EP0466687B1 - Sauganordnung - Google Patents

Sauganordnung Download PDF

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Publication number
EP0466687B1
EP0466687B1 EP89905812A EP89905812A EP0466687B1 EP 0466687 B1 EP0466687 B1 EP 0466687B1 EP 89905812 A EP89905812 A EP 89905812A EP 89905812 A EP89905812 A EP 89905812A EP 0466687 B1 EP0466687 B1 EP 0466687B1
Authority
EP
European Patent Office
Prior art keywords
casing
air
suction opening
side wall
suction
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.)
Expired - Lifetime
Application number
EP89905812A
Other languages
English (en)
French (fr)
Other versions
EP0466687A1 (de
Inventor
Tonny ÄSTRÖM
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.)
ASTROEM, BENGT-OLOV
Original Assignee
Astrom Bengt-Olov
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 Astrom Bengt-Olov filed Critical Astrom Bengt-Olov
Priority to AT89905812T priority Critical patent/ATE108099T1/de
Publication of EP0466687A1 publication Critical patent/EP0466687A1/de
Application granted granted Critical
Publication of EP0466687B1 publication Critical patent/EP0466687B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area

Definitions

  • the present invention relates to a device in casings for sucking air containing impurities away from a region, such as a working place, for example at a kitchen grate, under or near the casing, said device comprising a casing downwardly open, at least a suction opening connected to a suction member for generating an air flow from below, into the casing and out through the suction opening for conducting air away from the device, means for conducting a part of the air sucked from the interior of the casing back to the region of a lower edge of a side wall of the casing and members for directing this air as a stream from said edge towards the interior of the casing, so that secondary air flows into the casing are induced at its edge region.
  • the object of devices of this kind is to remove as great a part of the impurities as possible in sucking such a small total air quantity as possible away from the region under the device.
  • it is desired to suck air containing impurities away from the region beside the casing and in the edge regions of the casing without utilizing any enormous suction powers, which give rise to disagreeable draught, noise or removing of a great amount of clean and heated air, which would be very expensive.
  • the cold air in said air stream may give rise to so called cold fall phenomena inside the casing, and the total amount of air which has to be sucked away gets larger than if it were possible to recirculate a part of the air sucked and use this to form the air stream for the ejector effect.
  • Devices being successful in this respect are known through US patent 4 050 367 and GB-A-2 169 697. The efficiency of these known devices is good, but could be further improved.
  • the object of the present invention is to improve a device of the type mentioned in the introduction, so that the quotient amount of impurities divided by the total amount of air sucked away will be even higher than in the devices of the kind already known.
  • the device according to the invention shown in the figures will here be called kitchen grate casing, which is not to be understood as limitative.
  • the parts common to the different embodiments have been provided with the same reference numerals.
  • the kitchen grate casing shown in Fig 1 comprises a substantially box-shaped casing 1 downwardly open.
  • the kitchen grate casing has mirror image symmetry with a vertical mirror image symmetry plane extending in the longitudinal direction of the casing 1, i.e. perpendicularly to the drawing plane.
  • a V-shaped filter house 2 projects downwardly from the upper limitation of the casing and towards the casing opening 3 in the middle of the casing.
  • the filter house 2 is elongate and extends parallel to the side walls 4 of the casing over substantially the entire length of the casing.
  • the filter house 2 is provided with first suction openings 6 covered by filters 5 absorbing smell and other impurities.
  • the filters 5 are disc-like and constituted by conventional filter elements adapted for the particular task.
  • the filter house is terminated by an evacuating opening 8 covered by a filter 7 to an exhaust air conduit 9 connected to a suction member, for example the main fan of the main ventilation system of the premises or the building in question.
  • a second suction opening 10 is arranged in the upper limitation wall of the casing on each side of the V-shaped filter house 2. This suction opening is also covered by a filter 11 of the type similar to the type of the filters 5 and 7 and it is directed substantially vertically downwardly towards the opening of the casing.
  • the second suction opening 10 is connected to a second suction member in the form of a fan 12 through an intake 13.
  • the outlet 14 of the fan emerges into a distributing chamber 15 extending over substantially the entire length of the side wall 4.
  • the distribution chamber has three elongate limitation walls, two of which are the side wall 4 of the casing and the upper limitation wall thereof and these are interconnected by means of an inclined wall 16.
  • the inclined wall 16 is provided with a succession of openings 17 extending over substantially the whole length of the wall, a section according to Fig 1 being carried out through such an opening.
  • a directing plate 18 is arranged on the inclined wall 16 outside the distribution chamber so as to divert and direct air coming out of the openings 17, so that it gives rise to air flows substantially being a tangent to the outside of the inclined wall 16.
  • a negative pressure will be created in the filter house 2 by the suction member connected to the exhaust air conduit 9 and a primary air flow from below and into the casing towards the first suction openings 6 will be produced.
  • This air flow is indicated by several arrows 19.
  • a part of the air flowing towards the suction opening 9 will divert towards the second suction opening 10 (see arrow 20).
  • the main part of this air passes through the filter 11, in which the greatest part of its impurities is caught, whereupon this air is recirculated to the casing through the distribution chamber 15.
  • the width of the distribution chamber the comparatively concentrated air flow emanating from the fan 12 will be distributed substantially uniformly over the entire length of the chamber and flowing out of the openings 17 in the direction indicated by the arrow 21.
  • an air stream with the same width as the length of the side wall 4 is formed, but it has a comparatively small dimension in the direction perpendicular thereto.
  • an air stream along the side wall 4 downwards towards the lower edge of the casing is created.
  • a directing plate 23 extending over substantially the entirety of this edge is so arranged that it diverts said air stream substantially in the direction towards the first suction opening 6 (arrows 24).
  • the air stream from the lower edge 22 of the side wall 4 in the direction upwardly/inwardly towards the interior of the casing obtained through this arrangement will induce secondary air flows from the outside of the casing in the edge regions thereof and into the casing towards a first suction opening 6.
  • the fact that an air stream draws surrounding air into secondary air flows is usually called the ejector effect.
  • the arrows 25 indicates air flows into the casing produced by said ejector effect. Thanks to this it will be possible to suck air containing impurities and located in these regions into the casing without the necessity of creating a disproportionately low negative pressure in the filter house 2, with removing of enormous amounts of clean air.
  • Another advantage of this kitchen grate casing consists in that a part of the air diverted towards the suction opening 10 through the ejector effect of the air flowing out of the openings 17 will be additionally diverted (arrow 26) and drawn into and follow the air stream downwardly towards the edge 22. In this way additional air quantities will be joining the air stream (for example arrow 27) and a rotating air movement will be produced in the room of the casing between the edge 22, the opening 10 and the walls 16 and 4.
  • These rotating air flows or streams are very advantageous, since they retain particles contained in the air inside the casing and also raise the air flows inside the casing in an effective way. Furthermore, they prevent effectively parts of the air stream flowing downwardly towards the edge 22 from disappearing out through the opening 3 of the casing.
  • FIG. 2 A second advantageous embodiment of the device according to the invention is shown in Fig 2.
  • the parts 10-18 of the kitchen grate casing according to Fig 1 have been replaced by an insert 28 manufactured in advance, which is shown more in detail in Fig 3.
  • the insert is designed to be introduced into kitchen grate casings already existing and be retained by means of suitable retaining members, in order to be easily removed when this is desired, for example for cleaning purposes.
  • Such an insert may be arranged in either the position according to Fig 2 or the one according to Fig 4.
  • the insert has a second suction opening 10 covered by a flat filter 11. This suction opening is connected to a fan 12, which blows out air sucked in through the opening 9 into a distribution chamber 29.
  • the distribution chamber 29 is divided into two halves by a finely perforated plate 30, through which the air from the fan 12 has to pass in order to reach the openings 31 in one end of the chamber towards the interior of the casing.
  • the perforated plate 30 contributes additionally to a uniform distribution of the air stream reaching the openings 31 over all of the openings. It appears from Fig 3 what the openings look like and how they are arranged, said filter 11 being omitted in this figure.
  • an elongate directing plate 32 is so arranged in the proximity of the openings 31, that the air stream coming out of the insert is directed downwardly along the side wall of the casing and an air stream as well as rotating air movements similar to the ones in the device according to Fig 1 are created.
  • the directing plate 32 is advantageously adjustable for adjustment of the direction of the air stream.
  • a further advantage of the rotating air flows and the air stream moving along the side wall 4 consists in the fact that, if the side wall is made of a material with a high thermal conductivity, a great part of the heat content of the air may be led away to the room outside the casing, so that the air carried away through the exhaust air conduit 9 has a slightly lower temperature than the rest of the air of the room.
  • FIG 4 It is shown in Fig 4 how an insert according to Fig 3 manufactured in advance has been arranged in a kitchen grate casing with the suction opening 10 substantially horizontally directed and the openings 31 located in the vicinity of the lower edge 22 of the side wall 4.
  • This insert is provided with a directing plate 32' according to Fig 3, which is adjustable (the screw 33) and so directed that it together with a directing member 34 replacing the directing plate 23 directs the air stream from the openings upwardly/inwardly substantially towards the first suction opening 6.
  • the insert 28 in Fig 4 is preferably kept in place by resting on a lower edge portion 35 of the casing and upper guiding members not shown projects downwardly from the top of the casing and retain the insert in lateral direction, so that the latter after removing a short wall of the casing may be pushed into the same along the side wall 4 or through the opening 3.
  • the air flows inside the casing are directed more upwardly thanks to the high location of the second suction opening 10.
  • the embodiments described above relate to casings intended to be located in a room with both side walls 4 out in the room, but in the case that the casing is to be placed close to or against a wall the device only consists of a half of the devices shown. It will then be cut off in the mirror image symmetry plane, where a wall for application on the room wall in question is arranged. Preferably, this wall will then limit the filter house from which the exhaust air conduit emanates.
  • the first suction member may be constituted by the main fan of the ventilation system of the building, but a separate fan may just as well be arranged for this task.
  • second suction openings may be arranged one after the other along the extension of the casing and through separate fans lead air to a common distribution chamber.
  • the openings 17 and 31, respectively, could be one single continuous elongated slit, even though a plurality of holes would be advisable from the stability point of view.
  • the filters being a part of the device are of course adapted to their purposes, so they could for example have surfaces acting as catalyzers in a reaction in which a toxic compound of the air is converted to a harmless compound.
  • the casing 1 could also be circular, so that the opening 3 will be circular, but all other shapes of the casing desired are of course possible.

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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)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Exhaust Gas After Treatment (AREA)

Claims (10)

  1. Vorrichtung innerhalb einer Absaughaube (1) zum Absaugen von Verunreinigungen enthaltende Luft unter der Absaughaube und in ihrer Nähe aus einem Bereich, beispielsweise einem Arbeitsplatz über zum Beispiel einem Küchenherd, wobei die genannte Vorrichtung ein nach unten hin offenes Gehäuse aufweist, zumindest eine innerhalb der Absaughaube angeordnete Ansaugöffnung (6) hat, welche mit einer Saugeinrichtung zum Erzeugen eines Luftstroms von unten in das Gehäuse und nach außerhalb durch die Ansaugöffnungen zum Wegleiten von Luft aus der Vorrichtung verbunden ist, Mittel (10 -18, 28) zum Leiten eines Teils der in das Innere des Gehäuses gesaugten Luft zurück in den Bereich der unteren Kante einer Seitenwand des Gehäuses hat und Mittel (23, 32', 34) zum Leiten dieser Luft als eine Strömung von der genannten Kante in das Innere des Gehäuses aufweist, so daß Sekundärluftströme in das Gehäuse in den Bereichen seiner Kanten hervorgerufen werden, dadurch gekennzeichnet, daß die genannten Mittel (10 - 18, 28) zumindest eine, getrennt von der ersten Ansaugöffnung (6) angeordnete zweite Ansaugöffnung (10) aufweist, um die Luft für die genannte Strömung anzusaugen, daß alle durch die erste Ansaugöffnung angesaugte Luft aus der Vorrichtung abgeführt wird, daß die zweite Ansaugöffnung (10) näher als die erste Ansaugöffnung (6) zur Seitenwand (4) des Gehäuses angeordnet ist, welches nach unten hin durch die genannten Kanten begrenzt wird, und daß die zweite Ansaugöffnung (10) innerhalb des Gehäuses in einer wesentlichen Höhe, zumindest innerhalb der oberen Hälfte des Gehäuses, angeordnet ist.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß eine zweite Saugeinrichtung (12) mit der zweiten Ansaugöffnung (10) verbunden ist und daß die Druckseite dieser Saugeinrichtung mit einer Einrichtung (13 - 15, 29) Verbindung hat, welche in das Gehäuse eintaucht und die Luft in unmittelbarer Nähe der genannten Seitenwand (4) des Gehäuses leitet, von dessen unteren Kante (22) aus die genannte Luftströmung abströmt.
  3. Vorrichtung nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, daß ein Bauteil (2), welches sich im wesentlichen parallel zur Längsrichtung der Seitenwand (4) erstreckt, von der oberen Begrenzung des Gehäuses in einem Abstand von der genannten Seitenwand nach unten ragt, daß dieses Bauteil eine zur senkrechten Linie geneigte Fläche hat, deren Flächenmittennormale in etwa zur unteren Kante (22) der Seitenwand gerichtet ist, und daß die erste Ansaugöffnung (6) sich auf der genannten Fläche über im wesentlichen die gesamte Länge des Bauteils erstreckt.
  4. Vorrichtung nach Anspruch 2 oder den Ansprüchen 2 und 3, dadurch gekennzeichnet, daß eine Kammer (15, 29) sich entlang der Längsseite der genannten Wand, also in horizontaler Richtung, innerhalb des Gehäuses zwischen der zweiten Saugeinrichtung (12) und dem Auslaß der Leiteinrichtung erstreckt, so daß die Luft von der Saugeinrichtung (12) im wesentlichen gleichförmig aus einer Öffnung (17, 31) oder mehreren in das Innere des Gehäuses verteilt wird, wobei die Öffnungen sich zusammen über die ganze Kammer erstrecken, und daß die genannte Leiteinrichtung Leiteinrichtungen (23, 32', 34) aufweist, welche sich entlang der genannten unteren Kante der Seitenwand erstrecken und so gestaltet sind, daß sie die von der Kammer kommende Luft schräg nach oben und innen in das Gehäuse leiten, vorzugsweise in Richtung der ersten Ansaugöffnung (6), so daß ein Luftstrom entsteht, der im wesentlichen entlang der genannten Kante (22) der Seitenwand gleichmäßig verteilt ist.
  5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Kammer (15, 29) in der oberen Hälfte des Gehäuses angeordnet ist und daß die Öffnungen (17, 31) so ausgerichtet sind, daß sie einen Luftstrom erzeugen, der im wesentlichen kontinuierlich in horizontaler Richtung entlang der Seitenwand (4) verläuft, wobei der genannte Luftstrom vom oberen Bereich der Wand nach unten entlang der Wand zur genannten unteren Kante (22) geleitet wird.
  6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Öffnungen (17) mit Abstand von der Seitenwand (4) angeordnet sind und nach unten und abwärts zur Wand hin gerichtet sind.
  7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die zweite Ansaugöffnung (10) an der oberen Begrenzung des Gehäuses angeordnet und im wesentlichen vertikal abwärts im Gehäuse ausgerichtet ist.
  8. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die zweite Ansaugöffnung (10) im wesentlichen horizontal und im wesentlichen rechtwinklig zur Längsrichtung der genannten Seitenwand ausgerichtet ist, daß die Kammer (29) sich in vertikaler Richtung abwärts bis in die Nähe der unteren Kante der Seitenwand erstreckt und daß die Öffnungen (39) nahe der unteren Kante angeordnet und nach innen und oben in das Innere des Gehäuses hinein, vorzugsweise zur ersten Ansaugöffnung hin, ausgerichtet sind.
  9. Vorrichtung nach Anspruch 4 und gegebenenfalls einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, daß zumindest die zweite Ansaugöffnung (10), die zweite Saugeinrichtung (12) und die Verteilungskammer Teile eines länglichen, vorgefertigten Einsatzes (28) sind, welcher in das Gehäuse (1) eingefügt und aus ihm ausgebaut werden kann, ohne daß das Gehäuse von dem genannten Arbeitsplatz entfernt werden muß, und daß die Vorrichtung eine Halterung zum Halten des Einsatzes an der oberen Begrenzungswand des Gehäuses oder alternativ seiner Seitenwand aufweist.
  10. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das Gehäuse (1) zwei Seitenwände (4) hat, deren Längsrichtungen im wesentlichen parallel zueinander verlaufen und die beide in einem Raum oberhalb und in der Nähe eines Arbeitsplatzes angeordnet sind, daß die Vorrichtung eine Spiegelsymmetrie aufweist, wobei die Symmetrieebene vertikal und parallel zu den Längsrichtungen der Seitenwände verläuft, und daß die Symmetrieebene einen hinter den beiden ersten Ansaugöffnungen vorgesehenen, den Ansaugöffnungen gemeinsamen Raum (2) kreuzt, der mit einer einzigen ersten Saugeinrichtung verbunden ist, während die anderen Teile der Vorrichtung doppelt vorgesehen sind.
EP89905812A 1987-10-13 1989-04-10 Sauganordnung Expired - Lifetime EP0466687B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89905812T ATE108099T1 (de) 1989-04-10 1989-04-10 Sauganordnung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8703959A SE459324B (sv) 1987-10-13 1987-10-13 Suganordning vid kaapor
PCT/SE1989/000188 WO1990011844A1 (en) 1987-10-13 1989-04-10 Suction device

Publications (2)

Publication Number Publication Date
EP0466687A1 EP0466687A1 (de) 1992-01-22
EP0466687B1 true EP0466687B1 (de) 1994-07-06

Family

ID=20369858

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89905812A Expired - Lifetime EP0466687B1 (de) 1987-10-13 1989-04-10 Sauganordnung

Country Status (7)

Country Link
EP (1) EP0466687B1 (de)
DE (1) DE68916654T2 (de)
DK (1) DK161691A (de)
FI (1) FI95670C (de)
NO (1) NO174173C (de)
SE (1) SE459324B (de)
WO (1) WO1990011844A1 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE459324B (sv) * 1987-10-13 1989-06-26 Hedesunda Plast & Metall Suganordning vid kaapor
FI84096B (fi) * 1990-01-31 1991-06-28 Halton Oy Undertakskonstruktion och foerfarande foer att bringa luften att stroemma i samband med undertakskonstruktionen.
US5180308A (en) * 1992-01-06 1993-01-19 Garito Jon C Medical demonstration model
FR2764530A1 (fr) * 1997-06-13 1998-12-18 Soc Ftsa Hotte de depoussierage
FR2911520B1 (fr) * 2007-01-19 2009-08-28 Roblin Sas Soc Par Actions Sim Hotte aspirante pour cuisine
KR101113674B1 (ko) * 2009-11-16 2012-02-14 현대자동차주식회사 차량의 이물질 비산방지장치
KR101173491B1 (ko) 2010-08-11 2012-08-14 현대로템 주식회사 철도차량의 공기배출덕트용 소음방지체
EP2739911B1 (de) * 2011-08-04 2016-07-06 Indesit Company, S.p.A. Verbesserte rauchabzugseinrichtung und/oder filtrierhaube, insbesondere für eine haushaltsküche
ITTO20111226A1 (it) * 2011-12-29 2013-06-30 Indesit Co Spa Filtro grassi per cappa da cucina e relativa cappa da cucina
EP2610555B1 (de) * 2011-12-29 2016-12-14 Indesit Company S.p.A. Dunstabzugshaube mit einem Fettfilter
ITTO20111227A1 (it) * 2011-12-29 2013-06-30 Indesit Co Spa Filtro grassi per cappa da cucina e relativa cappa da cucina
SI24329B (sl) * 2013-03-14 2022-05-31 Provent D.O.O. Kuhinjska napa
WO2015057072A1 (en) * 2013-10-17 2015-04-23 Randolph Beleggingen B.V. Kitchen air extraction canopy having a cavity with air guiding and directing delimiting wall

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837269A (en) * 1972-11-22 1974-09-24 Elster S Inc Effluent ventilation and cleaning apparatus
FI49113C (fi) * 1973-10-16 1975-04-10 Viljo Juhana Jaervenpaeae Syklonierotin.
US4050367A (en) * 1976-05-06 1977-09-27 Marion L. Eakes Co. Ventilating system for industrial machines
SE411133B (sv) * 1978-04-21 1979-12-03 Bahco Ventilation Ab Sett och anordning att vid defibrering av flis i anga tranportera framstelld fibermassa fran en defibror till en avskiljare
FR2476505A1 (fr) * 1980-02-21 1981-08-28 Ermap Depoussiereur du type cyclone dynamique pour fluides gazeux
FI71831C (fi) * 1985-04-12 1987-02-09 Halton Oy Fraonluftsanordning.
SE459324B (sv) * 1987-10-13 1989-06-26 Hedesunda Plast & Metall Suganordning vid kaapor

Also Published As

Publication number Publication date
DE68916654D1 (de) 1994-08-11
FI914443A0 (fi) 1991-09-23
FI95670B (fi) 1995-11-30
SE8703959D0 (sv) 1987-10-13
DK161691D0 (da) 1991-09-19
SE459324B (sv) 1989-06-26
WO1990011844A1 (en) 1990-10-18
FI95670C (fi) 1996-03-11
NO174173B (no) 1993-12-13
NO913962L (no) 1991-10-10
SE8703959L (sv) 1989-04-14
NO174173C (no) 1994-03-23
DK161691A (da) 1991-10-09
NO913962D0 (no) 1991-10-10
DE68916654T2 (de) 1995-03-02
EP0466687A1 (de) 1992-01-22

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