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EP 2 693 058 B1 |
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EUROPEAN PATENT SPECIFICATION |
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Mention of the grant of the patent: |
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20.04.2016 Bulletin 2016/16 |
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Date of filing: 02.08.2012 |
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International Patent Classification (IPC):
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Axial electric fan unit using a centrifugal regulator device for opening and closing
a shutter
Axiale elektrische Lüftereinheit mit einer zentrifugalen Reguliervorrichtung zum Öffnen
und Schließen einer Verschlussvorrichtung
Unité de ventilateur électrique axial utilisant un dispositif régulateur centrifuge
pour ouvrir et fermer un obturateur
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Designated Contracting States: |
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AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL
NO PL PT RO RS SE SI SK SM TR |
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Date of publication of application: |
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05.02.2014 Bulletin 2014/06 |
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Proprietor: Munters Italy S.p.A. |
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18027 Chiusavecchia (IM) (IT) |
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Inventors: |
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- Massa, Alessandro
18027 Chiusavecchia (Imperia) (IT)
- Revetria, Andrea
18027 Chiusavecchia (Imperia) (IT)
- Danio, Riccardo
18027 Chiusavecchia (Imperia) (IT)
- Bariani, Mauro
18027 Chiusavecchia (Imperia) (IT)
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Representative: Vanzini, Christian et al |
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Jacobacci & Partners S.p.A.
Corso Emilia 8 10152 Torino 10152 Torino (IT) |
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References cited: :
EP-A1- 0 563 875 US-A1- 2006 286 924
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WO-A1-03/042544
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Note: Within nine months from the publication of the mention of the grant of the European
patent, any person may give notice to the European Patent Office of opposition to
the European patent
granted. Notice of opposition shall be filed in a written reasoned statement. It shall
not be deemed to
have been filed until the opposition fee has been paid. (Art. 99(1) European Patent
Convention).
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[0001] The present invention relates to axial electric fan units provided with a shutter
which intercepts the flow of fluid in the conduit of the electric fan, and with a
centrifugal regulator device capable of causing the opening and closing of the aforesaid
shutter.
[0002] More specifically, the invention relates to an electric fan unit comprising:
a casing defining a passage for the air flow, having an inlet and an outlet, and comprising
a central support positioned between said inlet and outlet,
a fan mounted on said central support and rotatable about its own axis of rotation,
a shutter comprising a system of slats movable between a configuration in which the
passage is completely open and a configuration in which it is completely closed, and
a centrifugal regulator having
- a base element connected rotationally to the fan,
- an axially movable actuator member connected for operation to the system of slats
in order to move them toward their maximum opening configuration when the fan is activated,
- at least two articulated arms connecting the actuator member to the base element,
each of said articulated arms including a centrifugal weight and being movable by
centrifugal force in such a way as to cause the axial advance or retraction of said
actuating member, and
- a slidable coupling to guide the axial translational movement of the actuating member
relative to the base element.
[0003] According to the prior art described in patent
EP 0 563 875, the base element of the centrifugal regulator is connected integrally and directly
to a hub of the fan. This arrangement is advantageous in an installation configuration
in which the shutter is positioned at the outlet of the air flow passage; on the other
hand, if the shutter is positioned on the inlet side of the air flow passage, the
provision of a connection between the actuating member of the centrifugal regulator
and the system of slats of the shutter requires considerable modification of some
components of the unit, as well as the introduction of additional elements. In particular,
an electric fan unit with a centrifugal regulator normally configured for operation
by a pushing action must be modified for operation by a pulling action, since the
centrifugal regulator and the shutter are positioned on opposite sides of the central
support, that is to say on the outlet side and the inlet side respectively. For this
purpose, a cavity must be formed inside the regulator device, and also inside the
hub and the spindle supporting the fan and pulley, to allow the passage of an actuating
rod which connects the actuating member of the centrifugal regulator to the system
of slats of the shutter; furthermore, the actuating member must be connected to the
system of slats by means of a flexible pulling element (such as a chain), making it
necessary to use support members (such as sprocket wheels) for the pulling element.
[0004] The aforesaid solution is therefore relatively complicated and costly, and relatively
unsatisfactory in its operation, since it requires the use of a flexible pulling element
and corresponding supports.
[0005] One object of the present invention is to provide an electric fan unit in which the
centrifugal regulator can operate by a pushing action even if the shutter is positioned
on the inlet side. Another object of the present invention is to provide an electric
fan unit in which the fewest possible modifications and additional components are
introduced with respect to the known solution in order to adapt this solution to the
case in which the shutter is positioned on the inlet side.
[0006] These objects are achieved according to the invention by an electric fan unit of
the type defined in the introductory part of this description, in which the unit comprises
an axle connected integrally to said central support, on which said fan is mounted
rotatably, said axle defining the axis of rotation of the fan and having a through
cavity within which a rotating shaft is coaxially housed, a front end of this shaft
being connected integrally to said fan, while a rear end of the shaft is connected
integrally to said base element of the centrifugal regulator, said base element being
mounted rotatably on the axle, on the opposite side of the central support from said
fan.
[0007] With an arrangement of this kind, only a few components of the unit, in other words
those forming the axle, are modified in order to provide the cavity in which the rotating
shaft is housed. The additional elements present, apart from the rotating shaft, are
the components required to fasten the fan hub to one end of the rotating shaft and
to fasten the base element of the centrifugal regulator to the other end, and the
bearings by means of which this base element is supported by the axle. On the other
hand, the solution according to the invention requires no modifications for the adaptation
of the centrifugal regulator, and allows the latter to operate by a pushing action
even when the shutter is positioned on the air flow inlet side.
[0008] Preferred embodiments of the invention are defined in the dependent claims, which
are to be considered as an integral part of the present description.
[0009] Further characteristics and advantages of the fan unit according to the invention
will be made clearer by the following detailed description of an embodiment of the
invention, given with reference to the attached drawings which are provided purely
as non-limiting illustrations, in which:
- Figure 1 is a view in longitudinal section of an electric fan unit according to the
prior art;
- Figure 2 is a partial perspective view of an electric fan unit according to the invention;
- Figure 3 is a view in longitudinal section of the electric fan unit of Figure 2; and
- Figure 4 is an exploded view of some components of the electric fan unit of Figure
2.
[0010] Figure 1 shows an electric fan unit as described in
EP 0 563 875. With reference to this figure, the electric fan unit comprises a casing 2 formed
by a hollow parallelepipedal body defining a passage 4 for the flow of air. Two opposing
walls of the casing 2 have openings which form an inlet and an outlet, respectively,
for the air flow. Figure 1 shows only the outlet opening, indicated by 8. The inlet
opening, indicated by 6, is visible in Figure 2. The casing 2 comprises a central
support 10 which is positioned between the inlet and outlet of the electric fan unit,
and which, for example, is formed by one or more beams extending between opposite
walls of the casing and supported thereby. The central support 10 is conventionally
capable of supporting the internal components of the electric fan unit.
[0011] The outlet 8 is provided with a louvred shutter including a system of oscillating
slats 12 which can be operated simultaneously. Each slat is supported oscillatably
at the ends by two opposing walls of the casing 2 and is also provided at one of its
ends with a link (not shown) which has one end fastened to the slat and the other
end connected in an articulated way to a vertical connecting bar (not shown). All
the slats are therefore interconnected by means of the aforesaid bar, and it is therefore
possible to move only one of the slats and thereby cause a movement of all the slats
12. One of the aforesaid links is connected to one end of a spring (not shown). The
other end of the spring is fastened to a wall of the casing 2 in such a way that the
connecting bar is pushed upwards and all the slats 12 are kept in a configuration
of complete closure of the outlet 8.
[0012] An axle 20 is connected integrally to the central support 10. A fan 26 is mounted
on the central support 10 by means of the axle 20. The fan 26 is connected integrally
to a hub 28 mounted rotatably on the axle 20, which thus defines an axis of rotation
z for the fan. For this purpose, a bearing 29 is interposed radially between the axle
20 and a bearing seat 28a formed centrally inside the hub 28. A pulley 32 is also
fastened to the hub 28 and is connected by means of a belt 34 to an electric drive
motor (not shown) positioned inside the casing 2. An axial retaining element 33 (visible
in Figure 4 in particular) is mounted on the axle 20 to retain the hub 28 and the
pulley 32 in a predetermined axial position on the axle 20.
[0013] A centrifugal regulator device 44 is fastened directly to the end of the hub 28 which
is opposite the pulley 32. For the description of this device, reference should be
made additionally to Figure 2. The regulator 44 comprises a base element 46 formed
by a disc 80 having holes 81 for the engagement of screws for fastening to the fan,
and by two opposing spokes 82. Two arms 52 are connected in an articulated way to
the ends of the spokes 82. Two centrifugal weights 63 are fastened to the articulated
arms 52. The ends of the arms 52 located opposite the spokes 82 are connected by two
articulated bars 54 to two lateral portions 56a of an actuating member 56. The disc
80 is connected integrally to two guide bars 84 which are positioned parallel to and
at a distance from the axis of rotation z of the fan, and which extend in the opposite
direction to the fan. Two appendages 86, connected integrally to the actuating member
56, have two respective holes for slidable mounting on the guide bars 84. The actuating
member 56 has a forked part 56b to which one end of an actuating bar 68 is connected
in an articulated way. The other end of the actuating bar 68 is connected in an articulated
way to a fork 70 connected to one of the slats 12.
[0014] In the aforesaid known device, the actuating member 56 is movable between a position
adjacent to the base element 46, corresponding to the inactive condition of the fan,
and a position of maximum separation from the base element 46, corresponding to the
operating condition of the fan. The actuating member 56 therefore moves axially from
the position adjacent to the hub to the position of maximum separation as a result
of the centrifugal action of the weights 63 caused by the rotation of the fan. This
axial movement causes a corresponding movement of the slats 12 from the completely
closed configuration to the completely open configuration. The regulator device in
question operates by a pushing action; in other words, the centrifugal force acting
on the weights 63 when the electric fan is in motion causes the actuating member 56
to move towards the slats 12 in such a way that the actuating bar 68 pushes the fork
70 towards the outside of the electric fan, thus causing the slats 12 to open.
[0015] Figures 2 to 4 show an electric fan unit according to the invention. In these figures,
the parts corresponding to those of Figure 1 are indicated by the same reference numerals.
[0016] In the case of Figures 2 to 4, the louvred shutter including the system of simultaneously
operable oscillating slats 12 is positioned at the inlet opening 6, and the centrifugal
regulator 44 is positioned on the opposite side of the central support 10 from the
fan 26. In other words, whereas the fan 26 is positioned between the central support
10 and the outlet of the electric fan unit, the centrifugal regulator 44 is positioned
between the central support 10 and the inlet 6 of the electric fan unit.
[0017] The fixed axle 20 has a through cavity 91 in which a rotating shaft 93 with a polygonal
cross section is housed coaxially. A front end of the rotating shaft 93 is connected
integrally to the fan 26, by means of a front flange 95 which has a central hole 95a
for the engagement of a screw for fastening to the rotating shaft 93. The front end
of the rotating shaft 93 is fitted by means of a prismatic coupling into a housing
hole 95b formed centrally in the front flange 95; the rotating shaft 93 is therefore
fixed to the front flange 95 with respect to rotation. The fan 26 is axially interposed
between this flange 95 and the hub 28. The front flange 95 is fixed to the fan 26
and to the hub 28 with respect to rotation by means of one or more drive pins 95c
formed eccentrically on the flange 95, which engage in corresponding holes formed
in the central part of the fan 26 (these are holes which are normally already provided
for fastening the base element 46 of the centrifugal regulator). A rear end of the
rotating shaft 93 is connected integrally to the base element 46 of the centrifugal
regulator 44, by means of a rear flange 97 which has a central housing hole 97a into
which the rear end of the rotating shaft 93 is fitted by means of a prismatic coupling;
the rotating shaft 93 is therefore fixed to the rear flange 97 with respect to rotation.
The rear flange is fastened axially to the rotating shaft 93 by means of a screw and
a washer interposed between the screw and the rear flange. The rear flange 97 is mounted
rotatably on the axle 20 by means of a bearing 98 interposed radially between the
rear end of the axle 20 and a bearing seat 97b formed centrally in the rear flange
97. Between the bearing 98 and the central support 10 there are interposed a spacing
washer 98a and a tapered spring washer 98; these elements are retained axially on
the axle 20 by means of a nut 98c screwed on to the axle 20. The rear flange 97 is
axially interposed between the axle 20 and the base element 46 of the centrifugal
regulator. The base element 46 of the centrifugal regulator is fixed to the rear flange
97 with respect to rotation by means of screws for fastening to this flange, which
engage in the holes 81 formed in the base element 46 of the centrifugal regulator
(these are the holes which are normally already provided for fastening to the hub
28). As a result of this arrangement, the base element 46 and therefore the centrifugal
regulator 44 are mounted rotatably on the axle 20.
[0018] In an alternative embodiment (not shown), the arrangement of the components at the
rear end of the axle is radially inverted with respect to that described above; in
this alternative embodiment, the rear flange is mounted rotatably on the axle by means
of a bearing interposed radially between a front end of the rear flange and a bearing
seat formed centrally on a rear end of the axle. This configuration can be provided
with axles having a sufficiently large diameter.
[0019] To summarize, although in the known configuration of Figure 1 the centrifugal regulator
44 is directly connected to the hub 28, in the configuration according to the invention
of Figures 2 to 3 the centrifugal regulator 44 is connected indirectly to the hub
28 by means of the rotating shaft 93 and the front and rear flanges 95 and 97. This
enables the motion to be transmitted from the pulley/hub/fan unit to the centrifugal
regulator, even though they are positioned on opposite sides of the central support.
Furthermore, the number of modifications and additional components in the configuration
of Figures 2-4 by comparison with the configuration of Figure 1 is very small, and
essentially relates only to the axle (a modified component), the rotating shaft and
the front and rear flanges (additional components).
[0020] Clearly, provided that the principle of the invention is retained, the details of
construction and the forms of embodiment can be varied widely from what has been described
and illustrated purely by way of example, without thereby departing from the scope
of the invention as defined by the appended claims.
1. Electric fan unit comprising:
a casing (2) defining a passage for an air flow, having an inlet (6) and an outlet
(8), and comprising a central support (10) positioned between said inlet and outlet,
a fan (26) mounted on said central support and rotatable about its own axis of rotation
(z),
a shutter comprising a system of slats (12) movable between a configuration in which
the passage is completely open and a configuration in which it is completely closed,
and
a centrifugal regulator (44) having
- a base element (46) connected rotationally to the fan (26),
- an axially movable actuator member (56) connected for operation to the system of
slats in order to move them towards their maximum opening configuration when the fan
is activated,
- at least two articulated arms (52, 54) connecting the actuator member (56) to the
base element (46), each of said articulated arms including a centrifugal weight (63)
and being movable by centrifugal force in such a way as to cause the axial advance
or retraction of said actuating member, and
- a slidable coupling (84, 86) to guide the axial translational movement of the actuating
member relative to the base element;
said electric fan unit being characterized in that it comprises
an axle (20) connected fixedly to said central support, on which said fan is mounted
rotatably, said axle defining the axis of rotation (z) of the fan (26) and having
a through cavity (91) within which a rotating shaft (93) is coaxially housed, a front
end of this shaft being connected fixedly to said fan, while a rear end of the shaft
is connected fixedly to said base element of the centrifugal regulator, said base
element being mounted rotatably on the axle (20), on the opposite side of the central
support (10) from said fan.
2. Unit according to Claim 1, in which said slidable coupling comprises at least one
guide bar (84) integral with the base element (46) and extending parallel to and at
a distance from the axis of rotation (z) of the fan (26) towards the actuating member
(56), and at least one corresponding appendage (86), integral with the actuating member
(56) and having a shaped opening coupled slidably to the corresponding guide bar.
3. Unit according to Claim 1 or 2, in which a front end of the rotating shaft (93) is
connected integrally to the fan (26) by means of a front flange (95) fastened to the
rotating shaft (93), said fan being axially interposed between said front flange and
a hub (28) of the fan.
4. Unit according to Claim 3, in which the front end of the rotating shaft (93) is fitted
by means of a prismatic coupling in a housing hole (95b) formed centrally in the front
flange (95), said front flange being additionally fixed to the fan (26) and to the
hub (28) with respect to rotation by means of at least one drive pin (95c) formed
eccentrically on the front flange (95) and engaging in a corresponding hole formed
in a central part of the fan (26).
5. Unit according to any of the preceding claims, in which a rear end of the rotating
shaft (93) is connected fixedly to the base element (46) of the centrifugal regulator
(44) by means of a rear flange (97) fastened to the rotating shaft (93), said rear
flange being axially interposed between the axle (20) and the base element (46) of
the centrifugal regulator.
6. Unit according to Claim 5, in which said rear flange has a central housing hole (97a)
into which the rear end of the rotating shaft (93) is fitted by means of a prismatic
coupling.
7. Unit according to Claim 5 or 6, in which said rear flange is mounted rotatably on
the axle (20) by means of a bearing (98) interposed radially between a rear end of
the axle (20) and a bearing seat (97b) formed centrally in the rear flange (97).
8. Unit according to Claim 5 or 6, in which said rear flange is mounted rotatably on
the axle by means of a bearing interposed radially between a front end of the rear
flange and a bearing seat formed centrally in a rear end of the axle.
9. Unit according to any of the preceding claims, in which said fan is connected integrally
to a hub (28) which is mounted rotatably on the axle (20), and which is also connected
integrally to a pulley (32) connected by means of a belt (34) to an electric drive
motor.
1. Elektroventilatoreinheit, umfassend:
ein Gehäuse (2), das einen Durchlass für einen Luftstrom definiert, mit einem Einlass
(6) und einem Auslass (8), und umfassend einen zentralen Träger bzw. Stütze (10),
der bzw. die zwischen dem Einlass und dem Auslass positioniert ist,
einen Lüfter (26), der an dem zentralen Träger montiert ist und um seine eigene Drehachse
(z) drehbar ist,
einen Verschluss umfassend ein System aus Lamellen (12), der zwischen einer Konfiguration,
in welcher der Durchlass vollständig geöffnet ist, und einer Konfiguration beweglich
ist, in welcher er vollständig geschlossen ist, und
einen Zentrifugalregulator (44) mit
- einem Basiselement (46), das drehbar mit dem Lüfter (26) verbunden ist,
- ein axial bewegliches Aktuatorglied (56), das zum Betrieb mit dem System aus Lamellen
verbunden ist, um diese in ihre Konfiguration maximaler Öffnung zu bewegen, wenn der
Lüfter aktiviert ist,
- zumindest zwei drehbar angelenkte Arme (52, 54), die das Aktuatorglied (56) mit
dem Basiselement (46) verbinden, wobei jeder der drehbar angelenkten Arme ein Zentrifugalgewicht
(63) enthält und durch Zentrifugalkraft derart bewegbar ist, dass das axiale Vorrücken
bzw. Vorschieben oder Zurückziehen des Betätigungsglieds bewirkt wird, und
- eine verschiebbare Kupplung bzw. Gleitkupplung (84, 86) zum Führen der axialen Translations-
bzw. Übertragungsbewegung des Betätigungsglieds relativ zu dem Basiselement;
wobei die Elektroventilatoreinheit dadurch gekennzeichnet ist, dass sie umfasst
eine Achse (20), die fest mit dem zentralen Träger verbunden ist, auf dem der Lüfter
drehbar montiert ist, wobei die Achse die Drehachse (z) des Lüfters (26) definiert
und einen Durchgangshohlraum (91) aufweist, innerhalb dem eine Drehwelle (93) koaxial
untergebracht ist, wobei ein vorderes Ende dieser Welle fest mit dem Lüfter verbunden
ist, während ein hinteres Ende der Welle fest mit dem Basiselement des Zentrifugalregulators
verbunden ist, wobei das Basiselement drehbar an der Achse (20) montiert ist, und
zwar auf der entgegengesetzten bzw. gegenüberliegenden Seite des zentralen Trägers
(10) von dem Lüfter.
2. Einheit nach Anspruch 1, bei der die Gleitkupplung zumindest eine Führungsstange (84),
die integral mit dem Basiselement (46) ist und sich parallel zu und mit Abstand von
der Drehachse (z) des Lüfters (26) zu dem Betätigungsglied (56) hin erstreckt, und
zumindest ein Anhängsel (86), umfasst, das integral mit dem Betätigungselement (56)
ist und eine geformte Öffnung aufweist, die verschiebbar mit der entsprechenden Führungsstange
gekoppelt ist.
3. Einheit nach Anspruch 1 oder 2, bei der ein vorderes Ende der Drehwelle (93) integral
mit dem Lüfter (26) mittels eines vorderen Flansches (95) verbunden ist, der an der
Drehwelle (93) befestigt ist, wobei der Lüfter axial zwischen dem vorderen Flansch
und einer Nabe (28) des Lüfters angeordnet ist.
4. Einheit nach Anspruch 3, bei der das vordere Ende der Drehwelle (93) mittels einer
prismatischen Kupplung bzw. Prismenkupplung in ein Gehäuseloch (95b) gepasst ist,
das zentral in dem vorderen Flansch (95) gebildet ist, wobei der vordere Flansch zusätzlich
an dem Lüfter (26) und an der Nabe (28) bezüglich Drehung mittels zumindest eines
Mitnehmerstifts (95c) fixiert ist, der exzentrisch an dem vorderen Flansch (95) gebildet
ist und in ein entsprechendes Loch eingreift, das in einem zentralen Teil des Lüfters
(26) gebildet ist.
5. Einheit nach einem der vorhergehenden Ansprüche, bei der ein hinteres Ende der Drehwelle
(93) fest an dem Basiselement (46) des Zentrifugalregulators (44) mittels eines hinteren
Flansches (97) fixiert ist, der an der Drehwelle (93) befestigt ist, wobei der hintere
Flansch axial zwischen der Achse (20) und dem Basiselement (46) des Zentrifugalregulators
angeordnet ist.
6. Einheit nach Anspruch 5, bei welcher der hintere Flansch ein zentrales Gehäuseloch
(97a) aufweist, in welches das hintere Ende der Drehwelle (93) mittels einer prismatischen
Kupplung bzw. Prismenkupplung gepasst ist.
7. Einheit nach Anspruch 5 oder 6, bei welcher der hintere Flansch drehbar an der Achse
(20) mittels eines Lagers (98) montiert ist, das radial zwischen einem hinteren Ende
der Achse (20) und einem Lagersitz (97b) angeordnet ist, der zentral in dem hinteren
Flansch (97) gebildet ist.
8. Einheit nach Anspruch 5 oder 6, bei welcher der hintere Flansch drehbar an der Achse
mittels eines Lagers montiert ist, das radial zwischen einem vorderen Ende des hinteren
Flansches und einem Lagersitz angeordnet ist, der zentral in einem hinteren Ende der
Achse gebildet ist.
9. Einheit nach einem der vorhergehenden Ansprüche, bei welcher der Lüfter integral mit
einer Nabe (28) verbunden ist, die drehbar an der Achse (20) montiert ist, und der
zudem integral mit einer Umlenkrolle bzw. Riemenscheibe (32) verbunden ist, die mittels
eines Gurts (34) mit einem elektrischen Antriebsmotor verbunden ist.
1. Unité de ventilateur électrique comprenant :
un boîtier (2) définissant un passage pour un flux d'air, présentant une entrée (6)
et une sortie (8) et comprenant un support central (10) positionné entre ladite entrée
et sortie,
un ventilateur (26) monté sur ledit support central et rotatif autour de son propre
axe de rotation (z),
un obturateur comprenant un système de lamelles (12) mobile entre une configuration,
dans laquelle le passage est complètement ouvert et une configuration, dans laquelle
il est complètement fermé et
un régulateur centrifuge (44) présentant
- un élément de base (46) lié en rotation au ventilateur (26),
- un élément actionneur mobile axialement (56) relié pour le fonctionnement au système
de lamelles dans le but de les déplacer vers leur configuration d'ouverture maximum
lorsque le ventilateur est activé,
- au moins deux bras articulés (52, 54) reliant l'élément actionneur (56) à l'élément
de base (46), chacun desdits bras articulés incluant un poids centrifuge (63) et étant
mobile par la force centrifuge de manière à causer l'avance ou le recul axial dudit
élément d'actionnement, et
- un couplage coulissant (84, 86) pour guider le mouvement translationnel axial de
l'élément d'actionnement par rapport à l'élément de base ;
ladite unité de ventilateur électrique étant caractérisée en ce qu'elle comprend :
un essieu (20) relié fixement audit support central, sur lequel ledit ventilateur
est monté de manière rotative, ledit essieu définissant l'axe de rotation (z) du ventilateur
(26) et présentant une cavité débouchante (91), dans laquelle un arbre de rotation
(93) est logé coaxialement, une extrémité avant de cet arbre étant reliée fixement
audit ventilateur, alors qu'une extrémité arrière de l'arbre est reliée fixement audit
élément de base du régulateur centrifuge, ledit élément de base étant monté de manière
rotative sur l'essieu (20) sur le côté opposé du support central (10) depuis ledit
ventilateur.
2. Unité selon la revendication 1, dans laquelle ledit couplage coulissant comprend au
moins une barre de guidage (84) intégrée à l'élément de base (46) et s'étendant parallèlement
et à distance de l'axe de rotation (z) du ventilateur (26) vers l'élément d'actionnement
(56) et au moins un appendice correspondant (86), intégré à l'élément d'actionnement
(56) et présentant une ouverture conformée couplée de manière coulissante à la barre
de guidage correspondante.
3. Unité selon la revendication 1 ou 2, dans laquelle une extrémité avant de l'arbre
de rotation (93) est reliée de manière rigide au ventilateur (26) à l'aide d'une bride
avant (95) fixée à l'arbre de rotation (93), ledit ventilateur étant interposé axialement
entre ladite bride avant et un moyeu (28) du ventilateur.
4. Unité selon la revendication 3, dans laquelle l'extrémité avant de l'arbre de rotation
(93) est insérée à l'aide d'un couplage prismatique dans un trou de boîtier (95b)
formé centralement dans la bride avant (95), ladite bride avant étant en outre liée
au ventilateur (26) et au moyeu (28) en rotation à l'aide d'au moins une tige d'entraînement
(95c) formée de manière excentrique sur la bride avant (95) et s'engageant dans un
trou correspondant formé dans une partie centrale du ventilateur (26).
5. Unité selon l'une quelconque des revendications précédentes, dans laquelle une extrémité
arrière de l'arbre de rotation (93) est reliée fixement à l'élément de base (46) du
régulateur centrifuge (44) à l'aide d'une bride arrière (97) fixée sur l'arbre de
rotation (93), ladite bride arrière étant axialement interposée entre l'essieu (20)
et l'élément de base (46) du régulateur centrifuge.
6. Unité selon la revendication 5, dans laquelle ladite bride arrière a un trou de boîtier
central (97a), dans lequel l'extrémité arrière de l'arbre de rotation (93) est insérée
à l'aide d'un couplage prismatique.
7. Unité selon la revendication 5 ou 6, dans laquelle ladite bride arrière est montée
de manière rotative sur l'essieu (20) à l'aide d'un palier (98) interposé radialement
entre une extrémité arrière de l'essieu (20) et un siège de palier (97b) formé centralement
dans la bride arrière (97).
8. Unité selon la revendication 5 ou 6, dans laquelle ladite bride arrière est montée
de manière rotative sur l'essieu à l'aide d'un palier interposé radialement entre
une extrémité avant de la bride arrière et un siège de palier formé centralement dans
une extrémité arrière de l'essieu.
9. Unité selon l'une quelconque des revendications précédentes, dans laquelle ledit ventilateur
est relié de manière rigide à un moyeu (28) qui est monté de manière rotative sur
l'essieu (20) et qui est aussi relié de manière rigide à une poulie (32) reliée à
l'aide d'une courroie (34) à un moteur d'entraînement électrique.
REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only.
It does not form part of the European patent document. Even though great care has
been taken in compiling the references, errors or omissions cannot be excluded and
the EPO disclaims all liability in this regard.
Patent documents cited in the description