EP3321509B1 - Blende für einen ventilator - Google Patents

Blende für einen ventilator Download PDF

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Publication number
EP3321509B1
EP3321509B1 EP16425104.3A EP16425104A EP3321509B1 EP 3321509 B1 EP3321509 B1 EP 3321509B1 EP 16425104 A EP16425104 A EP 16425104A EP 3321509 B1 EP3321509 B1 EP 3321509B1
Authority
EP
European Patent Office
Prior art keywords
blade
blades
array
blade array
connecting rod
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
EP16425104.3A
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English (en)
French (fr)
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EP3321509A1 (de
Inventor
Riccardo Danio
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.)
Munters Italy SpA
Original Assignee
Munters Italy SpA
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 Munters Italy SpA filed Critical Munters Italy SpA
Priority to DK16425104T priority Critical patent/DK3321509T3/da
Priority to ES16425104T priority patent/ES2753592T3/es
Priority to EP16425104.3A priority patent/EP3321509B1/de
Priority to CN201711096493.3A priority patent/CN108071606B/zh
Publication of EP3321509A1 publication Critical patent/EP3321509A1/de
Application granted granted Critical
Publication of EP3321509B1 publication Critical patent/EP3321509B1/de
Active legal-status Critical Current
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
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/12—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit being adapted for mounting in apertures
    • F04D25/14—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit being adapted for mounting in apertures and having shutters, e.g. automatically closed when not in use
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/003—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by throttling
    • 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
    • F04D29/002—Details, component parts, or accessories especially adapted for elastic fluid pumps

Definitions

  • the present invention relates in general to the field of axial electric fans, of the type provided with a shutter which intercepts the passage of fluid in the duct of the electric fan. More particularly, the present invention relates to a fan shutter.
  • a return element can be provided, typically a spring, connected on the one side to the frame and on the other to the plurality of blades, which cooperates with the flow of air to obtain the movement of the shutter blade.
  • An aim of the present invention is to provide a fan shutter capable of overcoming at least in part the aforementioned drawbacks.
  • the object of the invention is a fan shutter, comprising
  • the invention relates to shutters designed as a separate element that is mounted on an electric fan unit, as well as to shutters which are integrated in the electric fan unit itself.
  • the frame of the shutter can be constituted by the same casing which encloses the impeller of the electric fan.
  • FIGS 1 to 3 illustrate a first embodiment of the fan shutter according to the invention. This embodiment is intended to be positioned on the discharge side of the fan impeller.
  • the fan is not represented in the figures, but its location would be to the right of the shutter, according to the orientation shown in figures 2 and 3 .
  • the arrow A in these figures represents the direction of the air flow.
  • the shutter indicated collectively with 10, comprises a frame 11, which in the illustrated example is formed by a pair of lateral uprights 12, a pair of end cross members 13 that interconnect these uprights at their ends, and a central cross member 15 which interconnects the uprights at their intermediate positions.
  • the frame 11 thus defines a passage for an air flow positioned between the lateral uprights 12, and having an inlet and an outlet, respectively upstream and downstream of the shutter 10 according to the direction of the air flow A.
  • the inlet is oriented toward the electric fan.
  • the shutter 10 also comprises a plurality of blades 21 and 23 hinged to the lateral uprights 12 and rotatable between an open configuration ( figure 3 ) and a closed configuration ( figure 2 ) of the passage for the air flow.
  • the axes of rotation of the blades are indicated by x1 and x2.
  • Each blade 21, 23 has a substantially rectangular shape according to a plan view.
  • Each blade 21, 23 forms approximately a plane in a direction of extension orthogonal to the rotation axis x1, x2 of the blade 21, 23.
  • each blade 21, 23 has a front portion 21a, 23a, and a rear portion 21p, 23p positioned on opposite sides of the rotation axis x1, x2 of the blade.
  • the front portion 21a, 23a has a greater extension than the rear portion 21p, 23p.
  • the plurality of blades comprises an upper blade array 21 and a lower blade array 23 having the opposite direction of rotation.
  • the two blade arrays are arranged in mirror symmetry with respect to a plane passing through the central cross member 15.
  • the number of blades is the same for the two arrays; in an embodiment not illustrated, the number of blades may be different. In the latter case, it is advisable to make the difference in the number of blades small, at most less than half of the total number of blades of the smallest array.
  • the spatial terms used in the present description refer to the operating position of the fan, which is substantially vertical, as shown in the figures. In the example shown, in the closed position ( figure 2 ) the upper blades 21 are lowered and the lower blades 23 are raised.
  • the upper blades 21 are raised and the lower blades 23 are lowered.
  • the short sides of the blades 21 and 23 rest against abutments 25 positioned on the lateral uprights 12 of the frame 11.
  • the long sides of the central blades 21, 23 of each array rest against the long sides of the immediately adjacent blades 21, 23 and one long side of each end blade 21, 23 of each array rests against abutments formed on the frame 11 at the end cross members 13 or the central cross member 15.
  • the blades 21 and 23 form a certain angle, for example approximately 90°, with respect to their respective closed positions.
  • the blades of the upper blade array 21 and the blades of the lower blade array are arranged in mirror symmetry, i.e. the inside angle that each upper blade forms with respect to a vertical axis is equal to the inside angle that each lower blade forms with respect to the same vertical axis.
  • a slight offset may be provided (for example of 1-5°) between the two arrays with respect to the arrangement in mirror symmetry indicated above.
  • the upper blades 21 tend, due to gravity, to assume the closed configuration, while the lower blades 23 tend to assume the open configuration.
  • the lower blades 23 tend to assume the open configuration.
  • the upper blades 21 are interconnected in such a way as to rotate simultaneously in the same direction of rotation.
  • the blades 21 of the upper blade array 21 are interconnected by the upper rigid connecting rod 31 positioned near one of the short sides of the blades 21a.
  • Each blade 21 of the upper blade array 21 is hinged to the upper connecting rod 31 at a hinging point x3 positioned outside the plane formed by the blade 21.
  • each upper blade 21 is rigidly connected to a crank 41, by which the blade 21 is hinged to the upper connecting rod 31.
  • this can be achieved by means of gear wheels.
  • the lower blades 23 are linked together in such a way as to rotate simultaneously in the same direction of rotation.
  • the blades 23 of the lower blade array 23 are linked together by the lower rigid connecting rod 33 positioned near one of the short sides of the blades 23a.
  • Each blade 23 of the lower blade array 23 is hinged to the lower connecting rod 33 at a hinging point x4 positioned outside the plane formed by the blade 23.
  • each lower blade 23 is rigidly connected to a crank 43, through which the blade 23 is hinged to the lower connecting rod 33.
  • this can be achieved by means of gear wheels.
  • a drive which connects the upper blade array 21 to the lower blade array 23 in such a way that the two blade arrays 21, 23 have opposite directions of rotation, and the tendency due to gravity of the upper blades 21 to assume the passage's closed configuration is countered by the tendency due to gravity of the lower blades 23 to assume the open configuration. If the number of blades of the upper blade array were different from the number of blades of the lower blade array, the tendencies of the two arrays would however be in reciprocal opposition.
  • this drive comprises an upper geared element 61 and a lower geared element 63 (for example, in the case illustrated, two geared sectors) in reciprocal engagement and having respective axes of rotation x5 and x6, positioned substantially at the level of the central cross member 15.
  • the upper and lower connecting rods 31 and 33, beyond the respective end blades 21, 23 of the upper blade array 21 and the lower blade array 23 have respective extensions 71 and 73 hinged respectively to the upper geared element 61 and the lower geared element 63, at the respective hinging points x7 and x8.
  • the action of the force of gravity on the blades is balanced and does not influence the mechanism: the shutter is therefore neutral. If the two blade arrays had a different number of blades, as long as the difference was small, the shutter would still be almost neutral, taking friction into account.
  • the opening occurs by direct effect of the air flow, which generates a moment on the blades due to their hinging.
  • Closing occurs instead due to (at least) one elastic return element 81, for example a traction spring, connected on one side to the frame 11 and on the other to the plurality of blades 21, 23.
  • the return element 81 is connected to the lower blade array 23 and is positioned in such a way as to apply on the blade array 23 a maximum moment of the return force in the closed configuration and a minimum in the open configuration.
  • the elastic return element 81 is a linear elastic member having opposite ends, respectively hinged to the frame 11 and to one of the blades of the lower blade array 23, via a connecting element 83 rigidly connected to the blade 23 in question.
  • the elastic return element 81 defines, with respect to the rotation axis x3 of said blade 23, an arm b of the variable elastic return force that is at its maximum in the closed configuration and at its minimum in the open configuration, as is shown in figures 2 and 3 .
  • the return action acting on the blades is at its maximum when the shutter is closed to encourage the sealing of the same, and at its minimum when the shutter is open, not to limit the degree of opening while allowing the shutter to close once the effect of the air flow has ceased.
  • FIGs 4 to 6 illustrate a second embodiment of the fan shutter according to the invention.
  • This embodiment is suitable to be arranged on the inlet side of the fan impeller.
  • the fan is not represented in the figures, but its location would be to the left of the shutter, according to the orientation shown in figures 5 and 6 .
  • the arrow A in these figures represents the direction of the air flow.
  • FIG. 4-6 This embodiment is substantially identical to the above; accordingly, for a detailed description thereof reference is made to what has been explained with respect to the previous embodiment. For this reason, in figures 4-6 the same numerical references were used as in figures 1-3 .
  • the embodiment of figures 4-6 differs from the previous essentially by the fact that the frame and the drive and return mechanism of the blades are positioned, with respect to the position of the rotation axes x1 and x2 of the blades 21 and 23, on the side the front portion 21a, 23a of these blades (in the previous embodiment they were arranged on the side of the rear portion 21p, 23p).
  • the shutter can be integrated into the structure of an electric fan unit on the discharge side or on the suction side of the fan.
  • the frame of the shutter can be constituted by a portion of the casing which contains the impeller of the electric fan.
  • the constructive details of the shutter may vary widely with respect to what is described above.
  • the drive that ensures the counter-rotation and the balancing of the two blade arrays may have a different number of gear wheels, and/or with different shapes, or also consist of a different type of drive from the geared drive, for example a lever mechanism or a belt drive, or a combination of different types of drives.
  • connection between the blades of a single array can be obtained in a different manner from the rigid connecting rod described above, for example with a series of gear wheels respectively associated with each blade, and between which are interposed counter-rotating gear wheels.
  • the method for connecting the elastic return element to the frame and to the blades may vary with respect to what is described above.
  • the shape of the elastic return element may be different; instead of a linear element working in traction, it is possible, for example, to use a linear element working in compression, or even an elastic element working in torsion, arranged coaxially with the rotation axis of one of the blades.
  • a weight attached to one of the blades of the upper blade array or the lower blade array, via a connecting element rigidly connected to the blade in question may be used.
  • the return element is positioned so as to define a center of gravity whose position relative to the rotation axis of the blade determines the arm of the force of gravity (provided by the weight in question) which is at its maximum in the closed configuration and at its minimum in the open configuration.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Air-Flow Control Members (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)

Claims (7)

  1. Lüfterverschluss bzw. -blende, umfassend
    einen Rahmen (11), der mit einem Paar seitlicher Stützen bzw. Streben (12) versehen ist und einen Durchgang für einen Luftstrom definiert, der zwischen den seitlichen Stützen (12) positioniert ist, und einen Einlass und einen Auslass aufweist,
    eine Mehrzahl von Lamellen (21, 23), die an den seitlichen Stützen (12) angelenkt sind und zwischen einer offenen Durchgangskonfiguration und einer geschlossenen Durchgangskonfiguration drehbar sind, wobei die Mehrzahl von Lamellen (21, 23) die offene Durchgangskonfiguration durch den direkten Effekt eines Luftstroms zwischen dem Einlass und dem Auslass des Durchgangs annehmen kann, und
    ein Rückstellelement (81), das mit der Mehrzahl von Lamellen (21, 23) verbunden ist und so angeordnet ist, dass es auf die Lamellen (21, 23) eine Rückstellkraft ausübt, um die Lamellen (21, 23) zu der geschlossenen Durchgangskonfiguration zurückzustellen,
    dadurch gekennzeichnet, dass
    die Mehrzahl von Lamellen (21, 23) eine obere Lamellenanordnung (21) und eine untere Lamellenanordnung (23) umfasst, wobei die oberen Lamellen (21) so miteinander verbunden sind, dass sie sich gleichzeitig in der gleichen Drehrichtung drehen, und so geschwenkt werden, dass sie dazu tendieren, durch Schwerkraft eine der offenen oder geschlossenen Durchgangskonfiguration des Durchgangs anzunehmen, und wobei die unteren Lamellen (23) so miteinander verbunden sind, dass sie sich gleichzeitig in der gleichen Drehrichtung drehen, und so geschwenkt werden, dass sie dazu tendieren, durch Schwerkraft die andere der offenen oder geschlossenen Durchgangskonfiguration des Durchgangs anzunehmen,
    wobei ein Antrieb (61, 63) bereitgestellt ist, der die obere Lamellenanordnung (21) mit der unteren Lamellenanordnung (23) derart verbindet, dass die beiden Lamellenanordnungen (21, 23) entgegengesetzt der Drehrichtung sind und der Tendenz der oberen Lamellen (21), durch Schwerkraft eine der offenen oder geschlossenen Durchgangskonfiguration anzunehmen, mit der Tendenz der unteren Lamellen (23), die andere der offenen oder geschlossenen Durchgangskonfiguration anzunehmen, begegnet wird, und
    wobei das Rückstellelement (81) mit zumindest einer der oberen (21) und unteren Lamellenanordnung (23) verbunden ist und so angeordnet ist, dass es auf die Lamellenanordnung(en) (21, 23) ein maximales Moment der Rückstellkraft in der geschlossenen Durchgangskonfiguration und ein minimales Moment der Rückstellkraft in der offenen Durchgangskonfiguration ausübt.
  2. Verschluss nach Anspruch 1, wobei jede Lamelle (21, 23) ungefähr eine Ebene in einer Erstreckungsrichtung orthogonal zu der Rotationsachse (x1, x2) der Lamelle (21, 23) bildet, wobei in der jeweiligen Erstreckungsrichtung jede Lamelle (21, 23) einen vorderen Abschnitt (21a, 23a) und einen hinteren Abschnitt (21p, 23p) aufweist, die auf gegenüberliegenden Seiten der Rotationsachse (x1, x2) der Lamelle (21, 23) positioniert sind, wobei der vordere Abschnitt (21a, 23a) eine größere Erstreckung aufweist als der hintere Abschnitt (21p, 23p).
  3. Verschluss nach Anspruch 2, wobei die Lamellen der oberen Lamellenanordnung (21) mittels einer oberen starren Verbindungsstange (31) miteinander verbunden sind, wobei jede Lamelle der oberen Lamellenanordnung (21) an der oberen Verbindungsstange (31) an einem Gelenkpunkt (x3) angelenkt ist, der außerhalb der von der Lamelle (21) gebildeten Ebene angeordnet ist, und wobei die Lamellen der unteren Lamellenanordnung (23) mittels einer unteren starren Verbindungsstange (33) miteinander verbunden sind, wobei jede Lamelle der unteren Lamellenanordnung (23) an der unteren Verbindungsstange (33) an einem Gelenkpunkt (x4) angelenkt ist, der außerhalb der von der Lamelle (23) gebildeten Ebene positioniert ist.
  4. Verschluss nach Anspruch 3, wobei der Antrieb ein oberes Zahnradelement (61) und ein unteres Zahnradelement (63) in wechselseitigem Eingriff und mit jeweiligen Drehachsen (x5, x6) aufweist, wobei die obere und die untere Verbindungsstange (31, 33) zusätzlich zu den jeweiligen Endlamellen der oberen Lamellenanordnung (21) und der unteren Lamellenanordnung (23) jeweilige Verlängerungen (71, 73) aufweisen, die jeweils an dem oberen Zahnradelement (61) und an dem unteren Zahnradelement (63) angelenkt sind, und wobei
    a) die Drehachse (x1) der Endlamelle der oberen Lamellenanordnung (21), der Gelenkpunkt (x3) der Endlamelle der oberen Lamellenanordnung (21) mit der oberen Verbindungsstange (31), der Gelenkpunkt (x7) der Verlängerung (71) der oberen Verbindungsstange (31) mit dem oberen Zahnradelement (61) und der Drehachse (x5) des oberen Zahnradelements (61), und
    b) die Drehachse (x2) der Endlamelle der unteren Lamellenanordnung (23), der Gelenkpunkt der Endlamelle der unteren Lamellenanordnung (23) der unteren Verbindungsstange (33), der Gelenkpunkt (x8) der Verlängerung (73) der unteren Verbindungsstange (33) mit dem unteren Zahnradelement (63) und die Drehachse (x6) des unteren Zahnradelements (63)
    die Eckpunkte eines oberen Gelenkparallelogramms bzw. ein unteren Gelenkparallelogramms definieren.
  5. Verschluss nach einem der vorhergehenden Ansprüche, wobei das Rückstellelement (81) mit einer der Lamellen der oberen Lamellenanordnung (21) oder der unteren Lamellenanordnung (23) verbunden ist und derart positioniert ist, dass es in Bezug auf die Drehachse (x1, x2) der Lamelle einen maximalen Arm (b) der Rückstellkraft in der geschlossenen Durchgangskonfiguration und einen minimalen Arm der Rückstellkraft in der offenen Durchgangskonfiguration definiert.
  6. Verschluss nach einem der vorhergehenden Ansprüche, wobei das Rückstellelement ein elastisches Element ist, das auf der einen Seite mit dem Rahmen (11) und auf der anderen Seite mit der Mehrzahl von Lamellen (21, 23) verbunden ist.
  7. Verschluss nach einem der Ansprüche 1 bis 5, wobei das Rückstellelement ein Gewicht ist, das mit einer der Lamellen der oberen Lamellenanordnung (21) oder der unteren Lamellenanordnung (23) verbunden ist, wobei das Rückstellelement derart positioniert ist, dass es einen Schwerpunkt definiert, wobei die Position in Bezug auf die Drehsachse (x1, x2) der Lamelle einen maximalen Arm (b) der Schwerkraft in der geschlossenen Durchgangskonfiguration und einen minimalen Arm der Rückstellkraft in der offenen Durchgangskonfiguration bestimmt.
EP16425104.3A 2016-11-10 2016-11-10 Blende für einen ventilator Active EP3321509B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DK16425104T DK3321509T3 (da) 2016-11-10 2016-11-10 En afskærmning til ventilator
ES16425104T ES2753592T3 (es) 2016-11-10 2016-11-10 Un obturador para ventilador
EP16425104.3A EP3321509B1 (de) 2016-11-10 2016-11-10 Blende für einen ventilator
CN201711096493.3A CN108071606B (zh) 2016-11-10 2017-11-09 风扇挡板

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16425104.3A EP3321509B1 (de) 2016-11-10 2016-11-10 Blende für einen ventilator

Publications (2)

Publication Number Publication Date
EP3321509A1 EP3321509A1 (de) 2018-05-16
EP3321509B1 true EP3321509B1 (de) 2019-08-07

Family

ID=57590461

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16425104.3A Active EP3321509B1 (de) 2016-11-10 2016-11-10 Blende für einen ventilator

Country Status (4)

Country Link
EP (1) EP3321509B1 (de)
CN (1) CN108071606B (de)
DK (1) DK3321509T3 (de)
ES (1) ES2753592T3 (de)

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AU546093B2 (en) * 1980-09-03 1985-08-15 S.W. Hart & Co. Pty. Ltd. Louvre assembly
CN85203799U (zh) * 1985-09-13 1986-05-21 郭田丰 自动遮隔式轴流家用换气扇
IT1259380B (it) 1992-04-01 1996-03-12 Euroemme Spa Dispositivo regolatore centrifugo per l'apertura e la chiusura della serranda di un gruppo elettroventilatore assiale e gruppo elettroventilatore utilizzante tale dispositivo
US6181557B1 (en) * 1999-10-29 2001-01-30 Motorola, Inc. Electronic component, method of cooling, and damper therefor
CN202811536U (zh) * 2012-04-16 2013-03-20 李才 一种带百叶片的排风机
KR101413178B1 (ko) * 2012-07-18 2014-06-27 주식회사 팬직 풍압에 의해 구동되는 셔터를 구비하는 송풍기
CN204851743U (zh) * 2015-08-13 2015-12-09 中山市安阁宜家生活电器有限公司 一种连杆机构、排气扇用百叶窗及排气扇

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Also Published As

Publication number Publication date
CN108071606A (zh) 2018-05-25
EP3321509A1 (de) 2018-05-16
DK3321509T3 (da) 2019-11-11
ES2753592T3 (es) 2020-04-13
CN108071606B (zh) 2020-11-20

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