EP3453976B1 - Air extraction device - Google Patents

Air extraction device Download PDF

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Publication number
EP3453976B1
EP3453976B1 EP18192389.7A EP18192389A EP3453976B1 EP 3453976 B1 EP3453976 B1 EP 3453976B1 EP 18192389 A EP18192389 A EP 18192389A EP 3453976 B1 EP3453976 B1 EP 3453976B1
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EP
European Patent Office
Prior art keywords
air extraction
extraction device
air
draw
extraction duct
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
EP18192389.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3453976A1 (en
Inventor
Joren DE TEMMERMAN
Johan ALLEMEERSCH
Michaël DECORTE
Randy FEYS
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.)
Novy Nv
Original Assignee
Novy Nv
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Filing date
Publication date
Application filed by Novy Nv filed Critical Novy Nv
Publication of EP3453976A1 publication Critical patent/EP3453976A1/en
Application granted granted Critical
Publication of EP3453976B1 publication Critical patent/EP3453976B1/en
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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
    • F24C15/2042—Devices for removing cooking fumes structurally associated with a cooking range e.g. downdraft
    • 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
    • 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
    • F24C15/2078—Removing cooking fumes movable
    • F24C15/2092—Removing cooking fumes movable extendable or pivotable

Definitions

  • This invention relates to an air extraction device comprising at least an upright air extraction duct, through which the air is drawn off according to an upright draw-off direction, comprising one or more filter elements, which are arranged in the air extraction duct, for the retention of grease and water present in the drawn-off air, and comprising at least one or more reservoirs for the collection of the grease and water emanating from these one or more filter elements, wherein these one or more reservoirs are substantially arranged at the bottom of the one or more filter elements, viewed according to the draw-off direction when the air extraction device is in use, wherein the air extraction device is a worktop extractor hood and the air is drawn off from top to bottom in the air extraction device.
  • An extractor hood can also be denoted by the term draught hood or vapour hood. Different types of extractor hoods exist. This invention specifically relates to a worktop extractor hood.
  • the air is either drawn off upwards through the air extraction duct or drawn off downwards through the air extraction duct.
  • the air is drawn off downwards.
  • the filter elements are capable of capturing most of the grease and water which is present in the drawn-off air.
  • the filter elements are generally produced such that at least a part of this retained grease and water is also held fast by these filter elements.
  • By then replacing and/or cleaning the filter elements at regular intervals, for example by washing them down by hand or cleaning them with the aid of a dishwasher it is ensured that the air is always drawn off effectively and the grease and water is retained by the filter elements.
  • a part of the grease and water retained by the one or more filter elements will flow out of the filter elements, however, inter alia as a result of gravity.
  • the air extraction device is provided with one or more reservoirs, in which this grease and water can be captured and stored.
  • EP 2 554 917 A1 discloses an air extraction device according to the preamble of claim 1.
  • the one or more filter elements extract the grease and the water from the drawn-off air.
  • the grease and water is thus retained at the site of these one or more filter elements.
  • a part of this grease and water remains stuck in these one or more filter elements, however a part will flow out of these one or more filter elements, and this, for example, under the influence of gravity.
  • the grease and water which flows out of these one or more filter elements and thus does not get stuck in the one or more filter elements is here discharged at the site of the one or more discharge openings.
  • the one or more reservoirs here stand each arranged under a said discharge opening and thus capture the grease and water at the site of the discharge opening. By working with discharge openings, the stream of grease and water is centralized at one or more places in the air extraction duct.
  • a discharge opening can have a small dimension
  • the dimensions of the reservoir viewed according to planes perpendicular to the draw-off direction
  • these reservoirs can be designed such that the dimensions of the passageway of the air extraction duct, viewed according to planes perpendicular to the draw-off direction, decrease only slightly as a result of the reservoirs, so that the airflow efficiency is limited only a little by the reservoirs, and thus by the elements which are provided to store captured water and grease.
  • per filter element there is only provided one, or at most two, discharge opening(s), this in order to reduce the airflow efficiency as little as possible.
  • One discharge opening can also be provided for a plurality of filter elements.
  • the one or more filter elements divide the air extraction duct almost completely into an uppermost portion, which extends above these one or more filter elements, and a lowermost portion, which extends under these one or more filter elements, so that almost all the grease and water is retained by the one or more filter elements. In this way, it is ensured that the grease and water present in the drawn-off air is filtered effectively out of the air.
  • the air extraction duct is also preferably arranged practically vertically, and hence the draw-off direction extends practically vertically.
  • the air extraction device is a worktop extractor hood and the air is drawn off from top to bottom in the air extraction duct.
  • a said collecting element is connected to a said filter element, and this collecting element and this filter element together form a filter.
  • This filter element and this collecting element here form a whole which can be regarded as a separate entity and can be denoted by the term filter.
  • the filter thus comprises at least one discharge opening, and preferably only one discharge opening.
  • This filter can be arranged, for example, removably in the air extraction duct, so that this filter can be cleaned and/or replaced at appropriate intervals.
  • the collecting element comprises a profile, in which the bottom side of the filter element is arranged, wherein this profile comprises the said discharge opening.
  • the collecting element is the profile.
  • the bottom side of a filter element such as the bottom side of a plate-like filter element, can be easily arranged in a profile, such as a gutter-shaped profile. Since the bottom side of the filter element is arranged in the profile, grease and water is conducted effectively in the profile by gravity.
  • the bottom side of the filter element is here then the bottom side of the filter element during use of the air extraction device.
  • the discharge opening is here then preferably an opening through the profile.
  • the filter element has the shape of a rectangular plate
  • the filter element is preferably arranged such that the bottom side extends practically perpendicular to the draw-off direction, and thus practically horizontally, when the draw-off direction is arranged practically vertically.
  • the profile is here then a profile which extends practically horizontally.
  • a said filter element is a plate-like filter element, which extends substantially according to a plane which makes an angle of between 10° and 90°, preferably between 20° and 60°, with the draw-off direction. Yet more preferably, this filter element has a rectangular shape. Through the placement of this filter element, a part of the filter element will be higher than another part of the filter element, whereby grease and water will make its way to the lowermost portions or lowermost portion of the filter element as a result of gravity. The collecting element is then preferably also arranged at the site of this lowermost portion or these lowermost portions. With the aid of gravity, the grease and water is then conducted to the discharge opening.
  • These filter elements preferably exist of a plurality of small metal plates which lie one against another, wherein these plates are made of stainless expanded metal.
  • the collecting element forms part of a frame which encases the margins of the filter element, viewed according to the plane in which the filter element extends, and which comprises the said profile.
  • the filter element is then completely surrounded by a frame, whereby the filter element is easily placeable in the air extraction duct and is also guarded by the frame.
  • the air extraction device comprises one or more holders, which are arranged in the air extraction duct, for the positioning of the one or more filters in the air extraction duct.
  • the filters then rest on the holders.
  • these one or more holders are designed as protection against objects falling through the air extraction duct. They then not only hold the filters at the desired place, but they also form an obstacle for objects, whereby objects cannot make their way past these holders. These holders then preferably divide the air extraction duct almost completely into two parts, so that objects cannot make their way from one part to the other part. This is above all of importance for a worktop extractor hood. Here, the air is drawn off downwards into the air extraction duct and it is of importance that objects, such as cutlery, cooking utensils, etc., cannot make their way through the whole of the air extraction duct. These holders are then, for example, made of a perforated material, whereby these can support the filters and objects used in the kitchen, but air can still easily make its way through the holders.
  • the air extraction device comprises positioning elements, which are arranged in the air extraction duct, for the positioning of the reservoirs.
  • the reservoirs are removable and also the filters are removable, so that these filters and reservoirs can easily get cleaned, if desired, and this while the holders, and thus the fall-through protection if the holders serve also as fall-through protection, can remain in the air extraction duct during the cleaning of the filters and/or the reservoirs, so that objects cannot make their way past these holders.
  • each holder comprises a said reservoir.
  • the holders of the filters do not serve as fall-through protection, but separate elements are provided, which latter serve as fall-through protection.
  • the one or more collecting elements and the one or more reservoirs ensure a surface area decrease of no more than 30% of the passageway of the air extraction duct .
  • This surface area decrease is preferably at most 20% and, yet more preferably, at most 10%.
  • the air extraction efficiency is here as optimal as possible at the site of the reservoirs.
  • the one or more reservoirs are preferably arranged at least partially in the air extraction duct.
  • the air extraction device can in this way be realized in compact construction. It is here also easy to make certain parts extensible. For a worktop extractor hood, this can be useful, because it can then be ensured that the extractor hood is little visible when the extractor hood is not in use. Yet more preferably, the reservoirs are arranged fully in the air extraction duct.
  • the air extraction device is a worktop extractor hood and the air is drawn off from top to bottom into the air extraction duct.
  • the air is here then drawn off downwards in the air extraction duct.
  • this air extraction duct is arranged practically vertically.
  • at least a part of the air extraction duct is then preferably located above the hotplate, viewed according to the vertical direction, so that this at least one part of the air extraction duct is located next to the pots and pans which are on the hotplate. In this way, the air extraction duct is located close to the air which is to be drawn off.
  • a said reservoir is elongate and extends practically according to the draw-off direction.
  • the reservoir can still capture a sufficient volume of grease and water, and this without a strong decrease in air extraction efficiency.
  • the reservoirs can together, for example, still have a volume which is greater than 50 ml, or even greater than 90 ml. It is hence not necessary to frequently empty these reservoirs, which ensures a high ease of use of the air extraction device.
  • the air extraction device comprises at least two said filter elements, which are arranged in the air extraction duct.
  • the dimensions of each filter element, or of the filter per se if the filter element is connected to its collecting element, are hereby limited, so that the filter element or the filter can be easily cleaned. This by manual washing down in a pump tank or by washing down with a dishwasher. As a result of these more limited dimensions, the filter elements can be easily placed in a dishwasher.
  • moving elements can be designed to effect the movement of this moving part.
  • the filter elements can be provided, for example, on both sides of these moving elements. Further preferably, these filter elements are arranged next to one another and they extend in the same plane.
  • the height direction of the air extraction duct preferably corresponds to the draw-off direction.
  • the air extraction duct then further has a width direction and a length direction, wherein preferably the dimension of the air extraction duct according to the length direction is greater than the dimension according to the width direction.
  • This said plane then preferably extends according to this length direction and makes an angle with the width direction and the height direction.
  • the filter elements then preferably extend practically fully over the entire width and length of the air extraction duct, so that they neatly divide the air extraction duct and grease and water is retained by these filter elements.
  • the air extraction duct extends according to a height direction which corresponds to the draw-off direction
  • the air extraction device comprises two filter elements and only one discharge opening for each filter element, wherein these discharge openings are arranged on both sides of the air extraction duct, viewed according to a direction perpendicular to the height direction of the air extraction duct.
  • the discharge openings, and thus the reservoirs located under these discharge openings thus extend on both sides of the air extraction duct, whereby these have little adverse effect on the air extraction efficiency.
  • the air extraction duct here has, apart from height direction, also a width direction and a length direction, wherein this width direction and length direction both extend perpendicular to the height direction.
  • the dimensions of the air extraction duct, viewed according to the length direction, can be greater, for example, than the dimension of the air extraction duct, viewed according to the width direction.
  • the length direction of the air extraction duct then preferably extends in the said plane in which the one or more filter elements extend.
  • the one or more filter elements and/or the one or more reservoirs are arranged removably in the air extraction duct.
  • the filter elements can easily get cleaned and/or replaced, and/or the reservoirs can easily get emptied.
  • one or more collecting trays are preferably arranged. Should grease and water make its way past the filter elements and not be captured by the reservoirs and/or should the reservoirs overflow, these collecting trays ensure that this grease and water does not remain in the drawn-off air. This is of importance if the air extraction device brings the filtered air back into the room from which the air was originally drawn off. In extractor hoods having a recirculation system, this is the case.
  • the air extraction duct comprises an upwardly and downwardly extensible moving part, wherein this moving part is delimited by two mutually opposing side profiles, which are distanced apart and are arranged so as to be upwardly and downwardly movable according to the draw-off direction, a front wall and a rear wall, which extend parallel to one another and mutually connect both the side profiles, a top profile, which extends atop the side profiles according to a direction perpendicular to the draw-off direction and mutually connects both the side profiles, and wherein an opening is present between the front wall and the top profile, wherein this opening is an intake opening for drawing air into the air extraction duct.
  • the dimensions of the front wall, viewed according to the draw-off direction are here smaller than the corresponding dimensions of the rear wall.
  • This moving part can preferably also be placed at several positions (heights), depending on the pots and pans which are used.
  • the top profile is removable.
  • the air extraction duct can be easily cleaned, and/or the removable components, such as the filter elements and/or the reservoirs, can be easily taken out of the air extraction duct.
  • the front wall is preferably removable, so that the filter elements can be accessed still more easily.
  • the top profile comprises a guide element in order to guide the air from the draw-off opening into the air extraction duct, and this guide element comprises a gutter, which extends perpendicular to the draw-off direction for the capture of grease and water.
  • this guide element comprises a gutter, which extends perpendicular to the draw-off direction for the capture of grease and water.
  • the front wall and the rear wall are at least partially made of a transparent material. It is thereby possible to look through the front wall and the rear wall, so that the appearance of worktop extractor hoods of this type is seen as aesthetic.
  • the air extraction device comprises at least one fan and a motor for driving this fan, wherein this air extraction device is realized in compact construction, and this motor and at least one fan are located under the air extraction duct, and their dimensions, viewed according to horizontal directions, extend past this air extraction duct.
  • one embodiment is represented of a worktop extractor hood according to the invention.
  • other embodiments are also possible.
  • the worktop extractor hood is designed to be incorporated in a kitchen cabinet (18) at the site of a hotplate (15).
  • the worktop extractor hood comprises a moving part, so that this worktop extractor hood can assume at least two positions with respect to the hotplate (15).
  • this moving part extends through the hotplate (15) such that a part thereof is higher than the hotplate (15) (see Figures 1 , 3 and 9 ). In this way, air can proceed to be drawn off at the site of the top side of the pots and pans which are placed on the hotplate (15) and/or at a height which is above the pots and pans.
  • the top side of the moving part extends in the plane of the hotplate (15), so that the visibility of the worktop extractor hood is minimal and the worktop extractor hood forms one aesthetic whole with the hotplate (15) (see Figure 12 ).
  • this worktop extractor hood is designed to draw off the air downwards.
  • this worktop extractor hood comprises a vertically directed air extraction duct (1), wherein the moving part comprises a part of this air extraction duct (1).
  • the air is drawn off downwards through a vertical draw-off direction (A).
  • this air extraction duct (1) are arranged the following elements: two filters (5), two holders (6) for the filters (5), two reservoirs (3), which are arranged at the bottom of the filters (5) (see Figures 7 and 8 ), a moving column (16) comprising moving elements to move the moving part upwards and downwards.
  • Each filter (5) consists of a plate-like filter element (2) consisting of a plurality of plates of expanded metal, wherein this filter element (2) extends according to a plane and wherein the filter (5) comprises a frame which encases the margins of the filter element (2), viewed according to the said plane.
  • the filters (5) are right-angled in shape.
  • the filter elements (2) are capable of retaining grease and water from the drawn-off air.
  • the worktop extractor hood is positioned in such a way in the kitchen cabinet (18) and with respect to the hotplate (15) that the moving part moves upwards and downwards according to the vertical direction (A).
  • This direction (A) is also refer to this direction (A) as the height direction (A) of the air extraction duct (1).
  • the hotplate (15) is designed to be arranged horizontally and has normally a defined length direction (B) and depth direction (C).
  • This length direction (B) corresponds to the length direction of the air extraction duct (1)
  • the depth direction (C) corresponds to the width direction of the air extraction duct (1).
  • the dimension of the air extraction duct (1) according to the length direction is somewhat smaller than the corresponding dimension of the hotplate (15), so that the air extraction duct (1) can extend through an opening of the hotplate (15), but can nevertheless still draw off air over a sufficient length.
  • the moving column (16) is arranged centrally in the air extraction duct (1), viewed according to the length direction of the air extraction duct (1).
  • the two filters (5) are arranged on both sides of the moving column (16) and are arranged such that they both extend in the same plane and this plane makes an angle with the height direction (A) and the width direction of the air extraction duct (1), and that the length direction of the air extraction duct (1) extends in this plane.
  • each filter (5) extends over the entire width of the air extraction duct (1) and both filters (5) together extend over almost the entire length of the air extraction duct (1), except for at the site of the moving column (16).
  • the length direction of the filters (5) corresponds to the length direction of the air extraction duct (1), and the bottom sides of the filters (5), when these are placed in the air extraction duct (1), rest on the holders (6) arranged under these filters (5).
  • the air extraction duct (1) is divided practically fully in two in a portion which extends above the filters (5) and a portion which extends under the filters (5). This means that almost all drawn-off air will make its way through the filter elements (2), whereby grease and water is filtered effectively out of the drawn-off air.
  • each filter (5) when this is placed in the air extraction duct (1), i.e. the lowermost profile (4) of the frame, serves as a collecting element (4) of grease and water.
  • the fact is that not all the water and grease which is retained by the filter elements (2) remains stuck in these filter elements (2). As a result of gravity, a part of the grease and water will also make its way downwards along the filter elements (2) and thus end up in the lowermost profile (4) of the frame. In order to ensure proper functioning of the worktop extractor hood and to avoid unnecessary dirtying of the air extraction duct (1), this grease and water must be captured.
  • each lowermost profile (4) comprises a discharge opening located at the site of a side edge of the air extraction duct (1).
  • each discharge opening is arranged an elongate reservoir (3), which extends according to the height direction (A) of the air extraction duct (1), thus according to the draw-off direction (A).
  • the dimensions of each reservoir (3) perpendicular to this draw-off direction (A) are limited, but are sufficient to capture the grease and water coming out of the discharge opening. In other words, the grease and the water which does not remain stuck in the filter elements (2) ends up in the reservoirs (3).
  • the moving part comprises two side profiles (8), which are distanced apart according to the length direction and which are movable upwards and downwards, a rectangular rear wall (10), which extends according to the length direction and height direction (A) and which mutually connects the two side profiles (8), a rectangular front wall (9), which extends according to the length direction and height direction (A) and which mutually connects the two side profiles (8) and rests on a holding element (19) at the site of the bottom side of the moving part, and wherein the dimension of the front wall (9), viewed according to the height direction (A), is smaller than the corresponding dimension of the rear wall (10).
  • the moving part comprises a removable top profile (11), which mutually connects the two side profiles (8) and rests on the rear wall (10).
  • the top profile (11) comprises a guide element (13).
  • This guide element (13) comprises at the bottom a gutter (14), which extends practically horizontally during use of the worktop extractor hood and serves to capture already a first quantity of grease and water.
  • the holders (6) are perforated and extend practically according to the full width direction and the length direction, so that these prevent objects from being able to find their way into the air extraction duct (1) when the filters (5) are removed for cleaning or replacement.
  • the holders (6) here additionally form a fall-through protection.
  • the holders (6) can possibly also be removable. If this is the case, these holders (6) preferably rest on rods which are placed sufficiently close together that a filter (5) cannot fall therebetween if one wishes to put the filters (5) back and one has forgotten to first install the holders (6).
  • the worktop extractor hood comprises at the bottom a further two additional collecting trays (7) in order to capture excess grease and water.
  • front wall (9) and that part (17) of the rear wall (10) which is designed to extend at the same height as the front wall (9) are made of a transparent material.

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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)
  • Filtering Of Dispersed Particles In Gases (AREA)
EP18192389.7A 2017-09-06 2018-09-04 Air extraction device Active EP3453976B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE2017/5632A BE1025527B1 (nl) 2017-09-06 2017-09-06 Luchtafvoerinrichting

Publications (2)

Publication Number Publication Date
EP3453976A1 EP3453976A1 (en) 2019-03-13
EP3453976B1 true EP3453976B1 (en) 2020-06-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP18192389.7A Active EP3453976B1 (en) 2017-09-06 2018-09-04 Air extraction device

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EP (1) EP3453976B1 (nl)
BE (1) BE1025527B1 (nl)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019212492A1 (de) * 2019-08-21 2021-02-25 BSH Hausgeräte GmbH Tischlüftung
BE1029058B1 (de) * 2021-01-27 2022-08-29 Miele & Cie Wrasenschirmeinrichtung, Downdraftlüfter und Verfahren zur Wartung
BE1029053B1 (de) * 2021-01-27 2022-08-29 Miele & Cie Downdraftlüftermodul und Kochsystem

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202016104283U1 (de) * 2015-08-07 2016-08-09 Airforce S.P.A. Vorrichtung zum Filtern von Dünsten und Dämpfen vom Kochen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA774192B (en) * 1976-09-01 1978-05-30 Doane Mfg Co Grease filter for kitchen ventilating systems
DE102011080399A1 (de) * 2011-08-04 2013-02-07 BSH Bosch und Siemens Hausgeräte GmbH Vorrichtung zur Absaugung von Luft bei einem Kochfeld
KR101486725B1 (ko) * 2014-09-29 2015-01-29 주식회사 홈쿠벤 급배기 겸용 인덕션 환기시스템

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202016104283U1 (de) * 2015-08-07 2016-08-09 Airforce S.P.A. Vorrichtung zum Filtern von Dünsten und Dämpfen vom Kochen

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Publication number Publication date
EP3453976A1 (en) 2019-03-13
BE1025527A1 (nl) 2019-03-29
BE1025527B1 (nl) 2019-04-05

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