EP2716916A2 - Unité de ventilateur - Google Patents

Unité de ventilateur Download PDF

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Publication number
EP2716916A2
EP2716916A2 EP13004754.1A EP13004754A EP2716916A2 EP 2716916 A2 EP2716916 A2 EP 2716916A2 EP 13004754 A EP13004754 A EP 13004754A EP 2716916 A2 EP2716916 A2 EP 2716916A2
Authority
EP
European Patent Office
Prior art keywords
diffuser
fan unit
attachment
unit according
jacket
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.)
Granted
Application number
EP13004754.1A
Other languages
German (de)
English (en)
Other versions
EP2716916A3 (fr
EP2716916B8 (fr
EP2716916B1 (fr
Inventor
Tobias Gauss
Frieder Lörcher
Michael Stephan
Daniel SEIFRIED
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ziehl Abegg SE
Original Assignee
Ziehl Abegg SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ziehl Abegg SE filed Critical Ziehl Abegg SE
Priority to SI201332056T priority Critical patent/SI2716916T1/sl
Publication of EP2716916A2 publication Critical patent/EP2716916A2/fr
Publication of EP2716916A3 publication Critical patent/EP2716916A3/fr
Application granted granted Critical
Publication of EP2716916B1 publication Critical patent/EP2716916B1/fr
Publication of EP2716916B8 publication Critical patent/EP2716916B8/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/545—Ducts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/663—Sound attenuation
    • F04D29/664—Sound attenuation by means of sound absorbing material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/52—Outlet

Definitions

  • the invention relates to a fan unit according to the preamble of claim 1.
  • the diffuser serves to convert the kinetic energy into pressure energy.
  • the flow cross-section of the diffuser expands in the flow direction of the air flow generated by the fan.
  • an increase in efficiency of the fan unit can be achieved with the diffuser, because it can convert at least a part of the flow energy of the air flow into static pressure.
  • the fan can operate at a lower speed with the same air flow, thereby reducing noise and power consumption during operation of the fan unit.
  • the invention has the object of providing the generic fan unit in such a way that the static efficiency of the fan increases and the fan noise can be reduced.
  • the diffuser is provided with the 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 extended. As a result, in particular the axial component of the flow velocity reduced accordingly, thereby converting the dynamic energy into usable pressure energy.
  • the static efficiency of the fan can be significantly increased in this way. In this case, the fan can be operated at a low speed without affecting the air performance.
  • the fan unit according to the invention therefore also works with very little operating noise. Since the diffuser attachment and the diffuser are provided with the interfaces, the diffuser attachment can be easily attached by the user to his fan unit. Since the inner wall of the diffuser attachment forms a continuous continuation of the inner wall of the diffuser, an optimal air flow results.
  • the diffuser attachment can then also be removed from the diffuser by the user or, for example, replaced in a repair case by a new diffuser attachment.
  • the interface of the diffuser attachment may advantageously be a circumferential radial flange. It allows easy connection of the diffuser attachment to the diffuser.
  • the diffuser attachment may, for example, be connected to the interface of the diffuser by rivets, screws, clips and the like.
  • the interface is formed by at least one plug-in part, which can be plugged onto the interface of the diffuser.
  • the jacket of the diffuser attachment consists of at least two shell sections, which are connected to each other by form-fitting parts.
  • the Aufsteckvorgang is very easy to carry out. It is first attached a jacket section with its male part on the interface of the diffuser. Subsequently, the other shell portion is plugged with its male part on the diffuser interface, wherein the form-fitting parts of the shell sections engage each other.
  • These form-fitting parts are designed so that the positive engagement is provided in the circumferential direction of the shell, that the form-fitting parts can be joined but transversely to the circumferential direction.
  • the diffuser attachment is provided with at least one sound-damping 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 a portion of its height.
  • the generatrix of the jacket of the diffuser attachment can run straight or curved. In a curved course, the generatrix may be curved convexly or concavely.
  • At least the outlet opening of the diffuser attachment has a non-circular, in particular an angular outline.
  • This angular design makes it possible to place a plurality of diffuser attachments with only a small distance next to each other, so that in devices in which only a limited amount of space is available and more diffuser essays are needed, they can be arranged directly next to each other in one or more rows.
  • outlet opening of the diffuser attachment has a quadrangular outline
  • adjacent diffuser attachments can be positioned with their respective contour sides either abutting one another or with only a minimal distance next to and behind one another.
  • the surface is optimally used to delay the flow velocity.
  • the jacket may have at least at the outlet opening triangular, square, hexagonal or other polygonal outline.
  • the quadrangular outline is advantageous if the mounting surface of the device has a corresponding quadrangular outline.
  • the diffuser attachment in the region of its interface has a circular cross-section, which merges with increasing distance from the interface into a non-circular, in particular polygonal cross-section.
  • the diffuser attachment is provided with at least one further peripheral wall, which is surrounded at a distance from the jacket of the diffuser attachment. This additional wall results in optimum flow conditions.
  • the side walls of the shell of the diffuser attachment are advantageously curved into each other. This results in an optimal guidance for the air flow and thus good flow conditions.
  • transitions between the side walls of the jacket of the diffuser attachment advantageously have a twist or a twist in the height direction.
  • the transitions do not run along a straight line in the vertical direction of the jacket, but are correspondingly curved. These transition areas are designed so that they follow the flow direction of the air in the diffuser tower or the swirl of the air flow behind the impeller of the fan. This results in only minimal losses in the range of these transitions.
  • a further reduction of the operating noise of the fan unit results in an advantageous manner when the jacket of the diffuser attachment consists of foamed material.
  • the diffuser is advantageously provided with a Nachleitrad having guide vanes or webs.
  • the diffuser is advantageously formed integrally with the Nachleitrad, preferably made of plastic.
  • the diffuser is advantageously part of an inlet nozzle, which surrounds the fan.
  • the inlet nozzle with its jacket sections, the Nachleitrad, a receptacle and interfaces in one piece, preferably made of plastic, is formed.
  • a trailing edge of the diffuser attachment is formed profiled, preferably serrated or wavy.
  • the exiting from the outlet opening of the diffuser attachment air flow is thereby divided into individual partial streams, which in use, the noise is further reduced.
  • the diffuser attachment may consist of at least two axially connectable sections. As a result, it is possible to very easily produce different height diffuser attachments by axially joining the sections together.
  • Fig. 1 shows a schematic representation of a housing 1 of a device 2, which is a heat exchanger by way of example.
  • the device 2 is a stand-alone device in the embodiment, but may also be a mounted on a wall, a ceiling and the like device. It has at least one fan unit. In the illustrated embodiment, two rows are provided at a small distance successively arranged fan units.
  • the fan unit has a fan 3 and a diffuser 4 (FIG. Fig. 3 ).
  • a diffuser attachment 22 is placed on its diffuser 4 ( Fig. 2 ), through which leakage losses are minimized.
  • the diffusers 4, 22 convert the velocity of the exiting air into pressure.
  • the fan units are arranged on the rectangular top 5 of the housing 1. So that the rectangular surface of the upper side 5 is optimally utilized, the diffuser attachments 22 have a quadrangular outline. This quadrangular shape leads to a large exit surface for the exiting air at a predetermined surface of the housing top 5. Also, such a design prevents flow separation. Due to their quadrangular shape, the diffuser tips 22 can be arranged side by side so that they touch each other with their adjacent edges, as shown in FIG Fig. 2 can be seen. With such a design of the device 2 results in a particularly high efficiency increase.
  • the diffuser tips 22 do not have to have the quadrangular outline, but may for example also have a circular outline.
  • the fans 3 may be axial, diagonal or radial fans.
  • an axial fan 3 is shown in each case. He has projecting from a hub 6 wings 7, which are arranged over the circumference of the hub 6 at regular or at irregular intervals and extend to close to a wall portion 8 of an inlet nozzle 43. The area enclosed by the wall section 8 space tapers in the flow direction of the sucked air.
  • the vanes 7 may be formed in any suitable shape, preferably staggered (the vane angle is not constant).
  • the wings 7 may be provided with winglets 9, which may extend only over a part or over the entire width of the wing 7.
  • the winglets 9 can be provided only on the suction or only on the pressure side of the wings 7. It is also possible that the winglets 9 extend both to the suction and to the pressure side.
  • the winglets 9 can over their length constant or different heights, depending on the application of the fan. 3
  • Fig. 3 shows, in the direction of rotation of the fan rear edges 10 are advantageously provided with teeth 11 which may be provided over the entire length or only over a part of the length of the rear edge 10.
  • the front in the direction of rotation edge 12 of the wings 7 is designed advantageously sickle-shaped.
  • the fan 3 is located within the space enclosed by the wall section 8.
  • the hub 6 is seated on a (not shown) motor shaft of a drive motor 13 which is housed in a receptacle 14. It is attached via a stator 15 on the inside of a wall portion 16 of the inlet nozzle 43.
  • the stator 15 consists in a known manner from spaced apart vanes or webs 17 (hereinafter referred to as vanes), which are distributed over the circumference of the receptacle 14 and attached to the outside of the receptacle 14 and on the inside of the wall portion 16 in a suitable manner are.
  • the vanes 17 are fluidically designed so that they do not hinder the air sucked by the fan 3 via the inlet opening 18 of the inlet nozzle 43 and remove the swirl from the flow.
  • the wall portion 16 widens conically in the flow direction of the air and thus forms the diffuser 4. It is an integral part of the inlet nozzle 43.
  • the receptacle 14 with the stator 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 may each be thickened and thereby form fastening edges or interfaces. With the edge 19 of the diffuser 4 is fixed in a known manner to the respective device or the respective unit.
  • a circumferential radial flange 21 (interface) provided, which contributes to the stiffening of the inlet nozzle 43 and is advantageously formed integrally with the nozzle wall.
  • the inlet nozzle 43 with the jacket sections 8, 16, the stator 15, the receptacle 14, the edges 19, 20 and the radial flange 21 may be integrally formed, advantageously made of plastic.
  • Fig. 3 is shown with dashed lines at the level of the outlet opening 26 an outwardly extending radial flange 49 which may be provided on the diffuser attachment 22.
  • the radial flange 49 forms as the mounting flange 23 at the opposite end an interface of the diffuser attachment 22.
  • the fan unit has in this embodiment thus the interfaces 19, 20, 21 and 49, via which the fan unit can be attached to the housing 1 of the device 2.
  • the free edge 20 of the wall section 16 of the diffuser 4 serves as a mounting flange or interface for the diffuser attachment 22, whose flow cross-section advantageously continuously widens in the flow direction of the air conveyed by the fan 3.
  • the diffuser attachment 22 the volume flow can be increased in an advantageous manner, in particular in the lower pressure range.
  • the diffuser attachment 22 is designed as a retrofit part that can be easily mounted on existing diffusers.
  • the diffuser attachment 22 is provided at its end facing the diffuser 4 with an encircling radial attachment flange 23 as an interface with which the diffuser attachment 22 can be fastened resting on the edge 20 of the diffuser 4.
  • the attachment can be done in any suitable manner, for example by screwing, welding, gluing and the like.
  • the diffuser attachment 22 is detachably connected to the diffuser 4.
  • the diffuser attachment 22 is designed so that its conical inner wall 24 forms a continuous continuation of the conical inner wall 25 of the shell section 16 of the diffuser 4. This ensures a steady 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 stator 15 do not protrude into the diffuser attachment 22, so that the air within the diffuser attachment 22 can flow in an optimized manner to the outlet opening 26 of the diffuser attachment 22.
  • the diffuser cap 22 may be made of any suitable material, such as plastic, metallic material, such as aluminum or steel, or a foam material.
  • the diffuser attachment 22 By the diffuser attachment 22, a further increase in efficiency of the fan unit is achieved; especially for devices with low pressure losses (high flow rates), the best effect is achieved. If the diffuser attachment 22 is preferably detachably connected to the diffuser 4, the user can remove the diffusor attachment 22 without problem or add it to the diffuser 4 as needed.
  • the diffuser attachment 22 according to FIG Fig. 4 differs from the previous embodiment in that it has a circumferential intermediate wall 27, the distance from the jacket 28 of the diffuser attachment 22 has. Between the two walls 27, 28, an annular passage 29 is formed for the air. The free ends of the two circumferential partition walls 27, 28 lie in a common plane. These can also be different. While the jacket 28 extends in an axial section straight, the intermediate wall 27 is formed concavely curved in axial section. The intermediate wall 27 extends from the receptacle 14, at the peripheral jacket 30 it connects.
  • the jacket 28 and the intermediate wall 27 are formed so that their outline increases in the direction of the free end, preferably steadily increases. As a result, the jacket 28 and the intermediate wall 27 at the free end of the largest circumference.
  • the cross section of the annular passage 29 decreases in the direction of the outlet opening 26.
  • the intermediate wall 27 and the jacket 28 can also be designed so 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, then the intermediate wall 27 lies parallel to the jacket 28 over its height.
  • the free ends of the intermediate wall 27 and the jacket 28 lie in a common plane.
  • the intermediate wall 27 can also be lower or higher than the jacket 28.
  • the intermediate wall 27 Since the intermediate wall 27 is fastened to the jacket 30 of the receptacle 40, the intermediate wall 27 does not have to be additionally supported on the jacket 28 by transverse struts and the like.
  • the connection of the intermediate wall 27 to the jacket 30 is 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 such that it has at least one further annular intermediate wall ( Fig. 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 each other.
  • the jacket 28 and the intermediate walls may extend over their height at least approximately parallel to each other.
  • they can also be designed so that they do not extend parallel to one another.
  • the jacket 28 and the Partitions not only have the same, but also different heights.
  • Fig. 5 shows an embodiment in which the jacket 28 of the diffuser attachment 22 is provided on its inside with a sound-damping layer 31.
  • a sound-damping layer 31 Any material suitable for this purpose can be used as the sound-damping material, such as rockwool or open-pore material, for example foams.
  • the sound-damping layer 31 is advantageously provided over the entire circumference of the jacket 28 and also advantageously over its entire height. With the sound damping layer 31, the noise during operation of the fan unit can be further reduced.
  • the diffuser attachment 22 is the same design as the embodiment according to Fig. 3 ,
  • the diffuser attachment 22 according to FIG Fig. 6 is characterized in that its jacket 28 is made of foamed material. As a result, the jacket 28 contributes to noise reduction when using the fan unit.
  • the jacket 28 is provided at its the mounting edge 20 of the diffuser 4 facing the end with recesses 32 which are distributed over the circumference of the shell 28 and open in the direction of the fastening edge 20.
  • recesses 32 are distributed over the circumference of the shell 28 and open in the direction of the fastening edge 20.
  • fasteners such as screws with which the diffuser attachment 22 can be attached to the mounting edge 20.
  • the recesses 32 are sufficiently large, so that the fastening means can be easily operated with a corresponding tool.
  • such depressions are not necessary because the mounting flange 23 of the diffuser attachment 22 projects radially beyond the jacket 28, so that the fastening means can be easily actuated.
  • the jacket 28 is curved in the illustrated embodiment in axial section to the outside.
  • the sheath made of foamed material 28 may also extend straight in the axial section obliquely outwards or be curved inwards.
  • Fig. 7 shows the possibility of the diffuser attachment 22 réellestecken on 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.
  • the individual wall sections 28a to 28c are provided at one edge with a form-fitting recess 34 and at the other edge with a corresponding projection 35.
  • the recesses 34 and projections 35 are formed so that they can not be detached from each other in the circumferential direction of the jacket 28.
  • the depressions 34 are provided in the embodiment with corresponding undercuts.
  • the connectors 33 may also be designed as a dovetail groove connections.
  • the diffuser attachment 22 can simply be mounted radially on the edge 20 of the diffuser 4 from the outside.
  • the shell sections are provided for this purpose with an U-shaped plug-in part 36 in the axial section as an interface, which extends over the circumferential length of the respective shell portion.
  • the male part 26 surrounds the rim 20 radially from the outside.
  • the edge 20 is advantageously provided with a thin, radially projecting circumferential ridge 37, on which the male part 36 can be easily attached.
  • the male part 36 is advantageously formed integrally with the jacket 28. But it can also be attached to the jacket 28, for example, be welded.
  • the recesses 34 and projections 35 are designed so that they can be joined transversely to the circumferential direction of the jacket 28.
  • the diffuser attachment 22 is the same design as the embodiment according to Fig. 3 ,
  • the diffuser attachment 22 according to FIG Fig. 8 is also the same design as the embodiment of Fig. 3 ,
  • the diffuser attachment is provided with a shock protection 38, which may be provided in different positions on the diffuser attachment 22.
  • a shock protection 38 which may be provided in different positions on the diffuser attachment 22.
  • three possible installation positions for the contact protection 38 are shown. With regard to low noise and low pressure losses, it is advantageous if the Berschreibtik 28 has the greatest possible distance from the fan 3. An optimal installation position is thus the arrangement of the contact protection 38 in the region of the outlet opening 26 of the diffuser attachment 22.
  • the contact protection 38 is formed in a known manner, for example formed by a wire or plastic mesh. It is advantageously attached to the inner wall of the shell 28 of the diffuser attachment 22 or placed behind. In each installation position, the contact protection 38 thus either does not protrude beyond the outlet opening 26 or lies in front of the outlet opening 26.
  • the contact protection 38 can be screwed on, clipped, riveted, welded or foamed.
  • Fig. 9 shows the possibility of forming the outlet opening 26 bounding the free edge 39 of the diffuser attachment 22 profiled.
  • the free edge 39 is formed like a sawtooth over its circumference.
  • the teeth 40 are of the same design and arranged over the circumference of the edge 39 at equal intervals one behind the other. This profiling contributes to a low noise of the fan unit.
  • the free edge 39 of the shell 28 of the diffuser attachment 22 is profiled wavy. It is also advantageous in such a profiling that the waves over the circumference of the shell 28 are uniform.
  • the diffuser attachment 22 of the embodiments according to FIGS Fig. 9 and 10 is the same way as the embodiment according to Fig. 3 ,
  • the described profiles of the free edge 39 may also be provided in the other embodiments of the diffuser attachment 22.
  • a sound attenuation can also be achieved by providing on the inner wall 24 of the shell 28 in the height direction extending ribs, which extend advantageously over the entire height of the shell 28 and are advantageously distributed at equal intervals over the circumference of the shell. These ribs can extend in the axial direction, but also have a slope.
  • the Fig. 11 to 14 show diffuser essays whose outlet has a square, rectangular in the embodiment outline.
  • the cross-sectional shape of the diffuser attachment from the inlet region to the outlet region changes from a circular to an angular cross-section.
  • the mounting flange 23 has a circular outline and forms, as in the other embodiments described above, the interface with which the diffuser attachment 22 can be attached to the attachment edge 20 of the diffuser 4.
  • the attachment flange 23 is adjoined by a wall section 41 which initially has a circular cross-section and merges continuously with increasing distance from the attachment flange 23 into a quadrangular outline shape.
  • the outlet opening 26 is delimited by a wall section 42, which in the exemplary embodiment has a rectangular or round outline.
  • the jacket 28 thus has a quadrangular outline over part of its height. As Fig. 11 shows, the corners of the side walls of the jacket 28 are rounded. However, the following continues to speak of a quadrangular outline. In principle, however, it is also possible for the side walls of the jacket 28 to adjoin one another with sharp edges.
  • Fig. 11 the guide vanes 17 of the stator 15 can be seen, which are fastened with one end to the jacket 30 of the receptacle 14 and with the other end to the wall portion 16 of the diffuser 4.
  • the diffuser 4 is part of the inlet nozzle 43, which is attached to the free edge 19 on a nozzle plate 44.
  • 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 region of the outlet opening 26.
  • the nozzle plate 44 and / or the outlet opening 26 can have a wide variety of outline shapes, for example square, rectangular, hexagonal or triangular outline form.
  • Fig. 12 shows by way of example that the transitions between the side walls of the jacket 28 may be at an angle to the respective radial of the diffuser attachment. These transitions between the side walls are indicated by the lines 45. The transitions are linear.
  • transitions 45 between the side walls of the jacket 28 in the polygonal cross-sectional area also over its height curved (twisted) run.
  • the curvature is provided so that the transitions 45 have a twist and follow the flow direction of the air behind the fan 3.
  • the transition regions 45 enclose an angle along their length with a radial 46 of the diffuser cap 22 that extends through the rounded corner of the shell 28.
  • the transitions 45 extend approximately from the outlet opening 26 to close to the mounting flange 23 of the diffuser attachment 22.
  • Fig. 14 shows an example of a diffuser attachment 22, which except the jacket 28 and the inner wall 27 has a circumferential partition 47.
  • the walls 27, 28, 47 have over their entire circumference distance from each other, preferably the same distance. Passages 29, 48 are thereby formed between the individual walls. The sucked by the fan 3 air enters the two passages 29, 48, each of which is annular.
  • the inner wall 27 can be firmly connected, for example, with the intermediate wall 47 in a suitable manner.
  • the walls 27, 28, 47 extend at least approximately parallel to one another. Depending on the application of the fan unit, the walls can also be provided so that they do not run parallel to each other.
  • the walls 27, 28, 47 have the same height.
  • the walls can also be different heights. So the height of the walls can increase or decrease from outside to inside. But it can also be two of the same height walls and the third wall higher or shorter than the other two walls. Thus, by choosing the height of the individual walls, the most favorable flow ratio can be set.
  • All three walls 27, 28, 47 are formed so that they have in the connection region to the diffuser 4 circular cross-section, which then merges steadily into the polygonal cross section of the individual walls.
  • the transitions 45 between the sides of the walls in the example case are curved along their length, similar to the diffuser attachment 22 according to FIG Fig. 13 , It is of course possible to provide the tortuous transitions 45 only on one wall or on two walls of the diffuser attachment 22. Then, in conjunction with the outline design of the walls 27, 28, 47 an optimal adaptation to the respective desired flow conditions can be achieved.
  • transitions 45 may also be straight, as in the embodiment according to Fig. 12 is provided.
  • the transitions may lie in the respective radials passing through the corner of the walls, but may also run at an angle to this radial.
  • the diffuser attachment 22 if it has one or two further walls, can be made relatively short.
  • the air conveyed by the fan 3 passes into the annular passages 29, 48.
  • the flow cross-section of these passages initially decreases in the flow direction, as a result of which the air is accelerated in this region. This leads to a homogenization of the air flow. Subsequently, the air flow with lower Losses are delayed, resulting in a high efficiency of the diffuser attachment 22 results.
  • the flow cross section of the passages 29, 48 in the direction of the outlet opening 26 increases again, preferably steadily.
  • the drive motor 13 is housed, if it is an internal rotor motor. If an external rotor motor is used for the fan 3, a terminal box or the corresponding electronics are arranged in the receptacle 14.
  • the diffuser 4 with the diffuser attachment 22 can be used for a wide variety of applications, for example evaporators, condensers, air coolers, recoolers and the like.
  • the diffuser attachment 22 is a simple and inexpensive to manufacture component that can be added later to the diffuser 4 at any time.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cookers (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Food-Manufacturing Devices (AREA)
  • Motor Or Generator Cooling System (AREA)
EP13004754.1A 2012-10-05 2013-10-02 Unité de ventilateur Active EP2716916B8 (fr)

Priority Applications (1)

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

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012019795.0A DE102012019795A1 (de) 2012-10-05 2012-10-05 Ventilatoreinheit

Publications (4)

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

Family

ID=49382164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13004754.1A Active EP2716916B8 (fr) 2012-10-05 2013-10-02 Unité de ventilateur

Country Status (4)

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

Cited By (1)

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CN113623249A (zh) * 2021-08-26 2021-11-09 西安交通大学 一种采用矩形出口扩散筒内设隔板的并联式高效轴流风机

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DE102018127718A1 (de) * 2018-11-07 2020-05-07 ebm-papst AB Luftleitanordnung für eine Lüftungsanlage
DE102018128811A1 (de) * 2018-11-16 2020-05-20 Ebm-Papst Mulfingen Gmbh & Co. Kg Variabel mit unterschiedlichen Düsen kombinierbarer Diagonalventilator
DE102021107361A1 (de) 2021-03-24 2022-09-29 Ebm-Papst St. Georgen Gmbh & Co. Kg Mehrstufiger Axiallüfter

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ES2953109T3 (es) 2023-11-08
EP2716916A3 (fr) 2014-09-10
EP2716916B8 (fr) 2023-08-02
SI2716916T1 (sl) 2023-10-30
EP2716916B1 (fr) 2023-05-10
DE102012019795A1 (de) 2014-04-10

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