EP2418388B1 - Ventilator - Google Patents

Ventilator Download PDF

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Publication number
EP2418388B1
EP2418388B1 EP11006481.3A EP11006481A EP2418388B1 EP 2418388 B1 EP2418388 B1 EP 2418388B1 EP 11006481 A EP11006481 A EP 11006481A EP 2418388 B1 EP2418388 B1 EP 2418388B1
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EP
European Patent Office
Prior art keywords
housing
flow
vanes
fan wheel
ventilator according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP11006481.3A
Other languages
German (de)
French (fr)
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EP2418388A8 (en
EP2418388A2 (en
EP2418388A3 (en
Inventor
Omar Sadi
Andreas Gross
Lothar Ernemann
Frieder Lörcher
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Ziehl Abegg SE
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Ziehl Abegg SE
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Priority to SI201131653T priority Critical patent/SI2418388T1/en
Publication of EP2418388A2 publication Critical patent/EP2418388A2/en
Publication of EP2418388A8 publication Critical patent/EP2418388A8/en
Publication of EP2418388A3 publication Critical patent/EP2418388A3/en
Application granted granted Critical
Publication of EP2418388B1 publication Critical patent/EP2418388B1/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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/542—Bladed diffusers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • 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
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
    • F04D29/164—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of an axial flow wheel
    • 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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
    • 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/603—Composites; e.g. fibre-reinforced

Definitions

  • the invention relates to a ventilator according to claim 1 or claim 2.
  • the WO 2004/094835 A1 describes a fan with a fan conveyor channel and fan disposed therein, which is rotatable about a central axis and has a central hub with an outer periphery on which fan blades are fixed, which extend with their radial outer edges to an outwardly limiting surface and which crescent-shaped Have leading edges and which are provided in the region of the radially outer edge with flow elements, which are designed for flow around this radially outer edge from the pressure side to the suction side compensating flow as Umströmungshindernisse.
  • the object of the invention is to disclose a fan, which has in a compact design, a further noise reduction and higher efficiency, with a protective grid is integrated with the same fan in the invention.
  • the housing (1) of the fan which is made of plastic, comprises the elements (1.1), cylindrical flow guide (1.2), guide vanes (1.3) and diffuser (1.5) which are decisive for the increase in efficiency in a compact component integrated, wherein the guide vanes simultaneously take over the connection of the motor carrier (1.4), the use of external rotor motors allows a particularly compact design.
  • the object is achieved in that profiled wing (2.2) and Nachleiteriel (1.3) are used, the radially outer ends (2.3) of the impeller blades (2.2) are provided with flow elements (winglets) and wherein the head gap between impeller blades (2.2) and cylindrical flow guide (1.2) is designed to be particularly small, which is made possible only by using special plastics and injection molding techniques.
  • the housing (1) takes over several functions at the same time and requires relatively little space.
  • the housing (1) takes over the suspension of the complete impeller (2) with its electric drive motor (5), which is designed as an external rotor motor.
  • the transmission of all forces and torques acting on the fan to the outside takes place via the guide vanes (1.3) connected to the engine mount and housing.
  • This Nachleiteriel (1.3) which reduce the peripheral component of the outflow velocity, contribute with their special profiling significantly to increase the static efficiency of the fan.
  • the inlet nozzle (1.1) of the housing in this case has the task to accelerate the fluid from the suction-side space largely loss and has this purpose in the flow direction on a special, narrowing contour.
  • this gap is made very small. Furthermore, flow elements (winglets) (2.3) ensure a significantly reduced generation of noise.
  • the flow passes downstream of the impeller (2), deflected by the Nachleiterieln (1.3), in the diffuser (1.5), ie in an expanding flow channel.
  • the diffuser (1.5) in particular the axial component of the outflow velocity is reduced, which contributes to a further increase in the efficiency and thus the performance of the fan.
  • a protective grid (3) which is designed in particular as a mesh grid, fastened.
  • Another aspect of the invention is that external rotor motors, either in AC or in EC technology, are used. This allows a particularly compact design, with EC motors still bring an additional efficiency advantage.
  • FIG. 1 shows a fan, here an axial fan in longitudinal section with its housing (1), in the flow direction a specially trained, narrowing contour of the inlet nozzle (1.1) to which a cylindrical flow guide (1.2) and thereto an expanding flow channel, a diffuser (1.5) connects.
  • the cylindrical flow guide (1.2) is the impeller (2) arranged, whose vane tips, which are designed as special flow elements (winglets), to minimize the noise generation and losses of efficiency only a very small distance from the cylindrical flow guide (1.2).
  • the impeller (2) with the housing (1) fixedly connected Nachleitulatel (1.3) are arranged, the hub side fixed to the motor carrier (1.4) are fixed to which the drive motor (5) together with impeller (2).
  • a protective grid (3) is arranged, which can be fastened both inside and outside of the diffuser (1.5).
  • FIG. 2 shows the axial fan in an oblique front view in which in the housing (1) the spatial arrangement of the impeller (2) with impeller hub (2.1) and motor (5) is shown. Also shown are fastening devices (1.6) in the inlet nozzle (1.1), which are designed here as holes.
  • FIG. 3 shows the axial fan in plan view with the inlet nozzle (1.1), impeller (2) and protective grid (3).
  • the outer shape (1.11) of the inlet nozzle (1.1) not only round, as shown here, but also have a square, rectangular or other shape.
  • FIG. 4 the axial fan is shown in an oblique rear view with protective grid (3) and centrally arranged terminal box (4).
  • Terminal box (4) can be releasably attached both to the protective grid (3) and to the motor carrier (1.4).
  • FIG. 5 shows a section of the axial fan with impeller and Nachleitulatel, in which the leading edges (2.21) of the winding wing (2.2) on the impeller hub (2.1) are preferably concave and arranged crescent-shaped leading in the direction of rotation. Furthermore, it is shown that the Nachleiteriel (1.3) are curved multi-dimensional, wherein the leading edges (1.31) are preferably sickle-shaped and their trailing edges (1.32) are preferably serrated or wavy.
  • FIG. 6 further shows a section of the axial fan, in which the trailing edges (2.22) of the wings (2.2) may be convex and serrated or wavy and whose radially outer ends are formed as a winglet (2.3).
  • the wings (2.2) designed as winglets (2.3) at the radial end contribute to a substantial reduction in the flow vortices and thus to a significant reduction in noise.

Description

Die Erfindung betrifft einen Ventilator gemäß Anspruch 1 oder Anspruch 2.The invention relates to a ventilator according to claim 1 or claim 2.

Die WO 2004/094835 A1 beschreibt einen Lüfter mit einem Lüfterförderkanal und darin angeordneten Lüfterrad, welches um eine zentrale Achse drehbar ist und eine zentrale Nabe mit einem Außenumfang aufweist, auf welchem Lüfterflügel befestigt sind, die sich mit ihren radialen Außenkanten bis zu einer nach außen begrenzenden Fläche erstrecken und welche sichelförmige Vorderkanten aufweisen und welche im Bereich des radial äußeren Randes mit Strömungselementen versehen sind, die für eine um diesen radial äußeren Rand von der Druckseite zur Saugseite verlaufende Ausgleichsströmung als Umströmungshindernisse ausgebildet sind.The WO 2004/094835 A1 describes a fan with a fan conveyor channel and fan disposed therein, which is rotatable about a central axis and has a central hub with an outer periphery on which fan blades are fixed, which extend with their radial outer edges to an outwardly limiting surface and which crescent-shaped Have leading edges and which are provided in the region of the radially outer edge with flow elements, which are designed for flow around this radially outer edge from the pressure side to the suction side compensating flow as Umströmungshindernisse.

US 2008/170935 A1 beschreibt einen Lüfter gemäß dem Oberbegriff des Anspruchs 1. US 2008/170935 A1 describes a fan according to the preamble of claim 1.

Im Fan Noise Artikel " EXPERIMENTAL AEROACOUSTIC ANALYSIS OF EFFICIENT AUTOMOTIVE ENGINE COOLING FAN SYSTEM" 2003 , ist ein energieeffizienter Lüfter für den Einsatz in Fahrzeugkühlsystemen beschrieben, bestehend aus einem Flügelrad mit Motor eingebaut in einem Gehäuse, welches die funktionellen Elementen zylindrische Strömungsführung, Diffusor und Nachleitflügel in einem Bauteil integriert, wobei hier die kompakte Bauweise des Lüfters hervorgehoben ist.In fan noise article " EXPERIMENTAL AEROACOUSTIC ANALYSIS OF EFFICIENT AUTOMOTIVE ENGINE COOLING FAN SYSTEM "2003 , an energy-efficient fan is described for use in vehicle cooling systems, consisting of an impeller with motor installed in a housing, which integrates the functional elements cylindrical flow guide, diffuser and guide vanes in one component, in which case the compact design of the fan is highlighted.

Aufgabe der Erfindung ist es einen Ventilator zu offenbaren, der in einer kompakten Bauweise eine weitere Geräuschminderung sowie einen höheren Wirkungsgrad aufweist, wobei ein Schutzgitter gleich mit in den erfindungsgemäßen Ventilator integriert ist.The object of the invention is to disclose a fan, which has in a compact design, a further noise reduction and higher efficiency, with a protective grid is integrated with the same fan in the invention.

Erfindungsgemäß wird diese Aufgabe einerseits dadurch gelöst, dass das einteilig aus Kunststoff bestehende Gehäuse (1) des Ventilators die für die Wirkungsgraderhöhung maßgeblichen Elemente Einlaufdüse (1.1), zylinderförmige Strömungsführung (1.2), Nachleitflügel (1.3) und Diffusor (1.5) in einem kompakten Bauteil integriert, wobei die Nachleitschaufeln gleichzeitig die Anbindung des Motorträgers (1.4) übernehmen, wobei die Verwendung von Außenläufermotoren eine besonders kompakte Bauweise erlaubt. Andererseits, insbesondere hinsichtlich der Geräuschminderung, wird die Aufgabe erfindungsgemäß dadurch gelöst, dass profilierte Flügel (2.2) und Nachleitflügel (1.3) verwendet werden, wobei die radial äußeren Enden (2.3) der Laufradflügel (2.2) mit Strömungselementen (Winglets) versehen sind und wobei der Kopfspalt zwischen Laufradflügel (2.2) und zylinderförmiger Strömungsführung (1.2) besonders klein ausgeführt ist, was erst durch Verwendung spezieller Kunststoffe und Spritzgusstechniken ermöglicht wird.According to the invention, this object is achieved, on the one hand, in that the housing (1) of the fan, which is made of plastic, comprises the elements (1.1), cylindrical flow guide (1.2), guide vanes (1.3) and diffuser (1.5) which are decisive for the increase in efficiency in a compact component integrated, wherein the guide vanes simultaneously take over the connection of the motor carrier (1.4), the use of external rotor motors allows a particularly compact design. On the other hand, in particular in terms of noise reduction, the object is achieved in that profiled wing (2.2) and Nachleitflügel (1.3) are used, the radially outer ends (2.3) of the impeller blades (2.2) are provided with flow elements (winglets) and wherein the head gap between impeller blades (2.2) and cylindrical flow guide (1.2) is designed to be particularly small, which is made possible only by using special plastics and injection molding techniques.

Das Gehäuse (1) übernimmt hier mehrere Funktionen gleichzeitig und benötigt dabei vergleichsweise geringen Bauraum. So übernimmt das Gehäuse (1) die Aufhängung des kompletten Flügelrads (2) mit seinem elektrischen Antriebsmotor (5), der als Außenläufermotor ausgebildet ist. Die Übertragung aller am Ventilator angreifenden Kräfte und Momente nach außen geschieht über die mit dem Motorträger und Gehäuse verbundenen Nachleitflügel (1.3). Diese Nachleitflügel (1.3), welche die Umfangskomponente der Abströmgeschwindigkeit reduzieren, tragen mit ihrer speziellen Profilierung wesentlich zur Erhöhung des statischen Wirkungs-grades des Ventilators bei. Die Einlaufdüse (1.1) des Gehäuses hat hierbei die Aufgabe, das Fluid aus dem saugseitigen Raum weitestgehend verlustarm zu beschleunigen und weist hierzu in Strömungsrichtung eine spezielle, sich verengende Kontur auf.The housing (1) takes over several functions at the same time and requires relatively little space. Thus, the housing (1) takes over the suspension of the complete impeller (2) with its electric drive motor (5), which is designed as an external rotor motor. The transmission of all forces and torques acting on the fan to the outside takes place via the guide vanes (1.3) connected to the engine mount and housing. This Nachleitflügel (1.3), which reduce the peripheral component of the outflow velocity, contribute with their special profiling significantly to increase the static efficiency of the fan. The inlet nozzle (1.1) of the housing in this case has the task to accelerate the fluid from the suction-side space largely loss and has this purpose in the flow direction on a special, narrowing contour.

Um die Verluste und die Lärmentstehung, die durch den Spalt zwischen den Flügelblattspitzen (2.3) des Flügelrades (2) und dieser Seitenwand der zylinderförmigen Strömungsführung (1.2) verursacht werden, weiter zu minimieren, wird dieser Spalt sehr klein ausgeführt. Des Weiteren sorgen Strömungselemente (Winglets) (2.3) für eine deutlich reduzierte Geräuschentstehung.In order to further minimize the losses and the generation of noise caused by the gap between the blade tips (2.3) of the impeller (2) and this side wall of the cylindrical flow guide (1.2), this gap is made very small. Furthermore, flow elements (winglets) (2.3) ensure a significantly reduced generation of noise.

Die Strömung gelangt stromab des Flügelrades (2), umgelenkt von den Nachleitflügeln (1.3), in den Diffusor (1.5), also in einen sich erweiternden Strömungskanal. Durch den Diffusor (1.5) wird insbesondere die axiale Komponente der Abströmgeschwindigkeit verringert, was zu einer weiteren Erhöhung des Wirkungsgrades und damit der Leistungsfähigkeit des Ventilators beiträgt. An das Gehäuse (1) ist weiterhin strömungsausgangsseitig ein Schutzgitter (3), welches insbesondere als Maschengitter ausgeführt ist, befestigbar. Ein weiterer Aspekt der Erfindung ist es, dass Außenläufermotoren, entweder in AC oder in EC Technologie, verwendet werden. Dies erlaubt eine besonders kompakte Bauweise, wobei EC-Motoren noch einen zusätzlichen Wirkungsgradvorteil bringen.The flow passes downstream of the impeller (2), deflected by the Nachleitflügeln (1.3), in the diffuser (1.5), ie in an expanding flow channel. By the diffuser (1.5) in particular the axial component of the outflow velocity is reduced, which contributes to a further increase in the efficiency and thus the performance of the fan. On the housing (1) is further flow outlet side, a protective grid (3), which is designed in particular as a mesh grid, fastened. Another aspect of the invention is that external rotor motors, either in AC or in EC technology, are used. This allows a particularly compact design, with EC motors still bring an additional efficiency advantage.

Die Erfindung wird an einem Ausführungsbeispiel näher beschrieben.The invention will be described in more detail using an exemplary embodiment.

Es zeigen:

Figur 1
einen Ventilator im Längsschnitt
Figur 2
einen Ventilator in raumbildlicher Vorderansicht
Figur 3
einen Ventilator in Draufsicht
Figur 4
einen Ventilator in raumbildlicher Hinteransicht
Figur 5
einen Ventilatorausschnitt mit Flügelrad und Nachleitflügel
Figur 6
einen Ventilatorausschnitt mit Flügelkonturen
Show it:
FIG. 1
a fan in longitudinal section
FIG. 2
a fan in three-dimensional front view
FIG. 3
a fan in plan view
FIG. 4
a fan in three-dimensional rear view
FIG. 5
a fan cutout with impeller and guide vanes
FIG. 6
a fan cutout with wing contours

Figur 1 zeigt einen Ventilator, hier einen Axialventilator im Längsschnitt mit seinem Gehäuse (1), das in Strömungsrichtung eine speziell ausgebildete, sich verengende Kontur der Einlaufdüse (1.1) aufweist an die sich eine zylinderförmige Strömungsführung (1.2) sowie hieran ein sich erweiternder Strömungskanal, ein Diffusor (1.5) anschließt. In der engsten Stelle des Gehäuses (1), der zylinderförmigen Strömungsführung (1.2) ist das Flügelrad (2) angeordnet, dessen Flügelblattspitzen, welche als spezielle Strömungselemente (Winglets) ausgeführt sind, zur Minimierung der Lärmentstehung und Verluste des Wirkungsgrades einen nur sehr geringen Abstand zur zylinderförmigen Strömungsführung (1.2) aufweisen. Hinter dem Flügelrad (2) sind die mit dem Gehäuse (1) fest verbundenen Nachleitflügel (1.3) angeordnet, die nabeseitig mit dem Motorträger (1.4) fest verbunden sind, an welchem der Antriebsmotor (5) mitsamt Flügelrad (2) befestigt werden. Endseitig des Gehäuses (1) ist ein Schutzgitter (3) angeordnet, welches sowohl innerhalb als auch außerhalb des Diffusors (1.5) befestigbar ist. FIG. 1 shows a fan, here an axial fan in longitudinal section with its housing (1), in the flow direction a specially trained, narrowing contour of the inlet nozzle (1.1) to which a cylindrical flow guide (1.2) and thereto an expanding flow channel, a diffuser (1.5) connects. In the narrowest point of the housing (1), the cylindrical flow guide (1.2) is the impeller (2) arranged, whose vane tips, which are designed as special flow elements (winglets), to minimize the noise generation and losses of efficiency only a very small distance from the cylindrical flow guide (1.2). Behind the impeller (2) with the housing (1) fixedly connected Nachleitflügel (1.3) are arranged, the hub side fixed to the motor carrier (1.4) are fixed to which the drive motor (5) together with impeller (2). End of the housing (1), a protective grid (3) is arranged, which can be fastened both inside and outside of the diffuser (1.5).

Figur 2 zeigt den Axialventilator in einer schrägen Vorderansicht, bei dem im Gehäuse (1) die räumliche Anordnung des Flügelrades (2) mit Flügelradnabe (2.1) und Motor (5) dargestellt ist. Weiterhin dargestellt sind Befestigungsvorrichtungen (1.6) in der Einlaufdüse (1.1), die hier als Bohrungen ausgeführt sind. FIG. 2 shows the axial fan in an oblique front view in which in the housing (1) the spatial arrangement of the impeller (2) with impeller hub (2.1) and motor (5) is shown. Also shown are fastening devices (1.6) in the inlet nozzle (1.1), which are designed here as holes.

Figur 3 zeigt den Axialventilator in der Draufsicht mit der Einlaufdüse (1.1), Flügelrad (2) und Schutzgitter (3). Hierbei kann die Außenform (1.11) der Einlaufdüse (1.1) nicht nur rund, wie hier dargestellt, sondern auch eine quadratische, rechteckige oder eine andere Form aufweisen. FIG. 3 shows the axial fan in plan view with the inlet nozzle (1.1), impeller (2) and protective grid (3). Here, the outer shape (1.11) of the inlet nozzle (1.1) not only round, as shown here, but also have a square, rectangular or other shape.

In Figur 4 ist der Axialventilator in einer schrägen Hinteransicht mit Schutzgitter (3) und mittig angeordnetem Klemmenkasten (4) dargestellt. Klemmenkasten (4) kann sowohl am Schutzgitter (3) als auch am Motorträger (1.4) lösbar angebracht werden.In FIG. 4 the axial fan is shown in an oblique rear view with protective grid (3) and centrally arranged terminal box (4). Terminal box (4) can be releasably attached both to the protective grid (3) and to the motor carrier (1.4).

Figur 5 zeigt einen Ausschnitt des Axialventilators mit Flügelrad und Nachleitflügel, bei dem die Vorderkanten (2.21) der gewundenen Flügel (2.2) auf der Flügelradnabe (2.1) vorzugsweise konkav ausgebildet und in Drehrichtung sichelförmig voreilend angeordnet sind. Weiterhin ist dargestellt, dass die Nachleitflügel (1.3) mehrdimensional gewölbt sind, wobei deren Vorderkanten (1.31) vorzugsweise sichelförmig und deren Hinterkanten (1.32) vorzugsweise gezackt oder wellenförmig ausgebildet sind. FIG. 5 shows a section of the axial fan with impeller and Nachleitflügel, in which the leading edges (2.21) of the winding wing (2.2) on the impeller hub (2.1) are preferably concave and arranged crescent-shaped leading in the direction of rotation. Furthermore, it is shown that the Nachleitflügel (1.3) are curved multi-dimensional, wherein the leading edges (1.31) are preferably sickle-shaped and their trailing edges (1.32) are preferably serrated or wavy.

Figur 6 zeigt weiterhin einen Ausschnitt des Axialventilators, bei dem die Hinterkanten (2.22) der Flügel (2.2) konvex und gezackt oder wellenförmig sein können und deren radial äußere Enden als Winglet (2.3) ausgebildet sind. Die radial endseitig als Winglets (2.3) ausgebildeten Flügel (2.2) tragen zu einer wesentlichen Reduzierung der Strömungswirbel bei und damit zu einer deutlichen Lärmminderung. FIG. 6 further shows a section of the axial fan, in which the trailing edges (2.22) of the wings (2.2) may be convex and serrated or wavy and whose radially outer ends are formed as a winglet (2.3). The wings (2.2) designed as winglets (2.3) at the radial end contribute to a substantial reduction in the flow vortices and thus to a significant reduction in noise.

Claims (13)

  1. Ventilator, in particular for use in the airconditioning and refrigerating technology, comprising a housing (1), a fan wheel (2), which is rotatably mounted about a central axis, and a drive motor (5), of which the housing (1) is produced in one piece in plastic and into which the flow elements inlet nozzle (1.1), flow guide (1.2), outlet guide vanes (1.3) and diffusor (1.5) are integrated wherein the outlet guide vanes (1.3) are arranged downstream of the fan wheel (2) and also fasten the motor connection (1.4) to the outer contour and the drive motor (5) is an external rotor motor, which is designed as an electronically commutated DC motor (EC), wherein the flow guide (1.2) is cylindrical and wherein the fan wheel (2) is arranged at the narrowest point of the housing (1) of the cylindrical flow guide (1.2),
    characterised in that the housing (1) with the inlet nozzle (1.1), cylindrical flow guide (1.2), outlet guide vanes (1.3), motor support (1.4) and diffusor (1.5) is made of fibre-glass reinforced plastic, in that the ventilator has a protective grille (3), which on the flow outlet side is arranged on the housing (1) in the direction of flow behind the outlet guide vanes (1.3) on a device provided on the housing (1), and in that the radially outward lying vane ends (2.3) of the vanes (2.2) of the fan wheel (2) are designed as winglets which are at a small distance from the side wall of the flow guide (1.2).
  2. Ventilator, in particular for use in the airconditioning and refrigerating technology, comprising a housing (1), a fan wheel (2), which is rotatably mounted about a central axis, and a drive motor (5), of which the housing (1) is produced in one piece in plastic and into which the flow elements inlet nozzle (1.1), flow guide (1.2), outlet guide vanes (1.3) and diffusor (1.5) are integrated wherein the outlet guide vanes (1.3) are arranged downstream of the fan wheel (2) and also fasten the motor connection (1.4) to the outer contour and the drive motor (5) is an external rotor motor, wherein the flow guide (1.2) is cylindrical and wherein the fan wheel (2) is arranged at the narrowest point of the housing (1) of the cylindrical flow guide (1.2),
    characterised in that the housing (1) with the inlet nozzle (1.1), cylindrical flow guide (1.2), outlet guide vanes (1.3), motor support (1.4) and diffusor (1.5) is made of fibre-glass reinforced plastic, in that the ventilator has a protective grille (3), which on the flow outlet side is arranged on the housing (1) in the direction of flow behind the outlet guide vanes (1.3) on a device provided on the housing (1), and in that the radially outward lying vane ends (2.3) of the vanes (2.1) of the fan wheel (2) are designed as winglets which are at a small distance from the side wall of the flow guide (1.2) and in that the drive motor (5) is designed as an rotary current asynchronous motor (AC).
  3. Ventilator according to claim 1 or 2,
    characterised in that the outlet guide vanes (1.3) are multi-dimensionally curved, wherein their forward edges (1.31) are preferably sickle-shaped and their rear edges (1.32) are preferably serrated or undulating.
  4. Ventilator according to any one of claims 1 to 3, characterised in that sickle-shaped forward edge 1.31) of the outlet guide vanes (1.3) are preferably arranged inclined against the direction of rotation of the fan wheel (2).
  5. Ventilator according to any one of claims 1 to 4, characterised in that an odd number of outlet guide vanes (1.3) is arranged on the motor support (1.4) in the housing (4).
  6. Ventilator according to any one of claims 1 to 5, characterised in that the fan wheel (2) has a hub (2.1) on which several tortuous vanes (2.2) are arranged.
  7. Ventilator according to any one of claims 1 to 6, characterised in that the forward edges (2.21) of the vanes (2.2) are preferably concave and in the direction of rotation are arranged to lead in a sickle-shaped manner.
  8. Ventilator according to any one of claims 1 to 7, characterised in that the rear edges (2.22) of the vanes (2.2) are convex, serrated or undulating.
  9. Ventilator according to any one of claims 1 to 8, characterised in that the hub (2.1) of the fan wheel (2) is designed in conically widening manner in the flow direction.
  10. Ventilator according to any one of claims 1 to 9,
    characterised on the housing (1) on the downstream side of the motor support (1.4) a terminal box is arranged.
  11. Ventilator according to claim 10,
    characterised in that the cover for the terminal box 4) is integrated in one piece on the protective grille (3).
  12. Ventilator according to any of claims 1 to 11,
    characterised in that circumferential fastening devices (1.6), preferably in the form of openings, are provided in the outer area of the inlet nozzle (1.1).
  13. Ventilator according to any one of claims 1 to 12,
    characterised in that the outer shape (1.11) of the inlet nozzle (1.1) is preferably round, quadratic or rectangular.
EP11006481.3A 2010-08-12 2011-08-06 Ventilator Active EP2418388B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201131653T SI2418388T1 (en) 2010-08-12 2011-08-06 Ventilator

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DE102010034036 2010-08-12
DE102011015784A DE102011015784A1 (en) 2010-08-12 2011-04-01 fan

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EP2418388A2 EP2418388A2 (en) 2012-02-15
EP2418388A8 EP2418388A8 (en) 2012-07-18
EP2418388A3 EP2418388A3 (en) 2013-09-11
EP2418388B1 true EP2418388B1 (en) 2018-10-10

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US (1) US9103352B2 (en)
EP (1) EP2418388B1 (en)
CN (1) CN102374178A (en)
BR (1) BRPI1106264B1 (en)
DE (1) DE102011015784A1 (en)
ES (1) ES2700273T3 (en)
RU (1) RU2584051C2 (en)
SI (1) SI2418388T1 (en)

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Also Published As

Publication number Publication date
EP2418388A8 (en) 2012-07-18
EP2418388A2 (en) 2012-02-15
BRPI1106264A2 (en) 2013-05-21
RU2011133879A (en) 2013-02-20
BRPI1106264B1 (en) 2020-10-20
CN102374178A (en) 2012-03-14
US9103352B2 (en) 2015-08-11
US20120039731A1 (en) 2012-02-16
EP2418388A3 (en) 2013-09-11
ES2700273T3 (en) 2019-02-14
DE102011015784A1 (en) 2012-02-16
SI2418388T1 (en) 2019-03-29
RU2584051C2 (en) 2016-05-20
DE102011015784A8 (en) 2012-06-06

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