EP2522858A2 - Radial fan for suction hood - Google Patents

Radial fan for suction hood Download PDF

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Publication number
EP2522858A2
EP2522858A2 EP12166751A EP12166751A EP2522858A2 EP 2522858 A2 EP2522858 A2 EP 2522858A2 EP 12166751 A EP12166751 A EP 12166751A EP 12166751 A EP12166751 A EP 12166751A EP 2522858 A2 EP2522858 A2 EP 2522858A2
Authority
EP
European Patent Office
Prior art keywords
radial fan
fan according
partition plate
additional
collar
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.)
Granted
Application number
EP12166751A
Other languages
German (de)
French (fr)
Other versions
EP2522858A3 (en
EP2522858B1 (en
Inventor
Josef Wurm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2522858A2 publication Critical patent/EP2522858A2/en
Publication of EP2522858A3 publication Critical patent/EP2522858A3/en
Application granted granted Critical
Publication of EP2522858B1 publication Critical patent/EP2522858B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F04D17/162—Double suction pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
    • F04D17/025—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal comprising axial flow and radial flow stages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—Vanes

Definitions

  • the present invention relates to a radial fan according to the preamble of patent claim 1 and a domestic appliance according to the preamble of claim 9.
  • a cooking appliance in this case has a blower unit which comprises at least one motor arranged in an engine compartment. At least one fan arranged in the cooking space can be driven by means of a drive shaft guided through a dividing wall.
  • the blower unit has an additional delivery unit for generating a gas pressure sealing the engine compartment against vapor.
  • the invention has for its object to improve the radial fan from the prior art in its mode of action.
  • the additional delivery unit on air blades.
  • the air blades of the additional delivery unit cause an improved delivery rate, which is also well controlled by the geometric design of the air blades.
  • the entire volume of air sucked in by the additional delivery unit is preferably conveyed radially outwards via the main delivery unit.
  • the air blades of the additional delivery unit generate an air flow along an axis of rotation of the fan wheel.
  • the additional delivery unit is thus designed according to an axial fan.
  • a blow-out region of the additional delivery unit opens in the intake region of the main delivery unit.
  • the air blades of the additional delivery unit are at least partially disposed in an opening of the partition plate. This allows a particularly flat design of the radial fan especially in particular, if the additional feed unit does not project, or only slightly beyond the partition plate. Over the cross section of the opening, an air flow rate of the additional delivery unit is controllable.
  • the collar is arranged on the partition plate. This allows a compact design and also favors the formation of the radial fan as a plastic injection molded part.
  • the additional delivery unit is arranged within an opening bounded by the collar. This creates a defined, clearly delimited flow channel of the additional delivery unit. This flow channel can be easily coupled to adjacent flow channels with sufficient tightness.
  • the collar has a height of 2 to 10 mm, preferably from 3 to 8 mm. This allows a compact design of the radial fan and also ensures sufficient coverage in the event of immersion of the collar in an adjacent air duct. This overlap or overlap causes a seal and largely prevents the intake of false air.
  • the air blades of the auxiliary conveyor unit form a mechanical connection between a arranged along the central axis drive axle receiving and the partition plate, a material saving in the production of the radial fan is enabled.
  • the air blades form the sole mechanical connection between the drive axle receiving and the separating plate.
  • the air blades are arranged in two superimposed planes, whereby the air flow is increased again. In addition, this allows a more stable connection of the drive axle receptacle to the partition plate.
  • the invention relates to a household appliance with a radial fan according to the invention, wherein the collar dips into an intake duct.
  • a particularly dense interface can be achieved.
  • the partition plate of the radial fan has production due to a certain delay, or a certain flatness tolerance. This makes it necessary to maintain a certain minimum distance of the partition plate from, for example, a surface surrounding a suction hole of the household appliance. However, this required minimum distance causes a false air suction through a gap, which results between the surface surrounding the suction hole and the partition plate.
  • a collar which dips into the suction hole, or in the intake passage, such suction of false air is prevented.
  • the radial fan in FIG. 1 has a partition plate 2, in the center of a drive axle receiving 4 is arranged. This is sleeve-shaped and serves to receive a motor axis of a fan motor (not shown). For receiving the motor shaft, the drive axle receiving 4 has a receiving opening 5, in which the motor shaft (not shown) is inserted.
  • the drive axle receiving 4 is connected via four retaining webs 6 with the partition plate 2.
  • a main conveyor unit 8 is arranged in the form of air blades 10.
  • the air blades 10 of the main conveyor unit 8 extend from an outer periphery of the partition plate 2 radially inwardly in the direction of the drive axle receiving 4.
  • the air blades 10 of the main conveyor unit 8 are arcuately formed and have a height H.
  • the air blades 10 terminate in front of a circular opening 11, which is arranged in the middle of the partition plate 2 is and in the center of the drive axle receiving 4 forms.
  • the opening 11 has an additional delivery unit 12, which is formed by four air blades 14.
  • the air blades 14 are designed such that they cause an air flow in the direction of an axis 18.
  • the axis 18 forms the axis of rotation of the drive axle, or the entire radial fan.
  • FIG. 2 shows a formed on a bottom of the radial fan collar 16, whose inner diameter corresponds to the diameter of the opening 11.
  • the air blades 14 of the additional conveying unit 12 are arranged within the collar 16. In addition, they are each arranged centrally along an angle bisector in spaces 17 formed by the retaining webs 6. According to the stability requirements, it is also possible in an alternative embodiment (not shown) to form the retaining webs 6 likewise in the form of air blades 14.
  • the additional delivery unit 12 is composed of two rows of air blades 14, which are arranged with respect to the axis 18 in the axial direction spaced from each other.
  • the two rows of air blades 14 are arranged offset from one another in such a way that the resulting gaps between the air blades 14 are the same size.
  • the air blades 14 of the auxiliary conveyor unit 12 are inclined in both embodiments in the direction of the axis 18 so that they cause an air flow along the axis 18.
  • the representation in FIG. 3 schematically shows the built-in cooking appliance radial fan.
  • the radial fan serves to generate a cooling air flow LK, which is used for cooling a switch room of the cooking appliance (not shown).
  • the radial fan causes through its additional delivery unit 12 a removal of a Wrasens from a, surrounded by an insulation 23 oven muffle 19 of the cooking appliance.
  • the discharged vapor is mixed with the cooling air flow LK.
  • the cooling air flow LK which is conveyed radially outward into a blow-out region A via the main conveying unit 8, is formed by means of an intake region AH of the main delivery unit 8 arranged at the top.
  • the circular suction area AH of the main conveyor unit 8 is arranged centrally above the main conveyor unit 8.
  • the axis 18 forms the center of the intake AH.
  • a compressed air flow LW is additionally drawn in via an intake area AZ of the additional delivery unit 12.
  • the compressed air flow LW is conveyed by means of the air blades 14 of the additional delivery unit 12 to the main delivery unit 8 arranged above the separating plate 2.
  • the Wrasen Kunststoffstrom LW from the intake AZ of the additional delivery unit 12 and the cooling air flow LK result in a mixed air flow LM, which is conveyed via the blow-out A in a blow-out 22.
  • a gap S between the partition plate 2 and a cover plate 20 arranged on the insulation 23 can be chosen generously, since the collar 16 is designed such that it dips into the intake passage 21 and thereby largely prevents the intake of a faulty air via the gap S.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The radial fan wheel comprises a main supply unit (8) and an additional supply unit (12), which has suction areas that are separated by a partition plate (2). The main supply unit supplies air radially outwards from the suction areas. The additional supply unit comprises fan blades (14). The fan blades of the additional supply unit generate an air flow along an axis of rotation (18) of the fan wheel. The fan blades of the additional supply unit are partly arranged in an opening (11) of the partition plate. An independent claim is included for a home appliance, particularly for a cooking appliance.

Description

Die vorliegende Erfindung betrifft ein Radiallüfterrad gemäß dem Oberbegriff des Patentanspruchs 1 und ein Haushaltsgerät gemäß dem Oberbegriff des Patentanspruchs 9.The present invention relates to a radial fan according to the preamble of patent claim 1 and a domestic appliance according to the preamble of claim 9.

Ein derartiges Radiallüfterrad ist bekannt aus der Druckschrift EP 1 306 623 B1 . Ein Gargerät weist dabei eine Gebläseeinheit auf, die zumindest einen in einem Motorraum angeordneten Motor umfasst. Über diesen ist mit einer durch eine Trennwand geführte Antriebswelle zumindest ein im Garraum angeordneter Lüfter antreibbar. Dabei weist die Gebläseeinheit eine Zusatzfördereinheit zur Erzeugung eines den Motorraum gegen Wrasen abdichtenden Gasdrucks auf.Such a radial fan is known from the document EP 1 306 623 B1 , A cooking appliance in this case has a blower unit which comprises at least one motor arranged in an engine compartment. At least one fan arranged in the cooking space can be driven by means of a drive shaft guided through a dividing wall. In this case, the blower unit has an additional delivery unit for generating a gas pressure sealing the engine compartment against vapor.

Der Erfindung liegt die Aufgabe zugrunde, das Radiallüfterrad aus dem Stand der Technik in seiner Wirkungsweise zu verbessern.The invention has for its object to improve the radial fan from the prior art in its mode of action.

Diese Aufgabe wird durch ein Radiallüfterrad mit den Merkmalen des Patentanspruchs 1, sowie durch ein Haushaltsgerät mit den Merkmalen des Patentanspruchs 9 gelöst.This object is achieved by a radial fan with the features of claim 1, as well as by a household appliance with the features of claim 9.

Gemäß dem kennzeichnenden Teil des Patentanspruchs 1 weist die Zusatzfördereinheit Luftschaufeln auf. Die Luftschaufeln der Zusatzfördereinheit bewirken eine verbesserte Förderleistung, die durch die geometrische Auslegung der Luftschaufeln zudem gut steuerbar ist. Dabei wird bevorzugt das gesamte, von der Zusatzfördereinheit angesaugte Luftvolumen über die Hauptfördereinheit radial nach außen gefördert.According to the characterizing part of patent claim 1, the additional delivery unit on air blades. The air blades of the additional delivery unit cause an improved delivery rate, which is also well controlled by the geometric design of the air blades. In this case, the entire volume of air sucked in by the additional delivery unit is preferably conveyed radially outwards via the main delivery unit.

Bei einer bevorzugten Ausgestaltung erzeugen die Luftschaufeln der Zusatzfördereinheit einen Luftstrom entlang einer Drehachse des Lüfterrades. Die Zusatzfördereinheit ist somit entsprechend einem Axiallüfterrad ausgebildet. Dabei mündet ein Ausblasbereich der Zusatzfördereinheit im Ansaugbereich der Hauptfördereinheit.In a preferred embodiment, the air blades of the additional delivery unit generate an air flow along an axis of rotation of the fan wheel. The additional delivery unit is thus designed according to an axial fan. In this case, a blow-out region of the additional delivery unit opens in the intake region of the main delivery unit.

In einer weiteren Ausgestaltung wird vorgeschlagen, dass die Luftschaufeln der Zusatzfördereinheit zumindest teilweise in einer Öffnung der Trennplatte angeordnet sind. Dies ermöglicht eine besonders flache Ausbildung des Radiallüfterrades insbesondere dann, wenn die Zusatzfördereinheit nicht, oder nur geringfügig über die Trennplatte hinausragt. Über den Querschnitt der Öffnung ist ein Luftdurchsatz der Zusatzfördereinheit steuerbar.In a further embodiment, it is proposed that the air blades of the additional delivery unit are at least partially disposed in an opening of the partition plate. This allows a particularly flat design of the radial fan especially in particular, if the additional feed unit does not project, or only slightly beyond the partition plate. Over the cross section of the opening, an air flow rate of the additional delivery unit is controllable.

Ist die Zusatzfördereinheit von einem ringförmigen Kragen umgeben, so ist dadurch aufgrund der versteifenden Wirkung des Kragens ein stabiles Radiallüfterrad geschaffen, das schwingungsarme Laufeigenschaften aufweist.If the additional conveying unit is surrounded by an annular collar, then a stable radial fan wheel is created due to the stiffening effect of the collar, which has low-vibration running properties.

Vorzugsweise ist der Kragen auf der Trennplatte angeordnet. Dies ermöglicht eine kompakte Bauweise und begünstigt zudem die Ausbildung des Radiallüfterrades als Kunststoffspritzgußteil.Preferably, the collar is arranged on the partition plate. This allows a compact design and also favors the formation of the radial fan as a plastic injection molded part.

Bevorzugt ist es, wenn die Zusatzfördereinheit innerhalb einer vom Kragen eingegrenzten Öffnung angeordnet ist. Dadurch wird ein definierter, klar abgegrenzter Strömungskanal der Zusatzfördereinheit geschaffen. Dieser Strömungskanal ist mit hinreichender Dichtigkeit einfach an angrenzende Strömungskanäle ankoppelbar.It is preferred if the additional delivery unit is arranged within an opening bounded by the collar. This creates a defined, clearly delimited flow channel of the additional delivery unit. This flow channel can be easily coupled to adjacent flow channels with sufficient tightness.

In einer vorteilhaften Ausgestaltung der Erfindung weist der Kragen eine Höhe von 2 bis 10 mm, bevorzugt von 3 bis 8 mm auf. Dadurch ist eine kompakte Bauweise des Radiallüfterrades ermöglicht und zudem im Falle eines Eintauchens des Kragens in einen angrenzenden Luftkanal eine ausreichende Überdeckung gewährleistet. Diese Überdeckung bzw. Überlappung bewirkt eine Abdichtung und verhindert weitestgehend das Ansaugen von Fehlluft.In an advantageous embodiment of the invention, the collar has a height of 2 to 10 mm, preferably from 3 to 8 mm. This allows a compact design of the radial fan and also ensures sufficient coverage in the event of immersion of the collar in an adjacent air duct. This overlap or overlap causes a seal and largely prevents the intake of false air.

Indem die Luftschaufeln der Zusatzfördereinheit eine mechanische Verbindung zwischen einer entlang der Mittelachse angeordneten Antriebsachsenaufnahme und der Trennplatte bilden, ist eine Materialeinsparung bei der Herstellung des Radiallüfterrades ermöglicht. Bevorzugt bilden die Luftschaufeln die alleinige mechanische Verbindung zwischen der Antriebsachsenaufnahme und der Trennplatte. In einer vorteilhaften Weiterbildung sind die Luftschaufeln dabei in zwei übereinanderliegenden Ebenen angeordnet, wodurch der Luftdurchsatz nochmals gesteigert wird. Zudem ist dadurch eine stabilere Anbindung der Antriebsachsenaufnahme an die Trennplatte ermöglicht.By the air blades of the auxiliary conveyor unit form a mechanical connection between a arranged along the central axis drive axle receiving and the partition plate, a material saving in the production of the radial fan is enabled. Preferably, the air blades form the sole mechanical connection between the drive axle receiving and the separating plate. In an advantageous development, the air blades are arranged in two superimposed planes, whereby the air flow is increased again. In addition, this allows a more stable connection of the drive axle receptacle to the partition plate.

Des Weiteren betrifft die Erfindung ein Haushaltsgerät mit einem erfindungsgemäßen Radiallüfterrad, wobei dessen Kragen in einen Ansaugkanal eintaucht. Durch eine derartige Ankopplung zwischen Radiallüfterrad und dem Ansaugkanal des Haushaltsgerätes kann eine besonders dichte Schnittstelle erreicht werden. Die Trennplatte des Radiallüfterrades weist herstellungsbedingt einen gewissen Verzug, bzw. eine bestimmte Ebenheitstoleranz auf. Dadurch ist es erforderlich, einen gewissen Mindestabstand der Trennplatte gegenüber beispielsweise einer Fläche, die ein Ansaugloch des Haushaltsgerätes umgibt, einzuhalten. Dieser erforderliche Mindestabstand bewirkt jedoch ein Ansaugen von Fehlluft durch einen Spalt, der sich zwischen der das Ansaugloch umgebenden Fläche und der Trennplatte ergibt. Durch die Ausbildung eines Kragens, der in das Ansaugloch, bzw. in den Ansaugkanal eintaucht, wird ein derartiges Ansaugen von Fehlluft verhindert.Furthermore, the invention relates to a household appliance with a radial fan according to the invention, wherein the collar dips into an intake duct. By such Coupling between radial fan and the intake of the household appliance, a particularly dense interface can be achieved. The partition plate of the radial fan has production due to a certain delay, or a certain flatness tolerance. This makes it necessary to maintain a certain minimum distance of the partition plate from, for example, a surface surrounding a suction hole of the household appliance. However, this required minimum distance causes a false air suction through a gap, which results between the surface surrounding the suction hole and the partition plate. By forming a collar which dips into the suction hole, or in the intake passage, such suction of false air is prevented.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels unter Bezugnahme auf die beigefügten Figuren.Further features and advantages of the invention will become apparent from the following description of an embodiment with reference to the accompanying figures.

Es zeigen:

Figur 1
das erfindungsgemäße Radiallüfterrad in einer räumlichen Darstellung von oben;
Figur 2
das Radiallüfterrad in einer räumlichen Darstellung von unten und
Figur 3
eine Prinzipdarstellung des in ein Gargerät eingebauten Radiallüfterrades.
Show it:
FIG. 1
the radial fan according to the invention in a spatial representation from above;
FIG. 2
the radial fan in a spatial representation of the bottom and
FIG. 3
a schematic diagram of the built-in cooking appliance radial fan.

Das Radiallüfterrad in Figur 1 weist eine Trennplatte 2 auf, in dessen Zentrum eine Antriebsachsenaufnahme 4 angeordnet ist. Diese ist hülsenförmig ausgebildet und dient zur Aufnahme einer Motorachse eines Lüftermotors (nicht gezeigt). Zur Aufnahme der Motorachse weist die Antriebsachsenaufnahme 4 eine Aufnahmeöffnung 5 auf, in die die Motorachse (nicht gezeigt) gesteckt ist. Die Antriebsachsenaufnahme 4 ist über vier Haltestege 6 mit der Trennplatte 2 verbunden. Auf der Trennplatte 2 ist eine Hauptfördereinheit 8 in Form von Luftschaufeln 10 angeordnet. Die Luftschaufeln 10 der Hauptfördereinheit 8 erstrecken sich dabei von einem Außenumfang der Trennplatte 2 radial nach innen in Richtung der Antriebsachsenaufnahme 4. Die Luftschaufeln 10 der Hauptfördereinheit 8 sind dabei bogenförmig ausgebildet und weisen eine Höhe H auf. Die Luftschaufeln 10 enden vor einer kreisförmigen Öffnung 11, die in der Mitte der Trennplatte 2 angeordnet ist und in dessen Zentrum die Antriebsachsenaufnahme 4 bildet. Die Öffnung 11 weist eine Zusatzfördereinheit 12 auf, die durch vier Luftschaufeln 14 gebildet wird. Die Luftschaufeln 14 sind dabei derart ausgestaltet, dass sie einen Luftstrom in Richtung einer Achse 18 bewirken. Die Achse 18 bildet dabei die Rotationsachse der Antriebsachsenaufnahme, bzw. des gesamten Radiallüfterrades.The radial fan in FIG. 1 has a partition plate 2, in the center of a drive axle receiving 4 is arranged. This is sleeve-shaped and serves to receive a motor axis of a fan motor (not shown). For receiving the motor shaft, the drive axle receiving 4 has a receiving opening 5, in which the motor shaft (not shown) is inserted. The drive axle receiving 4 is connected via four retaining webs 6 with the partition plate 2. On the partition plate 2, a main conveyor unit 8 is arranged in the form of air blades 10. The air blades 10 of the main conveyor unit 8 extend from an outer periphery of the partition plate 2 radially inwardly in the direction of the drive axle receiving 4. The air blades 10 of the main conveyor unit 8 are arcuately formed and have a height H. The air blades 10 terminate in front of a circular opening 11, which is arranged in the middle of the partition plate 2 is and in the center of the drive axle receiving 4 forms. The opening 11 has an additional delivery unit 12, which is formed by four air blades 14. The air blades 14 are designed such that they cause an air flow in the direction of an axis 18. The axis 18 forms the axis of rotation of the drive axle, or the entire radial fan.

Figur 2 zeigt einen an einer Unterseite des Radiallüfterrades ausgebildeten Kragen 16, dessen Innendurchmesser dem Durchmesser der Öffnung 11 entspricht. Die Luftschaufeln 14 der Zusatzfördereinheit 12 sind dabei innerhalb des Kragens 16 angeordnet. Zudem sind sie jeweils mittig entlang einer Winkelhalbierenden in von den Haltestegen 6 gebildeten Zwischenräumen 17 angeordnet. Entsprechend den Anforderungen an die Stabilität ist es in einer alternativen Ausgestaltung (nicht gezeigt) auch möglich, die Haltestege 6 ebenfalls in Form von Luftschaufeln 14 auszubilden. Damit setzt sich die Zusatzfördereinheit 12 aus zwei Reihen von Luftschaufeln 14 zusammen, die bezüglich der Achse 18 in Achsrichtung beabstandet voneinander angeordnet sind. Bei einer Blickrichtung in Richtung der Achse 18 sind die beiden Reihen an Luftschaufeln 14 dabei derart zueinander versetzt angeordnet, dass die sich ergebenden Lücken zwischen den Luftschaufeln 14 gleich groß sind. Die Luftschaufeln 14 der Zusatzfördereinheit 12 sind dabei in beiden Ausgestaltungen derart in Richtung der Achse 18 geneigt, dass sie einen Luftstrom entlang der Achse 18 bewirken. FIG. 2 shows a formed on a bottom of the radial fan collar 16, whose inner diameter corresponds to the diameter of the opening 11. The air blades 14 of the additional conveying unit 12 are arranged within the collar 16. In addition, they are each arranged centrally along an angle bisector in spaces 17 formed by the retaining webs 6. According to the stability requirements, it is also possible in an alternative embodiment (not shown) to form the retaining webs 6 likewise in the form of air blades 14. Thus, the additional delivery unit 12 is composed of two rows of air blades 14, which are arranged with respect to the axis 18 in the axial direction spaced from each other. In a viewing direction in the direction of the axis 18, the two rows of air blades 14 are arranged offset from one another in such a way that the resulting gaps between the air blades 14 are the same size. The air blades 14 of the auxiliary conveyor unit 12 are inclined in both embodiments in the direction of the axis 18 so that they cause an air flow along the axis 18.

Die Darstellung in Figur 3 zeigt schematisch das in ein Gargerät eingebaute Radiallüfterrad. Das Radiallüfterrad dient dabei zur Erzeugung eines Kühlluftstromes LK, der zur Kühlung eines Schalterraumes des Gargerätes (nicht gezeigt) verwendet wird. Zudem bewirkt das Radiallüfterrad durch seine Zusatzfördereinheit 12 eine Abfuhr eines Wrasens aus einer, mit einer Isolierung 23 umgebenen Backofenmuffel 19 des Gargerätes. Der abgeführte Wrasen wird dabei mit dem Kühlluftstrom LK vermischt. Über einen oben angeordneten Ansaugbereich AH der Hauptfördereinheit 8 bildet sich im Betrieb der Kühlluftstrom LK aus, der über die Hauptfördereinheit 8 radial nach außen in einen Ausblasbereich A gefördert wird. Der kreisförmige ausgebildete Ansaugbereich AH der Hauptfördereinheit 8 ist dabei mittig oberhalb der Hauptfördereinheit 8 angeordnet. Die Achse 18 bildet dabei das Zentrum des Ansaugbereiches AH. Über einen Ansaugkanal 21 wird gegenüberliegend zum Ansaugbereich AH der Hauptfördereinheit 8 zusätzlich über einen Ansaugbereich AZ der Zusatzfördereinheit 12 ein Wrasenluftstrom LW angesaugt. Durch die Öffnung 11 wird der Wrasenluftstrom LW mittels der Luftschaufeln 14 der Zusatzfördereinheit 12 zur oberhalb der Trennplatte 2 angeordneten Hauptfördereinheit 8 gefördert. Der Wrasenluftstrom LW aus dem Ansaugbereich AZ der Zusatzfördereinheit 12 und der Kühlluftstrom LK ergeben dabei einen Mischluftstrom LM, der über den Ausblasbereich A in einen Ausblaskanal 22 gefördert wird. Ein Spalt S zwischen der Trennplatte 2 und einem auf der Isolierung 23 angeordneten Abdeckblech 20 kann dabei großzügig gewählt werden, da der Kragen 16 derart ausgebildet ist, dass er in den Ansaugkanal 21 eintaucht und dadurch das Ansaugen einer Fehlluft über den Spalt S weitgehend verhindert.The representation in FIG. 3 schematically shows the built-in cooking appliance radial fan. The radial fan serves to generate a cooling air flow LK, which is used for cooling a switch room of the cooking appliance (not shown). In addition, the radial fan causes through its additional delivery unit 12 a removal of a Wrasens from a, surrounded by an insulation 23 oven muffle 19 of the cooking appliance. The discharged vapor is mixed with the cooling air flow LK. During operation, the cooling air flow LK, which is conveyed radially outward into a blow-out region A via the main conveying unit 8, is formed by means of an intake region AH of the main delivery unit 8 arranged at the top. The circular suction area AH of the main conveyor unit 8 is arranged centrally above the main conveyor unit 8. The axis 18 forms the center of the intake AH. Via an intake passage 21, opposite to the intake area AH of the main delivery unit 8, a compressed air flow LW is additionally drawn in via an intake area AZ of the additional delivery unit 12. Through the opening 11, the compressed air flow LW is conveyed by means of the air blades 14 of the additional delivery unit 12 to the main delivery unit 8 arranged above the separating plate 2. The Wrasenluftstrom LW from the intake AZ of the additional delivery unit 12 and the cooling air flow LK result in a mixed air flow LM, which is conveyed via the blow-out A in a blow-out 22. A gap S between the partition plate 2 and a cover plate 20 arranged on the insulation 23 can be chosen generously, since the collar 16 is designed such that it dips into the intake passage 21 and thereby largely prevents the intake of a faulty air via the gap S.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

22
Trennplatteseparating plate
44
AntriebsachsenaufnahmeDrive axles recording
55
Aufnahmeöffnungreceiving opening
66
Haltestegeretaining webs
88th
HauptfördereinheitMain delivery unit
1010
Luftschaufeln der HauptfördereinheitAir blades of the main conveyor unit
1111
Öffnungopening
1212
ZusatzfördereinheitAdditional delivery unit
1414
Luftschaufeln der ZusatzfördereinheitAir blades of the auxiliary conveyor unit
1616
Kragencollar
1717
Zwischenraumgap
1818
Achseaxis
1919
Muffelmuffle
2020
AbdeckblechCover plate
2121
Ansaugkanalintake port
2222
Ausblaskanalblow-out
2323
Isolierunginsulation
AA
Ausblasbereichblow out
AHAH
Ansaugbereich HauptfördereinheitIntake area main conveyor unit
AZAZ
Ansaugbereich ZusatzfördereinheitIntake area additional feed unit
HH
Höheheight
LMLM
MischluftstromMixed air stream
LKLK
KühlluftstromCooling air flow
LWLW
WrasenluftstromWrasenluftstrom
SS
Spaltgap

Claims (10)

Radiallüfterrad für ein Haushaltsgerät, insbesondere für ein Gargerät, mit einer Hauptfördereinheit (8) und einer Zusatzfördereinheit (12), die durch eine Trennplatte (2) jeweils räumlich voneinander getrennte Ansaugbereiche (AH, AZ) aufweisen, und bei dem die Hauptfördereinheit (8) dazu vorgesehen ist, die aus den Ansaugbereichen (AH, AZ) angesaugte Luft radial nach außen zu fördern, dadurch gekennzeichnet, dass die Zusatzfördereinheit (12) Luftschaufeln (14) aufweist.Radial fan for a household appliance, in particular for a cooking appliance, with a main conveyor unit (8) and an additional conveyor unit (12), each spatially separated by a partition plate (2) suction areas (AH, AZ), and wherein the main conveyor unit (8) is provided to promote the sucked from the suction (AH, AZ) air radially outward, characterized in that the additional delivery unit (12) air blades (14). Radiallüfterrad nach Anspruch 1, dadurch gekennzeichnet, dass die Luftschaufeln (14) der Zusatzfördereinheit (12) einen Luftstrom (LW) entlang einer Drehachse (18) des Lüfterrades erzeugen.Radial fan according to claim 1, characterized in that the air blades (14) of the additional conveying unit (12) generate an air flow (LW) along an axis of rotation (18) of the fan wheel. Radiallüfterrad nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Luftschaufeln (14) der Zusatzfördereinheit (12) zumindest teilweise in einer Öffnung (11) der Trennplatte (2) angeordnet sind.Radial fan according to claim 1 or 2, characterized in that the air blades (14) of the additional conveying unit (12) at least partially in an opening (11) of the partition plate (2) are arranged. Radiallüfterrad nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Zusatzfördereinheit (12) von einem ringförmigen Kragen (16) umgeben ist.Radial fan according to one of the preceding claims, characterized in that the additional conveying unit (12) by an annular collar (16) is surrounded. Radiallüfterrad nach Anspruch 4, dadurch gekennzeichnet, dass der Kragen (16) auf der Trennplatte (2) angeordnet ist.Radial fan according to claim 4, characterized in that the collar (16) is arranged on the partition plate (2). Radiallüfterrad nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass die Zusatzfördereinheit (12) innerhalb einer vom Kragen (16) eingegrenzten Öffnung (11) angeordnet ist.Radial fan according to claim 4 or 5, characterized in that the additional conveying unit (12) within a collar (16) bounded opening (11) is arranged. Radiallüfterrad nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass der Kragen (16) eine Höhe von 2 bis 10 mm, bevorzugt von 3 bis 8 mm aufweist.Radial fan according to one of claims 4 to 6, characterized in that the collar (16) has a height of 2 to 10 mm, preferably from 3 to 8 mm. Radiallüfterrad nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Luftschaufeln (14) der Zusatzfördereinheit (12) eine mechanische Verbindung zwischen einer entlang einer Mittelachse (18) angeordneten Antriebsachsenaufnahme (4) und der Trennplatte (2) bilden.Radial fan according to one of the preceding claims, characterized in that the air blades (14) of the additional conveyor unit (12) form a mechanical connection between a along a central axis (18) arranged drive axle receptacle (4) and the partition plate (2). Haushaltsgerät, insbesondere Gargerät mit einem Radiallüfterrad nach einem der vorhergehenden Ansprüche.Domestic appliance, in particular cooking appliance with a radial fan according to one of the preceding claims. Haushaltsgerät, insbesondere Gargerät nach Anspruch 9, mit einem Radiallüfterrad nach Anspruch 4, dadurch gekennzeichnet, dass der Kragen (16) in einem Ansaugkanal (21) eintaucht.Domestic appliance, in particular cooking appliance according to claim 9, with a radial fan according to claim 4, characterized in that the collar (16) in a suction channel (21) is immersed.
EP12166751.3A 2011-05-11 2012-05-04 Radial fan for suction hood Active EP2522858B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011075628A DE102011075628A1 (en) 2011-05-11 2011-05-11 Radial fan and home appliance with a radial fan

Publications (3)

Publication Number Publication Date
EP2522858A2 true EP2522858A2 (en) 2012-11-14
EP2522858A3 EP2522858A3 (en) 2017-07-19
EP2522858B1 EP2522858B1 (en) 2020-10-21

Family

ID=46177230

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12166751.3A Active EP2522858B1 (en) 2011-05-11 2012-05-04 Radial fan for suction hood

Country Status (2)

Country Link
EP (1) EP2522858B1 (en)
DE (1) DE102011075628A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1306623B1 (en) 2001-10-25 2008-09-03 BSH Bosch und Siemens Hausgeräte GmbH Cooking device with ventilation unit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1805121A1 (en) * 1968-10-25 1970-05-21 Siemens Ag Two-stage fan
JPS5136111U (en) * 1974-09-11 1976-03-17
US8821227B2 (en) * 2009-10-07 2014-09-02 Sunonwealth Electric Machine Industry Co., Ltd. Heat dissipating system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1306623B1 (en) 2001-10-25 2008-09-03 BSH Bosch und Siemens Hausgeräte GmbH Cooking device with ventilation unit

Also Published As

Publication number Publication date
EP2522858A3 (en) 2017-07-19
DE102011075628A1 (en) 2012-11-15
EP2522858B1 (en) 2020-10-21

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