EP2904270B1 - Boîtier pour un ventilateur axial - Google Patents

Boîtier pour un ventilateur axial Download PDF

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Publication number
EP2904270B1
EP2904270B1 EP13717754.9A EP13717754A EP2904270B1 EP 2904270 B1 EP2904270 B1 EP 2904270B1 EP 13717754 A EP13717754 A EP 13717754A EP 2904270 B1 EP2904270 B1 EP 2904270B1
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EP
European Patent Office
Prior art keywords
diffusor
housing
outside
section
preferentially
Prior art date
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Application number
EP13717754.9A
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German (de)
English (en)
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EP2904270A1 (fr
Inventor
Oliver Haaf
Matthias Maschke
Dieter Best
Thomas Sauer
Sebastian Bundschuh
Sven BECK
Markus ENGERT
Jürgen Schöne
Alexander LUST
Sebastian Hoss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ebm Papst Mulfingen GmbH and Co KG
Original Assignee
Ebm Papst Mulfingen GmbH and Co KG
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Priority to EP13717754.9A priority Critical patent/EP2904270B1/fr
Publication of EP2904270A1 publication Critical patent/EP2904270A1/fr
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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
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/663—Sound attenuation
    • 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
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/545—Ducts
    • 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
    • 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
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/20—Casings or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/20—Three-dimensional
    • F05D2250/29—Three-dimensional machined; miscellaneous
    • F05D2250/294—Three-dimensional machined; miscellaneous grooved

Definitions

  • the present invention relates to a housing for an axial fan, comprising a wall ring with an inlet nozzle portion and an outflow-connected annular diffuser with an inflow opening and an outflow opening and a holder for an electric motor of the fan, which is arranged in an interior of the housing.
  • the diffuser is produced as a sheet metal part, resulting in relatively high production costs, however, and also has the known solution, especially in the middle and lower pressure range relatively poor efficiencies and a high noise level.
  • the US 5,567,200 discloses an axial fan having a fan wheel, a motor, a housing for the fan wheel, and attachment means for securing the motor to the housing.
  • the housing has an annular wall which is arranged at a certain distance from end regions of the blades of the fan wheel.
  • the housing has an opening through which the housing can be flowed through with air.
  • the attachment means extend substantially between the annular wall and the fan and are formed so as to support the annular wall on all sides to maintain the distance between the wall and fan.
  • a diffuser for a fan comprising an inlet opening and an outlet opening for a gaseous medium, which flows from the inlet opening in an axial main flow direction enclosed by an outer housing diffuser interior to the outlet opening.
  • the cross section of the outlet opening is larger than the cross section of the inlet opening and the cross section of the diffuser interior is enlarged, starting from the cross section of the inlet opening to the cross section of the outlet opening, wherein the outer housing forms a diffuser interior on the outside bounding outer diffuser.
  • the cross section of the outer diffuser transitions along the main flow direction from a circular cross section at the inlet opening to a non-circular cross section at the outlet opening.
  • an inner diffuser which limits the interior of the diffuser with an inner housing.
  • US 2012/039731 A1 discloses an axial fan according to the preamble of claim 1.
  • the present invention is based on the object, on the one hand to achieve a cost reduction and on the other hand to improve the efficiency and noise in the middle and lower pressure range. In addition, the installation should be simplified.
  • the invention consists of a housing according to claim 1.
  • the outer diffuser is formed from at least two partial annular sections, which are connected by means of mechanical connection means on its outer peripheral surface, and the holder of a plurality on one inner peripheral surface of the diffuser with one end attachable, circumferentially spaced, fastened in the edge region of its inflow opening Struts which are mounted with their other end to a motor flange of a motor housing of the electric motor.
  • the outer diffuser is formed from four partial ring sections and four equidistant struts are provided, which are formed in particular from two parallel spokes.
  • the outer diffuser according to the invention consists of plastic, and the mechanical connection of the individual partial ring sections takes place by means of screws or rivets or by plug connections.
  • the outer diffuser expands from its inflow opening to its outflow opening conically with a cone angle ⁇ relative to its center axis XX, preferably from 10 ° to 18 °, in particular 12 ° to 15 °.
  • the course of the peripheral wall of the diffuser can be made both straight and curved from the inflow opening to the outflow opening.
  • the diffuser has a height measured in the direction of the longitudinal axis XX above arranged in the wall ring blades of the axial fan which is greater than / equal to 200 mm to 800 mm, with a ratio of L: D1 of 0.25 to 1.0, preferably 0.25 to 0.8, where L is the height of the outer diffuser measured in the direction of the longitudinal axis XX above the blades arranged in the wall ring and D1 is the diameter of the inflow opening.
  • an inner diffuser which extends from the inflow opening to the outflow opening and has a closed circumferential wall, is arranged within the outer diffuser, preferably centric to its center axis, and which can be connected to the motor flange of the motor housing of the electric motor in the region of the inflow opening , wherein in the interior of the inner diffuser, the motor housing of the electric motor is accommodated.
  • the inner diffuser here has in the connection region for the motor flange a peripheral wall with a circular flow cross-section and forms an annular section which merges into an air duct section having a polygonal, in particular quadrangular, cross section, in particular with rounded corners.
  • This air guiding section has, in particular starting from the annular section, an end facing towards the opposite end, i. H. to the outflow opening, expanding interior space.
  • a protective grid in particular circular, is arranged, which is connected with its outer peripheral edge to the outer diffuser.
  • the inner diffuser is also connected to the protective grid, by resting on the protective grid on its side facing in the discharge direction end cover, which is so releasably connected to the Beerleitabites of the inner diffuser fastening means that the protective grid between the end cover and the air guide is included.
  • the protective grid preferably has square meshes.
  • This inlet nozzle section 3 encloses a suction channel 4, which is circular in cross-section.
  • An annular outer diffuser 6 is connected to the wall ring 2 at the free end of the inlet nozzle section 3 and has an in particular circular inflow opening 7 and an in particular circular outflow opening 8.
  • the flow direction of a medium to be transported through the housing by means of the axial fan 1 is indicated by Z.
  • the axial fan 1 consists of an electric motor 9 with which a paddle wheel 11 is drivingly connected.
  • the outer diffuser 6 consists of at least two partial ring sections 12, wherein in the illustrated embodiment, four partial annular sections 12 are shown, which are connected to each other by means of mechanical connection means 13 on an outer peripheral surface of the outer diffuser 6.
  • Each partial ring section 12 extends over a specific peripheral region, so that in the fully assembled state the partial annular sections 12 are connected to form a circumferentially closed annular section.
  • the outer diffuser 6 is advantageously made of plastic and the connecting means 13 may be, for example, screws, rivets or a latching connection.
  • the housing according to the invention has a holder of at least three struts 14, which circumferentially have mutually equal distances.
  • struts 14 are fastened in the edge region of the inflow opening 7 on the inner peripheral surface of the outer diffuser 6.
  • the struts 14 can be fastened to a motor flange 16 of the electric motor 9 or a housing 17 of the electric motor 9.
  • the struts 14 are suitably connected to each other at the end via an annular flange 14a, wherein the annular flange 14a by means of connecting means, for. B. screws is attached to the motor flange 16.
  • the struts 14 form a supporting star with the annular flange 14a.
  • the outer diffuser 6 has a height L measured in the direction of the longitudinal axis XX above arranged in the wall ring 2 and the inlet nozzle section 3 blades of the blade wheel 11, which is in particular greater than / equal to 200 mm to 800 mm inclusive.
  • L / D1 preferably 0.25 to 1.0, in particular 0.25 to 0.8, wherein D1 is the diameter of the inflow opening 7 of the outer diffuser 6.
  • the outer diffuser 6 expands from its inflow opening 7 to its outflow opening 8 conically with a relative to its central axis XX cone angle ⁇ of in particular 10 ° to 18 °, preferably 12 ° to 15 °.
  • the outer diffuser 6 has on its outer side in the region of the inflow opening 7 corresponding to the number of struts 14, ie in the present embodiment, four mounting portions 18.
  • These attachment regions 18 are in particular outwardly flared at an angle ⁇ between 90 ° and 90 ° + ⁇ and preferably have an angled portion 19 at their free end.
  • This angled portion 19 extends at an angle ⁇ to the longitudinal axis XX.
  • This bend 19 abuts against a tab 21, which is formed on the ends of the struts 14 and is also arranged at the angle ⁇ to the longitudinal axis XX.
  • the bend 19 is bolted to the respective associated tab 21, for example by means of a screw 22.
  • the wall ring 2 is screwed with a radially projecting annular collar 23 via a screw to the tab 21.
  • an inner diffuser 26 is arranged inside the outer diffuser 6, so to continue the Fig. 1 to 3 and 5 can be seen, according to the invention inside the outer diffuser 6, an inner diffuser 26 is arranged.
  • the arrangement of the inner diffuser 26 is preferably centric to the longitudinal axis XX.
  • the inner diffuser 26 extends from the inflow opening 7 to the outflow opening 8 and has a closed circumferential wall 27.
  • the inner diffuser 26 can be connected to the motor flange 16 of the motor housing 17.
  • the inner diffuser 26 in the connection region with the motor flange 16 has a circular cross-section, annular portion 28 with the inner diameter d 1 , in an air duct 29 with a particular square, in particular square cross section with preferably rounded corners passes.
  • a 1i is the opening area of the inner diffuser 26 at the beginning of its annular portion 28, and A 2i is the opening area of the inner diffuser at its end adjacent to the protective grille 36.
  • the Heilleitabites 29 has rounded corners 32. In these corners 32 Anschlußdome 33 are provided with screw holes. How out Fig. 2 it can be seen, the inner diffuser 26 is dimensioned such that in its interior, the motor housing 17 of the electric motor 9 can be accommodated.
  • the inner diffuser 26 has attachment tabs 34, preferably pointing radially inward, at the end of the annular section 28 facing the motor flange 16.
  • the inner diffuser 26 can be attached to the motor flange 16 by means of fastening means.
  • fastening means For this purpose, holes 60 are provided in the mounting flange, through which the fastening means extend. On both sides of the holes 60 stiffening portions 35 are formed in the angular range between the mounting tabs 34 and the inner diffuser 26.
  • a in a plane perpendicular to the longitudinal axis XX opening plane of the discharge opening 8 a, preferably circular, protective grid 36 is arranged, which is connected with its outer peripheral edge 37 with the outer diffuser 6 in the edge region of its discharge opening 8.
  • the protective grid 36 is formed from individual grid wires 38 which are arranged in a crosswise manner so as to form quadrangular, preferably square meshes 39.
  • the mesh size, ie the distance between the parallel running grid wires 38 is 30 mm to a maximum of 40 mm.
  • the outer diffuser 6 has, in its peripheral region encompassing the discharge opening 8, recesses 41 which are adapted to the contour of the grid wires 38, so that the grid wires 38 are received in these recesses 41.
  • the protective grid 36 has radially inwardly projecting fastening tabs which cooperate with fastening projections 42 formed on the inside of the outer diffuser 6 and are connected to the outer diffuser 6 by means of screws which are screwed into the fastening projections 42.
  • the inner diffuser 26 has a cover cover 43 which rests on the protective grid 36 on its outflow-facing side and with the air duct 29 via fasteners, such as screws, so releasably connected, that the protective grid 36 between the end cap 43 and the air guide 29 is included.
  • the connection domes 33 serve in the corners 32 of the inner diffuser 26, in which the screws are screwed through the end cover 43 into the connection domes 33.
  • this invention also has recesses 44 which are adapted to the shape and size of the grid wires 38.
  • the inner diffuser 26 in the region of its annular portion 28, in particular in the diffuser interior protruding bulges 46 has.
  • the channels formed by the bulges 46 extend the spokes of the struts 14 in the assembled state, so that the outer wall portion of the mecanicendiffusors 26 is not interrupted by the struts 14, but also forms a closed wall surface in this area.
  • a diffuser unit according to the invention consisting of the outer diffuser 6 and the inner diffuser 26 including the protective grid 36 and the end cover 13 may expediently in its preassembled state with the fan unit consisting of fan 1, the wall ring 2 and the supporting star formed from the struts 14 and the annular flange 14a be connected by plugging and screwing.
  • the screwing is done appropriately as to Fig. 4 described, wherein the outer diffuser 6 z. B. is screwed with eight screws 22.
  • the plug connection takes place between the inner diffuser 26 and the supporting star in the region of the annular flange 14a. For this it is advantageous, see Fig.
  • latching connectors 50 which are fastened to the annular flange 14a, with which in particular a non-positive or kraftformschlüssige connection between the annular flange 14a and the inner diffuser 26 is made.
  • These latching connectors 50 are preferably formed as snap hooks, see Fig. 9 ,
  • These snap hooks comprise a cylindrical attachment portion 51, which preferably has an external thread 52, with which it is screwed into a threaded bore in the annular flange 14a.
  • the attachment portion 51 has a central longitudinal axis XX. In the axial direction of the longitudinal axis XX, a latching section 53 adjoins the attachment section 51.
  • a plate-shaped stopper portion 54 is provided in particular, which delimits the screw-in path of the fastening portion 51.
  • the latching portion 53 comprises a central shaft 55 which terminates in particular in a frusto-conical tip 56, wherein the tip 56 forms the smaller frusto-conical surface with its end face. In the transition region between the tip 56 and the shaft 55 z. B. two opposing spring-elastic locking arms 57 formed.
  • latching arms 57 extend in the axial direction of the longitudinal axis XX on the attachment portion 51 and extend obliquely to the longitudinal axis XX that they form an angle ⁇ of 36 ° ⁇ 3 ° together in a plane passing through the longitudinal axis XX, vertical plane.
  • the latching arms 57 each have an angle section 58 on the end, which is angled relative to the latching arms 57 in such a way that it towards the longitudinal axis XX extends.
  • a radial distance A between the ends of the latching arms 57 is greater than a radial distance B between the ends of the angle sections 58.
  • the latching connector 50 is preferably made as a plastic molding.
  • the abutment portion 54 has circumferentially advantageously two opposing flats 59, which can serve as a key surfaces for a wrench.
  • four latching connectors 50 are respectively screwed offset at 90 ° to each other on the annular flange 14a.
  • Fig. 8 is the screwed state of a latch connector 50 to recognize.
  • Fig. 10 the mounting position of an inner diffuser 26 of the diffuser unit is shown in detail, wherein in particular the locking connection between the inner diffuser 26 and the latch connector 50 can be seen.
  • the inner diffuser 26 has for this purpose in its fastening tabs 34, the holes 60, the diameter of which is matched with the radial distances A and B of the resilient latching arms 57 that the latching arms 50 are pressed radially through the respective hole 60 when pushing through the latching connector 50 and spring back after completion of the insertion and engage behind in this position, the edge region of the holes 60.
  • angle portions 58 With the existing at their ends angle portions 58 they lie with their outer surfaces on the inner edge of the holes 60 under pretension.
  • the angle sections 58 have here such an inclination to the longitudinal axis XX that self-locking is given, so that the locking arms 57 can not be moved due to occurring force in the case of operation from the mounting detent position.
  • a release is possible only by a manual compression of the latching arms 57. Tolerance deviations between the components can be compensated for by means of the angular sections 58, which bear against the inner edge of the respective hole 60 with prestress in the assembly position.
  • the axial height of the plate-shaped stop portion 54 is less than the depth of the respective hole 60 in the mounting tabs 34 of the inner diffuser 26th
  • a further embodiment of a housing according to the invention is shown in partial view.
  • the wall ring 2 protrudes with its inlet nozzle section 3 into the outer diffuser 6 through its inflow opening 7, so that an overlapping area is present between the inlet nozzle section 3 and the outer diffuser 6 in the region of its adjacent to the inflow opening 7 section.
  • an axial gap 47 is formed between these two parts, can enter through the air from the outside into the interior of the outer diffuser 6.
  • the air entering through the axial gap 47 flows parallel to the air conveyed in the diffuser interior, so that there is no flow running transversely to the conveyed air, which could result in disturbing turbulences.
  • the inventive design of the housing allows that the outer diffuser 6, the inner diffuser 26, the protective grid 36 and the struts 14 can be prefabricated with the consisting of electric motor 9 and paddle wheel 11 axial fan 1 as a unit. This unit can then be fixed on site with an already preassembled wall ring 2.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)

Claims (13)

  1. Boîtier pour un ventilateur axial (1), comprenant un anneau mural (2) avec une section de buse d'entrée (3) et un diffuseur extérieur (6) annulaire relié côté sortie à l'anneau mural (2) avec une ouverture d'entrée (7) et une ouverture de sortie (8) ainsi qu'un support pour un moteur électrique (9) du ventilateur (1), qui est agencé dans un espace intérieur du boîtier, dans lequel le support est formé de plusieurs entretoises (14) pouvant être fixées avec une extrémité au niveau d'une surface circonférentielle intérieure du diffuseur extérieur (6), à distance circonférentielle, pouvant être fixées dans la zone de bord de son ouverture d'entrée (7), qui peuvent être montées avec leurs autres extrémités au niveau d'une bride de moteur (16) d'un boîtier de moteur (17) du moteur électrique (9), et dans lequel le diffuseur extérieur (6) s'élargit coniquement de son ouverture d'entrée (7) à son ouverture de sortie (8) avec un angle de cône (□) par rapport à son axe longitudinal médian (X-X),
    dans lequel un diffuseur intérieur (26), qui s'étend de l'ouverture d'entrée (7) à l'ouverture de sortie (8) et présente une paroi circonférentielle fermée (27), et qui peut être relié dans la zone de l'ouverture d'entrée (7) à la bride de moteur (16) du boîtier de moteur (17), est agencé à l'intérieur du diffuseur extérieur (6), dans lequel le boîtier de moteur (17) du moteur électrique (9) peut être reçu dans l'espace intérieur du diffuseur intérieur (26), et dans lequel une grille de protection (36), qui est reliée avec son bord circonférentiel extérieur (37) au diffuseur extérieur (6), est fixée dans un plan d'ouverture s'étendant perpendiculairement à l'axe longitudinal (X-X) de l'ouverture de sortie (8), dans lequel le diffuseur extérieur (6) présente dans sa paroi circonférentielle dans la zone de l'ouverture de sortie (8), des évidements (41) pour la réception de fils de grillage (38) de la grille de protection (36),
    caractérisé en ce que le diffuseur extérieur (6) est formé d'au moins deux sections d'anneau partiel (12), qui sont reliées par des moyens de liaison mécaniques (13) au niveau de sa surface circonférentielle extérieure, dans lequel des surfaces murales (31) du diffuseur intérieur (26) disposent au niveau de leurs extrémités libres dans la zone de bord, des évidements (44) pour la réception des fils de grillage (38) et le diffuseur intérieur (26) dispose d'un couvercle de fermeture (43), qui repose sur la grille de protection (36) sur son côté tourné dans la direction de sortie et est relié à une section de conduite d'air (29) par le biais de moyens de fixation de sorte que la grille de protection (36) est enfermée entre le couvercle de fermeture (43) et la section de conduite d'air (29), dans lequel le diffuseur intérieur (26) peut être relié à la bride de moteur (16) par le biais d'une liaison enfichable (50, 60), dans lequel de préférence la liaison enfichable est formée de plusieurs connecteurs d'arrêt (50), qui sont fixés au niveau d'une bride annulaire (14a) reliant côté extrémité les entretoises (14), dans lequel les connecteurs d'arrêt (50) se composent respectivement d'un crochet d'encliquetage.
  2. Boîtier selon la revendication 1,
    caractérisé en ce que le diffuseur extérieur (6) est formé de quatre sections d'anneau partiel (12).
  3. Boîtier selon la revendication 1 ou 2,
    caractérisé en ce que quatre entretoises espacées (14), qui se composent en particulier respectivement de deux rayons parallèles, sont présentes.
  4. Boîtier selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce que le diffuseur extérieur (6) s'élargit coniquement de l'ouverture d'entrée (7) à section transversale circulaire à l'ouverture de sortie (8) à section transversale circulaire avec l'angle de cône (□) par rapport à l'axe longitudinal médian (X-X) de 10° à 18°, en particulier 12° à 15°.
  5. Boîtier selon l'une quelconque des revendications 1 à 4,
    caractérisé en ce que le diffuseur extérieur (6) est fabriqué en plastique.
  6. Boîtier selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que le diffuseur extérieur (6) dispose d'une hauteur (L) mesurée en direction de l'axe longitudinal (X-X) au-dessus de pales agencées dans l'anneau mural (2) de la roue à pales (11) du ventilateur axial (1), qui est supérieure/égale à 200 mm jusque 800 mm compris, pour un rapport L/D1 de 0,25 à 1,0, de préférence 0,25 à 0,8, dans lequel D1 est le diamètre de l'ouverture d'entrée (7).
  7. Boîtier selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce que la paroi circonférentielle (27) présente dans la zone de liaison pour la bride de moteur (16) une section annulaire, à section transversale circulaire (28), qui se transforme en la section de conduite d'air (29) avec une section transversale en particulier carrée, dans lequel ses coins (32) sont de préférence arrondis, dans lequel de préférence la section de conduite d'air (29), partant de la section annulaire (28), présente une surface de sortie (A2i) variant par rapport à l'extrémité opposée, dans lequel la variation de surface optimale (□AI) par rapport à sa surface d'entrée (A1I) est déterminée via un facteur d'élargissement (k) avec k = D 1 + 2 × L × tan α 2 − D 1 2 − d 1 2 × L D 1 − 0,45 × L D 1 2 + 1 − d 1 2 × L
    Figure imgb0007
     et la formule Δ A i = A 2 ⁢ i − A 1 ⁢ i = π × d 1 + k × L × k × L
    Figure imgb0008
     et la surface de sortie (A2I) ainsi déterminée de la section de conduite d'air (29) se distingue au maximum de 20 % de la valeur optimale déterminée, dans lequel (A1I) est la surface d'ouverture du diffuseur intérieur (26) au début de sa section (28), et (A2I) la surface d'ouverture du diffuseur intérieur (26) au niveau de son extrémité adjacente à la grille de protection (36).
  8. Boîtier selon l'une quelconque des revendications 1 à 7,
    caractérisé en ce que l'anneau mural (2), le diffuseur extérieur (6) et les entretoises (14) peuvent être fixés par le biais de moyens de fixation (18, 19, 21, 22, 23), dans lequel
    de préférence l'anneau mural (2) et le diffuseur extérieur (6) présentent des surfaces d'application (19, 21) s'étendant circonférentiellement dirigées respectivement radialement, qui se trouvent l'une contre l'autre à l'état monté et sont reliées aux entretoises (14) et entre elles par des moyens de fixation (22) s'étendant en direction de l'axe longitudinal (X-X).
  9. Boîtier selon l'une quelconque des revendications 1 à 8,
    caractérisé en ce que l'anneau mural (2) pénètre avec sa section de buse d'entrée (3) dans le diffuseur extérieur (6) à travers son ouverture d'entrée (7) de sorte qu'une fente axiale (47) s'étendant en direction de l'axe longitudinal médian (X-X) est générée dans une zone de chevauchement, dans lequel de préférence
    les entretoises (14) relient le diffuseur extérieur (6) et l'anneau mural (2) au boîtier de moteur (17) par des moyens de fixation s'étendant radialement à l'axe longitudinal (X-X), dans lequel de préférence
    le diffuseur extérieur (6) présente plusieurs zones de fixation (18), qui sont élargies vers l'extérieur et présentent au niveau de leurs extrémités libres un coudage (19), dans lequel l'angle (□) du coudage (19) ≥ 90° + □, avec □□= angle de cône du diffuseur extérieur (6).
  10. Boîtier selon la revendication 1,
    caractérisé en ce que le crochet d'encliquetage dispose d'une section de fixation (51) pour la fixation sur la bride annulaire (14a) et une section d'arrêt (53) s'y raccordant en direction axiale, dans lequel de préférence
    la section de fixation (51) est réalisée en tant que section à filetage extérieur avec filetage extérieur (52) agencé circonférentiellement, et/ou de préférence
    une section d'application (54) est présente entre la section de fixation (51) et la section d'arrêt (53).
  11. Boîtier selon la revendication 10,
    caractérisé en ce que la section d'arrêt (53) se compose d'un arbre (55), au niveau duquel au moins deux bras d'arrêt (57) radialement élastiques, s'étendant en direction d'un axe longitudinal (X-X) du connecteur d'arrêt (50), espacés circonférentiellement sont réalisés, qui s'étendent d'une pointe (56) de l'arbre (55) en direction de la section de fixation (51) et forment l'un avec l'autre un angle (□) de 36° ± 3° et présentent des sections d'angle (58) coudées de préférence à leurs extrémités en direction de l'axe longitudinal (X-X), dans lequel de préférence
    la pointe (56) a la forme d'un cône tronqué, dans lequel la plus petite surface de cône tronqué se trouve à l'extrémité libre de la pointe (56).
  12. Boîtier selon la revendication 11,
    caractérisé en ce que le diffuseur intérieur (26) présente dans des pattes de fixation (34) des trous (60), dont le diamètre est accordé sur des distances radiales (A, B) des bras ressort de sorte que les bras d'arrêt (57) sont comprimés radialement lors de l'enfichage du connecteur d'arrêt (50) et reprennent leur forme après la fin de l'opération d'enfichage et entrent en prise dans cette position derrière les pattes de fixation (34) dans la zone de bord des trous (60) et appliquent les sections d'angle (58) avec précontrainte sur la zone de bord formée par les trous (60), dans lequel de préférence
    les sections d'angle (58) disposent d'une telle position oblique par rapport à l'axe longitudinal (X-X) qu'il y a auto-blocage lors de l'application sur la zone de bord des trous (60).
  13. Boîtier selon la revendication 12,
    caractérisé en ce que le connecteur d'arrêt (50) est réalisé en tant que pièce moulée en plastique.
EP13717754.9A 2012-10-08 2013-04-12 Boîtier pour un ventilateur axial Active EP2904270B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13717754.9A EP2904270B1 (fr) 2012-10-08 2013-04-12 Boîtier pour un ventilateur axial

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP12187622.1A EP2716915B1 (fr) 2012-10-08 2012-10-08 Boîtier pour un ventilateur axial
EP13717754.9A EP2904270B1 (fr) 2012-10-08 2013-04-12 Boîtier pour un ventilateur axial
PCT/EP2013/057667 WO2014056630A1 (fr) 2012-10-08 2013-04-12 Carter pour un ventilateur axial

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EP2904270A1 EP2904270A1 (fr) 2015-08-12
EP2904270B1 true EP2904270B1 (fr) 2019-02-27

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US (1) US10107306B2 (fr)
EP (2) EP2716915B1 (fr)
CN (1) CN104755764B (fr)
ES (1) ES2537709T3 (fr)
HU (1) HUE026127T2 (fr)
PT (1) PT2716915E (fr)
WO (1) WO2014056630A1 (fr)

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DE102015201704A1 (de) * 2015-01-30 2016-08-04 Ebm-Papst Mulfingen Gmbh & Co. Kg Aufnahmesystem
CN104763658B (zh) * 2015-03-12 2017-04-26 福建亚伦电子电器科技有限公司 风机
DE102015205424A1 (de) * 2015-03-25 2016-09-29 Ebm-Papst Mulfingen Gmbh & Co. Kg Nachleitrad
CN105443446B (zh) * 2015-12-02 2018-04-13 珠海格力电器股份有限公司 电风扇机头锁紧结构和电风扇
CN105736480B (zh) * 2016-04-28 2020-06-02 深圳市大雅医疗技术有限公司 小型风机及其进风口降噪装置及采用该风机的呼吸机
DE102017130767A1 (de) * 2017-12-20 2019-06-27 Minebea Mitsumi Inc. Strömungsoptimierter axialer Lüfter
CN108332399A (zh) * 2018-03-07 2018-07-27 广东美的制冷设备有限公司 空调的中间风道以及空调
JP6899918B2 (ja) * 2018-03-07 2021-07-07 広東美的制冷設備有限公司Ｇｄ Ｍｉｄｅａ Ａｉｒ−Ｃｏｎｄｉｔｉｏｎｉｎｇ Ｅｑｕｉｐｍｅｎｔ Ｃｏ．，Ｌｔｄ． 空気調和機の中間ダクト及び空気調和機
DE102018004605B4 (de) * 2018-06-11 2022-09-01 Felix Müller Lüfteraufsatz zur Optimierung der Mischungsventilation
DE102022134377A1 (de) 2022-12-21 2024-06-27 Ebm-Papst Mulfingen Gmbh & Co. Kg Strömungsleitvorrichtung und Ventilatoreinheit mit der Strömungsleitvorrichtung
DE102022134376A1 (de) 2022-12-21 2024-06-27 Ebm-Papst Mulfingen Gmbh & Co. Kg Strömungsleitvorrichtung und Ventilatorvorrichtung

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Also Published As

Publication number Publication date
EP2716915B1 (fr) 2015-03-18
EP2904270A1 (fr) 2015-08-12
US20150267716A1 (en) 2015-09-24
EP2716915A1 (fr) 2014-04-09
CN104755764A (zh) 2015-07-01
US10107306B2 (en) 2018-10-23
HUE026127T2 (hu) 2016-05-30
ES2537709T3 (es) 2015-06-11
PT2716915E (pt) 2015-07-07
CN104755764B (zh) 2017-03-08
WO2014056630A1 (fr) 2014-04-17

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