EP1176368B1 - Baking oven - Google Patents

Baking oven Download PDF

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Publication number
EP1176368B1
EP1176368B1 EP01118307A EP01118307A EP1176368B1 EP 1176368 B1 EP1176368 B1 EP 1176368B1 EP 01118307 A EP01118307 A EP 01118307A EP 01118307 A EP01118307 A EP 01118307A EP 1176368 B1 EP1176368 B1 EP 1176368B1
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EP
European Patent Office
Prior art keywords
baking
baking oven
recess
air
vanes
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EP01118307A
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German (de)
French (fr)
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EP1176368A2 (en
EP1176368A3 (en
Inventor
Gerd Müsel
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RZEMIENIUK Bernhard
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RZEMIENIUK Bernhard
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Publication of EP1176368A3 publication Critical patent/EP1176368A3/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 an oven, comprising a baking chamber, a forced air fan driven by an electric motor, on its carrier disc a number related to the fan wheel axis running in the radial direction, towards the front Shovels aligned towards the baking chamber is attached Heat exchangers and water supply devices as well of fresh and cooling air.
  • Such ovens are for example in EP 0 386 862 B1, EP 0 926 449 B1 or US 6,023,050. These ovens have a planar motor wall in which a motor for Driving a forced air fan is provided on the has a carrier plate facing the baking chamber.
  • a separate blading is used for the air supply in EP 0 386 862 B1 needed, while in EP 0 926 449 B1 the air supply at a point where the highest is not Intake vacuum is present in the air circulation fan.
  • EP 0 926 449 B1 one is used to moisten at least partially Steam-filled cooking space of a steam cooking appliance or a hot air-steam mixture by means of a fan wheel Radial fan circulated in the cooking space.
  • a fan wheel Radial fan circulated in the cooking space.
  • On the carrier disc of the fan wheel are radial in relation to the fan wheel axis Direction towards the front towards the baking chamber Shovels attached.
  • the central Area of the fan wheel the gas mixture to be circulated essentially through openings in which deflectors are provided are sucked in axially and directed radially outwards.
  • Excess steam or excess hot air / steam mixture is drained from the cooking space through an exhaust air opening. Dry fresh air from outside is used for dehumidification fed on the rear above the axis of rotation of the fan wheel, by provided in the rear end of the fan wheel Opened openings and by means of deflection devices the fan wheel is deflected outwards.
  • the object of the invention is to design an oven in such a way that the heat exchanger through the circulated, fat droplets entrained air flow, is contaminated as little as possible and also regulates the fresh air drawn into the baking chamber is fed.
  • this object is characterized by the features in characterizing part of claim 1 solved.
  • advantageous Further training is the subject of subclaims.
  • FIG 1 is a preferred in a schematic longitudinal section Embodiment of a whole designated 1 Oven shown with outer jacket 2.
  • Oven 1 has a baking space 3 which is connected to an oven door 6 is accessible.
  • the baking room 3 are schematic baking containers 5 arranged one above the other for receiving baking foods indicated.
  • a drive for a circulating air fan 11 an electric motor 10 is provided.
  • a hub 11a of the circulating air fan 11 attached, which in turn also is referred to as a washer carrier plate 11b attached.
  • Buckets 11c are provided which are approximately parallel in number go to the axis 12 extending blades 11d.
  • the number of radially extending blades 11c can be the same, smaller and / or larger than the number of axially extending Be blades 11d.
  • an electric motor adjustable disc 11e provided that about the same diameter as the carrier disc 11b and about that same number, for example arranged in the same position, preferably equally sized openings such has those in the support plate 11b.
  • an approx vertically aligned air baffle 17 is arranged between the actual Baking chamber 3 and the fan 11. Further a heat exchanger is arranged in the area of the circulating air fan wheel 11.
  • FIG 2 is also in a schematic longitudinal section an oven designated in its entirety with 1 ', which is a modification of the embodiment of the in Fig.1 oven 1 shown.
  • the main difference is that the drive motor 10 is not in one Recess is housed, which is why the oven 1 ' has a greater depth.
  • this also results in a adequate suction negative pressure is generated in the recess 9.
  • About the more or less wide open or, if necessary fully closed openings in the carrier disc 11b and the disk 11d associated therewith can over it in addition, for example, by electromotive adjustment of the Disc 11d in relation to the carrier disc 11b the suction vacuum and at the same time the amount supplied Fresh air can be regulated or shut off accordingly.
  • locking mechanism for Control of the amount of fresh air may be provided. After mixing the fresh air with that in the baking chamber 3 climate becomes excess air through the outlet 7 to the outside blown.
  • the baking climate can also be from outside the baking chamber 3 provided (not shown) steam generator generated and steam directed into the baking chamber and / or also through in the baking chamber 3 by injecting and evaporating the Water supplied via the pipeline 15 on the heat exchanger 16 developed steam can be humidified.
  • the injection water intended for evaporation is over the pipe 15 and the opening 15a to the axially aligned Blades 11d passed through which the supplied Water is atomized and transported to the heat exchanger 16, whereupon the water evaporates.
  • the water supply line 15 By laying the water supply line 15 in the interior of the recess 9, in which the temperature is much lower than in the baking room 3, is a heating and thus a quick calcification and possibly clogging the water supply line 15 as well how excluded. That is, due to the advantageous Laying the water supply line 15 outside the baking chamber 3 there is free water flow.
  • Figure 3 is also in a schematic longitudinal section an embodiment of an oven 1 "shown, in which the line 15 for water supply and the lines 14 for the supply of cooling air.
  • this embodiment is otherwise, as in the embodiments in Fig.1 and 2, in the space between the outer jacket of the Motor 10 and the side of the recess facing the motor 9 a thermal not shown in the drawings Insulation attached.

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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)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

Blades (11c) are fitted to and supported by the fan rotor disc (11b). They face the front of the oven chamber (3) and lie parallel with the rotor (11) axis (12). The blades (11d) continue parallel to the axis, towards the oven rear (2a).

Description

Die Erfindung betrifft einen Backofen, umfassend einen Backraum, ein von einem Elektromotor angetriebenes Umluftlüfterrad, an dessen Trägerscheibe eine Anzahl bezogen auf die Lüfterradachse in radialer Richtung verlaufender, nach vorne zum Backraum hin ausgerichteter Schaufeln angebracht ist, einen Wärmetauscher sowie Einrichtungen zum Zuführen von Wasser sowie von Frisch- und Kühlluft.The invention relates to an oven, comprising a baking chamber, a forced air fan driven by an electric motor, on its carrier disc a number related to the fan wheel axis running in the radial direction, towards the front Shovels aligned towards the baking chamber is attached Heat exchangers and water supply devices as well of fresh and cooling air.

Derartige Backöfen sind beispielsweise in EP 0 386 862 B1, EP 0 926 449 B1 oder US 6,023,050 beschrieben. Diese Backöfen weisen eine planare Motorwand auf, in welcher ein Motor zum Antreiben eines Umluftlüfterrads vorgesehen ist, das an der dem Backraum zugewandten Seite eine Trägerplatte aufweist.Such ovens are for example in EP 0 386 862 B1, EP 0 926 449 B1 or US 6,023,050. These ovens have a planar motor wall in which a motor for Driving a forced air fan is provided on the has a carrier plate facing the baking chamber.

In US 6,023,050 ist ferner zum Verdampfen bestimmtes Wasser durch eine im Garraum verlegte Leitung geführt, was den Nachteil hat, daß diese Leitung zum einen einen Widerstand für die Luftströmung darstellt und zum anderen durch im Wasser vorhandenen Kalk bei den hohen im Garraum herrschenden Temperaturen leicht und schnell verstopft werden kann.In US 6,023,050 is also water intended for evaporation led through a line laid in the cooking space, which is the disadvantage has on the one hand a resistance for represents the air flow and the other through in the water existing lime at the high temperatures in the cooking space can be clogged easily and quickly.

Zur Luftzuführung wird in EP 0 386 862 B1 eine separate Beschaufelung benötigt, während in EP 0 926 449 B1 die Luftzufuhr an einer Stelle erfolgt, an welcher nicht der höchste Ansaugunterdruck dem Umluftlüfterrads vorliegt.A separate blading is used for the air supply in EP 0 386 862 B1 needed, while in EP 0 926 449 B1 the air supply at a point where the highest is not Intake vacuum is present in the air circulation fan.

In EP 0 926 449 B1 wird zum Befeuchten eines zumindest teilweise mit Dampf gefüllten Garraums eines Dampfgargeräts Dampf bzw. ein Heißluft-Dampfgemisch mittels eines Lüfterrades eines Radialgebläses im Garraum umgewälzt. An der Trägerscheibe des Lüfterrads sind bezogen auf die Lüfterradachse in radialer Richtung verlaufende nach vorne zum Backraum hin ausgerichtete Schaufeln angebracht. Hierbei wird in dem zentralen Bereich des Lüfterrads das umzuwälzende Gasgemisch im wesentlichen über Öffnungen, in denen Ablenkeinrichtungen vorgesehen sind, axial angesaugt und radial nach außen geleitet. In EP 0 926 449 B1 one is used to moisten at least partially Steam-filled cooking space of a steam cooking appliance or a hot air-steam mixture by means of a fan wheel Radial fan circulated in the cooking space. On the carrier disc of the fan wheel are radial in relation to the fan wheel axis Direction towards the front towards the baking chamber Shovels attached. Here, the central Area of the fan wheel, the gas mixture to be circulated essentially through openings in which deflectors are provided are sucked in axially and directed radially outwards.

Überschüssiger Dampf bzw. überschüssiges Heißluft-Dampfgemisch wird über eine Abluftöffnung aus dem Garraum abgelassen. Zur Entfeuchtung wird trockene Frischluft von außen oberhalb der Drehachse des Lüfterrades rückseitig zugeführt, durch in der rückwärtigen Stirnseite des Lüfterrads vorgesehene Öffnungen angesaugt und mittels Ablenkeinrichtungen mittels des Lüfterrades nach außen abgelenkt.Excess steam or excess hot air / steam mixture is drained from the cooking space through an exhaust air opening. Dry fresh air from outside is used for dehumidification fed on the rear above the axis of rotation of the fan wheel, by provided in the rear end of the fan wheel Opened openings and by means of deflection devices the fan wheel is deflected outwards.

Aufgabe der Erfindung ist es, einen Backofen so zu gestalten, daß der Wärmetauscher durch den umgewälzten, Fetttröpfchen mitführenden Luftstrom, möglichst wenig verschmutzt wird und ferner die in den Backraum angesaugte Frischluft reguliert zugeführt wird.The object of the invention is to design an oven in such a way that the heat exchanger through the circulated, fat droplets entrained air flow, is contaminated as little as possible and also regulates the fresh air drawn into the baking chamber is fed.

Gemäß der Erfindung ist diese Aufgabe durch die Merkmale im kennzeichnenden Teil des Anspruchs 1 gelöst. Vorteilhafte Weiterbildungen sind Gegenstand von Unteransprüchen.According to the invention, this object is characterized by the features in characterizing part of claim 1 solved. advantageous Further training is the subject of subclaims.

Nachstehend wird die Erfindung anhand von bevorzugten Ausführungsformen unter Bezugnahme auf die anliegenden Zeichnungen im einzelnen erläutert. Es zeigen:

Fig.1
einen schematischen Längsschnitt einer bevorzugten Ausführungsform eines Backofens;
Fig.2
einen schematischen Längsschnitt einer Abwandlung der Ausführungsform des Backofens in Fig.1, und
Fig.3
ebenfalls einen schematischen Längsschnitt einer Ausführungsform eines Backofens ohne Wasser- und Frischluftzufuhr sowie ohne zusätzliche Motorkühlung.
In the following, the invention is explained in detail by means of preferred embodiments with reference to the attached drawings. Show it:
Fig.1
a schematic longitudinal section of a preferred embodiment of an oven;
Fig.2
a schematic longitudinal section of a modification of the embodiment of the oven in Figure 1, and
Figure 3
also a schematic longitudinal section of an embodiment of an oven without water and fresh air supply and without additional engine cooling.

In Fig.1 ist in einem schematischen Längsschnitt eine bevorzugte Ausführungsform eines in seiner Gesamtheit mit 1 bezeichneten Backofens mit Außenmantel 2 dargestellt. In dem Backofen 1 ist ein Backraum 3 vorgesehen, der über eine Backofentür 6 zugänglich ist. In dem Backraum 3 sind schematisch übereinander angeordnete Backbehälter 5 zum Aufnehmen von zu backenden Lebensmitteln angedeutet.In Figure 1 is a preferred in a schematic longitudinal section Embodiment of a whole designated 1 Oven shown with outer jacket 2. By doing Oven 1 has a baking space 3 which is connected to an oven door 6 is accessible. In the baking room 3 are schematic baking containers 5 arranged one above the other for receiving baking foods indicated.

Im Bodenbereich des Backraums3 weist dieser einen Auslaß 7 auf. Waagrecht verlaufende obere und untere Abschnitte eines Backraummantels 4 gehen in eine etwa senkrecht verlaufende Motorwand 8 über, in welcher eine Vertiefung 9 ausgebildet ist, die in dem schematischen Längsschnitt etwa die Form eines sich zur Rückwand 2a des Backofenaußenmantels 2 öffnendes Rechteck aufweist.In the bottom area of the baking chamber 3, this has an outlet 7 on. Horizontal upper and lower sections of a Baking chamber jacket 4 go into an approximately vertical Motor wall 8 in which a recess 9 is formed is in the schematic longitudinal section approximately the shape of a opening to the rear wall 2a of the oven outer casing 2 Rectangle.

In der Vertiefung 9 ist als Antrieb eines Umluftlüfterrads 11 ein Elektromotor 10 vorgesehen. Auf der nicht näher bezeichneten Abtriebswelle des Elektromotors 10 (mit einer strichpunktiert angedeuteten Achse 12) ist eine Nabe 11a des Umluftlüfterrads 11 befestigt, an welcher wiederum eine auch als Rondell bezeichnete Trägerscheibe 11b befestigt ist.In the recess 9 is a drive for a circulating air fan 11 an electric motor 10 is provided. On the unspecified Output shaft of the electric motor 10 (with a dash-dot line indicated axis 12) is a hub 11a of the circulating air fan 11 attached, which in turn also is referred to as a washer carrier plate 11b attached.

An der Trägerscheibe 11b sind eine Anzahl radial verlaufender Schaufeln 11c vorgesehen, die in eine Anzahl etwa parallel zur Achse 12 verlaufender Schaufeln 11d übergehen. Hierbei kann die Anzahl der radial verlaufenden Schaufeln 11c gleich, kleiner und/oder größer als die Anzahl der axial verlaufenden Schaufeln 11d sein.There are a number of radially extending ones on the carrier disk 11b Buckets 11c are provided which are approximately parallel in number go to the axis 12 extending blades 11d. in this connection the number of radially extending blades 11c can be the same, smaller and / or larger than the number of axially extending Be blades 11d.

In der Trägerscheibe 11b sind eine Anzahl kreisförmiger, rechteckiger, polygonaler oder ähnlich geformter Öffnungen ausgebildet. Vorzugsweise zwischen der Trägerscheibe 11b und dem parallel zur Rückwand 2a des Backofenaußenmantels 2 verlaufenden Mantelabschnitt 9a der Vertiefung 9 ist eine elektromotorisch verstellbare Scheibe 11e vorgesehen, die etwa denselben Durchmesser wie die Trägerscheibe 11b und etwa die gleiche Anzahl beispielsweise in der gleichen Position angeordnete, vorzugsweise gleich dimensionierte Öffnungen wie diejenigen in der Trägerplatte 11b aufweist. Zwischen dem eigentlichen Backraum 3 und dem Umluftlüfterrad 11 ist ein etwa senkrecht ausgerichtetes Luftleitblech 17 angeordnet. Ferner ist im Bereich des Umluftlüfterrads 11 ein Wärmetauscher angeordnet.A number of circular, rectangular, polygonal or similarly shaped openings educated. Preferably between the carrier plate 11b and the one running parallel to the rear wall 2a of the outer jacket 2 of the oven Jacket section 9a of the recess 9 is an electric motor adjustable disc 11e provided that about the same diameter as the carrier disc 11b and about that same number, for example arranged in the same position, preferably equally sized openings such has those in the support plate 11b. Between the actual Baking chamber 3 and the fan 11 is an approx vertically aligned air baffle 17 is arranged. Further a heat exchanger is arranged in the area of the circulating air fan wheel 11.

In der schematischen Darstellung der Fig.1 ist im oberen Bereich der Vertiefung 9 in der Motorwandung 8 eine Rohrleitung 13 zur Frischluftzufuhr vorgesehen durch das über eine Öffnung 13a Frischluft in den Backraumbereich geleitet wird. Etwa spiegelbildlich zur Achse 12 ist im unteren Bereich der Vertiefung 9 eine Rohrleitung 15 zur Wasserzufuhr vorgesehen. Unter der Rohrleitung 13 sowie über der Rohrleitung 15 sind jeweils Rohrleitungen 14 vorgesehen, über welche Kühlluft von außen angesaugt wird, durch welche nicht nur der Antriebsmotor 10, sondern auch die in der Vertiefung 9 angeordneten Rohrleitungen 13 und 15 gekühlt werden.In the schematic representation of Figure 1 is in the upper area the recess 9 in the motor wall 8 a pipe 13 provided for fresh air supply through the opening 13a fresh air is directed into the baking area. Approximately The mirror image of axis 12 is in the lower area Well 9 a pipe 15 is provided for water supply. Below the pipe 13 and above the pipe 15 are In each case, pipes 14 are provided, via which cooling air from is sucked in outside, through which not only the drive motor 10, but also those arranged in the recess 9 Pipelines 13 and 15 are cooled.

In Fig.2 ist ebenfalls in einem schematischen Längsschnitt ein in seiner Gesamtheit mit 1' bezeichneter Backofen dargestellt, der eine Abwandlung der Ausführungsform des in Fig.1 dargestellten Backofens 1 darstellt. Der wesentliche Unterschied besteht darin, daß der Antriebsmotor 10 nicht in einer Vertiefung untergebracht wird, weshalb auch der Backofen 1' eine größere Bautiefe aufweist.In Figure 2 is also in a schematic longitudinal section an oven designated in its entirety with 1 ', which is a modification of the embodiment of the in Fig.1 oven 1 shown. The main difference is that the drive motor 10 is not in one Recess is housed, which is why the oven 1 ' has a greater depth.

Da der Antriebsmotor 10 nicht in einem der Vertiefung 9 in Fig.1 entsprechenden Raum untergebracht ist, braucht auch keine Kühlluft - wie in Fig.1 über die Rohrleitungen 14 - zugeführt zu werden. Im übrigen entspricht diese Ausführungsform in ihrer Funktionsweise im wesentlichen derjenigen der Fig. 1.Since the drive motor 10 is not in one of the recess 9 in Fig.1 corresponding space is also needed no cooling air - as in Fig.1 via the pipes 14 - supplied to become. Otherwise this embodiment corresponds in their functioning essentially that of Fig. 1.

Aufgrund der vorteilhaften Gestaltung der Beschaufelung des Umluftlüfters 11 in Form der Anzahl radial verlaufender Schaufeln 11c sowie der axial ausgerichteten Schaufeln 11d wird in vorteilhafter Weise ein Ansaugunterdruck, insbesondere in dem Raum zwischen Umluftlüfterrad 11 und Luftleitblech 17 erzeugt.Due to the advantageous design of the blading of the Air circulation fan 11 in the form of the number of radially running Buckets 11c and the axially aligned blades 11d is advantageously an intake vacuum, in particular in the space between air circulation fan 11 and air baffle 17 generated.

Bei der Ausführungsform gemäß Fig.1 wird hierdurch auch ein angemessener Ansaugunterdruck in der Vertiefung 9 erzeugt. Über die mehr oder weniger weit geöffneten bzw. gegebenenfalls vollständig geschlossenen Öffnungen in der Trägerscheibe 11b und der dieser zugeordneten Scheibe 11d kann darüber hinaus beispielsweise durch elektromotorische Verstellung der Scheibe 11d in Relation zu der Trägerscheibe 11b der Ansaugunterdruck und damit gleichzeitig die zugeführte Menge an Frischluft entsprechend reguliert bzw. abgesperrt werden.In the embodiment according to FIG. 1, this also results in a adequate suction negative pressure is generated in the recess 9. About the more or less wide open or, if necessary fully closed openings in the carrier disc 11b and the disk 11d associated therewith can over it in addition, for example, by electromotive adjustment of the Disc 11d in relation to the carrier disc 11b the suction vacuum and at the same time the amount supplied Fresh air can be regulated or shut off accordingly.

Gleichzeitig wird dadurch auch die zum Trocknen des Klimas im Backraum 3 benötigte Frischluft über die Rohrleitung 13 und die Öffnung 13a zugeführt.At the same time, it also helps dry the climate in the Baking chamber 3 needed fresh air via the pipeline 13 and the opening 13a supplied.

Ferner kann in der Frischluftzuführleitung 13 ein in den Zeichnungen nicht dargestellter Verschlußmechanismus zum Steuern der Frischluftmenge vorgesehen sein. Nach einem Vermischen der Frischluft mit dem im Backraum 3 herrschenden Klima wird überschüssige Luft durch den Auslaß 7 nach außen geblasen.Furthermore, in the fresh air supply line 13 in the Drawings not shown locking mechanism for Control of the amount of fresh air may be provided. After mixing the fresh air with that in the baking chamber 3 Climate becomes excess air through the outlet 7 to the outside blown.

Das Backklima kann ferner durch von einem außerhalb des Backraums 3 vorgesehenen (nicht dargestellten) Dampferzeuger erzeugten und in den Backraum geleiteten Dampf und/oder auch durch den im Backraum 3 durch Einspritzen und Verdampfen des über die Rohrleitung 15 zugeführten Wassers auf dem Wärmetauscher 16 entwickelten Dampf befeuchtet werden.The baking climate can also be from outside the baking chamber 3 provided (not shown) steam generator generated and steam directed into the baking chamber and / or also through in the baking chamber 3 by injecting and evaporating the Water supplied via the pipeline 15 on the heat exchanger 16 developed steam can be humidified.

Hierzu wird das zum Verdampfen bestimmte Einspritzwasser über die Rohrleitung 15 und die Öffnung 15a auf die axial ausgerichteten Schaufeln 11d geleitet, durch welche das zugeführte Wasser zerstäubt und zum Wärmetauscher 16 befördert wird, worauf das Wasser verdampft. Durch die Verlegung der Wasserzuführleitung 15 in den Innenraum der Vertiefung 9, in welcher die Temperatur wesentlich niedriger ist als im Backraum 3, ist eine Erwärmung und somit ein schnelles Verkalken und gegebenenfalls Verstopfen der Wasserzuführleitung 15 so gut wie ausgeschlossen. Das heißt, aufgrund der vorteilhaften Verlegung der Wasserzuführleitung 15 außerhalb des Backraums 3 ist ein freier Wasserdurchsatz gegeben.For this purpose, the injection water intended for evaporation is over the pipe 15 and the opening 15a to the axially aligned Blades 11d passed through which the supplied Water is atomized and transported to the heat exchanger 16, whereupon the water evaporates. By laying the water supply line 15 in the interior of the recess 9, in which the temperature is much lower than in the baking room 3, is a heating and thus a quick calcification and possibly clogging the water supply line 15 as well how excluded. That is, due to the advantageous Laying the water supply line 15 outside the baking chamber 3 there is free water flow.

Wie in Fig.2 durch eine mit Punkten versehene Linie angedeutet, ist durch die radial verlaufenden, zum Backraum 3 hin ausgerichteten Schaufeln 11c erreicht, daß der größte Teil der mit Fetttröpfchen angereicherten umgewälzten Luft an dem Wärmetauscher 16 vorbei geleitet wird, so daß dieser im Vergleich zu den bisher bekannt gewordenen Ausführungsformen erheblich weniger verunreinigt wird und damit auch die Rauchentwicklung größtenteils unterbunden ist.As indicated in FIG. 2 by a line provided with dots, is through the radially extending towards the baking chamber 3 aligned blades 11c reaches that most of the circulating air enriched with fat droplets on the Heat exchanger 16 is passed over, so that this in comparison to the previously known embodiments considerably is less contaminated and with it the smoke development is largely prevented.

Dieser Verlauf des durch Fetttröpfchen angereicherten und durch die radial ausgerichteten Schaufeln 11c nach außen beförderten Luftstrom ist durch die mit kleinen, die Fetttröpfchen andeutenden Punkten versehene dünne Linie in Fig.2 angezeigt.This course of the and enriched by fat droplets transported outwards by the radially aligned blades 11c Airflow is through those with small, fat droplets indicated thin lines indicated in Fig.2.

In Fig.3 ist ebenfalls in einem schematischen Längsschnitt eine Ausführungsform eines Backofens 1" dargestellt, bei welchem die Leitung 15 zur Wasserzufuhr sowie die Leitungen 14 zur Zufuhr von Kühlluft entfallen sind. Bei dieser Ausführungsform ist im übrigen, ebenso wie bei den Ausführungsformen in Fig.1 und 2, in den Raum zwischen dem Außenmantel des Motors 10 und der dem Motor zugewandten Seite der Vertiefung 9 eine thermische in den Zeichnungen nicht näher dargestellte Isolierung angebracht.In Figure 3 is also in a schematic longitudinal section an embodiment of an oven 1 "shown, in which the line 15 for water supply and the lines 14 for the supply of cooling air. In this embodiment is otherwise, as in the embodiments in Fig.1 and 2, in the space between the outer jacket of the Motor 10 and the side of the recess facing the motor 9 a thermal not shown in the drawings Insulation attached.

Die Vorteile eines gemäß der Erfindung ausgeführten Backofens können folgendermaßen zusammengefaßt werden:

  • a) Ein Ansammeln von Fett und ähnlichen Verschmutzungen an dem Wärmetauscher 16 ist durch die vorteilhafte Ausgestaltung des Umluftlüfterrads 11, insbesondere mittels der an seiner dem Backraum 3 zugewandten Seite vorgesehenen, radial verlaufenden Schaufeln 11c weitgehend unterbunden.
  • b) Zum Trocknen des Backklimas im Backraum 3 bestimmte Frischluft wird über die Öffnung 13a zugeführt, wobei dadurch die mittels des Umluftlüfterrads 11 erreichte Ansaugwirkung optimal genutzt wird.
  • c) Da das zum Verdampfen bestimmte Wasser durch die in der Vertiefung 9 untergebrachte Wasserzuführleitung 15 erfolgt, ist die Gefahr einer Verkalkung der Leitung aufgrund von Erwärmung weitgehend ausgeschlossen.
    • The advantages of an oven designed according to the invention can be summarized as follows:
  • a) Accumulation of grease and similar contaminants on the heat exchanger 16 is largely prevented by the advantageous design of the circulating air fan wheel 11, in particular by means of the radially extending blades 11c provided on its side facing the baking chamber 3.
  • b) Fresh air intended for drying the baking climate in the baking chamber 3 is supplied via the opening 13a, the suction effect achieved by means of the circulating air fan wheel 11 thereby being optimally used.
  • c) Since the water intended for evaporation takes place through the water supply line 15 accommodated in the recess 9, the risk of calcification of the line due to heating is largely excluded.

    • Claims (5)

    1. A baking oven (1, 1') comprising a baking space (3), an air circulating fan (11) powered by an electric motor (10), the wheel disk (11b) of said air circulating fan mounting a number of vanes (11c) oriented radially relative to the fan wheel centerline (12) facing forwards in the direction of said baking space (3), a heat exchanger (16) as well as means (13, 14, 15) for supplying water as well as fresh air and cooling air, characterized in that a number of vanes (11d) oriented parallel to said fan wheel centerline (12) facing substantially in the direction of the baking oven rear side (2a) are mounted next externally to said vanes (11c) oriented forwards in the direction of said baking space, that a rotatable disk (11e) is provided very near and parallel to said wheel disk (11b) roughly of the same size as said wheel disk (11b) for regulating the fresh air drawn into said baking space, and that ports roughly the same in number and preferably dimensioned the same are configured in both disks (11b, 11e).
    2. The baking oven as set forth in claim 1, characterized in that the number of vanes (11d) oriented parallel to said fan wheel centerline (12) facing rearwards is the same, fewer or more than the number of vanes (11c) oriented radially.
    3. The baking oven as set forth in claim 1 or claim 2, characterized in that said disk (11e) is adjustable by electric motor.
    4. The baking oven as set forth in any of the preceding claims, characterized in that said drive (12) of said air circulating fan (11) is accommodated in a recess (9) open to the rear side of said baking oven, that said air circulating fan (11) is disposed outside of said recess (9) at the side facing said baking space (3), and that said means (13, 14, 15) for supplying fresh air and cooling air as well as water are arranged in said recess (9) and thus outside of said baking space zone so that fresh air and water are supplied to said baking space zone via ports (13a, 15a) in the outer shell of said recess (9).
    5. The baking oven as set forth in any of the claims 1 to 3, characterized in that the motor wall (8) comprises no recess in thus being located roughly parallel to the door (6) of the baking oven.
    EP01118307A 2000-07-27 2001-07-27 Baking oven Expired - Lifetime EP1176368B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE10036581 2000-07-27
    DE10036581A DE10036581A1 (en) 2000-07-27 2000-07-27 Oven with recess for fan drive

    Publications (3)

    Publication Number Publication Date
    EP1176368A2 EP1176368A2 (en) 2002-01-30
    EP1176368A3 EP1176368A3 (en) 2002-05-22
    EP1176368B1 true EP1176368B1 (en) 2004-10-20

    Family

    ID=7650392

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP01118307A Expired - Lifetime EP1176368B1 (en) 2000-07-27 2001-07-27 Baking oven

    Country Status (4)

    Country Link
    EP (1) EP1176368B1 (en)
    AT (1) ATE280363T1 (en)
    CZ (1) CZ290387B6 (en)
    DE (2) DE10036581A1 (en)

    Families Citing this family (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    IT251758Y1 (en) * 2000-11-20 2004-01-20 Electrolux Professional Spa PERFECTED COOKING OVEN WITH DEFLECTOR FAN.
    DE202004015292U1 (en) * 2004-10-01 2006-02-09 Wss Gmbh Fresh air suction device for e.g. microwave apparatus, has circular opening that is concentric to drive shaft of motor driving radial fan and is connected with fresh air pipe via which fan concentrically sucks air
    DE102021107224A1 (en) 2021-03-23 2022-09-29 Rational Aktiengesellschaft Fan wheel for a cooking appliance and cooking appliance

    Family Cites Families (7)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    BE1001974A5 (en) * 1988-05-17 1990-05-02 Itt Ind Belgium Apparatus for cooking food.
    US4881519A (en) * 1988-07-18 1989-11-21 Lincoln Foodservice Products, Inc. Hot air oven having infra-red radiant surfaces
    DE8902903U1 (en) 1989-03-09 1989-08-10 Lechmetall Landsberg GmbH Edelstahlerzeugnisse, 8910 Landsberg Cooking appliance
    US5619983A (en) * 1995-05-05 1997-04-15 Middleby Marshall, Inc. Combination convection steamer oven
    EP0926449B2 (en) * 1997-12-23 2003-05-21 eloma GmbH Grossküchentechnik Method for dehumidifying a cooking room of a steam cooking apparatus and apparatus therefor
    FR2775760B1 (en) 1998-03-09 2000-05-05 Bourgeois Prod Coop STEAM OVEN WITH FIXED SPRAY OF SPRAY WATER
    DE19820067B4 (en) * 1998-05-06 2009-09-24 Werner & Pfleiderer Lebensmitteltechnik Gmbh Discharge for an oven

    Also Published As

    Publication number Publication date
    EP1176368A2 (en) 2002-01-30
    EP1176368A3 (en) 2002-05-22
    ATE280363T1 (en) 2004-11-15
    DE10036581A1 (en) 2002-02-14
    CZ20012743A3 (en) 2002-07-17
    CZ290387B6 (en) 2002-07-17
    DE50104183D1 (en) 2004-11-25

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