EP2716916B1 - Unité de ventilateur - Google Patents

Unité de ventilateur Download PDF

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Publication number
EP2716916B1
EP2716916B1 EP13004754.1A EP13004754A EP2716916B1 EP 2716916 B1 EP2716916 B1 EP 2716916B1 EP 13004754 A EP13004754 A EP 13004754A EP 2716916 B1 EP2716916 B1 EP 2716916B1
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EP
European Patent Office
Prior art keywords
diffuser
attachment
unit according
ventilator unit
diffuser attachment
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
EP13004754.1A
Other languages
German (de)
English (en)
Other versions
EP2716916A2 (fr
EP2716916B8 (fr
EP2716916A3 (fr
Inventor
Tobias Gauss
Frieder Lörcher
Michael Stephan
Daniel SEIFRIED
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.)
Ziehl Abegg SE
Original Assignee
Ziehl Abegg SE
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 Ziehl Abegg SE filed Critical Ziehl Abegg SE
Priority to SI201332056T priority Critical patent/SI2716916T1/sl
Publication of EP2716916A2 publication Critical patent/EP2716916A2/fr
Publication of EP2716916A3 publication Critical patent/EP2716916A3/fr
Publication of EP2716916B1 publication Critical patent/EP2716916B1/fr
Application granted granted Critical
Publication of EP2716916B8 publication Critical patent/EP2716916B8/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
    • 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
    • F04D29/66—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
    • F04D29/664—Sound attenuation by means of sound absorbing material
    • 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
    • F05D2250/50—Inlet or outlet
    • F05D2250/52—Outlet

Definitions

  • the invention relates to a fan unit according to the preamble of claim 1.
  • the diffuser serves to convert the kinetic energy into pressure energy.
  • the flow cross section of the diffuser expands in the flow direction of the air flow generated by the fan.
  • an increase in the efficiency of the fan unit can be achieved with the diffuser because it can convert at least part of the flow energy of the air flow into static pressure.
  • the fan can also work at a lower speed with the same air output, which reduces noise and power consumption when the fan unit is in operation.
  • the diffuser In the case of the generic fan unit ( GB 796 212 ), the diffuser consists of individual, inseparably connected sections, which surround a centrally arranged hollow body at a distance. The hollow body and the diffuser delimit an annular space that widens in the flow direction of the air to the free end of the diffuser.
  • the US 2011/0038724 A1 , the US 2011/0255239 A1 , the GB 1 196 176 A and the GB 700 872A show fan units each having a diffuser housing a fan.
  • Another fan unit is known ( U.S. 1,752,427 ) having an acceleration cone and a diffuser located on opposite sides of a wall and secured to the wall with radial flanges abutting.
  • the invention is based on the object of designing the generic fan unit in such a way that the static efficiency of the fan is increased and the fan noise is reduced.
  • the diffuser is an integral part of the inlet nozzle and is provided with at least one interface to which the diffuser attachment can be connected with at least one interface.
  • the diffuser attachment With the diffuser attachment, the flow cross-section for the air flow generated by the fan is expanded.
  • the axial component of the flow velocity is correspondingly reduced and the dynamic energy is thereby converted into usable pressure energy.
  • the static efficiency of the fan can be significantly increased in this way.
  • the fan can be operated at a low speed without impairing the air performance.
  • the fan unit according to the invention therefore works with only very little operating noise. Since the diffuser attachment and the diffuser are provided with the interfaces, the diffuser attachment can easily be retrofitted to the user's fan unit. Since the inner wall of the diffuser attachment forms a continuous continuation of the inner wall of the diffuser, the air flow is optimal.
  • the diffuser attachment is detachably connected to the diffuser.
  • the diffuser attachment can then also be removed from the diffuser by the user if necessary or, for example, replaced with a new diffuser attachment in the event of a repair.
  • the interface of the diffuser attachment can advantageously be a circumferential radial flange. It allows easy connection of the diffuser attachment to the diffuser.
  • the diffuser attachment can, for example, with the interface of the diffuser can be connected by rivets, screws, clips and the like.
  • the interface is formed by at least one plug-in part that can be plugged onto the interface of the diffuser.
  • the shell of the diffuser attachment consists of at least two shell sections which are connected to one another by form-fitting parts.
  • the plug-on process can be carried out very easily.
  • one jacket section is plugged onto the interface of the diffuser with its plug-in part.
  • the plug-in part of the other casing section is then pushed onto the diffuser interface, with the form-fitting parts of the casing sections engaging with one another.
  • These form-fit parts are designed in such a way that the form-fit is provided in the circumferential direction of the jacket, but that the form-fit parts can be joined together transversely to the circumferential direction.
  • the diffuser attachment is provided with at least one soundproofing layer.
  • Such a sound-damping layer is advantageously provided on the inside of the jacket of the diffuser attachment. This reduces the sound near the source.
  • the diffuser attachment has a circular cross-section over at least part of its height.
  • the generatrix of the jacket of the diffuser attachment can be straight or else curved. In the case of a curved course, the generatrix can be curved convexly or concavely.
  • At least the outlet opening of the diffuser attachment has an out-of-round, in particular an angular outline.
  • This angular design makes it possible to place several diffuser attachments next to each other with only a small distance, so that in devices where there is only limited space and several diffuser attachments are required, these can be arranged directly next to each other in one or more rows.
  • outlet opening of the diffuser attachment has a square outline
  • adjacent diffuser attachments can be positioned with their respective outlined sides either abutting or next to and behind one another with only the slightest distance. As a result, the area is optimally used to delay the flow rate.
  • the jacket can have a triangular, square, hexagonal or other polygonal outline at least at the outlet opening.
  • the quadrangular outline is advantageous here if the mounting surface of the device has a corresponding quadrangular outline.
  • the diffuser attachment has a circular cross-section in the area of its interface, which transitions into a non-round, in particular angular, cross-section as the distance from the interface increases. This makes it possible to connect the diffuser attachment to conventional diffusers of fan units, the interface of which is generally designed to be round or circular.
  • the diffuser attachment is provided with at least one further peripheral wall, which is surrounded at a distance from the shell of the diffuser attachment. This further wall results in optimal flow conditions.
  • the side walls of the casing of the diffuser attachment advantageously merge into one another in a curved manner. This results in an optimal guidance for the air flow and thus good flow conditions.
  • transitions between the side walls of the casing of the diffuser attachment advantageously have a twist or twist in the vertical direction.
  • the transitions do not run along a straight line in the height direction of the mantle, but are correspondingly curved.
  • transition areas are designed in such a way that they follow the flow direction of the air in the diffuser attachment or the swirl of the air flow behind the impeller of the fan. This results in only minimal losses in the area of these transitions.
  • a further reduction in the operating noise of the fan unit results in an advantageous manner if the casing of the diffuser attachment consists of foamed material.
  • the diffuser is advantageously provided with a guide wheel that has guide vanes or webs.
  • the diffuser is advantageously formed in one piece together with the guide vane, preferably made of plastic.
  • the inlet nozzle with its jacket sections, the guide vane, a receptacle and interfaces is designed in one piece, preferably made of plastic.
  • a trailing edge of the diffuser attachment is profiled, preferably jagged or corrugated.
  • the air flow emerging from the outlet opening of the diffuser attachment is divided into individual partial flows, which further reduces noise development during use.
  • the diffuser attachment can consist of at least two sections that can be axially connected to one another. This makes it possible to very easily produce diffuser attachments of different heights by axially joining the sections together.
  • the device 2 is a standing device, but it can also be a device mounted on a wall, a ceiling and the like. It has at least one fan unit. In the exemplary embodiment shown, two rows of fan units arranged one behind the other with a small spacing are provided. The fan unit has a fan 3 and a diffuser 4 ( 3 ).
  • a diffuser attachment 22 is placed on their diffuser 4 ( 2 ), which minimizes exit losses.
  • the diffusers 4, 22 convert the velocity of the exiting air into pressure.
  • the fan units are arranged on the rectangular upper side 5 of the housing 1.
  • the diffuser attachments 22 have a square outline so that the rectangular area of the upper side 5 is optimally utilized. This square shape leads to a large exit surface for the exiting air for a given surface area of the housing top 5. Flow separation is also prevented by such a design. Due to their square shape, the diffuser attachments 22 can be arranged next to one another in such a way that their adjacent edges touch one another, as is shown in 2 can be seen. Such a design of the device 2 results in a particularly high increase in efficiency.
  • the diffuser attachments 22 do not have to have a square outline, but can also have a circular outline, for example.
  • the fans 3 can be axial, diagonal or centrifugal fans.
  • An axial fan 3 is shown in each of the exemplary embodiments. It has wings 7 protruding from a hub 6, which extend over the circumference of the hub 6 are arranged at regular or irregular intervals and extend close to a wall section 8 of an inlet nozzle 43 .
  • the space enclosed by the wall section 8 tapers in the flow direction of the intake air.
  • the blades 7 may be of any suitable shape, preferably set (the blade angle is not constant).
  • the wings 7 can be provided with winglets 9, which can extend only over a part or over the entire width of the wing 7.
  • the winglets 9 can be provided only on the suction side or also only on the pressure side of the wings 7. It is also possible for the winglets 9 to extend both to the suction side and to the pressure side.
  • the winglets 9 can have a constant or different height over their length, depending on the application of the fan 3.
  • the rear edges 10 in the direction of rotation of the fan are advantageously provided with teeth 11, which can be provided over the entire length or also only over part of the length of the rear edge 10.
  • the leading edge 12 of the wings 7 in the direction of rotation is advantageously crescent-shaped.
  • the fan 3 is located within the space enclosed by the wall section 8 .
  • the hub 6 is seated on a motor shaft (not shown) of a drive motor 13 which is housed in a receptacle 14 . It is attached to the inside of a wall section 16 of the inlet nozzle 43 via a guide wheel 15 .
  • the guide wheel 15 consists in a known manner of guide vanes or webs 17 (hereinafter referred to as guide vanes) arranged at a distance from one another, which are arranged distributed over the circumference of the receptacle 14 and fastened in a suitable manner on the outside of the receptacle 14 and on the inside of the wall section 16 are.
  • the guide vanes 17 are designed in such a way that they do not impede the air sucked in by the fan 3 via the inlet opening 18 of the inlet nozzle 43 and take the swirl out of the flow.
  • the wall section 16 widens conically in the flow direction of the air and forms thus the diffuser 4. It is an integral part of the inlet nozzle 43.
  • the receptacle 14 with the guide wheel 15 is located completely within the flow space enclosed by the wall section 16.
  • the free edges 19 and 20 of the two wall sections 8, 16 can each be thickened and thereby form fastening edges or interfaces. With the edge 19, the diffuser 4 is attached in a known manner to the respective device or the respective unit.
  • a circumferential radial flange 21 (interface) is provided on the outside of the inlet nozzle 43, which contributes to stiffening the inlet nozzle 43 and is advantageously formed in one piece with the nozzle wall.
  • the inlet nozzle 43 with the jacket sections 8, 16, the guide wheel 15, the receptacle 14, the edges 19, 20 and the radial flange 21 can be made in one piece, advantageously made of plastic.
  • an outwardly extending radial flange 49 which can be provided on the diffuser attachment 22 is shown with dashed lines at the level of the outlet opening 26 .
  • the radial flange 49 like the fastening flange 23, forms an interface of the diffuser attachment 22 at the opposite end.
  • the free edge 20 of the wall section 16 of the diffuser 4 serves as a fastening flange or interface for the diffuser attachment 22, the flow cross-section of which advantageously continuously widens in the direction of flow of the air conveyed by the fan 3. In particular, this reduces the axial component of the flow velocity and thus converts the corresponding dynamic energy into usable pressure energy.
  • the volume flow can be advantageously increased by the diffuser attachment 22, particularly in the lower pressure range.
  • the diffuser attachment 22 is designed as a retrofit part that can be easily attached to existing diffusers.
  • the diffuser attachment 22 is provided at its end facing the diffuser 4 with a peripheral radial attachment flange 23 as an interface with which the diffuser attachment 22 can be attached resting on the edge 20 of the diffuser 4 .
  • the diffuser attachment 22 is detachably connected to the diffuser 4 .
  • the diffuser attachment 22 is designed in such a way that its conical inner wall 24 forms a continuous continuation of the conical inner wall 25 of the jacket section 16 of the diffuser 4 . This ensures a constant transition between the diffuser 4 and the diffuser attachment 22 for the air flow.
  • the diffuser attachment 22 has approximately the same axial length as the inlet nozzle 43.
  • the receptacle 14 and the guide wheel 15 do not protrude into the diffuser attachment 22, so that the air within the diffuser attachment 22 can flow to the outlet opening 26 of the diffuser attachment 22 in an optimized, loss-free manner.
  • the diffuser attachment 22 can be made of any suitable material, for example plastic, a metallic material such as aluminum or steel, or a foam material.
  • a further increase in the efficiency of the fan unit is achieved by the diffuser attachment 22;
  • the best effect is achieved in particular in devices with low pressure losses (high volume flows). If the diffuser attachment 22 is preferably detachably connected to the diffuser 4, the user can easily remove the diffuser attachment 22 or attach it to the diffuser 4 if necessary.
  • the diffuser attachment 22 according to 4 differs from the previous embodiment in that it has a peripheral intermediate wall 27 which is at a distance from the jacket 28 of the diffuser attachment 22 .
  • An annular passage 29 for the air is formed between the two walls 27, 28.
  • the free ends of the two peripheral partitions 27, 28 lie in a common plane. These can also be of different heights. While the jacket 28 is straight in axial section, the intermediate wall 27 is concavely curved in axial section.
  • the intermediate wall 27 extends from the receptacle 14, to whose peripheral jacket 30 it is connected.
  • the casing 28 and the intermediate wall 27 are designed in such a way that their outline increases, preferably increases steadily, in the direction of the free end. As a result, the casing 28 and the intermediate wall 27 have the largest circumference at the free end.
  • the cross section of the annular passage 29 decreases towards the outlet opening 26 .
  • the intermediate wall 27 and the jacket 28 can also be designed in such a way that the flow cross section of the passage 29 in the direction of the outlet opening 26 is constant or increases. If the flow cross-section remains the same, the intermediate wall 27 is parallel to the jacket 28 over its height.
  • the free ends of the intermediate wall 27 and the casing 28 lie in a common plane.
  • the intermediate wall 27 can also be lower or higher than the shell 28.
  • the intermediate wall 27 Since the intermediate wall 27 is attached to the jacket 30 of the receptacle 40, the intermediate wall 27 does not have to be additionally supported on the jacket 28 by cross braces and the like.
  • the connection of the intermediate wall 27 to the jacket 30 is designed to be airtight, so that the air sucked in by the fan 3 only flows through the passage 29 .
  • the diffuser attachment 22 can also be designed in such a way that it has at least one further annular intermediate wall ( 14 ), so that at least one further flow passage for the air is formed.
  • the jacket 28 and the intermediate walls are each at a distance from one another.
  • the jacket 28 and the intermediate walls can run at least approximately parallel to one another over their height. Depending on the flow conditions, they can also be designed in such a way that they do not extend parallel to one another.
  • the casing 28 and the intermediate walls can also have not only the same height, but also different heights.
  • FIG 5 shows an embodiment in which the casing 28 of the diffuser attachment 22 is provided with a sound-damping layer 31 on its inside.
  • a sound-damping layer 31 Any material suitable for this purpose can be used as the sound-absorbing material, such as rock wool or open-pored material, for example foams.
  • the soundproofing layer 31 is advantageously provided over the entire circumference of the jacket 28 and also advantageously over its entire height. With the soundproofing layer 31, the noise generated during operation of the fan unit can be further reduced. Otherwise, the diffuser attachment 22 is of the same design as the exemplary embodiment according to FIG 3 .
  • the diffuser attachment 22 according to 6 is characterized in that its jacket 28 consists of foamed material. As a result, the casing 28 contributes to noise reduction when the fan unit is used.
  • the shell 28 is provided at its end facing the fastening edge 20 of the diffuser 4 with depressions 32 which are distributed over the circumference of the shell 28 and are open in the direction of the fastening edge 20 .
  • Fastening means (not shown), such as screws, with which the diffuser attachment 22 can be fastened to the fastening edge 20 , are located at the level of the depressions 32 .
  • the depressions 32 are sufficient large, so that the fasteners can be easily operated with an appropriate tool.
  • the jacket 28 is curved outwards in axial section.
  • the jacket 28 made of foamed material can also run obliquely outwards in an axial section or be curved inwards.
  • the jacket 28 of the diffuser attachment 22 consists of individual jacket sections 28a to 28c, which are connected to one another via a plug connection 33.
  • the individual wall sections 28a to 28c are provided with a form-fitting depression 34 on one edge and with a corresponding projection 35 on the other edge.
  • the recesses 34 and projections 35 are formed so that they cannot be detached from each other in the circumferential direction of the shell 28 .
  • the depressions 34 are provided with corresponding undercuts.
  • the plug connections 33 can also be designed as dovetail groove connections.
  • the diffuser attachment 22 can be simply slipped onto the edge 20 of the diffuser 4 radially from the outside.
  • the casing sections are provided with a plug-in part 36 which is U-shaped in axial section and extends over the circumferential length of the respective casing section.
  • the plug-in part 36 surrounds the edge 20 radially from the outside.
  • the edge 20 is advantageously provided with a thin, radially projecting, circumferential web 37 onto which the plug-in part 36 can be easily attached.
  • the plug-in part 36 is advantageously designed in one piece with the jacket 28 . But it can also be attached to the jacket 28, for example be welded.
  • the depressions 34 and projections 35 are designed in such a way that they can be joined together transversely to the circumferential direction of the shell 28 .
  • the diffuser attachment 22 is designed in the same way as the exemplary embodiment according to FIG 3 .
  • the diffuser attachment 22 according to 8 is also designed the same as the embodiment 3 .
  • the diffuser attachment is provided with a touch guard 38 which can be provided in different positions on the diffuser attachment 22 .
  • three possible installation positions for the contact protection 38 are shown as an example. With regard to low noise development and low pressure losses, it is advantageous if the contact protection 28 is as far away from the fan 3 as possible. An optimal installation position is therefore the arrangement of the contact protection 38 in the area of the outlet opening 26 of the diffuser attachment 22.
  • the contact protection 38 is designed in a known manner, for example formed by a wire or plastic grid. It is advantageously attached to the inner wall of the jacket 28 of the diffuser attachment 22 or placed on the back. In each installation position, the protection against contact 38 either does not project beyond the outlet opening 26 or it is in front of the outlet opening 26.
  • the protection against contact 38 can be screwed on, clipped on, riveted, welded or foamed.
  • the free edge 39 of the diffuser attachment 22 delimits the outlet opening 26 in a profiled manner.
  • the free edge 39 is sawtooth-like over its circumference.
  • the teeth 40 are advantageously of the same design and are arranged one behind the other at equal intervals over the circumference of the edge 39 . This profiling contributes to the low noise level of the fan unit.
  • the free edge 39 of the jacket 28 of the diffuser attachment 22 is profiled in a wavy manner. It is also advantageous with such a profiling that the corrugations run uniformly over the circumference of the jacket 28 .
  • the diffuser attachment 22 of the embodiments according to 9 and 10 is otherwise the same design as the embodiment 3 .
  • the profiles of the free edge 39 described can also be provided in the other embodiments of the diffuser attachment 22 .
  • Soundproofing can also be achieved by providing ribs running in the vertical direction on the inner wall 24 of the casing 28, which advantageously extend over the entire height of the casing 28 and are advantageously distributed at equal intervals over the circumference of the casing. These ribs can run in the axial direction, but can also have a slope.
  • the Figures 11 to 14 show diffuser attachments whose outlet opening has an angular outline, which is rectangular in the exemplary embodiment.
  • the cross-sectional shape of the diffuser attachment changes from a circular to an angular cross-section from the inlet area to the outlet area.
  • the attachment flange 23 has a circular outline and, as in the other exemplary embodiments described above, forms the interface with which the diffuser attachment 22 can be attached to the attachment edge 20 of the diffuser 4 .
  • the fastening flange 23 is adjoined by a wall section 41 which initially has a circular cross-section and gradually changes into a quadrangular outline as the distance from the fastening flange 23 increases.
  • the outlet opening 26 is delimited by a wall section 42 which has a rectangular or round outline in the exemplary embodiment.
  • the jacket 28 thus has a quadrangular outline over part of its height. How 11 shows, the corners of the side walls of the shell 28 are rounded. In the following, however, we continue to refer to a quadrangular outline spoken. In principle, however, it is also possible for the side walls of the casing 28 to adjoin one another with sharp edges.
  • the guide vanes 17 of the guide wheel 15 can be seen, which are attached at one end to the jacket 30 of the receptacle 14 and at the other end to the wall section 16 of the diffuser 4 .
  • the diffuser 4 is part of the inlet nozzle 43 which is fastened to a nozzle plate 44 with the free edge 19 .
  • the nozzle plate 44 has a rectangular outline.
  • the outline of the diffuser attachment 22 advantageously corresponds to the outline of the nozzle plate 44 in the area of the outlet opening 26.
  • the nozzle plate 44 and/or the outlet opening 26 can have the most varied outline shapes, for example square, rectangular, hexagonal or triangular outline shape.
  • transitions between the side walls of the shell 28 can be at an angle to the respective radial line of the diffuser attachment. These transitions between the side walls are indicated by the lines 45. The transitions are linear.
  • these transitions 45 between the side walls of the casing 28 in the angular cross-sectional area can also be curved (twisted) over their height.
  • the curvature is provided in such a way that the transitions 45 have a twist and follow the flow direction of the air behind the fan 3 .
  • the transition areas 45 enclose an angle over their length with a radial line 46 of the diffuser attachment 22 which runs through the rounded corner of the jacket 28 .
  • the transitions 45 extend approximately from the outlet opening 26 to close to the fastening flange 23 of the diffuser attachment 22.
  • FIG. 14 shows an example of a diffuser attachment 22 which, in addition to the casing 28 and the inner wall 27, has a peripheral intermediate wall 47.
  • the walls 27, 28, 47 are at a distance from one another over their entire circumference, preferably at the same distance.
  • passages 29, 48 are formed between the individual walls. The air sucked in by the fan 3 enters the two passages 29, 48, each of which runs in the form of a ring.
  • the inner wall 27 can be fixedly connected to the intermediate wall 47 in a suitable manner, for example.
  • the walls 27, 28, 47 run at least approximately parallel to one another. Depending on the application of the fan unit, however, the walls can also be provided in such a way that they do not run parallel to one another.
  • the walls 27, 28, 47 advantageously have the same height.
  • the walls can also be of different heights. The height of the walls can increase or decrease from the outside to the inside. However, two of the walls can also be of the same height and the third wall can be higher or shorter than the other two walls. The most favorable flow ratio can thus be set by selecting the height of the individual walls.
  • All three walls 27, 28, 47 are designed in such a way that they have a circular cross-section in the area where they connect to the diffuser 4, which cross-section then continuously transitions into the angular cross-section of the individual walls.
  • the transitions 45 between the sides of the walls are curved over their length, similar to the diffuser attachment 22 according to FIG 13 . It is of course possible to provide the winding transitions 45 on only one wall or on two walls of the diffuser attachment 22. Then, in connection with the outline design of the walls 27, 28, 47, an optimal adaptation to the respectively desired flow conditions can be achieved.
  • transitions 45 can also be straight, as is the case in the embodiment according to FIG 12 is provided.
  • the transitions can be in the respective radial line going through the corner of the walls lie, but also run at an angle to this radial.
  • the diffuser attachment 22 can be made relatively short if it has one or two additional walls.
  • the air conveyed by the fan 3 enters the ring-shaped passages 29, 48.
  • the flow cross section of these passages initially decreases in the direction of flow, as a result of which the air is accelerated in this area. This leads to an equalization of the air flow.
  • the air flow can then be delayed with fewer losses, resulting in a high degree of efficiency of the diffuser attachment 22 .
  • the flow cross section of the passages 29, 48 increases again in the direction of the outlet opening 26, preferably continuously.
  • the drive motor 13 is accommodated in the receptacle 14 of the diffuser 4 if it is an internal rotor motor. If an external rotor motor is used for the fan 3, then a terminal box or the corresponding electronics is arranged in the receptacle 14.
  • the diffuser 4 with the diffuser attachment 22 can be used for a wide variety of applications, for example for evaporators, condensers, air coolers, dry coolers and the like.
  • the diffuser attachment 22 is used, even more volume flow is achieved, particularly in the lower pressure range.
  • the diffuser attachment is a component that is simple and inexpensive to produce and can be retrofitted to the diffuser 4 at any time.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Cookers (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Food-Manufacturing Devices (AREA)

Claims (17)

  1. Unité de ventilateur comportant au moins un ventilateur (3) entouré d'une tuyère d'entrée (43) et un diffuseur associé au ventilateur (3),
    caractérisée en ce que le diffuseur (4) fait partie intégrante de la tuyère d'entrée (43) et que le bord libre d'une section de paroi (16) du diffuseur (4) présente une interface (20, 37) pour un embout de diffuseur (22), qui est raccordé de manière amovible à l'interface (20, 37) du diffuseur (4) avec une interface (23, 36) de telle sorte que la paroi intérieure de l'embout de diffuseur (22) forme un prolongement continu de la paroi intérieure (25) du diffuseur (4).
  2. Unité de ventilateur selon la revendication 1, caractérisée en ce que l'embout de diffuseur (22) s'évase dans le sens d'écoulement de l'air.
  3. Unité de ventilateur selon la revendication 1 ou 2, caractérisée en ce que l'interface (20) de l'embout de diffuseur (22) est une bride radiale circonférentielle.
  4. Unité de ventilateur selon la revendication 1 ou 2, caractérisée en ce que l'interface (36) de l'embout de diffuseur (22) est au moins une pièce qui peut être enfichée sur l'interface (20) du diffuseur (4).
  5. Unité de ventilateur selon la revendication 4, caractérisée en ce qu'une gaine (28) de l'embout de diffuseur (22) se compose d'au moins deux sections de gaine (28a à 28c) qui sont reliées l'un à l'autre par des pièces d'emboîtement (34, 35) qui réalisent avantageusement une conjonction de forme dans la direction circonférentielle de la gaine (28) et permettent un assemblage transversalement à la direction circonférentielle.
  6. Unité de ventilateur selon une des revendications 1 à 5, caractérisée en ce que l'embout de diffuseur (22) est pourvu d'au moins une couche d'insonorisation (31) qui est de préférence prévue sur la face intérieure d'une gaine (28) de l'embout de diffuseur (22).
  7. Unité de ventilateur selon une des revendications 1 à 6, caractérisée en ce que l'embout de diffuseur (22) présente une section circulaire sur au moins une partie de sa hauteur.
  8. Unité de ventilateur selon une des revendications 1 à 7, caractérisée en ce qu'au moins l'orifice de sortie (26) de l'embout de diffuseur (22) présente un contour non rond, notamment anguleux.
  9. Unité de ventilateur selon une des revendications 1 à 8, caractérisée en ce que l'embout de diffuseur (22) au niveau de son interface (20, 36) présente une section circulaire qui, à mesure que l'on s'éloigne de l'interface (20, 36), devient non circulaire, en particulier à section carrée.
  10. Unité de ventilateur selon une des revendications 1 à 9, caractérisée en ce que l'embout de diffuseur (22) présente au moins une autre paroi périphérique (27, 47), qui est entourée à distance de la gaine (28) de l'embout de diffuseur (22) et est avantageusement parallèle à la gaine (28) de l'embout de diffuseur (22).
  11. Unité de ventilateur selon une des revendications 1 à 10, caractérisée en ce que les parois latérales de l'enveloppe (28) de l'embout de diffuseur (22) se rejoignent de manière courbe, et qu'avantageusement les transitions (45) entre les parois latérales de l'enveloppe (28) de l'accessoire de diffuseur (22) présentent une torsion (tortillon) dans la direction verticale.
  12. Unité de ventilateur selon une quelconque des revendications 5 à 11, caractérisée en ce que la gaine (28) de l'embout de diffuseur (22) consiste en un matériau en mousse.
  13. Unité de ventilateur selon une des revendications 1 à 12, caractérisée en ce que le diffuseur (4) est muni d'une aube directrice (15) à aubes directrices ou lames (17), et que le diffuseur (4) à aube directrice (15) est configuré en un seul tenant, de préférence en matière plastique.
  14. Unité de ventilateur selon une des revendications 1 à 13, caractérisée en ce que la tuyère d'entrée (43) avec ses sections de gaine (8, 16), l'aube directrice (15), un réceptacle (14) et des interfaces (19, 20, 21) sont configurés en un seul tenant, de préférence en plastique.
  15. Unité de ventilateur selon une quelconque des revendications 1 à 14, caractérisée en ce qu'un bord de fuite (26) de l'embout de diffuseur (22), qui est avantageusement constitué d'au moins deux sections pouvant être reliées axialement l'une à l'autre, est profilé, de préférence dentelé ou ondulé.
  16. Unité de ventilateur selon une des revendications 1 à 15, caractérisée en ce que la buse d'admission (43) présente une section de paroi (8), qui présente un espace renfermant le ventilateur (3).
  17. Unité de ventilateur selon une des revendications 1 à 16, caractérisée en ce qu'un moteur d'entraînement (13) du ventilateur (3) est logé dans un réceptacle (14), qui est logé dans un espace du diffuseur (4) entouré d'une section de paroi (16).
EP13004754.1A 2012-10-05 2013-10-02 Unité de ventilateur Active EP2716916B8 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201332056T SI2716916T1 (sl) 2012-10-05 2013-10-02 Ventilatorska enota

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DE102012019795.0A DE102012019795A1 (de) 2012-10-05 2012-10-05 Ventilatoreinheit

Publications (4)

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EP2716916A2 EP2716916A2 (fr) 2014-04-09
EP2716916A3 EP2716916A3 (fr) 2014-09-10
EP2716916B1 true EP2716916B1 (fr) 2023-05-10
EP2716916B8 EP2716916B8 (fr) 2023-08-02

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EP (1) EP2716916B8 (fr)
DE (1) DE102012019795A1 (fr)
ES (1) ES2953109T3 (fr)
SI (1) SI2716916T1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102018127718A1 (de) * 2018-11-07 2020-05-07 ebm-papst AB Luftleitanordnung für eine Lüftungsanlage
DE102018128811A1 (de) * 2018-11-16 2020-05-20 Ebm-Papst Mulfingen Gmbh & Co. Kg Variabel mit unterschiedlichen Düsen kombinierbarer Diagonalventilator
DE102021107361A1 (de) 2021-03-24 2022-09-29 Ebm-Papst St. Georgen Gmbh & Co. Kg Mehrstufiger Axiallüfter
CN113623249B (zh) * 2021-08-26 2022-10-28 西安交通大学 一种采用矩形出口扩散筒内设隔板的并联式高效轴流风机

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GB1196176A (en) * 1966-08-05 1970-06-24 Chiyoda Chem Eng Construct Co Silencers for Axial - Flow Fluid Fans

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US1940790A (en) * 1930-10-18 1933-12-26 Walter S Diehl Fluid conducting passage
GB796212A (en) * 1955-10-12 1958-06-04 Stork Koninklijke Maschf Improvements in and relating to axial flow fans or axial flow pumps
JPS5115210A (en) * 1974-07-02 1976-02-06 Rotoron Inc Zatsuongenshono fuan
DE3515441A1 (de) * 1985-04-29 1986-10-30 Dieter Prof. Dr.-Ing. 7500 Karlsruhe Wurz Ventilatorkuehler
FR2728028B1 (fr) * 1994-12-07 1997-03-14 Sardou Max Dispositif pour transformer l'energie mecanique d'un moteur en une mise sous pression d'un gaz
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EP2545285B1 (fr) * 2010-03-08 2016-12-28 Robert Bosch GmbH Tuyère de ventilateur de refroidissement axial
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DE102011015784A1 (de) * 2010-08-12 2012-02-16 Ziehl-Abegg Ag Ventilator
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GB1196176A (en) * 1966-08-05 1970-06-24 Chiyoda Chem Eng Construct Co Silencers for Axial - Flow Fluid Fans

Also Published As

Publication number Publication date
DE102012019795A1 (de) 2014-04-10
ES2953109T3 (es) 2023-11-08
EP2716916A2 (fr) 2014-04-09
EP2716916B8 (fr) 2023-08-02
EP2716916A3 (fr) 2014-09-10
SI2716916T1 (sl) 2023-10-30

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