EP2716916B1 - Ventilator unit - Google Patents

Ventilator unit Download PDF

Info

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
Authority
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)
French (fr)
Other versions
EP2716916A2 (en
EP2716916A3 (en
EP2716916B8 (en
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/en
Publication of EP2716916A2 publication Critical patent/EP2716916A2/en
Publication of EP2716916A3 publication Critical patent/EP2716916A3/en
Publication of EP2716916B1 publication Critical patent/EP2716916B1/en
Application granted granted Critical
Publication of EP2716916B8 publication Critical patent/EP2716916B8/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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.

Landscapes

  • 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)

Description

Die Erfindung betrifft eine Ventilatoreinheit nach dem Oberbegriff des Anspruches 1.The invention relates to a fan unit according to the preamble of claim 1.

Bei solchen Ventilatoreinheiten dient der Diffusor dazu, die kinetische Energie in Druckenergie umzuwandeln. Zu diesem Zweck erweitert sich der Strömungsquerschnitt des Diffusors in Strömungsrichtung des vom Ventilator erzeugten Luftstromes. Ferner kann mit dem Diffusor eine Wirkungsgradsteigerung der Ventilatoreinheit erzielt werden, weil er zumindest einen Teil der Strömungsenergie des Luftstromes in statischen Druck umwandeln kann. Auch kann der Ventilator mit einer geringeren Drehzahl bei gleicher Luftleistung arbeiten, wodurch die Geräuschentwicklung und Leistungsaufnahme beim Betrieb der Ventilatoreinheit verringert wird.In such fan units, the diffuser serves to convert the kinetic energy into pressure energy. For this purpose, the flow cross section of the diffuser expands in the flow direction of the air flow generated by the fan. Furthermore, 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.

Bei der gattungsgemäßen Ventilatoreinheit ( GB 796 212 ) besteht der Diffusor aus einzelnen, unlösbar miteinander verbundenen Abschnitten, die einen mittig angeordneten Hohlkörper mit Abstand umgeben. Der Hohlkörper und der Diffusor begrenzen einen Ringraum, der sich in Strömungsrichtung der Luft bis zum freien Ende des Diffusors erweitert.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.

Die US 2011/0038724 A1 , die US 2011/0255239 A1 , die GB 1 196 176 A und die GB 700 872 A zeigen Ventilatoreinheiten, die jeweils einen Diffusor aufweisen, in dem ein Ventilator untergebracht ist.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.

Es ist eine weitere Ventilatoreinheit bekannt ( US 1 752 427 ), die einen Beschleunigungskonus und einen Diffusor aufweist, die auf einander gegenüberliegenden Seiten einer Wand angeordnet und mit Radialflanschen an der Wand anliegend befestigt sind.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.

Der Erfindung liegt die Aufgabe zugrunde, die gattungsgemäße Ventilatoreinheit so auszubilden, dass der statische Wirkungsgrad des Ventilators erhöht und das Ventilatorgeräusch verringert werden.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.

Diese Aufgabe wird bei der gattungsgemäßen Ventilatoreinheit erfindungsgemäß mit den kennzeichnenden Merkmalen des Anspruches 1 gelöst.In the case of the generic fan unit, this object is achieved according to the invention with the characterizing features of claim 1 .

Bei der erfindungsgemäßen Ventilatoreinheit ist der Diffusor integrierter Bestandteil der Einlaufdüse und mit der wenigstens einen Schnittstelle versehen, an die der Diffusoraufsatz mit wenigstens einer Schnittstelle angeschlossen werden kann. Mit dem Diffusoraufsatz wird der Strömungsquerschnitt für den vom Ventilator erzeugten Luftstrom erweitert. Dadurch wird insbesondere die Axialkomponente der Strömungsgeschwindigkeit entsprechend verringert und dadurch die dynamische Energie in nutzbare Druckenergie umgewandelt. Der statische Wirkungsgrad des Ventilators kann auf diese Weise wesentlich erhöht werden. Dabei kann der Ventilator mit einer geringen Drehzahl ohne Beeinträchtigung der Luftleistung betrieben werden. Die erfindungsgemäße Ventilatoreinheit arbeitet darum auch mit nur sehr geringem Betriebsgeräusch. Da der Diffusoraufsatz und der Diffusor mit den Schnittstellen versehen sind, lässt sich der Diffusoraufsatz vom Anwender einfach nachträglich an seiner Ventilatoreinheit anbringen. Da die Innenwand des Diffusoraufsatzes eine stetige Fortsetzung der Innenwand des Diffusors bildet, ergibt sich eine optimale Luftströmung.In the fan unit according to the invention, 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. With the diffuser attachment, the flow cross-section for the air flow generated by the fan is expanded. As a result, in particular 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.

Der Diffusoraufsatz ist lösbar mit dem Diffusor verbunden. Dann kann der Diffusoraufsatz vom Anwender bei Bedarf auch vom Diffusor abgenommen oder beispielsweise in einem Reparaturfall durch einen neuen Diffusoraufsatz ersetzt werden.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.

Die Schnittstelle des Diffusoraufsatzes kann in vorteilhafter Weise ein umlaufender Radialflansch sein. Er erlaubt einen einfachen Anschluss des Diffusoraufsatzes an den Diffusor. Der Diffusoraufsatz kann beispielsweise mit der Schnittstelle des Diffusors durch Nieten, Schrauben, Klipse und dergleichen verbunden werden.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.

Bei einer anderen vorteilhaften Ausführungsform wird die Schnittstelle durch wenigstens einen Steckteil gebildet, der sich auf die Schnittstelle des Diffusors aufstecken lässt.In another advantageous embodiment, the interface is formed by at least one plug-in part that can be plugged onto the interface of the diffuser.

Bei einer solchen Ausbildung ist es von Vorteil, wenn der Mantel des Diffusoraufsatzes aus wenigstens zwei Mantelabschnitten besteht, die durch Formschlussteile miteinander verbunden werden. Dann ist der Aufsteckvorgang sehr einfach durchführbar. Es wird zuerst der eine Mantelabschnitt mit seinem Steckteil auf die Schnittstelle des Diffusors aufgesteckt. Anschließend wird der andere Mantelabschnitt mit seinem Steckteil auf die Diffusorschnittstelle aufgesteckt, wobei die Formschlussteile der Mantelabschnitte miteinander in Eingriff kommen. Diese Formschlussteile sind so ausgebildet, dass der Formschluss in Umfangsrichtung des Mantels gegeben ist, dass die Formschlussteile jedoch quer zur Umfangsrichtung zusammengefügt werden können.With such a design, it is advantageous if the shell of the diffuser attachment consists of at least two shell sections which are connected to one another by form-fitting parts. Then the plug-on process can be carried out very easily. First, 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.

Um das Betriebsgeräusch der Ventilatoreinheit weiter zu verringern, ist es von Vorteil, wenn der Diffusoraufsatz mit wenigstens einer Schalldämpfungsschicht versehen ist.In order to further reduce the operating noise of the fan unit, it is advantageous if the diffuser attachment is provided with at least one soundproofing layer.

Vorteilhaft ist eine solche Schalldämpfungsschicht an der Innenseite des Mantels des Diffusoraufsatzes vorgesehen. Dadurch wird der Schall nahe der Quelle reduziert.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.

Bei einer kostengünstigen Ausführungsform hat der Diffusoraufsatz zumindest über einen Teil seiner Höhe kreisförmigen Querschnitt. Hierbei kann die Erzeugende des Mantels des Diffusoraufsatzes gerade oder auch gekrümmt verlaufen. Bei einem gekrümmten Verlauf kann die Erzeugende konvex oder konkav gekrümmt sein.In a cost-effective embodiment, the diffuser attachment has a circular cross-section over at least part of its height. In this case, 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.

Bei einer anderen Ausführungsform weist zumindest die Auslassöffnung des Diffusoraufsatzes einen unrunden, insbesondere einen eckigen Umriss auf. Diese eckige Gestaltung macht es möglich, mehrere Diffusoraufsätze mit nur geringem Abstand nebeneinander zu setzen, so dass bei Geräten, bei denen nur ein begrenztes Platzangebot vorhanden ist und mehrere Diffusoraufsätze nötig sind, diese unmittelbar nebeneinander ein- oder mehrreihig hintereinander angeordnet werden können.In another embodiment, 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.

Wenn die Auslassöffnung des Diffusoraufsatzes einen viereckigen Umriss hat, können benachbarte Diffusoraufsätze mit ihren jeweiligen Umrissseiten entweder aneinanderstoßend oder mit nur geringstem Abstand neben- und hintereinander positioniert werden. Dadurch wird die Fläche optimal zur Verzögerung der Strömungsgeschwindigkeit genutzt.If the 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.

Je nach Gestaltung der Fläche des jeweiligen Gerätes, an der die Diffusoraufsätze montiert werden sollen, kann der Mantel zumindest an der Auslassöffnung dreieckigen, viereckigen, sechseckigen oder anderen mehreckigen Umriss aufweisen. Vorteilhaft ist hierbei der viereckige Umriss, wenn die Montagefläche des Gerätes einen entsprechenden viereckigen Umriss aufweist.Depending on the design of the surface of the respective device on which the diffuser attachments are to be mounted, 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.

Vorteilhaft hat der Diffusoraufsatz im Bereich seiner Schnittstelle einen kreisförmigen Querschnitt, der mit zunehmendem Abstand von der Schnittstelle in einen unrunden, insbesondere eckigen Querschnitt übergeht. Dadurch besteht die Möglichkeit, den Diffusoraufsatz an herkömmliche Diffusoren von Ventilatoreinheiten anzuschließen, deren Schnittstelle in der Regel rund bzw. kreisförmig gestaltet ist.Advantageously, 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.

Bei einer vorteilhaften Ausführungsform ist der Diffusoraufsatz mit wenigstens einer weiteren umlaufenden Wand versehen, die mit Abstand vom Mantel des Diffusoraufsatzes umgeben ist. Durch diese weitere Wand ergeben sich optimale Strömungsverhältnisse.In an advantageous embodiment, 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.

Die Seitenwände des Mantels des Diffusoraufsatzes gehen vorteilhaft gekrümmt ineinander über. Dadurch ergibt sich eine optimale Führung für den Luftstrom und damit gute Strömungsverhältnisse.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.

Die Übergänge zwischen den Seitenwänden des Mantels des Diffusoraufsatzes weisen vorteilhaft in Höhenrichtung einen Drall bzw. eine Verwindung auf. Die Übergänge verlaufen in Höhenrichtung des Mantels nicht längs einer Geraden, sondern entsprechend gekrümmt. Diese Übergangsbereiche sind so gestaltet, dass sie der Strömungsrichtung der Luft im Diffusoraufsatz bzw. dem Drall des Luftstromes hinter dem Laufrad des Ventilators folgen. Es ergeben sich dadurch nur minimale Verluste im Bereich dieser Übergänge.The 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. These 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.

Eine weitere Verringerung des Betriebsgeräusches der Ventilatoreinheit ergibt sich in vorteilhafter Weise, wenn der Mantel des Diffusoraufsatzes aus geschäumtem Material besteht.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.

Der Diffusor ist vorteilhaft mit einem Nachleitrad versehen, das Leitschaufein oder Stege aufweist.The diffuser is advantageously provided with a guide wheel that has guide vanes or webs.

Der Diffusor ist zusammen mit dem Nachleitrad vorteilhaft einteilig ausgebildet, vorzugsweise aus Kunststoff hergestellt.The diffuser is advantageously formed in one piece together with the guide vane, preferably made of plastic.

Bei einer vorteilhaften Ausführungsform ist die Einlaufdüse mit ihren Mantelabschnitten, dem Nachleitrad, einer Aufnahme und Schnittstellen einteilig, vorzugsweise aus Kunststoff, ausgebildet.In an advantageous embodiment, the inlet nozzle with its jacket sections, the guide vane, a receptacle and interfaces is designed in one piece, preferably made of plastic.

Bei einer vorteilhaften Ausführungsform ist eine Abströmkante des Diffusoraufsatzes profiliert ausgebildet, vorzugsweise gezackt oder gewellt. Der aus der Auslassöffnung des Diffusoraufsatzes austretende Luftstrom wird dadurch in einzelne Teilströme aufgeteilt, wodurch im Einsatz die Geräuschentwicklung weiter verringert wird.In an advantageous embodiment, 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.

Der Diffusoraufsatz kann aus wenigstens zwei axial aneinander anschließbaren Abschnitten bestehen. Dadurch besteht die Möglichkeit, durch axiales Aneinanderfügen der Abschnitte unterschiedlich hohe Diffusoraufsätze sehr einfach herstellen zu können.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.

Der Anmeldungsgegenstand ergibt sich nicht nur aus dem Gegenstand der einzelnen Patentansprüche, sondern auch durch alle in den Zeichnungen und der Beschreibung offenbarten Angaben und Merkmale. Sie werden, auch wenn sie nicht Gegenstand der Ansprüche sind, als erfindungswesentlich beansprucht, soweit sie einzeln oder in Kombination gegenüber dem Stand der Technik neu sind.The subject matter of the application results not only from the subject matter of the individual patent claims, but also from all the information and features disclosed in the drawings and the description. Even if they are not the subject of the claims, they are claimed to be essential to the invention insofar as they are new compared to the prior art, either individually or in combination.

Weitere Merkmale der Erfindung ergeben sich aus den weiteren Ansprüchen, der Beschreibung und den Zeichnungen.Further features of the invention emerge from the further claims, the description and the drawings.

Die Erfindung wird nachstehend anhand einiger in den Zeichnungen dargestellter Ausführungsformen näher erläutert. Es zeigen

Fig. 1
in perspektivischer und schematischer Darstellung auf einem Gehäuse angeordnete Ventilatoren nach dem Stand der Technik,
Fig. 2
in einer Darstellung entsprechend Fig. 1 ein Gerät mit erfindungsgemäßen Ventilatoreinheiten,
Fig. 3 bis Fig. 10
jeweils im Axialschnitt verschiedene Ausführungsbeispiele von erfindungsgemäßen Ventilatoreinheiten,
Fig. 11 bis Fig. 13
jeweils in perspektivischer Darstellung weitere Ausführungsbeispiele von erfindungsgemäßen Ventilatoreinheiten,
Fig. 14
eine Ansicht einer weiteren Ausführungsform einer erfindungsgemäßen Ventilatoreinheit.
The invention is explained in more detail below with reference to some embodiments shown in the drawings. Show it
1
a perspective and schematic representation of fans arranged on a housing according to the prior art,
2
in a representation accordingly 1 a device with fan units according to the invention,
Figures 3 to 10
each in axial section different embodiments of fan units according to the invention,
Figures 11 to 13
each in a perspective representation of further exemplary embodiments of fan units according to the invention,
14
a view of a further embodiment of a fan unit according to the invention.

Fig. 1 zeigt in schematischer Darstellung ein Gehäuse 1 eines Gerätes 2, das beispielhaft ein Wärmetauscher ist. Das Gerät 2 ist im Ausführungsbeispiel ein Standgerät, kann aber auch ein an einer Wand, einer Decke und dergleichen montiertes Gerät sein. Es weist mindestens eine Ventilatoreinheit auf. Im dargestellten Ausführungsbeispiel sind zwei Reihen mit geringem Abstand hintereinander angeordnete Ventilatoreinheiten vorgesehen. Die Ventilatoreinheit hat einen Ventilator 3 und einen Diffusor 4 (Fig. 3). 1 shows a schematic representation of a housing 1 of a device 2, which is an example of a heat exchanger. In the exemplary embodiment, 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 ).

Damit die Ventilatoren 3 die Luft nicht frei ausblasen, wird auf ihren Diffusor 4 jeweils ein Diffusoraufsatz 22 aufgesetzt (Fig. 2), durch den Austrittsverluste minimiert werden. Die Diffusoren 4, 22 wandeln die Geschwindigkeit der austretenden Luft in Druck um. Die Ventilatoreinheiten sind an der rechteckigen Oberseite 5 des Gehäuses 1 angeordnet. Damit die Rechteckfläche der Oberseite 5 optimal ausgenutzt wird, haben die Diffusoraufsätze 22 viereckigen Umriss. Diese Viereckform führt zu einer großen Austrittsfläche für die austretende Luft bei einer vorgegebenen Fläche der Gehäuseoberseite 5. Auch wird durch eine solche Ausbildung eine Strömungsablösung verhindert. Aufgrund ihrer Viereckform können die Diffusoraufsätze 22 so nebeneinander angeordnet werden, dass sie mit ihren benachbarten Rändern einander berühren, wie dies in Fig. 2 zu erkennen ist. Bei einer solchen Ausbildung des Gerätes 2 ergibt sich eine besonders hohe Wirkungsgradsteigerung.So that the fans 3 do not blow out the air freely, 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.

Die Diffusoraufsätze 22 müssen nicht den viereckigen Umriss haben, sondern können beispielsweise auch kreisförmigen Umriss aufweisen.The diffuser attachments 22 do not have to have a square outline, but can also have a circular outline, for example.

Die Ventilatoren 3 können Axial-, Diagonal- oder Radialventilatoren sein.The fans 3 can be axial, diagonal or centrifugal fans.

In den Ausführungsbeispielen ist jeweils ein Axialventilator 3 dargestellt. Er hat von einer Nabe 6 abstehende Flügel 7, die über den Umfang der Nabe 6 in gleichmäßigen oder auch in unregelmäßigen Abständen angeordnet sind und sich bis nahe an einen Wandabschnitt 8 einer Einlaufdüse 43 erstrecken. Der vom Wandabschnitt 8 umschlossene Raum verjüngt sich in Strömungsrichtung der angesaugten Luft. Die Flügel 7 können in jeder geeigneten Form ausgebildet sein, vorzugsweise geschränkt (der Flügelwinkel ist nicht konstant) gestaltet sein. An den radialen äußeren Enden können die Flügel 7 mit Winglets 9 versehen sein, die sich nur über einen Teil oder über die gesamte Breite des Flügels 7 erstrecken können. Die Winglets 9 können nur an der Saug- oder auch nur an der Druckseite der Flügel 7 vorgesehen sein. Auch ist es möglich, dass sich die Winglets 9 sowohl zur Saug- als auch zur Druckseite hin erstrecken. Die Winglets 9 können über ihre Länge konstante oder auch unterschiedliche Höhe haben, je nach Einsatzfall des Ventilators 3.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). At the radially outer ends, 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.

Wie Fig. 3 zeigt, sind die in Drehrichtung des Ventilators rückwärtigen Kanten 10 vorteilhaft mit Zähnen 11 versehen, die über die gesamte Länge oder auch nur über einen Teil der Länge der rückwärtigen Kante 10 vorgesehen sein können. Die in Drehrichtung vordere Kante 12 der Flügel 7 ist vorteilhaft sichelförmig gestaltet.How 3 shows, 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.

Der Ventilator 3 befindet sich innerhalb des vom Wandabschnitt 8 umschlossenen Raumes. Die Nabe 6 sitzt auf einer (nicht dargestellten) Motorwelle eines Antriebsmotors 13, der in einer Aufnahme 14 untergebracht ist. Sie ist über ein Leitrad 15 an der Innenseite eines Wandabschnittes 16 der Einlaufdüse 43 befestigt. Das Leitrad 15 besteht in bekannter Weise aus mit Abstand voneinander angeordneten Leitschaufeln oder Stegen 17 (nachfolgend nur Leitschaufeln genannt), die über den Umfang der Aufnahme 14 verteilt angeordnet und an der Außenseite der Aufnahme 14 und an der Innenseite des Wandabschnittes 16 in geeigneter Weise befestigt sind. Die Leitschaufeln 17 sind strömungstechnisch so ausgebildet, dass sie die vom Ventilator 3 über die Eintrittsöffnung 18 der Einlaufdüse 43 angesaugte Luft nicht behindern und den Drall aus der Strömung herausnehmen. Der Wandabschnitt 16 erweitert sich in Strömungsrichtung der Luft konisch und bildet somit den Diffusor 4. Er ist integrierter Bestandteil der Einlaufdüse 43. Die Aufnahme 14 mit dem Leitrad 15 befindet sich vollständig innerhalb des vom Wandabschnitt 16 umschlossenen Strömungsraumes.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. In terms of flow, 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.

Die freien Ränder 19 und 20 der beiden Wandabschnitte 8, 16 können jeweils verdickt ausgebildet und bilden dadurch Befestigungsränder bzw. Schnittstellen. Mit dem Rand 19 wird der Diffusor 4 in bekannter Weise am jeweiligen Gerät oder der jeweiligen Einheit befestigt.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.

Am Übergang zwischen den beiden Wandabschnitten 8, 16 ist an der Außenseite der Einlaufdüse 43 ein umlaufender Radialflansch 21 (Schnittstelle) vorgesehen, der zur Versteifung der Einlaufdüse 43 beiträgt und vorteilhaft einstückig mit der Düsenwand ausgebildet ist. Die Einlaufdüse 43 mit den Mantelabschnitten 8, 16, dem Leitrad 15, der Aufnahme 14, den Rändern 19, 20 und dem Radialflansch 21 können einteilig, vorteilhaft aus Kunststoff, ausgebildet sein.At the transition between the two wall sections 8, 16, 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.

In Fig. 3 ist mit gestrichelten Linien in Höhe der Auslassöffnung 26 ein nach außen sich erstreckender Radialflansch 49 dargestellt, der am Diffusoraufsatz 22 vorgesehen sein kann. Der Radialflansch 49 bildet wie der Befestigungsflansch 23 am gegenüberliegenden Ende eine Schnittstelle des Diffusoraufsatzes 22. Die Ventilatoreinheit weist bei dieser Ausführungsform somit die Schnittstellen 19, 20, 21 und 49 auf, über die die Ventilatoreinheit an das Gehäuse 1 des Gerätes 2 angebaut werden kann.In 3 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.

Der freie Rand 20 des Wandabschnittes 16 des Diffusors 4 dient als Befestigungsflansch bzw. Schnittstelle für den Diffusoraufsatz 22, dessen Strömungsquerschnitt sich in Strömungsrichtung der vom Ventilator 3 geförderten Luft vorteilhaft stetig erweitert. Dadurch wird insbesondere die Axialkomponente der Strömungsgeschwindigkeit verringert und somit die entsprechende dynamische Energie in nutzbare Druckenergie umgewandelt. Durch den Diffusoraufsatz 22 kann insbesondere im unteren Druckbereich der Volumenstrom in vorteilhafter Weise erhöht werden. Der Diffusoraufsatz 22 ist als Nachrüstteil ausgebildet, das an bereits bestehende Diffusoren problemlos angebaut werden kann.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.

Der Diffusoraufsatz 22 ist an seinem dem Diffusor 4 zugewandten Ende mit einem umlaufenden radialen Befestigungsflansch 23 als Schnittstelle versehen, mit dem der Diffusoraufsatz 22 auf dem Rand 20 des Diffusors 4 aufliegend befestigt werden kann. Der Diffusoraufsatz 22 ist lösbar mit dem Diffusor 4 verbunden.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 .

Der Diffusoraufsatz 22 ist so ausgebildet, dass seine konische Innenwand 24 eine stetige Fortsetzung der konischen Innenwand 25 des Mantelabschnittes 16 des Diffusors 4 bildet. Dadurch ist ein stetiger Übergang zwischen dem Diffusor 4 und dem Diffusoraufsatz 22 für die Luftströmung sichergestellt.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.

Im Ausführungsbeispiel hat der Diffusoraufsatz 22 etwa gleiche axiale Länge wie die Einlaufdüse 43. Die Aufnahme 14 sowie das Leitrad 15 ragen nicht in den Diffusoraufsatz 22, so dass die Luft innerhalb des Diffusoraufsatzes 22 optimiert verlustfrei zur Auslassöffnung 26 des Diffusoraufsatzes 22 strömen kann.In the exemplary embodiment, 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.

Der Diffusoraufsatz 22 kann aus jedem geeigneten Material bestehen, beispielsweise aus Kunststoff, aus metallischem Werkstoff, wie Aluminium oder Stahl, oder aus einem Schaumwerkstoff.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.

Durch den Diffusoraufsatz 22 wird eine weitere Wirkungsgradsteigerung der Ventilatoreinheit erreicht; insbesondere bei Geräten mit geringen Druckverlusten (hohe Volumenströme) wird die beste Wirkung erzielt. Wenn der Diffusoraufsatz 22 in bevorzugter Weise lösbar mit dem Diffusor 4 verbunden ist, kann der Anwender den Diffusoraufsatz 22 bei Bedarf problemlos abnehmen bzw. an den Diffusor 4 anbauen.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.

Der Diffusoraufsatz 22 gemäß Fig. 4 unterscheidet sich von der vorigen Ausführungsform dadurch, dass er eine umlaufende Zwischenwand 27 aufweist, die Abstand vom Mantel 28 des Diffusoraufsatzes 22 hat. Zwischen den beiden Wänden 27, 28 wird ein ringförmiger Durchlass 29 für die Luft gebildet. Die freien Enden der beiden umlaufenden Zwischenwände 27, 28 liegen in einer gemeinsamen Ebene. Diese können auch unterschiedlich hoch sein. Während der Mantel 28 im Axialschnitt gerade verläuft, ist die Zwischenwand 27 im Axialschnitt konkav gekrümmt ausgebildet. Die Zwischenwand 27 erstreckt sich von der Aufnahme 14 aus, an deren umlaufenden Mantel 30 sie anschließt.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.

Der Mantel 28 und die Zwischenwand 27 sind so ausgebildet, dass ihr Umriss in Richtung auf das freie Ende zunimmt, vorzugsweise stetig zunimmt. Dadurch haben der Mantel 28 und die Zwischenwand 27 am freien Ende den größten Umfang. Der Querschnitt des ringförmigen Durchlasses 29 nimmt in Richtung auf die Auslassöffnung 26 ab. Die Zwischenwand 27 und der Mantel 28 können aber auch so gestaltet sein, dass der Strömungsquerschnitt des Durchlasses 29 in Richtung auf die Auslassöffnung 26 konstant ist oder zunimmt. Bleibt der Strömungsquerschnitt gleich, dann liegt die Zwischenwand 27 über ihre Höhe parallel zum Mantel 28.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 . However, 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.

Im Ausführungsbeispiel liegen die freien Enden der Zwischenwand 27 und des Mantels 28 in einer gemeinsamen Ebene. Die Zwischenwand 27 kann aber auch niedriger oder höher sein als der Mantel 28. Durch die Wahl der Höhe der Zwischenwand 27 kann die Ventilatoreinheit optimal an die jeweiligen Strömungsverhältnisse so angepasst werden, dass die Austrittsverluste minimal sind.In the exemplary embodiment, the free ends of the intermediate wall 27 and the casing 28 lie in a common plane. However, the intermediate wall 27 can also be lower or higher than the shell 28. By selecting the height of the intermediate wall 27, the fan unit can be optimally adapted to the respective flow conditions in such a way that the outlet losses are minimal.

Da die Zwischenwand 27 am Mantel 30 der Aufnahme 40 befestigt ist, muss die Zwischenwand 27 nicht zusätzlich durch Querstreben und dergleichen am Mantel 28 abgestützt werden. Der Anschluss der Zwischenwand 27 an den Mantel 30 ist luftdicht ausgebildet, so dass die vom Ventilator 3 angesaugte Luft nur durch den Durchlass 29 strömt.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 .

Der Diffusoraufsatz 22 kann auch so ausgebildet sein, dass er wenigstens eine weitere ringförmige Zwischenwand aufweist (Fig. 14), so dass wenigstens ein weiterer Strömungsdurchlass für die Luft gebildet wird. Bei einer solchen Ausbildung liegen der Mantel 28 sowie die Zwischenwände jeweils mit Abstand zueinander. Der Mantel 28 und die Zwischenwände können über ihre Höhe zumindest etwa parallel zueinander verlaufen. Je nach Strömungsverhältnissen können sie auch so ausgebildet sein, dass sie sich nicht parallel zueinander erstrecken. Auch können der Mantel 28 und die Zwischenwände nicht nur gleiche, sondern auch unterschiedliche Höhe haben.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. In such a configuration, 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 zeigt eine Ausführungsform, bei der der Mantel 28 des Diffusoraufsatzes 22 an seiner Innenseite mit einer Schalldämpfungsschicht 31 versehen ist. Als schalldämpfendes Material kann jedes hierfür geeignete Material eingesetzt werden, wie etwa Steinwolle oder offenporiges Material, zum Beispiel Schäume. Die Schalldämpfungsschicht 31 ist vorteilhaft über den gesamten Umfang des Mantels 28 und auch vorteilhaft über dessen gesamte Höhe vorgesehen. Mit der Schalldämpfungsschicht 31 kann die Geräuschentwicklung beim Betrieb der Ventilatoreinheit weiter verringert werden. Im Übrigen ist der Diffusoraufsatz 22 gleich ausgebildet wie das Ausführungsbeispiel gemäß Fig. 3. figure 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. 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 .

Der Diffusoraufsatz 22 gemäß Fig. 6 zeichnet sich dadurch aus, dass sein Mantel 28 aus geschäumten Material besteht. Dadurch trägt der Mantel 28 zur Geräuschverminderung beim Einsatz der Ventilatoreinheit bei.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.

Der Mantel 28 ist an seinem dem Befestigungsrand 20 des Diffusors 4 zugewandten Ende mit Vertiefungen 32 versehen, die über den Umfang des Mantels 28 verteilt angeordnet und in Richtung auf den Befestigungsrand 20 offen sind. In Höhe der Vertiefungen 32 befinden sich (nicht dargestellte) Befestigungsmittel, wie Schrauben, mit denen der Diffusoraufsatz 22 am Befestigungsrand 20 befestigt werden kann. Die Vertiefungen 32 sind ausreichend groß, damit die Befestigungsmittel mit einem entsprechenden Werkzeug einfach betätigt werden können.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.

Bei den zuvor beschriebenen Ausführungsformen sind solche Vertiefungen nicht notwendig, weil der Befestigungsflansch 23 des Diffusoraufsatzes 22 radial über den Mantel 28 übersteht, so dass die Befestigungsmittel problemlos betätigt werden können.In the previously described embodiments, such depressions are not necessary because the fastening flange 23 of the diffuser attachment 22 protrudes radially beyond the casing 28, so that the fastening means can be actuated without any problems.

Der Mantel 28 ist im dargestellten Ausführungsbeispiel im Axialschnitt nach außen gekrümmt. Der aus geschäumtem Material bestehende Mantel 28 kann aber auch im Axialschnitt gerade schräg nach außen verlaufen oder nach innen gekrümmt sein.In the exemplary embodiment shown, the jacket 28 is curved outwards in axial section. However, the jacket 28 made of foamed material can also run obliquely outwards in an axial section or be curved inwards.

Fig. 7 zeigt die Möglichkeit, den Diffusoraufsatz 22 auf den Befestigungsrand 20 des Diffusors 4 aufzustecken. Der Mantel 28 des Diffusoraufsatzes 22 besteht aus einzelnen Mantelabschnitten 28a bis 28c, die über eine Steckverbindung 33 miteinander verbunden sind. Hierfür sind die einzelnen Wandabschnitte 28a bis 28c an einem Rand mit einer Formschlussvertiefung 34 und am anderen Rand mit einem entsprechenden Vorsprung 35 versehen. Die Vertiefungen 34 und Vorsprünge 35 sind so ausgebildet, dass sie in Umfangsrichtung des Mantels 28 nicht voneinander gelöst werden können. Die Vertiefungen 34 sind im Ausführungsbeispiel mit entsprechenden Hinterschnitten versehen. Die Steckverbindungen 33 können auch als Schwalbenschwanznutverbindungen gestaltet sein. Da der Mantel 28 aus wenigstens zwei Mantelabschnitten besteht, lässt sich der Diffusoraufsatz 22 einfach auf den Rand 20 des Diffusors 4 radial von außen aufstecken. Die Mantelabschnitte sind hierzu mit einem im Axialschnitt U-förmigen Steckteil 36 als Schnittstelle versehen, der sich über die Umfangslänge des jeweiligen Mantelabschnittes erstreckt. Der Steckteil 36 umgreift den Rand 20 radial von außen. Der Rand 20 ist vorteilhaft mit einem dünnen, radial vorstehenden umlaufenden Steg 37 versehen, auf den sich der Steckteil 36 einfach aufstecken lässt. Der Steckteil 36 ist vorteilhaft einstückig mit dem Mantel 28 ausgebildet. Er kann aber auch am Mantel 28 befestigt, beispielsweise angeschweißt sein. Die Vertiefungen 34 und Vorsprünge 35 sind so gestaltet, dass sie quer zur Umfangsrichtung des Mantels 28 zusammengefügt werden können. 7 shows the possibility of attaching the diffuser attachment 22 to the mounting edge 20 of the diffuser 4. 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. For this purpose, 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 . In the exemplary embodiment, the depressions 34 are provided with corresponding undercuts. The plug connections 33 can also be designed as dovetail groove connections. Since the shell 28 consists of at least two shell sections, the diffuser attachment 22 can be simply slipped onto the edge 20 of the diffuser 4 radially from the outside. For this purpose, 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 .

Im Übrigen ist der Diffusoraufsatz 22 gleich ausgebildet wie das Ausführungsbeispiel nach Fig. 3.Otherwise, the diffuser attachment 22 is designed in the same way as the exemplary embodiment according to FIG 3 .

Der Diffusoraufsatz 22 gemäß Fig. 8 ist ebenfalls gleich ausgebildet wie das Ausführungsbeispiel nach Fig. 3. Zusätzlich ist der Diffusoraufsatz mit einem Berührschutz 38 versehen, der in unterschiedlichen Positionen am Diffusoraufsatz 22 vorgesehen sein kann. In Fig. 8 sind beispielhaft drei mögliche Einbaupositionen für den Berührschutz 38 dargestellt. Im Hinblick auf geringe Geräuschentwicklung und geringe Druckverluste ist es von Vorteil, wenn der Berührschutz 28 einen möglichst großen Abstand vom Ventilator 3 hat. Eine optimale Einbauposition ist somit die Anordnung des Berührschutzes 38 im Bereich der Auslassöffnung 26 des Diffusoraufsatzes 22.The diffuser attachment 22 according to 8 is also designed the same as the embodiment 3 . In addition, the diffuser attachment is provided with a touch guard 38 which can be provided in different positions on the diffuser attachment 22 . In 8 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.

Der Berührschutz 38 ist in bekannter Weise ausgebildet, beispielsweise durch ein Draht- oder Kunststoffgitter gebildet. Es ist vorteilhaft an der Innenwand des Mantels 28 des Diffusoraufsatzes 22 befestigt oder hinten aufgesetzt. In jeder Einbauposition steht der Berührschutz 38 somit entweder nicht über die Auslassöffnung 26 vor oder er liegt vor der Auslassöffnung 26. Der Berührschutz 38 kann aufgeschraubt, geklipst, genietet, geschweißt oder eingeschäumt sein.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.

Fig. 9 zeigt die Möglichkeit, den die Auslassöffnung 26 begrenzenden freien Rand 39 des Diffusoraufsatzes 22 profiliert auszubilden. Im dargestellten Beispielsfall ist der freie Rand 39 über seinen Umfang sägezahnartig ausgebildet. Vorteilhaft sind die Zähne 40 gleich ausgebildet und über den Umfang des Randes 39 in gleichen Abständen hintereinander angeordnet. Diese Profilierung trägt zu einem geringen Geräusch der Ventilatoreinheit bei. 9 shows the possibility of forming the free edge 39 of the diffuser attachment 22 that delimits the outlet opening 26 in a profiled manner. In the example shown, 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.

Bei der Ausführungsform gemäß Fig. 10 ist der freie Rand 39 des Mantels 28 des Diffusoraufsatzes 22 wellenförmig profiliert. Vorteilhaft ist auch bei einer solchen Profilierung, dass die Wellen über den Umfang des Mantels 28 gleichmäßig verlaufen.In the embodiment according to 10 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 .

Der Diffusoraufsatz 22 der Ausführungsformen nach den Fig. 9 und 10 ist im Übrigen gleich ausgebildet wie das Ausführungsbeispiel nach Fig. 3. Die beschriebenen Profilierungen des freien Randes 39 können auch bei den anderen Ausführungsformen des Diffusoraufsatzes 22 vorgesehen sein.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 .

Eine Schalldämpfung kann auch dadurch erreicht werden, dass an der Innenwand 24 des Mantels 28 in Höhenrichtung verlaufende Rippen vorgesehen sind, die sich vorteilhaft über die gesamte Höhe des Mantels 28 erstrecken und vorteilhaft in gleichen Abständen über den Umfang des Mantels verteilt angeordnet sind. Diese Rippen können in Axialrichtung verlaufen, aber auch eine Steigung aufweisen.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.

Die Fig. 11 bis 14 zeigen Diffusoraufsätze, deren Auslassöffnung einen eckigen, im Ausführungsbeispiel rechteckigen Umriss aufweist. Dabei ändert sich die Querschnittsform des Diffusoraufsatzes vom Einlassbereich zum Auslassbereich von einem kreisförmigen in den eckigen Querschnitt. Der Befestigungsflansch 23 hat kreisförmigen Umriss und bildet, wie auch bei den anderen zuvor beschriebenen Ausführungsbeispielen, die Schnittstelle, mit der der Diffusoraufsatz 22 am Befestigungsrand 20 des Diffusors 4 befestigt werden kann. An den Befestigungsflansch 23 schließt ein Wandabschnitt 41 an, der zunächst kreisförmigen Querschnitt hat und mit zunehmendem Abstand vom Befestigungsflansch 23 stetig in eine viereckige Umrissform übergeht. Die Auslassöffnung 26 wird von einem Wandabschnitt 42 begrenzt, der im Ausführungsbeispiel rechteckigen oder runden Umriss hat. Der Mantel 28 weist somit über einen Teil seiner Höhe viereckigen Umriss auf. Wie Fig. 11 zeigt, sind die Ecken der Seitenwände des Mantels 28 abgerundet. Im Folgenden wird aber weiterhin von einer viereckigen Umrissform gesprochen. Grundsätzlich ist es aber auch möglich, dass die Seitenwände des Mantels 28 scharfkantig aneinander anschließen.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.

In Fig. 11 sind die Leitschaufeln 17 des Leitrades 15 erkennbar, die mit einem Ende am Mantel 30 der Aufnahme 14 und mit dem anderen Ende am Wandabschnitt 16 des Diffusors 4 befestigt sind.In 11 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 .

Der Diffusor 4 ist Teil der Einlaufdüse 43, die mit dem freien Rand 19 auf einer Düsenplatte 44 befestigt ist. Im Ausführungsbeispiel hat die Düsenplatte 44 rechteckigen Umriss. Der Umriss des Diffusoraufsatzes 22 entspricht im Bereich der Auslassöffnung 26 vorteilhaft dem Umriss der Düsenplatte 44.The diffuser 4 is part of the inlet nozzle 43 which is fastened to a nozzle plate 44 with the free edge 19 . In the exemplary embodiment, 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.

Die Düsenplatte 44 und/oder die Auslassöffnung 26 kann je nach Anwendungsfall unterschiedlichste Umrissformen haben, zum Beispiel quadratische, rechteckige, sechseckige oder dreieckige Umrissform.Depending on the application, 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.

Fig. 12 zeigt beispielhaft, dass die Übergänge zwischen den Seitenwänden des Mantels 28 unter einem Winkel zur jeweiligen Radialen des Diffusoraufsatzes liegen können. Diese Übergänge zwischen den Seitenwänden sind durch die Linien 45 angedeutet. Die Übergänge verlaufen linear. 12 shows by way of example that the 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.

Wie Fig. 13 zeigt, können diese Übergänge 45 zwischen den Seitenwänden des Mantels 28 im eckigen Querschnittsbereich auch über ihre Höhe gekrümmt (verwunden) verlaufen. Die Krümmung ist so vorgesehen, dass die Übergänge 45 einen Drall aufweisen und der Strömungsrichtung der Luft hinter dem Ventilator 3 folgen. Die Übergangsbereiche 45 schließen über ihre Länge einen Winkel mit einer Radialen 46 des Diffusoraufsatzes 22 ein, die durch die abgerundete Ecke des Mantels 28 verläuft. Die Übergänge 45 erstrecken sich etwa von der Austrittsöffnung 26 aus bis nahe an den Befestigungsflansch 23 des Diffusoraufsatzes 22.How 13 shows, 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 zeigt ein Beispiel eines Diffusoraufsatzes 22, der außer dem Mantel 28 und der Innenwand 27 eine umlaufende Zwischenwand 47 aufweist. Die Wände 27, 28, 47 haben über ihren gesamten Umfang Abstand voneinander, vorzugsweise gleichen Abstand. Zwischen den einzelnen Wänden werden dadurch Durchlässe 29, 48 gebildet. Die vom Ventilator 3 angesaugte Luft gelangt in die beiden Durchlässe 29, 48, die jeweils ringförmig verlaufen. Die Innenwand 27 kann in geeigneter Weise beispielsweise mit der Zwischenwand 47 fest verbunden werden. 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. As a result, 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.

Die Wände 27, 28, 47 verlaufen zumindest etwa parallel zueinander. Je nach Einsatzfall der Ventilatoreinheit können die Wände aber auch so vorgesehen sein, dass sie nicht parallel zueinander verlaufen. Vorteilhaft haben die Wände 27, 28, 47 gleiche Höhe. Die Wände können aber auch unterschiedlich hoch sein. So kann die Höhe der Wände von außen nach innen zu- oder abnehmen. Es können aber auch zwei der Wände gleich hoch und die dritte Wand höher oder kürzer sein als die beiden anderen Wände. Somit kann durch Wahl der Höhe der einzelnen Wände das jeweils günstigste Strömungsverhältnis eingestellt werden.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.

Alle drei Wände 27, 28, 47 sind so ausgebildet, dass sie im Anschlussbereich an den Diffusor 4 kreisförmigen Querschnitt haben, der dann stetig in den eckigen Querschnitt der einzelnen Wände übergeht. Die Übergänge 45 zwischen den Seiten der Wände verlaufen im Beispielsfalle über ihre Länge gekrümmt, ähnlich wie beim Diffusoraufsatz 22 gemäß Fig. 13. Es ist selbstverständlich möglich, die gewundenen Übergänge 45 nur an einer Wand oder an zwei Wänden des Diffusoraufsatzes 22 vorzusehen. Dann kann in Verbindung mit der Umrissgestaltung der Wände 27, 28, 47 eine optimale Anpassung an die jeweils gewünschten Strömungsverhältnisse erreicht werden.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. In the example, 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.

Die Übergänge 45 können aber auch gerade verlaufen, wie dies bei der Ausführungsform gemäß Fig. 12 vorgesehen ist. Dabei können die Übergänge in der jeweiligen, durch die Ecke der Wände gehenden Radialen liegen, aber auch unter einem Winkel zu dieser Radialen verlaufen.However, the 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.

Der Diffusoraufsatz 22 kann, wenn er eine oder zwei weitere Wände aufweist, verhältnismäßig kurz gebaut werden. Die vom Ventilator 3 geförderte Luft gelangt in die ringförmigen Durchlässe 29, 48. Der Durchströmquerschnitt dieser Durchlässe nimmt in Strömungsrichtung zunächst ab, wodurch die Luft in diesem Bereich beschleunigt wird. Dies führt zu einer Vergleichmäßigung der Luftströmung. Anschließend kann die Luftströmung mit geringeren Verlusten verzögert werden, wodurch sich ein hoher Wirkungsgrad des Diffusoraufsatzes 22 ergibt. Hierzu nimmt der Strömungsquerschnitt der Durchlässe 29, 48 in Richtung auf die Auslassöffnung 26 wieder zu, vorzugsweise stetig.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 . For this purpose, the flow cross section of the passages 29, 48 increases again in the direction of the outlet opening 26, preferably continuously.

In der Aufnahme 14 des Diffusors 4 ist der Antriebsmotor 13 untergebracht, wenn es sich um einen Innenläufermotor handelt. Wird für den Ventilator 3 ein Außenläufermotor eingesetzt, dann wird in der Aufnahme 14 ein Klemmkasten oder die entsprechende Elektronik angeordnet.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.

Der Diffusor 4 mit dem Diffusoraufsatz 22 kann für die unterschiedlichsten Anwendungen eingesetzt werden, beispielsweise für Verdampfer, Verflüssiger, Luftkühler, Rückkühler und dergleichen.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.

Wird der Diffusoraufsatz 22 verwendet, dann wird insbesondere im unteren Druckbereich noch mehr Volumenstrom erzielt. Der Diffusoraufsatz ist ein einfaches und kostengünstig herzustellendes Bauteil, das jederzeit nachträglich an den Diffusor 4 angebaut werden kann.If 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.

Claims (17)

  1. Ventilator unit having at least one ventilator (3), which is surrounded by an inlet nozzle (43), and a diffuser (4) assigned to the ventilator (3),
    characterized in that the diffuser (4) is an integrated constituent of the inlet nozzle (43), and in that the free edge of a wall section (16) of the diffuser (4) has an interface (20, 37) for a diffuser attachment (22), which is detachably attached using an interface (23, 36) to the interface (20, 37) of the diffuser (4) in such a manner, that the inner wall of the diffuser attachment (22) forms a steady continuation of the inner wall (25) of the diffuser (4).
  2. Ventilator unit according to Claim 1,
    characterized in that the diffuser attachment (22) expands in the flow direction of the air.
  3. Ventilator unit according to Claim 1 or 2,
    characterized in that the interface (20) of the diffuser attachment (22) is a peripheral radial flange.
  4. Ventilator unit according to Claim 1 or 2,
    characterized in that the interface (36) of the diffuser attachment (22) is at least one plug component, which can be plugged onto the interface (20) of the diffuser (4).
  5. Ventilator unit according to Claim 4,
    characterized in that a casing (28) of the diffuser attachment (22) consists of at least two casing sections (28a to 28c), which are connected to one another by means of positive-fitting parts (34, 35), which advantageously generate a positive fit in the peripheral direction of the casing (28) and allow joining transversely to the peripheral direction.
  6. Ventilator unit according to one of Claims 1 to 5,
    characterized in that the diffuser attachment (22) is provided with at least one sound damping layer (31), which is preferably provided on the inner side of a casing (28) of the diffuser attachment (22).
  7. Ventilator unit according to one of Claims 1 to 6,
    characterized in that the diffuser attachment (22) has a circular cross section at least over part of the height thereof.
  8. Ventilator unit according to one of Claims 1 to 7,
    characterized in that at least the outlet opening (26) of the diffuser attachment (22) has a non-circular, particularly angular outline.
  9. Ventilator unit according to one of Claims 1 to 8,
    characterized in that the diffuser attachment (22) has a circular cross section in the region of its interface (20, 36), which cross section merges with increasing distance from the interface (20, 36) into a non-circular, particularly angular cross section. \
  10. Ventilator unit according to one of Claims 1 to 9,
    characterized in that the diffuser attachment (22) has at least one further peripheral wall (27, 47), which is surrounded with spacing by the casing (28) of the diffuser attachment (22) and advantageously runs parallel to the casing (28) of the diffuser attachment (22).
  11. Ventilator unit according to one of Claims 1 to 10,
    characterized in that the side walls of the casing (28) of the diffuser attachment (22) merge in a curved manner, and in that the transitions (45) between the side walls of the casing (28) of the diffuser attachment (22) advantageously have a swirl (twist) in the height direction.
  12. Ventilator unit according to one of Claims 5 to 11,
    characterized in that the casing (28) of the diffuser attachment (22) consists of foamed material.
  13. Ventilator unit according to one of Claims 1 to 12,
    characterized in that the diffuser (4) is provided with a guide wheel (15) having guide vanes or webs (17), and in that the diffuser (4) is constructed in one piece with the guide wheel (15), preferably from plastic.
  14. The ventilator unit according to one of Claims 1 to 13,
    characterized in that the inlet nozzle (43) is constructed in one piece with its casing sections (8, 16), the guide wheel (15), a mount (14) and interfaces (19, 20, 21), preferably from plastic.
  15. Ventilator unit according to one of Claims 1 to 14,
    characterized in that an outflow edge (26) of the diffuser attachment (22), which advantageously consists of at least two sections which can be axially attached to one another, is constructed in a profiled, preferably serrated or undulating manner.
  16. Ventilator unit according to one of Claims 1 to 15,
    characterized in that the inlet nozzle (43) has a wall section (8) which encloses a space accommodating the ventilator (3).
  17. Ventilator unit according to one of Claims 1 to 16,
    characterized in that a drive motor (13) of the ventilator (3) is accommodated in a mount (14), which is accommodated in a space of the diffuser (4), which is surrounded by a wall section (16).
EP13004754.1A 2012-10-05 2013-10-02 Ventilator unit Active EP2716916B8 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201332056T SI2716916T1 (en) 2012-10-05 2013-10-02 Ventilator unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012019795.0A DE102012019795A1 (en) 2012-10-05 2012-10-05 fan unit

Publications (4)

Publication Number Publication Date
EP2716916A2 EP2716916A2 (en) 2014-04-09
EP2716916A3 EP2716916A3 (en) 2014-09-10
EP2716916B1 true EP2716916B1 (en) 2023-05-10
EP2716916B8 EP2716916B8 (en) 2023-08-02

Family

ID=49382164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13004754.1A Active EP2716916B8 (en) 2012-10-05 2013-10-02 Ventilator unit

Country Status (4)

Country Link
EP (1) EP2716916B8 (en)
DE (1) DE102012019795A1 (en)
ES (1) ES2953109T3 (en)
SI (1) SI2716916T1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018127718A1 (en) * 2018-11-07 2020-05-07 ebm-papst AB Air control arrangement for a ventilation system
DE102018128811A1 (en) * 2018-11-16 2020-05-20 Ebm-Papst Mulfingen Gmbh & Co. Kg Diagonal fan that can be combined with different nozzles
DE102021107361A1 (en) 2021-03-24 2022-09-29 Ebm-Papst St. Georgen Gmbh & Co. Kg Multi-stage axial fan
CN113623249B (en) * 2021-08-26 2022-10-28 西安交通大学 Parallel type efficient axial flow fan with partition plates arranged in rectangular outlet diffusion cylinder

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB700872A (en) * 1950-08-14 1953-12-09 Elisabeth Ferdinande Happel Improved air-cooled condenser for steam power plants, particularly for large plants
GB1196176A (en) * 1966-08-05 1970-06-24 Chiyoda Chem Eng Construct Co Silencers for Axial - Flow Fluid Fans

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1752427A (en) * 1923-06-09 1930-04-01 Elisha N Fales Device for improving the aerodynamic efficiency of an exhauster fan
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
IT1036993B (en) * 1974-07-02 1979-10-30 Rotron Inc DEVICE FOR THE MOVEMENT OF A FLUID
DE3515441A1 (en) * 1985-04-29 1986-10-30 Dieter Prof. Dr.-Ing. 7500 Karlsruhe Wurz Blower cooler
FR2728028B1 (en) * 1994-12-07 1997-03-14 Sardou Max DEVICE FOR TRANSFORMING THE MECHANICAL ENERGY OF AN ENGINE INTO A GAS PRESSURE
WO2010111339A1 (en) * 2009-03-25 2010-09-30 Delta T Corporation High efficiency ducted fan
US8622695B2 (en) * 2009-08-12 2014-01-07 Xcelaero Corporation Flow trim for vane-axial fans
BR112012022629A2 (en) * 2010-03-08 2017-10-17 Bosch Gmbh Robert axial cooling fan cover
US8154866B2 (en) * 2010-04-19 2012-04-10 Hewlett-Packard Development Company, L.P. Single rotor ducted fan
DE102011015784A1 (en) * 2010-08-12 2012-02-16 Ziehl-Abegg Ag fan
DE102010034604A1 (en) * 2010-08-13 2012-02-16 Ziehl-Abegg Ag Impeller for a fan
DE202010016820U1 (en) * 2010-12-21 2012-03-26 Ebm-Papst Mulfingen Gmbh & Co. Kg Diffuser for a fan and fan assembly with such a diffuser

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB700872A (en) * 1950-08-14 1953-12-09 Elisabeth Ferdinande Happel Improved air-cooled condenser for steam power plants, particularly for large plants
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
ES2953109T3 (en) 2023-11-08
EP2716916A2 (en) 2014-04-09
EP2716916A3 (en) 2014-09-10
SI2716916T1 (en) 2023-10-30
DE102012019795A1 (en) 2014-04-10
EP2716916B8 (en) 2023-08-02

Similar Documents

Publication Publication Date Title
EP2815130B1 (en) Diffusor, ventilator having such a diffusor, and device having such ventilators
EP2778432B1 (en) Ventilator assembly with flow rectifier
EP1895166B1 (en) Flow director for a fan
EP2655891B1 (en) Fan diffuser with circular inlet and non rotation-symmetric outlet
EP2716915B1 (en) Housing for an axial ventilator
DE102015207800A1 (en) Diagonal or centrifugal fan, guide for such a fan and system with such a fan or with several such fans
EP3824190B1 (en) Ventilator and deflector plate for a ventilator
DE102011015784A1 (en) fan
EP2716916B1 (en) Ventilator unit
EP3559474A1 (en) Fan module and arrangement of one or more such fan modules in a flow duct
EP3631210A2 (en) Fan and inlet guide grid for a fan
EP2876305B1 (en) Ventilator unit
DE102015213470A1 (en) Lüfterbaustein
DE102018211809A1 (en) Housing for a fan and fan
WO2020152211A1 (en) Impeller of a motor vehicle
DE202018106508U1 (en) Variable with different nozzles combinable diagonal fan
WO2013143671A1 (en) Fan, particularly for use in air conditioning and refrigeration technology
EP2465647A2 (en) Hand tool machine with air circulation element
DE102020200363A1 (en) Support module for a fan and fan with a corresponding support module
WO2022128011A1 (en) Fan and volute for a fan
WO2020099035A1 (en) Mixed flow fan that can be variably combined with different nozzles
DE102022210555A1 (en) Fan and cooling structure for a fan
WO2024074176A1 (en) Outlet guide vane device for a ventilator, and ventilator comprising an outlet guide vane device
EP4390143A1 (en) Flow guiding device and fan unit having the flow guiding device
DE102021204491A1 (en) Fan, in particular radial or diagonal fan

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RIC1 Information provided on ipc code assigned before grant

Ipc: F04D 29/54 20060101AFI20140804BHEP

Ipc: F04D 29/66 20060101ALI20140804BHEP

17P Request for examination filed

Effective date: 20150310

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20191212

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20221208

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1566927

Country of ref document: AT

Kind code of ref document: T

Effective date: 20230515

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502013016374

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 502013016374

Country of ref document: DE

Owner name: ZIEHL-ABEGG SE, DE

Free format text: FORMER OWNER: ZIEHL-ABEGG AG, 74653 KUENZELSAU, DE

REG Reference to a national code

Ref country code: CH

Ref legal event code: PK

Free format text: BERICHTIGUNG B8

RAP4 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: ZIEHL-ABEGG SE

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20230510

REG Reference to a national code

Ref country code: AT

Ref legal event code: HC

Ref document number: 1566927

Country of ref document: AT

Kind code of ref document: T

Owner name: ZIEHL-ABEGG SE, DE

Effective date: 20230718

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230510

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230911

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230810

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230510

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20230822

Year of fee payment: 11

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2953109

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20231108

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230510

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230510

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230510

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230510

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230910

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230510

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230811

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20230830

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230510

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230510

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20231106

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230510

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230510

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230510

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230510

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230510

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230510

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SI

Payment date: 20230823

Year of fee payment: 11

Ref country code: IT

Payment date: 20231018

Year of fee payment: 11

Ref country code: DE

Payment date: 20231222

Year of fee payment: 11

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502013016374

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20240213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230510

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20231031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20231002

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20231002

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20231031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20231031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20231031