EP3833873A1 - Luftleitanordnung für eine lüftungsanlage - Google Patents
Luftleitanordnung für eine lüftungsanlageInfo
- Publication number
- EP3833873A1 EP3833873A1 EP19795195.7A EP19795195A EP3833873A1 EP 3833873 A1 EP3833873 A1 EP 3833873A1 EP 19795195 A EP19795195 A EP 19795195A EP 3833873 A1 EP3833873 A1 EP 3833873A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flow
- arrangement according
- section
- cross
- air
- 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.)
- Pending
Links
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
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
-
- 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
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
- F04D29/4253—Fan casings with axial entry and discharge
-
- 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
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
-
- 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
- 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 an air guiding arrangement designed for a ventilation system with a housing forming a flow channel, in which a fan for generating an air flow through the flow channel of the housing is arranged.
- the post-treatment of the flow can take place through a spiral pressure chamber around the impeller.
- the pressure chamber can also be divided into several parts and have several outlets distributed over the circumference.
- this requires an increased installation space and is unsuitable for air guiding arrangements with a flow channel in which the air is conveyed along an axial direction parallel to the direction of rotation of the fan.
- an air guiding arrangement is proposed for a ventilation system, which comprises a housing forming a flow channel, in which a fan, in particular a radial or diagonal fan, is arranged for generating an air flow through the flow channel of the housing.
- a flow control device which directly influences the air flow generated by the fan, is arranged axially downstream of the fan in the flow channel of the housing.
- the flow guide device has an axis-central through-opening which is delimited by a tubular element extending parallel to the flow direction and around which a plurality of separate flow segments are formed, distributed uniformly in the circumferential direction.
- the flow segments are separated from each other in terms of flow technology in the circumferential direction by flow guide elements which extend radially outward from the tubular element.
- a basic idea of the invention consists in the fact that the Influencing the air flow via the downstream flow control device so that the existing swirl of the flow is reduced, thereby reducing the noise level and increasing efficiency.
- the pressure-side turbulent flow generated by the fan is shifted in the direction of laminar flow and the dynamic pressure is changed to static pressure.
- a through opening is generated about the axis of rotation of the fan wheel of the fan, on the other hand, the separate flow segments adjoin the pipe element radially on the outside, which influence the flow near the inner wall of the flow channel via the flow control elements.
- the flow guide device comprises an outer wall which is closed in the circumferential direction and which encloses and delimits the flow segments radially on the outside according to an outer casing.
- the flow segments are thus determined on the inside by the tubular element and on the outside by the outer wall, wherein at least one flow guide element extends through each flow segment and acts on the flow generated by the fan.
- the flow guiding elements are designed as a kind of baffle plates and, seen in a radial cross section, have a straight, a curved or a partly straight, partly curved course.
- a special exemplary embodiment provides that the flow guide elements, as seen in the radial cross section, are designed to be straight on a first edge section and curved on a second edge section. The transition between the individual sections is preferably continuous.
- an embodiment is favorable in which the flow guide elements, as seen in radial section, each have an airfoil shape, that is to say they are curved concavely and the flow around the concavely curved part of the flow guide elements is guided.
- the flow guide device of the air guide arrangement can be adapted to different cross sections of the flow channel and is characterized in that an effective flow cross-sectional area of the individual flow segments varies.
- the "effective flow cross-sectional area" is determined by the freely flowable axial cross-sectional area in the flow channel.
- the flow segments in the corners can have an enlarged flow cross-sectional area. This can be adjusted via the shape of the tubular element and the outer wall.
- an embodiment of the air guiding arrangement is favorable in which the flow guiding elements continuously extend from the tubular element radially outward to the outer wall and in the axial flow direction completely through the flow guiding device. There are therefore no additional noises within the individual flow guide elements.
- the tube element preferably has a cylindrical, square or octagon-shaped cross section, as seen in the axial cross section.
- the shape of the individual flow segments can thus be varied as required.
- the flow guide device is preferably designed as a cuboid, which can be installed as a component in the housing.
- the flow guide device is preferably formed in one piece.
- the air guiding arrangement is further characterized in one exemplary embodiment by the fact that a sum of the effective flow cross-sectional area of all flow segments is 50-90% of a total
- Flow cross-sectional area of the flow channel determined.
- the air guiding arrangement that between the flow guiding device and an inner wall of the Flow channel a distance is provided.
- the flow can thus flow to a certain extent outside the flow guide device in the flow channel.
- the distance is preferably set such that it corresponds to up to 50% of a radial height of the flow segments.
- the term “radial” also applies if the direction perpendicular to the axial flow direction within the flow channel, ie from the axial center of the flow channel towards the outside towards the housing.
- the flow guide elements are also defined with regard to their geometric length, their axial extent preferably being in a range of 15-150% of an axial maximum cross section of the flow channel.
- the air guiding arrangement provides that a guiding device enclosing the fan is provided in the flow duct, which extends from an axial inlet of the flow duct to an inner wall delimiting the flow duct, so that the effective flow cross section of the flow duct extends in the direction of flow enlarged.
- the air guiding device already influences the flow in the area of the fan and interacts with the flow guiding device connected downstream on the pressure side in order to solve the task even better.
- Favorable versions of the guide device are characterized in that, seen in radial cross section, they have a round, angled or multiple angled cross section.
- the guidance device increases the effective
- Fig. 1 is a sectional view through an air guide arrangement in a first Embodiment
- FIG. 2 shows a perspective view of a flow guide device in a first exemplary embodiment
- Fig. 3 is a perspective view of a flow guide in a second embodiment
- Fig. 4 is a perspective view of a flow guide in a third embodiment
- Fig. 5 is a sectional view through an air guide arrangement in a second
- Fig. 6 is a sectional view through an air guide arrangement in a third
- Fig. 7 is a sectional view through an air guide arrangement in a fourth
- FIG. 8 shows a schematic view of a flow segment of a flow guide device in a first embodiment
- FIG. 9 is a schematic view of a flow segment of a flow control device in a second embodiment
- FIG. 10 shows a schematic view of a flow segment of a flow guide device in a third embodiment
- FIG. 11 shows a selection of cross-sectional shapes of the flow guide elements that can be used.
- the air guide arrangement 1 comprises a housing 3 which forms the flow channel 2 and in which a fan 4 for generating the air flow through the flow channel 2 of the housing 3 is arranged.
- the fan 4 is designed as a radial fan, axial fan or diagonal fan and generates a flow from the inlet 13 in the axial direction AR through the flow channel 2.
- the fan 4 has a fan wheel rotating about the axis of rotation RA, by means of which air is sucked in axially and axially, diagonally or is blown out radially.
- the flow is deflected from the radial direction RR into the axial direction AR.
- the flow guide device 5 is arranged downstream of the fan 4 in the flow channel 2, which directly influences the air flow generated by the fan 4 in order to reduce the swirl of the flow.
- the flow guide 5 is arranged in the axial direction AR immediately adjacent to the fan 4.
- the flow guide device 5 extends to an inner wall 20 of the flow channel 2 formed by the housing 3.
- FIGS. 2-4 Exemplary embodiments of the flow guiding device 5 are shown in FIGS. 2-4.
- the flow guide device 5 is formed by a tubular element 6, seen in axial section, which is enclosed by an outer wall 10, seen in axial section. Between the tubular element 6 and the outer wall extend eight flow guide elements 9, which are distributed uniformly in the circumferential direction and which limit eight axially flowable flow segments 8 around an axis-central through opening 7 produced by the tubular element 6.
- the flow generated by the fan 4 is influenced by each of the elements tubular element 6, outer wall 10 and in particular flow guide elements 9.
- the embodiment according to FIG. 3 differs from the embodiment according to FIG. 2 in that it has an octagon-shaped axial cross section of the tubular element 6 and the connection to the flow guide elements 9, which results from this somewhat differently, exclusively at surface sections of the tubular element 6.
- the embodiment according to FIG. 3 differs from the exemplary embodiments according to FIGS. 2 and 3 through a round cross section of the tubular element 6 are otherwise the same.
- All flow guide devices 5 according to FIGS. 2-4 are, as a whole, cuboid and fit in the correspondingly shaped flow channel 2.
- a first embodiment of the guide device 14 positioned in the flow channel 2 around the fan 4 is also shown.
- the guide device which is preferably produced via sheet metal, extends in a round cross-section from the axial inlet 13 of the flow channel 2 to the inner wall 20 delimiting the flow channel 2, and increases the effective cross-section of the flow channel 2 in the flow direction towards the flow guide device 5.
- the figures 6 and 7 show further embodiment variants in this regard with a multi-angled or straight cross section of the guide device 14.
- the sum of the effective flow cross-sectional area of all flow segments 8 determines approximately 60% of the total flow cross-sectional area of the flow channel 2.
- the axial extent of the flow guide device 5 and therefore of the flow guide elements 9 is approximately 50% of the axial cross section the flow channel 2.
- FIG. 7 shows a variant of a flow guide device 5 in which its radial extent is less than the cross-sectional area of the flow channel 2 through which the flow flows, so that the outer wall 10 of the flow guide device 5 is spaced apart from the inner wall 20 of the flow channel 2 by a distance A.
- the flow can thus radially outside on the flow Flow guide device 5 and flow around the outer wall 10. From the stand A is about 50% of the radial height B starting at the flow segments 8 to the inner wall 20 of the flow channel 2 corresponds.
- the flow guide elements 9 are each shown as straight in FIGS. 2-4.
- the alternative solutions according to FIGS. 8-10 can be integrated into these design variants, in which the flow guide elements 9 have two edge sections 11, 12 and, according to FIG. 8, one section 11 is bent in a radial cross-section, as seen in FIG.
- the inflow side is on the left-hand side and the outflow side of the flow-guide device 5 on the right-hand side.
- FIG. FIG. 10 shows a variant with an inclined flow guide element 9, which, however, runs in a straight line at the edge sections 11, 12.
- the corresponding designs are integrable into all flow segments 8 of the designs according to FIGS. 2-4, even if this is not shown separately.
- FIGS. 11a-11c A selection of the cross-sectional shapes of the flow guiding elements 9 that can be used according to the invention is shown schematically in FIGS. 11a-11c, FIG. 11a being a defined curve, FIG. 11b being a curve with a straight line adjoining it in the flow direction, FIG. 11c being a kinked shape and FIG Form with a straight line in the flow direction.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018127718.0A DE102018127718A1 (de) | 2018-11-07 | 2018-11-07 | Luftleitanordnung für eine Lüftungsanlage |
PCT/EP2019/079379 WO2020094443A1 (de) | 2018-11-07 | 2019-10-28 | Luftleitanordnung für eine lüftungsanlage |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3833873A1 true EP3833873A1 (de) | 2021-06-16 |
Family
ID=68387330
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19795195.7A Pending EP3833873A1 (de) | 2018-11-07 | 2019-10-28 | Luftleitanordnung für eine lüftungsanlage |
Country Status (4)
Country | Link |
---|---|
US (1) | US11913471B2 (de) |
EP (1) | EP3833873A1 (de) |
DE (1) | DE102018127718A1 (de) |
WO (1) | WO2020094443A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115013339B (zh) * | 2022-04-29 | 2023-06-23 | 满洲里达赉湖热电有限公司 | 一种送风机入口风量调节及导向装置 |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2154313A (en) * | 1938-04-01 | 1939-04-11 | Gen Electric | Directing vane |
US3329415A (en) | 1964-12-21 | 1967-07-04 | Chicago Eastern Corp | Blower cooler |
US3412929A (en) * | 1966-12-06 | 1968-11-26 | Greenheck Fan & Ventilator Cor | Inline centrifugal fan |
US4548548A (en) * | 1984-05-23 | 1985-10-22 | Airflow Research And Manufacturing Corp. | Fan and housing |
DE3706772A1 (de) | 1987-03-03 | 1988-09-15 | Gebhardt Gmbh Wilhelm | Ventilatoreinheit und verfahren zur herstellung der leitschaufeln einer solchen ventilatoreinheit |
US5342167A (en) * | 1992-10-09 | 1994-08-30 | Airflow Research And Manufacturing Corporation | Low noise fan |
US5466120A (en) * | 1993-03-30 | 1995-11-14 | Nippondenso Co., Ltd. | Blower with bent stays |
US5951245A (en) * | 1997-10-06 | 1999-09-14 | Ford Motor Company | Centrifugal fan assembly for an automotive vehicle |
KR100548036B1 (ko) * | 1998-12-31 | 2006-05-09 | 한라공조주식회사 | 축류팬용 안내깃과 그 안내깃을 구비한 축류팬 슈라우드 조립체 |
TWI220919B (en) * | 2003-07-31 | 2004-09-11 | Sunonwealth Electr Mach Ind Co | Airflow guiding structure for a heat dissipating fan |
US7334988B2 (en) * | 2003-08-19 | 2008-02-26 | Sunonwealth Electric Machine Industry Co., Ltd. | Airflow guiding structure varying in inclinations of air-guiding rings for a heat-dissipating fan |
US20050186070A1 (en) * | 2004-02-23 | 2005-08-25 | Ling-Zhong Zeng | Fan assembly and method |
US6997678B2 (en) * | 2004-03-05 | 2006-02-14 | Asia Vital Component Co., Ltd. | Heat dissipation fan with flow guide device |
US8057161B2 (en) * | 2006-09-05 | 2011-11-15 | Ebm-Papst St. Georgen Gmbh & Co. Kg | Fan with integrated nonreturn flaps |
JP2008261280A (ja) * | 2007-04-12 | 2008-10-30 | Nippon Densan Corp | 軸流ファン |
DE102010051759A1 (de) * | 2010-11-17 | 2012-05-24 | Evg Lufttechnik Gmbh | Axiallüfter mit nachgeschaltetem Leitapparat und einer Einrichtung zur Vergleichmäßigung der Strömungsgeschwindigkeit |
KR101434891B1 (ko) * | 2012-09-19 | 2014-08-27 | 백성기 | 농산물 건조기용 정역방향 송풍팬 |
DE102012019795A1 (de) * | 2012-10-05 | 2014-04-10 | Ziehl-Abegg Ag | Ventilatoreinheit |
USD703310S1 (en) * | 2013-02-22 | 2014-04-22 | Precision Small Engine Company, Inc. | Fan guide |
US10024329B2 (en) * | 2013-12-24 | 2018-07-17 | Greenheck Fan Corporation | Fan assembly |
DE202016101765U1 (de) | 2016-04-04 | 2016-06-14 | Trox Gmbh | Komponente für eine raumlufttechnische Lüftungsanlage |
DE202016105863U1 (de) * | 2016-10-19 | 2016-11-10 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Ventilator mit Ventilatorrad und Leitrad |
DE202017101353U1 (de) * | 2017-03-07 | 2017-05-09 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Luftleitanordnung |
-
2018
- 2018-11-07 DE DE102018127718.0A patent/DE102018127718A1/de active Pending
-
2019
- 2019-10-28 EP EP19795195.7A patent/EP3833873A1/de active Pending
- 2019-10-28 WO PCT/EP2019/079379 patent/WO2020094443A1/de unknown
- 2019-10-28 US US17/285,702 patent/US11913471B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
WO2020094443A1 (de) | 2020-05-14 |
DE102018127718A1 (de) | 2020-05-07 |
US11913471B2 (en) | 2024-02-27 |
US20210340995A1 (en) | 2021-11-04 |
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