EP0173066B1 - Apparatus for heat-processing food - Google Patents

Apparatus for heat-processing food Download PDF

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Publication number
EP0173066B1
EP0173066B1 EP85109048A EP85109048A EP0173066B1 EP 0173066 B1 EP0173066 B1 EP 0173066B1 EP 85109048 A EP85109048 A EP 85109048A EP 85109048 A EP85109048 A EP 85109048A EP 0173066 B1 EP0173066 B1 EP 0173066B1
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EP
European Patent Office
Prior art keywords
boiler
line
cooking chamber
water
leads
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
EP85109048A
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German (de)
French (fr)
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EP0173066A1 (en
Inventor
Siegfried Meister
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LechMetall Landsberg GmbH
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LechMetall Landsberg GmbH
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Publication date
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Priority to AT85109048T priority Critical patent/ATE43055T1/en
Publication of EP0173066A1 publication Critical patent/EP0173066A1/en
Application granted granted Critical
Publication of EP0173066B1 publication Critical patent/EP0173066B1/en
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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
    • F24C15/00—Details
    • F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
    • F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation
    • F24C15/327—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation with air moisturising

Definitions

  • the invention relates to a device for the heat treatment of food with a cooking space delimited by partition walls, a floor and a ceiling, into which a water line provided with spray cans and having a valve leads, as is known from US Pat. No. 3,672,908.
  • the spray nozzles are aligned directly with the food to be heat-treated and serve to cool it continuously by feeding cold water.
  • the invention has for its object to provide a device for the heat treatment of food, which in addition to the operation with circulated hot air also enables steam operation, the changeover from hot air to steam operation being effected without unnecessary energy loss.
  • this object is achieved in that the spray nozzles are directed towards the boundary walls or the ceilings and in that a boiler arranged outside the cooking space and a steam supply pipe leading from the boiler into the cooking space are provided.
  • a preferred embodiment of the invention is characterized in that the steam supply pipe opens into the anteroom above the fan.
  • a device 1 for heat treatment of dishes or food to be cooked is shown and described in general.
  • the device 1 has a cooking space 12 which is accessible by means of a cooking space door 10.
  • Food or other food to be cooked can be placed in the oven 12 on so-called tray racks for heat treatment.
  • the display fields 17, 18, 19 Arranged behind the display fields 17, 18, 19 are lamps or light-emitting diodes which light up in a manner to be explained in certain operating phases of the device 1.
  • An operating part of the device 1 is accommodated at the rear of the operating elements and the part 13 of the front side 14 of the device 1 which adjoins the cooking chamber door 10.
  • the operating part has a boiler 24 behind a partition 22 (see FIG. 2), in which a boiler heater 26 is arranged.
  • a steam supply pipe 28 leads from the upper part of the boiler 24 through the partition 22 into the interior of an anteroom 30, which has a blower 32 and an electric heater or heating spiral 34 surrounding the blower.
  • the anteroom 30 is delimited by a sheet metal wall 36 which, moreover, represents an installation in the sense described above, which is arranged at a distance from the side walls, that is to say the floor 38 and the ceiling 40 of the cooking chamber 12, and which also has a central suction opening 42.
  • a steam supply pipe 28 opens into the anteroom 30 above the blower 32 and the heater 34.
  • a temperature sensor 44 is attached to the ceiling 40 in the anteroom 30 below the ceiling 40 of the cooking space 12.
  • the water level switch 46 consists of an elongated tube 48, the longitudinal direction of which extends perpendicular to the water surface 47 of the water 49 contained in the boiler 24.
  • the tube 48 In the tube 48 is an upper reed contact, which is approximately at the highest desired water level in the boiler 24, in a manner not shown.
  • a lower reed contact In the tube 48, a lower reed contact is also attached at a height below which the water surface 47 increases. would put the boiler heater 26 in operation at risk due to a lack of sufficient water level in the boiler 24.
  • a float 50 rides along the tube 48, which can consist, for example, of a hollow ball which is axially penetrated by a tube comprising the tube 48.
  • a permanent magnet of such strength is fastened in the float 50 that its field strength opens one of the two reed contacts when the float is opposite the respective reed contact on the tube 48.
  • the two poles of the lower and upper reed contact are connected to the controller 60 of the device 1 via an electrical line 52.
  • the control circuit 60 supplies the boiler heater 26 with the required current via a supply line 61 and a further line 62.
  • Another two-wire line 54 leads from the controller 60 to the lamp arranged behind the field 18.
  • Another electrical two-wire line 56 leads from the controller 60 to the lamp arranged behind the field 17.
  • a two-wire line 58 leads from the controller 60 to the temperature sensor 44.
  • spray nozzles 64, 66, 68, 70 are attached to the ceiling of the cooking chamber 12 and the anteroom 30 and are connected to a common water line 72.
  • the water line 72 contains a valve 74 actuated by a solenoid coil 78, which is connected to a water supply line 76 on the upstream side.
  • the magnet coil 78 is connected to the controller 60 via a control line 82.
  • the spray nozzles 64, 66, 68, 70 are on the walls 22 and 36 and 41 and 43 and the ceiling 40 of the cooking space directed and sprinkle this with the valve open with water led out of line 76. They form the spray device of the device 1, designated as a whole by 96.
  • FIG. 3 shows a section of the control 60.
  • device 1 When device 1 is connected to a power supply, there is an electrical voltage between electrical lines 80 and 90.
  • the door switch T is closed. If the selector switch 16 is also in the "damper" mode, the switch 17 is also closed.
  • the further operation of the device 1 or the damper then depends on the position of the switching arm 83 of the temperature sensor 44. If the temperature detected by the temperature sensor 44 is below, for example, 110 ° C., the switching arm 83 assumes the position shown in FIG. 3, in which it conductively connects the electrical line 84 to the line 80 (the switches T and 17 are closed ).
  • the upper reed contact is designated in FIG. 3 with OR and the lower reed contact with UR.
  • the solenoid valve B1 is opened via the work contact K6 of the relay K6 which is de-energized when the OR is open, so that the water supply is interrupted.
  • the UR is closed, the line 85 is connected to 87 via the relay K5, so that the relay K3 has current flowing through it and the normally open contact K3 closes, as a result of which the boiler heater 26 receives current via line 84 and 90. Thereupon, electricity is generated in the boiler 24.
  • the line 84 carries a voltage to a flasher unit K8 which gives the flashing light 92, which is arranged behind the window 18, with optical flashing signals.
  • a symbol can be printed on the window 18 which indicates the lack of water. In this way it is prevented that the boiler heater 26 "goes dry” and is thereby damaged, so that it is no longer steamed.
  • the device 1 takes on a different operating phase if, when the switches T and 17 are closed, the temperature sensor 44 detects a temperature above approximately 110 ° C. in the cooking space.
  • the switching arm 83 connects the line 80 to the line 86. Via line 86, voltage then reaches the flasher unit K9, which causes the lamp 94 arranged behind the field 17 to flash.
  • a symbol can be printed on the field 17, which is understood as a warning of the introduction of food into the cooking space 12 because the temperature is too high there.
  • the spray device 96 receives power via line 86, i.e. the controller 60 gives a signal actuating the coil 78 via the control line 82, so that the valve 74 opens and the walls of the cooking chamber 12 mentioned are irrigated.
  • the controller 60 gives a signal actuating the coil 78 via the control line 82, so that the valve 74 opens and the walls of the cooking chamber 12 mentioned are irrigated.
  • the "combi-steamer" operating mode is not shown, in which the food in the cooking space is treated with both steam and hot air. It is within the scope of the invention described here to additionally connect the water level switch 46 to a further control circuit which triggers the "combi-steaming" operating mode. This ensures that the insufficient water level is always displayed when steam is to be generated in the boiler 24, whether for pure steaming mode or for the "combi-steaming" operating mode.
  • such a device 1 designed according to the invention can be operated in a method in which the heated cooking chamber 12 is at least partially actively cooled before the introduction of new food, namely by the automatic actuation of the spray device 96 at temperatures in the cooking chamber 12 above about 110 ° C.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Commercial Cooking Devices (AREA)
  • Cookers (AREA)
  • General Preparation And Processing Of Foods (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zur Wärmebehandlung von Speisen mit einem durch Begrenzungswände, einem Boden und einer Decke begrenzten Garraum, in den eine mit Sprühdosen versehene und ein Ventil aufweisende Wasserleitung führt, wie sie aus der US-A 3 672 908 bekannt ist.The invention relates to a device for the heat treatment of food with a cooking space delimited by partition walls, a floor and a ceiling, into which a water line provided with spray cans and having a valve leads, as is known from US Pat. No. 3,672,908.

Bei der vorbekannten Vorrichtung sind die Sprühdüsen direkt auf die wärmezubehandelnde Speise ausgerichtet und dienen dazu, diese durch Aufgabe von kaltem Wasser ständig zu kühlen.In the previously known device, the spray nozzles are aligned directly with the food to be heat-treated and serve to cool it continuously by feeding cold water.

Weiter wird auf die DE-U 8131 827 hingewiesen.Reference is also made to DE-U 8131 827.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zur Wärmebehandlung von Speisen zu schaffen, die neben dem Betrieb mit umgewälzter Heißluft auch einen Dampfbetrieb ermöglicht, wobei die Umschaltung von Heißluft- auf Dampfbetrieb ohne unnötigen Energieverlust bewirkt wird.The invention has for its object to provide a device for the heat treatment of food, which in addition to the operation with circulated hot air also enables steam operation, the changeover from hot air to steam operation being effected without unnecessary energy loss.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß die Sprühdüsen auf die Begrenzungswände bzw. die Decken gerichtet sind und daß ein außerhalb des Garraumes angeordneter Boiler und ein von dem Boiler in den Garraum führendes Dampfzufuhrrohr vorgesehen sind.According to the invention, this object is achieved in that the spray nozzles are directed towards the boundary walls or the ceilings and in that a boiler arranged outside the cooking space and a steam supply pipe leading from the boiler into the cooking space are provided.

Weiter wird die Vorsehung eines in einem an den Garraum angrenzenden Vorraum angeordnetes Gebläse vorgeschlagen.Furthermore, the provision of a fan arranged in an antechamber adjacent to the cooking space is proposed.

Ein bevorzugtes Ausführungsbeispiel der Erfindung zeichnet sich dadurch aus, daß das Dampfzufuhrrohr oberhalb des Gebläses in den Vorraum mündet.A preferred embodiment of the invention is characterized in that the steam supply pipe opens into the anteroom above the fan.

Die Erfindung wird im folgenden anhand einer Zeichnung erläutert. Dabei zeigt:

  • Fig. 1 eine schematische perspektivische Darstellung einer mit den Merkmalen der Erfindung ausgerüsteten Vorrichtung;
  • Fig. 2 eine schematische Darstellung des Garraumes gern. Fig. 1 und
  • Fig. 3 ein Schaltungsdiagramm aus der Steuerung der Vorrichtung gern. Fig. 1.
The invention is explained below with reference to a drawing. It shows:
  • Figure 1 is a schematic perspective view of a device equipped with the features of the invention.
  • Fig. 2 likes a schematic representation of the cooking space. Fig. 1 and
  • Fig. 3 is a circuit diagram from the control of the device like. Fig. 1.

Dargestellt und beschrieben ist eine Vorrichtung 1 zur Wärmebehandlung von Speisen bzw. Gargut allgemein. Wie in Fig. 1 zu erkennen ist, weist die Vorrichtung 1 einen Garraum 12 auf, der mittels einer Garraumtür 10 zugänglich ist. In dem Garraum 12 können Speisen oder sonstiges Gargut auf sogenannten Hordengestellen zur Wärmebehandlung eingebracht werden. Seitlich zu der Garraumtür 10 sind auf der Vorderseite 14 der dargestellten Vorrichtung 1, die auch als Combi-Dämpfer bezeichnet werden kann, mehrere Bedienungsorgane und Anzeigefelder vorgesehen, von denen der Betriebsart-Wahlschalter 16 besonders bezeichnet ist. Hinter den Anzeigefeldern 17, 18, 19 sind Lampen bzw. Leuchtdioden angeordnet, die bei bestimmten Betriebsphasen der Vorrichtung 1 in noch zu erläuternder Weise aufleuchten. Rückwärtig zu den Bedienungsorganen und dem bis zur Garraumtür 10 anschließenden Teil 13 der Vorderseite 14 der Vorrichtung 1 ist ein Betriebsteil der Vorrichtung 1 untergebracht.A device 1 for heat treatment of dishes or food to be cooked is shown and described in general. As can be seen in FIG. 1, the device 1 has a cooking space 12 which is accessible by means of a cooking space door 10. Food or other food to be cooked can be placed in the oven 12 on so-called tray racks for heat treatment. To the side of the cooking chamber door 10, on the front side 14 of the device 1 shown, which can also be referred to as a combi steamer, there are several operating elements and display fields, of which the operating mode selector switch 16 is particularly designated. Arranged behind the display fields 17, 18, 19 are lamps or light-emitting diodes which light up in a manner to be explained in certain operating phases of the device 1. An operating part of the device 1 is accommodated at the rear of the operating elements and the part 13 of the front side 14 of the device 1 which adjoins the cooking chamber door 10.

Der Betriebsteil weist hinter einer Trennwand 22 (vgl. Fig. 2) einen Boiler 24 auf, in welchem eine Boilerheizung 26 angeordnet ist. Vom oberen Teil des Boilers 24 führt ein Dampfzufuhrrohr 28 durch die Trennwand 22 in das Innere eines Vorraumes 30, der ein Gebläse 32 sowie eine das Gebläse umgebende elektrische Heizung bzw. Heizspirale 34 aufweist. Zum Garraum 12 hin ist der Vorraum 30 durch eine Blechwand 36 abgegrenzt, die im übrigen einen Einbau in dem weiter oben bezeichneten Sinne darstellt, die zu den Seitenwänden, also zum Boden 38 und zur Decke 40 des Garraumes 12 hin mit Abstand angeordnet ist, und die weiterhin eine mittige Ansaugöffnung 42 aufweist.The operating part has a boiler 24 behind a partition 22 (see FIG. 2), in which a boiler heater 26 is arranged. A steam supply pipe 28 leads from the upper part of the boiler 24 through the partition 22 into the interior of an anteroom 30, which has a blower 32 and an electric heater or heating spiral 34 surrounding the blower. Towards the cooking chamber 12, the anteroom 30 is delimited by a sheet metal wall 36 which, moreover, represents an installation in the sense described above, which is arranged at a distance from the side walls, that is to say the floor 38 and the ceiling 40 of the cooking chamber 12, and which also has a central suction opening 42.

Ein Dampfzufuhrrohr 28 mündet oberhalb des Gebläses 32 und der Heizung 34 in den Vorraum 30.A steam supply pipe 28 opens into the anteroom 30 above the blower 32 and the heater 34.

Unterhalb der Decke 40 des Garraumes 12 ist im Vorraum 30 ein Temperaturfühler 44 an der Decke 40 befestigt.A temperature sensor 44 is attached to the ceiling 40 in the anteroom 30 below the ceiling 40 of the cooking space 12.

In dem Boiler 24 ist weiterhin ein im Ganzen mit 46 bezeichneter Wasserstands-Schalter befestigt. Der Wasserstands-Schalter 46 besteht aus einem langgestreckten Rohr 48, dessen Längsrichtung sich senkrecht zur Wasseroberfläche 47 des im Boiler 24 enthaltenen Wassers 49 erstreckt. In dem Rohr 48 ist in nicht dargestellter Weise ein oberer Reed-Kontakt der etwa bei dem höchsten im Boiler 24 erwünschten Wasserstand liegt. In dem Rohr 48 ist ferner ein unterer Reed-Kontakt in einer Höhe befestigt, deren Unterschreiten durch die Wasseroberfläche 47 zu. einer Gefährdung der in Betrieb befindlichen Boilerheizung 26 mangels ausreichendem Wasserstand im Boiler 24 führen würde.In the boiler 24, a water level switch designated as a whole is also fastened. The water level switch 46 consists of an elongated tube 48, the longitudinal direction of which extends perpendicular to the water surface 47 of the water 49 contained in the boiler 24. In the tube 48 is an upper reed contact, which is approximately at the highest desired water level in the boiler 24, in a manner not shown. In the tube 48, a lower reed contact is also attached at a height below which the water surface 47 increases. would put the boiler heater 26 in operation at risk due to a lack of sufficient water level in the boiler 24.

Längs des Rohres 48 reitet ein Schwimmer 50, der bspw. aus einer Hohlkugel bestehen kann, welche von einem das Rohr 48 umfassenden Rohr axial durchsetzt ist. In dem Schwimmer 50 ist ein Dauermagnet von solcher Stärke befestigt, daß dessen Feldstärke einen der beiden Reed-Kontakte öffnet, wenn sich der Schwimmer dem jeweiligen Reed-Kontakt gegenüber am Rohr 48 befindet. Die beiden Pole des unteren und oberen Reed-Kontaktes sind über eine elektrische Leitung 52 mit der Steuerung 60 der Vorrichtung 1 verbunden. Die Steuerschaltung 60 versorgt über eine Zuleitung 61 und eine weitere Leitung 62 die Boiler-Heizung 26 mit dem erforderlichen Strom. Eine weitere zweiadrige Leitung 54 führt von der Steuerung 60 zu der hinter dem Feld 18 angeordneten Leuchte. Eine andere elektrische zweiadrige Leitung 56 führt von der Steuerung 60 zu der hinter dem Feld 17 angeordneten Leuchte. Darüber hinaus führt noch eine zweiadrige Leitung 58 aus der Steuerung 60 zu dem Temperaturfühler 44.A float 50 rides along the tube 48, which can consist, for example, of a hollow ball which is axially penetrated by a tube comprising the tube 48. A permanent magnet of such strength is fastened in the float 50 that its field strength opens one of the two reed contacts when the float is opposite the respective reed contact on the tube 48. The two poles of the lower and upper reed contact are connected to the controller 60 of the device 1 via an electrical line 52. The control circuit 60 supplies the boiler heater 26 with the required current via a supply line 61 and a further line 62. Another two-wire line 54 leads from the controller 60 to the lamp arranged behind the field 18. Another electrical two-wire line 56 leads from the controller 60 to the lamp arranged behind the field 17. In addition, a two-wire line 58 leads from the controller 60 to the temperature sensor 44.

In der Decke des Garraumes 12 sowie des Vorraumes 30 sind bei dem Ausführungsbeispiel gemäß Fig. 2 mehrere Sprühdüsen 64, 66, 68, 70 befestigt, die an eine gemeinsame Wasserleitung 72 angeschlossen sind. Die Wasserleitung 72 enthält ein von einer Magnetspule 78 betätigtes Ventil 74, das auf der Aufstromseite mit einer Wasserzulaufleitung 76 verbunden ist. Die Magnetspule 78 ist über eine Steuerleitung 82 mit der Steuerung 60 verbunden. Die Sprühdüsen 64, 66, 68, 70 sind auf die Wände 22 sowie 36 und 41 und 43 sowie die Decke 40 des Garraumes gerichtet und beregnen diese bei geöffnetem Ventil mit aus der Leitung 76 herausgeführtem Wasser. Sie bilden die als Ganzes mit 96 bezeichnete Sprüheinrichtung der Vorrichtung 1.In the embodiment according to FIG. 2, several spray nozzles 64, 66, 68, 70 are attached to the ceiling of the cooking chamber 12 and the anteroom 30 and are connected to a common water line 72. The water line 72 contains a valve 74 actuated by a solenoid coil 78, which is connected to a water supply line 76 on the upstream side. The magnet coil 78 is connected to the controller 60 via a control line 82. The spray nozzles 64, 66, 68, 70 are on the walls 22 and 36 and 41 and 43 and the ceiling 40 of the cooking space directed and sprinkle this with the valve open with water led out of line 76. They form the spray device of the device 1, designated as a whole by 96.

Die Betriebsweise des in Fig. 2 dargestellten Ausführungsbeispieles, die jedoch im Prinzip in gleicher Weise bei den noch weiter unten geschilderten Ausführungsbeispielen verwirklichbar ist, sei anhand des in Fig. 3 dargestellten Schaltungsdiagramms erläutert, das einen Ausschnitt aus der Steuerung 60 wiedergibt. Bei an eine Stromversorgung angeschlossener Vorrichtung 1 besteht zwischen den elektrischen Leitungen 80 und 90 eine elektrische Spannung. Wenn die Garraumtür 10, wie in Fig. 1 dargestellt, geschlossen ist, ist der Türschalter T geschlossen. Wenn weiter auch der Wählschalter 16 auf der Betriebsart "Dämpfer" steht, ist gleichfalls der Schalter 17 geschlossen. Der weitere Betrieb der Vorrichtung 1 bzw. des Dämpfers hängt dann von der Stellung des Schaltarmes 83 des Temperaturfühlers 44 ab. Wenn die vom Temperaturfühler 44 erfaßte Temperatur unterhalb von bspw. 110°C liegt, nimmt der Schaltarm 83 die in Fig. 3 dargestellte Stellung ein, bei der er die elektrische Leitung 84 mit der Leitung 80 leitend verbindet (die Schalter T und 17 sind geschlossen).The mode of operation of the exemplary embodiment shown in FIG. 2, which, however, can in principle be implemented in the same way in the exemplary embodiments described below, is explained with reference to the circuit diagram shown in FIG. 3, which shows a section of the control 60. When device 1 is connected to a power supply, there is an electrical voltage between electrical lines 80 and 90. When the cooking chamber door 10 is closed, as shown in FIG. 1, the door switch T is closed. If the selector switch 16 is also in the "damper" mode, the switch 17 is also closed. The further operation of the device 1 or the damper then depends on the position of the switching arm 83 of the temperature sensor 44. If the temperature detected by the temperature sensor 44 is below, for example, 110 ° C., the switching arm 83 assumes the position shown in FIG. 3, in which it conductively connects the electrical line 84 to the line 80 (the switches T and 17 are closed ).

Es sei angenommen, daß sich im Boiler 24 soviel Wasser 49 befindet, daß der Schwimmer 50 sich zwischen oberem und unterem Reed-Kontakt befindet, also beide Reed-Kontakte geschlossen sind. Der obere Reed-Kontakt ist in Fig. 3 mit OR und der untere Reed-Kontakt mit UR bezeichnet. Über den Arbeits-Kontakt K6 des bei geöffnetem OR stromlosen Relais K6 wird das Magnetventil B1 geöffnet, so daß die Wasserzufuhr unterbrochen wird. Bei geschlossenem UR wird über das Relais K5 die Leitung 85 mit 87 verbunden, so daß das Relais K3 stromdurchflossen ist und der Arbeitskontakt K3 schließt, wodurch die Boiler-Heizung 26 über die Leitung 84 und 90 Strom erhält. Daraufhin wird im Boiler 24 Strom erzeugt.It is assumed that there is so much water 49 in the boiler 24 that the float 50 is between the upper and lower reed contacts, that is to say both reed contacts are closed. The upper reed contact is designated in FIG. 3 with OR and the lower reed contact with UR. The solenoid valve B1 is opened via the work contact K6 of the relay K6 which is de-energized when the OR is open, so that the water supply is interrupted. When the UR is closed, the line 85 is connected to 87 via the relay K5, so that the relay K3 has current flowing through it and the normally open contact K3 closes, as a result of which the boiler heater 26 receives current via line 84 and 90. Thereupon, electricity is generated in the boiler 24.

Liegt im Wasserzulauf des Boilers 24 eine Störung etwa dergestalt vor, daß der Wasserhahn des Wasserzulaufs geschlossen ist, der Boiler 24 trotz geöffnetem Ventil B1 also keinen Wassernachschub erhält, sinkt bei fortgesetzter Dampferzeugung der Wasserspiegel 47 soweit ab, bis der Schwimmer 50 den unteren Reed-Kontakt UR öffnet. Daraufhin wird das Relais K5 spannungslos, so daß der Schaltarm 85 des Umschalters K5 die Leitung 84 nunmehr mit der Leitung 89 verbindet. Bei dann stromlosem Relais K3 fällt der Arbeits- kontakt K3 ab, so daß die Boiler-Heizung 26 keinen Strom mehr erhält. Die Leitung 84 führt bei der zuletzt beschriebenen Stellung des Schaltarms 85 über die Leitung 89 eine Spannung an einen Blinkgeber K8, der der nachgeschalteten Leuchte 92, die hinter dem Fenster 18 angeordnet ist, optische Blinkzeichen gibt. Auf dem Fenster 18 kann ein Symbol aufgedruckt sein, das den Wassermangel anzeigt. Auf diese Weise wird verhindert, daß die Boiler-Heizung 26 "Trocken geht" und dadurch Schaden nimmt, so daß dann nicht mehr gedämpft wird.If there is a malfunction in the water supply to the boiler 24 such that the tap of the water supply is closed, so that the boiler 24 does not receive any water replenishment despite the valve B1 being open, the water level 47 drops as steam continues until the float 50 stops the lower reed Contact UR opens. Thereupon, the relay K5 is de-energized, so that the switching arm 85 of the switch K5 now connects the line 84 to the line 89. When the relay K3 is then de-energized, the working contact K3 drops out, so that the boiler heater 26 no longer receives any current. When the switching arm 85 is in the position described last, the line 84 carries a voltage to a flasher unit K8 which gives the flashing light 92, which is arranged behind the window 18, with optical flashing signals. A symbol can be printed on the window 18 which indicates the lack of water. In this way it is prevented that the boiler heater 26 "goes dry" and is thereby damaged, so that it is no longer steamed.

Die Vorrichtung 1 nimmt eine andere Betriebsphase ein, wenn bei geschlossenen Schaltern T und 17 der Temperaturfühler 44 im Garraum eine Temperatur oberhalb etwa 110°C feststellt. In diesem Fall verbindet der Schaltarm 83 die Leitung 80 mit der Leitung 86. Über die Leitung 86 gelangt dann Spannung an den Blinkgeber K9, der die hinter dem Feld 17 angeordnete Leuchte 94 zum Blinken bringt. Auf dem Feld 17 kann ein Symbol aufgedruckt sein, das als Warnung vor dem Einbringen von Speisen in den Garraum 12 wegen dort herrschender zu hoher Temperatur verstanden wird.The device 1 takes on a different operating phase if, when the switches T and 17 are closed, the temperature sensor 44 detects a temperature above approximately 110 ° C. in the cooking space. In this case, the switching arm 83 connects the line 80 to the line 86. Via line 86, voltage then reaches the flasher unit K9, which causes the lamp 94 arranged behind the field 17 to flash. A symbol can be printed on the field 17, which is understood as a warning of the introduction of food into the cooking space 12 because the temperature is too high there.

Gleichzeitig erhält die Sprüheinrichtung 96 über die Leitung 86 Strom, d.h. die Steuerung 60 gibt über die Steuerleitung 82 ein die Spule 78 betätigendes Signal, so daß das Ventil 74 öffnet und die erwähnten Wände des Garraumes 12 beregnet werden. Dies führt dazu, daß binnen kurzem sich die Temperatur innerhalb des Garraumes 12 soweit senkt, daß der Temperaturfühler 44 seinen Schaltarm 83 umlegt, wodurch die Leitung 80 mit der Leitung 84 elektrisch verbunden ist und die Betriebsart "Dämpfer" von der Vorrichtung 1 realisiert werden kann.At the same time, the spray device 96 receives power via line 86, i.e. the controller 60 gives a signal actuating the coil 78 via the control line 82, so that the valve 74 opens and the walls of the cooking chamber 12 mentioned are irrigated. This leads to the fact that within a short time the temperature inside the cooking chamber 12 drops so far that the temperature sensor 44 flips its switching arm 83, as a result of which the line 80 is electrically connected to the line 84 and the "damper" operating mode can be implemented by the device 1 .

Wenn der Wasserspiegel 47 im Boiler 24 so hoch steigt, daß der Schwimmer 50 den oberen Reed-Kontakt OR öffnet, erhält das Relais K6 keinen Strom, woraufhin der Arbeits-Kontakt K6 öffnet und das Ventil B1 schließt.If the water level 47 in the boiler 24 rises so high that the float 50 opens the upper reed contact OR, the relay K6 receives no current, whereupon the working contact K6 opens and the valve B1 closes.

Nicht dargestellt ist die Betriebsart "Combi-Dämpfer" bei der die Speisen im Garraum sowohl mit Dampf wie auch mit Heißluft behandelt werden. Es liegt im Rahmen der hier beschriebenen Erfindung, den Wasserstandsschalter 46 zusätzlich an einen weiteren Steuerkreis anzuschließen, der die Betriebsart "Combi-Dämpfen" auslöst. Dadurch wird erreicht, daß die Anzeige nicht ausreichenden Wasserstandes stets dann erfolgt, wenn im Boiler 24 Dampf erzeugt werden soll, sei es für den reinen Dämpfbetrieb oder für die Betriebsart "Combi-Dämpfen".The "combi-steamer" operating mode is not shown, in which the food in the cooking space is treated with both steam and hot air. It is within the scope of the invention described here to additionally connect the water level switch 46 to a further control circuit which triggers the "combi-steaming" operating mode. This ensures that the insufficient water level is always displayed when steam is to be generated in the boiler 24, whether for pure steaming mode or for the "combi-steaming" operating mode.

Wie sich aus Vorstehendem ergibt, ist eine derartige, erfindungsgemäß ausgestaltete Vorrichtung 1 in einem Verfahren betreibbar, bei dem der erhitzte Garraum 12 vor dem Einbringen neuen Gargutes zumindest teilweise aktiv gekühlt wird, nämlich durch die automatische Betätigung der Sprüheinrichtung 96 bei Temperaturen im Garraum 12 oberhalb etwa 110°C.As can be seen from the above, such a device 1 designed according to the invention can be operated in a method in which the heated cooking chamber 12 is at least partially actively cooled before the introduction of new food, namely by the automatic actuation of the spray device 96 at temperatures in the cooking chamber 12 above about 110 ° C.

Claims (3)

1. Apparatus for the heat-treatment of foods, comprising a cooking chamber (12) defined by boundary walls (22, 41, 43), a base (38) and a top (40), into which chamber there leads a water pipe (72) provided with spray nozzles and having a valve (74), characterised in that the spray nozzles (64, 66, 68, 70) are directed at the boundary walls (22, 41, 43) and the top (40) and in that a boiler (24) is provided outside the cooking chamber and a steam supply pipe (28) is provided which leads from the boiler (24) into the cooking chamber (12).
2. Apparatus according to claim 1, characterised by a fan (32) disposed in an antechamber (30) adjoining the cooking chamber (12).
3. Apparatus according to claim 2, characterised in that the steam supply pipe (28) leads into the antechamber (30) above the fan (32).
EP85109048A 1984-08-03 1985-07-19 Apparatus for heat-processing food Expired EP0173066B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85109048T ATE43055T1 (en) 1984-08-03 1985-07-19 DEVICE FOR THE HEAT TREATMENT OF FOOD.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3428648 1984-08-03
DE3428648 1984-08-03
DE3446863 1984-12-21
DE3446863 1984-12-21

Publications (2)

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EP0173066A1 EP0173066A1 (en) 1986-03-05
EP0173066B1 true EP0173066B1 (en) 1989-05-17

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US (1) US4698487A (en)
EP (1) EP0173066B1 (en)
JP (1) JPH0714321B2 (en)
CA (1) CA1261673A (en)
DE (1) DE3570181D1 (en)

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DE10015747A1 (en) * 2000-03-29 2001-10-04 Bsh Bosch Siemens Hausgeraete Steam cooker has arrangement that forms temperature demand value for evaporating water by heater corresponding to air pressure at altitude entered into regulator via input device

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DE3821205C2 (en) * 1988-06-23 1998-12-24 Kueppersbusch Combined steam and hot air recirculation device
DE4223451A1 (en) * 1992-07-16 1994-01-20 Eloma Gmbh Steam cooker for food with interior possessing lid, bottom and sides - has nozzle inside of spraying finely dispersed water through inlets
DE10015747A1 (en) * 2000-03-29 2001-10-04 Bsh Bosch Siemens Hausgeraete Steam cooker has arrangement that forms temperature demand value for evaporating water by heater corresponding to air pressure at altitude entered into regulator via input device

Also Published As

Publication number Publication date
CA1261673A (en) 1989-09-26
DE3570181D1 (en) 1989-06-22
JPS6147157A (en) 1986-03-07
US4698487A (en) 1987-10-06
EP0173066A1 (en) 1986-03-05
JPH0714321B2 (en) 1995-02-22

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