EP3334942B1 - Hotte avec une ventilateur diagonal - Google Patents

Hotte avec une ventilateur diagonal Download PDF

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Publication number
EP3334942B1
EP3334942B1 EP17719544.3A EP17719544A EP3334942B1 EP 3334942 B1 EP3334942 B1 EP 3334942B1 EP 17719544 A EP17719544 A EP 17719544A EP 3334942 B1 EP3334942 B1 EP 3334942B1
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EP
European Patent Office
Prior art keywords
cross
axial
extraction device
flow
set forth
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
EP17719544.3A
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German (de)
English (en)
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EP3334942A1 (fr
Inventor
Daniel Gebert
Jens Müller
Oliver Haaf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ebm Papst Mulfingen GmbH and Co KG
Original Assignee
Ebm Papst Mulfingen GmbH and Co KG
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Application filed by Ebm Papst Mulfingen GmbH and Co KG filed Critical Ebm Papst Mulfingen GmbH and Co KG
Publication of EP3334942A1 publication Critical patent/EP3334942A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/06—Helico-centrifugal 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
    • 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
    • F04D17/165—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
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/663—Sound attenuation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes

Definitions

  • the invention relates to an extractor device with an intake area and a flow channel which is connected to the intake area in the direction of flow and has an outlet opening for blowing out the extracted air.
  • the outlet port is usually followed by a pipe that can be routed to an area outside the building.
  • Vapor extraction devices with an intake area, in which grease filters are usually integrated, and a flow channel connected thereto are known from the prior art.
  • the installation space available for the fan is extremely limited due to the flow channel, which is usually narrow for design reasons.
  • the large suction area covers the cooker underneath the extractor hood.
  • the air drawn in via the intake area is channeled into the much narrower flow channel, so that a significant proportion of the flow from the intake area enters the flow channel from the side and is deflected for the first time in an axial direction, ie in the center direction of the exhaust channel.
  • the centrifugal fan draws in air radially from the flow channel and blows it out axially.
  • the air is deflected at right angles for the second time. Any deflection of the air volume flow results in further pressure losses and thus reduced efficiency, since the fan output has to be adjusted.
  • the invention is therefore based on the object of providing an extractor device which, with the same extraction capacity, ensures lower power consumption and optionally reduced noise generation.
  • a fume extraction device with an intake area, a flow channel which is connected to the intake area in the direction of flow and is flow-connected, and an outlet opening proposed, wherein a suction cross-sectional area is larger than a flow channel cross-sectional area and an outlet opening cross-sectional area is smaller than the flow channel cross-sectional area.
  • a diagonal fan with an axial inlet and an axial outlet is arranged in the flow channel, which during operation draws in air axially from the flow channel via the axial inlet and blows it out axially via the axial outlet into the outlet opening flow-connected to the outlet.
  • the use of the diagonal fan in the flow channel advantageously results in a reduction in pressure loss of 40-60% compared to conventionally used radial fans. Deflection losses and power consumption are reduced accordingly. In addition, the generation of noise is reduced, since the flow, once it has entered the flow channel, does not undergo any further change of direction up to the outlet.
  • the advantageous flow control in the vapor extraction device is made possible by the diagonal fan with axial inlet and axial outlet.
  • an outlet cross-sectional area of the diagonal fan corresponds to the outlet opening cross-sectional area.
  • the diagonal fan is mounted with its outlet directly on the outlet opening, in particular, in order to provide a flush transition between the outlet on the fan and the outlet opening on the flow duct.
  • the diagonal fan is often connected directly to a pipe connected to the outlet opening.
  • the intake cross-sectional area is larger than the flow channel cross-sectional area by a factor of 2 to 20, preferably 3 to 10, more preferably 4 to 6.
  • Cross-sectional sizes of the flow channel that are often realized in practice are, for example, 240 mm x 240 mm.
  • outlet openings are usually set to a (pipe) diameter of 150mm.
  • the diagonal fan has a diagonal fan impeller with a surrounding cover plate.
  • the cover disk is arranged on the diagonal fan wheel on the side facing the inlet and covers the otherwise free axial fan blade edges. In a portion facing towards the inlet, the shroud runs parallel to an axial centerline detached from the fan blades.
  • an inlet nozzle which determines the axial inlet and has a flow cross-sectional area that decreases in the axial direction of flow, is arranged on the diagonal fan. It is advantageous to design the inlet nozzle in one piece with the fan housing or to define a part of the fan housing through the inlet nozzle.
  • the inlet nozzle extends in the axial direction into the diagonal fan wheel, so that an axial overlapping area is formed between the diagonal fan wheel and the inlet nozzle.
  • the inlet nozzle is surrounded at least in sections by the cover plate, in particular by the section directed towards the inlet and running parallel to the axial center line.
  • a flow-guiding preliminary guide grille is arranged on the suction side on the inlet nozzle, which contributes in particular to reducing noise emissions and minimizes disruptive low-frequency sounds.
  • the inlet nozzle has a maximum Inlet flow cross-sectional area, which determines a factor of 0.15 - 0.4 of the maximum flow channel cross-sectional area.
  • a guide wheel which determines the axial outlet and has a flow cross-sectional area that increases in the axial direction of flow, is arranged on the diagonal fan.
  • the flow cross-sectional area tapers to the outlet opening cross-sectional area.
  • the guide vane is arranged after the diagonal fan impeller and enables an increase in the axial outflow velocity. It therefore contributes to increasing the efficiency. It is also advantageous to design the guide wheel in one piece with the fan housing or to define a part of the fan housing with the guide wheel.
  • the diagonal fan has a multi-part housing, via which it is fastened to the flow duct.
  • the first part of the housing is formed by the inlet nozzle and the second part by the guide vane.
  • part of the invention is the use of a diagonal fan in an extractor device as described above.
  • the diagonal fan can include individual or all of the features disclosed, insofar as this is technically possible.
  • FIG 1 an extractor hood 200 according to the prior art with a double-flow radial fan 210 is shown schematically by way of example.
  • the air flow generated by the radial fan 210 is shown with arrows S, it being easy to see that the air flow is deflected several times.
  • figure 2 shows a fume extraction device 1 with an intake area 2, a flow-connected flow channel 3 with a square cross-section, which is directly adjacent to the intake area 2 in the direction of flow, and an outlet opening 4, which opens into a pipe 23.
  • the diagonal fan 5 is attached to the wall. The air flow generated by the diagonal fan 5 during operation is represented by the arrows P.
  • the intake area cross-sectional area of the intake area 2 is many times greater than the flow channel cross-sectional area of the flow channel 3, the outlet opening cross-sectional area of the outlet opening 4 is smaller than the flow channel cross-sectional area of the flow channel 3.
  • the diagonal fan 5 has the axial inlet 6 in the direction of the intake area 2, via which during operation Air is sucked in axially from the flow channel 3 and blown out directly into the tube 23 via the axial outlet 7 .
  • the axial outlet 7 is directly connected to the outlet opening 4 and the pipe 23 .
  • the outlet cross-sectional area of the outlet 7 of the diagonal fan 5 corresponds to that of the exhaust port cross-sectional area of the exhaust port 4.
  • the diagonal fan 5 has a structure with a motor 18 which is accommodated and fastened centrally on a motor mount 20 and around which the pressure chamber is routed.
  • the motor 18 drives a diagonal fan wheel 8 arranged upstream, which has a circumferential cover disk 9 which partially covers the axially exposed edges of the diagonal fan wheel blades 19 .
  • the cover disk 9 runs in the inlet section 21 parallel to the axial center line and obliquely outwards in the downstream direction, so that a flow space formed by the cover disk 9 and the base disk 28 merges essentially flush into the pressure space.
  • the axial inlet 6 is formed by the inlet nozzle 10, the flow cross-sectional area of which decreases in the axial direction of flow.
  • the inlet nozzle 10 has an inlet contour 24 which extends in the axial direction into the diagonal fan wheel 8 and forms the axial overlap region 11 with the inlet section 21 of the cover plate 9 .
  • a circumferential radial gap is provided between the inlet contour 24 of the inlet nozzle 10 and the inlet section 21 of the cover disk 9 .
  • the axial distance between the axial edges of the diagonal fan wheel blades 19 and the axial end of the inlet contour 24 of the inlet nozzle 10 is very small and corresponds to 10% of the axial extent of the inlet contour 24 of the inlet nozzle 10.
  • the inlet nozzle 10 forms a maximum inlet flow cross-sectional area which corresponds to 40% of the flow channel cross-sectional area.
  • the inlet nozzle 10 forms a first housing part of the diagonal fan 5.
  • the second housing part which is directly connected and fastened to the first housing part, is provided by the guide vane 12.
  • the guide vane 12 forms the axial outlet 7 and has the shape of the pressure chamber co-determining flow guide elements 22, which extend around the motor 18 to the outlet 7 and thereby in the axial direction of flow Increase flow cross-sectional area to create a venturi effect.
  • the outer housing wall of the guide vane 12 that guides the flow runs parallel to the axial center line.
  • figure 3 shows the lower pressure loss when using the in figure 2 shown diagonal fan 5 in an extractor device 1 compared to the solutions known from the prior art, with graphs 66 and 77 relating to a radial fan and a radial fan installed in an extractor device and graphs 88 and 99 relating to a diagonal fan 5 and a diagonal fan 5 in the refer to Figure 2 installed state.
  • the two graphs 88 and 99 are much closer together, especially at higher volume flows.
  • a flow guide grid can be arranged at the inlet nozzle upstream.
  • the diagonal fan can also be attached to the flow duct only on the axial side and be spaced apart from the flow duct in the radial direction.

Landscapes

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

Claims (13)

  1. Dispositif d'évacuation des émanations, comprenant une zone d'aspiration (2), un canal d'écoulement (3) suivant la zone d'aspiration (2) dans la direction d'écoulement et en communication fluidique avec celle-ci, ainsi qu'un orifice de sortie (4), une superficie de la section de la zone d'aspiration étant supérieure à une superficie de la section du canal d'écoulement, et une superficie de la section de l'orifice de sortie étant inférieure à la superficie de la section du canal d'écoulement, dans lequel un ventilateur diagonal (5), doté d'une entrée axiale (6) et d'une sortie axiale (7), est disposé dans le canal d'écoulement (3) et, en cours de fonctionnement, aspire axialement de l'air du canal d'écoulement (3) à travers l'entrée axiale (6) et l'éjecte axialement à travers la sortie axiale (7) vers l'orifice de sortie (4) en communication fluidique avec la sortie (7).
  2. Dispositif d'évacuation des émanations selon la revendication 1, caractérisé en ce qu'une superficie de la section de la sortie du ventilateur diagonal (5) correspond à la superficie de la section de l'orifice de sortie.
  3. Dispositif d'évacuation des émanations selon la revendication 1 ou 2, caractérisé en ce que la superficie de la section d'aspiration est supérieure d'un facteur de 2 à 20 à la superficie de la section du canal d'écoulement.
  4. Dispositif d'évacuation des émanations selon au moins l'une des revendications précédentes, caractérisé en ce que le ventilateur diagonal (5) présente une roue de ventilateur diagonal (8) dotée d'un disque de couverture périphérique (9).
  5. Dispositif d'évacuation des émanations selon la revendication précédente, caractérisé en ce que le disque de couverture (9) est disposé sur la roue de ventilateur diagonal (8) sur une face orientée vers l'entrée (6) du ventilateur diagonal (5).
  6. Dispositif d'évacuation des émanations selon au moins l'une des revendications précédentes, caractérisé en ce qu'une buse d'entrée (10) déterminant l'entrée axiale (6) et ayant une superficie de la section d'écoulement diminuant dans la direction d'écoulement axiale est disposée sur le ventilateur diagonal (5).
  7. Dispositif d'évacuation des émanations selon la revendication précédente, caractérisé en ce que la buse d'entrée (10) s'étend dans la direction axiale dans la roue de ventilateur diagonal (8) de façon à former une zone de chevauchement axiale (11).
  8. Dispositif d'évacuation des émanations selon la revendication précédente, caractérisé en ce que la buse d'entrée (10) est entourée au moins par endroits par le disque de couverture (9) de sorte que la buse d'entrée (10) et le disque de couverture (9) forment la zone de chevauchement (11).
  9. Dispositif d'évacuation des émanations selon l'une des deux revendications précédentes, caractérisé en ce qu'une grille directrice guidant l'écoulement est disposée au niveau de la buse d'entrée (10).
  10. Dispositif d'évacuation des émanations selon au moins l'une des revendications précédentes 6 à 9, caractérisé en ce que la buse d'entrée (10) présente une superficie de la section de l'écoulement d'entrée qui détermine un facteur de 0,15 à 0,4 de la superficie de la section du canal d'écoulement.
  11. Dispositif d'évacuation des émanations selon au moins l'une des revendications précédentes, caractérisé en ce qu'une roue directrice arrière (12) déterminant la sortie axiale (7) est disposée sur le ventilateur diagonal (5), une partie de paroi de bottier de la roue directrice arrière (12) s'étendant à la sortie (7) en parallèle à une ligne médiane axiale du ventilateur diagonal (5).
  12. Dispositif d'évacuation des émanations selon au moins l'une des revendications précédentes, caractérisé en ce le ventilateur diagonal (5) présente un boîtier en plusieurs parties qui est fixé au canal d'écoulement (3).
  13. Utilisation d'un ventilateur diagonal (5) dans un dispositif d'évacuation des émanations (1) selon l'une quelconque des revendications précédentes.
EP17719544.3A 2016-04-28 2017-04-20 Hotte avec une ventilateur diagonal Active EP3334942B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016107921.9A DE102016107921A1 (de) 2016-04-28 2016-04-28 Dunstabzugsvorrichtung mit Diagonalventilator
PCT/EP2017/059387 WO2017186565A1 (fr) 2016-04-28 2017-04-20 Dispositif d'évacuation des émnanations doté d'un ventilateur diagonal

Publications (2)

Publication Number Publication Date
EP3334942A1 EP3334942A1 (fr) 2018-06-20
EP3334942B1 true EP3334942B1 (fr) 2022-08-10

Family

ID=58632966

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17719544.3A Active EP3334942B1 (fr) 2016-04-28 2017-04-20 Hotte avec une ventilateur diagonal

Country Status (5)

Country Link
EP (1) EP3334942B1 (fr)
DE (1) DE102016107921A1 (fr)
ES (1) ES2927704T3 (fr)
PL (1) PL3334942T3 (fr)
WO (1) WO2017186565A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109973438B (zh) * 2019-04-24 2021-01-19 宁波方太厨具有限公司 一种离心风机蜗壳
AU2020233744B2 (en) * 2019-09-20 2023-06-29 ResMed Pty Ltd System and Method for Reducing Noise in a Flow Generator
SE545112C2 (en) * 2020-03-24 2023-04-04 Swegon Operations Ab Air Handling Unit comprising flow guiding stator disc
WO2022103868A1 (fr) 2020-11-10 2022-05-19 Greenheck Fan Corporation Ensemble ventilateur efficace
DE202022101494U1 (de) 2021-11-10 2022-11-03 Berbel Ablufttechnik Gmbh Dunstabzugshaube
DE102021129263A1 (de) 2021-11-10 2023-05-11 Berbel Ablufttechnik Gmbh Dunstabzugshaube

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH213309A (de) 1939-10-20 1941-01-31 Wetter Wilhelm Ventilator.
US5983888A (en) 1999-04-07 1999-11-16 Whirlpool Corporation Low noise cooker hood
CN2585086Y (zh) 2002-11-04 2003-11-05 葛德涌 一种整体式家用吸油烟机
CN102207301A (zh) 2011-06-28 2011-10-05 美的集团有限公司 吸油烟机
DE102010032168A1 (de) 2010-07-23 2012-01-26 Ruck Ventilatoren Gmbh Diagonal-Ventilator
DE102010047489A1 (de) * 2010-10-06 2012-04-12 Ruck Ventilatoren Gmbh Wandeinbaugebläse
DE102012019419A1 (de) * 2012-10-04 2014-04-10 Ruck Ventilatoren Gmbh Diagonal-Ventilator
CN104456344A (zh) 2014-12-15 2015-03-25 北京东方利禾景观设计有限公司 一种具有气幕避雨功能的景观灯
US20150139823A1 (en) * 2011-05-20 2015-05-21 Brian J. Mornan Aspirating Induction Nozzle with Flow Transition
EP2952744B1 (fr) 2014-06-02 2021-03-03 ebm-papst Mulfingen GmbH & Co. KG Ventilateur radial ou diagonal

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6752711B1 (en) * 2003-07-16 2004-06-22 Peter Yeung Motor housing for range hood

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH213309A (de) 1939-10-20 1941-01-31 Wetter Wilhelm Ventilator.
US5983888A (en) 1999-04-07 1999-11-16 Whirlpool Corporation Low noise cooker hood
CN2585086Y (zh) 2002-11-04 2003-11-05 葛德涌 一种整体式家用吸油烟机
DE102010032168A1 (de) 2010-07-23 2012-01-26 Ruck Ventilatoren Gmbh Diagonal-Ventilator
DE102010047489A1 (de) * 2010-10-06 2012-04-12 Ruck Ventilatoren Gmbh Wandeinbaugebläse
US20150139823A1 (en) * 2011-05-20 2015-05-21 Brian J. Mornan Aspirating Induction Nozzle with Flow Transition
US9897111B2 (en) 2011-05-20 2018-02-20 Dyna-Tech Sales Corporation Aspirating induction nozzle with flow transition
CN102207301A (zh) 2011-06-28 2011-10-05 美的集团有限公司 吸油烟机
DE102012019419A1 (de) * 2012-10-04 2014-04-10 Ruck Ventilatoren Gmbh Diagonal-Ventilator
EP2952744B1 (fr) 2014-06-02 2021-03-03 ebm-papst Mulfingen GmbH & Co. KG Ventilateur radial ou diagonal
CN104456344A (zh) 2014-12-15 2015-03-25 北京东方利禾景观设计有限公司 一种具有气幕避雨功能的景观灯

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
ANONYMOUS: "4 Aufbau und Funktion einer Dunstabzugshaube", HEA, 25 March 2016 (2016-03-25), XP093163684, Retrieved from the Internet <URL:https://web.archive.org/web/20160325130652/http://service.hea.de/fachwissen/dunstabzugshauben/4-aufbau-und-funktion.php>
ANONYMOUS: "Externe Motoren ", WFK KÜCHEN GMBH, 18 March 2015 (2015-03-18), XP093163697, Retrieved from the Internet <URL:https://web.archive.org/web/20150318180553/http://www.dunstabzugshauben.de/lexikon/externe-motoren>
FRANK P. BLEIER: "Fan handbook : selection, application, and design", 1 January 1998, MCGRAW HILL, ISBN: 0-07-005933-0, article BLEIER, FRANK P.: "Table of contents", pages: 1 - 1, XP009554182

Also Published As

Publication number Publication date
WO2017186565A1 (fr) 2017-11-02
PL3334942T3 (pl) 2022-10-24
DE102016107921A1 (de) 2017-11-02
EP3334942A1 (fr) 2018-06-20
ES2927704T3 (es) 2022-11-10

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