FR3057149A1 - COOKING APPARATUS, AND ASSEMBLY INCLUDING THIS APPARATUS AND A TABLE - Google Patents

Abstract

This apparatus (1) comprises a stone (4) for cooking food, a heating resistance of this stone (4), placed under the stone, and a support (2, 3) receiving this stone (4) and this resistance. According to the invention, - said support comprises a base (2) and two lateral uprights (3) connected to this base (2), adapted to receive the stone (4) and the resistor (7) between them; -the apparatus (1) comprises support pieces (8) adapted to be connected to said uprights (3) so as to jointly form a support location of the stone (4); - After mounting, the resistor is remote from the base (2), so that there is under the resistor, a free space (22) of the order of one to four centimeters thick. The free space (22) accessible from the outside of the device, allows to engage pans between the base (2) and the resistor. The stone cooking apparatus therefore also has the function of raclette apparatus.

Description

© Publication number: 3,057,149 (to be used only for reproduction orders)

©) National registration number: 16 59710 ® FRENCH REPUBLIC

NATIONAL INSTITUTE OF INDUSTRIAL PROPERTY

COURBEVOIE © Int Cl ⁸ : A 47 J 37/06 (2017.01), F24 C 15/20

A1 PATENT APPLICATION

©) Date of filing: 07.10.16. ©) Priority: ©) Applicant (s): CDI-B Limited liability company - FR. @ Inventor (s): BAUDURET VICTOR. ©) Date of public availability of the request: 04/13/18 Bulletin 18/15. ©) List of documents cited in the preliminary search report: See the end of this booklet (© References to other related national documents: ©) Holder (s): CDI-B Limited liability company. ©) Extension request (s): ©) Agent (s): LLR.

Pty COOKING APPARATUS, AND ASSEMBLY INCLUDING THIS APPARATUS AND A TABLE.

FR 3 057 149 - A1 (g /) This appliance (1) comprises a stone (4) for cooking food, a heating resistor for this stone (4), placed under the stone, and a support (2, 3) receiving this stone (4) and this resistance.

According to the invention,

- Said support comprises a base (2) and two lateral uprights (3) connected to this base (2), capable of receiving the stone (4) and the resistance (7) between them;

the apparatus (1) comprises support parts (8) able to be connected to said uprights (3) so as to jointly form a support site for the stone (4);

- After mounting, the resistor is at a distance from the base (2), so that there is under the resistor, a free space (22) of the order of one to four centimeters thick.

The free space (22), accessible from the outside of the device, allows stoves to be engaged between the base (2) and the resistance. The stone cooking appliance therefore also has the function of a raclette appliance.

The present invention relates to a cooking appliance and an assembly including this appliance and a table.

A cooking appliance comprising a food cooking stone, a heating resistance of this stone and a support receiving this stone and this resistance is known, in particular by the publication of patent application No. FR 2 644 561 (Bauduret).

Apparatuses known as raclette, comprising a resistance making it possible to melt cheese in frying pans placed under this resistance, are also known.

For an individual, and even more for a restaurateur, the possession of two devices poses a significant problem of space, and the present invention has the main objective of solving this problem.

In addition, for a restaurateur, this kind of apparatus is relatively complicated to use, in particular with regard to the installation of an apparatus on a table and the withdrawal of the apparatus from this table, or with regard to the cleaning the appliance.

The present invention also aims to solve this problem.

In addition, the use of such an appliance, including an electric supply wire, is not without danger for the users, who may get their feet in this wire and cause the hot appliance to fall from the table onto which this device is placed, which is particularly problematic for a restaurateur.

The present invention also aims to solve this problem.

Furthermore, the use of such devices in a restaurant poses a serious problem of release of smoke and odorous gases, generally quite prohibitive.

The present invention has the additional objective of solving this problem.

The apparatus concerned comprises, in a manner known per se, a food cooking stone, a heating resistance of this stone and a support receiving this stone and this resistance.

To achieve at least the aforementioned main objective, according to the invention,

- Said support comprises a base and two lateral uprights connected to this base, these uprights being located at a distance from each other greater than a dimension of the stone and of the resistance, so that this stone and this resistance are suitable for being placed between these uprights; each upright comprises first connecting means, located at a distance from said base;

- The apparatus comprises support pieces comprising second connecting means, able to cooperate with said first connecting means, these support pieces being thus able to be connected to said uprights so as to jointly form a support location for the stone ;

- Said distance separating said first connecting means and said base being such that, when the stone is placed on said support pieces and the resistor is placed under the stone, the resistor is located at a distance from the base, so that 'under resistance, there is a free space of the order of one to four centimeters thick.

The invention thus consists in making a support capable of securely holding the stone away from a base that the device comprises, so as to provide a free space under the resistance placed under the stone, accessible from outside the device, having a sufficient height to engage pans between the base and the resistance. The stone cooking appliance therefore also has the function of a raclette appliance.

Thanks to this dual function, the user only needs to have one device, not two, which gives him a significant gain in space. In addition, said amounts allow easy entry of the device, facilitating the installation of the device on a table and the removal of this device vis-à-vis this table.

Preferably, said first and second connecting means are shaped to allow a removable connection of said support pieces on said uprights.

These support parts can thus be separated from said uprights, to allow easy cleaning of the device.

According to a preferred embodiment of the invention, in this case,

each upright is hollow internally and said first connecting means are in the form of at least one mounting slot arranged through a wall of the upright;

- For each support piece, said second connecting means are in the form of at least one tab dimensioned to be engaged through a corresponding mounting slot of an upright and to come into engagement with walls of the upright so as to be aligned with the amount.

The mounting and dismounting of the support parts relative to the uprights are thus easy and quick to perform.

Advantageously, in this case, each aforementioned tab has a groove opening into an edge of the tab, this groove allowing, once said tab engaged through said slot, the engagement of the tab on the portion of the wall located below of this slot, straddling this portion of wall, the tab thus hooking on this portion of wall.

A secure connection of the support piece to the upright is thus ensured.

Advantageously, the device comprises:

a separation plate having an opening, the outline of which is adjusted to the shape which said uprights and said baking stone have on the outside, and

- At least two surfaces for receiving this plate, positioned so that the plate, when it is in abutment against these reception surfaces, is located at the height of the stone.

This separation plate, when placed around the baking stone, laterally extends the separation between the space below the stone and the surrounding space, which allows additional heat to be confined produced by the resistance at the level of this space located below the stone, and thus to obtain a reinforced oven effect, favorable for the cooking of cheese. In addition, when the uprights are hollow internally, that they have suction openings and that they are used as suction pipes for the gases released by the cooking of the cheese, as will be described later, this same separation plate makes it possible to limit this release of gases to the surrounding space and constitutes a deflector promoting the capture of these gases by said suction openings. The plate separates the space situated below the stone from the space situated above this stone, which allows an optimized and improved aspiration of each of these two spaces, without the existence of turbulent gas flow. a space to another, which occurs in the absence of this plate.

According to a preferred embodiment of the apparatus comprising this separation plate:

- Said support pieces are shaped so that parts of these pieces protrude beyond the periphery of the baking stone when this stone is placed in the support location formed by these support pieces; and

- Said receiving surfaces of the separation plate are formed by said parts of the support pieces which protrude beyond the periphery of the cooking piece.

The invention also relates to the assembly formed by the above-mentioned cooking appliance and by a table; in this set:

- The base of the device comprises first engagement means;

the table comprises second engagement means, and

the base of the device comprises first electrical connection means and the table comprises second electrical connection means capable of coming into electrical connection with the first electrical connection means when the respective engagement means of the device and of the table are brought into a state of reciprocal engagement, and able to be electrically disconnected from the first electrical connection means when the respective engagement means of the apparatus and of the table are brought out of said state of reciprocal commitment.

When the respective engagement means are in the reciprocal engagement state, the apparatus is perfectly wedged relative to the table. In addition, it does not include any electrical wire outside the base, which eliminates the risk of a user getting caught in such a wire and causing the device to fall. The assembly according to the invention is thus practical to use, by an individual but especially by a restaurateur.

Said assembly advantageously comprises one or more covering elements, capable of covering said engagement means and said second electrical connection means when the apparatus is not used.

According to a preferred embodiment of the invention, said first and second engagement means are in the form of respective sockets capable of coming into reciprocal nesting.

According to an improved embodiment of the invention,

each upright is hollow internally and has a connection opening and at least one suction opening;

the table comprises air suction means and means for filtering and / or treating the air drawn in, and

- When the respective engagement means of the device and of the table are brought into a state of mutual engagement, the connection openings that comprise said uprights come into connection with conduits or with an enclosed space placed under vacuum by said air suction means.

Said uprights thus form suction sleeves for the smokes and odorous gases generated by cooking the food.

Advantageously, in this case,

- The table has a base communicating, at its upper part, with a cavity provided in the table, this cavity being intended to receive the base of the cooking appliance;

- Said air suction means and said filtration and / or treatment means of the sucked air are located in this leg of the table;

- The base includes at least one opening for diffusing the filtered and / or treated air, in particular located close to the ground.

The assembly formed by the device and the table is thus autonomous, in the sense that it comprises its own means of suction and filtration / air treatment. As it is used in a restaurant, the device is therefore not connected to a centralized suction network.

Said air suction means can in particular be constituted by a fan, and said means for filtering and / or treating the aspirated air can in particular be constituted by a photocatalysis apparatus, that is to say an apparatus comprising an activated carbon membrane, through which the smoke and exhaust gases pass, and one or more ultraviolet lamps, degrading the particles filtered by means of said membrane.

According to an improved embodiment of the invention, each upright comprises, at its wall facing the other upright, at least two suction openings in the form of transverse slots, one of which is located in said free receiving space of pans, substantially at the height of the upper edge of these pans, and another one located a few millimeters above the upper surface of the stone.

These transverse slots carry out aspirations according to laminar air flows, at the height of the smoke and odor gas release locations, and prove to be particularly effective for sucking up these fumes and gases.

It will be understood that by transverse means a direction perpendicular to the longitudinal direction of the uprights, and therefore horizontal in the operating position of the device.

Preferably,

each upright comprises, at its wall facing the other upright, at least third suction opening in the form of a transverse slot, situated on the side of the end of the upright remote from said base; and

- each upright has a top plate extending perpendicular to the upright and above the stone.

The combination of this upper opening in the form of a slot and of this top plate proves to make it possible to efficiently channel, and to capture, the fumes and gases not captured by the abovementioned suction openings.

It is possible to provide that the two top plates of the two uprights join one another, thus forming a single top plate.

Advantageously, at least one upright further comprises, on at least one of its faces perpendicular to the faces which are opposite one another, longitudinal suction openings.

These openings allow additional suction, supplementing the suction produced by the other suction openings that comprise said uprights.

The invention will be clearly understood, and other characteristics and advantages thereof will appear, with reference to the appended schematic drawing, this drawing representing, by way of nonlimiting example, a preferred embodiment of the cooking appliance. and of the device / table assembly concerned.

Figure 1 is a perspective view of the apparatus;

Figure 2 is an exploded perspective view of a base, two uprights and four support parts that the device comprises;

Figure 3 is an exploded perspective view of various elements that comprise the apparatus;

Figure 4 is an exploded perspective view of said assembly formed by the apparatus and the table;

Figure 5 is a view of this assembly in the assembled state, in longitudinal section passing through the longitudinal axis of the table leg; and FIG. 6 is a view of the appliance similar to FIG. 1 after a separation plate has been placed around side uprights and a baking stone which the appliance includes.

FIG. 1 represents a cooking appliance 1, including a base 2, two uprights 3, a stone 4, a crown plate 5 and four pans 6 for raclette. It appears in FIGS. 2 and 3 that the device 1 also includes a resistor 7 and support parts 8, and in FIG. 6 that this device also includes a separation plate 9.

The base 2, the uprights 3, the support parts 8 and the separation plate 9 are made of metallic material, in particular stainless steel; the top plate 5 is made of glass.

As shown in Figures 1 to 3, the base 2 comprises a frame 10 and two plates 11 fixed to this frame.

The chassis 10 has a bottom and peripheral walls surrounding this bottom. The bottom has two lateral openings 12 intended to receive the lower parts of the uprights 3, lower fixing lugs 13 bordering these openings 12, intended to allow the fixing of the uprights 3 to the chassis 10, and an opening 14 intended to allow passage to the across said bottom of a male electrical connection part, of the type usually found on a kettle base. Above this opening 14, the bottom receives an electrical connection box (not shown), forming the female electrical connection part corresponding to said male plug and which is electrically connected to the two ends of the resistor 7.

The peripheral walls of the chassis 10 form a socket intended to cooperate with a corresponding socket formed by the table 25, as will be described below.

The plates 11 are dimensioned so as to completely cover the frame 10 and to extend far beyond the peripheral walls of the latter. They are intended to be each engaged around the uprights 3 and to come one against the other, and have for this purpose, as visible in FIG. 3, cutouts 15 allowing their engagement around the uprights 3 and, along their edges intended to come next to each other, wings 11a coming into contact with one another. These plates 11 also include positioning ribs (not visible), engaging behind the peripheral walls of the chassis 10, these ribs ensuring the maintenance of the plates 11 in the mounting position visible in FIG. 1.

Each upright 3 is formed by a tubular metal part, of rectangular section in the example shown. At its lower part, it is open, so that it forms a lower opening for connection to suction conduits 31 described below, and its side walls form two legs 16 intended to cooperate with the legs 13 of the chassis 10 for ensuring the assembly of the uprights 3 and the frame 10. At its upper part, it has an upper transverse wall 17, closing this upper part, and its wall facing the other upright 3 is interrupted at this wall 17 while that the other walls of the upright 3 extend beyond the wall 17. This wall 17 and the portions of the walls of the upright 3 extend beyond this wall 17 thus define a housing for receiving the top plate 5.

Each amount 3 also presents:

at the level of its wall facing the other upright 3, three suction openings in the form of transverse slots 18, one of which is located in a space for receiving the pans 6 arranged under the resistor 7, substantially at the height of the upper edge of these pans, a second of which is located a few millimeters above the upper surface of the stone 4 when this stone is in the mounting position in the apparatus 1 shown in FIG. 1, and the third of which is located slightly below the wall 17;

- Also at this same wall facing the other upright 3, two mounting slots 19 extending between said first and second transverse slots 18, along the edges of said wall connecting to the side walls of the upright; and

at its side walls, two longitudinal openings 20, extending substantially from a height close to said third slot 18 to a height located substantially midway between said first and second slots 18.

Stone 4 is a stone of known type for cooking food, parallelepiped and has a square shape, in particular of the type described in the publication of patent application No. FR 2 644 561 mentioned above.

The top plate 5 is dimensioned so as to take place in the two aforementioned receiving housings present at the upper end of the uprights 3.

The pans 6 are of a well-known type, in particular of stamped metal, coated with a non-stick layer and equipped with a synthetic material handle.

Resistor 7 is also of a well known type for heating a food cooking stone, in particular of the type described in the publication of patent application No. FR 2 644 561 mentioned above.

The support parts 8 are formed by folding cut sheet metal parts. As can be understood with reference to FIGS. 2 and 3, each part 8 comprises a body 8a in the general shape of a right triangle, a mounting tab 8b adjoining the short side of this triangle, folded at right angles to the body 8a, a support wing 8c adjoining the long side of this triangle, folded at right angles to the body 8a, and a stop wing 8d adjoining this support wing 8c and folded at right angles to it.

It also appears that each tab 8b has, on the side of the body 8a, a groove 21 extending a little more than half the height of the tab 8b, from the edge of this tab 8b opposite to that located on the side of the wings 8c and 8d. The width of this groove 21 is slightly greater than the thickness of the wall of each upright 3 having the mounting slots 19.

As shown in FIG. 3, each lug 8b has a height such that it is capable of being engaged in an adjusted manner in a corresponding slot 19, and each groove 21 is arranged so as to allow, once the lug 8b engaged in through the slot 19, the engagement of this tab 8b on the wall of the upright 3 having the slot 19, this tab 8b engaging on the wall portion located under the slot 19, thus hooking on this wall. The tab 8b is also dimensioned such that the edge of the tab 8b opposite the body 8a is in the immediate vicinity of the wall of the upright 3 opposite to that having the slot 19.

As is understood with reference to Figures 1 to 3, the two uprights 3, once mounted on the frame 10, are located at a distance from each other slightly greater than one side of the stone 4 and the length of the resistor 7, so that this stone 4 and this resistor 7 are able to be placed between them. The support pieces 8, once placed on the uprights 3, jointly form a support location for the stone 4, the wings 8c receiving the stone 4 and the stop wings 8d immobilizing this stone in a direction perpendicular to that ranging from an amount 3 to another.

It also appears that the locations of the slots 19 and the positions of the support wings 8c on the parts 8 are defined in such a way that the stone 4 and the resistor 7 are positioned at a distance from the surfaces of the plates 11 such that, when the stone 4 is placed on the said pieces 8 and the resistor 7 is placed under the stone, there is a free space 22 between the resistor 7 and the said surfaces, having a height of the order of one to four centimeters, therefore sufficient to engage the pans 6 in this space and ideal for allowing cheese placed in the pans 6 to melt.

Figures 4 and 5 show a table 25 forming an assembly with the apparatus 1 as mentioned above. As shown, the plate 26 of the table 25 has an opening 27 forming a socket for the adjusted reception of the aforementioned corresponding socket formed by the side walls of the frame 10. Around this opening 27, the plate 26 forms a rebate 28 for receiving the plates 11 flush with the surface of this plate, and includes walls 29 integral with it, forming surfaces for receiving the chassis 10.

The foot 30 of the table 25 is hollow internally and contains two conduits 31 opening at the level of said opening 27, so that the connection openings formed by the lower ends of the uprights 3 come into connection with the upper openings of these conduits 31 when the device 1 is placed on the opening 27.

The conduits 31 open into a plenum 32 communicating with a photocatalysis apparatus 33, that is to say an apparatus comprising an activated carbon membrane and one or more ultraviolet lamps, and with a fan creating an air flow at the through this device 33, this fan discharging the treated air at the level of openings opening into the lower part of the foot 30.

Referring to Figure 6, it appears that the separation plate 9 has a central opening whose outline is adjusted to the shape that externally have the uprights 3 and the baking stone 4. The stop wings 8d of the support pieces 8 protrude beyond the periphery of the baking stone 4 and constitute surfaces for receiving the plate 9 at the height of the stone 4.

The separation plate 9 thus makes it possible to laterally extend the separation between the space located below the stone 4 and the surrounding space, which makes it possible to further confine the heat produced by the resistor 7 at this level. space, and therefore to obtain a reinforced oven effect, favorable for cooking cheese. In addition, it makes it possible to limit the release of the gases generated by the cooking of the cheese towards the surrounding space and constitutes a deflector promoting the capture of these gases by the suction openings which constitute the slots 18.

In FIG. 6, the separation plate 9 has been shown as having dimensions equal to the base plate formed by the two plates 11; of course, this separation plate 9 can have dimensions greater or less than this base plate.

The opening that the separation plate 9 includes for its engagement around the stone 4 can be adjusted to the dimensions of the periphery of this stone; preferably, however, in order to limit the heat exchanges between the stone 4 and the plate 9, said opening may be of dimensions slightly greater than this periphery, so that its edges which delimit this opening are set back from the edge of the stone 4, and the plate 9 can punctually form bosses for positioning the plate 9 relative to the stone 4.

As appears from the above, the invention provides a cooking appliance 1 allowing both cooking of food on the stone 4 and use for a squeegee, and therefore having the determining advantage of allowing the user to have to have only one device, and not two, which gives this user a significant gain in space.

In addition, said uprights 3 form handles allowing easy gripping of the device 1, and the removability of the parts 8 relative to the uprights 3 allows easy cleaning of this device.

The assembly including the device 1 and the table 25 has the decisive advantages of facilitating the installation of the device 1 on the table 25 and the removal of this device from this table, of perfectly wedging the device 1 with respect to table 25, and to eliminate the presence of an electric wire external to the base 2 of device 1. In addition, the uprights 3 form suction pipes for the smoke and odorous gases generated by cooking food, both on the stone 4 and at the level of pans 6; these sleeves allow effective extraction of these fumes and gases taking into account the shape and the aforementioned arrangement of the slots 18 and 20 and of the crown plate 5.

The assembly formed by the device 1 and the table 25 is also autonomous, in the sense that it includes its own suction and filtration / air treatment means, therefore, as regards use. in a restaurant, that it is not connected to a centralized air intake and air treatment system.

The invention has been described above with reference to an embodiment given by way of example. It goes without saying that it is not limited to this embodiment and that it extends to all the other embodiments covered by the appended claims.

Claims (14)

1. Cooking appliance (1) comprising a stone (4) for cooking food, a resistance (7) for heating this stone (4) and a support (2, 3) receiving this stone (4) and this resistance ( 7); characterized in that: - Said support comprises a base (2) and two lateral uprights (3) connected to this base (2), these uprights (3) being located at a distance from each other greater than one dimension of the stone (4 ) and the resistance (7), so that this stone (4) and this resistance (7) are able to be placed between these uprights; each upright (3) comprises first connecting means (19), located at a distance from said base (2); - The apparatus (1) comprises support pieces (8) comprising second connecting means (8b, 21), able to cooperate with said first connecting means (19), these support pieces (8) thus being able to be connected to said uprights (3) so as to jointly form a support site for the stone (4); said distance separating said first connecting means (19) and said base (2) being such that, when the stone (4) is placed on said support pieces (8) and that the resistor (7) is placed under the stone (4), the resistor (7) is located at a distance from the base (2), so that there exists under the resistor (7), a free space (22) of the order of one to four centimeters d 'thickness. 2. Apparatus (1) according to claim 1, characterized in that said first and second connecting means (19; 8b, 21) are shaped to allow a removable connection of said support pieces (8) on said uprights (3). 3. Apparatus (1) according to claim 2, characterized in that: - Each upright (3) is hollow internally and said first connecting means are in the form of at least one mounting slot (19) arranged through a wall of the upright (3); - For each support piece (8), said second connecting means are in the form of at least one tab (8b) dimensioned to be engaged through a corresponding mounting slot (19) of an amount (3) and to come into engagement with walls of the upright (3) so as to be wedged relative to this upright. 4. Apparatus (1) according to claim 3, characterized in that each tab (8b) has a groove (21) opening into an edge of the tab, this groove (21) allowing, once said tab (8b) engaged in across said slot (19), the engagement of the tab (8b) on the portion of the wall located below this slot (19), straddling this portion of wall, the tab (8b) thus hooking on this portion of wall. 5. Apparatus (1) according to one of claims 1 to 4, characterized in that it comprises: a separation plate (9) having an opening whose contour is adjusted to the shape which said posts (3) and said baking stone (4) have on the outside, and - At least two surfaces for receiving this plate, positioned so that the separation plate (9), when it is pressed against these reception surfaces, is located at the height of the stone (4). 6. Apparatus (1) according to claim 5, characterized in that: - Said support parts (8) are shaped so that parts (8d) of these parts protrude beyond the periphery of the baking stone (4) when this stone is placed in the location of support formed by these support pieces (8); and - Said receiving surfaces of the separation plate (9) are formed by said parts (8d) of the support pieces (8) which protrude beyond the periphery of the cooking piece (4). 7. An assembly formed by the cooking appliance (1) according to one of claims 1 to 5 and by a table (25), characterized in that, in this assembly: the base (2) of the device (1) comprises first engagement means (10); the table (25) comprises second engagement means (27), and the base (2) of the appliance (1) comprises first electrical connection means and the table (25) comprises second electrical connection means capable of coming into electrical connection with the first electrical connection means when the means respective engagement (10, 27) of the apparatus (1) and the table (25) are brought into a state of mutual engagement, and adapted to be electrically disconnected from the first electrical connection means when the respective engagement means (10, 27) of the apparatus (1) and the table (25) are brought out of said reciprocal engagement state. 8. An assembly according to claim 7, characterized in that it comprises one or more covering elements, capable of covering said engagement means and said second electrical connection means when the device (1) is not used. 9. An assembly according to claim 7 or claim 8, characterized in that said first and second engagement means (10, 27) are in the form of respective sockets capable of coming into reciprocal nesting. 10. Assembly according to one of claims 7 to 9, characterized in that: each upright (3) is internally hollow and has a connection opening and at least one suction opening (18, 20); the table (25) comprises air suction means and means (33) for filtering and / or treating the aspirated air, and - When the respective engagement means (10, 27) of the device (1) and the table (25) are brought into a state of mutual engagement, the connection openings that comprise said uprights (3) come into connection with conduits (31) or with an enclosed space placed under vacuum by said air suction means. 11. An assembly according to claim 10, characterized in that: - The table (25) has a foot (30) communicating, at its upper part, with a cavity (27) arranged in the table (25), this cavity being intended to receive the base (2) of the apparatus of cooking (1); - Said air suction means and said means (33) for filtering and / or treating the aspirated air are located in this leg (30) of the table (25); the foot (30) comprises at least one opening for diffusing the filtered and / or treated air, in particular located close to the ground. 12. An assembly according to claim 10 or claim 11, characterized in that each upright (3) comprises, at its wall facing the other upright (3), at least two suction openings (18) under the form of transverse slots, one of which is located in said free space (22) for receiving 5 pans (6), substantially at the height of the upper edge of these pans, and one of which is located a few millimeters above the upper surface of the stone (4). 13. An assembly according to claim 12, characterized in that: -each upright (3) includes, at its wall facing the other 10 upright (3), at least third suction opening (18) in the form of a transverse slot, situated on the side of the end of the upright (3) remote from said base (2); and each upright (3) has a crown plate (5) extending perpendicular to the upright (3) and above the stone (4). 15 14. An assembly according to claim 12 or claim 13, characterized in that at least one upright (3) comprises, on at least one of its faces perpendicular to the faces which are opposite one another, longitudinal suction openings (20). 5 4