EP2242930B1 - Compact fan - Google Patents

Compact fan Download PDF

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Publication number
EP2242930B1
EP2242930B1 EP09712411A EP09712411A EP2242930B1 EP 2242930 B1 EP2242930 B1 EP 2242930B1 EP 09712411 A EP09712411 A EP 09712411A EP 09712411 A EP09712411 A EP 09712411A EP 2242930 B1 EP2242930 B1 EP 2242930B1
Authority
EP
European Patent Office
Prior art keywords
front plate
spacers
fan according
compact
holding means
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.)
Active
Application number
EP09712411A
Other languages
German (de)
French (fr)
Other versions
EP2242930A1 (en
Inventor
Thomas Heli
Jürgen Schöne
Christian Haag
Alfred Korwin
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.)
Ebm Papst Mulfingen GmbH and Co KG
Original Assignee
Ebm Papst Mulfingen GmbH and Co 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 Ebm Papst Mulfingen GmbH and Co KG filed Critical Ebm Papst Mulfingen GmbH and Co KG
Publication of EP2242930A1 publication Critical patent/EP2242930A1/en
Application granted granted Critical
Publication of EP2242930B1 publication Critical patent/EP2242930B1/en
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Anticipated expiration legal-status Critical

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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
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials 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
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/626—Mounting or removal of fans
    • 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
    • F05D2230/00—Manufacture
    • F05D2230/50—Building or constructing in particular ways
    • F05D2230/53—Building or constructing in particular ways by integrally manufacturing a component, e.g. by milling from a billet or one piece construction
    • 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

Definitions

  • the present invention relates to a compact fan according to the preamble of claim 1.
  • Such a compact fan is z. B. from the DE 298 21 861 U1 known.
  • the individual spacers are designed as wall sections, between which outlet openings are present.
  • the front plate is lid-shaped and the radial fan is located within a formed by the motor mount and housing wall-like spacers interior
  • the present invention is based on the object to realize a montageetechnically simple and compact design, with improved flow characteristics.
  • the spacers are partially formed integrally with the front panel and the motor mount by the spacers consist of connected to the front panel and the motor mount sections and the spacers perpendicular or oblique to the front panel and the motor mount and formed as flow profiles are.
  • An in Fig. 1 illustrated compact fan consists of a fan, in particular radial fan 1, which is mounted on a rotor of an external rotor motor 2, in particular is pressed.
  • the fan 1 consists of a front cover plate 3 and a rear cover plate. 4
  • the front cover plate 3 has a circular air inlet opening 7, see Fig. 2 ,
  • the external rotor motor 2 is mounted with the radial fan 1 between a front plate 8 with an air inlet opening 9 and a motor mount 11, as shown in FIG Fig. 3 is shown.
  • the front plate 8 and the motor mount 11 are interconnected by a plurality of circumferentially arranged on the circumference of the two parts 8, 11 spacers 12.
  • the spacers 12 define the width of an air outlet gap 13 formed circumferentially around the radial fan wheel 1.
  • the front plate 8 and the motor mount 11 and the spacers 12 are formed here as an integral plastic or metal injection molded part.
  • the circular air inlet opening 9 has an inner edge region 14 formed as an inlet nozzle.
  • this inner nozzle region 14 protrudes into the air inlet opening 7 of the front cover disk 3, so that its inner diameter is slightly larger than the outer diameter of the inlet nozzle 14.
  • the external rotor motor 2 is fastened with its stator flange 16 to the motor mount 11 by means of an intermediate mount 17, namely on a peripherally closed edge web 18 of the motor mount 11.
  • the intermediate support 17 has a middle retaining plate 19, to which the motor flange 16 is fastened, for example by means of screws.
  • Extending radially outwardly from the middle retaining disk 19 are a plurality of spoke webs 21, which are connected in the region of their free ends by a circumferential annular web 22.
  • the spoke webs 21 continue with web extensions 23 over the annular web 22 radially outward.
  • the spoke webs 21 are in cross-section as unilaterally open channels, ie formed in cross-section U-shaped, which is useful for strength and Materialerspamishuntn.
  • the intermediate support 17 may be made as a plastic injection molded part or as a metal molding, in particular as a metal casting. In the case of training as a metal molding, the intermediate bracket 17 serves as a heat conducting element at the same time.
  • the motor mount 11 has on its side facing away from the front panel 8 side 24 receiving pockets 26 which serve to receive the web extensions 23 in the assembled state of the intermediate bracket 7 on the motor mount 11.
  • four spoke webs 21 are integrally formed on the middle retaining disk 19, these spoke webs 21 each having their respective extensions right angle lock in.
  • the spoke webs 21 in this case do not run exactly radially, but are each arranged offset radially to the central axis.
  • the annular web 22 is also U-shaped in cross-section as a channel open on one side, again for material spam reasons and for increasing the rigidity.
  • a correspondingly adapted to the spoke webs 21 embodiment also has the middle holding notes 19.
  • the web extensions 23 On its upper side, the web extensions 23 have lugs 27, which in the assembled state of the intermediate mount 7 in adapted recesses 28 (FIG. Fig. 1 ) engage in the receiving pockets 26 for the positioning of the parts to each other.
  • the intermediate support 17 connected to the external rotor motor 2 is connected to the motor mount 11 by screw connections.
  • the external rotor motor 2 preassembled on the intermediate support 17 with the radial fan wheel 1 mounted on it is introduced through a circular receiving opening 29 of the motor mount 11 into the space between the front plate 8 and the motor mount 11.
  • the diameter of the receiving opening 29 is slightly larger than the outer diameter of the Radialzuffterrades 1.
  • the spacers 12 are formed as approximately rectangular cross-section struts with chamfered corners, which extend perpendicular to the front plate 8 and the edge web 18.
  • the web-shaped spacers 12 have the shape of flow profiles. These are expediently wing profiles that are optimized aerodynamically and aeroacoustically. By avoiding air separations or vortices on the spacer profiles, there are thus no negative effects on the air power and the noise due to the spacers 12 themselves.
  • the flow-profile-like spacers 12 have, as is the case Fig. 4 can be seen, a longitudinal axis X and a transverse axis Y, wherein the longitudinal axis X is longer than the transverse axis Y.
  • the flow-profile-shaped spacers 12 are arranged such that they are aligned with its rounded front against the direction of rotation Z.
  • the longitudinal axis X thereof runs at an acute angle ⁇ preferably from -10 ° ⁇ ⁇ ⁇ 60 ° to a tangent T which is applied to the circular circumference of the radial fan wheel 1, or to the straight line P running parallel to the tangent T.
  • a further optimization according to the invention consists of the distance A of the spacers from the center point or the center axis M of the radial fan wheel 1 Optimize, wherein preferably the strut distance A is such that 1.05 x R ⁇ A ⁇ 1.5 R, where R is the radius of the radial fan wheel 1.
  • the air inlet opening 9 of the front panel 8 can be closed with a protective grid 32.
  • the protective grid 32 which is designed in particular as a plastic injection-molded part, by means of a clip connection with the front panel 8 is locked.
  • the front panel 8 is preferably dimensioned such that it projects beyond the motor mount 11 at its outer edge.
  • the compact fan can be plugged through a through opening in a compact fan receiving wall or a housing until the front panel 8 rests against the compact fan receiving wall and the insertion opening is thereby covered.
  • the compact fan can be secured according to the screw.
  • the front plate 8 and the motor mount 11 preferably have a square shape, with the corners 30, 35 each being chamfered.
  • Fig. 5 is an alternative embodiment of a compact fan to the Fig. 1 to 4 shown.
  • the intermediate holder consists of the middle holding plate 19 and formed on this spoke webs 21.
  • spoke webs 21 There are four circumferentially uniformly distributed spoke webs 21 which are arcuately shaped in this embodiment.
  • the spoke webs 21 are directly connected to the edge web 18 of the motor mount 11, so that in this embodiment, no annular web is present.
  • the spacers 12 are formed as streamlined, arcuate cross-section struts. In this case, the arc shape is selected such that there is a convex to the interior of the compact fan contour of the arcuate struts.
  • the spacers 12 extend obliquely to the front plate 8 and the edge web 18 and start and end respectively in the corners 30 and 35. Furthermore, it can be seen that a terminal box 40 is partially present in the space between the radial fan 1 and the front panel 8. Instead of a terminal box 40 for the electrical connection, only a simple cable connection can be provided.
  • FIG. 6 to 8 an embodiment of a compact ventilator according to the invention is shown.
  • the motor mount 11 consists of a central retaining disk 19 for attachment of the stator flange 16 of an external rotor motor 2. From this central retaining disk 19 extend approximately radial spoke webs 21 outward, which terminate in a peripherally closed edge web 37. Thus, the edge web 37, the spoke webs 21 and the middle retaining plate 19, the motor mount 11.
  • both the front plate 8 and the motor mount 11 on their sides facing each other sections 38, 39 of the spacer 12. These sections 38, 39 may be the same length or different lengths.
  • the assembly of the compact fan according to the invention is in this case such that initially the radial fan 1 with the external rotor motor 2 is secured schraubmul on the motor mount 11, on the front panel 8 facing side of the motor mount 11. Thereafter, the motor mount 11 with the front panel in the abutting portions 38, 39 of the spacers 12 connected by, for example, fastening screws are screwed through the sections 39, 39. This is preferably done from the back of the motor mount 11.
  • the intermediate mounting position with the radial fan 1 connected to the engine mount 11 is in FIG Fig. 7 shown. Fig.
  • the front panel 8 and the motor mount 11 are made in particular as plastic injection molded parts.
  • the protective grid 32 can be clipped on or can also be formed in one piece with the front panel 8.
  • the front plate 8 and the motor mount 11, in particular its edge web 18, also have an approximately square peripheral contour, wherein the corners of the square are each bevelled.
  • the invention is not limited to such a configuration of the front panel 8 and the motor mount 11. Both the front plate 8 and the motor mount 11 can be stiffened by ribs 34, 35.

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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 present invention relates to a compact fan, comprising a fan wheel, in particular a radial fan wheel (1), which is fastened on a rotor of an external rotor motor (82). The fan wheel (1) is supported between a front plate (8) having an air inlet opening (9), which is central, and a motor mount (11). The front plate (8) and the motor mount (11) are connected to one another via multiple spacers (12), which are disposed around the circumference. The front plate (8) and the motor mount (11) are formed as plastic or metal spray parts. The spacers (12) are formed as plastic or metal parts entirely or partially in one piece to the front plate (8) and/or the motor mount (11).

Description

Die vorliegende Erfindung betrifft einen Kompaktlüfter gemäß dem Oberbegriff des Anspruchs 1.The present invention relates to a compact fan according to the preamble of claim 1.

Ein derartiger Kompaktlüfter ist z. B. aus der DE 298 21 861 U1 bekannt. Dabei sind die einzelnen Abstandhalter als Wandabschnitte ausgebildet, zwischen denen Ausblasöffnungen vorhanden sind. Bei diesem bekannten Kompaktlüfter ist die Frontplatte deckelförmig ausgebildet und das Radiallüfterrad befindet sich innerhalb einem von der Motorhalterung und von gehäusewandartigen Abstandhaltern gebildeten InnenraumSuch a compact fan is z. B. from the DE 298 21 861 U1 known. The individual spacers are designed as wall sections, between which outlet openings are present. In this known compact fan, the front plate is lid-shaped and the radial fan is located within a formed by the motor mount and housing wall-like spacers interior

Ausgehend von einem derartigen Kompaktlüfter liegt der vorliegenden Erfindung die Aufgabe zu Grunde, eine montagetechnisch einfache und kompakte Konstruktion zu verwirklichen, mit verbesserten Strömungseigenschaften.Based on such a compact fan, the present invention is based on the object to realize a montageetechnically simple and compact design, with improved flow characteristics.

Erfindungsgemäß wird dies dadurch erreicht, dass die Abstandhalter teilweise einstückig mit der Frontplatte und der Motorhalterung ausgebildet sind, indem die Abstandhalter aus mit der Frontplatte und der Motorhalterung verbundenen Teilstücken bestehen und die Abstandhalter senkrecht oder schräg zu der Frontplatte und der Motorhalterung verlaufen und als Strömungsprofile ausgebildet sind.According to the invention this is achieved in that the spacers are partially formed integrally with the front panel and the motor mount by the spacers consist of connected to the front panel and the motor mount sections and the spacers perpendicular or oblique to the front panel and the motor mount and formed as flow profiles are.

Somit wird erfindungsgemäß eine herstellungstechnisch einfache Konstruktion geschaffen, da das aus Frontplatte und Motorhalterung gebildete Gehäuse nur aus zwei Einzelteilen besteht. Zudem können alle wesentlichen Funktionen in das Gehäuse integriert werden. Durch die Ausbildung als Strömungsprofile werden Luftablösungen bzw. Verwirbelungen an den Abstandhaltem vermieden. Vorteilhafte Ausführungen der Erfindung sind in den Unteransprüchen enthalten und werden an Hand der in den beiliegenden Zeichnungen dargestellten Ausführungsbeispiele näher erläutert.Thus, a manufacturing technology simple construction is created according to the invention, since the housing formed from the front panel and motor mount only consists of two parts. In addition, all essential functions can be integrated into the housing. Through the training as Airfoils are avoided air separation or turbulence at the Abstandhaltem. Advantageous embodiments of the invention are contained in the subclaims and will be explained in more detail with reference to the embodiments illustrated in the accompanying drawings.

In den nachstehenden Figuren sind die gleichen Teile mit denselben Bezugsziffern jeweils gekennzeichnet.In the following figures, the same parts are identified by the same reference numerals.

Es zeigen:

Fig. 1
eine Explosionsansicht einer Ausführungsorm eines Kompaktlüfters,
Fig. 2
eine Ansicht des Kompaktlüfters gemäß Fig. 1 in Blickrichtung II in Fig. 1,
Fig. 3
eine Ansicht des Kompaktlüfters gemäß Fig. 2 im fertig montierten Zustand,
Fig. 4
einen Schnitt entlang der Schnittlinie IV-IV in Fig. 3,
Fig. 5
eine Ansicht einer weiteren Ausführungsform eines Kompaktlüfters,
Fig. 6
eine Ausführung eines erfindungsgemäßen Kompaktlüfters in Explosionsdarstellung,
Fig. 7
eine Ansicht des Kompaktlüfters gemäß Fig. 6 in einer Vormontagestellung,
Fig. 8
eine Ansicht des fertig montierten Kompaktlüfters gemäß Fig. 6.
Show it:
Fig. 1
an exploded view of an embodiment of a compact fan,
Fig. 2
a view of the compact fan according to Fig. 1 in viewing direction II in Fig. 1 .
Fig. 3
a view of the compact fan according to Fig. 2 in the assembled state,
Fig. 4
a section along the section line IV-IV in Fig. 3 .
Fig. 5
a view of another embodiment of a compact fan,
Fig. 6
an embodiment of a compact fan according to the invention in an exploded view,
Fig. 7
a view of the compact fan according to Fig. 6 in a pre-assembly,
Fig. 8
a view of the fully assembled compact fan according to Fig. 6 ,

Ein in Fig. 1 dargestellter Kompaktlüfter besteht aus einem Lüfterrad, insbesondere Radiallüfterrad 1, das auf einem Rotor eines Außenläufermotors 2 befestigt, insbesondere aufgepresst ist. Das Lüfterrad 1 besteht aus einer vorderen Deckscheibe 3 und einer hinteren Deckscheibe 4.An in Fig. 1 illustrated compact fan consists of a fan, in particular radial fan 1, which is mounted on a rotor of an external rotor motor 2, in particular is pressed. The fan 1 consists of a front cover plate 3 and a rear cover plate. 4

Zwischen diesen beiden Deckscheiben 3, 4 sind rückwärts gekrümmte Schaufeln 6 angeordnet. Die vordere Deckscheibe 3 besitzt eine kreisförmige Lufteinlassöffnung 7, siehe Fig. 2. Im dargestellten Ausführungsbeispiel wird der Außenläufermotor 2 mit dem Radiallüfterrad 1 zwischen einer Frontplatte 8 mit einer Lufteinlassöffnung 9 und einer Motorhalterung 11 gelagert, wie dies in Fig. 3 dargestellt ist. Die Frontplatte 8 und die Motorhalterung 11 sind durch mehrere umfangsgemäß am Umfang der beiden Teile 8, 11 angeordnete Abstandshalter 12 miteinander verbunden. Die Abstandshalter 12 definieren hierbei die Breite eines umfangsgemäß um das Radiallüfterrad 1 herum ausgebildeten Luftaustrittsspaltes 13. Die Frontplatte 8 und die Motorhalterung 11 sowie die Abstandhalter 12 sind hierbei als einstückiges aus Kunststoff oder Metall bestehendes Spritzgussteil ausgebildet. Die kreisförmige Lufteinlassöffnung 9 besitzt einen als Einströmdüse geformten Innenrandbereich 14. Dieser einströmdüsenartige Innenrandbereich 14 (Einströmdüse) ragt im montierten Zustand in die Lufteinlassöffnung 7 der vorderen Deckscheibe 3 hinein, so dass deren Innendurchmesser etwas größer ist als der Außendurchmesser der Einströmdüse 14.Between these two shrouds 3, 4 rearwardly curved blades 6 are arranged. The front cover plate 3 has a circular air inlet opening 7, see Fig. 2 , In the illustrated embodiment, the external rotor motor 2 is mounted with the radial fan 1 between a front plate 8 with an air inlet opening 9 and a motor mount 11, as shown in FIG Fig. 3 is shown. The front plate 8 and the motor mount 11 are interconnected by a plurality of circumferentially arranged on the circumference of the two parts 8, 11 spacers 12. In this case, the spacers 12 define the width of an air outlet gap 13 formed circumferentially around the radial fan wheel 1. The front plate 8 and the motor mount 11 and the spacers 12 are formed here as an integral plastic or metal injection molded part. The circular air inlet opening 9 has an inner edge region 14 formed as an inlet nozzle. In the installed state, this inner nozzle region 14 (inlet nozzle) protrudes into the air inlet opening 7 of the front cover disk 3, so that its inner diameter is slightly larger than the outer diameter of the inlet nozzle 14.

Der Außenläufermotor 2 wird mit seinem Statorflansch 16 mittels einer Zwischenhalterung 17 an der Motorhalterung 11, und zwar an einem umfangsgemäß geschlossenen Randsteg 18 der Motorhalterung 11 befestigt. Die Zwischenhalterung 17 besitzt eine mittlere Haltescheibe 19, an der der Motorflansch 16 beispielsweise mittels Schrauben befestigt wird. Von der mittleren Haltescheibe 19 erstrecken sich etwa radial nach außen mehrere Speichenstege 21, die im Bereich ihrer freien Enden durch einen umlaufenden Ringsteg 22 verbunden sind. Die Speichenstege 21 setzen sich mit Stegfortsätzen 23 über dem Ringsteg 22 radial nach außen fort. Die Speichenstege 21 sind im Querschnitt als einseitig offene Kanäle, d. h. im Querschnitt U-förmig ausgebildet, was aus Festigkeits- und Materialerspamisgründen zweckmäßig ist. Gleichzeitig kann hierdurch einer der Speichenstege 21 zur Aufnahme eines Motoranschlusskabels dienen. Die Zwischenhalterung 17 kann als Kunststoffspritzgussteil oder als Metallformteil, insbesondere als Metallgussteil hergestellt sein. Im Falle der Ausbildung als Metallformteil dient die Zwischenhalterung 17 gleichzeitig als Wärmeleitelement. Die Motorhalterung 11 besitzt auf ihrer von der Frontplatte 8 abgekehrten Seite 24 Aufnahmetaschen 26, die zur Aufnahme der Stegfortsätze 23 im montierten Zustand der Zwischenhalterung 7 an der Motorhalterung 11 dienen. Im dargestellten Ausführungsbeispiel sind vier Speichenstege 21 an der mittleren Haltescheibe 19 angeformt, wobei diese Speichenstege 21 jeweils mit ihren jeweiligen Verlängerungen rechte Winkel einschließen. Die Speichenstege 21 verlaufen hierbei nicht exakt radial, sondern sind jeweils zur Mittelachse radial versetzt verlaufend angeordnet. Wie die Speichenstege 21 ist auch der Ringsteg 22 im Querschnitt U-förmig als einseitig offener Kanal ausgebildet, und zwar wiederum aus Materialerspamisgründen und zur Erhöhung der Steifigkeit. Eine entsprechend an die Speichenstege 21 angepasste Ausführung besitzt auch die mittlere Haltescheine 19. Auf ihrer Oberseite besitzen die Stegfortsätze 23 Ansätze 27, die im montierten Zustand der Zwischenhalterung 7 in angepasste Vertiefungen 28 (Fig. 1) in den Aufnahmetaschen 26 für die Positionierung der Teile zueinander eingreifen. Die mit dem Außenläufermotor 2 verbundene Zwischenhalterung 17 wird durch Schraubverbindungen mit der Motorhalterung 11 verbunden. Hierzu wird der auf der Zwischenhalterung 17 vormontierte Außenläufermotor 2 mit dem auf diesem befestigten Radiallüfterrad 1 durch eine kreisförmige Aufnahmeöffnung 29 der Motorhalterung 11 in den Zwischenraum zwischen der Frontplatte 8 und der Motorhalterung 11 eingeführt. Hierzu ist der Durchmesser der Aufnahmeöffnung 29 etwas größer als der Außendurchmesser des Radiallüfterrades 1. Wie in Fig. 1, 2 dargestellt ist, sind die Abstandhalter 12 als etwa im Querschnitt rechteckige Streben mit abgeschrägten Ecken ausgebildet, die senkrecht zur Frontplatte 8 und zum Randsteg 18 verlaufen.The external rotor motor 2 is fastened with its stator flange 16 to the motor mount 11 by means of an intermediate mount 17, namely on a peripherally closed edge web 18 of the motor mount 11. The intermediate support 17 has a middle retaining plate 19, to which the motor flange 16 is fastened, for example by means of screws. Extending radially outwardly from the middle retaining disk 19 are a plurality of spoke webs 21, which are connected in the region of their free ends by a circumferential annular web 22. The spoke webs 21 continue with web extensions 23 over the annular web 22 radially outward. The spoke webs 21 are in cross-section as unilaterally open channels, ie formed in cross-section U-shaped, which is useful for strength and Materialerspamisgründen. At the same time this can serve one of the spoke webs 21 for receiving a motor connection cable. The intermediate support 17 may be made as a plastic injection molded part or as a metal molding, in particular as a metal casting. In the case of training as a metal molding, the intermediate bracket 17 serves as a heat conducting element at the same time. The motor mount 11 has on its side facing away from the front panel 8 side 24 receiving pockets 26 which serve to receive the web extensions 23 in the assembled state of the intermediate bracket 7 on the motor mount 11. In the illustrated embodiment, four spoke webs 21 are integrally formed on the middle retaining disk 19, these spoke webs 21 each having their respective extensions right angle lock in. The spoke webs 21 in this case do not run exactly radially, but are each arranged offset radially to the central axis. Like the spoke webs 21, the annular web 22 is also U-shaped in cross-section as a channel open on one side, again for material spam reasons and for increasing the rigidity. A correspondingly adapted to the spoke webs 21 embodiment also has the middle holding notes 19. On its upper side, the web extensions 23 have lugs 27, which in the assembled state of the intermediate mount 7 in adapted recesses 28 (FIG. Fig. 1 ) engage in the receiving pockets 26 for the positioning of the parts to each other. The intermediate support 17 connected to the external rotor motor 2 is connected to the motor mount 11 by screw connections. For this purpose, the external rotor motor 2 preassembled on the intermediate support 17 with the radial fan wheel 1 mounted on it is introduced through a circular receiving opening 29 of the motor mount 11 into the space between the front plate 8 and the motor mount 11. For this purpose, the diameter of the receiving opening 29 is slightly larger than the outer diameter of the Radialzuffterrades 1. As in Fig. 1 . 2 is shown, the spacers 12 are formed as approximately rectangular cross-section struts with chamfered corners, which extend perpendicular to the front plate 8 and the edge web 18.

Wie sich insbesondere aus Fig. 4 ergibt, ist es vorteilhaft, wenn die stegförmigen Abstandshalter 12 die Form von Strömungsprofilen besitzen. Hierbei handelt es sich zweckmäßigerweise um Flügelprofile, die aerodynamisch und aeroakustisch optimiert sind. Durch die Vermeidung von Luftablösungen bzw. Wirbeln an den Abstandhalterprofilen ergeben sich somit keine negativen Auswirkungen auf die Luftleistung und das Geräusch durch die Abstandhalter 12 selber. Die strömungsprofilartig ausgebildeten Abstandhalter 12 besitzen, wie dies aus Fig. 4 zu erkennen ist, eine Längsachse X und eine Querachse Y, wobei die Längsachse X länger ist als die Querachse Y. Die strömungsprofilförmigen Abstandhalter 12 sind dabei derart angeordnet, dass sie mit ihrer abgerundeten Vorderseite entgegen der Drehrichtung Z ausgerichtet sind. Für eine Optimierung des Strömungsverhaltens der Abstandhalter 12 kann es zweckmäßig sein, wenn deren Längsachse X unter einem spitzen Anstellwinkel α vorzugsweise von - 10 ° ≤ α ≤ 60 ° zu einer Tangente T verlaufen, die an dem kreisförmigen Umfang des Radiallüfterrades 1 angelegt ist, bzw. zu der zur Tangente T parallel verlaufenden Geraden P. Eine weitere erfindungsgemäße Optimierung besteht darin, den Strebenabstand A der Abstandhalter vom Mittelpunkt bzw. der Mittelachse M des Radiallüfterrades 1 zu optimieren, wobei vorzugsweise der Strebenabstand A derart bemessen ist, dass gilt: 1,05 x R ≤ A ≤ 1,5 R, wobei R der Radius des Radiallüfterrades 1 ist.As can be seen in particular Fig. 4 results, it is advantageous if the web-shaped spacers 12 have the shape of flow profiles. These are expediently wing profiles that are optimized aerodynamically and aeroacoustically. By avoiding air separations or vortices on the spacer profiles, there are thus no negative effects on the air power and the noise due to the spacers 12 themselves. The flow-profile-like spacers 12 have, as is the case Fig. 4 can be seen, a longitudinal axis X and a transverse axis Y, wherein the longitudinal axis X is longer than the transverse axis Y. The flow-profile-shaped spacers 12 are arranged such that they are aligned with its rounded front against the direction of rotation Z. For an optimization of the flow behavior of the spacers 12, it may be expedient if the longitudinal axis X thereof runs at an acute angle α preferably from -10 ° ≤ α ≤ 60 ° to a tangent T which is applied to the circular circumference of the radial fan wheel 1, or to the straight line P running parallel to the tangent T. A further optimization according to the invention consists of the distance A of the spacers from the center point or the center axis M of the radial fan wheel 1 Optimize, wherein preferably the strut distance A is such that 1.05 x R ≤ A ≤ 1.5 R, where R is the radius of the radial fan wheel 1.

Wie weiterhin aus Fig. 1 zu erkennen ist, kann die Lufteinlassöffnung 9 der Frontplatte 8 mit einem Schutzgitter 32 verschlossen werden. Hierzu wird das Schutzgitter 32, das insbesondere als Kunststoffspritzgussteil ausgebildet ist, mittels einer Klipsverbindung mit der Frontplatte 8 verrastet. Es ist jedoch auch eine einteilige Ausbildung mit der Frontplatte 8 möglich. Die Frontplatte 8 ist vorzugsweise derart dimensioniert, dass sie die Motorhalterung 11 an ihrem Außenrand umfänglich überragt. Hierdurch kann der Kompaktlüfter durch eine Durchstecköffnung in einer den Kompaktlüfter aufnehmenden Wand oder einem Gehäuse soweit eingesteckt werden, bis die Frontplatte 8 an der den Kompaktlüfter aufnehmenden Wand anliegt und die Durchstecköffnung hierdurch abgedeckt wird. Mittels der Frontplatte 8 kann der Kompaktlüfter schraubgemäß befestigt werden. Die Frontplatte 8 und die Motorhalterung 11 haben vorzugsweise eine quadratische Form, wobei die Ecken 30, 35 jeweils abgeschrägt sind.How to continue Fig. 1 can be seen, the air inlet opening 9 of the front panel 8 can be closed with a protective grid 32. For this purpose, the protective grid 32, which is designed in particular as a plastic injection-molded part, by means of a clip connection with the front panel 8 is locked. However, it is also a one-piece design with the front panel 8 possible. The front panel 8 is preferably dimensioned such that it projects beyond the motor mount 11 at its outer edge. As a result, the compact fan can be plugged through a through opening in a compact fan receiving wall or a housing until the front panel 8 rests against the compact fan receiving wall and the insertion opening is thereby covered. By means of the front panel 8, the compact fan can be secured according to the screw. The front plate 8 and the motor mount 11 preferably have a square shape, with the corners 30, 35 each being chamfered.

In Fig. 5 ist eine alternative Ausführungsform eines Kompaktlüfters zu den Fig. 1 bis 4 dargestellt. Hierbei besteht die Zwischenhalterung aus der mittleren Haltescheibe 19 und an dieser angeformten Speichenstegen 21. Es sind vier umfangsgemäß gleichförmig verteilte Speichenstege 21 vorhanden, die bei diesem Ausführungsbeispiel bogenförmig geformt sind. Die Speichenstege 21 sind unmittelbar mit dem Randsteg 18 der Motorhalterung 11 verbindbar, so dass bei dieser Ausführungsform kein Ringsteg vorhanden ist. Im dargestellten Ausführungsbeispiel sind die Abstandhalter 12 als strömungsgünstige, im Querschnitt bogenförmige Streben ausgebildet. Dabei ist die Bogenform derart gewählt, dass sich eine zum Inneren des Kompaktlüfters konvexe Kontur der bogenförmigen Streben ergibt. Die Abstandhalter 12 verlaufen schräg zur Frontplatte 8 und zum Randsteg 18 und beginnen bzw. enden jeweils in den Ecken 30 und 35. Weiterhin ist zu erkennen, dass ein Klemmenkasten 40 teilweise im Zwischenraum zwischen dem Radiallüfterrad 1 und der Frontplatte 8 vorhanden ist. An Stelle eines Klemmenkastens 40 für den elektrischen Anschluss kann auch nur ein einfacher Kabelanschluss vorgesehen sein.In Fig. 5 is an alternative embodiment of a compact fan to the Fig. 1 to 4 shown. Here, the intermediate holder consists of the middle holding plate 19 and formed on this spoke webs 21. There are four circumferentially uniformly distributed spoke webs 21 which are arcuately shaped in this embodiment. The spoke webs 21 are directly connected to the edge web 18 of the motor mount 11, so that in this embodiment, no annular web is present. In the illustrated embodiment, the spacers 12 are formed as streamlined, arcuate cross-section struts. In this case, the arc shape is selected such that there is a convex to the interior of the compact fan contour of the arcuate struts. The spacers 12 extend obliquely to the front plate 8 and the edge web 18 and start and end respectively in the corners 30 and 35. Furthermore, it can be seen that a terminal box 40 is partially present in the space between the radial fan 1 and the front panel 8. Instead of a terminal box 40 for the electrical connection, only a simple cable connection can be provided.

In den Fig. 6 bis 8 ist eine Ausführungsform eines erfindungsgemäßen Kompaktlüfters dargestellt. Bei dieser Ausführungsform ist die Frontplatte 8, die Motorhalterung 11 und die Abstandhalter 12 aus zwei miteinander im Bereich der Abstandhalter 12 verbindbaren Kunststoff- oder Metallspritzgussteilen gebildet. Demnach entfällt bei dieser Ausführungsform eine Zwischenhalterung wie bei den Ausführungsformen gemäß Fig. 1 bis 5. Die Motorhalterung 11 besteht aus einer mittigen Haltescheibe 19 für die Befestigung des Statorflansches 16 eines Außenläufermotors 2. Von dieser mittigen Haltescheibe 19 aus verlaufen etwa radiale Speichenstege 21 nach außen, die in einem umfänglich geschlossenen Randsteg 37 enden. Somit bilden der Randsteg 37, die Speichenstege 21 sowie die mittlere Haltescheibe 19 die Motorhalterung 11. Im dargestellten Ausführungsbeispiel weist sowohl die Frontplatte 8 als auch die Motorhalterung 11 an ihren einander zugekehrten Seiten jeweils Teilstücke 38, 39 der Abstandhalter 12 auf. Diese Teilstücke 38, 39 können gleich lang oder unterschiedlich lang sein . Die Montage des erfindungsgemäßen Kompaktlüfters erfolgt hierbei derart, dass zunächst das Radiallüfterrad 1 mit dem Außenläufermotor 2 auf der Motorhalterung 11 schraubgemäß befestigt wird, und zwar auf der der Frontplatte 8 zugekehrten Seite der Motorhalterung 11. Danach wird die Motorhalterung 11 mit der Frontplatte im Bereich der aneinanderstoßenden Teilstücke 38, 39 der Abstandhalter 12 verbunden, indem beispielsweise Befestigungsschrauben durch die Teilstücke 39, 39 eingeschraubt werden. Dies geschieht vorzugsweise von der Rückseite der Motorhalterung 11 aus. Die Zwischenmontagestellung, wobei das Radiallüfterrad 1 mit der Motorhalterung 11 verbunden ist, ist in Fig. 7 dargestellt. Fig. 8 zeigt den Fertigstellungszustand des erfindungsgemäßen Kompaktlüfters. Um eine sichere Verbindung der Teilstücke 38, 39 zu erreichen, ist es zweckmäßig, wenn diese an ihren Stoßstellen derart geformt sind, dass sie ineinandergreifen. Bei der in den Fig. 6 bis 8 dargestellten Ausführungsform sind die Frontplatte 8 und die Motorhalterung 11 insbesondere als Kunststoff-Spritzgussteile gefertigt. Das Schutzgitter 32 kann aufklipsbar sein oder auch einstückig mit der Frontplatte 8 ausgebildet sein. In diesem dargestellten Ausführungsbeispiel haben die Frontplatte 8 und die Motorhalterung 11, insbesondere deren Randsteg 18, auch eine etwa quadratische Umfangskontur, wobei die Ecken des Quadrates jeweils abgeschrägt sind. Jedoch ist die Erfindung auf eine derartige Ausgestaltung der Frontplatte 8 und der Motorhalterung 11 nicht beschränkt. Sowohl die Frontplatte 8 als auch die Motorhalterung 11 können durch Verrippungen 34, 35 versteift werden.In the Fig. 6 to 8 an embodiment of a compact ventilator according to the invention is shown. In this embodiment, the front panel 8, the motor mount 11 and the spacers 12 of two in the Area of the spacers 12 connectable plastic or metal injection molded parts formed. Accordingly, in this embodiment eliminates an intermediate support as in the embodiments according to Fig. 1 to 5 , The motor mount 11 consists of a central retaining disk 19 for attachment of the stator flange 16 of an external rotor motor 2. From this central retaining disk 19 extend approximately radial spoke webs 21 outward, which terminate in a peripherally closed edge web 37. Thus, the edge web 37, the spoke webs 21 and the middle retaining plate 19, the motor mount 11. In the illustrated embodiment, both the front plate 8 and the motor mount 11 on their sides facing each other sections 38, 39 of the spacer 12. These sections 38, 39 may be the same length or different lengths. The assembly of the compact fan according to the invention is in this case such that initially the radial fan 1 with the external rotor motor 2 is secured schraubgemäß on the motor mount 11, on the front panel 8 facing side of the motor mount 11. Thereafter, the motor mount 11 with the front panel in the abutting portions 38, 39 of the spacers 12 connected by, for example, fastening screws are screwed through the sections 39, 39. This is preferably done from the back of the motor mount 11. The intermediate mounting position with the radial fan 1 connected to the engine mount 11 is in FIG Fig. 7 shown. Fig. 8 shows the completion state of the compact fan according to the invention. In order to achieve a secure connection of the sections 38, 39, it is expedient if these are formed at their joints in such a way that they intermesh. In the in the Fig. 6 to 8 illustrated embodiment, the front panel 8 and the motor mount 11 are made in particular as plastic injection molded parts. The protective grid 32 can be clipped on or can also be formed in one piece with the front panel 8. In this illustrated embodiment, the front plate 8 and the motor mount 11, in particular its edge web 18, also have an approximately square peripheral contour, wherein the corners of the square are each bevelled. However, the invention is not limited to such a configuration of the front panel 8 and the motor mount 11. Both the front plate 8 and the motor mount 11 can be stiffened by ribs 34, 35.

Claims (13)

  1. A compact fan, consisting of a radial fan impeller (1) which is fastened to a rotor of an external-rotor motor (2), and which is mounted between a front plate (8) with an in particular central air inlet opening (9) and a motor holding means (11) and the front plate (8) and the motor holding means (11) are connected together by a plurality of peripherally arranged spacers (12), the front plate (8), the motor holding means (11) and the spacers (12) being formed as two plastics-material or metal injection-moulded parts which can be connected together via the spacers (12),
    characterised in that the spacers (12) are formed partially in one piece with the front plate (8) and the motor holding means (11), by the spacers consisting of sections (38, 39) connected to the front plate (8) and the motor holding means (11), and the spacers (12) extending perpendicularly or obliquely to the front plate (8) and the motor holding means (11) and being formed as flow profiles.
  2. A compact fan according to Claim 1, characterised in that the motor holding means (11) has a central holding disc (19) for fastening the stator flange (16), from which disc approximately radially extending spoke lands (21) protrude outwards, which end in a peripherally closed edge land (37).
  3. A compact fan according to Claim 2, characterised in that at least one of the spoke lands (21) is formed U-shaped in cross-section as a channel which is open on one side.
  4. A compact fan according to one of Claims 1 to 3, characterised in that the spacers (12) have a longitudinal axis (X) and a transverse axis (Y) extending perpendicular thereto, the longitudinal axis (X) being longer than the transverse axis (Y), and are formed as wing profiles and have a front side which is rounded off oriented counter to a direction of rotation (Z).
  5. A compact fan according to Claim 4, characterised in that the longitudinal axis (X) extends parallel or at an acute angle (α) of -10°≤ α≤ +60° to a tangent (T) to a circular peripheral line of the radial fan impeller (1).
  6. A compact fan according to Claim 4 or 5, characterised in that a radial distance (A) of the spacers (12) from a centre line (M) of the radial fan impeller (1) is selected dependent on the external radius (R) of the radial fan impeller (1) corresponding to the measurement rule 1.05 R ≤ A ≤ 1.5 R.
  7. A compact fan according to one of Claims 3 to 6, characterised in that the air inlet opening (9) of the front plate (8) is circular and has an inner edge region (14) formed as an inflow nozzle.
  8. A compact fan according to one of Claims 1 to 7, characterised in that the air inlet opening (19) can be closed with a protective grating (32) which can be fastened to or is formed on the front plate (8).
  9. A compact fan according to one of Claims 1 to 8, characterised in that the front plate (8) projects over the periphery of the motor holding means (11) on its outer edge, and also both parts (8, 11) preferably have a square shape with chamfered corners (30, 35).
  10. A compact fan according to Claims 7, 8 or 9, characterised in that the radial fan impeller (1) consists of a front cover disc (3) and a rear cover disc (4), between which backwards-curved blades (6) are arranged, and the front cover disc (3) has a circular air inlet opening (7), the diameter of which is somewhat greater than the external diameter of the inflow nozzle (14).
  11. A compact fan according to one of Claims 1 to 10, characterised in that the radial fan impeller (1) is pressed on to the rotor of the external-rotor motor (2).
  12. A compact fan according to one of Claims 1 to 11, characterised in that the front plate (8) and the motor holding means (11) are reinforced by rib structures (33, 34).
  13. A compact fan according to one of Claims 1 to 12, characterised in that the sections (38, 30) are formed at their joints such that they engage in one another.
EP09712411A 2008-02-19 2009-01-30 Compact fan Active EP2242930B1 (en)

Applications Claiming Priority (2)

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DE202008002356U DE202008002356U1 (en) 2008-02-19 2008-02-19 compact fans
PCT/EP2009/051069 WO2009103606A1 (en) 2008-02-19 2009-01-30 Compact fan

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EP2242930A1 EP2242930A1 (en) 2010-10-27
EP2242930B1 true EP2242930B1 (en) 2012-03-07

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EP (1) EP2242930B1 (en)
CN (1) CN101946092B (en)
AT (1) ATE548568T1 (en)
DE (2) DE202008002356U1 (en)
ES (1) ES2382438T4 (en)
WO (1) WO2009103606A1 (en)

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US20110200438A1 (en) 2011-08-18
CN101946092A (en) 2011-01-12
DE102008056459A1 (en) 2009-08-20
ES2382438T3 (en) 2012-06-08
DE202008002356U1 (en) 2009-06-25
US8672615B2 (en) 2014-03-18
US20100329857A1 (en) 2010-12-30
CN101946092B (en) 2015-07-01
US8992175B2 (en) 2015-03-31
EP2242930A1 (en) 2010-10-27
WO2009103606A1 (en) 2009-08-27
ATE548568T1 (en) 2012-03-15
ES2382438T4 (en) 2012-10-10

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