EP4180725A1 - Hotte aspirante - Google Patents

Hotte aspirante Download PDF

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Publication number
EP4180725A1
EP4180725A1 EP22202828.4A EP22202828A EP4180725A1 EP 4180725 A1 EP4180725 A1 EP 4180725A1 EP 22202828 A EP22202828 A EP 22202828A EP 4180725 A1 EP4180725 A1 EP 4180725A1
Authority
EP
European Patent Office
Prior art keywords
fan
extractor
air flow
housing
extractor hood
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
Application number
EP22202828.4A
Other languages
German (de)
English (en)
Inventor
Philipp Vernim
Simon Witte
Berthold Scholz
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.)
Berbel Ablufttechnik GmbH
Original Assignee
Berbel Ablufttechnik GmbH
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 Berbel Ablufttechnik GmbH filed Critical Berbel Ablufttechnik GmbH
Publication of EP4180725A1 publication Critical patent/EP4180725A1/fr
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • F24C15/2035—Arrangement or mounting of filters

Definitions

  • the invention relates to an extractor hood for removing cooking vapors from a hob by means of an air flow, with an extractor housing which has at least one air intake opening and at least one air outlet for the air flow, at least one fan arranged in the extractor housing for generating the air flow, and at least one fan in the Extractor housing in the air flow between the air intake opening and fan arranged separating element for separating one or more components of the cooking vapors, in particular fat and / or oil, from the air flow, wherein the air flow in the extractor housing is guided from the air intake opening via the separating element to the fan and from the fan is blown out of the flue housing via the air outlet.
  • Forward curved centrifugal fans ie centrifugal fans with forward curved blades
  • Forward-curved centrifugal fans produce a so-called blade rotation sound, which depends on the speed and number of blades of the fan. If the housing walls are at different distances, strong air vortices are also formed, which combine to form so-called vortex braids at the narrowest points. This turbulence hits the rotating impeller blades directly, resulting in a noise that includes a broadband hiss and additional narrowband, tonal sound components, which are also referred to as propeller noise or rotary noise.
  • Passive noise protection measures are often associated with large space requirements and high costs.
  • forward-curved centrifugal fans are logarithmic need widening snail housing, which takes up a relatively large amount of space in the hood housing of the extractor hoods.
  • radial fans cannot fulfill their function in the extractor hood, since the worm housing is necessary to build up a working pressure in forward-curved radial fans.
  • the object of the invention to specify an improved extractor hood which enables cooking vapors to be removed effectively and offers low noise emissions during operation. If possible, the extractor hood should also have a small footprint.
  • the inlet guide grille is advantageously designed to split up turbulence forming in the air flow in the extractor housing when it hits the inlet guide grille and weaken it as the air stream flows through the inlet guide grille.
  • the sound pressure decreases in the entire frequency range.
  • the disturbing rotary sound in the lower frequency range can be significantly reduced in this way. This results in a significantly reduced sound pressure level and the operating noise of the extractor hood that is perceived as more pleasant.
  • compromises can also be made to save installation space, which would lead to the formation of so-called vortex braids at narrower points, since these vortex braids are effectively split up and weakened by the inlet guide vane.
  • the supply guide grid is arranged on an inlet nozzle of the fan. Via the inlet nozzle, the sucked-in air of the air flow can be guided in a targeted manner from the inlet grille to the fan wheel, with turbulence on the inlet grille being effectively split up and weakened.
  • An embodiment is particularly preferred which provides that the fan is a radial fan with a backward-curved fan wheel.
  • the space requirement of the extractor hood can be easily reduced, since the backward-curved fan wheel requires less installation space than a forward-curved radial fan with a worm housing. Due to the significantly better efficiency of the backward-curved radial fans, the extraction of cooking vapors can be particularly effective. Without the logarithmically expanding worm housing, the size of the backward-curved fan wheels can also be increased, so that noise emissions during operation can also be reduced by lower fan wheel speeds. For the same working point, i.e. a conveyed volume of the air flow at a given system pressure, e.g.
  • the proposed extractor hood requires less installation space, is quieter and requires around half the power consumption compared to conventional extractor hoods with forward-curved radial fans snail shells. Since the worm housing can be dispensed with, a larger fan wheel can also be installed with the same installation space, which means that the speed can be reduced at the same operating point and the acoustic properties can thus be improved.
  • a particularly advantageous embodiment of the invention relates to the fan wheel having a diameter of at least 170 mm, preferably at least 220 mm, more preferably at least 250 mm.
  • a backward-curved fan wheel of this size cooking vapors can be extracted particularly effectively and quietly at the same time.
  • Forming vortex braids are effectively split out by the inlet guide grille and weakened, so that the use of such large fan wheels is possible without any problems even in a limited space.
  • the fan wheel can be operated at lower speeds in a smaller installation space than was previously the case.
  • a particularly advantageous embodiment of the invention provides that a pressure side of the fan forms a receiving space arranged circumferentially around the fan wheel.
  • the fan is housed in the extractor housing in a space-saving manner, with the accommodation space adjoining the fan wheel already forming the pressure side of the fan.
  • An advantageous embodiment of the invention provides that an overall height of the receiving space axially to an axis of rotation of the fan wheel corresponds to at most 1.6 times the height of the fan wheel. With such a limited accommodation space, space can be saved in the trigger housing. This allows the advantages of the backward-curved fan wheel in the extractor hood to be exploited, since no large-volume worm housing is required to build up the pressure.
  • An embodiment is particularly advantageous which provides that an overall depth of the receiving space in a first direction of expansion radially to an axis of rotation of the fan wheel corresponds to at most 1.4 times the fan wheel diameter. Installation space can be saved in the extractor hood via such a limited accommodation space. The advantages of the backward-curved fan wheel can therefore be used in the extractor hood, since no large-volume fan housing is required for the pressure build-up.
  • An advantageous embodiment provides that an overall width of the receiving space in a direction perpendicular to the first direction of expansion, second direction of expansion radially to the axis of rotation of the fan wheel corresponds to at most 1.4 times the diameter of the fan wheel.
  • Such a limited accommodation space saves a great deal of installation space in the extractor hood.
  • the advantages of the backward-curved fan wheel can therefore be used particularly well here. With the pressure build-up within the backward-curved fan impeller, there is no need for a large-volume worm housing around the fan impeller in the extractor hood.
  • the hood housing is constructed in two parts, so that a first part of the hood housing includes the separating element and a second part of the hood housing includes the fan.
  • the splitting of the extractor housing simplifies the assembly and the creation of variants for the extractor hood.
  • the arrangement of the separating element in the first part of the hood housing and the arrangement of the fan in the second part of the hood housing makes it possible to combine different first and second parts of the hood housing to form an extractor hood. In this way, different separating elements can easily be combined with different fans within the scope of creating variants to form a fume hood by connecting the parts of the fume hood housing to one another.
  • the inlet guide vane has a lattice web structure, which forms radial webs spaced apart in a circumferential direction and coaxial circumferential webs spaced apart in a radial direction, with the webs each forming guide surfaces extending in the flow direction of the air flow, with the inlet guide vane grid having a radial has an outer edge and a central middle area around a central axis of the preliminary guide cascade, and an enveloping surface spanned by the radial outer edge and the middle area is convexly curved in the radial outer edge and flat in the middle area, in particular parallel to a radial plane of the preliminary guide cascade, with the circumferential webs in the radial direction in are each arranged at a radial distance from the central axis of the preliminary guide vane and whose guide surfaces each have a varying angular position in relation to an axial plane of the preliminary guide vane.
  • the grid web structure is particularly suitable for splitting up turbulence in a space-saving and effective manner when it hits the inlet guide grille and weakening it when the air flow passes through the inlet guide grille.
  • the extractor hood achieves an improved overall static efficiency and a further reduced sound output.
  • the radial webs and peripheral webs can therefore be designed to be particularly thin-walled in cross section. This reduces the inflow area of the webs and the flow resistance generated by the webs. In addition, the formation of vortices caused by the webs themselves is prevented, which in turn would otherwise lead to noise.
  • the extractor hood 1 is used to remove cooking vapors 2 over a hob 3 by means of an air flow 4 and has a hood housing 5 which has an air intake opening 6 on the underside and an air outlet 7 for the air flow 4 on the top.
  • the extractor hood 1 is off figure 1 shown individually.
  • This representation already shows how compact the extractor housing 5 of the extractor hood 1 is.
  • the extractor hood 1 shown is particularly suitable as a built-in hood for installation in a kitchen wall unit.
  • the compact dimensions of the extractor housing 5 make it possible to use the remaining interior volume of the wall unit as additional storage space.
  • the extractor housing 5 has extremely compact dimensions, which allow a large proportion of the interior volume of the upper cabinet to be used as storage space.
  • the reasons for the compact external dimensions of the extractor housing 5 can be seen in the following views, which show the internal structure of the extractor hood 1.
  • the figure 4 shows an exploded view of the extractor hood 1 according to FIG Figures 1 to 3 .
  • a fan 8 for generating the air flow 4 ( 1 ) is arranged in operation through the extractor hood 1.
  • This fan 8 is advantageously a radial fan and has a fan wheel 12 curved backwards.
  • the extractor hood 1 requires less installation space, is quieter and consumes only about half the power of conventional extractor hoods with forward-curved radial fans in snail housings.
  • the extractor housing 5 is constructed in two parts, so that a first part 16 of the extractor housing 5 comprises a separating element 9 and a second part 17 of the extractor housing 5 comprises the fan 8. concept possible.
  • a guide grille 10 is arranged between the fan 8 and the separating element 9 in the air flow 4 .
  • This inlet guide grille 10 is designed to split up vortex braids forming in the airflow 4 in the extractor housing 5 when they hit the inlet guide grille 10 and weaken them as the airflow 4 flows through the inlet guide grille 10 .
  • the inlet guide grid 10 is preferably arranged on an inlet nozzle 11 of the fan 8 . This inlet nozzle 11 directs the sucked-in air of the air flow in a targeted manner from the air guide grille 10 into the intake area of the fan 8.
  • a funnel-shaped receptacle 24 is provided, via which the air flow 4 is channeled to the air guide grille 10.
  • FIG 5 is another exploded view of the extractor hood 1 according to Figures 1 to 4 shown. It can be seen that the second part 17 of the trigger housing 5 can be assembled from very few parts.
  • the separating element 9 in the first part 16 of the extractor housing 5 can be seen here.
  • the separating element 9 is arranged in the extractor housing 5 in the air flow 4 between the air intake opening 6 and the fan 8 and is used to separate one or more components of the cooking vapors 2 ( 1 ), in particular fat and/or oil, from the air stream 4 ( 1 ), where the air flow 4 ( 1 ) is guided in the hood housing 5 from the air intake opening 6 via the separating element 9 to the fan 8 and is blown out of the hood housing 5 by the fan 8 via the air outlet 7 .
  • the advance guide grid 10 has a grid structure. This lattice bar structure is formed by radial bars 18 spaced apart in a circumferential direction and coaxial peripheral bars 19 spaced apart in a radial direction.
  • the advance guide grid 10 has a radial outer edge 21 and a central central area 22 around a center axis 21 of the advance guide grid 10 .
  • the enveloping surface spanned by the radial outer edge 21 and the central area 22 is convexly curved in the radial outer edge 21 and flat in the central area 22 , in particular parallel to a radial plane of the preliminary guide grid 10 .
  • the peripheral webs 19 are each arranged at a radial distance from the central axis 23 of the preliminary guide vane 10 .
  • the guide surfaces 20 of the peripheral webs 19 each have a varying angular position in relation to an axial plane of the preliminary guide grid 10 .
  • This lattice structure especially the vortex braids are split up in a space-saving and effective manner when they hit the preliminary guide grille 10 and are weakened when the air flow 4 flows through the preliminary guide grille 10, which leads to an improved overall static efficiency and a reduced sound output of the extractor hood 1.
  • the convex enveloping surface in the radial outer area 21 improves the strength and stability of the curved shape of the guide vane cascade 10.
  • the radial webs 18 and peripheral webs 19 can therefore be designed with particularly thin walls in cross section, which reduces the inflow area of the webs 18, 19 and the flow resistance through the webs 18 , 19 decreased.
  • the pressure side of the fan 8 is formed by a receiving space 14 arranged circumferentially around the fan wheel 12 .
  • the fan 8 is thus built around the receiving space 14 in the extractor housing 5 to save space, so that the receiving space 14 adjoining the fan wheel 12 already forms the pressure side of the fan 8 .
  • the receiving space 14 preferably has an essentially rectangular basic shape. If the distance chosen between the backward-curved fan wheel 12 and a wall delimiting the receiving space 14 is too small, disturbing noises arise.
  • the walls circumferentially spaced apart from the fan wheel 12 are advantageously arranged sufficiently spaced apart from the fan wheel.
  • the fan wheel 12 advantageously has a diameter ld of at least 170 mm, preferably at least 220 mm, more preferably at least 250 mm.
  • the receiving space 14 advantageously has an overall height bh axially to the axis of rotation 15 of the fan wheel 12, which corresponds at most to 1.6 times the fan wheel height lh.
  • the overall depth bt of the receiving space 14 in a first direction of expansion radially to an axis of rotation 15 of the fan wheel 12 can correspond to at most 1.4 times the fan wheel diameter ld.
  • the overall width bb of the receiving space 14 in a second direction of expansion perpendicular to the first direction of expansion, radially to the axis of rotation 15 of the fan wheel 12, can also correspond to at most 1.4 times the fan wheel diameter ld.
  • Such a limited accommodation space 14 in the trigger housing 5 very easily saves installation space.
  • the advantages of the backward-curved fan wheel 12 in the extractor hood 1 can be optimally utilized, since no large-volume worm housing is required to build up the pressure.
  • the figure 6 also allows a look at the Residual oil separator 25 of the separating element 9 and the fat collecting tray 26 of the separating element 9 arranged underneath.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ventilation (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP22202828.4A 2021-11-10 2022-10-20 Hotte aspirante Pending EP4180725A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021129263.8A DE102021129263A1 (de) 2021-11-10 2021-11-10 Dunstabzugshaube

Publications (1)

Publication Number Publication Date
EP4180725A1 true EP4180725A1 (fr) 2023-05-17

Family

ID=83903097

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22202828.4A Pending EP4180725A1 (fr) 2021-11-10 2022-10-20 Hotte aspirante

Country Status (2)

Country Link
EP (1) EP4180725A1 (fr)
DE (1) DE102021129263A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2159493A2 (fr) * 2008-09-01 2010-03-03 BSH Bosch und Siemens Hausgeräte GmbH Dispositif d'évacuation des fumées
US20110036340A1 (en) * 2009-08-17 2011-02-17 Ming-Hung Chu High efficiency range hood
EP3037671A1 (fr) * 2014-12-22 2016-06-29 Indesit Company S.p.A. Dispositif d'aspiration destiné à une hotte, équipé d'un connecteur électrique
WO2016116871A1 (fr) * 2015-01-22 2016-07-28 Elica S.P.A. Grille d'aspiration pour guide d'air d'une hotte domestique, guide d'air présentant ladite grille et hotte domestique présentant ledit guide d'air
EP3225920A1 (fr) * 2016-03-31 2017-10-04 BSH Hausgeräte GmbH Hotte aspirante
CN108980947A (zh) * 2018-09-27 2018-12-11 佛山市顺德区美的洗涤电器制造有限公司 吸油烟机
WO2021093068A1 (fr) * 2019-11-11 2021-05-20 佛山市顺德区美的洗涤电器制造有限公司 Couvercle à grille, ventilateur et hotte aspirante

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29513292U1 (de) 1995-08-18 1996-12-19 Gutmann Gmbh Dunstabzugselement
DE102016107921A1 (de) 2016-04-28 2017-11-02 Ebm-Papst Mulfingen Gmbh & Co. Kg Dunstabzugsvorrichtung mit Diagonalventilator
DE102017209291A1 (de) 2017-06-01 2018-12-06 Ziehl-Abegg Se Ventilator und Vorleitgitter für einen Ventilator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2159493A2 (fr) * 2008-09-01 2010-03-03 BSH Bosch und Siemens Hausgeräte GmbH Dispositif d'évacuation des fumées
US20110036340A1 (en) * 2009-08-17 2011-02-17 Ming-Hung Chu High efficiency range hood
EP3037671A1 (fr) * 2014-12-22 2016-06-29 Indesit Company S.p.A. Dispositif d'aspiration destiné à une hotte, équipé d'un connecteur électrique
WO2016116871A1 (fr) * 2015-01-22 2016-07-28 Elica S.P.A. Grille d'aspiration pour guide d'air d'une hotte domestique, guide d'air présentant ladite grille et hotte domestique présentant ledit guide d'air
EP3225920A1 (fr) * 2016-03-31 2017-10-04 BSH Hausgeräte GmbH Hotte aspirante
CN108980947A (zh) * 2018-09-27 2018-12-11 佛山市顺德区美的洗涤电器制造有限公司 吸油烟机
WO2021093068A1 (fr) * 2019-11-11 2021-05-20 佛山市顺德区美的洗涤电器制造有限公司 Couvercle à grille, ventilateur et hotte aspirante

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Publication number Publication date
DE102021129263A1 (de) 2023-05-11

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