EP2410187A1 - Protective guard assembly for ventilator - Google Patents

Protective guard assembly for ventilator Download PDF

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Publication number
EP2410187A1
EP2410187A1 EP11170176A EP11170176A EP2410187A1 EP 2410187 A1 EP2410187 A1 EP 2410187A1 EP 11170176 A EP11170176 A EP 11170176A EP 11170176 A EP11170176 A EP 11170176A EP 2410187 A1 EP2410187 A1 EP 2410187A1
Authority
EP
European Patent Office
Prior art keywords
protective grid
locking
latching
protective
arrangement 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.)
Granted
Application number
EP11170176A
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German (de)
French (fr)
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EP2410187B1 (en
Inventor
Thomas Heli
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
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Ebm Papst Mulfingen GmbH and Co KG
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Publication of EP2410187A1 publication Critical patent/EP2410187A1/en
Application granted granted Critical
Publication of EP2410187B1 publication Critical patent/EP2410187B1/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
    • F04D29/70—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
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
    • F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
    • F04D29/646—Mounting or removal of fans

Definitions

  • the present invention relates according to the preamble of claim 1, a protective grid assembly for a fan, consisting of a rotating fan before or nachordnenden cover with an air passage opening and a closing in the region of the passage opening for contact protection with the cover over several the grid arranged distributed latching connections connected or connectable protective grid, each latching connection consists of a fixedly arranged in the passage opening and a latching arranged on the protective grid latching element.
  • the publication DE 20 2008 002 356 U1 describes various embodiments of a compact fan with a protective grid arrangement of the generic type described above.
  • the known compact fan has as a cover to a front panel with an air inlet opening, which is covered with a protective grid to protect against contact with the rotating fan parts or covered.
  • the protective grid can be locked by means of a clip connection with the front panel.
  • the protective grid in a first embodiment on its outer edge axially projecting locking elements which can be latched with locking lugs of the front panel.
  • the guard meshes only with the protruding locking elements something in the opening area, so that the grid itself protrudes significantly above the opening plane.
  • the attachment is solely dependent on the spring elasticity of the axially projecting locking elements.
  • the protective grid in another embodiment may also be integrally formed with the front panel and then also lie approximately in the opening plane.
  • the present invention is based on the object to improve a protective grid arrangement of the type described so that a safe and in particular play-free snap-fastening of the protective grid is ensured in the passage opening of the cover without protrusion of the protective grid.
  • the protective grid should be easy and quick to install and in particular also be solvable.
  • the invention provides that the locking elements are arranged on the outer edge of the protective grid in the lattice plane, wherein the protective grid in the region of each locking element is formed elastically deformable such that each locking element for locking and releasing the locking connection under regionally elastic deformation of the protective grid radially relative to the associated locking projection is movable.
  • this allows the protective grid to be inserted axially into the mouth region of the passage opening, wherein the axial insertion movement, the individual locking connections can be locked by axial, manual pressing, with the locking elements each in their entirety and without their own elastic deformation only under deformation of the adjacent protective grid Move radially radially and then engage the locking lugs form-locking detent radially outward.
  • a loosening of the locking connections is advantageously possible with the reverse direction of movement by manually in the region of each locking element, a radially inwardly acting release force is applied by the locking element to release the positive locking connection can move radially inward. In this way, the individual latching connections can be successively solved until the entire protective grid is released.
  • the invention achieves important advantages, in particular a very good and secure support by a correspondingly high radial spring force in the region of individual locking elements, wherein the height of this spring force can be specified by the material and shape-dependent deformation properties of the protective grid. Due to the recessed arrangement of the protective grid in the mouth region of the passage opening in combination with the configuration of the snap connections flow-favorable properties are also achieved, but in particular for applications without protective grid, because the passage opening is designed almost without protruding parts.
  • the protective grid seen in the circumferential direction between each two adjacent locking elements on a radial support portion with an end-side contact contour for radial and axial contact on an opening edge of the passage opening of the cover.
  • the support sections are axially and radially free of play with an elastic contact force on the opening edge of the passage opening.
  • This elastic contact force is also effected by a partially elastic deformation of the protective grid itself by the support sections first come into contact with the insertion of the protective grid, and only after further impressions under elastic deformation of the protective grid is the locking of the locking elements with the associated locking lugs.
  • a backlash is achieved by elastic bias, which disturbing noise (vibrations) can be avoided during operation.
  • a protective grid arrangement according to the invention 1 consists of a cover 2 with a particular circular air passage opening 4.
  • the cover 2 is preceded by a rotating fan, not shown, wherein the passage opening 4 forms an air inlet for the air sucked by the fan.
  • the cover 2 are also arranged downstream of a fan, wherein the passage opening 4 would form a blowout.
  • the impeller not shown, can be designed as axial fan, radial fan or diagonal fan.
  • a protective grid 6 can be fastened to the cover part 2 in the region of the passage opening 4.
  • a plurality of, in particular at least three circumferentially spaced latching connections 8 are provided.
  • Each of these latching connections 8 consists of a latching lug 10 fixedly arranged in the region of the passage opening 4 and a latching element 12 arranged on the protective lattice 6.
  • the locking elements 12 do not protrude axially from the protective grid 6, but are practically arranged on the outer edge of the protective grid 6 in the lattice plane.
  • the term "lattice plane” does not mean that the entire protective grid 6 must lie exactly in one plane, but rather the protective grid 6 can also be a lattice shape curved overall slightly convexly outwards. It is only essential that the locking elements 12 are arranged facing away from the outer edge of the protective grid 6 only radially outward.
  • the protective grid 6 is formed so resiliently deformable at least in the region of each locking element 12, that each locking element 12 for locking or releasing the locking connection 8 under regional elastic deformation of the protective grid 6, but without its own elastic deformation, radially relative to the associated locking projection 10 is movable. This radial movement is in Fig. 2 and 3 each illustrated by a double arrow 14.
  • the preferably circular passage opening 4 of the cover part 2 is preferably formed with an opening edge 16 which narrows in a nozzle-like manner from an outer side to an inner side facing the fan wheel.
  • This opening edge 16 has, in particular, a surface that is convexly curved in longitudinal section. Alternatively, it could also be a cone-shaped inclined surface.
  • the locking lugs 10 are arranged in the tapered region of the opening edge 16. As a result, the protective grid 6 can be supported not only radially but also axially on the opening edge 16.
  • each locking element 12 has a radially outwardly projecting, fork-like end portion 18 which engages around the associated locking projection 10 of the cover 2 in the circumferential direction on both sides.
  • each latching element 12 has a surface contour of the opening edge 16 of the passage opening 4 adapted support contour 20 such that the end portion 18 can be supported on its support contour 20 radially and axially on the opening edge 16.
  • a radial support section 22 is arranged in each case between two adjacent latching elements 12 for the play-free support of the protective grid 6, wherein each support section 22 has an end-side contact contour 24 for radial and axial abutment on the opening edge 16 of the passage opening 4.
  • the support portions 22 are arranged relative to the locking elements 12 such that in the latched state of the protective grid 6, the support portions 22 axially and radially rest with no play on the opening edge 16 with an elastic contact force. This contact force is generated by slight regional deformation (axial deflection) of the protective grid 6.
  • the protective grid 6 in adaptation to the circular passage opening 4 of a central, in particular circular disk-shaped central portion 26 and a plurality of concentric, each spaced over radial safety distances circular or annular protective struts 28.
  • the protective grid 6 has, in the region of each latching element 12, a radially inwardly extending latching strut 30 which ends at one of the protective struts 28 spaced radially from the middle section 26.
  • each locking strut 30 does not extend to the central portion 26, so that with a certain radial force, a radial deformation of the connected to or via the locking strut 30 protective strut (s) is possible.
  • the height of the required radial force - except for the material and / or shape-dependent spring elasticity of the individual protection struts 28 of the protective grid 6 - also depends on the number of with the respective locking strut 30 connected protection struts 28 from.
  • each locking element 12 is connected via the locking strut 30 with five protection struts 28, so that the radial spring force is generated in common by the deformation of the five struts 28.
  • the amount of radial spring force on the number of involved in the elastic deformation protection struts 28 can be specified.
  • each locking element 12 and the associated locking projection 10 cooperate when joining the connection on non-designated inclined surfaces, that during locking by an axial joining movement automatically elastic radial movement of each locking element 12 is effected under regionally elastic deformation of the protective grid 6. In the latched state, a positive locking is then achieved in the axial direction, because a so-called undercut angle between locking surfaces of locking lug 10 and locking element 12 is greater than / equal to 90 °.
  • each support portion 22 is formed by a free, radially projecting end of a radially inwardly extending continuously to the central portion 26 supporting strut 32 of the protective grid 6.
  • a high radial stability of the protective grid 6 is achieved, in particular in the case of an even number of support sections 22 and support struts 32 with radially symmetric distribution, because then two support struts 32 are diametrically opposite each other on a common diameter line, so that in the direction of this diameter line almost no elastic deformation in the radial direction is possible.
  • the protective grid 6 may be formed as a one-piece molded part made of plastic.
  • the protective grid 6 may also consist at least partially of metal, in particular of a metal wire.
  • the cover 2 is preferably formed as a plastic molded part, wherein the locking lugs 10 are integrally formed.
  • the cover 2 as in Fig. 1 to 3 recognizable - overall annular with a likewise circular outer contour (eg as a so-called "wall ring") or as a housing / wall part with any, eg rectangular or square outer contour with optionally rounded or bevelled corners (eg as "Frontpiatte”) may be formed.
  • the protective grid 6 has at least three, in particular as shown, four locking elements 12 in a radially symmetrical circumferential distribution. This also applies accordingly to the number and arrangement of the locking struts 30, the support sections 22 and the support struts 32nd
  • the number of circular or annular protection struts 28 is dependent on the size of the passage opening 4 to be covered and the maximum safety distances between the adjacent protection struts 28.
  • seven protection struts 28 are provided concentrically around the central central part 26 around, each locking element 12 is connected via the associated locking strut 30 with the five outer protection struts 28. Deviating from this preferred embodiment but also any other embodiments are possible.
  • the invention is not limited to the embodiment described, but also includes all the same in the context of the invention embodiments. It is expressly emphasized that the exemplary embodiments are not limited to all the features in combination, but rather each individual partial feature may also have an inventive meaning independently of all other partial features. Furthermore, the invention has hitherto not been limited to the feature combination defined in claim 1, but may also be defined by any other combination of specific features of all individually disclosed individual features. This means that in principle virtually every single feature of claim 1 omitted or by at least one to another Site of the application disclosed individual feature can be replaced. In this respect, the claim 1 is to be understood only as a first formulation attempt for an invention.

Abstract

The protective grid arrangement has detent elements (12) arranged at an outer edge of a protective grid (6) in its grid plane. The protective grid is formed within an area of each detent element in such a manner that each detent element is moved for locking and releasing of a detent connection (8) under area-wise flexible deformation of the protective grid radially relative to associated detent extension (10).

Description

Die vorliegende Erfindung betrifft gemäß dem Oberbegriff des Anspruchs 1 eine Schutzgitter-Anordnung für einen Lüfter, bestehend aus einem einem rotierenden Lüfterrad vor- oder nachzuordnenden Abdeckteil mit einer Luft-Durchlassöffnung und einem im Bereich der Durchlassöffnung diese zum Berührungsschutz verschließend mit dem Abdeckteil über mehrere über den Umfang verteilt angeordnete Rastverbindungen verbundenen oder verbindbaren Schutzgitter, wobei jede Rastverbindung aus einem fest in der Durchlassöffnung angeordneten Rastansatz und einem an dem Schutzgitter angeordneten Rastelement besteht.The present invention relates according to the preamble of claim 1, a protective grid assembly for a fan, consisting of a rotating fan before or nachordnenden cover with an air passage opening and a closing in the region of the passage opening for contact protection with the cover over several the grid arranged distributed latching connections connected or connectable protective grid, each latching connection consists of a fixedly arranged in the passage opening and a latching arranged on the protective grid latching element.

Die Veröffentlichung DE 20 2008 002 356 U1 beschreibt verschiedene Ausführungen eines Kompaktlüfters mit einer Schutzgitter-Anordnung der oben beschriebenen, gattungsgemäßen Art. Der bekannte Kompaktlüfter weist als Abdeckteil eine Frontplatte mit einer Lufteinlassöffnung auf, die mit einem Schutzgitter zum Schutz gegen Berührungen der rotierenden Lüfterteile abgedeckt ist oder abgedeckt werden kann. Dabei kann das Schutzgitter mittels einer Klipsverbindung mit der Frontplatte verrastet werden. Dazu weist das Schutzgitter in einer ersten Ausführung an seinem Außenrand axial vorstehende Rastelemente auf, die mit Rastansätzen der Frontplatte verrastbar sind. Das Schutzgitter greift nur mit den vorstehenden Rastelementen etwas in den Öffnungsbereich ein, so dass das Gitter selbst deutlich über die Öffnungsebene vorsteht. Dabei ist die Befestigung allein abhängig von der Federelastizität der axial vorstehenden Rastelemente. Alternativ zu dieser verrastbaren Ausführung kann das Schutzgitter in einer anderen Ausführung auch einstückig mit der Frontplatte ausgebildet sein und dann auch etwa in der Öffnungsebene liegen.The publication DE 20 2008 002 356 U1 describes various embodiments of a compact fan with a protective grid arrangement of the generic type described above. The known compact fan has as a cover to a front panel with an air inlet opening, which is covered with a protective grid to protect against contact with the rotating fan parts or covered. In this case, the protective grid can be locked by means of a clip connection with the front panel. For this purpose, the protective grid in a first embodiment on its outer edge axially projecting locking elements which can be latched with locking lugs of the front panel. The guard meshes only with the protruding locking elements something in the opening area, so that the grid itself protrudes significantly above the opening plane. The attachment is solely dependent on the spring elasticity of the axially projecting locking elements. As an alternative to this latchable embodiment, the protective grid in another embodiment may also be integrally formed with the front panel and then also lie approximately in the opening plane.

Der vorliegenden Erfindung liegt die Aufgabe zu Grunde, eine Schutzgitter-Anordnung der beschriebenen Art so zu verbessern, dass ohne Überstand des Schutzgitters eine sichere und insbesondere auch spielfreie Rastbefestigung des Schutzgitters in der Durchlassöffnung des Abdeckteils gewährleistet ist. Das Schutzgitter soll einfach und schnell montierbar und insbesondere auch lösbar sein.The present invention is based on the object to improve a protective grid arrangement of the type described so that a safe and in particular play-free snap-fastening of the protective grid is ensured in the passage opening of the cover without protrusion of the protective grid. The protective grid should be easy and quick to install and in particular also be solvable.

Erfindungsgemäß wird dies durch die Merkmale des Anspruchs 1 erreicht. Vorteilhafte Ausgestaltungen der Erfindung sind in den abhängigen Ansprüchen sowie der nachfolgenden Beschreibung enthalten.This is achieved by the features of claim 1 according to the invention. Advantageous embodiments of the invention are contained in the dependent claims and the following description.

Demnach ist erfindungsgemäß vorgesehen, dass die Rastelemente am Außenrand des Schutzgitters in dessen Gitterebene angeordnet sind, wobei das Schutzgitter im Bereich jedes Rastelementes derart federelastisch verformbar ausgebildet ist, dass jedes Rastelement zum Verrasten und Lösen der Rastverbindung unter bereichsweiser elastischer Verformung des Schutzgitters radial relativ zu dem zugehörigen Rastansatz bewegbar ist. Vorteilhafterweise kann hierdurch das Schutzgitter axial in den Mündungsbereich der Durchlassöffnung eingesetzt werden, wobei durch die axiale Einsetzbewegung die einzelnen Rastverbindungen durch axialen, manuellen Pressdruck verrastet werden können, wobei sich die Rastelemente jeweils in ihrer Gesamtheit und ohne eigene elastische Verformung nur unter Verformung des angrenzenden Schutzgitter-Bereiches radial bewegen und dann die Rastansätze formschlüssig rastend radial nach außen hintergreifen. Ein Lösen der Rastverbindungen ist vorteilhafterweise mit umgekehrter Bewegungsrichtung möglich, indem im Bereich jedes Rastelementes manuell eine radial nach innen wirkende Lösekraft aufgebracht wird, durch die sich das Rastelement zur Freigabe der formschlüssigen Rastverbindung radial nach innen bewegen lässt. Auf diese Weise können die einzelnen Rastverbindungen nacheinander gelöst werden, bis das gesamte Schutzgitter gelöst ist.Accordingly, the invention provides that the locking elements are arranged on the outer edge of the protective grid in the lattice plane, wherein the protective grid in the region of each locking element is formed elastically deformable such that each locking element for locking and releasing the locking connection under regionally elastic deformation of the protective grid radially relative to the associated locking projection is movable. Advantageously, this allows the protective grid to be inserted axially into the mouth region of the passage opening, wherein the axial insertion movement, the individual locking connections can be locked by axial, manual pressing, with the locking elements each in their entirety and without their own elastic deformation only under deformation of the adjacent protective grid Move radially radially and then engage the locking lugs form-locking detent radially outward. A loosening of the locking connections is advantageously possible with the reverse direction of movement by manually in the region of each locking element, a radially inwardly acting release force is applied by the locking element to release the positive locking connection can move radially inward. In this way, the individual latching connections can be successively solved until the entire protective grid is released.

Durch die Erfindung werden wichtige Vorteile erreicht, insbesondere eine sehr gute und sichere Halterung durch eine entsprechend hohe radiale Federkraft im Bereich der einzelnen Rastelemente, wobei die Höhe dieser Federkraft durch die material- und formabhängigen Verformungseigenschaften des Schutzgitters vorgegeben werden kann. Durch die versenkte Anordnung des Schutzgitters im Mündungsbereich der Durchlassöffnung in Kombination mit der Ausgestaltung der Rastverbindungen werden zudem strömungsgünstige Eigenschaften erreicht, insbesondere aber auch für Anwendungen ohne Schutzgitter, weil die Durchlassöffnung nahezu ohne vorstehende Teile ausgestaltet ist.The invention achieves important advantages, in particular a very good and secure support by a correspondingly high radial spring force in the region of individual locking elements, wherein the height of this spring force can be specified by the material and shape-dependent deformation properties of the protective grid. Due to the recessed arrangement of the protective grid in the mouth region of the passage opening in combination with the configuration of the snap connections flow-favorable properties are also achieved, but in particular for applications without protective grid, because the passage opening is designed almost without protruding parts.

In bevorzugter Ausgestaltung der Erfindung weist das Schutzgitter in Umfangsrichtung gesehen jeweils zwischen zwei benachbarten Rastelementen einen radialen Stützabschnitt mit einer endseitigen Anlagekontur zur radialen und axialen Anlage auf einem Öffnungsrand der Durchlassöffnung des Abdeckteils auf. Vorzugsweise liegen hierbei im verrasteten Zustand des Schutzgitters die Stützabschnitte axial und radial spielfrei mit einer elastischen Anlagekraft auf dem Öffnungsrand der Durchlassöffnung auf. Diese elastische Anlagekraft wird ebenfalls durch eine bereichsweise elastische Verformung des Schutzgitters selbst bewirkt, indem beim Einsetzen des Schutzgitters zunächst die Stützabschnitte zur Anlage gelangen, und erst nach einem weitergehenden Eindrücken unter elastischer Verformung des Schutzgitters erfolgt das Verrasten der Rastelemente mit den zugehörigen Rastansätzen. Dadurch wird eine Spielfreiheit durch elastische Vorspannung erreicht, wodurch im Betrieb auch störende Geräusche (Schwingungen) vermieden werden.In a preferred embodiment of the invention, the protective grid seen in the circumferential direction between each two adjacent locking elements on a radial support portion with an end-side contact contour for radial and axial contact on an opening edge of the passage opening of the cover. Preferably, in the latched state of the protective grid, the support sections are axially and radially free of play with an elastic contact force on the opening edge of the passage opening. This elastic contact force is also effected by a partially elastic deformation of the protective grid itself by the support sections first come into contact with the insertion of the protective grid, and only after further impressions under elastic deformation of the protective grid is the locking of the locking elements with the associated locking lugs. As a result, a backlash is achieved by elastic bias, which disturbing noise (vibrations) can be avoided during operation.

Weitere besondere Ausführungsmerkmale werden in der Beschreibung noch erläutert werden.Other particular features will be explained in the description.

Anhand eines in der Zeichnung veranschaulichten, bevorzugten Ausführungsbeispiels soll die Erfindung genauer erläutert werden. Dabei zeigen:

Fig. 1
eine Perspektivansicht einer erfindungsgemäßen Schutzgitter-Anordnung im verbundenen, verrasteten Zustand der Bestandteile,
Fig. 2
eine entlang der Schnittlinie II-II in Fig. 1 halb geschnittene Perspektivansicht der erfindungsgemäßen Schutzgitter-Anordnung,
Fig. 3
eine Ausschnittvergrößerung des Bereiches III in Fig. 2,
Fig. 4
eine Draufsicht nur des Schutzgitters,
Fig. 5
einen Diagonalschnitt des Schutzgitters in der Ebene V-V gemäß Fig. 4 und
Fig. 6
eine Perspektivansicht des Schutzgitters nach Fig. 4.
Reference to an illustrated in the drawing, preferred embodiment, the invention will be explained in more detail. Showing:
Fig. 1
a perspective view of a protective grid arrangement according to the invention in the connected, locked state of the components,
Fig. 2
one along the section line II-II in Fig. 1 half-cut perspective view of the protective grid arrangement according to the invention,
Fig. 3
a detail enlargement of the area III in Fig. 2 .
Fig. 4
a top view only of the protective grid,
Fig. 5
a diagonal section of the protective grid in the plane VV according to Fig. 4 and
Fig. 6
a perspective view of the protective grid according to Fig. 4 ,

In den verschiedenen Figuren der Zeichnung sind gleiche Teile stets mit den gleichen Bezugszeichen versehen.In the various figures of the drawing, like parts are always provided with the same reference numerals.

Wie sich zunächst aus Fig. 1 bis 3 ergibt, besteht eine erfindungsgemäße Schutzgitter-Anordnung 1 aus einem Abdeckteil 2 mit einer insbesondere kreisförmigen Luft-Durchlassöffnung 4. Das Abdeckteil 2 wird einem nicht dargestellten rotierenden Lüfterrad vorgeordnet, wobei die Durchlassöffnung 4 einen Lufteinlass für die vom Lüfterrad angesaugte Luft bildet. Alternativ kann selbstverständlich das Abdeckteil 2 auch einem Lüfterrad nachgeordnet werden, wobei die Durchlassöffnung 4 eine Ausblasöffnung bilden würde. Das nicht dargestellte Lüfterrad kann als Axiallüfter, Radiallüfter oder auch Diagonallüfter ausgebildet sein.As it turned out first Fig. 1 to 3 results, a protective grid arrangement according to the invention 1 consists of a cover 2 with a particular circular air passage opening 4. The cover 2 is preceded by a rotating fan, not shown, wherein the passage opening 4 forms an air inlet for the air sucked by the fan. Alternatively, of course, the cover 2 are also arranged downstream of a fan, wherein the passage opening 4 would form a blowout. The impeller, not shown, can be designed as axial fan, radial fan or diagonal fan.

Um aus Sicherheitsgründen die Durchlassöffnung 4 zum Schutz vor unbeabsichtigten Berührungen des rotierenden Lüfterrades zu verschließen, kann an dem Abdeckteil 2 im Bereich der Durchlassöffnung 4 ein Schutzgitter 6 befestigt werden. Dazu sind mehrere, und zwar insbesondere mindestens drei über den Umfang verteilt angeordnete Rastverbindungen 8 vorgesehen. Jede dieser Rastverbindungen 8 besteht aus einem fest im Bereich der Durchlassöffnung 4 angeordneten Rastansatz 10 und einem an dem Schutzgitter 6 angeordneten Rastelement 12.In order to close the passage opening 4 for reasons of safety against unintentional contact with the rotating fan wheel, a protective grid 6 can be fastened to the cover part 2 in the region of the passage opening 4. For this purpose, a plurality of, in particular at least three circumferentially spaced latching connections 8 are provided. Each of these latching connections 8 consists of a latching lug 10 fixedly arranged in the region of the passage opening 4 and a latching element 12 arranged on the protective lattice 6.

Erfindungsgemäß ist hierbei vorgesehen, dass die Rastelemente 12 nicht axial vom Schutzgitter 6 vorstehen, sondern praktisch am Außenrand des Schutzgitters 6 in dessen Gitterebene angeordnet sind. Der Begriff "Gitterebene" bedeutet jedoch nicht, dass das gesamte Schutzgitter 6 genau in einer Ebene liegen muss, vielmehr kann es sich bei dem Schutzgitter 6 auch um eine insgesamt leicht konvex nach außen gewölbte Gitterform handeln. Wesentlich ist nur, dass die Rastelemente 12 vom Außenrand des Schutzgitters 6 nur radial nach außen weisend angeordnet sind. Erfindungsgemäß ist hierbei weiterhin vorgesehen, dass das Schutzgitter 6 zumindest im Bereich jedes Rastelementes 12 derart federelastisch verformbar ausgebildet ist, dass jedes Rastelement 12 zum Verrasten oder Lösen der Rastverbindung 8 unter bereichsweiser elastischer Verformung des Schutzgitters 6, jedoch ohne eigene elastische Verformung, radial relativ zu dem zugehörigen Rastansatz 10 bewegbar ist. Diese radiale Bewegung ist in Fig. 2 und 3 jeweils durch einen Doppelpfeil 14 veranschaulicht.According to the invention it is provided that the locking elements 12 do not protrude axially from the protective grid 6, but are practically arranged on the outer edge of the protective grid 6 in the lattice plane. However, the term "lattice plane" does not mean that the entire protective grid 6 must lie exactly in one plane, but rather the protective grid 6 can also be a lattice shape curved overall slightly convexly outwards. It is only essential that the locking elements 12 are arranged facing away from the outer edge of the protective grid 6 only radially outward. According to the invention, it is further provided that the protective grid 6 is formed so resiliently deformable at least in the region of each locking element 12, that each locking element 12 for locking or releasing the locking connection 8 under regional elastic deformation of the protective grid 6, but without its own elastic deformation, radially relative to the associated locking projection 10 is movable. This radial movement is in Fig. 2 and 3 each illustrated by a double arrow 14.

Die bevorzugt kreisförmige Durchlassöffnung 4 des Abdeckteils 2 ist vorzugsweise mit einem sich düsenartig von einer Außenseite zu einer dem Lüfterrad zugewandten Innenseite hin verjüngenden Öffnungsrand 16 ausgebildet. Dieser Öffnungsrand 16 weist insbesondere eine im Längsschnitt konvex gekrümmt verlaufende Oberfläche auf. Alternativ könnte es sich auch um eine konusartige Schrägfläche handeln. Hierbei sind nun die Rastansätze 10 im sich verjüngenden Bereich des Öffnungsrandes 16 angeordnet. Dadurch kann sich das Schutzgitter 6 nicht nur radial, sondern auch axial an dem Öffnungsrand 16 abstützen.The preferably circular passage opening 4 of the cover part 2 is preferably formed with an opening edge 16 which narrows in a nozzle-like manner from an outer side to an inner side facing the fan wheel. This opening edge 16 has, in particular, a surface that is convexly curved in longitudinal section. Alternatively, it could also be a cone-shaped inclined surface. Here, the locking lugs 10 are arranged in the tapered region of the opening edge 16. As a result, the protective grid 6 can be supported not only radially but also axially on the opening edge 16.

Dazu ist einerseits vorgesehen, dass jedes Rastelement 12 einen radial nach außen ragenden, gabelartigen Endabschnitt 18 aufweist, der den zugehörigen Rastansatz 10 des Abdeckteils 2 in Umfangsrichtung beidseitig umgreift. Hierdurch wird eine Sicherung des Schutzgitters 6 gegen Verdrehen um die Öffnungsachse erreicht. Im freien Endbereich des gabelartigen Endabschnittes 18 weist jedes Rastelement 12 eine an die Oberflächenkontur des Öffnungsrandes 16 der Durchlassöffnung 4 angepasste Auflagekontur 20 derart auf, dass sich der Endabschnitt 18 über seine Auflagekontur 20 radial und axial auf dem Öffnungsrand 16 abstützen kann.For this purpose, it is provided on the one hand, that each locking element 12 has a radially outwardly projecting, fork-like end portion 18 which engages around the associated locking projection 10 of the cover 2 in the circumferential direction on both sides. As a result, a backup of the protective grid 6 is achieved against rotation about the opening axis. In the free end region of the fork-like end section 18, each latching element 12 has a surface contour of the opening edge 16 of the passage opening 4 adapted support contour 20 such that the end portion 18 can be supported on its support contour 20 radially and axially on the opening edge 16.

Andererseits ist für die spielfreie Abstützung des Schutzgitters 6 in Umfangsrichtung jeweils zwischen zwei benachbarten Rastelementen 12 ein radialer Stützabschnitt 22 angeordnet, wobei jeder Stützabschnitt 22 eine endseitige Anlagekontur 24 zur radialen und axialen Anlage auf dem Öffnungsrand 16 der Durchlassöffnung 4 aufweist. Vorzugsweise sind hierbei die Stützabschnitte 22 relativ zu den Rastelementen 12 derart angeordnet, dass im verrasteten Zustand des Schutzgitters 6 die Stützabschnitte 22 axial und radial spielfrei mit einer elastischen Anlagekraft auf dem Öffnungsrand 16 aufliegen. Diese Anlagekraft wird durch geringfügige bereichsweise Verformung (axiale Durchbiegung) des Schutzgitters 6 erzeugt. Für die Anlage der Stützabschnitte 22 sind im Bereich des Öffnungsrandes 16 vorteilhafterweise keine zusätzlichen, vorstehenden Elemente vorgesehen, vielmehr ist der Öffnungsrand 16 in diesen Bereichen zur direkten Anlage der Stützabschnitte 22 glattflächig und dadurch - für Anwendungen des Abdeckteils 2 ohne das Schutzgitter 6 - strömungsgünstig ausgebildet.On the other hand, a radial support section 22 is arranged in each case between two adjacent latching elements 12 for the play-free support of the protective grid 6, wherein each support section 22 has an end-side contact contour 24 for radial and axial abutment on the opening edge 16 of the passage opening 4. Preferably, in this case the support portions 22 are arranged relative to the locking elements 12 such that in the latched state of the protective grid 6, the support portions 22 axially and radially rest with no play on the opening edge 16 with an elastic contact force. This contact force is generated by slight regional deformation (axial deflection) of the protective grid 6. For the installation of the support portions 22 advantageously no additional, protruding elements are provided in the region of the opening edge 16, but the opening edge 16 in these areas for direct contact of the support portions 22 smooth surface and thus - for applications of the cover 2 without the protective grid 6 - aerodynamically designed ,

In weiterer zweckmäßiger Ausgestaltung besteht das Schutzgitter 6 in Anpassung an die kreisförmige Durchlassöffnung 4 aus einem zentrischen, insbesondere kreisscheibenförmigen Mittelteil 26 und mehreren konzentrischen, jeweils über radiale Sicherheitsabstände beabstandeten kreisförmigen bzw. kreisringförmigen Schutzstreben 28. Alternativ zu dem kreisscheibenförmigen Mittelteil 26 kann dieses auch ringförmig ausgebildet sein. Das Schutzgitter 6 weist im Bereich jedes Rastelementes 12 eine radial nach innen verlaufende Raststrebe 30 auf, die an einer der radial von dem Mittelteil 26 beabstandeten Schutzstreben 28 endet. Demnach verläuft jede Raststrebe 30 nicht bis zu dem Mittelteil 26, so dass mit einer bestimmten Radialkraft eine radiale Verformung der mit der bzw. über die Raststrebe 30 verbundenen Schutzstrebe(n) möglich ist. Hierbei hängt die Höhe der erforderlichen Radialkraft - außer von der material- und/oder formabhängigen Federelastizität der einzelnen Schutzstreben 28 des Schutzgitters 6 - auch von der Anzahl der mit der jeweiligen Raststrebe 30 verbundenen Schutzstreben 28 ab. Bei dem dargestellten, bevorzugten Ausführungsbeispiel ist jedes Rastelement 12 über die Raststrebe 30 mit fünf Schutzstreben 28 verbunden, so dass die radiale Federkraft bei Verformung gemeinsam von den fünf Schutzstreben 28 erzeugt wird. Somit kann die Höhe der radialen Federkraft über die Anzahl der an der elastischen Verformung beteiligten Schutzstreben 28 vorgegeben werden.In a further expedient embodiment, the protective grid 6 in adaptation to the circular passage opening 4 of a central, in particular circular disk-shaped central portion 26 and a plurality of concentric, each spaced over radial safety distances circular or annular protective struts 28. Alternatively to the circular disk-shaped central portion 26, this may also be annular be. The protective grid 6 has, in the region of each latching element 12, a radially inwardly extending latching strut 30 which ends at one of the protective struts 28 spaced radially from the middle section 26. Accordingly, each locking strut 30 does not extend to the central portion 26, so that with a certain radial force, a radial deformation of the connected to or via the locking strut 30 protective strut (s) is possible. Here, the height of the required radial force - except for the material and / or shape-dependent spring elasticity of the individual protection struts 28 of the protective grid 6 - also depends on the number of with the respective locking strut 30 connected protection struts 28 from. In the illustrated preferred embodiment, each locking element 12 is connected via the locking strut 30 with five protection struts 28, so that the radial spring force is generated in common by the deformation of the five struts 28. Thus, the amount of radial spring force on the number of involved in the elastic deformation protection struts 28 can be specified.

Es sei noch erwähnt, dass jedes Rastelement 12 und der zugehörige Rastansatz 10 beim Fügen der Verbindung derart über nicht bezeichnete Schrägflächen zusammenwirken, dass beim Verrasten durch eine axiale Fügebewegung selbsttätig eine elastische Radialbewegung jedes Rastelementes 12 unter bereichsweiser elastischer Verformung des Schutzgitters 6 bewirkt wird. Im verrasteten Zustand wird dann in axialer Richtung ein Formschluss erreicht, weil ein so genannter Hinterschneidungswinkel zwischen Rastflächen von Rastansatz 10 und Rastelement 12 größer/gleich 90° ist.It should be noted that each locking element 12 and the associated locking projection 10 cooperate when joining the connection on non-designated inclined surfaces, that during locking by an axial joining movement automatically elastic radial movement of each locking element 12 is effected under regionally elastic deformation of the protective grid 6. In the latched state, a positive locking is then achieved in the axial direction, because a so-called undercut angle between locking surfaces of locking lug 10 and locking element 12 is greater than / equal to 90 °.

In weiterer bevorzugter Ausgestaltung ist jeder Stützabschnitt 22 von einem freien, radial vorstehenden Ende einer radial nach innen durchgehend bis zu dem Mittelteil 26 verlaufenden Tragstrebe 32 des Schutzgitters 6 gebildet. Hierdurch wird eine hohe radiale Stabilität des Schutzgitters 6 erreicht, und zwar insbesondere im Falle einer geradzahligen Anzahl von Stützabschnitten 22 und Tragstreben 32 bei radialsymmetrischer Verteilung, weil dann je zwei Tragstreben 32 diametral gegenüberliegend auf einer gemeinsamen Durchmesserlinie liegen, so dass in Richtung dieser Durchmesserlinie nahezu keine elastische Verformung in radialer Richtung möglich ist.In a further preferred embodiment, each support portion 22 is formed by a free, radially projecting end of a radially inwardly extending continuously to the central portion 26 supporting strut 32 of the protective grid 6. In this way, a high radial stability of the protective grid 6 is achieved, in particular in the case of an even number of support sections 22 and support struts 32 with radially symmetric distribution, because then two support struts 32 are diametrically opposite each other on a common diameter line, so that in the direction of this diameter line almost no elastic deformation in the radial direction is possible.

Es ist zweckmäßig, das Schutzgitter 6 als einstückiges Formteil aus Kunststoff auszubilden. Alternativ kann aber das Schutzgitter 6 auch zumindest teilweise aus Metall, insbesondere aus einem Metalldraht, bestehen.It is expedient to form the protective grid 6 as a one-piece molded part made of plastic. Alternatively, however, the protective grid 6 may also consist at least partially of metal, in particular of a metal wire.

Auch das Abdeckteil 2 ist bevorzugt als Kunststoff-Formteil gebildet, wobei die Rastansätze 10 einstückig angeformt sind. Dabei kann das Abdeckteil 2 - wie in Fig. 1 bis 3 erkennbar - insgesamt ringförmig mit einer ebenfalls kreisförmigen Außenkontur (z.B. als so genannter "Wandring") oder als Gehäuse-/Wandungsteil mit beliebiger, z.B. rechteckiger oder quadratischer Außenkontur mit gegebenenfalls abgerundeten oder abgeschrägten Ecken (z.B. als "Frontpiatte") ausgebildet sein.Also, the cover 2 is preferably formed as a plastic molded part, wherein the locking lugs 10 are integrally formed. In this case, the cover 2 - as in Fig. 1 to 3 recognizable - overall annular with a likewise circular outer contour (eg as a so-called "wall ring") or as a housing / wall part with any, eg rectangular or square outer contour with optionally rounded or bevelled corners (eg as "Frontpiatte") may be formed.

Das Schutzgitter 6 weist mindestens drei, insbesondere wie dargestellt vier Rastelemente 12 in einer radialsymmetrischen Umfangsverteilung auf. Dies gilt entsprechend auch für die Anzahl und Anordnung der Raststreben 30, der Stützabschnitte 22 und der Tragstreben 32.The protective grid 6 has at least three, in particular as shown, four locking elements 12 in a radially symmetrical circumferential distribution. This also applies accordingly to the number and arrangement of the locking struts 30, the support sections 22 and the support struts 32nd

Die Anzahl der kreisförmigen bzw. kreisringförmigen Schutzstreben 28 ist von der Größe der zu überdeckenden Durchlassöffnung 4 und den maximalen Sicherheitsabständen zwischen den benachbarten Schutzstreben 28 abhängig. Im dargestellten Beispiel sind sieben Schutzstreben 28 konzentrisch um das zentrische Mittelteil 26 herum vorgesehen, wobei jedes Rastelement 12 über die zugehörige Raststrebe 30 mit den fünf äußeren Schutzstreben 28 verbunden ist. Abweichend von dieser bevorzugten Ausführung sind aber auch beliebige andere Ausführungsformen möglich.The number of circular or annular protection struts 28 is dependent on the size of the passage opening 4 to be covered and the maximum safety distances between the adjacent protection struts 28. In the example shown, seven protection struts 28 are provided concentrically around the central central part 26 around, each locking element 12 is connected via the associated locking strut 30 with the five outer protection struts 28. Deviating from this preferred embodiment but also any other embodiments are possible.

Insoweit ist die Erfindung nicht auf das beschriebene Ausführungsbeispiel beschränkt, sondern umfasst auch alle im Sinne der Erfindung gleichwirkenden Ausführungen. Es wird ausdrücklich betont, dass die Ausführungsbeispiele nicht auf alle Merkmale in Kombination beschränkt sind, vielmehr kann jedes einzelne Teilmerkmal auch losgelöst von allen anderen Teilmerkmalen für sich eine erfinderische Bedeutung haben. Ferner ist die Erfindung bislang auch noch nicht auf die im Anspruch 1 definierte Merkmalskombination beschränkt, sondern kann auch durch jede beliebige andere Kombination von bestimmten Merkmalen aller insgesamt offenbarten Einzelmerkmalen definiert sein. Dies bedeutet, dass grundsätzlich praktisch jedes Einzelmerkmal des Anspruchs 1 weggelassen bzw. durch mindestens ein an anderer Stelle der Anmeldung offenbartes Einzelmerkmal ersetzt werden kann. Insofern ist der Anspruch 1 lediglich als ein erster Formulierungsversuch für eine Erfindung zu verstehen.In that regard, the invention is not limited to the embodiment described, but also includes all the same in the context of the invention embodiments. It is expressly emphasized that the exemplary embodiments are not limited to all the features in combination, but rather each individual partial feature may also have an inventive meaning independently of all other partial features. Furthermore, the invention has hitherto not been limited to the feature combination defined in claim 1, but may also be defined by any other combination of specific features of all individually disclosed individual features. This means that in principle virtually every single feature of claim 1 omitted or by at least one to another Site of the application disclosed individual feature can be replaced. In this respect, the claim 1 is to be understood only as a first formulation attempt for an invention.

Claims (12)

Schutzgitter-Anordnung (1) für einen Lüfter, bestehend aus einem Abdeckteil (2) mit einer Luft-Durchlassöffnung (4) und aus einem im Bereich der Durchlassöffnung (4) diese zum Berührungsschutz verschließend mit dem Abdeckteil (2) über mehrere über den Umfang verteilt angeordnete Rastverbindungen (8) verbundenen oder verbindbaren Schutzgitter (6), wobei jede Rastverbindung (8) aus einem in der Durchlassöffnung (4) angeordneten Rastansatz (10) und einem an dem Schutzgitter (6) angeordneten Rastelement (12) besteht,
dadurch gekennzeichnet, dass die Rastelemente (12) am Außenrand des Schutzgitters (6) in dessen Gitterebene angeordnet sind, wobei das Schutzgitter (6) im Bereich jedes Rastelementes (12) derart federelastisch verformbar ausgebildet ist, dass jedes Rastelement (12) zum Verrasten und Lösen der Rastverbindung (8) unter bereichsweiser elastischer Verformung des Schutzgitters (6) radial relativ zu dem zugehörigen Rastansatz (10) bewegbar ist.Protective grid arrangement (1) for a ventilator, comprising a cover part (2) with an air passage opening (4) and one in the area of the passage opening (4) enclosing it for contact protection with the cover part (2) over a plurality over the circumference distributed locking connections (8) connected or connectable protective grid (6), each latching connection (8) consists of a in the passage opening (4) arranged latching projection (10) and one on the protective grid (6) arranged latching element (12),
characterized in that the latching elements (12) are arranged on the outer edge of the protective grid (6) in the lattice plane, wherein the protective grid (6) in the region of each latching element (12) is designed resiliently deformable such that each latching element (12) for latching and Releasing the latching connection (8) is under radial elastic deformation of the protective grid (6) radially relative to the associated locking projection (10) is movable. Schutzgitter-Anordnung nach Anspruch 1,
dadurch gekennzeichnet, dass die Durchlassöffnung (4) des Abdeckteils (2) einen sich düsenartig von einer Außenseite zu einer Innenseite verjüngenden Öffnungsrand (16) mit einer im Längsschnitt schräg, insbesondere konvex gekrümmt verlaufenden Oberfläche aufweist.Protective grid arrangement according to claim 1,
characterized in that the passage opening (4) of the cover part (2) has a nozzle-like tapering from an outer side to an inner opening edge (16) with a longitudinally oblique, in particular convexly curved surface extending. Schutzgitter-Anordnung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass jedes Rastelement (12) des Schutzgitters (6) einen radial nach außen ragenden, gabelartigen Endabschnitt (18) aufweist, der den zugehörigen Rastansatz (10) des Abdeckteils (2) in Umfangsrichtung beidseitig umgreift.Protective grid arrangement according to Claim 1 or 2,
characterized in that each latching element (12) of the protective grid (6) has a radially outwardly projecting, fork-like end portion (18) which engages around the associated latching projection (10) of the cover (2) in the circumferential direction on both sides. Schutzgitter-Anordnung nach Anspruch 2 oder 3,
dadurch gekennzeichnet, dass jedes Rastelement (12) im freien Endbereich eine an die Oberflächenkontur des Öffnungsrandes (16) der Durchlassöffnung (4) des Abdeckteils (2) angepasste Auflagekontur (20) aufweist.Protective grid arrangement according to claim 2 or 3,
characterized in that each latching element (12) in the free end region to the surface contour of the opening edge (16) of the passage opening (4) of the cover (2) adapted support contour (20). Schutzgitter-Anordnung nach einem der Ansprüche 2 bis 4,
dadurch gekennzeichnet, dass das Schutzgitter (6) in Umfangsrichtung jeweils zwischen zwei benachbarten Rastelementen (12) einen radialen Stützabschnitt (22) mit einer endseitigen Anlagekontur (24) zur radialen und axialen Anlage auf dem Öffnungsrand (16) der Durchlassöffnung (4) des Abdeckteils (2) aufweist, wobei vorzugsweise im verrasteten Zustand des Schutzgitters (6) die Stützabschnitte (22) axial und radial spielfrei mit einer elastischen Anlagekraft auf dem Öffnungsrand (16) aufliegen.Protective grid arrangement according to one of Claims 2 to 4,
characterized in that the protective grid (6) in the circumferential direction between each two adjacent locking elements (12) has a radial support portion (22) with an end-side contact contour (24) for radial and axial contact on the opening edge (16) of the passage opening (4) of the cover (2), wherein preferably in the latched state of the protective grid (6), the support portions (22) axially and radially backlash rest with a resilient contact force on the opening edge (16). Schutzgitter-Anordnung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, dass das Schutzgitter (6) in Anpassung an die kreisförmige Durchlassöffnung (4) aus einem zentrischen, insbesondere kreisscheibenförmigen Mittelteil (26) und mehreren konzentrischen, kreisförmigen Schutzstreben (28) besteht.Protective grid arrangement according to one of claims 1 to 5,
characterized in that the protective grid (6) in adaptation to the circular passage opening (4) consists of a central, in particular circular disk-shaped central part (26) and a plurality of concentric, circular protective struts (28). Schutzgitter-Anordnung nach Anspruch 6,
dadurch gekennzeichnet, dass das Schutzgitter (6) im Bereich jedes Rastelementes (12) eine radial nach innen verlaufende Raststrebe (30) aufweist, die mit einem radialen Abstand von dem Mittelteil (26) insbesondere an einer der Schutzstreben (28) endet.Protective grid arrangement according to Claim 6,
characterized in that the protective grid (6) in the region of each locking element (12) has a radially inwardly extending locking strut (30) which ends at a radial distance from the central part (26) in particular on one of the protective struts (28). Schutzgitter-Anordnung nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, dass jedes Rastelement (12) und der zugehörige Rastansatz (10) derart einerseits über Schrägflächen und andererseits über Rastflächen zusammenwirken, dass beim Fügen und Verrasten durch eine axiale Fügebewegung über die Schrägflächen selbsttätig eine elastische Radialbewegung jedes Rastelementes (12) bewirkt wird, und dass nach dem Verrasten über die Rastflächen ein axialer Formschluss gewährleistet ist.Grille arrangement according to one of claims 1 to 7,
characterized in that each latching element (12) and the associated latching projection (10) on one hand via inclined surfaces and on the other hand cooperate via latching surfaces, that during joining and locking by an axial joining movement on the inclined surfaces automatically elastic radial movement of each latching element (12) is effected and that after locking over the locking surfaces an axial positive locking is ensured. Schutzgitter-Anordnung nach einem der Ansprüche 5 bis 8,
dadurch gekennzeichnet, dass jeder Stützabschnitt (22) von einem freien, radial vorstehenden Ende einer radial nach innen, durchgehend bis zu dem Mittelteil (26) verlaufenden Tragstrebe (32) des Schutzgitters (6) gebildet ist.Protective grid arrangement according to one of claims 5 to 8,
characterized in that each support section (22) is formed by a free, radially projecting end of a support strut (32) of the protective grille (6) running radially inwards, continuously up to the central part (26). Schutzgitter-Anordnung nach einem der Ansprüche 1 bis 9,
dadurch gekennzeichnet, dass das Schutzgitter (6) als einstückiges Formteil aus Kunststoff gebildet ist.Grille arrangement according to one of claims 1 to 9,
characterized in that the protective grid (6) is formed as a one-piece molded part made of plastic. Schutzgitter-Anordnung nach einem der Ansprüche 1 bis 9,
dadurch gekennzeichnet, dass das Schutzgitter (6) zumindest teilweise aus einem Metall, insbesondere einem Metalldraht, besteht.Grille arrangement according to one of claims 1 to 9,
characterized in that the protective grid (6) consists at least partially of a metal, in particular a metal wire. Schutzgitter-Anordnung nach einem der Ansprüche 1 bis 11,
dadurch gekennzeichnet, dass das Schutzgitter (6) mindestens drei, insbesondere vier Rastelemente (12) in einer radialsymmetrischen Umfangsverteilung aufweist.Grille arrangement according to one of claims 1 to 11,
characterized in that the protective grid (6) has at least three, in particular four latching elements (12) in a radially symmetrical circumferential distribution.
EP20110170176 2010-07-24 2011-06-16 Protective guard assembly for ventilator Active EP2410187B1 (en)

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PT2410187E (en) 2013-03-18
CN102345624B (en) 2015-05-20
DK2410187T3 (en) 2013-06-03
EP2410187B1 (en) 2013-03-06
ES2401895T3 (en) 2013-04-25
CN102345624A (en) 2012-02-08
DE202010010623U1 (en) 2011-11-02
US9080580B2 (en) 2015-07-14
US20120020772A1 (en) 2012-01-26

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