EP1816402B1 - Oven - Google Patents
Oven Download PDFInfo
- Publication number
- EP1816402B1 EP1816402B1 EP07100211.7A EP07100211A EP1816402B1 EP 1816402 B1 EP1816402 B1 EP 1816402B1 EP 07100211 A EP07100211 A EP 07100211A EP 1816402 B1 EP1816402 B1 EP 1816402B1
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- EP
- European Patent Office
- Prior art keywords
- cooling
- housing
- oven
- switch panel
- run
- 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.)
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- 238000001816 cooling Methods 0.000 claims description 54
- 238000010438 heat treatment Methods 0.000 claims description 20
- 238000010411 cooking Methods 0.000 claims description 16
- 230000001419 dependent effect Effects 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 210000000056 organ Anatomy 0.000 claims 3
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 230000000875 corresponding effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Classifications
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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
- F24C15/006—Arrangements for circulation of cooling air
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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
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/02—Stoves or ranges heated by electric energy using microwaves
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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
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/08—Arrangement or mounting of control or safety devices
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/6402—Aspects relating to the microwave cavity
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/642—Cooling of the microwave components and related air circulation systems
Definitions
- the invention relates to an oven with a thermal heating elements having cooking chamber and a switch room in which heat-sensitive components are arranged on the one hand and in which switch room on the other hand, a ventilation technically remotely from the rest of the switch room largely separated flow channel or housing for receiving thermally highly stressed and heat-sensitive components Microwave device is arranged, this housing is individually associated with a cooling fan and another cooling fan is arranged in the switch room outside of said flow channel and both cooling devices are operated by control means for continued cooling operation during a follow-up phase after completion of the heating and / or cooking operation.
- Such a oven is known from the DE 3211487 in which there is a lower heating space which can be heated by means of electrical heating elements and a high-frequency-heated heating space which is separated from the lower heating space by an insulating layer.
- a temperature sensor is provided on the insulating layer between the two heating chambers, which always turns on the provided for simultaneous cooling of the high-frequency generator and the electrical and electronic components fan regardless of the onset of the oscillator, if at the heat insulation layer a predetermined Limit temperature is exceeded.
- a circuit arrangement for cooling air control in a household appliance is described.
- a single-pole connected to the neutral conductor fan motor on the other hand connected to a bridgeable by a switch resistor.
- the resistor is connected directly to the AC voltage source depending on the position of a mode switch, or otherwise connected in series with a temperature sensor.
- the present invention has for its object to provide an oven of the type mentioned in such a way that the cooling system for the switch room and the housing of the microwave device associated flow channel is structurally inexpensive and cost-effective and minimizing the device user disturbing properties such as strong and long-term After-run fan noise after completion of the actual oven operation, disturbing air currents and the like allow.
- the thermally correlated and yet fluidly largely separate arrangement of switch room and housing is used to create a simple control device, namely with the control element with the temperature sensor in the switch room, an effective cooling system that - in contrast to a time - on the Responding in the switch room prevailing current temperature and accordingly only when or reaching a safety-related limit temperature, the cooling lag phase ends.
- inventive Control in particular by the indirect thermal coupling between the switch room and housing the follow-up time are significantly reduced, combined with a reduction of ventilation noise and disturbing air flow.
- the thermostatic control member can be adjusted to different, depending on the operating mode and the respective degree of heating of the cooking chamber shutdown temperatures.
- the length of the cooling-lag phase is dependent on the selected operating mode, that is limited to the borderline most necessary.
- a time-bound control device is provided which keeps the cooling fan operating for a minimum follow-up time independently of the thermostatic control element.
- the minimum follow-up time will be shorter than the controlled by means of the temperature sensor total follow-up time with the exception of the solo microwave operation without thermal heating elements, in which there is no significant increase in temperature in the switch room.
- the invention will be explained with reference to the embodiment shown in the drawing below.
- the figure shows a perspective view of the open top of a non-illustrated oven.
- the housing (9) has a plurality of air outlet openings, which communicate with the suction side of the cooling fan (7) and an air outlet opening (20) in the form of a hole group, which face the suction side of the cooling fan.
- the housing (9) consists of two composable moldings, which represent the bottom and the top of the housing (9).
- the housing (9) has behind the air inlet openings (16, 17, 18) air guide elements, which in total z. B. form three substantially mutually parallel channel sections for the incoming from the outside in the direction of arrow 24 cooling air.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Electric Ovens (AREA)
Description
Die Erfindung bezieht sich auf einen Backofen mit einem thermische Heizelemente aufweisenden Garraum und mit einem Schalterraum, in dem einerseits wärmeempfindliche Bauelemente angeordnet sind und in welchem Schalterraum andererseits ein lüftungstechnisch vom Übrigen Schalterraum weitgehend separierter Strömungskanal oder Gehäuse für die Aufnahme von thermisch hochbelasteten und wärmeempfindlichen Bauelementen einer Mikrowelleneinrichtung angeordnet ist, wobei diesem Gehäuse individuell ein Kühlgebläse zugeordnet ist und ein weiteres Kühlgebläse im Schalterraum außerhalb des genannten Strömungskanals angeordnet ist und beide Kühlgeräte durch Steuermittel zum fortgesetzten Kühlbetrieb während einer Nachlaufphase nach Beendigung des Heiz- und/oder Garbetriebs betreibbar sind.The invention relates to an oven with a thermal heating elements having cooking chamber and a switch room in which heat-sensitive components are arranged on the one hand and in which switch room on the other hand, a ventilation technically remotely from the rest of the switch room largely separated flow channel or housing for receiving thermally highly stressed and heat-sensitive components Microwave device is arranged, this housing is individually associated with a cooling fan and another cooling fan is arranged in the switch room outside of said flow channel and both cooling devices are operated by control means for continued cooling operation during a follow-up phase after completion of the heating and / or cooking operation.
Ein derartiger Backofen ist bekannt aus der
Bei bekannten Backöfen zur Garbehandlung von Lebensmitteln ist es üblich die elektrischen oder elektronischen Bauelementen in einem oberhalb des Garraumes oder der Ofenmuffel angeordneten Schalterraum unterzubringen und diesen Raum z. B. mit einem so genannten Querstromgebläse zu kühlen, das heißt die Betriebswärme abzuführen. Bei Öfen mit alleiniger oder zusätzlicher Mikrowelleneinrichtung ist zur Wärmeabführung bzw. Kühlung des Mikrowellengenerators (Magnetron) üblicher Weise ein separates Kühlgebläse z. B. ein Radialgebläse vorgesehen, welches während des Mikrowellenbetriebs oder auch kurz danach die Betriebswärme in diesem separaten Gehäuse abführen soll, welche Betriebswärme bei Verwendung von so genannten Invertern, dass heißt bei Verwendung eines Hochfrequenzgenerators mit Inverternetzteil, Leistungshalbleiter und Hochspannungstransformator besonders hoch ist. Andererseits wird auch bei reinem Back- oder Bratbetrieb mit thermischen Heizelementen innerhalb des Garraumes eine starke Wärmeentwicklung stattfinden insbesondere dann, wenn der Backofen auch mit einer Einrichtung für den so genannten pyrolytischen Selbstreinigungsbetrieb ausgerüstet ist, bei welchem Selbstreinigungsbetrieb etwa 400°C anfallen. Während dem Backofenbetrieb und auch nach Beendigung desselben findet durch Wärmeleitung noch ein beträchtlicher Transport der vorerwähnten Wärmeenergie innerhalb des Backofengehäuses bis zum vorerwähnten Schalterraum statt, so dass auch nach Beendigung einer Hochtemperaturbetriebs zum Schutz der in diesem angeordneten Bauelemente eine erzwungene Kühlung über einen bestimmten Zeitraum aufrechterhalten werden muss, ebenso wie dies für die Wärmeabführung aus dem vorerwähnten Gehäuse für den Hochfrequenzgenerator gilt. Durch eine solche "Nachlaufkühlung" soll die angefallene Betriebswärme aus dem Schalterraum und aus dem erwähnten Gehäuse für die Mikrowelleneinrichtung gezielt nach außen, also bis außerhalb de Gehäuses, entfernt werden, um - wie erwähnt - wärmeempfindliche Bauelementen vor Beschädigung zu schützen, um auch in der unmittelbaren Umgebung des Backofens z. B. an angrenzenden Küchenmöbeln Schäden zu vermeiden und nicht zuletzt um einen dem vorhergehenden Garbetrieb unmittelbar nachfolgenden weiteren Garbetrieb oder Heizbetrieb zu ermöglichen, wozu zumindest innerhalb des Schalterraumes und des Gehäuses eine vorbestimmte Grenztemperatur nicht überschritten werden darf. Insbesondere bei einer solchen Lüfternachlaufsteuerung, also nach Beendigung des Gar- bzw. Heizbetriebes ist der Benutzer gewissen Störfaktoren ausgesetzt, wie z. B. einem störenden Lüftergeräusch, das ausgeht von den noch eingeschalteten Kühlgebläsen und ebenfalls von diesen Kühlgebläsen ausgehenden und meist an der Frontseite des Backofens austretenden störenden Luftströmungen.In known ovens for cooking treatment of food, it is common to accommodate the electrical or electronic components in a above the cooking chamber or the oven muffle arranged switch room and this room z. B. with a so-called cross-flow fan to cool, that is dissipate the heat of operation. For ovens with a single or additional microwave device for heat dissipation or cooling of the microwave generator (magnetron) is usually a separate cooling fan z. B. a radial fan is provided which is to dissipate the operating heat in this separate housing during microwave operation or shortly thereafter, which operating heat when using so-called inverters, that is when using a high-frequency generator with inverter power supply, Power semiconductor and high voltage transformer is particularly high. On the other hand, even with pure baking or roasting operation with thermal heating elements within the cooking chamber a strong heat development will take place, especially if the oven is also equipped with a device for the so-called pyrolytic self-cleaning operation, in which self-cleaning operation about 400 ° C incurred. During the oven operation and after the end of the same takes place by heat conduction still a considerable transport of the aforementioned heat energy within the oven housing to the aforementioned switch room, so that even after completion of a high-temperature operation to protect the arranged in this device forced cooling over a certain period are maintained must, as well as this applies to the heat dissipation from the aforementioned housing for the high-frequency generator. By such a "follow-up cooling", the heat of operation incurred from the switch room and from the mentioned housing for the microwave device to the outside, ie to outside the housing to be removed to - as mentioned - heat-sensitive devices to protect against damage, even in the immediate environment of the oven z. B. to adjacent kitchen furniture to avoid damage and not least to allow the previous Garbetrieb immediately following further cooking operation or heating, including at least within the switch room and the housing a predetermined limit temperature may not be exceeded. In particular, in such a Lüfternachlaufsteuerung, ie after completion of the cooking or heating operation, the user is exposed to certain disturbing factors, such. As a disturbing fan noise, which emanates from the still switched on cooling fans and also emanating from these cooling fans and usually exiting on the front of the oven disturbing air currents.
Bei einem anderen bekannten Backofen mit kombiniertem Garbetrieb einschließlich Mikrowelle (
In der
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Backofen der eingangs genannten Art so auszugestalten, dass das Kühlsystem für den Schalterraum und für das Gehäuse des der Mikrowelleneinrichtung zugeordneten Strömungskanals konstruktiv unaufwendig und kostensparend eingerichtet ist und eine Minimierung der den Gerätebenutzer störenden Eigenschaften wie starke und langzeitige Nachlauf-Lüftergeräusche nach Beendigung des eigentlichen Backofensbetriebes, störende Luftströmungen und dergleichen ermöglichen.The present invention has for its object to provide an oven of the type mentioned in such a way that the cooling system for the switch room and the housing of the microwave device associated flow channel is structurally inexpensive and cost-effective and minimizing the device user disturbing properties such as strong and long-term After-run fan noise after completion of the actual oven operation, disturbing air currents and the like allow.
Diese Aufgabe wird erfindungsgemäß bei einem Backofen der eingangs genannten Art durch die Merkmale des Anspruchs 1 gelöst.This object is achieved with an oven of the type mentioned by the features of claim 1.
Versuche haben ergeben, dass zwischen den Temperaturverhältnissen im relativ großräumigen Schalterraum in dem in diesem Schalterraum angeordneten relativ eng begrenzten Gehäuseraum oder Strömungskanal eine starke thermische Korrelation besteht, insofern, als die jeweils im Schalterraum herrschende Temperatur auch ein Abbild der jeweils herrschenden Temperatur im Gehäuse wiedergibt. Im Gegensatz zu dem eingangs genannten Lösungsvorschlag gemäß
Gemäß der Erfindung ist das thermostatische Steuerorgan auf unterschiedliche, von der Betriebsart und dem jeweiligen Erhitzungsgrad des Garraumes abhängige Abschalttemperaturen einstettbar. Hierdurch ist die Länge der Kühl-Nachlaufphase von der gewählten Betriebsart abhängig, also auf das jeweils grenzwertig notwendigste beschränkt.According to the invention, the thermostatic control member can be adjusted to different, depending on the operating mode and the respective degree of heating of the cooking chamber shutdown temperatures. As a result, the length of the cooling-lag phase is dependent on the selected operating mode, that is limited to the borderline most necessary.
Insbesondere aus Sicherheitsgründen ist gemäß einer Weiterbildung der Erfindung vorgesehen, dass zusätzlich zum thermostatischen Steuerorgan eine zeitgebundene Steuereinrichtung vorgesehen ist, die unabhängig vom thermostatischen Steuerorgan die Kühlgebläse während einer Mindest-Nachlaufzeit in Betrieb hält. Dabei wird bei den meisten Backofen-Betriebsarten mit thermischen Heizelementen die Mindest-Nachlaufzeit kürzer sein als die mit Hilfe des Temperaturfühlers gesteuerte Gesamt-Nachlaufzeit etwa mit Ausnahme des Solo-Mikrowellenbetriebs ohne thermische Heizelemente, bei dem im Schalterraum keine wesentliche Temperaturerhöhung stattfindet.In particular, for safety reasons, according to a development of the invention, it is provided that, in addition to the thermostatic control element, a time-bound control device is provided which keeps the cooling fan operating for a minimum follow-up time independently of the thermostatic control element. In this case, in most oven operating modes with thermal heating elements, the minimum follow-up time will be shorter than the controlled by means of the temperature sensor total follow-up time with the exception of the solo microwave operation without thermal heating elements, in which there is no significant increase in temperature in the switch room.
Die Erfindung wird anhand des in der Zeichnung dargestellten Ausführungsbeispieles nachstehend erläutert. Die Figur zeigt eine perspektivische Darstellung der offenen Oberseite eines nicht weiter dargestellten Backofens.The invention will be explained with reference to the embodiment shown in the drawing below. The figure shows a perspective view of the open top of a non-illustrated oven.
Die in der Zeichnung gezeigte oberste Etage des Backofens bildet einen Schalterraum (1), der an beiden Seiten umgeben ist von nur gestrichelt dargestellten Seitenwänden (2), rückseitig durch eine ebenfalls gestrichelt dargestellte Rückwand (3) und nach oben hin durch eine Deckplatte (4). In diesem Schalterraum (1) untergebracht sind elektrische und/oder elektronische Bauelemente für die Steuerung und Regelung von so genannten konventionellen Heizelementen wie eine Oberhitze/Grill und Unterhitze unterhalb eines nicht dargestellten Garraumes, der unmittelbar unterhalb des Schalterräumes (1), getrennt durch eine Grundplatte (25) platziert ist. Der Backofen soll also ausgerüstet sein mit sämtlichen denkbaren Heizelementen für den konventionellen Ofenbetrieb einschließlich Umluftbetrieb und gegebenenfalls auch pyrolytischem Selbstreinigungsbetrieb. Basis dieses Schalterraumes (1) ist die Grundplatte (25). Da der Backofen auch für den Mirkowellenbetrieb eingerichtet ist, ist im Schalterraum (1) ferner ein Mikrowellengenerator angeordnet, mit einem Magnetron (6), mit einem als Radiallüfter ausgebildeten Kühlgebläses (7), an dessen Druckseite ein zum Magnetron (6) führender Luftschacht (8) angeordnet ist, sowie mit einem Inverternetzteil des Mikrowellengenerators, welcher innerhalb eines Gehäuses (9) angeordnet ist. Der das Magnetron umströmende, erwärmte Kühlluftstrom (12) gelangt in einen im Bereich der Frontseite (10) des Backofens angeordneten Abluftschacht (11) und von hier aus ins Freie. Dieser Kühlluftstrom ist durch Teile (12) verdeutlicht. Ferner sind im Schalterraum (1) untergebracht ein Kühlgebläse (13), das als Querstromlüfter ausgebildet ist und das unmittelbar den Schalterraum (1) durchströmende Kühlluftströme gemäß Pfeil 21 generiert, sowie weitere Bauelemente und Bauelementegruppen, die in üblicher Weise bei derartigen Backöfen verwendet werden. Wie ferner gezeigt, ist das Kühlgebläse (7) mit seiner Saugseite unmittelbar an die Stirnseite (14) des Gehäuses (9) angeschlossen, während sich das Kühlgebläse (13) an einer Längsseite (15) des Gehäuses (9) befindet. Das Gehäuse (9) selbst ist unmittelbar an der Rückseite des Backofens und damit auch des Schalterraumes (1) angeordnet, so dass seine Lufteintrittsöffnungen (16, 17, 18) an der Ofenrückseite unmittelbar an die Außenluft angeschlossen sind. Hierzu sind in der Rückwand drei entsprechende Lufteintrittsöffnungen z. B. in Form einer Lochgruppe vorgesehen.The top floor of the oven shown in the drawing forms a switch room (1) which is surrounded on both sides by dashed lines shown side walls (2), the back by a dashed lines shown back wall (3) and upwards by a cover plate (4 ). In this switch room (1) housed electrical and / or electronic components for the control and regulation of so-called conventional heating elements such as a top heat / grill and bottom heat below a cooking chamber, not shown, immediately below the Schalterräumes (1), separated by a base plate (25) is placed. The oven should therefore be equipped with all conceivable heating elements for conventional oven operation including recirculation mode and possibly also pyrolytic self-cleaning operation. Basis of this switch room (1) is the base plate (25). Since the Oven is also set up for the microwave operation, in the switch room (1) further arranged a microwave generator, with a magnetron (6), designed as a radial fan cooling fan (7), at its pressure side to the magnetron (6) leading air duct (8) is arranged, as well as with an inverter power supply of the microwave generator, which is arranged within a housing (9). The heated cooling air flow (12) flowing around the magnetron passes into an exhaust air shaft (11) arranged in the area of the front side (10) of the oven and from here into the open air. This cooling air flow is illustrated by parts (12). Furthermore, in the switch room (1) housed a cooling fan (13), which is designed as a cross-flow fan and directly the switch room (1) flowing through cooling air flows generated according to
Wie die Zeichnung ferner zeigt, besitzt das Gehäuse (9) mehrere Luftaustrittsöffnungen, die mit der Saugseite des Kühlgebläses (7) kommunizieren sowie eine Luftaustrittsöffnung (20) in Form einer Lochgruppe, die der Saugseite des Kühlgebläses zugewandt sind. Das Gehäuse (9) besteht aus zwei zusammensetzbaren Formteilen, die die Unterseite und die Oberseite des Gehäuses (9) darstellen. Das Gehäuse (9) besitzt hinter den Lufteintrittsöffnungen (16, 17, 18) Luftleitelemente, welche insgesamt z. B. drei im Wesentlichen parallel zueinander verlaufende Kanalabschnitte für die von außen her in Pfeilrichtung 24 einströmende Kühlluft bilden. Anschließend an diese Kanalabschnitte und Luftleitelemente befinden sich weitere Luftleitelemente, durch welche die in den Kanalabschnitten herangeführte Kühlluft (Pfeile 24) verteilt wird in Richtung von thermisch hochbelasteten und daher zu kühlenden Bauelementen des Mikrowellengenerators d. h. seines Inverters z. B. in Richtung einer Hochfrequenzspule eines Kühlkörpers des Inverternetzteiles sowie in Richtung einer Platine des Inverternetzteiles, welche Platine im Unterteil des Gehäuses (9) mit Abstand zu den Gehäuseenden angeordnet ist, so dass die Kühlluftströmung beide Platinenseiten umstreichen kann. Durch die strömungstechnische Ankopplung der im Inneren des Gehäuses (9) strömenden Kühlluftströme über die Luftaustrittsöffnungen z. B. 20 an die Saugseiten der beiden Kühlluftgebläse (7, 13) sowie durch das Vorhandensein der vorgenannten Luftleitelemente erhält man wenigstens zwei im Wesentlichen senkrecht aufeinander stehende Luftströmungen in Richtung der Pfeile 31 des Kühlgebläses (7) und in Pfeilrichtung 32 in Richtung zum Kühlgebläse (13) hin. Die Luftaustrittsöffnungen (20) sind in unmittelbarer Nähe der Saugseite des Kühlgebläses (13) angeordnet und dienen zur zusätzlichen Wärmeabführung aus dem Bereich des Inverternetzteiles des Mikrowellengenerators.As the drawing also shows, the housing (9) has a plurality of air outlet openings, which communicate with the suction side of the cooling fan (7) and an air outlet opening (20) in the form of a hole group, which face the suction side of the cooling fan. The housing (9) consists of two composable moldings, which represent the bottom and the top of the housing (9). The housing (9) has behind the air inlet openings (16, 17, 18) air guide elements, which in total z. B. form three substantially mutually parallel channel sections for the incoming from the outside in the direction of
Wie weiterhin in der Zeichnung gezeigt, ist das Gehäuse (9) innerhalb des Schalterraumes (1) angeordnet und bildet einen Strömungskanal zusammen mit dem Kühlgebläse (7), dem Luftschacht (8), dem Magnetron (6) und einem ins Freie führenden, an der Gerätefrontseite (10) endenden Luftschacht, aus dem die Kühlluftströmung (21) aus dem Backofen austritt. Dem gegenüber generiert das Kühlgebläse (13) Kühlluftströme (21), die aus dem Schalterraum (1) die bei Backofenbetrieb anfallende Betriebswärme zur Frontseite (10) hin abführen sollen zum Zwecke der Kühlung der im Schalterraum (1) befindlichen Bauelemente und zur Kühlung der Seitenwände (2) des Backofens, denen wärmeempfindliche Küchenmöbel unmittelbar benachbart sein können.As further shown in the drawing, the housing (9) within the switch room (1) is arranged and forms a flow channel together with the cooling fan (7), the air duct (8), the magnetron (6) and a leading to the outside, on the front of the appliance (10) ending duct, from which the cooling air flow (21) exits the oven. On the other hand, the cooling fan (13) generates cooling air streams (21) which are to discharge the heat from the switch room (1) to the front side (10) during oven operation for the purpose of cooling the components in the switch room (1) and cooling the side walls (2) the oven, which heat-sensitive kitchen furniture can be immediately adjacent.
Durch die genannte Korrelation der Temperatur im Schalterraum (1) und im thermisch hochbelastetem Gehäuse (9) erhält man an einem Temperaturfühler (26) am frontseitigen Ende des Schalterraumes (1) ein jeweils aktuelles Abbild der Temperatur im Gehäuse (9). Der Temperaturfühler (26) kann auf einer Steuerplatine für die allgemeine Backofensteuerung platziert sein. Insbesondere aus Sicherheitsgründen kann vorgesehen sein, dass zusätzlich zu dem thermostatischen Steuerorgan mit Temperaturfühler (26) eine zeitgebundene Steuereinrichtung vorgesehen ist, die ab Beendigung des eigentlichen Funktionsbetriebs des Backofens entweder bei Ausfall des thermostatischen Steuerorgans oder aber infolge zu kurzzeitiger Aktivierung dieses Steuerorgans z. B. mangels wesentlicher Erhitzung des Garraumes und entsprechenden Temperatur-Nachschubes bei reinem Mikrowelfen-Betrieb desselben den Betrieb des Kühlsystems d. h. den Betrieb der Kühlgebläse (7, 13) während einer Mindest-Nachlaufzeit entsprechend vor bestimmter Grenzwert-Temperaturen aufrecht hält.By said correlation of the temperature in the switch room (1) and in the thermally highly loaded housing (9) is obtained at a temperature sensor (26) at the front end of the switch room (1) a respective current image of the temperature in the housing (9). The temperature sensor (26) may be placed on a control board for the general oven control. In particular, for safety reasons, it may be provided that in addition to the thermostatic control element with temperature sensor (26) a time-bound control device is provided, which from the end of the actual functional operation of the oven either in case of failure of the thermostatic control element or as a result of too short activation of this control element z. B. the lack of substantial heating of the cooking chamber and corresponding temperature replenishment in pure micro-operation of the same operation of the cooling system ie the operation of the cooling fan (7, 13) during a minimum follow-up time keeps upright before certain threshold temperatures.
Vorzugsweise ist das thermostatische Steuerorgan auf unterschiedliche, von der Betriebsart und dem jeweiligen Erhitzungsgrad des Garraumes abhängige Abschalttemperaturen einstellbar. Als einzige Konstante verbleibt dabei die vorgenannte hilfsweise bzw. bedarfsweise Zeitsteuerung, während die zumeist längere temperaturabhängige Nachlaufzeit von der am Temperaturfühler (26) jeweils aktuell gemessenen Temperatur im Schalterraum (1) und damit auch im korrelierendem Gehäuse (9) abhängig ist, d. h. bei den meisten Gar-Betriebsarten des Backofens kürzer und insbesondere bzgl. der Kühlfunktion sicherer ist als z. B. eine zeitgesteuerte Nachlaufkühlung.Preferably, the thermostatic control element is adjustable to different, depending on the operating mode and the respective degree of heating of the oven shutdown temperatures. The only constant remaining is the aforementioned auxiliary or, if necessary, time control, while the usually longer temperature-dependent follow-up time depends on the currently measured temperature on the temperature sensor (26) in the switch room (1) and thus also in the correlating housing (9), d. H. shorter in most cooking modes of the oven and safer in particular with respect to the cooling function than z. B. a time-controlled overrun cooling.
Claims (2)
- Oven having a cooking compartment comprising thermal heating elements and having a switch panel (1), in which on one side heat-sensitive components are arranged and in which switch panel (1) on the other side a flow channel or housing (9) which is largely separated from the remaining switch panel (1) in ventilation terms is arranged for accommodating thermally high stressed and heat-sensitive components of a microwave facility, wherein a cooling fan (7) is assigned individually to this housing (9) and a further cooling fan (13) is arranged in the switch panel (1) outside of the said flow channel (9), and both cooling fans (7, 13) can be operated by control means for the continued cooling operation during a run-on phase after conclusion of the heating and/or cooking operation, characterised in that a thermostatic control organ is provided for the control of both cooling fans (7, 13) at least during the run-on phase, the only temperature sensor (26) of which is arranged in the switch panel (1) outside of the housing (9) and which can be set to different switch-off temperatures as a function of the mode of operation and the respective degree of heating of the cooking compartment, as a result of which the length of the cooling run-off phase is dependent on the selected mode of operation, in other words is restricted to the respective marginally most necessary in each instance.
- Oven according to claim 1, characterised in that in addition to the thermostatic control organ, a time-bound control facility is provided, which keeps the cooling fan (7, 13) in operation during a minimal run-off time irrespective of the thermostatic control organ.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL07100211T PL1816402T3 (en) | 2006-02-06 | 2007-01-08 | Oven |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006005293A DE102006005293A1 (en) | 2006-02-06 | 2006-02-06 | oven |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1816402A2 EP1816402A2 (en) | 2007-08-08 |
EP1816402A3 EP1816402A3 (en) | 2008-06-11 |
EP1816402B1 true EP1816402B1 (en) | 2014-04-16 |
Family
ID=38068500
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07100211.7A Active EP1816402B1 (en) | 2006-02-06 | 2007-01-08 | Oven |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1816402B1 (en) |
DE (1) | DE102006005293A1 (en) |
ES (1) | ES2460992T3 (en) |
PL (1) | PL1816402T3 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007041821A1 (en) * | 2007-09-03 | 2009-03-05 | BSH Bosch und Siemens Hausgeräte GmbH | Home appliance control device |
DE102008033534A1 (en) * | 2008-07-17 | 2010-01-21 | BSH Bosch und Siemens Hausgeräte GmbH | oven |
ITTO20090611A1 (en) * | 2009-08-04 | 2011-02-05 | Indesit Co Spa | METHOD TO CHECK THE FUNCTIONING OF AN OVEN |
FR2965331B1 (en) * | 2010-09-27 | 2014-10-10 | Fagorbrandt Sas | METHOD FOR CONTROLLING OPERATION OF A COOKING OVEN AND ASSOCIATED COOKING OVEN |
DE102012204234A1 (en) * | 2012-03-16 | 2013-09-19 | BSH Bosch und Siemens Hausgeräte GmbH | Microwave combination unit with a fan for cooling |
DE102014202443A1 (en) * | 2014-02-11 | 2015-08-13 | BSH Hausgeräte GmbH | Cooling door components |
CN105283050B (en) * | 2015-11-19 | 2018-08-10 | 珠海格力电器股份有限公司 | Heat radiation structure for induction cooker or electric pressure cooker, electric appliance box and induction cooker |
KR20210106290A (en) * | 2020-02-20 | 2021-08-30 | 엘지전자 주식회사 | Cooking appliance and method for controlling thereof |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2806158C2 (en) * | 1978-02-14 | 1982-12-23 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | Double oven |
US4184945A (en) * | 1978-06-12 | 1980-01-22 | Litton Systems, Inc. | Microwave wall oven air flow system |
DE8103513U1 (en) * | 1981-02-10 | 1985-09-12 | Bosch-Siemens Hausgeraete Gmbh, 7000 Stuttgart | Oven, preferably with a thermal heating device and a microwave heating device |
DE3104677A1 (en) * | 1981-02-10 | 1982-08-12 | Bosch Siemens Hausgeraete | Baking oven, preferably with a thermal heating device and with a microwave heating device |
JPS57170494A (en) * | 1981-04-13 | 1982-10-20 | Matsushita Electric Ind Co Ltd | Heater |
DE3702952A1 (en) * | 1987-01-31 | 1988-08-11 | Bbc Brown Boveri & Cie | Method and arrangement for regulating a fan drive |
FR2618529B1 (en) * | 1987-07-24 | 1989-12-29 | Dietrich & Cie De | ADDITIONAL VENTILATION CIRCUIT FOR COMBINED ELECTRO-DOMESTIC OVEN |
DE3839657C2 (en) * | 1988-11-24 | 1993-11-18 | Miele & Cie | Air duct system for an oven |
JPH04249886A (en) * | 1990-12-28 | 1992-09-04 | Toshiba Corp | Microwave oven |
DE9115013U1 (en) | 1991-12-03 | 1992-02-06 | Bosch-Siemens Hausgeräte GmbH, 8000 München | Circuit arrangement for cooling fan control for a household appliance |
DE4222092A1 (en) * | 1992-07-06 | 1994-01-13 | Miele & Cie | Oven with a cooling air blower and / or with a hot air blower |
DE29502570U1 (en) * | 1995-02-16 | 1995-04-06 | Bosch-Siemens Hausgeräte GmbH, 81669 München | Oven / roasting oven with a thermostatically controlled motor fan |
-
2006
- 2006-02-06 DE DE102006005293A patent/DE102006005293A1/en not_active Withdrawn
-
2007
- 2007-01-08 EP EP07100211.7A patent/EP1816402B1/en active Active
- 2007-01-08 PL PL07100211T patent/PL1816402T3/en unknown
- 2007-01-08 ES ES07100211.7T patent/ES2460992T3/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP1816402A3 (en) | 2008-06-11 |
PL1816402T3 (en) | 2014-08-29 |
EP1816402A2 (en) | 2007-08-08 |
DE102006005293A1 (en) | 2007-08-09 |
ES2460992T3 (en) | 2014-05-16 |
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