EP1909037B1 - Baking oven with a muffle and a cross-flow ventilator - Google Patents

Baking oven with a muffle and a cross-flow ventilator Download PDF

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Publication number
EP1909037B1
EP1909037B1 EP07018245.6A EP07018245A EP1909037B1 EP 1909037 B1 EP1909037 B1 EP 1909037B1 EP 07018245 A EP07018245 A EP 07018245A EP 1909037 B1 EP1909037 B1 EP 1909037B1
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EP
European Patent Office
Prior art keywords
cross
flow fan
exhaust
opening
region
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Not-in-force
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EP07018245.6A
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German (de)
French (fr)
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EP1909037A2 (en
EP1909037A3 (en
Inventor
Andreas Horstkötter
August Oberröhrmann
Helmut Rothenbacher
Ulrich Dr. Sillmen
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Miele und Cie KG
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Miele und Cie KG
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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
    • F24C15/20—Removing cooking fumes
    • F24C15/2007—Removing cooking fumes from oven cavities

Definitions

  • the invention relates to an oven with a baking muffle, wherein a cross-flow fan with a subsequent cooling air duct generates a cooling air flow, the discharge takes place into the open, and wherein in the cooling air duct a Wrasenabzugskanal opens, through which the vapor is sucked out of the baking muffle.
  • an oven in which the point of confluence of the vapor extraction channel is arranged in the vicinity of the air outlet opening of a formed as a cooling air collecting duct exhaust duct.
  • an air guide plate is arranged in the known embodiment in the cooling air collecting channel, in order to mix the cooling air flow, which flows at a relatively high speed, the vapors according to the injector principle.
  • DE 37 41 975 is a device for controlling a steam-operated cooking appliance, which is equipped with one of a fan with the cooling air flow generated in the pressure channel.
  • the blower is provided with a leading from the pressure channel to the suction side of the blower return line, which communicates with the cooking chamber via a closable steam outlet opening.
  • the vapor outlet can be controlled.
  • the invention thus raises the problem of further developing an oven with a baking muffle in such a way that the connection of a vapor extraction channel to its constructional or structural design is substantially simplified.
  • connection of a vapor extraction channel is considerably simplified by its structural or structural design.
  • the cross-flow fan draws in strong air from the outside and into the cooling air duct.
  • an opening in the housing of the cross-flow fan is provided, so that a simple direct coupling of the underlying treatment space by means of the Wrasenabzugskanals.
  • the exhaust duct and the exhaust pipe / mixing box can be reduced to a minimum.
  • the entire Wrasenabsaugung consists in minimal form only from the modified cross-flow fan and two underlying openings in the mounting plate and in the baking muffle to realize the flow-conducting coupling of the baking muffle by means of the vapor evacuation channel thus formed.
  • the exhaust duct can be omitted if the cross-flow fan is arranged with its blow-out in the immediate vicinity of the exhaust opening of the oven housing.
  • the mouth region of the vapor extraction channel is in this case arranged directly in the vicinity of the blow-out region of the cross-flow fan, at which the required suction capacity for the vapor from the vapor extraction channel is established at a minimum rotational speed of the fan wheel.
  • the mouth region is arranged in the flow direction of the cooling air flow behind the fan.
  • the mouth region is arranged relative to the cross flow fan such that the pumping speed is greatest at maximum speed of the cross flow fan. It is advantageous to the discharge of the Cross-flow fan an exhaust duct for discharging the mixed air flow from cooling air and vapor attached.
  • the cross-flow fan with the suction opening for the mouth region of the vapor extraction channel is in this case arranged on a mounting part, wherein the mounting part for this purpose has an opening.
  • the FIG. 1 shows a baking oven 1 with a baking muffle 2, wherein above the baking muffle 2 a cross-flow fan 3 with a subsequent cooling air duct 4 generates a cooling air flow, the discharge takes place in the open.
  • the mouth region 5 of a vapor withdrawal channel 6 is arranged directly in the vicinity of the blow-out region 7 of the cross-flow fan 3.
  • a pumping speed for the vapor from the vapor outlet channel 6 a arises at an empirically determined minimum speed of the fan 8, a pumping speed for the vapor from the vapor outlet channel 6 a.
  • the mouth region 5 is arranged in the flow direction of the cooling air flow behind the impeller 8, which is only hinted at here.
  • the mouth region 5 is arranged relative to the cross-flow fan 3 such that the pumping speed is greatest at the maximum rotational speed of the cross-flow fan 3.
  • an exhaust air duct 9 for discharging the mixed air flow from cooling air and vapor can be attached to the blow-out region 7 of the cross-flow fan 3.
  • the cross-flow fan 3 is arranged with a suction opening 10 for the mouth region 5 of the vapor withdrawal channel 6 on a mounting part 11, wherein the mounting part 11 for this purpose has a corresponding opening 10 to the suction port.
  • the mounting part 11 in its functional effect is better seen in the FIG. 3 , Of the Cross-flow fan 3 is fixed by means of the mounting part 11 in a simple manner to the rest of the oven 1.
  • the jacket region 12 of the cross-flow fan 3 is provided with letters from "A" to "L". These letters indicate the pressure measurement points of tests performed and are also plotted on the x-axis in the diagrams below, from “A” to "L”. On the Y-axis, the pressure conditions, ie overpressure or negative pressure, indicated that set at maximum speed of the cross-flow fan 3.
  • the range from "A" to about "D" of the blow-out 7 a Represents suction zone.
  • FIG. 4 shows a further graph, wherein in the graph on the X-axis, the measuring points "A" to "L" of the lateral surface 12 of the cross-flow fan 3 are plotted, wherein the solid line represents the suction pressure behavior of the cross-flow fan 3, if he with his Maximum speed is operated. Recognizable in the graph is a pumping speed of the cross-flow fan 3 in the region between the first and fourth measuring point. If the fan speed is reduced, as shown by the dashed line, the result is also in the range of the first to fourth measuring point "A" to "D” a pressure range.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Baking, Grill, Roasting (AREA)
  • Electric Ovens (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)

Description

Die Erfindung betrifft einen Backofen mit einer Backmuffel, wobei ein Querstromlüfter mit einem sich anschließenden Kühlluftkanal einen Kühlluftstrom erzeugt, dessen Abführung ins Freie erfolgt, und wobei in den Kühlluftkanal ein Wrasenabzugskanal mündet, durch den der Wrasen aus der Backmuffel absaugbar ist.The invention relates to an oven with a baking muffle, wherein a cross-flow fan with a subsequent cooling air duct generates a cooling air flow, the discharge takes place into the open, and wherein in the cooling air duct a Wrasenabzugskanal opens, through which the vapor is sucked out of the baking muffle.

Bei bekannten Backöfen wird über einen oberhalb der Backmuffel angeordneten Kühlluftkanal auch der Wrasen abgesaugt, der dann ins Freie abgeführt wird. So sind aus dem Stand der Technik unterschiedliche Ausführungsformen bekannt, um über den Kühlluftkanal den Wrasenabzug zu ermöglichen.In known ovens, the vapor is sucked off via a cooling air duct arranged above the baking muffle, which is then removed into the open air. Thus, different embodiments are known from the prior art in order to allow the Wrasenabzug via the cooling air duct.

So ist beispielsweise aus der DE 26 56 565 ein Backofen bekannt, bei dem die Einmündungsstelle des Wrasenabzugskanals in der Nähe der Luftaustrittsöffnung eines als Kühlluftsammelkanal ausgebildeten Abluftkanals angeordnet ist. Um eine Ansaugung des Wrasens zu erreichen, wird bei der bekannten Ausführungsform im Kühlluftsammelkanal ein Luftleitblech angeordnet, um auf diese Weise der Kühlluftströmung, die mit relativ hoher Geschwindigkeit strömt, den Wrasen nach dem Injektorprinzip beizumischen.For example, from the DE 26 56 565 an oven is known in which the point of confluence of the vapor extraction channel is arranged in the vicinity of the air outlet opening of a formed as a cooling air collecting duct exhaust duct. In order to achieve an intake of Wrasens, an air guide plate is arranged in the known embodiment in the cooling air collecting channel, in order to mix the cooling air flow, which flows at a relatively high speed, the vapors according to the injector principle.

Eine andere Ausführungsform des Standes der Technik ist in der DE 37 41 975 beschrieben, wobei es sich hierbei um eine Vorrichtung zur Steuerung eines mit Dampf betriebenen Gargerätes handelt, welches mit einem von einem Gebläse mit im Druckkanal erzeugten Kühlluftstrom ausgestattet ist. Hierzu ist das Gebläse mit einer vom Druckkanal zur Saugseite des Gebläses führenden Rückführleitung versehen, welche über eine verschließbare Dampfaustrittsöffnung mit dem Garraum in Verbindung steht. Somit lässt sich bei dieser Ausführungsform insbesondere der Wrasenabzug steuern.Another embodiment of the prior art is in DE 37 41 975 described, which is a device for controlling a steam-operated cooking appliance, which is equipped with one of a fan with the cooling air flow generated in the pressure channel. For this purpose, the blower is provided with a leading from the pressure channel to the suction side of the blower return line, which communicates with the cooking chamber via a closable steam outlet opening. Thus, in this embodiment, in particular the vapor outlet can be controlled.

Bei den bekannten Geräten werden sogenannte Querstromlüfter zur Wrasenabsaugung eingesetzt. Sie haben zwar einen schlechten Wirkungsgrad, sind aber vergleichsweise leise und erfüllen die Anforderungen an einen großen Luftmengendurchsatz zur Kühlung und zur Wrasenabsaugung. Wegen der Bauform ist die Adaption an den Ofenraum aber aufwendig und erfordert in der Regel weitere Bauteile. Bekannt sind aufwendige Systeme wie beschrieben. Bei den Bauarten nach dem Injektorprinzip besteht der Nachteil, dass beispielsweise mittels Luftleitblechen eine Verengung in dem Abluftkanal eingebaut werden muss, um die Injektorwirkung zu erzielen.In the known devices so-called cross-flow fans are used for Wrasenabsaugung. Although they have a poor efficiency, but are relatively quiet and meet the requirements of a large air flow rate for cooling and fume extraction. Because of the design, the adaptation to the furnace chamber but consuming and usually requires other components. Are known complex systems as described. In the designs according to the injector principle has the disadvantage that, for example by means of air baffles a constriction must be installed in the exhaust duct to achieve the injector effect.

Die andere oben erläuterte Ankopplung, wobei ein verlängerter Abluftstutzen in einer geeigneten Form in die Nähe der Walze des Querstromlüfters gebracht wurde, weist den Nachteil auf, dass der Wrasen über eine zusätzliche Leitung an die Oberseite des Querstromlüfters geführt werden muss. Hier ist die konkrete Realisierung des Abluftstutzens sehr aufwendig, wobei zudem im Stutzen bei Temperaturen unter 100 °C Kondensation von Wasserdampf zu berücksichtigen ist.The other coupling described above, wherein an elongated exhaust spigot has been brought in a suitable form in the vicinity of the roller of the cross-flow fan, has the disadvantage that the vapor must be guided via an additional line to the top of the cross-flow fan. Here, the concrete realization of the exhaust pipe is very expensive, and also in the nozzle at temperatures below 100 ° C condensation of water vapor must be considered.

Dokument EP 0663568 stellt darüber hinaus einen für die Erfindung relevanten Stand der Technik dar.document EP 0663568 moreover represents a relevant prior art for the invention.

Der Erfindung stellt sich somit das Problem einen Backofen mit einer Backmuffel derart weiter zu bilden, dass die Anbindung eines Wrasenabzugskanals von seiner baulichen bzw. konstruktiven Gestaltung wesentlich vereinfacht ist.The invention thus raises the problem of further developing an oven with a baking muffle in such a way that the connection of a vapor extraction channel to its constructional or structural design is substantially simplified.

Erfindungsgemäß wird dieses Problem mit den Merkmalen des Patentanspruchs 1 gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den nachfolgenden Unteransprüchen.According to the invention, this problem is solved by the features of patent claim 1. Advantageous embodiments and further developments of the invention will become apparent from the following subclaims.

Die mit der Erfindung erreichbaren Vorteile bestehen insbesondere darin, dass die Anbindung eines Wrasenabzugskanals von seiner baulichen bzw. konstruktiven Gestaltung wesentlich vereinfacht wird. Im vorderen Bereich nahe der Ausblasöffnung saugt der Querstromlüfter stark von außen zusätzlich Luft an und in den Kühlluftkanal hinein. An dieser Stelle ist eine Öffnung in dem Gehäuse des Querstromlüfters vorgesehen, so dass eine einfache direkte Ankupplung des darunter liegenden Behandlungsraums mittels des Wrasenabzugskanals erfolgt.The advantages achievable with the invention are, in particular, that the connection of a vapor extraction channel is considerably simplified by its structural or structural design. In the front area near the exhaust opening, the cross-flow fan draws in strong air from the outside and into the cooling air duct. At this point, an opening in the housing of the cross-flow fan is provided, so that a simple direct coupling of the underlying treatment space by means of the Wrasenabzugskanals.

Mit den konstruktiven Merkmalen lässt sich nun eine einfache Ankupplung des Querstromlüfters zur Wrasenabsaugung realisieren. Als besonderer Vorteil wird bei der erfindungsgemäßen Lösung gesehen, dass der Abluftkanal und der Abluftstutzen/Mischkasten hierbei auf ein Minimum reduziert werden können. Die gesamte Wrasenabsaugung besteht in Minimalform nur noch aus dem modifizierten Querstromlüfter und zwei darunter liegenden Öffnungen im Montageblech und in der Backmuffel zur Realisierung der strömungsleitenden Ankupplung der Backmuffel mittels des so gebildeten Wrasenabzugskanals. Der Abluftkanal kann entfallen, wenn der Querstromlüfter mit seinem Ausblasbereich in unmittelbarer Nähe der Ausblasöffnung des Backofengehäuses angeordnet ist.With the structural features can now realize a simple coupling of the cross-flow fan for fume extraction. As a particular advantage is seen in the inventive solution that the exhaust duct and the exhaust pipe / mixing box can be reduced to a minimum. The entire Wrasenabsaugung consists in minimal form only from the modified cross-flow fan and two underlying openings in the mounting plate and in the baking muffle to realize the flow-conducting coupling of the baking muffle by means of the vapor evacuation channel thus formed. The exhaust duct can be omitted if the cross-flow fan is arranged with its blow-out in the immediate vicinity of the exhaust opening of the oven housing.

Gemäß der Erfindung ist der Mündungsbereich des Wrasenabzugskanals hierbei unmittelbar in der Nähe des Ausblasbereiches des Querstromlüfters angeordnet, an dem sich bei einer Mindestdrehzahl des Lüfterrades das erforderliche Saugvermögen für den Wrasen aus dem Wrasenabzugskanal einstellt. Der Mündungsbereich ist in Strömungsrichtung des Kühlluftstromes hinter dem Lüfterrad angeordnet. Der Mündungsbereich ist relativ zu dem Querstromlüfter derart angeordnet, dass das Saugvermögen bei Maximaldrehzahl des Querstromlüfters am größten ist. Dabei ist in vorteilhafter Weise an den Ausblasbereich des Querstromlüfters ein Abluftkanal zur Abführung des Mischluftstromes aus Kühlluft und Wrasen angesetzt. Der Querstromlüfter mit der Ansaugöffnung für den Mündungsbereich des Wrasenabzugskanals ist hierbei auf einem Montageteil angeordnet, wobei das Montageteil hierfür eine Öffnung aufweist.According to the invention, the mouth region of the vapor extraction channel is in this case arranged directly in the vicinity of the blow-out region of the cross-flow fan, at which the required suction capacity for the vapor from the vapor extraction channel is established at a minimum rotational speed of the fan wheel. The mouth region is arranged in the flow direction of the cooling air flow behind the fan. The mouth region is arranged relative to the cross flow fan such that the pumping speed is greatest at maximum speed of the cross flow fan. It is advantageous to the discharge of the Cross-flow fan an exhaust duct for discharging the mixed air flow from cooling air and vapor attached. The cross-flow fan with the suction opening for the mouth region of the vapor extraction channel is in this case arranged on a mounting part, wherein the mounting part for this purpose has an opening.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen rein schematisch dargestellt und wird nachfolgend näher beschrieben. Es zeigt :

Figur 1
eine teilweise geschnittene Seitenansicht eines Backofens mit einer Backmuffel oberhalb der ein Querstromlüfter angeordnet ist;
Figur 2
eine isolierte Darstellung des Querstromlüfters gemäß der Figur 1, wobei über die Mantelfläche des Gehäuses Messpunkte vermerkt sind; zur Darstellung des Saug-Druck-Verhaltens des Querstromlüfters über die Mantelfläche ist der Verlauf des Gesamtdrucks in Abhängigkeit der Lage des Messpunktes in der darunter angeordneten Grafik dargestellt;
Figur 3
eine weitere Ansicht gemäß der Figur 1, wobei hierbei der Querstromlüfter in Rückansicht angedeutet ist und
Figur 4
eine weitere grafische Darstellung des Gesamtdrucks in Abhängigkeit der Drehzahl des Querstromlüfters und der Lage des Messpunktes.
An embodiment of the invention is shown purely schematically in the drawings and will be described in more detail below. It shows :
FIG. 1
a partially sectioned side view of a baking oven with a baking muffle is arranged above a cross-flow fan;
FIG. 2
an isolated view of the cross-flow fan according to the FIG. 1 , wherein measuring points are noted over the lateral surface of the housing; to illustrate the suction-pressure behavior of the cross-flow fan over the lateral surface of the course of the total pressure in dependence of the position of the measuring point is shown in the graph arranged underneath;
FIG. 3
another view according to the FIG. 1 , in which case the cross-flow fan is indicated in rear view and
FIG. 4
a further graphical representation of the total pressure as a function of the speed of the cross-flow fan and the position of the measuring point.

Die Figur 1 zeigt einen Backofen 1 mit einer Backmuffel 2, wobei oberhalb der Backmuffel 2 ein Querstromlüfter 3 mit einem sich anschließenden Kühlluftkanal 4 einen Kühlluftsstrom erzeugt, dessen Abführung in das Freie erfolgt. Wie aus der Figur 1 zu erkennen ist, ist hierbei der Mündungsbereich 5 eines Wrasenabzugskanals 6 unmittelbar in der Nähe des Ausblasbereichs 7 des Querstromlüfters 3 angeordnet. Um insbesondere eine effektive Absaugung des Wrasens zu ermöglichen, stellt sich bei einer empirisch ermittelten Mindestdrehzahl des Lüfterrades 8 ein Saugvermögen für den Wrasen aus dem Wrasenabzugskanal 6 ein. Hierzu ist, wie aus der Figur zu erkennen ist, der Mündungsbereich 5 in Strömungsrichtung des Kühlluftstromes hinter dem Lüfterrad 8 angeordnet, welches hier lediglich nur angedeutet ist. Der Mündungsbereich 5 ist relativ zu dem Querstromlüfter 3 derart angeordnet, dass das Saugvermögen bei der Maximaldrehzahl des Querstromlüfters 3 am größten ist. Dabei kann, wie in dem vorliegenden Ausführungsbeispiel, an den Ausblasbereich 7 des Querstromlüfters 3 ein Abluftkanal 9 zur Abführung des Mischluftstromes aus Kühlluft und Wrasen angesetzt sein.The FIG. 1 shows a baking oven 1 with a baking muffle 2, wherein above the baking muffle 2 a cross-flow fan 3 with a subsequent cooling air duct 4 generates a cooling air flow, the discharge takes place in the open. Like from the FIG. 1 can be seen, in this case the mouth region 5 of a vapor withdrawal channel 6 is arranged directly in the vicinity of the blow-out region 7 of the cross-flow fan 3. In order to allow in particular effective exhaustion of Wrasens, arises at an empirically determined minimum speed of the fan 8, a pumping speed for the vapor from the vapor outlet channel 6 a. For this purpose, as can be seen from the figure, the mouth region 5 is arranged in the flow direction of the cooling air flow behind the impeller 8, which is only hinted at here. The mouth region 5 is arranged relative to the cross-flow fan 3 such that the pumping speed is greatest at the maximum rotational speed of the cross-flow fan 3. In this case, as in the present exemplary embodiment, an exhaust air duct 9 for discharging the mixed air flow from cooling air and vapor can be attached to the blow-out region 7 of the cross-flow fan 3.

Zur Montage ist der Querstromlüfter 3 mit einer Ansaugöffnung 10 für den Mündungsbereich 5 des Wrasenabzugskanals 6 auf einem Montageteil 11 angeordnet, wobei das Montageteil 11 hierfür eine zu der Ansaugöffnung 10 korrespondierend ausgebildete Öffnung aufweist. Das Montageteil 11 in seiner Funktionswirkung ist besser zu erkennen in der Figur 3. Der Querstromlüfter 3 ist mittels des Montageteils 11 auf einfache Weise an dem Rest des Backofens 1 befestigt.For mounting, the cross-flow fan 3 is arranged with a suction opening 10 for the mouth region 5 of the vapor withdrawal channel 6 on a mounting part 11, wherein the mounting part 11 for this purpose has a corresponding opening 10 to the suction port. The mounting part 11 in its functional effect is better seen in the FIG. 3 , Of the Cross-flow fan 3 is fixed by means of the mounting part 11 in a simple manner to the rest of the oven 1.

Zur Erläuterung des erfindungsgemäßen Gedankens ist in der Figur 2 der Querstromlüfter 3 in isolierter Darstellung gezeigt. Dabei ist der Mantelbereich 12 des Querstromlüfters 3 mit Buchstaben von "A" bis "L" versehen. Diese Buchstaben bezeichnen die Druck-Messstellen von durchgeführten Versuchen und sind in dem darunter stehenden Diagrammen von "A" bis "L" ebenfalls auf der X-Achse aufgetragen. Auf der Y-Achse sind die Druck-Gegebenheiten, also Überdruck bzw. Unterdruck, angegeben, die sich einstellen bei Maximaldrehzahl des Querstromlüfters 3. So ist deutlich zu erkennen, dass der Bereich von "A" bis etwa "D" des Ausblasbereiches 7 eine Saugzone darstellt. Genau in diesen Bereich befindet sich der Mündungsbereich 5 des Wrasenabzugskanals 6 und zwar hier unmittelbar in der Nähe des Ausblasbereiches 7 des Querstromlüfters 3, also im Bereich zwischen der ersten und dritten Messstelle aus dem Versuch. Somit kann eine einfache Anbindung des Wrasenabzugskanals 6, der letztlich nur noch eine Öffnung zur Backmuffel 2 aufweisen muss, an den Querstromlüfter 3 erfolgen. Aufwendige Konstruktionen erübrigen sich dadurch.To explain the inventive concept is in the FIG. 2 the cross-flow fan 3 shown in isolation. In this case, the jacket region 12 of the cross-flow fan 3 is provided with letters from "A" to "L". These letters indicate the pressure measurement points of tests performed and are also plotted on the x-axis in the diagrams below, from "A" to "L". On the Y-axis, the pressure conditions, ie overpressure or negative pressure, indicated that set at maximum speed of the cross-flow fan 3. Thus, it can be clearly seen that the range from "A" to about "D" of the blow-out 7 a Represents suction zone. Exactly in this area is the mouth region 5 of the vapor extraction channel 6 and that here directly in the vicinity of the blow-out area 7 of the cross-flow fan 3, ie in the area between the first and third measuring point from the experiment. Thus, a simple connection of the vapor extraction channel 6, which ultimately only has to have an opening to the baking muffle 2, made to the cross-flow fan 3. Elaborate constructions are unnecessary.

Die Figur 4 zeigt eine weitere Grafik, wobei in der Grafik ebenfalls auf der X-Achse die Messpunkte "A" bis "L" der Mantelfläche 12 des Querstromlüfters 3 aufgetragen sind, wobei die durchgezogene Linie das Saug- Druckverhalten des Querstromlüfters 3 darstellt, wenn er mit seiner Maximaldrehzahl betrieben wird. Erkennbar ist in der Grafik ein Saugvermögen des Querstromlüfters 3 in dem Bereich zwischen der ersten und vierten Messstelle. Wird die Lüfterdrehzahl gemindert, was an Hand der gestrichelten Linie dargestellt ist, so ergibt sich auch in dem Bereich der ersten bis vierten Messstelle "A" bis "D" ein Druckbereich.The FIG. 4 shows a further graph, wherein in the graph on the X-axis, the measuring points "A" to "L" of the lateral surface 12 of the cross-flow fan 3 are plotted, wherein the solid line represents the suction pressure behavior of the cross-flow fan 3, if he with his Maximum speed is operated. Recognizable in the graph is a pumping speed of the cross-flow fan 3 in the region between the first and fourth measuring point. If the fan speed is reduced, as shown by the dashed line, the result is also in the range of the first to fourth measuring point "A" to "D" a pressure range.

Deshalb ist es wichtig, dass zur Absaugung von Wrasen, also während eines Garvorgangs, eine Mindestdrehzahl des Lüfterrades 8 gewährleistet ist, damit in dem Mündungsbereich 5 des Wrasenabzugskanals 6 zumindest der für eine Absaugung erforderliche Unterdruck herrscht. Diese Mindestdrehzahl variiert stark in Abhängigkeit des verwendeten Backofentyps und muss deshalb empirisch ermittelt werden.Therefore, it is important that for the extraction of vapors, ie during a cooking process, a minimum speed of the impeller 8 is ensured so that in the mouth region 5 of the vapor extraction channel 6 at least the vacuum required for a suction prevails. This minimum speed varies greatly depending on the type of oven used and must therefore be determined empirically.

Claims (5)

  1. Baking oven (1) comprising a baking muffle (2) and a cross-flow fan (3) having a fan wheel (8), the cross-flow fan (3), together with a connected cooling air duct (4), generating a cooling air stream, which is carried away to the outside, and a vapour exhaust duct (6) opening into the cooling air duct (4), through which vapour exhaust duct the vapour can be evacuated from the baking muffle (2), the cross-flow fan (3) having an exhaust region (7), characterised in that an exhaust area (A, ..., D) develops in the external-surface region (12) of the cross-flow fan (3) in the vicinity of the exhaust region (7) when the fan wheel (8) is at a minimum speed, in which area the opening region (5) of the vapour exhaust duct (6) is located.
  2. Baking oven according to claim 1, characterised in that the housing of the cross-flow fan (3) has a suction opening (10) in the vicinity of the exhaust region (7), to which opening the vapour exhaust duct (6) is coupled.
  3. Baking oven according to claims 1 and 2, characterised in that the opening region (5) is arranged downstream of the fan wheel (8) in the flow direction of the cooling air stream.
  4. Baking oven according to claims 1 to 3, characterised in that an exhaust air duct (9) for carrying away the mixed air stream made up of cooling air and vapour is connected to the exhaust region (7) of the cross-flow fan (3).
  5. Baking oven according to claims 1 to 4, characterised in that the cross-flow fan (3) having the suction opening (10) for the opening region (5) of the vapour exhaust duct (6) is arranged on an assembly part (11), the assembly part (11) having an opening for this purpose.
EP07018245.6A 2006-10-05 2007-09-18 Baking oven with a muffle and a cross-flow ventilator Not-in-force EP1909037B1 (en)

Applications Claiming Priority (1)

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DE200610047587 DE102006047587A1 (en) 2006-10-05 2006-10-05 Oven with a baking muffle and a cross-flow fan

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EP1909037A2 EP1909037A2 (en) 2008-04-09
EP1909037A3 EP1909037A3 (en) 2010-12-22
EP1909037B1 true EP1909037B1 (en) 2015-11-11

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USD787041S1 (en) 2015-09-17 2017-05-16 Whirlpool Corporation Gas burner
US10837651B2 (en) 2015-09-24 2020-11-17 Whirlpool Corporation Oven cavity connector for operating power accessory trays for cooking appliance
US11777190B2 (en) 2015-12-29 2023-10-03 Whirlpool Corporation Appliance including an antenna using a portion of appliance as a ground plane
US10145568B2 (en) 2016-06-27 2018-12-04 Whirlpool Corporation High efficiency high power inner flame burner
US10551056B2 (en) 2017-02-23 2020-02-04 Whirlpool Corporation Burner base
US10451290B2 (en) 2017-03-07 2019-10-22 Whirlpool Corporation Forced convection steam assembly
US10660162B2 (en) 2017-03-16 2020-05-19 Whirlpool Corporation Power delivery system for an induction cooktop with multi-output inverters
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EP1909037A2 (en) 2008-04-09
US8950389B2 (en) 2015-02-10
DE102006047587A1 (en) 2008-04-10
US20080083400A1 (en) 2008-04-10
EP1909037A3 (en) 2010-12-22

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