EP0124022B1 - Cooker hob with gas heated hot plates and a continuous cooking area of glass-ceramic or similar material - Google Patents

Cooker hob with gas heated hot plates and a continuous cooking area of glass-ceramic or similar material Download PDF

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Publication number
EP0124022B1
EP0124022B1 EP84104375A EP84104375A EP0124022B1 EP 0124022 B1 EP0124022 B1 EP 0124022B1 EP 84104375 A EP84104375 A EP 84104375A EP 84104375 A EP84104375 A EP 84104375A EP 0124022 B1 EP0124022 B1 EP 0124022B1
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EP
European Patent Office
Prior art keywords
gas
surface according
cooking surface
cooking
structural part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP84104375A
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German (de)
French (fr)
Other versions
EP0124022A3 (en
EP0124022A2 (en
Inventor
Jürgen Naubik
Herwig Dipl.-Ing. Scheidler
Klaus Kristen
Fred Rieck
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.)
Schott AG
Carl Zeiss AG
Original Assignee
Carl Zeiss AG
Schott Glaswerke AG
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
Priority claimed from DE19833315745 external-priority patent/DE3315745C2/en
Priority claimed from DE19843409334 external-priority patent/DE3409334A1/en
Application filed by Carl Zeiss AG, Schott Glaswerke AG filed Critical Carl Zeiss AG
Priority to AT84104375T priority Critical patent/ATE43897T1/en
Publication of EP0124022A2 publication Critical patent/EP0124022A2/en
Publication of EP0124022A3 publication Critical patent/EP0124022A3/en
Application granted granted Critical
Publication of EP0124022B1 publication Critical patent/EP0124022B1/en
Expired legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/04—Stoves or ranges for gaseous fuels with heat produced wholly or partly by a radiant body, e.g. by a perforated plate
    • F24C3/06—Stoves or ranges for gaseous fuels with heat produced wholly or partly by a radiant body, e.g. by a perforated plate without any visible flame
    • F24C3/067—Ranges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/10—Arrangement or mounting of ignition devices
    • F24C3/106—Arrangement or mounting of ignition devices of flash tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/12—Arrangement or mounting of control or safety devices
    • F24C3/126—Arrangement or mounting of control or safety devices on ranges

Definitions

  • the invention relates to a hob with gas-heated burners according to the preamble of claim 1.
  • Gas-heated hobs with a continuous cooking surface made of glass ceramic or similar material are known. They are, for example, in DE-PS. en 24 40 701, 27 21 921, 26 33 849 of DE-A-30 36 637 and in the FR-PS. en 2 058 722 and 2 076 174.
  • the hotplates of these known hobs are equipped with gas radiant burners, e.g. B. according to DE-PS 26 33 849 or DE-A-30 36 637 or heated with atmospheric burners.
  • Each cooking zone of this hob is assigned a gas radiation burner, which consists of a gas mixing chamber with an externally attached venturi tube with a gas nozzle and a perforated ceramic plate that closes off the gas mixing chamber.
  • a gas radiation burner which consists of a gas mixing chamber with an externally attached venturi tube with a gas nozzle and a perforated ceramic plate that closes off the gas mixing chamber.
  • DE-PS 26 33 849 describes this type of burner.
  • this ceramic plate is made to glow by small flames that burn at the end of the perforation and acts as a radiant heater.
  • a sheet metal ring hereinafter referred to as the exhaust ring, is placed on this burner arrangement as a combustion chamber limitation, which is supported on several springs attached to the combustion chamber and is pressed by the latter against the glass ceramic cooking surface from below via a sealing ring made of refractory material.
  • the exhaust ring carries a rod expansion switch to limit the temperature of the burner and the necessary ignition and monitoring electrodes as well as an exhaust nozzle.
  • the latter opens into a sheet metal flue gas duct that discharges the burner flue gases into the warming zone or directly from the trough.
  • the warming zone is heated by the exhaust gases from one or more hotplate burners. It consists of an open sheet metal trough with a sealing ring and connections for the exhaust gas ducts as well as an exhaust duct.
  • the tray is also pressed against the cooking surface by springs.
  • the exhaust gases are led into the free space via a system of baffles, which serve to mix the hot exhaust gases with the cool ambient air.
  • the burning points are controlled with assigned magnetic valves, which are arranged in the trough space in the course of the gas lines.
  • a separate, heat-insulated housing is provided for the temperature-sensitive control and monitoring electronics, which is attached to the side or front of the hob or mounted externally elsewhere.
  • the various known cooktops of the type described above are each constructed from similar individual components with a similar function and have a significant disadvantage insofar as the exhaust gas-carrying parts made of sheet metal become very hot during operation and thus heat up the trough space which surrounds the burning point, so that electrical lines and auxiliary elements, such as.
  • gas control valves which are arranged in the trough space, are subject to severe temperature stresses.
  • the object of the invention is therefore to design a hob of the type mentioned for gas heating with a continuous cooking surface made of glass ceramic or similar material so that undesirable and disadvantageous heating of the trough space is avoided, the hob being simple and inexpensive to produce with little assembly effort and that is mechanically stable with good thermal insulation.
  • FIGS. 1-8 serve to explain the invention and reflect the variety of possible embodiments.
  • the examples shown in Figures 1 to 7 relate to hobs that are heated with gas radiant burners.
  • An embodiment with heating by atmospheric burners is shown in the example according to FIG. 8 and described in more detail below.
  • the main element of the gas-heated hob with a continuous cooking surface made of glass ceramic or similar material is a low-mass component made of refractory material, preferably made of aluminum silicate fiber with an inorganic binder, into which all the burning points and one or more warming zones of the hob with their essential components are molded.
  • FIG. 1 Such a component for hobs with three hotplates, which are heated with gas radiant burners and which are equipped with a warming zone, is shown in plan view in FIG. 1;
  • Figure 2 shows a section along the Line AA in Figure 1 through the right front focal point 1 in this low-mass component 9 made of refractory material.
  • FIG. 1 In the plan view (FIG. 1) of the component 9 one can see three focal points 1 with circular, perforated nozzle plates 6 made of ceramic, of which only a quarter is shown. These nozzle plates 6 separate the combustion chambers 2 from the gas mixing chambers 3 below (FIG. 2), which are not shown in FIG. 1.
  • Exhaust ducts 5 lead from the combustion chambers 2 to the cooktop center.
  • a common pilot burner 10 with an ignition and monitoring device 11 is arranged there for all the burning points 1 and will be described later.
  • the exhaust gas ducts 5 guide the exhaust gases from the center into a warming zone 7 with an exhaust duct or outlet duct 8, through which the exhaust gases are discharged from the hob.
  • recesses 12 are formed in the component 9, into which the temperature limiters 13, here rod expansion switches, can be inserted precisely and permanently fixed there.
  • the electrical supply lines of the temperature limiter 13, as well as other electrical auxiliary elements, which are not shown in FIG. 1, for example the leads of ignition and monitoring electrodes, can expediently be made from stable wires which, when the part 9 is formed, are incorporated into the mass of refractory material be embedded and thus act as additional stiffening of the component 9 after drying. Further details of the component 9 made of refractory material can be seen from the sectional drawing in FIG. 2. For the sake of clarity, all the parts shown behind the burning point 1 in FIG. 1, such as, for example, the warming zone 7, are not shown.
  • the gas mixing chamber 3 of the burning points 1 with the gas mixing device 4 is molded onto the combustion chambers 2 in FIG.
  • the nozzle plate 6 is supported all around on a seat 17 and glued into this seat 17 with (not shown) adhesive, preferably an inorganic refractory binder.
  • the exhaust duct 5 is covered with a separate refractory part (cover 15a).
  • the cover 15a is advantageously made of the same material as part 9 and glued into this.
  • the combustion chamber 2 is sealed off from the cooking surface 14 by a soft seal 16 made of aluminum silicate fiber.
  • All three focal points of the hob are constructed in the same way and molded into component 9 with its components, such as combustion chamber 2, gas mixing chamber 3, exhaust duct 5, gas mixing device 4 together with the warming zone 7 and the exhaust duct 8.
  • the entire heating device of the hob is thus combined in a single, good heat-insulating component with a small height, part 9, which can be inexpensively manufactured using known wet-molding techniques for silicate fiber materials and can be installed in the hob with minimal assembly effort.
  • recesses 12 recesses 12
  • recesses 12 recesses 12
  • additional adjustment work as is required in the known cooktops, can largely be dispensed with .
  • the greatest possible freedom is given with regard to the choice of the cooking surface diameter and its position in the cooking surface.
  • the gas mixing device 4 (FIG. 2) still requires an explanation: the conical bore in FIG. 2 acts together with the gas nozzle 30 as an injector, as a result of which the combustion air is sucked in.
  • the necessary overpressure in the gas mixing chamber 3 is achieved by the sudden change in cross section at the end of the conical bore to the cross section of the gas mixing chamber 3.
  • the gas is mixed with the combustion air by vortex formation.
  • the air quantity can be adjusted with an air throttle disk 32, which is screwed onto the thread 31 of the gas nozzle 30. Tests have shown that the burners work well with this simple gas mixing device 4 and in particular that the exhaust gas composition is guaranteed in accordance with the regulations.
  • the gas nozzle 30 and the air throttle disk 32 are not integrated in the component 9. Appropriately, they are combined for all burners together with the necessary gas supply lines and gas control valves in a prefabricated unit.
  • the component 9 can be produced in one piece or, if required by the molding technology used, can be composed of several parts. For example, it can be divided into an upper and a lower part by a parting line, which is indicated in FIG. 3 by the line E-E, which are produced separately and then glued or mechanically pressed together.
  • FIG. 3 shows further embodiments of the hob according to the invention.
  • the same reference numerals in these and all other figures denote components with the same function or identical components.
  • cover plate 15 covers all the exhaust gas ducts 5 (FIG. 3) and from which the openings for the combustion chambers 2 of the hotplate burners (FIG. 1) and the warming zone 7 (FIG. 1) are punched out.
  • cover plate 15 is made, for example, of aluminum silicate fiber material with an inorganic binder. It can be glued to the cooking surface 14.
  • the component 9 is designed here in two parts and is through the upper part 9a and the lower part 9b are formed, the separating surface of which is indicated by the line EE in FIG.
  • the nozzle plate 6 made of a special ceramic material is glued into the seat 17 provided for this purpose, as shown on the left in FIG.
  • the nozzle plate 6 is made of silicate fiber material and molded with the upper part 9a in one operation, for example as shown in FIG. 3 on the right.
  • the nozzle plate is here a component of component 9, which is created by gluing parts 9a and 9b in plane E-E.
  • FIG. 4 A solution in which the upper part 9a is not glued to the lower part 9b is shown in FIG.
  • the two parts are equipped with the elements of a labyrinth seal 23 and are pressed tightly against one another with a pressure device.
  • the remaining parts in FIG. 4 correspond to the representations in FIGS. 2 or 3.
  • the labyrinth seals 23, as shown in FIG. 4a are designed with an air gap 23a of 1.5 mm to 2 mm in height.
  • FIGS. 5 and 5a show a simple and maintenance-friendly device for assembling the complete heating unit, which is composed of component 9 (FIG. 2) and cover plate 15 (FIG. 3).
  • the parts mentioned are placed in an auxiliary frame 18 made of sheet steel, which presses the heating unit from parts 9 and 15 against the cooking surface 14 with levers 19, as shown in FIG. 5a.
  • the levers 19 are rotatably fastened with rivets 22 to the cooking surface frame 21, which in turn is firmly connected to the cooking surface 14 via the adhesive 20.
  • the component 9 described above can also be produced in a mixed construction, as shown in FIG. 6, from refractory material and sheet metal.
  • the parts 9a and 15 made of refractory material (FIG. 3), which limit the combustion chambers 2 and the exhaust gas channels 5 and also the warming zone 7 (FIG. 1), are expediently retained.
  • the gas mixing chambers 3 (FIG. 6) with an all-round seat 17, into which the nozzle plates 6 can be glued are stamped into a common sheet metal trough 9c. If necessary, further depressions for the area of the warming zone 7 (FIG. 1) and the exhaust duct areas can be embossed in the sheet metal trough. Additional beads can serve to stiffen the sheet pan 9c.
  • the parts 9a and 15 are inserted or glued into the tub 9c.
  • the gas mixing chambers 3 are supplied with the gas-air mixture via attached mixing devices 4, for example Venturi tubes, which can partially protrude into the gas mixing chambers.
  • the weight of the hob can be further reduced by the common component 9 for the burners 1 and the warming zone 7 (Figure 1) made of foamed aluminum silicate material with a binder. If this material is open-pore, an additional seal is required in the gas mixing chamber area of component 9. As shown in FIG. 7, this seal can be achieved by inserting a gas mixing chamber 3 into the component 9 as a tin pot (container 3a).
  • the tin pot 3a is expediently firmly glued to the component 9.
  • the tin pot 3a can also be arranged such that it surrounds the gas mixing chamber 3 molded into the component 9 on the outside. All other features of the arrangement in FIG. 7 correspond to the features of the explanations described above.
  • the hotplate burner 1 (FIG. 1) is designed as a gas radiation burner with a mixing chamber 3 and the nozzle plate 6. If component 9 (FIG. 2 or 3) is modified in accordance with FIG. 8, atmospheric burners can be used for heating the hotplate.
  • the combustion chamber 2 in FIG. 8 is larger than in the previous example, and the mixing chamber is omitted.
  • the burner exhaust gases from the atmospheric burner 24 pass through an annular exhaust gas duct 5 at the upper edge of the combustion chamber 2, which is covered with the cover plate 15, into an exhaust gas duct system, which can be designed, for example, according to FIG. 1, and heat the warming zone 7 (FIG. 1).
  • an exhaust gas duct system which can be designed, for example, according to FIG. 1, and heat the warming zone 7 (FIG. 1).
  • the exhaust duct 8 (FIG.
  • an exhaust gas blower is expediently and in a known manner attached, which supports the exhaust gas flow and ensures the forced ventilation of the combustion chamber 2 in FIG. 8 through the large bottom opening 25.
  • the burner 24 is ignited through the exhaust gas duct 5 via a pilot burner in the cooktop center, which is provided there jointly for all the burners in the cooktop (see also FIG. 1). Only one pilot tube 10b of this pilot burner is shown in FIG. If the hotplate burners are ignited and monitored individually, 24 ignition electrodes 101 and monitoring thermocouples 111 are attached to the respective burner in a known manner instead of the common pilot burner. These parts are indicated by dashed lines in FIG.

Description

Die Erfindung bezieht sich auf ein Kochfeld mit gasbeheizten Brennern gemäß dem Oberbegriff des Patentanspruchs 1. Gasbeheizte Kochfelder mit einer durchgehenden Kochfläche aus Glaskeramik oder ähnlichem Material sind bekannt. Sie werden beispielsweise in den DE-PS. en 24 40 701, 27 21 921, 26 33 849 der DE-A-30 36 637 sowie in den FR-PS. en 2 058 722 und 2 076 174 beschrieben. Die Kochstellen dieser bekannten Kochfelder werden mit Gasstrahlungsbrennem, z. B. entsprechend DE-PS 26 33 849 bzw. DE-A-30 36 637 oder mit atmosphärischen Brennern beheizt. Unterschiede zwischen den Ausführungsformen gemäß den oben genannten Patenten bestehen unter anderem in der Art der Verbrennungsluft- und Abgasführung, die bei einigen Geräten - etwa entsprechend der DE-PS 20 76 174 oder DE-A-30 36 637 mit Hilfsgebläsen durchgeführt wird.The invention relates to a hob with gas-heated burners according to the preamble of claim 1. Gas-heated hobs with a continuous cooking surface made of glass ceramic or similar material are known. They are, for example, in DE-PS. en 24 40 701, 27 21 921, 26 33 849 of DE-A-30 36 637 and in the FR-PS. en 2 058 722 and 2 076 174. The hotplates of these known hobs are equipped with gas radiant burners, e.g. B. according to DE-PS 26 33 849 or DE-A-30 36 637 or heated with atmospheric burners. Differences between the embodiments according to the above-mentioned patents exist, inter alia, in the type of combustion air and exhaust gas routing which is carried out on some devices, for example in accordance with DE-PS 20 76 174 or DE-A-30 36 637, with auxiliary fans.

Aus der DE-A 30 36 637 ist ein Kochherd mit Strahlungsbrennern bekannt, wobei die Abluft entweder über einen Abgasschacht ins Freie geleitet wird oder aber zum Zwecke der Raumheizung durch einen Lüfter in den zu beheizenden Raum eingeblasen werden kann.From DE-A 30 36 637 a cooker with radiant burners is known, the exhaust air either being passed outside via an exhaust duct or can be blown into the space to be heated by a fan for the purpose of space heating.

Der prinzipielle Aufbau bekannter Kochgeräte der oben genannten Art wird im folgenden am Beispiel eines mit Gasstrahlungsbrennem beheizten Kochfeldes mit durchgehender Kochfläche aus Glaskeramik beschrieben, das mit drei Kochzonen und einer Warmhaltezone ausgerüstet ist.The basic structure of known cooking appliances of the type mentioned above is described below using the example of a hob heated with gas radiant burners with a continuous glass ceramic cooking surface, which is equipped with three cooking zones and a warming zone.

Jeder Kochzone dieses Kochfeldes ist ein Gasstrahlungsbrenner zugeordnet, der aus einer Gasmischkammer mit außen angesetztem Venturirohr mit Gasdüse und einer perforierten Keramikplatte besteht, die die Gasmischkammer nach oben abschließt. Die DE-PS 26 33 849 beschreibt diesen Brennertyp. Im Betrieb wird diese Keramikplatte durch kleine Flammen, die am Ende der Perforierung brennen, zum Glühen gebracht und wirkt als Heizstrahler. Auf diese Brenneranordnung ist als Brennraumbegrenzung ein Blechring, im folgenden Abgasring genannt, aufgesetzt, der sich auf mehreren, an der Brennkammer befestigten Federn abstützt und von diesen über einen Dichtungsring aus Feuerfestmaterial von unten gegen die Glaskeramikkochfläche gepreßt wird. Der Abgasring trägt einen Stabausdehnungsschalter zur Temperaturbegrenzung des Brenners und die erforderlichen Zünd- und Überwachungselektroden sowie eine Abgastülle. Letztere mündet in einen Abgaskanal aus Blech, der die Brennerabgase in die Warmhaltezone oder direkt aus der Mulde abführt. Die Warmhaltezone wird von den Abgasen eines oder mehrerer Kochstellenbrenner beheizt. Sie besteht aus einer oben offenen Blechwanne mit Dichtungsring und Anschlüssen für die Abgaskanäle sowie einem Abgasschacht. Die Blechwanne wird ebenfalls durch Federn gegen die Kochfläche gepreßt. Die Abgase werden über ein System von Leitblechen, die dazu dienen, die heißen Abgase mit der kühlen Umgebungsluft zu durchmischen, in den freien Raum geleitet.Each cooking zone of this hob is assigned a gas radiation burner, which consists of a gas mixing chamber with an externally attached venturi tube with a gas nozzle and a perforated ceramic plate that closes off the gas mixing chamber. DE-PS 26 33 849 describes this type of burner. In operation, this ceramic plate is made to glow by small flames that burn at the end of the perforation and acts as a radiant heater. A sheet metal ring, hereinafter referred to as the exhaust ring, is placed on this burner arrangement as a combustion chamber limitation, which is supported on several springs attached to the combustion chamber and is pressed by the latter against the glass ceramic cooking surface from below via a sealing ring made of refractory material. The exhaust ring carries a rod expansion switch to limit the temperature of the burner and the necessary ignition and monitoring electrodes as well as an exhaust nozzle. The latter opens into a sheet metal flue gas duct that discharges the burner flue gases into the warming zone or directly from the trough. The warming zone is heated by the exhaust gases from one or more hotplate burners. It consists of an open sheet metal trough with a sealing ring and connections for the exhaust gas ducts as well as an exhaust duct. The tray is also pressed against the cooking surface by springs. The exhaust gases are led into the free space via a system of baffles, which serve to mix the hot exhaust gases with the cool ambient air.

Alle drei Kochstellenbrenner sind voneinander vollkommen unabhängig und bestehen neben weiteren Einzelteilen aus den oben beschriebenen Hauptkomponenten.All three hotplate burners are completely independent of each other and, in addition to other individual parts, consist of the main components described above.

Die Brennstellen werden mit zugeordneten Ma-, gnetventilen gesteuert, die im Zuge der Gasleitungen im Muldenraum angeordnet sind. Für die temperaturempfindliche Steuer- und Überwachungselektronik ist ein getrenntes, wärmeisoliertes Gehäuse vorgesehen, das seitlich oder vorne an dem Kochfeld angebracht oder extern an anderer Stelle montiert ist.The burning points are controlled with assigned magnetic valves, which are arranged in the trough space in the course of the gas lines. A separate, heat-insulated housing is provided for the temperature-sensitive control and monitoring electronics, which is attached to the side or front of the hob or mounted externally elsewhere.

Die verschiedenen bekannten Kochfelder des vorstehend beschriebenen Typs sind jeweils aus ähnlichen Einzelkomponenten mit gleichartiger Funktion aufgebaut und weisen einen wesentlichen Nachteil insoweit auf, als die abgasführenden Teile aus Blech im Betrieb sehr heiß werden und so den Muldenraum, der die Brennstelle umgibt, aufheizen, so daß elektrische Leitungen und Hilfselemente, wie. beispielsweise Gassteuerventile, die im Muldenraum angeordnet sind, starken Temperaturbeanspruchungen unterliegen.The various known cooktops of the type described above are each constructed from similar individual components with a similar function and have a significant disadvantage insofar as the exhaust gas-carrying parts made of sheet metal become very hot during operation and thus heat up the trough space which surrounds the burning point, so that electrical lines and auxiliary elements, such as. For example, gas control valves, which are arranged in the trough space, are subject to severe temperature stresses.

Aufgabe der Erfindung ist es daher, ein Kochfeld der eingangs genannten Art für Gasbeheizung mit durchgehender Kochfläche aus Glaskeramik oder ähnlichem Material so auszubilden, daß eine unerwünschte und nachteilige Aufheizung des Muldenraumes vermieden wird, wobei das Kochfeld einfach und kostengünstig mit kleinem Montageaufwand hergestellt werden kann und das bei guter Wärmeisolation mechanisch stabil aufgebaut ist.The object of the invention is therefore to design a hob of the type mentioned for gas heating with a continuous cooking surface made of glass ceramic or similar material so that undesirable and disadvantageous heating of the trough space is avoided, the hob being simple and inexpensive to produce with little assembly effort and that is mechanically stable with good thermal insulation.

Diese Aufgabe wird erfindungsgemäß durch ein Kochfeld gemäß Patentanspruch 1 gelöst. Weitere Ausgestaltungen der Erfindung sind in den Unteransprüchen beschrieben.This object is achieved by a hob according to claim 1. Further refinements of the invention are described in the subclaims.

Zur Erläuterung der Erfindung dienen die Figuren 1-8, die die Vielfalt der möglichen Ausführungsformen wiedergeben. Die in den Figuren 1 bis 7 dargestellten Beispiele beziehen sich auf Kochfelder, die mit Gasstrahlungsbrennern beheizt werden. Eine Ausführungsform mit Beheizung durch atmosphärische Brenner ist in dem Beispiel gemäß Figur 8 dargestellt und weiter unten näher beschrieben.FIGS. 1-8 serve to explain the invention and reflect the variety of possible embodiments. The examples shown in Figures 1 to 7 relate to hobs that are heated with gas radiant burners. An embodiment with heating by atmospheric burners is shown in the example according to FIG. 8 and described in more detail below.

Hauptelement des mit Gas beheizten Kochfeldes mit durchgehender Kochfläche aus Glaskeramik oder ähnlichem Material ist ein massearmes Bauteil aus feuerfestem Werkstoff, vorzugsweise aus Aluminiumsilikatfaser mit einem anorganischen Bindemittel, in das alle Brennstellen sowie eine oder mehrere Warmhaltezonen des Kochfeldes mit ihren wesentlichen Komponenten eingeformt sind.The main element of the gas-heated hob with a continuous cooking surface made of glass ceramic or similar material is a low-mass component made of refractory material, preferably made of aluminum silicate fiber with an inorganic binder, into which all the burning points and one or more warming zones of the hob with their essential components are molded.

Ein solches Bauteil für Kochfelder mit drei Kochstellen, die mit Gasstrahlungsbrennem beheizt werden und die mit einer Warmhaltezone ausgerüstet sind, ist in Draufsicht in Figur 1 dargestellt ; Figur 2 zeigt einen Schnitt längs der Linie A-A in Figur 1 durch die rechte vordere Brennstelle 1 in diesem massearmen Bauteil 9 aus feuerfestem Werkstoff.Such a component for hobs with three hotplates, which are heated with gas radiant burners and which are equipped with a warming zone, is shown in plan view in FIG. 1; Figure 2 shows a section along the Line AA in Figure 1 through the right front focal point 1 in this low-mass component 9 made of refractory material.

In der Draufsicht (Figur 1) auf das Bauteil 9 erkennt man drei Brennstellen 1 mit kreisrunden, perforierten Düsenplatten 6 aus Keramik, wovon jeweils nur ein Viertel dargestellt ist. Diese Düsenplatten 6 trennen die Brennkammern 2 von den darunterliegenden Gasmischkammem 3 (Figur 2), die in Figur 1 nicht eingezeichnet sind. Von den Brennkammern 2 führen Abgaskanäle 5 zum Kochfeldzentrum. Dort ist für alle Brennstellen 1 ein gemeinsamer Zündbrenner 10 mit Zünd- und Überwachungseinrichtung 11 angeordnet, der später beschrieben wird. Die Abgaskanäle 5 leiten die Abgase vom Zentrum in eine Warmhaltezone 7 mit Abgasschacht bzw. Austrittskanal 8, durch den die Abgase aus der Kochmulde abgeführt werden. Zusätzlich sind in das Bauteil 9 Vertiefungen 12 eingeformt, in die die Temperaturbegrenzer 13, hier Stabausdehnungsschalter, passgenau eingelegt und dort dauerhaft fixiert werden können. Die elektrischen Versorgungsleitungen der Temperaturbegrenzer 13 wie auch anderer elektrischer Hilfselement, die in Figur 1 nicht dargestellt sind, etwa die Zuleitungen von Zünd- und Überwachungselektroden, können zweckmäßig aus stabilen Drähten hergestellt sein, die bei der Formung des Teils 9 mit in die Masse aus Feuerfestmaterial eingebettet werden und damit nach der Trocknung als zusätzliche Versteifung des Bauteiles 9 wirken. Weitere Einzelheiten des Bauteils 9 aus Feuerfestmaterial gehen aus der Schnittzeichnung in Figur 2 hervor. Dort sind der Deutlichkeit halber alle hinter der Brennstelle 1 in Figur 1 dargestellten Teile, wie beispielsweise die Warmhaltezone 7, nicht eingezeichnet.In the plan view (FIG. 1) of the component 9 one can see three focal points 1 with circular, perforated nozzle plates 6 made of ceramic, of which only a quarter is shown. These nozzle plates 6 separate the combustion chambers 2 from the gas mixing chambers 3 below (FIG. 2), which are not shown in FIG. 1. Exhaust ducts 5 lead from the combustion chambers 2 to the cooktop center. A common pilot burner 10 with an ignition and monitoring device 11 is arranged there for all the burning points 1 and will be described later. The exhaust gas ducts 5 guide the exhaust gases from the center into a warming zone 7 with an exhaust duct or outlet duct 8, through which the exhaust gases are discharged from the hob. In addition, recesses 12 are formed in the component 9, into which the temperature limiters 13, here rod expansion switches, can be inserted precisely and permanently fixed there. The electrical supply lines of the temperature limiter 13, as well as other electrical auxiliary elements, which are not shown in FIG. 1, for example the leads of ignition and monitoring electrodes, can expediently be made from stable wires which, when the part 9 is formed, are incorporated into the mass of refractory material be embedded and thus act as additional stiffening of the component 9 after drying. Further details of the component 9 made of refractory material can be seen from the sectional drawing in FIG. 2. For the sake of clarity, all the parts shown behind the burning point 1 in FIG. 1, such as, for example, the warming zone 7, are not shown.

An die Brennkammern 2 in Figur 2 ist die Gasmischkammer 3 der Brennstellen 1 mit der Gasmischeinrichtung 4 angeformt. Die Düsenplatte 6 ist ringsum auf einem Sitz 17 aufgelagert und mit (nicht dargestelltem) Klebstoff, vorzugsweise einem anorganischen feuerfesten Bindemittel in diesen Sitz 17 eingeklebt. Der Abgaskanal 5 ist mit einem getrennten Feuerfestteil (Abdeckung 15a) abgedeckt. Die Abdeckung 15a ist zweckmäßig aus demselben Material wie Teil 9 gefertigt und in dieses eingeklebt. Die Abdichtung der Brennkammer 2 zur Kochfläche 14 übernimmt eine weiche Dichtung 16 aus Aluminiumsilikatfaser.The gas mixing chamber 3 of the burning points 1 with the gas mixing device 4 is molded onto the combustion chambers 2 in FIG. The nozzle plate 6 is supported all around on a seat 17 and glued into this seat 17 with (not shown) adhesive, preferably an inorganic refractory binder. The exhaust duct 5 is covered with a separate refractory part (cover 15a). The cover 15a is advantageously made of the same material as part 9 and glued into this. The combustion chamber 2 is sealed off from the cooking surface 14 by a soft seal 16 made of aluminum silicate fiber.

Alle drei Brennstellen des Kochfeldes sind in derselben Weise aufgebaut und in das Bauteil 9 mit ihren Komponenten, wie Brennkammer 2, Gasmischkammer 3, Abgaskanal 5, Gasmischeinrichtung 4 zusammen mit der Warmhaltzone 7 und dem Abgasschacht 8 eingeformt.All three focal points of the hob are constructed in the same way and molded into component 9 with its components, such as combustion chamber 2, gas mixing chamber 3, exhaust duct 5, gas mixing device 4 together with the warming zone 7 and the exhaust duct 8.

Die gesamte Beheizungseinrichtung des Kochfeldes ist somit in einem einzigen, gut wärmeisolierenden Bauteil mit kleiner Bauhöhe dem Teil 9 zusammengefaßt, das mit bekannten Naßformtechniken für Silikatfasermaterialien preiswert hergestellt und mit minimalem Montageaufwand in das Kochfeld eingebaut werden kann. Mit passgenauen Aussparungen (Vertiefungen 12) im Teil 9 für die Temperaturbegrenzer 13 und mit eventuell zusätzlichen (nicht dargestellten) Aussparungen für die Zünd- und Überwachungseinrichtung 11 des zentralen Zündbrenners 10, können zusätzliche Justagearbeiten, wie sie bei den bekannten Kochfeldern erforderlich sind, weitgehend entfallen. Hinsichtlich der Plazierung der Gasmischeinrichtungen 4 in dem Bauteil 9 bestehen keine Beschränkungen, so daß sie zur weiteren Minderung des Montageaufwandes an die jeweils günstigsten Stellen im Bauteil 9 gelegt werden können. Ferner ist im Rahmen der (meist) vorgegebenen Abmessungen der Kochfläche 14 größtmögliche Freiheit in Bezug auf die Wahl der Kochstellendurchmesser und deren Lage in der Kochfläche gegeben.The entire heating device of the hob is thus combined in a single, good heat-insulating component with a small height, part 9, which can be inexpensively manufactured using known wet-molding techniques for silicate fiber materials and can be installed in the hob with minimal assembly effort. With precisely fitting recesses (recesses 12) in part 9 for the temperature limiters 13 and with possibly additional (not shown) recesses for the ignition and monitoring device 11 of the central pilot burner 10, additional adjustment work, as is required in the known cooktops, can largely be dispensed with . There are no restrictions with regard to the placement of the gas mixing devices 4 in the component 9, so that they can be placed in the most favorable places in the component 9 in order to further reduce the assembly effort. Furthermore, within the (mostly) given dimensions of the cooking surface 14, the greatest possible freedom is given with regard to the choice of the cooking surface diameter and its position in the cooking surface.

Die Gasmischeinrichtung 4 (Figur 2) bedarf noch einer Erläuterung: Die Kegelbohrung in Figur 2 wirkt zusammen mit der Gasdüse 30 als Injektor, wodurch die Verbrennungsluft angesaugt wird. Der notwendige Überdruck in der Gasmischkammer 3 wird durch die plötzliche Querschnittsänderung am Ende der Kegelbohrung auf den Querschnitt der Gasmischkammer 3 erreicht. Gleichzeitig wird das Gas durch Wirbelbildung mit der Verbrennungsluft gemischt. Mit einer Luftdrosselscheibe 32, die auf das Gewinde 31 der Gasdüse 30 aufgeschraubt ist, kann die Luftmenge eingestellt werden. Versuche haben gezeigt, daß die Brenner mit dieser einfachen Gasmischeinrichtung 4 gut arbeiten und insbesondere die Abgaszusammensetzung gemäß den Vorschriften gewährleistet ist.The gas mixing device 4 (FIG. 2) still requires an explanation: the conical bore in FIG. 2 acts together with the gas nozzle 30 as an injector, as a result of which the combustion air is sucked in. The necessary overpressure in the gas mixing chamber 3 is achieved by the sudden change in cross section at the end of the conical bore to the cross section of the gas mixing chamber 3. At the same time, the gas is mixed with the combustion air by vortex formation. The air quantity can be adjusted with an air throttle disk 32, which is screwed onto the thread 31 of the gas nozzle 30. Tests have shown that the burners work well with this simple gas mixing device 4 and in particular that the exhaust gas composition is guaranteed in accordance with the regulations.

Die Gasdüse 30 und die Luftdrosselscheibe 32 sind nicht in das Bauteil 9 integriert. Zweckmäßigerweise werden sie für alle Brenner zusammen mit den erforderlichen Gaszuleitungen und Gassteuerventilen in einer vorgefertigten Baueinheit zusammengefaßt.The gas nozzle 30 and the air throttle disk 32 are not integrated in the component 9. Appropriately, they are combined for all burners together with the necessary gas supply lines and gas control valves in a prefabricated unit.

Das Bauteil 9 kann in einem Stück hergestellt oder, falls es die angewandte Formungstechnologie verlangt, aus mehreren Teilen zusammengesetzt sein. Es kann beispielsweise durch eine Trennungsebene, die in Figur 3 mit der Linie E-E angedeutet ist, in ein Ober- und ein Unterteil aufgeteilt sein, die getrennt hergestellt werden und anschließend verklebt oder mechanisch zusammengepreßt werden.The component 9 can be produced in one piece or, if required by the molding technology used, can be composed of several parts. For example, it can be divided into an upper and a lower part by a parting line, which is indicated in FIG. 3 by the line E-E, which are produced separately and then glued or mechanically pressed together.

Die Figuren 3, 4 und 4a zeigen weitere Ausführungsformen der Kochmulde gemäß der Erfindung. Gleiche Bezugszeichen in diesen und allen weiteren Figuren bezeichnen Bauteile mit gleicher Funktion bzw. identische Bauteile. Bei der Ausführung gemäß Figur 3 sind die Abdeckungen 15a und die Dichtungen 16 (Figur 2) durch eine gemeinsame Abdeckplatte 15 ersetzt worden, die alle Abgaskanäle 5 (Figur 3) überdeckt und aus der die Öffnungen für die Brennkammern 2 der Kochstellenbrenner (Figur 1) und die Warmhaltezone 7 (Figur 1) ausgestanzt sind. Die Abdeckplatte 15 ist wie das Teil 9 beispielsweise aus Aluminiumsilikatfasermaterial mit einem anorganischen Bindemittel hergestellt. Sie kann an die Kochfläche 14 angeklebt sein. Das Bauteil 9 ist hier zweiteilig ausgeführt und wird durch das Oberteil 9a und das Unterteil 9b gebildet, deren Trennfläche durch die Linie E-E in Figur 3 angedeutet ist.Figures 3, 4 and 4a show further embodiments of the hob according to the invention. The same reference numerals in these and all other figures denote components with the same function or identical components. In the embodiment according to FIG. 3, the covers 15a and the seals 16 (FIG. 2) have been replaced by a common cover plate 15, which covers all the exhaust gas ducts 5 (FIG. 3) and from which the openings for the combustion chambers 2 of the hotplate burners (FIG. 1) and the warming zone 7 (FIG. 1) are punched out. Like part 9, cover plate 15 is made, for example, of aluminum silicate fiber material with an inorganic binder. It can be glued to the cooking surface 14. The component 9 is designed here in two parts and is through the upper part 9a and the lower part 9b are formed, the separating surface of which is indicated by the line EE in FIG.

Die Düsenplatte 6 aus einem speziellen Keramikmaterial wird in den dafür vorgesehenen Sitz 17, wie in Figur 3 links dargestellt, eingeklebt. Alternativ wird die Düsenplatte 6 aus Silikatfasermaterial hergestellt und in einem Arbeitsgang, beispielsweise wie in Fig. 3 rechts dargestellt, mit dem Oberteil 9a geformt. Im Gegensatz zu der oben beschriebenen Ausführung mit eingeklebter Düsenplatte (Figur 2) aus einer speziellen Keramikmasse ist hier die Düsenplatte Bestandteil des Bauteils 9, das durch Verkleben der Teile 9a und 9b in der Ebene E-E entsteht.The nozzle plate 6 made of a special ceramic material is glued into the seat 17 provided for this purpose, as shown on the left in FIG. Alternatively, the nozzle plate 6 is made of silicate fiber material and molded with the upper part 9a in one operation, for example as shown in FIG. 3 on the right. In contrast to the embodiment described above with a glued-in nozzle plate (FIG. 2) made of a special ceramic mass, the nozzle plate is here a component of component 9, which is created by gluing parts 9a and 9b in plane E-E.

Eine Lösung, bei der Oberteil 9a nicht mit dem Unterteil 9b verklebt ist, geht aus Figur 4 hervor. Die beiden Teile sind mit den Elementen einer Labyrinthdichtung 23 ausgerüstet und werden mit einer Andruckvorrichtung dicht gegeneinander gepreßt. Die übrigen Teile in Figur 4 entsprechen den Darstellungen in den Figuren 2 oder 3.A solution in which the upper part 9a is not glued to the lower part 9b is shown in FIG. The two parts are equipped with the elements of a labyrinth seal 23 and are pressed tightly against one another with a pressure device. The remaining parts in FIG. 4 correspond to the representations in FIGS. 2 or 3.

Aus Gründen der Festigkeit bestht häufig die Forderung, daß sich die Kochfläche 14 bei Stoßbelastungen in Richtung auf die Düsenplatte 6 hinbewegen, bzw. durchbiegen kann. Zur Erzeugung des nötigen Spielraumes werden die Labyrinthdichtungen 23, wie in Figur 4a dargestellt ist, mit einem Luftspalt 23a von 1,5 mm bis 2 mm Höhe ausgeführt.For reasons of strength, there is often the requirement that the cooking surface 14 can move or bend in the direction of the nozzle plate 6 during impact loads. To generate the necessary scope, the labyrinth seals 23, as shown in FIG. 4a, are designed with an air gap 23a of 1.5 mm to 2 mm in height.

Die Figuren 5 und 5a zeigen eine einfache und wartungsfreundliche Einrichtung zur Montage der kompletten Beheizungseinheit, die sich aus dem Bauteil 9 (Figur 2) und der Abdeckplatte 15 (Figur 3) zusammensetzt. Die genannten Teile sind in einen Hilfsrahmen 18 aus Stahlblech eingelegt, der mit Hebeln 19, wie sie in Figur 5a dargestellt sind, die Beheizungseinheit aus den Teilen 9 und 15 gegen die Kochfläche 14 preßt. Hierzu sind die Hebel 19 drehbar mit Nieten 22 an dem Kochflächenrahmen 21 befestigt, der wiederum über den Kleber 20 mit der Kochfläche 14 fest verbunden ist.FIGS. 5 and 5a show a simple and maintenance-friendly device for assembling the complete heating unit, which is composed of component 9 (FIG. 2) and cover plate 15 (FIG. 3). The parts mentioned are placed in an auxiliary frame 18 made of sheet steel, which presses the heating unit from parts 9 and 15 against the cooking surface 14 with levers 19, as shown in FIG. 5a. For this purpose, the levers 19 are rotatably fastened with rivets 22 to the cooking surface frame 21, which in turn is firmly connected to the cooking surface 14 via the adhesive 20.

Das oben beschriebene Bauteil 9 kann auch in Gemischtbauweise, wie aus Figur 6 hervorgeht, aus Feuerfestmaterial und Blech hergestellt werden. Zweckmäßig werden die Teile 9a und 15 aus Feuerfestmaterial (Figur 3), welche die Brennkammern 2 und die Abgaskanäle 5 sowie auch die Warmhaltezone 7 (Figur 1) begrenzen, beibehalten. Statt des Unterteils 9b (Figur 3) werden nun die Gasmischkammern 3 (Figur 6) mit einem umlaufenden Sitz 17, in den die Düsenplatten 6 eingeklebt werden können, in eine gemeinsame Blechwanne 9c eingeprägt. Falls erforderlich, können in die Blechwanne weitere Vertiefungen für den Bereich der Warmhaltezone 7 (Figur 1) und die Abgaskanalbereiche eingeprägt sein. Zusätzliche Sicken können zur Versteifung des Blechwanne 9c dienen. Die Teile 9a und 15 sind in die Wanne 9c eingelegt bzw. eingeklebt. Die Gasmischkammern 3 werden über angesetzte Mischeinrichtungen 4, beispielsweise Venturirohre, die teilweise in die Gasmischkammern hineinragen können, mit dem Gas-Luft-Gemisch versorgt.The component 9 described above can also be produced in a mixed construction, as shown in FIG. 6, from refractory material and sheet metal. The parts 9a and 15 made of refractory material (FIG. 3), which limit the combustion chambers 2 and the exhaust gas channels 5 and also the warming zone 7 (FIG. 1), are expediently retained. Instead of the lower part 9b (FIG. 3), the gas mixing chambers 3 (FIG. 6) with an all-round seat 17, into which the nozzle plates 6 can be glued, are stamped into a common sheet metal trough 9c. If necessary, further depressions for the area of the warming zone 7 (FIG. 1) and the exhaust duct areas can be embossed in the sheet metal trough. Additional beads can serve to stiffen the sheet pan 9c. The parts 9a and 15 are inserted or glued into the tub 9c. The gas mixing chambers 3 are supplied with the gas-air mixture via attached mixing devices 4, for example Venturi tubes, which can partially protrude into the gas mixing chambers.

Das Gewicht der Kochmulde kann weiter verringert werden, indem das gemeinsame Bauteil 9 für die Brennstellen 1 und die Warmhaltezone 7 (Figur 1) aus geschäumtem Alumium silikatmaterial mit einem Bindemittel hergestellt ist. Ist dieses Material offenporig, so ist eine zusätzliche Ab- - dichtung im Gasmischkammerbereich des Bauteils 9 erforderlich. Wie in Figur 7 dargestellt ist, kann diese Abdichtung dadurch erreicht werden, daß in das Bauteil 9 eine Gasmischkammer 3 als Blechtopf (Behälter 3a) eingesetzt ist. Der Blechtopf 3a wird zweckmäßig mit dem Bauteil 9 fest verklebt. Der Blechtopf 3a kann auch so angeordnet sein, daß er die in das Bauteil 9 eingeformte Gasmischkammer 3 außen umgibt. Alle weiteren Merkmale der Anordnung in Figur 7 entsprechen den Merkmalen der im Vorangegangenen beschriebenen Ausführungen.The weight of the hob can be further reduced by the common component 9 for the burners 1 and the warming zone 7 (Figure 1) made of foamed aluminum silicate material with a binder. If this material is open-pore, an additional seal is required in the gas mixing chamber area of component 9. As shown in FIG. 7, this seal can be achieved by inserting a gas mixing chamber 3 into the component 9 as a tin pot (container 3a). The tin pot 3a is expediently firmly glued to the component 9. The tin pot 3a can also be arranged such that it surrounds the gas mixing chamber 3 molded into the component 9 on the outside. All other features of the arrangement in FIG. 7 correspond to the features of the explanations described above.

In den oben genannten Beispielen sind die Kochstellenbrenner 1 (Figur 1) als Gasstrahlungsbrenner mit Mischkammer 3 und der Düsenplatte 6 ausgeführt. Wird das Bauteil 9 (Figur 2 oder 3) gemäß Figur 8 abgeändert, so können atmosphärische Brenner zur Kochstellenbeheizung verwendet werden. Die Brennkammer 2 in Figur 8 ist größer als in dem vorangegangenen Beispiel, und die Mischkammer entfällt. Die Brennerabgase des atmosphärischen Brenners 24 gelangen über einen ringförmigen Abgaskanal 5 am oberen Rande der Brennkammer 2, der mit der Abdeckplatte 15 abgedeckt ist, in ein Abgaskanalsystem, das beispielsweise entsprechend Figur 1 ausgeführt sein kann, und heizen die Warmhaltezone 7 (Figur 1). An den Abgasschacht 8 (Figur 1) der Warmhaltezone 7 wird zweckmäßig und in bekannter Weise ein Abgasgebläse angesetzt, das den Abgasstrom unterstützt und für die Zwangsbelüftung der Brennkammer 2 in Figur 8 durch die große Bodenöffnung 25 sorgt. Gezündet wird der Brenner 24 durch den Abgaskanal 5 über einen Zündbrenner im Kochfeldzentrum, der gemeinsam für alle Brennstellen des Kochfeldes dort vorgesehen ist (s. auch Figur 1). Von diesem Zündbrenner ist in Figur 8 nur ein Zündrohr 10b gezeigt. Werden die Kochstellenbrenner individuell gezündet und überwacht, so sind dafür anstelle des gemeinsamen Zündbrenners an dem jeweiligen Brenner 24 Zündelektroden 101 und Uberwachungsthermoelemente 111 in bekannter Weise angebracht. Diese Teile sind in Figur 8 gestrichelt angedeutet.In the examples mentioned above, the hotplate burner 1 (FIG. 1) is designed as a gas radiation burner with a mixing chamber 3 and the nozzle plate 6. If component 9 (FIG. 2 or 3) is modified in accordance with FIG. 8, atmospheric burners can be used for heating the hotplate. The combustion chamber 2 in FIG. 8 is larger than in the previous example, and the mixing chamber is omitted. The burner exhaust gases from the atmospheric burner 24 pass through an annular exhaust gas duct 5 at the upper edge of the combustion chamber 2, which is covered with the cover plate 15, into an exhaust gas duct system, which can be designed, for example, according to FIG. 1, and heat the warming zone 7 (FIG. 1). At the exhaust duct 8 (FIG. 1) of the warming zone 7, an exhaust gas blower is expediently and in a known manner attached, which supports the exhaust gas flow and ensures the forced ventilation of the combustion chamber 2 in FIG. 8 through the large bottom opening 25. The burner 24 is ignited through the exhaust gas duct 5 via a pilot burner in the cooktop center, which is provided there jointly for all the burners in the cooktop (see also FIG. 1). Only one pilot tube 10b of this pilot burner is shown in FIG. If the hotplate burners are ignited and monitored individually, 24 ignition electrodes 101 and monitoring thermocouples 111 are attached to the respective burner in a known manner instead of the common pilot burner. These parts are indicated by dashed lines in FIG.

Claims (18)

1. Cooking surface with a continuous cooking area of glass ceramic or comparable material, several gas-heated combustion points and exhaust-gas channels for removing the combustion gases, the combustion points and the exhaust-gas channels being arranged below the cooking area so that they form cooking zones, which are separated from each other, and at least one hot holding zone in the cooking area, characterized in that the essential components of the combustion points (1) and the exhaust-gas channels (5) are moulded into a structural part (9) of a low- mass and thermally insulating material, arranged beneath the cooking area, and are enclosed in a thermally insulated manner in said structural part in the regions which are not used for heat transmission to the cooking zones and the hot holding zone.
2. Cooking surface according to Claim 1, characterized in that the structural part (9) is composed of an upper section (9a) and a lower section (9b) of the same material, the separating. plane E-E being situated parallel to the surface of the upper section (9) and the two parts (9a and 9b) being bonded to each other after their separate manufacture and/or being joined to each other in a gas-tight manner in the cooking area by pressure.
3. Cooking surface according to Claim 1 or 2, characterized in that the structural part (9) or its part (9a and 9b) is composed of temperature- resistant and thermally insulating, compacted fibre material or materials with large pore volume.
4. Cooking surface according to one of Claims 1 to 3, characterized in that the exhaust-gas channels (5) of the combustion points (1), moulded into the structural part (9), open into a common hot holding zone (7) which is in turn moulded into the structural part (9) and is provided with an outlet channel (8).
5. Cooking surface according to one of Claims 1 to 4, characterized in that at least two gas mixing chambers (3) of the combustion points (1) are moulded into a common metal-sheet trough (9c) and the gas mixing chambers (3) are joined firmly and in a gas-tight manner to the associated gas-air mixing devices (4).
6. Cooking surface according to Claim 5, characterized in that the gas-air mixing device (4) is a venturi tube which partially projects into the gas-mixing chamber (3).
7. Cooking surface according to Claim 1 or 2, characterized in that metallic containers (3a) are let into the lower section (9b) in preformed recesses as gas mixing chambers (3), or gas mixing chambers (3) moulded in the lower section (9b) are surrounded by a metallic container (3a).
8. Cooking surface according to one of Claims 1 to 7, characterized in that a jet plate (6) composed of ceramic material is arranged between the combustion chambers (2) and the gas mixing chambers (3).
9. Cooking surface according to Claim 8, characterized in that the jet plate (6) is bonded into the seating (17) provided for this purpose in structural part 9 or 9b, or is bonded onto the metallic mixing chamber (metal-sheet trough 9c) with a heat-resistant adhesive.
10. Cooking surface according to Claim 9, characterized in that the jetplate (6) is clamped mechanically by devices onto the gas mixing chambers (metal-sheet trough 9c or container 3a) with the insertion of heat-resistant sealing rings.
11. Cooking surface according to Claim 1 or 2, characterized in that the upper section (9a) and the lower section (9b) are provided with the components of a labyrinth seal (23) which seal the combustion chambers (2) when the parts (9a) and (9b) are mechanically pressed onto each other.
12. Cooking surface according to Claim 11, characterized in that the labyrinth seal (23) is provided with an airgap (23a).
13. Cooking surface according to Claim 1 or 2, characterized in that recesses (12) into which the electrical or electromechanical operating and monitoring components (13) can be inserted as an exact fit and fixed in position, are incorporated in the structural part (9).
14. Cooking surface according to Claim 13, characterized in that the electrical leads to the operating and monitoring components, for example the temperature limiters (13), are composed of rigid wires which are introduced into the structural part (9) during its production and are at the same time reinforcing components of the structural part (9).
15. Cooking surface according to one of Claims 1, 2, 5 or 7, characterized in that the exhaust-gas channels (5) are covered by a coverplate (15) and in that the coverplate (15), the structural part (9) or the bonded-together structural parts (upper section 9a and lower section 9b) together with the coverplate (15) or the upper section (9a) with the sheet-metal trough (9c) and the coverplate (15) are pressed against the cooking area (14) by means of an auxiliary frame (18) or appropriate rails, the auxiliary frame (18) resting against pressure or rocking devices (19) arranged on the cooking area frame (21).
16. Cooking surface according to Claim 15, characterized in that the pressure or locking devices (19) are rotatably attached to the cooking area frame (21) by means of rivets (22).
17. Cooking surface according to Claim 15, characterized in that the pressure or locking devices (19) are spring components which, after the auxiliary frame (18) has been pressed in, spring out and clamp the auxiliary frame with the structural part (9) and the coverplate, (15) against the cooking area (14).
EP84104375A 1983-04-30 1984-04-18 Cooker hob with gas heated hot plates and a continuous cooking area of glass-ceramic or similar material Expired EP0124022B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84104375T ATE43897T1 (en) 1983-04-30 1984-04-18 HOB WITH GAS-HEATED BURNERS AND A CONTINUOUS COOKING SURFACE MADE OF GLASS-CERAMIC OR SIMILAR MATERIAL.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3315745 1983-04-30
DE19833315745 DE3315745C2 (en) 1983-04-30 1983-04-30 Hob with gas-heated burners and a continuous cooking surface made of glass ceramic or comparable material
DE19843409334 DE3409334A1 (en) 1984-03-14 1984-03-14 Cooking area with gas-heated burners and a continuous cooking surface made of glass ceramic or comparable material
DE3409334 1984-03-14

Publications (3)

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EP0124022A2 EP0124022A2 (en) 1984-11-07
EP0124022A3 EP0124022A3 (en) 1986-04-30
EP0124022B1 true EP0124022B1 (en) 1989-06-07

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EP84104375A Expired EP0124022B1 (en) 1983-04-30 1984-04-18 Cooker hob with gas heated hot plates and a continuous cooking area of glass-ceramic or similar material

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EP (1) EP0124022B1 (en)

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US4580550A (en) 1986-04-08
EP0124022A3 (en) 1986-04-30
EP0124022A2 (en) 1984-11-07

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