EP0722071A2 - Filter- und Abzughaube mit Regelung des Luftstromes - Google Patents

Filter- und Abzughaube mit Regelung des Luftstromes Download PDF

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Publication number
EP0722071A2
EP0722071A2 EP96100365A EP96100365A EP0722071A2 EP 0722071 A2 EP0722071 A2 EP 0722071A2 EP 96100365 A EP96100365 A EP 96100365A EP 96100365 A EP96100365 A EP 96100365A EP 0722071 A2 EP0722071 A2 EP 0722071A2
Authority
EP
European Patent Office
Prior art keywords
hood
air
envelope
hollow
hollow means
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
EP96100365A
Other languages
English (en)
French (fr)
Other versions
EP0722071B1 (de
EP0722071A3 (de
Inventor
Pierluigi Pettinari
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.)
Turboair SpA
Original Assignee
Turboair SpA
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 Turboair SpA filed Critical Turboair SpA
Priority claimed from US08/585,193 external-priority patent/US5738083A/en
Publication of EP0722071A2 publication Critical patent/EP0722071A2/de
Publication of EP0722071A3 publication Critical patent/EP0722071A3/de
Application granted granted Critical
Publication of EP0722071B1 publication Critical patent/EP0722071B1/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

Definitions

  • the present invention relates to a hood for the suction and/or the filtration of the cooking fumes in a domestic kitchen.
  • hoods for domestic use which are used for eliminating the cooking smells in a kitchen; said hoods are called suction hoods if they expel outside the kitchen the air drawn from above the hobs, or filtration hoods if they recycle the air in the room, after having purified it.
  • the air is usually expelled from the hood by means of louvers being present in correspondence of its front part; this is the simplest and cheapest embodiment, because no additional tubes are necessary and the wall cabinet arranged above the hood is free for other purposes, because it is not crossed by the conduit which conveys the air towards the outside; however, due to the fact that the air expelled in this way can be very noisy (because it exits the hood at the users' head height), often it is preferred to expel the air towards the ceiling, by means of a conduit being hidden in an overhanging wall cabinet and which ends on the top of the wall cabinet itself.
  • the known hoods may provide for four operating modes: a filtration mode towards the front part (FA), a filtration mode towards the upper part (FA), a suction mode towards the rear part (AP), a suction mode towards the upper part (AS).
  • FA front part
  • FA filtration mode towards the upper part
  • AP suction mode towards the rear part
  • AS suction mode towards the upper part
  • the known hoods are usually conceived so as to provide all the above mentioned four operating modes, which can be set in part by the installer and in part by the final user of the hood; several users, in fact, prefer to filter and recycle the air during winter, for energy saving reasons, while they prefer to expels the fumes for the remaining part of the year.
  • the treatment and the path of the air which crosses, in the upward direction, the hood is substantially identical for all the products available on the market: firstly, the air passes through a mechanical filter, called grease filter, which also serves as a panel for closing the lower part of the hood and can be removed and cleaned by the user; said filter, which is always present, retains solid floating residues being conveyed by the cooking fumes, so as to protect the hood from dirt.
  • a mechanical filter called grease filter
  • the air path further includes an activated-carbon filter, which absorbs the smells deriving from the cooking; this filter has to be easily accessible, so that the user can replace it once exhausted; the efficiency and the duration of this filter are improved, if its volume and section crossed by the air are large.
  • the air is then inhaled by a fan, which is usually of the centrifugal type, inasmuch as axial fans do not have a sufficient head, and then conveyed in a conduit towards one of the possible outlets.
  • a fan which is usually of the centrifugal type, inasmuch as axial fans do not have a sufficient head, and then conveyed in a conduit towards one of the possible outlets.
  • a plug or predetermined fracture zones determines whether the air will exit the hood in the upward or the rear direction.
  • the user by manoeuvring an appropriate deflection valve which has an easily accessible rod, can cause the air to exit by the front louvers of the hood.
  • a hood being of a good quality should therefore satisfy the following requisites: a sufficient air head in the suction mode; a good capacity of reducing the smells in the filtration mode, and therefore a large frontal surface of the activated-carbon filter; a reduced noise; reduced dimensions, for optimization of the available spaces; last but not least, also the aesthetic features are very important, which force the design of hoods to be of a very reduced height.
  • the activated-carbon filter is constituted by a single cartridge which is fixed to the nosepiece of the fan (as shown in Figure 3); in this way the fixing and the replacement of the exhaust cartridge is very easy but, as already said, due to the need of realizing very thin hoods, the space which remains between the grease filter and the activated-carbon filter is reduced and therefore this fact determines chokes around the edge of the activated-carbon cartridge.
  • Said fixing mode therefore causes the grease filter not to be very efficient, because a great part of the air is inhaled exclusively in its central zone, near the nosepiece; in said zone, an unpleasant grease spot is therefore rapidly created on the external side, which makes evident a non uniform air distribution.
  • a further drawback is finally constituted by the fact that, in order to pass from a filtration mode to a suction mode, the filter cartridge has to be removed from the hood and stored in another place.
  • a first aim of the invention is that of allowing the reduction of the height of the hood or, more generally, of allowing the reduction of the dimensions of the hood in the direction being parallel to the fan axis, even improving the degree of uniformity of the air flow through the grease filter.
  • a second aim of the present invention in that of showing how it is possible to install activated-carbon filters being larger that the usual ones, and whose dimensions are limited only by the plan dimensions of the hood itself and not by its thickness, so as to improve the filtration efficiency.
  • Another aim of the present invention is that of indicating a hood which, in the most general case, allows for the commutation from among the four operating modes without the necessity of a flow deflection valve or closure plugs for the outlets being not used.
  • a hood 1 With reference to Figure 1, the installation of a hood 1 is usually carried out by fixing it underneath a wall cabinet 3; the air inhaled from a cooking hob, when filtered, may be recycled in the room through louvers being present on the front part 2 of the hood 1, or through a tube 4 being hidden by said wall cabinet 3; alternatively, when the inhaled air is expelled, this can occur by means of said tube 4, which is connected to a further conduit 5 directed outside of the room, or directly through a hole 6 being present in the rear part of the hood 1.
  • the air flow following the direction of the arrows, crosses a grease filter 7, and then, according to prior art, an activated-carbon filter 8 (when present), a suction fan and the relative scroll 9; a valve 10, when in position 10A, provides for deflecting the flow in the direction of the front part 2, while in position 10B directs the flow in the direction of one of the two exit, the upper one 4 or the rear one 6; a plug 11A, or other suitable closure means, establishes at the installation, if the hood must to have an upper exit 4 or a rear exit 6; in this latter case, the plug is mounted in the position 11B.
  • FIG 4 there are shown, arranged according to the prior art, a fan 9B, the deflection valve 10, the upper exit 4 or the rear exit 6, the front exit 2.
  • an envelope 12 is shown, according to a first possible embodiment of the invention, which has an air inlet 13 connected to the discharge of the fan, not shown in the figure; said inlet 13 is subdivided into two zones, an upper one 13A and a lower 13B one, being separated in the figure by a dotted line; the figure shows furthermore outlets 14, 15, 16, for the connection, respectively, with the front exit 2, the upper exit 4 and the rear exit 6 of Figure 1; under the envelope 12 a hollow means, or container 17, is shown, according to a first embodiment of the invention, in the following four possible advantageous positions:
  • References 18A, 18B, 18C, 18D, 18E, 18F, 18G indicate different openings being provided in the container 17; with 19 a lower cover, or other closure means, is indicated, used for closing the container 17 according to one of the position 17A, 17B, 17C, 17D within the envelope or seat 12; the hatched zone 20 indicates a medium zone, wherein air treatment means are located, when being present inside the container 17; said treatment means are not represented in the figure, for clarity purposes.
  • Figure 9 shows in section the grease filter 7, the nosepiece 9A, the fan 9B, the scroll 9, the opening 13A-13B, the envelope 12 with the relevant openings 14, 15 and 16; with 17' the deflection means of Figure 6 is indicated, in the position 17A, corresponding to the upper filtration mode (FS); with 19 the lower closure means is indicated and with 20A a zone being delimited by air permeable walls 20B is indicated, which contains the air treatment means, such as an activated-carbon filter.
  • the air treatment means such as an activated-carbon filter.
  • Figures 10 and 11 refer to an embodiment of the invention, which differs from that of Figures 5 to 9; however, for clarity reasons, similar components are indicated with the same numbers already utilized in the previous Figures; thus, an envelope 12 is shown, having an opening 14 in the direction of the front part, a scroll with an inlet nosepiece 9A and finally two air outlets, i.e. one, indicated with 13, towards the envelope 12, and the other, indicated with 15, towards the upper discharge of the hood.
  • FIG 12 there is shown, in accordance with a second possible embodiment of the invention, an envelope 12' having an air inlet opening 13', being divided into the two zones 13A' and 13B', and connected to the discharge of the fan, not shown in the Figure; furthermore, there are shown the outlet 14' towards the front discharge 2 of Figure 1; under the envelope 12 a flow deflection means 17'' is indicated, in the position 17A provided for the front filtration operating mode (FA); in 17B, the container 17'' is shown in the position being provided for the upper filtration operating mode (FS); references 18A'', 18B'', 18C'', 18D'' show different openings provided in said container, even if they do not necessarily correspond to those shown in Figures 5 and 6; with 19 the cover of lower closure means is indicated, for closing the container 17'' according to one of the positions 17A or 17B within the envelope 12; the hatched part 20 indicates a zone being delimited by air permeable walls, which contains the air treatment means, such as the cited activated
  • Figure 12A a device is shown, functionally similar to that of Figure 12, but having a substantially cylindrical shape, where the similar parts have been indicated with the same reference numbers utilized in Figure 12; it is evident that, in the same way, a cylindrical device derived from Figure 5 could be obtained.
  • FIG 13 there are shown the inlet nosepiece 9A of the scroll 9, the fan 9B, a deflection throttle-valve 21 of the air flow, in the possible positions 21A and 21B, the container 17 having, in an intermediate position, an air permeable means to the air (such as the cited activated-carbon filter 20A), the opening 14 towards the front exit 2 of Figure 1, the outlet 15 in the direction of the upper part, the closure means 19 of the envelope 12.
  • an air permeable means to the air such as the cited activated-carbon filter 20A
  • FIG 14 the container 17'' is shown in section, according to the position 17B of Fig. 12, and an incorporated air treatment means 20.
  • Figure 15 the container 17'' is shown in section, according to the position 17B of Fig. 12, with a housing seat 22 and the air treatment means 20A being evidenced.
  • Figure 16 the container 17 is shown in accordance with Figure 5, which has graphic symbols FA, FS, AS and AP; the container 17 is represented in plan, according to the positions 17A and 17B.
  • the air inhaled by the fan is introduced through the scroll 9 in the envelope 12; if said envelope 12, rather that of providing for deflection means, were closed downwards by the cover 19 of Figure 5, the air could simultaneously exit through the outlets 14, 15 and 16; on the contrary, with reference to Figure 5, if the container 17 were arranged within the envelope 12 in any position and said envelope 12 were closed with the cover 19, it is clear that said container 17 would partially obstructs the inlet 13 (part 13A or part 13B), and two of the three outlets 14, 15 and 16. In fact, said container 17 has a size of such to enter with a good precision the envelope 12, so that the air can pass only through the free openings, without any substantial undesired leak through skylights and fissures.
  • the air can only enter the envelope 12 through the zone 13B of the inlet 13, which is left free by the opening 18A of the container 17, and can only exit in the direction of the front part 2 of Figure 1 through the outlet 14, which is left free by the opening 18B, and only after having crossed the middle plane 20 of said container 17, while the outlets 15 and 16 are closed by the walls of the same container 17.
  • the air enters through the openings 13A and 18C, crosses the middle plane 20 and then exits the outlet 15, which is left free by the opening 18D, towards the upper discharge 4 of Figure 1; by overturning the container 17 in the position 17C, which corresponds to the rear suction operating mode (AP), the air enters the envelope 12 and the container 17 through the facing openings 13B and 18E, and therefore the air, without crossing the middle plane storey 20, exits by the openings 18B and 16 in the direction of the rear part 6 of Figure 1.
  • FS upper filtration mode
  • the position 17D is obtained, which corresponds to the upper suction operating mode (AS), in which the air enters the envelope 12 through the zone 13A of the inlet 13, which is left free by the opening 18F of the container 17; the air therefore exits the openings 18G and 15 towards the upper discharge 4 of Figure 1, in the same way as position 17B, but now the air cannot cross the middle plane 20.
  • AS upper suction operating mode
  • closure means 19 and the envelope 12 that house the container 17, could be coupled on any surface, even if not flat, rather than on the lower face as shown in Figure 5; for example, the cover 19 could close on a lateral face and the container 17 will be inserted in the envelope 12 such as a drawer; alternatively, the cover 19 may not be necessary, and be replaced by a continuous face, without any openings, of the container 17; this would be possible, for example, when only the operating mode allowed by the positions 17A and 17B of Figure 5 are provided; in this case, therefore, the opening 18G would not be necessary.
  • envelope 12 which substantially delimits an ensemble of surfaces housing the container 17, might be not expressly realized: it might be totally or partially obtained by the surfaces of the surrounding bodies and means, such as for example the horizontal and vertical walls of the hood.
  • container 17 does not necessarily have to be of a box shape as in Figure 5 but, as illustrated in Figure 6, it could be simply composed by a sort of frame 17', having walls only where these are necessary for realizing an obstacle to the air flow, or for ensuring structural sturdiness, or for supporting air treatment means eventually and advantageously contained within.
  • Figure 9 illustrates the same case of Figure 6 with the means or container 17' in the position 17B.
  • the deflection means 21 For obtaining the upper suction mode (AS), the deflection means 21 has to be set in the position 21B of Figure 13, while the position of the container 17 is not relevant, being excluded from the air circuit; on the other hand, for obtaining the filtration mode, the deflection means 21 has to be set in the position 21A of Figure 13, so that the air can enter the envelope 12 and obliged to pass through the means 20A; in that case, the upper filtration mode (FS) is obtained, if the container 17 is arranged in the position 17B, while the front filtration mode (FA) is obtained when the container 17 is arranged in the position 17A.
  • AS upper suction mode
  • FA front filtration mode
  • Figure 12A shows the same device already illustrated in Figure 12, with the difference that now it has a substantially cylindrical shape; it is evident that a rotation of 180° of the device modifies the way of functioning exactly as illustrated in Figure 12, with the advantage that the rotation of an element being of cylindrical shape can be realized by means of a suitable command means provided by the hood, for example a tripping knob, having a suitable mechanism, for changing the position of the cylindrical container 12' without any intervention within the hood itself.
  • a suitable command means provided by the hood, for example a tripping knob, having a suitable mechanism, for changing the position of the cylindrical container 12' without any intervention within the hood itself.
  • Figure 12B shows on the other end how the same way of functioning of Figures 10, 11, 12 and 13 could be obtained, according to a further embodiment of the flow deflection device according to the invention, not by rotating the container 17'', but overturning it; it can moreover be noticed that, in the illustrated embodiment of Fig. 12B, the cover 19 is not necessary.
  • Figure 14 shows how, in a preferred embodiment, the container 17'' can be constituted by a cartridge, containing an activated-carbon filter 20A, having lateral walls conformed for example as in Figure 12. Such a cartridge 17'' is drawn and replaced when the activated-carbon has lost its filtration efficiency.
  • the container 17'' in correspondence of the middle axis, has a hollow 22 wherein the real activated-carbon filter 20A is inserted, or any other air treatment means, that has to be drawn once exhausted.
  • the filtering means downstream the scroll does not require additional spaces, but instead it better utilizes that already existing; it simplifies the conduits downstream the scroll and finally allows the use of filters having an effective passage section, of the desired dimensions, being limited only by the external dimensions of the hood.
  • the zone effectively crossed by the air is limited to the area of the nosepiece.

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  • 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)
  • Ventilation (AREA)
EP96100365A 1995-01-12 1996-01-11 Filter- und Abzughaube mit Regelung des Luftstromes Expired - Lifetime EP0722071B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT95TO000013A IT1278954B1 (it) 1995-01-12 1995-01-12 Cappa aspirante e/o filtrante, con mezzi deviatori di flusso migliorati
ITTO950013 1995-01-12
US08/585,193 US5738083A (en) 1995-01-12 1996-01-11 Flow deflector for filtration hood

Publications (3)

Publication Number Publication Date
EP0722071A2 true EP0722071A2 (de) 1996-07-17
EP0722071A3 EP0722071A3 (de) 1998-01-28
EP0722071B1 EP0722071B1 (de) 2002-05-08

Family

ID=26332277

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96100365A Expired - Lifetime EP0722071B1 (de) 1995-01-12 1996-01-11 Filter- und Abzughaube mit Regelung des Luftstromes

Country Status (2)

Country Link
EP (1) EP0722071B1 (de)
IT (1) IT1278954B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4286750A1 (de) * 2022-06-02 2023-12-06 Electrolux Appliances Aktiebolag Extraktionsvorrichtung, kombinationsgerät und verfahren zum betrieb einer extraktionsvorrichtung oder eines kombigerätes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2336986A1 (fr) * 1975-12-31 1977-07-29 Rainox Spa Hotte d'aspiration
DE3040051A1 (de) * 1980-10-23 1982-06-03 Georg Röhl, Lichttechnische Spezialfabrik, Apparate- und Gerätebau GmbH & Co KG, 8400 Regensburg Steuervorrichtung fuer abluft-umluft-foerdergeraete und -systeme, insbesondere fuer dunstabzugshauben
AT387508B (de) * 1986-09-03 1989-02-10 Austria Haustechnik Dunstabzugshaube

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2336986A1 (fr) * 1975-12-31 1977-07-29 Rainox Spa Hotte d'aspiration
DE3040051A1 (de) * 1980-10-23 1982-06-03 Georg Röhl, Lichttechnische Spezialfabrik, Apparate- und Gerätebau GmbH & Co KG, 8400 Regensburg Steuervorrichtung fuer abluft-umluft-foerdergeraete und -systeme, insbesondere fuer dunstabzugshauben
AT387508B (de) * 1986-09-03 1989-02-10 Austria Haustechnik Dunstabzugshaube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4286750A1 (de) * 2022-06-02 2023-12-06 Electrolux Appliances Aktiebolag Extraktionsvorrichtung, kombinationsgerät und verfahren zum betrieb einer extraktionsvorrichtung oder eines kombigerätes

Also Published As

Publication number Publication date
ITTO950013A0 (it) 1995-01-12
IT1278954B1 (it) 1997-12-02
ITTO950013A1 (it) 1996-07-12
EP0722071B1 (de) 2002-05-08
EP0722071A3 (de) 1998-01-28

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