[0001] The present invention relates to a hood for the suction and /or the filtration of
the cooking fumes in a domestic kitchen.
[0002] Various types of hoods for domestic use are known, 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.
[0003] In the aspiration mode, in most cases, the air is expelled from the hood in an upward
direction, through a conduit being contained and hidden by a overhanging wall cabinet,
which expels the air towards the ceiling of the kitchen. Said conduit has usually
its axis on the middle vertical plane of the hood, for aesthetic reasons if it is
in view, and for reasons of standardization if it is mounted within the wall cabinet.
[0004] If the hood is fixed to a wall which is directed outside the building, the air can
be expelled towards the rear part of the hood; this embodiment, which is aesthetically
pleasant due to the absence of a conduit in view, is however rarely used, because
it requires the hole in the wall to be previously made in a very precise position.
[0005] On the contrary, in the filtration mode, 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.
[0006] Summarizing, therefore, 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).
[0007] In order to reduce the diversification, 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.
[0008] 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. There are no problems
in realizing a sufficiently large grease filter, but care should be taken that the
air crosses it without any preferential path.
[0009] In the filtration mode, 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.
[0010] After having passed through the above mentioned filters, 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.
[0011] In the most common case, during the installation, a plug or predetermined fracture
zones determines whether the air will exit the hood in the upward or the rear direction.
The user, on the other hand, 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.
[0012] 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.
[0013] As a general practice, 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.
[0014] 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.
[0015] From the same Figure 3 it is evident how, according to said solution, there is no
reason for mounting carbon filters having very large dimensions, inasmuch, considering
the reduced available space, preferential paths will be created within them, in correspondence
of the axis of the nosepiece, while the periphery of the cartridge will not be efficiently
exploited; for this reason, the limits to the height of the hood also determines limits
for the extension of the cross section of the activated-carbon filter, and therefore,
limits to the performances of the hood in relation to the filtration efficiency and
charge losses.
[0016] From Figure 4, which shows a typical development of the conduits which extend downstream
the fan, it is evident that, always due to the reduced spaces available, the air in
the front filtration mode, is compelled to follow a tortuous path, which causes great
noise and charge losses, thus limiting the air head which can be inhaled. From the
same figure, it is also evident that the same conduits do not leave space for mounting
the activated-carbon filter downstream the fan, and upstream the valve for deflecting
the air towards the upper or the front part of the hood.
[0017] In order to have reduced overall dimensions, some models of hoods are partially encased
within the overhanging wall cabinet, with the further drawback that, besides the higher
costs, the different dimensional bindings proper of the different furniture producers
have to be duly taken into account.
[0018] 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.
[0019] From FR-A-2.336.983 a hood is also known, having a fan whose scroll is angularly
movable by 180°, between two operating position; in this way, depending upon the angular
position set for the scroll, the air sucked in the inlet of the fan can be alternatively
directed to a first or a second discharge opening of the hood.
[0020] The present invention has the aim of resolving the above mentioned drawbacks. In
this light, 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.
[0021] 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.
[0022] 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.
[0023] These and further aims are attained according to the present invention by a hood
for the suction and/or the filtration of cooking fumes in a domestic kitchen having
the characterizing features of claim 1; further advantageous embodiment of the invention
are then contained in the dependent claims.
[0024] Further characteristics and advantages of the present invention will result in being
clear from an illustration of the hoods according to the prior art and from the description
of some preferred, but not exclusive, embodiments of the hood according to the invention,
which are shown as a pure example in the following figures (wherein the parts which
do not pertain to the invention have been omitted):
Figure 1 is a side view of a hood. as it is normally installed above a cooking hob,
which shows the air exit zones in the different operating modes, i.e. filtration or
suction:
Figures 2 to 4 show how the filter means and the air conduits are arranged in a hood
according to the prior art; in particular, Figure 2 shows in a schematic way the air
flow from the drawing zone towards one of the three possible outlets; Figure 3 shows
with a side cross section the activated-carbon filter fixed to the nosepiece of the
fan and the effects of this assembly on the flow of the inhaled air: Figure 4 shows,
with a horizontal cross section, how the air conduits from the fan scroll to the three
possible outlets are realized in the known hoods.
- Figure 5 shows, with an exploded axonometric e schematic view, in accordance with
one of the preferred embodiments of the invention which does not require any additional
flow deflection means, the four operating modes of the hood which are possible in
accordance with the invention;
- Figure 6 shows, with an exploded axonometric and schematic view, substantially similar
to that of Figure 5, a container being of simplified construction, where the material
constituting its external surface is present only in the essential points for structural
reasons and for attaining the aim of the invention;
- Figure 7 shows, with an axonometric view, the assembly of the ventilation group and
a flow deflection filter according to the embodiment of the invention shown in Figure
5;
- Figure 8 shows, with a plan view, the assembly of the ventilation group and a flow
deflection filter according to the embodiment of the invention shown in Figure 5;
- Figure 9 shows, for clarity purposes, a section of Figure 8 according to line A -
A;
- Figure 10 shows, with an axonometric view, the assembly of the ventilation group and
a flow deflection filter according to a different possible embodiment of the invention;
- Figure 11 shows, with a plan view, the assembly of the ventilation group and a flow
deflection filter according to the embodiment of the invention shown in Figure 10;
- Figure 12 shows, with an exploded axonometric and schematic view and in accordance
with the embodiment of Figure 10, the flow deflection filter with the container according
to the invention arranged in the two advantageous position for said embodiment;
- Figure 12A shows, with an exploded axonometric and schematic view, the flow deflection
filter with the container according to the invention and in accordance with Figure
12, but having a cylindrical shape instead of a parallelepiped one;
- Figure 12B shows, with an exploded axonometric and schematic view, the flow deflection
filter according to an embodiment being different from the preceding ones, which allows
for the same operating modes already shown in Figure 12;
- Figure 13 shows three cross sections of Figure 11, according to line B - B, for indicating
the air path respectively in the Front Filtration mode, the Upper Filtration mode
and the Upper Suction mode;
- Figure 14 shows, with a vertical cross section, one of the possible embodiments of
the container according to the invention;
- Figure 15 shows, with a vertical cross section, a further possible embodiment of the
container according to the invention;
- Figure 16 shows graphic symbols stamped on the two main surfaces of the container
in accordance with the embodiment of the invention shown in Figure 5.
[0025] 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.
[0026] With reference to Figure 2, 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.
[0027] In Figure 3 the grease filter 7 and the activated-carbon filter 8 are shown, according
to another pertinent solution of the prior art, the filter 8 having a lower surface
8A permeable to the air and a side wall 8B of a compact material; said filter 8 is
mounted on the nosepiece 9A of the fan, not shown in the figure, and is removed in
the suction mode.
[0028] In Figure 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.
[0029] In Figure 5 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:
- 17A indicates the arrangement in which said container 17 is in the position provided
for the front filtration operating mode (FA);
- 17B indicates the arrangement in which said container 17 is in the position provided
for the upper filtration operating mode (FS); said position 17B is obtained from the
previous one (17A), by rotating the container 17 180° around the vertical axis;
- 17C indicates the arrangement in which said container 17 is in the position provided
for the rear suction operating mode (AP); said position 17C is obtained from the previous
one (17B), by overturning the container 17;
- 17D indicates the arrangement in which said container 17 is in the position provided
for the upper suction operating mode (FA); said position 17D is obtained from the
previous one (17C), by rotating the container 17 180° around the vertical axis.
[0030] 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.
[0031] In Figure 6, with 12 the same envelope of Figure 5 is indicated; with references
17A, 17B, 17D, 17C four different positions as are indicated for a single air flow
deflection means 17', wherein the suffixes from "A" to "D" indicates the same position
as already shown in Figure 5; references 18A', 18C', 18F' indicate openings having
the same function of the corresponding openings 18A, 18C, 18F of Figure 5; with 18BE'
a single opening is indicated, that in Figure 5 was instead divided into two openings,
respectively 18B and 18E; the hatched zone 20 indicates the position for the air treatment
means being eventually present, similarly to Figure 5, and with 19 the lower closure
means is indicated. The hollow means 17' has the same function as the container 17
of Figure 5, but in the case shown in Figure 6, it is composed by a sort of frame,
which has walls only where necessary for functional or structural reasons.
[0032] In Figures 7 and 8, the openings in the envelope 12 are indicated, with the same
reference numbers of Figure 5; therefore, 13 is the inlet for the air coming from
the scroll 9, while 14, 15, 16 indicate respectively the front exit, the upper exit
and the rear exit.
[0033] 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.
[0034] 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.
[0035] In Figure 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-carbon filter, being eventually present within the container
17".
[0036] In 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.
[0037] In Figure 12B a further embodiment of the deflection device of the hood according
to invention is shown; the similar parts have been indicated with the same reference
numbers utilized in Figure 12.
[0038] In Figure 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.
[0039] In Figure 14 the container 17" is shown in section, according to the position 17B
of Fig. 12, and an incorporated air treatment means 20. In 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.
[0040] In 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.
[0041] It is clear that, though not represented, many other embodiments are possible for
the system without departing from the inventive idea, some of which will be briefly
cited in the following functioning description.
[0042] The functioning and the advantages of the flow deflection filter according to invention
will be now described.
[0043] With reference to Figures 7 and 8, 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. If the container
17 is inserted in the position 17A, to which corresponds the cited front filtration
operating mode (FA), 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.
[0044] Similarly, with the container 17 being rotated 180° in the position 17B, i.e. for
the so-called upper filtration mode (FS), 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.
[0045] Finally, by rotating again the envelope 180°, 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.
[0046] It is evident that the 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.
[0047] It is furthermore evident that the 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.
[0048] It is also evident that the 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.
[0049] For a better understanding of the way of functioning, Figure 9 illustrates the same
case of Figure 6 with the means or container 17' in the position 17B.
[0050] The air enters the envelope 12 through the opening 13B, underlying the air permeable
means 20A and arranged in the middle plane of the container 17'; due to the fact that
the outlets 14 and 16 are closed by the container 17', the air is obliged to exit
only through the outlet 15, after having crossed the means 20A, that could be advantageously
constituted by an activated-carbon filter or other air treatment means.
[0051] In Figures 10, 11, 12 and 13 a preferred embodiment of the invention is shown, for
the case in which the available space in width for the hood is not sufficient to realise
the outlet 15, for the coupling with the upper exit conduit in the direction of the
channel 4 of Figure 1, directly on the envelope 12 and, as it happens in most cases,
the rear exit is not provided. In fact, if the space in width is not sufficient, said
opening 15 has to be realized in correspondence with the exit of the scroll 9; in
that case, for the deflection of the air flow the auxiliary deflection means 21 of
Figure 13 is used. 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.
[0052] In order to illustrate the versatility of the invention, 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.
[0053] 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.
[0054] 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. In Figure 15, on the other end, 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.
[0055] Apparently, it may seem complicated to entrust the user with the task of orienting
the container 17 or 17", or the frame 17', in the correct way; however, on the contrary,
from Figure 16, for this purpose it is sufficient to mark the end of the relevant
faces with suitable duly oriented symbols; for example said container 17 is shown
according to the positions 17A and 17C of Figure 5, and the symbols FA, FS, AP, AS,
have been used, which are the initials, in the Italian language, of the previously
described operating mode (front filtering, upper filtering, rear suction , upper suction).
[0056] It is evident from the given description how the present invention introduces important
improvements to the functioning of hoods.
[0057] According to the invention, it is in fact possible to eliminate the activated-carbon
filter from the scroll inlet, thus freeing some space for an improved uniform circulation
of the air between the grease filter and the nosepiece of the fan, and also reducing
the overall height of the hood. The arrangement of the filtering means downstream
the scroll, according to the present teachings, 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.
On the contrary, it has been seen that in a filter, even being very wide, mounted
on the nosepiece, the zone effectively crossed by the air is limited to the area of
the nosepiece.
1. Suction and/or filtration hood, having a flow deflection device (12,17;12',17';17")
which comprises
- an outer seat or envelope (12;12') defining one or more inlets (13) and one or more
outlets (14-16),
- a hollow means (17;17';17") having a plurality of apertures (18A-18G) in communication
with a chamber defined therein through which air can pass,
said hollow means (17;17';17") being capable of being oriented, within said outer
seat (12;12'), in a plurality of different alternative positions (17A,17B,17C,17D)
whereat
- one inlet (13) of the outer seat (12;12') is in alignment with one aperture (18A-18G)
of the hollow means (17;17';17") and one outlet (14-16) of the outer seat (12;12')
is in alignment with another aperture (18A-18G) of the hollow means (17;17';17"),
characterized in that, in each of said positions (17A,17B,17C,17D), said outer seat (12;12') obstructs all
apertures (18A-18G) of said hollow means (17;17';17") other than said one aperture
and said another aperture, and said hollow means (17;17';17") obstructs all inlets
and outlets (13-16) of said outer seat (12;12') other than said one inlet (13) and
said one outlet (14-16), whereby air can flow through said chamber only between said
one inlet (13) and said one outlet (14-16).
2. Hood, according to claim 1, characterized in that, in each of said positions (17A,17B,17C,17D), said one aperture (18A-18G) and/or
said another aperture (18A-18G) is out of alignment with the inlet or outlet (13-16)
with which it is aligned at another of said position (17A,17B,17C,17D).
3. Hood, according to claim 1, characterized in that it comprises a fan (9B) having a respective scroll (9), said outer seat (12;12')
being in a fixed relative position with respect to said scroll (9).
4. Hood, according to claim 1, characterized in that said hollow means (17;17'17") comprises an internal plane (20) where air treatment
means (20A) are arranged, the air being compelled or impeded to pass through said
internal plane (20) depending upon the position (17A,17B,17C,17D) chosen for said
hollow means (17;17'17") within said outer seat (12;12').
5. Hood, according to claim 1, characterized in that said outer seat (12;12') and said hollow means (17;17") are respectively constituted
by box-like bodies, having in particular an external surface being substantially parallelepiped
or cylindrical shaped.
6. Hood, according to one or more of the previous claims, characterized in that two inlets (13A,13B) of said outer seat (12;12') are realized by two distinct zones
of a single opening (13), each of said two inlets (13A,13B) being in particular selectable
by changing the position of said hollow means (17;17';17") inside said outer seat.
7. Hood, according to one or more of the previous claims, characterized in that said outer seat (12;12') is totally or in part obtained by means of bodies surfaces
and means which surround the hollow means (17;17'17"), such as for instance vertical
or horizontal walls of the hood.
8. Hood, according to one or more of the previous claims, characterized in that said hollow means (17;17'17") is constituted by a frame (17') having walls only where
necessary, for functional or structural or support functions.
9. Hood, according to one or more of the previous claims, characterized in that said hollow means (17;17'17") is contained within said outer seat (12;12') by means
of a closure means (19), being substantially flat, wherein in particular said closure
means (19) and said outer seat (12;12') which contains said hollow means (17;17'17")
can be coupled on any surface, even a not flat one.
10. Hood, according to one or more of the previous claims, characterized in that an additional flow deflection means (21) is provided, which compels the air to pass
through said hollow means (17;17';17") or to by-pass it for a direct exit through
a discharge aperture (15), said additional flow deflection device comprising in particular
a throttle-valve.
11. Hood, according to one or more of the previous claims, characterized in that said hollow means (17;17'17") contains means for the air treatment (20A), said air
treatment means (20A) being in particular arranged in a zone which is crossed, or
not, by the air depending upon the position (17A,17B,17C,17D) chosen for said hollow
means (17;17'17").
12. Hood, according to the previous claim, characterized in that said air treatment means (20A) are constituted by air permeable walls (20B), which
contain substances able to filter, purify or disinfect the air.
13. Hood, according to the previous claim, characterized in that said air permeable walls, which contain said substances, form a single body with
said hollow means (17,17'17"), which substantially constitutes a cartridge for containing
said substances and which can be replaced once said substances are exhausted.
14. Hood, according to one or more of the previous claims, characterized in that said hollow means (17") comprises a seat (22) for housing a filter (20A), which can
be removed and replaced without the need of replacing said hollow means (17").
15. Hood, according to one or more of the previous claims, characterized in that the correct position for each operating mode, and therefore for each position of
said hollow means (17;17';17"), is indicated by means of letters or symbols being
marked on the body of said hollow means (17;17';17").
1. Saug- und/oder Filterhaube mit einer Strömungsablenkungsvorrichtung (12, 17, 12',
17', 17"), die aufweist
einen äußeren Sitz oder eine Umhüllung (12, 12'), die einen oder mehrere Einlässe
(13) umgrenzt, sowie einen oder mehrere Auslässe (14 bis 16),
ein Hohlraummittel (17, 17', 17") mit einer Anzahl von Öffnungen (18A bis 18G), in
Verbindung mit einer Kammer, die darin umgrenzt ist, durch welche Luft hindurchgehen
kann,
wobei das Hohlraummittel (17, 17', 17") in der Lage ist, in dem äußeren Sitz (12,
12') sich in eine Anzahl verschiedener alternativer Positionen (17A, 17B, 17C, 17D)
orientieren zu lassen,
wobei einen Einlass (13) des äußeren Sitzes (12, 12') in Ausrichtung mit einer Öffnung
(18A - 18G) des Hohlraummittels (17, 17', 17") liegt und ein Auslass (14-16) des äußeren
Sitzes (12, 12') in Ausrichtung mit einer anderen Öffnung (18A-18'G) des Hohlraummittels
(17, 17', 17") liegt,
dadurch gekennzeichnet, dass in jeder der Positionen (17A, 17B, 17C, 17D) der äußere Sitz (12, 12') alle Öffnungen
(18A-18G) des Hohlraummittels (17, 17', 17") behindert, außer der einen Öffnung und
der anderen Öffnung, und dass das Hohlraummittel (17, 17', 17") alle Einlässe und
Auslässe (13-16) desäußeren Sitzes (12, 12') behindert, außer dem einen Einlass (13)
und dem einen Auslass (14-16), wodurch Luft durch die Kammer nur zwischen dem einen
Einlass (13) und dem einen Auslass (14-16) strömen kann.
2. Haube nach Anspruch 1,
dadurch gekennzeichnet, dass in jeder der Positionen (17A, 17B, 17C, 17D) die eine Öffnung (18A-18G) und/oder
die andere Öffnung (18A-18G) sich außerhalb der Ausrichtung mit dem Einlass oder dem
Auslass (13-16) befindet, mit der sie in einer anderen der Positionen (17A, 17B, 17C,
17D) ausgerichtet ist.
3. Haube nach Anspruch 1,
dadurch gekennzeichnet, dass sie ein Gebläse (9B) aufweist, mit einem entsprechenden Rotor (9), wobei der äußere
Sitz (12, 12') in einer fixen Relativposition bezüglich des Rotors (9) ist.
4. Haube nach Anspruch 1,
dadurch gekennzeichnet, dass das Hohlraummittel (17, 17', 17") eine interne Ebene (20) aufweist, wo Luftbehandlungsmittel
(20A) angeordnet sind, wobei die Luft gezwungen oder gehindert wird durch die interne
Ebene (20) hindurchzugehen in Abhängigkeit von der Position (17A, 17B, 17C, 17D),
die für das Hohlraummittel (17, 17', 17") in dem äußeren Sitz (12, 12') gewählt ist.
5. Haube nach Anspruch 1,
dadurch gekennzeichnet, dass der äußere Sitz (12, 12') und das Hohlraummittel (17, 17") jeweils von schachtelartigen
Körpern aufgebaut sind mit insbesondere einer äußeren Fläche, die im Wesentlichen
quaderförmig oder zylindrisch gestaltet ist.
6. Haube nach einem oder mehreren der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass zwei Einlässe (13A, 13B) des äußeren Sitzes (12, 12') von zwei gesonderten Zonen
einer einzelnen Öffnung (13) gebildet sind,
wobei jeder der zwei Einlässe (13A, 13B) insbesondere auswählbar ist durch Verändern
der Position des Hohlraummittels (17, 17', 17") in dem äußeren Sitz.
7. Haube nach einem oder mehreren der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass der äußere Sitz (12, 12') insgesamt oder teilweise mittels Körperoberflächen und
Mitteln gebildet wird, die das Hohlraummittel (17, 17', 17") umgeben, wie zum Beispiel
vertikale oder horizontale Wände der Haube.
8. Haube nach einem oder mehreren der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass das Hohlraummittel (17, 17', 17") von einem Rahmen (17') gebildet ist mit Wänden
nur dort, wo sie erforderlich sind für funktionale oder strukturelle oder Stütz-Funktionen.
9. Haube nach einem oder mehreren der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass das Hohlraummittel (17, 17', 17") in dem äußeren Sitz (12, 12') mittels eines Verschlussmittels
(19) enthalten ist, das im Wesentlichen flach ist, wobei insbesondere das Verschlussmittel
(19) und der äußere Sitz (12, 12'), der das Hohlraummittel (17, 17', 17") enthält,
auf einer beliebigen Fläche gekoppelt sein können und zwar nicht nur auf einer flachen.
10. Haube nach einem oder mehreren der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass ein zusätzliches Strömungsablenkungsmittel (21) vorgesehen ist, welches die Luft
zwingt, durch das Hohlraummittel (17, 17', 17") zu gehen oder an ihr vorbeizugehen
für einen direkten Ausgang durch eine Auslassöffnung (15), wobei die zusätzliche Strömungsablenkungsvorrichtung
insbesondere ein Drosselventil aufweist.
11. Haube nach einem oder mehreren der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass das Hohlraumittel (17, 17', 17") Mittel zur Luftbehandlung (20A) enthält, wobei das
Luftbehandlungsmittel (20A) insbesondere in einer Zone angeordnet ist, die von der
Luft in Abhängigkeit von der Position (17A, 17B, 17C, 17D) durchquert wird oder nicht,
die für das Hohlraummittel (17, 17', 17") ausgewählt ist.
12. Haube nach dem vorhergehenden Anspruch,
dadurch gekennzeichnet, dass das Luftbehandlungsmittel (20A) von luftdurchlässigen Wänden (20B) gebildet ist,
die Substanzen enthalten, die in der Lage sind, Luft zu filtern, zu reinigen oder
zu desinfizieren.
13. Haube nach dem vorhergehenden Anspruch,
dadurch gekennzeichnet, dass luftdurchlässige Wände, welche die Substanzen enthalten, einen einzelnen Körper mit
dem Hohlraummittel (17, 17', 17") bilden, der im Wesentlichen eine Kartusche zum Aufnehmen
der Substanzen enthält und sich ersetzen lässt, wenn die Substanzen aufgebraucht sind.
14. Haube nach einem oder mehreren der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass das Hohlraummittel (17") einen Sitz (22) aufweist zum Unterbringen eines Filters
(20A), der entfernt und ersetzt werden kann ohne das Erfordernis, das Hohlraumittel
(17") zu ersetzen.
15. Haube nach einem oder mehreren der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die korrekte Position für jeden Betriebsmodus und daher für jede Position des Hohlraummittels
(17, 17', 17") mittels Buchstaben oder Symbolen angezeigt ist, die auf dem Körper
des Hohlraummittels (17, 17', 17") angebracht sind.
1. Hotte d'aspiration et/ou de filtration, possédant un dispositif déflecteur du courant
(12, 17 ; 12', 17' ; 17"), qui comprend
un siège ou enveloppe externe (12 ; 12') délimitant une ou plusieurs entrées (13)
et une ou plusieurs sorties (14-16),
un dispositif creux (17 ; 17' ; 17") ayant plusieurs orifices (18A-18G) communiquant
avec une chambre délimitée à l'intérieur et par lesquels l'air peut circuler,
le dispositif creux (17 ; 17' ; 17") pouvant être orienté dans le siège externe
(12 ; 12') à plusieurs positions différentes en alternance (17A, 17B, 17C, 17D) alors
que
une entrée (13) du siège externe (12 ; 12') est alignée sur un orifice (18A-18G)
du dispositif creux (17 ; 17' ; 17") et une sortie (14-16) de l'autre siège (12 ;
12') est alignée sur un autre orifice (18A-18G) du dispositif creux (17 ; 17' ; 17"),
caractérisée en ce que, dans chacune des positions (17A, 17B, 17C, 17D), le siège externe (12 ; 12') obstrue
tous les orifices (18A-18G) du dispositif creux (17 ; 17' ; 17") autres que le premier
orifice et l'autre orifice, et le dispositif creux (17 ; 17' ; 17") obstrue toutes
les entrées et sorties (13-16) du siège externe (12 ; 12') autres que ladite entrée
(13) et ladite sortie (14-16), si bien que l'air peut circuler dans la chambre uniquement
entre ladite entrée (13) et ladite sortie (14-16).
2. Hotte selon la revendication 1, caractérisée en ce que, dans chacune des positions (17A, 17B, 17C, 17D), ledit orifice (18A-18G) et/ou l'autre
orifice (18A-18G) n'est pas aligné sur l'entrée ou la sortie (13-16) sur laquelle
il est aligné dans une autre des positions (17A, 17B, 17C, 17D).
3. Hotte selon la revendication 1, caractérisée en ce qu'elle comprend un ventilateur (9B) ayant une volute respective (9), le siège externe
(12 ; 12') ayant une position relative fixe par rapport à la volute (9).
4. Hotte selon la revendication 1, caractérisée en ce que le dispositif creux (17 ; 17' ; 17") a un plan interne (20) dans lequel est placé
le dispositif de traitement d'air (20A), l'air étant obligé de circuler par le plan
interne (20) ou empêché de circuler par ce plan suivant la position (17A, 17B, 17C,
17D) choisie pour le dispositif creux (17 ; 17' ; 17") à l'intérieur du siège externe
(12 ; 12').
5. Hotte selon la revendication 1, caractérisée en ce que le siège externe (12 ; 12') et le dispositif creux (17 ; 17") sont constitués respectivement
de corps en forme de boîte ayant en particulier une surface externe ayant pratiquement
une forme de parallélépipède ou de cylindre.
6. Hotte selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que deux entrées (13A, 13B) du siège externe (12 ; 12') sont réalisées par deux zones
distinctes d'une seule ouverture (13), chacune des deux entrées (13A, 13B) pouvant
être sélectionnée en particulier par changement de la position du dispositif creux
(17 ; 17' ; 17") dans le siège externe.
7. Hotte selon une ou plusieurs des revendications précédentes, caractérisée en ce que le siège externe (12 ; 12') est obtenu totalement ou en partie par des surfaces de
corps et un dispositif qui entoure le dispositif creux (17 ; 17' ; 17") tel que par
exemple des parois verticales ou horizontales de la hotte.
8. Hotte selon une ou plusieurs des revendications précédentes, caractérisée en ce que le dispositif creux (17 ; 17', 17") est constitué par un cadre (17') ayant des parois
uniquement aux emplacements nécessaires pour des raisons fonctionnelles ou de résistance
de support.
9. Hotte selon une ou plusieurs des revendications précédentes, caractérisée en ce que le dispositif creux (17 ; 17' ; 17") est logé dans le siège externe (12 ; 12') à
l'aide d'un dispositif de fermeture (19) qui est pratiquement plat, et dans lequel
un dispositif particulier de fermeture (19) et le siège externe (12 ; 12') qui contient
l'espace creux (17 ; 17' ; 17") peuvent être couplés à une surface quelconque, même
non plane.
10. Hotte selon une ou plusieurs des revendications précédentes, caractérisée en ce qu'un dispositif déflecteur supplémentaire (21) est incorporé et oblige l'air à passer
dans le dispositif creux (17 ; 17' ; 17") ou à passer en dérivation pour une sortie
directe par un orifice d'évacuation (15), le dispositif déflecteur supplémentaire
comprenant un registre d'étranglement en particulier.
11. Hotte selon une ou plusieurs des revendications précédentes, caractérisée en ce que le dispositif creux (17 ; 17' ; 17") comporte un dispositif de traitement d'air (20A),
le dispositif de traitement d'air (20A) étant disposé en particulier dans une zone
qui est recoupée ou non par l'air suivant la position (17A, 17B, 17C, 17D) choisie
pour le dispositif creux (17 ; 17' ; 17").
12. Hotte selon l'une quelconque des revendications précédentes, caractérisée en ce que le dispositif de traitement d'air (20A) est constitué par des parois (20B) permettant
le passage d'air et contenant des substances capables de filtrer, purifier ou désinfecter
l'air.
13. Hotte selon la revendication précédentes, caractérisée en ce que les parois permettant le passage de l'air, contenant lesdites substances, forment
avec le dispositif creux (17 ; 17' ; 17") un corps unique qui constitue pratiquement
une cartouche destinée à contenir lesdites substances et qui peut être remplacée lorsque
ces substances sont épuisées.
14. Hotte selon une ou plusieurs des revendications précédentes, caractérisée en ce que le dispositif creux (17") comporte un siège (22) destiné à loger un filtre (20A)
qui peut être retiré et remplacé sans qu'il soit nécessaire de remplacer le dispositif
creux (17").
15. Hotte selon une ou plusieurs des revendications précédentes, caractérisée en ce que la position convenable pour chaque mode de fonctionnement et ainsi pour chaque position
du dispositif creux (17 ; 17' ; 17") est indiquée par des lettres ou symboles marqués
sur le corps du dispositif creux (17 ; 17' ; 17").