DE3124776A1 - Device for protecting against overtemperature in electrically heated closed hot plates, especially for large kitchens - Google Patents

Device for protecting against overtemperature in electrically heated closed hot plates, especially for large kitchens

Info

Publication number
DE3124776A1
DE3124776A1 DE19813124776 DE3124776A DE3124776A1 DE 3124776 A1 DE3124776 A1 DE 3124776A1 DE 19813124776 DE19813124776 DE 19813124776 DE 3124776 A DE3124776 A DE 3124776A DE 3124776 A1 DE3124776 A1 DE 3124776A1
Authority
DE
Germany
Prior art keywords
temperature limiter
protective cap
plate
adjusting screw
radiation protection
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.)
Ceased
Application number
DE19813124776
Other languages
German (de)
Inventor
Horst Hase
Heinz Hille
Dieter Kirsch
Klaus Koehler
Reiner Schoene
Wolfgang Welzel
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.)
Nagema VEB
Original Assignee
Nagema VEB
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 Nagema VEB filed Critical Nagema VEB
Publication of DE3124776A1 publication Critical patent/DE3124776A1/en
Ceased legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00Details of electric heating devices
    • H05B1/02Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0202Switches
    • H05B1/0213Switches using bimetallic elements
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00Ohmic-resistance heating
    • H05B3/68Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/74Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • H05B3/746Protection, e.g. overheat cutoff, hot plate indicator
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2213/00Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/04Heating plates with overheat protection means

Abstract

The invention relates to a device to protect against overtemperatures in electrically heated closed hot plates, especially for large kitchens, by means of which it is possible to replace all parts which are subject to wear. The aim of the invention is to reduce the energy consumption and to increase the life of the hot plate. The essence of the invention is characterised in that the temperature limiter is readjustable from the outside by means of an adjusting screw and is accessible through a connecting socket with a car, and is surrounded by a protective cap, the temperature limiter being arranged with the protective cap in a recess in the plate body, through a split radiation protection plate, a hole for the adjusting screw being provided in the protective cap, in the split radiation protection plate which is arranged under it, and in a closing plate, and in that the connecting braids and the temperature limiter are connected to one another by means of a permanent connection, especially a welded joint.

Description

Schutzvorrichtung vor Ubertemperatur bei elektrischProtection device against overtemperature in the case of electrical

beheizten geschlossenen Kochplatten, insbesondere für Großküchen Die Erfindung betrifft eine Schutzvorrichtung vor übertemperatur bei elektrisch beheizten geschlossenen Kochplatten, insbesondere für Großküchen, durch welche eine Auswechselbarkeit aller Verschleißteile der Kochplatten in Großkochherden möglich ist.heated closed hotplates, especially for large kitchens The invention relates to a protection device against excess temperature in the case of electrically heated closed hotplates, in particular for large kitchens, through which interchangeability all wear parts of the hotplates in large cookers is possible.

s sind bereits Schutzvorrichtungen vor Ubertemperatur bei elektrisch beheizten Kochplatten nach DE - ~ PS 856 926 kl. 21 h, 4/01 DE - - PS 937 543 kl. 21 h, 4/01 DE - - PS 1123 059 kl. 21 , 4/01 DE - OS 2343 834 kl. H 05 B, 1/02 DE - ~ OS 2620 004 kl. H 05 B, 3/68 DE - OS 2735 426 kl. H 05 B, 3/68 bekannt.They are already protective devices against overtemperature in the case of electrical heated hotplates according to DE - ~ PS 856 926 kl. 21 h, 4/01 DE - - PS 937 543 kl. 21 h, 4/01 DE - - PS 1123 059 kl. 21, 4/01 DE - OS 2343 834 kl. H 05 B, 1/02 DE - ~ OS 2620 004 kl. H 05 B, 3/68 DE - OS 2735 426 kl. H 05 B, 3/68 known.

Bei den bekannten Schutzvorrichtungen werden die Kochplatten mit Temperaturbegrenzer, die ein Bimetallausdehnungselement aufweisen, darin einem von einer Abdeckung abgeschlossenen Innenraum außerhalb der Unterseite in der Mitte des beheizten Bereiches der Kochplatte angeordnet ist, eingesetzt.In the known protective devices, the hotplates are equipped with a temperature limiter, which have a bimetallic expansion element, therein one closed off by a cover Inner space outside the bottom in the middle of the heated area of the hotplate is arranged, used.

Es ist ebenfalls bekannt, Kochplatten mit Temperaturfühler nach DE - AS 1188 744 kl. 21 h, 4/01 DE - OS 1565 049 kl. 21 h, 4/01 auszugestalten.It is also known, hot plates with temperature sensors according to DE - AS 1188 744 kl. 21 h, 4/01 DE - OS 1565 049 kl. 21 h, 4/01 to design.

Weiterhin ist bekannt nach DE - PS 1165 175 kl. 21 h, 4/01 DE - PS 1231 827 kl. 21 h, 4/01 DE - ~ PS 1234 881 kl. 21 h, 4/01 DE - AS 1277 471 kl. 21 h, 4/01 DE - AS 2063 055 kl. 21 h, 4/01 DE - - OS 2442 369 kl. H05 3, 3/68 zentral in der Kochplatte eine Öffnung vorzusehen, durch die ein federbelastetes Tastglied mit eingebautem Temperaturfühler gegen das aufgesetste Geschirr gedrückt wird.It is also known from DE - PS 1165 175 kl. 21 h, 4/01 DE - PS 1231 827 kl. 21 h, 4/01 DE - ~ PS 1234 881 kl. 21 h, 4/01 DE - AS 1277 471 kl. 21st h, 4/01 DE - AS 2063 055 kl. 21 h, 4/01 DE - - OS 2442 369 kl. H05 3, 3/68 central to provide an opening in the hotplate through which a spring-loaded feeler member with the built-in temperature sensor is pressed against the crockery that has been put on.

Diese Ausführungen mit Einbettmasse weisen jedoch den Nachteil auf, daß die Wiederverwendbarkeit der Kochplatten bei Verschleiß sehr begrenzt oder gar nicht möglich ist. Außerdem sind im Großkiichenbetrieb beim Einsatz von Elektrogeräten mit Kochplatten möglichst feste Verbindungen zwischen den Anschlüssen notwendig, um lockere Kontakte zu vermeiden. Ein wesentlicher Nachteil der Kochplatten mit federbelastetem Tastglied wird darin erkannt, daß die Kochplatte nicht geschlossen ist und somit Schmutz und überlaufendes Kochgut in den Bereich unterhalb der Kochplatte eindringen kann.However, these designs with investment material have the disadvantage that the reusability of the hotplates when worn is very limited or even not possible. In addition, are in Großkiichenbetrieb when using electrical devices with hotplates, connections between the connections that are as strong as possible are necessary, to avoid loose contacts. A major disadvantage of having hotplates spring-loaded feeler element is recognized that the hotplate is not closed is and thus dirt and overflowing food in the area below the hotplate can penetrate.

Durch Verschmutzung kann das Tastglied so verkleben, daß es nicht mehr funktionsfähig ist. Pur Großkochanlagen ist die Lösung nicht geeignet.Due to soiling, the probe element can stick together so that it does not is more functional. The solution is not suitable for large-scale cooking systems.

Zweck der Erfindung ist es, durch Verbesserung der Anordnung des Temperaturbegrenzers, den Energiebedarf zu senken und die Lebensdauer der Kochplatte zu erhöhen.The purpose of the invention is to improve the arrangement of the temperature limiter, reduce energy consumption and increase the service life of the hotplate.

s ist deshlab Aufgabe der Erfindung, eine vollständige Auswechselbarkeit der Verschleißteile der Kochplatte zu schaffen und somit die Wiederverwendbarkeit der Kochplatte zu gewährleisten.It is therefore the object of the invention to be completely interchangeable of the wearing parts of the hotplate and thus its reusability the hotplate.

Erfindungsgemäß wird dies dadurch gelöst, daß die Platte mit Rillen, insbesondere Gußrillen,. derart versehen ist, daß im Zentrum der Platte eine unbeheizte Mittelzone entsteht. Innerhalb dieser Mittel Zone ist der Temperaturbegrenzer, dessen Bimetall die Temperatur unmittelbar von der Plattenoberfläche abtastet, angeordnet. Der Temperaturbegrenzer ist mit einem Niet mit einer Schutzkappe verbunden. Diese schützt den Temperaturbegrenzer vor direkter Wärmestrahlung. In der Schutzkappe und in einem unter dieser angeordneten geteilten Strahlungsschutzblech sowie in einem Abschlußblech ist eine Bohrung vorhanden, durch welche eine Justierschraube des Temperaturbegrenzers erreichbar und somit von außen ohne demontage der Platte justierbar ist. Die Anschlußfahnen des Temperaturbegrenzers sind mit der nach außen geführten Anschlußlitze der Heizwendel verschweißt.According to the invention this is achieved in that the plate with grooves, in particular casting grooves. is provided in such a way that in the center of the plate an unheated Central zone is created. Within this middle zone is the temperature limiter, its Bimetal samples the temperature directly from the plate surface, arranged. The temperature limiter is connected to a protective cap with a rivet. These protects the temperature limiter from direct heat radiation. In the protective cap and in a divided radiation protection plate arranged below this, as well as in an end plate has a hole through which an adjusting screw of the temperature limiter and therefore accessible from the outside without dismantling the plate is adjustable. The connection lugs of the temperature limiter are facing outwards welded lead wire of the heating coil.

Die Erfindung soll nachstehend än einem Ausführungsbeispiel näher erläutert werden. Die zugehörige Zeichnung eine schematische Darstellung der Schutzvorrichtung.The invention is to be described in more detail below in an exemplary embodiment explained. The accompanying drawing is a schematic representation of the protective device.

Der in der Figur dargestellte Plattenkörper 1 aus Grauguß ist im Inneren mit einer Aussparung versehen. Die Kochplatte ist als keramikisolierte Platte ausgebildet und besitzt einen an einem Heizwendel 2 angeschweißten Temperaturbegrenzer 3, der als Bimetall-Sprungkontakt-Schalter ausgeführt ist.The plate body 1 made of gray cast iron shown in the figure is inside provided with a recess. The hotplate is designed as a ceramic-insulated plate and has a temperature limiter 3 welded to a heating coil 2, the is designed as a bimetal snap contact switch.

Der Temperaturbegrenzer 3 ist in der Aussparung des Plattenkörpers 1, welche eine unbeheizt Mittelzone darstellt, angeordnet. Der Temperaturbegrenzer 3 ist durch einen Niet mit einer Schutzkappe 4 aus nichtrostendem Stahlblech verbunden. Eine in der Schutzkappe 4 vorhandene Bohrung dient zur Durchführung der Justierschraube 5 des Temperaturbegrenzers 3.The temperature limiter 3 is in the recess of the plate body 1, which represents an unheated central zone. The temperature limiter 3 is connected by a rivet to a protective cap 4 made of stainless steel sheet. A hole in the protective cap 4 is used to carry out the adjusting screw 5 of the temperature limiter 3.

Die Justierschraube 5 kann bei Erfordernis von außen nachjustiert werden. Die Justierschraube 5 ist durch eine Anschlußdose 9 mit Deckel 10 gegen unbefugten Zugriff geschützt. Die Schutzkappe 4 mit Xemperaturbegrenzer 3 wird von einem geteilten Strahl schutzblech 6 fest an die Oberfläche des Plattenkörpers 1 der Kochplatte angedrückt.The adjusting screw 5 can be readjusted from the outside if necessary will. The adjusting screw 5 is countered by a junction box 9 with a cover 10 unauthorized access protected. The protective cap 4 with temperature limiter 3 is from a split beam protection plate 6 firmly to the surface of the plate body 1 pressed against the hotplate.

Die Anschlußfahnen 7 des Temperaturbegrenzers 3 werden mit der Heizwendel 2 und der Anschlußlitze verschweißt.The connecting lugs 7 of the temperature limiter 3 are with the heating coil 2 and the pigtail welded.

Die Wirkungsweise dieeer Schutzvorrichtung ist wie folgt: Das Bimetall des Temperaturbegrenzers 3 tastet die Temperatur unmittelbar von der Plattenoberfläche ab und bewirkt bei Uberschreiten einer bestimmten Temperatur an der Plattenoberfläche der Kochplatte ein Abschalten eines Teilss der Leistung der Kochplatte.This protective device works as follows: The bimetal the temperature limiter 3 samples the temperature directly from the plate surface and causes when a certain temperature is exceeded on the plate surface the hotplate switching off part of the power of the hotplate.

Durch die Schweißverbindung zwischen Temperaturbegrenzer 3 mit Anschlußfahnen 7 und der Anachlußlitze der Heiswzadel 2 wird bewirkt, daß keine lockeren Kontakte entstehen können. Die den Temperaturbegrenzer 3 umgebende Schutzkappe 4 vermindert die Beeinflussung des Temperaturbegrenzers durch direkte Wärmestrahlung.Through the welded connection between the temperature limiter 3 with connection lugs 7 and the connecting wire of the hot needle 2 ensures that no loose contacts can arise. The protective cap 4 surrounding the temperature limiter 3 is reduced the influence of direct thermal radiation on the temperature limiter.

Aufstellung der verwendeten Bezugszeichen Plattenkörper 1 Heizwendel 2 Temperaturbegrenzer 3 Schutzkappe 4 Justierschraube 5 Strahlenschutzblech 6 Anschlußfahnen 7 Abschlußblech 8 Anschlußdose 9 Deckel tOList of the reference symbols used plate body 1 heating coil 2 temperature limiter 3 protective cap 4 adjusting screw 5 radiation protection plate 6 connection lugs 7 End plate 8 Junction box 9 Cover tO

Claims (1)

Patentanspruch Schutzvorrichtung vor Übertemperatur bei elektrisch beheisten geschlossenen Kochplatten, insbesondere für GroßkUchen, ausgeführt als keramikisolierte Kochplatte mit Heizwendel, bestehend aus einem Temperaturbegrenzer mit Bizetall-Sprungkontakt-Schalter und Justierschraube in der unbeheizten Mittelzone, dadurch gekennzeichnet, daß der Temperaturbegrenzer (3) mittels Justierschraube (5) von außen nachjustierbar und durch eine Anschlußdose (9) mit Kappe (10) erreichbar ist und mit einer Schutzkappe (4), bestehend aus nichtrostendem Stahlblech oder dergleichen, umgeben ist, wobei der Temperaturbegrenzer (3) mit der Schutzkappe (4) in einer Ausspaltung des Plattenkörpers (1) hinter einem geteiltem Strahlungsschutzblech (6) angeordnet ist, wobei in der Schutzkappe (4) und in dem unter diesem angeordneten geteilten Strahlungsschutzblech (6) sowie in einem Abschlußblech eine Bohrung für die Justierschraube (5) vorhanden ist und daß die Anschlußlitzen und der Temperaturbegrenzer (3) durch eine feste Verbindung, insbesondere Schweißverbindung, miteinander verbunden sind.Patent claim protection device against overtemperature in the case of electrical beheisten closed hotplates, especially for large kitchens, designed as ceramic-insulated hotplate with heating coil, consisting of a temperature limiter with bi-metal snap contact switch and adjusting screw in the unheated central zone, characterized in that the temperature limiter (3) by means of an adjusting screw (5) can be readjusted from the outside and can be reached through a junction box (9) with cap (10) and with a protective cap (4) made of stainless steel sheet or the like, is surrounded, the temperature limiter (3) with the protective cap (4) in a split in the plate body (1) behind a split radiation protection plate (6) is arranged, in the protective cap (4) and in the one arranged below it split radiation protection plate (6) and a hole for in an end plate the adjusting screw (5) is present and that the connecting wires and the temperature limiter (3) connected to one another by a fixed connection, in particular a welded connection are.
DE19813124776 1981-02-04 1981-06-24 Device for protecting against overtemperature in electrically heated closed hot plates, especially for large kitchens Ceased DE3124776A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD22741381A DD156060A3 (en) 1981-02-04 1981-02-04 PROTECTION DEVICE FROM OVERTEMPERATURE IN ELECTRICALLY HEATED CLOSED COOKING PLATES

Publications (1)

Publication Number Publication Date
DE3124776A1 true DE3124776A1 (en) 1982-09-02

Family

ID=5528940

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19813124776 Ceased DE3124776A1 (en) 1981-02-04 1981-06-24 Device for protecting against overtemperature in electrically heated closed hot plates, especially for large kitchens

Country Status (5)

Country Link
BG (1) BG43677A1 (en)
CS (1) CS258004B1 (en)
DD (1) DD156060A3 (en)
DE (1) DE3124776A1 (en)
YU (1) YU40620B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4605841A (en) * 1982-07-07 1986-08-12 E.G.O. Elektro-Gerate Blanc Und Fischer Thermostat for electric hotplate
DE3606794A1 (en) * 1986-03-01 1987-09-03 Ego Elektro Blanc & Fischer ELECTRIC COOKING PLATE

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4605841A (en) * 1982-07-07 1986-08-12 E.G.O. Elektro-Gerate Blanc Und Fischer Thermostat for electric hotplate
DE3606794A1 (en) * 1986-03-01 1987-09-03 Ego Elektro Blanc & Fischer ELECTRIC COOKING PLATE
US4754123A (en) * 1986-03-01 1988-06-28 E.G.O. Elektro-Gerate Blanc U. Fischer Electric hotplate

Also Published As

Publication number Publication date
YU40620B (en) 1986-02-28
DD156060A3 (en) 1982-07-28
BG43677A1 (en) 1988-07-15
CS582781A1 (en) 1987-12-17
CS258004B1 (en) 1988-07-15
YU303481A (en) 1983-06-30

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