EP3321509B1 - Tablier pour ventilateur - Google Patents

Tablier pour ventilateur 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
Other languages
German (de)
English (en)
Other versions
EP3321509A1 (fr
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 ES16425104T priority Critical patent/ES2753592T3/es
Priority to DK16425104T priority patent/DK3321509T3/da
Priority to EP16425104.3A priority patent/EP3321509B1/fr
Priority to CN201711096493.3A priority patent/CN108071606B/zh
Publication of EP3321509A1 publication Critical patent/EP3321509A1/fr
Application granted granted Critical
Publication of EP3321509B1 publication Critical patent/EP3321509B1/fr
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. Volet de ventilateur, comprenant,
    un cadre (11) pourvu d'une paire de montants latéraux (12) et définissant un passage pour un flux d'air positionné entre les montants latéraux (12), et ayant une entrée et une sortie,
    une pluralité de lamelles (21, 23) s'articulant sur les montants latéraux (12) et pouvant tourner entre une configuration de passage ouvert et une configuration de passage fermé, dans lequel la pluralité de lamelles (21, 23) est capable d'adopter la configuration de passage ouvert par le biais de l'effet direct d'un flux d'air entre l'entrée et la sortie du passage, et
    un élément de rappel (81) relié à la pluralité de lamelles (21, 23) et agencé d'une façon à appliquer sur les lamelles (21, 23) une force de rappel pour ramener les lamelles (21, 23) vers la configuration de passage fermé,
    caractérisé en ce que
    la pluralité de lamelles (21, 23) comprend un groupe de lamelles supérieures (21) et un groupe de lamelles inférieures (23), les lamelles supérieures (21) étant reliées entre elles de manière à tourner simultanément dans la même direction de rotation et pivotant de manière à adopter par gravité l'une desdites configurations de passage ouvert ou fermé, et les lamelles inférieures (23) étant reliées entre elles de manière à tourner simultanément dans la même direction de rotation et pivotant de manière à adopter par gravité l'autre desdites configurations de passage ouvert ou fermé,
    dans lequel un élément d'entraînement (61, 63) est prévu, lequel relie le groupe de lamelles supérieures (21) au groupe de lamelles inférieures (23) d'une manière telle que les deux groupes de lamelles (21, 23) sont opposés à la direction de rotation et la tendance des lamelles supérieures (21) à adopter par gravité l'une desdites configurations de passage ouvert ou fermé est contrée par la tendance des lamelles inférieures (23) à adopter par gravité l'autre desdites configurations de passage ouvert ou fermé, et
    dans lequel l'élément de rappel (81) est relié à au moins l'un desdits groupes de lamelles supérieures (21) et inférieures (23) et est agencé de manière à appliquer sur le(s) groupe(s) de lamelles (21, 23) un moment maximum de la force de rappel dans la configuration de passage fermé et un moment minimum de la force de rappel dans la configuration de passage ouvert.
  2. Volet selon la revendication 1, dans lequel chaque lamelle (21, 23) forme approximativement un plan dans une direction d'extension orthogonale à l'axe de rotation (x1, x2) de la lamelle (21, 23), dans lequel, dans la direction d'extension respective, chaque lamelle (21, 23) comporte une partie avant (21a, 23a) et une partie arrière (21p, 23p) positionnées sur des côtés opposés de l'axe de rotation (x1, x2) de la lamelle (21, 23), la partie avant (21a, 23a) ayant une extension supérieure à celle de la partie arrière (21p, 23p).
  3. Volet selon la revendication 2, dans lequel les lamelles du groupe de lamelles supérieures (21) sont reliées entre elles à l'aide d'une tige de liaison rigide supérieure (31), chaque lamelle du groupe de lamelles supérieures (21) s'articulant sur la tige de liaison supérieure (31) au niveau d'un point d'articulation (x3) positionné à l'extérieur du plan formé par la lamelle (21), et dans lequel les lamelles du groupe de lamelles inférieures (23) sont reliées entre elles à l'aide d'une tige de liaison rigide inférieure (33), chaque lamelle du groupe de lamelles inférieures (23) s'articulant sur la tige de liaison inférieure (33) au niveau d'un point d'articulation (x4) positionné à l'extérieur du plan formé par la lamelle (23).
  4. Volet selon la revendication 3, dans lequel l'élément d'entraînement comprend un élément à engrenage supérieur (61) et un élément à engrenage inférieur (63) en prise réciproque et ayant des axes de rotation (x5, x6) respectifs, dans lequel les tiges de liaison supérieure et inférieure (31, 33), en plus des lamelles d'extrémité respectives du groupe de lamelles supérieures (21) et du groupe de lamelles inférieures (23), ont des extensions (71, 73) respectives s'articulant respectivement sur l'élément à engrenage supérieur (61) et sur élément à engrenage inférieur (63), et dans lequel
    a) l'axe de rotation (x1) de la lamelle d'extrémité du groupe de lamelles supérieures (21), le point d'articulation (x3) de la lamelle d'extrémité du groupe de lamelles supérieures (21) sur la tige de liaison supérieure (31), le point d'articulation (x7) de l'extension (71) de la tige de liaison supérieure (31) sur l'élément à engrenage supérieur (61) et l'axe de rotation (x5) de l'élément à engrenage supérieur (61), et
    b) l'axe de rotation (x2) de la lamelle d'extrémité du groupe de lamelles inférieures (23), le point d'articulation de la lamelle d'extrémité du groupe de lamelles inférieures (23) sur la tige de liaison inférieure (33), le point d'articulation (x8) de l'extension (73) de la tige de liaison inférieure (33) sur l'élément à engrenage inférieur (63) et l'axe de rotation (x6) de l'élément à engrenage inférieur (63),
    définissent les sommets, respectivement, d'un parallélogramme articulé supérieur et d'un parallélogramme articulé inférieur.
  5. Volet selon l'une des revendications précédentes, dans lequel l'élément de rappel (81) est relié à l'une des lamelles du groupe de lamelles supérieures (21) du groupe de lamelles inférieures (23), et est positionné de manière à définir, par rapport à l'axe de rotation (x1, x2) de ladite lamelle, un bras maximum (b) de la force de rappel dans la configuration de passage fermé et un bras minimum de la force de rappel dans la configuration de passage ouvert.
  6. Volet selon l'une des revendications précédentes, dans lequel l'élément de rappel est un élément élastique relié sur un côté au cadre (11) et sur l'autre côté à la pluralité de lamelles (21, 23).
  7. Volet selon l'une des revendications 1 à 5, dans lequel l'élément de rappel est un poids relié à l'une des lamelles du groupe de lamelles supérieures (21) ou du groupe de lamelles inférieures (23), dans lequel l'élément de rappel est positionné de manière à définir un centre de gravité dans lequel la position par rapport à l'axe de rotation (x1, x2) de ladite lamelle détermine un bras maximum (b) de la force de gravité dans la configuration de passage fermé et un bras minimum de la force de gravité dans la configuration de passage ouvert.
EP16425104.3A 2016-11-10 2016-11-10 Tablier pour ventilateur Active EP3321509B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ES16425104T ES2753592T3 (es) 2016-11-10 2016-11-10 Un obturador para ventilador
DK16425104T DK3321509T3 (da) 2016-11-10 2016-11-10 En afskærmning til ventilator
EP16425104.3A EP3321509B1 (fr) 2016-11-10 2016-11-10 Tablier pour ventilateur
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 (fr) 2016-11-10 2016-11-10 Tablier pour ventilateur

Publications (2)

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

Family

ID=57590461

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16425104.3A Active EP3321509B1 (fr) 2016-11-10 2016-11-10 Tablier pour ventilateur

Country Status (4)

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

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Publication number Priority date Publication date Assignee Title
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

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

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