in Verlängerung des Temperatur­fühlers liegen. Insbesondere das zuletzt genannte Distanz­glied sorgt dabei für eine exakte Ausrichtung des gegenüber der Mittelachse des Kochplattenkörpers zweckmäßig radial nach außen frei vorstehenden Temperaturfühlers, der annä­hernd über die gesamte ringförmige Zone reicht, in welcher Heizwiderstände beispielsweise in spiralförmig die Mittel­achse des Kochplattenkörpers umgebende Nuten vorgesehen sind und die zwischen dem inneren Flanschring und einem äußeren, weiter nach unten vorstehenden Flanschring des Kochplattenkörpers liegt.A particularly safe and wobble-free contact of the housing of the temperature limiter on the hotplate body can be achieved if at least three spacers are provided in a further embodiment of the invention, two of which are preferably located on either side of the inner end of the temperature sensor and one approximately in the extension of the temperature sensor. In particular, the last-mentioned spacer ensures an exact alignment of the temperature sensor expediently protruding radially outwards with respect to the central axis of the hotplate body, which extends approximately over the entire annular zone, in which heating resistors are provided, for example, in grooves surrounding the central axis of the hotplate body and the lies between the inner flange ring and an outer flange ring of the hotplate body which projects further downward.

Eine noch wesentlich genauere und stabilere Ausrichtung des Temperaturbegrenzers kann dadurch erreicht werden, daß das Gehäuse des Temperaturbegrenzers, vorzugsweise mit abgerun­deten Eckbereichen, am Innenumfang des inneren Flanschrin­ges des Kochplattenkörpers anliegt. Dadurch ist das Gehäuse des Temperaturbegrenzers auch gegen Radialbewegungen gegen­über dem Kochplattenkörper genau festgelegt. In diesen Eck­bereichen können auch die zugehörigen Distanzglieder lie­gen. Das Gehäuse des Temperaturbegrenzers erhält am inneren Flanschring eine besondere genau definierte Anlage, wenn der Krümmunsgradius des jeweiligen abgerundeten Eckberei­ches des Gehäuses kleiner als die Hälfte von dessen in Längsrichtung des Temperaturfühlers gemessener Breite ist.An even more precise and stable alignment of the temperature limiter can be achieved by the housing of the temperature limiter, preferably with rounded corner areas, resting against the inner circumference of the inner flange ring of the hotplate body. As a result, the housing of the temperature limiter is also precisely fixed against radial movements relative to the hotplate body. The associated spacers can also be located in these corner areas. The housing of the temperature limiter receives a special, precisely defined system on the inner flange ring if the radius of curvature of the respective rounded corner area of the housing is less than half of its width measured in the longitudinal direction of the temperature sensor.

Eine besonders vorteilhafte Weiterbildung des Erfindungsge­genstandes besteht darin, daß die offene Seite des Gehäuses des Temperaturbegrenzers durch eine Flachseite des Gehäuses gebildet ist und vorzugsweise dessen Montageöffnung für den von dieser Seite eingesetzten Schalter, insbesondere einen Schnappschalter, bildet. Statt dessen, insbesondere aber zusätzlich hierzu bildet die offene Seite auch die Montage­öffnung für den Temperaturfühler, so daß alle Funktions- bzw. Arbeitsteile des Temperaturbegrenzers durch einfaches Einstecken von dieser offenen Seite her montiert werden können. Die Anordnung kann dabei so getroffen sein, daß die montierten Teile im wesentlichen nur durch ihre Eigenspan­nung sowie durch die Anlage des beweglichen Teiles des Tem­peraturfühlers am Schnappschalter gegenüber dem Gehäuse gesichert sind.A particularly advantageous development of the subject matter of the invention is that the open side of the housing of the temperature limiter is formed by a flat side of the housing and preferably forms its mounting opening for the switch used by this side, in particular a snap switch. Instead of this, but especially in addition to this, the open side also forms the mounting opening for the temperature sensor, so that all functional or working parts of the temperature limiter can be installed by simply plugging in from this open side. The arrangement can be such that the assembled parts are secured essentially only by their internal stress and by the contact of the movable part of the temperature sensor on the snap switch with respect to the housing.

Die erfindungsgemäße Ausbildung eignet sich insbesondere für solche Temperaturbegrenzer, bei welchen der Temperatur­fühler durch ein als Dehnrohr vorgesehenes Außenrohr und einen in diesem angeordneten Innenstab mit abweichendem, insbesondere sehr geringem Ausdehnungskoeffizienten gebil­det ist. Das Außenrohr läßt sich dabei sehr sicher am Ge­ häuse haltern, wenn an seinem inneren Ende eine Flansch­platte mit einer angeformten Muffe befestigt ist, die vor­zugsweise das innere Ende des Außenrohres zwischen einem Endkragen und einem angestauchten Bördelring umgibt. Es ist auch denkbar, mindestens zwei gesonderte Temperaturfühler vorzusehen, die beispielsweise gleichmäßig um die Mittel­achse des Kochplattenkörpers verteilt sind bzw. in entge­gengesetzten Richtungen frei ausragen und auf gesonderte Schalter einwirken, wobei diese Schalter in gesonderten Gehäusen oder bevorzugt in einem gemeinsamen, vom Mittel­zapfren des Kochplattenkörpers durchsetzten Gehäuse angeord­net und auch auf unterschiedliche Schalttemperaturen ju­stiert sein können. Die thermische Ankopplung des Tempera­turbegrenzers an die Kochplatte kann durch die erfindungs­gamäße Ausbildung ebenfalls verbessert werden.The design according to the invention is particularly suitable for those temperature limiters in which the temperature sensor is formed by an outer tube provided as an expansion tube and an inner rod arranged therein with a different, in particular very low, expansion coefficient. The outer tube can be very securely on the Ge housing if a flange plate is fastened to its inner end with a molded sleeve, which preferably surrounds the inner end of the outer tube between an end collar and an upset flange ring. It is also conceivable to provide at least two separate temperature sensors which, for example, are evenly distributed around the central axis of the hotplate body or protrude freely in opposite directions and act on separate switches, these switches in separate housings or preferably in a common one, from the center pin of the hotplate body arranged housing and can also be adjusted to different switching temperatures. The thermal coupling of the temperature limiter to the hotplate can also be improved by the design according to the invention.

Zur weiteren Vereinfachung der Montage des Temperaturbe­grenzers sowie für dessen sicheren Halt ist der Temperatur­begrenzer federnd gegen die Unterseite des Kochplattenkör­pers gedrückt, wobei vorzugsweise eine untere Abdeckung des Kochplattenkörpers ein an der Unterseite des Gehäuses des Temperaturbegrenzers anliegendes Federglied, wie eine aus­geformte Federlasche o.dgl. aufweist.To further simplify the assembly of the temperature limiter and for its secure hold, the temperature limiter is resiliently pressed against the underside of the hotplate body, a lower cover of the hotplate body preferably being a spring member which rests on the underside of the housing of the temperature limiter, such as a shaped spring clip or the like. having.

Diese und weitere Merkmale von bevorzugten Weiterbildungen der Erfindung gehen auch aus der Beschreibung und den Zeichnungen hervor, wobei die einzelnen Merkmale jeweils für sich allein oder zu mehreren in Form von Unterkombin­tionen bei einer Ausführungsform der Erfindung und auf an­deren Gebieten verwirklicht sein können. Ausführungsbei­spiele der Erfindung sind in den Zeichnungen dargestellt und werden im folgenden näher erläutert. In den Zeichnungen zeigen:

  • Fig. 1 eine erfindungsgemäße Elektrokochplatte im Querschnitt,
  • Fig. 2 einen Ausschnitt der Fig. 1 in Ansicht von unten,
  • Fig. 3 den Temperaturbegrenzer der Elektrokochplatte gemäß den Fig. 1 und 2 in Draufsicht,
  • Fig. 4 eine weitere Ausführungsform eines Tempera­turfühlers im Axialschnitt,
  • Fig. 5 ein weiteres Ausführungsbeispiel einer Elektrokochplatte in Ansicht von unten,
  • Fig. 6 die Elektrokochplatte gemäß Fig. 5 in teilweise geschnittener Seitenansicht, jedoch ohne Heizwiderstände.
These and further features of preferred developments of the invention also emerge from the description and the drawings, the individual features being able to be implemented individually or in groups in the form of sub-combinations in one embodiment of the invention and in other fields. Embodiments of the invention are shown in the drawings and are explained in more detail below. The drawings show:
  • 1 is an electric hot plate according to the invention in cross section,
  • 2 shows a detail of FIG. 1 in a view from below,
  • 3 shows the temperature limiter of the electric hotplate according to FIGS. 1 and 2 in plan view,
  • 4 shows a further embodiment of a temperature sensor in axial section,
  • 5 shows another embodiment of an electric hotplate in a view from below,
  • Fig. 6, the electric hot plate according to FIG. 5 in a partially sectioned side view, but without heating resistors.

Wie die Fig. 1 und 2 zeigen, weist eine erfindungsgemäße Elektrokochplatte 1 einen aus Gußwerkstoff bestehenden, insbesondere kreisrunden Kochplattenkörper 2 auf, dessen ebene, im Zentrum mit einer Vertiefung 6 versehene Obersei­te die Kochfläche 3 der Elektrokochplatte 1 bildet und der an seiner Unterseite benachbart zu einem annähernd bis an die Kochfläche 3 reichenden Umfangsbund 7 einen äußeren Flanschring 4 sowie in Nähe der Vertiefung 6 einen demge­genüber weniger weit nach unten vorstehenden inneren Flanschring 5 aufweist. Zwischen den beiden zur Mittel­achse 8 der Elektrokochplatte 1 konzentrischen Flanschrin­gen 4, 5 sind an der Unterseite des Kochplattenkörpers Heizwiderstände 9 vorgesehen, die in spiralig um die Mit­telachse 8 gekrümmten und durch entsprechend spiralig ver­laufende Stege voneinander getrennten Nuten angeordnet so­wie in eine Isoliermasse eingebettet sind. Der innere Flanschring steht über die Unterseite der sprialigen Stege und damit der Isoliermasse geringfügig nach unten vor. An der Unterseite des Umfangsbundes 7 ist ein am Außenumfang des Flanschringes 4 anliegender Tragring 10 zur Abstützung der Elektrokochplatte 1 auf dem Rand einer Montageöffnung einer Herdmulde o.dgl. vorgesehen. Die Unterseite des Koch­plattenkörpers 3 ist mit einer Abdeckung 11 in Form eines flachen Blechdeckels o.dgl. im wesentlichen verschlossen, wobei diese Abdeckung 11 an der unteren Stirnfläche des Flanschringes 4 sowie an der Unterseite eines Mittelzapfens 12 anliegt.As shown in FIGS. 1 and 2, an electric hotplate 1 according to the invention has a hotplate body 2 made of cast material, in particular circular, the flat top surface of which is provided with a recess 6 in the center forms the cooking surface 3 of the electric hotplate 1 and which is adjacent on its underside an outer flange ring 4 which extends approximately up to the cooking surface 3 has an outer flange ring 4 and, in the vicinity of the recess 6, has an inner flange ring 5 which projects less far downward. Between the two flange rings 4, 5 concentric with the central axis 8 of the electric hotplate 1, heating resistors 9 are provided on the underside of the hotplate body, which are arranged in grooves which are curved spirally about the central axis 8 and are separated from one another by correspondingly spiraling webs and are embedded in an insulating compound. The inner one The flange ring protrudes slightly downwards from the underside of the vertical webs and thus the insulating compound. On the underside of the circumferential collar 7 there is a support ring 10, which rests against the outer circumference of the flange ring 4, for supporting the electric hotplate 1 on the edge of an assembly opening of a hob or the like. intended. The underside of the hotplate body 3 is or the like with a cover 11 in the form of a flat metal cover. essentially closed, this cover 11 abutting the lower end face of the flange ring 4 and the underside of a central pin 12.

Der in der Mittelachse 8 vorgesehene Mittelzapfen 12 be­grenzt mit dem inneren Flanschring 5 einen innerhalb der Heizwiderstände 9 an der Unterseite des Kochplattenkör­pers 2 vorgesehenen Ringraum und steht gegenüber dem Flanschring nach unten weiter, nämlich vorzugsweise so weit wie der äußere Flanschring 4 vor. Der Mittelzapfen 12 ist mit einer Gewindebohrung versehen, mit welcher die Elektro­kochplatte in der Herdmulde festgelegt und die Abdeckung 11 gegen die Unterseite des Kochplattenkörpers 2 gespannt wer­den kann. Der genannte Ringraum ist an der Oberseite von der, etwa konstante Dicke aufweisenden Bodenwand der Vertiefung 6 begrenzt, die an der Unterseite eine über eine konkave Ausrundung an die Umfangsfläche des Mittelzapfens 12 anschließende, unter wenigen Winkelgraden, beispielsweise etwa 10° radial nach außen ansteigende, ringförmige Fläche 13 bildet, welche über eine entsprechende konkave Ausrundung in die Innenumfangsfläche des Flanschringes 5 übergeht.The central pin 12 provided in the central axis 8 delimits with the inner flange ring 5 an annular space provided within the heating resistors 9 on the underside of the hotplate body 2 and projects further downward from the flange ring, namely preferably as far as the outer flange ring 4. The center pin 12 is provided with a threaded bore, with which the electric hotplate is fixed in the hob and the cover 11 can be stretched against the underside of the hotplate body 2. Said annular space is delimited on the upper side by the approximately constant thickness of the bottom wall of the recess 6, which on the underside has a concave fillet that adjoins the circumferential surface of the central pin 12 and rises radially outwards at a few degrees, for example approximately 10 °, forms annular surface 13 which merges into the inner circumferential surface of the flange ring 5 via a corresponding concave fillet.

In dem Raum zwischen der Unterseite des Kochplattenkör­pers 2 und der Abdeckung 11 ist ein Temperaturbegrenzer 14 vorgesehen, der ein in dem genannten Ringraum liegendes Gehäuse 15 aus Steatit und einen durch dieses frei nach außen sowie radial zur Mittelachse 8 vorstehenden stabför migen Temperaturfühler 16 aufweist, welcher mit geringem Abstand unterhalb der spiraligen Stege des Kochplattenkör­pers bzw. des die Heizwiderstände 9 aufnehmenden Isolierma­teriales liegt und von diesen über seine Länge konstanten Abstand aufweist. Der Temperaturfühler 16 reicht nahezu bis zum Innenumfang des äußeren Flanschringes 4 und kann gegen­über dem inneren Flanschring 5 berührungsfrei angeordnet sein. Das in Draufsicht länglich-rechteckige und in Seiten­ansicht gegenüber seiner Breite flachere Gehäuse 15 liegt mit seiner Länserstreckung etwa tangential zum Mittel­zapfen 12, wobei seine obere, zur Kochfläche 3 bzw. zum Temperaturfühler 16 parallele Seite 17 mit geringem Abstand derart unterhalb der Fläche 13 des Kochplattenkörpers 2 liegt, daß zwischen dieser Seite 17 und der Fläche 13 ein im Querschnitt sich zum Flanschring 5 erweiternder Spalt gebildet ist. Das Gehäuse 15 weist an seiner Oberseite ein­teilig mit ihm ausgebildete, nach oben kegelstumpfförmig vorstehende Distanzglieder 18, 19 auf, die unterschiedlich weit über die obere Seite 17 vorstehen und mit ihren oberen Endflächen an der Fläche 13 des Kochplattenkörpers 2 anlie­gen. Durch Lageveränderung des Gehäuses 15 in Längsrichtung des Temperaturfühlers 16 kann dadurch die Höhenlage des Temperaturfühlers 16 verändert bzw. justiert werden. Zweck­mäßig jedoch ist die Anordnung so getroffen, daß das Gehäu­se 15 mit seinen zugehörigen Eckbereichen am Innenumfang 21 des inneren Flanschringes 5 beiderseits des Temperaturfüh­lers 16 anliegt. Diese Eckbereiche 20 sind in Draufsicht mit einem Krümmungsradius viertelkreis-förmig abgerundet, der kleiner als die Hälfte des in Längsrichtung des Tempe­raturfühlers 16 gemessenen Kantenmaßes des Gehäuses 15 ist. An seiner vom Temperaturfühler 16 abgekehrten, also an der dem Mittelzapfen 12 zugekehrten Seite weist das Gehäuse 15 die elektrischen Anschlüsse für den Temperaturbegrenzer 14 in Form von Anschlußfahnen 22 auf, die über die zugehörige Seite des Gehäuses 15 vorstehen und beispielsweise beider­seits der durch den Temperaturfühler 16 gelegten Axialebene des Kochplattenkörpers 2 liegen. An der ebenen, zur oberen Seite 17 parallelen Unterseite des Gehäuses 15 liegt ein Federglied 23 an, das beispielsweise durch eine einteilig mit der Abdeckung 11 ausgebildete, von dieser nach oben ragende Ausformung gebildet sein kann und das Gehäuse 15 gegen die Fläche 13 des Kochplattenkörpers 2 drückt.In the space between the underside of the hotplate body 2 and the cover 11, a temperature limiter 14 is provided, which has a housing 15 made of steatite in the said annular space and a rod which projects freely outwards and radially to the central axis 8 Migen temperature sensor 16, which lies at a short distance below the spiral webs of the hotplate body or the insulating material receiving the heating resistors 9 and has a constant distance from them over its length. The temperature sensor 16 extends almost to the inner circumference of the outer flange ring 4 and can be arranged in a contactless manner with respect to the inner flange ring 5. The lengthwise rectangular case 15, which is flatter in side view compared to its width, lies approximately tangentially to the central pin 12 with its elongation, its upper side 17 parallel to the cooking surface 3 or to the temperature sensor 16 being a short distance below the surface 13 of the hotplate body 2 lies that between this side 17 and the surface 13 a gap widening in cross section to the flange ring 5 is formed. The housing 15 has on its top in one piece with it, upwardly frustoconical protruding spacers 18, 19, which project to different extents from the upper side 17 and rest with their upper end faces on the surface 13 of the hotplate body 2. By changing the position of the housing 15 in the longitudinal direction of the temperature sensor 16, the height of the temperature sensor 16 can thereby be changed or adjusted. However, the arrangement is expediently such that the housing 15 with its associated corner regions rests on the inner circumference 21 of the inner flange ring 5 on both sides of the temperature sensor 16. In plan view, these corner regions 20 are rounded with a quarter circle in the form of a radius of curvature which is smaller than half of the edge dimension of the housing 15 measured in the longitudinal direction of the temperature sensor 16. On its side facing away from the temperature sensor 16, that is to say on the side facing the central pin 12, the housing 15 has the electrical connections for the temperature limiter 14 in the form of connecting lugs 22 which protrude beyond the associated side of the housing 15 and, for example, on both sides of the temperature sensor 16 placed axial plane the hotplate body 2 lie. On the flat underside of the housing 15, which is parallel to the upper side 17, there is a spring member 23, which can be formed, for example, by a design which is formed in one piece with the cover 11 and projects upwards therefrom and the housing 15 against the surface 13 of the hotplate body 2 presses.

Wie Fig. 3 zeigt, ist das Gehäuse 15 des Temperaturbegren­zers 14 mit einer in Draufsicht im wesentlichen allseits begrenzten Ausnehmung 24 für die vollständig versenkte Auf nahme der Schalterteile eines Schnapp-Schalters 25 verse­hen, an dessen Form die ausschließlich an der oberen Seite 17 auf ihrer vollen übrigen Weite offene Ausnehmung 24 an­gepaßt ist. Der Schalter 25 weist einen von einer Schnapp­feder 27 getragenen Schnappkontakt 26 auf, dem als Gegen­kontakt 28 ein gehäusefester Kontakt zugeordnet ist. Auf einen Druckpunkt der Schnappfeder 27 wirkt das innere Ende eines Innenstabes 29 des im wesentlichen zylindrischstab­förmigen Temperaturfühlers 16. Der zylindrische Innenstab 29 ist mit geringem radialem Bewegungsspiel in einem als Dehnrohr vorgesehenen Außenrohr 30 von verhältnismäßig ho­hem Ausdehnungskoeffizienten angeordnet, das mit seinem inneren Ende lagefest am Gehäuse 15 befestigt ist und des­sen freies Ende ein Justiertglied 31 in Form einer Justier­schraube trägt, an welcher das zugehörige äußere Ende des Innenstabes 29 abgestützt ist. Das innere Ende des Innen­stabes 29 steht das innere Ende des Außenrohres 30 vor und liegt in einer bis zur Ausnehmung 24 reichenden Nut in der oberen Seite 17 des Gehäuses 15. Die dem Schnappkontakt 26 zugehörige Anschlußfahne 22 ist durch einen Schenkel eines Kontaktträgers gebildet, der in schlitzförmige Ver­tiefungen des Gehäuses 15 von dessen oberen Seite 17 her eingesteckt ist. Entsprechend ist auch der Gegenkontakt 28 mit seiner mehrfach abgewinkelten Anschlußfahne 22 von der oberen Seite 17 in eine schlitzförmige Öffnung 15 einge­steckt.As shown in FIG. 3, the housing 15 of the temperature limiter 14 is provided with a recess 24, which is essentially limited on all sides, for the completely recessed mounting of the switch parts of a snap switch 25, the shape of which is exclusively on the upper side 17 on it full remaining width open recess 24 is adapted. The switch 25 has a snap contact 26 carried by a snap spring 27, to which a contact fixed to the housing is assigned as the mating contact 28. The inner end of an inner rod 29 of the essentially cylindrical rod-shaped temperature sensor 16 acts on a pressure point of the snap spring 27. The cylindrical inner rod 29 is arranged with little radial play in an outer tube 30 provided as an expansion tube of relatively high expansion coefficient, the inner end of which is fixed in position on the housing 15 is attached and the free end of which carries an adjusting member 31 in the form of an adjusting screw on which the associated outer end of the inner rod 29 is supported. The inner end of the inner rod 29 projects from the inner end of the outer tube 30 and lies in a groove extending to the recess 24 in the upper side 17 of the housing 15. The connecting lug 22 associated with the snap contact 26 is formed by a leg of a contact carrier, which in slot-shaped depressions of the housing 15 is inserted from its upper side 17. Correspondingly, the mating contact 28 with its multi-angled connecting lug 22 is inserted into a slot-shaped opening 15 from the upper side 17.

Das Außenrohr 30 des Temperaturfühlers 16 weist am inneren Ende eine länglich-rechteckige, allseits über seinen Außen­umfang vorstehende Flanschplatte 33 auf, welche von dem Außenrohr 30 derart durchsetzt ist, daß das Außenrohr 30 an der zugehörigen Seite der Flanschplatte 33 mit einem von seinem Ende gebildeten, nach außen geformten ringförmigen Kragen 34 anliegt und befestigt ist. Die Flanschplatte 33, die in entspanntem Zustand in ein oder zwei Ebenen gekrümmt sein kann, greift mit ihren längeren Enden in Schlitze 35 des Gehäuses 15 ein, die beiderseits an die Seitenflächen der Nut 32 anschließen. In diesen Schlitzen 35 ist die Flanschplatte 33 durch ihre federnde Eigenspannung gesi­chert. Benachbart zu den Schlitzen 35 liegt das Außenrohr 33 des Temperaturfühlers 16 im wesentlichen berührungsfrei in der Nut 32, derart, daß es frei über die zugehörige, die abgerundeten Eckbereiche 20 verbindende Längsseite des Ge­häuses 15 vorsteht.The outer tube 30 of the temperature sensor 16 has at the inner end an elongated rectangular flange plate 33 projecting on all sides over its outer circumference, which is penetrated by the outer tube 30 such that the outer tube 30 on the associated side of the flange plate 33 with one formed by its end , Outwardly shaped annular collar 34 abuts and is attached. The flange plate 33, which can be curved in one or two planes in the relaxed state, engages with its longer ends in slots 35 of the housing 15, which connect on both sides to the side surfaces of the groove 32. In these slots 35, the flange plate 33 is secured by its resilient internal stress. Adjacent to the slots 35, the outer tube 33 of the temperature sensor 16 lies essentially without contact in the groove 32, in such a way that it projects freely over the associated longitudinal side of the housing 15 connecting the rounded corner regions 20.

Zwei im Durchmesser größere und im wesentlichen gleich gro­ße Distanzglieder 18 sind beiderseits des Temperaturfühlers 16 in Nähe bzw. im Bereich jeweils eines Eckbereiches 20 vorgesehen, wobei ein unmittelbar an den zugehörigen Eckbe­reich 20 anschließendes Distanzglied 18 annähernd bis an den benachbarten Schlitz 35 reicht, während das andere Distanzglied 18 im wesentlichen zwischen dem benachbarten Schlitz 35 und dem benachbarten Eckbereich 20 liegt. Die oberen Endflächen dieser beiden Distanzglieder 18 liegen in einer gemeinsamen, zum Temperaturfühler 16 rechtwinkligen Ebene. Das dritte, im Durchmesser wesentlich kleinere Distanzglied 19 liegt im wesentlichen in einer Axialebene des Temperaturfühlers 16 und in Bzug auf die Distanzglieder 18 auf der anderen Seite der Ausnehmung 24 zwischen den Anschlußfahnen 22, derart, daß auch dieses Distanzglied außerhalb der Ausnehmung 24 bzw. unmittelbar benachbart zu dieser vorgesehen ist.Two spacers 18 of larger diameter and of substantially the same size are provided on either side of the temperature sensor 16 in the vicinity or in the area of a corner region 20, a spacer 18 directly adjoining the associated corner region 20 reaching approximately to the adjacent slot 35, while that another spacer 18 lies essentially between the adjacent slot 35 and the adjacent corner region 20. The upper end faces of these two spacers 18 lie in a common plane perpendicular to the temperature sensor 16. The third spacer 19, which is substantially smaller in diameter, lies essentially in an axial plane of the temperature sensor 16 and with respect to the spacers 18 on the other side of the recess 24 between the connecting lugs 22, such that this spacer is also outside the recess 24 or directly is provided adjacent to this.

Bei der Ausführungsform nach Fig. 4 weist die Flanschplatte 33a eine einteilig mit ihr ausgebildete, rohrförmige Muffe 36 auf, deren Länge nur etwa halb so groß wie ihr Durchmes­ser ist und die das innere Ende des Außenrohres 30a eng umgibt. Mit einem an die Länge der Muffe 36 angepaßten Ab­stand vom Endkragen 34a weist das Außenrohr 30a einen über seinen Außenumfang etwa um die Wandungsdicke der Muffe 36 vorstehenden, einteilig mit ihm ausgebildeten Ringbund auf, der durch einen angestauchten Bördelring 37 gebildet ist, in dessen Bereich die Wandung des Außenrohres 30a nach Art eines Falzes U-förmig doppelt aufeinander liegt. Gegen die­sen Bördelring 37 ist die äußere Stirnfläche der Muffe 36 mit dem Endkragen 34a gespannt, so daß eine sehr genaue und sichere Verbindung geschaffen ist. Die Flanschplatte 33a ist um eine quer zu ihrer Längsrichtung liegende Achse so gekrümmt, daß sie unmittelbar benachbart zur Muffe 36 an den an die Nut 32a anschließenden Begrenzungskanten der näher beim äußeren Ende des Temperaturfühlers 16a liegenden Seitenflächen der Schlitze 35a anliegt. Außerdem ist die Flanschplatte wenigstens im Bereich ihrer Enden um eine rechtwinklig bzw. parallel zu ihrer. Längsrichtung liegende Achse derart gekrümmt, daß sie an den gegenüberliegenden Seiten der Schlitze 35a nur mit ihren Eckbereichen anliegt. Die konkaven Krümmungsseiten beider Krümmungen liegen an der vom freien Ende des Temperaturfühlers 16a abgekehrten Seite der Flanschplatte 33a, die durch die beschriebene Ausbildung unter federnder Vorspannung zwischen den Seiten­flächen der Schlitze 35a verspannt sein kann. Außerdem liegt der Innenstab 29a stets unter Druck an dem Schnapp­schalter an, wodurch auch dieser in seiner Lage gegenüber dem Gehäuse 15a noch besser gesichert ist. In Fig. 4 sind auch ein abgerundeter Eckbereich 20a und ein Distanzglied 18a erkennbar.In the embodiment according to FIG. 4, the flange plate 33a has a tubular sleeve 36 formed in one piece with it, the length of which is only about half the diameter and which closely surrounds the inner end of the outer tube 30a. With a distance from the end collar 34a adapted to the length of the sleeve 36, the outer tube 30a has an annular collar projecting over its outer circumference approximately by the wall thickness of the sleeve 36 and formed in one piece with it, which is formed by an upset flange ring 37, in the area of which the Wall of the outer tube 30a in the manner of a fold is U-shaped twice on top of each other. Against this flange ring 37, the outer end face of the sleeve 36 is stretched with the end collar 34a, so that a very precise and secure connection is created. The flange plate 33a is curved about an axis lying transversely to its longitudinal direction in such a way that it lies directly adjacent to the sleeve 36 on the boundary edges adjoining the groove 32a of the side surfaces of the slots 35a closer to the outer end of the temperature sensor 16a. In addition, the flange plate is at least in the region of its ends at a right angle or parallel to it. Axis lying in the longitudinal direction is curved in such a way that it only rests on the opposite sides of the slots 35a with its corner regions. The concave curvature sides of both curvatures lie on the side of the flange plate 33a facing away from the free end of the temperature sensor 16a, which can be clamped between the side surfaces of the slots 35a by the described design under resilient prestress. In addition, the inner rod 29a is always under pressure against the snap switch, whereby this is also better secured in its position relative to the housing 15a. A rounded corner region 20a and a spacer 18a can also be seen in FIG.

In den Figuren 5 und 6 sind für einander entsprechende Teile die gleichen Bezugszeichen wie in den Figuren 1 und 2, jedoch mit dem Index "b" verwendet. Bei der Ausführungsform nach den Figuren 5 und 6 ist besonders vorteilhaft, daß Temperaturbegrenzer 14b, insbesondere dessen mit den Distanzgliedern 18b, 19b an der Unterseite des Kochplattenkörpers 2b anliegendes Schaltergehäuse einer sehr guten Belüftung ausgesetzt ist, so daß Wärmestaus im Bereich des Schaltergehäuses völlig vermieden werden können, während der Temperaturfühler 16b nach unten gut abgedeckt zwischen der Abdeckung 11b und der Unterseite des Kochplattenkörpers 2b angeordnet ist. Zu diesem Zweck weist die Abdeckung 11b im Zentrum eine, im dargestellten Ausführungsbeispiel annähernd kreisrunde Öffnung 39 in Form eines Durchbruches auf, von deren Randbereich ein etwa radial zum Mittelzapfen 12b liegendes, zungenförmiges und einteilig mit der Abdeckung 11b ausgebildetes Federglied 23b absteht. Dieses Federglied 23b reicht nur bis zum Mittelzapfen 12b, liegt an dessen Unterseite an, ist von dem in den Mittelzapfen 12b eingesetzten Gewindebolzen 38 durchsetzt und gegen die Unterseite des Mittelzapfens mit einer auf den Gewindebolzen 38 aufgeschraubten Mutter gespannt. Das im wesentlichen parallel zur Unterseite des Schaltergehäuses des Temperaturbegrenzers 14b mit geringem Abstand von dieser Unterseite etwa in der Ebene der unteren Stirnfläche des äußeren Flanschringes 4b liegende Federglied 23b geht an seinem radial äußeren Ende über eine annähernd rechtwinklige Abkröpfung in die Begrenzung der Öffnung 39 über, wobei diese Abkröpfung unmittelbar benachbart zu derjenigen Seite des Schaltergehäuses liegt, aus welcher der Temperaturfühler 16b nach außen ragt. Die Breite des Federgliedes 23b ist wesentlich kleiner als die parallel dazu gemessene Längserstreckung des Gehäuses 15b des Temperaturbegrenzers 14b, wobei das Federglied 23b etwa in der Mitte dieser Längserstreckung liegt. Im Anschluß an die Begrenzung der Öffnung 39 bildet die Abdeckung 11b durch rinnenförmige Einprägung an der Unterseite eine annähernd geschlossene Ringnut um die Mittelachse 8b, wobei die Bodenwand dieser Ringnut an der unteren Stirnfläche des inneren Flanschringes 5b abgestützt ist. In den Seitenwandungen und der Bodenwand dieser Ringnut ist ein radialer Schlitz 42 vorgesehen, dessen Breite und Tiefe jeweils gleich oder nur geringfügig größer als der Durchmesser des Temperaturfühlers 16b ist, so daß dessen unmittelbar an das Gehäuse 15b anschließender, verhältnismäßig kurzer Abschnitt seitlich und in der Höhe zentriert in diesen Schlitz 42 eingreifen kann. In Ansicht von unten ist durch die beschriebene Ausbildung das Gehäuse 15b des Temperaturbegrenzers 14b ausschließlich von dem Federglied 23b abgedeckt, während es beiderseits dieses Federgliedes 23b vollständig freiliegt und annähernd bis zur Begrenzung der Öffnung 39 reicht. Da in diesem Fall eine zusätzliche Sicherung der Abdeckung 11b gegenüber dem Kochplattenkörper 2b zweckmäßig sein kann, ist die Abdeckung 11b, außer im Bereich des Mittelzapfens 12b, zusätzlich gegenüber dem Kochplattenkörper 2b festgelegt. Zu diesem Zweck sind zwei einander beiderseits des Federgliedes 23b diametral gegenüberliegende Schrauben 40 unmittelbar benachbart zur Begrenzung der Öffnung 39 vorgesehen, die von unten in entsprechende Gewindebohrungen von augenartigen Verbreiterungen des inneren Flanschringes 5b eingeschraubt sind.In FIGS. 5 and 6, the same reference numerals are used for corresponding parts as in FIGS. 1 and 2, but with the index "b". In the embodiment according to FIGS. 5 and 6, it is particularly advantageous that temperature limiter 14b, in particular its switch housing which bears against the underside of hotplate body 2b with spacers 18b, 19b, is exposed to very good ventilation, so that heat build-up in the area of the switch housing is completely avoided can, while the temperature sensor 16b is arranged well covered between the cover 11b and the underside of the hotplate body 2b. For this purpose, the cover 11b has in the center an opening 39, approximately circular in the embodiment shown, in the form of an opening, from the edge region of which a tongue-shaped spring element 23b, which is approximately radial to the central pin 12b and protrudes in one piece with the cover 11b, projects. This spring member 23b only extends to the central pin 12b, rests on the underside thereof, is penetrated by the threaded bolt 38 inserted in the central pin 12b and is tensioned against the underside of the central pin by a nut screwed onto the threaded bolt 38. The spring member 23b lying essentially parallel to the underside of the switch housing of the temperature limiter 14b at a short distance from this underside approximately in the plane of the lower end face of the outer flange ring 4b passes at its radially outer end via an approximately right-angled offset into the delimitation of the opening 39, this offset being located immediately adjacent to the side of the switch housing from which the temperature sensor 16b protrudes outwards. The width of the spring member 23b is substantially smaller than the longitudinal extent of the housing 15b of the temperature limiter 14b measured parallel thereto, the spring member 23b lying approximately in the middle of this longitudinal extent. Following the delimitation of the opening 39, the cover 11b forms an approximately closed annular groove around the central axis 8b by channel-shaped embossing, the bottom wall of this annular groove being supported on the lower end face of the inner flange ring 5b. In the side walls and the bottom wall of this annular groove, a radial slot 42 is provided, the width and depth of which are in each case the same or only slightly greater than the diameter of the temperature sensor 16b, so that the relatively short section directly adjoining the housing 15b laterally and in the Height center can engage in this slot 42. In the view from below, the housing 15b of the temperature limiter 14b is covered exclusively by the spring member 23b, while it is completely exposed on both sides of this spring member 23b and extends approximately to the limit of the opening 39. In this case, since an additional securing of the cover 11b with respect to the hotplate body 2b may be expedient, the cover 11b is additionally fixed with respect to the hotplate body 2b, except in the area of the central pin 12b. For this purpose, two screws 40 diametrically opposite each other on both sides of the spring member 23b are provided directly adjacent to the delimitation of the opening 39, which are screwed from below into corresponding threaded bores of eye-like widenings of the inner flange ring 5b.

Das laschenförmige Federglied 23b trägt zwischen seinen Enden einen nach oben vorstehenden Nocken 41 in Form einer Ausprägung, der im wesentlichen die einzige Anlage des Federgliedes 23b an der Unterseite des Gehäuses 15b des Temperaturbegrenzers 14b bildet. Der Nocken 41 ist dabei zweckmäßig im Bereich eines Schaltknopfes des Temperaturbegrenzers 14b angeordnet, so daß er gegen diesen drückt und ihn unter federnder Vorspannung festlegt. Der Temperaturbegrenzer wird dadurch sicher und mit reproduzierbarer Wärmekoppelung an den Kochplattenkörper 2b angedrückt, und es ergibt sich eine einfache Montage.The tab-shaped spring member 23b carries between its ends an upwardly projecting cam 41 in the form of an expression which essentially forms the only contact of the spring member 23b on the underside of the housing 15b of the temperature limiter 14b. The cam 41 is expediently arranged in the region of a switch button of the temperature limiter 14b, so that it presses against it and fixes it under resilient pretension. The As a result, the temperature limiter is pressed securely onto the hotplate body 2b with reproducible heat coupling, and assembly is simple.

Claims (10)

1. Elektrokochplatte mit einem Kochplattenkörper (2), der an seiner von der Kochfläche abgekehrten Unterseite mit mindestens einem in eine Isoliermasse eingebetteten Heizwiderstand (9) und mit einem Temperaturbegrenzer (14) versehen ist, der ein in der Mittelzone des Koch­plattenkörpers (2) liegendes Gehäuse (15) mit einem Schalter (25) und einen auf diesen wirkenden, stabför­mig über das Gehäuse (15) in den Bereich des Heizwider­standes (9) vorstehenden Temperaturfühler (16) auf­weist, dadurch gekennzeichnet, daß das Gehäuse (15) des Temperaturbegrenzers (15) an seiner oberen Seite (17) offen ist und daß diese offene Seite (17) mit Abstand unterhalb der zugehörigen Fläche (13) der Unterseite des Kochplattenkörpers (2) liegt.1. Electric hotplate with a hotplate body (2) which is provided on its underside facing away from the cooking surface with at least one heating resistor (9) embedded in an insulating material and with a temperature limiter (14) which is located in the central zone of the hotplate body (2) Housing (15) having a switch (25) and a temperature sensor (16) projecting thereon and projecting rod-shaped above the housing (15) into the area of the heating resistor (9), characterized in that the housing (15) of the temperature limiter ( 15) is open on its upper side (17) and that this open side (17) lies at a distance below the associated surface (13) of the underside of the hotplate body (2). 2. Elektrokochplatte, insbesondere nach Anspruch 1, da­durch gekennzeichnet, daß das Gehäuse (15) des Tempera­turbegrenzers (14) über seine obere Seite (17) vorste hende Distanzglieder (18, 19), insbesondere kegel­stumpfförmige Vorsprünge, aufweist, mit welchen es an der Unterseite des Kochplattenkörpers (2) anliegt, wo­bei vorzugsweise mindestens drei Distanzglieder (18, 19) vorgesehen sind, von denen insbesondere zwei bei­derseits des inneren Endes des Temperaturfühlers (16) und eines etwa in Verlängerung des Temperaturfühlers (16) liegen.2. Electric hotplate, in particular according to claim 1, characterized in that the housing (15) of the temperature limiter (14) protrudes over its upper side (17) has spacers (18, 19), in particular frustoconical projections, with which it rests on the underside of the hotplate body (2), preferably at least three spacers (18, 19) being provided, two of which in particular on both sides of the inner end of the temperature sensor (16) and one are approximately in the extension of the temperature sensor (16). 3. Elektrokochplatte, insbesondere nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Unterseite des Koch­plattenkörpers (2) im Querschnitt im Bereich des Gehäu­ses (15) des Temperaturbegrenzers, beispielsweise von einem nach unten vorstehenden Mittelzapfen (12) zu einem nach unten vorstehenden und den Bereich des Heiz­widerstandes (9) am Innenumfang begrenzenden inneren Flanschring (5), radial nach außen ansteigt, daß insbe­sondere die näher beim Temperaturfühler (14) liegenden Distanzglieder (18) höher als das weiter davon entfernt liegende Distanzglied (19) sind und daß vorzugsweise das Gehäuse (15) des Temperaturbegrenzers (14), insbe­sondere mit abgerundeten Eckbereichen (20), am Innenum­fang des inneren Flanschringes (5) des Kochplattenkör­pers (2) anliegt.3. Electric hotplate, in particular according to claim 1 or 2, characterized in that the underside of the hotplate body (2) in cross section in the region of the housing (15) of the temperature limiter, for example from a downwardly projecting central pin (12) to a downwardly projecting and the area of the heating resistor (9) on the inner circumference delimiting inner flange ring (5) rises radially outwards, in particular that the spacers (18) closer to the temperature sensor (14) are higher than the spacer (19) further away and that preferably the housing (15) of the temperature limiter (14), in particular with rounded corner areas (20), bears against the inner circumference of the inner flange ring (5) of the hotplate body (2). 4. Elektrokochplatte, insbesondere nach Anspruch 3, da­durch gekennzeichnet, daß der Krümmungsradius des abge­rundeten Eckbereiches (20) des Gehäuses (15) des Tempe­raturbegrenzers (14) kleiner als die Hälfte von dessen in Längsrichtung des Temperaturfühlers (16) gemessener Breite ist, wobei insbesondere der größte Durchmesser des zugehörigen Distanzgliedes (18) in dessen Über­gangsbereich in das Gehäuse (15) mindestens so groß wie der Krümmungsradius des abgerundeten Eckbereiches (20) ist und/oder mindestens ein Distanzglied im zugehöri­gen, insbesondere abgerundeten, Eckbereich (20) des Gehäuses (15) liegt.4. Electric hotplate, in particular according to claim 3, characterized in that the radius of curvature of the rounded corner region (20) of the housing (15) of the temperature limiter (14) is less than half of its width measured in the longitudinal direction of the temperature sensor (16), in particular the largest diameter of the associated spacer (18) in its transition region into the housing (15) is at least as large as the radius of curvature of the rounded corner region (20) and / or at least one spacer lies in the associated, in particular rounded, corner region (20) of the housing (15). 5. Elektrokochplatte, insbesondere nach einem der vorher­gehenden Ansprüche, dadurch gekennzeichnet, daß die offene Seite (17) des Gehäuses (15) des Temperaturbe­grenzers (14) durch eine Flachseite des Gehäuses gebil­det ist und vorzugsweise dessen Montageöffnung für den von dieser Seite eingesetzten Schalter, insbesondere einen Schnapp-Schalter (25), und/oder den Temperatur­fühler (16) bildet.5. Electric hotplate, in particular according to one of the preceding claims, characterized in that the open side (17) of the housing (15) of the temperature limiter (14) is formed by a flat side of the housing and preferably its mounting opening for the switch used by this side, in particular a snap switch (25) and / or the temperature sensor (16). 6. Elektrokochplatte, insbesondere nach einem der vorher­gehenden Ansprüche, dadurch gekennzeichnet, daß der Temperaturfühler (16) durch ein als Dehnrohr vorgesehe­nes Außenrohr (30) und einen in diesem angeordneten Innenstab (29) mit abweichenden Ausdehnungskoeffizien­ten gebildet ist und daß insbesondere das Außenrohr (30) in Schlitze (35) an der oberen Seite (17) des Ge­häuses (15) mit einer an seinem inneren Ende vorgesehe­nen Flanschplatte (33) eingesteckt ist, die vorzugswei­se mit einer angeformten Muffe (36) auf das innere Ende des Außenrohres (30a) aufgesteckt ist, wobei die Muffe (36) insbesondere das innere Ende des Außenrohres (30a) zwischen einem Endkragen (34a) und einem angestauchten Bördelring (37) umgibt.6. Electric hotplate, in particular according to one of the preceding claims, characterized in that the temperature sensor (16) is formed by an outer tube (30) provided as an expansion tube and an inner rod (29) arranged therein with a different expansion coefficient and in particular the outer tube (30 ) is inserted into slots (35) on the upper side (17) of the housing (15) with a flange plate (33) provided on its inner end, which is preferably with a molded sleeve (36) onto the inner end of the outer tube (30a) is plugged on, the sleeve (36) in particular surrounding the inner end of the outer tube (30a) between an end collar (34a) and an upset flange ring (37). 7. Elektrokochplatte, insbesondere nach Anspruch 6, da­durch gekennzeichnet, daß die Flanschplatte (33a) nach Art einer Blattfeder um zwei zueinander rechtwinklige Krümmungsachsen gekrümmt ist und einerseits mit ihren an der konkaven Krümmungsseite liegenden Eckbereichen sowie andererseits benachbart zum Außenrohr (30a) mit ihrer konvexen Krümmungsseite an den einander gegen­überliegenden Seitenflächen von Schlitzen (35a) des Gehäuses (15a) anliegt.7. Electric hotplate, in particular according to claim 6, characterized in that the flange plate (33a) is curved in the manner of a leaf spring around two mutually perpendicular axes of curvature and on the one hand with its corner regions lying on the concave curvature side and on the other hand adjacent to the outer tube (30a) its convex curvature side rests on the mutually opposite side surfaces of slots (35a) of the housing (15a). 8. Elektrokochplatte, insbesondere nach einem der vorher­gehenden Ansprüche, dadurch gekennzeichnet, daß der Temperaturbegrenzer (15) federnd gegen die Unterseite des Kochplattenkörpers (2) gedrückt ist, wobei vorzugs­weise eine untere Abdeckung (11) des Kochplattenkörpers (2) ein an der Unterseite des Gehäuses (15) des Tempe­raturbegrenzers (14) anliegendes Federglied (23) auf­weist.8. Electric hotplate, in particular according to one of the preceding claims, characterized in that the temperature limiter (15) is resiliently pressed against the underside of the hotplate body (2), preferably a lower cover (11) of the hotplate body (2) on the underside of the Has housing (15) of the temperature limiter (14) adjacent spring member (23). 9. Elektrokochplatte, insbesondere nach einem der vorher­gehenden Ansprüche, dadurch gekennzeichnet, daß eine untere Abdeckung (11b) des Kochplattenkörpers (2b) min­destens eine Belüftungs-Öffnung (39) für das Gehäuse (15b) des Temperaturbegrenzers (14b) aufweist, wobei diese Öffnung (39) vorzugsweise durch einen Durchbruch im Zentrum der benachbart zur Begrenzung der Öffnung (39) unmittelbar gegenüber dem Kochplattenkörper (2b) festgelegten Abdeckung (11b) gebildet ist.9. Electric hotplate, in particular according to one of the preceding claims, characterized in that a lower cover (11b) of the hotplate body (2b) has at least one ventilation opening (39) for the housing (15b) of the temperature limiter (14b), this opening (39) is preferably formed by an opening in the center of the cover (11b) which is fixed adjacent to the delimitation of the opening (39) directly opposite the hotplate body (2b). 10. Elektrokochplatte, insbesondere nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß das Federglied (23b) durch eine vorzugsweise einteilig mit der Abdeckung (11b) ausgebildete und über eine Abkröpfung in diese überge­hende Lasche gebildet ist, die insbesondere etwa radial in die Öffnung (39) vorsteht, gegenüber einem Mittel­zapfen (12b) des Kochplattenkörpers (2b) festgelegt ist und vorzugsweise mit einem nach oben vorstehenden Nocken (41) an der Unterseite des Gehäuses (15b) des Temperaturbegrenzers (14b) anliegt.10. Electric hotplate, in particular according to claim 8 or 9, characterized in that the spring member (23b) by a preferably integrally formed with the cover (11b) and is formed by an offset into this tab, which in particular approximately radially into the opening ( 39) protrudes, is fixed relative to a central pin (12b) of the hotplate body (2b) and preferably bears with an upwardly projecting cam (41) on the underside of the housing (15b) of the temperature limiter (14b).
EP87102332A 1986-03-01 1987-02-19 Electrical cooking plate Expired - Lifetime EP0235680B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87102332T ATE76242T1 (en) 1986-03-01 1987-02-19 ELECTRIC HOTPLATE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863606794 DE3606794A1 (en) 1986-03-01 1986-03-01 ELECTRIC COOKING PLATE
DE3606794 1986-03-01

Publications (3)

Publication Number Publication Date
EP0235680A2 true EP0235680A2 (en) 1987-09-09
EP0235680A3 EP0235680A3 (en) 1988-03-02
EP0235680B1 EP0235680B1 (en) 1992-05-13

Family

ID=6295315

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87102332A Expired - Lifetime EP0235680B1 (en) 1986-03-01 1987-02-19 Electrical cooking plate

Country Status (8)

Country Link
US (1) US4754123A (en)
EP (1) EP0235680B1 (en)
JP (1) JPS62208590A (en)
AT (1) ATE76242T1 (en)
AU (1) AU598795B2 (en)
DE (2) DE3606794A1 (en)
ES (1) ES2032764T3 (en)
YU (1) YU30287A (en)

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Publication number Priority date Publication date Assignee Title
EP0338285A1 (en) * 1988-04-20 1989-10-25 E.G.O. Elektro-Geräte Blanc u. Fischer Electric-cooker plate

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Publication number Priority date Publication date Assignee Title
DE102018212094A1 (en) * 2018-07-19 2020-01-23 E.G.O. Elektro-Gerätebau GmbH Heating device for a hob and hob

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DE8103514U1 (en) * 1981-06-25 Fischer, Karl, 7519 Oberderdingen Temperature-sensitive switch, in particular for a signal device on cooking appliances
EP0100861A2 (en) * 1982-07-07 1984-02-22 E.G.O. Elektro-Geräte Blanc u. Fischer Electric cooking plate with a temperature-protected switchgear

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US4135081A (en) * 1974-05-10 1979-01-16 Karl Fischer Electric cooking plate with a temperature limiter
AU515663B2 (en) * 1974-05-10 1981-04-16 Karl Fischer Temperature limiter
FR2369674A1 (en) * 1977-12-13 1978-05-26 Snipeliski Jacques Thermostat with integral snap action switch - has coaxial tubes with different coefft. of expansion moving lever acting on leaf spring contact electrode
DE2901801A1 (en) * 1979-01-18 1980-07-31 Ego Regeltech Ceramic glass hot plate with temp. sensor - has warning lamp and bimetallic spiral in chamber in cover plate actuating switch contacts
DD156060A3 (en) * 1981-02-04 1982-07-28 Horst Hase PROTECTION DEVICE FROM OVERTEMPERATURE IN ELECTRICALLY HEATED CLOSED COOKING PLATES
DE3301689A1 (en) * 1983-01-20 1984-07-26 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen Electrical hot plate
ZA834811B (en) * 1982-07-07 1984-03-28 Ego Elektro Blanc & Fischer Electric hotplate with a thermostat
DE3410442A1 (en) * 1983-09-17 1985-09-26 Ego Elektro Blanc & Fischer TEMPERATURE PROBE, ESPECIALLY FOR A TEMPERATURE LIMITER FOR A GLASS CERAMIC COOKING UNIT

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Publication number Priority date Publication date Assignee Title
DE8103514U1 (en) * 1981-06-25 Fischer, Karl, 7519 Oberderdingen Temperature-sensitive switch, in particular for a signal device on cooking appliances
EP0100861A2 (en) * 1982-07-07 1984-02-22 E.G.O. Elektro-Geräte Blanc u. Fischer Electric cooking plate with a temperature-protected switchgear

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0338285A1 (en) * 1988-04-20 1989-10-25 E.G.O. Elektro-Geräte Blanc u. Fischer Electric-cooker plate

Also Published As

Publication number Publication date
EP0235680B1 (en) 1992-05-13
JPS62208590A (en) 1987-09-12
AU6956587A (en) 1987-09-03
YU30287A (en) 1989-04-30
AU598795B2 (en) 1990-07-05
ES2032764T3 (en) 1993-03-01
DE3778930D1 (en) 1992-06-17
ATE76242T1 (en) 1992-05-15
DE3606794A1 (en) 1987-09-03
EP0235680A3 (en) 1988-03-02
US4754123A (en) 1988-06-28

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