EP3163175A1 - Hotte filtrante avec filtres orientés vers le ventilateur - Google Patents

Hotte filtrante avec filtres orientés vers le ventilateur Download PDF

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Publication number
EP3163175A1
EP3163175A1 EP16196357.4A EP16196357A EP3163175A1 EP 3163175 A1 EP3163175 A1 EP 3163175A1 EP 16196357 A EP16196357 A EP 16196357A EP 3163175 A1 EP3163175 A1 EP 3163175A1
Authority
EP
European Patent Office
Prior art keywords
filtering
hood
suction unit
unit
fluid
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
EP16196357.4A
Other languages
German (de)
English (en)
Other versions
EP3163175B1 (fr
Inventor
Danilo Poser
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.)
FALMEC SpA
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FALMEC SpA
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Publication date
Application filed by FALMEC SpA filed Critical FALMEC SpA
Publication of EP3163175A1 publication Critical patent/EP3163175A1/fr
Application granted granted Critical
Publication of EP3163175B1 publication Critical patent/EP3163175B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F24C15/2035—Arrangement or mounting of filters

Definitions

  • the present invention relates to the field of filtering hoods, particularly of the type used in kitchens for treating cooking smoke and odors.
  • the present invention particularly relates to filtering hoods equipped with filtering panels according to the preamble of claim 1.
  • Filtering hoods for kitchens are a type of air treatment hoods. These hoods are characterized by reintroducing sucked air, once sanitized and purified through suitable filters, inside the same environment from where it has been drawn out.
  • Current filtering hoods provide the sucked air, before being reintroduced in the environment, to run through a path, specifically a manifold, channeling it into chambers provided with outlet surfaces where filtering elements are arranged.
  • the filtration efficiency of the hood is reduced since filtering elements are provided only on outlets that are provided downstream such channels, resulting in possible particulate deposits inside the hood and consequent malfunctions.
  • a further drawback is that the air flow runs through such channels for the whole length thereof before being expelled from the hood, air being accelerated up to turbulence speed conditions that generate undesired noise when in use.
  • the most recent filtering hoods provide the possibility of inserting therein suitable sound absorbing devices, but such solution does not guarantee a suitable acoustic insulation.
  • the application of such devices is a bulky solution weighing down the hood both from a structural perspective and from an aesthetic perspective.
  • the idea at the base of the present invention provides to make a filtering hood comprising a box body providing a suction inlet and a suction unit to suck a fluid from the suction inlet.
  • the suction unit comprises a centrifugal fan that draws fluid from the suction inlet and expels it through the lateral surfaces with which it is provided.
  • the hood further comprises a filtering unit to filter the fluid expelled from the suction unit and to retain impurities present in such fluid. More in details, the filtering unit is arranged along a curved portion provided with concavity facing the lateral surfaces of the suction unit.
  • the fluid expelled from the suction unit through its lateral surface is directed towards said curved portion provided with concavity facing the lateral surface thereof; more precisely the fluid expelled from the suction unit through its lateral surface is neither conveyed in a connecting duct for being transferred from the suction area to the filtering area of the hood, nor it is let free to flow, that is directly towards the filtering elements, but it travels along the curved portion and is directed towards the filtering elements, also arranged in a curved manner about the lateral surface of the suction unit.
  • Fig.1 shows an exploded view of a filtering hood 1 according to the invention.
  • the hood 1 comprises a suction inlet 2 (visible in fig.5 ) and a box body 10, inside which a suction unit 20 is housed (visible more in details in Fig.4 ).
  • the box body 10 acts for covering some components of the hood, and in some variants, it may have a shape different from that of fig. 1 or, it may be even omitted.
  • the suction unit 20 is a centrifugal fan comprising an electric motor 21 on which an impeller 22 is fitted, whose rotation allows a fluid to be sucked from the suction inlet 2.
  • the suction unit 20 further provides a circular shaped upper surface 23, on which holes 231 are formed.
  • the upper surface 23 acts as a support where the electric motor 21 is fastened, for example by means of tightening screws inserted into the holes 231, screwed in respective seats present in the motor frame.
  • the impeller 22 has the shape of a circular base right prism whose lateral surface 200 is provided with a plurality of blades 223, which are equally spaced along such surface and such to define, therebetween, a plurality of slits 224, developing parallel to the axis of rotation of the impeller and allow air to pass.
  • blades 223 of the impeller are arranged in proximity of the perimetral circumference of such prism, such to define an inner chamber 222 intended to house the electric motor 21.
  • the suction unit 20 is a block removable from the box body 10, such that, when needed, maintenance of the motor or replacement of the impeller can be performed.
  • the air sucked by the inlet 2 due to the rotational motion of the impeller 22, flows firstly in the chamber 222 from where then is expelled, through the slits 224, with a trajectory that substantially lies on a plane orthogonal to the axis of rotation of the impeller.
  • a perforated panel 11 is interposed, having a flat shape and preferably with a circular geometry and made of a metal material, which acts as a filter for grease particles suspended in the sucked air.
  • the perforated panel 11 is supported by supporting bases of a support element 110 fastened to opposite lateral walls of the box body 10, and it is removable when needed such to clean or replace it.
  • the support element 110 on the contrary surrounds the perforated panel 11 and, between the box body 10 and the supporting element 110 panels 13a are interposed preferably made of a material transparent to light, such as for example glass.
  • a light beam emitted by LED strips 13 arranged in a recess of the supporting element 110 can pass through the panels 13a and illuminate a cooking top (not shown) installed underneath the hood 1.
  • the hood 1 further comprises a filtering unit 30 inserted in the box body 10.
  • the filtering unit 30 comprises an enclosure comprising a circular perimetral wall 30a fastened at the bottom to a base 30b provided with a plurality of openings (30c,30d) and at the top by an upper plate 300.
  • the base 30b is circular and it comprises a concentric circular opening 30c intended to receive the suction unit 20 that, in the installed condition, rises from the surface containing the base 30b for the height of the lateral surface 220 of the impeller 22.
  • a wall 301 vertically rises from the base 30b, provided with an inner surface 301a facing the suction unit 20 and, developed by following a spiral path, with the center in the geometric center of the circular opening 30c, surrounding the suction unit 20.
  • such wall runs a spiral path for such a portion that its final end 303 is substantially radially aligned with its initial end 302.
  • such portion can have a lower or even longer length.
  • the filtering unit 30 comprises one or more consecutive panels 31, preferably with a geometry as a circumference arc, provided with a surface 31a made of a perforated sheet facing the suction unit 20 and arranged concentrically and outside the latter, such to form a first array.
  • each one of them is spaced from an adjacent panel such that a second array of panels defines a plurality of chambers 32 between the first and the second arrays, each one intended to contain filtering material, such as for example washable polyurethane impregnated with activated carbon or zeolite.
  • filtering material such as for example washable polyurethane impregnated with activated carbon or zeolite.
  • the inner surface of the wall 301 and the surfaces 31a made of perforated sheet of the innermost array of the plurality of panels 31, on the contrary define the lateral walls of a duct 305 which is run by the air flow sucked by the suction unit 20.
  • the sucked air flow namely firstly runs through the spiral portion and then it passes through the surfaces 31a made of perforated sheet such to be filtered.
  • the chambers 32 are further closed at the top and at the bottom by respective panels 320, such that two adjacent arrays of panels 31 can be removably fastened to the base, at slots 30d formed thereon.
  • the chamber 32 defined by the panels 31 is a block removable such to replace, when needed, the filtering material contained therein or to clean the perforated surfaces 31a.
  • the filtering unit 30 further comprises an upper plate 300 comprising a first 310 and a second 311 portion, in the shown embodiment, both having the shape of circular ring sector but having different diameter.
  • the first portion 310 is intended to close at the top the duct 305, since its inner circumference 300a is flush with the circumference of the upper surface 23 of the suction unit 20, while its outer circumference 300b is flush with the outermost array of the plurality of panels 31.
  • the outermost array of panels 31 is spaced from the perimetral wall 30a of the enclosure.
  • the intermediate chamber 40 is closed at the top by a panel 41 provided with a grid 42 and fastened to the hood body 10, such that air can flow outside the hood preventing particulate or dirt from depositing therein.
  • the filtering unit 30 is a unique removable block that acts also as a chamber containing the suction unit 20.
  • the filtering panels 31, when inserted in the hood 1, are arranged, at least for a portion, around the suction unit 20 and are interposed between the perimetral wall 30a of the filtering unit 30 and the suction unit 20.
  • the holes present on the whole surface 31a of the panels allow air to pass through a sequence of areas facing along the duct 305 run through by the air sucked by the suction unit 20.
  • Another aspect of the present invention relates to a method to purify an air flow by a filtering hood 1 as described herein before, comprising the following steps.
  • step b. (step 102) of the above method comprises the operation of directing the air expelled from the suction unit 20 through its lateral surface 220 towards a duct 305 of the curved portion, said duct comprising a first portion that comprises a side wall 301 and a second portion that comprises at least a perforated panel 31 to allow fluid to pass through; in this case it has to be noted that the air expelled from the suction unit through its lateral surface is neither conveyed into a connection duct for being transferred from the suction zone to the filtering zone of the hood, nor it is let free to flow that is directly towards the filtering elements, but it runs through the curved portion and is conveyed towards the filtering elements, also arranged in a curved manner around the lateral surface of the suction unit.
  • the filtering unit comprises a duct composed of a first portion defined by a perimetral wall and a second portion composed of a series of consecutive concentric panels between which filtering material is interposed
  • a further embodiment on the contrary can provide one or more arrays of panels, but arranged along all the perimetral wall of the duct run through by air, such to surround completely the suction unit.
  • the filtering material is housed in compartments surrounding in a discontinuous manner the suction unit and arranged along a perimetral edge of the filtering unit.
  • the filtering unit for example such as show in figs. 6,7 and 8 it is possible to provide the filtering unit to be composed of an upper surface 71 and a lower surface 72 where respective joining elements (71a,71b) are arranged along the perimeter, which allow the upper surface and the lower surface to be coupled and uncoupled.
  • the lower surface 72 further has an opening 73 allowing the suction unit 20 to be housed in the filtering unit.
  • the joining elements (71a,71b) are further spaced from each other, and in the coupled condition, define volumes 74 therebetween in fluid communication with the inner chamber 222.
  • filtering material 75 is inserted, such as for example blocks of activated charcoal baffles, such to surround the suction unit 20.
  • the filtering material acts on air expelled from the inner chamber 222 along the lateral surface 220 involved by the rotation of the impeller 22.
  • figure 11 shows the filtering unit of figure 10 without the upper plate 300 such to show the inside in details.
  • the filtering unit 30 is arranged along a substantially curved portion provided with concavity facing the lateral surface 220 of the suction unit 20.
  • the curved portion comprises a duct 305 to convey the fluid expelled through the lateral surface 220 of the suction unit 20 towards an outlet opening formed on the box body.
  • the duct 305 is substantially circular and is delimited, in a position distal from the impeller 22, by perforated panels 31 and solid panels 33.
  • the air pushed by the impeller 22 passes through the perforated panels 31 where it is filtered and then it passes through the upper openings 312 (delimited on one side by the upper plate 300 and on the other side by the perimetral walls 30a) and the perimetral openings 313 (obtained from the perimetral walls 30a) such to enter the chamber 40 and to flow out from an outlet (not shown in the figures) of the box body 10 of the hood.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Glass Compositions (AREA)
  • Seal Device For Vehicle (AREA)
EP16196357.4A 2015-11-02 2016-10-28 Hotte filtrante avec filtres orientés vers le ventilateur Active EP3163175B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITUB2015A004759A ITUB20154759A1 (it) 2015-11-02 2015-11-02 Cappa filtrante con filtri affacciati alla girante

Publications (2)

Publication Number Publication Date
EP3163175A1 true EP3163175A1 (fr) 2017-05-03
EP3163175B1 EP3163175B1 (fr) 2018-08-29

Family

ID=55409955

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16196357.4A Active EP3163175B1 (fr) 2015-11-02 2016-10-28 Hotte filtrante avec filtres orientés vers le ventilateur

Country Status (2)

Country Link
EP (1) EP3163175B1 (fr)
IT (1) ITUB20154759A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108506983A (zh) * 2018-04-25 2018-09-07 中山市风田集成厨卫电器有限公司 一种集烟柜及其制造方法
EP3401551A1 (fr) * 2017-05-11 2018-11-14 Vti Dispositif d'extraction d'air à basse pression
DE102019101589A1 (de) * 2019-01-23 2020-07-23 Miele & Cie. Kg Dunstabzugshaube und Verfahren zum Wechseln von Filtereinheiten

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3768237A (en) * 1970-01-30 1973-10-30 N Bergmark Filter arrangement in kitchen ventilating system
DE7508730U (de) * 1975-03-19 1975-08-28 Sueddeutsche Metallwerke Gmbh Filter und lueftungseinbauelement insbesondere zur verwendung in dunstabzugshauben
US4547208A (en) * 1983-04-27 1985-10-15 Research Industries, Inc. Fluid propelling and filtering apparatus with removable filter cartridge
EP0301640A1 (fr) * 1987-07-27 1989-02-01 ELICA S.p.A. Hotte aspirante de cuisine à grande surface de collection de fumées
EP2159493A2 (fr) * 2008-09-01 2010-03-03 BSH Bosch und Siemens Hausgeräte GmbH Dispositif d'évacuation des fumées
EP2498006A1 (fr) * 2011-03-10 2012-09-12 Miele & Cie. KG Hotte aspirante pour un four, une plaque de cuisson ou analogue

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3768237A (en) * 1970-01-30 1973-10-30 N Bergmark Filter arrangement in kitchen ventilating system
DE7508730U (de) * 1975-03-19 1975-08-28 Sueddeutsche Metallwerke Gmbh Filter und lueftungseinbauelement insbesondere zur verwendung in dunstabzugshauben
US4547208A (en) * 1983-04-27 1985-10-15 Research Industries, Inc. Fluid propelling and filtering apparatus with removable filter cartridge
EP0301640A1 (fr) * 1987-07-27 1989-02-01 ELICA S.p.A. Hotte aspirante de cuisine à grande surface de collection de fumées
EP2159493A2 (fr) * 2008-09-01 2010-03-03 BSH Bosch und Siemens Hausgeräte GmbH Dispositif d'évacuation des fumées
EP2498006A1 (fr) * 2011-03-10 2012-09-12 Miele & Cie. KG Hotte aspirante pour un four, une plaque de cuisson ou analogue

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3401551A1 (fr) * 2017-05-11 2018-11-14 Vti Dispositif d'extraction d'air à basse pression
FR3066234A1 (fr) * 2017-05-11 2018-11-16 Vti Dispositif d’extraction d’air a basse pression.
CN108506983A (zh) * 2018-04-25 2018-09-07 中山市风田集成厨卫电器有限公司 一种集烟柜及其制造方法
DE102019101589A1 (de) * 2019-01-23 2020-07-23 Miele & Cie. Kg Dunstabzugshaube und Verfahren zum Wechseln von Filtereinheiten
EP3686496A1 (fr) 2019-01-23 2020-07-29 Miele & Cie. KG Hotte aspirante et procédé de remplacement des unités de filtre
DE102019101589B4 (de) * 2019-01-23 2021-02-11 Miele & Cie. Kg Dunstabzugshaube und Verfahren zum Wechseln von Filtereinheiten

Also Published As

Publication number Publication date
ITUB20154759A1 (it) 2017-05-02
EP3163175B1 (fr) 2018-08-29

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