EP1990465B1 - Tumble dryer with an air canal - Google Patents

Tumble dryer with an air canal Download PDF

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Publication number
EP1990465B1
EP1990465B1 EP08007190A EP08007190A EP1990465B1 EP 1990465 B1 EP1990465 B1 EP 1990465B1 EP 08007190 A EP08007190 A EP 08007190A EP 08007190 A EP08007190 A EP 08007190A EP 1990465 B1 EP1990465 B1 EP 1990465B1
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EP
European Patent Office
Prior art keywords
air duct
tumble dryer
displacement member
flow
air
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.)
Not-in-force
Application number
EP08007190A
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German (de)
French (fr)
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EP1990465A1 (en
Inventor
Thomas Gossel
Christian Maiss
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.)
Miele und Cie KG
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Miele und Cie KG
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 Miele und Cie KG filed Critical Miele und Cie KG
Priority to SI200830755T priority Critical patent/SI1990465T1/en
Priority to PL08007190T priority patent/PL1990465T3/en
Publication of EP1990465A1 publication Critical patent/EP1990465A1/en
Application granted granted Critical
Publication of EP1990465B1 publication Critical patent/EP1990465B1/en
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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • D06F58/04—Details 
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/51—Inlet

Definitions

  • the invention relates to a tumble dryer with an air duct for guiding an air flow in the direction of a blower, wherein the air duct is formed with at least one curved portion formed in sections flow space in which the air flow undergoes a deflection in the direction of blower.
  • Such clothes dryers are e.g. known under the type designation Miele T 4462 C.
  • the tumble dryer is equipped in the area of the air ducts and the heat exchanger with sound absorbing agents, which significantly reduce the operating noise of the tumble dryer. In the area of the flow-deflecting channel sections of the air duct, however, further measures for noise reduction are required.
  • EP 1 865 103 A1 discloses a clothes dryer, in which a nose-shaped body for absorbing noise is arranged in the flow space in front of the fan.
  • the nose-shaped body is formed with its surface so that noise waves can be absorbed, which are located in the flow space and generated by the blower.
  • the nose-shaped body is in this case designed such that no influence on the air flow takes place. Overall, this arrangement is quite complex due to the noise-absorbing surface.
  • the invention thus raises the problem of implementing noise-reducing measures in a tumble dryer in the region of flow-deflecting channel sections with the least possible installation effort.
  • the advantages achievable with the invention consist in particular in that the velocity field of the air flow in the region of the deflection or in the curved flow space in front of the fan is made uniform by arranging a displacement body. By adjusting spiral-free flow of the impeller whirling are reduced resulting in a uniform flow distribution over the entire inflow. This uniform flow distribution causes a significant reduction in noise while increasing the volume flow.
  • the displacement body may also be expedient, according to a further advantageous embodiment of the invention, to arrange the displacement body on an axis running parallel to the blower axis.
  • the displacement body rotationally symmetrical.
  • the displacement body is spherical.
  • the displacement body is formed with a cylindrical and / or a conical portion.
  • the displacement body is particularly advantageous to shape the displacement body out of the wall section of the flow space or to form it as an integral part of the wall section of the flow space. According to a further embodiment, it is also possible to arrange the displacement body as a separate component in the flow space.
  • FIG. 1 a clothes dryer 1 with a rotatably mounted drum 2 is shown.
  • the feed opening 3 to the drum 2 is closed by a door, not shown here.
  • the feed opening 3 is encompassed by a functional component 4, which also contains the front air guide from the drum 2 in the direction of the blower 5.
  • the functional component 4 is formed in the region below the feed opening 3 as an air channel 6 (partially cut) for the air flow emerging from the drum 2.
  • the flow space 7 is visible in front of the blower 5 with the displacement body 8 arranged therein.
  • the flow space in which the air flow experiences a deflection in the direction of the blower 5 is curved in partial sections.
  • FIG. 2 the air duct 6 with the flow space 7 in front of the fan 5 with the displacement body 8 arranged therein is shown in section.
  • FIG. 3 The essential details of the invention are in FIG. 3 shown enlarged.
  • the displacement body 8 is positioned in the embodiment shown here on the impeller axis 9 and rotationally symmetrical.
  • the displacement body 8 has in the direction of the inflow surface 10 of the blower 5 a spherical portion 8 '.
  • the displacement body 8 is formed out of the wall portion 11 of the air channel 6 and the flow space 7 and integrally connected thereto. Depending on the geometry of the air duct 6, the displacement body 8 is formed in the region of the transition to the wall section 11 of the air duct 6 with an approximately cylindrical section 8 ", to which the spherical section 8 'connects.
  • the displacement body is formed with a conical portion.
  • the displacement body is formed as a separate component and fixed by means of a suitable connection technique (gluing, welding, notches, etc.) in the air duct.
  • the diameter d of the rotationally symmetrical section 8 "of the displacement body 8 is equal to or approximately equal to the nozzle diameter of the blower 5 denoted by c.
  • the coordination of the distance dimensions a and b to the geometry of the flow space 7 and to the nozzle diameter c of the blower 5 and the diameter d of the displacement body 8 causes a constant flow cross-section
  • the velocity field of the air flow can be adjusted via the parameters a and b.
  • the displacement body can also be positioned on an axis arranged at an inclination angle to the axis of the impeller axis.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

Die Erfindung betrifft einen Wäschetrockner mit einem Luftkanal zur Führung eines Luftstromes in Richtung eines Gebläses, wobei der Luftkanal mit mindestens einem in Teilabschnitten gekrümmt ausgebildeten Strömungsraum ausgebildet ist, in dem der Luftstrom eine Umlenkung in Richtung Gebläse erfährt.The invention relates to a tumble dryer with an air duct for guiding an air flow in the direction of a blower, wherein the air duct is formed with at least one curved portion formed in sections flow space in which the air flow undergoes a deflection in the direction of blower.

Derartige Wäschetrockner sind z.B. unter der Typenbezeichnung Miele T 4462 C bekannt. Der Wäschetrockner ist im Bereich der Luftführungskanäle und des Wärmetauschers mit geräuschdämmenden Mitteln ausgerüstet, welche die Betriebsgeräusche des Wäschetrockners deutlich reduzieren. Im Bereich der strömungsumlenkenden Kanalabschnitte der Luftführung sind jedoch weitere Maßnahmen zur Geräuschminderung erforderlich.Such clothes dryers are e.g. known under the type designation Miele T 4462 C. The tumble dryer is equipped in the area of the air ducts and the heat exchanger with sound absorbing agents, which significantly reduce the operating noise of the tumble dryer. In the area of the flow-deflecting channel sections of the air duct, however, further measures for noise reduction are required.

Aus der EP 0 702 105 B1 ist es z. B. bekannt, das Gebläsegehäuse auf der Lufteintrittsseite mit einem das Gebläserad abdeckenden Lufteingang und einem trichterförmigen Ansatz auszubilden, in den Maßnahmen zur Geräuschdämmung integriert werden können. Dadurch wird eine Anpassung an unterschiedliche Formen der Luftführung ermöglicht. Die Optimierung des gesamten Gebläses hinsichtlich Gebläseleistung und Schallabstrahlung erfordert hier jedoch einen hohen Montageaufwand.From the EP 0 702 105 B1 is it z. B. known to form the fan housing on the air inlet side with a blower wheel covering the air inlet and a funnel-shaped approach, can be integrated into the noise reduction measures. This allows adaptation to different forms of air flow. The optimization of the entire blower in terms of fan performance and sound radiation, however, requires a high installation cost here.

Aus der DE 89 04 738 U1 ist es bekannt, vor der Ansaugöffnung eines Gebläses einen Deflektor mit Leitschaufeln anzuordnen, der den angesaugten Luftstrom in eine Helikoidalrotation bringt. Hierbei kann es aufgrund von Luftverwirbelungen zu Geräuschen am Deflektor selbst kommen, so dass eine Geräuschreduzierung nur in einem begrenzten Bereich der Strömungsintensität erreicht werden kann.From the DE 89 04 738 U1 It is known to arrange a deflector with vanes in front of the intake opening of a blower, which brings the sucked air flow in a helicoidal rotation. In this case, due to air turbulence, noise may occur at the deflector itself, so that noise reduction can only be achieved in a limited range of the flow intensity.

Aus der DE 196 44 711 A1 ist es bekannt, in einem gekrümmten Gaskanal Strömungsleitkörper anzuordnen, um den Luftstrom auf die einzelnen Prozessluftkanäle im Wärmetauscher zu verteilen bzw. aufzufächern.From the DE 196 44 711 A1 It is known to arrange in a curved gas duct flow guide to distribute the air flow to the individual process air ducts in the heat exchanger or fan out.

In der nachveröffentlichten EP 1 865 103 A1 ist ein Wäschetrockner offenbart, bei dem im Strömungsraum vor dem Gebläse ein nasenförmiger Körper zum Absorbieren von Geräuschen angeordnet ist. Der nasenförmige Körper ist mit seiner Oberfläche derart ausgebildet, dass Geräuschwellen absorbiert werden können, die sich im Strömungsraum befinden und vom Gebläse erzeugt wurden. Der nasenförmige Körper ist hierbei derart gestaltet, dass keine Beeinflussung der Luftströmung stattfindet. Insgesamt ist diese Anordnung aufgrund der geräuschabsorbierenden Oberfläche recht aufwändig.In the post-published EP 1 865 103 A1 discloses a clothes dryer, in which a nose-shaped body for absorbing noise is arranged in the flow space in front of the fan. The nose-shaped body is formed with its surface so that noise waves can be absorbed, which are located in the flow space and generated by the blower. The nose-shaped body is in this case designed such that no influence on the air flow takes place. Overall, this arrangement is quite complex due to the noise-absorbing surface.

In der DE 198 39 729 A1 ist ein Luftverteilerkasten mit Gebläse für ein Kraftfahrzeug offenbart, bei der an der Ansaugöffnung ein Körper vorgesehen ist, der tiefe Brummgeräusche verhindern soll. Hierbei werden turbulente Luftströmungen um die Ansaugöffnung vermindert bzw verhindert, so dass kein unerwünschter Druckausgleich zwischen Ansaugseite und Druckseite des Gebläses mehr erfolgt.In the DE 198 39 729 A1 discloses an air distribution box with blower for a motor vehicle, in which at the intake opening a body is provided, which is intended to prevent deep humming noises. In this case, turbulent air flows are reduced or prevented around the intake, so that no unwanted pressure equalization between the suction side and the pressure side of the blower more.

Der Erfindung stellt sich somit das Problem, geräuschmindernde Maßnahmen bei einem Wäschetrockner im Bereich von strömungsumlenkenden Kanalabschnitten mit möglichst geringem Montageaufwand zu realisieren.The invention thus raises the problem of implementing noise-reducing measures in a tumble dryer in the region of flow-deflecting channel sections with the least possible installation effort.

Erfindungsgemäß wird dieses Problem durch einen Wäschetrockner 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 a tumble dryer with the features of 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 das Geschwindigkeitsfeld der Luftströmung im Bereich der Umlenkung bzw. in dem gekrümmt ausgebildeten Strömungsraum vor dem Gebläse durch Anordnung eines Verdrängungskörpers vergleichmäßigt wird. Durch die sich einstellende drallfreie Anströmung des Gebläserades werden Wirbelbildungen reduziert was zu einer gleichmäßigen Strömungsverteilung über die gesamte Anströmfläche führt. Diese gleichmäßige Strömungsverteilung bewirkt eine deutliche Geräuschreduzierung bei gleichzeitig erhöhtem Volumenstrom.The advantages achievable with the invention consist in particular in that the velocity field of the air flow in the region of the deflection or in the curved flow space in front of the fan is made uniform by arranging a displacement body. By adjusting spiral-free flow of the impeller whirling are reduced resulting in a uniform flow distribution over the entire inflow. This uniform flow distribution causes a significant reduction in noise while increasing the volume flow.

Dabei ist es zweckmäßig, den Verdrängungskörper auf der Gebläseachse anzuordnen.It is expedient to arrange the displacement body on the blower axis.

Je nach Ausbildung des Strömungsraumes vor dem Gebläse kann es jedoch auch gemäß einer weiteren vorteilhaften Ausführungsform der Erfindung zweckmäßig sein, den Verdrängungskörper auf einer zur Gebläseradachse parallel verlaufenden Achse anzuordnen.Depending on the design of the flow space in front of the blower, however, it may also be expedient, according to a further advantageous embodiment of the invention, to arrange the displacement body on an axis running parallel to the blower axis.

Es ist zweckmäßig, den Verdrängungskörper rotationssymmetrisch auszubilden. In einer vorteilhaften Ausführung der Erfindung ist der Verdrängungskörper kugelförmig ausgebildet.It is expedient to form the displacement body rotationally symmetrical. In an advantageous embodiment of the invention, the displacement body is spherical.

In einer weiteren vorteilhaften Ausführung der Erfindung ist der Verdrängungskörper mit einem zylindrischen und/oder einem kegelförmigen Abschnitt ausgebildet.In a further advantageous embodiment of the invention, the displacement body is formed with a cylindrical and / or a conical portion.

Besonders vorteilhaft ist es, den Verdrängungskörper aus dem Wandabschnitt des Strömungsraumes heraus zu formen bzw. als integralen Bestandteil des Wandabschnitts des Strömungsraumes auszubilden. Gemäß einer weiteren Ausführungsform ist es auch möglich, den Verdrängungskörper als separates Bauteil im Strömungsraum anzuordnen.It is particularly advantageous to shape the displacement body out of the wall section of the flow space or to form it as an integral part of the wall section of the flow space. According to a further embodiment, it is also possible to arrange the displacement body as a separate component in the flow space.

Besonders vorteilhaft ist es in jedem Fall, die Form und Anordnung des Verdrängungskörpers abhängig von der Geometrie des Luftkanals und des Strömungsraumes vor dem Gebläse sowie abhängig vom Volumenstrom anhand von Versuchsreihen zu optimieren.In any case, it is particularly advantageous to optimize the shape and arrangement of the displacement body depending on the geometry of the air duct and the flow space in front of the blower and depending on the volume flow based on test series.

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

Figur 1
den Wäschetrockner mit den erfindungswesentlichen Bauteilen in perspektivischer Darstellung,
Figur 2
den Wäschetrockner mit den erfindungswesentlichen Bauteilen in der Seitenansicht im Schnitt und
Figur 3
den Strömungsraum vor dem Gebläse mit dem Verdrängungskörper als Einzelheit vergrößert in der Seitenansicht im Schnitt dargestellt.
An embodiment of the invention is shown purely schematically in the drawings and will be described in more detail below. Show it:
FIG. 1
the tumble dryer with the components essential to the invention in a perspective view,
FIG. 2
the dryer with the invention essential components in the side view in section and
FIG. 3
the flow space in front of the blower with the displacement body as a detail enlarged in the side view in section.

In der Figur 1 ist ein Wäschetrockner 1 mit einer drehbar gelagerten Trommel 2 gezeigt. Die Beschickungsöffnung 3 zur Trommel 2 wird von einer hier nicht dargestellten Tür verschlossen. Die Beschickungsöffnung 3 wird von einem Funktionsbauteil 4 umfasst, dass auch die vordere Luftführung von der Trommel 2 in Richtung Gebläse 5 enthält. Das Funktionsbauteil 4 ist im Bereich unterhalb der Beschickungsöffnung 3 als Luftkanal 6 (teilweise geschnitten dargestellt) für den aus der Trommel 2 austretenden Luftstrom ausgebildet. Im Teilschnitt durch den Luftkanal 6 ist der Strömungsraum 7 vor dem Gebläse 5 mit dem darin angeordneten Verdrängungskörper 8 sichtbar. Der Strömungsraum, in dem der Luftstrom eine Umlenkung in Richtung Gebläse 5 erfährt, ist in Teilabschnitten gekrümmt ausgebildet.In the FIG. 1 a clothes dryer 1 with a rotatably mounted drum 2 is shown. The feed opening 3 to the drum 2 is closed by a door, not shown here. The feed opening 3 is encompassed by a functional component 4, which also contains the front air guide from the drum 2 in the direction of the blower 5. The functional component 4 is formed in the region below the feed opening 3 as an air channel 6 (partially cut) for the air flow emerging from the drum 2. In a partial section through the air duct 6, the flow space 7 is visible in front of the blower 5 with the displacement body 8 arranged therein. The flow space in which the air flow experiences a deflection in the direction of the blower 5 is curved in partial sections.

In der Figur 2 ist der Luftkanal 6 mit dem Strömungsraum 7 vor dem Gebläse 5 mit dem darin angeordneten Verdrängungskörper 8 im Schnitt gezeigt.In the FIG. 2 the air duct 6 with the flow space 7 in front of the fan 5 with the displacement body 8 arranged therein is shown in section.

Die erfindungswesentlichen Einzelheiten sind in Figur 3 vergrößert dargestellt. Der Verdrängungskörper 8 ist bei dem hier dargestellten Ausführungsbeispiel auf der Gebläseradachse 9 positioniert und rotationssymmetrisch ausgebildet. Der Verdrängungskörper 8 weist in Richtung der Anströmfläche 10 des Gebläses 5 einen kugelförmigen Abschnitt 8' auf.The essential details of the invention are in FIG. 3 shown enlarged. The displacement body 8 is positioned in the embodiment shown here on the impeller axis 9 and rotationally symmetrical. The displacement body 8 has in the direction of the inflow surface 10 of the blower 5 a spherical portion 8 '.

Der Verdrängungskörper 8 ist aus dem Wandabschnitt 11 des Luftkanals 6 bzw. des Strömungsraumes 7 heraus geformt und mit diesem einstückig verbunden. Dadurch ist der Verdrängungskörper 8 bei diesem Ausführungsbeispiel integraler Bestandteil des Luftkanals 6. Je nach Geometrie des Luftkanals 6 ist der Verdrängungskörper 8 im Bereich des Überganges zum Wandabschnitt 11 des Luftkanals 6 mit einem annähernd zylindrischen Abschnitt 8" ausgebildet, an den sich der kugelförmige Abschnitt 8' anschließt.The displacement body 8 is formed out of the wall portion 11 of the air channel 6 and the flow space 7 and integrally connected thereto. Depending on the geometry of the air duct 6, the displacement body 8 is formed in the region of the transition to the wall section 11 of the air duct 6 with an approximately cylindrical section 8 ", to which the spherical section 8 'connects.

In einem nicht gezeigten Ausführungsbeispiel der Erfindung ist der Verdrängungskörper mit einem kegelförmigen Abschnitt ausgebildet.In an embodiment of the invention, not shown, the displacement body is formed with a conical portion.

Gemäß einem weiteren nicht gezeichneten Ausführungsbeispiel der Erfindung ist der Verdrängungskörper als separates Bauteil ausgebildet und mittels einer geeigneten Verbindungstechnik (Kleben, Schweißen, Rasten etc.) im Luftkanal fixiert.According to a further not shown embodiment of the invention, the displacement body is formed as a separate component and fixed by means of a suitable connection technique (gluing, welding, notches, etc.) in the air duct.

In einer bevorzugten optimierten Ausführung der Erfindung ist der Durchmesser d des rotationssymmetrischen Abschnitts 8" des Verdrängungskörpers 8 gleich oder annähernd gleich dem mit c bezeichneten Düsendurchmesser des Gebläses 5. Die Abstimmung der Abstandsmaße a und b an die Geometrie des Strömungsraumes 7 sowie an den Düsendurchmesser c des Gebläses 5 und den Durchmesser d des Verdrängungskörpers 8 bewirkt einen konstanten Strömungsquerschnitt. Das Geschwindigkeitsfeld der Luftströmung kann über die Parameter a und b angepasst werden.In a preferred optimized embodiment of the invention, the diameter d of the rotationally symmetrical section 8 "of the displacement body 8 is equal to or approximately equal to the nozzle diameter of the blower 5 denoted by c. The coordination of the distance dimensions a and b to the geometry of the flow space 7 and to the nozzle diameter c of the blower 5 and the diameter d of the displacement body 8 causes a constant flow cross-section The velocity field of the air flow can be adjusted via the parameters a and b.

Je nach geometrischer Ausgestaltung des Strömungsraumes kann der Verdrängungskörper auch auf einer unter einem Neigungswinkel zur Gebläseradachse angeordneten Achse positioniert werden.Depending on the geometric configuration of the flow space, the displacement body can also be positioned on an axis arranged at an inclination angle to the axis of the impeller axis.

Claims (10)

  1. Tumble dryer (1) comprising a rotatably mounted drum (2) and an air duct (6) for conveying an air flow leaving the drum (2) towards a fan (5), the air duct (6) being formed having at least one flow chamber (7) which is curved in portions and in which the air flow is deflected towards the fan (5),
    characterised in that
    a displacement member (8) is arranged in the flow chamber (7) in front of the fan (5) to homogenise the velocity field of the air flow in the region of the deflection or in the curved flow chamber (7) to produce an irrotational flow against the fan wheel (5) and reduce the formation of vortices.
  2. Tumble dryer (1) having an air duct (6) according to claim 1,
    characterised in that
    the displacement member (8) is arranged on the fan wheel axis (9).
  3. Tumble dryer (1) having an air duct (6) according to claim 1,
    characterised in that
    the displacement member (8) is arranged axially parallel to the fan wheel axis (9).
  4. Tumble dryer (1) having an air duct (6) according to any of claims 1 to 3, characterised in that
    the displacement member (8) is rotationally symmetrical.
  5. Tumble dryer (1) having an air duct (6) according to claim 4,
    characterised in that
    the displacement member (8) has a cylindrical and/or a spherical portion (8", 8').
  6. Tumble dryer (1) having an air duct (6) according to claim 4,
    characterised in that
    the displacement member (8) has a cylindrical and/or a conical portion.
  7. Tumble dryer (1) having an air duct (6) according to any of claims 1 to 6,
    characterised in that
    the displacement member (8) is an integral component of a wall portion (11) of the flow chamber (7).
  8. Tumble dryer (1) having an air duct (6) according to any of claims 1 to 6,
    characterised in that
    the displacement member (8) is arranged as a separate component in the flow chamber (7).
  9. Tumble dryer (1) having an air duct (6) according to claim 4,
    characterised in that
    the diameter (d) of the rotationally symmetrical portion (8") of the displacement member (8) is equal or approximately equal to the diameter (c) of the fan.
  10. Tumble dryer (1) having an air duct (6) according to claim 1,
    characterised in that
    the displacement member (8) is positioned on an axis arranged at an angle of inclination to the fan wheel axis.
EP08007190A 2007-05-07 2008-04-11 Tumble dryer with an air canal Not-in-force EP1990465B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200830755T SI1990465T1 (en) 2007-05-07 2008-04-11 Tumble dryer with an air canal
PL08007190T PL1990465T3 (en) 2007-05-07 2008-04-11 Tumble dryer with an air canal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007021815A DE102007021815B4 (en) 2007-05-07 2007-05-07 Clothes dryer with an air duct

Publications (2)

Publication Number Publication Date
EP1990465A1 EP1990465A1 (en) 2008-11-12
EP1990465B1 true EP1990465B1 (en) 2012-08-08

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Application Number Title Priority Date Filing Date
EP08007190A Not-in-force EP1990465B1 (en) 2007-05-07 2008-04-11 Tumble dryer with an air canal

Country Status (6)

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US (1) US8333019B2 (en)
EP (1) EP1990465B1 (en)
DE (1) DE102007021815B4 (en)
ES (1) ES2389142T3 (en)
PL (1) PL1990465T3 (en)
SI (1) SI1990465T1 (en)

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US8776394B2 (en) * 2011-10-04 2014-07-15 Whirlpool Corporation Blower for a laundry treating appliance
EP2631357B1 (en) * 2012-02-27 2016-09-07 Electrolux Home Products Corporation N.V. Rotary-drum laundry dryer
DE102012221916A1 (en) 2012-11-29 2014-06-05 BSH Bosch und Siemens Hausgeräte GmbH Housing for a radial fan and radial fan
DE102013208855B4 (en) 2013-05-14 2022-07-07 BSH Hausgeräte GmbH radial fan housing
US9227095B2 (en) * 2014-02-24 2016-01-05 Dennis Tamburro Clothes dryer vent coupling
DE102018212844A1 (en) * 2018-08-01 2020-02-06 BSH Hausgeräte GmbH Household appliance with improved acoustics
US11053632B2 (en) * 2019-07-12 2021-07-06 Haier Us Appliance Solutions, Inc. Dryer appliance and impeller housing

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Also Published As

Publication number Publication date
ES2389142T3 (en) 2012-10-23
DE102007021815B4 (en) 2011-12-15
PL1990465T3 (en) 2012-11-30
US8333019B2 (en) 2012-12-18
SI1990465T1 (en) 2013-01-31
DE102007021815A1 (en) 2008-11-20
US20080276478A1 (en) 2008-11-13
EP1990465A1 (en) 2008-11-12

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